- 08 May, 2020 26 commits
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Dick Kennedy authored
In an audit of lockdep calls in the driver, there are multiple lockdep checks in successive calling layers. E.g. a routine checks, and then calls a lower routine that also checks, and so on. Calling sequences result in many redundant checks. Refine the code to remove lower-level lockdep checks. Update comments on the lock, correcting a few places where lock object in comment was incorrect. Link: https://lore.kernel.org/r/20200501214310.91713-7-jsmart2021@gmail.comReviewed-by:
Hannes Reinecke <hare@suse.de> 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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Dick Kennedy authored
By default, the driver attempts to allocate a hdwq per logical cpu in order to provide good cpu affinity. Some systems have extremely high cpu counts and this can significantly raise memory consumption. In testing on x86 platforms (non-AMD) it is found that sharing of a hdwq by a physical cpu and its HT cpu can occur with little performance degredation. By sharing, the hdwq count can be halved, significantly reducing the memory overhead. Change the default behavior of the driver on non-AMD x86 platforms to share a hdwq by the cpu and its HT cpu. Link: https://lore.kernel.org/r/20200501214310.91713-6-jsmart2021@gmail.comReviewed-by:
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Dick Kennedy authored
Implementation of a previous patch added a condition to an if check that always end up with the if test being true. Execution of the else clause was inadvertently negated. The additional condition check was incorrect and unnecessary after the other modifications had been done in that patch. Remove the check from the if series. Link: https://lore.kernel.org/r/20200501214310.91713-5-jsmart2021@gmail.com Fixes: b95b2119 ("scsi: lpfc: Fix loss of remote port after devloss due to lack of RPIs") Cc: <stable@vger.kernel.org> # v5.4+ Reviewed-by:
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Dick Kennedy authored
The lldd rebinds the ndlp with rport during a nvme rport registration (via nvme_fc_register_remoteport). If rport & ndlp pointers are same as the previous one, the lldd will re-use the ndlp and rport association without re-initialization. This assumption is incorrect. The lldd should be ignorant of whether the returned rport pointer is new or not, and should always assume it is new. Remove the re-binding code, always assumes that rport pointer received from transport is a new pointer. Link: https://lore.kernel.org/r/20200501214310.91713-4-jsmart2021@gmail.comReviewed-by:
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Dick Kennedy authored
A previous change introduced the atomic use of queue_claimed flag for eq's and cq's. The code works fine, but the clearing of the queue_claimed flag is not atomic. Change queue_claimed = 0 into xchg(&queue_claimed, 0) to be consistent for change under atomicity. Link: https://lore.kernel.org/r/20200501214310.91713-3-jsmart2021@gmail.comReviewed-by:
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Bodo Stroesser authored
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.comReviewed-by:
Mike Christie <mchristi@redhat.com> Signed-off-by:
Bodo Stroesser <bstroesser@ts.fujitsu.com> Signed-off-by:
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Bodo Stroesser authored
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.comReviewed-by:
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Bodo Stroesser authored
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.comReviewed-by:
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Bodo Stroesser authored
In commit b49d6f78 ("scsi: target: add emulate_pr backstore attr to toggle PR support") the new attribute emulate_pr was added. passthrough_parse_cdb() uses the attribute's value to distinguish whether reservation commands should be rejected or not. But the new attribute was not added to passthrough_attrib_attrs, so in pscsi and tcmu - the users of passthrough_parse_cdb() - the attribute is not available to change parser's behavior. Link: https://lore.kernel.org/r/20200427150823.15350-2-bstroesser@ts.fujitsu.comReviewed-by:
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Sreekanth Reddy authored
By default DIF Type 1, DIF Type 2 & DIF Type 3 will be enabled. Also, users can enable either DIF Type 1 or DIF Type 2 or DIF Type 3 or in any combination using the prot_mask module parameter. However, when the user provides a prot_mask module parameter value of zero, then the driver is not disabling the DIF. Instead it enables all three types. Modify the driver to disable the DIF support if the user provides a prot_mask module parameter value of zero. Link: https://lore.kernel.org/r/1588065902-2726-1-git-send-email-sreekanth.reddy@broadcom.comSigned-off-by:
Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by:
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Suganath Prabu authored
Updated maintainers list for MPT DRIVERS Link: https://lore.kernel.org/r/1588056428-29369-1-git-send-email-suganath-prabu.subramani@broadcom.comSigned-off-by:
Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by:
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Suganath Prabu authored
Information needed to debug driver problems and firmware faults is stored in the IOC’s MPT3SAS_ADAPTER data structure. Parameters such as IOCFacts, IOC flags (related to sge, MSI-X, error recovery etc.), performance mode type, TMs, internal commands reply status, etc. are present. For debugging purposes, it is therefore helpful to be able to capture this information so that the fault can be analyzed. Export the MPT3SAS_ADAPTER data structure in debugfs. The data is available in: /sys/kernel/debug/mpt3sas/scsi_hostX/ioc_dump Link: https://lore.kernel.org/r/1588056322-29227-1-git-send-email-suganath-prabu.subramani@broadcom.comSigned-off-by:
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Jason Yan authored
Fix the following coccicheck warning: drivers/scsi/mpt3sas/mpt3sas_base.c:7202:1-19: WARNING: Assignment of 0/1 to bool variable Link: https://lore.kernel.org/r/20200430121738.15151-1-yanaijie@huawei.comSigned-off-by:
Jason Yan <yanaijie@huawei.com> Signed-off-by:
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Jason Yan authored
Fix the following coccicheck warning: drivers/scsi/vmw_pvscsi.c:911:2-18: WARNING: Assignment of 0/1 to bool variable Link: https://lore.kernel.org/r/20200430121729.15064-1-yanaijie@huawei.comSigned-off-by:
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Jason Yan authored
Fix the following coccicheck warning: drivers/scsi/fnic/fnic_scsi.c:2627:5-36: WARNING: Comparison of 0/1 to bool variable Link: https://lore.kernel.org/r/20200430121718.14970-1-yanaijie@huawei.comSigned-off-by:
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Jason Yan authored
Fix the following coccicheck warning: drivers/scsi/qedi/qedi_main.c:1309:5-25: WARNING: Comparison of 0/1 to bool variable drivers/scsi/qedi/qedi_main.c:1315:5-25: WARNING: Comparison of 0/1 to bool variable Link: https://lore.kernel.org/r/20200430121706.14879-1-yanaijie@huawei.comAcked-by:
Manish Rangankar <mrangankar@marvell.com> Signed-off-by:
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Zou Wei authored
Fix the following sparse warnings: drivers/scsi/aacraid/linit.c:867:6: warning: symbol 'aac_tmf_callback' was not declared. Should it be static? drivers/scsi/aacraid/linit.c:1081:5: warning: symbol 'aac_eh_host_reset' was not declared. Should it be static? drivers/scsi/aacraid/commsup.c:2354:5: warning: symbol 'aac_send_safw_hostttime' was not declared. Should it be static? drivers/scsi/aacraid/commsup.c:2383:5: warning: symbol 'aac_send_hosttime' was not declared. Should it be static? Link: https://lore.kernel.org/r/1588240932-69020-1-git-send-email-zou_wei@huawei.comReported-by:
Hulk Robot <hulkci@huawei.com> Signed-off-by:
Zou Wei <zou_wei@huawei.com> Signed-off-by:
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Jason Yan authored
No other functions use the return value of qlafx00_process_aen() and the return value is always 0 now. Make it return void. This fixes the following coccicheck warning: drivers/scsi/qla2xxx/qla_mr.c:1716:5-9: Unneeded variable: "rval". Return "0" on line 1768 Link: https://lore.kernel.org/r/20200506061757.19536-1-yanaijie@huawei.comReviewed-by:
Bart Van Assche <bvanassche@acm.org> Signed-off-by:
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Jason Yan authored
Fix the following coccicheck warning: drivers/scsi/qla2xxx/qla_tmpl.c:1120:2-20: WARNING: Assignment of 0/1 to bool variable Link: https://lore.kernel.org/r/20200430121800.15323-1-yanaijie@huawei.comSigned-off-by:
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Jason Yan authored
Fix the following coccicheck warning: drivers/scsi/qla2xxx/qla_tmpl.c:1031:6-20: WARNING: Assignment of 0/1 to bool variable drivers/scsi/qla2xxx/qla_tmpl.c:1062:3-17: WARNING: Assignment of 0/1 to bool variable Link: https://lore.kernel.org/r/20200430121751.15232-1-yanaijie@huawei.comReviewed-by:
Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by:
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Jason Yan authored
The return value is not used by the caller and the local variable 'rc' is not needed. Make qla_set_ini_mode() return void and remove 'rc'. This also fixes the following coccicheck warning: drivers/scsi/qla2xxx/qla_attr.c:1906:5-7: Unneeded variable: "rc". Return "0" on line 2180 Link: https://lore.kernel.org/r/20200429140952.8240-1-yanaijie@huawei.comSigned-off-by:
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Viacheslav Dubeyko authored
The goal of the following command sequence is to restart the adapter. However, the tgt_stop flag remains set, indicating that the adapter is still in stopping state even after re-enabling it. echo 0x7fffffff > /sys/module/qla2xxx/parameters/logging modprobe target_core_mod modprobe tcm_qla2xxx mkdir /sys/kernel/config/target/qla2xxx mkdir /sys/kernel/config/target/qla2xxx/<port-name> mkdir /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1 echo 1 > /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1/enable echo 0 > /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1/enable echo 1 > /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1/enable kernel: PID 1396:qla_target.c:1555 qlt_stop_phase1(): tgt_stop 0x0, tgt_stopped 0x0 kernel: qla2xxx [0001:00:02.0]-e803:1: PID 1396:qla_target.c:1567: Stopping target for host 1(c0000000033557e8) kernel: PID 1396:qla_target.c:1579 qlt_stop_phase1(): tgt_stop 0x1, tgt_stopped 0x0 kernel: PID 1396:qla_target.c:1266 qlt_schedule_sess_for_deletion(): tgt_stop 0x1, tgt_stopped 0x0 kernel: qla2xxx [0001:00:02.0]-e801:1: PID 1396:qla_target.c:1316: Scheduling sess c00000002d5cd800 for deletion 21:00:00:24:ff:7f:35:c7 <skipped> kernel: qla2xxx [0001:00:02.0]-290a:1: PID 340:qla_target.c:1187: qlt_unreg_sess sess c00000002d5cd800 for deletion 21:00:00:24:ff:7f:35:c7 <skipped> kernel: qla2xxx [0001:00:02.0]-f801:1: PID 340:qla_target.c:1145: Unregistration of sess c00000002d5cd800 21:00:00:24:ff:7f:35:c7 finished fcp_cnt 0 kernel: PID 340:qla_target.c:1155 qlt_free_session_done(): tgt_stop 0x1, tgt_stopped 0x0 kernel: qla2xxx [0001:00:02.0]-4807:1: PID 346:qla_os.c:6329: ISP abort scheduled. <skipped> kernel: qla2xxx [0001:00:02.0]-28f1:1: PID 346:qla_os.c:3956: Mark all dev lost kernel: PID 346:qla_target.c:1266 qlt_schedule_sess_for_deletion(): tgt_stop 0x1, tgt_stopped 0x0 kernel: qla2xxx [0001:00:02.0]-4808:1: PID 346:qla_os.c:6338: ISP abort end. <skipped> kernel: PID 1396:qla_target.c:6812 qlt_enable_vha(): tgt_stop 0x1, tgt_stopped 0x0 <skipped> kernel: qla2xxx [0001:00:02.0]-4807:1: PID 346:qla_os.c:6329: ISP abort scheduled. <skipped> kernel: qla2xxx [0001:00:02.0]-4808:1: PID 346:qla_os.c:6338: ISP abort end. qlt_handle_cmd_for_atio() rejects the request to send commands because the adapter is in the stopping state: kernel: PID 0:qla_target.c:4442 qlt_handle_cmd_for_atio(): tgt_stop 0x1, tgt_stopped 0x0 kernel: qla2xxx [0001:00:02.0]-3861:1: PID 0:qla_target.c:4447: New command while device c000000005314600 is shutting down kernel: qla2xxx [0001:00:02.0]-e85f:1: PID 0:qla_target.c:5728: qla_target: Unable to send command to target This patch calls qla_stop_phase2() in addition to qlt_stop_phase1() in tcm_qla2xxx_tpg_enable_store() and tcm_qla2xxx_npiv_tpg_enable_store(). The qlt_stop_phase1() marks adapter as stopping (tgt_stop == 0x1, tgt_stopped == 0x0) but qlt_stop_phase2() marks adapter as stopped (tgt_stop == 0x0, tgt_stopped == 0x1). Link: https://lore.kernel.org/r/52be1e8a3537f6c5407eae3edd4c8e08a9545ea5.camel@yadro.comReviewed-by:
Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by:
Viacheslav Dubeyko <v.dubeiko@yadro.com> Signed-off-by:
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Viacheslav Dubeyko authored
The following sequence of commands result in an incorrect failure message being printed: echo 0x7fffffff > /sys/module/qla2xxx/parameters/logging modprobe target_core_mod modprobe tcm_qla2xxx mkdir /sys/kernel/config/target/qla2xxx mkdir /sys/kernel/config/target/qla2xxx/<port-name> mkdir /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1 echo 1 > /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1/enable echo 0 > /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1/enable qla2xxx [0001:00:02.0]-e881:1: qla2x00_wait_for_hba_online() failed The reason of this message is the QLA_FUNCTION_FAILED code that qla2x00_wait_for_hba_online() returns. However, qlt_disable_vha() expects that adapter is offlined and QLA_FUNCTION_FAILED informs about the offline state of the adapter. The qla2x00_abort_isp() function finishes the execution at the point of checking the adapter's mode (for example, qla_tgt_mode_enabled()) because of the qlt_disable_vha() calls qlt_clear_mode() method. It means that qla2x00_abort_isp() keeps vha->flags.online is equal to zero. Finally, qla2x00_wait_for_hba_online() checks the state of this flag and returns QLA_FUNCTION_FAILED error code. This patch changes the failure message which informs about adapter's offline state. Link: https://lore.kernel.org/r/3cd0bbf3599c53b0c2a7184582d705d8b8052c8b.camel@yadro.comReviewed-by:
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Viacheslav Dubeyko authored
Currently, FC target reset finishes with the warning message: [84010.596893] ------------[ cut here ]------------ [84010.596917] WARNING: CPU: 238 PID: 279973 at ../drivers/scsi/qla2xxx/qla_target.c:6644 qlt_enable_vha+0x1d0/0x260 [qla2xxx] [84010.596918] Modules linked in: vrf af_packet 8021q garp mrp stp llc netlink_diag target_tatlin_tblock(OEX) dm_ec(OEX) ttln_rdma(OEX) dm_frontend(OEX) nvme_rdma nvmet tcm_qla2xxx iscsi_target_mod target_core_mod at24 nvmem_core pnv_php ipmi_watchdog ipmi_ssif vmx_crypto gf128mul crct10dif_vpmsum qla2xxx rpcrdma nvme_fc powernv_flash(X) nvme_fabrics uio_pdrv_genirq mtd rtc_opal(X) ibmpowernv(X) opal_prd(X) uio scsi_transport_fc i2c_opal(X) ses enclosure ipmi_poweroff ast i2c_algo_bit ttm bmc_mcu(OEX) drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm drm_panel_orientation_quirks agpgart nfsd auth_rpcgss nfs_acl ipmi_powernv(X) lockd ipmi_devintf ipmi_msghandler grace dummy ext4 crc16 jbd2 mbcache sd_mod rdma_ucm ib_iser rdma_cm ib_umad iw_cm ib_ipoib libiscsi scsi_transport_iscsi ib_cm [84010.596975] configfs mlx5_ib ib_uverbs ib_core mlx5_core crc32c_vpmsum xhci_pci xhci_hcd mpt3sas(OEX) tg3 usbcore mlxfw tls raid_class libphy scsi_transport_sas devlink ptp pps_core nvme nvme_core sunrpc dm_mirror dm_region_hash dm_log sg dm_multipath dm_mod scsi_dh_rdac scsi_dh_emc scsi_dh_alua scsi_mod autofs4 [84010.597001] Supported: Yes, External [84010.597004] CPU: 238 PID: 279973 Comm: bash Tainted: G OE 4.12.14-197.29-default #1 SLE15-SP1 [84010.597006] task: c000000a104c0000 task.stack: c000000b52188000 [84010.597007] NIP: d00000001ffd7f78 LR: d00000001ffd7f6c CTR: c0000000001676c0 [84010.597008] REGS: c000000b5218b910 TRAP: 0700 Tainted: G OE (4.12.14-197.29-default) [84010.597008] MSR: 900000010282b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE,TM[E]> [84010.597015] CR: 48242424 XER: 00000000 [84010.597016] CFAR: d00000001ff45d08 SOFTE: 1 GPR00: d00000001ffd7f6c c000000b5218bb90 d00000002001b228 0000000000000102 GPR04: 0000000000000001 0000000000000001 00013d91ed0a5e2d 0000000000000000 GPR08: c000000007793300 0000000000000000 0000000000000000 c000000a086e7818 GPR12: 0000000000002200 c000000007793300 0000000000000000 000000012bc937c0 GPR16: 000000012bbf7ed0 0000000000000000 000000012bc3dd10 0000000000000000 GPR20: 000000012bc4db28 0000010036442810 000000012bc97828 000000012bc96c70 GPR24: 00000100365b1550 0000000000000000 00000100363f3d80 c000000be20d3080 GPR28: c000000bda7eae00 c000000be20db7e8 c000000be20d3778 c000000be20db7e8 [84010.597042] NIP [d00000001ffd7f78] qlt_enable_vha+0x1d0/0x260 [qla2xxx] [84010.597051] LR [d00000001ffd7f6c] qlt_enable_vha+0x1c4/0x260 [qla2xxx] [84010.597051] Call Trace: [84010.597061] [c000000b5218bb90] [d00000001ffd7f6c] qlt_enable_vha+0x1c4/0x260 [qla2xxx] (unreliable) [84010.597064] [c000000b5218bc20] [d000000009820b6c] tcm_qla2xxx_tpg_enable_store+0xc4/0x130 [tcm_qla2xxx] [84010.597067] [c000000b5218bcb0] [d0000000185d0e68] configfs_write_file+0xd0/0x190 [configfs] [84010.597072] [c000000b5218bd00] [c0000000003d0edc] __vfs_write+0x3c/0x1e0 [84010.597074] [c000000b5218bd90] [c0000000003d2ea8] vfs_write+0xd8/0x220 [84010.597076] [c000000b5218bde0] [c0000000003d4ddc] SyS_write+0x6c/0x110 [84010.597079] [c000000b5218be30] [c00000000000b188] system_call+0x3c/0x130 [84010.597080] Instruction dump: [84010.597082] 7d0050a8 7d084b78 7d0051ad 40c2fff4 7fa3eb78 4bf73965 60000000 7fa3eb78 [84010.597086] 4bf6dcd9 60000000 2fa30000 419eff40 <0fe00000> 4bffff38 e95f0058 a12a0180 [84010.597090] ---[ end trace e32abaf6e6fee826 ]--- To reproduce: echo 0x7fffffff > /sys/module/qla2xxx/parameters/logging modprobe target_core_mod modprobe tcm_qla2xxx mkdir /sys/kernel/config/target/qla2xxx mkdir /sys/kernel/config/target/qla2xxx/<port-name> mkdir /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1 echo 1 > /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1/enable echo 0 > /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1/enable echo 1 > /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1/enable SYSTEM START kernel: pid 327:drivers/scsi/qla2xxx/qla_init.c:2174 qla2x00_initialize_adapter(): vha->flags.online 0x0 <...> kernel: pid 327:drivers/scsi/qla2xxx/qla_os.c:3444 qla2x00_probe_one(): vha->flags.online 0x1 echo 1 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:86:a6:2a/tpgt_1/enable kernel: pid 348:drivers/scsi/qla2xxx/qla_init.c:6641 qla2x00_abort_isp_cleanup(): vha->flags.online 0x0, ISP_ABORT_NEEDED 0x0 <...> kernel: pid 348:drivers/scsi/qla2xxx/qla_init.c:6998 qla2x00_restart_isp(): vha->flags.online 0x0 echo 0 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:86:a6:2a/tpgt_1/enable kernel: pid 348:drivers/scsi/qla2xxx/qla_init.c:6641 qla2x00_abort_isp_cleanup(): vha->flags.online 0x0, ISP_ABORT_NEEDED 0x0 <...> kernel: pid 1404:drivers/scsi/qla2xxx/qla_os.c:1107 qla2x00_wait_for_hba_online(): base_vha->flags.online 0x0 echo 1 > /sys/kernel/config/target/qla2xxx/21:00:00:24:ff:86:a6:2a/tpgt_1/enable kernel: pid 1404:drivers/scsi/qla2xxx/qla_os.c:1107 qla2x00_wait_for_hba_online(): base_vha->flags.online 0x0 kernel: -----------[ cut here ]----------- kernel: WARNING: CPU: 1 PID: 1404 at drivers/scsi/qla2xxx/qla_target.c:6654 qlt_enable_vha+0x1e0/0x280 [qla2xxx] The issue happens because no real ISP reset is executed. The qla2x00_abort_isp(scsi_qla_host_t *vha) function expects that vha->flags.online will be not zero for ISP reset procedure. This patch sets vha->flags.online to 1 before calling ->abort_isp() for starting the ISP reset. Link: https://lore.kernel.org/r/1d7b21bf9f7676643239eb3d60eaca7cfa505cf0.camel@yadro.comReviewed-by: -
Hannes Reinecke authored
Leftover from cmd_list removal. Link: https://lore.kernel.org/r/20200507062642.100612-1-hare@suse.de Fixes: c5a97076 ("scsi: core: Remove cmd_list functionality") Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Damien Le Moal authored
Allowing a non-power-of-2 zone size forces the use of direct division operations of 64-bit sector values to obtain a zone number or number of zones. Doing so without using do_div() leads to compilation errors on 32-bit architectures. Devices with a zone size that is not a power of 2 do not exist today so allowing their emulation is of limited interest as the sd driver will not support them anyway. To fix this compilation error, instead of using do_div() for sector values divisions, simply disallow zone size values that are not a power of 2. [mkp: commit desc] Link: https://lore.kernel.org/r/20200507023526.221574-1-damien.lemoal@wdc.com Fixes: 98e0a689 ("scsi: scsi_debug: Add zone_size_mb module parameter") Fixes: f0d1cf93 ("scsi: scsi_debug: Add ZBC zone commands") Reviewed-by:
Johannes Thumshirn <johannes.thumshirn@wdc.com> Acked-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by:
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- 05 May, 2020 14 commits
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Damien Le Moal authored
Implement ZBC host-aware device model emulation. The main changes from the host-managed emulation are the device type (TYPE_DISK is used), relaxation of access checks for read and write operations and different handling of a sequential write preferred zone write pointer as mandated by the ZBC r05 specifications. To facilitate the implementation and avoid a lot of "if" statement, the zmodel field is added to the device information and the z_type field to the zone state data structure. Link: https://lore.kernel.org/r/20200422104221.378203-8-damien.lemoal@wdc.comTested-by:
Douglas Gilbert <dgilbert@interlog.com> Signed-off-by:
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Damien Le Moal authored
Add the zone_size_mb module parameters to control the zone size of a ZBC device. If the zone size specified is not a divisor of the device capacity, the last zone of the device will be created as a smaller "runt" zone. This parameter is ignored for device types other than 0x14 (zbc=2 case). Note: for testing purposes, zone sizes that are not a power of 2 are accepted but will result in the drive being rejected by the sd driver. Link: https://lore.kernel.org/r/20200422104221.378203-7-damien.lemoal@wdc.comSigned-off-by:
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Damien Le Moal authored
Allow controlling the number of conventional zones of a ZBC device with the new zone_nr_conv module parameter. The default value is 1 and the specified value must be less than the total number of zones of the device. This parameter is ignored for device types other than 0x14 (zbc=2 case). Link: https://lore.kernel.org/r/20200422104221.378203-6-damien.lemoal@wdc.comSigned-off-by:
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Damien Le Moal authored
Add the zone_max_open module parameters to control the maximum number of open zones of a ZBC device. This parameter is ignored for device types other than 0x14 (zbc=2 case). Link: https://lore.kernel.org/r/20200422104221.378203-5-damien.lemoal@wdc.comSigned-off-by:
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Douglas Gilbert authored
Add the zbc module parameter to take either: 0: none (probably a conventional disk) 1: host-aware 2: host-managed These values are chosen to match 'enum blk_zoned_model' found in include/linux/blkdev.h . Instead of "none", "no" or "0" can be given. Instead of "host-aware", "aware or "1" can be given. Instead of "host-managed", "managed" or "2" can be given. Note: the zbc parameter can only be given at driver/module load time; it cannot be changed via sysfs thereafter. At this time there is no ZBC "host-aware" implementation so that string (or the value '1') results in a modprobe error. Link: https://lore.kernel.org/r/20200422104221.378203-4-damien.lemoal@wdc.comSigned-off-by: -
Douglas Gilbert authored
Add support for the 5 ZBC commands and enough functionality to emulate a host-managed device with one conventional zone and a set of sequential write-required zones up to the disk capacity. Link: https://lore.kernel.org/r/20200422104221.378203-3-damien.lemoal@wdc.comSigned-off-by:
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Douglas Gilbert authored
The ZBC standard "piggy-backs" on many, but not all, of the facilities in SBC. Add those ZBC mode pages (plus mode parameter block descriptors (e.g. "WP")) and VPD pages in common with SBC. Add ZBC specific VPD page for the host-managed ZBC device type (ptype=0x14). Link: https://lore.kernel.org/r/20200422104221.378203-2-damien.lemoal@wdc.comSigned-off-by:
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Douglas Gilbert authored
The scsi_debug driver version is visible in: /sys/modules/scsi_debug/version and can thus be used by user space programs to alter the features they try to use. Since the per_host_store and zbc/zone options are significant additions, bump the version number to 1.89 . Link: https://lore.kernel.org/r/20200421151424.32668-9-dgilbert@interlog.comSigned-off-by:
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Douglas Gilbert authored
This module has a lot of parameters and when searching for one, the author prefers them in alphabetical order. This can lead to somewhat illogical ordering (e.g. inq_product before inq_vendor). However it is not clear what another sensible total logical ordering would be. Link: https://lore.kernel.org/r/20200421151424.32668-8-dgilbert@interlog.comSigned-off-by:
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Douglas Gilbert authored
Many disks implement the SCSI PRE-FETCH commands. One use case might be a disk-to-disk compare, say between disks A and B. Then this sequence of commands might be used: PRE-FETCH(from B, IMMED), READ(from A), VERIFY (BYTCHK=1 on B with data returned from READ). The PRE-FETCH (which returns quickly due to the IMMED) fetches the data from the media into B's cache which should speed the trailing VERIFY command. The next chunk of the compare might be done in parallel, with A and B reversed. The implementation tries to bring the specified range in main memory into the cache(s) associated with this machine's CPU(s) using the prefetch_range() function. Link: https://lore.kernel.org/r/20200421151424.32668-7-dgilbert@interlog.comSigned-off-by:
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Douglas Gilbert authored
Previously the code did the work implied by the given SCSI command and after that it waited for a timer based on the user specified command duration to be exhausted before informing the mid-level that the command was complete. For short command durations, the time to complete the work implied by the SCSI command could be significant compared to the user specified command duration. For example a WRITE of 128 blocks (say 512 bytes each) on a machine that can copy from main memory to main memory at a rate of 10 GB/sec will take around 6.4 microseconds to do that copy. If the user specified a command duration of 5 microseconds (ndelay=5000), should the driver do a further delay of 5 microseconds after the copy or return immediately because 6.4 > 5 ? The action prior to this patch was to always do the timer based delay. After this patch, for ndelay values less than 1 millisecond, this driver will complete the command immediately. And in the case where the user specified delay was 7 microseconds, a timer delay of 600 nanoseconds will be set ((7 - 6.4) * 1000). Link: https://lore.kernel.org/r/20200421151424.32668-6-dgilbert@interlog.comSigned-off-by:
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Douglas Gilbert authored
The design of this driver is to do any ramdisk access on the same thread that invoked the queuecommand() call. That is assumed to be user space context. The command duration is implemented by setting the delay with a high resolution timer. The hr timer's callback may well be in interrupt context, but it doesn't touch the ramdisk. So try removing the _irqsave()/_irqrestore() portion on the read-write lock that protects ramdisk access. Link: https://lore.kernel.org/r/20200421151424.32668-5-dgilbert@interlog.comSigned-off-by:
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Douglas Gilbert authored
With the addition of the per_host_store option, the ability to check whether two different ramdisk images are the same or not becomes practical. Prior to this patch VERIFY(10) always returned true (i.e. the SCSI GOOD status) without checking. This option adds support for BYTCHK equal to 0, 1 and 3. If the comparison fails, then a sense key of MISCOMPARE is returned as per the T10 standards. Also add support for the VERIFY(16) command. Link: https://lore.kernel.org/r/20200421151424.32668-4-dgilbert@interlog.comReviewed-by:
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Douglas Gilbert authored
The scsi_debug driver has always been restricted to using one ramdisk image (or none) for its storage. This means that thousands of scsi_debug devices can be created without exhausting the host machine's RAM. The downside is that all scsi_debug devices share the same ramdisk image. This option changes the way a following write to the add_host parameter (or an add_host in the module/driver invocation) operates. For each new host that is created while per_host_store is true, a new store (of dev-size_mb MiB) is created and associated with all the LUs that belong to that new host. The user (who will need root permissions) needs to take care not to exhaust all the machine's available RAM. One reason for doing this is to check that (partial) disk to disk copies based on scsi_debug devices have actually copied accurately. To test this the add_host=<n> parameter where <n> is 2 or greater can be used when the scsi_debug module is loaded. Let us assume that /dev/sdb and /dev/sg1 are the same scsi_debug device, while /dev/sdc and /dev/sg2 are the same scsi_debug device. With per_host_store=1 add_host=2 they will have different ramdisk images. Then the following pseudocode could be executed to check if the sgh_dd copy worked: dd if=/dev/urandom of=/dev/sdb sgh_dd if=/dev/sg1 of=/dev/sg2 [plus option(s) to test] cmp /dev/sdb /dev/sdc If the cmp fails then the copy has failed (or some other mechanism wrote to /dev/sdb or /dev/sdc in the interim). [mkp: use kstrtobool()] Link: https://lore.kernel.org/r/20200421151424.32668-3-dgilbert@interlog.comSigned-off-by:
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