| Message ID | 7d31722a7e07bc24ea37b5841a17545003eeddb4.1658195608.git.Thinh.Nguyen@synopsys.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2,1/4] target: Handle MI_REPORT_SUPPORTED_OPERATION_CODES | expand |
On 7/18/22 9:07 PM, Thinh Nguyen wrote: > Task ABORT TASK SET function is required by SCSI transport protocol What OS is using this and how do they use it? For the latter, does the OS try an abort for each cmd first, then try an abort task set if the aborts fail (does fail mean get a response that indicates failure and also does a timeout count)? Or does it start with the abort task set? I'm asking because it looks like if it does an abort first, then the abort task set will always return TMR_TASK_DOES_NOT_EXIST. For the abort we will remove the cmds from the state_list so if the abort task set runs after the initiator has tried to abort all the commands it will never find any. > standards (SAM-4 r14 section 7.3). It is similar to ABORT TASK > function, but it applies to all commands received on a specified I_T > nexus rather than a specific referenced command. Modify > core_tmr_abort_task() to support TMR_ABORT_TASK_SET. >
On 7/19/2022, Mike Christie wrote: > On 7/18/22 9:07 PM, Thinh Nguyen wrote: >> Task ABORT TASK SET function is required by SCSI transport protocol > What OS is using this and how do they use it? For the latter, does the > OS try an abort for each cmd first, then try an abort task set if the > aborts fail (does fail mean get a response that indicates failure and > also does a timeout count)? Or does it start with the abort task set? It's not from any real driver. It's from the USB Compliant Verification (https://www.usb.org/document-library/usb3cv). It uses the command for UASP compliant test. The test only ever aborts a single command at a time, so I can't confirm your following questions. The SAM4-r14 wasn't clear on those questions either. > I'm asking because it looks like if it does an abort first, then the > abort task set will always return TMR_TASK_DOES_NOT_EXIST. For the abort > we will remove the cmds from the state_list so if the abort task set runs > after the initiator has tried to abort all the commands it will never > find any. I didn't notice since I dropped a patch where I removed the TMR_TASK_DOES_NOT_EXIST and UASP converts this to RC_TMF_COMPLETE. UASP respond to FUNCTION COMPLETE with RC_TMF_COMPLETE. I'll can make a fix to that. If there's any suggestion to implement this, please advise. Thanks, Thinh >> standards (SAM-4 r14 section 7.3). It is similar to ABORT TASK >> function, but it applies to all commands received on a specified I_T >> nexus rather than a specific referenced command. Modify >> core_tmr_abort_task() to support TMR_ABORT_TASK_SET. >>
On Tue, Jul 19, 2022 at 10:56:07AM -0500, Mike Christie wrote: > «Внимание! Данное письмо от внешнего адресата!» > > On 7/18/22 9:07 PM, Thinh Nguyen wrote: > > Task ABORT TASK SET function is required by SCSI transport protocol > > What OS is using this and how do they use it? For the latter, does the > OS try an abort for each cmd first, then try an abort task set if the > aborts fail (does fail mean get a response that indicates failure and > also does a timeout count)? Or does it start with the abort task set? AIX IIRC. However, this feature also requires valid bits in one of the VPD pages.
diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c index bac111456fa1..1ea72e15f872 100644 --- a/drivers/target/target_core_tmr.c +++ b/drivers/target/target_core_tmr.c @@ -131,11 +131,13 @@ void core_tmr_abort_task( continue; ref_tag = se_cmd->tag; - if (tmr->ref_task_tag != ref_tag) - continue; + if (tmr->function == TMR_ABORT_TASK) { + if (tmr->ref_task_tag != ref_tag) + continue; - pr_err("ABORT_TASK: Found referenced %s task_tag: %llu\n", - se_cmd->se_tfo->fabric_name, ref_tag); + pr_err("ABORT_TASK: Found referenced %s task_tag: %llu\n", + se_cmd->se_tfo->fabric_name, ref_tag); + } spin_lock(&se_sess->sess_cmd_lock); rc = __target_check_io_state(se_cmd, se_sess, 0); @@ -158,7 +160,11 @@ void core_tmr_abort_task( ref_tag); tmr->response = TMR_FUNCTION_COMPLETE; atomic_long_inc(&dev->aborts_complete); - return; + + if (tmr->function == TMR_ABORT_TASK) + return; + + spin_lock_irqsave(&dev->queues[i].lock, flags); } spin_unlock_irqrestore(&dev->queues[i].lock, flags); } diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 7838dc20f713..8c386142ef90 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -3519,9 +3519,9 @@ static void target_tmr_work(struct work_struct *work) switch (tmr->function) { case TMR_ABORT_TASK: + case TMR_ABORT_TASK_SET: core_tmr_abort_task(dev, tmr, cmd->se_sess); break; - case TMR_ABORT_TASK_SET: case TMR_CLEAR_ACA: case TMR_CLEAR_TASK_SET: tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED;
Task ABORT TASK SET function is required by SCSI transport protocol standards (SAM-4 r14 section 7.3). It is similar to ABORT TASK function, but it applies to all commands received on a specified I_T nexus rather than a specific referenced command. Modify core_tmr_abort_task() to support TMR_ABORT_TASK_SET. Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> --- Changes in v2: - None drivers/target/target_core_tmr.c | 16 +++++++++++----- drivers/target/target_core_transport.c | 2 +- 2 files changed, 12 insertions(+), 6 deletions(-)