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scsi: add persistent reservation out command with clear service action support

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Any application client can release the persistent reservation and remove all
registrations from a device server by issuing a PERSISTENT RESERVE OUT command
with CLEAR service action through a registered I_T nexus.

Change-Id: Ie21885f7f9632b9da77e877fbce7c51b2e0b47a7
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/436091
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Changpeng Liu 2019-05-14 01:16:23 -04:00 committed by Jim Harris
parent e8e791f7b5
commit 8d79b4109f
1 changed files with 40 additions and 0 deletions
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40
lib/scsi/scsi_pr.c
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@ -340,6 +340,43 @@ check_condition:
return -EINVAL;
}
static int
spdk_scsi_pr_out_clear(struct spdk_scsi_task *task, uint64_t rkey)
{
struct spdk_scsi_lun *lun = task->lun;
struct spdk_scsi_pr_registrant *reg, *tmp;
int sc, sk, asc;
SPDK_DEBUGLOG(SPDK_LOG_SCSI, "PR OUT CLEAR: rkey 0x%"PRIx64"\n", rkey);
reg = spdk_scsi_pr_get_registrant(lun, task->initiator_port, task->target_port);
if (!reg) {
SPDK_ERRLOG("No registration\n");
sc = SPDK_SCSI_STATUS_CHECK_CONDITION;
sk = SPDK_SCSI_SENSE_NOT_READY;
asc = SPDK_SCSI_ASC_NO_ADDITIONAL_SENSE;
goto error_exit;
}
if (rkey != reg->rkey) {
SPDK_ERRLOG("Reservation key 0x%"PRIx64" doesn't match "
"registrant's key 0x%"PRIx64"\n", rkey, reg->rkey);
sc = SPDK_SCSI_STATUS_RESERVATION_CONFLICT;
sk = SPDK_SCSI_SENSE_NO_SENSE;
asc = SPDK_SCSI_ASC_NO_ADDITIONAL_SENSE;
goto error_exit;
}
TAILQ_FOREACH_SAFE(reg, &lun->reg_head, link, tmp) {
spdk_scsi_pr_unregister_registrant(lun, reg);
}
return 0;
error_exit:
spdk_scsi_task_set_status(task, sc, sk, asc, SPDK_SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
return -EINVAL;
}
int
spdk_scsi_pr_out(struct spdk_scsi_task *task,
@ -383,6 +420,9 @@ spdk_scsi_pr_out(struct spdk_scsi_task *task,
}
rc = spdk_scsi_pr_out_release(task, rtype, rkey);
break;
case SPDK_SCSI_PR_OUT_CLEAR:
rc = spdk_scsi_pr_out_clear(task, rkey);
break;
default:
SPDK_ERRLOG("Invalid service action code %u\n", action);
goto invalid;