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scsi: add persistent reservation in with read reservations support

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Change-Id: I5345207a6331889182324ae3231bb62c84b69d69
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/436094
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
This commit is contained in:
Changpeng Liu 2019-05-14 01:40:13 -04:00 committed by Jim Harris
parent 4e9e220e7c
commit 2b09903c2c
1 changed files with 38 additions and 0 deletions
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38
lib/scsi/scsi_pr.c
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@ -586,6 +586,38 @@ spdk_scsi_pr_in_read_keys(struct spdk_scsi_task *task, uint8_t *data,
return (sizeof(keys->header) + count * 8);
}
static int
spdk_scsi_pr_in_read_reservations(struct spdk_scsi_task *task,
uint8_t *data, uint16_t data_len)
{
struct spdk_scsi_lun *lun = task->lun;
struct spdk_scsi_pr_in_read_reservations_data *param;
bool all_regs = false;
SPDK_DEBUGLOG(SPDK_LOG_SCSI, "PR IN READ RESERVATIONS\n");
param = (struct spdk_scsi_pr_in_read_reservations_data *)(data);
to_be32(&param->header.pr_generation, lun->pr_generation);
if (lun->reservation.holder) {
all_regs = spdk_scsi_pr_is_all_registrants_type(lun);
if (all_regs) {
to_be64(&param->rkey, 0);
} else {
to_be64(&param->rkey, lun->reservation.crkey);
}
to_be32(&param->header.addiontal_len, 16);
param->scope = SPDK_SCSI_PR_LU_SCOPE;
param->type = lun->reservation.rtype;
SPDK_DEBUGLOG(SPDK_LOG_SCSI, "READ RESERVATIONS with valid reservation\n");
return sizeof(*param);
}
/* no reservation */
to_be32(&param->header.addiontal_len, 0);
SPDK_DEBUGLOG(SPDK_LOG_SCSI, "READ RESERVATIONS no reservation\n");
return sizeof(param->header);
}
int
spdk_scsi_pr_in(struct spdk_scsi_task *task,
uint8_t *cdb, uint8_t *data,
@ -603,6 +635,12 @@ spdk_scsi_pr_in(struct spdk_scsi_task *task,
case SPDK_SCSI_PR_IN_READ_KEYS:
rc = spdk_scsi_pr_in_read_keys(task, data, data_len);
break;
case SPDK_SCSI_PR_IN_READ_RESERVATION:
if (data_len < sizeof(struct spdk_scsi_pr_in_read_reservations_data)) {
goto invalid;
}
rc = spdk_scsi_pr_in_read_reservations(task, data, data_len);
break;
default:
goto invalid;
}