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ctl: Add helper routines to populate NVMe namespace data IDs for a LUN

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These will be used by the backends to populate the unique ID fields
like EUI64 in the NVMe namespace data (CNS == 0) and namespace
identification descriptor list (CNS == 3).

Reviewed by:	imp
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D44721
This commit is contained in:
John Baldwin 2024-05-02 16:32:41 -07:00
parent 0c4ee619df
commit bef5da8ebf
2 changed files with 96 additions and 0 deletions
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85
sys/cam/ctl/ctl.c
View file

@ -4956,6 +4956,91 @@ ctl_lun_capacity_changed(struct ctl_be_lun *be_lun)
}
}
void
ctl_lun_nsdata_ids(struct ctl_be_lun *be_lun,
struct nvme_namespace_data *nsdata)
{
struct ctl_lun *lun = (struct ctl_lun *)be_lun->ctl_lun;
struct scsi_vpd_id_descriptor *idd;
if (lun->lun_devid == NULL)
return;
idd = scsi_get_devid_desc((struct scsi_vpd_id_descriptor *)
lun->lun_devid->data, lun->lun_devid->len, scsi_devid_is_lun_naa);
if (idd != NULL) {
if (idd->length == 16) {
memcpy(nsdata->nguid, idd->identifier, 16);
return;
}
if (idd->length == 8) {
memcpy(nsdata->eui64, idd->identifier, 8);
return;
}
}
idd = scsi_get_devid_desc((struct scsi_vpd_id_descriptor *)
lun->lun_devid->data, lun->lun_devid->len, scsi_devid_is_lun_eui64);
if (idd != NULL) {
if (idd->length == 8) {
memcpy(nsdata->eui64, idd->identifier, 8);
return;
}
}
}
void
ctl_lun_nvme_ids(struct ctl_be_lun *be_lun, void *data)
{
struct ctl_lun *lun = (struct ctl_lun *)be_lun->ctl_lun;
struct scsi_vpd_id_descriptor *naa, *eui64, *uuid;
char *p;
memset(data, 0, 4096);
if (lun->lun_devid == NULL)
return;
naa = scsi_get_devid_desc((struct scsi_vpd_id_descriptor *)
lun->lun_devid->data, lun->lun_devid->len, scsi_devid_is_lun_naa);
eui64 = scsi_get_devid_desc((struct scsi_vpd_id_descriptor *)
lun->lun_devid->data, lun->lun_devid->len, scsi_devid_is_lun_eui64);
uuid = scsi_get_devid_desc((struct scsi_vpd_id_descriptor *)
lun->lun_devid->data, lun->lun_devid->len, scsi_devid_is_lun_uuid);
p = data;
/* EUI64 */
if ((naa != NULL && naa->length == 8) || eui64 != NULL) {
*p++ = 1;
*p++ = 8;
p += 2;
if (naa != NULL && naa->length == 8)
memcpy(p, naa->identifier, 8);
else
memcpy(p, eui64->identifier, 8);
p += 8;
}
/* NGUID */
if (naa != NULL && naa->length == 16) {
*p++ = 1;
*p++ = 16;
p += 2;
memcpy(p, naa->identifier, 16);
p += 16;
}
/* UUID */
if (uuid != NULL) {
*p++ = 1;
*p++ = uuid->length;
p += 2;
memcpy(p, uuid->identifier, uuid->length);
p += uuid->length;
}
}
/*
* Backend "memory move is complete" callback for requests that never
* make it down to say RAIDCore's configuration code.

11
sys/cam/ctl/ctl_backend.h
View file

@ -242,6 +242,17 @@ int ctl_lun_secondary(struct ctl_be_lun *be_lun);
*/
void ctl_lun_capacity_changed(struct ctl_be_lun *be_lun);
/*
* Populate unique ID fields in NVMe namespace data for a LUN.
*/
void ctl_lun_nsdata_ids(struct ctl_be_lun *be_lun,
struct nvme_namespace_data *nsdata);
/*
* Populate the NVMe namespace identification descriptor list for a LUN.
*/
void ctl_lun_nvme_ids(struct ctl_be_lun *be_lun, void *data);
#endif /* _KERNEL */
#endif /* _CTL_BACKEND_H_ */