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Make nvd(4) report NGUID or EUI64 as GEOM::lunid.

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With support for multiple namespaces and multiple ports in NVMe there is
now a need for reliable unique namespace identification alike to SCSI.

MFC after:	1 weeks
Sponsored by:	iXsystems, Inc.
This commit is contained in:
Alexander Motin 2019-08-13 21:49:07 +00:00
parent e28024fbad
commit 443b0ad786
1 changed files with 43 additions and 0 deletions
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43
sys/dev/nvd/nvd.c
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@ -54,6 +54,7 @@ struct nvd_controller;
static disk_ioctl_t nvd_ioctl;
static disk_strategy_t nvd_strategy;
static dumper_t nvd_dump;
static disk_getattr_t nvd_getattr;
static void nvd_done(void *arg, const struct nvme_completion *cpl);
static void nvd_gone(struct nvd_disk *ndisk);
@ -294,6 +295,47 @@ nvd_dump(void *arg, void *virt, vm_offset_t phys, off_t offset, size_t len)
return (nvme_ns_dump(ndisk->ns, virt, offset, len));
}
static int
nvd_getattr(struct bio *bp)
{
struct nvd_disk *ndisk = (struct nvd_disk *)bp->bio_disk->d_drv1;
const struct nvme_namespace_data *nsdata;
u_int i;
if (!strcmp("GEOM::lunid", bp->bio_attribute)) {
nsdata = nvme_ns_get_data(ndisk->ns);
/* Try to return NGUID as lunid. */
for (i = 0; i < sizeof(nsdata->nguid); i++)
if (nsdata->nguid[i] != 0)
if (i < sizeof(nsdata->nguid)) {
if (bp->bio_length < sizeof(nsdata->nguid) * 2 + 1)
return (EFAULT);
for (i = 0; i < sizeof(nsdata->nguid); i++) {
sprintf(&bp->bio_data[i * 2], "%02x",
nsdata->nguid[i]);
}
bp->bio_completed = bp->bio_length;
return (0);
}
/* Try to return EUI64 as lunid. */
for (i = 0; i < sizeof(nsdata->eui64); i++)
if (nsdata->eui64[i] != 0)
if (i < sizeof(nsdata->eui64)) {
if (bp->bio_length < sizeof(nsdata->eui64) * 2 + 1)
return (EFAULT);
for (i = 0; i < sizeof(nsdata->eui64); i++) {
sprintf(&bp->bio_data[i * 2], "%02x",
nsdata->eui64[i]);
}
bp->bio_completed = bp->bio_length;
return (0);
}
}
return (-1);
}
static void
nvd_done(void *arg, const struct nvme_completion *cpl)
{
@ -403,6 +445,7 @@ nvd_new_disk(struct nvme_namespace *ns, void *ctrlr_arg)
disk->d_strategy = nvd_strategy;
disk->d_ioctl = nvd_ioctl;
disk->d_dump = nvd_dump;
disk->d_getattr = nvd_getattr;
disk->d_gone = nvd_gonecb;
disk->d_name = NVD_STR;
disk->d_unit = ndisk->unit;