git: 374f12c52f1b - main - ctl_backend_block: Add support for NVMe
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Date: Fri, 03 May 2024 00:16:06 UTC
The branch main has been updated by jhb:
URL: https://cgit.FreeBSD.org/src/commit/?id=374f12c52f1b757cde427a1e05b0caae6c954403
commit 374f12c52f1b757cde427a1e05b0caae6c954403
Author: John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2024-05-02 23:34:16 +0000
Commit: John Baldwin <jhb@FreeBSD.org>
CommitDate: 2024-05-02 23:38:30 +0000
ctl_backend_block: Add support for NVMe
Reviewed by: imp
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D44723
---
sys/cam/ctl/ctl_backend_block.c | 472 +++++++++++++++++++++++++++++++++++++---
1 file changed, 444 insertions(+), 28 deletions(-)
diff --git a/sys/cam/ctl/ctl_backend_block.c b/sys/cam/ctl/ctl_backend_block.c
index 1cb833c3868c..714ed57b5652 100644
--- a/sys/cam/ctl/ctl_backend_block.c
+++ b/sys/cam/ctl/ctl_backend_block.c
@@ -119,6 +119,7 @@
((struct ctl_ptr_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_BACKEND])
#define ARGS(io) \
((struct ctl_lba_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_LBA_LEN])
+#define DSM_RANGE(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].integer)
SDT_PROVIDER_DEFINE(cbb);
@@ -819,6 +820,8 @@ ctl_be_block_gls_file(struct ctl_be_block_lun *be_lun,
DPRINTF("entered\n");
+ CTL_IO_ASSERT(io, SCSI);
+
off = roff = ((off_t)lbalen->lba) * be_lun->cbe_lun.blocksize;
vn_lock(be_lun->vn, LK_SHARED | LK_RETRY);
error = VOP_IOCTL(be_lun->vn, FIOSEEKHOLE, &off,
@@ -1069,6 +1072,8 @@ ctl_be_block_gls_zvol(struct ctl_be_block_lun *be_lun,
DPRINTF("entered\n");
+ CTL_IO_ASSERT(io, SCSI);
+
csw = devvn_refthread(be_lun->vn, &dev, &ref);
if (csw == NULL) {
status = 0; /* unknown up to the end */
@@ -1323,6 +1328,39 @@ ctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun, const char *attrname)
return (arg.value.off);
}
+static void
+ctl_be_block_namespace_data(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
+{
+ struct ctl_be_lun *cbe_lun = &be_lun->cbe_lun;
+ struct nvme_namespace_data *nsdata;
+
+ nsdata = (struct nvme_namespace_data *)io->nvmeio.kern_data_ptr;
+ memset(nsdata, 0, sizeof(*nsdata));
+ nsdata->nsze = htole64(be_lun->size_blocks);
+ nsdata->ncap = nsdata->nsze;
+ nsdata->nuse = nsdata->nuse;
+ nsdata->nlbaf = 1 - 1;
+ nsdata->dlfeat = NVMEM(NVME_NS_DATA_DLFEAT_DWZ) |
+ NVMEF(NVME_NS_DATA_DLFEAT_READ, NVME_NS_DATA_DLFEAT_READ_00);
+ nsdata->flbas = NVMEF(NVME_NS_DATA_FLBAS_FORMAT, 0);
+ nsdata->lbaf[0] = NVMEF(NVME_NS_DATA_LBAF_LBADS,
+ ffs(cbe_lun->blocksize) - 1);
+
+ ctl_lun_nsdata_ids(cbe_lun, nsdata);
+ ctl_config_read_done(io);
+}
+
+static void
+ctl_be_block_nvme_ids(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
+{
+ struct ctl_be_lun *cbe_lun = &be_lun->cbe_lun;
+
+ ctl_lun_nvme_ids(cbe_lun, io->nvmeio.kern_data_ptr);
+ ctl_config_read_done(io);
+}
+
static void
ctl_be_block_cw_dispatch_sync(struct ctl_be_block_lun *be_lun,
union ctl_io *io)
@@ -1376,6 +1414,8 @@ ctl_be_block_cw_dispatch_ws(struct ctl_be_block_lun *be_lun,
DPRINTF("entered\n");
+ CTL_IO_ASSERT(io, SCSI);
+
beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
lbalen = ARGS(io);
@@ -1466,13 +1506,15 @@ ctl_be_block_cw_dispatch_ws(struct ctl_be_block_lun *be_lun,
static void
ctl_be_block_cw_dispatch_unmap(struct ctl_be_block_lun *be_lun,
- union ctl_io *io)
+ union ctl_io *io)
{
struct ctl_be_block_io *beio;
struct ctl_ptr_len_flags *ptrlen;
DPRINTF("entered\n");
+ CTL_IO_ASSERT(io, SCSI);
+
beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN];
@@ -1497,7 +1539,187 @@ ctl_be_block_cw_dispatch_unmap(struct ctl_be_block_lun *be_lun,
}
static void
-ctl_be_block_cr_done(struct ctl_be_block_io *beio)
+ctl_be_block_cw_dispatch_flush(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
+{
+ struct ctl_be_block_io *beio;
+
+ DPRINTF("entered\n");
+ beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
+
+ beio->io_len = be_lun->size_bytes;
+ beio->io_offset = 0;
+ beio->io_arg = 1;
+ beio->bio_cmd = BIO_FLUSH;
+ beio->ds_trans_type = DEVSTAT_NO_DATA;
+ DPRINTF("FLUSH\n");
+ be_lun->lun_flush(be_lun, beio);
+}
+
+static void
+ctl_be_block_cw_dispatch_wu(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
+{
+ struct ctl_be_lun *cbe_lun = &be_lun->cbe_lun;
+ struct ctl_be_block_io *beio;
+ struct ctl_lba_len_flags *lbalen;
+
+ CTL_IO_ASSERT(io, NVME);
+
+ beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
+ lbalen = ARGS(io);
+
+ /*
+ * XXX: Not quite right as reads will return zeroes rather
+ * than failing.
+ */
+ beio->io_offset = lbalen->lba * cbe_lun->blocksize;
+ beio->io_len = (uint64_t)lbalen->len * cbe_lun->blocksize;
+ beio->bio_cmd = BIO_DELETE;
+ beio->ds_trans_type = DEVSTAT_FREE;
+
+ be_lun->unmap(be_lun, beio);
+}
+
+static void
+ctl_be_block_cw_dispatch_wz(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
+{
+ struct ctl_be_block_softc *softc = be_lun->softc;
+ struct ctl_be_lun *cbe_lun = &be_lun->cbe_lun;
+ struct ctl_be_block_io *beio;
+ struct ctl_lba_len_flags *lbalen;
+ uint64_t len_left, lba;
+ uint32_t pb, pbo, adj;
+ int i, seglen;
+
+ DPRINTF("entered\n");
+
+ CTL_IO_ASSERT(io, NVME);
+
+ beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
+ lbalen = ARGS(io);
+
+ if ((le32toh(io->nvmeio.cmd.cdw12) & (1U << 25)) != 0 &&
+ be_lun->unmap != NULL) {
+ beio->io_offset = lbalen->lba * cbe_lun->blocksize;
+ beio->io_len = (uint64_t)lbalen->len * cbe_lun->blocksize;
+ beio->bio_cmd = BIO_DELETE;
+ beio->ds_trans_type = DEVSTAT_FREE;
+
+ be_lun->unmap(be_lun, beio);
+ return;
+ }
+
+ beio->bio_cmd = BIO_WRITE;
+ beio->ds_trans_type = DEVSTAT_WRITE;
+
+ DPRINTF("WRITE ZEROES at LBA %jx len %u\n",
+ (uintmax_t)lbalen->lba, lbalen->len);
+
+ pb = cbe_lun->blocksize << be_lun->cbe_lun.pblockexp;
+ if (be_lun->cbe_lun.pblockoff > 0)
+ pbo = pb - cbe_lun->blocksize * be_lun->cbe_lun.pblockoff;
+ else
+ pbo = 0;
+ len_left = (uint64_t)lbalen->len * cbe_lun->blocksize;
+ for (i = 0, lba = 0; i < CTLBLK_MAX_SEGS && len_left > 0; i++) {
+ /*
+ * Setup the S/G entry for this chunk.
+ */
+ seglen = MIN(CTLBLK_MAX_SEG, len_left);
+ if (pb > cbe_lun->blocksize) {
+ adj = ((lbalen->lba + lba) * cbe_lun->blocksize +
+ seglen - pbo) % pb;
+ if (seglen > adj)
+ seglen -= adj;
+ else
+ seglen -= seglen % cbe_lun->blocksize;
+ } else
+ seglen -= seglen % cbe_lun->blocksize;
+ ctl_alloc_seg(softc, &beio->sg_segs[i], seglen);
+
+ DPRINTF("segment %d addr %p len %zd\n", i,
+ beio->sg_segs[i].addr, beio->sg_segs[i].len);
+
+ beio->num_segs++;
+ len_left -= seglen;
+
+ memset(beio->sg_segs[i].addr, 0, seglen);
+ lba += seglen / cbe_lun->blocksize;
+ }
+
+ beio->io_offset = lbalen->lba * cbe_lun->blocksize;
+ beio->io_len = lba * cbe_lun->blocksize;
+
+ /* We can not do all in one run. Correct and schedule rerun. */
+ if (len_left > 0) {
+ lbalen->lba += lba;
+ lbalen->len -= lba;
+ beio->beio_cont = ctl_be_block_cw_done_ws;
+ }
+
+ be_lun->dispatch(be_lun, beio);
+}
+
+static void
+ctl_be_block_cw_dispatch_dsm(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
+{
+ struct ctl_be_lun *cbe_lun = &be_lun->cbe_lun;
+ struct ctl_be_block_io *beio;
+ struct nvme_dsm_range *r;
+ uint64_t lba;
+ uint32_t num_blocks;
+ u_int i, ranges;
+
+ CTL_IO_ASSERT(io, NVME);
+
+ beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
+
+ if (be_lun->unmap == NULL) {
+ ctl_free_beio(beio);
+ ctl_nvme_set_success(&io->nvmeio);
+ ctl_config_write_done(io);
+ return;
+ }
+
+ ranges = le32toh(io->nvmeio.cmd.cdw10) & 0xff;
+ r = (struct nvme_dsm_range *)io->nvmeio.kern_data_ptr;
+
+ /* Find the next range to delete. */
+ for (i = DSM_RANGE(io); i < ranges; i++) {
+ if ((le32toh(r[i].attributes) & (1U << 2)) != 0)
+ break;
+ }
+
+ /* If no range to delete, complete the operation. */
+ if (i == ranges) {
+ ctl_free_beio(beio);
+ ctl_nvme_set_success(&io->nvmeio);
+ ctl_config_write_done(io);
+ return;
+ }
+
+ /* If this is not the last range, request a rerun after this range. */
+ if (i + 1 < ranges) {
+ DSM_RANGE(io) = i + 1;
+ beio->beio_cont = ctl_be_block_cw_done_ws;
+ }
+
+ lba = le64toh(r[i].starting_lba);
+ num_blocks = le32toh(r[i].length);
+
+ beio->io_offset = lba * cbe_lun->blocksize;
+ beio->io_len = (uint64_t)num_blocks * cbe_lun->blocksize;
+ beio->bio_cmd = BIO_DELETE;
+ beio->ds_trans_type = DEVSTAT_FREE;
+
+ be_lun->unmap(be_lun, beio);
+}
+
+static void
+ctl_be_block_scsi_cr_done(struct ctl_be_block_io *beio)
{
union ctl_io *io;
@@ -1507,8 +1729,8 @@ ctl_be_block_cr_done(struct ctl_be_block_io *beio)
}
static void
-ctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun,
- union ctl_io *io)
+ctl_be_block_scsi_cr_dispatch(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
{
struct ctl_be_block_io *beio;
struct ctl_be_block_softc *softc;
@@ -1519,7 +1741,7 @@ ctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun,
beio = ctl_alloc_beio(softc);
beio->io = io;
beio->lun = be_lun;
- beio->beio_cont = ctl_be_block_cr_done;
+ beio->beio_cont = ctl_be_block_scsi_cr_done;
PRIV(io)->ptr = (void *)beio;
switch (io->scsiio.cdb[0]) {
@@ -1531,7 +1753,7 @@ ctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun,
if (be_lun->get_lba_status)
be_lun->get_lba_status(be_lun, beio);
else
- ctl_be_block_cr_done(beio);
+ ctl_be_block_scsi_cr_done(beio);
break;
default:
panic("Unhandled CDB type %#x", io->scsiio.cdb[0]);
@@ -1539,6 +1761,45 @@ ctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun,
}
}
+static void
+ctl_be_block_nvme_cr_dispatch(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
+{
+ uint8_t cns;
+
+ DPRINTF("entered\n");
+
+ MPASS(io->nvmeio.cmd.opc == NVME_OPC_IDENTIFY);
+
+ cns = le32toh(io->nvmeio.cmd.cdw10) & 0xff;
+ switch (cns) {
+ case 0:
+ ctl_be_block_namespace_data(be_lun, io);
+ break;
+ case 3:
+ ctl_be_block_nvme_ids(be_lun, io);
+ break;
+ default:
+ __assert_unreachable();
+ }
+}
+
+static void
+ctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
+{
+ switch (io->io_hdr.io_type) {
+ case CTL_IO_SCSI:
+ ctl_be_block_scsi_cr_dispatch(be_lun, io);
+ break;
+ case CTL_IO_NVME_ADMIN:
+ ctl_be_block_nvme_cr_dispatch(be_lun, io);
+ break;
+ default:
+ __assert_unreachable();
+ }
+}
+
static void
ctl_be_block_cw_done(struct ctl_be_block_io *beio)
{
@@ -1550,19 +1811,15 @@ ctl_be_block_cw_done(struct ctl_be_block_io *beio)
}
static void
-ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun,
- union ctl_io *io)
+ctl_be_block_scsi_cw_dispatch(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
{
struct ctl_be_block_io *beio;
- struct ctl_be_block_softc *softc;
DPRINTF("entered\n");
- softc = be_lun->softc;
- beio = ctl_alloc_beio(softc);
- beio->io = io;
- beio->lun = be_lun;
- beio->beio_cont = ctl_be_block_cw_done;
+ beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
+
switch (io->scsiio.tag_type) {
case CTL_TAG_ORDERED:
beio->ds_tag_type = DEVSTAT_TAG_ORDERED;
@@ -1577,7 +1834,6 @@ ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun,
beio->ds_tag_type = DEVSTAT_TAG_SIMPLE;
break;
}
- PRIV(io)->ptr = (void *)beio;
switch (io->scsiio.cdb[0]) {
case SYNCHRONIZE_CACHE:
@@ -1597,6 +1853,61 @@ ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun,
}
}
+static void
+ctl_be_block_nvme_cw_dispatch(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
+{
+ struct ctl_be_block_io *beio;
+
+ DPRINTF("entered\n");
+
+ beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
+ beio->ds_tag_type = DEVSTAT_TAG_SIMPLE;
+
+ switch (io->nvmeio.cmd.opc) {
+ case NVME_OPC_FLUSH:
+ ctl_be_block_cw_dispatch_flush(be_lun, io);
+ break;
+ case NVME_OPC_WRITE_UNCORRECTABLE:
+ ctl_be_block_cw_dispatch_wu(be_lun, io);
+ break;
+ case NVME_OPC_WRITE_ZEROES:
+ ctl_be_block_cw_dispatch_wz(be_lun, io);
+ break;
+ case NVME_OPC_DATASET_MANAGEMENT:
+ ctl_be_block_cw_dispatch_dsm(be_lun, io);
+ break;
+ default:
+ __assert_unreachable();
+ }
+}
+
+static void
+ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun,
+ union ctl_io *io)
+{
+ struct ctl_be_block_io *beio;
+ struct ctl_be_block_softc *softc;
+
+ softc = be_lun->softc;
+ beio = ctl_alloc_beio(softc);
+ beio->io = io;
+ beio->lun = be_lun;
+ beio->beio_cont = ctl_be_block_cw_done;
+ PRIV(io)->ptr = (void *)beio;
+
+ switch (io->io_hdr.io_type) {
+ case CTL_IO_SCSI:
+ ctl_be_block_scsi_cw_dispatch(be_lun, io);
+ break;
+ case CTL_IO_NVME:
+ ctl_be_block_nvme_cw_dispatch(be_lun, io);
+ break;
+ default:
+ __assert_unreachable();
+ }
+}
+
SDT_PROBE_DEFINE1(cbb, , read, start, "uint64_t");
SDT_PROBE_DEFINE1(cbb, , write, start, "uint64_t");
SDT_PROBE_DEFINE1(cbb, , read, alloc_done, "uint64_t");
@@ -1656,19 +1967,28 @@ ctl_be_block_dispatch(struct ctl_be_block_lun *be_lun,
bptrlen = PRIV(io);
bptrlen->ptr = (void *)beio;
- switch (io->scsiio.tag_type) {
- case CTL_TAG_ORDERED:
- beio->ds_tag_type = DEVSTAT_TAG_ORDERED;
- break;
- case CTL_TAG_HEAD_OF_QUEUE:
- beio->ds_tag_type = DEVSTAT_TAG_HEAD;
+ switch (io->io_hdr.io_type) {
+ case CTL_IO_SCSI:
+ switch (io->scsiio.tag_type) {
+ case CTL_TAG_ORDERED:
+ beio->ds_tag_type = DEVSTAT_TAG_ORDERED;
+ break;
+ case CTL_TAG_HEAD_OF_QUEUE:
+ beio->ds_tag_type = DEVSTAT_TAG_HEAD;
+ break;
+ case CTL_TAG_UNTAGGED:
+ case CTL_TAG_SIMPLE:
+ case CTL_TAG_ACA:
+ default:
+ beio->ds_tag_type = DEVSTAT_TAG_SIMPLE;
+ break;
+ }
break;
- case CTL_TAG_UNTAGGED:
- case CTL_TAG_SIMPLE:
- case CTL_TAG_ACA:
- default:
+ case CTL_IO_NVME:
beio->ds_tag_type = DEVSTAT_TAG_SIMPLE;
break;
+ default:
+ __assert_unreachable();
}
if (lbalen->flags & CTL_LLF_WRITE) {
@@ -1836,7 +2156,7 @@ ctl_be_block_submit(union ctl_io *io)
be_lun = (struct ctl_be_block_lun *)CTL_BACKEND_LUN(io);
- CTL_IO_ASSERT(io, SCSI);
+ CTL_IO_ASSERT(io, SCSI, NVME);
PRIV(io)->len = 0;
@@ -2711,7 +3031,7 @@ ctl_be_block_lun_shutdown(struct ctl_be_lun *cbe_lun)
}
static int
-ctl_be_block_config_write(union ctl_io *io)
+ctl_be_block_scsi_config_write(union ctl_io *io)
{
struct ctl_be_block_lun *be_lun;
struct ctl_be_lun *cbe_lun;
@@ -2796,7 +3116,50 @@ ctl_be_block_config_write(union ctl_io *io)
}
static int
-ctl_be_block_config_read(union ctl_io *io)
+ctl_be_block_nvme_config_write(union ctl_io *io)
+{
+ struct ctl_be_block_lun *be_lun;
+
+ DPRINTF("entered\n");
+
+ be_lun = (struct ctl_be_block_lun *)CTL_BACKEND_LUN(io);
+
+ switch (io->nvmeio.cmd.opc) {
+ case NVME_OPC_DATASET_MANAGEMENT:
+ DSM_RANGE(io) = 0;
+ /* FALLTHROUGH */
+ case NVME_OPC_FLUSH:
+ case NVME_OPC_WRITE_UNCORRECTABLE:
+ case NVME_OPC_WRITE_ZEROES:
+ mtx_lock(&be_lun->queue_lock);
+ STAILQ_INSERT_TAIL(&be_lun->config_write_queue, &io->io_hdr,
+ links);
+ mtx_unlock(&be_lun->queue_lock);
+ taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task);
+ break;
+ default:
+ ctl_nvme_set_invalid_opcode(&io->nvmeio);
+ ctl_config_write_done(io);
+ break;
+ }
+ return (CTL_RETVAL_COMPLETE);
+}
+
+static int
+ctl_be_block_config_write(union ctl_io *io)
+{
+ switch (io->io_hdr.io_type) {
+ case CTL_IO_SCSI:
+ return (ctl_be_block_scsi_config_write(io));
+ case CTL_IO_NVME:
+ return (ctl_be_block_nvme_config_write(io));
+ default:
+ __assert_unreachable();
+ }
+}
+
+static int
+ctl_be_block_scsi_config_read(union ctl_io *io)
{
struct ctl_be_block_lun *be_lun;
int retval = 0;
@@ -2836,6 +3199,59 @@ ctl_be_block_config_read(union ctl_io *io)
return (retval);
}
+static int
+ctl_be_block_nvme_config_read(union ctl_io *io)
+{
+ struct ctl_be_block_lun *be_lun;
+
+ DPRINTF("entered\n");
+
+ be_lun = (struct ctl_be_block_lun *)CTL_BACKEND_LUN(io);
+
+ switch (io->nvmeio.cmd.opc) {
+ case NVME_OPC_IDENTIFY:
+ {
+ uint8_t cns;
+
+ cns = le32toh(io->nvmeio.cmd.cdw10) & 0xff;
+ switch (cns) {
+ case 0:
+ case 3:
+ mtx_lock(&be_lun->queue_lock);
+ STAILQ_INSERT_TAIL(&be_lun->config_read_queue,
+ &io->io_hdr, links);
+ mtx_unlock(&be_lun->queue_lock);
+ taskqueue_enqueue(be_lun->io_taskqueue,
+ &be_lun->io_task);
+ return (CTL_RETVAL_QUEUED);
+ default:
+ ctl_nvme_set_invalid_field(&io->nvmeio);
+ ctl_config_read_done(io);
+ break;
+ }
+ break;
+ }
+ default:
+ ctl_nvme_set_invalid_opcode(&io->nvmeio);
+ ctl_config_read_done(io);
+ break;
+ }
+ return (CTL_RETVAL_COMPLETE);
+}
+
+static int
+ctl_be_block_config_read(union ctl_io *io)
+{
+ switch (io->io_hdr.io_type) {
+ case CTL_IO_SCSI:
+ return (ctl_be_block_scsi_config_read(io));
+ case CTL_IO_NVME_ADMIN:
+ return (ctl_be_block_nvme_config_read(io));
+ default:
+ __assert_unreachable();
+ }
+}
+
static int
ctl_be_block_lun_info(struct ctl_be_lun *cbe_lun, struct sbuf *sb)
{