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hw/block/nvme: error if drive less than a zone size 

If a user assigns a backing device with less capacity than the size of a
single zone, the namespace capacity will be reported as zero and the
kernel will silently fail to allocate the namespace.

This patch errors out in case that the backing device cannot accomodate
at least a single zone.

Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
[k.jensen: small fixup in the error and commit message]
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
master
Minwoo Im 2021-01-15 21:19:20 +09:00 committed by Klaus Jensen
parent 38001f7340
commit 044f1876b0
1 changed files with 7 additions and 0 deletions
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7
hw/block/nvme-ns.c
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@ -134,6 +134,13 @@ static int nvme_ns_zoned_check_calc_geometry(NvmeNamespace *ns, Error **errp)
ns->num_zones = ns->size / lbasz / ns->zone_size;
/* Do a few more sanity checks of ZNS properties */
if (!ns->num_zones) {
error_setg(errp,
"insufficient drive capacity, must be at least the size "
"of one zone (%"PRIu64"B)", zone_size);
return -1;
}
if (ns->params.max_open_zones > ns->num_zones) {
error_setg(errp,
"max_open_zones value %u exceeds the number of zones %u",