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>
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",