Now that the kernel reports the size of the btt, lets check that the
size stays constant across kernel updates. I.e. if we inadvertently
introduce a change that causes the btt to reduce the effective capacity
of the block device, this test is meant to catch it.
Cc: Vishal Verma <vishal.l.ve...@intel.com>
Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
---
test/libndctl.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 66 insertions(+)
diff --git a/test/libndctl.c b/test/libndctl.c
index 5f86addc5c7e..e36fe8a4fe6f 100644
--- a/test/libndctl.c
+++ b/test/libndctl.c
@@ -937,6 +937,68 @@ static int check_pfn_create(struct ndctl_region *region,
return rc;
}
+static int check_btt_size(struct ndctl_btt *btt)
+{
+ struct ndctl_namespace *ndns = ndctl_btt_get_namespace(btt);
+ unsigned long long ns_size = ndctl_namespace_get_size(ndns);
+ unsigned long sect_size = ndctl_btt_get_sector_size(btt);
+ unsigned long long actual, expect;
+ int size_select, sect_select;
+ unsigned long long expect_table[][2] = {
+ [0] = {
+ [0] = 0x11b4400,
+ [1] = 0x8da2000,
+ },
+ [1] = {
+ [0] = 0x13b0400,
+ [1] = 0x9d82000,
+ },
+ [2] = {
+ [0] = 0x1aa2600,
+ [1] = 0xd513000,
+ },
+ };
+
+ if (sect_size >= SZ_4K)
+ sect_select = 1;
+ else if (sect_size >= 512)
+ sect_select = 0;
+ else {
+ fprintf(stderr, "%s: %s unexpected sector size: %lx\n",
+ __func__, ndctl_btt_get_devname(btt),
+ sect_size);
+ return -ENXIO;
+ }
+
+ switch (ns_size) {
+ case SZ_18M:
+ size_select = 0;
+ break;
+ case SZ_20M:
+ size_select = 1;
+ break;
+ case SZ_27M:
+ size_select = 2;
+ break;
+ default:
+ fprintf(stderr, "%s: %s unexpected namespace size: %llx\n",
+ __func__, ndctl_namespace_get_devname(ndns),
+ ns_size);
+ break;
+ }
+
+ expect = expect_table[size_select][sect_select];
+ actual = ndctl_btt_get_size(btt);
+ if (expect != actual) {
+ fprintf(stderr, "%s: namespace: %s unexpected size: %llx
(expected: %llx)\n",
+ ndctl_btt_get_devname(btt),
+ ndctl_namespace_get_devname(ndns), actual,
expect);
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
static int check_btt_create(struct ndctl_region *region, struct
ndctl_namespace *ndns,
struct namespace *namespace)
{
@@ -982,6 +1044,10 @@ static int check_btt_create(struct ndctl_region *region,
struct ndctl_namespace
fprintf(stderr, "%s: expected safe mode got: %d\n",
devname, mode);
+ rc = check_btt_size(btt);
+ if (rc)
+ goto err;
+
if (btt_seed == ndctl_region_get_btt_seed(region)
&& btt == btt_seed) {
fprintf(stderr, "%s: failed to advance btt seed\n",
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