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Fix coverity defects: CID 155928

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CID 155928: Integer handling issues (DIVIDE_BY_ZERO)

In the current vdev label, the leaf count is always non-zero
but it doesn't hurt to check the count for future proofing.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Don Brady <don.brady@intel.com>
Closes #5749
This commit is contained in:
Don Brady 2017-02-07 10:29:47 -07:00 committed by Brian Behlendorf
parent 582cc01416
commit cd5083c00c
1 changed files with 11 additions and 8 deletions
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19
cmd/zdb/zdb.c
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@ -2303,7 +2303,7 @@ dump_nvlist_stats(nvlist_t *nvl, size_t cap)
{
zdb_nvl_stats_t stats = { 0 };
size_t size, sum = 0, total;
size_t noise, average;
size_t noise;
/* requires nvlist with non-unique names for stat collection */
VERIFY0(nvlist_alloc(&stats.zns_string, 0, 0));
@ -2344,15 +2344,18 @@ dump_nvlist_stats(nvlist_t *nvl, size_t cap)
(void) printf("%12s %4d %6d bytes (%5.2f%%)\n\n", "nvlists:",
stats.zns_list_count, (int)size, 100.0 * size / total);
average = stats.zns_leaf_total / stats.zns_leaf_count;
(void) printf("%12s %4d %6d bytes average\n",
"leaf vdevs:", stats.zns_leaf_count, (int)average);
(void) printf("%24d bytes largest\n", (int)stats.zns_leaf_largest);
if (stats.zns_leaf_count > 0) {
size_t average = stats.zns_leaf_total / stats.zns_leaf_count;
if (dump_opt['l'] >= 3)
(void) printf(" space for %d additional leaf vdevs\n",
(int)((cap - total) / average));
(void) printf("%12s %4d %6d bytes average\n", "leaf vdevs:",
stats.zns_leaf_count, (int)average);
(void) printf("%24d bytes largest\n",
(int)stats.zns_leaf_largest);
if (dump_opt['l'] >= 3 && average > 0)
(void) printf(" space for %d additional leaf vdevs\n",
(int)((cap - total) / average));
}
(void) printf("\n");
nvlist_free(stats.zns_string);