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From 32de33be68f3892698d492b9ab8f21f9186b3f4c Mon Sep 17 00:00:00 2001
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From: Ming-Hung Tsai <mtsai@redhat.com>
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Date: Wed, 2 Jun 2021 01:23:13 +0800
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Subject: [PATCH 05/10] [thin_show_duplicates] Fix potential errors
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- Fix error if no --block-sector provided
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- Fix errors on pools without mappings, or zero-length file
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---
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thin-provisioning/thin_show_duplicates.cc | 8 ++++++--
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1 file changed, 6 insertions(+), 2 deletions(-)
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diff --git a/thin-provisioning/thin_show_duplicates.cc b/thin-provisioning/thin_show_duplicates.cc
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index b1eebb7..f7354eb 100644
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--- a/thin-provisioning/thin_show_duplicates.cc
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+++ b/thin-provisioning/thin_show_duplicates.cc
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@@ -56,7 +56,7 @@ using namespace thin_provisioning;
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namespace {
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bool factor_of(block_address f, block_address n) {
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- return (n % f) == 0;
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+ return f && (n % f) == 0;
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}
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uint64_t parse_int(string const &str, string const &desc) {
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@@ -132,11 +132,15 @@ namespace {
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class duplicate_detector {
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public:
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void scan_with_variable_sized_chunks(chunk_stream &stream) {
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+ if (!stream.size())
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+ return;
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variable_chunk_stream vstream(stream, 4096);
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scan(vstream);
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}
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void scan_with_fixed_sized_chunks(chunk_stream &stream, block_address chunk_size) {
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+ if (!stream.size())
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+ return;
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fixed_chunk_stream fstream(stream, chunk_size);
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scan(fstream);
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}
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@@ -222,7 +226,7 @@ namespace {
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if (fs.content_based_chunks)
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detector.scan_with_variable_sized_chunks(pstream);
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else {
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- if (*fs.block_size) {
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+ if (!!fs.block_size) {
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if (factor_of(*fs.block_size, block_size))
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block_size = *fs.block_size;
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else
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--
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1.8.3.1
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