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selftests/livepatch: Don't clear dmesg when running tests

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Inspired by commit f131d9edc2 ("selftests/lkdtm: Don't clear dmesg
when running tests"), keep a reference dmesg copy when beginning each
test.  This way check_result() can compare against the initial copy
rather than relying upon an empty log.

Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Reviewed-by: Yannick Cote <ycote@redhat.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20200618181040.21132-2-joe.lawrence@redhat.com
This commit is contained in:
Joe Lawrence
2020-06-18 14:10:38 -04:00
committed by Petr Mladek
parent 270f7806d3
commit 2eeb0d457d
7 changed files with 66 additions and 81 deletions
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12
tools/testing/selftests/livepatch/test-livepatch.sh
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@@ -10,13 +10,11 @@ MOD_REPLACE=test_klp_atomic_replace
setup_config
# TEST: basic function patching
# - load a livepatch that modifies the output from /proc/cmdline and
# verify correct behavior
# - unload the livepatch and make sure the patch was removed
echo -n "TEST: basic function patching ... "
dmesg -C
start_test "basic function patching"
load_lp $MOD_LIVEPATCH
@@ -47,15 +45,13 @@ livepatch: '$MOD_LIVEPATCH': unpatching complete
% rmmod $MOD_LIVEPATCH"
# TEST: multiple livepatches
# - load a livepatch that modifies the output from /proc/cmdline and
# verify correct behavior
# - load another livepatch and verify that both livepatches are active
# - unload the second livepatch and verify that the first is still active
# - unload the first livepatch and verify none are active
echo -n "TEST: multiple livepatches ... "
dmesg -C
start_test "multiple livepatches"
load_lp $MOD_LIVEPATCH
@@ -109,7 +105,6 @@ livepatch: '$MOD_LIVEPATCH': unpatching complete
% rmmod $MOD_LIVEPATCH"
# TEST: atomic replace livepatch
# - load a livepatch that modifies the output from /proc/cmdline and
# verify correct behavior
# - load an atomic replace livepatch and verify that only the second is active
@@ -117,8 +112,7 @@ livepatch: '$MOD_LIVEPATCH': unpatching complete
# is still active
# - remove the atomic replace livepatch and verify that none are active
echo -n "TEST: atomic replace livepatch ... "
dmesg -C
start_test "atomic replace livepatch"
load_lp $MOD_LIVEPATCH