selftests: cgroup: add test_zswap program
Patch series "selftests: cgroup: add zswap test program". This series adds 2 zswap related selftests that verify known and fixed issues. A new dedicated test program (test_zswap) is proposed since the test cases are specific to zswap and hosts specific helpers. The first patch adds the (empty) test program, while the other 2 add an actual test function each. This patch (of 3): Add empty cgroup-zswap self test scaffold program, test functions to be added in the next commits. Link: https://lkml.kernel.org/r/20230621153548.428093-1-cerasuolodomenico@gmail.com Link: https://lkml.kernel.org/r/20230621153548.428093-2-cerasuolodomenico@gmail.com Signed-off-by: Domenico Cerasuolo <cerasuolodomenico@gmail.com> Cc: Dan Streetman <ddstreet@ieee.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Muchun Song <muchun.song@linux.dev> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Rik van Riel <riel@surriel.com> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Seth Jennings <sjenning@redhat.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Vitaly Wool <vitaly.wool@konsulko.com> Cc: Zefan Li <lizefan.x@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -5,4 +5,5 @@ test_freezer
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test_kmem
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test_kill
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test_cpu
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test_zswap
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wait_inotify
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@ -12,6 +12,7 @@ TEST_GEN_PROGS += test_core
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TEST_GEN_PROGS += test_freezer
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TEST_GEN_PROGS += test_kill
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TEST_GEN_PROGS += test_cpu
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TEST_GEN_PROGS += test_zswap
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LOCAL_HDRS += $(selfdir)/clone3/clone3_selftests.h $(selfdir)/pidfd/pidfd.h
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@ -23,3 +24,4 @@ $(OUTPUT)/test_core: cgroup_util.c
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$(OUTPUT)/test_freezer: cgroup_util.c
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$(OUTPUT)/test_kill: cgroup_util.c
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$(OUTPUT)/test_cpu: cgroup_util.c
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$(OUTPUT)/test_zswap: cgroup_util.c
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@ -0,0 +1,62 @@
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// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#include <linux/limits.h>
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#include <unistd.h>
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#include <stdio.h>
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#include "../kselftest.h"
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#include "cgroup_util.h"
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#define T(x) { x, #x }
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struct zswap_test {
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int (*fn)(const char *root);
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const char *name;
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} tests[] = {
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};
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#undef T
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static bool zswap_configured(void)
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{
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return access("/sys/module/zswap", F_OK) == 0;
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}
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int main(int argc, char **argv)
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{
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char root[PATH_MAX];
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int i, ret = EXIT_SUCCESS;
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if (cg_find_unified_root(root, sizeof(root)))
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ksft_exit_skip("cgroup v2 isn't mounted\n");
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if (!zswap_configured())
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ksft_exit_skip("zswap isn't configured\n");
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/*
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* Check that memory controller is available:
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* memory is listed in cgroup.controllers
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*/
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if (cg_read_strstr(root, "cgroup.controllers", "memory"))
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ksft_exit_skip("memory controller isn't available\n");
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if (cg_read_strstr(root, "cgroup.subtree_control", "memory"))
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if (cg_write(root, "cgroup.subtree_control", "+memory"))
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ksft_exit_skip("Failed to set memory controller\n");
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for (i = 0; i < ARRAY_SIZE(tests); i++) {
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switch (tests[i].fn(root)) {
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case KSFT_PASS:
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ksft_test_result_pass("%s\n", tests[i].name);
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break;
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case KSFT_SKIP:
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ksft_test_result_skip("%s\n", tests[i].name);
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break;
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default:
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ret = EXIT_FAILURE;
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ksft_test_result_fail("%s\n", tests[i].name);
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break;
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}
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}
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return ret;
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}
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