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path: root/tools/testing/selftests/cgroup/test_core.c
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Diffstat (limited to 'tools/testing/selftests/cgroup/test_core.c')
-rw-r--r--tools/testing/selftests/cgroup/test_core.c102
1 files changed, 86 insertions, 16 deletions
diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c
index 600123503063..102262555a59 100644
--- a/tools/testing/selftests/cgroup/test_core.c
+++ b/tools/testing/selftests/cgroup/test_core.c
@@ -5,6 +5,8 @@
#include <linux/sched.h>
#include <sys/types.h>
#include <sys/mman.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>
@@ -15,9 +17,14 @@
#include <string.h>
#include <pthread.h>
-#include "../kselftest.h"
+#include "kselftest.h"
#include "cgroup_util.h"
+static bool nsdelegate;
+#ifndef CLONE_NEWCGROUP
+#define CLONE_NEWCGROUP 0
+#endif
+
static int touch_anon(char *buf, size_t size)
{
int fd;
@@ -146,6 +153,9 @@ static int test_cgcore_populated(const char *root)
int cgroup_fd = -EBADF;
pid_t pid;
+ if (cg_test_v1_named)
+ return KSFT_SKIP;
+
cg_test_a = cg_name(root, "cg_test_a");
cg_test_b = cg_name(root, "cg_test_a/cg_test_b");
cg_test_c = cg_name(root, "cg_test_a/cg_test_b/cg_test_c");
@@ -275,6 +285,9 @@ static int test_cgcore_invalid_domain(const char *root)
int ret = KSFT_FAIL;
char *grandparent = NULL, *parent = NULL, *child = NULL;
+ if (cg_test_v1_named)
+ return KSFT_SKIP;
+
grandparent = cg_name(root, "cg_test_grandparent");
parent = cg_name(root, "cg_test_grandparent/cg_test_parent");
child = cg_name(root, "cg_test_grandparent/cg_test_parent/cg_test_child");
@@ -337,6 +350,9 @@ static int test_cgcore_parent_becomes_threaded(const char *root)
int ret = KSFT_FAIL;
char *parent = NULL, *child = NULL;
+ if (cg_test_v1_named)
+ return KSFT_SKIP;
+
parent = cg_name(root, "cg_test_parent");
child = cg_name(root, "cg_test_parent/cg_test_child");
if (!parent || !child)
@@ -376,7 +392,8 @@ static int test_cgcore_no_internal_process_constraint_on_threads(const char *roo
int ret = KSFT_FAIL;
char *parent = NULL, *child = NULL;
- if (cg_read_strstr(root, "cgroup.controllers", "cpu") ||
+ if (cg_test_v1_named ||
+ cg_read_strstr(root, "cgroup.controllers", "cpu") ||
cg_write(root, "cgroup.subtree_control", "+cpu")) {
ret = KSFT_SKIP;
goto cleanup;
@@ -428,6 +445,9 @@ static int test_cgcore_top_down_constraint_enable(const char *root)
int ret = KSFT_FAIL;
char *parent = NULL, *child = NULL;
+ if (cg_test_v1_named)
+ return KSFT_SKIP;
+
parent = cg_name(root, "cg_test_parent");
child = cg_name(root, "cg_test_parent/cg_test_child");
if (!parent || !child)
@@ -463,6 +483,9 @@ static int test_cgcore_top_down_constraint_disable(const char *root)
int ret = KSFT_FAIL;
char *parent = NULL, *child = NULL;
+ if (cg_test_v1_named)
+ return KSFT_SKIP;
+
parent = cg_name(root, "cg_test_parent");
child = cg_name(root, "cg_test_parent/cg_test_child");
if (!parent || !child)
@@ -504,6 +527,9 @@ static int test_cgcore_internal_process_constraint(const char *root)
int ret = KSFT_FAIL;
char *parent = NULL, *child = NULL;
+ if (cg_test_v1_named)
+ return KSFT_SKIP;
+
parent = cg_name(root, "cg_test_parent");
child = cg_name(root, "cg_test_parent/cg_test_child");
if (!parent || !child)
@@ -571,7 +597,7 @@ static int test_cgcore_proc_migration(const char *root)
}
cg_enter_current(dst);
- if (cg_read_lc(dst, "cgroup.threads") != n_threads + 1)
+ if (cg_read_lc(dst, CG_THREADS_FILE) != n_threads + 1)
goto cleanup;
ret = KSFT_PASS;
@@ -603,7 +629,7 @@ static void *migrating_thread_fn(void *arg)
char lines[3][PATH_MAX];
for (g = 1; g < 3; ++g)
- snprintf(lines[g], sizeof(lines[g]), "0::%s", grps[g] + strlen(grps[0]));
+ snprintf(lines[g], sizeof(lines[g]), CG_PATH_FORMAT, grps[g] + strlen(grps[0]));
for (i = 0; i < n_iterations; ++i) {
cg_enter_current_thread(grps[(i % 2) + 1]);
@@ -640,10 +666,12 @@ static int test_cgcore_thread_migration(const char *root)
if (cg_create(grps[2]))
goto cleanup;
- if (cg_write(grps[1], "cgroup.type", "threaded"))
- goto cleanup;
- if (cg_write(grps[2], "cgroup.type", "threaded"))
- goto cleanup;
+ if (!cg_test_v1_named) {
+ if (cg_write(grps[1], "cgroup.type", "threaded"))
+ goto cleanup;
+ if (cg_write(grps[2], "cgroup.type", "threaded"))
+ goto cleanup;
+ }
if (cg_enter_current(grps[1]))
goto cleanup;
@@ -657,7 +685,7 @@ static int test_cgcore_thread_migration(const char *root)
if (retval)
goto cleanup;
- snprintf(line, sizeof(line), "0::%s", grps[1] + strlen(grps[0]));
+ snprintf(line, sizeof(line), CG_PATH_FORMAT, grps[1] + strlen(grps[0]));
if (proc_read_strstr(0, 1, "cgroup", line))
goto cleanup;
@@ -683,7 +711,7 @@ cleanup:
*/
static int test_cgcore_lesser_euid_open(const char *root)
{
- const uid_t test_euid = 65534; /* usually nobody, any !root is fine */
+ const uid_t test_euid = TEST_UID;
int ret = KSFT_FAIL;
char *cg_test_a = NULL, *cg_test_b = NULL;
char *cg_test_a_procs = NULL, *cg_test_b_procs = NULL;
@@ -775,6 +803,9 @@ static int test_cgcore_lesser_ns_open(const char *root)
pid_t pid;
int status;
+ if (!nsdelegate)
+ return KSFT_SKIP;
+
cg_test_a = cg_name(root, "cg_test_a");
cg_test_b = cg_name(root, "cg_test_b");
@@ -837,6 +868,38 @@ cleanup:
return ret;
}
+static int setup_named_v1_root(char *root, size_t len, const char *name)
+{
+ char options[PATH_MAX];
+ int r;
+
+ r = snprintf(root, len, "/mnt/cg_selftest");
+ if (r < 0)
+ return r;
+
+ r = snprintf(options, sizeof(options), "none,name=%s", name);
+ if (r < 0)
+ return r;
+
+ r = mkdir(root, 0755);
+ if (r < 0 && errno != EEXIST)
+ return r;
+
+ r = mount("none", root, "cgroup", 0, options);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static void cleanup_named_v1_root(char *root)
+{
+ if (!cg_test_v1_named)
+ return;
+ umount(root);
+ rmdir(root);
+}
+
#define T(x) { x, #x }
struct corecg_test {
int (*fn)(const char *root);
@@ -860,15 +923,22 @@ struct corecg_test {
int main(int argc, char *argv[])
{
char root[PATH_MAX];
- int i, ret = EXIT_SUCCESS;
-
- if (cg_find_unified_root(root, sizeof(root)))
- ksft_exit_skip("cgroup v2 isn't mounted\n");
+ int i;
+
+ ksft_print_header();
+ ksft_set_plan(ARRAY_SIZE(tests));
+ if (cg_find_unified_root(root, sizeof(root), &nsdelegate)) {
+ if (setup_named_v1_root(root, sizeof(root), CG_NAMED_NAME))
+ ksft_exit_skip("cgroup v2 isn't mounted and could not setup named v1 hierarchy\n");
+ cg_test_v1_named = true;
+ goto post_v2_setup;
+ }
if (cg_read_strstr(root, "cgroup.subtree_control", "memory"))
if (cg_write(root, "cgroup.subtree_control", "+memory"))
ksft_exit_skip("Failed to set memory controller\n");
+post_v2_setup:
for (i = 0; i < ARRAY_SIZE(tests); i++) {
switch (tests[i].fn(root)) {
case KSFT_PASS:
@@ -878,11 +948,11 @@ int main(int argc, char *argv[])
ksft_test_result_skip("%s\n", tests[i].name);
break;
default:
- ret = EXIT_FAILURE;
ksft_test_result_fail("%s\n", tests[i].name);
break;
}
}
- return ret;
+ cleanup_named_v1_root(root);
+ ksft_finished();
}
generated by cgit (git 2.34.1) at 2025-12-25 09:30:25 +0000