From: Tianchen Ding dtcccc@linux.alibaba.com
stable inclusion from stable-v6.6.33 commit c81b6d64962af3c32dd2044f16f738d5c53de24b category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IAD6H2
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 4793cb599b1bdc3d356f0374c2c99ffe890ae876 ]
The test case test_cgcore_lesser_ns_open only tasks effect when cgroup2 is mounted with "nsdelegate" mount option. If it misses this option, or is remounted without "nsdelegate", the test case will fail. For example, running bpf/test_cgroup_storage first, and then run cgroup/test_core will fail on test_cgcore_lesser_ns_open. Skip it if "nsdelegate" is not detected in cgroup2 mount options.
Fixes: bf35a7879f1d ("selftests: cgroup: Test open-time cgroup namespace usage for migration checks") Signed-off-by: Tianchen Ding dtcccc@linux.alibaba.com Reviewed-by: Muhammad Usama Anjum usama.anjum@collabora.com Signed-off-by: Tejun Heo tj@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Wang Hai wanghai38@huawei.com --- tools/testing/selftests/cgroup/cgroup_util.c | 8 +++++--- tools/testing/selftests/cgroup/cgroup_util.h | 2 +- tools/testing/selftests/cgroup/test_core.c | 7 ++++++- tools/testing/selftests/cgroup/test_cpu.c | 2 +- tools/testing/selftests/cgroup/test_cpuset.c | 2 +- tools/testing/selftests/cgroup/test_freezer.c | 2 +- tools/testing/selftests/cgroup/test_kill.c | 2 +- tools/testing/selftests/cgroup/test_kmem.c | 2 +- tools/testing/selftests/cgroup/test_memcontrol.c | 2 +- tools/testing/selftests/cgroup/test_zswap.c | 2 +- 10 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/tools/testing/selftests/cgroup/cgroup_util.c b/tools/testing/selftests/cgroup/cgroup_util.c index 0340d4ca8f51..432db923bced 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.c +++ b/tools/testing/selftests/cgroup/cgroup_util.c @@ -195,10 +195,10 @@ int cg_write_numeric(const char *cgroup, const char *control, long value) return cg_write(cgroup, control, buf); }
-int cg_find_unified_root(char *root, size_t len) +int cg_find_unified_root(char *root, size_t len, bool *nsdelegate) { char buf[10 * PAGE_SIZE]; - char *fs, *mount, *type; + char *fs, *mount, *type, *options; const char delim[] = "\n\t ";
if (read_text("/proc/self/mounts", buf, sizeof(buf)) <= 0) @@ -211,12 +211,14 @@ int cg_find_unified_root(char *root, size_t len) for (fs = strtok(buf, delim); fs; fs = strtok(NULL, delim)) { mount = strtok(NULL, delim); type = strtok(NULL, delim); - strtok(NULL, delim); + options = strtok(NULL, delim); strtok(NULL, delim); strtok(NULL, delim);
if (strcmp(type, "cgroup2") == 0) { strncpy(root, mount, len); + if (nsdelegate) + *nsdelegate = !!strstr(options, "nsdelegate"); return 0; } } diff --git a/tools/testing/selftests/cgroup/cgroup_util.h b/tools/testing/selftests/cgroup/cgroup_util.h index 1df7f202214a..89e8519fb271 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.h +++ b/tools/testing/selftests/cgroup/cgroup_util.h @@ -21,7 +21,7 @@ static inline int values_close(long a, long b, int err) return abs(a - b) <= (a + b) / 100 * err; }
-extern int cg_find_unified_root(char *root, size_t len); +extern int cg_find_unified_root(char *root, size_t len, bool *nsdelegate); extern char *cg_name(const char *root, const char *name); extern char *cg_name_indexed(const char *root, const char *name, int index); extern char *cg_control(const char *cgroup, const char *control); diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index 80aa6b2373b9..a5672a91d273 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -18,6 +18,8 @@ #include "../kselftest.h" #include "cgroup_util.h"
+static bool nsdelegate; + static int touch_anon(char *buf, size_t size) { int fd; @@ -775,6 +777,9 @@ 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");
@@ -862,7 +867,7 @@ int main(int argc, char *argv[]) char root[PATH_MAX]; int i, ret = EXIT_SUCCESS;
- if (cg_find_unified_root(root, sizeof(root))) + if (cg_find_unified_root(root, sizeof(root), &nsdelegate)) ksft_exit_skip("cgroup v2 isn't mounted\n");
if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) diff --git a/tools/testing/selftests/cgroup/test_cpu.c b/tools/testing/selftests/cgroup/test_cpu.c index 24020a2c68dc..186bf96f6a28 100644 --- a/tools/testing/selftests/cgroup/test_cpu.c +++ b/tools/testing/selftests/cgroup/test_cpu.c @@ -700,7 +700,7 @@ int main(int argc, char *argv[]) char root[PATH_MAX]; int i, ret = EXIT_SUCCESS;
- if (cg_find_unified_root(root, sizeof(root))) + if (cg_find_unified_root(root, sizeof(root), NULL)) ksft_exit_skip("cgroup v2 isn't mounted\n");
if (cg_read_strstr(root, "cgroup.subtree_control", "cpu")) diff --git a/tools/testing/selftests/cgroup/test_cpuset.c b/tools/testing/selftests/cgroup/test_cpuset.c index b061ed1e05b4..4034d14ba69a 100644 --- a/tools/testing/selftests/cgroup/test_cpuset.c +++ b/tools/testing/selftests/cgroup/test_cpuset.c @@ -249,7 +249,7 @@ int main(int argc, char *argv[]) char root[PATH_MAX]; int i, ret = EXIT_SUCCESS;
- if (cg_find_unified_root(root, sizeof(root))) + if (cg_find_unified_root(root, sizeof(root), NULL)) ksft_exit_skip("cgroup v2 isn't mounted\n");
if (cg_read_strstr(root, "cgroup.subtree_control", "cpuset")) diff --git a/tools/testing/selftests/cgroup/test_freezer.c b/tools/testing/selftests/cgroup/test_freezer.c index ff519029f6f4..969e9f0f495c 100644 --- a/tools/testing/selftests/cgroup/test_freezer.c +++ b/tools/testing/selftests/cgroup/test_freezer.c @@ -827,7 +827,7 @@ int main(int argc, char *argv[]) char root[PATH_MAX]; int i, ret = EXIT_SUCCESS;
- if (cg_find_unified_root(root, sizeof(root))) + if (cg_find_unified_root(root, sizeof(root), NULL)) ksft_exit_skip("cgroup v2 isn't mounted\n"); for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { diff --git a/tools/testing/selftests/cgroup/test_kill.c b/tools/testing/selftests/cgroup/test_kill.c index 6153690319c9..0e5bb6c7307a 100644 --- a/tools/testing/selftests/cgroup/test_kill.c +++ b/tools/testing/selftests/cgroup/test_kill.c @@ -276,7 +276,7 @@ int main(int argc, char *argv[]) char root[PATH_MAX]; int i, ret = EXIT_SUCCESS;
- if (cg_find_unified_root(root, sizeof(root))) + if (cg_find_unified_root(root, sizeof(root), NULL)) ksft_exit_skip("cgroup v2 isn't mounted\n"); for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { diff --git a/tools/testing/selftests/cgroup/test_kmem.c b/tools/testing/selftests/cgroup/test_kmem.c index c82f974b85c9..137506db0312 100644 --- a/tools/testing/selftests/cgroup/test_kmem.c +++ b/tools/testing/selftests/cgroup/test_kmem.c @@ -420,7 +420,7 @@ int main(int argc, char **argv) char root[PATH_MAX]; int i, ret = EXIT_SUCCESS;
- if (cg_find_unified_root(root, sizeof(root))) + if (cg_find_unified_root(root, sizeof(root), NULL)) ksft_exit_skip("cgroup v2 isn't mounted\n");
/* diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c index c7c9572003a8..b462416b3806 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -1314,7 +1314,7 @@ int main(int argc, char **argv) char root[PATH_MAX]; int i, proc_status, ret = EXIT_SUCCESS;
- if (cg_find_unified_root(root, sizeof(root))) + if (cg_find_unified_root(root, sizeof(root), NULL)) ksft_exit_skip("cgroup v2 isn't mounted\n");
/* diff --git a/tools/testing/selftests/cgroup/test_zswap.c b/tools/testing/selftests/cgroup/test_zswap.c index 49def87a909b..6927b4a06dee 100644 --- a/tools/testing/selftests/cgroup/test_zswap.c +++ b/tools/testing/selftests/cgroup/test_zswap.c @@ -250,7 +250,7 @@ int main(int argc, char **argv) char root[PATH_MAX]; int i, ret = EXIT_SUCCESS;
- if (cg_find_unified_root(root, sizeof(root))) + if (cg_find_unified_root(root, sizeof(root), NULL)) ksft_exit_skip("cgroup v2 isn't mounted\n");
if (!zswap_configured())