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[bpf-next] selftests/bpf: set test path for token/obj_priv_implicit_token_envvar

Message ID 20241115003853.864397-1-ihor.solodrai@pm.me (mailing list archive)
State New
Delegated to: BPF
Headers show
Series [bpf-next] selftests/bpf: set test path for token/obj_priv_implicit_token_envvar | expand

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netdev/build_32bit success Errors and warnings before: 3 this patch: 3
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netdev/cc_maintainers warning 10 maintainers not CCed: kpsingh@kernel.org jolsa@kernel.org shuah@kernel.org song@kernel.org haoluo@google.com john.fastabend@gmail.com yonghong.song@linux.dev martin.lau@linux.dev linux-kselftest@vger.kernel.org sdf@fomichev.me
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netdev/build_allmodconfig_warn success Errors and warnings before: 3 this patch: 3
netdev/checkpatch fail ERROR: "foo* bar" should be "foo *bar" ERROR: Bad function definition - const char* token_bpffs_custom_dir() should probably be const char* token_bpffs_custom_dir(void) ERROR: open brace '{' following function definitions go on the next line WARNING: line length of 88 exceeds 80 columns
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Commit Message

Ihor Solodrai Nov. 15, 2024, 12:38 a.m. UTC 
token/obj_priv_implicit_token_envvar test may fail in an environment
where the process executing tests can not write to the root path.

Example:
https://github.com/libbpf/libbpf/actions/runs/11844507007/job/33007897936

Change default path used by the test to /tmp/bpf-token-fs, and make it
runtime configurable via an environment variable.

Signed-off-by: Ihor Solodrai <ihor.solodrai@pm.me>
---
 tools/testing/selftests/bpf/prog_tests/token.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/prog_tests/token.c b/tools/testing/selftests/bpf/prog_tests/token.c
index fe86e4fdb89c..39f5414b674b 100644
--- a/tools/testing/selftests/bpf/prog_tests/token.c
+++ b/tools/testing/selftests/bpf/prog_tests/token.c
@@ -828,8 +828,11 @@  static int userns_obj_priv_btf_success(int mnt_fd, struct token_lsm *lsm_skel)
 	return validate_struct_ops_load(mnt_fd, true /* should succeed */);
 }
 
+static const char* token_bpffs_custom_dir() {
+	return getenv("BPF_SELFTESTS_BPF_TOKEN_DIR") ? : "/tmp/bpf-token-fs";
+}
+
 #define TOKEN_ENVVAR "LIBBPF_BPF_TOKEN_PATH"
-#define TOKEN_BPFFS_CUSTOM "/bpf-token-fs"
 
 static int userns_obj_priv_implicit_token(int mnt_fd, struct token_lsm *lsm_skel)
 {
@@ -892,6 +895,7 @@  static int userns_obj_priv_implicit_token(int mnt_fd, struct token_lsm *lsm_skel
 
 static int userns_obj_priv_implicit_token_envvar(int mnt_fd, struct token_lsm *lsm_skel)
 {
+	const char *custom_dir = token_bpffs_custom_dir();
 	LIBBPF_OPTS(bpf_object_open_opts, opts);
 	struct dummy_st_ops_success *skel;
 	int err;
@@ -909,10 +913,10 @@  static int userns_obj_priv_implicit_token_envvar(int mnt_fd, struct token_lsm *l
 	 * BPF token implicitly, unless pointed to it through
 	 * LIBBPF_BPF_TOKEN_PATH envvar
 	 */
-	rmdir(TOKEN_BPFFS_CUSTOM);
-	if (!ASSERT_OK(mkdir(TOKEN_BPFFS_CUSTOM, 0777), "mkdir_bpffs_custom"))
+	rmdir(custom_dir);
+	if (!ASSERT_OK(mkdir(custom_dir, 0777), "mkdir_bpffs_custom"))
 		goto err_out;
-	err = sys_move_mount(mnt_fd, "", AT_FDCWD, TOKEN_BPFFS_CUSTOM, MOVE_MOUNT_F_EMPTY_PATH);
+	err = sys_move_mount(mnt_fd, "", AT_FDCWD, custom_dir, MOVE_MOUNT_F_EMPTY_PATH);
 	if (!ASSERT_OK(err, "move_mount_bpffs"))
 		goto err_out;
 
@@ -925,7 +929,7 @@  static int userns_obj_priv_implicit_token_envvar(int mnt_fd, struct token_lsm *l
 		goto err_out;
 	}
 
-	err = setenv(TOKEN_ENVVAR, TOKEN_BPFFS_CUSTOM, 1 /*overwrite*/);
+	err = setenv(TOKEN_ENVVAR, custom_dir, 1 /*overwrite*/);
 	if (!ASSERT_OK(err, "setenv_token_path"))
 		goto err_out;
 
@@ -951,11 +955,11 @@  static int userns_obj_priv_implicit_token_envvar(int mnt_fd, struct token_lsm *l
 	if (!ASSERT_ERR(err, "obj_empty_token_path_load"))
 		goto err_out;
 
-	rmdir(TOKEN_BPFFS_CUSTOM);
+	rmdir(custom_dir);
 	unsetenv(TOKEN_ENVVAR);
 	return 0;
 err_out:
-	rmdir(TOKEN_BPFFS_CUSTOM);
+	rmdir(custom_dir);
 	unsetenv(TOKEN_ENVVAR);
 	return -EINVAL;
 }