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selftests/bpf: Set test path for token/obj_priv_implicit_token_envvar

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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>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20241115003853.864397-1-ihor.solodrai@pm.me
This commit is contained in:
Ihor Solodrai 2024-11-15 00:38:55 +00:00 committed by Andrii Nakryiko
parent 379d5ee624
commit f01750aecd
1 changed files with 12 additions and 7 deletions
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19
tools/testing/selftests/bpf/prog_tests/token.c
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@ -828,8 +828,12 @@ 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 +896,7 @@ 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 +914,10 @@ 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 +930,7 @@ 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 +956,11 @@ 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;
}