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Add test program for pseudofs's DeviceID

This commit is contained in:
Chaoqun Zheng 2026-01-31 22:11:49 +08:00
parent 6d2ff13a63
commit 9652538807
2 changed files with 123 additions and 0 deletions
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118
test/initramfs/src/apps/pseudofs/pseudo_dev_id.c Normal file
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@ -0,0 +1,118 @@
// SPDX-License-Identifier: MPL-2.0
#define _GNU_SOURCE
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <sys/types.h>
#include "../test.h"
struct dev_id {
unsigned int major;
unsigned int minor;
dev_t st_dev;
};
static int get_dev_id(const char *path, struct dev_id *dev_id)
{
struct stat st;
if (stat(path, &st) < 0) {
return -1;
}
dev_id->st_dev = st.st_dev;
dev_id->major = major(st.st_dev);
dev_id->minor = minor(st.st_dev);
return 0;
}
static int dev_id_equal(const struct dev_id *a, const struct dev_id *b)
{
return a->st_dev == b->st_dev;
}
FN_TEST(pseudo_fs_dev_id_major_is_zero)
{
struct dev_id dev_id;
TEST_SUCC(get_dev_id("/proc", &dev_id));
TEST_RES(dev_id.major, _ret == 0);
TEST_SUCC(get_dev_id("/sys", &dev_id));
TEST_RES(dev_id.major, _ret == 0);
TEST_SUCC(get_dev_id("/dev/pts", &dev_id));
TEST_RES(dev_id.major, _ret == 0);
TEST_SUCC(get_dev_id("/sys/fs/cgroup", &dev_id));
TEST_RES(dev_id.major, _ret == 0);
TEST_SUCC(get_dev_id("/sys/kernel/config", &dev_id));
TEST_RES(dev_id.major, _ret == 0);
TEST_SUCC(get_dev_id("/dev", &dev_id));
TEST_RES(dev_id.major, _ret == 0);
}
END_TEST()
FN_TEST(pseudo_fs_dev_id_minor_is_positive)
{
struct dev_id dev_id;
TEST_SUCC(get_dev_id("/proc", &dev_id));
TEST_RES(dev_id.minor, _ret > 0);
TEST_SUCC(get_dev_id("/sys", &dev_id));
TEST_RES(dev_id.minor, _ret > 0);
TEST_SUCC(get_dev_id("/dev/pts", &dev_id));
TEST_RES(dev_id.minor, _ret > 0);
TEST_SUCC(get_dev_id("/sys/fs/cgroup", &dev_id));
TEST_RES(dev_id.minor, _ret > 0);
TEST_SUCC(get_dev_id("/sys/kernel/config", &dev_id));
TEST_RES(dev_id.minor, _ret > 0);
TEST_SUCC(get_dev_id("/dev", &dev_id));
TEST_RES(dev_id.minor, _ret > 0);
}
END_TEST()
FN_TEST(pseudo_fs_dev_id_unique_per_mount)
{
struct dev_id dev_ids[6];
TEST_SUCC(get_dev_id("/proc", &dev_ids[0]));
TEST_SUCC(get_dev_id("/sys", &dev_ids[1]));
TEST_SUCC(get_dev_id("/dev/pts", &dev_ids[2]));
TEST_SUCC(get_dev_id("/sys/fs/cgroup", &dev_ids[3]));
TEST_SUCC(get_dev_id("/sys/kernel/config", &dev_ids[4]));
TEST_SUCC(get_dev_id("/dev", &dev_ids[5]));
// Test that each pseudo filesystem has a unique device ID
for (int i = 0; i < 6; i++) {
for (int j = i + 1; j < 6; j++) {
TEST_RES(0, !dev_id_equal(&dev_ids[i], &dev_ids[j]));
}
}
}
END_TEST()
FN_TEST(pseudo_fs_files_share_same_container_dev_id)
{
struct dev_id dev_id_proc_self, dev_id_proc_cpuinfo;
struct dev_id dev_id_sys_kernel, dev_id_sys_fs;
// Files in the same pseudo fs should share the same container dev_id
TEST_SUCC(get_dev_id("/proc/self", &dev_id_proc_self));
TEST_SUCC(get_dev_id("/proc/cpuinfo", &dev_id_proc_cpuinfo));
TEST_RES(0, dev_id_equal(&dev_id_proc_self, &dev_id_proc_cpuinfo));
TEST_SUCC(get_dev_id("/sys/kernel", &dev_id_sys_kernel));
TEST_SUCC(get_dev_id("/sys/fs", &dev_id_sys_fs));
TEST_RES(0, dev_id_equal(&dev_id_sys_kernel, &dev_id_sys_fs));
}
END_TEST()

5
test/initramfs/src/apps/scripts/fs.sh
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@ -111,3 +111,8 @@ devfs/full
devfs/random
devfs/framebuffer
devfs/evdev
pseudofs/memfd_access_err
pseudofs/pseudo_dentry
pseudofs/pseudo_dev_id
pseudofs/pseudo_inode
pseudofs/pseudo_mount