1 // SPDX-License-Identifier: GPL-2.0
2 /* Test triggering of loading of firmware from different mount
3  * namespaces. Expect firmware to be always loaded from the mount
31 	umount("/lib/firmware");  in die()
57 	if (write(fd, fw, sizeof(fw) -1) != sizeof(fw) -1)  in setup_fw()
68 		if (mount("test", "/lib/firmware", "tmpfs", MS_RDONLY, NULL) == -1)  in test_fw_in_ns()
69 			die("blocking firmware in parent ns failed\n");  in test_fw_in_ns()
72 	if (child == -1) {  in test_fw_in_ns()
81 		if (pid == -1) {  in test_fw_in_ns()
93 			umount("/lib/firmware");  in test_fw_in_ns()
101 	if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL) == -1)  in test_fw_in_ns()
102 		die("remount root in child ns failed\n");  in test_fw_in_ns()
105 		if (mount("test", "/lib/firmware", "tmpfs", MS_RDONLY, NULL) == -1)  in test_fw_in_ns()
106 			die("blocking firmware in child ns failed\n");  in test_fw_in_ns()
108 		umount("/lib/firmware");  in test_fw_in_ns()
117 	const char *fw_name = "test-firmware.bin";  in main()
122 	/* Mount tmpfs to /lib/firmware so we don't have to assume  in main()
124 	if (mount("test", "/lib/firmware", "tmpfs", 0, NULL) == -1)  in main()
125 		die("mounting tmpfs to /lib/firmware failed\n");  in main()
128 	if (asprintf(&fw_path, "/lib/firmware/%s", fw_name) < 0)  in main()
134 	/* Positive case: firmware in PID1 mount namespace */  in main()
135 	printf("Testing with firmware in parent namespace (assumed to be same file system as PID1)\n");  in main()
137 		die("error: failed to access firmware\n");  in main()
139 	/* Negative case: firmware in child mount namespace, expected to fail */  in main()
140 	printf("Testing with firmware in child namespace\n");  in main()
142 		die("error: firmware access did not fail\n");  in main()
146 	umount("/lib/firmware");  in main()