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
35 	umount("/lib/firmware");  in die()
43 	fd = open(sys_path, O_WRONLY);  in trigger_fw()
45 		die("open failed: %s\n",  in trigger_fw()
57 	fd = open(fw_path, O_WRONLY | O_CREAT, 0600);  in setup_fw()
59 		die("open failed: %s\n",  in setup_fw()
61 	if (write(fd, fw, sizeof(fw) -1) != sizeof(fw) -1)  in setup_fw()
72 		if (mount("test", "/lib/firmware", "tmpfs", MS_RDONLY, NULL) == -1)  in test_fw_in_ns()
73 			die("blocking firmware in parent ns failed\n");  in test_fw_in_ns()
76 	if (child == -1) {  in test_fw_in_ns()
85 		if (pid == -1) {  in test_fw_in_ns()
97 			umount("/lib/firmware");  in test_fw_in_ns()
105 	if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL) == -1)  in test_fw_in_ns()
109 		if (mount("test", "/lib/firmware", "tmpfs", MS_RDONLY, NULL) == -1)  in test_fw_in_ns()
110 			die("blocking firmware in child ns failed\n");  in test_fw_in_ns()
112 		umount("/lib/firmware");  in test_fw_in_ns()
121 	const char *fw_name = "test-firmware.bin";  in main()
126 	/* Mount tmpfs to /lib/firmware so we don't have to assume  in main()
128 	if (mount("test", "/lib/firmware", "tmpfs", 0, NULL) == -1)  in main()
129 		die("mounting tmpfs to /lib/firmware failed\n");  in main()
132 	if (asprintf(&fw_path, "/lib/firmware/%s", fw_name) < 0)  in main()
138 	/* Positive case: firmware in PID1 mount namespace */  in main()
139 	printf("Testing with firmware in parent namespace (assumed to be same file system as PID1)\n");  in main()
141 		die("error: failed to access firmware\n");  in main()
143 	/* Negative case: firmware in child mount namespace, expected to fail */  in main()
144 	printf("Testing with firmware in child namespace\n");  in main()
146 		die("error: firmware access did not fail\n");  in main()
150 	umount("/lib/firmware");  in main()