1 // SPDX-License-Identifier: GPL-2.0-only
3  * srm_env.c - Access to SRM environment
6  * (C) 2001,2002,2006 by Jan-Benedict Glaw <jbglaw@lug-owl.de>
8  * This driver is a modified version of Erik Mouw's example proc
25 #define BASE_DIR	"srm_environment"	/* Subdir in /proc/		*/
31 MODULE_AUTHOR("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
37 	unsigned long		id;  member
66 	unsigned long	id = (unsigned long)m->private;  in srm_env_proc_show()  local
71 		return -ENOMEM;  in srm_env_proc_show()
73 	ret = callback_getenv(id, page, PAGE_SIZE);  in srm_env_proc_show()
79 		ret = -EFAULT;  in srm_env_proc_show()
93 	unsigned long	id = (unsigned long)pde_data(file_inode(file));  in srm_env_proc_write()  local
98 		return -ENOMEM;  in srm_env_proc_write()
100 	res = -EINVAL;  in srm_env_proc_write()
104 	res = -EFAULT;  in srm_env_proc_write()
109 	ret1 = callback_setenv(id, buf, count);  in srm_env_proc_write()
142 				"SRM->MILO->Linux, which gets "  in srm_env_init()
144 		return -ENODEV;  in srm_env_init()
152 		printk(KERN_ERR "Couldn't create base dir /proc/%s\n",  in srm_env_init()
154 		return -ENOMEM;  in srm_env_init()
158 	 * Create per-name subdirectory  in srm_env_init()
162 		printk(KERN_ERR "Couldn't create dir /proc/%s/%s\n",  in srm_env_init()
168 	 * Create per-number subdirectory  in srm_env_init()
172 		printk(KERN_ERR "Couldn't create dir /proc/%s/%s\n",  in srm_env_init()
182 	while (entry->name && entry->id) {  in srm_env_init()
183 		if (!proc_create_data(entry->name, 0644, named_dir,  in srm_env_init()
184 			     &srm_env_proc_ops, (void *)entry->id))  in srm_env_init()
207 	return -ENOMEM;  in srm_env_init()