6 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation version 2 of the License.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 675 Mass Ave, Cambridge, MA 02139, USA.
32 #include "udev_version.h"
35 #include "libsysfs/libsysfs.h"
39 * Right now the major/minor of a device is stored in a file called
41 * The number is stored as:
45 * The value is in hex.
46 * Yes, this will probably change when we go to a bigger major/minor
47 * range, and will have to be changed at that time.
49 static int get_major_minor(struct sysfs_class_device *class_dev, int *major, int *minor)
55 dev = sysfs_get_value_from_attributes(class_dev->directory->attributes, "dev");
61 if (sscanf(dev, "%u:%u", major, minor) != 2)
64 dbg("found major = %d, minor = %d", *major, *minor);
72 * We also want to add some permissions here, and possibly some symlinks
74 static int create_node(char *name, char type, int major, int minor, int mode)
78 strncpy(filename, UDEV_ROOT, sizeof(filename));
79 strncat(filename, name, sizeof(filename));
92 dbg("unknown node type %c\n", type);
96 retval = mknod(filename,mode,makedev(major,minor));
98 dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
99 filename, mode, major, minor, strerror(errno));
103 struct sysfs_class_device *get_class_dev(char *device_name)
105 char sysfs_path[SYSFS_PATH_MAX];
106 char dev_path[SYSFS_PATH_MAX];
108 struct sysfs_class_device *class_dev = NULL;
111 retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
112 dbg("sysfs_path = %s", sysfs_path);
114 dbg("sysfs_get_mnt_path failed");
118 strcpy(dev_path, sysfs_path);
119 strcat(dev_path, device_name);
121 dbg("looking at %s", dev_path);
123 /* open up the sysfs class device for this thing... */
124 class_dev = sysfs_open_class_device(dev_path);
125 if (class_dev == NULL) {
126 dbg ("sysfs_open_class_device failed");
129 dbg("class_dev->name = %s", class_dev->name);
135 int udev_add_device(char *device, char *subsystem)
137 struct sysfs_class_device *class_dev;
138 struct device_attr attr;
139 struct udevice dbdev;
143 int retval = -EINVAL;
145 /* for now, the block layer is the only place where block devices are */
146 if (strcmp(subsystem, "block") == 0)
151 /* sleep for a second or two to give the kernel a chance to
152 * create the dev file
156 class_dev = get_class_dev(device);
157 if (class_dev == NULL)
160 retval = namedev_name_device(class_dev, &attr);
164 retval = get_major_minor(class_dev, &major, &minor);
166 dbg ("get_major_minor failed");
169 memset(&dbdev, 0, sizeof(dbdev));
170 strncpy(dbdev.name, attr.name, NAME_SIZE);
171 strncpy(dbdev.sysfs_path, class_dev->sysdevice->directory->path,
173 strncpy(dbdev.class_dev_name, class_dev->name, NAME_SIZE);
174 if ((sysfs_get_name_from_path(subsystem, dbdev.class_name, NAME_SIZE))
176 strcpy(dbdev.class_name, "unkown");
177 strncpy(dbdev.bus_id, class_dev->sysdevice->bus_id, ID_SIZE);
178 strcpy(dbdev.bus_name, "unknown");
179 if (class_dev->driver != NULL)
180 strncpy(dbdev.driver, class_dev->driver->name, NAME_SIZE);
182 strcpy(dbdev.driver, "unkown");
186 dbdev.mode = attr.mode;
188 sysfs_close_class_device(class_dev);
190 retval = udevdb_add_udevice(&dbdev);
194 return create_node(attr.name, type, major, minor, attr.mode);