/*
- * udev_device.c - main udev data object
- *
* Copyright (C) 2004-2006 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software; you can redistribute it and/or modify it
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
-#include <stropts.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
#include <net/if.h>
#include <linux/sockios.h>
dev_t udev_device_get_devt(struct udevice *udev)
{
const char *attr;
- unsigned int major, minor;
+ unsigned int maj, min;
/* read it from sysfs */
attr = sysfs_attr_get_value(udev->dev->devpath, "dev");
if (attr != NULL) {
- if (sscanf(attr, "%u:%u", &major, &minor) == 2)
- return makedev(major, minor);
+ if (sscanf(attr, "%u:%u", &maj, &min) == 2)
+ return makedev(maj, min);
}
return makedev(0, 0);
}
-static int rename_net_if(struct udevice *udev)
+static int rename_netif(struct udevice *udev)
{
int sk;
struct ifreq ifr;
int retval;
- info("changing net interface name from '%s' to '%s'", udev->dev->kernel_name, udev->name);
+ info("changing net interface name from '%s' to '%s'", udev->dev->kernel, udev->name);
if (udev->test_run)
return 0;
}
memset(&ifr, 0x00, sizeof(struct ifreq));
- strlcpy(ifr.ifr_name, udev->dev->kernel_name, IFNAMSIZ);
+ strlcpy(ifr.ifr_name, udev->dev->kernel, IFNAMSIZ);
strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ);
-
retval = ioctl(sk, SIOCSIFNAME, &ifr);
- if (retval != 0)
- err("error changing net interface name: %s", strerror(errno));
- close(sk);
+ if (retval != 0) {
+ int loop;
+
+ /* see if the destination interface name already exists */
+ if (errno != EEXIST) {
+ err("error changing netif name %s to %s: %s", ifr.ifr_name, ifr.ifr_newname, strerror(errno));
+ goto exit;
+ }
+
+ /* free our own name, another process may wait for us */
+ strlcpy(ifr.ifr_newname, udev->dev->kernel, IFNAMSIZ);
+ strlcat(ifr.ifr_newname, "_rename", IFNAMSIZ);
+ retval = ioctl(sk, SIOCSIFNAME, &ifr);
+ if (retval != 0) {
+ err("error changing netif name %s to %s: %s", ifr.ifr_name, ifr.ifr_newname, strerror(errno));
+ goto exit;
+ }
+
+ /* wait 30 seconds for our target to become available */
+ strlcpy(ifr.ifr_name, ifr.ifr_newname, IFNAMSIZ);
+ strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ);
+ loop = 30 * 20;
+ while (loop--) {
+ retval = ioctl(sk, SIOCSIFNAME, &ifr);
+ if (retval != 0) {
+ if (errno != EEXIST) {
+ err("error changing net interface name %s to %s: %s",
+ ifr.ifr_name, ifr.ifr_newname, strerror(errno));
+ break;
+ }
+ dbg("wait for netif '%s' to become free, loop=%i", udev->name, (30 * 20) - loop);
+ usleep(1000 * 1000 / 20);
+ }
+ }
+ }
+exit:
+ close(sk);
return retval;
}
int retval = 0;
/* add device node */
- if (major(udev->devt) != 0 && strcmp(udev->action, "add") == 0) {
+ if (major(udev->devt) != 0 &&
+ (strcmp(udev->action, "add") == 0 || strcmp(udev->action, "change") == 0)) {
+ struct udevice *udev_old;
+
dbg("device node add '%s'", udev->dev->devpath);
+
udev_rules_get_name(rules, udev);
if (udev->ignore_device) {
info("device event will be ignored");
info("device node creation supressed");
goto exit;
}
- /* create node, store in db */
- retval = udev_node_add(udev);
- if (retval == 0)
+
+ /* read current database entry, we may want to cleanup symlinks */
+ udev_old = udev_device_init();
+ if (udev_old != NULL) {
+ if (udev_db_get_device(udev_old, udev->dev->devpath) != 0) {
+ udev_device_cleanup(udev_old);
+ udev_old = NULL;
+ } else
+ info("device '%s' already in database, validate currently present symlinks",
+ udev->dev->devpath);
+ }
+
+ /* create node and symlinks */
+ retval = udev_node_add(udev, udev_old);
+ if (retval == 0) {
+ /* store record in database */
udev_db_add_device(udev);
+
+ /* remove possibly left-over symlinks */
+ if (udev_old != NULL) {
+ struct name_entry *link_loop;
+ struct name_entry *link_old_loop;
+ struct name_entry *link_old_tmp_loop;
+
+ /* remove still valid symlinks from old list */
+ list_for_each_entry_safe(link_old_loop, link_old_tmp_loop, &udev_old->symlink_list, node)
+ list_for_each_entry(link_loop, &udev->symlink_list, node)
+ if (strcmp(link_old_loop->name, link_loop->name) == 0) {
+ dbg("symlink '%s' still valid, keep it", link_old_loop->name);
+ list_del(&link_old_loop->node);
+ free(link_old_loop);
+ }
+ udev_node_remove_symlinks(udev_old);
+ udev_device_cleanup(udev_old);
+ }
+ }
goto exit;
}
}
/* look if we want to change the name of the netif */
- if (strcmp(udev->name, udev->dev->kernel_name) != 0) {
+ if (strcmp(udev->name, udev->dev->kernel) != 0) {
char *pos;
- retval = rename_net_if(udev);
+ retval = rename_netif(udev);
if (retval != 0)
goto exit;
info("renamed netif to '%s'", udev->name);
+ /* export old name */
+ setenv("INTERFACE_OLD", udev->dev->kernel, 1);
+
/* now fake the devpath, because the kernel name changed silently */
pos = strrchr(udev->dev->devpath, '/');
if (pos != NULL) {
pos[1] = '\0';
strlcat(udev->dev->devpath, udev->name, sizeof(udev->dev->devpath));
- strlcpy(udev->dev->kernel_name, udev->name, sizeof(udev->dev->kernel_name));
+ strlcpy(udev->dev->kernel, udev->name, sizeof(udev->dev->kernel));
setenv("DEVPATH", udev->dev->devpath, 1);
setenv("INTERFACE", udev->name, 1);
}
list_for_each_entry(name_loop, &udev->env_list, node)
putenv(name_loop->name);
} else {
- dbg("'%s' not found in database, using kernel name '%s'", udev->dev->devpath, udev->dev->kernel_name);
- strlcpy(udev->name, udev->dev->kernel_name, sizeof(udev->name));
+ dbg("'%s' not found in database, using kernel name '%s'", udev->dev->devpath, udev->dev->kernel);
+ strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name));
}
udev_rules_get_run(rules, udev);
~ianmdlvl / elogind.git / blobdiff