#include <sys/stat.h>
#include <sys/types.h>
#include <grp.h>
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <linux/sockios.h>
#ifndef __KLIBC__
#include <pwd.h>
#include <utmp.h>
#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
+#include "udev_lib.h"
#include "udev_version.h"
-#include "udev_dbus.h"
-#include "udev_selinux.h"
#include "logging.h"
#include "namedev.h"
#include "udevdb.h"
*/
static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice *udev)
{
- int retval = -ENODEV;
struct sysfs_attribute *attr = NULL;
attr = sysfs_get_classdev_attr(class_dev, "dev");
if (attr == NULL)
- goto exit;
+ goto error;
dbg("dev='%s'", attr->value);
if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2)
- goto exit;
+ goto error;
dbg("found major=%d, minor=%d", udev->major, udev->minor);
- retval = 0;
-exit:
- return retval;
+ return 0;
+error:
+ return -1;
}
static int create_path(char *file)
return 0;
}
-static int make_node(char *filename, int major, int minor, unsigned int mode, uid_t uid, gid_t gid)
+static int make_node(char *file, int major, int minor, unsigned int mode, uid_t uid, gid_t gid)
{
- int retval;
+ struct stat stats;
+ int retval = 0;
+
+ if (stat(file, &stats) != 0)
+ goto create;
+
+ /* preserve node with already correct numbers, to not change the inode number */
+ if (((stats.st_mode & S_IFMT) == S_IFBLK || (stats.st_mode & S_IFMT) == S_IFCHR) &&
+ (stats.st_rdev == makedev(major, minor))) {
+ dbg("preserve file '%s', cause it has correct dev_t", file);
+ goto perms;
+ }
- retval = mknod(filename, mode, makedev(major, minor));
+ if (unlink(file) != 0)
+ dbg("unlink(%s) failed with error '%s'", file, strerror(errno));
+ else
+ dbg("already present file '%s' unlinked", file);
+
+create:
+ retval = mknod(file, mode, makedev(major, minor));
if (retval != 0) {
dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
- filename, mode, major, minor, strerror(errno));
- return retval;
+ file, mode, major, minor, strerror(errno));
+ goto exit;
}
- dbg("chmod(%s, %#o)", filename, mode);
- retval = chmod(filename, mode);
- if (retval != 0) {
- dbg("chmod(%s, %#o) failed with error '%s'",
- filename, mode, strerror(errno));
- return retval;
+perms:
+ dbg("chmod(%s, %#o)", file, mode);
+ if (chmod(file, mode) != 0) {
+ dbg("chmod(%s, %#o) failed with error '%s'", file, mode, strerror(errno));
+ goto exit;
}
if (uid != 0 || gid != 0) {
- dbg("chown(%s, %u, %u)", filename, uid, gid);
- retval = chown(filename, uid, gid);
- if (retval != 0) {
+ dbg("chown(%s, %u, %u)", file, uid, gid);
+ if (chown(file, uid, gid) != 0) {
dbg("chown(%s, %u, %u) failed with error '%s'",
- filename, uid, gid, strerror(errno));
- return retval;
+ file, uid, gid, strerror(errno));
+ goto exit;
}
}
- return 0;
+exit:
+ return retval;
}
/* get the local logged in user */
endutent();
}
-/* Used to unlink existing files to ensure that our new file/symlink is created */
-static int unlink_entry(char *filename)
-{
- struct stat stats;
- int retval = 0;
-
- if (lstat(filename, &stats) == 0) {
- if ((stats.st_mode & S_IFMT) != S_IFDIR) {
- retval = unlink(filename);
- if (retval) {
- dbg("unlink(%s) failed with error '%s'",
- filename, strerror(errno));
- }
- }
- }
- return retval;
-}
-
static int create_node(struct udevice *dev, int fake)
{
char filename[NAME_SIZE];
char linkname[NAME_SIZE];
char linktarget[NAME_SIZE];
char partitionname[NAME_SIZE];
- int retval = 0;
uid_t uid = 0;
gid_t gid = 0;
int i;
}
if (!fake) {
- unlink_entry(filename);
info("creating device node '%s'", filename);
- make_node(filename, dev->major, dev->minor, dev->mode, uid, gid);
+ if (make_node(filename, dev->major, dev->minor, dev->mode, uid, gid) != 0)
+ goto error;
} else {
info("creating device node '%s', major = '%d', minor = '%d', "
"mode = '%#o', uid = '%d', gid = '%d'", filename,
dev->major, dev->minor, (mode_t)dev->mode, uid, gid);
}
- /* create partitions if requested */
+ /* create all_partitions if requested */
if (dev->partitions > 0) {
info("creating device partition nodes '%s[1-%i]'", filename, dev->partitions);
if (!fake) {
for (i = 1; i <= dev->partitions; i++) {
strfieldcpy(partitionname, filename);
strintcat(partitionname, i);
- unlink_entry(partitionname);
make_node(partitionname, dev->major,
dev->minor + i, dev->mode, uid, gid);
}
}
}
- if (!fake)
- selinux_add_node(filename);
-
- /* create symlink if requested */
+ /* create symlink(s) if requested */
foreach_strpart(dev->symlink, " ", pos, len) {
strfieldcpymax(linkname, pos, len+1);
strfieldcpy(filename, udev_root);
strfieldcat(linktarget, &dev->name[tail]);
- if (!fake)
- unlink_entry(filename);
-
dbg("symlink(%s, %s)", linktarget, filename);
if (!fake) {
- retval = symlink(linktarget, filename);
- if (retval != 0)
+ unlink(filename);
+ if (symlink(linktarget, filename) != 0)
dbg("symlink(%s, %s) failed with error '%s'",
linktarget, filename, strerror(errno));
}
}
- return retval;
+ return 0;
+error:
+ return -1;
}
-static struct sysfs_class_device *get_class_dev(char *device_name)
+static struct sysfs_class_device *get_class_dev(const char *device_name)
{
char dev_path[SYSFS_PATH_MAX];
struct sysfs_class_device *class_dev = NULL;
/* wait for the "dev" file to show up in the directory in sysfs.
* If it doesn't happen in about 10 seconds, give up.
*/
-#define SECONDS_TO_WAIT_FOR_DEV 10
-static int sleep_for_dev(char *path)
+#define SECONDS_TO_WAIT_FOR_FILE 10
+static int sleep_for_file(const char *path, char* file)
{
char filename[SYSFS_PATH_MAX + 6];
- int loop = SECONDS_TO_WAIT_FOR_DEV;
+ int loop = SECONDS_TO_WAIT_FOR_FILE;
int retval;
strfieldcpy(filename, sysfs_path);
strfieldcat(filename, path);
- strfieldcat(filename, "/dev");
+ strfieldcat(filename, file);
while (loop--) {
struct stat buf;
return retval;
}
-int udev_add_device(char *path, char *subsystem, int fake)
+static int rename_net_if(struct udevice *dev, int fake)
{
- struct sysfs_class_device *class_dev = NULL;
+ int sk;
+ struct ifreq ifr;
+ int retval;
+
+ dbg("changing net interface name from '%s' to '%s'", dev->kernel_name, dev->name);
+ if (fake)
+ return 0;
+
+ sk = socket(PF_INET, SOCK_DGRAM, 0);
+ if (sk < 0) {
+ dbg("error opening socket");
+ return -1;
+ }
+
+ memset(&ifr, 0x00, sizeof(struct ifreq));
+ strfieldcpy(ifr.ifr_name, dev->kernel_name);
+ strfieldcpy(ifr.ifr_newname, dev->name);
+
+ retval = ioctl(sk, SIOCSIFNAME, &ifr);
+ if (retval != 0)
+ dbg("error changing net interface name");
+ close(sk);
+
+ return retval;
+}
+
+int udev_add_device(const char *path, const char *subsystem, int fake)
+{
+ struct sysfs_class_device *class_dev;
struct udevice dev;
- int retval = -EINVAL;
+ char devpath[DEVPATH_SIZE];
+ char *pos;
+ int retval;
memset(&dev, 0x00, sizeof(dev));
- /* for now, the block layer is the only place where block devices are */
- if (strcmp(subsystem, "block") == 0)
- dev.type = 'b';
- else
- dev.type = 'c';
+ dev.type = get_device_type(path, subsystem);
+ switch (dev.type) {
+ case 'b':
+ case 'c':
+ retval = sleep_for_file(path, "/dev");
+ break;
- retval = sleep_for_dev(path);
- if (retval != 0)
- goto exit;
+ case 'n':
+ retval = sleep_for_file(path, "/address");
+ break;
+
+ default:
+ dbg("unknown device type '%c'", dev.type);
+ return -1;
+ }
class_dev = get_class_dev(path);
if (class_dev == NULL)
- goto exit;
+ return -1;
- retval = get_major_minor(class_dev, &dev);
- if (retval != 0) {
- dbg("get_major_minor failed");
- goto exit;
+ if (dev.type == 'b' || dev.type == 'c') {
+ retval = get_major_minor(class_dev, &dev);
+ if (retval != 0) {
+ dbg("get_major_minor failed");
+ goto exit;
+ }
}
- retval = namedev_name_device(class_dev, &dev);
- if (retval != 0)
+ if (namedev_name_device(class_dev, &dev) != 0)
goto exit;
- if (!fake) {
- retval = udevdb_add_dev(path, &dev);
+ dbg("name='%s'", dev.name);
+
+ switch (dev.type) {
+ case 'b':
+ case 'c':
+ retval = create_node(&dev, fake);
if (retval != 0)
+ goto exit;
+ if ((!fake) && (udevdb_add_dev(path, &dev) != 0))
dbg("udevdb_add_dev failed, but we are going to try "
"to create the node anyway. But remove might not "
"work properly for this device.");
- }
- dbg("name='%s'", dev.name);
- retval = create_node(&dev, fake);
+ dev_d_send(&dev, subsystem, path);
+ break;
+
+ case 'n':
+ strfieldcpy(devpath, path);
+ if (strcmp(dev.name, dev.kernel_name) != 0) {
+ retval = rename_net_if(&dev, fake);
+ if (retval != 0)
+ goto exit;
+ /* netif's are keyed with the configured name, cause
+ * the original kernel name sleeps with the fishes
+ */
+ pos = strrchr(devpath, '/');
+ if (pos != NULL) {
+ pos[1] = '\0';
+ strfieldcat(devpath, dev.name);
+ }
+ }
+ if ((!fake) && (udevdb_add_dev(devpath, &dev) != 0))
+ dbg("udevdb_add_dev failed");
- if ((retval == 0) && (!fake))
- sysbus_send_create(&dev, path);
+ dev_d_send(&dev, subsystem, devpath);
+ break;
+ }
exit:
- if (class_dev)
- sysfs_close_class_device(class_dev);
+ sysfs_close_class_device(class_dev);
return retval;
}
~ianmdlvl / elogind.git / blobdiff