#include "logging.h"
#include "udev_version.h"
+#include "udev_sysfs.h"
#include "libsysfs/sysfs/libsysfs.h"
-#ifndef FILENAME_MAX
-#define FILENAME_MAX 4096
-#endif
-
#ifdef LOG
unsigned char logname[LOGNAME_SIZE];
void log_message(int level, const char *format, ...)
}
#endif
-#define WAIT_MAX_SECONDS 5
-#define WAIT_LOOP_PER_SECOND 20
-
-/* wait for specific file to show up, normally the "dev"-file */
-static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev,
- const char **error)
-{
- static struct class_file {
- char *subsystem;
- char *file;
- } class_files[] = {
- { .subsystem = "net", .file = "ifindex" },
- { .subsystem = "scsi_host", .file = "unique_id" },
- { .subsystem = "scsi_device", .file = NULL },
- { .subsystem = "pcmcia_socket", .file = "card_type" },
- { .subsystem = "usb_host", .file = NULL },
- { .subsystem = "bluetooth", .file = "address" },
- { .subsystem = "firmware", .file = "data" },
- { .subsystem = "i2c-adapter", .file = NULL },
- { .subsystem = "pci_bus", .file = NULL },
- { .subsystem = "ieee1394", .file = NULL },
- { .subsystem = "ieee1394_host", .file = NULL },
- { .subsystem = "ieee1394_node", .file = NULL },
- { NULL, NULL }
- };
- struct class_file *classfile;
- char *file = "dev";
- char filename[FILENAME_MAX];
- int loop;
-
- /* look if we want to look for another file instead of "dev" */
- for (classfile = class_files; classfile->subsystem != NULL; classfile++) {
- if (strcmp(class_dev->classname, classfile->subsystem) == 0) {
- if (classfile->file == NULL) {
- dbg("class '%s' has no file to wait for", class_dev->classname);
- return 0;
- }
- file = classfile->file;
- break;
- }
- }
-
- strcpy(filename, class_dev->path);
- strcat(filename, "/");
- strcat(filename, file);
- dbg("looking at class '%s' for specific file '%s' with full name %s", class_dev->classname, class_dev->path, filename);
-
- loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
- while (--loop) {
- struct stat stats;
-
- if (stat(class_dev->path, &stats) == -1) {
- dbg("'%s' now disappeared (probably remove has beaten us)", class_dev->path);
- return -ENODEV;
- }
-
- if (stat(filename, &stats) == 0) {
- dbg("class '%s' specific file '%s' found", class_dev->classname, file);
- return 0;
- }
-
- usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
- }
-
- dbg("error: getting class '%s' specific file '%s'", class_dev->classname, file);
- *error = "class specific file unavailable";
- return -ENOENT;
-}
-
-/* check if we need to wait for a physical device */
-static int class_device_expect_no_device_link(struct sysfs_class_device *class_dev)
-{
- /* list of devices without a "device" symlink to the physical device
- * if device is set to NULL, no devices in that subsystem has a link */
- static struct class_device {
- char *subsystem;
- char *device;
- } class_device[] = {
- { .subsystem = "block", .device = "double" },
- { .subsystem = "block", .device = "nb" },
- { .subsystem = "block", .device = "ram" },
- { .subsystem = "block", .device = "loop" },
- { .subsystem = "block", .device = "fd" },
- { .subsystem = "block", .device = "md" },
- { .subsystem = "block", .device = "dos_cd" },
- { .subsystem = "block", .device = "rflash" },
- { .subsystem = "block", .device = "rom" },
- { .subsystem = "block", .device = "rrom" },
- { .subsystem = "block", .device = "flash" },
- { .subsystem = "block", .device = "msd" },
- { .subsystem = "block", .device = "sbpcd" },
- { .subsystem = "block", .device = "pcd" },
- { .subsystem = "block", .device = "pf" },
- { .subsystem = "block", .device = "scd" },
- { .subsystem = "block", .device = "ubd" },
- { .subsystem = "block", .device = "dm-" },
- { .subsystem = "input", .device = "event" },
- { .subsystem = "input", .device = "mice" },
- { .subsystem = "input", .device = "mouse" },
- { .subsystem = "input", .device = "ts" },
- { .subsystem = "vc", .device = NULL },
- { .subsystem = "tty", .device = NULL },
- { .subsystem = "cpuid", .device = "cpu" },
- { .subsystem = "graphics", .device = "fb" },
- { .subsystem = "mem", .device = NULL },
- { .subsystem = "misc", .device = NULL },
- { .subsystem = "msr", .device = NULL },
- { .subsystem = "netlink", .device = NULL },
- { .subsystem = "net", .device = "sit" },
- { .subsystem = "net", .device = "lo" },
- { .subsystem = "net", .device = "tap" },
- { .subsystem = "net", .device = "ipsec" },
- { .subsystem = "net", .device = "dummy" },
- { .subsystem = "net", .device = "irda" },
- { .subsystem = "net", .device = "ppp" },
- { .subsystem = "ppp", .device = NULL },
- { .subsystem = "sound", .device = NULL },
- { .subsystem = "printer", .device = "lp" },
- { .subsystem = "nvidia", .device = NULL },
- { .subsystem = "video4linux", .device = "vbi" },
- { .subsystem = "lirc", .device = NULL },
- { .subsystem = "firmware", .device = NULL },
- { .subsystem = "drm", .device = NULL },
- { .subsystem = "pci_bus", .device = NULL },
- { .subsystem = "ieee1394", .device = NULL },
- { .subsystem = "ieee1394_host", .device = NULL },
- { .subsystem = "ieee1394_node", .device = NULL },
- { .subsystem = "raw", .device = NULL },
- { NULL, NULL }
- };
- struct class_device *classdevice;
- int len;
-
- for (classdevice = class_device; classdevice->subsystem != NULL; classdevice++) {
- if (strcmp(class_dev->classname, classdevice->subsystem) == 0) {
- /* see if no device in this class is expected to have a device-link */
- if (classdevice->device == NULL)
- return 1;
-
- len = strlen(classdevice->device);
-
- /* see if device name matches */
- if (strncmp(class_dev->name, classdevice->device, len) != 0)
- continue;
-
- /* exact name match */
- if (strlen(class_dev->name) == len)
- return 1;
-
- /* name match with instance number */
- if (isdigit(class_dev->name[len]))
- return 1;
- }
- }
-
- return 0;
-}
-
-/* skip waiting for the bus */
-static int class_device_expect_no_bus(struct sysfs_class_device *class_dev)
-{
- static char *devices_without_bus[] = {
- "scsi_host",
- "i2c-adapter",
- NULL
- };
- char **device;
-
- for (device = devices_without_bus; *device != NULL; device++) {
- int len = strlen(*device);
-
- if (strncmp(class_dev->classname, *device, len) == 0)
- return 1;
- }
-
- return 0;
-}
-
-/* wait for the bus and for a bus specific file to show up */
-static int wait_for_bus_device(struct sysfs_device *devices_dev,
- const char **error)
-{
- static struct bus_file {
- char *bus;
- char *file;
- } bus_files[] = {
- { .bus = "scsi", .file = "vendor" },
- { .bus = "usb", .file = "idVendor" },
- { .bus = "usb", .file = "iInterface" },
- { .bus = "usb", .file = "bNumEndpoints" },
- { .bus = "usb-serial", .file = "detach_state" },
- { .bus = "ide", .file = "detach_state" },
- { .bus = "pci", .file = "vendor" },
- { .bus = "platform", .file = "detach_state" },
- { .bus = "i2c", .file = "detach_state" },
- { NULL }
- };
- struct bus_file *busfile;
- int loop;
-
- /* wait for the bus device link to the devices device */
- loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
- while (--loop) {
- if (sysfs_get_device_bus(devices_dev) == 0)
- break;
-
- usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
- }
- if (loop == 0) {
- dbg("error: getting bus device link");
- *error = "no bus device link";
- return -1;
- }
- dbg("bus device link found for bus '%s'", devices_dev->bus);
-
- /* wait for a bus specific file to show up */
- loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
- while (--loop) {
- int found = 0;
-
- for (busfile = bus_files; busfile->bus != NULL; busfile++) {
- if (strcmp(devices_dev->bus, busfile->bus) == 0) {
- found = 1;
- dbg("looking at bus '%s' for specific file '%s'", devices_dev->bus, busfile->file);
- if (sysfs_get_device_attr(devices_dev, busfile->file) != NULL) {
- dbg("bus '%s' specific file '%s' found", devices_dev->bus, busfile->file);
- return 0;
- }
- }
- }
- if (found == 0) {
- *error = "unknown bus";
- info("error: unknown bus, please report to "
- "<linux-hotplug-devel@lists.sourceforge.net> '%s'", devices_dev->bus);
- return -1;
- }
- usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
- }
-
- dbg("error: getting bus '%s' specific file '%s'", devices_dev->bus, busfile->file);
- *error = "bus specific file unavailable";
- return -1;
-}
-
-
-static struct sysfs_class_device *open_class_device(const char *path)
-{
- struct sysfs_class_device *class_dev;
- int loop;
-
- loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
- while (--loop) {
- class_dev = sysfs_open_class_device_path(path);
- if (class_dev)
- break;
-
- usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
- }
-
- return (class_dev);
-}
-
-static int wait_for_class_device(struct sysfs_class_device *class_dev,
- const char **error)
-{
- struct sysfs_class_device *class_dev_parent;
- struct sysfs_device *devices_dev = NULL;
- int loop;
-
- if (wait_for_class_device_attributes(class_dev, error) != 0)
- return -ENOENT;
-
- /* skip devices without devices-link */
- if (class_device_expect_no_device_link(class_dev)) {
- dbg("no device symlink expected for '%s', ", class_dev->name);
- return -ENODEV;
- }
-
- /* the symlink may be on the parent device */
- class_dev_parent = sysfs_get_classdev_parent(class_dev);
- if (class_dev_parent)
- dbg("looking at parent device for device link '%s'", class_dev_parent->path);
-
- /* wait for the symlink to the devices device */
- dbg("waiting for symlink to devices device");
- loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
- while (--loop) {
- if (class_dev_parent)
- devices_dev = sysfs_get_classdev_device(class_dev_parent);
- else
- devices_dev = sysfs_get_classdev_device(class_dev);
-
- if (devices_dev)
- break;
-
- usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
- }
- if (!devices_dev) {
- dbg(" error: no devices device symlink found");
- *error = "no device symlink";
- return -ENODEV;
- }
- dbg("device symlink found pointing to '%s'", devices_dev->path);
-
- /* wait for the bus value */
- if (class_device_expect_no_bus(class_dev)) {
- dbg("no bus device expected for '%s', ", class_dev->classname);
- return 0;
- } else {
- return wait_for_bus_device(devices_dev, error);
- }
-}
-
-static struct sysfs_device *open_devices_device(const char *path)
-{
- struct sysfs_device *devices_dev;
- int loop;
-
- loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
- while (--loop) {
- devices_dev = sysfs_open_device_path(path);
- if (devices_dev)
- break;
-
- usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
- }
-
- return(devices_dev);
-}
-
int main(int argc, char *argv[], char *envp[])
{
const char *devpath = "";
filename[SYSFS_PATH_MAX-1] = '\0';
/* open the class device we are called for */
- class_dev = open_class_device(filename);
+ class_dev = open_class_device_wait(filename);
if (!class_dev) {
dbg("error: class device unavailable (probably remove has beaten us)");
goto exit;
filename[SYSFS_PATH_MAX-1] = '\0';
/* open the path we are called for */
- devices_dev = open_devices_device(filename);
+ devices_dev = open_devices_device_wait(filename);
if (!devices_dev) {
dbg("error: devices device unavailable (probably remove has beaten us)");
goto exit;
~ianmdlvl / elogind.git / blobdiff