* directories and then just exit.
*
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
#include <sys/stat.h>
#include "logging.h"
+#include "udev_version.h"
+#include "udev_sysfs.h"
#include "libsysfs/sysfs/libsysfs.h"
#ifdef LOG
}
#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)
-{
- 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 },
- { NULL, NULL }
- };
- struct class_file *classfile;
- const char *file = "dev";
- 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;
- }
- }
- dbg("looking at class '%s' for specific file '%s'", class_dev->classname, file);
-
- loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
- while (--loop) {
- if (sysfs_get_classdev_attr(class_dev, file) != NULL) {
- 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);
- return -1;
-}
-
-/* skip waiting for physical device */
-static int class_device_expect_no_device_link(struct sysfs_class_device *class_dev)
-{
- static char *devices_without_link[] = {
- "nb",
- "ram",
- "loop",
- "fd",
- "md",
- "dos_cd",
- "double",
- "flash",
- "msd",
- "rflash",
- "rom",
- "rrom",
- "sbpcd",
- "pcd",
- "pf",
- "scd",
- "sit",
- "lp",
- "ubd",
- "vcs",
- "vcsa",
- "console",
- "tty",
- "ttyS",
- NULL
- };
- char **device;
-
- for (device = devices_without_link; *device != NULL; device++) {
- int len = strlen(*device);
-
- /* look if name matches */
- if (strncmp(class_dev->name, *device, len) != 0)
- continue;
-
- /* exact match */
- if (strlen(class_dev->name) == len)
- return 1;
-
- /* instance numbers are matching too */
- 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",
- 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 *device_dev)
-{
- 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" },
- { NULL }
- };
- struct bus_file *busfile;
- int loop;
-
- /* wait for the /bus-device link to the /device-device */
- loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
- while (--loop) {
- if (sysfs_get_device_bus(device_dev) == 0)
- break;
-
- usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
- }
- if (loop == 0) {
- dbg("error: getting /bus-device link");
- return -1;
- }
- dbg("/bus-device link found for bus '%s'", device_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(device_dev->bus, busfile->bus) == 0) {
- found = 1;
- dbg("looking at bus '%s' for specific file '%s'", device_dev->bus, busfile->file);
- if (sysfs_get_device_attr(device_dev, busfile->file) != NULL) {
- dbg("bus '%s' specific file '%s' found", device_dev->bus, busfile->file);
- return 0;
- }
- }
- }
- if (found == 0) {
- info("error: unknown bus, please report to "
- "<linux-hotplug-devel@lists.sourceforge.net> '%s'", device_dev->bus);
- return -1;
- }
- usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
- }
-
- dbg("error: getting bus '%s' specific file '%s'", device_dev->bus, busfile->file);
- return -1;
-}
-
int main(int argc, char *argv[], char *envp[])
{
const char *devpath = "";
const char *action;
const char *subsystem;
- char sysfs_path[SYSFS_PATH_MAX];
+ char sysfs_mnt_path[SYSFS_PATH_MAX];
char filename[SYSFS_PATH_MAX];
struct sysfs_class_device *class_dev;
- struct sysfs_class_device *class_dev_parent;
- struct sysfs_device *device_dev = NULL;
- int loop;
+ struct sysfs_device *devices_dev;
int rc = 0;
+ const char *error = NULL;
- init_logging("wait_for_sysfs");
+ logging_init("wait_for_sysfs");
if (argc != 2) {
dbg("error: subsystem");
devpath = getenv ("DEVPATH");
if (!devpath) {
dbg("error: no DEVPATH");
- return 1;
+ rc = 1;
+ goto exit;
}
action = getenv ("ACTION");
if (!action) {
dbg("error: no ACTION");
- return 1;
+ rc = 1;
+ goto exit;
}
/* we only wait on an add event */
- if (strcmp(action, "add") != 0)
- return 0;
+ if (strcmp(action, "add") != 0) {
+ dbg("no add ACTION");
+ goto exit;
+ }
- if (sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX) != 0) {
+ if (sysfs_get_mnt_path(sysfs_mnt_path, SYSFS_PATH_MAX) != 0) {
dbg("error: no sysfs path");
- return 2;
+ rc = 2;
+ goto exit;
}
if ((strncmp(devpath, "/block/", 7) == 0) || (strncmp(devpath, "/class/", 7) == 0)) {
- /* open the class device we are called for */
- snprintf(filename, SYSFS_PATH_MAX-1, "%s%s", sysfs_path, devpath);
+ snprintf(filename, SYSFS_PATH_MAX-1, "%s%s", sysfs_mnt_path, devpath);
filename[SYSFS_PATH_MAX-1] = '\0';
- loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
- while (--loop) {
- class_dev = sysfs_open_class_device_path(filename);
- if (class_dev)
- break;
-
- usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
- }
- if (class_dev == NULL) {
- dbg("error: getting class_device");
- rc = 3;
+ /* skip bad events where we get no device for the class */
+ if (strncmp(devpath, "/class/", 7) == 0 && strchr(&devpath[7], '/') == NULL) {
+ dbg("no device name for '%s', bad event", devpath);
goto exit;
}
- dbg("class_device opened '%s'", filename);
-
- if (wait_for_class_device_attributes(class_dev) != 0) {
- rc = 4;
- goto exit_class;
- }
- /* skip devices without /device-link */
- if (class_device_expect_no_device_link(class_dev)) {
- dbg("no device symlink expected for '%s', ", class_dev->name);
- goto exit_class;
- }
-
- /* 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 /device-device */
- dbg("waiting for symlink to /device-device");
- loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
- while (--loop) {
- if (class_dev_parent)
- device_dev = sysfs_get_classdev_device(class_dev_parent);
- else
- device_dev = sysfs_get_classdev_device(class_dev);
-
- if (device_dev)
- break;
-
- usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
- }
- if (device_dev == NULL) {
- dbg("error: getting /device-device");
- rc = 5;
- goto exit_class;
+ /* open the class device we are called for */
+ class_dev = open_class_device_wait(filename);
+ if (!class_dev) {
+ dbg("error: class device unavailable (probably remove has beaten us)");
+ goto exit;
}
- dbg("device symlink found pointing to '%s'", device_dev->path);
+ dbg("class device opened '%s'", filename);
- /* wait for the bus value */
- if (class_device_expect_no_bus(class_dev)) {
- dbg("no bus device expected for '%s', ", class_dev->classname);
- } else {
- if (wait_for_bus_device(device_dev) != 0)
- rc = 6;
- }
+ /* wait for the class device with possible physical device and bus */
+ wait_for_class_device(class_dev, &error);
-exit_class:
sysfs_close_class_device(class_dev);
} else if ((strncmp(devpath, "/devices/", 9) == 0)) {
- /* open the path we are called for */
- snprintf(filename, SYSFS_PATH_MAX-1, "%s%s", sysfs_path, devpath);
+ snprintf(filename, SYSFS_PATH_MAX-1, "%s%s", sysfs_mnt_path, devpath);
filename[SYSFS_PATH_MAX-1] = '\0';
- loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
- while (--loop) {
- device_dev = sysfs_open_device_path(filename);
- if (device_dev)
- break;
-
- usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
- }
- if (device_dev == NULL) {
- dbg("error: getting /device-device");
- rc = 7;
+ /* open the path we are called for */
+ devices_dev = open_devices_device_wait(filename);
+ if (!devices_dev) {
+ dbg("error: devices device unavailable (probably remove has beaten us)");
goto exit;
}
- dbg("device_device opened '%s'", filename);
+ dbg("devices device opened '%s'", filename);
/* wait for the bus value */
- if (wait_for_bus_device(device_dev) != 0)
- rc = 8;
+ wait_for_bus_device(devices_dev, &error);
- sysfs_close_device(device_dev);
+ sysfs_close_device(devices_dev);
} else {
dbg("unhandled sysfs path, no need to wait");
}
exit:
- if (rc == 0)
+ if (error) {
+ info("either wait_for_sysfs (udev %s) needs an update to handle the device '%s' "
+ "properly (%s) or the sysfs-support of your device's driver needs to be fixed, "
+ "please report to <linux-hotplug-devel@lists.sourceforge.net>",
+ UDEV_VERSION, devpath, error);
+ rc =3;
+ } else {
dbg("result: waiting for sysfs successful '%s'", devpath);
- else
- info("error: wait_for_sysfs needs an update to handle the device '%s' "
- "properly, please report to <linux-hotplug-devel@lists.sourceforge.net>",
- devpath);
+ }
- return rc;
+ logging_close();
+ exit(rc);
}
~ianmdlvl / elogind.git / blobdiff