From 0d5be398ffd2f47e0b97f33ca2fd96319ee16c9d Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Fri, 17 Mar 2006 01:52:15 +0100 Subject: [PATCH] add udevtrigger to request events for coldplug The shell script can't handle 1000's of devices. --- Makefile | 6 + udevtrigger.8 | 37 +++++ udevtrigger.c | 354 ++++++++++++++++++++++++++++++++++++++++++++++++ udevtrigger.xml | 90 ++++++++++++ 4 files changed, 487 insertions(+) create mode 100644 udevtrigger.8 create mode 100644 udevtrigger.c create mode 100644 udevtrigger.xml diff --git a/Makefile b/Makefile index 9158550e6..ddb74175c 100644 --- a/Makefile +++ b/Makefile @@ -49,6 +49,7 @@ V = PROGRAMS = \ udev \ udevd \ + udevtrigger \ udevsend \ udevcontrol \ udevmonitor \ @@ -84,6 +85,7 @@ MAN_PAGES = \ udev.7 \ udevmonitor.8 \ udevd.8 \ + udevtrigger.8 \ udevsend.8 \ udevtest.8 \ udevinfo.8 \ @@ -265,6 +267,7 @@ install-man: $(INSTALL_DATA) -D udevinfo.8 $(DESTDIR)$(mandir)/man8/udevinfo.8 $(INSTALL_DATA) -D udevtest.8 $(DESTDIR)$(mandir)/man8/udevtest.8 $(INSTALL_DATA) -D udevd.8 $(DESTDIR)$(mandir)/man8/udevd.8 + $(INSTALL_DATA) -D udevtrigger.8 $(DESTDIR)$(mandir)/man8/udevtrigger.8 $(INSTALL_DATA) -D udevmonitor.8 $(DESTDIR)$(mandir)/man8/udevmonitor.8 - ln -f -s udevd.8 $(DESTDIR)$(mandir)/man8/udevcontrol.8 @extras="$(EXTRAS)"; for target in $$extras; do \ @@ -277,6 +280,7 @@ uninstall-man: - rm -f $(DESTDIR)$(mandir)/man8/udevinfo.8 - rm -f $(DESTDIR)$(mandir)/man8/udevtest.8 - rm -f $(DESTDIR)$(mandir)/man8/udevd.8 + - rm -f $(DESTDIR)$(mandir)/man8/udevtrigger.8 - rm -f $(DESTDIR)$(mandir)/man8/udevmonitor.8 - rm -f $(DESTDIR)$(mandir)/man8/udevcontrol.8 @ extras="$(EXTRAS)"; for target in $$extras; do \ @@ -287,6 +291,7 @@ uninstall-man: install-bin: $(INSTALL) -d $(DESTDIR)$(udevdir) $(INSTALL_PROGRAM) -D udevd $(DESTDIR)$(sbindir)/udevd + $(INSTALL_PROGRAM) -D udevtrigger $(DESTDIR)$(sbindir)/udevtrigger $(INSTALL_PROGRAM) -D udevcontrol $(DESTDIR)$(sbindir)/udevcontrol $(INSTALL_PROGRAM) -D udevmonitor $(DESTDIR)$(usrsbindir)/udevmonitor $(INSTALL_PROGRAM) -D udevinfo $(DESTDIR)$(usrbindir)/udevinfo @@ -303,6 +308,7 @@ endif uninstall-bin: - rm -f $(DESTDIR)$(sbindir)/udevd + - rm -f $(DESTDIR)$(sbindir)/udevtrigger - rm -f $(DESTDIR)$(sbindir)/udevcontrol - rm -f $(DESTDIR)$(usrsbindir)/udevmonitor - rm -f $(DESTDIR)$(usrbindir)/udevinfo diff --git a/udevtrigger.8 b/udevtrigger.8 new file mode 100644 index 000000000..a792eaca6 --- /dev/null +++ b/udevtrigger.8 @@ -0,0 +1,37 @@ +.\" ** You probably do not want to edit this file directly ** +.\" It was generated using the DocBook XSL Stylesheets (version 1.69.1). +.\" Instead of manually editing it, you probably should edit the DocBook XML +.\" source for it and then use the DocBook XSL Stylesheets to regenerate it. +.TH "UDEVTRIGGER" "8" "March 2006" "udev" "udevtrigger" +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.SH "NAME" +udevtrigger \- request kernel devices events for coldplug +.SH "SYNOPSIS" +.HP 12 +\fBudevtrigger\fR [\fB\-\-verbose\fR] [\fB\-\-dry\-run\fR] +.SH "DESCRIPTION" +.PP +Trigger kernel device uevents to replay missing events at system coldplug. +.SH "OPTIONS" +.TP +\fB\-\-verbose\fR +print out the devices found in sysfs. +.TP +\fB\-\-dry\-run\fR +don't actually trigger the event. +.SH "ENVIRONMENT" +.TP +\fBUDEV_LOG\fR +Overrides the syslog priority specified in the config file. +.SH "AUTHOR" +.PP +Written by Kay Sievers + +and Hannes Reinecke +. +.SH "SEE ALSO" +.PP +\fBudev\fR(8) diff --git a/udevtrigger.c b/udevtrigger.c new file mode 100644 index 000000000..bc8453a82 --- /dev/null +++ b/udevtrigger.c @@ -0,0 +1,354 @@ +/* + * udevtrigger.c + * + * Copyright (C) 2004-2006 Kay Sievers + * Copyright (C) 2006 Hannes Reinecke + * + * 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 + * Free Software Foundation version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * 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. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "udev.h" + +static const char *udev_log_str; +static int verbose; +static int dry_run; + +#ifdef USE_LOG +void log_message(int priority, const char *format, ...) +{ + va_list args; + + if (priority > udev_log_priority) + return; + + va_start(args, format); + vsyslog(priority, format, args); + va_end(args); +} +#endif + +/* list of devices that we should run last due to any one of a number of reasons */ +static char *last_list[] = { + "/class/block/md", + "/class/block/dm-", + "/block/md", + "/block/dm-", + NULL +}; + +/* list of devices that we should run first due to any one of a number of reasons */ +static char *first_list[] = { + "/class/mem", + "/class/tty", + NULL +}; + +LIST_HEAD(device_first_list); +LIST_HEAD(device_default_list); +LIST_HEAD(device_last_list); + +static int device_list_insert(const char *path) +{ + struct list_head *device_list = &device_default_list; + int i; + + for (i = 0; first_list[i] != NULL; i++) { + if (strncmp(path, first_list[i], strlen(first_list[i])) == 0) { + device_list = &device_first_list; + break; + } + } + for (i = 0; last_list[i] != NULL; i++) { + if (strncmp(path, last_list[i], strlen(last_list[i])) == 0) { + device_list = &device_last_list; + break; + } + } + + dbg("add '%s'" , path); + /* double entries will be ignored */ + name_list_add(device_list, path, 0); + return 0; +} + +static void trigger_uevent(const char *path) +{ + char filename[PATH_SIZE]; + int fd; + + strlcpy(filename, path, sizeof(filename)); + strlcat(filename, "/uevent", sizeof(filename)); + + if (verbose) + printf("%s\n", path); + + if (dry_run) + return; + + fd = open(filename, O_WRONLY); + if (fd < 0) { + dbg("error on opening %s: %s\n", filename, strerror(errno)); + return; + } + + if (write(fd, "add", 3) < 0) + info("error on triggering %s: %s\n", filename, strerror(errno)); + + close(fd); +} + +static void exec_lists(void) +{ + struct name_entry *loop_device; + struct name_entry *tmp_device; + + /* handle the devices on the "first" list first */ + list_for_each_entry_safe(loop_device, tmp_device, &device_first_list, node) { + trigger_uevent(loop_device->name); + list_del(&loop_device->node); + free(loop_device); + } + + /* handle the devices on the "default" list next */ + list_for_each_entry_safe(loop_device, tmp_device, &device_default_list, node) { + trigger_uevent(loop_device->name); + list_del(&loop_device->node); + free(loop_device); + } + + /* handle devices on the "last" list, if any */ + list_for_each_entry_safe(loop_device, tmp_device, &device_last_list, node) { + trigger_uevent(loop_device->name); + list_del(&loop_device->node); + free(loop_device); + } +} + +static int is_device(const char *path) +{ + char filename[PATH_SIZE]; + struct stat statbuf; + + /* look for the uevent file of the kobject */ + strlcpy(filename, path, sizeof(filename)); + strlcat(filename, "/uevent", sizeof(filename)); + if (stat(filename, &statbuf) < 0) + return 0; + + if (!(statbuf.st_mode & S_IWUSR)) + return 0; + + return 1; +} + +static void udev_scan_bus(void) +{ + char base[PATH_SIZE]; + DIR *dir; + struct dirent *dent; + + strlcpy(base, sysfs_path, sizeof(base)); + strlcat(base, "/bus", sizeof(base)); + + dir = opendir(base); + if (dir != NULL) { + for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { + char dirname[PATH_SIZE]; + DIR *dir2; + struct dirent *dent2; + + if (dent->d_name[0] == '.') + continue; + + strlcpy(dirname, base, sizeof(dirname)); + strlcat(dirname, "/", sizeof(dirname)); + strlcat(dirname, dent->d_name, sizeof(dirname)); + strlcat(dirname, "/devices", sizeof(dirname)); + + /* look for devices */ + dir2 = opendir(dirname); + if (dir2 != NULL) { + for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) { + char dirname2[PATH_SIZE]; + + if (dent2->d_name[0] == '.') + continue; + + strlcpy(dirname2, dirname, sizeof(dirname2)); + strlcat(dirname2, "/", sizeof(dirname2)); + strlcat(dirname2, dent2->d_name, sizeof(dirname2)); + + if (is_device(dirname2)) + device_list_insert(dirname2); + } + closedir(dir2); + } + } + closedir(dir); + } +} + +static void udev_scan_block(void) +{ + char base[PATH_SIZE]; + DIR *dir; + struct dirent *dent; + struct stat statbuf; + + /* skip if "block" is already a "class" */ + strlcpy(base, sysfs_path, sizeof(base)); + strlcat(base, "/class/block", sizeof(base)); + if (stat(base, &statbuf) == 0) + return; + + strlcpy(base, sysfs_path, sizeof(base)); + strlcat(base, "/block", sizeof(base)); + + dir = opendir(base); + if (dir != NULL) { + for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { + char dirname[PATH_SIZE]; + DIR *dir2; + struct dirent *dent2; + + if (dent->d_name[0] == '.') + continue; + + strlcpy(dirname, base, sizeof(dirname)); + strlcat(dirname, "/", sizeof(dirname)); + strlcat(dirname, dent->d_name, sizeof(dirname)); + if (is_device(dirname)) + device_list_insert(dirname); + else + continue; + + /* look for partitions */ + dir2 = opendir(dirname); + if (dir2 != NULL) { + for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) { + char dirname2[PATH_SIZE]; + + if (dent2->d_name[0] == '.') + continue; + + if (!strcmp(dent2->d_name,"device")) + continue; + + strlcpy(dirname2, dirname, sizeof(dirname2)); + strlcat(dirname2, "/", sizeof(dirname2)); + strlcat(dirname2, dent2->d_name, sizeof(dirname2)); + if (is_device(dirname2)) + device_list_insert(dirname2); + } + closedir(dir2); + } + } + closedir(dir); + } +} + +static void udev_scan_class(void) +{ + char base[PATH_SIZE]; + DIR *dir; + struct dirent *dent; + + strlcpy(base, sysfs_path, sizeof(base)); + strlcat(base, "/class", sizeof(base)); + + dir = opendir(base); + if (dir != NULL) { + for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { + char dirname[PATH_SIZE]; + DIR *dir2; + struct dirent *dent2; + + if (dent->d_name[0] == '.') + continue; + + strlcpy(dirname, base, sizeof(dirname)); + strlcat(dirname, "/", sizeof(dirname)); + strlcat(dirname, dent->d_name, sizeof(dirname)); + dir2 = opendir(dirname); + if (dir2 != NULL) { + for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) { + char dirname2[PATH_SIZE]; + + if (dent2->d_name[0] == '.') + continue; + + if (!strcmp(dent2->d_name, "device")) + continue; + + strlcpy(dirname2, dirname, sizeof(dirname2)); + strlcat(dirname2, "/", sizeof(dirname2)); + strlcat(dirname2, dent2->d_name, sizeof(dirname2)); + if (is_device(dirname2)) + device_list_insert(dirname2); + } + closedir(dir2); + } + } + closedir(dir); + } +} + +int main(int argc, char *argv[], char *envp[]) +{ + int i; + + logging_init("udevtrigger"); + udev_config_init(); + dbg("version %s", UDEV_VERSION); + + udev_log_str = getenv("UDEV_LOG"); + + for (i = 1 ; i < argc; i++) { + char *arg = argv[i]; + + if (strcmp(arg, "--verbose") == 0 || strcmp(arg, "-v") == 0) + verbose = 1; + else if (strcmp(arg, "--dry-run") == 0 || strcmp(arg, "-n") == 0) + dry_run = 1; + else { + fprintf(stderr, "Usage: udevtrigger [--verbose] [--dry-run]\n"); + goto exit; + } + } + + sysfs_init(); + + udev_scan_bus(); + udev_scan_class(); + udev_scan_block(); + exec_lists(); + + sysfs_cleanup(); +exit: + logging_close(); + return 0; +} diff --git a/udevtrigger.xml b/udevtrigger.xml new file mode 100644 index 000000000..da83d56d7 --- /dev/null +++ b/udevtrigger.xml @@ -0,0 +1,90 @@ + + + +
+ + xmlto + + Kay + Sievers + kay.sievers@vrfy.org + + + 2006 + Kay Sievers + + + +
+ udevtrigger + + + udevtrigger + March 2006 + udev + + + + udevtrigger + 8 + + + + udevtriggerrequest kernel devices events for coldplug + + + + + udevtrigger + + + + + + DESCRIPTION + Trigger kernel device uevents to replay missing events at system coldplug. + + + OPTIONS + + + + + print out the devices found in sysfs. + + + + + + don't actually trigger the event. + + + + + + ENVIRONMENT + + + + + Overrides the syslog priority specified in the config file. + + + + + + AUTHOR + Written by Kay Sievers kay.sievers@vrfy.org and + Hannes Reinecke hare@suse.de. + + + + SEE ALSO + + udev8 + + + +
+
-- 2.30.2