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add udevmonitor, to debug netlink+udev events at the same time

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This rule:
  RUN+="socket:/org/kernel/udev/monitor"

send the event to the running monitor. Running udevstart give a nice
monitor output. Also the delay between the kernel uevent and the udev
udev event can be investigated:

  pim:/home/kay/src/udev-kay # ./udevmonitor
  UEVENT[1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1
  UEVENT[1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1:1.0
  UEVENT[1122920113] add@/class/scsi_host/host12
  UEVENT[1122920113] add@/class/usb_device/usbdev2.99
  UEVENT[1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1:1.0/host12/target12:0:0/12:0:0:0
  UDEV  [1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1
  UEVENT[1122920113] add@/block/sda
  UEVENT[1122920113] add@/class/scsi_generic/sg0
  UEVENT[1122920113] add@/class/scsi_device/12:0:0:0
  UDEV  [1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1:1.0
  UDEV  [1122920113] add@/class/scsi_host/host12
  UDEV  [1122920113] add@/class/usb_device/usbdev2.99
  UDEV  [1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1:1.0/host12/target12:0:0/12:0:0:0
  UDEV  [1122920113] add@/block/sda
  UDEV  [1122920113] add@/class/scsi_generic/sg0
  UDEV  [1122920113] add@/class/scsi_device/12:0:0:0
  UEVENT[1122920115] add@/block/sda/sda1
  UDEV  [1122920115] add@/block/sda/sda1

  pim:/home/kay/src/udev-kay # ./udevmonitor --env
  UDEV  [1122920185] add@/block/sda/sda1
  ACTION=add
  DEVPATH=/block/sda/sda1
  SUBSYSTEM=block
  SEQNUM=2159
  MINOR=1
  MAJOR=8
  PHYSDEVPATH=/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1:1.0/host13/target13:0:0/13:0:0:0
  PHYSDEVBUS=scsi
  PHYSDEVDRIVER=sd
  UDEVD_EVENT=1
  UDEV_LOG=3
  ID_VENDOR=IBM
  ID_MODEL=Memory_Key
  ID_REVISION=3.04
  ID_SERIAL=IBM_Memory_Key_0218B301030027E8
  ID_TYPE=disk
  ID_BUS=usb
  ID_PATH=usb-0218B301030027E8:0:0:0
  ID_FS_USAGE=filesystem
  ID_FS_TYPE=vfat
  ID_FS_VERSION=FAT16
  ID_FS_UUID=42D8-9E02
  ID_FS_LABEL_SAFE=s_p_c
  DEVNAME=/dev/sda1

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
This commit is contained in:
Kay Sievers 2005-08-01 20:22:46 +02:00
parent d455b0085d
commit 1bc3362678
3 changed files with 196 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Makefile
View File

@ -49,6 +49,7 @@ COMPILE = udevrulescompile
INITSENDER = udevinitsend
RECORDER = udeveventrecorder
CONTROL = udevcontrol
MONITOR = udevmonitor
INFO = udevinfo
TESTER = udevtest
STARTER = udevstart
@ -204,7 +205,7 @@ endif
# config files automatically generated
GEN_CONFIGS = $(LOCAL_CFG_DIR)/udev.conf
all: $(ROOT) $(SENDER) $(COMPILE) $(INITSENDER) $(RECORDER) $(CONTROL) \
all: $(ROOT) $(SENDER) $(COMPILE) $(INITSENDER) $(RECORDER) $(CONTROL) $(MONITOR)\
$(DAEMON) $(COMPILE) $(INFO) $(TESTER) $(STARTER) $(GEN_CONFIGS) $(KLCC)
@extras="$(EXTRAS)" ; for target in $$extras ; do \
echo $$target ; \
@ -275,6 +276,7 @@ $(COMPILE).o: $(HEADERS) $(GEN_HEADERS) $(HOST_PROGS) $(KLCC)
$(INITSENDER).o: $(GEN_HEADERS) $(HOST_PROGS) $(KLCC)
$(RECORDER).o: $(GEN_HEADERS) $(HOST_PROGS) $(KLCC)
$(CONTROL).o: $(HEADERS) $( $(HEADERS)GEN_HEADERS) $(HOST_PROGS) $(KLCC)
$(MONITOR).o: $(HEADERS) $( $(HEADERS)GEN_HEADERS) $(HOST_PROGS) $(KLCC)
$(STARTER).o: $(HEADERS) $(GEN_HEADERS) $(HOST_PROGS) $(KLCC)
$(ROOT): $(KLCC) $(ROOT).o $(OBJS) $(HEADERS) $(GEN_MANPAGES)
@ -313,6 +315,10 @@ $(CONTROL): $(KLCC) $(CONTROL).o $(OBJS) udevd.h
$(QUIET) $(LD) $(LDFLAGS) -o $@ $(CONTROL).o $(OBJS) $(LIB_OBJS)
$(QUIET) $(STRIPCMD) $@
$(MONITOR): $(KLCC) $(MONITOR).o $(OBJS) udevd.h
$(QUIET) $(LD) $(LDFLAGS) -o $@ $(MONITOR).o $(OBJS) $(LIB_OBJS)
$(QUIET) $(STRIPCMD) $@
$(STARTER): $(KLCC) $(STARTER).o $(OBJS)
$(QUIET) $(LD) $(LDFLAGS) -o $@ $(STARTER).o $(OBJS) $(LIB_OBJS)
$(QUIET) $(STRIPCMD) $@
@ -324,7 +330,7 @@ clean:
-find . \( -not -type d \) -and \( -name '*~' -o -name '*.[oas]' \) -type f -print \
| xargs rm -f
-rm -f core $(ROOT) $(GEN_HEADERS) $(GEN_CONFIGS) $(GEN_MANPAGES) $(INFO) $(DAEMON) \
$(SENDER) $(COMPILE) $(INITSENDER) $(RECORDER) $(CONTROL) $(TESTER) $(STARTER)
$(SENDER) $(COMPILE) $(INITSENDER) $(RECORDER) $(CONTROL) $(MONITOR) $(TESTER) $(STARTER)
-rm -f ccdv
$(MAKE) -C klibc SUBDIRS=klibc clean
@extras="$(EXTRAS)" ; for target in $$extras ; do \
@ -374,6 +380,7 @@ install: install-config install-man all
$(INSTALL_PROGRAM) -D $(DAEMON) $(DESTDIR)$(sbindir)/$(DAEMON)
$(INSTALL_PROGRAM) -D $(SENDER) $(DESTDIR)$(sbindir)/$(SENDER)
$(INSTALL_PROGRAM) -D $(CONTROL) $(DESTDIR)$(sbindir)/$(CONTROL)
$(INSTALL_PROGRAM) -D $(MONITOR) $(DESTDIR)$(sbindir)/$(MONITOR)
$(INSTALL_PROGRAM) -D $(INFO) $(DESTDIR)$(usrbindir)/$(INFO)
$(INSTALL_PROGRAM) -D $(TESTER) $(DESTDIR)$(usrbindir)/$(TESTER)
$(INSTALL_PROGRAM) -D $(STARTER) $(DESTDIR)$(sbindir)/$(STARTER)
@ -399,6 +406,7 @@ uninstall: uninstall-man
- rm $(sbindir)/$(INITSENDER)
- rm $(sbindir)/$(RECORDER)
- rm $(sbindir)/$(CONTROL)
- rm $(sbindir)/$(MONITOR)
- rm $(sbindir)/$(STARTER)
- rm $(usrbindir)/$(INFO)
- rm $(usrbindir)/$(TESTER)

2
udevd.h
View File

@ -22,7 +22,7 @@
#include "list.h"
#define UDEV_MAGIC "udevd_" UDEV_VERSION
#define UDEVD_SOCK_PATH "udevd"
#define UDEVD_SOCK_PATH "/org/kernel/udev/udevd"
#define UDEVSEND_WAIT_MAX_SECONDS 3
#define UDEVSEND_WAIT_LOOP_PER_SECOND 10

185
udevmonitor.c Normal file
View File

@ -0,0 +1,185 @@
/*
* udevmonitor.c
*
* Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
*
* 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 <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/select.h>
#include <linux/netlink.h>
#include <asm/types.h>
#include "udev.h"
#include "udevd.h"
static int uevent_netlink_sock;
static int udev_monitor_sock;
static int init_udev_monitor_socket(void)
{
struct sockaddr_un saddr;
socklen_t addrlen;
const int feature_on = 1;
int retval;
memset(&saddr, 0x00, sizeof(saddr));
saddr.sun_family = AF_LOCAL;
/* use abstract namespace for socket path */
strcpy(&saddr.sun_path[1], "/org/kernel/udev/monitor");
addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
udev_monitor_sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (udev_monitor_sock == -1) {
fprintf(stderr, "error getting socket, %s\n", strerror(errno));
return -1;
}
/* the bind takes care of ensuring only one copy running */
retval = bind(udev_monitor_sock, (struct sockaddr *) &saddr, addrlen);
if (retval < 0) {
fprintf(stderr, "bind failed, %s\n", strerror(errno));
close(udev_monitor_sock);
return -1;
}
/* enable receiving of the sender credentials */
setsockopt(udev_monitor_sock, SOL_SOCKET, SO_PASSCRED, &feature_on, sizeof(feature_on));
return 0;
}
static int init_uevent_netlink_sock(void)
{
struct sockaddr_nl snl;
int retval;
memset(&snl, 0x00, sizeof(struct sockaddr_nl));
snl.nl_family = AF_NETLINK;
snl.nl_pid = getpid();
snl.nl_groups = 0xffffffff;
uevent_netlink_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
if (uevent_netlink_sock == -1) {
fprintf(stderr, "error getting socket, %s\n", strerror(errno));
return -1;
}
retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl,
sizeof(struct sockaddr_nl));
if (retval < 0) {
fprintf(stderr, "bind failed, %s\n", strerror(errno));
close(uevent_netlink_sock);
uevent_netlink_sock = -1;
return -1;
}
return 0;
}
int main(int argc, char *argv[])
{
int env = 0;
int maxsockplus;
fd_set readfds;
int retval;
if (getuid() != 0) {
printf("need to be root, exit\n");
exit(1);
}
if (argc == 2 && strstr(argv[1], "--env"))
env = 1;
init_uevent_netlink_sock();
init_udev_monitor_socket();
FD_ZERO(&readfds);
FD_SET(uevent_netlink_sock, &readfds);
FD_SET(udev_monitor_sock, &readfds);
maxsockplus = udev_monitor_sock+1;
while (1) {
static char buf[UEVENT_BUFFER_SIZE*2];
ssize_t buflen;
fd_set workreadfds;
buflen = 0;
workreadfds = readfds;
retval = select(maxsockplus, &workreadfds, NULL, NULL, NULL);
if (retval < 0) {
if (errno != EINTR)
fprintf(stderr, "error receiving uevent message\n");
continue;
}
if (FD_ISSET(uevent_netlink_sock, &workreadfds)) {
buflen = recv(uevent_netlink_sock, &buf, sizeof(buf), 0);
if (buflen <= 0) {
fprintf(stderr, "error receiving uevent message\n");
continue;
}
printf("UEVENT[%i] %s\n", time(NULL), buf);
}
if (FD_ISSET(udev_monitor_sock, &workreadfds)) {
buflen = recv(udev_monitor_sock, &buf, sizeof(buf), 0);
if (buflen <= 0) {
fprintf(stderr, "error receiving udev message\n");
continue;
}
printf("UDEV [%i] %s\n", time(NULL), buf);
}
if (buflen == 0)
continue;
/* print environment */
if (env) {
size_t bufpos;
/* start of payload */
bufpos = strlen(buf) + 1;
while (bufpos < (size_t)buflen) {
int keylen;
char *key;
key = &buf[bufpos];
keylen = strlen(key);
if (keylen == 0)
break;
printf("%s\n", key);
bufpos += keylen + 1;
}
printf("\n");
}
}
close(uevent_netlink_sock);
close(udev_monitor_sock);
exit(1);
}