2005-04-27 07:59:47 +04:00
/*
* udev . c
*
* Userspace devfs
*
2004-01-27 06:23:11 +03:00
* Copyright ( C ) 2003 , 2004 Greg Kroah - Hartman < greg @ kroah . com >
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*
* 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 0213 9 , USA .
*
*/
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# include <stdio.h>
# include <stddef.h>
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# include <stdlib.h>
# include <string.h>
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# include <ctype.h>
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# include <errno.h>
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# include <signal.h>
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# include "libsysfs/sysfs/libsysfs.h"
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# include "udev.h"
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# include "udev_lib.h"
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# include "udev_version.h"
[PATCH] add udev logging to info log
On Thu, Jan 15, 2004 at 05:14:16AM +0100, Kay Sievers wrote:
> On Wed, Jan 14, 2004 at 01:10:43PM -0800, Greg KH wrote:
> > On Wed, Jan 14, 2004 at 02:34:26PM -0600, Clay Haapala wrote:
> > > On Wed, 14 Jan 2004, Chris Friesen spake thusly:
> > > >
> > > > Maybe for ones with a matching rule, you could print something like:
> > > >
> > > >
> > > Is the act of printing/syslogging a rule in an of itself?
> >
> > No, as currently the only way stuff ends up in the syslog is if
> > DEBUG=true is used on the build line.
> >
> > But it's sounding like we might want to change that... :)
>
> How about this in the syslog after connect/disconnect?
>
> Jan 15 05:07:45 pim udev[28007]: configured rule in '/etc/udev/udev.rules' at line 17 applied, 'video*' becomes 'video/webcam%n'
> Jan 15 05:07:45 pim udev[28007]: creating device node '/udev/video/webcam0'
> Jan 15 05:07:47 pim udev[28015]: removing device node '/udev/video/webcam0'
Here is a slightly better version. I've created a logging.h file and
moved the debug macros from udev.h in there.
If you type:
'make' - you will get a binary that prints one or two lines to syslog
if a device node is created or deleted
'make LOG=false' - you get a binary that prints asolutely nothing
'make DEBUG=true' - the same as today, it will print all debug lines
2004-01-16 08:53:20 +03:00
# include "logging.h"
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# include "namedev.h"
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# include "udevdb.h"
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2003-10-22 07:19:09 +04:00
/* global variables */
char * * main_argv ;
char * * main_envp ;
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# ifdef LOG
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unsigned char logname [ LOGNAME_SIZE ] ;
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void log_message ( int level , const char * format , . . . )
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{
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va_list args ;
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if ( ! udev_log )
return ;
va_start ( args , format ) ;
vsyslog ( level , format , args ) ;
va_end ( args ) ;
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}
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# endif
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2004-08-10 11:49:42 +04:00
asmlinkage static void sig_handler ( int signum )
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{
switch ( signum ) {
case SIGINT :
case SIGTERM :
udevdb_exit ( ) ;
exit ( 20 + signum ) ;
default :
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dbg ( " unhandled signal %d " , signum ) ;
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}
}
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static char * subsystem_blacklist [ ] = {
" scsi_host " ,
" scsi_device " ,
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" usb_host " ,
" pci_bus " ,
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" pcmcia_socket " ,
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" "
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} ;
[PATCH] Fix naming ethernet devices in udevstart
On Tue, Sep 07, 2004 at 12:46:43PM +0200, Kay Sievers wrote:
> On Mon, 2004-09-06 at 20:18 -0700, Tom Rini wrote:
> > I noticed somewhat recently that my enet devices weren't being renamed
> > on boot anymore. I don't quite know when this got broken (or rather, if
> > it was supposed to be working. I swear it worked for me once..), but
> > the following seems to do it.
>
> I think it never worked in the udevstart case. It worked only with the
> hotplug-event-udev, I expect.
>
> > In udev_scan_class(), look for not just
> > %s/%s/dev (which everything with a dev node has), but %s/%s/dev* (both
> > of my enet devices, sis900 & 3c59x only have device) and if that
> > exists, pass this along to udev.
>
> Yeah, network devices don't have a devnode and therefore no "dev", but
> they are all in /sys/class/net/. We may just test if we are there
> instead of the "device" match.
How about something like this. It adds all the net devices without
looking at the attributes and keeps the remaining logic like it is.
It also removes certain levels of indirection and much simplifies the
udevstart process. We surely don't need to open and close the udevdb
for every node while iterating over the list. (We are about 5% faster on
my box)
It's not well tested, so it would be nice if someone can have a look
at it, before a broken udevstart renders any system unbootable.
2004-09-11 08:09:25 +04:00
int main ( int argc , char * argv [ ] , char * envp [ ] )
2003-12-31 09:31:37 +03:00
{
[PATCH] Fix naming ethernet devices in udevstart
On Tue, Sep 07, 2004 at 12:46:43PM +0200, Kay Sievers wrote:
> On Mon, 2004-09-06 at 20:18 -0700, Tom Rini wrote:
> > I noticed somewhat recently that my enet devices weren't being renamed
> > on boot anymore. I don't quite know when this got broken (or rather, if
> > it was supposed to be working. I swear it worked for me once..), but
> > the following seems to do it.
>
> I think it never worked in the udevstart case. It worked only with the
> hotplug-event-udev, I expect.
>
> > In udev_scan_class(), look for not just
> > %s/%s/dev (which everything with a dev node has), but %s/%s/dev* (both
> > of my enet devices, sis900 & 3c59x only have device) and if that
> > exists, pass this along to udev.
>
> Yeah, network devices don't have a devnode and therefore no "dev", but
> they are all in /sys/class/net/. We may just test if we are there
> instead of the "device" match.
How about something like this. It adds all the net devices without
looking at the attributes and keeps the remaining logic like it is.
It also removes certain levels of indirection and much simplifies the
udevstart process. We surely don't need to open and close the udevdb
for every node while iterating over the list. (We are about 5% faster on
my box)
It's not well tested, so it would be nice if someone can have a look
at it, before a broken udevstart renders any system unbootable.
2004-09-11 08:09:25 +04:00
main_argv = argv ;
main_envp = envp ;
2004-02-12 09:29:15 +03:00
struct sigaction act ;
[PATCH] Fix naming ethernet devices in udevstart
On Tue, Sep 07, 2004 at 12:46:43PM +0200, Kay Sievers wrote:
> On Mon, 2004-09-06 at 20:18 -0700, Tom Rini wrote:
> > I noticed somewhat recently that my enet devices weren't being renamed
> > on boot anymore. I don't quite know when this got broken (or rather, if
> > it was supposed to be working. I swear it worked for me once..), but
> > the following seems to do it.
>
> I think it never worked in the udevstart case. It worked only with the
> hotplug-event-udev, I expect.
>
> > In udev_scan_class(), look for not just
> > %s/%s/dev (which everything with a dev node has), but %s/%s/dev* (both
> > of my enet devices, sis900 & 3c59x only have device) and if that
> > exists, pass this along to udev.
>
> Yeah, network devices don't have a devnode and therefore no "dev", but
> they are all in /sys/class/net/. We may just test if we are there
> instead of the "device" match.
How about something like this. It adds all the net devices without
looking at the attributes and keeps the remaining logic like it is.
It also removes certain levels of indirection and much simplifies the
udevstart process. We surely don't need to open and close the udevdb
for every node while iterating over the list. (We are about 5% faster on
my box)
It's not well tested, so it would be nice if someone can have a look
at it, before a broken udevstart renders any system unbootable.
2004-09-11 08:09:25 +04:00
char * action ;
char * devpath = " " ;
char * subsystem = " " ;
int i ;
int retval = - EINVAL ;
enum {
ADD ,
REMOVE ,
UDEVSTART ,
} act_type ;
2003-12-31 09:31:37 +03:00
[PATCH] Fix naming ethernet devices in udevstart
On Tue, Sep 07, 2004 at 12:46:43PM +0200, Kay Sievers wrote:
> On Mon, 2004-09-06 at 20:18 -0700, Tom Rini wrote:
> > I noticed somewhat recently that my enet devices weren't being renamed
> > on boot anymore. I don't quite know when this got broken (or rather, if
> > it was supposed to be working. I swear it worked for me once..), but
> > the following seems to do it.
>
> I think it never worked in the udevstart case. It worked only with the
> hotplug-event-udev, I expect.
>
> > In udev_scan_class(), look for not just
> > %s/%s/dev (which everything with a dev node has), but %s/%s/dev* (both
> > of my enet devices, sis900 & 3c59x only have device) and if that
> > exists, pass this along to udev.
>
> Yeah, network devices don't have a devnode and therefore no "dev", but
> they are all in /sys/class/net/. We may just test if we are there
> instead of the "device" match.
How about something like this. It adds all the net devices without
looking at the attributes and keeps the remaining logic like it is.
It also removes certain levels of indirection and much simplifies the
udevstart process. We surely don't need to open and close the udevdb
for every node while iterating over the list. (We are about 5% faster on
my box)
It's not well tested, so it would be nice if someone can have a look
at it, before a broken udevstart renders any system unbootable.
2004-09-11 08:09:25 +04:00
dbg ( " version %s " , UDEV_VERSION ) ;
2003-07-17 12:24:51 +04:00
[PATCH] Fix naming ethernet devices in udevstart
On Tue, Sep 07, 2004 at 12:46:43PM +0200, Kay Sievers wrote:
> On Mon, 2004-09-06 at 20:18 -0700, Tom Rini wrote:
> > I noticed somewhat recently that my enet devices weren't being renamed
> > on boot anymore. I don't quite know when this got broken (or rather, if
> > it was supposed to be working. I swear it worked for me once..), but
> > the following seems to do it.
>
> I think it never worked in the udevstart case. It worked only with the
> hotplug-event-udev, I expect.
>
> > In udev_scan_class(), look for not just
> > %s/%s/dev (which everything with a dev node has), but %s/%s/dev* (both
> > of my enet devices, sis900 & 3c59x only have device) and if that
> > exists, pass this along to udev.
>
> Yeah, network devices don't have a devnode and therefore no "dev", but
> they are all in /sys/class/net/. We may just test if we are there
> instead of the "device" match.
How about something like this. It adds all the net devices without
looking at the attributes and keeps the remaining logic like it is.
It also removes certain levels of indirection and much simplifies the
udevstart process. We surely don't need to open and close the udevdb
for every node while iterating over the list. (We are about 5% faster on
my box)
It's not well tested, so it would be nice if someone can have a look
at it, before a broken udevstart renders any system unbootable.
2004-09-11 08:09:25 +04:00
/* initialize our configuration */
udev_init_config ( ) ;
2003-07-17 07:18:06 +04:00
[PATCH] Fix naming ethernet devices in udevstart
On Tue, Sep 07, 2004 at 12:46:43PM +0200, Kay Sievers wrote:
> On Mon, 2004-09-06 at 20:18 -0700, Tom Rini wrote:
> > I noticed somewhat recently that my enet devices weren't being renamed
> > on boot anymore. I don't quite know when this got broken (or rather, if
> > it was supposed to be working. I swear it worked for me once..), but
> > the following seems to do it.
>
> I think it never worked in the udevstart case. It worked only with the
> hotplug-event-udev, I expect.
>
> > In udev_scan_class(), look for not just
> > %s/%s/dev (which everything with a dev node has), but %s/%s/dev* (both
> > of my enet devices, sis900 & 3c59x only have device) and if that
> > exists, pass this along to udev.
>
> Yeah, network devices don't have a devnode and therefore no "dev", but
> they are all in /sys/class/net/. We may just test if we are there
> instead of the "device" match.
How about something like this. It adds all the net devices without
looking at the attributes and keeps the remaining logic like it is.
It also removes certain levels of indirection and much simplifies the
udevstart process. We surely don't need to open and close the udevdb
for every node while iterating over the list. (We are about 5% faster on
my box)
It's not well tested, so it would be nice if someone can have a look
at it, before a broken udevstart renders any system unbootable.
2004-09-11 08:09:25 +04:00
if ( strstr ( argv [ 0 ] , " udevstart " ) ) {
act_type = UDEVSTART ;
} else {
action = get_action ( ) ;
if ( ! action ) {
dbg ( " no action? " ) ;
goto exit ;
}
if ( strcmp ( action , " add " ) = = 0 ) {
act_type = ADD ;
} else if ( strcmp ( action , " remove " ) = = 0 ) {
act_type = REMOVE ;
} else {
dbg ( " unknown action '%s' " , action ) ;
2004-01-04 19:08:26 +03:00
goto exit ;
}
2005-04-27 07:59:47 +04:00
[PATCH] Fix naming ethernet devices in udevstart
On Tue, Sep 07, 2004 at 12:46:43PM +0200, Kay Sievers wrote:
> On Mon, 2004-09-06 at 20:18 -0700, Tom Rini wrote:
> > I noticed somewhat recently that my enet devices weren't being renamed
> > on boot anymore. I don't quite know when this got broken (or rather, if
> > it was supposed to be working. I swear it worked for me once..), but
> > the following seems to do it.
>
> I think it never worked in the udevstart case. It worked only with the
> hotplug-event-udev, I expect.
>
> > In udev_scan_class(), look for not just
> > %s/%s/dev (which everything with a dev node has), but %s/%s/dev* (both
> > of my enet devices, sis900 & 3c59x only have device) and if that
> > exists, pass this along to udev.
>
> Yeah, network devices don't have a devnode and therefore no "dev", but
> they are all in /sys/class/net/. We may just test if we are there
> instead of the "device" match.
How about something like this. It adds all the net devices without
looking at the attributes and keeps the remaining logic like it is.
It also removes certain levels of indirection and much simplifies the
udevstart process. We surely don't need to open and close the udevdb
for every node while iterating over the list. (We are about 5% faster on
my box)
It's not well tested, so it would be nice if someone can have a look
at it, before a broken udevstart renders any system unbootable.
2004-09-11 08:09:25 +04:00
devpath = get_devpath ( ) ;
if ( ! devpath ) {
dbg ( " no devpath? " ) ;
goto exit ;
}
dbg ( " looking at '%s' " , devpath ) ;
/* we only care about class devices and block stuff */
2004-09-14 17:50:33 +04:00
if ( ! strstr ( devpath , " class " ) & & ! strstr ( devpath , " block " ) ) {
[PATCH] Fix naming ethernet devices in udevstart
On Tue, Sep 07, 2004 at 12:46:43PM +0200, Kay Sievers wrote:
> On Mon, 2004-09-06 at 20:18 -0700, Tom Rini wrote:
> > I noticed somewhat recently that my enet devices weren't being renamed
> > on boot anymore. I don't quite know when this got broken (or rather, if
> > it was supposed to be working. I swear it worked for me once..), but
> > the following seems to do it.
>
> I think it never worked in the udevstart case. It worked only with the
> hotplug-event-udev, I expect.
>
> > In udev_scan_class(), look for not just
> > %s/%s/dev (which everything with a dev node has), but %s/%s/dev* (both
> > of my enet devices, sis900 & 3c59x only have device) and if that
> > exists, pass this along to udev.
>
> Yeah, network devices don't have a devnode and therefore no "dev", but
> they are all in /sys/class/net/. We may just test if we are there
> instead of the "device" match.
How about something like this. It adds all the net devices without
looking at the attributes and keeps the remaining logic like it is.
It also removes certain levels of indirection and much simplifies the
udevstart process. We surely don't need to open and close the udevdb
for every node while iterating over the list. (We are about 5% faster on
my box)
It's not well tested, so it would be nice if someone can have a look
at it, before a broken udevstart renders any system unbootable.
2004-09-11 08:09:25 +04:00
dbg ( " not a block or class device " ) ;
goto exit ;
}
subsystem = get_subsystem ( main_argv [ 1 ] ) ;
if ( ! subsystem ) {
dbg ( " no subsystem? " ) ;
goto exit ;
}
/* skip blacklisted subsystems */
i = 0 ;
while ( subsystem_blacklist [ i ] [ 0 ] ! = ' \0 ' ) {
if ( strcmp ( subsystem , subsystem_blacklist [ i ] ) = = 0 ) {
dbg ( " don't care about '%s' devices " , subsystem ) ;
goto exit ;
}
i + + ;
}
2003-10-15 10:20:53 +04:00
}
2004-06-07 13:56:47 +04:00
/* set signal handlers */
2004-02-12 09:29:15 +03:00
act . sa_handler = sig_handler ;
sigemptyset ( & act . sa_mask ) ;
act . sa_flags = SA_RESTART ;
sigaction ( SIGINT , & act , NULL ) ;
sigaction ( SIGTERM , & act , NULL ) ;
2003-12-30 12:29:16 +03:00
[PATCH] Fix naming ethernet devices in udevstart
On Tue, Sep 07, 2004 at 12:46:43PM +0200, Kay Sievers wrote:
> On Mon, 2004-09-06 at 20:18 -0700, Tom Rini wrote:
> > I noticed somewhat recently that my enet devices weren't being renamed
> > on boot anymore. I don't quite know when this got broken (or rather, if
> > it was supposed to be working. I swear it worked for me once..), but
> > the following seems to do it.
>
> I think it never worked in the udevstart case. It worked only with the
> hotplug-event-udev, I expect.
>
> > In udev_scan_class(), look for not just
> > %s/%s/dev (which everything with a dev node has), but %s/%s/dev* (both
> > of my enet devices, sis900 & 3c59x only have device) and if that
> > exists, pass this along to udev.
>
> Yeah, network devices don't have a devnode and therefore no "dev", but
> they are all in /sys/class/net/. We may just test if we are there
> instead of the "device" match.
How about something like this. It adds all the net devices without
looking at the attributes and keeps the remaining logic like it is.
It also removes certain levels of indirection and much simplifies the
udevstart process. We surely don't need to open and close the udevdb
for every node while iterating over the list. (We are about 5% faster on
my box)
It's not well tested, so it would be nice if someone can have a look
at it, before a broken udevstart renders any system unbootable.
2004-09-11 08:09:25 +04:00
/* initialize udev database */
if ( udevdb_init ( UDEVDB_DEFAULT ) ! = 0 ) {
dbg ( " unable to initialize database " ) ;
goto exit ;
[PATCH] hmm, handle net devices with udev?
Hmm, Arndt Bergmann sent a patch like this one a few weeks ago and
I want to bring the question back, if we want to handle net device
naming with udev.
With this patch it is actually possible to specify something like this
in udev.rules:
KERNEL="dummy*", SYSFS{address}="00:00:00:00:00:00", SYSFS{features}="0x0", NAME="blind%n"
KERNEL="eth*", SYSFS{address}="00:0d:60:77:30:91", NAME="private"
and you will get:
[root@pim udev.kay]# cat /proc/net/dev
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
lo: 1500 30 0 0 0 0 0 0 1500 30 0 0 0 0 0 0
private: 278393 1114 0 0 0 0 0 0 153204 1468 0 0 0 0 0 0
sit0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
blind0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
The udevinfo program is also working:
[root@pim udev.kay]# ./udevinfo -a -p /sys/class/net/private
looking at class device '/sys/class/net/private':
SYSFS{addr_len}="6"
SYSFS{address}="00:0d:60:77:30:91"
SYSFS{broadcast}="ff:ff:ff:ff:ff:ff"
SYSFS{features}="0x3a9"
SYSFS{flags}="0x1003"
SYSFS{ifindex}="2"
SYSFS{iflink}="2"
SYSFS{mtu}="1500"
SYSFS{tx_queue_len}="1000"
SYSFS{type}="1"
follow the class device's "device"
looking at the device chain at '/sys/devices/pci0000:00/0000:00:1e.0/0000:02:01.0':
BUS="pci"
ID="0000:02:01.0"
SYSFS{class}="0x020000"
SYSFS{detach_state}="0"
SYSFS{device}="0x101e"
SYSFS{irq}="11"
SYSFS{subsystem_device}="0x0549"
SYSFS{subsystem_vendor}="0x1014"
SYSFS{vendor}="0x8086"
The matching device will be renamed to the given name. The device name
will not be put into the udev database, cause the kernel renames the
device and the sysfs name disappears.
I like it, cause it plugs in nicely. We have all the naming features
and sysfs queries and walks inside of udev. The sysfs timing races
are already solved and the management tools are working for net devices
too. nameif can only match the MAC address now. udev can match any sysfs
value of the device tree the net device is connected to.
But right, net devices do not have device nodes :)
2004-03-25 10:19:39 +03:00
}
[PATCH] Fix naming ethernet devices in udevstart
On Tue, Sep 07, 2004 at 12:46:43PM +0200, Kay Sievers wrote:
> On Mon, 2004-09-06 at 20:18 -0700, Tom Rini wrote:
> > I noticed somewhat recently that my enet devices weren't being renamed
> > on boot anymore. I don't quite know when this got broken (or rather, if
> > it was supposed to be working. I swear it worked for me once..), but
> > the following seems to do it.
>
> I think it never worked in the udevstart case. It worked only with the
> hotplug-event-udev, I expect.
>
> > In udev_scan_class(), look for not just
> > %s/%s/dev (which everything with a dev node has), but %s/%s/dev* (both
> > of my enet devices, sis900 & 3c59x only have device) and if that
> > exists, pass this along to udev.
>
> Yeah, network devices don't have a devnode and therefore no "dev", but
> they are all in /sys/class/net/. We may just test if we are there
> instead of the "device" match.
How about something like this. It adds all the net devices without
looking at the attributes and keeps the remaining logic like it is.
It also removes certain levels of indirection and much simplifies the
udevstart process. We surely don't need to open and close the udevdb
for every node while iterating over the list. (We are about 5% faster on
my box)
It's not well tested, so it would be nice if someone can have a look
at it, before a broken udevstart renders any system unbootable.
2004-09-11 08:09:25 +04:00
switch ( act_type ) {
case UDEVSTART :
dbg ( " udevstart " ) ;
namedev_init ( ) ;
udev_sleep = 0 ;
retval = udev_start ( ) ;
break ;
case ADD :
dbg ( " udev add " ) ;
namedev_init ( ) ;
retval = udev_add_device ( devpath , subsystem , NOFAKE ) ;
break ;
case REMOVE :
dbg ( " udev remove " ) ;
[PATCH] hmm, handle net devices with udev?
Hmm, Arndt Bergmann sent a patch like this one a few weeks ago and
I want to bring the question back, if we want to handle net device
naming with udev.
With this patch it is actually possible to specify something like this
in udev.rules:
KERNEL="dummy*", SYSFS{address}="00:00:00:00:00:00", SYSFS{features}="0x0", NAME="blind%n"
KERNEL="eth*", SYSFS{address}="00:0d:60:77:30:91", NAME="private"
and you will get:
[root@pim udev.kay]# cat /proc/net/dev
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
lo: 1500 30 0 0 0 0 0 0 1500 30 0 0 0 0 0 0
private: 278393 1114 0 0 0 0 0 0 153204 1468 0 0 0 0 0 0
sit0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
blind0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
The udevinfo program is also working:
[root@pim udev.kay]# ./udevinfo -a -p /sys/class/net/private
looking at class device '/sys/class/net/private':
SYSFS{addr_len}="6"
SYSFS{address}="00:0d:60:77:30:91"
SYSFS{broadcast}="ff:ff:ff:ff:ff:ff"
SYSFS{features}="0x3a9"
SYSFS{flags}="0x1003"
SYSFS{ifindex}="2"
SYSFS{iflink}="2"
SYSFS{mtu}="1500"
SYSFS{tx_queue_len}="1000"
SYSFS{type}="1"
follow the class device's "device"
looking at the device chain at '/sys/devices/pci0000:00/0000:00:1e.0/0000:02:01.0':
BUS="pci"
ID="0000:02:01.0"
SYSFS{class}="0x020000"
SYSFS{detach_state}="0"
SYSFS{device}="0x101e"
SYSFS{irq}="11"
SYSFS{subsystem_device}="0x0549"
SYSFS{subsystem_vendor}="0x1014"
SYSFS{vendor}="0x8086"
The matching device will be renamed to the given name. The device name
will not be put into the udev database, cause the kernel renames the
device and the sysfs name disappears.
I like it, cause it plugs in nicely. We have all the naming features
and sysfs queries and walks inside of udev. The sysfs timing races
are already solved and the management tools are working for net devices
too. nameif can only match the MAC address now. udev can match any sysfs
value of the device tree the net device is connected to.
But right, net devices do not have device nodes :)
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retval = udev_remove_device ( devpath , subsystem ) ;
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}
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2003-10-15 10:20:53 +04:00
udevdb_exit ( ) ;
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exit :
[PATCH] hmm, handle net devices with udev?
Hmm, Arndt Bergmann sent a patch like this one a few weeks ago and
I want to bring the question back, if we want to handle net device
naming with udev.
With this patch it is actually possible to specify something like this
in udev.rules:
KERNEL="dummy*", SYSFS{address}="00:00:00:00:00:00", SYSFS{features}="0x0", NAME="blind%n"
KERNEL="eth*", SYSFS{address}="00:0d:60:77:30:91", NAME="private"
and you will get:
[root@pim udev.kay]# cat /proc/net/dev
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
lo: 1500 30 0 0 0 0 0 0 1500 30 0 0 0 0 0 0
private: 278393 1114 0 0 0 0 0 0 153204 1468 0 0 0 0 0 0
sit0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
blind0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
The udevinfo program is also working:
[root@pim udev.kay]# ./udevinfo -a -p /sys/class/net/private
looking at class device '/sys/class/net/private':
SYSFS{addr_len}="6"
SYSFS{address}="00:0d:60:77:30:91"
SYSFS{broadcast}="ff:ff:ff:ff:ff:ff"
SYSFS{features}="0x3a9"
SYSFS{flags}="0x1003"
SYSFS{ifindex}="2"
SYSFS{iflink}="2"
SYSFS{mtu}="1500"
SYSFS{tx_queue_len}="1000"
SYSFS{type}="1"
follow the class device's "device"
looking at the device chain at '/sys/devices/pci0000:00/0000:00:1e.0/0000:02:01.0':
BUS="pci"
ID="0000:02:01.0"
SYSFS{class}="0x020000"
SYSFS{detach_state}="0"
SYSFS{device}="0x101e"
SYSFS{irq}="11"
SYSFS{subsystem_device}="0x0549"
SYSFS{subsystem_vendor}="0x1014"
SYSFS{vendor}="0x8086"
The matching device will be renamed to the given name. The device name
will not be put into the udev database, cause the kernel renames the
device and the sysfs name disappears.
I like it, cause it plugs in nicely. We have all the naming features
and sysfs queries and walks inside of udev. The sysfs timing races
are already solved and the management tools are working for net devices
too. nameif can only match the MAC address now. udev can match any sysfs
value of the device tree the net device is connected to.
But right, net devices do not have device nodes :)
2004-03-25 10:19:39 +03:00
return retval ;
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}