2003-07-21 07:48:48 +04:00
/*
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* udev - node . c - device node handling
2003-07-21 07:48:48 +04:00
*
* Copyright ( C ) 2003 Greg Kroah - Hartman < greg @ kroah . com >
2005-07-22 20:35:58 +04:00
* Copyright ( C ) 2004 Kay Sievers < kay . sievers @ vrfy . org >
2003-07-21 07:48:48 +04:00
*
* 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 .
*
*/
# include <stdlib.h>
# include <string.h>
# include <stdio.h>
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# include <stddef.h>
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# include <fcntl.h>
# include <unistd.h>
# include <errno.h>
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# include <grp.h>
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# include <sys/stat.h>
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# include <sys/types.h>
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# include "udev.h"
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# include "udev_rules.h"
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# include "udev_selinux.h"
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2006-04-06 00:29:33 +04:00
int udev_node_mknod ( struct udevice * udev , const char * file , dev_t devt , mode_t mode , uid_t uid , gid_t gid )
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{
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struct stat stats ;
int retval = 0 ;
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if ( major ( devt ) ! = 0 & & strcmp ( udev - > dev - > subsystem , " block " ) = = 0 )
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mode | = S_IFBLK ;
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else
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mode | = S_IFCHR ;
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if ( stat ( file , & stats ) ! = 0 )
goto create ;
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/* preserve node with already correct numbers, to prevent changing the inode number */
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if ( ( stats . st_mode & S_IFMT ) = = ( mode & S_IFMT ) & & ( stats . st_rdev = = devt ) ) {
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info ( " preserve file '%s', because it has correct dev_t " , file ) ;
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selinux_setfilecon ( file , udev - > dev - > kernel_name , stats . st_mode ) ;
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goto perms ;
}
if ( unlink ( file ) ! = 0 )
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err ( " unlink(%s) failed: %s " , file , strerror ( errno ) ) ;
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else
dbg ( " already present file '%s' unlinked " , file ) ;
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2004-04-03 10:16:38 +04:00
create :
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selinux_setfscreatecon ( file , udev - > dev - > kernel_name , mode ) ;
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retval = mknod ( file , mode , devt ) ;
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selinux_resetfscreatecon ( ) ;
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if ( retval ! = 0 ) {
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err ( " mknod(%s, %#o, %u, %u) failed: %s " ,
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file , mode , major ( devt ) , minor ( devt ) , strerror ( errno ) ) ;
[PATCH] netdev - udevdb+dev.d changes
Here is a patch to change the netdev handling in the database and for
the dev.d/ calls. I applies on top of the udevd.patch, cause klibc has
no sysinfo().
o netdev's are also put into our database now. I want this for the
udevruler gui to get a list of all handled devices.
All devices in the db are stamped with the system uptime value at
the creation time. 'udevinfo -d' prints it.
o the DEVPATH value is the key for udevdb, but if we rename
a netdev, the name is replaced in the kernel, so we add
the changed name to the db to match with the remove event.
NOTE: The dev.d/ scripts still get the original name from the
hotplug call. Should we replace DEVPATH with the new name too?
o We now only add a device to the db, if we have successfully created
the main node or successfully renamed a netdev. This is the main part
of the patch, cause I needed to clean the retval passing trough all
the functions used for node creation.
o DEVNODE sounds a bit ugly for netdev's so I exported DEVNAME too.
Can we change the name?
o I've added a UDEV_NO_DEVD to possibly skip the script execution
and used it in udev-test.pl.
udevstart is the same horror now, if you have scripts with logging
statements in dev.d/ it takes minutes to finish, can we skip the
scripts here too?
o The get_device_type() function is changed to be more strict, cause
'udevinfo -a -p /block/' gets a class device for it and tries to
print the major/minor values.
o bugfix, the RESULT value has now a working newline removal and a test
for this case.
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goto exit ;
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}
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perms :
dbg ( " chmod(%s, %#o) " , file , mode ) ;
if ( chmod ( file , mode ) ! = 0 ) {
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err ( " chmod(%s, %#o) failed: %s " , file , mode , strerror ( errno ) ) ;
[PATCH] netdev - udevdb+dev.d changes
Here is a patch to change the netdev handling in the database and for
the dev.d/ calls. I applies on top of the udevd.patch, cause klibc has
no sysinfo().
o netdev's are also put into our database now. I want this for the
udevruler gui to get a list of all handled devices.
All devices in the db are stamped with the system uptime value at
the creation time. 'udevinfo -d' prints it.
o the DEVPATH value is the key for udevdb, but if we rename
a netdev, the name is replaced in the kernel, so we add
the changed name to the db to match with the remove event.
NOTE: The dev.d/ scripts still get the original name from the
hotplug call. Should we replace DEVPATH with the new name too?
o We now only add a device to the db, if we have successfully created
the main node or successfully renamed a netdev. This is the main part
of the patch, cause I needed to clean the retval passing trough all
the functions used for node creation.
o DEVNODE sounds a bit ugly for netdev's so I exported DEVNAME too.
Can we change the name?
o I've added a UDEV_NO_DEVD to possibly skip the script execution
and used it in udev-test.pl.
udevstart is the same horror now, if you have scripts with logging
statements in dev.d/ it takes minutes to finish, can we skip the
scripts here too?
o The get_device_type() function is changed to be more strict, cause
'udevinfo -a -p /block/' gets a class device for it and tries to
print the major/minor values.
o bugfix, the RESULT value has now a working newline removal and a test
for this case.
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goto exit ;
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}
if ( uid ! = 0 | | gid ! = 0 ) {
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dbg ( " chown(%s, %u, %u) " , file , uid , gid ) ;
if ( chown ( file , uid , gid ) ! = 0 ) {
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err ( " chown(%s, %u, %u) failed: %s " ,
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file , uid , gid , strerror ( errno ) ) ;
[PATCH] netdev - udevdb+dev.d changes
Here is a patch to change the netdev handling in the database and for
the dev.d/ calls. I applies on top of the udevd.patch, cause klibc has
no sysinfo().
o netdev's are also put into our database now. I want this for the
udevruler gui to get a list of all handled devices.
All devices in the db are stamped with the system uptime value at
the creation time. 'udevinfo -d' prints it.
o the DEVPATH value is the key for udevdb, but if we rename
a netdev, the name is replaced in the kernel, so we add
the changed name to the db to match with the remove event.
NOTE: The dev.d/ scripts still get the original name from the
hotplug call. Should we replace DEVPATH with the new name too?
o We now only add a device to the db, if we have successfully created
the main node or successfully renamed a netdev. This is the main part
of the patch, cause I needed to clean the retval passing trough all
the functions used for node creation.
o DEVNODE sounds a bit ugly for netdev's so I exported DEVNAME too.
Can we change the name?
o I've added a UDEV_NO_DEVD to possibly skip the script execution
and used it in udev-test.pl.
udevstart is the same horror now, if you have scripts with logging
statements in dev.d/ it takes minutes to finish, can we skip the
scripts here too?
o The get_device_type() function is changed to be more strict, cause
'udevinfo -a -p /block/' gets a class device for it and tries to
print the major/minor values.
o bugfix, the RESULT value has now a working newline removal and a test
for this case.
2004-04-01 11:12:57 +04:00
goto exit ;
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}
}
[PATCH] netdev - udevdb+dev.d changes
Here is a patch to change the netdev handling in the database and for
the dev.d/ calls. I applies on top of the udevd.patch, cause klibc has
no sysinfo().
o netdev's are also put into our database now. I want this for the
udevruler gui to get a list of all handled devices.
All devices in the db are stamped with the system uptime value at
the creation time. 'udevinfo -d' prints it.
o the DEVPATH value is the key for udevdb, but if we rename
a netdev, the name is replaced in the kernel, so we add
the changed name to the db to match with the remove event.
NOTE: The dev.d/ scripts still get the original name from the
hotplug call. Should we replace DEVPATH with the new name too?
o We now only add a device to the db, if we have successfully created
the main node or successfully renamed a netdev. This is the main part
of the patch, cause I needed to clean the retval passing trough all
the functions used for node creation.
o DEVNODE sounds a bit ugly for netdev's so I exported DEVNAME too.
Can we change the name?
o I've added a UDEV_NO_DEVD to possibly skip the script execution
and used it in udev-test.pl.
udevstart is the same horror now, if you have scripts with logging
statements in dev.d/ it takes minutes to finish, can we skip the
scripts here too?
o The get_device_type() function is changed to be more strict, cause
'udevinfo -a -p /block/' gets a class device for it and tries to
print the major/minor values.
o bugfix, the RESULT value has now a working newline removal and a test
for this case.
2004-04-01 11:12:57 +04:00
exit :
return retval ;
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}
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int udev_node_add ( struct udevice * udev , struct udevice * udev_old )
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{
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char filename [ PATH_SIZE ] ;
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struct name_entry * name_loop ;
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uid_t uid ;
gid_t gid ;
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int tail ;
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int i ;
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int retval = 0 ;
selinux_init ( ) ;
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snprintf ( filename , sizeof ( filename ) , " %s/%s " , udev_root , udev - > name ) ;
filename [ sizeof ( filename ) - 1 ] = ' \0 ' ;
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/* create parent directories if needed */
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if ( strchr ( udev - > name , ' / ' ) )
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create_path ( filename ) ;
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if ( strcmp ( udev - > owner , " root " ) = = 0 )
uid = 0 ;
else {
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char * endptr ;
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unsigned long id ;
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id = strtoul ( udev - > owner , & endptr , 10 ) ;
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if ( endptr [ 0 ] = = ' \0 ' )
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uid = ( uid_t ) id ;
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else
uid = lookup_user ( udev - > owner ) ;
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}
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if ( strcmp ( udev - > group , " root " ) = = 0 )
gid = 0 ;
else {
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char * endptr ;
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unsigned long id ;
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id = strtoul ( udev - > group , & endptr , 10 ) ;
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if ( endptr [ 0 ] = = ' \0 ' )
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gid = ( gid_t ) id ;
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else
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gid = lookup_group ( udev - > group ) ;
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}
2006-01-25 04:18:13 +03:00
info ( " creating device node '%s', major = '%d', minor = '%d', " " mode = '%#o', uid = '%d', gid = '%d' " ,
filename , major ( udev - > devt ) , minor ( udev - > devt ) , udev - > mode , uid , gid ) ;
if ( ! udev - > test_run )
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if ( udev_node_mknod ( udev , filename , udev - > devt , udev - > mode , uid , gid ) ! = 0 ) {
retval = - 1 ;
goto exit ;
}
2006-01-25 04:18:13 +03:00
setenv ( " DEVNAME " , filename , 1 ) ;
2004-02-17 08:44:28 +03:00
[PATCH] netdev - udevdb+dev.d changes
Here is a patch to change the netdev handling in the database and for
the dev.d/ calls. I applies on top of the udevd.patch, cause klibc has
no sysinfo().
o netdev's are also put into our database now. I want this for the
udevruler gui to get a list of all handled devices.
All devices in the db are stamped with the system uptime value at
the creation time. 'udevinfo -d' prints it.
o the DEVPATH value is the key for udevdb, but if we rename
a netdev, the name is replaced in the kernel, so we add
the changed name to the db to match with the remove event.
NOTE: The dev.d/ scripts still get the original name from the
hotplug call. Should we replace DEVPATH with the new name too?
o We now only add a device to the db, if we have successfully created
the main node or successfully renamed a netdev. This is the main part
of the patch, cause I needed to clean the retval passing trough all
the functions used for node creation.
o DEVNODE sounds a bit ugly for netdev's so I exported DEVNAME too.
Can we change the name?
o I've added a UDEV_NO_DEVD to possibly skip the script execution
and used it in udev-test.pl.
udevstart is the same horror now, if you have scripts with logging
statements in dev.d/ it takes minutes to finish, can we skip the
scripts here too?
o The get_device_type() function is changed to be more strict, cause
'udevinfo -a -p /block/' gets a class device for it and tries to
print the major/minor values.
o bugfix, the RESULT value has now a working newline removal and a test
for this case.
2004-04-01 11:12:57 +04:00
/* create all_partitions if requested */
2005-02-14 08:03:06 +03:00
if ( udev - > partitions ) {
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char partitionname [ PATH_SIZE ] ;
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char * attr ;
2005-02-09 10:43:18 +03:00
int range ;
/* take the maximum registered minor range */
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attr = sysfs_attr_get_value ( udev - > dev - > devpath , " range " ) ;
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if ( attr ) {
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range = atoi ( attr ) ;
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if ( range > 1 )
udev - > partitions = range - 1 ;
}
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info ( " creating device partition nodes '%s[1-%i]' " , filename , udev - > partitions ) ;
if ( ! udev - > test_run ) {
for ( i = 1 ; i < = udev - > partitions ; i + + ) {
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dev_t part_devt ;
2005-03-07 06:29:43 +03:00
snprintf ( partitionname , sizeof ( partitionname ) , " %s%d " , filename , i ) ;
partitionname [ sizeof ( partitionname ) - 1 ] = ' \0 ' ;
[PATCH] fix stupid all_partitions bug
> On Mon, 2005-04-11 at 14:55 +0200, Norbert Preining wrote:
> > On Mon, 11 Apr 2005, Kay Sievers wrote:
> > > > brw-rw---- 1 root root 8, 0 2005-04-10 14:58 /dev/sdcard
> > > > brw-rw---- 1 root root 8, 1 2005-04-10 14:58 /dev/sdcard1
> > > > brw-rw---- 1 root root 8, 1 2005-04-10 14:58 /dev/sdcard2
> > > > brw-rw---- 1 root root 8, 1 2005-04-10 14:58 /dev/sdcard3
> > >
> > > This looks broken.
> >
> > Good to hear.
Yeah, I guess it's broken. In create_node() in udev_add.c there is
always added 1 to the minor number, thus the error. The attached patch
should fix this.
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part_devt = makedev ( major ( udev - > devt ) , minor ( udev - > devt ) + i ) ;
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udev_node_mknod ( udev , partitionname , part_devt , udev - > mode , uid , gid ) ;
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}
2004-02-17 08:44:28 +03:00
}
2003-12-07 20:12:07 +03:00
}
[PATCH] netdev - udevdb+dev.d changes
Here is a patch to change the netdev handling in the database and for
the dev.d/ calls. I applies on top of the udevd.patch, cause klibc has
no sysinfo().
o netdev's are also put into our database now. I want this for the
udevruler gui to get a list of all handled devices.
All devices in the db are stamped with the system uptime value at
the creation time. 'udevinfo -d' prints it.
o the DEVPATH value is the key for udevdb, but if we rename
a netdev, the name is replaced in the kernel, so we add
the changed name to the db to match with the remove event.
NOTE: The dev.d/ scripts still get the original name from the
hotplug call. Should we replace DEVPATH with the new name too?
o We now only add a device to the db, if we have successfully created
the main node or successfully renamed a netdev. This is the main part
of the patch, cause I needed to clean the retval passing trough all
the functions used for node creation.
o DEVNODE sounds a bit ugly for netdev's so I exported DEVNAME too.
Can we change the name?
o I've added a UDEV_NO_DEVD to possibly skip the script execution
and used it in udev-test.pl.
udevstart is the same horror now, if you have scripts with logging
statements in dev.d/ it takes minutes to finish, can we skip the
scripts here too?
o The get_device_type() function is changed to be more strict, cause
'udevinfo -a -p /block/' gets a class device for it and tries to
print the major/minor values.
o bugfix, the RESULT value has now a working newline removal and a test
for this case.
2004-04-01 11:12:57 +04:00
/* create symlink(s) if requested */
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if ( ! list_empty ( & udev - > symlink_list ) ) {
char symlinks [ 512 ] = " " ;
list_for_each_entry ( name_loop , & udev - > symlink_list , node ) {
char linktarget [ PATH_SIZE ] ;
snprintf ( filename , sizeof ( filename ) , " %s/%s " , udev_root , name_loop - > name ) ;
filename [ sizeof ( filename ) - 1 ] = ' \0 ' ;
dbg ( " symlink '%s' to node '%s' requested " , filename , udev - > name ) ;
if ( ! udev - > test_run )
if ( strchr ( filename , ' / ' ) )
create_path ( filename ) ;
/* optimize relative link */
linktarget [ 0 ] = ' \0 ' ;
i = 0 ;
tail = 0 ;
while ( udev - > name [ i ] & & ( udev - > name [ i ] = = name_loop - > name [ i ] ) ) {
if ( udev - > name [ i ] = = ' / ' )
tail = i + 1 ;
i + + ;
}
while ( name_loop - > name [ i ] ! = ' \0 ' ) {
if ( name_loop - > name [ i ] = = ' / ' )
strlcat ( linktarget , " ../ " , sizeof ( linktarget ) ) ;
i + + ;
}
2003-12-07 20:12:07 +03:00
2005-12-17 18:20:51 +03:00
strlcat ( linktarget , & udev - > name [ tail ] , sizeof ( linktarget ) ) ;
info ( " creating symlink '%s' to '%s' " , filename , linktarget ) ;
if ( ! udev - > test_run ) {
unlink ( filename ) ;
selinux_setfscreatecon ( filename , NULL , S_IFLNK ) ;
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if ( symlink ( linktarget , filename ) ! = 0 )
err ( " symlink(%s, %s) failed: %s " , linktarget , filename , strerror ( errno ) ) ;
2005-12-17 18:20:51 +03:00
selinux_resetfscreatecon ( ) ;
}
2003-12-07 20:12:07 +03:00
2005-12-17 18:20:51 +03:00
strlcat ( symlinks , filename , sizeof ( symlinks ) ) ;
strlcat ( symlinks , " " , sizeof ( symlinks ) ) ;
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}
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remove_trailing_chars ( symlinks , ' ' ) ;
setenv ( " DEVLINKS " , symlinks , 1 ) ;
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}
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exit :
selinux_exit ( ) ;
return retval ;
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}
2006-04-13 00:08:05 +04:00
void udev_node_remove_symlinks ( struct udevice * udev )
[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
{
2006-04-06 00:29:33 +04:00
char filename [ PATH_SIZE ] ;
struct name_entry * name_loop ;
struct stat stats ;
[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
2006-04-06 00:29:33 +04:00
if ( ! list_empty ( & udev - > symlink_list ) ) {
char symlinks [ 512 ] = " " ;
[PATCH] netdev - udevdb+dev.d changes
Here is a patch to change the netdev handling in the database and for
the dev.d/ calls. I applies on top of the udevd.patch, cause klibc has
no sysinfo().
o netdev's are also put into our database now. I want this for the
udevruler gui to get a list of all handled devices.
All devices in the db are stamped with the system uptime value at
the creation time. 'udevinfo -d' prints it.
o the DEVPATH value is the key for udevdb, but if we rename
a netdev, the name is replaced in the kernel, so we add
the changed name to the db to match with the remove event.
NOTE: The dev.d/ scripts still get the original name from the
hotplug call. Should we replace DEVPATH with the new name too?
o We now only add a device to the db, if we have successfully created
the main node or successfully renamed a netdev. This is the main part
of the patch, cause I needed to clean the retval passing trough all
the functions used for node creation.
o DEVNODE sounds a bit ugly for netdev's so I exported DEVNAME too.
Can we change the name?
o I've added a UDEV_NO_DEVD to possibly skip the script execution
and used it in udev-test.pl.
udevstart is the same horror now, if you have scripts with logging
statements in dev.d/ it takes minutes to finish, can we skip the
scripts here too?
o The get_device_type() function is changed to be more strict, cause
'udevinfo -a -p /block/' gets a class device for it and tries to
print the major/minor values.
o bugfix, the RESULT value has now a working newline removal and a test
for this case.
2004-04-01 11:12:57 +04:00
2006-04-06 00:29:33 +04:00
list_for_each_entry ( name_loop , & udev - > symlink_list , node ) {
snprintf ( filename , sizeof ( filename ) , " %s/%s " , udev_root , name_loop - > name ) ;
filename [ sizeof ( filename ) - 1 ] = ' \0 ' ;
[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
2006-04-06 00:29:33 +04:00
if ( stat ( filename , & stats ) ! = 0 ) {
dbg ( " symlink '%s' not found " , filename ) ;
continue ;
}
if ( udev - > devt & & stats . st_rdev ! = udev - > devt ) {
info ( " symlink '%s' points to a different device, skip removal " , filename ) ;
continue ;
}
[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
2006-04-06 00:29:33 +04:00
info ( " removing symlink '%s' " , filename ) ;
unlink ( filename ) ;
[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
2006-04-06 00:29:33 +04:00
if ( strchr ( filename , ' / ' ) )
delete_path ( filename ) ;
[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
2006-04-06 00:29:33 +04:00
strlcat ( symlinks , filename , sizeof ( symlinks ) ) ;
strlcat ( symlinks , " " , sizeof ( symlinks ) ) ;
}
2003-07-21 07:48:48 +04:00
2006-04-06 00:29:33 +04:00
remove_trailing_chars ( symlinks , ' ' ) ;
if ( symlinks [ 0 ] ! = ' \0 ' )
setenv ( " DEVLINKS " , symlinks , 1 ) ;
}
2006-04-13 00:08:05 +04:00
}
int udev_node_remove ( struct udevice * udev )
{
char filename [ PATH_SIZE ] ;
char partitionname [ PATH_SIZE ] ;
struct stat stats ;
int retval ;
int num ;
udev_node_remove_symlinks ( udev ) ;
2004-10-19 06:28:39 +04:00
2006-04-06 00:29:33 +04:00
snprintf ( filename , sizeof ( filename ) , " %s/%s " , udev_root , udev - > name ) ;
filename [ sizeof ( filename ) - 1 ] = ' \0 ' ;
2004-04-01 12:59:58 +04:00
2006-04-06 00:29:33 +04:00
if ( stat ( filename , & stats ) ! = 0 ) {
dbg ( " device node '%s' not found " , filename ) ;
return - 1 ;
}
if ( udev - > devt & & stats . st_rdev ! = udev - > devt ) {
info ( " device node '%s' points to a different device, skip removal " , filename ) ;
return - 1 ;
}
info ( " removing device node '%s' " , filename ) ;
retval = unlink_secure ( filename ) ;
if ( retval )
return retval ;
setenv ( " DEVNAME " , filename , 1 ) ;
num = udev - > partitions ;
if ( num > 0 ) {
2006-04-13 00:08:05 +04:00
int i ;
2006-04-06 00:29:33 +04:00
info ( " removing all_partitions '%s[1-%i]' " , filename , num ) ;
if ( num > 255 ) {
info ( " garbage from udev database, skip all_partitions removal " ) ;
return - 1 ;
}
for ( i = 1 ; i < = num ; i + + ) {
snprintf ( partitionname , sizeof ( partitionname ) , " %s%d " , filename , i ) ;
partitionname [ sizeof ( partitionname ) - 1 ] = ' \0 ' ;
unlink_secure ( partitionname ) ;
2004-10-19 06:28:39 +04:00
}
[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
}
2003-07-21 07:48:48 +04:00
2006-04-06 00:29:33 +04:00
if ( strchr ( udev - > name , ' / ' ) )
delete_path ( filename ) ;
2003-07-21 07:48:48 +04:00
return retval ;
}