[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 :)
This commit is contained in:
kay.sievers@vrfy.org
Greg KH
parent
3e33961b45
commit
f61d732a02
10
namedev.c
10
namedev.c
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@ -836,12 +836,22 @@ int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *ud
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}
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}
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/* no rule was found for the net device */
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if (udev->type == 'n') {
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dbg("no name for net device '%s' configured", udev->kernel_name);
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return -1;
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}
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/* no rule was found so we use the kernel name */
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strfieldcpy(udev->name, udev->kernel_name);
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goto done;
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found:
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apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device);
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if (udev->type == 'n')
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return 0;
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udev->partitions = dev->partitions;
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strfieldcpy(udev->config_file, dev->config_file);
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udev->config_line = dev->config_line;
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@ -35,7 +35,7 @@ my @tests = (
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{
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desc => "label test of scsi disc",
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subsys => "block",
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devpath => "block/sda",
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devpath => "/block/sda",
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exp_name => "boot_disk" ,
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conf => <<EOF
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BUS="scsi", SYSFS{vendor}="IBM-ESXS", NAME="boot_disk%n"
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@ -45,7 +45,7 @@ EOF
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{
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desc => "label test of scsi partition",
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subsys => "block",
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devpath => "block/sda/sda1",
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devpath => "/block/sda/sda1",
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exp_name => "boot_disk1" ,
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conf => <<EOF
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BUS="scsi", SYSFS{vendor}="IBM-ESXS", NAME="boot_disk%n"
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@ -54,7 +54,7 @@ EOF
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{
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desc => "label test of pattern match",
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subsys => "block",
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devpath => "block/sda/sda1",
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devpath => "/block/sda/sda1",
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exp_name => "boot_disk1" ,
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conf => <<EOF
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BUS="scsi", SYSFS{vendor}="?IBM-ESXS", NAME="boot_disk%n-1"
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@ -66,7 +66,7 @@ EOF
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{
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desc => "label test of multiple sysfs files",
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subsys => "block",
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devpath => "block/sda/sda1",
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devpath => "/block/sda/sda1",
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exp_name => "boot_disk1" ,
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conf => <<EOF
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BUS="scsi", SYSFS{vendor}="IBM-ESXS", SYSFS{model}="ST336605LW !#", NAME="boot_diskX%n"
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@ -76,7 +76,7 @@ EOF
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{
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desc => "label test of max sysfs files",
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subsys => "block",
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devpath => "block/sda/sda1",
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devpath => "/block/sda/sda1",
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exp_name => "boot_disk1" ,
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conf => <<EOF
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BUS="scsi", SYSFS{vendor}="IBM-ESXS", SYSFS{model}="ST336605LW !#", SYSFS{scsi_level}="4", SYSFS{rev}="B245", SYSFS{type}="2", SYSFS{queue_depth}="32", NAME="boot_diskXX%n"
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@ -86,7 +86,7 @@ EOF
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{
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desc => "catch device by *",
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subsys => "tty",
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devpath => "class/tty/ttyUSB0",
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devpath => "/class/tty/ttyUSB0",
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exp_name => "visor/0" ,
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conf => <<EOF
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KERNEL="ttyUSB*", NAME="visor/%n"
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@ -95,7 +95,7 @@ EOF
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{
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desc => "catch device by * - take 2",
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subsys => "tty",
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devpath => "class/tty/ttyUSB0",
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devpath => "/class/tty/ttyUSB0",
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exp_name => "visor/0" ,
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conf => <<EOF
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KERNEL="*USB1", NAME="bad"
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@ -105,7 +105,7 @@ EOF
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{
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desc => "catch device by ?",
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subsys => "tty",
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devpath => "class/tty/ttyUSB0",
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devpath => "/class/tty/ttyUSB0",
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exp_name => "visor/0" ,
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conf => <<EOF
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KERNEL="ttyUSB??*", NAME="visor/%n-1"
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@ -116,7 +116,7 @@ EOF
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{
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desc => "catch device by character class",
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subsys => "tty",
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devpath => "class/tty/ttyUSB0",
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devpath => "/class/tty/ttyUSB0",
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exp_name => "visor/0" ,
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conf => <<EOF
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KERNEL="ttyUSB[A-Z]*", NAME="visor/%n-1"
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@ -127,7 +127,7 @@ EOF
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{
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desc => "replace kernel name",
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subsys => "tty",
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devpath => "class/tty/ttyUSB0",
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devpath => "/class/tty/ttyUSB0",
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exp_name => "visor" ,
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conf => <<EOF
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KERNEL="ttyUSB0", NAME="visor"
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@ -136,7 +136,7 @@ EOF
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{
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desc => "Handle comment lines in config file (and replace kernel name)",
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subsys => "tty",
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devpath => "class/tty/ttyUSB0",
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devpath => "/class/tty/ttyUSB0",
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exp_name => "visor" ,
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conf => <<EOF
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# this is a comment
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@ -147,7 +147,7 @@ EOF
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{
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desc => "Handle comment lines in config file with whitespace (and replace kernel name)",
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subsys => "tty",
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devpath => "class/tty/ttyUSB0",
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devpath => "/class/tty/ttyUSB0",
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exp_name => "visor" ,
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conf => <<EOF
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# this is a comment with whitespace before the comment
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@ -158,7 +158,7 @@ EOF
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{
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desc => "Handle empty lines in config file (and replace kernel name)",
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subsys => "tty",
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devpath => "class/tty/ttyUSB0",
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devpath => "/class/tty/ttyUSB0",
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exp_name => "visor" ,
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conf => <<EOF
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@ -169,7 +169,7 @@ EOF
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{
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desc => "subdirectory handling",
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subsys => "tty",
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devpath => "class/tty/ttyUSB0",
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devpath => "/class/tty/ttyUSB0",
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exp_name => "sub/direct/ory/visor" ,
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conf => <<EOF
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KERNEL="ttyUSB0", NAME="sub/direct/ory/visor"
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@ -178,7 +178,7 @@ EOF
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{
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desc => "place on bus of scsi partition",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "first_disk3" ,
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conf => <<EOF
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BUS="scsi", PLACE="0:0:0:0", NAME="first_disk%n"
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@ -187,7 +187,7 @@ EOF
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{
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desc => "test NAME substitution chars",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "Major:8:minor:3:kernelnumber:3:bus:0:0:0:0" ,
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conf => <<EOF
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BUS="scsi", PLACE="0:0:0:0", NAME="Major:%M:minor:%m:kernelnumber:%n:bus:%b"
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@ -196,7 +196,7 @@ EOF
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{
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desc => "test NAME substitution chars (with length limit)",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "M8-m3-n3-b0:0-sIBM" ,
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conf => <<EOF
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BUS="scsi", PLACE="0:0:0:0", NAME="M%M-m%m-n%n-b%3b-s%3s{vendor}"
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@ -205,7 +205,7 @@ EOF
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{
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desc => "old style SYSFS_ attribute",
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subsys => "block",
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devpath => "block/sda",
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devpath => "/block/sda",
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exp_name => "good" ,
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conf => <<EOF
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BUS="scsi", SYSFS_vendor="IBM-ESXS", NAME="good"
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@ -214,7 +214,7 @@ EOF
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{
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desc => "sustitution of sysfs value (%s{file})",
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subsys => "block",
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devpath => "block/sda",
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devpath => "/block/sda",
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exp_name => "disk-IBM-ESXS-sda" ,
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conf => <<EOF
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BUS="scsi", SYSFS{vendor}="IBM-ESXS", NAME="disk-%s{vendor}-%k"
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@ -224,7 +224,7 @@ EOF
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{
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desc => "program result substitution",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "special-device-3" ,
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conf => <<EOF
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BUS="scsi", PROGRAM="/bin/echo -n special-device", RESULT="-special-*", NAME="%c-1-%n"
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@ -237,7 +237,7 @@ EOF
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{
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desc => "program result substitution",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "test-0:0:0:0" ,
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conf => <<EOF
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BUS="scsi", PROGRAM="/bin/echo -n test-%b", RESULT="test-0:0*", NAME="%c"
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@ -246,7 +246,7 @@ EOF
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{
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desc => "program with escaped format char (tricky: callout returns format char!)",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "escape-3" ,
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conf => <<EOF
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BUS="scsi", PROGRAM="/bin/echo -n escape-%%n", KERNEL="sda3", NAME="%c"
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@ -255,7 +255,7 @@ EOF
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{
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desc => "program with lots of arguments",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "foo9" ,
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conf => <<EOF
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BUS="scsi", PROGRAM="/bin/echo -n foo3 foo4 foo5 foo6 foo7 foo8 foo9", KERNEL="sda3", NAME="%c{7}"
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@ -264,7 +264,7 @@ EOF
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{
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desc => "program with subshell",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "bar9" ,
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conf => <<EOF
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BUS="scsi", PROGRAM="/bin/sh -c 'echo foo3 foo4 foo5 foo6 foo7 foo8 foo9 | sed s/foo9/bar9/'", KERNEL="sda3", NAME="%c{7}"
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@ -273,7 +273,7 @@ EOF
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{
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desc => "program arguments combined with apostrophes",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "foo7" ,
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conf => <<EOF
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BUS="scsi", PROGRAM="/bin/echo -n 'foo3 foo4' 'foo5 foo6 foo7 foo8'", KERNEL="sda3", NAME="%c{5}"
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@ -282,7 +282,7 @@ EOF
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{
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desc => "characters before the %c{N} substitution",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "my-foo9" ,
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conf => <<EOF
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BUS="scsi", PROGRAM="/bin/echo -n foo3 foo4 foo5 foo6 foo7 foo8 foo9", KERNEL="sda3", NAME="my-%c{7}"
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@ -291,7 +291,7 @@ EOF
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{
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desc => "substitute the second to last argument",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "my-foo8" ,
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conf => <<EOF
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BUS="scsi", PROGRAM="/bin/echo -n foo3 foo4 foo5 foo6 foo7 foo8 foo9", KERNEL="sda3", NAME="my-%c{6}"
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@ -300,7 +300,7 @@ EOF
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{
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desc => "program result substitution (numbered part of)",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "link1" ,
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conf => <<EOF
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BUS="scsi", PROGRAM="/bin/echo -n node link1 link2", RESULT="node *", NAME="%c{1}", SYMLINK="%c{2} %c{3}"
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@ -309,7 +309,7 @@ EOF
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{
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desc => "program result substitution (numbered part of+)",
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subsys => "block",
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devpath => "block/sda/sda3",
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devpath => "/block/sda/sda3",
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exp_name => "link3" ,
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conf => <<EOF
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BUS="scsi", PROGRAM="/bin/echo -n node link1 link2 link3 link4", RESULT="node *", NAME="%c{1}", SYMLINK="%c{2+}"
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@ -318,7 +318,7 @@ EOF
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{
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desc => "invalid program for device with no bus",
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subsys => "tty",
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devpath => "class/tty/console",
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devpath => "/class/tty/console",
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exp_name => "TTY" ,
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conf => <<EOF
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BUS="scsi", PROGRAM="/bin/echo -n foo", RESULT="foo", NAME="foo"
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@ -328,7 +328,7 @@ EOF
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{
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desc => "valid program for device with no bus",
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subsys => "tty",
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devpath => "class/tty/console",
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devpath => "/class/tty/console",
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exp_name => "foo" ,
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conf => <<EOF
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PROGRAM="/bin/echo -n foo", RESULT="foo", NAME="foo"
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@ -338,7 +338,7 @@ EOF
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{
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desc => "invalid label for device with no bus",
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subsys => "tty",
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devpath => "class/tty/console",
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devpath => "/class/tty/console",
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exp_name => "TTY" ,
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conf => <<EOF
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BUS="foo", SYSFS{dev}="5:1", NAME="foo"
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@ -348,7 +348,7 @@ EOF
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{
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desc => "valid label for device with no bus",
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subsys => "tty",
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devpath => "class/tty/console",
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devpath => "/class/tty/console",
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exp_name => "foo" ,
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conf => <<EOF
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SYSFS{dev}="5:1", NAME="foo"
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@ -358,7 +358,7 @@ EOF
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{
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desc => "program and bus type match",
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subsys => "block",
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devpath => "block/sda",
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devpath => "/block/sda",
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exp_name => "scsi-0:0:0:0" ,
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conf => <<EOF
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BUS="usb", PROGRAM="/bin/echo -n usb-%b", NAME="%c"
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@ -369,7 +369,7 @@ EOF
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{
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desc => "symlink creation (same directory)",
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subsys => "tty",
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devpath => "class/tty/ttyUSB0",
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devpath => "/class/tty/ttyUSB0",
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exp_name => "visor0" ,
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conf => <<EOF
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KERNEL="ttyUSB[0-9]*", NAME="ttyUSB%n", SYMLINK="visor%n"
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@ -378,7 +378,7 @@ EOF
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{
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desc => "symlink creation (relative link back)",
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subsys => "block",
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devpath => "block/sda/sda2",
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devpath => "/block/sda/sda2",
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exp_name => "1/2/a/b/symlink" ,
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conf => <<EOF
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BUS="scsi", SYSFS{vendor}="IBM-ESXS", NAME="1/2/node", SYMLINK="1/2/a/b/symlink"
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@ -387,7 +387,7 @@ EOF
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{
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desc => "symlink creation (relative link forward)",
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subsys => "block",
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devpath => "block/sda/sda2",
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devpath => "/block/sda/sda2",
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exp_name => "1/2/symlink" ,
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conf => <<EOF
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BUS="scsi", SYSFS{vendor}="IBM-ESXS", NAME="1/2/a/b/node", SYMLINK="1/2/symlink"
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@ -396,7 +396,7 @@ EOF
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{
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desc => "symlink creation (relative link back and forward)",
|
||||
subsys => "block",
|
||||
devpath => "block/sda/sda2",
|
||||
devpath => "/block/sda/sda2",
|
||||
exp_name => "1/2/c/d/symlink" ,
|
||||
conf => <<EOF
|
||||
BUS="scsi", SYSFS{vendor}="IBM-ESXS", NAME="1/2/a/b/node", SYMLINK="1/2/c/d/symlink"
|
||||
|
|
@ -405,7 +405,7 @@ EOF
|
|||
{
|
||||
desc => "multiple symlinks",
|
||||
subsys => "tty",
|
||||
devpath => "class/tty/ttyUSB0",
|
||||
devpath => "/class/tty/ttyUSB0",
|
||||
exp_name => "second-0" ,
|
||||
conf => <<EOF
|
||||
KERNEL="ttyUSB0", NAME="visor", SYMLINK="first-%n second-%n third-%n"
|
||||
|
|
@ -414,7 +414,7 @@ EOF
|
|||
{
|
||||
desc => "create all possible partitions",
|
||||
subsys => "block",
|
||||
devpath => "block/sda",
|
||||
devpath => "/block/sda",
|
||||
exp_name => "boot_disk15" ,
|
||||
conf => <<EOF
|
||||
BUS="scsi", SYSFS{vendor}="IBM-ESXS", NAME{all_partitions}="boot_disk"
|
||||
|
|
@ -423,7 +423,7 @@ EOF
|
|||
{
|
||||
desc => "sysfs parent hierarchy",
|
||||
subsys => "tty",
|
||||
devpath => "class/tty/ttyUSB0",
|
||||
devpath => "/class/tty/ttyUSB0",
|
||||
exp_name => "visor" ,
|
||||
conf => <<EOF
|
||||
SYSFS{idProduct}="2008", NAME="visor"
|
||||
|
|
@ -432,7 +432,7 @@ EOF
|
|||
{
|
||||
desc => "name test with ! in the name",
|
||||
subsys => "block",
|
||||
devpath => "block/rd!c0d0",
|
||||
devpath => "/block/rd!c0d0",
|
||||
exp_name => "rd/c0d0" ,
|
||||
conf => <<EOF
|
||||
BUS="scsi", NAME="%k"
|
||||
|
|
@ -442,7 +442,7 @@ EOF
|
|||
{
|
||||
desc => "name test with ! in the name, but no matching rule",
|
||||
subsys => "block",
|
||||
devpath => "block/rd!c0d0",
|
||||
devpath => "/block/rd!c0d0",
|
||||
exp_name => "rd/c0d0" ,
|
||||
conf => <<EOF
|
||||
KERNEL="ttyUSB0", NAME="visor"
|
||||
|
|
@ -451,7 +451,7 @@ EOF
|
|||
{
|
||||
desc => "ID rule",
|
||||
subsys => "block",
|
||||
devpath => "block/sda",
|
||||
devpath => "/block/sda",
|
||||
exp_name => "scsi-0:0:0:0",
|
||||
conf => <<EOF
|
||||
BUS="usb", ID="0:0:0:0", NAME="not-scsi"
|
||||
|
|
@ -464,7 +464,7 @@ EOF
|
|||
{
|
||||
desc => "ID wildcard all",
|
||||
subsys => "block",
|
||||
devpath => "block/sda",
|
||||
devpath => "/block/sda",
|
||||
exp_name => "scsi-0:0:0:0",
|
||||
conf => <<EOF
|
||||
BUS="scsi", ID="*:1", NAME="no-match"
|
||||
|
|
@ -477,7 +477,7 @@ EOF
|
|||
{
|
||||
desc => "ID wildcard partial",
|
||||
subsys => "block",
|
||||
devpath => "block/sda",
|
||||
devpath => "/block/sda",
|
||||
exp_name => "scsi-0:0:0:0",
|
||||
conf => <<EOF
|
||||
BUS="scsi", ID="*:0", NAME="scsi-0:0:0:0"
|
||||
|
|
@ -487,7 +487,7 @@ EOF
|
|||
{
|
||||
desc => "ID wildcard partial 2",
|
||||
subsys => "block",
|
||||
devpath => "block/sda",
|
||||
devpath => "/block/sda",
|
||||
exp_name => "scsi-0:0:0:0",
|
||||
conf => <<EOF
|
||||
BUS="scsi", ID="*:0:0:0", NAME="scsi-0:0:0:0"
|
||||
|
|
@ -497,7 +497,7 @@ EOF
|
|||
{
|
||||
desc => "ignore SYSFS attribute whitespace",
|
||||
subsys => "block",
|
||||
devpath => "block/sda",
|
||||
devpath => "/block/sda",
|
||||
exp_name => "ignored",
|
||||
conf => <<EOF
|
||||
BUS="scsi", SYSFS{whitespace_test}="WHITE SPACE", NAME="ignored"
|
||||
|
|
@ -506,7 +506,7 @@ EOF
|
|||
{
|
||||
desc => "do not ignore SYSFS attribute whitespace",
|
||||
subsys => "block",
|
||||
devpath => "block/sda",
|
||||
devpath => "/block/sda",
|
||||
exp_name => "matched-with-space",
|
||||
conf => <<EOF
|
||||
BUS="scsi", SYSFS{whitespace_test}="WHITE SPACE ", NAME="wrong-to-ignore"
|
||||
|
|
@ -516,7 +516,7 @@ EOF
|
|||
{
|
||||
desc => "SYMLINK only rule",
|
||||
subsys => "block",
|
||||
devpath => "block/sda",
|
||||
devpath => "/block/sda",
|
||||
exp_name => "symlink-only2",
|
||||
conf => <<EOF
|
||||
BUS="scsi", KERNEL="sda", SYMLINK="symlink-only1"
|
||||
|
|
@ -527,7 +527,7 @@ EOF
|
|||
{
|
||||
desc => "permissions test",
|
||||
subsys => "block",
|
||||
devpath => "block/sda",
|
||||
devpath => "/block/sda",
|
||||
exp_name => "node",
|
||||
exp_perms => "5000::0444",
|
||||
conf => <<EOF
|
||||
|
|
@ -537,7 +537,7 @@ EOF
|
|||
{
|
||||
desc => "major/minor number test",
|
||||
subsys => "block",
|
||||
devpath => "block/sda",
|
||||
devpath => "/block/sda",
|
||||
exp_name => "node",
|
||||
exp_majorminor => "8:0",
|
||||
conf => <<EOF
|
||||
|
|
@ -547,7 +547,7 @@ EOF
|
|||
{
|
||||
desc => "big minor number test",
|
||||
subsys => "i2c-dev",
|
||||
devpath => "class/i2c-dev/i2c-300",
|
||||
devpath => "/class/i2c-dev/i2c-300",
|
||||
exp_name => "node",
|
||||
exp_majorminor => "89:300",
|
||||
conf => <<EOF
|
||||
|
|
@ -557,7 +557,7 @@ EOF
|
|||
{
|
||||
desc => "big major number test",
|
||||
subsys => "i2c-dev",
|
||||
devpath => "class/i2c-dev/i2c-fake1",
|
||||
devpath => "/class/i2c-dev/i2c-fake1",
|
||||
exp_name => "node",
|
||||
exp_majorminor => "4095:1",
|
||||
conf => <<EOF
|
||||
|
|
@ -567,7 +567,7 @@ EOF
|
|||
{
|
||||
desc => "big major and big minor number test",
|
||||
subsys => "i2c-dev",
|
||||
devpath => "class/i2c-dev/i2c-fake2",
|
||||
devpath => "/class/i2c-dev/i2c-fake2",
|
||||
exp_name => "node",
|
||||
exp_majorminor => "4094:89999",
|
||||
conf => <<EOF
|
||||
|
|
|
|||
86
udev-add.c
86
udev-add.c
|
|
@ -30,6 +30,10 @@
|
|||
#include <sys/stat.h>
|
||||
#include <sys/types.h>
|
||||
#include <grp.h>
|
||||
#include <net/if.h>
|
||||
#include <sys/socket.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <linux/sockios.h>
|
||||
#ifndef __KLIBC__
|
||||
#include <pwd.h>
|
||||
#include <utmp.h>
|
||||
|
|
@ -342,16 +346,16 @@ exit:
|
|||
/* wait for the "dev" file to show up in the directory in sysfs.
|
||||
* If it doesn't happen in about 10 seconds, give up.
|
||||
*/
|
||||
#define SECONDS_TO_WAIT_FOR_DEV 10
|
||||
static int sleep_for_dev(char *path)
|
||||
#define SECONDS_TO_WAIT_FOR_FILE 10
|
||||
static int sleep_for_file(char *path, char* file)
|
||||
{
|
||||
char filename[SYSFS_PATH_MAX + 6];
|
||||
int loop = SECONDS_TO_WAIT_FOR_DEV;
|
||||
int loop = SECONDS_TO_WAIT_FOR_FILE;
|
||||
int retval;
|
||||
|
||||
strfieldcpy(filename, sysfs_path);
|
||||
strfieldcat(filename, path);
|
||||
strfieldcat(filename, "/dev");
|
||||
strfieldcat(filename, file);
|
||||
|
||||
while (loop--) {
|
||||
struct stat buf;
|
||||
|
|
@ -369,6 +373,30 @@ exit:
|
|||
return retval;
|
||||
}
|
||||
|
||||
static int rename_net_if(struct udevice *dev)
|
||||
{
|
||||
int sk;
|
||||
struct ifreq ifr;
|
||||
int retval;
|
||||
|
||||
sk = socket(PF_INET, SOCK_DGRAM, 0);
|
||||
if (sk < 0) {
|
||||
dbg("error opening socket");
|
||||
return -1;
|
||||
}
|
||||
|
||||
memset(&ifr, 0x00, sizeof(struct ifreq));
|
||||
strfieldcpy(ifr.ifr_name, dev->kernel_name);
|
||||
strfieldcpy(ifr.ifr_newname, dev->name);
|
||||
|
||||
dbg("changing net interface name from '%s' to '%s'", dev->kernel_name, dev->name);
|
||||
retval = ioctl(sk, SIOCSIFNAME, &ifr);
|
||||
if (retval != 0)
|
||||
dbg("error changing net interface name");
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
int udev_add_device(char *path, char *subsystem, int fake)
|
||||
{
|
||||
struct sysfs_class_device *class_dev = NULL;
|
||||
|
|
@ -378,39 +406,61 @@ int udev_add_device(char *path, char *subsystem, int fake)
|
|||
memset(&dev, 0x00, sizeof(dev));
|
||||
|
||||
/* for now, the block layer is the only place where block devices are */
|
||||
if (strcmp(subsystem, "block") == 0)
|
||||
dev.type = 'b';
|
||||
else
|
||||
dev.type = 'c';
|
||||
|
||||
retval = sleep_for_dev(path);
|
||||
if (retval != 0)
|
||||
goto exit;
|
||||
dev.type = get_device_type(path, subsystem);
|
||||
|
||||
switch (dev.type) {
|
||||
case 'b':
|
||||
case 'c':
|
||||
retval = sleep_for_file(path, "/dev");
|
||||
break;
|
||||
|
||||
case 'n':
|
||||
retval = sleep_for_file(path, "/address");
|
||||
break;
|
||||
|
||||
default:
|
||||
dbg("unknown device type '%c'", dev.type);
|
||||
retval = -EINVAL;
|
||||
}
|
||||
|
||||
class_dev = get_class_dev(path);
|
||||
if (class_dev == NULL)
|
||||
goto exit;
|
||||
|
||||
retval = get_major_minor(class_dev, &dev);
|
||||
if (retval != 0) {
|
||||
dbg("get_major_minor failed");
|
||||
goto exit;
|
||||
if (dev.type == 'b' || dev.type == 'c') {
|
||||
retval = get_major_minor(class_dev, &dev);
|
||||
if (retval != 0) {
|
||||
dbg("get_major_minor failed");
|
||||
goto exit;
|
||||
}
|
||||
}
|
||||
|
||||
retval = namedev_name_device(class_dev, &dev);
|
||||
if (retval != 0)
|
||||
goto exit;
|
||||
|
||||
if (!fake) {
|
||||
if (!fake && (dev.type == 'b' || dev.type == 'c')) {
|
||||
retval = udevdb_add_dev(path, &dev);
|
||||
if (retval != 0)
|
||||
dbg("udevdb_add_dev failed, but we are going to try "
|
||||
"to create the node anyway. But remove might not "
|
||||
"work properly for this device.");
|
||||
|
||||
}
|
||||
|
||||
dbg("name='%s'", dev.name);
|
||||
retval = create_node(&dev, fake);
|
||||
switch (dev.type) {
|
||||
case 'b':
|
||||
case 'c':
|
||||
retval = create_node(&dev, fake);
|
||||
break;
|
||||
|
||||
case 'n':
|
||||
retval = rename_net_if(&dev);
|
||||
if (retval != 0)
|
||||
dbg("net device naming failed");
|
||||
break;
|
||||
}
|
||||
|
||||
if ((retval == 0) && (!fake))
|
||||
dev_d_send(&dev, subsystem);
|
||||
|
|
|
|||
|
|
@ -135,22 +135,38 @@ int udev_remove_device(char *path, char *subsystem)
|
|||
char *temp;
|
||||
int retval;
|
||||
|
||||
memset(&dev, 0, sizeof(dev));
|
||||
memset(&dev, 0x00, sizeof(dev));
|
||||
|
||||
retval = udevdb_get_dev(path, &dev);
|
||||
if (retval) {
|
||||
dbg("'%s' not found in database, falling back on default name", path);
|
||||
temp = strrchr(path, '/');
|
||||
if (temp == NULL)
|
||||
return -ENODEV;
|
||||
strfieldcpy(dev.name, &temp[1]);
|
||||
dev.type = get_device_type(path, subsystem);
|
||||
|
||||
switch (dev.type) {
|
||||
case 'b':
|
||||
case 'c':
|
||||
retval = udevdb_get_dev(path, &dev);
|
||||
if (retval) {
|
||||
dbg("'%s' not found in database, falling back on default name", path);
|
||||
temp = strrchr(path, '/');
|
||||
if (temp == NULL)
|
||||
return -ENODEV;
|
||||
strfieldcpy(dev.name, &temp[1]);
|
||||
}
|
||||
|
||||
dbg("name='%s'", dev.name);
|
||||
udevdb_delete_dev(path);
|
||||
|
||||
dev_d_send(&dev, subsystem);
|
||||
|
||||
retval = delete_node(&dev);
|
||||
break;
|
||||
|
||||
case 'n':
|
||||
retval = 0;
|
||||
break;
|
||||
|
||||
default:
|
||||
dbg("unknown device type '%c'", dev.type);
|
||||
retval = -EINVAL;
|
||||
}
|
||||
|
||||
dbg("name is '%s'", dev.name);
|
||||
udevdb_delete_dev(path);
|
||||
|
||||
dev_d_send(&dev, subsystem);
|
||||
|
||||
retval = delete_node(&dev);
|
||||
return retval;
|
||||
}
|
||||
|
|
|
|||
26
udev.c
26
udev.c
|
|
@ -68,7 +68,6 @@ static void sig_handler(int signum)
|
|||
}
|
||||
|
||||
static char *subsystem_blacklist[] = {
|
||||
"net",
|
||||
"scsi_host",
|
||||
"scsi_device",
|
||||
"usb_host",
|
||||
|
|
@ -85,6 +84,7 @@ static int udev_hotplug(void)
|
|||
int retval = -EINVAL;
|
||||
int i;
|
||||
struct sigaction act;
|
||||
const int nofake = 0;
|
||||
|
||||
action = get_action();
|
||||
if (!action) {
|
||||
|
|
@ -137,23 +137,23 @@ static int udev_hotplug(void)
|
|||
|
||||
if (strcmp(action, "add") == 0) {
|
||||
namedev_init();
|
||||
retval = udev_add_device(devpath, subsystem, 0);
|
||||
} else {
|
||||
if (strcmp(action, "remove") == 0) {
|
||||
retval = udev_remove_device(devpath, subsystem);
|
||||
} else {
|
||||
dbg("unknown action '%s'", action);
|
||||
retval = -EINVAL;
|
||||
}
|
||||
retval = udev_add_device(devpath, subsystem, nofake);
|
||||
goto action_done;
|
||||
}
|
||||
|
||||
if (strcmp(action, "remove") == 0) {
|
||||
retval = udev_remove_device(devpath, subsystem);
|
||||
goto action_done;
|
||||
}
|
||||
|
||||
dbg("unknown action '%s'", action);
|
||||
retval = -EINVAL;
|
||||
|
||||
action_done:
|
||||
udevdb_exit();
|
||||
|
||||
exit:
|
||||
if (retval > 0)
|
||||
retval = 0;
|
||||
|
||||
return -retval;
|
||||
return retval;
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[], char *envp[])
|
||||
|
|
|
|||
16
udev_lib.c
16
udev_lib.c
|
|
@ -81,6 +81,22 @@ char *get_subsystem(char *subsystem)
|
|||
return subsystem;
|
||||
}
|
||||
|
||||
char get_device_type(const char *path, const char *subsystem)
|
||||
{
|
||||
if (strcmp(subsystem, "block") == 0 ||
|
||||
strstr(path, "/block/") != NULL)
|
||||
return 'b';
|
||||
|
||||
if (strcmp(subsystem, "net") == 0 ||
|
||||
strstr(path, "/class/net/") != NULL)
|
||||
return 'n';
|
||||
|
||||
if (strstr(path, "/class/") != NULL)
|
||||
return 'c';
|
||||
|
||||
return '\0';
|
||||
}
|
||||
|
||||
int file_map(const char *filename, char **buf, size_t *bufsize)
|
||||
{
|
||||
struct stat stats;
|
||||
|
|
|
|||
|
|
@ -71,6 +71,7 @@ extern char *get_devpath(void);
|
|||
extern char *get_devnode(void);
|
||||
extern char *get_seqnum(void);
|
||||
extern char *get_subsystem(char *subsystem);
|
||||
extern char get_device_type(const char *path, const char *subsystem);
|
||||
extern int file_map(const char *filename, char **buf, size_t *bufsize);
|
||||
extern void file_unmap(char *buf, size_t bufsize);
|
||||
extern size_t buf_get_line(char *buf, size_t buflen, size_t cur);
|
||||
|
|
|
|||
24
udevinfo.c
24
udevinfo.c
|
|
@ -138,6 +138,10 @@ static int print_device_chain(const char *path)
|
|||
struct sysfs_device *sysfs_dev;
|
||||
struct sysfs_device *sysfs_dev_parent;
|
||||
int retval = 0;
|
||||
char type;
|
||||
|
||||
type = get_device_type(path, "");
|
||||
dbg("device type is %c", type);
|
||||
|
||||
/* get the class dev */
|
||||
class_dev = sysfs_open_class_device_path(path);
|
||||
|
|
@ -146,21 +150,23 @@ static int print_device_chain(const char *path)
|
|||
return -1;
|
||||
}
|
||||
|
||||
/* read the 'dev' file for major/minor*/
|
||||
attr = sysfs_get_classdev_attr(class_dev, "dev");
|
||||
if (attr == NULL) {
|
||||
printf("couldn't get the \"dev\" file\n");
|
||||
retval = -1;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
printf("\nudevinfo starts with the device the node belongs to and then walks up the\n"
|
||||
"device chain, to print for every device found, all possibly useful attributes\n"
|
||||
"in the udev key format.\n"
|
||||
"Only attributes within one device section may be used together in one rule,\n"
|
||||
"to match the device for which the node will be created.\n"
|
||||
"\n");
|
||||
printf("device '%s' has major:minor %s", class_dev->path, attr->value);
|
||||
|
||||
if (type == 'b' || type =='c') {
|
||||
/* read the 'dev' file for major/minor*/
|
||||
attr = sysfs_get_classdev_attr(class_dev, "dev");
|
||||
if (attr == NULL) {
|
||||
printf("couldn't get the \"dev\" file\n");
|
||||
retval = -1;
|
||||
goto exit;
|
||||
}
|
||||
printf("device '%s' has major:minor %s", class_dev->path, attr->value);
|
||||
}
|
||||
|
||||
/* open sysfs class device directory and print all attributes */
|
||||
printf(" looking at class device '%s':\n", class_dev->path);
|
||||
|
|
|
|||
Loading…
Reference in a new issue