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authorkay.sievers@vrfy.org <kay.sievers@vrfy.org>2004-03-24 23:19:39 -0800
committerGreg KH <gregkh@suse.de>2005-04-26 21:35:12 -0700
commitf61d732a02c8a5e11c39651a70e3e3fd00529495 (patch)
treec0d5c08372c1efcb4e668075c796e5b6aa5edb65 /udevinfo.c
parent3e33961b4557f9b709c901b4aa77dfe0220222bd (diff)
[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 :)
Diffstat (limited to 'udevinfo.c')
-rw-r--r--udevinfo.c24
1 files changed, 15 insertions, 9 deletions
diff --git a/udevinfo.c b/udevinfo.c
index 800882eb1a..b23f9d0aef 100644
--- a/udevinfo.c
+++ b/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);