[PATCH] allow setting mtu and txqlen via RTM_SETLINK and provide txqlen via RTM_GETLINK

[Thomas Graf <tgraf@xxxxxxx>]

Hello

Introduces a new rtnetlink link message attribute to provide txqlen value
via RTM_GETLINK and adds support for setting MTU and txqlen via RTM_SETLINK.

First step to supersede ioctl network link configuration with
rtnetlink equivalent.

    Thomas


--- 1.19/net/core/rtnetlink.c   Thu Apr 29 01:04:48 2004
+++ 1.20/net/core/rtnetlink.c   Sun Aug 22 18:11:03 2004
@@ -175,6 +175,7 @@
                r->ifi_flags |= IFF_RUNNING;
 
        RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
+       RTA_PUT(skb, IFLA_TXQLEN, sizeof(unsigned long), &dev->tx_queue_len);
        if (dev->addr_len) {
                RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
                RTA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
@@ -268,6 +269,23 @@
                        goto out;
                memcpy(dev->broadcast, RTA_DATA(ida[IFLA_BROADCAST - 1]),
                       dev->addr_len);
+       }
+
+       if (ida[IFLA_MTU - 1]) {
+               if (ida[IFLA_MTU - 1]->rta_len != RTA_LENGTH(sizeof(unsigned)))
+                       goto out;
+               err = dev_set_mtu(dev, *((unsigned *) RTA_DATA(ida[IFLA_MTU - 
1])));
+
+               if (err)
+                       goto out;
+
+       }
+
+       if (ida[IFLA_TXQLEN - 1]) {
+               if (ida[IFLA_TXQLEN - 1]->rta_len != RTA_LENGTH(sizeof(unsigned 
long)))
+                       goto out;
+
+               dev->tx_queue_len = *((unsigned long *) 
RTA_DATA(ida[IFLA_TXQLEN - 1]));
        }
 
        err = 0;

--- 1.33/include/linux/rtnetlink.h      Mon Apr  5 23:41:40 2004
+++ 1.34/include/linux/rtnetlink.h      Sun Aug 22 18:11:03 2004
@@ -540,6 +540,7 @@
        IFLA_QDISC,
        IFLA_STATS,
        IFLA_COST,
+       IFLA_TXQLEN,
 #define IFLA_COST IFLA_COST
        IFLA_PRIORITY,
 #define IFLA_PRIORITY IFLA_PRIORITY