Attachment 305385 Details for Bug 446456 – Patch to accomplish RFE

[patch] Patch to accomplish RFE

add-clear-stats-proc-net-dev.patch (text/plain), 2.39 KB, created by James Cammarata on 2008-05-14 17:12:39 UTC

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Creator: James Cammarata

Created: 2008-05-14 17:12:39 UTC

Size: 2.39 KB

patch

obsolete

>--- linux-2.6.9/net/core/dev.c  2004-10-18 17:54:08.000000000 -0400
>+++ linux-2.6.9-jcammara/net/core/dev.c 2008-05-14 12:45:35.000000000 -0400
>@@ -2146,6 +2146,58 @@ static int softnet_seq_show(struct seq_f
>        return 0;
> }
>
>+static ssize_t proc_net_dev_write(struct file *file, const char __user *buf, size_t length, loff_t *ppos)
>+{
>+        char *buffer, *p;
>+        char devname[IFNAMSIZ];
>+        struct net_device *dev;
>+        int err;
>+
>+        if (!buf || length > PAGE_SIZE)
>+                return -EINVAL;
>+
>+        buffer = (char *)__get_free_page(GFP_KERNEL);
>+        if (!buffer)
>+                return -ENOMEM;
>+
>+        err = -EFAULT;
>+        if (copy_from_user(buffer, buf, length))
>+                goto out;
>+
>+        err = -EINVAL;
>+        if (length < PAGE_SIZE)
>+                buffer[length] = '\0';
>+        else if (buffer[PAGE_SIZE-1])
>+                goto out;
>+
>+        /*
>+         * Usage: echo "net clear-stats ifdev" >/proc/net/dev
>+         * with  "ifdev" replaced by the device name you wish to clear.
>+         */
>+        if (!strncmp("net clear-stats",buffer,15)) {
>+                p = buffer + 16;
>+                sscanf(p,"%s",devname);
>+                printk(KERN_INFO "net clearing stats - device is: %s\n", devname);
>+                dev = dev_get_by_name(devname);
>+                if (!dev) {
>+                   printk(KERN_INFO "no interface named '%s'\n", devname);
>+                } else {
>+                        if (dev->get_stats) {
>+                                struct net_device_stats *stats = dev->get_stats(dev);
>+                                memset(stats,0,sizeof(struct net_device_stats));
>+                                printk(KERN_INFO "stats cleared for interface %s\n", devname);
>+                        } else {
>+                                printk(KERN_INFO "%s has no stats to clear\n", devname);
>+                        }
>+                        dev_put(dev);
>+                }
>+        }
>+
>+ out:
>+        free_page((unsigned long)buffer);
>+        return err;
>+}
>+
> static struct seq_operations dev_seq_ops = {
>        .start = dev_seq_start,
>        .next  = dev_seq_next,
>@@ -2162,6 +2214,7 @@ static struct file_operations dev_seq_fo
>        .owner   = THIS_MODULE,
>        .open    = dev_seq_open,
>        .read    = seq_read,
>+        .write   = proc_net_dev_write,
>        .llseek  = seq_lseek,
>        .release = seq_release,
> };
>

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Attachments on bug 446456: 305385 | 305503