Re: Kernelnewbies Digest, Vol 79, Issue 18

2017-06-21 Thread wiktoria.lewicka
Thank you all, I make some changes in my code, but its still not work. When my 
module is loading and loading I have a problems with connection with Internet- 
is it a matter of configuration?
My changes:

#include 
#include 
#include 
#include 
#include 
#define DEV_NAME "my_dev\n"

struct net_device my_netdev;

int init_mdev(struct net_device *dev);

struct net_device_ops nops = {
  .ndo_init = init_mdev,
  /*.ndo_uninit = unin_mdev,*/
};

static int __init init_dev(void)
{
  /*my_netdev.netdev_ops = &nops;*/
  int result;
  if(!(netdev_boot_setup_check(&my_netdev))){
printk(KERN_ERR "NETDEV: setup error");
return 0;
  }
  strcpy(my_netdev.name, DEV_NAME);
  if((result = register_netdev(&my_netdev)))
printk(KERN_ERR "NETDEV: Error registering device");
  printk("NETDEV: Device registered successfully");
  return 0;
}

static void __exit remove_dev(void)
{
  unregister_netdev(&my_netdev);
}
int init_mdev(struct net_device *dev)
{
  printk("INIT");
  return 0;
}
module_init(init_dev);
module_exit(remove_dev);


W dniu 2017-06-20 18:00:02 użytkownik  
 napisał:
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> Today's Topics:
> 
>1. My network device don't work (wiktoria.lewicka)
>2. Re: My network device don't work (Stan Drozd)
>3. Re: My network device don't work (Greg KH)
> 
> 
> --
> 
> Message: 1
> Date: Tue, 20 Jun 2017 14:32:31 +0200
> From: "wiktoria.lewicka" 
> Subject: My network device don't work
> To: "kernelnewbies@kernelnewbies.org"
>   
> Message-ID:
>   <186270325-26e3212af6540c227a34d3cd3b5e0...@pmq3v.m5r2.onet>
> Content-Type: text/plain; charset="utf-8"
> 
> Hello.
> I write simple network device, but its don't work. Module is loading, 
> loading, loading...
> Code:
> 
> #include 
> #include 
> #include 
> #include 
> #include 
> #define DEV_NAME "chwdp"
> 
> struct net_device my_netdev;
> 
> int init_my_net_dev(struct net_device *dev);
> 
> struct net_device_ops nops = {
>   .ndo_init = init_my_net_dev,
>   //.ndo_uninit = uninit_my_net_dev,
> };
> 
> static int __init init_dev(void)
> {
>   //my_netdev.netdev_ops = &nops;
>   int result;
>   if((netdev_boot_setup_check(&my_netdev))){
> printk(KERN_ERR "NETDEV: setup error");
> return 0;
>   }
>   strncpy(my_netdev.name, DEV_NAME, 5);
>   if((result = register_netdev(&my_netdev)))
> printk(KERN_ERR "NETDEV: Error registering device");
>   printk("NETDEV: Device registered successfully");
>   return 0;
> }
> 
> static void __exit remove_dev(void)
> {
>   unregister_netdev(&my_netdev);
> }
> int init_my_net_dev(struct net_device *dev)
> {
>   printk("INIT");
>   return 0;
> }
> module_init(init_dev);
> module_exit(remove_dev);
> 
> 
> 
> 
> --
> 
> Message: 2
> Date: Tue, 20 Jun 2017 15:31:29 +0200
> From: Stan Drozd 
> Subject: Re: My network device don't work
> To: "wiktoria.lewicka" 
> Cc: kernelnewbies@kernelnewbies.org
> Message-ID: <20170620133128.gb1...@gmail.com>
> Content-Type: text/plain; charset=us-ascii
> 
> On Tue, Jun 20, 2017 at 02:32:31PM +0200, wiktoria.lewicka wrote:
> > Hello.
> > I write simple network device, but its don't work. Module is loading, 
> > loading, loading...
> > Code:
> > [...]
> Hello,
> "strncpy(my_netdev.name, DEV_NAME, 5)" only copies the 5 chars in "chwdp" 
> without the null byte. You could bump it to 6
> or maybe change 5 to IFNAMSIZ (the net_device.name's size) and then change 
> the last byte to '\0' manually
> 
> 
> 
> --
> 
> Message: 3
> Date: Tue, 20 Jun 2017 22:12:34 +0800
> From: Greg KH 
> Subject: Re: My network device don't work
> To: "wiktoria.lewicka" 
> Cc: "kernelnewbies@kernelnewbies.org"
>   
> Message-ID: <20170620141234.ga2

My network device don't work

2017-06-20 Thread wiktoria.lewicka
Hello.
I write simple network device, but its don't work. Module is loading, loading, 
loading...
Code:

#include 
#include 
#include 
#include 
#include 
#define DEV_NAME "chwdp"

struct net_device my_netdev;

int init_my_net_dev(struct net_device *dev);

struct net_device_ops nops = {
  .ndo_init = init_my_net_dev,
  //.ndo_uninit = uninit_my_net_dev,
};

static int __init init_dev(void)
{
  //my_netdev.netdev_ops = &nops;
  int result;
  if((netdev_boot_setup_check(&my_netdev))){
printk(KERN_ERR "NETDEV: setup error");
return 0;
  }
  strncpy(my_netdev.name, DEV_NAME, 5);
  if((result = register_netdev(&my_netdev)))
printk(KERN_ERR "NETDEV: Error registering device");
  printk("NETDEV: Device registered successfully");
  return 0;
}

static void __exit remove_dev(void)
{
  unregister_netdev(&my_netdev);
}
int init_my_net_dev(struct net_device *dev)
{
  printk("INIT");
  return 0;
}
module_init(init_dev);
module_exit(remove_dev);


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Struct sk_buff_head

2017-06-07 Thread wiktoria.lewicka
Hello!
I read code from file include/linux/skbuff.h and I have question about 
sk_buff_head structure. This structure is pointing to next and prev sk_buff 
structure on list. But I found the same pointers in first field structure 
sk_buff- it is union, which has pointers to next and prev sk_buff structures on 
list. Is this union replace sk_buff_head structure? I didn`t found any field in 
sk_buff, which may use sk_buff_head, but I found some functions which uses this 
structure. 

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