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Commit b10aeeef authored by Jeff Dike's avatar Jeff Dike Committed by Linus Torvalds
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[PATCH] uml: mechanical tidying after random MACs change 



Mechanical, hopefully non-functional changes stemming from
setup_etheraddr always succeeding now that it always assigns a MAC,
either from the command line or generated randomly:
   the test of the return of setup_etheraddr is removed, and code
dependent on it succeeding is now unconditional
   setup_etheraddr can now be made void
   struct uml_net.have_mac is now always 1, so tests of it can be
similarly removed, and uses of it can be replaced with 1
   struct uml_net.have_mac is no longer used, so it can be removed
   struct uml_net_private.have_mac is copied from struct uml_net, so
it is always 1
   tests of uml_net_private.have_mac can be removed
   uml_net_private.have_mac can now be removed
   the only call to dev_ip_addr was removed, so it can be deleted

It also turns out that setup_etheraddr is called only once, from the same
file, so it can be static and its declaration removed from net_kern.h.

Similarly, set_ether_mac is defined and called only from one file.

Finally, setup_etheraddr and set_ether_mac were moved to avoid needing forward
declarations.

Signed-off-by: default avatarJeff Dike <jdike@addtoit.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent f3e7ed2b

arch/um/drivers/net_kern.c

+40 −65
Original line number Diff line number Diff line
@@ -119,11 +119,6 @@ static int uml_net_open(struct net_device *dev) 
		goto out;

	}



	if(!lp->have_mac){

 		dev_ip_addr(dev, &lp->mac[2]);

 		set_ether_mac(dev, lp->mac);

	}



	lp->fd = (*lp->open)(&lp->user);

	if(lp->fd < 0){

		err = lp->fd;
@@ -287,6 +282,39 @@ void uml_net_user_timer_expire(unsigned long _conn) 
#endif

}



static void setup_etheraddr(char *str, unsigned char *addr)

{

	char *end;

	int i;



	if(str == NULL)

		goto random;



	for(i=0;i<6;i++){

		addr[i] = simple_strtoul(str, &end, 16);

		if((end == str) ||

		   ((*end != ':') && (*end != ',') && (*end != '\0'))){

			printk(KERN_ERR

			       "setup_etheraddr: failed to parse '%s' "

			       "as an ethernet address\n", str);

			goto random;

		}

		str = end + 1;

	}

	if(addr[0] & 1){

		printk(KERN_ERR

		       "Attempt to assign a broadcast ethernet address to a "

		       "device disallowed\n");

		goto random;

	}

	return;



random:

	addr[0] = 0xfe;

	addr[1] = 0xfd;

	random_mac(addr);

}



static DEFINE_SPINLOCK(devices_lock);

static LIST_HEAD(devices);
@@ -322,11 +350,9 @@ static int eth_configure(int n, void *init, char *mac, 
	list_add(&device->list, &devices);

	spin_unlock(&devices_lock);



	if (setup_etheraddr(mac, device->mac))

		device->have_mac = 1;

	setup_etheraddr(mac, device->mac);



	printk(KERN_INFO "Netdevice %d ", n);

	if (device->have_mac)

	printk("(%02x:%02x:%02x:%02x:%02x:%02x) ",

	       device->mac[0], device->mac[1],

	       device->mac[2], device->mac[3],
@@ -396,7 +422,6 @@ static int eth_configure(int n, void *init, char *mac, 
		  .dev 			= dev,

		  .fd 			= -1,

		  .mac 			= { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0},

		  .have_mac 		= device->have_mac,

		  .protocol 		= transport->kern->protocol,

		  .open 		= transport->user->open,

		  .close 		= transport->user->close,
@@ -411,13 +436,11 @@ static int eth_configure(int n, void *init, char *mac, 
	init_timer(&lp->tl);

	spin_lock_init(&lp->lock);

	lp->tl.function = uml_net_user_timer_expire;

	if (lp->have_mac)

	memcpy(lp->mac, device->mac, sizeof(lp->mac));



	if (transport->user->init) 

		(*transport->user->init)(&lp->user, dev);



	if (device->have_mac)

	set_ether_mac(dev, device->mac);



	return 0;
@@ -747,54 +770,6 @@ static void close_devices(void) 


__uml_exitcall(close_devices);



int setup_etheraddr(char *str, unsigned char *addr)

{

	char *end;

	int i;



	if(str == NULL)

		goto random;



	for(i=0;i<6;i++){

		addr[i] = simple_strtoul(str, &end, 16);

		if((end == str) ||

		   ((*end != ':') && (*end != ',') && (*end != '\0'))){

			printk(KERN_ERR 

			       "setup_etheraddr: failed to parse '%s' "

			       "as an ethernet address\n", str);

			goto random;

		}

		str = end + 1;

	}

	if(addr[0] & 1){

		printk(KERN_ERR 

		       "Attempt to assign a broadcast ethernet address to a "

		       "device disallowed\n");

		goto random;

	}

	return 1;



random:

	addr[0] = 0xfe;

	addr[1] = 0xfd;

	random_mac(addr);

	return 1;

}



void dev_ip_addr(void *d, unsigned char *bin_buf)

{

	struct net_device *dev = d;

	struct in_device *ip = dev->ip_ptr;

	struct in_ifaddr *in;



	if((ip == NULL) || ((in = ip->ifa_list) == NULL)){

		printk(KERN_WARNING "dev_ip_addr - device not assigned an "

		       "IP address\n");

		return;

	}

	memcpy(bin_buf, &in->ifa_address, sizeof(in->ifa_address));

}



struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra)

{

	if((skb != NULL) && (skb_tailroom(skb) < extra)){

arch/um/include/net_kern.h

+0 −14
Original line number Diff line number Diff line
@@ -18,7 +18,6 @@ struct uml_net { 
	struct platform_device pdev;

	int index;

	unsigned char mac[ETH_ALEN];

	int have_mac;

};



struct uml_net_private {
@@ -29,7 +28,6 @@ struct uml_net_private { 
	struct net_device_stats stats;

	int fd;

	unsigned char mac[ETH_ALEN];

	int have_mac;

	unsigned short (*protocol)(struct sk_buff *);

	int (*open)(void *);

	void (*close)(int, void *);
@@ -62,7 +60,6 @@ struct transport { 


extern struct net_device *ether_init(int);

extern unsigned short ether_protocol(struct sk_buff *);

extern int setup_etheraddr(char *str, unsigned char *addr);

extern struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra);

extern int tap_setup_common(char *str, char *type, char **dev_name, 

			    char **mac_out, char **gate_addr);
@@ -70,14 +67,3 @@ extern void register_transport(struct transport *new); 
extern unsigned short eth_protocol(struct sk_buff *skb);



#endif
 


/*

 * Overrides for Emacs so that we follow Linus's tabbing style.

 * Emacs will notice this stuff at the end of the file and automatically

 * adjust the settings for this buffer only.  This must remain at the end

 * of the file.

 * ---------------------------------------------------------------------------

 * Local variables:

 * c-file-style: "linux"

 * End:

 */

arch/um/include/net_user.h

+0 −1
Original line number Diff line number Diff line
@@ -25,7 +25,6 @@ struct net_user_info { 
};



extern void ether_user_init(void *data, void *dev);

extern void dev_ip_addr(void *d, unsigned char *bin_buf);

extern void iter_addresses(void *d, void (*cb)(unsigned char *,

					       unsigned char *, void *),

			   void *arg);