[ATM]: add support for LECS addresses learned from network

From: Eric Kinzie <ekinzie@cmf.nrl.navy.mil>
Signed-off-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 60 insertions, 23 deletions

diff --git a/net/atm/addr.c b/net/atm/addr.c
index a30d0bf..3060fd0 100644
--- a/net/atm/addr.c
+++ b/net/atm/addr.c
@@ -44,31 +44,43 @@ static void notify_sigd(struct atm_dev *dev)
 	sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL);
 }
 
-void atm_reset_addr(struct atm_dev *dev)
+void atm_reset_addr(struct atm_dev *dev, enum atm_addr_type_t atype)
 {
 	unsigned long flags;
 	struct atm_dev_addr *this, *p;
+	struct list_head *head;
 
 	spin_lock_irqsave(&dev->lock, flags);
-	list_for_each_entry_safe(this, p, &dev->local, entry) {
+	if (atype == ATM_ADDR_LECS)
+		head = &dev->lecs;
+	else
+		head = &dev->local;
+	list_for_each_entry_safe(this, p, head, entry) {
 		list_del(&this->entry);
 		kfree(this);
 	}
 	spin_unlock_irqrestore(&dev->lock, flags);
-	notify_sigd(dev);
+	if (head == &dev->local)
+		notify_sigd(dev);
 }
 
-int atm_add_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
+int atm_add_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr,
+		 enum atm_addr_type_t atype)
 {
 	unsigned long flags;
 	struct atm_dev_addr *this;
+	struct list_head *head;
 	int error;
 
 	error = check_addr(addr);
 	if (error)
 		return error;
 	spin_lock_irqsave(&dev->lock, flags);
-	list_for_each_entry(this, &dev->local, entry) {
+	if (atype == ATM_ADDR_LECS)
+		head = &dev->lecs;
+	else
+		head = &dev->local;
+	list_for_each_entry(this, head, entry) {
 		if (identical(&this->addr, addr)) {
 			spin_unlock_irqrestore(&dev->lock, flags);
 			return -EEXIST;
@@ -80,28 +92,36 @@ int atm_add_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
 		return -ENOMEM;
 	}
 	this->addr = *addr;
-	list_add(&this->entry, &dev->local);
+	list_add(&this->entry, head);
 	spin_unlock_irqrestore(&dev->lock, flags);
-	notify_sigd(dev);
+	if (head == &dev->local)
+		notify_sigd(dev);
 	return 0;
 }
 
-int atm_del_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
+int atm_del_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr,
+		 enum atm_addr_type_t atype)
 {
 	unsigned long flags;
 	struct atm_dev_addr *this;
+	struct list_head *head;
 	int error;
 
 	error = check_addr(addr);
 	if (error)
 		return error;
 	spin_lock_irqsave(&dev->lock, flags);
-	list_for_each_entry(this, &dev->local, entry) {
+	if (atype == ATM_ADDR_LECS)
+		head = &dev->lecs;
+	else
+		head = &dev->local;
+	list_for_each_entry(this, head, entry) {
 		if (identical(&this->addr, addr)) {
 			list_del(&this->entry);
 			spin_unlock_irqrestore(&dev->lock, flags);
 			kfree(this);
-			notify_sigd(dev);
+			if (head == &dev->local)
+				notify_sigd(dev);
 			return 0;
 		}
 	}
@@ -110,22 +130,27 @@ int atm_del_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
 }
 
 int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf,
-		 size_t size)
+		 size_t size, enum atm_addr_type_t atype)
 {
 	unsigned long flags;
 	struct atm_dev_addr *this;
+	struct list_head *head;
 	int total = 0, error;
 	struct sockaddr_atmsvc *tmp_buf, *tmp_bufp;
 
 	spin_lock_irqsave(&dev->lock, flags);
-	list_for_each_entry(this, &dev->local, entry)
+	if (atype == ATM_ADDR_LECS)
+		head = &dev->lecs;
+	else
+		head = &dev->local;
+	list_for_each_entry(this, head, entry)
 	    total += sizeof(struct sockaddr_atmsvc);
 	tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC);
 	if (!tmp_buf) {
 		spin_unlock_irqrestore(&dev->lock, flags);
 		return -ENOMEM;
 	}
-	list_for_each_entry(this, &dev->local, entry)
+	list_for_each_entry(this, head, entry)
 	    memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc));
 	spin_unlock_irqrestore(&dev->lock, flags);
 	error = total > size ? -E2BIG : total;
diff --git a/net/atm/addr.h b/net/atm/addr.h
index 3099d21..f39433a 100644
--- a/net/atm/addr.h
+++ b/net/atm/addr.h
@@ -9,10 +9,12 @@
 #include <linux/atm.h>
 #include <linux/atmdev.h>
 
-
-void atm_reset_addr(struct atm_dev *dev);
-int atm_add_addr(struct atm_dev *dev,struct sockaddr_atmsvc *addr);
-int atm_del_addr(struct atm_dev *dev,struct sockaddr_atmsvc *addr);
-int atm_get_addr(struct atm_dev *dev,struct sockaddr_atmsvc __user *buf,size_t size);
+void atm_reset_addr(struct atm_dev *dev, enum atm_addr_type_t type);
+int atm_add_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr,
+		 enum atm_addr_type_t type);
+int atm_del_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr,
+		 enum atm_addr_type_t type);
+int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user *buf,
+		 size_t size, enum atm_addr_type_t type);
 
 #endif
diff --git a/net/atm/resources.c b/net/atm/resources.c
index a57a926..415d261 100644
--- a/net/atm/resources.c
+++ b/net/atm/resources.c
@@ -40,6 +40,7 @@ static struct atm_dev *__alloc_atm_dev(const char *type)
 	dev->link_rate = ATM_OC3_PCR;
 	spin_lock_init(&dev->lock);
 	INIT_LIST_HEAD(&dev->local);
+	INIT_LIST_HEAD(&dev->lecs);
 
 	return dev;
 }
@@ -320,10 +321,12 @@ int atm_dev_ioctl(unsigned int cmd, void __user *arg)
 				error = -EPERM;
 				goto done;
 			}
-			atm_reset_addr(dev);
+			atm_reset_addr(dev, ATM_ADDR_LOCAL);
 			break;
 		case ATM_ADDADDR:
 		case ATM_DELADDR:
+		case ATM_ADDLECSADDR:
+		case ATM_DELLECSADDR:
 			if (!capable(CAP_NET_ADMIN)) {
 				error = -EPERM;
 				goto done;
@@ -335,14 +338,21 @@ int atm_dev_ioctl(unsigned int cmd, void __user *arg)
 					error = -EFAULT;
 					goto done;
 				}
-				if (cmd == ATM_ADDADDR)
-					error = atm_add_addr(dev, &addr);
+				if (cmd == ATM_ADDADDR || cmd == ATM_ADDLECSADDR)
+					error = atm_add_addr(dev, &addr,
+							     (cmd == ATM_ADDADDR ?
+							      ATM_ADDR_LOCAL : ATM_ADDR_LECS));
 				else
-					error = atm_del_addr(dev, &addr);
+					error = atm_del_addr(dev, &addr,
+							     (cmd == ATM_DELADDR ?
+							      ATM_ADDR_LOCAL : ATM_ADDR_LECS));
 				goto done;
 			}
 		case ATM_GETADDR:
-			error = atm_get_addr(dev, buf, len);
+		case ATM_GETLECSADDR:
+			error = atm_get_addr(dev, buf, len,
+					     (cmd == ATM_GETADDR ?
+					      ATM_ADDR_LOCAL : ATM_ADDR_LECS));
 			if (error < 0)
 				goto done;
 			size = error;