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[ATM]: add support for LECS addresses learned from network
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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>
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Eric Kinzie authored and David S. Miller committed Oct 7, 2005
1 parent 20c9c82 commit 0f21ba7
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Showing 4 changed files with 70 additions and 23 deletions.
10 changes: 10 additions & 0 deletions include/linux/atmdev.h
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Original file line number Diff line number Diff line change
Expand Up @@ -76,6 +76,13 @@ struct atm_dev_stats {
/* set interface ESI */
#define ATM_SETESIF _IOW('a',ATMIOC_ITF+13,struct atmif_sioc)
/* force interface ESI */
#define ATM_ADDLECSADDR _IOW('a', ATMIOC_ITF+14, struct atmif_sioc)
/* register a LECS address */
#define ATM_DELLECSADDR _IOW('a', ATMIOC_ITF+15, struct atmif_sioc)
/* unregister a LECS address */
#define ATM_GETLECSADDR _IOW('a', ATMIOC_ITF+16, struct atmif_sioc)
/* retrieve LECS address(es) */

#define ATM_GETSTAT _IOW('a',ATMIOC_SARCOM+0,struct atmif_sioc)
/* get AAL layer statistics */
#define ATM_GETSTATZ _IOW('a',ATMIOC_SARCOM+1,struct atmif_sioc)
Expand Down Expand Up @@ -328,6 +335,8 @@ struct atm_dev_addr {
struct list_head entry; /* next address */
};

enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS };

struct atm_dev {
const struct atmdev_ops *ops; /* device operations; NULL if unused */
const struct atmphy_ops *phy; /* PHY operations, may be undefined */
Expand All @@ -338,6 +347,7 @@ struct atm_dev {
void *phy_data; /* private PHY date */
unsigned long flags; /* device flags (ATM_DF_*) */
struct list_head local; /* local ATM addresses */
struct list_head lecs; /* LECS ATM addresses learned via ILMI */
unsigned char esi[ESI_LEN]; /* ESI ("MAC" addr) */
struct atm_cirange ci_range; /* VPI/VCI range */
struct k_atm_dev_stats stats; /* statistics */
Expand Down
51 changes: 38 additions & 13 deletions net/atm/addr.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand All @@ -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;
}
}
Expand All @@ -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;
Expand Down
12 changes: 7 additions & 5 deletions net/atm/addr.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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
20 changes: 15 additions & 5 deletions net/atm/resources.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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;
}
Expand Down Expand Up @@ -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;
Expand All @@ -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;
Expand Down

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