/* net/atm/resources.c - Staticly allocated resources */
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/* net/atm/resources.c - Staticly allocated resources */
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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#include <linux/config.h>
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#include <linux/config.h>
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#include <linux/ctype.h>
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#include <linux/ctype.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/atmdev.h>
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#include <linux/atmdev.h>
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#include <linux/sonet.h>
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#include <linux/sonet.h>
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#include <linux/kernel.h> /* for barrier */
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#include <linux/kernel.h> /* for barrier */
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/bitops.h>
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#include <linux/bitops.h>
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#include <net/sock.h> /* for struct sock */
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#include <net/sock.h> /* for struct sock */
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#include <asm/segment.h> /* for get_fs_long and put_fs_long */
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#include <asm/segment.h> /* for get_fs_long and put_fs_long */
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#include "common.h"
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#include "common.h"
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#include "resources.h"
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#include "resources.h"
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#include "addr.h"
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#include "addr.h"
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LIST_HEAD(atm_devs);
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LIST_HEAD(atm_devs);
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spinlock_t atm_dev_lock = SPIN_LOCK_UNLOCKED;
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spinlock_t atm_dev_lock = SPIN_LOCK_UNLOCKED;
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static struct atm_dev *__alloc_atm_dev(const char *type)
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static struct atm_dev *__alloc_atm_dev(const char *type)
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{
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{
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struct atm_dev *dev;
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struct atm_dev *dev;
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dev = kmalloc(sizeof(*dev), GFP_ATOMIC);
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dev = kmalloc(sizeof(*dev), GFP_ATOMIC);
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if (!dev)
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if (!dev)
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return NULL;
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return NULL;
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memset(dev, 0, sizeof(*dev));
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memset(dev, 0, sizeof(*dev));
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dev->type = type;
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dev->type = type;
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dev->signal = ATM_PHY_SIG_UNKNOWN;
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dev->signal = ATM_PHY_SIG_UNKNOWN;
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dev->link_rate = ATM_OC3_PCR;
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dev->link_rate = ATM_OC3_PCR;
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spin_lock_init(&dev->lock);
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spin_lock_init(&dev->lock);
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return dev;
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return dev;
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}
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}
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static void __free_atm_dev(struct atm_dev *dev)
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static void __free_atm_dev(struct atm_dev *dev)
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{
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{
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kfree(dev);
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kfree(dev);
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}
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}
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static struct atm_dev *__atm_dev_lookup(int number)
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static struct atm_dev *__atm_dev_lookup(int number)
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{
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{
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struct atm_dev *dev;
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struct atm_dev *dev;
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struct list_head *p;
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struct list_head *p;
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list_for_each(p, &atm_devs) {
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list_for_each(p, &atm_devs) {
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dev = list_entry(p, struct atm_dev, dev_list);
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dev = list_entry(p, struct atm_dev, dev_list);
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if ((dev->ops) && (dev->number == number)) {
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if ((dev->ops) && (dev->number == number)) {
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atm_dev_hold(dev);
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atm_dev_hold(dev);
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return dev;
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return dev;
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}
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}
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}
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}
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return NULL;
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return NULL;
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}
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}
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struct atm_dev *atm_dev_lookup(int number)
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struct atm_dev *atm_dev_lookup(int number)
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{
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{
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struct atm_dev *dev;
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struct atm_dev *dev;
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spin_lock(&atm_dev_lock);
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spin_lock(&atm_dev_lock);
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dev = __atm_dev_lookup(number);
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dev = __atm_dev_lookup(number);
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spin_unlock(&atm_dev_lock);
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spin_unlock(&atm_dev_lock);
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return dev;
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return dev;
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}
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}
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struct atm_dev *atm_dev_register(const char *type, const struct atmdev_ops *ops,
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struct atm_dev *atm_dev_register(const char *type, const struct atmdev_ops *ops,
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int number, atm_dev_flags_t *flags)
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int number, atm_dev_flags_t *flags)
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{
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{
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struct atm_dev *dev, *inuse;
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struct atm_dev *dev, *inuse;
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dev = __alloc_atm_dev(type);
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dev = __alloc_atm_dev(type);
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if (!dev) {
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if (!dev) {
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printk(KERN_ERR "atm_dev_register: no space for dev %s\n",
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printk(KERN_ERR "atm_dev_register: no space for dev %s\n",
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type);
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type);
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return NULL;
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return NULL;
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}
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}
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spin_lock(&atm_dev_lock);
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spin_lock(&atm_dev_lock);
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if (number != -1) {
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if (number != -1) {
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if ((inuse = __atm_dev_lookup(number))) {
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if ((inuse = __atm_dev_lookup(number))) {
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atm_dev_put(inuse);
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atm_dev_put(inuse);
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spin_unlock(&atm_dev_lock);
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spin_unlock(&atm_dev_lock);
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__free_atm_dev(dev);
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__free_atm_dev(dev);
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return NULL;
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return NULL;
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}
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}
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dev->number = number;
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dev->number = number;
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} else {
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} else {
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dev->number = 0;
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dev->number = 0;
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while ((inuse = __atm_dev_lookup(dev->number))) {
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while ((inuse = __atm_dev_lookup(dev->number))) {
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atm_dev_put(inuse);
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atm_dev_put(inuse);
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dev->number++;
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dev->number++;
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}
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}
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}
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}
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dev->ops = ops;
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dev->ops = ops;
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if (flags)
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if (flags)
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dev->flags = *flags;
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dev->flags = *flags;
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else
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else
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memset(&dev->flags, 0, sizeof(dev->flags));
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memset(&dev->flags, 0, sizeof(dev->flags));
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memset(&dev->stats, 0, sizeof(dev->stats));
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memset(&dev->stats, 0, sizeof(dev->stats));
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atomic_set(&dev->refcnt, 1);
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atomic_set(&dev->refcnt, 1);
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list_add_tail(&dev->dev_list, &atm_devs);
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list_add_tail(&dev->dev_list, &atm_devs);
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spin_unlock(&atm_dev_lock);
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spin_unlock(&atm_dev_lock);
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#ifdef CONFIG_PROC_FS
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#ifdef CONFIG_PROC_FS
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if (ops->proc_read) {
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if (ops->proc_read) {
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if (atm_proc_dev_register(dev) < 0) {
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if (atm_proc_dev_register(dev) < 0) {
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printk(KERN_ERR "atm_dev_register: "
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printk(KERN_ERR "atm_dev_register: "
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"atm_proc_dev_register failed for dev %s\n",
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"atm_proc_dev_register failed for dev %s\n",
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type);
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type);
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spin_lock(&atm_dev_lock);
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spin_lock(&atm_dev_lock);
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list_del(&dev->dev_list);
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list_del(&dev->dev_list);
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spin_unlock(&atm_dev_lock);
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spin_unlock(&atm_dev_lock);
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__free_atm_dev(dev);
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__free_atm_dev(dev);
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return NULL;
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return NULL;
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}
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}
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}
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}
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#endif
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#endif
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return dev;
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return dev;
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}
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}
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void atm_dev_deregister(struct atm_dev *dev)
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void atm_dev_deregister(struct atm_dev *dev)
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{
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{
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unsigned long warning_time;
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unsigned long warning_time;
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#ifdef CONFIG_PROC_FS
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#ifdef CONFIG_PROC_FS
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if (dev->ops->proc_read)
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if (dev->ops->proc_read)
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atm_proc_dev_deregister(dev);
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atm_proc_dev_deregister(dev);
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#endif
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#endif
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spin_lock(&atm_dev_lock);
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spin_lock(&atm_dev_lock);
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list_del(&dev->dev_list);
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list_del(&dev->dev_list);
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spin_unlock(&atm_dev_lock);
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spin_unlock(&atm_dev_lock);
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warning_time = jiffies;
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warning_time = jiffies;
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while (atomic_read(&dev->refcnt) != 1) {
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while (atomic_read(&dev->refcnt) != 1) {
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current->state = TASK_INTERRUPTIBLE;
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current->state = TASK_INTERRUPTIBLE;
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schedule_timeout(HZ / 4);
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schedule_timeout(HZ / 4);
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current->state = TASK_RUNNING;
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current->state = TASK_RUNNING;
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if ((jiffies - warning_time) > 10 * HZ) {
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if ((jiffies - warning_time) > 10 * HZ) {
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printk(KERN_EMERG "atm_dev_deregister: waiting for "
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printk(KERN_EMERG "atm_dev_deregister: waiting for "
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"dev %d to become free. Usage count = %d\n",
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"dev %d to become free. Usage count = %d\n",
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dev->number, atomic_read(&dev->refcnt));
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dev->number, atomic_read(&dev->refcnt));
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warning_time = jiffies;
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warning_time = jiffies;
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}
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}
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}
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}
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__free_atm_dev(dev);
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__free_atm_dev(dev);
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}
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}
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void shutdown_atm_dev(struct atm_dev *dev)
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void shutdown_atm_dev(struct atm_dev *dev)
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{
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{
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if (atomic_read(&dev->refcnt) > 1) {
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if (atomic_read(&dev->refcnt) > 1) {
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set_bit(ATM_DF_CLOSE, &dev->flags);
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set_bit(ATM_DF_CLOSE, &dev->flags);
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return;
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return;
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}
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}
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if (dev->ops->dev_close)
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if (dev->ops->dev_close)
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dev->ops->dev_close(dev);
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dev->ops->dev_close(dev);
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atm_dev_deregister(dev);
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atm_dev_deregister(dev);
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}
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}
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static void copy_aal_stats(struct k_atm_aal_stats *from,
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static void copy_aal_stats(struct k_atm_aal_stats *from,
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struct atm_aal_stats *to)
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struct atm_aal_stats *to)
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{
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{
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#define __HANDLE_ITEM(i) to->i = atomic_read(&from->i)
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#define __HANDLE_ITEM(i) to->i = atomic_read(&from->i)
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__AAL_STAT_ITEMS
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__AAL_STAT_ITEMS
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#undef __HANDLE_ITEM
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#undef __HANDLE_ITEM
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}
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}
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static void subtract_aal_stats(struct k_atm_aal_stats *from,
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static void subtract_aal_stats(struct k_atm_aal_stats *from,
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struct atm_aal_stats *to)
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struct atm_aal_stats *to)
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{
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{
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#define __HANDLE_ITEM(i) atomic_sub(to->i, &from->i)
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#define __HANDLE_ITEM(i) atomic_sub(to->i, &from->i)
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__AAL_STAT_ITEMS
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__AAL_STAT_ITEMS
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#undef __HANDLE_ITEM
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#undef __HANDLE_ITEM
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}
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}
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static int fetch_stats(struct atm_dev *dev, struct atm_dev_stats *arg, int zero)
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static int fetch_stats(struct atm_dev *dev, struct atm_dev_stats *arg, int zero)
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{
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{
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struct atm_dev_stats tmp;
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struct atm_dev_stats tmp;
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int error = 0;
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int error = 0;
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copy_aal_stats(&dev->stats.aal0, &tmp.aal0);
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copy_aal_stats(&dev->stats.aal0, &tmp.aal0);
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copy_aal_stats(&dev->stats.aal34, &tmp.aal34);
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copy_aal_stats(&dev->stats.aal34, &tmp.aal34);
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copy_aal_stats(&dev->stats.aal5, &tmp.aal5);
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copy_aal_stats(&dev->stats.aal5, &tmp.aal5);
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if (arg)
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if (arg)
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error = copy_to_user(arg, &tmp, sizeof(tmp));
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error = copy_to_user(arg, &tmp, sizeof(tmp));
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if (zero && !error) {
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if (zero && !error) {
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subtract_aal_stats(&dev->stats.aal0, &tmp.aal0);
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subtract_aal_stats(&dev->stats.aal0, &tmp.aal0);
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subtract_aal_stats(&dev->stats.aal34, &tmp.aal34);
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subtract_aal_stats(&dev->stats.aal34, &tmp.aal34);
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subtract_aal_stats(&dev->stats.aal5, &tmp.aal5);
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subtract_aal_stats(&dev->stats.aal5, &tmp.aal5);
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}
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}
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return error ? -EFAULT : 0;
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return error ? -EFAULT : 0;
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}
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}
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int atm_dev_ioctl(unsigned int cmd, unsigned long arg)
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int atm_dev_ioctl(unsigned int cmd, unsigned long arg)
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{
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{
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void *buf;
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void *buf;
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int error = 0, len, number, size = 0;
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int error = 0, len, number, size = 0;
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struct atm_dev *dev;
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struct atm_dev *dev;
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if (cmd == ATM_GETNAMES) {
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if (cmd == ATM_GETNAMES) {
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int *tmp_buf, *tmp_bufp;
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int *tmp_buf, *tmp_bufp;
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struct list_head *p;
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struct list_head *p;
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/*
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/*
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* ATM_GETNAMES is a special case: it doesn't require a
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* ATM_GETNAMES is a special case: it doesn't require a
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* device number argument
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* device number argument
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*/
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*/
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if (get_user(buf, &((struct atm_iobuf *) arg)->buffer))
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if (get_user(buf, &((struct atm_iobuf *) arg)->buffer))
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return -EFAULT;
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return -EFAULT;
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if (get_user(len, &((struct atm_iobuf *) arg)->length))
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if (get_user(len, &((struct atm_iobuf *) arg)->length))
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return -EFAULT;
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return -EFAULT;
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spin_lock(&atm_dev_lock);
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spin_lock(&atm_dev_lock);
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list_for_each(p, &atm_devs)
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list_for_each(p, &atm_devs)
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size += sizeof(int);
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size += sizeof(int);
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if (size > len) {
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if (size > len) {
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spin_unlock(&atm_dev_lock);
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spin_unlock(&atm_dev_lock);
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return -E2BIG;
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return -E2BIG;
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}
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}
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tmp_buf = tmp_bufp = kmalloc(size, GFP_ATOMIC);
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tmp_buf = tmp_bufp = kmalloc(size, GFP_ATOMIC);
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if (!tmp_buf) {
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if (!tmp_buf) {
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spin_unlock(&atm_dev_lock);
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spin_unlock(&atm_dev_lock);
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return -ENOMEM;
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return -ENOMEM;
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}
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}
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list_for_each(p, &atm_devs) {
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list_for_each(p, &atm_devs) {
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dev = list_entry(p, struct atm_dev, dev_list);
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dev = list_entry(p, struct atm_dev, dev_list);
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*tmp_bufp++ = dev->number;
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*tmp_bufp++ = dev->number;
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}
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}
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spin_unlock(&atm_dev_lock);
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spin_unlock(&atm_dev_lock);
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error = (copy_to_user(buf, tmp_buf, size) ||
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error = (copy_to_user(buf, tmp_buf, size) ||
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put_user(size, &((struct atm_iobuf *) arg)->length))
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put_user(size, &((struct atm_iobuf *) arg)->length))
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? -EFAULT : 0;
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? -EFAULT : 0;
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kfree(tmp_buf);
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kfree(tmp_buf);
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return error;
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return error;
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}
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}
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if (get_user(buf, &((struct atmif_sioc *) arg)->arg))
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if (get_user(buf, &((struct atmif_sioc *) arg)->arg))
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return -EFAULT;
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return -EFAULT;
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if (get_user(len, &((struct atmif_sioc *) arg)->length))
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if (get_user(len, &((struct atmif_sioc *) arg)->length))
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return -EFAULT;
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return -EFAULT;
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if (get_user(number, &((struct atmif_sioc *) arg)->number))
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if (get_user(number, &((struct atmif_sioc *) arg)->number))
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return -EFAULT;
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return -EFAULT;
|
|
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if (!(dev = atm_dev_lookup(number)))
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if (!(dev = atm_dev_lookup(number)))
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return -ENODEV;
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return -ENODEV;
|
|
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switch (cmd) {
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switch (cmd) {
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case ATM_GETTYPE:
|
case ATM_GETTYPE:
|
size = strlen(dev->type) + 1;
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size = strlen(dev->type) + 1;
|
if (copy_to_user(buf, dev->type, size)) {
|
if (copy_to_user(buf, dev->type, size)) {
|
error = -EFAULT;
|
error = -EFAULT;
|
goto done;
|
goto done;
|
}
|
}
|
break;
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break;
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case ATM_GETESI:
|
case ATM_GETESI:
|
size = ESI_LEN;
|
size = ESI_LEN;
|
if (copy_to_user(buf, dev->esi, size)) {
|
if (copy_to_user(buf, dev->esi, size)) {
|
error = -EFAULT;
|
error = -EFAULT;
|
goto done;
|
goto done;
|
}
|
}
|
break;
|
break;
|
case ATM_SETESI:
|
case ATM_SETESI:
|
{
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{
|
int i;
|
int i;
|
|
|
for (i = 0; i < ESI_LEN; i++)
|
for (i = 0; i < ESI_LEN; i++)
|
if (dev->esi[i]) {
|
if (dev->esi[i]) {
|
error = -EEXIST;
|
error = -EEXIST;
|
goto done;
|
goto done;
|
}
|
}
|
}
|
}
|
/* fall through */
|
/* fall through */
|
case ATM_SETESIF:
|
case ATM_SETESIF:
|
{
|
{
|
unsigned char esi[ESI_LEN];
|
unsigned char esi[ESI_LEN];
|
|
|
if (!capable(CAP_NET_ADMIN)) {
|
if (!capable(CAP_NET_ADMIN)) {
|
error = -EPERM;
|
error = -EPERM;
|
goto done;
|
goto done;
|
}
|
}
|
if (copy_from_user(esi, buf, ESI_LEN)) {
|
if (copy_from_user(esi, buf, ESI_LEN)) {
|
error = -EFAULT;
|
error = -EFAULT;
|
goto done;
|
goto done;
|
}
|
}
|
memcpy(dev->esi, esi, ESI_LEN);
|
memcpy(dev->esi, esi, ESI_LEN);
|
error = ESI_LEN;
|
error = ESI_LEN;
|
goto done;
|
goto done;
|
}
|
}
|
case ATM_GETSTATZ:
|
case ATM_GETSTATZ:
|
if (!capable(CAP_NET_ADMIN)) {
|
if (!capable(CAP_NET_ADMIN)) {
|
error = -EPERM;
|
error = -EPERM;
|
goto done;
|
goto done;
|
}
|
}
|
/* fall through */
|
/* fall through */
|
case ATM_GETSTAT:
|
case ATM_GETSTAT:
|
size = sizeof(struct atm_dev_stats);
|
size = sizeof(struct atm_dev_stats);
|
error = fetch_stats(dev, buf, cmd == ATM_GETSTATZ);
|
error = fetch_stats(dev, buf, cmd == ATM_GETSTATZ);
|
if (error)
|
if (error)
|
goto done;
|
goto done;
|
break;
|
break;
|
case ATM_GETCIRANGE:
|
case ATM_GETCIRANGE:
|
size = sizeof(struct atm_cirange);
|
size = sizeof(struct atm_cirange);
|
if (copy_to_user(buf, &dev->ci_range, size)) {
|
if (copy_to_user(buf, &dev->ci_range, size)) {
|
error = -EFAULT;
|
error = -EFAULT;
|
goto done;
|
goto done;
|
}
|
}
|
break;
|
break;
|
case ATM_GETLINKRATE:
|
case ATM_GETLINKRATE:
|
size = sizeof(int);
|
size = sizeof(int);
|
if (copy_to_user(buf, &dev->link_rate, size)) {
|
if (copy_to_user(buf, &dev->link_rate, size)) {
|
error = -EFAULT;
|
error = -EFAULT;
|
goto done;
|
goto done;
|
}
|
}
|
break;
|
break;
|
case ATM_RSTADDR:
|
case ATM_RSTADDR:
|
if (!capable(CAP_NET_ADMIN)) {
|
if (!capable(CAP_NET_ADMIN)) {
|
error = -EPERM;
|
error = -EPERM;
|
goto done;
|
goto done;
|
}
|
}
|
atm_reset_addr(dev);
|
atm_reset_addr(dev);
|
break;
|
break;
|
case ATM_ADDADDR:
|
case ATM_ADDADDR:
|
case ATM_DELADDR:
|
case ATM_DELADDR:
|
if (!capable(CAP_NET_ADMIN)) {
|
if (!capable(CAP_NET_ADMIN)) {
|
error = -EPERM;
|
error = -EPERM;
|
goto done;
|
goto done;
|
}
|
}
|
{
|
{
|
struct sockaddr_atmsvc addr;
|
struct sockaddr_atmsvc addr;
|
|
|
if (copy_from_user(&addr, buf, sizeof(addr))) {
|
if (copy_from_user(&addr, buf, sizeof(addr))) {
|
error = -EFAULT;
|
error = -EFAULT;
|
goto done;
|
goto done;
|
}
|
}
|
if (cmd == ATM_ADDADDR)
|
if (cmd == ATM_ADDADDR)
|
error = atm_add_addr(dev, &addr);
|
error = atm_add_addr(dev, &addr);
|
else
|
else
|
error = atm_del_addr(dev, &addr);
|
error = atm_del_addr(dev, &addr);
|
goto done;
|
goto done;
|
}
|
}
|
case ATM_GETADDR:
|
case ATM_GETADDR:
|
error = atm_get_addr(dev, buf, len);
|
error = atm_get_addr(dev, buf, len);
|
if (error < 0)
|
if (error < 0)
|
goto done;
|
goto done;
|
size = error;
|
size = error;
|
/* write back size even if it's zero */
|
/* write back size even if it's zero */
|
goto write_size;
|
goto write_size;
|
case ATM_SETLOOP:
|
case ATM_SETLOOP:
|
if (__ATM_LM_XTRMT((int) (long) buf) &&
|
if (__ATM_LM_XTRMT((int) (long) buf) &&
|
__ATM_LM_XTLOC((int) (long) buf) >
|
__ATM_LM_XTLOC((int) (long) buf) >
|
__ATM_LM_XTRMT((int) (long) buf)) {
|
__ATM_LM_XTRMT((int) (long) buf)) {
|
error = -EINVAL;
|
error = -EINVAL;
|
goto done;
|
goto done;
|
}
|
}
|
/* fall through */
|
/* fall through */
|
case ATM_SETCIRANGE:
|
case ATM_SETCIRANGE:
|
case SONET_GETSTATZ:
|
case SONET_GETSTATZ:
|
case SONET_SETDIAG:
|
case SONET_SETDIAG:
|
case SONET_CLRDIAG:
|
case SONET_CLRDIAG:
|
case SONET_SETFRAMING:
|
case SONET_SETFRAMING:
|
if (!capable(CAP_NET_ADMIN)) {
|
if (!capable(CAP_NET_ADMIN)) {
|
error = -EPERM;
|
error = -EPERM;
|
goto done;
|
goto done;
|
}
|
}
|
/* fall through */
|
/* fall through */
|
default:
|
default:
|
if (!dev->ops->ioctl) {
|
if (!dev->ops->ioctl) {
|
error = -EINVAL;
|
error = -EINVAL;
|
goto done;
|
goto done;
|
}
|
}
|
size = dev->ops->ioctl(dev, cmd, buf);
|
size = dev->ops->ioctl(dev, cmd, buf);
|
if (size < 0) {
|
if (size < 0) {
|
error = (size == -ENOIOCTLCMD ? -EINVAL : size);
|
error = (size == -ENOIOCTLCMD ? -EINVAL : size);
|
goto done;
|
goto done;
|
}
|
}
|
}
|
}
|
|
|
if (size) {
|
if (size) {
|
write_size:
|
write_size:
|
error = put_user(size,
|
error = put_user(size,
|
&((struct atmif_sioc *) arg)->length)
|
&((struct atmif_sioc *) arg)->length)
|
? -EFAULT : 0;
|
? -EFAULT : 0;
|
}
|
}
|
done:
|
done:
|
atm_dev_put(dev);
|
atm_dev_put(dev);
|
return error;
|
return error;
|
}
|
}
|
|
|
|
|
EXPORT_SYMBOL(atm_dev_register);
|
EXPORT_SYMBOL(atm_dev_register);
|
EXPORT_SYMBOL(atm_dev_deregister);
|
EXPORT_SYMBOL(atm_dev_deregister);
|
EXPORT_SYMBOL(atm_dev_lookup);
|
EXPORT_SYMBOL(atm_dev_lookup);
|
EXPORT_SYMBOL(shutdown_atm_dev);
|
EXPORT_SYMBOL(shutdown_atm_dev);
|
|
|
