Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 432 insertions, 0 deletions

diff --git a/net/atm/resources.c b/net/atm/resources.c
new file mode 100644
index 000000000000..33f1685dbb77
--- /dev/null
+++ b/net/atm/resources.c
@@ -0,0 +1,432 @@
+/* net/atm/resources.c - Statically allocated resources */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+/* Fixes
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * 2002/01 - don't free the whole struct sock on sk->destruct time,
+ * 	     use the default destruct function initialized by sock_init_data */
+
+
+#include <linux/config.h>
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/atmdev.h>
+#include <linux/sonet.h>
+#include <linux/kernel.h> /* for barrier */
+#include <linux/module.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <net/sock.h>	 /* for struct sock */
+
+#include "common.h"
+#include "resources.h"
+#include "addr.h"
+
+
+LIST_HEAD(atm_devs);
+DEFINE_SPINLOCK(atm_dev_lock);
+
+static struct atm_dev *__alloc_atm_dev(const char *type)
+{
+	struct atm_dev *dev;
+
+	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return NULL;
+	memset(dev, 0, sizeof(*dev));
+	dev->type = type;
+	dev->signal = ATM_PHY_SIG_UNKNOWN;
+	dev->link_rate = ATM_OC3_PCR;
+	spin_lock_init(&dev->lock);
+	INIT_LIST_HEAD(&dev->local);
+
+	return dev;
+}
+
+static void __free_atm_dev(struct atm_dev *dev)
+{
+	kfree(dev);
+}
+
+static struct atm_dev *__atm_dev_lookup(int number)
+{
+	struct atm_dev *dev;
+	struct list_head *p;
+
+	list_for_each(p, &atm_devs) {
+		dev = list_entry(p, struct atm_dev, dev_list);
+		if ((dev->ops) && (dev->number == number)) {
+			atm_dev_hold(dev);
+			return dev;
+		}
+	}
+	return NULL;
+}
+
+struct atm_dev *atm_dev_lookup(int number)
+{
+	struct atm_dev *dev;
+
+	spin_lock(&atm_dev_lock);
+	dev = __atm_dev_lookup(number);
+	spin_unlock(&atm_dev_lock);
+	return dev;
+}
+
+struct atm_dev *atm_dev_register(const char *type, const struct atmdev_ops *ops,
+				 int number, unsigned long *flags)
+{
+	struct atm_dev *dev, *inuse;
+
+	dev = __alloc_atm_dev(type);
+	if (!dev) {
+		printk(KERN_ERR "atm_dev_register: no space for dev %s\n",
+		    type);
+		return NULL;
+	}
+	spin_lock(&atm_dev_lock);
+	if (number != -1) {
+		if ((inuse = __atm_dev_lookup(number))) {
+			atm_dev_put(inuse);
+			spin_unlock(&atm_dev_lock);
+			__free_atm_dev(dev);
+			return NULL;
+		}
+		dev->number = number;
+	} else {
+		dev->number = 0;
+		while ((inuse = __atm_dev_lookup(dev->number))) {
+			atm_dev_put(inuse);
+			dev->number++;
+		}
+	}
+
+	dev->ops = ops;
+	if (flags)
+		dev->flags = *flags;
+	else
+		memset(&dev->flags, 0, sizeof(dev->flags));
+	memset(&dev->stats, 0, sizeof(dev->stats));
+	atomic_set(&dev->refcnt, 1);
+	list_add_tail(&dev->dev_list, &atm_devs);
+	spin_unlock(&atm_dev_lock);
+
+	if (atm_proc_dev_register(dev) < 0) {
+		printk(KERN_ERR "atm_dev_register: "
+		       "atm_proc_dev_register failed for dev %s\n",
+		       type);
+		spin_lock(&atm_dev_lock);
+		list_del(&dev->dev_list);
+		spin_unlock(&atm_dev_lock);
+		__free_atm_dev(dev);
+		return NULL;
+	}
+
+	return dev;
+}
+
+
+void atm_dev_deregister(struct atm_dev *dev)
+{
+	unsigned long warning_time;
+
+	atm_proc_dev_deregister(dev);
+
+	spin_lock(&atm_dev_lock);
+	list_del(&dev->dev_list);
+	spin_unlock(&atm_dev_lock);
+
+        warning_time = jiffies;
+        while (atomic_read(&dev->refcnt) != 1) {
+                msleep(250);
+                if ((jiffies - warning_time) > 10 * HZ) {
+                        printk(KERN_EMERG "atm_dev_deregister: waiting for "
+                               "dev %d to become free. Usage count = %d\n",
+                               dev->number, atomic_read(&dev->refcnt));
+                        warning_time = jiffies;
+                }
+        }
+
+	__free_atm_dev(dev);
+}
+
+void shutdown_atm_dev(struct atm_dev *dev)
+{
+	if (atomic_read(&dev->refcnt) > 1) {
+		set_bit(ATM_DF_CLOSE, &dev->flags);
+		return;
+	}
+	if (dev->ops->dev_close)
+		dev->ops->dev_close(dev);
+	atm_dev_deregister(dev);
+}
+
+
+static void copy_aal_stats(struct k_atm_aal_stats *from,
+    struct atm_aal_stats *to)
+{
+#define __HANDLE_ITEM(i) to->i = atomic_read(&from->i)
+	__AAL_STAT_ITEMS
+#undef __HANDLE_ITEM
+}
+
+
+static void subtract_aal_stats(struct k_atm_aal_stats *from,
+    struct atm_aal_stats *to)
+{
+#define __HANDLE_ITEM(i) atomic_sub(to->i, &from->i)
+	__AAL_STAT_ITEMS
+#undef __HANDLE_ITEM
+}
+
+
+static int fetch_stats(struct atm_dev *dev, struct atm_dev_stats __user *arg, int zero)
+{
+	struct atm_dev_stats tmp;
+	int error = 0;
+
+	copy_aal_stats(&dev->stats.aal0, &tmp.aal0);
+	copy_aal_stats(&dev->stats.aal34, &tmp.aal34);
+	copy_aal_stats(&dev->stats.aal5, &tmp.aal5);
+	if (arg)
+		error = copy_to_user(arg, &tmp, sizeof(tmp));
+	if (zero && !error) {
+		subtract_aal_stats(&dev->stats.aal0, &tmp.aal0);
+		subtract_aal_stats(&dev->stats.aal34, &tmp.aal34);
+		subtract_aal_stats(&dev->stats.aal5, &tmp.aal5);
+	}
+	return error ? -EFAULT : 0;
+}
+
+
+int atm_dev_ioctl(unsigned int cmd, void __user *arg)
+{
+	void __user *buf;
+	int error, len, number, size = 0;
+	struct atm_dev *dev;
+	struct list_head *p;
+	int *tmp_buf, *tmp_p;
+	struct atm_iobuf __user *iobuf = arg;
+	struct atmif_sioc __user *sioc = arg;
+	switch (cmd) {
+		case ATM_GETNAMES:
+			if (get_user(buf, &iobuf->buffer))
+				return -EFAULT;
+			if (get_user(len, &iobuf->length))
+				return -EFAULT;
+			spin_lock(&atm_dev_lock);
+			list_for_each(p, &atm_devs)
+				size += sizeof(int);
+			if (size > len) {
+				spin_unlock(&atm_dev_lock);
+				return -E2BIG;
+			}
+			tmp_buf = kmalloc(size, GFP_ATOMIC);
+			if (!tmp_buf) {
+				spin_unlock(&atm_dev_lock);
+				return -ENOMEM;
+			}
+			tmp_p = tmp_buf;
+			list_for_each(p, &atm_devs) {
+				dev = list_entry(p, struct atm_dev, dev_list);
+				*tmp_p++ = dev->number;
+			}
+			spin_unlock(&atm_dev_lock);
+		        error = ((copy_to_user(buf, tmp_buf, size)) ||
+					put_user(size, &iobuf->length))
+						? -EFAULT : 0;
+			kfree(tmp_buf);
+			return error;
+		default:
+			break;
+	}
+
+	if (get_user(buf, &sioc->arg))
+		return -EFAULT;
+	if (get_user(len, &sioc->length))
+		return -EFAULT;
+	if (get_user(number, &sioc->number))
+		return -EFAULT;
+
+	if (!(dev = atm_dev_lookup(number)))
+		return -ENODEV;
+	
+	switch (cmd) {
+		case ATM_GETTYPE:
+			size = strlen(dev->type) + 1;
+			if (copy_to_user(buf, dev->type, size)) {
+				error = -EFAULT;
+				goto done;
+			}
+			break;
+		case ATM_GETESI:
+			size = ESI_LEN;
+			if (copy_to_user(buf, dev->esi, size)) {
+				error = -EFAULT;
+				goto done;
+			}
+			break;
+		case ATM_SETESI:
+			{
+				int i;
+
+				for (i = 0; i < ESI_LEN; i++)
+					if (dev->esi[i]) {
+						error = -EEXIST;
+						goto done;
+					}
+			}
+			/* fall through */
+		case ATM_SETESIF:
+			{
+				unsigned char esi[ESI_LEN];
+
+				if (!capable(CAP_NET_ADMIN)) {
+					error = -EPERM;
+					goto done;
+				}
+				if (copy_from_user(esi, buf, ESI_LEN)) {
+					error = -EFAULT;
+					goto done;
+				}
+				memcpy(dev->esi, esi, ESI_LEN);
+				error =  ESI_LEN;
+				goto done;
+			}
+		case ATM_GETSTATZ:
+			if (!capable(CAP_NET_ADMIN)) {
+				error = -EPERM;
+				goto done;
+			}
+			/* fall through */
+		case ATM_GETSTAT:
+			size = sizeof(struct atm_dev_stats);
+			error = fetch_stats(dev, buf, cmd == ATM_GETSTATZ);
+			if (error)
+				goto done;
+			break;
+		case ATM_GETCIRANGE:
+			size = sizeof(struct atm_cirange);
+			if (copy_to_user(buf, &dev->ci_range, size)) {
+				error = -EFAULT;
+				goto done;
+			}
+			break;
+		case ATM_GETLINKRATE:
+			size = sizeof(int);
+			if (copy_to_user(buf, &dev->link_rate, size)) {
+				error = -EFAULT;
+				goto done;
+			}
+			break;
+		case ATM_RSTADDR:
+			if (!capable(CAP_NET_ADMIN)) {
+				error = -EPERM;
+				goto done;
+			}
+			atm_reset_addr(dev);
+			break;
+		case ATM_ADDADDR:
+		case ATM_DELADDR:
+			if (!capable(CAP_NET_ADMIN)) {
+				error = -EPERM;
+				goto done;
+			}
+			{
+				struct sockaddr_atmsvc addr;
+
+				if (copy_from_user(&addr, buf, sizeof(addr))) {
+					error = -EFAULT;
+					goto done;
+				}
+				if (cmd == ATM_ADDADDR)
+					error = atm_add_addr(dev, &addr);
+				else
+					error = atm_del_addr(dev, &addr);
+				goto done;
+			}
+		case ATM_GETADDR:
+			error = atm_get_addr(dev, buf, len);
+			if (error < 0)
+				goto done;
+			size = error;
+			/* may return 0, but later on size == 0 means "don't
+			   write the length" */
+			error = put_user(size, &sioc->length)
+				? -EFAULT : 0;
+			goto done;
+		case ATM_SETLOOP:
+			if (__ATM_LM_XTRMT((int) (unsigned long) buf) &&
+			    __ATM_LM_XTLOC((int) (unsigned long) buf) >
+			    __ATM_LM_XTRMT((int) (unsigned long) buf)) {
+				error = -EINVAL;
+				goto done;
+			}
+			/* fall through */
+		case ATM_SETCIRANGE:
+		case SONET_GETSTATZ:
+		case SONET_SETDIAG:
+		case SONET_CLRDIAG:
+		case SONET_SETFRAMING:
+			if (!capable(CAP_NET_ADMIN)) {
+				error = -EPERM;
+				goto done;
+			}
+			/* fall through */
+		default:
+			if (!dev->ops->ioctl) {
+				error = -EINVAL;
+				goto done;
+			}
+			size = dev->ops->ioctl(dev, cmd, buf);
+			if (size < 0) {
+				error = (size == -ENOIOCTLCMD ? -EINVAL : size);
+				goto done;
+			}
+	}
+	
+	if (size)
+		error = put_user(size, &sioc->length)
+			? -EFAULT : 0;
+	else
+		error = 0;
+done:
+	atm_dev_put(dev);
+	return error;
+}
+
+static __inline__ void *dev_get_idx(loff_t left)
+{
+	struct list_head *p;
+
+	list_for_each(p, &atm_devs) {
+		if (!--left)
+			break;
+	}
+	return (p != &atm_devs) ? p : NULL;
+}
+
+void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ 	spin_lock(&atm_dev_lock);
+	return *pos ? dev_get_idx(*pos) : (void *) 1;
+}
+
+void atm_dev_seq_stop(struct seq_file *seq, void *v)
+{
+ 	spin_unlock(&atm_dev_lock);
+}
+ 
+void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	++*pos;
+	v = (v == (void *)1) ? atm_devs.next : ((struct list_head *)v)->next;
+	return (v == &atm_devs) ? NULL : v;
+}
+
+
+EXPORT_SYMBOL(atm_dev_register);
+EXPORT_SYMBOL(atm_dev_deregister);
+EXPORT_SYMBOL(atm_dev_lookup);
+EXPORT_SYMBOL(shutdown_atm_dev);