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, 280 insertions, 0 deletions

diff --git a/net/atm/signaling.c b/net/atm/signaling.c
new file mode 100644
index 00000000000..6ff803154c0
--- /dev/null
+++ b/net/atm/signaling.c
@@ -0,0 +1,280 @@
+/* net/atm/signaling.c - ATM signaling */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/errno.h>        /* error codes */
+#include <linux/kernel.h>       /* printk */
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/sched.h>        /* jiffies and HZ */
+#include <linux/atm.h>          /* ATM stuff */
+#include <linux/atmsap.h>
+#include <linux/atmsvc.h>
+#include <linux/atmdev.h>
+#include <linux/bitops.h>
+
+#include "resources.h"
+#include "signaling.h"
+
+
+#undef WAIT_FOR_DEMON           /* #define this if system calls on SVC sockets
+                                   should block until the demon runs.
+                                   Danger: may cause nasty hangs if the demon
+                                   crashes. */
+
+#if 0
+#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+
+struct atm_vcc *sigd = NULL;
+#ifdef WAIT_FOR_DEMON
+static DECLARE_WAIT_QUEUE_HEAD(sigd_sleep);
+#endif
+
+
+static void sigd_put_skb(struct sk_buff *skb)
+{
+#ifdef WAIT_FOR_DEMON
+        static unsigned long silence;
+        DECLARE_WAITQUEUE(wait,current);
+
+        add_wait_queue(&sigd_sleep,&wait);
+        while (!sigd) {
+                set_current_state(TASK_UNINTERRUPTIBLE);
+                if (time_after(jiffies, silence) || silence == 0) {
+                        printk(KERN_INFO "atmsvc: waiting for signaling demon "
+                            "...\n");
+                        silence = (jiffies+30*HZ)|1;
+                }
+                schedule();
+        }
+        current->state = TASK_RUNNING;
+        remove_wait_queue(&sigd_sleep,&wait);
+#else
+        if (!sigd) {
+                printk(KERN_WARNING "atmsvc: no signaling demon\n");
+                kfree_skb(skb);
+                return;
+        }
+#endif
+        atm_force_charge(sigd,skb->truesize);
+        skb_queue_tail(&sk_atm(sigd)->sk_receive_queue,skb);
+        sk_atm(sigd)->sk_data_ready(sk_atm(sigd), skb->len);
+}
+
+
+static void modify_qos(struct atm_vcc *vcc,struct atmsvc_msg *msg)
+{
+        struct sk_buff *skb;
+
+        if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
+            !test_bit(ATM_VF_READY,&vcc->flags))
+                return;
+        msg->type = as_error;
+        if (!vcc->dev->ops->change_qos) msg->reply = -EOPNOTSUPP;
+        else {
+                /* should lock VCC */
+                msg->reply = vcc->dev->ops->change_qos(vcc,&msg->qos,
+                    msg->reply);
+                if (!msg->reply) msg->type = as_okay;
+        }
+        /*
+         * Should probably just turn around the old skb. But the, the buffer
+         * space accounting needs to follow the change too. Maybe later.
+         */
+        while (!(skb = alloc_skb(sizeof(struct atmsvc_msg),GFP_KERNEL)))
+                schedule();
+        *(struct atmsvc_msg *) skb_put(skb,sizeof(struct atmsvc_msg)) = *msg;
+        sigd_put_skb(skb);
+}
+
+
+static int sigd_send(struct atm_vcc *vcc,struct sk_buff *skb)
+{
+        struct atmsvc_msg *msg;
+        struct atm_vcc *session_vcc;
+        struct sock *sk;
+
+        msg = (struct atmsvc_msg *) skb->data;
+        atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+        DPRINTK("sigd_send %d (0x%lx)\n",(int) msg->type,
+          (unsigned long) msg->vcc);
+        vcc = *(struct atm_vcc **) &msg->vcc;
+        sk = sk_atm(vcc);
+
+        switch (msg->type) {
+                case as_okay:
+                        sk->sk_err = -msg->reply;
+                        clear_bit(ATM_VF_WAITING, &vcc->flags);
+                        if (!*vcc->local.sas_addr.prv &&
+                            !*vcc->local.sas_addr.pub) {
+                                vcc->local.sas_family = AF_ATMSVC;
+                                memcpy(vcc->local.sas_addr.prv,
+                                    msg->local.sas_addr.prv,ATM_ESA_LEN);
+                                memcpy(vcc->local.sas_addr.pub,
+                                    msg->local.sas_addr.pub,ATM_E164_LEN+1);
+                        }
+                        session_vcc = vcc->session ? vcc->session : vcc;
+                        if (session_vcc->vpi || session_vcc->vci) break;
+                        session_vcc->itf = msg->pvc.sap_addr.itf;
+                        session_vcc->vpi = msg->pvc.sap_addr.vpi;
+                        session_vcc->vci = msg->pvc.sap_addr.vci;
+                        if (session_vcc->vpi || session_vcc->vci)
+                                session_vcc->qos = msg->qos;
+                        break;
+                case as_error:
+                        clear_bit(ATM_VF_REGIS,&vcc->flags);
+                        clear_bit(ATM_VF_READY,&vcc->flags);
+                        sk->sk_err = -msg->reply;
+                        clear_bit(ATM_VF_WAITING, &vcc->flags);
+                        break;
+                case as_indicate:
+                        vcc = *(struct atm_vcc **) &msg->listen_vcc;
+                        DPRINTK("as_indicate!!!\n");
+                        lock_sock(sk);
+                        if (sk_acceptq_is_full(sk)) {
+                                sigd_enq(NULL,as_reject,vcc,NULL,NULL);
+                                dev_kfree_skb(skb);
+                                goto as_indicate_complete;
+                        }
+                        sk->sk_ack_backlog++;
+                        skb_queue_tail(&sk->sk_receive_queue, skb);
+                        DPRINTK("waking sk->sk_sleep 0x%p\n", sk->sk_sleep);
+                        sk->sk_state_change(sk);
+as_indicate_complete:
+                        release_sock(sk);
+                        return 0;
+                case as_close:
+                        set_bit(ATM_VF_RELEASED,&vcc->flags);
+                        vcc_release_async(vcc, msg->reply);
+                        goto out;
+                case as_modify:
+                        modify_qos(vcc,msg);
+                        break;
+                case as_addparty:
+                case as_dropparty:
+                        sk->sk_err_soft = msg->reply;   /* < 0 failure, otherwise ep_ref */
+                        clear_bit(ATM_VF_WAITING, &vcc->flags);
+                        break;
+                default:
+                        printk(KERN_ALERT "sigd_send: bad message type %d\n",
+                            (int) msg->type);
+                        return -EINVAL;
+        }
+        sk->sk_state_change(sk);
+out:
+        dev_kfree_skb(skb);
+        return 0;
+}
+
+
+void sigd_enq2(struct atm_vcc *vcc,enum atmsvc_msg_type type,
+    struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc,
+    const struct sockaddr_atmsvc *svc,const struct atm_qos *qos,int reply)
+{
+        struct sk_buff *skb;
+        struct atmsvc_msg *msg;
+        static unsigned session = 0;
+
+        DPRINTK("sigd_enq %d (0x%p)\n",(int) type,vcc);
+        while (!(skb = alloc_skb(sizeof(struct atmsvc_msg),GFP_KERNEL)))
+                schedule();
+        msg = (struct atmsvc_msg *) skb_put(skb,sizeof(struct atmsvc_msg));
+        memset(msg,0,sizeof(*msg));
+        msg->type = type;
+        *(struct atm_vcc **) &msg->vcc = vcc;
+        *(struct atm_vcc **) &msg->listen_vcc = listen_vcc;
+        msg->reply = reply;
+        if (qos) msg->qos = *qos;
+        if (vcc) msg->sap = vcc->sap;
+        if (svc) msg->svc = *svc;
+        if (vcc) msg->local = vcc->local;
+        if (pvc) msg->pvc = *pvc;
+        if (vcc) {
+                if (type == as_connect && test_bit(ATM_VF_SESSION, &vcc->flags))
+                        msg->session = ++session;
+                        /* every new pmp connect gets the next session number */
+        }
+        sigd_put_skb(skb);
+        if (vcc) set_bit(ATM_VF_REGIS,&vcc->flags);
+}
+
+
+void sigd_enq(struct atm_vcc *vcc,enum atmsvc_msg_type type,
+    struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc,
+    const struct sockaddr_atmsvc *svc)
+{
+        sigd_enq2(vcc,type,listen_vcc,pvc,svc,vcc ? &vcc->qos : NULL,0);
+        /* other ISP applications may use "reply" */
+}
+
+
+static void purge_vcc(struct atm_vcc *vcc)
+{
+        if (sk_atm(vcc)->sk_family == PF_ATMSVC &&
+            !test_bit(ATM_VF_META,&vcc->flags)) {
+                set_bit(ATM_VF_RELEASED,&vcc->flags);
+                vcc_release_async(vcc, -EUNATCH);
+        }
+}
+
+
+static void sigd_close(struct atm_vcc *vcc)
+{
+        struct hlist_node *node;
+        struct sock *s;
+        int i;
+
+        DPRINTK("sigd_close\n");
+        sigd = NULL;
+        if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
+                printk(KERN_ERR "sigd_close: closing with requests pending\n");
+        skb_queue_purge(&sk_atm(vcc)->sk_receive_queue);
+
+        read_lock(&vcc_sklist_lock);
+        for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
+                struct hlist_head *head = &vcc_hash[i];
+
+                sk_for_each(s, node, head) {
+                        struct atm_vcc *vcc = atm_sk(s);
+
+                        if (vcc->dev)
+                                purge_vcc(vcc);
+                }
+        }
+        read_unlock(&vcc_sklist_lock);
+}
+
+
+static struct atmdev_ops sigd_dev_ops = {
+        .close = sigd_close,
+        .send = sigd_send
+};
+
+
+static struct atm_dev sigd_dev = {
+        .ops =          &sigd_dev_ops,
+        .type =         "sig",
+        .number =       999,
+        .lock =         SPIN_LOCK_UNLOCKED
+};
+
+
+int sigd_attach(struct atm_vcc *vcc)
+{
+        if (sigd) return -EADDRINUSE;
+        DPRINTK("sigd_attach\n");
+        sigd = vcc;
+        vcc->dev = &sigd_dev;
+        vcc_insert_socket(sk_atm(vcc));
+        set_bit(ATM_VF_META,&vcc->flags);
+        set_bit(ATM_VF_READY,&vcc->flags);
+#ifdef WAIT_FOR_DEMON
+        wake_up(&sigd_sleep);
+#endif
+        return 0;
+}