* [PATCH][ATM]: point to multipoint signalling (from ekinzie@cmf.nrl.navy.mil)
@ 2004-10-18 21:21 chas williams (contractor)
2004-10-21 5:08 ` David S. Miller
0 siblings, 1 reply; 2+ messages in thread
From: chas williams (contractor) @ 2004-10-18 21:21 UTC (permalink / raw)
To: netdev; +Cc: davem
this patch adds the kernel support necessary for point to
multipoint signalling. please apply to 2.6.
thanks!
# This is a BitKeeper generated diff -Nru style patch.
#
# ChangeSet
# 2004/10/08 13:31:46-04:00 chas@relax.cmf.nrl.navy.mil
# [ATM]: point to multipoint signalling (from ekinzie@cmf.nrl.navy.mil)
#
# net/atm/svc.c
# 2004/10/08 13:31:29-04:00 chas@relax.cmf.nrl.navy.mil +123 -19
# [ATM]: point to multipoint signalling (from ekinzie@cmf.nrl.navy.mil)
#
# net/atm/signaling.c
# 2004/10/08 13:31:29-04:00 chas@relax.cmf.nrl.navy.mil +11 -0
# [ATM]: point to multipoint signalling (from ekinzie@cmf.nrl.navy.mil)
#
# include/linux/atmsvc.h
# 2004/10/08 13:31:29-04:00 chas@relax.cmf.nrl.navy.mil +4 -3
# [ATM]: point to multipoint signalling (from ekinzie@cmf.nrl.navy.mil)
#
# include/linux/atmdev.h
# 2004/10/08 13:31:29-04:00 chas@relax.cmf.nrl.navy.mil +4 -0
# [ATM]: point to multipoint signalling (from ekinzie@cmf.nrl.navy.mil)
#
# include/linux/atm.h
# 2004/10/08 13:31:29-04:00 chas@relax.cmf.nrl.navy.mil +3 -0
# [ATM]: point to multipoint signalling (from ekinzie@cmf.nrl.navy.mil)
#
diff -Nru a/include/linux/atm.h b/include/linux/atm.h
--- a/include/linux/atm.h 2004-10-18 16:14:11 -04:00
+++ b/include/linux/atm.h 2004-10-18 16:14:11 -04:00
@@ -78,6 +78,9 @@
/* Service Access Point */
#define SO_ATMPVC __SO_ENCODE(SOL_ATM,4,struct sockaddr_atmpvc)
/* "PVC" address (also for SVCs); get only */
+#define SO_MULTIPOINT __SO_ENCODE(SOL_ATM, 5, int)
+ /* make this vc a p2mp */
+
/*
* Note @@@: since the socket layers don't really distinguish the control and
diff -Nru a/include/linux/atmdev.h b/include/linux/atmdev.h
--- a/include/linux/atmdev.h 2004-10-18 16:14:11 -04:00
+++ b/include/linux/atmdev.h 2004-10-18 16:14:11 -04:00
@@ -95,6 +95,10 @@
/* set backend handler */
#define ATM_NEWBACKENDIF _IOW('a',ATMIOC_SPECIAL+3,atm_backend_t)
/* use backend to make new if */
+#define ATM_ADDPARTY _IOW('a', ATMIOC_SPECIAL+4,struct atm_iobuf)
+ /* add party to p2mp call */
+#define ATM_DROPPARTY _IOW('a', ATMIOC_SPECIAL+5,int)
+ /* drop party from p2mp call */
/*
* These are backend handkers that can be set via the ATM_SETBACKEND call
diff -Nru a/include/linux/atmsvc.h b/include/linux/atmsvc.h
--- a/include/linux/atmsvc.h 2004-10-18 16:14:11 -04:00
+++ b/include/linux/atmsvc.h 2004-10-18 16:14:11 -04:00
@@ -14,9 +14,10 @@
#define ATMSIGD_CTRL _IO('a',ATMIOC_SPECIAL)
/* become ATM signaling demon control socket */
-enum atmsvc_msg_type { as_catch_null,as_bind,as_connect,as_accept,as_reject,
- as_listen,as_okay,as_error,as_indicate,as_close,as_itf_notify,
- as_modify,as_identify,as_terminate };
+enum atmsvc_msg_type { as_catch_null, as_bind, as_connect, as_accept, as_reject,
+ as_listen, as_okay, as_error, as_indicate, as_close,
+ as_itf_notify, as_modify, as_identify, as_terminate,
+ as_addparty, as_dropparty };
struct atmsvc_msg {
enum atmsvc_msg_type type;
diff -Nru a/net/atm/signaling.c b/net/atm/signaling.c
--- a/net/atm/signaling.c 2004-10-18 16:14:11 -04:00
+++ b/net/atm/signaling.c 2004-10-18 16:14:11 -04:00
@@ -152,6 +152,11 @@
case as_modify:
modify_qos(vcc,msg);
break;
+ case as_addparty:
+ case as_dropparty:
+ vcc->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);
@@ -169,6 +174,7 @@
{
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)))
@@ -184,6 +190,11 @@
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);
}
diff -Nru a/net/atm/svc.c b/net/atm/svc.c
--- a/net/atm/svc.c 2004-10-18 16:14:11 -04:00
+++ b/net/atm/svc.c 2004-10-18 16:14:11 -04:00
@@ -194,10 +194,6 @@
}
break;
case SS_UNCONNECTED:
- if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
- error = -EINVAL;
- goto out;
- }
addr = (struct sockaddr_atmsvc *) sockaddr;
if (addr->sas_family != AF_ATMSVC) {
error = -EAFNOSUPPORT;
@@ -458,24 +454,48 @@
}
-static int svc_setsockopt(struct socket *sock,int level,int optname,
- char __user *optval,int optlen)
+static int svc_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
{
struct sock *sk = sock->sk;
- struct atm_vcc *vcc;
- int error = 0;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int value, error = 0;
- if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP ||
- optlen != sizeof(struct atm_sap)) {
- error = vcc_setsockopt(sock, level, optname, optval, optlen);
- goto out;
- }
- vcc = ATM_SD(sock);
- if (copy_from_user(&vcc->sap, optval, optlen)) {
- error = -EFAULT;
- goto out;
+ lock_sock(sk);
+ switch (optname) {
+ case SO_ATMSAP:
+ if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (copy_from_user(&vcc->sap, optval, optlen)) {
+ error = -EFAULT;
+ goto out;
+ }
+ set_bit(ATM_VF_HASSAP, &vcc->flags);
+ break;
+ case SO_MULTIPOINT:
+ if (level != SOL_ATM || optlen != sizeof(int)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (get_user(value, (int *) optval)) {
+ error = -EFAULT;
+ goto out;
+ }
+ if (value == 1) {
+ set_bit(ATM_VF_SESSION, &vcc->flags);
+ } else if (value == 0) {
+ clear_bit(ATM_VF_SESSION, &vcc->flags);
+ } else {
+ error = -EINVAL;
+ }
+ break;
+ default:
+ error = vcc_setsockopt(sock, level, optname,
+ optval, optlen);
}
- set_bit(ATM_VF_HASSAP, &vcc->flags);
+
out:
release_sock(sk);
return error;
@@ -511,6 +531,90 @@
}
+static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
+ int sockaddr_len, int flags)
+{
+ DEFINE_WAIT(wait);
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ lock_sock(vcc->sk);
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(vcc->sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ sigd_enq(vcc, as_addparty, NULL, NULL,
+ (struct sockaddr_atmsvc *) sockaddr);
+ if (flags & O_NONBLOCK) {
+ finish_wait(vcc->sk->sk_sleep, &wait);
+ error = -EINPROGRESS;
+ goto out;
+ }
+ DPRINTK("svc_addparty added wait queue\n");
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(vcc->sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ }
+ finish_wait(vcc->sk->sk_sleep, &wait);
+ error = xchg(&vcc->sk->sk_err_soft, 0);
+out:
+ release_sock(vcc->sk);
+ return error;
+}
+
+
+static int svc_dropparty(struct socket *sock, int ep_ref)
+{
+ DEFINE_WAIT(wait);
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ lock_sock(vcc->sk);
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(vcc->sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(vcc->sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ }
+ finish_wait(vcc->sk->sk_sleep, &wait);
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ error = xchg(&vcc->sk->sk_err_soft, 0);
+out:
+ release_sock(vcc->sk);
+ return error;
+}
+
+
+static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ int error, ep_ref;
+ struct sockaddr_atmsvc sa;
+ struct atm_vcc *vcc = ATM_SD(sock);
+
+ switch (cmd) {
+ case ATM_ADDPARTY:
+ if (!test_bit(ATM_VF_SESSION, &vcc->flags))
+ return -EINVAL;
+ if (copy_from_user(&sa, (void *) arg, sizeof(sa)))
+ return -EFAULT;
+ error = svc_addparty(sock, (struct sockaddr *) &sa, sizeof(sa), 0);
+ break;
+ case ATM_DROPPARTY:
+ if (!test_bit(ATM_VF_SESSION, &vcc->flags))
+ return -EINVAL;
+ if (copy_from_user(&ep_ref, (void *) arg, sizeof(int)))
+ return -EFAULT;
+ error = svc_dropparty(sock, ep_ref);
+ break;
+ default:
+ error = vcc_ioctl(sock, cmd, arg);
+ }
+
+ return error;
+}
+
static struct proto_ops svc_proto_ops = {
.family = PF_ATMSVC,
.owner = THIS_MODULE,
@@ -522,7 +626,7 @@
.accept = svc_accept,
.getname = svc_getname,
.poll = vcc_poll,
- .ioctl = vcc_ioctl,
+ .ioctl = svc_ioctl,
.listen = svc_listen,
.shutdown = svc_shutdown,
.setsockopt = svc_setsockopt,
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2004-10-18 21:21 [PATCH][ATM]: point to multipoint signalling (from ekinzie@cmf.nrl.navy.mil) chas williams (contractor)
2004-10-21 5:08 ` David S. Miller
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