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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/atm/common.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-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!
Diffstat (limited to 'net/atm/common.c')
-rw-r--r--net/atm/common.c804
1 files changed, 804 insertions, 0 deletions
diff --git a/net/atm/common.c b/net/atm/common.c
new file mode 100644
index 00000000000..6d16be334ea
--- /dev/null
+++ b/net/atm/common.c
@@ -0,0 +1,804 @@
+/* net/atm/common.c - ATM sockets (common part for PVC and SVC) */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kmod.h>
+#include <linux/net.h> /* struct socket, struct proto_ops */
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmdev.h>
+#include <linux/socket.h> /* SOL_SOCKET */
+#include <linux/errno.h> /* error codes */
+#include <linux/capability.h>
+#include <linux/mm.h> /* verify_area */
+#include <linux/sched.h>
+#include <linux/time.h> /* struct timeval */
+#include <linux/skbuff.h>
+#include <linux/bitops.h>
+#include <linux/init.h>
+#include <net/sock.h> /* struct sock */
+
+#include <asm/uaccess.h>
+#include <asm/atomic.h>
+#include <asm/poll.h>
+
+
+#include "resources.h" /* atm_find_dev */
+#include "common.h" /* prototypes */
+#include "protocols.h" /* atm_init_<transport> */
+#include "addr.h" /* address registry */
+#include "signaling.h" /* for WAITING and sigd_attach */
+
+
+#if 0
+#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
+DEFINE_RWLOCK(vcc_sklist_lock);
+
+static void __vcc_insert_socket(struct sock *sk)
+{
+ struct atm_vcc *vcc = atm_sk(sk);
+ struct hlist_head *head = &vcc_hash[vcc->vci &
+ (VCC_HTABLE_SIZE - 1)];
+ sk->sk_hashent = vcc->vci & (VCC_HTABLE_SIZE - 1);
+ sk_add_node(sk, head);
+}
+
+void vcc_insert_socket(struct sock *sk)
+{
+ write_lock_irq(&vcc_sklist_lock);
+ __vcc_insert_socket(sk);
+ write_unlock_irq(&vcc_sklist_lock);
+}
+
+static void vcc_remove_socket(struct sock *sk)
+{
+ write_lock_irq(&vcc_sklist_lock);
+ sk_del_node_init(sk);
+ write_unlock_irq(&vcc_sklist_lock);
+}
+
+
+static struct sk_buff *alloc_tx(struct atm_vcc *vcc,unsigned int size)
+{
+ struct sk_buff *skb;
+ struct sock *sk = sk_atm(vcc);
+
+ if (atomic_read(&sk->sk_wmem_alloc) && !atm_may_send(vcc, size)) {
+ DPRINTK("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
+ atomic_read(&sk->sk_wmem_alloc), size,
+ sk->sk_sndbuf);
+ return NULL;
+ }
+ while (!(skb = alloc_skb(size,GFP_KERNEL))) schedule();
+ DPRINTK("AlTx %d += %d\n", atomic_read(&sk->sk_wmem_alloc),
+ skb->truesize);
+ atomic_add(skb->truesize, &sk->sk_wmem_alloc);
+ return skb;
+}
+
+
+EXPORT_SYMBOL(vcc_hash);
+EXPORT_SYMBOL(vcc_sklist_lock);
+EXPORT_SYMBOL(vcc_insert_socket);
+
+static void vcc_sock_destruct(struct sock *sk)
+{
+ if (atomic_read(&sk->sk_rmem_alloc))
+ printk(KERN_DEBUG "vcc_sock_destruct: rmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_rmem_alloc));
+
+ if (atomic_read(&sk->sk_wmem_alloc))
+ printk(KERN_DEBUG "vcc_sock_destruct: wmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_wmem_alloc));
+}
+
+static void vcc_def_wakeup(struct sock *sk)
+{
+ read_lock(&sk->sk_callback_lock);
+ if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
+ wake_up(sk->sk_sleep);
+ read_unlock(&sk->sk_callback_lock);
+}
+
+static inline int vcc_writable(struct sock *sk)
+{
+ struct atm_vcc *vcc = atm_sk(sk);
+
+ return (vcc->qos.txtp.max_sdu +
+ atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
+}
+
+static void vcc_write_space(struct sock *sk)
+{
+ read_lock(&sk->sk_callback_lock);
+
+ if (vcc_writable(sk)) {
+ if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
+ wake_up_interruptible(sk->sk_sleep);
+
+ sk_wake_async(sk, 2, POLL_OUT);
+ }
+
+ read_unlock(&sk->sk_callback_lock);
+}
+
+static struct proto vcc_proto = {
+ .name = "VCC",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct atm_vcc),
+};
+
+int vcc_create(struct socket *sock, int protocol, int family)
+{
+ struct sock *sk;
+ struct atm_vcc *vcc;
+
+ sock->sk = NULL;
+ if (sock->type == SOCK_STREAM)
+ return -EINVAL;
+ sk = sk_alloc(family, GFP_KERNEL, &vcc_proto, 1);
+ if (!sk)
+ return -ENOMEM;
+ sock_init_data(sock, sk);
+ sk->sk_state_change = vcc_def_wakeup;
+ sk->sk_write_space = vcc_write_space;
+
+ vcc = atm_sk(sk);
+ vcc->dev = NULL;
+ memset(&vcc->local,0,sizeof(struct sockaddr_atmsvc));
+ memset(&vcc->remote,0,sizeof(struct sockaddr_atmsvc));
+ vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
+ atomic_set(&sk->sk_wmem_alloc, 0);
+ atomic_set(&sk->sk_rmem_alloc, 0);
+ vcc->push = NULL;
+ vcc->pop = NULL;
+ vcc->push_oam = NULL;
+ vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
+ vcc->atm_options = vcc->aal_options = 0;
+ sk->sk_destruct = vcc_sock_destruct;
+ return 0;
+}
+
+
+static void vcc_destroy_socket(struct sock *sk)
+{
+ struct atm_vcc *vcc = atm_sk(sk);
+ struct sk_buff *skb;
+
+ set_bit(ATM_VF_CLOSE, &vcc->flags);
+ clear_bit(ATM_VF_READY, &vcc->flags);
+ if (vcc->dev) {
+ if (vcc->dev->ops->close)
+ vcc->dev->ops->close(vcc);
+ if (vcc->push)
+ vcc->push(vcc, NULL); /* atmarpd has no push */
+
+ vcc_remove_socket(sk); /* no more receive */
+
+ while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+ atm_return(vcc,skb->truesize);
+ kfree_skb(skb);
+ }
+
+ module_put(vcc->dev->ops->owner);
+ atm_dev_put(vcc->dev);
+ }
+}
+
+
+int vcc_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+
+ if (sk) {
+ lock_sock(sk);
+ vcc_destroy_socket(sock->sk);
+ release_sock(sk);
+ sock_put(sk);
+ }
+
+ return 0;
+}
+
+
+void vcc_release_async(struct atm_vcc *vcc, int reply)
+{
+ struct sock *sk = sk_atm(vcc);
+
+ set_bit(ATM_VF_CLOSE, &vcc->flags);
+ sk->sk_shutdown |= RCV_SHUTDOWN;
+ sk->sk_err = -reply;
+ clear_bit(ATM_VF_WAITING, &vcc->flags);
+ sk->sk_state_change(sk);
+}
+
+
+EXPORT_SYMBOL(vcc_release_async);
+
+
+static int adjust_tp(struct atm_trafprm *tp,unsigned char aal)
+{
+ int max_sdu;
+
+ if (!tp->traffic_class) return 0;
+ switch (aal) {
+ case ATM_AAL0:
+ max_sdu = ATM_CELL_SIZE-1;
+ break;
+ case ATM_AAL34:
+ max_sdu = ATM_MAX_AAL34_PDU;
+ break;
+ default:
+ printk(KERN_WARNING "ATM: AAL problems ... "
+ "(%d)\n",aal);
+ /* fall through */
+ case ATM_AAL5:
+ max_sdu = ATM_MAX_AAL5_PDU;
+ }
+ if (!tp->max_sdu) tp->max_sdu = max_sdu;
+ else if (tp->max_sdu > max_sdu) return -EINVAL;
+ if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV;
+ return 0;
+}
+
+
+static int check_ci(struct atm_vcc *vcc, short vpi, int vci)
+{
+ struct hlist_head *head = &vcc_hash[vci &
+ (VCC_HTABLE_SIZE - 1)];
+ struct hlist_node *node;
+ struct sock *s;
+ struct atm_vcc *walk;
+
+ sk_for_each(s, node, head) {
+ walk = atm_sk(s);
+ if (walk->dev != vcc->dev)
+ continue;
+ if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
+ walk->vci == vci && ((walk->qos.txtp.traffic_class !=
+ ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
+ (walk->qos.rxtp.traffic_class != ATM_NONE &&
+ vcc->qos.rxtp.traffic_class != ATM_NONE)))
+ return -EADDRINUSE;
+ }
+
+ /* allow VCCs with same VPI/VCI iff they don't collide on
+ TX/RX (but we may refuse such sharing for other reasons,
+ e.g. if protocol requires to have both channels) */
+
+ return 0;
+}
+
+
+static int find_ci(struct atm_vcc *vcc, short *vpi, int *vci)
+{
+ static short p; /* poor man's per-device cache */
+ static int c;
+ short old_p;
+ int old_c;
+ int err;
+
+ if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
+ err = check_ci(vcc, *vpi, *vci);
+ return err;
+ }
+ /* last scan may have left values out of bounds for current device */
+ if (*vpi != ATM_VPI_ANY)
+ p = *vpi;
+ else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
+ p = 0;
+ if (*vci != ATM_VCI_ANY)
+ c = *vci;
+ else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
+ c = ATM_NOT_RSV_VCI;
+ old_p = p;
+ old_c = c;
+ do {
+ if (!check_ci(vcc, p, c)) {
+ *vpi = p;
+ *vci = c;
+ return 0;
+ }
+ if (*vci == ATM_VCI_ANY) {
+ c++;
+ if (c >= 1 << vcc->dev->ci_range.vci_bits)
+ c = ATM_NOT_RSV_VCI;
+ }
+ if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
+ *vpi == ATM_VPI_ANY) {
+ p++;
+ if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0;
+ }
+ }
+ while (old_p != p || old_c != c);
+ return -EADDRINUSE;
+}
+
+
+static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
+ int vci)
+{
+ struct sock *sk = sk_atm(vcc);
+ int error;
+
+ if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY &&
+ vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC &&
+ vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits))
+ return -EINVAL;
+ if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
+ return -EPERM;
+ error = 0;
+ if (!try_module_get(dev->ops->owner))
+ return -ENODEV;
+ vcc->dev = dev;
+ write_lock_irq(&vcc_sklist_lock);
+ if ((error = find_ci(vcc, &vpi, &vci))) {
+ write_unlock_irq(&vcc_sklist_lock);
+ goto fail_module_put;
+ }
+ vcc->vpi = vpi;
+ vcc->vci = vci;
+ __vcc_insert_socket(sk);
+ write_unlock_irq(&vcc_sklist_lock);
+ switch (vcc->qos.aal) {
+ case ATM_AAL0:
+ error = atm_init_aal0(vcc);
+ vcc->stats = &dev->stats.aal0;
+ break;
+ case ATM_AAL34:
+ error = atm_init_aal34(vcc);
+ vcc->stats = &dev->stats.aal34;
+ break;
+ case ATM_NO_AAL:
+ /* ATM_AAL5 is also used in the "0 for default" case */
+ vcc->qos.aal = ATM_AAL5;
+ /* fall through */
+ case ATM_AAL5:
+ error = atm_init_aal5(vcc);
+ vcc->stats = &dev->stats.aal5;
+ break;
+ default:
+ error = -EPROTOTYPE;
+ }
+ if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal);
+ if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal);
+ if (error)
+ goto fail;
+ DPRINTK("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal);
+ DPRINTK(" TX: %d, PCR %d..%d, SDU %d\n",vcc->qos.txtp.traffic_class,
+ vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu);
+ DPRINTK(" RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class,
+ vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu);
+
+ if (dev->ops->open) {
+ if ((error = dev->ops->open(vcc)))
+ goto fail;
+ }
+ return 0;
+
+fail:
+ vcc_remove_socket(sk);
+fail_module_put:
+ module_put(dev->ops->owner);
+ /* ensure we get dev module ref count correct */
+ vcc->dev = NULL;
+ return error;
+}
+
+
+int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
+{
+ struct atm_dev *dev;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ DPRINTK("vcc_connect (vpi %d, vci %d)\n",vpi,vci);
+ if (sock->state == SS_CONNECTED)
+ return -EISCONN;
+ if (sock->state != SS_UNCONNECTED)
+ return -EINVAL;
+ if (!(vpi || vci))
+ return -EINVAL;
+
+ if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC)
+ clear_bit(ATM_VF_PARTIAL,&vcc->flags);
+ else
+ if (test_bit(ATM_VF_PARTIAL,&vcc->flags))
+ return -EINVAL;
+ DPRINTK("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; "
+ "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n",
+ vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr,
+ vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu,
+ vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr,
+ vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu,
+ vcc->qos.aal == ATM_AAL5 ? "" : vcc->qos.aal == ATM_AAL0 ? "" :
+ " ??? code ",vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal);
+ if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
+ return -EBADFD;
+ if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
+ vcc->qos.rxtp.traffic_class == ATM_ANYCLASS)
+ return -EINVAL;
+ if (itf != ATM_ITF_ANY) {
+ dev = atm_dev_lookup(itf);
+ if (!dev)
+ return -ENODEV;
+ error = __vcc_connect(vcc, dev, vpi, vci);
+ if (error) {
+ atm_dev_put(dev);
+ return error;
+ }
+ } else {
+ struct list_head *p, *next;
+
+ dev = NULL;
+ spin_lock(&atm_dev_lock);
+ list_for_each_safe(p, next, &atm_devs) {
+ dev = list_entry(p, struct atm_dev, dev_list);
+ atm_dev_hold(dev);
+ spin_unlock(&atm_dev_lock);
+ if (!__vcc_connect(vcc, dev, vpi, vci))
+ break;
+ atm_dev_put(dev);
+ dev = NULL;
+ spin_lock(&atm_dev_lock);
+ }
+ spin_unlock(&atm_dev_lock);
+ if (!dev)
+ return -ENODEV;
+ }
+ if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
+ set_bit(ATM_VF_PARTIAL,&vcc->flags);
+ if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags))
+ sock->state = SS_CONNECTED;
+ return 0;
+}
+
+
+int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
+ size_t size, int flags)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc;
+ struct sk_buff *skb;
+ int copied, error = -EINVAL;
+
+ if (sock->state != SS_CONNECTED)
+ return -ENOTCONN;
+ if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */
+ return -EOPNOTSUPP;
+ vcc = ATM_SD(sock);
+ if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
+ test_bit(ATM_VF_CLOSE,&vcc->flags) ||
+ !test_bit(ATM_VF_READY, &vcc->flags))
+ return 0;
+
+ skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error);
+ if (!skb)
+ return error;
+
+ copied = skb->len;
+ if (copied > size) {
+ copied = size;
+ msg->msg_flags |= MSG_TRUNC;
+ }
+
+ error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+ if (error)
+ return error;
+ sock_recv_timestamp(msg, sk, skb);
+ DPRINTK("RcvM %d -= %d\n", atomic_read(&sk->rmem_alloc), skb->truesize);
+ atm_return(vcc, skb->truesize);
+ skb_free_datagram(sk, skb);
+ return copied;
+}
+
+
+int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
+ size_t total_len)
+{
+ struct sock *sk = sock->sk;
+ DEFINE_WAIT(wait);
+ struct atm_vcc *vcc;
+ struct sk_buff *skb;
+ int eff,error;
+ const void __user *buff;
+ int size;
+
+ lock_sock(sk);
+ if (sock->state != SS_CONNECTED) {
+ error = -ENOTCONN;
+ goto out;
+ }
+ if (m->msg_name) {
+ error = -EISCONN;
+ goto out;
+ }
+ if (m->msg_iovlen != 1) {
+ error = -ENOSYS; /* fix this later @@@ */
+ goto out;
+ }
+ buff = m->msg_iov->iov_base;
+ size = m->msg_iov->iov_len;
+ vcc = ATM_SD(sock);
+ if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &vcc->flags) ||
+ !test_bit(ATM_VF_READY, &vcc->flags)) {
+ error = -EPIPE;
+ send_sig(SIGPIPE, current, 0);
+ goto out;
+ }
+ if (!size) {
+ error = 0;
+ goto out;
+ }
+ if (size < 0 || size > vcc->qos.txtp.max_sdu) {
+ error = -EMSGSIZE;
+ goto out;
+ }
+ /* verify_area is done by net/socket.c */
+ eff = (size+3) & ~3; /* align to word boundary */
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ error = 0;
+ while (!(skb = alloc_tx(vcc,eff))) {
+ if (m->msg_flags & MSG_DONTWAIT) {
+ error = -EAGAIN;
+ break;
+ }
+ schedule();
+ if (signal_pending(current)) {
+ error = -ERESTARTSYS;
+ break;
+ }
+ if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
+ test_bit(ATM_VF_CLOSE,&vcc->flags) ||
+ !test_bit(ATM_VF_READY,&vcc->flags)) {
+ error = -EPIPE;
+ send_sig(SIGPIPE, current, 0);
+ break;
+ }
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (error)
+ goto out;
+ skb->dev = NULL; /* for paths shared with net_device interfaces */
+ ATM_SKB(skb)->atm_options = vcc->atm_options;
+ if (copy_from_user(skb_put(skb,size),buff,size)) {
+ kfree_skb(skb);
+ error = -EFAULT;
+ goto out;
+ }
+ if (eff != size) memset(skb->data+size,0,eff-size);
+ error = vcc->dev->ops->send(vcc,skb);
+ error = error ? error : size;
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc;
+ unsigned int mask;
+
+ poll_wait(file, sk->sk_sleep, wait);
+ mask = 0;
+
+ vcc = ATM_SD(sock);
+
+ /* exceptional events */
+ if (sk->sk_err)
+ mask = POLLERR;
+
+ if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &vcc->flags))
+ mask |= POLLHUP;
+
+ /* readable? */
+ if (!skb_queue_empty(&sk->sk_receive_queue))
+ mask |= POLLIN | POLLRDNORM;
+
+ /* writable? */
+ if (sock->state == SS_CONNECTING &&
+ test_bit(ATM_VF_WAITING, &vcc->flags))
+ return mask;
+
+ if (vcc->qos.txtp.traffic_class != ATM_NONE &&
+ vcc_writable(sk))
+ mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
+
+ return mask;
+}
+
+
+static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
+{
+ int error;
+
+ /*
+ * Don't let the QoS change the already connected AAL type nor the
+ * traffic class.
+ */
+ if (qos->aal != vcc->qos.aal ||
+ qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class ||
+ qos->txtp.traffic_class != vcc->qos.txtp.traffic_class)
+ return -EINVAL;
+ error = adjust_tp(&qos->txtp,qos->aal);
+ if (!error) error = adjust_tp(&qos->rxtp,qos->aal);
+ if (error) return error;
+ if (!vcc->dev->ops->change_qos) return -EOPNOTSUPP;
+ if (sk_atm(vcc)->sk_family == AF_ATMPVC)
+ return vcc->dev->ops->change_qos(vcc,qos,ATM_MF_SET);
+ return svc_change_qos(vcc,qos);
+}
+
+
+static int check_tp(struct atm_trafprm *tp)
+{
+ /* @@@ Should be merged with adjust_tp */
+ if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0;
+ if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr &&
+ !tp->max_pcr) return -EINVAL;
+ if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL;
+ if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR &&
+ tp->min_pcr > tp->max_pcr) return -EINVAL;
+ /*
+ * We allow pcr to be outside [min_pcr,max_pcr], because later
+ * adjustment may still push it in the valid range.
+ */
+ return 0;
+}
+
+
+static int check_qos(struct atm_qos *qos)
+{
+ int error;
+
+ if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class)
+ return -EINVAL;
+ if (qos->txtp.traffic_class != qos->rxtp.traffic_class &&
+ qos->txtp.traffic_class && qos->rxtp.traffic_class &&
+ qos->txtp.traffic_class != ATM_ANYCLASS &&
+ qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL;
+ error = check_tp(&qos->txtp);
+ if (error) return error;
+ return check_tp(&qos->rxtp);
+}
+
+int vcc_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
+{
+ struct atm_vcc *vcc;
+ unsigned long value;
+ int error;
+
+ if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
+ return -EINVAL;
+
+ vcc = ATM_SD(sock);
+ switch (optname) {
+ case SO_ATMQOS:
+ {
+ struct atm_qos qos;
+
+ if (copy_from_user(&qos,optval,sizeof(qos)))
+ return -EFAULT;
+ error = check_qos(&qos);
+ if (error) return error;
+ if (sock->state == SS_CONNECTED)
+ return atm_change_qos(vcc,&qos);
+ if (sock->state != SS_UNCONNECTED)
+ return -EBADFD;
+ vcc->qos = qos;
+ set_bit(ATM_VF_HASQOS,&vcc->flags);
+ return 0;
+ }
+ case SO_SETCLP:
+ if (get_user(value,(unsigned long __user *)optval))
+ return -EFAULT;
+ if (value) vcc->atm_options |= ATM_ATMOPT_CLP;
+ else vcc->atm_options &= ~ATM_ATMOPT_CLP;
+ return 0;
+ default:
+ if (level == SOL_SOCKET) return -EINVAL;
+ break;
+ }
+ if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL;
+ return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen);
+}
+
+
+int vcc_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct atm_vcc *vcc;
+ int len;
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+ if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
+ return -EINVAL;
+
+ vcc = ATM_SD(sock);
+ switch (optname) {
+ case SO_ATMQOS:
+ if (!test_bit(ATM_VF_HASQOS,&vcc->flags))
+ return -EINVAL;
+ return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ?
+ -EFAULT : 0;
+ case SO_SETCLP:
+ return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 :
+ 0,(unsigned long __user *)optval) ? -EFAULT : 0;
+ case SO_ATMPVC:
+ {
+ struct sockaddr_atmpvc pvc;
+
+ if (!vcc->dev ||
+ !test_bit(ATM_VF_ADDR,&vcc->flags))
+ return -ENOTCONN;
+ pvc.sap_family = AF_ATMPVC;
+ pvc.sap_addr.itf = vcc->dev->number;
+ pvc.sap_addr.vpi = vcc->vpi;
+ pvc.sap_addr.vci = vcc->vci;
+ return copy_to_user(optval,&pvc,sizeof(pvc)) ?
+ -EFAULT : 0;
+ }
+ default:
+ if (level == SOL_SOCKET) return -EINVAL;
+ break;
+ }
+ if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL;
+ return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len);
+}
+
+static int __init atm_init(void)
+{
+ int error;
+
+ if ((error = proto_register(&vcc_proto, 0)) < 0)
+ goto out;
+
+ if ((error = atmpvc_init()) < 0) {
+ printk(KERN_ERR "atmpvc_init() failed with %d\n", error);
+ goto out_unregister_vcc_proto;
+ }
+ if ((error = atmsvc_init()) < 0) {
+ printk(KERN_ERR "atmsvc_init() failed with %d\n", error);
+ goto out_atmpvc_exit;
+ }
+ if ((error = atm_proc_init()) < 0) {
+ printk(KERN_ERR "atm_proc_init() failed with %d\n",error);
+ goto out_atmsvc_exit;
+ }
+out:
+ return error;
+out_atmsvc_exit:
+ atmsvc_exit();
+out_atmpvc_exit:
+ atmsvc_exit();
+out_unregister_vcc_proto:
+ proto_unregister(&vcc_proto);
+ goto out;
+}
+
+static void __exit atm_exit(void)
+{
+ atm_proc_exit();
+ atmsvc_exit();
+ atmpvc_exit();
+ proto_unregister(&vcc_proto);
+}
+
+module_init(atm_init);
+module_exit(atm_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NETPROTO(PF_ATMPVC);
+MODULE_ALIAS_NETPROTO(PF_ATMSVC);