| /* net/atm/common.c - ATM sockets (common part for PVC and SVC) */ |
| |
| /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ |
| |
| |
| #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> |
| #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 */ |
| |
| 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_hash = 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 (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) { |
| pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n", |
| sk_wmem_alloc_get(sk), size, |
| sk->sk_sndbuf); |
| return NULL; |
| } |
| while (!(skb = alloc_skb(size, GFP_KERNEL))) |
| schedule(); |
| pr_debug("AlTx %d += %d\n", sk_wmem_alloc_get(sk), 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_has_sleeper(sk)) |
| 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_has_sleeper(sk)) |
| wake_up_interruptible(sk->sk_sleep); |
| |
| sk_wake_async(sk, SOCK_WAKE_SPACE, 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 net *net, 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(net, family, GFP_KERNEL, &vcc_proto); |
| 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, 1); |
| 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 */ |
| |
| 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); |
| } |
| |
| vcc_remove_socket(sk); |
| } |
| |
| |
| 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); |
| |
| |
| void atm_dev_release_vccs(struct atm_dev *dev) |
| { |
| int i; |
| |
| write_lock_irq(&vcc_sklist_lock); |
| for (i = 0; i < VCC_HTABLE_SIZE; i++) { |
| struct hlist_head *head = &vcc_hash[i]; |
| struct hlist_node *node, *tmp; |
| struct sock *s; |
| struct atm_vcc *vcc; |
| |
| sk_for_each_safe(s, node, tmp, head) { |
| vcc = atm_sk(s); |
| if (vcc->dev == dev) { |
| vcc_release_async(vcc, -EPIPE); |
| sk_del_node_init(s); |
| } |
| } |
| } |
| write_unlock_irq(&vcc_sklist_lock); |
| } |
| |
| |
| 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(const 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(const 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 = -ENODEV; |
| if (!try_module_get(dev->ops->owner)) |
| return error; |
| vcc->dev = dev; |
| write_lock_irq(&vcc_sklist_lock); |
| if (test_bit(ATM_DF_REMOVED, &dev->flags) || |
| (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; |
| pr_debug("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal); |
| pr_debug(" 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); |
| pr_debug(" 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; |
| |
| pr_debug("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; |
| pr_debug("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 (likely(itf != ATM_ITF_ANY)) { |
| dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf); |
| } else { |
| dev = NULL; |
| mutex_lock(&atm_dev_mutex); |
| if (!list_empty(&atm_devs)) { |
| dev = list_entry(atm_devs.next, struct atm_dev, dev_list); |
| atm_dev_hold(dev); |
| } |
| mutex_unlock(&atm_dev_mutex); |
| } |
| if (!dev) |
| return -ENODEV; |
| error = __vcc_connect(vcc, dev, vpi, vci); |
| if (error) { |
| atm_dev_put(dev); |
| return error; |
| } |
| 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); |
| pr_debug("RcvM %d -= %d\n", atomic_read(&sk->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; |
| } |
| |
| 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; |
| |
| sock_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(const 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(const 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, unsigned 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; |
| memset(&pvc, 0, sizeof(pvc)); |
| 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; |
| } |
| if ((error = atm_sysfs_init()) < 0) { |
| printk(KERN_ERR "atm_sysfs_init() failed with %d\n",error); |
| goto out_atmproc_exit; |
| } |
| out: |
| return error; |
| out_atmproc_exit: |
| atm_proc_exit(); |
| 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(); |
| atm_sysfs_exit(); |
| atmsvc_exit(); |
| atmpvc_exit(); |
| proto_unregister(&vcc_proto); |
| } |
| |
| subsys_initcall(atm_init); |
| |
| module_exit(atm_exit); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS_NETPROTO(PF_ATMPVC); |
| MODULE_ALIAS_NETPROTO(PF_ATMSVC); |