diff options
Diffstat (limited to 'net/atm/common.c')
| -rw-r--r-- | net/atm/common.c | 804 |
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); |