common.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:30k
- /* 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 net_proto, struct
- proto_ops */
- #include <linux/atm.h> /* ATM stuff */
- #include <linux/atmdev.h>
- #include <linux/atmclip.h> /* CLIP_*ENCAP */
- #include <linux/atmarp.h> /* manifest constants */
- #include <linux/sonet.h> /* for ioctls */
- #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 <net/sock.h> /* struct sock */
- #include <asm/uaccess.h>
- #include <asm/atomic.h>
- #include <asm/poll.h>
- #include <asm/ioctls.h>
- #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
- #include <linux/atmlec.h>
- #include "lec.h"
- #include "lec_arpc.h"
- struct atm_lane_ops atm_lane_ops;
- #endif
- #ifdef CONFIG_ATM_LANE_MODULE
- EXPORT_SYMBOL(atm_lane_ops);
- #endif
- #if defined(CONFIG_ATM_MPOA) || defined(CONFIG_ATM_MPOA_MODULE)
- #include <linux/atmmpc.h>
- #include "mpc.h"
- struct atm_mpoa_ops atm_mpoa_ops;
- #endif
- #ifdef CONFIG_ATM_MPOA_MODULE
- EXPORT_SYMBOL(atm_mpoa_ops);
- #ifndef CONFIG_ATM_LANE_MODULE
- EXPORT_SYMBOL(atm_lane_ops);
- #endif
- #endif
- #if defined(CONFIG_ATM_TCP) || defined(CONFIG_ATM_TCP_MODULE)
- #include <linux/atm_tcp.h>
- #ifdef CONFIG_ATM_TCP_MODULE
- struct atm_tcp_ops atm_tcp_ops;
- EXPORT_SYMBOL(atm_tcp_ops);
- #endif
- #endif
- #if defined(CONFIG_PPPOATM) || defined(CONFIG_PPPOATM_MODULE)
- int (*pppoatm_ioctl_hook)(struct atm_vcc *, unsigned int, unsigned long);
- EXPORT_SYMBOL(pppoatm_ioctl_hook);
- #endif
- #include "resources.h" /* atm_find_dev */
- #include "common.h" /* prototypes */
- #include "protocols.h" /* atm_init_<transport> */
- #include "addr.h" /* address registry */
- #ifdef CONFIG_ATM_CLIP
- #include <net/atmclip.h> /* for clip_create */
- #endif
- #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
- spinlock_t atm_dev_lock = SPIN_LOCK_UNLOCKED;
- static struct sk_buff *alloc_tx(struct atm_vcc *vcc,unsigned int size)
- {
- struct sk_buff *skb;
- if (atomic_read(&vcc->tx_inuse) && !atm_may_send(vcc,size)) {
- DPRINTK("Sorry: tx_inuse = %d, size = %d, sndbuf = %dn",
- atomic_read(&vcc->tx_inuse),size,vcc->sk->sndbuf);
- return NULL;
- }
- while (!(skb = alloc_skb(size,GFP_KERNEL))) schedule();
- DPRINTK("AlTx %d += %dn",atomic_read(&vcc->tx_inuse),skb->truesize);
- atomic_add(skb->truesize+ATM_PDU_OVHD,&vcc->tx_inuse);
- return skb;
- }
- int atm_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;
- if (!(sk = alloc_atm_vcc_sk(family))) return -ENOMEM;
- vcc = sk->protinfo.af_atm;
- memset(&vcc->flags,0,sizeof(vcc->flags));
- vcc->dev = NULL;
- vcc->family = sock->ops->family;
- vcc->alloc_tx = alloc_tx;
- vcc->callback = 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(&vcc->tx_inuse,0);
- atomic_set(&vcc->rx_inuse,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;
- vcc->timestamp.tv_sec = vcc->timestamp.tv_usec = 0;
- init_waitqueue_head(&vcc->sleep);
- skb_queue_head_init(&vcc->recvq);
- skb_queue_head_init(&vcc->listenq);
- sk->sleep = &vcc->sleep;
- sock->sk = sk;
- return 0;
- }
- void atm_release_vcc_sk(struct sock *sk,int free_sk)
- {
- struct atm_vcc *vcc;
- struct sk_buff *skb;
- vcc = sk->protinfo.af_atm;
- 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(&vcc->recvq))) {
- atm_return(vcc,skb->truesize);
- if (vcc->dev->ops->free_rx_skb)
- vcc->dev->ops->free_rx_skb(vcc,skb);
- else kfree_skb(skb);
- }
- spin_lock (&atm_dev_lock);
- fops_put (vcc->dev->ops);
- if (atomic_read(&vcc->rx_inuse))
- printk(KERN_WARNING "atm_release_vcc: strange ... "
- "rx_inuse == %d after closingn",
- atomic_read(&vcc->rx_inuse));
- bind_vcc(vcc,NULL);
- } else
- spin_lock (&atm_dev_lock);
- if (free_sk) free_atm_vcc_sk(sk);
- spin_unlock (&atm_dev_lock);
- }
- int atm_release(struct socket *sock)
- {
- if (sock->sk)
- atm_release_vcc_sk(sock->sk,1);
- return 0;
- }
- void atm_async_release_vcc(struct atm_vcc *vcc,int reply)
- {
- set_bit(ATM_VF_CLOSE,&vcc->flags);
- vcc->reply = reply;
- wake_up(&vcc->sleep);
- }
- EXPORT_SYMBOL(atm_async_release_vcc);
- 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 atm_do_connect_dev(struct atm_vcc *vcc,struct atm_dev *dev,int vpi,
- int vci)
- {
- 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;
- bind_vcc(vcc,dev);
- 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) {
- bind_vcc(vcc,NULL);
- return error;
- }
- DPRINTK("VCC %d.%d, AAL %dn",vpi,vci,vcc->qos.aal);
- DPRINTK(" TX: %d, PCR %d..%d, SDU %dn",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 %dn",vcc->qos.rxtp.traffic_class,
- vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu);
- fops_get (dev->ops);
- if (dev->ops->open) {
- error = dev->ops->open(vcc,vpi,vci);
- if (error) {
- fops_put (dev->ops);
- bind_vcc(vcc,NULL);
- return error;
- }
- }
- return 0;
- }
- static int atm_do_connect(struct atm_vcc *vcc,int itf,int vpi,int vci)
- {
- struct atm_dev *dev;
- int return_val;
- spin_lock (&atm_dev_lock);
- dev = atm_find_dev(itf);
- if (!dev)
- return_val = -ENODEV;
- else
- return_val = atm_do_connect_dev(vcc,dev,vpi,vci);
- spin_unlock (&atm_dev_lock);
- return return_val;
- }
- int atm_connect_vcc(struct atm_vcc *vcc,int itf,short vpi,int vci)
- {
- 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;
- printk(KERN_DEBUG "atm_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) {
- int error;
- error = atm_do_connect(vcc,itf,vpi,vci);
- if (error) return error;
- }
- else {
- struct atm_dev *dev;
- spin_lock (&atm_dev_lock);
- for (dev = atm_devs; dev; dev = dev->next)
- if (!atm_do_connect_dev(vcc,dev,vpi,vci)) break;
- 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);
- return 0;
- }
- int atm_connect(struct socket *sock,int itf,short vpi,int vci)
- {
- int error;
- DPRINTK("atm_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;
- error = atm_connect_vcc(ATM_SD(sock),itf,vpi,vci);
- if (error) return error;
- if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags))
- sock->state = SS_CONNECTED;
- return 0;
- }
- int atm_recvmsg(struct socket *sock,struct msghdr *m,int total_len,
- int flags,struct scm_cookie *scm)
- {
- DECLARE_WAITQUEUE(wait,current);
- struct atm_vcc *vcc;
- struct sk_buff *skb;
- int eff_len,error;
- void *buff;
- int size;
- if (sock->state != SS_CONNECTED) return -ENOTCONN;
- if (flags & ~MSG_DONTWAIT) return -EOPNOTSUPP;
- if (m->msg_iovlen != 1) return -ENOSYS; /* fix this later @@@ */
- buff = m->msg_iov->iov_base;
- size = m->msg_iov->iov_len;
- vcc = ATM_SD(sock);
- add_wait_queue(&vcc->sleep,&wait);
- set_current_state(TASK_INTERRUPTIBLE);
- error = 1; /* <= 0 is error */
- while (!(skb = skb_dequeue(&vcc->recvq))) {
- if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
- test_bit(ATM_VF_CLOSE,&vcc->flags)) {
- error = vcc->reply;
- break;
- }
- if (!test_bit(ATM_VF_READY,&vcc->flags)) {
- error = 0;
- break;
- }
- if (flags & MSG_DONTWAIT) {
- error = -EAGAIN;
- break;
- }
- schedule();
- set_current_state(TASK_INTERRUPTIBLE);
- if (signal_pending(current)) {
- error = -ERESTARTSYS;
- break;
- }
- }
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&vcc->sleep,&wait);
- if (error <= 0) return error;
- vcc->timestamp = skb->stamp;
- eff_len = skb->len > size ? size : skb->len;
- if (skb->len > size) /* Not fit ? Report it... */
- m->msg_flags |= MSG_TRUNC;
- if (vcc->dev->ops->feedback)
- vcc->dev->ops->feedback(vcc,skb,(unsigned long) skb->data,
- (unsigned long) buff,eff_len);
- DPRINTK("RcvM %d -= %dn",atomic_read(&vcc->rx_inuse),skb->truesize);
- atm_return(vcc,skb->truesize);
- if (ATM_SKB(skb)->iovcnt) { /* @@@ hack */
- /* iovcnt set, use scatter-gather for receive */
- int el, cnt;
- struct iovec *iov = (struct iovec *)skb->data;
- unsigned char *p = (unsigned char *)buff;
- el = eff_len;
- error = 0;
- for (cnt = 0; (cnt < ATM_SKB(skb)->iovcnt) && el; cnt++) {
- /*printk("s-g???: %p -> %p (%d)n",iov->iov_base,p,iov->iov_len);*/
- error = copy_to_user(p,iov->iov_base,
- (iov->iov_len > el) ? el : iov->iov_len) ?
- -EFAULT : 0;
- if (error) break;
- p += iov->iov_len;
- el -= (iov->iov_len > el)?el:iov->iov_len;
- iov++;
- }
- if (!vcc->dev->ops->free_rx_skb) kfree_skb(skb);
- else vcc->dev->ops->free_rx_skb(vcc, skb);
- return error ? error : eff_len;
- }
- error = copy_to_user(buff,skb->data,eff_len) ? -EFAULT : 0;
- if (!vcc->dev->ops->free_rx_skb) kfree_skb(skb);
- else vcc->dev->ops->free_rx_skb(vcc, skb);
- return error ? error : eff_len;
- }
- int atm_sendmsg(struct socket *sock,struct msghdr *m,int total_len,
- struct scm_cookie *scm)
- {
- DECLARE_WAITQUEUE(wait,current);
- struct atm_vcc *vcc;
- struct sk_buff *skb;
- int eff,error;
- const void *buff;
- int size;
- if (sock->state != SS_CONNECTED) return -ENOTCONN;
- if (m->msg_name) return -EISCONN;
- if (m->msg_iovlen != 1) return -ENOSYS; /* fix this later @@@ */
- 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))
- return vcc->reply;
- if (!test_bit(ATM_VF_READY,&vcc->flags)) return -EPIPE;
- if (!size) return 0;
- if (size < 0 || size > vcc->qos.txtp.max_sdu) return -EMSGSIZE;
- /* verify_area is done by net/socket.c */
- eff = (size+3) & ~3; /* align to word boundary */
- add_wait_queue(&vcc->sleep,&wait);
- set_current_state(TASK_INTERRUPTIBLE);
- error = 0;
- while (!(skb = vcc->alloc_tx(vcc,eff))) {
- if (m->msg_flags & MSG_DONTWAIT) {
- error = -EAGAIN;
- break;
- }
- schedule();
- set_current_state(TASK_INTERRUPTIBLE);
- if (signal_pending(current)) {
- error = -ERESTARTSYS;
- break;
- }
- if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
- test_bit(ATM_VF_CLOSE,&vcc->flags)) {
- error = vcc->reply;
- break;
- }
- if (!test_bit(ATM_VF_READY,&vcc->flags)) {
- error = -EPIPE;
- break;
- }
- }
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&vcc->sleep,&wait);
- if (error) return error;
- skb->dev = NULL; /* for paths shared with net_device interfaces */
- ATM_SKB(skb)->iovcnt = 0;
- ATM_SKB(skb)->atm_options = vcc->atm_options;
- if (copy_from_user(skb_put(skb,size),buff,size)) {
- kfree_skb(skb);
- return -EFAULT;
- }
- if (eff != size) memset(skb->data+size,0,eff-size);
- error = vcc->dev->ops->send(vcc,skb);
- return error ? error : size;
- }
- unsigned int atm_poll(struct file *file,struct socket *sock,poll_table *wait)
- {
- struct atm_vcc *vcc;
- unsigned int mask;
- vcc = ATM_SD(sock);
- poll_wait(file,&vcc->sleep,wait);
- mask = 0;
- if (skb_peek(&vcc->recvq) || skb_peek(&vcc->listenq))
- mask |= POLLIN | POLLRDNORM;
- if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
- test_bit(ATM_VF_CLOSE,&vcc->flags))
- mask |= POLLHUP;
- if (sock->state != SS_CONNECTING) {
- if (vcc->qos.txtp.traffic_class != ATM_NONE &&
- vcc->qos.txtp.max_sdu+atomic_read(&vcc->tx_inuse)+
- ATM_PDU_OVHD <= vcc->sk->sndbuf)
- mask |= POLLOUT | POLLWRNORM;
- }
- else if (vcc->reply != WAITING) {
- mask |= POLLOUT | POLLWRNORM;
- if (vcc->reply) mask |= POLLERR;
- }
- return mask;
- }
- static void copy_aal_stats(struct k_atm_aal_stats *from,
- struct atm_aal_stats *to)
- {
- #define __HANDLE_ITEM(i) to->i = atomic_read(&from->i)
- __AAL_STAT_ITEMS
- #undef __HANDLE_ITEM
- }
- static void subtract_aal_stats(struct k_atm_aal_stats *from,
- struct atm_aal_stats *to)
- {
- #define __HANDLE_ITEM(i) atomic_sub(to->i,&from->i)
- __AAL_STAT_ITEMS
- #undef __HANDLE_ITEM
- }
- static int fetch_stats(struct atm_dev *dev,struct atm_dev_stats *arg,int zero)
- {
- struct atm_dev_stats tmp;
- int error = 0;
- copy_aal_stats(&dev->stats.aal0,&tmp.aal0);
- copy_aal_stats(&dev->stats.aal34,&tmp.aal34);
- copy_aal_stats(&dev->stats.aal5,&tmp.aal5);
- if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
- if (zero && !error) {
- subtract_aal_stats(&dev->stats.aal0,&tmp.aal0);
- subtract_aal_stats(&dev->stats.aal34,&tmp.aal34);
- subtract_aal_stats(&dev->stats.aal5,&tmp.aal5);
- }
- return error ? -EFAULT : 0;
- }
- int atm_ioctl(struct socket *sock,unsigned int cmd,unsigned long arg)
- {
- struct atm_dev *dev;
- struct atm_vcc *vcc;
- int *tmp_buf, *tmp_p;
- void *buf;
- int error,len,size,number, ret_val;
- ret_val = 0;
- spin_lock (&atm_dev_lock);
- vcc = ATM_SD(sock);
- switch (cmd) {
- case SIOCOUTQ:
- if (sock->state != SS_CONNECTED ||
- !test_bit(ATM_VF_READY,&vcc->flags)) {
- ret_val = -EINVAL;
- goto done;
- }
- ret_val = put_user(vcc->sk->sndbuf-
- atomic_read(&vcc->tx_inuse)-ATM_PDU_OVHD,
- (int *) arg) ? -EFAULT : 0;
- goto done;
- case SIOCINQ:
- {
- struct sk_buff *skb;
- if (sock->state != SS_CONNECTED) {
- ret_val = -EINVAL;
- goto done;
- }
- skb = skb_peek(&vcc->recvq);
- ret_val = put_user(skb ? skb->len : 0,(int *) arg)
- ? -EFAULT : 0;
- goto done;
- }
- case ATM_GETNAMES:
- if (get_user(buf,
- &((struct atm_iobuf *) arg)->buffer)) {
- ret_val = -EFAULT;
- goto done;
- }
- if (get_user(len,
- &((struct atm_iobuf *) arg)->length)) {
- ret_val = -EFAULT;
- goto done;
- }
- size = 0;
- for (dev = atm_devs; dev; dev = dev->next)
- size += sizeof(int);
- if (size > len) {
- ret_val = -E2BIG;
- goto done;
- }
- tmp_buf = kmalloc(size,GFP_KERNEL);
- if (!tmp_buf) {
- ret_val = -ENOMEM;
- goto done;
- }
- tmp_p = tmp_buf;
- for (dev = atm_devs; dev; dev = dev->next)
- *tmp_p++ = dev->number;
- ret_val = ((copy_to_user(buf, tmp_buf, size)) ||
- put_user(size, &((struct atm_iobuf *) arg)->length)
- ) ? -EFAULT : 0;
- kfree(tmp_buf);
- goto done;
- case SIOCGSTAMP: /* borrowed from IP */
- if (!vcc->timestamp.tv_sec) {
- ret_val = -ENOENT;
- goto done;
- }
- vcc->timestamp.tv_sec += vcc->timestamp.tv_usec/1000000;
- vcc->timestamp.tv_usec %= 1000000;
- ret_val = copy_to_user((void *) arg,&vcc->timestamp,
- sizeof(struct timeval)) ? -EFAULT : 0;
- goto done;
- case ATM_SETSC:
- printk(KERN_WARNING "ATM_SETSC is obsoleten");
- ret_val = 0;
- goto done;
- case ATMSIGD_CTRL:
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- /*
- * The user/kernel protocol for exchanging signalling
- * info uses kernel pointers as opaque references,
- * so the holder of the file descriptor can scribble
- * on the kernel... so we should make sure that we
- * have the same privledges that /proc/kcore needs
- */
- if (!capable(CAP_SYS_RAWIO)) {
- ret_val = -EPERM;
- goto done;
- }
- error = sigd_attach(vcc);
- if (!error) sock->state = SS_CONNECTED;
- ret_val = error;
- goto done;
- #ifdef CONFIG_ATM_CLIP
- case SIOCMKCLIP:
- if (!capable(CAP_NET_ADMIN))
- ret_val = -EPERM;
- else
- ret_val = clip_create(arg);
- goto done;
- case ATMARPD_CTRL:
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- error = atm_init_atmarp(vcc);
- if (!error) sock->state = SS_CONNECTED;
- ret_val = error;
- goto done;
- case ATMARP_MKIP:
- if (!capable(CAP_NET_ADMIN))
- ret_val = -EPERM;
- else
- ret_val = clip_mkip(vcc,arg);
- goto done;
- case ATMARP_SETENTRY:
- if (!capable(CAP_NET_ADMIN))
- ret_val = -EPERM;
- else
- ret_val = clip_setentry(vcc,arg);
- goto done;
- case ATMARP_ENCAP:
- if (!capable(CAP_NET_ADMIN))
- ret_val = -EPERM;
- else
- ret_val = clip_encap(vcc,arg);
- goto done;
- #endif
- #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
- case ATMLEC_CTRL:
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- if (atm_lane_ops.lecd_attach == NULL)
- atm_lane_init();
- if (atm_lane_ops.lecd_attach == NULL) { /* try again */
- ret_val = -ENOSYS;
- goto done;
- }
- error = atm_lane_ops.lecd_attach(vcc, (int)arg);
- if (error >= 0) sock->state = SS_CONNECTED;
- ret_val = error;
- goto done;
- case ATMLEC_MCAST:
- if (!capable(CAP_NET_ADMIN))
- ret_val = -EPERM;
- else
- ret_val = atm_lane_ops.mcast_attach(vcc, (int)arg);
- goto done;
- case ATMLEC_DATA:
- if (!capable(CAP_NET_ADMIN))
- ret_val = -EPERM;
- else
- ret_val = atm_lane_ops.vcc_attach(vcc, (void*)arg);
- goto done;
- #endif
- #if defined(CONFIG_ATM_MPOA) || defined(CONFIG_ATM_MPOA_MODULE)
- case ATMMPC_CTRL:
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- if (atm_mpoa_ops.mpoad_attach == NULL)
- atm_mpoa_init();
- if (atm_mpoa_ops.mpoad_attach == NULL) { /* try again */
- ret_val = -ENOSYS;
- goto done;
- }
- error = atm_mpoa_ops.mpoad_attach(vcc, (int)arg);
- if (error >= 0) sock->state = SS_CONNECTED;
- ret_val = error;
- goto done;
- case ATMMPC_DATA:
- if (!capable(CAP_NET_ADMIN))
- ret_val = -EPERM;
- else
- ret_val = atm_mpoa_ops.vcc_attach(vcc, arg);
- goto done;
- #endif
- #if defined(CONFIG_ATM_TCP) || defined(CONFIG_ATM_TCP_MODULE)
- case SIOCSIFATMTCP:
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- if (!atm_tcp_ops.attach) {
- ret_val = -ENOPKG;
- goto done;
- }
- fops_get (&atm_tcp_ops);
- error = atm_tcp_ops.attach(vcc,(int) arg);
- if (error >= 0) sock->state = SS_CONNECTED;
- else fops_put (&atm_tcp_ops);
- ret_val = error;
- goto done;
- case ATMTCP_CREATE:
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- if (!atm_tcp_ops.create_persistent) {
- ret_val = -ENOPKG;
- goto done;
- }
- error = atm_tcp_ops.create_persistent((int) arg);
- if (error < 0) fops_put (&atm_tcp_ops);
- ret_val = error;
- goto done;
- case ATMTCP_REMOVE:
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- if (!atm_tcp_ops.remove_persistent) {
- ret_val = -ENOPKG;
- goto done;
- }
- error = atm_tcp_ops.remove_persistent((int) arg);
- fops_put (&atm_tcp_ops);
- ret_val = error;
- goto done;
- #endif
- default:
- break;
- }
- #if defined(CONFIG_PPPOATM) || defined(CONFIG_PPPOATM_MODULE)
- if (pppoatm_ioctl_hook) {
- ret_val = pppoatm_ioctl_hook(vcc, cmd, arg);
- if (ret_val != -ENOIOCTLCMD)
- goto done;
- }
- #endif
- if (get_user(buf,&((struct atmif_sioc *) arg)->arg)) {
- ret_val = -EFAULT;
- goto done;
- }
- if (get_user(len,&((struct atmif_sioc *) arg)->length)) {
- ret_val = -EFAULT;
- goto done;
- }
- if (get_user(number,&((struct atmif_sioc *) arg)->number)) {
- ret_val = -EFAULT;
- goto done;
- }
- if (!(dev = atm_find_dev(number))) {
- ret_val = -ENODEV;
- goto done;
- }
-
- size = 0;
- switch (cmd) {
- case ATM_GETTYPE:
- size = strlen(dev->type)+1;
- if (copy_to_user(buf,dev->type,size)) {
- ret_val = -EFAULT;
- goto done;
- }
- break;
- case ATM_GETESI:
- size = ESI_LEN;
- if (copy_to_user(buf,dev->esi,size)) {
- ret_val = -EFAULT;
- goto done;
- }
- break;
- case ATM_SETESI:
- {
- int i;
- for (i = 0; i < ESI_LEN; i++)
- if (dev->esi[i]) {
- ret_val = -EEXIST;
- goto done;
- }
- }
- /* fall through */
- case ATM_SETESIF:
- {
- unsigned char esi[ESI_LEN];
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- if (copy_from_user(esi,buf,ESI_LEN)) {
- ret_val = -EFAULT;
- goto done;
- }
- memcpy(dev->esi,esi,ESI_LEN);
- ret_val = ESI_LEN;
- goto done;
- }
- case ATM_GETSTATZ:
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- /* fall through */
- case ATM_GETSTAT:
- size = sizeof(struct atm_dev_stats);
- error = fetch_stats(dev,buf,cmd == ATM_GETSTATZ);
- if (error) {
- ret_val = error;
- goto done;
- }
- break;
- case ATM_GETCIRANGE:
- size = sizeof(struct atm_cirange);
- if (copy_to_user(buf,&dev->ci_range,size)) {
- ret_val = -EFAULT;
- goto done;
- }
- break;
- case ATM_GETLINKRATE:
- size = sizeof(int);
- if (copy_to_user(buf,&dev->link_rate,size)) {
- ret_val = -EFAULT;
- goto done;
- }
- break;
- case ATM_RSTADDR:
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- atm_reset_addr(dev);
- break;
- case ATM_ADDADDR:
- case ATM_DELADDR:
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- {
- struct sockaddr_atmsvc addr;
- if (copy_from_user(&addr,buf,sizeof(addr))) {
- ret_val = -EFAULT;
- goto done;
- }
- if (cmd == ATM_ADDADDR)
- ret_val = atm_add_addr(dev,&addr);
- else
- ret_val = atm_del_addr(dev,&addr);
- goto done;
- }
- case ATM_GETADDR:
- size = atm_get_addr(dev,buf,len);
- if (size < 0)
- ret_val = size;
- else
- /* may return 0, but later on size == 0 means "don't
- write the length" */
- ret_val = put_user(size,
- &((struct atmif_sioc *) arg)->length) ? -EFAULT : 0;
- goto done;
- case ATM_SETLOOP:
- if (__ATM_LM_XTRMT((int) (long) buf) &&
- __ATM_LM_XTLOC((int) (long) buf) >
- __ATM_LM_XTRMT((int) (long) buf)) {
- ret_val = -EINVAL;
- goto done;
- }
- /* fall through */
- case ATM_SETCIRANGE:
- case SONET_GETSTATZ:
- case SONET_SETDIAG:
- case SONET_CLRDIAG:
- case SONET_SETFRAMING:
- if (!capable(CAP_NET_ADMIN)) {
- ret_val = -EPERM;
- goto done;
- }
- /* fall through */
- default:
- if (!dev->ops->ioctl) {
- ret_val = -EINVAL;
- goto done;
- }
- size = dev->ops->ioctl(dev,cmd,buf);
- if (size < 0) {
- ret_val = (size == -ENOIOCTLCMD ? -EINVAL : size);
- goto done;
- }
- }
-
- if (size)
- ret_val = put_user(size,&((struct atmif_sioc *) arg)->length) ?
- -EFAULT : 0;
- else
- ret_val = 0;
- done:
- spin_unlock (&atm_dev_lock);
- return ret_val;
- }
- 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 (vcc->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);
- }
- static int atm_do_setsockopt(struct socket *sock,int level,int optname,
- void *optval,int optlen)
- {
- struct atm_vcc *vcc;
- unsigned long value;
- int error;
- 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 *) 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);
- }
- static int atm_do_getsockopt(struct socket *sock,int level,int optname,
- void *optval,int optlen)
- {
- struct atm_vcc *vcc;
- 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 *) 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,optlen);
- }
- int atm_setsockopt(struct socket *sock,int level,int optname,char *optval,
- int optlen)
- {
- if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
- return -EINVAL;
- return atm_do_setsockopt(sock,level,optname,optval,optlen);
- }
- int atm_getsockopt(struct socket *sock,int level,int optname,
- char *optval,int *optlen)
- {
- int len;
- if (get_user(len,optlen)) return -EFAULT;
- if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
- return -EINVAL;
- return atm_do_getsockopt(sock,level,optname,optval,len);
- }
- /*
- * lane_mpoa_init.c: A couple of helper functions
- * to make modular LANE and MPOA client easier to implement
- */
- /*
- * This is how it goes:
- *
- * if xxxx is not compiled as module, call atm_xxxx_init_ops()
- * from here
- * else call atm_mpoa_init_ops() from init_module() within
- * the kernel when xxxx module is loaded
- *
- * In either case function pointers in struct atm_xxxx_ops
- * are initialized to their correct values. Either they
- * point to functions in the module or in the kernel
- */
-
- extern struct atm_mpoa_ops atm_mpoa_ops; /* in common.c */
- extern struct atm_lane_ops atm_lane_ops; /* in common.c */
- #if defined(CONFIG_ATM_MPOA) || defined(CONFIG_ATM_MPOA_MODULE)
- void atm_mpoa_init(void)
- {
- #ifndef CONFIG_ATM_MPOA_MODULE /* not module */
- atm_mpoa_init_ops(&atm_mpoa_ops);
- #else
- request_module("mpoa");
- #endif
- return;
- }
- #endif
- #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
- #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
- struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
- unsigned char *addr) = NULL;
- void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent) = NULL;
- #if defined(CONFIG_ATM_LANE_MODULE) || defined(CONFIG_BRIDGE_MODULE)
- EXPORT_SYMBOL(br_fdb_get_hook);
- EXPORT_SYMBOL(br_fdb_put_hook);
- #endif /* defined(CONFIG_ATM_LANE_MODULE) || defined(CONFIG_BRIDGE_MODULE) */
- #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
- void atm_lane_init(void)
- {
- #ifndef CONFIG_ATM_LANE_MODULE /* not module */
- atm_lane_init_ops(&atm_lane_ops);
- #else
- request_module("lec");
- #endif
- return;
- }
- #endif