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![Erin MacNeil](/assets/img/avatar_default.png)
Adding a new socket option, SO_RCVMARK, to indicate that SO_MARK should be included in the ancillary data returned by recvmsg(). Renamed the sock_recv_ts_and_drops() function to sock_recv_cmsgs(). Signed-off-by: Erin MacNeil <lnx.erin@gmail.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> Link: https://lore.kernel.org/r/20220427200259.2564-1-lnx.erin@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
895 lines
21 KiB
C
895 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* net/atm/common.c - ATM sockets (common part for PVC and SVC) */
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
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#include <linux/module.h>
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#include <linux/kmod.h>
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#include <linux/net.h> /* struct socket, struct proto_ops */
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#include <linux/atm.h> /* ATM stuff */
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#include <linux/atmdev.h>
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#include <linux/socket.h> /* SOL_SOCKET */
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#include <linux/errno.h> /* error codes */
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#include <linux/capability.h>
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#include <linux/mm.h>
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#include <linux/sched/signal.h>
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#include <linux/time64.h> /* 64-bit time for seconds */
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#include <linux/skbuff.h>
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#include <linux/bitops.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <net/sock.h> /* struct sock */
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#include <linux/uaccess.h>
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#include <linux/poll.h>
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#include <linux/atomic.h>
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#include "resources.h" /* atm_find_dev */
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#include "common.h" /* prototypes */
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#include "protocols.h" /* atm_init_<transport> */
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#include "addr.h" /* address registry */
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#include "signaling.h" /* for WAITING and sigd_attach */
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struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
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EXPORT_SYMBOL(vcc_hash);
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DEFINE_RWLOCK(vcc_sklist_lock);
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EXPORT_SYMBOL(vcc_sklist_lock);
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static ATOMIC_NOTIFIER_HEAD(atm_dev_notify_chain);
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static void __vcc_insert_socket(struct sock *sk)
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{
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struct atm_vcc *vcc = atm_sk(sk);
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struct hlist_head *head = &vcc_hash[vcc->vci & (VCC_HTABLE_SIZE - 1)];
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sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1);
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sk_add_node(sk, head);
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}
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void vcc_insert_socket(struct sock *sk)
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{
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write_lock_irq(&vcc_sklist_lock);
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__vcc_insert_socket(sk);
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write_unlock_irq(&vcc_sklist_lock);
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}
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EXPORT_SYMBOL(vcc_insert_socket);
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static void vcc_remove_socket(struct sock *sk)
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{
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write_lock_irq(&vcc_sklist_lock);
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sk_del_node_init(sk);
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write_unlock_irq(&vcc_sklist_lock);
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}
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static bool vcc_tx_ready(struct atm_vcc *vcc, unsigned int size)
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{
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struct sock *sk = sk_atm(vcc);
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if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) {
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pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
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sk_wmem_alloc_get(sk), size, sk->sk_sndbuf);
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return false;
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}
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return true;
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}
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static void vcc_sock_destruct(struct sock *sk)
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{
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if (atomic_read(&sk->sk_rmem_alloc))
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printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n",
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__func__, atomic_read(&sk->sk_rmem_alloc));
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if (refcount_read(&sk->sk_wmem_alloc))
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printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n",
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__func__, refcount_read(&sk->sk_wmem_alloc));
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}
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static void vcc_def_wakeup(struct sock *sk)
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{
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struct socket_wq *wq;
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rcu_read_lock();
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wq = rcu_dereference(sk->sk_wq);
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if (skwq_has_sleeper(wq))
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wake_up(&wq->wait);
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rcu_read_unlock();
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}
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static inline int vcc_writable(struct sock *sk)
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{
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struct atm_vcc *vcc = atm_sk(sk);
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return (vcc->qos.txtp.max_sdu +
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refcount_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
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}
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static void vcc_write_space(struct sock *sk)
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{
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struct socket_wq *wq;
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rcu_read_lock();
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if (vcc_writable(sk)) {
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wq = rcu_dereference(sk->sk_wq);
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if (skwq_has_sleeper(wq))
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wake_up_interruptible(&wq->wait);
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sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
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}
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rcu_read_unlock();
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}
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static void vcc_release_cb(struct sock *sk)
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{
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struct atm_vcc *vcc = atm_sk(sk);
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if (vcc->release_cb)
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vcc->release_cb(vcc);
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}
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static struct proto vcc_proto = {
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.name = "VCC",
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.owner = THIS_MODULE,
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.obj_size = sizeof(struct atm_vcc),
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.release_cb = vcc_release_cb,
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};
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int vcc_create(struct net *net, struct socket *sock, int protocol, int family, int kern)
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{
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struct sock *sk;
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struct atm_vcc *vcc;
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sock->sk = NULL;
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if (sock->type == SOCK_STREAM)
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return -EINVAL;
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sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto, kern);
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if (!sk)
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return -ENOMEM;
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sock_init_data(sock, sk);
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sk->sk_state_change = vcc_def_wakeup;
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sk->sk_write_space = vcc_write_space;
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vcc = atm_sk(sk);
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vcc->dev = NULL;
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memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc));
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memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc));
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vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
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refcount_set(&sk->sk_wmem_alloc, 1);
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atomic_set(&sk->sk_rmem_alloc, 0);
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vcc->push = NULL;
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vcc->pop = NULL;
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vcc->owner = NULL;
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vcc->push_oam = NULL;
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vcc->release_cb = NULL;
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vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
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vcc->atm_options = vcc->aal_options = 0;
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sk->sk_destruct = vcc_sock_destruct;
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return 0;
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}
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static void vcc_destroy_socket(struct sock *sk)
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{
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struct atm_vcc *vcc = atm_sk(sk);
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struct sk_buff *skb;
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set_bit(ATM_VF_CLOSE, &vcc->flags);
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clear_bit(ATM_VF_READY, &vcc->flags);
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if (vcc->dev && vcc->dev->ops->close)
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vcc->dev->ops->close(vcc);
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if (vcc->push)
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vcc->push(vcc, NULL); /* atmarpd has no push */
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module_put(vcc->owner);
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while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
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atm_return(vcc, skb->truesize);
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kfree_skb(skb);
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}
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if (vcc->dev && vcc->dev->ops->owner) {
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module_put(vcc->dev->ops->owner);
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atm_dev_put(vcc->dev);
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}
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vcc_remove_socket(sk);
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}
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int vcc_release(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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if (sk) {
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lock_sock(sk);
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vcc_destroy_socket(sock->sk);
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release_sock(sk);
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sock_put(sk);
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}
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return 0;
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}
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void vcc_release_async(struct atm_vcc *vcc, int reply)
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{
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struct sock *sk = sk_atm(vcc);
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set_bit(ATM_VF_CLOSE, &vcc->flags);
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sk->sk_shutdown |= RCV_SHUTDOWN;
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sk->sk_err = -reply;
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clear_bit(ATM_VF_WAITING, &vcc->flags);
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sk->sk_state_change(sk);
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}
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EXPORT_SYMBOL(vcc_release_async);
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void vcc_process_recv_queue(struct atm_vcc *vcc)
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{
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struct sk_buff_head queue, *rq;
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struct sk_buff *skb, *tmp;
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unsigned long flags;
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__skb_queue_head_init(&queue);
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rq = &sk_atm(vcc)->sk_receive_queue;
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spin_lock_irqsave(&rq->lock, flags);
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skb_queue_splice_init(rq, &queue);
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spin_unlock_irqrestore(&rq->lock, flags);
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skb_queue_walk_safe(&queue, skb, tmp) {
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__skb_unlink(skb, &queue);
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vcc->push(vcc, skb);
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}
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}
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EXPORT_SYMBOL(vcc_process_recv_queue);
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void atm_dev_signal_change(struct atm_dev *dev, char signal)
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{
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pr_debug("%s signal=%d dev=%p number=%d dev->signal=%d\n",
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__func__, signal, dev, dev->number, dev->signal);
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/* atm driver sending invalid signal */
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WARN_ON(signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND);
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if (dev->signal == signal)
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return; /* no change */
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dev->signal = signal;
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atomic_notifier_call_chain(&atm_dev_notify_chain, signal, dev);
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}
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EXPORT_SYMBOL(atm_dev_signal_change);
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void atm_dev_release_vccs(struct atm_dev *dev)
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{
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int i;
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write_lock_irq(&vcc_sklist_lock);
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for (i = 0; i < VCC_HTABLE_SIZE; i++) {
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struct hlist_head *head = &vcc_hash[i];
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struct hlist_node *tmp;
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struct sock *s;
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struct atm_vcc *vcc;
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sk_for_each_safe(s, tmp, head) {
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vcc = atm_sk(s);
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if (vcc->dev == dev) {
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vcc_release_async(vcc, -EPIPE);
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sk_del_node_init(s);
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}
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}
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}
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write_unlock_irq(&vcc_sklist_lock);
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}
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EXPORT_SYMBOL(atm_dev_release_vccs);
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static int adjust_tp(struct atm_trafprm *tp, unsigned char aal)
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{
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int max_sdu;
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if (!tp->traffic_class)
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return 0;
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switch (aal) {
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case ATM_AAL0:
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max_sdu = ATM_CELL_SIZE-1;
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break;
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case ATM_AAL34:
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max_sdu = ATM_MAX_AAL34_PDU;
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break;
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default:
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pr_warn("AAL problems ... (%d)\n", aal);
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fallthrough;
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case ATM_AAL5:
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max_sdu = ATM_MAX_AAL5_PDU;
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}
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if (!tp->max_sdu)
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tp->max_sdu = max_sdu;
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else if (tp->max_sdu > max_sdu)
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return -EINVAL;
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if (!tp->max_cdv)
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tp->max_cdv = ATM_MAX_CDV;
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return 0;
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}
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static int check_ci(const struct atm_vcc *vcc, short vpi, int vci)
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{
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struct hlist_head *head = &vcc_hash[vci & (VCC_HTABLE_SIZE - 1)];
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struct sock *s;
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struct atm_vcc *walk;
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sk_for_each(s, head) {
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walk = atm_sk(s);
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if (walk->dev != vcc->dev)
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continue;
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if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
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walk->vci == vci && ((walk->qos.txtp.traffic_class !=
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ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
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(walk->qos.rxtp.traffic_class != ATM_NONE &&
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vcc->qos.rxtp.traffic_class != ATM_NONE)))
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return -EADDRINUSE;
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}
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/* allow VCCs with same VPI/VCI iff they don't collide on
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TX/RX (but we may refuse such sharing for other reasons,
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e.g. if protocol requires to have both channels) */
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return 0;
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}
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static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci)
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{
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static short p; /* poor man's per-device cache */
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static int c;
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short old_p;
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int old_c;
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int err;
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if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
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err = check_ci(vcc, *vpi, *vci);
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return err;
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}
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/* last scan may have left values out of bounds for current device */
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if (*vpi != ATM_VPI_ANY)
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p = *vpi;
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else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
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p = 0;
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if (*vci != ATM_VCI_ANY)
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c = *vci;
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else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
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c = ATM_NOT_RSV_VCI;
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old_p = p;
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old_c = c;
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do {
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if (!check_ci(vcc, p, c)) {
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*vpi = p;
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*vci = c;
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return 0;
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}
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if (*vci == ATM_VCI_ANY) {
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c++;
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if (c >= 1 << vcc->dev->ci_range.vci_bits)
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c = ATM_NOT_RSV_VCI;
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}
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if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
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*vpi == ATM_VPI_ANY) {
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p++;
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if (p >= 1 << vcc->dev->ci_range.vpi_bits)
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p = 0;
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}
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} while (old_p != p || old_c != c);
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return -EADDRINUSE;
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}
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static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
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int vci)
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{
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struct sock *sk = sk_atm(vcc);
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int error;
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if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY &&
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vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC &&
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vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits))
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return -EINVAL;
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if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
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return -EPERM;
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error = -ENODEV;
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if (!try_module_get(dev->ops->owner))
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return error;
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vcc->dev = dev;
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write_lock_irq(&vcc_sklist_lock);
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if (test_bit(ATM_DF_REMOVED, &dev->flags) ||
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(error = find_ci(vcc, &vpi, &vci))) {
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write_unlock_irq(&vcc_sklist_lock);
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goto fail_module_put;
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}
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vcc->vpi = vpi;
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vcc->vci = vci;
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__vcc_insert_socket(sk);
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write_unlock_irq(&vcc_sklist_lock);
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switch (vcc->qos.aal) {
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case ATM_AAL0:
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error = atm_init_aal0(vcc);
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vcc->stats = &dev->stats.aal0;
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break;
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case ATM_AAL34:
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error = atm_init_aal34(vcc);
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vcc->stats = &dev->stats.aal34;
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break;
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case ATM_NO_AAL:
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/* ATM_AAL5 is also used in the "0 for default" case */
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vcc->qos.aal = ATM_AAL5;
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fallthrough;
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case ATM_AAL5:
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error = atm_init_aal5(vcc);
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vcc->stats = &dev->stats.aal5;
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break;
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default:
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error = -EPROTOTYPE;
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}
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if (!error)
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error = adjust_tp(&vcc->qos.txtp, vcc->qos.aal);
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if (!error)
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error = adjust_tp(&vcc->qos.rxtp, vcc->qos.aal);
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if (error)
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goto fail;
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pr_debug("VCC %d.%d, AAL %d\n", vpi, vci, vcc->qos.aal);
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pr_debug(" TX: %d, PCR %d..%d, SDU %d\n",
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vcc->qos.txtp.traffic_class,
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vcc->qos.txtp.min_pcr,
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vcc->qos.txtp.max_pcr,
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vcc->qos.txtp.max_sdu);
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pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",
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vcc->qos.rxtp.traffic_class,
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vcc->qos.rxtp.min_pcr,
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vcc->qos.rxtp.max_pcr,
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vcc->qos.rxtp.max_sdu);
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if (dev->ops->open) {
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error = dev->ops->open(vcc);
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if (error)
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goto fail;
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}
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return 0;
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fail:
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vcc_remove_socket(sk);
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fail_module_put:
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module_put(dev->ops->owner);
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/* ensure we get dev module ref count correct */
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vcc->dev = NULL;
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return error;
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}
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int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
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{
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struct atm_dev *dev;
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struct atm_vcc *vcc = ATM_SD(sock);
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int error;
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|
|
pr_debug("(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("(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 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;
|
|
|
|
/* only handle MSG_DONTWAIT and MSG_PEEK */
|
|
if (flags & ~(MSG_DONTWAIT | MSG_PEEK))
|
|
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, &error);
|
|
if (!skb)
|
|
return error;
|
|
|
|
copied = skb->len;
|
|
if (copied > size) {
|
|
copied = size;
|
|
msg->msg_flags |= MSG_TRUNC;
|
|
}
|
|
|
|
error = skb_copy_datagram_msg(skb, 0, msg, copied);
|
|
if (error)
|
|
return error;
|
|
sock_recv_cmsgs(msg, sk, skb);
|
|
|
|
if (!(flags & MSG_PEEK)) {
|
|
pr_debug("%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 socket *sock, struct msghdr *m, size_t size)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
DEFINE_WAIT(wait);
|
|
struct atm_vcc *vcc;
|
|
struct sk_buff *skb;
|
|
int eff, error;
|
|
|
|
lock_sock(sk);
|
|
if (sock->state != SS_CONNECTED) {
|
|
error = -ENOTCONN;
|
|
goto out;
|
|
}
|
|
if (m->msg_name) {
|
|
error = -EISCONN;
|
|
goto out;
|
|
}
|
|
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 > vcc->qos.txtp.max_sdu) {
|
|
error = -EMSGSIZE;
|
|
goto out;
|
|
}
|
|
|
|
eff = (size+3) & ~3; /* align to word boundary */
|
|
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
|
|
error = 0;
|
|
while (!vcc_tx_ready(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_sleep(sk), &wait, TASK_INTERRUPTIBLE);
|
|
}
|
|
finish_wait(sk_sleep(sk), &wait);
|
|
if (error)
|
|
goto out;
|
|
|
|
skb = alloc_skb(eff, GFP_KERNEL);
|
|
if (!skb) {
|
|
error = -ENOMEM;
|
|
goto out;
|
|
}
|
|
pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize);
|
|
atm_account_tx(vcc, skb);
|
|
|
|
skb->dev = NULL; /* for paths shared with net_device interfaces */
|
|
if (!copy_from_iter_full(skb_put(skb, size), size, &m->msg_iter)) {
|
|
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;
|
|
}
|
|
|
|
__poll_t vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct atm_vcc *vcc;
|
|
__poll_t mask;
|
|
|
|
sock_poll_wait(file, sock, wait);
|
|
mask = 0;
|
|
|
|
vcc = ATM_SD(sock);
|
|
|
|
/* exceptional events */
|
|
if (sk->sk_err)
|
|
mask = EPOLLERR;
|
|
|
|
if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
|
|
test_bit(ATM_VF_CLOSE, &vcc->flags))
|
|
mask |= EPOLLHUP;
|
|
|
|
/* readable? */
|
|
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
|
|
mask |= EPOLLIN | EPOLLRDNORM;
|
|
|
|
/* 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 |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
|
|
|
|
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,
|
|
sockptr_t 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_sockptr(&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 (copy_from_sockptr(&value, optval, sizeof(value)))
|
|
return -EFAULT;
|
|
if (value)
|
|
vcc->atm_options |= ATM_ATMOPT_CLP;
|
|
else
|
|
vcc->atm_options &= ~ATM_ATMOPT_CLP;
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
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:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
int register_atmdevice_notifier(struct notifier_block *nb)
|
|
{
|
|
return atomic_notifier_chain_register(&atm_dev_notify_chain, nb);
|
|
}
|
|
EXPORT_SYMBOL_GPL(register_atmdevice_notifier);
|
|
|
|
void unregister_atmdevice_notifier(struct notifier_block *nb)
|
|
{
|
|
atomic_notifier_chain_unregister(&atm_dev_notify_chain, nb);
|
|
}
|
|
EXPORT_SYMBOL_GPL(unregister_atmdevice_notifier);
|
|
|
|
static int __init atm_init(void)
|
|
{
|
|
int error;
|
|
|
|
error = proto_register(&vcc_proto, 0);
|
|
if (error < 0)
|
|
goto out;
|
|
error = atmpvc_init();
|
|
if (error < 0) {
|
|
pr_err("atmpvc_init() failed with %d\n", error);
|
|
goto out_unregister_vcc_proto;
|
|
}
|
|
error = atmsvc_init();
|
|
if (error < 0) {
|
|
pr_err("atmsvc_init() failed with %d\n", error);
|
|
goto out_atmpvc_exit;
|
|
}
|
|
error = atm_proc_init();
|
|
if (error < 0) {
|
|
pr_err("atm_proc_init() failed with %d\n", error);
|
|
goto out_atmsvc_exit;
|
|
}
|
|
error = atm_sysfs_init();
|
|
if (error < 0) {
|
|
pr_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);
|