forked from Minki/linux
b2fe5fa686
Pull networking updates from David Miller: 1) Significantly shrink the core networking routing structures. Result of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf 2) Add netdevsim driver for testing various offloads, from Jakub Kicinski. 3) Support cross-chip FDB operations in DSA, from Vivien Didelot. 4) Add a 2nd listener hash table for TCP, similar to what was done for UDP. From Martin KaFai Lau. 5) Add eBPF based queue selection to tun, from Jason Wang. 6) Lockless qdisc support, from John Fastabend. 7) SCTP stream interleave support, from Xin Long. 8) Smoother TCP receive autotuning, from Eric Dumazet. 9) Lots of erspan tunneling enhancements, from William Tu. 10) Add true function call support to BPF, from Alexei Starovoitov. 11) Add explicit support for GRO HW offloading, from Michael Chan. 12) Support extack generation in more netlink subsystems. From Alexander Aring, Quentin Monnet, and Jakub Kicinski. 13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From Russell King. 14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso. 15) Many improvements and simplifications to the NFP driver bpf JIT, from Jakub Kicinski. 16) Support for ipv6 non-equal cost multipath routing, from Ido Schimmel. 17) Add resource abstration to devlink, from Arkadi Sharshevsky. 18) Packet scheduler classifier shared filter block support, from Jiri Pirko. 19) Avoid locking in act_csum, from Davide Caratti. 20) devinet_ioctl() simplifications from Al viro. 21) More TCP bpf improvements from Lawrence Brakmo. 22) Add support for onlink ipv6 route flag, similar to ipv4, from David Ahern. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits) tls: Add support for encryption using async offload accelerator ip6mr: fix stale iterator net/sched: kconfig: Remove blank help texts openvswitch: meter: Use 64-bit arithmetic instead of 32-bit tcp_nv: fix potential integer overflow in tcpnv_acked r8169: fix RTL8168EP take too long to complete driver initialization. qmi_wwan: Add support for Quectel EP06 rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK ipmr: Fix ptrdiff_t print formatting ibmvnic: Wait for device response when changing MAC qlcnic: fix deadlock bug tcp: release sk_frag.page in tcp_disconnect ipv4: Get the address of interface correctly. net_sched: gen_estimator: fix lockdep splat net: macb: Handle HRESP error net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring ipv6: addrconf: break critical section in addrconf_verify_rtnl() ipv6: change route cache aging logic i40e/i40evf: Update DESC_NEEDED value to reflect larger value bnxt_en: cleanup DIM work on device shutdown ...
906 lines
21 KiB
C
906 lines
21 KiB
C
/* 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) {
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if (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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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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/* fall through */
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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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/* fall through */
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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,
|
|
vcc->qos.txtp.max_pcr,
|
|
vcc->qos.txtp.max_sdu);
|
|
pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",
|
|
vcc->qos.rxtp.traffic_class,
|
|
vcc->qos.rxtp.min_pcr,
|
|
vcc->qos.rxtp.max_pcr,
|
|
vcc->qos.rxtp.max_sdu);
|
|
|
|
if (dev->ops->open) {
|
|
error = dev->ops->open(vcc);
|
|
if (error)
|
|
goto fail;
|
|
}
|
|
return 0;
|
|
|
|
fail:
|
|
vcc_remove_socket(sk);
|
|
fail_module_put:
|
|
module_put(dev->ops->owner);
|
|
/* ensure we get dev module ref count correct */
|
|
vcc->dev = NULL;
|
|
return error;
|
|
}
|
|
|
|
int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
|
|
{
|
|
struct atm_dev *dev;
|
|
struct atm_vcc *vcc = ATM_SD(sock);
|
|
int error;
|
|
|
|
pr_debug("(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, 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_msg(skb, 0, msg, copied);
|
|
if (error)
|
|
return error;
|
|
sock_recv_ts_and_drops(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);
|
|
refcount_add(skb->truesize, &sk->sk_wmem_alloc);
|
|
|
|
skb->dev = NULL; /* for paths shared with net_device interfaces */
|
|
ATM_SKB(skb)->atm_options = vcc->atm_options;
|
|
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, sk_sleep(sk), wait);
|
|
mask = 0;
|
|
|
|
vcc = ATM_SD(sock);
|
|
|
|
/* exceptional events */
|
|
if (sk->sk_err)
|
|
mask = POLLERR;
|
|
|
|
if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
|
|
test_bit(ATM_VF_CLOSE, &vcc->flags))
|
|
mask |= POLLHUP;
|
|
|
|
/* readable? */
|
|
if (!skb_queue_empty(&sk->sk_receive_queue))
|
|
mask |= POLLIN | POLLRDNORM;
|
|
|
|
/* writable? */
|
|
if (sock->state == SS_CONNECTING &&
|
|
test_bit(ATM_VF_WAITING, &vcc->flags))
|
|
return mask;
|
|
|
|
if (vcc->qos.txtp.traffic_class != ATM_NONE &&
|
|
vcc_writable(sk))
|
|
mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
|
|
|
|
return mask;
|
|
}
|
|
|
|
static int atm_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
|
|
{
|
|
int error;
|
|
|
|
/*
|
|
* Don't let the QoS change the already connected AAL type nor the
|
|
* traffic class.
|
|
*/
|
|
if (qos->aal != vcc->qos.aal ||
|
|
qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class ||
|
|
qos->txtp.traffic_class != vcc->qos.txtp.traffic_class)
|
|
return -EINVAL;
|
|
error = adjust_tp(&qos->txtp, qos->aal);
|
|
if (!error)
|
|
error = adjust_tp(&qos->rxtp, qos->aal);
|
|
if (error)
|
|
return error;
|
|
if (!vcc->dev->ops->change_qos)
|
|
return -EOPNOTSUPP;
|
|
if (sk_atm(vcc)->sk_family == AF_ATMPVC)
|
|
return vcc->dev->ops->change_qos(vcc, qos, ATM_MF_SET);
|
|
return svc_change_qos(vcc, qos);
|
|
}
|
|
|
|
static int check_tp(const struct atm_trafprm *tp)
|
|
{
|
|
/* @@@ Should be merged with adjust_tp */
|
|
if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS)
|
|
return 0;
|
|
if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr &&
|
|
!tp->max_pcr)
|
|
return -EINVAL;
|
|
if (tp->min_pcr == ATM_MAX_PCR)
|
|
return -EINVAL;
|
|
if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR &&
|
|
tp->min_pcr > tp->max_pcr)
|
|
return -EINVAL;
|
|
/*
|
|
* We allow pcr to be outside [min_pcr,max_pcr], because later
|
|
* adjustment may still push it in the valid range.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static int check_qos(const struct atm_qos *qos)
|
|
{
|
|
int error;
|
|
|
|
if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class)
|
|
return -EINVAL;
|
|
if (qos->txtp.traffic_class != qos->rxtp.traffic_class &&
|
|
qos->txtp.traffic_class && qos->rxtp.traffic_class &&
|
|
qos->txtp.traffic_class != ATM_ANYCLASS &&
|
|
qos->rxtp.traffic_class != ATM_ANYCLASS)
|
|
return -EINVAL;
|
|
error = check_tp(&qos->txtp);
|
|
if (error)
|
|
return error;
|
|
return check_tp(&qos->rxtp);
|
|
}
|
|
|
|
int vcc_setsockopt(struct socket *sock, int level, int optname,
|
|
char __user *optval, unsigned int optlen)
|
|
{
|
|
struct atm_vcc *vcc;
|
|
unsigned long value;
|
|
int error;
|
|
|
|
if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
|
|
return -EINVAL;
|
|
|
|
vcc = ATM_SD(sock);
|
|
switch (optname) {
|
|
case SO_ATMQOS:
|
|
{
|
|
struct atm_qos qos;
|
|
|
|
if (copy_from_user(&qos, optval, sizeof(qos)))
|
|
return -EFAULT;
|
|
error = check_qos(&qos);
|
|
if (error)
|
|
return error;
|
|
if (sock->state == SS_CONNECTED)
|
|
return atm_change_qos(vcc, &qos);
|
|
if (sock->state != SS_UNCONNECTED)
|
|
return -EBADFD;
|
|
vcc->qos = qos;
|
|
set_bit(ATM_VF_HASQOS, &vcc->flags);
|
|
return 0;
|
|
}
|
|
case SO_SETCLP:
|
|
if (get_user(value, (unsigned long __user *)optval))
|
|
return -EFAULT;
|
|
if (value)
|
|
vcc->atm_options |= ATM_ATMOPT_CLP;
|
|
else
|
|
vcc->atm_options &= ~ATM_ATMOPT_CLP;
|
|
return 0;
|
|
default:
|
|
if (level == SOL_SOCKET)
|
|
return -EINVAL;
|
|
break;
|
|
}
|
|
if (!vcc->dev || !vcc->dev->ops->setsockopt)
|
|
return -EINVAL;
|
|
return vcc->dev->ops->setsockopt(vcc, level, optname, optval, optlen);
|
|
}
|
|
|
|
int vcc_getsockopt(struct socket *sock, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct atm_vcc *vcc;
|
|
int len;
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
|
|
return -EINVAL;
|
|
|
|
vcc = ATM_SD(sock);
|
|
switch (optname) {
|
|
case SO_ATMQOS:
|
|
if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
|
|
return -EINVAL;
|
|
return copy_to_user(optval, &vcc->qos, sizeof(vcc->qos))
|
|
? -EFAULT : 0;
|
|
case SO_SETCLP:
|
|
return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : 0,
|
|
(unsigned long __user *)optval) ? -EFAULT : 0;
|
|
case SO_ATMPVC:
|
|
{
|
|
struct sockaddr_atmpvc pvc;
|
|
|
|
if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
|
|
return -ENOTCONN;
|
|
memset(&pvc, 0, sizeof(pvc));
|
|
pvc.sap_family = AF_ATMPVC;
|
|
pvc.sap_addr.itf = vcc->dev->number;
|
|
pvc.sap_addr.vpi = vcc->vpi;
|
|
pvc.sap_addr.vci = vcc->vci;
|
|
return copy_to_user(optval, &pvc, sizeof(pvc)) ? -EFAULT : 0;
|
|
}
|
|
default:
|
|
if (level == SOL_SOCKET)
|
|
return -EINVAL;
|
|
break;
|
|
}
|
|
if (!vcc->dev || !vcc->dev->ops->getsockopt)
|
|
return -EINVAL;
|
|
return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len);
|
|
}
|
|
|
|
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);
|