FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-23 01:40:30 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
3da889b616
linux/net/atm/common.c
Sasha Levin b67bfe0d42 hlist: drop the node parameter from iterators 
I'm not sure why, but the hlist for each entry iterators were conceived

        list_for_each_entry(pos, head, member)

The hlist ones were greedy and wanted an extra parameter:

        hlist_for_each_entry(tpos, pos, head, member)

Why did they need an extra pos parameter? I'm not quite sure. Not only
they don't really need it, it also prevents the iterator from looking
exactly like the list iterator, which is unfortunate.

Besides the semantic patch, there was some manual work required:

 - Fix up the actual hlist iterators in linux/list.h
 - Fix up the declaration of other iterators based on the hlist ones.
 - A very small amount of places were using the 'node' parameter, this
 was modified to use 'obj->member' instead.
 - Coccinelle didn't handle the hlist_for_each_entry_safe iterator
 properly, so those had to be fixed up manually.

The semantic patch which is mostly the work of Peter Senna Tschudin is here:

@@
iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host;

type T;
expression a,c,d,e;
identifier b;
statement S;
@@

-T b;
    <+... when != b
(
hlist_for_each_entry(a,
- b,
c, d) S
|
hlist_for_each_entry_continue(a,
- b,
c) S
|
hlist_for_each_entry_from(a,
- b,
c) S
|
hlist_for_each_entry_rcu(a,
- b,
c, d) S
|
hlist_for_each_entry_rcu_bh(a,
- b,
c, d) S
|
hlist_for_each_entry_continue_rcu_bh(a,
- b,
c) S
|
for_each_busy_worker(a, c,
- b,
d) S
|
ax25_uid_for_each(a,
- b,
c) S
|
ax25_for_each(a,
- b,
c) S
|
inet_bind_bucket_for_each(a,
- b,
c) S
|
sctp_for_each_hentry(a,
- b,
c) S
|
sk_for_each(a,
- b,
c) S
|
sk_for_each_rcu(a,
- b,
c) S
|
sk_for_each_from
-(a, b)
+(a)
S
+ sk_for_each_from(a) S
|
sk_for_each_safe(a,
- b,
c, d) S
|
sk_for_each_bound(a,
- b,
c) S
|
hlist_for_each_entry_safe(a,
- b,
c, d, e) S
|
hlist_for_each_entry_continue_rcu(a,
- b,
c) S
|
nr_neigh_for_each(a,
- b,
c) S
|
nr_neigh_for_each_safe(a,
- b,
c, d) S
|
nr_node_for_each(a,
- b,
c) S
|
nr_node_for_each_safe(a,
- b,
c, d) S
|
- for_each_gfn_sp(a, c, d, b) S
+ for_each_gfn_sp(a, c, d) S
|
- for_each_gfn_indirect_valid_sp(a, c, d, b) S
+ for_each_gfn_indirect_valid_sp(a, c, d) S
|
for_each_host(a,
- b,
c) S
|
for_each_host_safe(a,
- b,
c, d) S
|
for_each_mesh_entry(a,
- b,
c, d) S
)
    ...+>

[akpm@linux-foundation.org: drop bogus change from net/ipv4/raw.c]
[akpm@linux-foundation.org: drop bogus hunk from net/ipv6/raw.c]
[akpm@linux-foundation.org: checkpatch fixes]
[akpm@linux-foundation.org: fix warnings]
[akpm@linux-foudnation.org: redo intrusive kvm changes]
Tested-by: Peter Senna Tschudin <peter.senna@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:24 -08:00

911 lines
22 KiB
C
Raw Blame History

/* net/atm/common.c - ATM sockets (common part for PVC and SVC) */
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/net.h> /* struct socket, struct proto_ops */
#include <linux/atm.h> /* ATM stuff */
#include <linux/atmdev.h>
#include <linux/socket.h> /* SOL_SOCKET */
#include <linux/errno.h> /* error codes */
#include <linux/capability.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/time.h> /* struct timeval */
#include <linux/skbuff.h>
#include <linux/bitops.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <net/sock.h> /* struct sock */
#include <linux/uaccess.h>
#include <linux/poll.h>
#include <linux/atomic.h>
#include "resources.h" /* atm_find_dev */
#include "common.h" /* prototypes */
#include "protocols.h" /* atm_init_<transport> */
#include "addr.h" /* address registry */
#include "signaling.h" /* for WAITING and sigd_attach */
struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
EXPORT_SYMBOL(vcc_hash);
DEFINE_RWLOCK(vcc_sklist_lock);
EXPORT_SYMBOL(vcc_sklist_lock);
static ATOMIC_NOTIFIER_HEAD(atm_dev_notify_chain);
static void __vcc_insert_socket(struct sock *sk)
{
struct atm_vcc *vcc = atm_sk(sk);
struct hlist_head *head = &vcc_hash[vcc->vci & (VCC_HTABLE_SIZE - 1)];
sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1);
sk_add_node(sk, head);
}
void vcc_insert_socket(struct sock *sk)
{
write_lock_irq(&vcc_sklist_lock);
__vcc_insert_socket(sk);
write_unlock_irq(&vcc_sklist_lock);
}
EXPORT_SYMBOL(vcc_insert_socket);
static void vcc_remove_socket(struct sock *sk)
{
write_lock_irq(&vcc_sklist_lock);
sk_del_node_init(sk);
write_unlock_irq(&vcc_sklist_lock);
}
static struct sk_buff *alloc_tx(struct atm_vcc *vcc, unsigned int size)
{
struct sk_buff *skb;
struct sock *sk = sk_atm(vcc);
if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) {
pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
sk_wmem_alloc_get(sk), size, sk->sk_sndbuf);
return NULL;
}
while (!(skb = alloc_skb(size, GFP_KERNEL)))
schedule();
pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize);
atomic_add(skb->truesize, &sk->sk_wmem_alloc);
return skb;
}
static void vcc_sock_destruct(struct sock *sk)
{
if (atomic_read(&sk->sk_rmem_alloc))
printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n",
__func__, atomic_read(&sk->sk_rmem_alloc));
if (atomic_read(&sk->sk_wmem_alloc))
printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n",
__func__, atomic_read(&sk->sk_wmem_alloc));
}
static void vcc_def_wakeup(struct sock *sk)
{
struct socket_wq *wq;
rcu_read_lock();
wq = rcu_dereference(sk->sk_wq);
if (wq_has_sleeper(wq))
wake_up(&wq->wait);
rcu_read_unlock();
}
static inline int vcc_writable(struct sock *sk)
{
struct atm_vcc *vcc = atm_sk(sk);
return (vcc->qos.txtp.max_sdu +
atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
}
static void vcc_write_space(struct sock *sk)
{
struct socket_wq *wq;
rcu_read_lock();
if (vcc_writable(sk)) {
wq = rcu_dereference(sk->sk_wq);
if (wq_has_sleeper(wq))
wake_up_interruptible(&wq->wait);
sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
}
rcu_read_unlock();
}
static void vcc_release_cb(struct sock *sk)
{
struct atm_vcc *vcc = atm_sk(sk);
if (vcc->release_cb)
vcc->release_cb(vcc);
}
static struct proto vcc_proto = {
.name = "VCC",
.owner = THIS_MODULE,
.obj_size = sizeof(struct atm_vcc),
.release_cb = vcc_release_cb,
};
int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
{
struct sock *sk;
struct atm_vcc *vcc;
sock->sk = NULL;
if (sock->type == SOCK_STREAM)
return -EINVAL;
sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto);
if (!sk)
return -ENOMEM;
sock_init_data(sock, sk);
sk->sk_state_change = vcc_def_wakeup;
sk->sk_write_space = vcc_write_space;
vcc = atm_sk(sk);
vcc->dev = NULL;
memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc));
memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc));
vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
atomic_set(&sk->sk_wmem_alloc, 1);
atomic_set(&sk->sk_rmem_alloc, 0);
vcc->push = NULL;
vcc->pop = NULL;
vcc->owner = NULL;
vcc->push_oam = NULL;
vcc->release_cb = NULL;
vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
vcc->atm_options = vcc->aal_options = 0;
sk->sk_destruct = vcc_sock_destruct;
return 0;
}
static void vcc_destroy_socket(struct sock *sk)
{
struct atm_vcc *vcc = atm_sk(sk);
struct sk_buff *skb;
set_bit(ATM_VF_CLOSE, &vcc->flags);
clear_bit(ATM_VF_READY, &vcc->flags);
if (vcc->dev) {
if (vcc->dev->ops->close)
vcc->dev->ops->close(vcc);
if (vcc->push)
vcc->push(vcc, NULL); /* atmarpd has no push */
module_put(vcc->owner);
while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
atm_return(vcc, skb->truesize);
kfree_skb(skb);
}
module_put(vcc->dev->ops->owner);
atm_dev_put(vcc->dev);
}
vcc_remove_socket(sk);
}
int vcc_release(struct socket *sock)
{
struct sock *sk = sock->sk;
if (sk) {
lock_sock(sk);
vcc_destroy_socket(sock->sk);
release_sock(sk);
sock_put(sk);
}
return 0;
}
void vcc_release_async(struct atm_vcc *vcc, int reply)
{
struct sock *sk = sk_atm(vcc);
set_bit(ATM_VF_CLOSE, &vcc->flags);
sk->sk_shutdown |= RCV_SHUTDOWN;
sk->sk_err = -reply;
clear_bit(ATM_VF_WAITING, &vcc->flags);
sk->sk_state_change(sk);
}
EXPORT_SYMBOL(vcc_release_async);
void vcc_process_recv_queue(struct atm_vcc *vcc)
{
struct sk_buff_head queue, *rq;
struct sk_buff *skb, *tmp;
unsigned long flags;
__skb_queue_head_init(&queue);
rq = &sk_atm(vcc)->sk_receive_queue;
spin_lock_irqsave(&rq->lock, flags);
skb_queue_splice_init(rq, &queue);
spin_unlock_irqrestore(&rq->lock, flags);
skb_queue_walk_safe(&queue, skb, tmp) {
__skb_unlink(skb, &queue);
vcc->push(vcc, skb);
}
}
EXPORT_SYMBOL(vcc_process_recv_queue);
void atm_dev_signal_change(struct atm_dev *dev, char signal)
{
pr_debug("%s signal=%d dev=%p number=%d dev->signal=%d\n",
__func__, signal, dev, dev->number, dev->signal);
/* atm driver sending invalid signal */
WARN_ON(signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND);
if (dev->signal == signal)
return; /* no change */
dev->signal = signal;
atomic_notifier_call_chain(&atm_dev_notify_chain, signal, dev);
}
EXPORT_SYMBOL(atm_dev_signal_change);
void atm_dev_release_vccs(struct atm_dev *dev)
{
int i;
write_lock_irq(&vcc_sklist_lock);
for (i = 0; i < VCC_HTABLE_SIZE; i++) {
struct hlist_head *head = &vcc_hash[i];
struct hlist_node *tmp;
struct sock *s;
struct atm_vcc *vcc;
sk_for_each_safe(s, tmp, head) {
vcc = atm_sk(s);
if (vcc->dev == dev) {
vcc_release_async(vcc, -EPIPE);
sk_del_node_init(s);
}
}
}
write_unlock_irq(&vcc_sklist_lock);
}
EXPORT_SYMBOL(atm_dev_release_vccs);
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:
pr_warning("AAL problems ... (%d)\n", aal);
/* fall through */
case ATM_AAL5:
max_sdu = ATM_MAX_AAL5_PDU;
}
if (!tp->max_sdu)
tp->max_sdu = max_sdu;
else if (tp->max_sdu > max_sdu)
return -EINVAL;
if (!tp->max_cdv)
tp->max_cdv = ATM_MAX_CDV;
return 0;
}
static int check_ci(const struct atm_vcc *vcc, short vpi, int vci)
{
struct hlist_head *head = &vcc_hash[vci & (VCC_HTABLE_SIZE - 1)];
struct sock *s;
struct atm_vcc *walk;
sk_for_each(s, head) {
walk = atm_sk(s);
if (walk->dev != vcc->dev)
continue;
if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
walk->vci == vci && ((walk->qos.txtp.traffic_class !=
ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
(walk->qos.rxtp.traffic_class != ATM_NONE &&
vcc->qos.rxtp.traffic_class != ATM_NONE)))
return -EADDRINUSE;
}
/* allow VCCs with same VPI/VCI iff they don't collide on
TX/RX (but we may refuse such sharing for other reasons,
e.g. if protocol requires to have both channels) */
return 0;
}
static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci)
{
static short p; /* poor man's per-device cache */
static int c;
short old_p;
int old_c;
int err;
if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
err = check_ci(vcc, *vpi, *vci);
return err;
}
/* last scan may have left values out of bounds for current device */
if (*vpi != ATM_VPI_ANY)
p = *vpi;
else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
p = 0;
if (*vci != ATM_VCI_ANY)
c = *vci;
else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
c = ATM_NOT_RSV_VCI;
old_p = p;
old_c = c;
do {
if (!check_ci(vcc, p, c)) {
*vpi = p;
*vci = c;
return 0;
}
if (*vci == ATM_VCI_ANY) {
c++;
if (c >= 1 << vcc->dev->ci_range.vci_bits)
c = ATM_NOT_RSV_VCI;
}
if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
*vpi == ATM_VPI_ANY) {
p++;
if (p >= 1 << vcc->dev->ci_range.vpi_bits)
p = 0;
}
} while (old_p != p || old_c != c);
return -EADDRINUSE;
}
static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
int vci)
{
struct sock *sk = sk_atm(vcc);
int error;
if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY &&
vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC &&
vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits))
return -EINVAL;
if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
return -EPERM;
error = -ENODEV;
if (!try_module_get(dev->ops->owner))
return error;
vcc->dev = dev;
write_lock_irq(&vcc_sklist_lock);
if (test_bit(ATM_DF_REMOVED, &dev->flags) ||
(error = find_ci(vcc, &vpi, &vci))) {
write_unlock_irq(&vcc_sklist_lock);
goto fail_module_put;
}
vcc->vpi = vpi;
vcc->vci = vci;
__vcc_insert_socket(sk);
write_unlock_irq(&vcc_sklist_lock);
switch (vcc->qos.aal) {
case ATM_AAL0:
error = atm_init_aal0(vcc);
vcc->stats = &dev->stats.aal0;
break;
case ATM_AAL34:
error = atm_init_aal34(vcc);
vcc->stats = &dev->stats.aal34;
break;
case ATM_NO_AAL:
/* ATM_AAL5 is also used in the "0 for default" case */
vcc->qos.aal = ATM_AAL5;
/* fall through */
case ATM_AAL5:
error = atm_init_aal5(vcc);
vcc->stats = &dev->stats.aal5;
break;
default:
error = -EPROTOTYPE;
}
if (!error)
error = adjust_tp(&vcc->qos.txtp, vcc->qos.aal);
if (!error)
error = adjust_tp(&vcc->qos.rxtp, vcc->qos.aal);
if (error)
goto fail;
pr_debug("VCC %d.%d, AAL %d\n", vpi, vci, vcc->qos.aal);
pr_debug(" TX: %d, PCR %d..%d, SDU %d\n",
vcc->qos.txtp.traffic_class,
vcc->qos.txtp.min_pcr,
vcc->qos.txtp.max_pcr,
vcc->qos.txtp.max_sdu);
pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",
vcc->qos.rxtp.traffic_class,
vcc->qos.rxtp.min_pcr,
vcc->qos.rxtp.max_pcr,
vcc->qos.rxtp.max_sdu);
if (dev->ops->open) {
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 kiocb *iocb, struct socket *sock, struct msghdr *msg,
size_t size, int flags)
{
struct sock *sk = sock->sk;
struct atm_vcc *vcc;
struct sk_buff *skb;
int copied, error = -EINVAL;
if (sock->state != SS_CONNECTED)
return -ENOTCONN;
/* 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_iovec(skb, 0, msg->msg_iov, 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 kiocb *iocb, struct socket *sock, struct msghdr *m,
size_t total_len)
{
struct sock *sk = sock->sk;
DEFINE_WAIT(wait);
struct atm_vcc *vcc;
struct sk_buff *skb;
int eff, error;
const void __user *buff;
int size;
lock_sock(sk);
if (sock->state != SS_CONNECTED) {
error = -ENOTCONN;
goto out;
}
if (m->msg_name) {
error = -EISCONN;
goto out;
}
if (m->msg_iovlen != 1) {
error = -ENOSYS; /* fix this later @@@ */
goto out;
}
buff = m->msg_iov->iov_base;
size = m->msg_iov->iov_len;
vcc = ATM_SD(sock);
if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
test_bit(ATM_VF_CLOSE, &vcc->flags) ||
!test_bit(ATM_VF_READY, &vcc->flags)) {
error = -EPIPE;
send_sig(SIGPIPE, current, 0);
goto out;
}
if (!size) {
error = 0;
goto out;
}
if (size < 0 || size > vcc->qos.txtp.max_sdu) {
error = -EMSGSIZE;
goto out;
}
eff = (size+3) & ~3; /* align to word boundary */
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
error = 0;
while (!(skb = alloc_tx(vcc, eff))) {
if (m->msg_flags & MSG_DONTWAIT) {
error = -EAGAIN;
break;
}
schedule();
if (signal_pending(current)) {
error = -ERESTARTSYS;
break;
}
if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
test_bit(ATM_VF_CLOSE, &vcc->flags) ||
!test_bit(ATM_VF_READY, &vcc->flags)) {
error = -EPIPE;
send_sig(SIGPIPE, current, 0);
break;
}
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
}
finish_wait(sk_sleep(sk), &wait);
if (error)
goto out;
skb->dev = NULL; /* for paths shared with net_device interfaces */
ATM_SKB(skb)->atm_options = vcc->atm_options;
if (copy_from_user(skb_put(skb, size), buff, size)) {
kfree_skb(skb);
error = -EFAULT;
goto out;
}
if (eff != size)
memset(skb->data + size, 0, eff-size);
error = vcc->dev->ops->send(vcc, skb);
error = error ? error : size;
out:
release_sock(sk);
return error;
}
unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
{
struct sock *sk = sock->sk;
struct atm_vcc *vcc;
unsigned int mask;
sock_poll_wait(file, sk_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);
Reference in New Issue View Git Blame Copy Permalink