/**
|
* This file is part of the Xenomai project.
|
*
|
* @note Copyright (C) 2009 Philippe Gerum <rpm@xenomai.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
*/
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#include <linux/module.h>
|
#include <linux/list.h>
|
#include <linux/kernel.h>
|
#include <linux/slab.h>
|
#include <linux/poll.h>
|
#include <linux/time.h>
|
#include <cobalt/kernel/heap.h>
|
#include <cobalt/kernel/bufd.h>
|
#include <cobalt/kernel/map.h>
|
#include <rtdm/ipc.h>
|
#include "internal.h"
|
|
#define IDDP_SOCKET_MAGIC 0xa37a37a8
|
|
struct iddp_message {
|
struct list_head next;
|
int from;
|
size_t rdoff;
|
size_t len;
|
char data[];
|
};
|
|
struct iddp_socket {
|
int magic;
|
struct sockaddr_ipc name;
|
struct sockaddr_ipc peer;
|
struct xnheap *bufpool;
|
struct xnheap privpool;
|
rtdm_waitqueue_t *poolwaitq;
|
rtdm_waitqueue_t privwaitq;
|
size_t poolsz;
|
rtdm_sem_t insem;
|
struct list_head inq;
|
u_long status;
|
xnhandle_t handle;
|
char label[XNOBJECT_NAME_LEN];
|
nanosecs_rel_t rx_timeout;
|
nanosecs_rel_t tx_timeout;
|
unsigned long stalls; /* Buffer stall counter. */
|
struct rtipc_private *priv;
|
};
|
|
static struct sockaddr_ipc nullsa = {
|
.sipc_family = AF_RTIPC,
|
.sipc_port = -1
|
};
|
|
static struct xnmap *portmap;
|
|
static rtdm_waitqueue_t poolwaitq;
|
|
#define _IDDP_BINDING 0
|
#define _IDDP_BOUND 1
|
#define _IDDP_CONNECTED 2
|
|
#ifdef CONFIG_XENO_OPT_VFILE
|
|
static char *__iddp_link_target(void *obj)
|
{
|
struct iddp_socket *sk = obj;
|
|
return kasformat("%d", sk->name.sipc_port);
|
}
|
|
extern struct xnptree rtipc_ptree;
|
|
static struct xnpnode_link __iddp_pnode = {
|
.node = {
|
.dirname = "iddp",
|
.root = &rtipc_ptree,
|
.ops = &xnregistry_vlink_ops,
|
},
|
.target = __iddp_link_target,
|
};
|
|
#else /* !CONFIG_XENO_OPT_VFILE */
|
|
static struct xnpnode_link __iddp_pnode = {
|
.node = {
|
.dirname = "iddp",
|
},
|
};
|
|
#endif /* !CONFIG_XENO_OPT_VFILE */
|
|
static inline void __iddp_init_mbuf(struct iddp_message *mbuf, size_t len)
|
{
|
mbuf->rdoff = 0;
|
mbuf->len = len;
|
INIT_LIST_HEAD(&mbuf->next);
|
}
|
|
static struct iddp_message *
|
__iddp_alloc_mbuf(struct iddp_socket *sk, size_t len,
|
nanosecs_rel_t timeout, int flags, int *pret)
|
{
|
struct iddp_message *mbuf = NULL;
|
rtdm_toseq_t timeout_seq;
|
rtdm_lockctx_t s;
|
int ret = 0;
|
|
rtdm_toseq_init(&timeout_seq, timeout);
|
|
for (;;) {
|
mbuf = xnheap_alloc(sk->bufpool, len + sizeof(*mbuf));
|
if (mbuf) {
|
__iddp_init_mbuf(mbuf, len);
|
break;
|
}
|
if (flags & MSG_DONTWAIT) {
|
ret = -EAGAIN;
|
break;
|
}
|
/*
|
* No luck, no buffer free. Wait for a buffer to be
|
* released and retry. Admittedly, we might create a
|
* thundering herd effect if many waiters put a lot of
|
* memory pressure on the pool, but in this case, the
|
* pool size should be adjusted.
|
*/
|
rtdm_waitqueue_lock(sk->poolwaitq, s);
|
++sk->stalls;
|
ret = rtdm_timedwait_locked(sk->poolwaitq, timeout, &timeout_seq);
|
rtdm_waitqueue_unlock(sk->poolwaitq, s);
|
if (unlikely(ret == -EIDRM))
|
ret = -ECONNRESET;
|
if (ret)
|
break;
|
}
|
|
*pret = ret;
|
|
return mbuf;
|
}
|
|
static void __iddp_free_mbuf(struct iddp_socket *sk,
|
struct iddp_message *mbuf)
|
{
|
xnheap_free(sk->bufpool, mbuf);
|
rtdm_waitqueue_broadcast(sk->poolwaitq);
|
}
|
|
static int iddp_socket(struct rtdm_fd *fd)
|
{
|
struct rtipc_private *priv = rtdm_fd_to_private(fd);
|
struct iddp_socket *sk = priv->state;
|
|
sk->magic = IDDP_SOCKET_MAGIC;
|
sk->name = nullsa; /* Unbound */
|
sk->peer = nullsa;
|
sk->bufpool = &cobalt_heap;
|
sk->poolwaitq = &poolwaitq;
|
sk->poolsz = 0;
|
sk->status = 0;
|
sk->handle = 0;
|
sk->rx_timeout = RTDM_TIMEOUT_INFINITE;
|
sk->tx_timeout = RTDM_TIMEOUT_INFINITE;
|
sk->stalls = 0;
|
*sk->label = 0;
|
INIT_LIST_HEAD(&sk->inq);
|
rtdm_sem_init(&sk->insem, 0);
|
rtdm_waitqueue_init(&sk->privwaitq);
|
sk->priv = priv;
|
|
return 0;
|
}
|
|
static void iddp_close(struct rtdm_fd *fd)
|
{
|
struct rtipc_private *priv = rtdm_fd_to_private(fd);
|
struct iddp_socket *sk = priv->state;
|
struct iddp_message *mbuf;
|
rtdm_lockctx_t s;
|
void *poolmem;
|
u32 poolsz;
|
|
rtdm_sem_destroy(&sk->insem);
|
rtdm_waitqueue_destroy(&sk->privwaitq);
|
|
if (test_bit(_IDDP_BOUND, &sk->status)) {
|
if (sk->handle)
|
xnregistry_remove(sk->handle);
|
if (sk->name.sipc_port > -1) {
|
cobalt_atomic_enter(s);
|
xnmap_remove(portmap, sk->name.sipc_port);
|
cobalt_atomic_leave(s);
|
}
|
if (sk->bufpool != &cobalt_heap) {
|
poolmem = xnheap_get_membase(&sk->privpool);
|
poolsz = xnheap_get_size(&sk->privpool);
|
xnheap_destroy(&sk->privpool);
|
xnheap_vfree(poolmem);
|
return;
|
}
|
}
|
|
/* Send unread datagrams back to the system heap. */
|
while (!list_empty(&sk->inq)) {
|
mbuf = list_entry(sk->inq.next, struct iddp_message, next);
|
list_del(&mbuf->next);
|
xnheap_free(&cobalt_heap, mbuf);
|
}
|
|
kfree(sk);
|
|
return;
|
}
|
|
static ssize_t __iddp_recvmsg(struct rtdm_fd *fd,
|
struct iovec *iov, int iovlen, int flags,
|
struct sockaddr_ipc *saddr)
|
{
|
struct rtipc_private *priv = rtdm_fd_to_private(fd);
|
struct iddp_socket *sk = priv->state;
|
ssize_t maxlen, len, wrlen, vlen;
|
rtdm_toseq_t timeout_seq, *toseq;
|
int nvec, rdoff, ret, dofree;
|
struct iddp_message *mbuf;
|
nanosecs_rel_t timeout;
|
struct xnbufd bufd;
|
rtdm_lockctx_t s;
|
|
if (!test_bit(_IDDP_BOUND, &sk->status))
|
return -EAGAIN;
|
|
maxlen = rtdm_get_iov_flatlen(iov, iovlen);
|
if (maxlen == 0)
|
return 0;
|
|
if (flags & MSG_DONTWAIT) {
|
timeout = RTDM_TIMEOUT_NONE;
|
toseq = NULL;
|
} else {
|
timeout = sk->rx_timeout;
|
toseq = &timeout_seq;
|
}
|
|
/* We want to pick one buffer from the queue. */
|
|
for (;;) {
|
ret = rtdm_sem_timeddown(&sk->insem, timeout, toseq);
|
if (unlikely(ret)) {
|
if (ret == -EIDRM)
|
return -ECONNRESET;
|
return ret;
|
}
|
/* We may have spurious wakeups. */
|
cobalt_atomic_enter(s);
|
if (!list_empty(&sk->inq))
|
break;
|
cobalt_atomic_leave(s);
|
}
|
|
/* Pull heading message from input queue. */
|
mbuf = list_entry(sk->inq.next, struct iddp_message, next);
|
rdoff = mbuf->rdoff;
|
len = mbuf->len - rdoff;
|
if (saddr) {
|
saddr->sipc_family = AF_RTIPC;
|
saddr->sipc_port = mbuf->from;
|
}
|
if (maxlen >= len) {
|
list_del(&mbuf->next);
|
dofree = 1;
|
if (list_empty(&sk->inq)) /* -> non-readable */
|
xnselect_signal(&priv->recv_block, 0);
|
|
} else {
|
/* Buffer is only partially read: repost. */
|
mbuf->rdoff += maxlen;
|
len = maxlen;
|
dofree = 0;
|
}
|
|
if (!dofree)
|
rtdm_sem_up(&sk->insem);
|
|
cobalt_atomic_leave(s);
|
|
/* Now, write "len" bytes from mbuf->data to the vector cells */
|
for (nvec = 0, wrlen = len; nvec < iovlen && wrlen > 0; nvec++) {
|
if (iov[nvec].iov_len == 0)
|
continue;
|
vlen = wrlen >= iov[nvec].iov_len ? iov[nvec].iov_len : wrlen;
|
if (rtdm_fd_is_user(fd)) {
|
xnbufd_map_uread(&bufd, iov[nvec].iov_base, vlen);
|
ret = xnbufd_copy_from_kmem(&bufd, mbuf->data + rdoff, vlen);
|
xnbufd_unmap_uread(&bufd);
|
} else {
|
xnbufd_map_kread(&bufd, iov[nvec].iov_base, vlen);
|
ret = xnbufd_copy_from_kmem(&bufd, mbuf->data + rdoff, vlen);
|
xnbufd_unmap_kread(&bufd);
|
}
|
if (ret < 0)
|
break;
|
iov[nvec].iov_base += vlen;
|
iov[nvec].iov_len -= vlen;
|
wrlen -= vlen;
|
rdoff += vlen;
|
}
|
|
if (dofree)
|
__iddp_free_mbuf(sk, mbuf);
|
|
return ret ?: len;
|
}
|
|
static ssize_t iddp_recvmsg(struct rtdm_fd *fd,
|
struct user_msghdr *msg, int flags)
|
{
|
struct iovec iov_fast[RTDM_IOV_FASTMAX], *iov;
|
struct sockaddr_ipc saddr;
|
ssize_t ret;
|
|
if (flags & ~MSG_DONTWAIT)
|
return -EINVAL;
|
|
if (msg->msg_name) {
|
if (msg->msg_namelen < sizeof(struct sockaddr_ipc))
|
return -EINVAL;
|
} else if (msg->msg_namelen != 0)
|
return -EINVAL;
|
|
if (msg->msg_iovlen >= UIO_MAXIOV)
|
return -EINVAL;
|
|
/* Copy I/O vector in */
|
ret = rtdm_get_iovec(fd, &iov, msg, iov_fast);
|
if (ret)
|
return ret;
|
|
ret = __iddp_recvmsg(fd, iov, msg->msg_iovlen, flags, &saddr);
|
if (ret <= 0) {
|
rtdm_drop_iovec(iov, iov_fast);
|
return ret;
|
}
|
|
/* Copy the updated I/O vector back */
|
if (rtdm_put_iovec(fd, iov, msg, iov_fast))
|
return -EFAULT;
|
|
/* Copy the source address if required. */
|
if (msg->msg_name) {
|
if (rtipc_put_arg(fd, msg->msg_name, &saddr, sizeof(saddr)))
|
return -EFAULT;
|
msg->msg_namelen = sizeof(struct sockaddr_ipc);
|
}
|
|
return ret;
|
}
|
|
static ssize_t iddp_read(struct rtdm_fd *fd, void *buf, size_t len)
|
{
|
struct iovec iov = { .iov_base = buf, .iov_len = len };
|
|
return __iddp_recvmsg(fd, &iov, 1, 0, NULL);
|
}
|
|
static ssize_t __iddp_sendmsg(struct rtdm_fd *fd,
|
struct iovec *iov, int iovlen, int flags,
|
const struct sockaddr_ipc *daddr)
|
{
|
struct rtipc_private *priv = rtdm_fd_to_private(fd);
|
struct iddp_socket *sk = priv->state, *rsk;
|
struct iddp_message *mbuf;
|
ssize_t len, rdlen, vlen;
|
int nvec, wroff, ret;
|
struct rtdm_fd *rfd;
|
struct xnbufd bufd;
|
rtdm_lockctx_t s;
|
|
len = rtdm_get_iov_flatlen(iov, iovlen);
|
if (len == 0)
|
return 0;
|
|
cobalt_atomic_enter(s);
|
rfd = xnmap_fetch_nocheck(portmap, daddr->sipc_port);
|
if (rfd && rtdm_fd_lock(rfd) < 0)
|
rfd = NULL;
|
cobalt_atomic_leave(s);
|
if (rfd == NULL)
|
return -ECONNRESET;
|
|
rsk = rtipc_fd_to_state(rfd);
|
if (!test_bit(_IDDP_BOUND, &rsk->status)) {
|
rtdm_fd_unlock(rfd);
|
return -ECONNREFUSED;
|
}
|
|
mbuf = __iddp_alloc_mbuf(rsk, len, sk->tx_timeout, flags, &ret);
|
if (unlikely(ret)) {
|
rtdm_fd_unlock(rfd);
|
return ret;
|
}
|
|
/* Now, move "len" bytes to mbuf->data from the vector cells */
|
for (nvec = 0, rdlen = len, wroff = 0;
|
nvec < iovlen && rdlen > 0; nvec++) {
|
if (iov[nvec].iov_len == 0)
|
continue;
|
vlen = rdlen >= iov[nvec].iov_len ? iov[nvec].iov_len : rdlen;
|
if (rtdm_fd_is_user(fd)) {
|
xnbufd_map_uread(&bufd, iov[nvec].iov_base, vlen);
|
ret = xnbufd_copy_to_kmem(mbuf->data + wroff, &bufd, vlen);
|
xnbufd_unmap_uread(&bufd);
|
} else {
|
xnbufd_map_kread(&bufd, iov[nvec].iov_base, vlen);
|
ret = xnbufd_copy_to_kmem(mbuf->data + wroff, &bufd, vlen);
|
xnbufd_unmap_kread(&bufd);
|
}
|
if (ret < 0)
|
goto fail;
|
iov[nvec].iov_base += vlen;
|
iov[nvec].iov_len -= vlen;
|
rdlen -= vlen;
|
wroff += vlen;
|
}
|
|
cobalt_atomic_enter(s);
|
|
/*
|
* CAUTION: we must remain atomic from the moment we signal
|
* POLLIN, until sem_up has happened.
|
*/
|
if (list_empty(&rsk->inq)) /* -> readable */
|
xnselect_signal(&rsk->priv->recv_block, POLLIN);
|
|
mbuf->from = sk->name.sipc_port;
|
|
if (flags & MSG_OOB)
|
list_add(&mbuf->next, &rsk->inq);
|
else
|
list_add_tail(&mbuf->next, &rsk->inq);
|
|
rtdm_sem_up(&rsk->insem); /* Will resched. */
|
|
cobalt_atomic_leave(s);
|
|
rtdm_fd_unlock(rfd);
|
|
return len;
|
|
fail:
|
__iddp_free_mbuf(rsk, mbuf);
|
|
rtdm_fd_unlock(rfd);
|
|
return ret;
|
}
|
|
static ssize_t iddp_sendmsg(struct rtdm_fd *fd,
|
const struct user_msghdr *msg, int flags)
|
{
|
struct rtipc_private *priv = rtdm_fd_to_private(fd);
|
struct iovec iov_fast[RTDM_IOV_FASTMAX], *iov;
|
struct iddp_socket *sk = priv->state;
|
struct sockaddr_ipc daddr;
|
ssize_t ret;
|
|
if (flags & ~(MSG_OOB | MSG_DONTWAIT))
|
return -EINVAL;
|
|
if (msg->msg_name) {
|
if (msg->msg_namelen != sizeof(struct sockaddr_ipc))
|
return -EINVAL;
|
|
/* Fetch the destination address to send to. */
|
if (rtipc_get_arg(fd, &daddr, msg->msg_name, sizeof(daddr)))
|
return -EFAULT;
|
|
if (daddr.sipc_port < 0 ||
|
daddr.sipc_port >= CONFIG_XENO_OPT_IDDP_NRPORT)
|
return -EINVAL;
|
} else {
|
if (msg->msg_namelen != 0)
|
return -EINVAL;
|
daddr = sk->peer;
|
if (daddr.sipc_port < 0)
|
return -EDESTADDRREQ;
|
}
|
|
if (msg->msg_iovlen >= UIO_MAXIOV)
|
return -EINVAL;
|
|
/* Copy I/O vector in */
|
ret = rtdm_get_iovec(fd, &iov, msg, iov_fast);
|
if (ret)
|
return ret;
|
|
ret = __iddp_sendmsg(fd, iov, msg->msg_iovlen, flags, &daddr);
|
if (ret <= 0) {
|
rtdm_drop_iovec(iov, iov_fast);
|
return ret;
|
}
|
|
/* Copy updated I/O vector back */
|
return rtdm_put_iovec(fd, iov, msg, iov_fast) ?: ret;
|
}
|
|
static ssize_t iddp_write(struct rtdm_fd *fd,
|
const void *buf, size_t len)
|
{
|
struct rtipc_private *priv = rtdm_fd_to_private(fd);
|
struct iovec iov = { .iov_base = (void *)buf, .iov_len = len };
|
struct iddp_socket *sk = priv->state;
|
|
if (sk->peer.sipc_port < 0)
|
return -EDESTADDRREQ;
|
|
return __iddp_sendmsg(fd, &iov, 1, 0, &sk->peer);
|
}
|
|
static int __iddp_bind_socket(struct rtdm_fd *fd,
|
struct sockaddr_ipc *sa)
|
{
|
struct rtipc_private *priv = rtdm_fd_to_private(fd);
|
struct iddp_socket *sk = priv->state;
|
int ret = 0, port;
|
rtdm_lockctx_t s;
|
void *poolmem;
|
size_t poolsz;
|
|
if (sa->sipc_family != AF_RTIPC)
|
return -EINVAL;
|
|
if (sa->sipc_port < -1 ||
|
sa->sipc_port >= CONFIG_XENO_OPT_IDDP_NRPORT)
|
return -EINVAL;
|
|
cobalt_atomic_enter(s);
|
if (test_bit(_IDDP_BOUND, &sk->status) ||
|
__test_and_set_bit(_IDDP_BINDING, &sk->status))
|
ret = -EADDRINUSE;
|
cobalt_atomic_leave(s);
|
if (ret)
|
return ret;
|
|
/* Will auto-select a free port number if unspec (-1). */
|
port = sa->sipc_port;
|
cobalt_atomic_enter(s);
|
port = xnmap_enter(portmap, port, fd);
|
cobalt_atomic_leave(s);
|
if (port < 0)
|
return port == -EEXIST ? -EADDRINUSE : -ENOMEM;
|
|
sa->sipc_port = port;
|
|
/*
|
* Allocate a local buffer pool if we were told to do so via
|
* setsockopt() before we got there.
|
*/
|
poolsz = sk->poolsz;
|
if (poolsz > 0) {
|
poolsz = PAGE_ALIGN(poolsz);
|
poolmem = xnheap_vmalloc(poolsz);
|
if (poolmem == NULL) {
|
ret = -ENOMEM;
|
goto fail;
|
}
|
|
ret = xnheap_init(&sk->privpool, poolmem, poolsz);
|
if (ret) {
|
xnheap_vfree(poolmem);
|
goto fail;
|
}
|
xnheap_set_name(&sk->privpool, "iddp-pool@%d", port);
|
sk->poolwaitq = &sk->privwaitq;
|
sk->bufpool = &sk->privpool;
|
}
|
|
sk->name = *sa;
|
/* Set default destination if unset at binding time. */
|
if (sk->peer.sipc_port < 0)
|
sk->peer = *sa;
|
|
if (*sk->label) {
|
ret = xnregistry_enter(sk->label, sk,
|
&sk->handle, &__iddp_pnode.node);
|
if (ret) {
|
if (poolsz > 0) {
|
xnheap_destroy(&sk->privpool);
|
xnheap_vfree(poolmem);
|
}
|
goto fail;
|
}
|
}
|
|
cobalt_atomic_enter(s);
|
__clear_bit(_IDDP_BINDING, &sk->status);
|
__set_bit(_IDDP_BOUND, &sk->status);
|
if (xnselect_signal(&priv->send_block, POLLOUT))
|
xnsched_run();
|
cobalt_atomic_leave(s);
|
|
return 0;
|
fail:
|
xnmap_remove(portmap, port);
|
clear_bit(_IDDP_BINDING, &sk->status);
|
|
return ret;
|
}
|
|
static int __iddp_connect_socket(struct iddp_socket *sk,
|
struct sockaddr_ipc *sa)
|
{
|
struct sockaddr_ipc _sa;
|
struct iddp_socket *rsk;
|
int ret, resched = 0;
|
rtdm_lockctx_t s;
|
xnhandle_t h;
|
|
if (sa == NULL) {
|
_sa = nullsa;
|
sa = &_sa;
|
goto set_assoc;
|
}
|
|
if (sa->sipc_family != AF_RTIPC)
|
return -EINVAL;
|
|
if (sa->sipc_port < -1 ||
|
sa->sipc_port >= CONFIG_XENO_OPT_IDDP_NRPORT)
|
return -EINVAL;
|
/*
|
* - If a valid sipc_port is passed in the [0..NRPORT-1] range,
|
* it is used verbatim and the connection succeeds
|
* immediately, regardless of whether the destination is
|
* bound at the time of the call.
|
*
|
* - If sipc_port is -1 and a label was set via IDDP_LABEL,
|
* connect() blocks for the requested amount of time (see
|
* SO_RCVTIMEO) until a socket is bound to the same label.
|
*
|
* - If sipc_port is -1 and no label is given, the default
|
* destination address is cleared, meaning that any subsequent
|
* write() to the socket will return -EDESTADDRREQ, until a
|
* valid destination address is set via connect() or bind().
|
*
|
* - In all other cases, -EINVAL is returned.
|
*/
|
if (sa->sipc_port < 0 && *sk->label) {
|
ret = xnregistry_bind(sk->label,
|
sk->rx_timeout, XN_RELATIVE, &h);
|
if (ret)
|
return ret;
|
|
cobalt_atomic_enter(s);
|
rsk = xnregistry_lookup(h, NULL);
|
if (rsk == NULL || rsk->magic != IDDP_SOCKET_MAGIC)
|
ret = -EINVAL;
|
else {
|
/* Fetch labeled port number. */
|
sa->sipc_port = rsk->name.sipc_port;
|
resched = xnselect_signal(&sk->priv->send_block, POLLOUT);
|
}
|
cobalt_atomic_leave(s);
|
if (ret)
|
return ret;
|
} else if (sa->sipc_port < 0)
|
sa = &nullsa;
|
set_assoc:
|
cobalt_atomic_enter(s);
|
if (!test_bit(_IDDP_BOUND, &sk->status))
|
/* Set default name. */
|
sk->name = *sa;
|
/* Set default destination. */
|
sk->peer = *sa;
|
if (sa->sipc_port < 0)
|
__clear_bit(_IDDP_CONNECTED, &sk->status);
|
else
|
__set_bit(_IDDP_CONNECTED, &sk->status);
|
if (resched)
|
xnsched_run();
|
cobalt_atomic_leave(s);
|
|
return 0;
|
}
|
|
static int __iddp_setsockopt(struct iddp_socket *sk,
|
struct rtdm_fd *fd,
|
void *arg)
|
{
|
struct _rtdm_setsockopt_args sopt;
|
struct rtipc_port_label plabel;
|
struct __kernel_old_timeval tv;
|
rtdm_lockctx_t s;
|
size_t len;
|
int ret;
|
|
ret = rtipc_get_sockoptin(fd, &sopt, arg);
|
if (ret)
|
return ret;
|
|
if (sopt.level == SOL_SOCKET) {
|
switch (sopt.optname) {
|
|
case SO_RCVTIMEO_OLD:
|
ret = rtipc_get_timeval(fd, &tv, sopt.optval, sopt.optlen);
|
if (ret)
|
return ret;
|
sk->rx_timeout = rtipc_timeval_to_ns(&tv);
|
break;
|
|
case SO_SNDTIMEO_OLD:
|
ret = rtipc_get_timeval(fd, &tv, sopt.optval, sopt.optlen);
|
if (ret)
|
return ret;
|
sk->tx_timeout = rtipc_timeval_to_ns(&tv);
|
break;
|
|
default:
|
ret = -EINVAL;
|
}
|
|
return ret;
|
}
|
|
if (sopt.level != SOL_IDDP)
|
return -ENOPROTOOPT;
|
|
switch (sopt.optname) {
|
|
case IDDP_POOLSZ:
|
ret = rtipc_get_length(fd, &len, sopt.optval, sopt.optlen);
|
if (ret)
|
return ret;
|
if (len == 0)
|
return -EINVAL;
|
cobalt_atomic_enter(s);
|
/*
|
* We may not do this more than once, and we have to
|
* do this before the first binding.
|
*/
|
if (test_bit(_IDDP_BOUND, &sk->status) ||
|
test_bit(_IDDP_BINDING, &sk->status))
|
ret = -EALREADY;
|
else
|
sk->poolsz = len;
|
cobalt_atomic_leave(s);
|
break;
|
|
case IDDP_LABEL:
|
if (sopt.optlen < sizeof(plabel))
|
return -EINVAL;
|
if (rtipc_get_arg(fd, &plabel, sopt.optval, sizeof(plabel)))
|
return -EFAULT;
|
cobalt_atomic_enter(s);
|
/*
|
* We may attach a label to a client socket which was
|
* previously bound in IDDP.
|
*/
|
if (test_bit(_IDDP_BINDING, &sk->status))
|
ret = -EALREADY;
|
else {
|
strcpy(sk->label, plabel.label);
|
sk->label[XNOBJECT_NAME_LEN-1] = 0;
|
}
|
cobalt_atomic_leave(s);
|
break;
|
|
default:
|
ret = -EINVAL;
|
}
|
|
return ret;
|
}
|
|
static int __iddp_getsockopt(struct iddp_socket *sk,
|
struct rtdm_fd *fd,
|
void *arg)
|
{
|
struct _rtdm_getsockopt_args sopt;
|
struct rtipc_port_label plabel;
|
struct __kernel_old_timeval tv;
|
rtdm_lockctx_t s;
|
socklen_t len;
|
int ret;
|
|
ret = rtipc_get_sockoptout(fd, &sopt, arg);
|
if (ret)
|
return ret;
|
|
ret = rtipc_get_arg(fd, &len, sopt.optlen, sizeof(len));
|
if (ret)
|
return ret;
|
|
if (sopt.level == SOL_SOCKET) {
|
switch (sopt.optname) {
|
|
case SO_RCVTIMEO_OLD:
|
rtipc_ns_to_timeval(&tv, sk->rx_timeout);
|
ret = rtipc_put_timeval(fd, sopt.optval, &tv, len);
|
if (ret)
|
return ret;
|
break;
|
|
case SO_SNDTIMEO_OLD:
|
rtipc_ns_to_timeval(&tv, sk->tx_timeout);
|
ret = rtipc_put_timeval(fd, sopt.optval, &tv, len);
|
if (ret)
|
return ret;
|
break;
|
|
default:
|
ret = -EINVAL;
|
}
|
|
return ret;
|
}
|
|
if (sopt.level != SOL_IDDP)
|
return -ENOPROTOOPT;
|
|
switch (sopt.optname) {
|
|
case IDDP_LABEL:
|
if (len < sizeof(plabel))
|
return -EINVAL;
|
cobalt_atomic_enter(s);
|
strcpy(plabel.label, sk->label);
|
cobalt_atomic_leave(s);
|
if (rtipc_put_arg(fd, sopt.optval, &plabel, sizeof(plabel)))
|
return -EFAULT;
|
break;
|
|
default:
|
ret = -EINVAL;
|
}
|
|
return ret;
|
}
|
|
static int __iddp_ioctl(struct rtdm_fd *fd,
|
unsigned int request, void *arg)
|
{
|
struct rtipc_private *priv = rtdm_fd_to_private(fd);
|
struct sockaddr_ipc saddr, *saddrp = &saddr;
|
struct iddp_socket *sk = priv->state;
|
int ret = 0;
|
|
switch (request) {
|
|
COMPAT_CASE(_RTIOC_CONNECT):
|
ret = rtipc_get_sockaddr(fd, &saddrp, arg);
|
if (ret)
|
return ret;
|
ret = __iddp_connect_socket(sk, saddrp);
|
break;
|
|
COMPAT_CASE(_RTIOC_BIND):
|
ret = rtipc_get_sockaddr(fd, &saddrp, arg);
|
if (ret)
|
return ret;
|
if (saddrp == NULL)
|
return -EFAULT;
|
ret = __iddp_bind_socket(fd, saddrp);
|
break;
|
|
COMPAT_CASE(_RTIOC_GETSOCKNAME):
|
ret = rtipc_put_sockaddr(fd, arg, &sk->name);
|
break;
|
|
COMPAT_CASE(_RTIOC_GETPEERNAME):
|
ret = rtipc_put_sockaddr(fd, arg, &sk->peer);
|
break;
|
|
COMPAT_CASE(_RTIOC_SETSOCKOPT):
|
ret = __iddp_setsockopt(sk, fd, arg);
|
break;
|
|
COMPAT_CASE(_RTIOC_GETSOCKOPT):
|
ret = __iddp_getsockopt(sk, fd, arg);
|
break;
|
|
case _RTIOC_LISTEN:
|
COMPAT_CASE(_RTIOC_ACCEPT):
|
ret = -EOPNOTSUPP;
|
break;
|
|
case _RTIOC_SHUTDOWN:
|
ret = -ENOTCONN;
|
break;
|
|
default:
|
ret = -EINVAL;
|
}
|
|
return ret;
|
}
|
|
static int iddp_ioctl(struct rtdm_fd *fd,
|
unsigned int request, void *arg)
|
{
|
int ret;
|
|
switch (request) {
|
COMPAT_CASE(_RTIOC_BIND):
|
if (rtdm_in_rt_context())
|
return -ENOSYS; /* Try downgrading to NRT */
|
fallthrough;
|
default:
|
ret = __iddp_ioctl(fd, request, arg);
|
}
|
|
return ret;
|
}
|
|
static int iddp_init(void)
|
{
|
portmap = xnmap_create(CONFIG_XENO_OPT_IDDP_NRPORT, 0, 0);
|
if (portmap == NULL)
|
return -ENOMEM;
|
|
rtdm_waitqueue_init(&poolwaitq);
|
|
return 0;
|
}
|
|
static void iddp_exit(void)
|
{
|
rtdm_waitqueue_destroy(&poolwaitq);
|
xnmap_delete(portmap);
|
}
|
|
static unsigned int iddp_pollstate(struct rtdm_fd *fd) /* atomic */
|
{
|
struct rtipc_private *priv = rtdm_fd_to_private(fd);
|
struct iddp_socket *sk = priv->state;
|
unsigned int mask = 0;
|
struct rtdm_fd *rfd;
|
|
if (test_bit(_IDDP_BOUND, &sk->status) && !list_empty(&sk->inq))
|
mask |= POLLIN;
|
|
/*
|
* If the socket is connected, POLLOUT means that the peer
|
* exists. Otherwise POLLOUT is always set, assuming the
|
* client is likely to use explicit addressing in send
|
* operations.
|
*
|
* If the peer exists, we still can't really know whether
|
* writing to the socket would block as it depends on the
|
* message size and other highly dynamic factors, so pretend
|
* it would not.
|
*/
|
if (test_bit(_IDDP_CONNECTED, &sk->status)) {
|
rfd = xnmap_fetch_nocheck(portmap, sk->peer.sipc_port);
|
if (rfd)
|
mask |= POLLOUT;
|
} else
|
mask |= POLLOUT;
|
|
return mask;
|
}
|
|
struct rtipc_protocol iddp_proto_driver = {
|
.proto_name = "iddp",
|
.proto_statesz = sizeof(struct iddp_socket),
|
.proto_init = iddp_init,
|
.proto_exit = iddp_exit,
|
.proto_ops = {
|
.socket = iddp_socket,
|
.close = iddp_close,
|
.recvmsg = iddp_recvmsg,
|
.sendmsg = iddp_sendmsg,
|
.read = iddp_read,
|
.write = iddp_write,
|
.ioctl = iddp_ioctl,
|
.pollstate = iddp_pollstate,
|
}
|
};
|
