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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef FD_TRANS_H
#define FD_TRANS_H
#include "qemu/lockable.h"
typedef abi_long (*TargetFdDataFunc)(void *, size_t);
typedef abi_long (*TargetFdAddrFunc)(void *, abi_ulong, socklen_t);
typedef struct TargetFdTrans {
TargetFdDataFunc host_to_target_data;
TargetFdDataFunc target_to_host_data;
TargetFdAddrFunc target_to_host_addr;
} TargetFdTrans;
extern TargetFdTrans **target_fd_trans;
extern QemuMutex target_fd_trans_lock;
extern unsigned int target_fd_max;
static inline void fd_trans_init(void)
{
qemu_mutex_init(&target_fd_trans_lock);
}
static inline void fd_trans_prefork(void)
{
qemu_mutex_lock(&target_fd_trans_lock);
}
static inline void fd_trans_postfork(void)
{
qemu_mutex_unlock(&target_fd_trans_lock);
}
static inline TargetFdDataFunc fd_trans_target_to_host_data(int fd)
{
if (fd < 0) {
return NULL;
}
QEMU_LOCK_GUARD(&target_fd_trans_lock);
if (fd < target_fd_max && target_fd_trans[fd]) {
return target_fd_trans[fd]->target_to_host_data;
}
return NULL;
}
static inline TargetFdDataFunc fd_trans_host_to_target_data(int fd)
{
if (fd < 0) {
return NULL;
}
QEMU_LOCK_GUARD(&target_fd_trans_lock);
if (fd < target_fd_max && target_fd_trans[fd]) {
return target_fd_trans[fd]->host_to_target_data;
}
return NULL;
}
static inline TargetFdAddrFunc fd_trans_target_to_host_addr(int fd)
{
if (fd < 0) {
return NULL;
}
QEMU_LOCK_GUARD(&target_fd_trans_lock);
if (fd < target_fd_max && target_fd_trans[fd]) {
return target_fd_trans[fd]->target_to_host_addr;
}
return NULL;
}
static inline void internal_fd_trans_register_unsafe(int fd,
TargetFdTrans *trans)
{
unsigned int oldmax;
if (fd >= target_fd_max) {
oldmax = target_fd_max;
target_fd_max = ((fd >> 6) + 1) << 6; /* by slice of 64 entries */
target_fd_trans = g_renew(TargetFdTrans *,
target_fd_trans, target_fd_max);
memset((void *)(target_fd_trans + oldmax), 0,
(target_fd_max - oldmax) * sizeof(TargetFdTrans *));
}
target_fd_trans[fd] = trans;
}
static inline void fd_trans_register(int fd, TargetFdTrans *trans)
{
QEMU_LOCK_GUARD(&target_fd_trans_lock);
internal_fd_trans_register_unsafe(fd, trans);
}
static inline void internal_fd_trans_unregister_unsafe(int fd)
{
if (fd >= 0 && fd < target_fd_max) {
target_fd_trans[fd] = NULL;
}
}
static inline void fd_trans_unregister(int fd)
{
if (fd < 0) {
return;
}
QEMU_LOCK_GUARD(&target_fd_trans_lock);
internal_fd_trans_unregister_unsafe(fd);
}
static inline void fd_trans_dup(int oldfd, int newfd)
{
QEMU_LOCK_GUARD(&target_fd_trans_lock);
internal_fd_trans_unregister_unsafe(newfd);
if (oldfd < target_fd_max && target_fd_trans[oldfd]) {
internal_fd_trans_register_unsafe(newfd, target_fd_trans[oldfd]);
}
}
extern TargetFdTrans target_packet_trans;
#ifdef CONFIG_RTNETLINK
extern TargetFdTrans target_netlink_route_trans;
#endif
extern TargetFdTrans target_netlink_audit_trans;
extern TargetFdTrans target_signalfd_trans;
extern TargetFdTrans target_eventfd_trans;
extern TargetFdTrans target_timerfd_trans;
#if (defined(TARGET_NR_inotify_init) && defined(__NR_inotify_init)) || \
(defined(CONFIG_INOTIFY1) && defined(TARGET_NR_inotify_init1) && \
defined(__NR_inotify_init1))
extern TargetFdTrans target_inotify_trans;
#endif
#endif
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