mirror of https://gitee.com/openkylin/qemu.git
98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* 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, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef FD_TRANS_H
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#define FD_TRANS_H
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typedef abi_long (*TargetFdDataFunc)(void *, size_t);
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typedef abi_long (*TargetFdAddrFunc)(void *, abi_ulong, socklen_t);
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typedef struct TargetFdTrans {
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TargetFdDataFunc host_to_target_data;
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TargetFdDataFunc target_to_host_data;
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TargetFdAddrFunc target_to_host_addr;
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} TargetFdTrans;
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extern TargetFdTrans **target_fd_trans;
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extern unsigned int target_fd_max;
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static inline TargetFdDataFunc fd_trans_target_to_host_data(int fd)
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{
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if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
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return target_fd_trans[fd]->target_to_host_data;
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}
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return NULL;
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}
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static inline TargetFdDataFunc fd_trans_host_to_target_data(int fd)
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{
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if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
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return target_fd_trans[fd]->host_to_target_data;
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}
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return NULL;
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}
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static inline TargetFdAddrFunc fd_trans_target_to_host_addr(int fd)
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{
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if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
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return target_fd_trans[fd]->target_to_host_addr;
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}
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return NULL;
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}
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static inline void fd_trans_register(int fd, TargetFdTrans *trans)
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{
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unsigned int oldmax;
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if (fd >= target_fd_max) {
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oldmax = target_fd_max;
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target_fd_max = ((fd >> 6) + 1) << 6; /* by slice of 64 entries */
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target_fd_trans = g_renew(TargetFdTrans *,
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target_fd_trans, target_fd_max);
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memset((void *)(target_fd_trans + oldmax), 0,
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(target_fd_max - oldmax) * sizeof(TargetFdTrans *));
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}
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target_fd_trans[fd] = trans;
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}
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static inline void fd_trans_unregister(int fd)
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{
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if (fd >= 0 && fd < target_fd_max) {
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target_fd_trans[fd] = NULL;
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}
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}
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static inline void fd_trans_dup(int oldfd, int newfd)
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{
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fd_trans_unregister(newfd);
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if (oldfd < target_fd_max && target_fd_trans[oldfd]) {
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fd_trans_register(newfd, target_fd_trans[oldfd]);
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}
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}
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extern TargetFdTrans target_packet_trans;
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#ifdef CONFIG_RTNETLINK
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extern TargetFdTrans target_netlink_route_trans;
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#endif
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extern TargetFdTrans target_netlink_audit_trans;
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extern TargetFdTrans target_signalfd_trans;
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extern TargetFdTrans target_eventfd_trans;
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#if (defined(TARGET_NR_inotify_init) && defined(__NR_inotify_init)) || \
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(defined(CONFIG_INOTIFY1) && defined(TARGET_NR_inotify_init1) && \
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defined(__NR_inotify_init1))
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extern TargetFdTrans target_inotify_trans;
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#endif
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#endif
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