LXR qemu/linux-user/fd-trans.h

   1/*
   2 *  This program is free software; you can redistribute it and/or modify
   3 *  it under the terms of the GNU General Public License as published by
   4 *  the Free Software Foundation; either version 2 of the License, or
   5 *  (at your option) any later version.
   6 *
   7 *  This program is distributed in the hope that it will be useful,
   8 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   9 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10 *  GNU General Public License for more details.
  11 *
  12 *  You should have received a copy of the GNU General Public License
  13 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  14 */
  15
  16#ifndef FD_TRANS_H
  17#define FD_TRANS_H
  18
  19typedef abi_long (*TargetFdDataFunc)(void *, size_t);
  20typedef abi_long (*TargetFdAddrFunc)(void *, abi_ulong, socklen_t);
  21typedef struct TargetFdTrans {
  22    TargetFdDataFunc host_to_target_data;
  23    TargetFdDataFunc target_to_host_data;
  24    TargetFdAddrFunc target_to_host_addr;
  25} TargetFdTrans;
  26
  27extern TargetFdTrans **target_fd_trans;
  28
  29extern unsigned int target_fd_max;
  30
  31static inline TargetFdDataFunc fd_trans_target_to_host_data(int fd)
  32{
  33    if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
  34        return target_fd_trans[fd]->target_to_host_data;
  35    }
  36    return NULL;
  37}
  38
  39static inline TargetFdDataFunc fd_trans_host_to_target_data(int fd)
  40{
  41    if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
  42        return target_fd_trans[fd]->host_to_target_data;
  43    }
  44    return NULL;
  45}
  46
  47static inline TargetFdAddrFunc fd_trans_target_to_host_addr(int fd)
  48{
  49    if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
  50        return target_fd_trans[fd]->target_to_host_addr;
  51    }
  52    return NULL;
  53}
  54
  55static inline void fd_trans_register(int fd, TargetFdTrans *trans)
  56{
  57    unsigned int oldmax;
  58
  59    if (fd >= target_fd_max) {
  60        oldmax = target_fd_max;
  61        target_fd_max = ((fd >> 6) + 1) << 6; /* by slice of 64 entries */
  62        target_fd_trans = g_renew(TargetFdTrans *,
  63                                  target_fd_trans, target_fd_max);
  64        memset((void *)(target_fd_trans + oldmax), 0,
  65               (target_fd_max - oldmax) * sizeof(TargetFdTrans *));
  66    }
  67    target_fd_trans[fd] = trans;
  68}
  69
  70static inline void fd_trans_unregister(int fd)
  71{
  72    if (fd >= 0 && fd < target_fd_max) {
  73        target_fd_trans[fd] = NULL;
  74    }
  75}
  76
  77static inline void fd_trans_dup(int oldfd, int newfd)
  78{
  79    fd_trans_unregister(newfd);
  80    if (oldfd < target_fd_max && target_fd_trans[oldfd]) {
  81        fd_trans_register(newfd, target_fd_trans[oldfd]);
  82    }
  83}
  84
  85extern TargetFdTrans target_packet_trans;
  86#ifdef CONFIG_RTNETLINK
  87extern TargetFdTrans target_netlink_route_trans;
  88#endif
  89extern TargetFdTrans target_netlink_audit_trans;
  90extern TargetFdTrans target_signalfd_trans;
  91extern TargetFdTrans target_eventfd_trans;
  92#if (defined(TARGET_NR_inotify_init) && defined(__NR_inotify_init)) || \
  93    (defined(CONFIG_INOTIFY1) && defined(TARGET_NR_inotify_init1) && \
  94     defined(__NR_inotify_init1))
  95extern TargetFdTrans target_inotify_trans;
  96#endif
  97#endif
  98