qemu

FORK: QEMU emulator
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filter-replay.c (2530B)

      1 /*
      2  * filter-replay.c
      3  *
      4  * Copyright (c) 2010-2016 Institute for System Programming
      5  *                         of the Russian Academy of Sciences.
      6  *
      7  * This work is licensed under the terms of the GNU GPL, version 2 or later.
      8  * See the COPYING file in the top-level directory.
      9  *
     10  */
     11 
     12 #include "qemu/osdep.h"
     13 #include "clients.h"
     14 #include "qemu/error-report.h"
     15 #include "qemu/iov.h"
     16 #include "qemu/module.h"
     17 #include "qemu/timer.h"
     18 #include "qapi/visitor.h"
     19 #include "net/filter.h"
     20 #include "sysemu/replay.h"
     21 #include "qom/object.h"
     22 
     23 #define TYPE_FILTER_REPLAY "filter-replay"
     24 
     25 OBJECT_DECLARE_SIMPLE_TYPE(NetFilterReplayState, FILTER_REPLAY)
     26 
     27 struct NetFilterReplayState {
     28     NetFilterState nfs;
     29     ReplayNetState *rns;
     30 };
     31 
     32 static ssize_t filter_replay_receive_iov(NetFilterState *nf,
     33                                          NetClientState *sndr,
     34                                          unsigned flags,
     35                                          const struct iovec *iov,
     36                                          int iovcnt, NetPacketSent *sent_cb)
     37 {
     38     NetFilterReplayState *nfrs = FILTER_REPLAY(nf);
     39     switch (replay_mode) {
     40     case REPLAY_MODE_RECORD:
     41         if (nf->netdev == sndr) {
     42             replay_net_packet_event(nfrs->rns, flags, iov, iovcnt);
     43             return iov_size(iov, iovcnt);
     44         }
     45         return 0;
     46     case REPLAY_MODE_PLAY:
     47         /* Drop all packets in replay mode.
     48            Packets from the log will be injected by the replay module. */
     49         return iov_size(iov, iovcnt);
     50     default:
     51         /* Pass all the packets. */
     52         return 0;
     53     }
     54 }
     55 
     56 static void filter_replay_instance_init(Object *obj)
     57 {
     58     NetFilterReplayState *nfrs = FILTER_REPLAY(obj);
     59     nfrs->rns = replay_register_net(&nfrs->nfs);
     60 }
     61 
     62 static void filter_replay_instance_finalize(Object *obj)
     63 {
     64     NetFilterReplayState *nfrs = FILTER_REPLAY(obj);
     65     replay_unregister_net(nfrs->rns);
     66 }
     67 
     68 static void filter_replay_class_init(ObjectClass *oc, void *data)
     69 {
     70     NetFilterClass *nfc = NETFILTER_CLASS(oc);
     71 
     72     nfc->receive_iov = filter_replay_receive_iov;
     73 }
     74 
     75 static const TypeInfo filter_replay_info = {
     76     .name = TYPE_FILTER_REPLAY,
     77     .parent = TYPE_NETFILTER,
     78     .class_init = filter_replay_class_init,
     79     .instance_init = filter_replay_instance_init,
     80     .instance_finalize = filter_replay_instance_finalize,
     81     .instance_size = sizeof(NetFilterReplayState),
     82 };
     83 
     84 static void filter_replay_register_types(void)
     85 {
     86     type_register_static(&filter_replay_info);
     87 }
     88 
     89 type_init(filter_replay_register_types);