RE: [PATCH V6 5/6] net/colo-compare: Add passthrough list to CompareState

["Zhang, Chen" <chen.zhang@intel.com>]

> -----Original Message-----
> From: Lukas Straub <lukasstraub2@web.de>
> Sent: Tuesday, May 18, 2021 4:07 AM
> To: Zhang, Chen <chen.zhang@intel.com>
> Cc: Jason Wang <jasowang@redhat.com>; qemu-dev <qemu-
> devel@nongnu.org>; Eric Blake <eblake@redhat.com>; Dr. David Alan
> Gilbert <dgilbert@redhat.com>; Markus Armbruster <armbru@redhat.com>;
> Daniel P. Berrangé <berrange@redhat.com>; Gerd Hoffmann
> <kraxel@redhat.com>; Li Zhijian <lizhijian@cn.fujitsu.com>; Zhang Chen
> <zhangckid@gmail.com>
> Subject: Re: [PATCH V6 5/6] net/colo-compare: Add passthrough list to
> CompareState
> 
> On Tue, 20 Apr 2021 23:15:36 +0800
> Zhang Chen <chen.zhang@intel.com> wrote:
> 
> > Add passthrough list for each CompareState.
> >
> > Signed-off-by: Zhang Chen <chen.zhang@intel.com>
> > ---
> >  net/colo-compare.c | 28 ++++++++++++++++++++++++++++
> > net/colo-compare.h | 12 ++++++++++++
> >  2 files changed, 40 insertions(+)
> >
> > diff --git a/net/colo-compare.c b/net/colo-compare.c index
> > b51b1437ef..7109e2ed30 100644
> > --- a/net/colo-compare.c
> > +++ b/net/colo-compare.c
> > @@ -141,6 +141,7 @@ static int packet_enqueue(CompareState *s, int
> mode, Connection **con)
> >      ConnectionKey key;
> >      Packet *pkt = NULL;
> >      Connection *conn;
> > +    COLOPassthroughEntry *pass, *next;
> >      int ret;
> >
> >      if (mode == PRIMARY_IN) {
> > @@ -160,6 +161,31 @@ static int packet_enqueue(CompareState *s, int
> mode, Connection **con)
> >      }
> >      fill_connection_key(pkt, &key);
> >
> > +    /* Check COLO passthrough specifications */
> > +    qemu_mutex_lock(&s->passthroughlist_mutex);
> > +    if (!QLIST_EMPTY(&s->passthroughlist)) {
> > +        QLIST_FOREACH_SAFE(pass, &s->passthroughlist, node, next) {
> > +            if (key.ip_proto == pass->l4_protocol->p_proto) {
> > +                if (pass->src_port == 0 || pass->src_port == key.dst_port) {
> > +                    if (pass->src_ip.s_addr == 0 ||
> > +                        pass->src_ip.s_addr == key.src.s_addr) {
> > +                        if (pass->dst_port == 0 ||
> > +                            pass->dst_port == key.src_port) {
> > +                            if (pass->dst_ip.s_addr == 0 ||
> > +                                pass->dst_ip.s_addr == key.dst.s_addr) {
> > +                                packet_destroy(pkt, NULL);
> > +                                pkt = NULL;
> > +                                qemu_mutex_unlock(&s->passthroughlist_mutex);
> > +                                return -1;
> > +                            }
> > +                        }
> > +                    }
> > +                }
> > +            }
> > +        }
> > +    }
> > +    qemu_mutex_unlock(&s->passthroughlist_mutex);
> > +
> >      conn = connection_get(s->connection_track_table,
> >                            &key,
> >                            &s->conn_list); @@ -1225,6 +1251,7 @@
> > static void colo_compare_complete(UserCreatable *uc, Error **errp)
> >      }
> >
> >      g_queue_init(&s->conn_list);
> > +    QLIST_INIT(&s->passthroughlist);
> >
> >      s->connection_track_table =
> g_hash_table_new_full(connection_key_hash,
> >
> > connection_key_equal, @@ -1237,6 +1264,7 @@ static void
> colo_compare_complete(UserCreatable *uc, Error **errp)
> >      if (!colo_compare_active) {
> >          qemu_mutex_init(&event_mtx);
> >          qemu_cond_init(&event_complete_cond);
> > +        qemu_mutex_init(&s->passthroughlist_mutex);
> 
> This initializes the mutex only for the first colo-compare object that is created.
> The mutex has to be initialized every time, as it separate for each colo-
> compare object.

Good catch. I will fix it in the V7.

Thanks
Chen

> 
> >          colo_compare_active = true;
> >      }
> >      QTAILQ_INSERT_TAIL(&net_compares, s, next); diff --git
> > a/net/colo-compare.h b/net/colo-compare.h index
> ab649c9dbe..7ca74de840
> > 100644
> > --- a/net/colo-compare.h
> > +++ b/net/colo-compare.h
> > @@ -23,6 +23,7 @@
> >  #include "migration/migration.h"
> >  #include "sysemu/iothread.h"
> >  #include "colo.h"
> > +#include <netdb.h>
> >
> >  #define TYPE_COLO_COMPARE "colo-compare"
> >  typedef struct CompareState CompareState; @@ -54,6 +55,15 @@
> typedef
> > struct COLOSendEntry {
> >      uint8_t *buf;
> >  } COLOSendEntry;
> >
> > +typedef struct COLOPassthroughEntry {
> > +    struct protoent *l4_protocol;
> > +    int src_port;
> > +    int dst_port;
> > +    struct in_addr src_ip;
> > +    struct in_addr dst_ip;
> > +    QLIST_ENTRY(COLOPassthroughEntry) node; } COLOPassthroughEntry;
> > +
> >  /*
> >   *  + CompareState ++
> >   *  |               |
> > @@ -110,6 +120,8 @@ struct CompareState {
> >
> >      QEMUBH *event_bh;
> >      enum colo_event event;
> > +    QLIST_HEAD(, COLOPassthroughEntry) passthroughlist;
> > +    QemuMutex passthroughlist_mutex;
> >
> >      QTAILQ_ENTRY(CompareState) next;
> >  };
> 
> 
> 
> --