Re: [Xen-devel] Transactions and watches

[Jacob Gorm Hansen <jacobg@xxxxxxx>]

Hmm it is not too simple, but if I run the code below as is, domU
succeeds in connecting netfront<->netback, e.g. there is no timeout
and the
MAC address is set correctly. If I rem in the xs_transaction_* calls,
the backend does not get the probe callback and nothing works.

Similar is true if I wrap each xs_write in a transaction_start-end pair.

    char s[256];
    char s2[256];

    int vifid = 2000 + domid;

    char* dom0_home = xs_get_domain_path(xs,0);
    printf("dom0_home is %s\n",dom0_home);

    char backend[256];
    char frontend[256];
    sprintf(backend,"%s/backend/vif/%d/%d",dom0_home,vifid,domid);
    sprintf(frontend, "%s/device/vif/%d",home,vifid);


    //xs_transaction_start(xs);

    sprintf(s,"%s/frontend",backend);
    xs_w(s, frontend );

    sprintf(s,"%s/frontend-id",backend);
    sprintf(s2,"%d",domid);
    xs_w(s, s2 );

    sprintf(s,"%s/handle",backend);
    sprintf(s2,"%d",vifid);
    xs_w(s, s2);


    //xs_transaction_end(xs,0);

    //xs_transaction_start(xs);


    sprintf(s, "%s/backend-id", frontend);
    xs_w(s, "0");

    sprintf(s,"%s/backend",frontend);
    xs_w(s, backend );

    sprintf(s,"%s/handle",frontend);
    sprintf(s2,"%d",vifid);
    xs_w(s, s2);

    sprintf(s,"%s/mac",frontend);
    xs_w(s, "aa:00:00:11:a6:02");

    //xs_transaction_end(xs,0);

Jacob

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