Re: [libvirt] compile fail on FreeBSD

On 11/15/2011 04:08 AM, Daniel P. Berrange wrote: > On Fri, Nov 11, 2011 at 05:31:14PM -0700, Eric Blake wrote: >> This failure on FreeBSD 8.2 popped up this week, and I suspect Dan's >> virnetdev refactoring, but haven't had time to further investigate and >> fix it: >> >> util/virnetdev.c: In function 'virNetDevExists': >> util/virnetdev.c:93: error: storage size of 'ifr' isn't known >> util/virnetdev.c:95: warning: implicit declaration of function >> 'virNetDevSetupControl' >> >> and so on. Probably some conditional compilation going wrong when on a >> non-Linux machine. > > This code is protected by a > > #ifdef HAVE_NET_IF_H > > > So if BSD's net/if.h does not provide any 'struct ifreq' then we need to > fix things. <net/if.h> is standardized by POSIX, but 'struct ifreq' is not (the only portable struct in that header is 'struct if_nameindex'). > > Does anyone know if the 'struct ifreq' / SIOCGIFHWADDR / SIOCGIFMTU / etc > ioctl() stuff is entirely Linux specific, or is it semi portable to other > UNIX ? Solaris 10 has struct ifreq, also provided by <net/if.h>, but with different fields: Linux: struct ifreq { union { char ifrn_name[16]; } ifr_ifrn; union { struct sockaddr ifru_addr; struct sockaddr ifru_dstaddr; struct sockaddr ifru_broadaddr; struct sockaddr ifru_netmask; struct sockaddr ifru_hwaddr; short int ifru_flags; int ifru_ivalue; int ifru_mtu; struct ifmap ifru_map; char ifru_slave[16]; char ifru_newname[16]; __caddr_t ifru_data; } ifr_ifru; }; Solaris: struct ifreq { char ifr_name[16]; union { struct sockaddr ifru_addr; struct sockaddr ifru_dstaddr; char ifru_oname[16]; struct sockaddr ifru_broadaddr; int ifru_index; short ifru_flags; int ifru_metric; char ifru_data[1]; char ifru_enaddr[6]; int if_muxid[2]; struct ifr_ppaflags { short ifrup_flags; short ifrup_filler; uint_t ifrup_ppa; } ifru_ppaflags; struct ifr_dnld_reqs { uint32_t v_addr; uint32_t m_addr; uint32_t ex_addr; uint32_t size; } ifru_dnld_req; struct ifr_fddi_stats { uint32_t stat_size; uint32_t fddi_stats; } ifru_fddi_stat; struct ifr_netmapents { uint32_t map_ent_size, entry_number; uint32_t fddi_map_ent; } ifru_netmapent; struct ifr_fddi_gen_struct { uint32_t ifru_fddi_gioctl; uint32_t ifru_fddi_gaddr; } ifru_fddi_gstruct; } ifr_ifru; }; ifr_name is common between the two, but I'm thinking the ioctl's are going to be Linux-specific, so we're better off conditionalizing the code to not even attempt use of 'struct ifreq' outside Linux.