linux-user: move TargetFdTrans functions to their own file

This will ease to move out syscall functions from syscall.c

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180823222215.13781-1-laurent@vivier.eu>

1 files changed, 1409 insertions, 0 deletions

diff --git a/linux-user/fd-trans.c b/linux-user/fd-trans.c
new file mode 100644
index 0000000000..216b9f0614
--- /dev/null
+++ b/linux-user/fd-trans.c
@@ -0,0 +1,1409 @@
+/*
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+
+#include <sys/signalfd.h>
+#include <linux/unistd.h>
+#include <linux/audit.h>
+#ifdef CONFIG_INOTIFY
+#include <sys/inotify.h>
+#endif
+#include <linux/netlink.h>
+#ifdef CONFIG_RTNETLINK
+#include <linux/rtnetlink.h>
+#include <linux/if_bridge.h>
+#endif
+#include "qemu.h"
+#include "fd-trans.h"
+
+enum {
+    QEMU_IFLA_BR_UNSPEC,
+    QEMU_IFLA_BR_FORWARD_DELAY,
+    QEMU_IFLA_BR_HELLO_TIME,
+    QEMU_IFLA_BR_MAX_AGE,
+    QEMU_IFLA_BR_AGEING_TIME,
+    QEMU_IFLA_BR_STP_STATE,
+    QEMU_IFLA_BR_PRIORITY,
+    QEMU_IFLA_BR_VLAN_FILTERING,
+    QEMU_IFLA_BR_VLAN_PROTOCOL,
+    QEMU_IFLA_BR_GROUP_FWD_MASK,
+    QEMU_IFLA_BR_ROOT_ID,
+    QEMU_IFLA_BR_BRIDGE_ID,
+    QEMU_IFLA_BR_ROOT_PORT,
+    QEMU_IFLA_BR_ROOT_PATH_COST,
+    QEMU_IFLA_BR_TOPOLOGY_CHANGE,
+    QEMU_IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
+    QEMU_IFLA_BR_HELLO_TIMER,
+    QEMU_IFLA_BR_TCN_TIMER,
+    QEMU_IFLA_BR_TOPOLOGY_CHANGE_TIMER,
+    QEMU_IFLA_BR_GC_TIMER,
+    QEMU_IFLA_BR_GROUP_ADDR,
+    QEMU_IFLA_BR_FDB_FLUSH,
+    QEMU_IFLA_BR_MCAST_ROUTER,
+    QEMU_IFLA_BR_MCAST_SNOOPING,
+    QEMU_IFLA_BR_MCAST_QUERY_USE_IFADDR,
+    QEMU_IFLA_BR_MCAST_QUERIER,
+    QEMU_IFLA_BR_MCAST_HASH_ELASTICITY,
+    QEMU_IFLA_BR_MCAST_HASH_MAX,
+    QEMU_IFLA_BR_MCAST_LAST_MEMBER_CNT,
+    QEMU_IFLA_BR_MCAST_STARTUP_QUERY_CNT,
+    QEMU_IFLA_BR_MCAST_LAST_MEMBER_INTVL,
+    QEMU_IFLA_BR_MCAST_MEMBERSHIP_INTVL,
+    QEMU_IFLA_BR_MCAST_QUERIER_INTVL,
+    QEMU_IFLA_BR_MCAST_QUERY_INTVL,
+    QEMU_IFLA_BR_MCAST_QUERY_RESPONSE_INTVL,
+    QEMU_IFLA_BR_MCAST_STARTUP_QUERY_INTVL,
+    QEMU_IFLA_BR_NF_CALL_IPTABLES,
+    QEMU_IFLA_BR_NF_CALL_IP6TABLES,
+    QEMU_IFLA_BR_NF_CALL_ARPTABLES,
+    QEMU_IFLA_BR_VLAN_DEFAULT_PVID,
+    QEMU_IFLA_BR_PAD,
+    QEMU_IFLA_BR_VLAN_STATS_ENABLED,
+    QEMU_IFLA_BR_MCAST_STATS_ENABLED,
+    QEMU_IFLA_BR_MCAST_IGMP_VERSION,
+    QEMU_IFLA_BR_MCAST_MLD_VERSION,
+    QEMU___IFLA_BR_MAX,
+};
+
+enum {
+    QEMU_IFLA_UNSPEC,
+    QEMU_IFLA_ADDRESS,
+    QEMU_IFLA_BROADCAST,
+    QEMU_IFLA_IFNAME,
+    QEMU_IFLA_MTU,
+    QEMU_IFLA_LINK,
+    QEMU_IFLA_QDISC,
+    QEMU_IFLA_STATS,
+    QEMU_IFLA_COST,
+    QEMU_IFLA_PRIORITY,
+    QEMU_IFLA_MASTER,
+    QEMU_IFLA_WIRELESS,
+    QEMU_IFLA_PROTINFO,
+    QEMU_IFLA_TXQLEN,
+    QEMU_IFLA_MAP,
+    QEMU_IFLA_WEIGHT,
+    QEMU_IFLA_OPERSTATE,
+    QEMU_IFLA_LINKMODE,
+    QEMU_IFLA_LINKINFO,
+    QEMU_IFLA_NET_NS_PID,
+    QEMU_IFLA_IFALIAS,
+    QEMU_IFLA_NUM_VF,
+    QEMU_IFLA_VFINFO_LIST,
+    QEMU_IFLA_STATS64,
+    QEMU_IFLA_VF_PORTS,
+    QEMU_IFLA_PORT_SELF,
+    QEMU_IFLA_AF_SPEC,
+    QEMU_IFLA_GROUP,
+    QEMU_IFLA_NET_NS_FD,
+    QEMU_IFLA_EXT_MASK,
+    QEMU_IFLA_PROMISCUITY,
+    QEMU_IFLA_NUM_TX_QUEUES,
+    QEMU_IFLA_NUM_RX_QUEUES,
+    QEMU_IFLA_CARRIER,
+    QEMU_IFLA_PHYS_PORT_ID,
+    QEMU_IFLA_CARRIER_CHANGES,
+    QEMU_IFLA_PHYS_SWITCH_ID,
+    QEMU_IFLA_LINK_NETNSID,
+    QEMU_IFLA_PHYS_PORT_NAME,
+    QEMU_IFLA_PROTO_DOWN,
+    QEMU_IFLA_GSO_MAX_SEGS,
+    QEMU_IFLA_GSO_MAX_SIZE,
+    QEMU_IFLA_PAD,
+    QEMU_IFLA_XDP,
+    QEMU_IFLA_EVENT,
+    QEMU_IFLA_NEW_NETNSID,
+    QEMU_IFLA_IF_NETNSID,
+    QEMU_IFLA_CARRIER_UP_COUNT,
+    QEMU_IFLA_CARRIER_DOWN_COUNT,
+    QEMU_IFLA_NEW_IFINDEX,
+    QEMU___IFLA_MAX
+};
+
+enum {
+    QEMU_IFLA_BRPORT_UNSPEC,
+    QEMU_IFLA_BRPORT_STATE,
+    QEMU_IFLA_BRPORT_PRIORITY,
+    QEMU_IFLA_BRPORT_COST,
+    QEMU_IFLA_BRPORT_MODE,
+    QEMU_IFLA_BRPORT_GUARD,
+    QEMU_IFLA_BRPORT_PROTECT,
+    QEMU_IFLA_BRPORT_FAST_LEAVE,
+    QEMU_IFLA_BRPORT_LEARNING,
+    QEMU_IFLA_BRPORT_UNICAST_FLOOD,
+    QEMU_IFLA_BRPORT_PROXYARP,
+    QEMU_IFLA_BRPORT_LEARNING_SYNC,
+    QEMU_IFLA_BRPORT_PROXYARP_WIFI,
+    QEMU_IFLA_BRPORT_ROOT_ID,
+    QEMU_IFLA_BRPORT_BRIDGE_ID,
+    QEMU_IFLA_BRPORT_DESIGNATED_PORT,
+    QEMU_IFLA_BRPORT_DESIGNATED_COST,
+    QEMU_IFLA_BRPORT_ID,
+    QEMU_IFLA_BRPORT_NO,
+    QEMU_IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
+    QEMU_IFLA_BRPORT_CONFIG_PENDING,
+    QEMU_IFLA_BRPORT_MESSAGE_AGE_TIMER,
+    QEMU_IFLA_BRPORT_FORWARD_DELAY_TIMER,
+    QEMU_IFLA_BRPORT_HOLD_TIMER,
+    QEMU_IFLA_BRPORT_FLUSH,
+    QEMU_IFLA_BRPORT_MULTICAST_ROUTER,
+    QEMU_IFLA_BRPORT_PAD,
+    QEMU_IFLA_BRPORT_MCAST_FLOOD,
+    QEMU_IFLA_BRPORT_MCAST_TO_UCAST,
+    QEMU_IFLA_BRPORT_VLAN_TUNNEL,
+    QEMU_IFLA_BRPORT_BCAST_FLOOD,
+    QEMU_IFLA_BRPORT_GROUP_FWD_MASK,
+    QEMU_IFLA_BRPORT_NEIGH_SUPPRESS,
+    QEMU___IFLA_BRPORT_MAX
+};
+
+enum {
+    QEMU_IFLA_TUN_UNSPEC,
+    QEMU_IFLA_TUN_OWNER,
+    QEMU_IFLA_TUN_GROUP,
+    QEMU_IFLA_TUN_TYPE,
+    QEMU_IFLA_TUN_PI,
+    QEMU_IFLA_TUN_VNET_HDR,
+    QEMU_IFLA_TUN_PERSIST,
+    QEMU_IFLA_TUN_MULTI_QUEUE,
+    QEMU_IFLA_TUN_NUM_QUEUES,
+    QEMU_IFLA_TUN_NUM_DISABLED_QUEUES,
+    QEMU___IFLA_TUN_MAX,
+};
+
+enum {
+    QEMU_IFLA_INFO_UNSPEC,
+    QEMU_IFLA_INFO_KIND,
+    QEMU_IFLA_INFO_DATA,
+    QEMU_IFLA_INFO_XSTATS,
+    QEMU_IFLA_INFO_SLAVE_KIND,
+    QEMU_IFLA_INFO_SLAVE_DATA,
+    QEMU___IFLA_INFO_MAX,
+};
+
+enum {
+    QEMU_IFLA_INET_UNSPEC,
+    QEMU_IFLA_INET_CONF,
+    QEMU___IFLA_INET_MAX,
+};
+
+enum {
+    QEMU_IFLA_INET6_UNSPEC,
+    QEMU_IFLA_INET6_FLAGS,
+    QEMU_IFLA_INET6_CONF,
+    QEMU_IFLA_INET6_STATS,
+    QEMU_IFLA_INET6_MCAST,
+    QEMU_IFLA_INET6_CACHEINFO,
+    QEMU_IFLA_INET6_ICMP6STATS,
+    QEMU_IFLA_INET6_TOKEN,
+    QEMU_IFLA_INET6_ADDR_GEN_MODE,
+    QEMU___IFLA_INET6_MAX
+};
+
+enum {
+    QEMU_IFLA_XDP_UNSPEC,
+    QEMU_IFLA_XDP_FD,
+    QEMU_IFLA_XDP_ATTACHED,
+    QEMU_IFLA_XDP_FLAGS,
+    QEMU_IFLA_XDP_PROG_ID,
+    QEMU___IFLA_XDP_MAX,
+};
+
+enum {
+    QEMU_RTA_UNSPEC,
+    QEMU_RTA_DST,
+    QEMU_RTA_SRC,
+    QEMU_RTA_IIF,
+    QEMU_RTA_OIF,
+    QEMU_RTA_GATEWAY,
+    QEMU_RTA_PRIORITY,
+    QEMU_RTA_PREFSRC,
+    QEMU_RTA_METRICS,
+    QEMU_RTA_MULTIPATH,
+    QEMU_RTA_PROTOINFO, /* no longer used */
+    QEMU_RTA_FLOW,
+    QEMU_RTA_CACHEINFO,
+    QEMU_RTA_SESSION, /* no longer used */
+    QEMU_RTA_MP_ALGO, /* no longer used */
+    QEMU_RTA_TABLE,
+    QEMU_RTA_MARK,
+    QEMU_RTA_MFC_STATS,
+    QEMU_RTA_VIA,
+    QEMU_RTA_NEWDST,
+    QEMU_RTA_PREF,
+    QEMU_RTA_ENCAP_TYPE,
+    QEMU_RTA_ENCAP,
+    QEMU_RTA_EXPIRES,
+    QEMU_RTA_PAD,
+    QEMU_RTA_UID,
+    QEMU_RTA_TTL_PROPAGATE,
+    QEMU_RTA_IP_PROTO,
+    QEMU_RTA_SPORT,
+    QEMU_RTA_DPORT,
+    QEMU___RTA_MAX
+};
+
+TargetFdTrans **target_fd_trans;
+unsigned int target_fd_max;
+
+static void tswap_nlmsghdr(struct nlmsghdr *nlh)
+{
+    nlh->nlmsg_len = tswap32(nlh->nlmsg_len);
+    nlh->nlmsg_type = tswap16(nlh->nlmsg_type);
+    nlh->nlmsg_flags = tswap16(nlh->nlmsg_flags);
+    nlh->nlmsg_seq = tswap32(nlh->nlmsg_seq);
+    nlh->nlmsg_pid = tswap32(nlh->nlmsg_pid);
+}
+
+static abi_long host_to_target_for_each_nlmsg(struct nlmsghdr *nlh,
+                                              size_t len,
+                                              abi_long (*host_to_target_nlmsg)
+                                                       (struct nlmsghdr *))
+{
+    uint32_t nlmsg_len;
+    abi_long ret;
+
+    while (len > sizeof(struct nlmsghdr)) {
+
+        nlmsg_len = nlh->nlmsg_len;
+        if (nlmsg_len < sizeof(struct nlmsghdr) ||
+            nlmsg_len > len) {
+            break;
+        }
+
+        switch (nlh->nlmsg_type) {
+        case NLMSG_DONE:
+            tswap_nlmsghdr(nlh);
+            return 0;
+        case NLMSG_NOOP:
+            break;
+        case NLMSG_ERROR:
+        {
+            struct nlmsgerr *e = NLMSG_DATA(nlh);
+            e->error = tswap32(e->error);
+            tswap_nlmsghdr(&e->msg);
+            tswap_nlmsghdr(nlh);
+            return 0;
+        }
+        default:
+            ret = host_to_target_nlmsg(nlh);
+            if (ret < 0) {
+                tswap_nlmsghdr(nlh);
+                return ret;
+            }
+            break;
+        }
+        tswap_nlmsghdr(nlh);
+        len -= NLMSG_ALIGN(nlmsg_len);
+        nlh = (struct nlmsghdr *)(((char*)nlh) + NLMSG_ALIGN(nlmsg_len));
+    }
+    return 0;
+}
+
+static abi_long target_to_host_for_each_nlmsg(struct nlmsghdr *nlh,
+                                              size_t len,
+                                              abi_long (*target_to_host_nlmsg)
+                                                       (struct nlmsghdr *))
+{
+    int ret;
+
+    while (len > sizeof(struct nlmsghdr)) {
+        if (tswap32(nlh->nlmsg_len) < sizeof(struct nlmsghdr) ||
+            tswap32(nlh->nlmsg_len) > len) {
+            break;
+        }
+        tswap_nlmsghdr(nlh);
+        switch (nlh->nlmsg_type) {
+        case NLMSG_DONE:
+            return 0;
+        case NLMSG_NOOP:
+            break;
+        case NLMSG_ERROR:
+        {
+            struct nlmsgerr *e = NLMSG_DATA(nlh);
+            e->error = tswap32(e->error);
+            tswap_nlmsghdr(&e->msg);
+            return 0;
+        }
+        default:
+            ret = target_to_host_nlmsg(nlh);
+            if (ret < 0) {
+                return ret;
+            }
+        }
+        len -= NLMSG_ALIGN(nlh->nlmsg_len);
+        nlh = (struct nlmsghdr *)(((char *)nlh) + NLMSG_ALIGN(nlh->nlmsg_len));
+    }
+    return 0;
+}
+
+#ifdef CONFIG_RTNETLINK
+static abi_long host_to_target_for_each_nlattr(struct nlattr *nlattr,
+                                               size_t len, void *context,
+                                               abi_long (*host_to_target_nlattr)
+                                                        (struct nlattr *,
+                                                         void *context))
+{
+    unsigned short nla_len;
+    abi_long ret;
+
+    while (len > sizeof(struct nlattr)) {
+        nla_len = nlattr->nla_len;
+        if (nla_len < sizeof(struct nlattr) ||
+            nla_len > len) {
+            break;
+        }
+        ret = host_to_target_nlattr(nlattr, context);
+        nlattr->nla_len = tswap16(nlattr->nla_len);
+        nlattr->nla_type = tswap16(nlattr->nla_type);
+        if (ret < 0) {
+            return ret;
+        }
+        len -= NLA_ALIGN(nla_len);
+        nlattr = (struct nlattr *)(((char *)nlattr) + NLA_ALIGN(nla_len));
+    }
+    return 0;
+}
+
+static abi_long host_to_target_for_each_rtattr(struct rtattr *rtattr,
+                                               size_t len,
+                                               abi_long (*host_to_target_rtattr)
+                                                        (struct rtattr *))
+{
+    unsigned short rta_len;
+    abi_long ret;
+
+    while (len > sizeof(struct rtattr)) {
+        rta_len = rtattr->rta_len;
+        if (rta_len < sizeof(struct rtattr) ||
+            rta_len > len) {
+            break;
+        }
+        ret = host_to_target_rtattr(rtattr);
+        rtattr->rta_len = tswap16(rtattr->rta_len);
+        rtattr->rta_type = tswap16(rtattr->rta_type);
+        if (ret < 0) {
+            return ret;
+        }
+        len -= RTA_ALIGN(rta_len);
+        rtattr = (struct rtattr *)(((char *)rtattr) + RTA_ALIGN(rta_len));
+    }
+    return 0;
+}
+
+#define NLA_DATA(nla) ((void *)((char *)(nla)) + NLA_HDRLEN)
+
+static abi_long host_to_target_data_bridge_nlattr(struct nlattr *nlattr,
+                                                  void *context)
+{
+    uint16_t *u16;
+    uint32_t *u32;
+    uint64_t *u64;
+
+    switch (nlattr->nla_type) {
+    /* no data */
+    case QEMU_IFLA_BR_FDB_FLUSH:
+        break;
+    /* binary */
+    case QEMU_IFLA_BR_GROUP_ADDR:
+        break;
+    /* uint8_t */
+    case QEMU_IFLA_BR_VLAN_FILTERING:
+    case QEMU_IFLA_BR_TOPOLOGY_CHANGE:
+    case QEMU_IFLA_BR_TOPOLOGY_CHANGE_DETECTED:
+    case QEMU_IFLA_BR_MCAST_ROUTER:
+    case QEMU_IFLA_BR_MCAST_SNOOPING:
+    case QEMU_IFLA_BR_MCAST_QUERY_USE_IFADDR:
+    case QEMU_IFLA_BR_MCAST_QUERIER:
+    case QEMU_IFLA_BR_NF_CALL_IPTABLES:
+    case QEMU_IFLA_BR_NF_CALL_IP6TABLES:
+    case QEMU_IFLA_BR_NF_CALL_ARPTABLES:
+    case QEMU_IFLA_BR_VLAN_STATS_ENABLED:
+    case QEMU_IFLA_BR_MCAST_STATS_ENABLED:
+    case QEMU_IFLA_BR_MCAST_IGMP_VERSION:
+    case QEMU_IFLA_BR_MCAST_MLD_VERSION:
+        break;
+    /* uint16_t */
+    case QEMU_IFLA_BR_PRIORITY:
+    case QEMU_IFLA_BR_VLAN_PROTOCOL:
+    case QEMU_IFLA_BR_GROUP_FWD_MASK:
+    case QEMU_IFLA_BR_ROOT_PORT:
+    case QEMU_IFLA_BR_VLAN_DEFAULT_PVID:
+        u16 = NLA_DATA(nlattr);
+        *u16 = tswap16(*u16);
+        break;
+    /* uint32_t */
+    case QEMU_IFLA_BR_FORWARD_DELAY:
+    case QEMU_IFLA_BR_HELLO_TIME:
+    case QEMU_IFLA_BR_MAX_AGE:
+    case QEMU_IFLA_BR_AGEING_TIME:
+    case QEMU_IFLA_BR_STP_STATE:
+    case QEMU_IFLA_BR_ROOT_PATH_COST:
+    case QEMU_IFLA_BR_MCAST_HASH_ELASTICITY:
+    case QEMU_IFLA_BR_MCAST_HASH_MAX:
+    case QEMU_IFLA_BR_MCAST_LAST_MEMBER_CNT:
+    case QEMU_IFLA_BR_MCAST_STARTUP_QUERY_CNT:
+        u32 = NLA_DATA(nlattr);
+        *u32 = tswap32(*u32);
+        break;
+    /* uint64_t */
+    case QEMU_IFLA_BR_HELLO_TIMER:
+    case QEMU_IFLA_BR_TCN_TIMER:
+    case QEMU_IFLA_BR_GC_TIMER:
+    case QEMU_IFLA_BR_TOPOLOGY_CHANGE_TIMER:
+    case QEMU_IFLA_BR_MCAST_LAST_MEMBER_INTVL:
+    case QEMU_IFLA_BR_MCAST_MEMBERSHIP_INTVL:
+    case QEMU_IFLA_BR_MCAST_QUERIER_INTVL:
+    case QEMU_IFLA_BR_MCAST_QUERY_INTVL:
+    case QEMU_IFLA_BR_MCAST_QUERY_RESPONSE_INTVL:
+    case QEMU_IFLA_BR_MCAST_STARTUP_QUERY_INTVL:
+        u64 = NLA_DATA(nlattr);
+        *u64 = tswap64(*u64);
+        break;
+    /* ifla_bridge_id: uin8_t[] */
+    case QEMU_IFLA_BR_ROOT_ID:
+    case QEMU_IFLA_BR_BRIDGE_ID:
+        break;
+    default:
+        gemu_log("Unknown QEMU_IFLA_BR type %d\n", nlattr->nla_type);
+        break;
+    }
+    return 0;
+}
+
+static abi_long host_to_target_slave_data_bridge_nlattr(struct nlattr *nlattr,
+                                                        void *context)
+{
+    uint16_t *u16;
+    uint32_t *u32;
+    uint64_t *u64;
+
+    switch (nlattr->nla_type) {
+    /* uint8_t */
+    case QEMU_IFLA_BRPORT_STATE:
+    case QEMU_IFLA_BRPORT_MODE:
+    case QEMU_IFLA_BRPORT_GUARD:
+    case QEMU_IFLA_BRPORT_PROTECT:
+    case QEMU_IFLA_BRPORT_FAST_LEAVE:
+    case QEMU_IFLA_BRPORT_LEARNING:
+    case QEMU_IFLA_BRPORT_UNICAST_FLOOD:
+    case QEMU_IFLA_BRPORT_PROXYARP:
+    case QEMU_IFLA_BRPORT_LEARNING_SYNC:
+    case QEMU_IFLA_BRPORT_PROXYARP_WIFI:
+    case QEMU_IFLA_BRPORT_TOPOLOGY_CHANGE_ACK:
+    case QEMU_IFLA_BRPORT_CONFIG_PENDING:
+    case QEMU_IFLA_BRPORT_MULTICAST_ROUTER:
+    case QEMU_IFLA_BRPORT_MCAST_FLOOD:
+    case QEMU_IFLA_BRPORT_MCAST_TO_UCAST:
+    case QEMU_IFLA_BRPORT_VLAN_TUNNEL:
+    case QEMU_IFLA_BRPORT_BCAST_FLOOD:
+    case QEMU_IFLA_BRPORT_NEIGH_SUPPRESS:
+        break;
+    /* uint16_t */
+    case QEMU_IFLA_BRPORT_PRIORITY:
+    case QEMU_IFLA_BRPORT_DESIGNATED_PORT:
+    case QEMU_IFLA_BRPORT_DESIGNATED_COST:
+    case QEMU_IFLA_BRPORT_ID:
+    case QEMU_IFLA_BRPORT_NO:
+    case QEMU_IFLA_BRPORT_GROUP_FWD_MASK:
+        u16 = NLA_DATA(nlattr);
+        *u16 = tswap16(*u16);
+        break;
+    /* uin32_t */
+    case QEMU_IFLA_BRPORT_COST:
+        u32 = NLA_DATA(nlattr);
+        *u32 = tswap32(*u32);
+        break;
+    /* uint64_t */
+    case QEMU_IFLA_BRPORT_MESSAGE_AGE_TIMER:
+    case QEMU_IFLA_BRPORT_FORWARD_DELAY_TIMER:
+    case QEMU_IFLA_BRPORT_HOLD_TIMER:
+        u64 = NLA_DATA(nlattr);
+        *u64 = tswap64(*u64);
+        break;
+    /* ifla_bridge_id: uint8_t[] */
+    case QEMU_IFLA_BRPORT_ROOT_ID:
+    case QEMU_IFLA_BRPORT_BRIDGE_ID:
+        break;
+    default:
+        gemu_log("Unknown QEMU_IFLA_BRPORT type %d\n", nlattr->nla_type);
+        break;
+    }
+    return 0;
+}
+
+static abi_long host_to_target_data_tun_nlattr(struct nlattr *nlattr,
+                                                  void *context)
+{
+    uint32_t *u32;
+
+    switch (nlattr->nla_type) {
+    /* uint8_t */
+    case QEMU_IFLA_TUN_TYPE:
+    case QEMU_IFLA_TUN_PI:
+    case QEMU_IFLA_TUN_VNET_HDR:
+    case QEMU_IFLA_TUN_PERSIST:
+    case QEMU_IFLA_TUN_MULTI_QUEUE:
+        break;
+    /* uint32_t */
+    case QEMU_IFLA_TUN_NUM_QUEUES:
+    case QEMU_IFLA_TUN_NUM_DISABLED_QUEUES:
+    case QEMU_IFLA_TUN_OWNER:
+    case QEMU_IFLA_TUN_GROUP:
+        u32 = NLA_DATA(nlattr);
+        *u32 = tswap32(*u32);
+        break;
+    default:
+        gemu_log("Unknown QEMU_IFLA_TUN type %d\n", nlattr->nla_type);
+        break;
+    }
+    return 0;
+}
+
+struct linkinfo_context {
+    int len;
+    char *name;
+    int slave_len;
+    char *slave_name;
+};
+
+static abi_long host_to_target_data_linkinfo_nlattr(struct nlattr *nlattr,
+                                                    void *context)
+{
+    struct linkinfo_context *li_context = context;
+
+    switch (nlattr->nla_type) {
+    /* string */
+    case QEMU_IFLA_INFO_KIND:
+        li_context->name = NLA_DATA(nlattr);
+        li_context->len = nlattr->nla_len - NLA_HDRLEN;
+        break;
+    case QEMU_IFLA_INFO_SLAVE_KIND:
+        li_context->slave_name = NLA_DATA(nlattr);
+        li_context->slave_len = nlattr->nla_len - NLA_HDRLEN;
+        break;
+    /* stats */
+    case QEMU_IFLA_INFO_XSTATS:
+        /* FIXME: only used by CAN */
+        break;
+    /* nested */
+    case QEMU_IFLA_INFO_DATA:
+        if (strncmp(li_context->name, "bridge",
+                    li_context->len) == 0) {
+            return host_to_target_for_each_nlattr(NLA_DATA(nlattr),
+                                                  nlattr->nla_len,
+                                                  NULL,
+                                             host_to_target_data_bridge_nlattr);
+        } else if (strncmp(li_context->name, "tun",
+                    li_context->len) == 0) {
+            return host_to_target_for_each_nlattr(NLA_DATA(nlattr),
+                                                  nlattr->nla_len,
+                                                  NULL,
+                                                host_to_target_data_tun_nlattr);
+        } else {
+            gemu_log("Unknown QEMU_IFLA_INFO_KIND %s\n", li_context->name);
+        }
+        break;
+    case QEMU_IFLA_INFO_SLAVE_DATA:
+        if (strncmp(li_context->slave_name, "bridge",
+                    li_context->slave_len) == 0) {
+            return host_to_target_for_each_nlattr(NLA_DATA(nlattr),
+                                                  nlattr->nla_len,
+                                                  NULL,
+                                       host_to_target_slave_data_bridge_nlattr);
+        } else {
+            gemu_log("Unknown QEMU_IFLA_INFO_SLAVE_KIND %s\n",
+                     li_context->slave_name);
+        }
+        break;
+    default:
+        gemu_log("Unknown host QEMU_IFLA_INFO type: %d\n", nlattr->nla_type);
+        break;
+    }
+
+    return 0;
+}
+
+static abi_long host_to_target_data_inet_nlattr(struct nlattr *nlattr,
+                                                void *context)
+{
+    uint32_t *u32;
+    int i;
+
+    switch (nlattr->nla_type) {
+    case QEMU_IFLA_INET_CONF:
+        u32 = NLA_DATA(nlattr);
+        for (i = 0; i < (nlattr->nla_len - NLA_HDRLEN) / sizeof(*u32);
+             i++) {
+            u32[i] = tswap32(u32[i]);
+        }
+        break;
+    default:
+        gemu_log("Unknown host AF_INET type: %d\n", nlattr->nla_type);
+    }
+    return 0;
+}
+
+static abi_long host_to_target_data_inet6_nlattr(struct nlattr *nlattr,
+                                                void *context)
+{
+    uint32_t *u32;
+    uint64_t *u64;
+    struct ifla_cacheinfo *ci;
+    int i;
+
+    switch (nlattr->nla_type) {
+    /* binaries */
+    case QEMU_IFLA_INET6_TOKEN:
+        break;
+    /* uint8_t */
+    case QEMU_IFLA_INET6_ADDR_GEN_MODE:
+        break;
+    /* uint32_t */
+    case QEMU_IFLA_INET6_FLAGS:
+        u32 = NLA_DATA(nlattr);
+        *u32 = tswap32(*u32);
+        break;
+    /* uint32_t[] */
+    case QEMU_IFLA_INET6_CONF:
+        u32 = NLA_DATA(nlattr);
+        for (i = 0; i < (nlattr->nla_len - NLA_HDRLEN) / sizeof(*u32);
+             i++) {
+            u32[i] = tswap32(u32[i]);
+        }
+        break;
+    /* ifla_cacheinfo */
+    case QEMU_IFLA_INET6_CACHEINFO:
+        ci = NLA_DATA(nlattr);
+        ci->max_reasm_len = tswap32(ci->max_reasm_len);
+        ci->tstamp = tswap32(ci->tstamp);
+        ci->reachable_time = tswap32(ci->reachable_time);
+        ci->retrans_time = tswap32(ci->retrans_time);
+        break;
+    /* uint64_t[] */
+    case QEMU_IFLA_INET6_STATS:
+    case QEMU_IFLA_INET6_ICMP6STATS:
+        u64 = NLA_DATA(nlattr);
+        for (i = 0; i < (nlattr->nla_len - NLA_HDRLEN) / sizeof(*u64);
+             i++) {
+            u64[i] = tswap64(u64[i]);
+        }
+        break;
+    default:
+        gemu_log("Unknown host AF_INET6 type: %d\n", nlattr->nla_type);
+    }
+    return 0;
+}
+
+static abi_long host_to_target_data_spec_nlattr(struct nlattr *nlattr,
+                                                    void *context)
+{
+    switch (nlattr->nla_type) {
+    case AF_INET:
+        return host_to_target_for_each_nlattr(NLA_DATA(nlattr), nlattr->nla_len,
+                                              NULL,
+                                             host_to_target_data_inet_nlattr);
+    case AF_INET6:
+        return host_to_target_for_each_nlattr(NLA_DATA(nlattr), nlattr->nla_len,
+                                              NULL,
+                                             host_to_target_data_inet6_nlattr);
+    default:
+        gemu_log("Unknown host AF_SPEC type: %d\n", nlattr->nla_type);
+        break;
+    }
+    return 0;
+}
+
+static abi_long host_to_target_data_xdp_nlattr(struct nlattr *nlattr,
+                                               void *context)
+{
+    uint32_t *u32;
+
+    switch (nlattr->nla_type) {
+    /* uint8_t */
+    case QEMU_IFLA_XDP_ATTACHED:
+        break;
+    /* uint32_t */
+    case QEMU_IFLA_XDP_PROG_ID:
+        u32 = NLA_DATA(nlattr);
+        *u32 = tswap32(*u32);
+        break;
+    default:
+        gemu_log("Unknown host XDP type: %d\n", nlattr->nla_type);
+        break;
+    }
+    return 0;
+}
+
+static abi_long host_to_target_data_link_rtattr(struct rtattr *rtattr)
+{
+    uint32_t *u32;
+    struct rtnl_link_stats *st;
+    struct rtnl_link_stats64 *st64;
+    struct rtnl_link_ifmap *map;
+    struct linkinfo_context li_context;
+
+    switch (rtattr->rta_type) {
+    /* binary stream */
+    case QEMU_IFLA_ADDRESS:
+    case QEMU_IFLA_BROADCAST:
+    /* string */
+    case QEMU_IFLA_IFNAME:
+    case QEMU_IFLA_QDISC:
+        break;
+    /* uin8_t */
+    case QEMU_IFLA_OPERSTATE:
+    case QEMU_IFLA_LINKMODE:
+    case QEMU_IFLA_CARRIER:
+    case QEMU_IFLA_PROTO_DOWN:
+        break;
+    /* uint32_t */
+    case QEMU_IFLA_MTU:
+    case QEMU_IFLA_LINK:
+    case QEMU_IFLA_WEIGHT:
+    case QEMU_IFLA_TXQLEN:
+    case QEMU_IFLA_CARRIER_CHANGES:
+    case QEMU_IFLA_NUM_RX_QUEUES:
+    case QEMU_IFLA_NUM_TX_QUEUES:
+    case QEMU_IFLA_PROMISCUITY:
+    case QEMU_IFLA_EXT_MASK:
+    case QEMU_IFLA_LINK_NETNSID:
+    case QEMU_IFLA_GROUP:
+    case QEMU_IFLA_MASTER:
+    case QEMU_IFLA_NUM_VF:
+    case QEMU_IFLA_GSO_MAX_SEGS:
+    case QEMU_IFLA_GSO_MAX_SIZE:
+    case QEMU_IFLA_CARRIER_UP_COUNT:
+    case QEMU_IFLA_CARRIER_DOWN_COUNT:
+        u32 = RTA_DATA(rtattr);
+        *u32 = tswap32(*u32);
+        break;
+    /* struct rtnl_link_stats */
+    case QEMU_IFLA_STATS:
+        st = RTA_DATA(rtattr);
+        st->rx_packets = tswap32(st->rx_packets);
+        st->tx_packets = tswap32(st->tx_packets);
+        st->rx_bytes = tswap32(st->rx_bytes);
+        st->tx_bytes = tswap32(st->tx_bytes);
+        st->rx_errors = tswap32(st->rx_errors);
+        st->tx_errors = tswap32(st->tx_errors);
+        st->rx_dropped = tswap32(st->rx_dropped);
+        st->tx_dropped = tswap32(st->tx_dropped);
+        st->multicast = tswap32(st->multicast);
+        st->collisions = tswap32(st->collisions);
+
+        /* detailed rx_errors: */
+        st->rx_length_errors = tswap32(st->rx_length_errors);
+        st->rx_over_errors = tswap32(st->rx_over_errors);
+        st->rx_crc_errors = tswap32(st->rx_crc_errors);
+        st->rx_frame_errors = tswap32(st->rx_frame_errors);
+        st->rx_fifo_errors = tswap32(st->rx_fifo_errors);
+        st->rx_missed_errors = tswap32(st->rx_missed_errors);
+
+        /* detailed tx_errors */
+        st->tx_aborted_errors = tswap32(st->tx_aborted_errors);
+        st->tx_carrier_errors = tswap32(st->tx_carrier_errors);
+        st->tx_fifo_errors = tswap32(st->tx_fifo_errors);
+        st->tx_heartbeat_errors = tswap32(st->tx_heartbeat_errors);
+        st->tx_window_errors = tswap32(st->tx_window_errors);
+
+        /* for cslip etc */
+        st->rx_compressed = tswap32(st->rx_compressed);
+        st->tx_compressed = tswap32(st->tx_compressed);
+        break;
+    /* struct rtnl_link_stats64 */
+    case QEMU_IFLA_STATS64:
+        st64 = RTA_DATA(rtattr);
+        st64->rx_packets = tswap64(st64->rx_packets);
+        st64->tx_packets = tswap64(st64->tx_packets);
+        st64->rx_bytes = tswap64(st64->rx_bytes);
+        st64->tx_bytes = tswap64(st64->tx_bytes);
+        st64->rx_errors = tswap64(st64->rx_errors);
+        st64->tx_errors = tswap64(st64->tx_errors);
+        st64->rx_dropped = tswap64(st64->rx_dropped);
+        st64->tx_dropped = tswap64(st64->tx_dropped);
+        st64->multicast = tswap64(st64->multicast);
+        st64->collisions = tswap64(st64->collisions);
+
+        /* detailed rx_errors: */
+        st64->rx_length_errors = tswap64(st64->rx_length_errors);
+        st64->rx_over_errors = tswap64(st64->rx_over_errors);
+        st64->rx_crc_errors = tswap64(st64->rx_crc_errors);
+        st64->rx_frame_errors = tswap64(st64->rx_frame_errors);
+        st64->rx_fifo_errors = tswap64(st64->rx_fifo_errors);
+        st64->rx_missed_errors = tswap64(st64->rx_missed_errors);
+
+        /* detailed tx_errors */
+        st64->tx_aborted_errors = tswap64(st64->tx_aborted_errors);
+        st64->tx_carrier_errors = tswap64(st64->tx_carrier_errors);
+        st64->tx_fifo_errors = tswap64(st64->tx_fifo_errors);
+        st64->tx_heartbeat_errors = tswap64(st64->tx_heartbeat_errors);
+        st64->tx_window_errors = tswap64(st64->tx_window_errors);
+
+        /* for cslip etc */
+        st64->rx_compressed = tswap64(st64->rx_compressed);
+        st64->tx_compressed = tswap64(st64->tx_compressed);
+        break;
+    /* struct rtnl_link_ifmap */
+    case QEMU_IFLA_MAP:
+        map = RTA_DATA(rtattr);
+        map->mem_start = tswap64(map->mem_start);
+        map->mem_end = tswap64(map->mem_end);
+        map->base_addr = tswap64(map->base_addr);
+        map->irq = tswap16(map->irq);
+        break;
+    /* nested */
+    case QEMU_IFLA_LINKINFO:
+        memset(&li_context, 0, sizeof(li_context));
+        return host_to_target_for_each_nlattr(RTA_DATA(rtattr), rtattr->rta_len,
+                                              &li_context,
+                                           host_to_target_data_linkinfo_nlattr);
+    case QEMU_IFLA_AF_SPEC:
+        return host_to_target_for_each_nlattr(RTA_DATA(rtattr), rtattr->rta_len,
+                                              NULL,
+                                             host_to_target_data_spec_nlattr);
+    case QEMU_IFLA_XDP:
+        return host_to_target_for_each_nlattr(RTA_DATA(rtattr), rtattr->rta_len,
+                                              NULL,
+                                                host_to_target_data_xdp_nlattr);
+    default:
+        gemu_log("Unknown host QEMU_IFLA type: %d\n", rtattr->rta_type);
+        break;
+    }
+    return 0;
+}
+
+static abi_long host_to_target_data_addr_rtattr(struct rtattr *rtattr)
+{
+    uint32_t *u32;
+    struct ifa_cacheinfo *ci;
+
+    switch (rtattr->rta_type) {
+    /* binary: depends on family type */
+    case IFA_ADDRESS:
+    case IFA_LOCAL:
+        break;
+    /* string */
+    case IFA_LABEL:
+        break;
+    /* u32 */
+    case IFA_FLAGS:
+    case IFA_BROADCAST:
+        u32 = RTA_DATA(rtattr);
+        *u32 = tswap32(*u32);
+        break;
+    /* struct ifa_cacheinfo */
+    case IFA_CACHEINFO:
+        ci = RTA_DATA(rtattr);
+        ci->ifa_prefered = tswap32(ci->ifa_prefered);
+        ci->ifa_valid = tswap32(ci->ifa_valid);
+        ci->cstamp = tswap32(ci->cstamp);
+        ci->tstamp = tswap32(ci->tstamp);
+        break;
+    default:
+        gemu_log("Unknown host IFA type: %d\n", rtattr->rta_type);
+        break;
+    }
+    return 0;
+}
+
+static abi_long host_to_target_data_route_rtattr(struct rtattr *rtattr)
+{
+    uint32_t *u32;
+    struct rta_cacheinfo *ci;
+
+    switch (rtattr->rta_type) {
+    /* binary: depends on family type */
+    case QEMU_RTA_GATEWAY:
+    case QEMU_RTA_DST:
+    case QEMU_RTA_PREFSRC:
+        break;
+    /* u8 */
+    case QEMU_RTA_PREF:
+        break;
+    /* u32 */
+    case QEMU_RTA_PRIORITY:
+    case QEMU_RTA_TABLE:
+    case QEMU_RTA_OIF:
+        u32 = RTA_DATA(rtattr);
+        *u32 = tswap32(*u32);
+        break;
+    /* struct rta_cacheinfo */
+    case QEMU_RTA_CACHEINFO:
+        ci = RTA_DATA(rtattr);
+        ci->rta_clntref = tswap32(ci->rta_clntref);
+        ci->rta_lastuse = tswap32(ci->rta_lastuse);
+        ci->rta_expires = tswap32(ci->rta_expires);
+        ci->rta_error = tswap32(ci->rta_error);
+        ci->rta_used = tswap32(ci->rta_used);
+#if defined(RTNETLINK_HAVE_PEERINFO)
+        ci->rta_id = tswap32(ci->rta_id);
+        ci->rta_ts = tswap32(ci->rta_ts);
+        ci->rta_tsage = tswap32(ci->rta_tsage);
+#endif
+        break;
+    default:
+        gemu_log("Unknown host RTA type: %d\n", rtattr->rta_type);
+        break;
+    }
+    return 0;
+}
+
+static abi_long host_to_target_link_rtattr(struct rtattr *rtattr,
+                                         uint32_t rtattr_len)
+{
+    return host_to_target_for_each_rtattr(rtattr, rtattr_len,
+                                          host_to_target_data_link_rtattr);
+}
+
+static abi_long host_to_target_addr_rtattr(struct rtattr *rtattr,
+                                         uint32_t rtattr_len)
+{
+    return host_to_target_for_each_rtattr(rtattr, rtattr_len,
+                                          host_to_target_data_addr_rtattr);
+}
+
+static abi_long host_to_target_route_rtattr(struct rtattr *rtattr,
+                                         uint32_t rtattr_len)
+{
+    return host_to_target_for_each_rtattr(rtattr, rtattr_len,
+                                          host_to_target_data_route_rtattr);
+}
+
+static abi_long host_to_target_data_route(struct nlmsghdr *nlh)
+{
+    uint32_t nlmsg_len;
+    struct ifinfomsg *ifi;
+    struct ifaddrmsg *ifa;
+    struct rtmsg *rtm;
+
+    nlmsg_len = nlh->nlmsg_len;
+    switch (nlh->nlmsg_type) {
+    case RTM_NEWLINK:
+    case RTM_DELLINK:
+    case RTM_GETLINK:
+        if (nlh->nlmsg_len >= NLMSG_LENGTH(sizeof(*ifi))) {
+            ifi = NLMSG_DATA(nlh);
+            ifi->ifi_type = tswap16(ifi->ifi_type);
+            ifi->ifi_index = tswap32(ifi->ifi_index);
+            ifi->ifi_flags = tswap32(ifi->ifi_flags);
+            ifi->ifi_change = tswap32(ifi->ifi_change);
+            host_to_target_link_rtattr(IFLA_RTA(ifi),
+                                       nlmsg_len - NLMSG_LENGTH(sizeof(*ifi)));
+        }
+        break;
+    case RTM_NEWADDR:
+    case RTM_DELADDR:
+    case RTM_GETADDR:
+        if (nlh->nlmsg_len >= NLMSG_LENGTH(sizeof(*ifa))) {
+            ifa = NLMSG_DATA(nlh);
+            ifa->ifa_index = tswap32(ifa->ifa_index);
+            host_to_target_addr_rtattr(IFA_RTA(ifa),
+                                       nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
+        }
+        break;
+    case RTM_NEWROUTE:
+    case RTM_DELROUTE:
+    case RTM_GETROUTE:
+        if (nlh->nlmsg_len >= NLMSG_LENGTH(sizeof(*rtm))) {
+            rtm = NLMSG_DATA(nlh);
+            rtm->rtm_flags = tswap32(rtm->rtm_flags);
+            host_to_target_route_rtattr(RTM_RTA(rtm),
+                                        nlmsg_len - NLMSG_LENGTH(sizeof(*rtm)));
+        }
+        break;
+    default:
+        return -TARGET_EINVAL;
+    }
+    return 0;
+}
+
+static inline abi_long host_to_target_nlmsg_route(struct nlmsghdr *nlh,
+                                                  size_t len)
+{
+    return host_to_target_for_each_nlmsg(nlh, len, host_to_target_data_route);
+}
+
+static abi_long target_to_host_for_each_rtattr(struct rtattr *rtattr,
+                                               size_t len,
+                                               abi_long (*target_to_host_rtattr)
+                                                        (struct rtattr *))
+{
+    abi_long ret;
+
+    while (len >= sizeof(struct rtattr)) {
+        if (tswap16(rtattr->rta_len) < sizeof(struct rtattr) ||
+            tswap16(rtattr->rta_len) > len) {
+            break;
+        }
+        rtattr->rta_len = tswap16(rtattr->rta_len);
+        rtattr->rta_type = tswap16(rtattr->rta_type);
+        ret = target_to_host_rtattr(rtattr);
+        if (ret < 0) {
+            return ret;
+        }
+        len -= RTA_ALIGN(rtattr->rta_len);
+        rtattr = (struct rtattr *)(((char *)rtattr) +
+                 RTA_ALIGN(rtattr->rta_len));
+    }
+    return 0;
+}
+
+static abi_long target_to_host_data_link_rtattr(struct rtattr *rtattr)
+{
+    switch (rtattr->rta_type) {
+    default:
+        gemu_log("Unknown target QEMU_IFLA type: %d\n", rtattr->rta_type);
+        break;
+    }
+    return 0;
+}
+
+static abi_long target_to_host_data_addr_rtattr(struct rtattr *rtattr)
+{
+    switch (rtattr->rta_type) {
+    /* binary: depends on family type */
+    case IFA_LOCAL:
+    case IFA_ADDRESS:
+        break;
+    default:
+        gemu_log("Unknown target IFA type: %d\n", rtattr->rta_type);
+        break;
+    }
+    return 0;
+}
+
+static abi_long target_to_host_data_route_rtattr(struct rtattr *rtattr)
+{
+    uint32_t *u32;
+    switch (rtattr->rta_type) {
+    /* binary: depends on family type */
+    case QEMU_RTA_DST:
+    case QEMU_RTA_SRC:
+    case QEMU_RTA_GATEWAY:
+        break;
+    /* u32 */
+    case QEMU_RTA_PRIORITY:
+    case QEMU_RTA_OIF:
+        u32 = RTA_DATA(rtattr);
+        *u32 = tswap32(*u32);
+        break;
+    default:
+        gemu_log("Unknown target RTA type: %d\n", rtattr->rta_type);
+        break;
+    }
+    return 0;
+}
+
+static void target_to_host_link_rtattr(struct rtattr *rtattr,
+                                       uint32_t rtattr_len)
+{
+    target_to_host_for_each_rtattr(rtattr, rtattr_len,
+                                   target_to_host_data_link_rtattr);
+}
+
+static void target_to_host_addr_rtattr(struct rtattr *rtattr,
+                                     uint32_t rtattr_len)
+{
+    target_to_host_for_each_rtattr(rtattr, rtattr_len,
+                                   target_to_host_data_addr_rtattr);
+}
+
+static void target_to_host_route_rtattr(struct rtattr *rtattr,
+                                     uint32_t rtattr_len)
+{
+    target_to_host_for_each_rtattr(rtattr, rtattr_len,
+                                   target_to_host_data_route_rtattr);
+}
+
+static abi_long target_to_host_data_route(struct nlmsghdr *nlh)
+{
+    struct ifinfomsg *ifi;
+    struct ifaddrmsg *ifa;
+    struct rtmsg *rtm;
+
+    switch (nlh->nlmsg_type) {
+    case RTM_GETLINK:
+        break;
+    case RTM_NEWLINK:
+    case RTM_DELLINK:
+        if (nlh->nlmsg_len >= NLMSG_LENGTH(sizeof(*ifi))) {
+            ifi = NLMSG_DATA(nlh);
+            ifi->ifi_type = tswap16(ifi->ifi_type);
+            ifi->ifi_index = tswap32(ifi->ifi_index);
+            ifi->ifi_flags = tswap32(ifi->ifi_flags);
+            ifi->ifi_change = tswap32(ifi->ifi_change);
+            target_to_host_link_rtattr(IFLA_RTA(ifi), nlh->nlmsg_len -
+                                       NLMSG_LENGTH(sizeof(*ifi)));
+        }
+        break;
+    case RTM_GETADDR:
+    case RTM_NEWADDR:
+    case RTM_DELADDR:
+        if (nlh->nlmsg_len >= NLMSG_LENGTH(sizeof(*ifa))) {
+            ifa = NLMSG_DATA(nlh);
+            ifa->ifa_index = tswap32(ifa->ifa_index);
+            target_to_host_addr_rtattr(IFA_RTA(ifa), nlh->nlmsg_len -
+                                       NLMSG_LENGTH(sizeof(*ifa)));
+        }
+        break;
+    case RTM_GETROUTE:
+        break;
+    case RTM_NEWROUTE:
+    case RTM_DELROUTE:
+        if (nlh->nlmsg_len >= NLMSG_LENGTH(sizeof(*rtm))) {
+            rtm = NLMSG_DATA(nlh);
+            rtm->rtm_flags = tswap32(rtm->rtm_flags);
+            target_to_host_route_rtattr(RTM_RTA(rtm), nlh->nlmsg_len -
+                                        NLMSG_LENGTH(sizeof(*rtm)));
+        }
+        break;
+    default:
+        return -TARGET_EOPNOTSUPP;
+    }
+    return 0;
+}
+
+static abi_long target_to_host_nlmsg_route(struct nlmsghdr *nlh, size_t len)
+{
+    return target_to_host_for_each_nlmsg(nlh, len, target_to_host_data_route);
+}
+#endif /* CONFIG_RTNETLINK */
+
+static abi_long host_to_target_data_audit(struct nlmsghdr *nlh)
+{
+    switch (nlh->nlmsg_type) {
+    default:
+        gemu_log("Unknown host audit message type %d\n",
+                 nlh->nlmsg_type);
+        return -TARGET_EINVAL;
+    }
+    return 0;
+}
+
+static inline abi_long host_to_target_nlmsg_audit(struct nlmsghdr *nlh,
+                                                  size_t len)
+{
+    return host_to_target_for_each_nlmsg(nlh, len, host_to_target_data_audit);
+}
+
+static abi_long target_to_host_data_audit(struct nlmsghdr *nlh)
+{
+    switch (nlh->nlmsg_type) {
+    case AUDIT_USER:
+    case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG:
+    case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2:
+        break;
+    default:
+        gemu_log("Unknown target audit message type %d\n",
+                 nlh->nlmsg_type);
+        return -TARGET_EINVAL;
+    }
+
+    return 0;
+}
+
+static abi_long target_to_host_nlmsg_audit(struct nlmsghdr *nlh, size_t len)
+{
+    return target_to_host_for_each_nlmsg(nlh, len, target_to_host_data_audit);
+}
+
+static abi_long packet_target_to_host_sockaddr(void *host_addr,
+                                               abi_ulong target_addr,
+                                               socklen_t len)
+{
+    struct sockaddr *addr = host_addr;
+    struct target_sockaddr *target_saddr;
+
+    target_saddr = lock_user(VERIFY_READ, target_addr, len, 1);
+    if (!target_saddr) {
+        return -TARGET_EFAULT;
+    }
+
+    memcpy(addr, target_saddr, len);
+    addr->sa_family = tswap16(target_saddr->sa_family);
+    /* spkt_protocol is big-endian */
+
+    unlock_user(target_saddr, target_addr, 0);
+    return 0;
+}
+
+TargetFdTrans target_packet_trans = {
+    .target_to_host_addr = packet_target_to_host_sockaddr,
+};
+
+#ifdef CONFIG_RTNETLINK
+static abi_long netlink_route_target_to_host(void *buf, size_t len)
+{
+    abi_long ret;
+
+    ret = target_to_host_nlmsg_route(buf, len);
+    if (ret < 0) {
+        return ret;
+    }
+
+    return len;
+}
+
+static abi_long netlink_route_host_to_target(void *buf, size_t len)
+{
+    abi_long ret;
+
+    ret = host_to_target_nlmsg_route(buf, len);
+    if (ret < 0) {
+        return ret;
+    }
+
+    return len;
+}
+
+TargetFdTrans target_netlink_route_trans = {
+    .target_to_host_data = netlink_route_target_to_host,
+    .host_to_target_data = netlink_route_host_to_target,
+};
+#endif /* CONFIG_RTNETLINK */
+
+static abi_long netlink_audit_target_to_host(void *buf, size_t len)
+{
+    abi_long ret;
+
+    ret = target_to_host_nlmsg_audit(buf, len);
+    if (ret < 0) {
+        return ret;
+    }
+
+    return len;
+}
+
+static abi_long netlink_audit_host_to_target(void *buf, size_t len)
+{
+    abi_long ret;
+
+    ret = host_to_target_nlmsg_audit(buf, len);
+    if (ret < 0) {
+        return ret;
+    }
+
+    return len;
+}
+
+TargetFdTrans target_netlink_audit_trans = {
+    .target_to_host_data = netlink_audit_target_to_host,
+    .host_to_target_data = netlink_audit_host_to_target,
+};
+
+/* signalfd siginfo conversion */
+
+static void
+host_to_target_signalfd_siginfo(struct signalfd_siginfo *tinfo,
+                                const struct signalfd_siginfo *info)
+{
+    int sig = host_to_target_signal(info->ssi_signo);
+
+    /* linux/signalfd.h defines a ssi_addr_lsb
+     * not defined in sys/signalfd.h but used by some kernels
+     */
+
+#ifdef BUS_MCEERR_AO
+    if (tinfo->ssi_signo == SIGBUS &&
+        (tinfo->ssi_code == BUS_MCEERR_AR ||
+         tinfo->ssi_code == BUS_MCEERR_AO)) {
+        uint16_t *ssi_addr_lsb = (uint16_t *)(&info->ssi_addr + 1);
+        uint16_t *tssi_addr_lsb = (uint16_t *)(&tinfo->ssi_addr + 1);
+        *tssi_addr_lsb = tswap16(*ssi_addr_lsb);
+    }
+#endif
+
+    tinfo->ssi_signo = tswap32(sig);
+    tinfo->ssi_errno = tswap32(tinfo->ssi_errno);
+    tinfo->ssi_code = tswap32(info->ssi_code);
+    tinfo->ssi_pid = tswap32(info->ssi_pid);
+    tinfo->ssi_uid = tswap32(info->ssi_uid);
+    tinfo->ssi_fd = tswap32(info->ssi_fd);
+    tinfo->ssi_tid = tswap32(info->ssi_tid);
+    tinfo->ssi_band = tswap32(info->ssi_band);
+    tinfo->ssi_overrun = tswap32(info->ssi_overrun);
+    tinfo->ssi_trapno = tswap32(info->ssi_trapno);
+    tinfo->ssi_status = tswap32(info->ssi_status);
+    tinfo->ssi_int = tswap32(info->ssi_int);
+    tinfo->ssi_ptr = tswap64(info->ssi_ptr);
+    tinfo->ssi_utime = tswap64(info->ssi_utime);
+    tinfo->ssi_stime = tswap64(info->ssi_stime);
+    tinfo->ssi_addr = tswap64(info->ssi_addr);
+}
+
+static abi_long host_to_target_data_signalfd(void *buf, size_t len)
+{
+    int i;
+
+    for (i = 0; i < len; i += sizeof(struct signalfd_siginfo)) {
+        host_to_target_signalfd_siginfo(buf + i, buf + i);
+    }
+
+    return len;
+}
+
+TargetFdTrans target_signalfd_trans = {
+    .host_to_target_data = host_to_target_data_signalfd,
+};
+
+static abi_long swap_data_eventfd(void *buf, size_t len)
+{
+    uint64_t *counter = buf;
+    int i;
+
+    if (len < sizeof(uint64_t)) {
+        return -EINVAL;
+    }
+
+    for (i = 0; i < len; i += sizeof(uint64_t)) {
+        *counter = tswap64(*counter);
+        counter++;
+    }
+
+    return len;
+}
+
+TargetFdTrans target_eventfd_trans = {
+    .host_to_target_data = swap_data_eventfd,
+    .target_to_host_data = swap_data_eventfd,
+};
+
+#if (defined(TARGET_NR_inotify_init) && defined(__NR_inotify_init)) || \
+    (defined(CONFIG_INOTIFY1) && defined(TARGET_NR_inotify_init1) && \
+     defined(__NR_inotify_init1))
+static abi_long host_to_target_data_inotify(void *buf, size_t len)
+{
+    struct inotify_event *ev;
+    int i;
+    uint32_t name_len;
+
+    for (i = 0; i < len; i += sizeof(struct inotify_event) + name_len) {
+        ev = (struct inotify_event *)((char *)buf + i);
+        name_len = ev->len;
+
+        ev->wd = tswap32(ev->wd);
+        ev->mask = tswap32(ev->mask);
+        ev->cookie = tswap32(ev->cookie);
+        ev->len = tswap32(name_len);
+    }
+
+    return len;
+}
+
+TargetFdTrans target_inotify_trans = {
+    .host_to_target_data = host_to_target_data_inotify,
+};
+#endif