@@ -103,6 +103,8 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
#include <linux/blkpg.h>
#include "linux_loop.h"
#include <linux/if_packet.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
#include "uname.h"
#include "qemu.h"
@@ -301,6 +303,14 @@ static TargetFdTrans **target_fd_trans;
static unsigned int target_fd_max;
+static TargetFdDataFunc fd_trans_target_to_host_data(int fd)
+{
+ if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
+ return target_fd_trans[fd]->target_to_host_data;
+ }
+ return NULL;
+}
+
static TargetFdDataFunc fd_trans_host_to_target_data(int fd)
{
if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
@@ -1205,7 +1215,13 @@ static inline abi_long target_to_host_sockaddr(int fd, struct sockaddr *addr,
memcpy(addr, target_saddr, len);
addr->sa_family = sa_family;
- if (sa_family == AF_PACKET) {
+ if (sa_family == AF_NETLINK) {
+ struct sockaddr_nl *nladdr;
+
+ nladdr = (struct sockaddr_nl *)addr;
+ nladdr->nl_pid = tswap32(nladdr->nl_pid);
+ nladdr->nl_groups = tswap32(nladdr->nl_groups);
+ } else if (sa_family == AF_PACKET) {
struct target_sockaddr_ll *lladdr;
lladdr = (struct target_sockaddr_ll *)addr;
@@ -1228,6 +1244,11 @@ static inline abi_long host_to_target_sockaddr(abi_ulong target_addr,
return -TARGET_EFAULT;
memcpy(target_saddr, addr, len);
target_saddr->sa_family = tswap16(addr->sa_family);
+ if (addr->sa_family == AF_NETLINK) {
+ struct sockaddr_nl *target_nl = (struct sockaddr_nl *)target_saddr;
+ target_nl->nl_pid = tswap32(target_nl->nl_pid);
+ target_nl->nl_groups = tswap32(target_nl->nl_groups);
+ }
unlock_user(target_saddr, target_addr, len);
return 0;
@@ -1459,6 +1480,511 @@ static inline abi_long host_to_target_cmsg(struct target_msghdr *target_msgh,
return 0;
}
+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);
+ }
+ 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;
+}
+
+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;
+}
+
+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;
+
+ switch (rtattr->rta_type) {
+ /* binary stream */
+ case IFLA_ADDRESS:
+ case IFLA_BROADCAST:
+ /* string */
+ case IFLA_IFNAME:
+ case IFLA_QDISC:
+ break;
+ /* uin8_t */
+ case IFLA_OPERSTATE:
+ case IFLA_LINKMODE:
+ case IFLA_CARRIER:
+ case IFLA_PROTO_DOWN:
+ break;
+ /* uint32_t */
+ case IFLA_MTU:
+ case IFLA_LINK:
+ case IFLA_WEIGHT:
+ case IFLA_TXQLEN:
+ case IFLA_CARRIER_CHANGES:
+ case IFLA_NUM_RX_QUEUES:
+ case IFLA_NUM_TX_QUEUES:
+ case IFLA_PROMISCUITY:
+ case IFLA_EXT_MASK:
+ case IFLA_LINK_NETNSID:
+ case IFLA_GROUP:
+ case IFLA_MASTER:
+ case IFLA_NUM_VF:
+ u32 = RTA_DATA(rtattr);
+ *u32 = tswap32(*u32);
+ break;
+ /* struct rtnl_link_stats */
+ case 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 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 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 IFLA_AF_SPEC:
+ case IFLA_LINKINFO:
+ /* FIXME: implement nested type */
+ gemu_log("Unimplemented nested type %d\n", rtattr->rta_type);
+ break;
+ default:
+ gemu_log("Unknown host 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;
+ switch (rtattr->rta_type) {
+ /* binary: depends on family type */
+ case RTA_GATEWAY:
+ case RTA_DST:
+ case RTA_PREFSRC:
+ break;
+ /* u32 */
+ case RTA_PRIORITY:
+ case RTA_TABLE:
+ case RTA_OIF:
+ u32 = RTA_DATA(rtattr);
+ *u32 = tswap32(*u32);
+ 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:
+ 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:
+ 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:
+ 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 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 RTA_DST:
+ case RTA_SRC:
+ case RTA_GATEWAY:
+ break;
+ /* u32 */
+ case 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:
+ 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:
+ 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:
+ 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);
+}
+
/* do_setsockopt() Must return target values and target errnos. */
static abi_long do_setsockopt(int sockfd, int level, int optname,
abi_ulong optval_addr, socklen_t optlen)
@@ -2126,6 +2652,21 @@ static TargetFdTrans target_packet_trans = {
.target_to_host_addr = packet_target_to_host_sockaddr,
};
+static abi_long netlink_route_target_to_host(void *buf, size_t len)
+{
+ return target_to_host_nlmsg_route(buf, len);
+}
+
+static abi_long netlink_route_host_to_target(void *buf, size_t len)
+{
+ return host_to_target_nlmsg_route(buf, len);
+}
+
+static TargetFdTrans target_netlink_route_trans = {
+ .target_to_host_data = netlink_route_target_to_host,
+ .host_to_target_data = netlink_route_host_to_target,
+};
+
/* do_socket() Must return target values and target errnos. */
static abi_long do_socket(int domain, int type, int protocol)
{
@@ -2137,8 +2678,10 @@ static abi_long do_socket(int domain, int type, int protocol)
return ret;
}
- if (domain == PF_NETLINK)
- return -TARGET_EAFNOSUPPORT;
+ if (domain == PF_NETLINK &&
+ protocol != NETLINK_ROUTE) {
+ return -EPFNOSUPPORT;
+ }
if (domain == AF_PACKET ||
(domain == AF_INET && type == SOCK_PACKET)) {
@@ -2153,6 +2696,14 @@ static abi_long do_socket(int domain, int type, int protocol)
* if socket type is SOCK_PACKET, bind by name
*/
fd_trans_register(ret, &target_packet_trans);
+ } else if (domain == PF_NETLINK) {
+ switch (protocol) {
+ case NETLINK_ROUTE:
+ fd_trans_register(ret, &target_netlink_route_trans);
+ break;
+ default:
+ g_assert_not_reached();
+ }
}
}
return ret;
@@ -2237,14 +2788,25 @@ static abi_long do_sendrecvmsg_locked(int fd, struct target_msghdr *msgp,
msg.msg_iov = vec;
if (send) {
- ret = target_to_host_cmsg(&msg, msgp);
- if (ret == 0)
+ if (fd_trans_target_to_host_data(fd)) {
+ ret = fd_trans_target_to_host_data(fd)(msg.msg_iov->iov_base,
+ msg.msg_iov->iov_len);
+ } else {
+ ret = target_to_host_cmsg(&msg, msgp);
+ }
+ if (ret == 0) {
ret = get_errno(sendmsg(fd, &msg, flags));
+ }
} else {
ret = get_errno(recvmsg(fd, &msg, flags));
if (!is_error(ret)) {
len = ret;
- ret = host_to_target_cmsg(msgp, &msg);
+ if (fd_trans_host_to_target_data(fd)) {
+ ret = fd_trans_host_to_target_data(fd)(msg.msg_iov->iov_base,
+ msg.msg_iov->iov_len);
+ } else {
+ ret = host_to_target_cmsg(msgp, &msg);
+ }
if (!is_error(ret)) {
msgp->msg_namelen = tswap32(msg.msg_namelen);
if (msg.msg_name != NULL) {
@@ -2471,6 +3033,13 @@ static abi_long do_sendto(int fd, abi_ulong msg, size_t len, int flags,
host_msg = lock_user(VERIFY_READ, msg, len, 1);
if (!host_msg)
return -TARGET_EFAULT;
+ if (fd_trans_target_to_host_data(fd)) {
+ ret = fd_trans_target_to_host_data(fd)(host_msg, len);
+ if (ret < 0) {
+ unlock_user(host_msg, msg, 0);
+ return ret;
+ }
+ }
if (target_addr) {
addr = alloca(addrlen+1);
ret = target_to_host_sockaddr(fd, addr, target_addr, addrlen);
rtnetlink is needed to use iproute package (ip addr, ip route) and dhcp client. Examples: Without this patch: # ip link Cannot open netlink socket: Address family not supported by protocol # ip addr Cannot open netlink socket: Address family not supported by protocol # ip route Cannot open netlink socket: Address family not supported by protocol # dhclient eth0 Cannot open netlink socket: Address family not supported by protocol Cannot open netlink socket: Address family not supported by protocol With this patch: # ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 51: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT qlen 1000 link/ether 00:16:3e:89:6b:d7 brd ff:ff:ff:ff:ff:ff # ip addr show eth0 51: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP qlen 1000 link/ether 00:16:3e:89:6b:d7 brd ff:ff:ff:ff:ff:ff inet 192.168.122.197/24 brd 192.168.122.255 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::216:3eff:fe89:6bd7/64 scope link valid_lft forever preferred_lft forever # ip route default via 192.168.122.1 dev eth0 192.168.122.0/24 dev eth0 proto kernel scope link src 192.168.122.197 # ip addr flush eth0 # ip addr add 192.168.122.10 dev eth0 # ip addr show eth0 51: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP qlen 1000 link/ether 00:16:3e:89:6b:d7 brd ff:ff:ff:ff:ff:ff inet 192.168.122.10/32 scope global eth0 valid_lft forever preferred_lft forever # ip route add 192.168.122.0/24 via 192.168.122.10 # ip route 192.168.122.0/24 via 192.168.122.10 dev eth0 Signed-off-by: Laurent Vivier <laurent@vivier.eu> --- v2: Check domain before opening socket Remove cast to int of sizeof() Move NLMSG_DONE into the switch() Fix '{' in 'case:' Reorder data types by type size Add new conversions (IFLA_STATS, IFLA_STATS64, IFLA_MAP) Add warning for nested type (not supported) Add logs with gemu_log() Don't convert rta_len and rta_type in the error case linux-user/syscall.c | 581 ++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 575 insertions(+), 6 deletions(-)