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Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/syscall.c86
-rw-r--r--linux-user/syscall_defs.h4
2 files changed, 80 insertions, 10 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index ccdbc4e321..1f64867eba 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -1904,23 +1904,16 @@ static abi_long do_connect(int sockfd, abi_ulong target_addr,
return get_errno(connect(sockfd, addr, addrlen));
}
-/* do_sendrecvmsg() Must return target values and target errnos. */
-static abi_long do_sendrecvmsg(int fd, abi_ulong target_msg,
- int flags, int send)
+/* do_sendrecvmsg_locked() Must return target values and target errnos. */
+static abi_long do_sendrecvmsg_locked(int fd, struct target_msghdr *msgp,
+ int flags, int send)
{
abi_long ret, len;
- struct target_msghdr *msgp;
struct msghdr msg;
int count;
struct iovec *vec;
abi_ulong target_vec;
- /* FIXME */
- if (!lock_user_struct(send ? VERIFY_READ : VERIFY_WRITE,
- msgp,
- target_msg,
- send ? 1 : 0))
- return -TARGET_EFAULT;
if (msgp->msg_name) {
msg.msg_namelen = tswap32(msgp->msg_namelen);
msg.msg_name = alloca(msg.msg_namelen);
@@ -1975,10 +1968,75 @@ static abi_long do_sendrecvmsg(int fd, abi_ulong target_msg,
out:
unlock_iovec(vec, target_vec, count, !send);
out2:
+ return ret;
+}
+
+static abi_long do_sendrecvmsg(int fd, abi_ulong target_msg,
+ int flags, int send)
+{
+ abi_long ret;
+ struct target_msghdr *msgp;
+
+ if (!lock_user_struct(send ? VERIFY_READ : VERIFY_WRITE,
+ msgp,
+ target_msg,
+ send ? 1 : 0)) {
+ return -TARGET_EFAULT;
+ }
+ ret = do_sendrecvmsg_locked(fd, msgp, flags, send);
unlock_user_struct(msgp, target_msg, send ? 0 : 1);
return ret;
}
+#ifdef TARGET_NR_sendmmsg
+/* We don't rely on the C library to have sendmmsg/recvmmsg support,
+ * so it might not have this *mmsg-specific flag either.
+ */
+#ifndef MSG_WAITFORONE
+#define MSG_WAITFORONE 0x10000
+#endif
+
+static abi_long do_sendrecvmmsg(int fd, abi_ulong target_msgvec,
+ unsigned int vlen, unsigned int flags,
+ int send)
+{
+ struct target_mmsghdr *mmsgp;
+ abi_long ret = 0;
+ int i;
+
+ if (vlen > UIO_MAXIOV) {
+ vlen = UIO_MAXIOV;
+ }
+
+ mmsgp = lock_user(VERIFY_WRITE, target_msgvec, sizeof(*mmsgp) * vlen, 1);
+ if (!mmsgp) {
+ return -TARGET_EFAULT;
+ }
+
+ for (i = 0; i < vlen; i++) {
+ ret = do_sendrecvmsg_locked(fd, &mmsgp[i].msg_hdr, flags, send);
+ if (is_error(ret)) {
+ break;
+ }
+ mmsgp[i].msg_len = tswap32(ret);
+ /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */
+ if (flags & MSG_WAITFORONE) {
+ flags |= MSG_DONTWAIT;
+ }
+ }
+
+ unlock_user(mmsgp, target_msgvec, sizeof(*mmsgp) * i);
+
+ /* Return number of datagrams sent if we sent any at all;
+ * otherwise return the error.
+ */
+ if (i) {
+ return i;
+ }
+ return ret;
+}
+#endif
+
/* If we don't have a system accept4() then just call accept.
* The callsites to do_accept4() will ensure that they don't
* pass a non-zero flags argument in this config.
@@ -6716,6 +6774,14 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
ret = do_sendrecvmsg(arg1, arg2, arg3, 1);
break;
#endif
+#ifdef TARGET_NR_sendmmsg
+ case TARGET_NR_sendmmsg:
+ ret = do_sendrecvmmsg(arg1, arg2, arg3, arg4, 1);
+ break;
+ case TARGET_NR_recvmmsg:
+ ret = do_sendrecvmmsg(arg1, arg2, arg3, arg4, 0);
+ break;
+#endif
#ifdef TARGET_NR_sendto
case TARGET_NR_sendto:
ret = do_sendto(arg1, arg2, arg3, arg4, arg5, arg6);
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index d55f396c9e..732c9e3dbb 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -240,6 +240,10 @@ __target_cmsg_nxthdr (struct target_msghdr *__mhdr, struct target_cmsghdr *__cms
return __cmsg;
}
+struct target_mmsghdr {
+ struct target_msghdr msg_hdr; /* Message header */
+ unsigned int msg_len; /* Number of bytes transmitted */
+};
struct target_rusage {
struct target_timeval ru_utime; /* user time used */