Update to FreeBSD head 2016-08-23

Git mirror commit 9fe7c416e6abb28b1398fd3e5687099846800cfd.

1 files changed, 546 insertions, 35 deletions

diff --git a/freebsd/sys/kern/sys_socket.c b/freebsd/sys/kern/sys_socket.c
index babbcd2c..f312c8f4 100644
--- a/freebsd/sys/kern/sys_socket.c
+++ b/freebsd/sys/kern/sys_socket.c
@@ -36,8 +36,13 @@ __FBSDID("$FreeBSD$");
 
 #include <rtems/bsd/sys/param.h>
 #include <sys/systm.h>
+#include <sys/aio.h>
+#include <sys/domain.h>
 #include <sys/file.h>
 #include <sys/filedesc.h>
+#include <sys/kernel.h>
+#include <sys/kthread.h>
+#include <sys/malloc.h>
 #include <sys/proc.h>
 #include <sys/protosw.h>
 #include <sys/sigio.h>
@@ -48,20 +53,58 @@ __FBSDID("$FreeBSD$");
 #include <sys/filio.h>			/* XXX */
 #include <sys/sockio.h>
 #include <sys/stat.h>
+#include <sys/sysctl.h>
+#include <sys/sysproto.h>
+#include <sys/taskqueue.h>
 #include <sys/uio.h>
 #include <sys/ucred.h>
+#include <sys/un.h>
+#include <sys/unpcb.h>
+#include <sys/user.h>
 
 #include <net/if.h>
+#include <net/if_var.h>
 #include <net/route.h>
 #include <net/vnet.h>
 
+#include <netinet/in.h>
+#include <netinet/in_pcb.h>
+
 #include <security/mac/mac_framework.h>
 
 #ifndef __rtems__
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_extern.h>
+#include <vm/vm_map.h>
+
+static SYSCTL_NODE(_kern_ipc, OID_AUTO, aio, CTLFLAG_RD, NULL,
+    "socket AIO stats");
+
+static int empty_results;
+SYSCTL_INT(_kern_ipc_aio, OID_AUTO, empty_results, CTLFLAG_RD, &empty_results,
+    0, "socket operation returned EAGAIN");
+
+static int empty_retries;
+SYSCTL_INT(_kern_ipc_aio, OID_AUTO, empty_retries, CTLFLAG_RD, &empty_retries,
+    0, "socket operation retries");
+
+static fo_rdwr_t soo_read;
+static fo_rdwr_t soo_write;
+static fo_ioctl_t soo_ioctl;
+static fo_poll_t soo_poll;
+extern fo_kqfilter_t soo_kqfilter;
+static fo_stat_t soo_stat;
+static fo_close_t soo_close;
+static fo_fill_kinfo_t soo_fill_kinfo;
+static fo_aio_queue_t soo_aio_queue;
+
+static void	soo_aio_cancel(struct kaiocb *job);
+
 struct fileops	socketops = {
 	.fo_read = soo_read,
 	.fo_write = soo_write,
-	.fo_truncate = soo_truncate,
+	.fo_truncate = invfo_truncate,
 	.fo_ioctl = soo_ioctl,
 	.fo_poll = soo_poll,
 	.fo_kqfilter = soo_kqfilter,
@@ -69,15 +112,18 @@ struct fileops	socketops = {
 	.fo_close = soo_close,
 	.fo_chmod = invfo_chmod,
 	.fo_chown = invfo_chown,
+	.fo_sendfile = invfo_sendfile,
+	.fo_fill_kinfo = soo_fill_kinfo,
+	.fo_aio_queue = soo_aio_queue,
 	.fo_flags = DFLAG_PASSABLE
 };
 #endif /* __rtems__ */
 
-/* ARGSUSED */
 #ifdef __rtems__
-static
-#endif /* __rtems__ */
 int
+#else /* __rtems__ */
+static int
+#endif /* __rtems__ */
 soo_read(struct file *fp, struct uio *uio, struct ucred *active_cred,
     int flags, struct thread *td)
 {
@@ -127,11 +173,11 @@ rtems_bsd_soo_read(rtems_libio_t *iop, void *buffer, size_t count)
 }
 #endif /* __rtems__ */
 
-/* ARGSUSED */
 #ifdef __rtems__
-static
-#endif /* __rtems__ */
 int
+#else /* __rtems__ */
+static int
+#endif /* __rtems__ */
 soo_write(struct file *fp, struct uio *uio, struct ucred *active_cred,
     int flags, struct thread *td)
 {
@@ -190,20 +236,11 @@ rtems_bsd_soo_write(rtems_libio_t *iop, const void *buffer, size_t count)
 }
 #endif /* __rtems__ */
 
-#ifndef __rtems__
-int
-soo_truncate(struct file *fp, off_t length, struct ucred *active_cred,
-    struct thread *td)
-{
-
-	return (EINVAL);
-}
-#endif /* __rtems__ */
-
 #ifdef __rtems__
-static
-#endif /* __rtems__ */
 int
+#else /* __rtems__ */
+static int
+#endif /* __rtems__ */
 soo_ioctl(struct file *fp, u_long cmd, void *data, struct ucred *active_cred,
     struct thread *td)
 {
@@ -252,16 +289,17 @@ soo_ioctl(struct file *fp, u_long cmd, void *data, struct ucred *active_cred,
 
 	case FIONREAD:
 		/* Unlocked read. */
-		*(int *)data = so->so_rcv.sb_cc;
+		*(int *)data = sbavail(&so->so_rcv);
 		break;
 
 	case FIONWRITE:
 		/* Unlocked read. */
-		*(int *)data = so->so_snd.sb_cc;
+		*(int *)data = sbavail(&so->so_snd);
 		break;
 
 	case FIONSPACE:
-		if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc) ||
+		/* Unlocked read. */
+		if ((so->so_snd.sb_hiwat < sbused(&so->so_snd)) ||
 		    (so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt))
 			*(int *)data = 0;
 		else
@@ -329,9 +367,10 @@ rtems_bsd_soo_ioctl(rtems_libio_t *iop, ioctl_command_t request, void *buffer)
 #endif /* __rtems__ */
 
 #ifdef __rtems__
-static
-#endif /* __rtems__ */
 int
+#else /* __rtems__ */
+static int
+#endif /* __rtems__ */
 soo_poll(struct file *fp, int events, struct ucred *active_cred,
     struct thread *td)
 {
@@ -363,7 +402,7 @@ rtems_bsd_soo_poll(rtems_libio_t *iop, int events)
 		error = ENOMEM;
 	}
 
-	return error;
+	return (error);
 }
 #endif /* __rtems__ */
 
@@ -378,6 +417,7 @@ static int
 soo_stat(struct socket *so, struct stat *ub)
 {
 #endif /* __rtems__ */
+	struct sockbuf *sb;
 #ifdef MAC
 	int error;
 #endif
@@ -395,15 +435,18 @@ soo_stat(struct socket *so, struct stat *ub)
 	 * If SBS_CANTRCVMORE is set, but there's still data left in the
 	 * receive buffer, the socket is still readable.
 	 */
-	SOCKBUF_LOCK(&so->so_rcv);
-	if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) == 0 ||
-	    so->so_rcv.sb_cc != 0)
+	sb = &so->so_rcv;
+	SOCKBUF_LOCK(sb);
+	if ((sb->sb_state & SBS_CANTRCVMORE) == 0 || sbavail(sb))
 		ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
-	ub->st_size = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
-	SOCKBUF_UNLOCK(&so->so_rcv);
-	/* Unlocked read. */
-	if ((so->so_snd.sb_state & SBS_CANTSENDMORE) == 0)
+	ub->st_size = sbavail(sb) - sb->sb_ctl;
+	SOCKBUF_UNLOCK(sb);
+
+	sb = &so->so_snd;
+	SOCKBUF_LOCK(sb);
+	if ((sb->sb_state & SBS_CANTSENDMORE) == 0)
 		ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
+	SOCKBUF_UNLOCK(sb);
 #ifndef __rtems__
 	ub->st_uid = so->so_cred->cr_uid;
 	ub->st_gid = so->so_cred->cr_gid;
@@ -433,11 +476,11 @@ rtems_bsd_soo_stat(
  * file reference but the actual socket will not go away until the socket's
  * ref count hits 0.
  */
-/* ARGSUSED */
 #ifdef __rtems__
-static
-#endif /* __rtems__ */
 int
+#else /* __rtems__ */
+static int
+#endif /* __rtems__ */
 soo_close(struct file *fp, struct thread *td)
 {
 	int error = 0;
@@ -460,6 +503,474 @@ soo_close(struct file *fp, struct thread *td)
 		error = soclose(so);
 	return (error);
 }
+
+#ifndef __rtems__
+static int
+soo_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
+{
+	struct sockaddr *sa;
+	struct inpcb *inpcb;
+	struct unpcb *unpcb;
+	struct socket *so;
+	int error;
+
+	kif->kf_type = KF_TYPE_SOCKET;
+	so = fp->f_data;
+	kif->kf_sock_domain = so->so_proto->pr_domain->dom_family;
+	kif->kf_sock_type = so->so_type;
+	kif->kf_sock_protocol = so->so_proto->pr_protocol;
+	kif->kf_un.kf_sock.kf_sock_pcb = (uintptr_t)so->so_pcb;
+	switch (kif->kf_sock_domain) {
+	case AF_INET:
+	case AF_INET6:
+		if (kif->kf_sock_protocol == IPPROTO_TCP) {
+			if (so->so_pcb != NULL) {
+				inpcb = (struct inpcb *)(so->so_pcb);
+				kif->kf_un.kf_sock.kf_sock_inpcb =
+				    (uintptr_t)inpcb->inp_ppcb;
+			}
+		}
+		break;
+	case AF_UNIX:
+		if (so->so_pcb != NULL) {
+			unpcb = (struct unpcb *)(so->so_pcb);
+			if (unpcb->unp_conn) {
+				kif->kf_un.kf_sock.kf_sock_unpconn =
+				    (uintptr_t)unpcb->unp_conn;
+				kif->kf_un.kf_sock.kf_sock_rcv_sb_state =
+				    so->so_rcv.sb_state;
+				kif->kf_un.kf_sock.kf_sock_snd_sb_state =
+				    so->so_snd.sb_state;
+			}
+		}
+		break;
+	}
+	error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
+	if (error == 0 && sa->sa_len <= sizeof(kif->kf_sa_local)) {
+		bcopy(sa, &kif->kf_sa_local, sa->sa_len);
+		free(sa, M_SONAME);
+	}
+	error = so->so_proto->pr_usrreqs->pru_peeraddr(so, &sa);
+	if (error == 0 && sa->sa_len <= sizeof(kif->kf_sa_peer)) {
+		bcopy(sa, &kif->kf_sa_peer, sa->sa_len);
+		free(sa, M_SONAME);
+	}
+	strncpy(kif->kf_path, so->so_proto->pr_domain->dom_name,
+	    sizeof(kif->kf_path));
+	return (0);	
+}
+
+/*
+ * Use the 'backend3' field in AIO jobs to store the amount of data
+ * completed by the AIO job so far.
+ */
+#define	aio_done	backend3
+
+static STAILQ_HEAD(, task) soaio_jobs;
+static struct mtx soaio_jobs_lock;
+static struct task soaio_kproc_task;
+static int soaio_starting, soaio_idle, soaio_queued;
+static struct unrhdr *soaio_kproc_unr;
+
+static int soaio_max_procs = MAX_AIO_PROCS;
+SYSCTL_INT(_kern_ipc_aio, OID_AUTO, max_procs, CTLFLAG_RW, &soaio_max_procs, 0,
+    "Maximum number of kernel processes to use for async socket IO");
+
+static int soaio_num_procs;
+SYSCTL_INT(_kern_ipc_aio, OID_AUTO, num_procs, CTLFLAG_RD, &soaio_num_procs, 0,
+    "Number of active kernel processes for async socket IO");
+
+static int soaio_target_procs = TARGET_AIO_PROCS;
+SYSCTL_INT(_kern_ipc_aio, OID_AUTO, target_procs, CTLFLAG_RD,
+    &soaio_target_procs, 0,
+    "Preferred number of ready kernel processes for async socket IO");
+
+static int soaio_lifetime;
+SYSCTL_INT(_kern_ipc_aio, OID_AUTO, lifetime, CTLFLAG_RW, &soaio_lifetime, 0,
+    "Maximum lifetime for idle aiod");
+
+static void
+soaio_kproc_loop(void *arg)
+{
+	struct proc *p;
+	struct vmspace *myvm;
+	struct task *task;
+	int error, id, pending;
+
+	id = (intptr_t)arg;
+
+	/*
+	 * Grab an extra reference on the daemon's vmspace so that it
+	 * doesn't get freed by jobs that switch to a different
+	 * vmspace.
+	 */
+	p = curproc;
+	myvm = vmspace_acquire_ref(p);
+
+	mtx_lock(&soaio_jobs_lock);
+	MPASS(soaio_starting > 0);
+	soaio_starting--;
+	for (;;) {
+		while (!STAILQ_EMPTY(&soaio_jobs)) {
+			task = STAILQ_FIRST(&soaio_jobs);
+			STAILQ_REMOVE_HEAD(&soaio_jobs, ta_link);
+			soaio_queued--;
+			pending = task->ta_pending;
+			task->ta_pending = 0;
+			mtx_unlock(&soaio_jobs_lock);
+
+			task->ta_func(task->ta_context, pending);
+
+			mtx_lock(&soaio_jobs_lock);
+		}
+		MPASS(soaio_queued == 0);
+
+		if (p->p_vmspace != myvm) {
+			mtx_unlock(&soaio_jobs_lock);
+			vmspace_switch_aio(myvm);
+			mtx_lock(&soaio_jobs_lock);
+			continue;
+		}
+
+		soaio_idle++;
+		error = mtx_sleep(&soaio_idle, &soaio_jobs_lock, 0, "-",
+		    soaio_lifetime);
+		soaio_idle--;
+		if (error == EWOULDBLOCK && STAILQ_EMPTY(&soaio_jobs) &&
+		    soaio_num_procs > soaio_target_procs)
+			break;
+	}
+	soaio_num_procs--;
+	mtx_unlock(&soaio_jobs_lock);
+	free_unr(soaio_kproc_unr, id);
+	kproc_exit(0);
+}
+
+static void
+soaio_kproc_create(void *context, int pending)
+{
+	struct proc *p;
+	int error, id;
+
+	mtx_lock(&soaio_jobs_lock);
+	for (;;) {
+		if (soaio_num_procs < soaio_target_procs) {
+			/* Must create */
+		} else if (soaio_num_procs >= soaio_max_procs) {
+			/*
+			 * Hit the limit on kernel processes, don't
+			 * create another one.
+			 */
+			break;
+		} else if (soaio_queued <= soaio_idle + soaio_starting) {
+			/*
+			 * No more AIO jobs waiting for a process to be
+			 * created, so stop.
+			 */
+			break;
+		}
+		soaio_starting++;
+		mtx_unlock(&soaio_jobs_lock);
+
+		id = alloc_unr(soaio_kproc_unr);
+		error = kproc_create(soaio_kproc_loop, (void *)(intptr_t)id,
+		    &p, 0, 0, "soaiod%d", id);
+		if (error != 0) {
+			free_unr(soaio_kproc_unr, id);
+			mtx_lock(&soaio_jobs_lock);
+			soaio_starting--;
+			break;
+		}
+
+		mtx_lock(&soaio_jobs_lock);
+		soaio_num_procs++;
+	}
+	mtx_unlock(&soaio_jobs_lock);
+}
+
+void
+soaio_enqueue(struct task *task)
+{
+
+	mtx_lock(&soaio_jobs_lock);
+	MPASS(task->ta_pending == 0);
+	task->ta_pending++;
+	STAILQ_INSERT_TAIL(&soaio_jobs, task, ta_link);
+	soaio_queued++;
+	if (soaio_queued <= soaio_idle)
+		wakeup_one(&soaio_idle);
+	else if (soaio_num_procs < soaio_max_procs)
+		taskqueue_enqueue(taskqueue_thread, &soaio_kproc_task);
+	mtx_unlock(&soaio_jobs_lock);
+}
+
+static void
+soaio_init(void)
+{
+
+	soaio_lifetime = AIOD_LIFETIME_DEFAULT;
+	STAILQ_INIT(&soaio_jobs);
+	mtx_init(&soaio_jobs_lock, "soaio jobs", NULL, MTX_DEF);
+	soaio_kproc_unr = new_unrhdr(1, INT_MAX, NULL);
+	TASK_INIT(&soaio_kproc_task, 0, soaio_kproc_create, NULL);
+	if (soaio_target_procs > 0)
+		taskqueue_enqueue(taskqueue_thread, &soaio_kproc_task);
+}
+SYSINIT(soaio, SI_SUB_VFS, SI_ORDER_ANY, soaio_init, NULL);
+
+static __inline int
+soaio_ready(struct socket *so, struct sockbuf *sb)
+{
+	return (sb == &so->so_rcv ? soreadable(so) : sowriteable(so));
+}
+
+static void
+soaio_process_job(struct socket *so, struct sockbuf *sb, struct kaiocb *job)
+{
+	struct ucred *td_savedcred;
+	struct thread *td;
+	struct file *fp;
+	struct uio uio;
+	struct iovec iov;
+	size_t cnt, done;
+	long ru_before;
+	int error, flags;
+
+	SOCKBUF_UNLOCK(sb);
+	aio_switch_vmspace(job);
+	td = curthread;
+	fp = job->fd_file;
+retry:
+	td_savedcred = td->td_ucred;
+	td->td_ucred = job->cred;
+
+	done = job->aio_done;
+	cnt = job->uaiocb.aio_nbytes - done;
+	iov.iov_base = (void *)((uintptr_t)job->uaiocb.aio_buf + done);
+	iov.iov_len = cnt;
+	uio.uio_iov = &iov;
+	uio.uio_iovcnt = 1;
+	uio.uio_offset = 0;
+	uio.uio_resid = cnt;
+	uio.uio_segflg = UIO_USERSPACE;
+	uio.uio_td = td;
+	flags = MSG_NBIO;
+
+	/*
+	 * For resource usage accounting, only count a completed request
+	 * as a single message to avoid counting multiple calls to
+	 * sosend/soreceive on a blocking socket.
+	 */
+
+	if (sb == &so->so_rcv) {
+		uio.uio_rw = UIO_READ;
+		ru_before = td->td_ru.ru_msgrcv;
+#ifdef MAC
+		error = mac_socket_check_receive(fp->f_cred, so);
+		if (error == 0)
+
+#endif
+			error = soreceive(so, NULL, &uio, NULL, NULL, &flags);
+		if (td->td_ru.ru_msgrcv != ru_before)
+			job->msgrcv = 1;
+	} else {
+		uio.uio_rw = UIO_WRITE;
+		ru_before = td->td_ru.ru_msgsnd;
+#ifdef MAC
+		error = mac_socket_check_send(fp->f_cred, so);
+		if (error == 0)
+#endif
+			error = sosend(so, NULL, &uio, NULL, NULL, flags, td);
+		if (td->td_ru.ru_msgsnd != ru_before)
+			job->msgsnd = 1;
+		if (error == EPIPE && (so->so_options & SO_NOSIGPIPE) == 0) {
+			PROC_LOCK(job->userproc);
+			kern_psignal(job->userproc, SIGPIPE);
+			PROC_UNLOCK(job->userproc);
+		}
+	}
+
+	done += cnt - uio.uio_resid;
+	job->aio_done = done;
+	td->td_ucred = td_savedcred;
+
+	if (error == EWOULDBLOCK) {
+		/*
+		 * The request was either partially completed or not
+		 * completed at all due to racing with a read() or
+		 * write() on the socket.  If the socket is
+		 * non-blocking, return with any partial completion.
+		 * If the socket is blocking or if no progress has
+		 * been made, requeue this request at the head of the
+		 * queue to try again when the socket is ready.
+		 */
+		MPASS(done != job->uaiocb.aio_nbytes);
+		SOCKBUF_LOCK(sb);
+		if (done == 0 || !(so->so_state & SS_NBIO)) {
+			empty_results++;
+			if (soaio_ready(so, sb)) {
+				empty_retries++;
+				SOCKBUF_UNLOCK(sb);
+				goto retry;
+			}
+			
+			if (!aio_set_cancel_function(job, soo_aio_cancel)) {
+				SOCKBUF_UNLOCK(sb);
+				if (done != 0)
+					aio_complete(job, done, 0);
+				else
+					aio_cancel(job);
+				SOCKBUF_LOCK(sb);
+			} else {
+				TAILQ_INSERT_HEAD(&sb->sb_aiojobq, job, list);
+			}
+			return;
+		}
+		SOCKBUF_UNLOCK(sb);
+	}		
+	if (done != 0 && (error == ERESTART || error == EINTR ||
+	    error == EWOULDBLOCK))
+		error = 0;
+	if (error)
+		aio_complete(job, -1, error);
+	else
+		aio_complete(job, done, 0);
+	SOCKBUF_LOCK(sb);
+}
+
+static void
+soaio_process_sb(struct socket *so, struct sockbuf *sb)
+{
+	struct kaiocb *job;
+
+	SOCKBUF_LOCK(sb);
+	while (!TAILQ_EMPTY(&sb->sb_aiojobq) && soaio_ready(so, sb)) {
+		job = TAILQ_FIRST(&sb->sb_aiojobq);
+		TAILQ_REMOVE(&sb->sb_aiojobq, job, list);
+		if (!aio_clear_cancel_function(job))
+			continue;
+
+		soaio_process_job(so, sb, job);
+	}
+
+	/*
+	 * If there are still pending requests, the socket must not be
+	 * ready so set SB_AIO to request a wakeup when the socket
+	 * becomes ready.
+	 */
+	if (!TAILQ_EMPTY(&sb->sb_aiojobq))
+		sb->sb_flags |= SB_AIO;
+	sb->sb_flags &= ~SB_AIO_RUNNING;
+	SOCKBUF_UNLOCK(sb);
+
+	ACCEPT_LOCK();
+	SOCK_LOCK(so);
+	sorele(so);
+}
+
+void
+soaio_rcv(void *context, int pending)
+{
+	struct socket *so;
+
+	so = context;
+	soaio_process_sb(so, &so->so_rcv);
+}
+
+void
+soaio_snd(void *context, int pending)
+{
+	struct socket *so;
+
+	so = context;
+	soaio_process_sb(so, &so->so_snd);
+}
+
+void
+sowakeup_aio(struct socket *so, struct sockbuf *sb)
+{
+
+	SOCKBUF_LOCK_ASSERT(sb);
+	sb->sb_flags &= ~SB_AIO;
+	if (sb->sb_flags & SB_AIO_RUNNING)
+		return;
+	sb->sb_flags |= SB_AIO_RUNNING;
+	if (sb == &so->so_snd)
+		SOCK_LOCK(so);
+	soref(so);
+	if (sb == &so->so_snd)
+		SOCK_UNLOCK(so);
+	soaio_enqueue(&sb->sb_aiotask);
+}
+
+static void
+soo_aio_cancel(struct kaiocb *job)
+{
+	struct socket *so;
+	struct sockbuf *sb;
+	long done;
+	int opcode;
+
+	so = job->fd_file->f_data;
+	opcode = job->uaiocb.aio_lio_opcode;
+	if (opcode == LIO_READ)
+		sb = &so->so_rcv;
+	else {
+		MPASS(opcode == LIO_WRITE);
+		sb = &so->so_snd;
+	}
+
+	SOCKBUF_LOCK(sb);
+	if (!aio_cancel_cleared(job))
+		TAILQ_REMOVE(&sb->sb_aiojobq, job, list);
+	if (TAILQ_EMPTY(&sb->sb_aiojobq))
+		sb->sb_flags &= ~SB_AIO;
+	SOCKBUF_UNLOCK(sb);
+
+	done = job->aio_done;
+	if (done != 0)
+		aio_complete(job, done, 0);
+	else
+		aio_cancel(job);
+}
+
+static int
+soo_aio_queue(struct file *fp, struct kaiocb *job)
+{
+	struct socket *so;
+	struct sockbuf *sb;
+	int error;
+
+	so = fp->f_data;
+	error = (*so->so_proto->pr_usrreqs->pru_aio_queue)(so, job);
+	if (error == 0)
+		return (0);
+
+	switch (job->uaiocb.aio_lio_opcode) {
+	case LIO_READ:
+		sb = &so->so_rcv;
+		break;
+	case LIO_WRITE:
+		sb = &so->so_snd;
+		break;
+	default:
+		return (EINVAL);
+	}
+
+	SOCKBUF_LOCK(sb);
+	if (!aio_set_cancel_function(job, soo_aio_cancel))
+		panic("new job was cancelled");
+	TAILQ_INSERT_TAIL(&sb->sb_aiojobq, job, list);
+	if (!(sb->sb_flags & SB_AIO_RUNNING)) {
+		if (soaio_ready(so, sb))
+			sowakeup_aio(so, sb);
+		else
+			sb->sb_flags |= SB_AIO;
+	}
+	SOCKBUF_UNLOCK(sb);
+	return (0);
+}
+#endif /* __rtems__ */
 #ifdef __rtems__
 static int
 rtems_bsd_soo_open(rtems_libio_t *iop, const char *path, int oflag,