1 files changed, 373 insertions, 0 deletions
diff --git a/src/spdk/lib/sock/sock.c b/src/spdk/lib/sock/sock.c
new file mode 100644
index 00000000..d31aa9b0
--- /dev/null
+++ b/src/spdk/lib/sock/sock.c
@@ -0,0 +1,373 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "spdk/stdinc.h"
+
+#include "spdk/log.h"
+#include "spdk/sock.h"
+#include "spdk_internal/sock.h"
+#include "spdk/queue.h"
+
+static STAILQ_HEAD(, spdk_net_impl) g_net_impls = STAILQ_HEAD_INITIALIZER(g_net_impls);
+
+int
+spdk_sock_getaddr(struct spdk_sock *sock, char *saddr, int slen, uint16_t *sport,
+		  char *caddr, int clen, uint16_t *cport)
+{
+	return sock->net_impl->getaddr(sock, saddr, slen, sport, caddr, clen, cport);
+}
+
+struct spdk_sock *
+spdk_sock_connect(const char *ip, int port)
+{
+	struct spdk_net_impl *impl = NULL;
+	struct spdk_sock *sock;
+
+	STAILQ_FOREACH_FROM(impl, &g_net_impls, link) {
+		sock = impl->connect(ip, port);
+		if (sock != NULL) {
+			sock->net_impl = impl;
+			return sock;
+		}
+	}
+
+	return NULL;
+}
+
+struct spdk_sock *
+spdk_sock_listen(const char *ip, int port)
+{
+	struct spdk_net_impl *impl = NULL;
+	struct spdk_sock *sock;
+
+	STAILQ_FOREACH_FROM(impl, &g_net_impls, link) {
+		sock = impl->listen(ip, port);
+		if (sock != NULL) {
+			sock->net_impl = impl;
+			return sock;
+		}
+	}
+
+	return NULL;
+}
+
+struct spdk_sock *
+spdk_sock_accept(struct spdk_sock *sock)
+{
+	struct spdk_sock *new_sock;
+
+	new_sock = sock->net_impl->accept(sock);
+	if (new_sock != NULL) {
+		new_sock->net_impl = sock->net_impl;
+	}
+
+	return new_sock;
+}
+
+int
+spdk_sock_close(struct spdk_sock **sock)
+{
+	int rc;
+
+	if (*sock == NULL) {
+		errno = EBADF;
+		return -1;
+	}
+
+	if ((*sock)->cb_fn != NULL) {
+		/* This sock is still part of a sock_group. */
+		errno = EBUSY;
+		return -1;
+	}
+
+	rc = (*sock)->net_impl->close(*sock);
+	if (rc == 0) {
+		*sock = NULL;
+	}
+
+	return rc;
+}
+
+ssize_t
+spdk_sock_recv(struct spdk_sock *sock, void *buf, size_t len)
+{
+	if (sock == NULL) {
+		errno = EBADF;
+		return -1;
+	}
+
+	return sock->net_impl->recv(sock, buf, len);
+}
+
+ssize_t
+spdk_sock_writev(struct spdk_sock *sock, struct iovec *iov, int iovcnt)
+{
+	if (sock == NULL) {
+		errno = EBADF;
+		return -1;
+	}
+
+	return sock->net_impl->writev(sock, iov, iovcnt);
+}
+
+
+int
+spdk_sock_set_recvlowat(struct spdk_sock *sock, int nbytes)
+{
+	return sock->net_impl->set_recvlowat(sock, nbytes);
+}
+
+int
+spdk_sock_set_recvbuf(struct spdk_sock *sock, int sz)
+{
+	return sock->net_impl->set_recvbuf(sock, sz);
+}
+
+int
+spdk_sock_set_sendbuf(struct spdk_sock *sock, int sz)
+{
+	return sock->net_impl->set_sendbuf(sock, sz);
+}
+
+bool
+spdk_sock_is_ipv6(struct spdk_sock *sock)
+{
+	return sock->net_impl->is_ipv6(sock);
+}
+
+bool
+spdk_sock_is_ipv4(struct spdk_sock *sock)
+{
+	return sock->net_impl->is_ipv4(sock);
+}
+
+struct spdk_sock_group *
+spdk_sock_group_create(void)
+{
+	struct spdk_net_impl *impl = NULL;
+	struct spdk_sock_group *group;
+	struct spdk_sock_group_impl *group_impl;
+
+	group = calloc(1, sizeof(*group));
+	if (group == NULL) {
+		return NULL;
+	}
+
+	STAILQ_INIT(&group->group_impls);
+
+	STAILQ_FOREACH_FROM(impl, &g_net_impls, link) {
+		group_impl = impl->group_impl_create();
+		if (group_impl != NULL) {
+			STAILQ_INSERT_TAIL(&group->group_impls, group_impl, link);
+			TAILQ_INIT(&group_impl->socks);
+			group_impl->net_impl = impl;
+		}
+	}
+
+	return group;
+}
+
+int
+spdk_sock_group_add_sock(struct spdk_sock_group *group, struct spdk_sock *sock,
+			 spdk_sock_cb cb_fn, void *cb_arg)
+{
+	struct spdk_sock_group_impl *group_impl = NULL;
+	int rc;
+
+	if (cb_fn == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (sock->cb_fn != NULL) {
+		/*
+		 * This sock is already part of a sock_group.  Currently we don't
+		 *  support this.
+		 */
+		errno = EBUSY;
+		return -1;
+	}
+
+	STAILQ_FOREACH_FROM(group_impl, &group->group_impls, link) {
+		if (sock->net_impl == group_impl->net_impl) {
+			break;
+		}
+	}
+
+	if (group_impl == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	rc = group_impl->net_impl->group_impl_add_sock(group_impl, sock);
+	if (rc == 0) {
+		TAILQ_INSERT_TAIL(&group_impl->socks, sock, link);
+		sock->cb_fn = cb_fn;
+		sock->cb_arg = cb_arg;
+	}
+
+	return rc;
+}
+
+int
+spdk_sock_group_remove_sock(struct spdk_sock_group *group, struct spdk_sock *sock)
+{
+	struct spdk_sock_group_impl *group_impl = NULL;
+	int rc;
+
+	STAILQ_FOREACH_FROM(group_impl, &group->group_impls, link) {
+		if (sock->net_impl == group_impl->net_impl) {
+			break;
+		}
+	}
+
+	if (group_impl == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	rc = group_impl->net_impl->group_impl_remove_sock(group_impl, sock);
+	if (rc == 0) {
+		TAILQ_REMOVE(&group_impl->socks, sock, link);
+		sock->cb_fn = NULL;
+		sock->cb_arg = NULL;
+	}
+
+	return rc;
+}
+
+int
+spdk_sock_group_poll(struct spdk_sock_group *group)
+{
+	return spdk_sock_group_poll_count(group, MAX_EVENTS_PER_POLL);
+}
+
+static int
+spdk_sock_group_impl_poll_count(struct spdk_sock_group_impl *group_impl,
+				struct spdk_sock_group *group,
+				int max_events)
+{
+	struct spdk_sock *socks[MAX_EVENTS_PER_POLL];
+	int num_events, i;
+
+	if (TAILQ_EMPTY(&group_impl->socks)) {
+		return 0;
+	}
+
+	num_events = group_impl->net_impl->group_impl_poll(group_impl, max_events, socks);
+	if (num_events == -1) {
+		return -1;
+	}
+
+	for (i = 0; i < num_events; i++) {
+		struct spdk_sock *sock = socks[i];
+
+		assert(sock->cb_fn != NULL);
+		sock->cb_fn(sock->cb_arg, group, sock);
+	}
+	return 0;
+}
+
+int
+spdk_sock_group_poll_count(struct spdk_sock_group *group, int max_events)
+{
+	struct spdk_sock_group_impl *group_impl = NULL;
+	int rc, final_rc = 0;
+
+	if (max_events < 1) {
+		errno = -EINVAL;
+		return -1;
+	}
+
+	/*
+	 * Only poll for up to 32 events at a time - if more events are pending,
+	 *  the next call to this function will reap them.
+	 */
+	if (max_events > MAX_EVENTS_PER_POLL) {
+		max_events = MAX_EVENTS_PER_POLL;
+	}
+
+	STAILQ_FOREACH_FROM(group_impl, &group->group_impls, link) {
+		rc = spdk_sock_group_impl_poll_count(group_impl, group, max_events);
+		if (rc != 0) {
+			final_rc = rc;
+			SPDK_ERRLOG("group_impl_poll_count for net(%s) failed\n",
+				    group_impl->net_impl->name);
+		}
+	}
+
+	return final_rc;
+}
+
+int
+spdk_sock_group_close(struct spdk_sock_group **group)
+{
+	struct spdk_sock_group_impl *group_impl = NULL, *tmp;
+	int rc;
+
+	if (*group == NULL) {
+		errno = EBADF;
+		return -1;
+	}
+
+	STAILQ_FOREACH_SAFE(group_impl, &(*group)->group_impls, link, tmp) {
+		if (!TAILQ_EMPTY(&group_impl->socks)) {
+			errno = EBUSY;
+			return -1;
+		}
+	}
+
+	STAILQ_FOREACH_SAFE(group_impl, &(*group)->group_impls, link, tmp) {
+		rc = group_impl->net_impl->group_impl_close(group_impl);
+		if (rc != 0) {
+			SPDK_ERRLOG("group_impl_close for net(%s) failed\n",
+				    group_impl->net_impl->name);
+		}
+		free(group_impl);
+	}
+
+	free(*group);
+	*group = NULL;
+
+	return 0;
+}
+
+void
+spdk_net_impl_register(struct spdk_net_impl *impl)
+{
+	if (!strcmp("posix", impl->name)) {
+		STAILQ_INSERT_TAIL(&g_net_impls, impl, link);
+	} else {
+		STAILQ_INSERT_HEAD(&g_net_impls, impl, link);
+	}
+}