--- /dev/null
+/*
+ * Copyright (c) 2008, 2009, 2010, 2012, 2013, 2014 Nicira, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <config.h>
+#include "stream-fd.h"
+#include <errno.h>
+#include <poll.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "fatal-signal.h"
+#include "poll-loop.h"
+#include "socket-util.h"
+#include "util.h"
+#include "stream-provider.h"
+#include "stream.h"
+#include "vlog.h"
+
+VLOG_DEFINE_THIS_MODULE(stream_fd);
+
+/* Active file descriptor stream. */
+
+struct stream_fd
+{
+ struct stream stream;
+ int fd;
+};
+
+static const struct stream_class stream_fd_class;
+
+static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 25);
+
+static void maybe_unlink_and_free(char *path);
+
+/* Creates a new stream named 'name' that will send and receive data on 'fd'
+ * and stores a pointer to the stream in '*streamp'. Initial connection status
+ * 'connect_status' is interpreted as described for stream_init().
+ *
+ * Returns 0 if successful, otherwise a positive errno value. (The current
+ * implementation never fails.) */
+int
+new_fd_stream(const char *name, int fd, int connect_status,
+ struct stream **streamp)
+{
+ struct stream_fd *s;
+
+ s = xmalloc(sizeof *s);
+ stream_init(&s->stream, &stream_fd_class, connect_status, name);
+ s->fd = fd;
+ *streamp = &s->stream;
+ return 0;
+}
+
+static struct stream_fd *
+stream_fd_cast(struct stream *stream)
+{
+ stream_assert_class(stream, &stream_fd_class);
+ return CONTAINER_OF(stream, struct stream_fd, stream);
+}
+
+static void
+fd_close(struct stream *stream)
+{
+ struct stream_fd *s = stream_fd_cast(stream);
+ close(s->fd);
+ free(s);
+}
+
+static int
+fd_connect(struct stream *stream)
+{
+ struct stream_fd *s = stream_fd_cast(stream);
+ return check_connection_completion(s->fd);
+}
+
+static ssize_t
+fd_recv(struct stream *stream, void *buffer, size_t n)
+{
+ struct stream_fd *s = stream_fd_cast(stream);
+ ssize_t retval;
+
+ retval = read(s->fd, buffer, n);
+ return retval >= 0 ? retval : -errno;
+}
+
+static ssize_t
+fd_send(struct stream *stream, const void *buffer, size_t n)
+{
+ struct stream_fd *s = stream_fd_cast(stream);
+ ssize_t retval;
+
+ retval = write(s->fd, buffer, n);
+ return (retval > 0 ? retval
+ : retval == 0 ? -EAGAIN
+ : -errno);
+}
+
+static void
+fd_wait(struct stream *stream, enum stream_wait_type wait)
+{
+ struct stream_fd *s = stream_fd_cast(stream);
+ switch (wait) {
+ case STREAM_CONNECT:
+ case STREAM_SEND:
+ poll_fd_wait(s->fd, POLLOUT);
+ break;
+
+ case STREAM_RECV:
+ poll_fd_wait(s->fd, POLLIN);
+ break;
+
+ default:
+ OVS_NOT_REACHED();
+ }
+}
+
+static const struct stream_class stream_fd_class = {
+ "fd", /* name */
+ false, /* needs_probes */
+ NULL, /* open */
+ fd_close, /* close */
+ fd_connect, /* connect */
+ fd_recv, /* recv */
+ fd_send, /* send */
+ NULL, /* run */
+ NULL, /* run_wait */
+ fd_wait, /* wait */
+};
+\f
+/* Passive file descriptor stream. */
+
+struct fd_pstream
+{
+ struct pstream pstream;
+ int fd;
+ int (*accept_cb)(int fd, const struct sockaddr_storage *, size_t ss_len,
+ struct stream **);
+ int (*set_dscp_cb)(int fd, uint8_t dscp);
+ char *unlink_path;
+};
+
+static const struct pstream_class fd_pstream_class;
+
+static struct fd_pstream *
+fd_pstream_cast(struct pstream *pstream)
+{
+ pstream_assert_class(pstream, &fd_pstream_class);
+ return CONTAINER_OF(pstream, struct fd_pstream, pstream);
+}
+
+/* Creates a new pstream named 'name' that will accept new socket connections
+ * on 'fd' and stores a pointer to the stream in '*pstreamp'.
+ *
+ * When a connection has been accepted, 'accept_cb' will be called with the new
+ * socket fd 'fd' and the remote address of the connection 'sa' and 'sa_len'.
+ * accept_cb must return 0 if the connection is successful, in which case it
+ * must initialize '*streamp' to the new stream, or a positive errno value on
+ * error. In either case accept_cb takes ownership of the 'fd' passed in.
+ *
+ * When '*pstreamp' is closed, then 'unlink_path' (if nonnull) will be passed
+ * to fatal_signal_unlink_file_now() and freed with free().
+ *
+ * Returns 0 if successful, otherwise a positive errno value. (The current
+ * implementation never fails.) */
+int
+new_fd_pstream(const char *name, int fd,
+ int (*accept_cb)(int fd, const struct sockaddr_storage *ss,
+ size_t ss_len, struct stream **streamp),
+ int (*set_dscp_cb)(int fd, uint8_t dscp),
+ char *unlink_path, struct pstream **pstreamp)
+{
+ struct fd_pstream *ps = xmalloc(sizeof *ps);
+ pstream_init(&ps->pstream, &fd_pstream_class, name);
+ ps->fd = fd;
+ ps->accept_cb = accept_cb;
+ ps->set_dscp_cb = set_dscp_cb;
+ ps->unlink_path = unlink_path;
+ *pstreamp = &ps->pstream;
+ return 0;
+}
+
+static void
+pfd_close(struct pstream *pstream)
+{
+ struct fd_pstream *ps = fd_pstream_cast(pstream);
+ close(ps->fd);
+ maybe_unlink_and_free(ps->unlink_path);
+ free(ps);
+}
+
+static int
+pfd_accept(struct pstream *pstream, struct stream **new_streamp)
+{
+ struct fd_pstream *ps = fd_pstream_cast(pstream);
+ struct sockaddr_storage ss;
+ socklen_t ss_len = sizeof ss;
+ int new_fd;
+ int retval;
+
+ new_fd = accept(ps->fd, (struct sockaddr *) &ss, &ss_len);
+ if (new_fd < 0) {
+ retval = errno;
+ if (retval != EAGAIN) {
+ VLOG_DBG_RL(&rl, "accept: %s", ovs_strerror(retval));
+ }
+ return retval;
+ }
+
+ retval = set_nonblocking(new_fd);
+ if (retval) {
+ close(new_fd);
+ return retval;
+ }
+
+ return ps->accept_cb(new_fd, &ss, ss_len, new_streamp);
+}
+
+static void
+pfd_wait(struct pstream *pstream)
+{
+ struct fd_pstream *ps = fd_pstream_cast(pstream);
+ poll_fd_wait(ps->fd, POLLIN);
+}
+
+static int
+pfd_set_dscp(struct pstream *pstream, uint8_t dscp)
+{
+ struct fd_pstream *ps = fd_pstream_cast(pstream);
+ if (ps->set_dscp_cb) {
+ return ps->set_dscp_cb(ps->fd, dscp);
+ }
+ return 0;
+}
+
+static const struct pstream_class fd_pstream_class = {
+ "pstream",
+ false,
+ NULL,
+ pfd_close,
+ pfd_accept,
+ pfd_wait,
+ pfd_set_dscp,
+};
+\f
+/* Helper functions. */
+static void
+maybe_unlink_and_free(char *path)
+{
+ if (path) {
+ fatal_signal_unlink_file_now(path);
+ free(path);
+ }
+}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff