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-rw-r--r--xlators/protocol/lib/src/transport.c422
1 files changed, 422 insertions, 0 deletions
diff --git a/xlators/protocol/lib/src/transport.c b/xlators/protocol/lib/src/transport.c
new file mode 100644
index 00000000000..d460d02096e
--- /dev/null
+++ b/xlators/protocol/lib/src/transport.c
@@ -0,0 +1,422 @@
+/*
+ Copyright (c) 2006-2009 Gluster, Inc. <http://www.gluster.com>
+ This file is part of GlusterFS.
+
+ GlusterFS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3 of the License,
+ or (at your option) any later version.
+
+ GlusterFS is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+#include <dlfcn.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/poll.h>
+#include <fnmatch.h>
+#include <stdint.h>
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "logging.h"
+#include "transport.h"
+#include "glusterfs.h"
+#include "xlator.h"
+#include "list.h"
+
+
+transport_t *
+transport_load (dict_t *options,
+ xlator_t *xl)
+{
+ struct transport *trans = NULL, *return_trans = NULL;
+ char *name = NULL;
+ void *handle = NULL;
+ char *type = NULL;
+ char str[] = "ERROR";
+ int32_t ret = -1;
+ int8_t is_tcp = 0, is_unix = 0, is_ibsdp = 0;
+ volume_opt_list_t *vol_opt = NULL;
+
+ GF_VALIDATE_OR_GOTO("transport", options, fail);
+ GF_VALIDATE_OR_GOTO("transport", xl, fail);
+
+ trans = GF_CALLOC (1, sizeof (struct transport),
+ gf_common_mt_transport);
+ GF_VALIDATE_OR_GOTO("transport", trans, fail);
+
+ trans->xl = xl;
+ type = str;
+
+ /* Backward compatibility */
+ ret = dict_get_str (options, "transport-type", &type);
+ if (ret < 0) {
+ ret = dict_set_str (options, "transport-type", "socket");
+ if (ret < 0)
+ gf_log ("dict", GF_LOG_DEBUG,
+ "setting transport-type failed");
+ gf_log ("transport", GF_LOG_WARNING,
+ "missing 'option transport-type'. defaulting to "
+ "\"socket\"");
+ } else {
+ {
+ /* Backword compatibility to handle * /client,
+ * * /server.
+ */
+ char *tmp = strchr (type, '/');
+ if (tmp)
+ *tmp = '\0';
+ }
+
+ is_tcp = strcmp (type, "tcp");
+ is_unix = strcmp (type, "unix");
+ is_ibsdp = strcmp (type, "ib-sdp");
+ if ((is_tcp == 0) ||
+ (is_unix == 0) ||
+ (is_ibsdp == 0)) {
+ if (is_unix == 0)
+ ret = dict_set_str (options,
+ "transport.address-family",
+ "unix");
+ if (is_ibsdp == 0)
+ ret = dict_set_str (options,
+ "transport.address-family",
+ "inet-sdp");
+
+ if (ret < 0)
+ gf_log ("dict", GF_LOG_DEBUG,
+ "setting address-family failed");
+
+ ret = dict_set_str (options,
+ "transport-type", "socket");
+ if (ret < 0)
+ gf_log ("dict", GF_LOG_DEBUG,
+ "setting transport-type failed");
+ }
+ }
+
+ ret = dict_get_str (options, "transport-type", &type);
+ if (ret < 0) {
+ GF_FREE (trans);
+ gf_log ("transport", GF_LOG_ERROR,
+ "'option transport-type <xx>' missing in volume '%s'",
+ xl->name);
+ goto fail;
+ }
+
+ ret = gf_asprintf (&name, "%s/%s.so", TRANSPORTDIR, type);
+ if (-1 == ret) {
+ gf_log ("transport", GF_LOG_ERROR, "asprintf failed");
+ goto fail;
+ }
+ gf_log ("transport", GF_LOG_DEBUG,
+ "attempt to load file %s", name);
+
+ handle = dlopen (name, RTLD_NOW|RTLD_GLOBAL);
+ if (handle == NULL) {
+ gf_log ("transport", GF_LOG_ERROR, "%s", dlerror ());
+ gf_log ("transport", GF_LOG_ERROR,
+ "volume '%s': transport-type '%s' is not valid or "
+ "not found on this machine",
+ xl->name, type);
+ GF_FREE (name);
+ GF_FREE (trans);
+ goto fail;
+ }
+ GF_FREE (name);
+
+ trans->ops = dlsym (handle, "tops");
+ if (trans->ops == NULL) {
+ gf_log ("transport", GF_LOG_ERROR,
+ "dlsym (transport_ops) on %s", dlerror ());
+ GF_FREE (trans);
+ goto fail;
+ }
+
+ trans->init = dlsym (handle, "init");
+ if (trans->init == NULL) {
+ gf_log ("transport", GF_LOG_ERROR,
+ "dlsym (gf_transport_init) on %s", dlerror ());
+ GF_FREE (trans);
+ goto fail;
+ }
+
+ trans->fini = dlsym (handle, "fini");
+ if (trans->fini == NULL) {
+ gf_log ("transport", GF_LOG_ERROR,
+ "dlsym (gf_transport_fini) on %s", dlerror ());
+ GF_FREE (trans);
+ goto fail;
+ }
+
+ vol_opt = GF_CALLOC (1, sizeof (volume_opt_list_t),
+ gf_common_mt_volume_opt_list_t);
+ vol_opt->given_opt = dlsym (handle, "options");
+ if (vol_opt->given_opt == NULL) {
+ gf_log ("transport", GF_LOG_DEBUG,
+ "volume option validation not specified");
+ } else {
+ list_add_tail (&vol_opt->list, &xl->volume_options);
+ if (-1 ==
+ validate_xlator_volume_options (xl,
+ vol_opt->given_opt)) {
+ gf_log ("transport", GF_LOG_ERROR,
+ "volume option validation failed");
+ GF_FREE (trans);
+ goto fail;
+ }
+ }
+
+ ret = trans->init (trans);
+ if (ret != 0) {
+ gf_log ("transport", GF_LOG_ERROR,
+ "'%s' initialization failed", type);
+ GF_FREE (trans);
+ goto fail;
+ }
+
+ pthread_mutex_init (&trans->lock, NULL);
+ return_trans = trans;
+fail:
+ return return_trans;
+}
+
+
+int32_t
+transport_submit (transport_t *this, char *buf, int32_t len,
+ struct iovec *vector, int count,
+ struct iobref *iobref)
+{
+ int32_t ret = -1;
+ transport_t *peer_trans = NULL;
+ struct iobuf *iobuf = NULL;
+ struct transport_msg *msg = NULL;
+
+ if (this->peer_trans) {
+ peer_trans = this->peer_trans;
+
+ msg = GF_CALLOC (1, sizeof (*msg),
+ gf_common_mt_transport_msg);
+ if (!msg) {
+ return -ENOMEM;
+ }
+
+ msg->hdr = buf;
+ msg->hdrlen = len;
+
+ if (vector) {
+ iobuf = iobuf_get (this->xl->ctx->iobuf_pool);
+ if (!iobuf) {
+ GF_FREE (msg->hdr);
+ GF_FREE (msg);
+ return -ENOMEM;
+ }
+
+ iov_unload (iobuf->ptr, vector, count);
+ msg->iobuf = iobuf;
+ }
+
+ pthread_mutex_lock (&peer_trans->handover.mutex);
+ {
+ list_add_tail (&msg->list, &peer_trans->handover.msgs);
+ pthread_cond_broadcast (&peer_trans->handover.cond);
+ }
+ pthread_mutex_unlock (&peer_trans->handover.mutex);
+
+ return 0;
+ }
+
+ GF_VALIDATE_OR_GOTO("transport", this, fail);
+ GF_VALIDATE_OR_GOTO("transport", this->ops, fail);
+
+ ret = this->ops->submit (this, buf, len, vector, count, iobref);
+fail:
+ return ret;
+}
+
+
+int32_t
+transport_connect (transport_t *this)
+{
+ int ret = -1;
+
+ GF_VALIDATE_OR_GOTO("transport", this, fail);
+
+ ret = this->ops->connect (this);
+fail:
+ return ret;
+}
+
+
+int32_t
+transport_listen (transport_t *this)
+{
+ int ret = -1;
+
+ GF_VALIDATE_OR_GOTO("transport", this, fail);
+
+ ret = this->ops->listen (this);
+fail:
+ return ret;
+}
+
+
+int32_t
+transport_disconnect (transport_t *this)
+{
+ int32_t ret = -1;
+
+ GF_VALIDATE_OR_GOTO("transport", this, fail);
+
+ ret = this->ops->disconnect (this);
+fail:
+ return ret;
+}
+
+
+int32_t
+transport_destroy (transport_t *this)
+{
+ int32_t ret = -1;
+
+ GF_VALIDATE_OR_GOTO("transport", this, fail);
+
+ if (this->fini)
+ this->fini (this);
+
+ pthread_mutex_destroy (&this->lock);
+ GF_FREE (this);
+fail:
+ return ret;
+}
+
+
+transport_t *
+transport_ref (transport_t *this)
+{
+ transport_t *return_this = NULL;
+
+ GF_VALIDATE_OR_GOTO("transport", this, fail);
+
+ pthread_mutex_lock (&this->lock);
+ {
+ this->refcount ++;
+ }
+ pthread_mutex_unlock (&this->lock);
+
+ return_this = this;
+fail:
+ return return_this;
+}
+
+
+int32_t
+transport_receive (transport_t *this, char **hdr_p, size_t *hdrlen_p,
+ struct iobuf **iobuf_p)
+{
+ int32_t ret = -1;
+
+ GF_VALIDATE_OR_GOTO("transport", this, fail);
+
+ if (this->peer_trans) {
+ *hdr_p = this->handover.msg->hdr;
+ *hdrlen_p = this->handover.msg->hdrlen;
+ *iobuf_p = this->handover.msg->iobuf;
+
+ return 0;
+ }
+
+ ret = this->ops->receive (this, hdr_p, hdrlen_p, iobuf_p);
+fail:
+ return ret;
+}
+
+
+int32_t
+transport_unref (transport_t *this)
+{
+ int32_t refcount = 0;
+ int32_t ret = -1;
+
+ GF_VALIDATE_OR_GOTO("transport", this, fail);
+
+ pthread_mutex_lock (&this->lock);
+ {
+ refcount = --this->refcount;
+ }
+ pthread_mutex_unlock (&this->lock);
+
+ if (refcount == 0) {
+ xlator_notify (this->xl, GF_EVENT_TRANSPORT_CLEANUP, this);
+ transport_destroy (this);
+ }
+
+ ret = 0;
+fail:
+ return ret;
+}
+
+
+void *
+transport_peerproc (void *trans_data)
+{
+ transport_t *trans = NULL;
+ struct transport_msg *msg = NULL;
+
+ trans = trans_data;
+
+ while (1) {
+ pthread_mutex_lock (&trans->handover.mutex);
+ {
+ while (list_empty (&trans->handover.msgs))
+ pthread_cond_wait (&trans->handover.cond,
+ &trans->handover.mutex);
+
+ msg = list_entry (trans->handover.msgs.next,
+ struct transport_msg, list);
+
+ list_del_init (&msg->list);
+ }
+ pthread_mutex_unlock (&trans->handover.mutex);
+
+ trans->handover.msg = msg;
+
+ xlator_notify (trans->xl, GF_EVENT_POLLIN, trans);
+
+ GF_FREE (msg);
+ }
+}
+
+
+int
+transport_setpeer (transport_t *trans, transport_t *peer_trans)
+{
+ trans->peer_trans = transport_ref (peer_trans);
+
+ INIT_LIST_HEAD (&trans->handover.msgs);
+ pthread_cond_init (&trans->handover.cond, NULL);
+ pthread_mutex_init (&trans->handover.mutex, NULL);
+ pthread_create (&trans->handover.thread, NULL,
+ transport_peerproc, trans);
+
+ peer_trans->peer_trans = transport_ref (trans);
+
+ INIT_LIST_HEAD (&peer_trans->handover.msgs);
+ pthread_cond_init (&peer_trans->handover.cond, NULL);
+ pthread_mutex_init (&peer_trans->handover.mutex, NULL);
+ pthread_create (&peer_trans->handover.thread, NULL,
+ transport_peerproc, peer_trans);
+
+ return 0;
+}
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