new file mode 100644
@@ -0,0 +1,271 @@
+/*
+ * InfiniBand Transport Layer
+ *
+ * Copyright (c) 2014 - 2017 ProfitBricks GmbH. All rights reserved.
+ * Authors: Fabian Holler <mail@fholler.de>
+ * Jack Wang <jinpu.wang@profitbricks.com>
+ * Kleber Souza <kleber.souza@profitbricks.com>
+ * Danil Kipnis <danil.kipnis@profitbricks.com>
+ * Roman Penyaev <roman.penyaev@profitbricks.com>
+ * Milind Dumbare <Milind.dumbare@gmail.com>
+ *
+ * Copyright (c) 2017 - 2018 ProfitBricks GmbH. All rights reserved.
+ * Authors: Danil Kipnis <danil.kipnis@profitbricks.com>
+ * Roman Penyaev <roman.penyaev@profitbricks.com>
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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/>.
+ */
+
+#undef pr_fmt
+#define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt
+
+#include "ibtrs-pri.h"
+#include "ibtrs-srv.h"
+#include "ibtrs-log.h"
+
+extern struct class *ibtrs_dev_class;
+
+static struct kobj_type ktype = {
+ .sysfs_ops = &kobj_sysfs_ops,
+};
+
+static ssize_t ibtrs_srv_disconnect_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *page)
+{
+ return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n",
+ attr->attr.name);
+}
+
+static ssize_t ibtrs_srv_disconnect_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ibtrs_srv_sess *sess;
+ char str[MAXHOSTNAMELEN];
+
+ sess = container_of(kobj, struct ibtrs_srv_sess, kobj);
+ if (!sysfs_streq(buf, "1")) {
+ ibtrs_err(sess, "%s: invalid value: '%s'\n",
+ attr->attr.name, buf);
+ return -EINVAL;
+ }
+
+ sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, str, sizeof(str));
+
+ ibtrs_info(sess, "disconnect for path %s requested\n", str);
+ ibtrs_srv_queue_close(sess);
+
+ return count;
+}
+
+static struct kobj_attribute ibtrs_srv_disconnect_attr =
+ __ATTR(disconnect, 0644,
+ ibtrs_srv_disconnect_show, ibtrs_srv_disconnect_store);
+
+static ssize_t ibtrs_srv_hca_port_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *page)
+{
+ struct ibtrs_srv_sess *sess;
+ struct ibtrs_con *usr_con;
+
+ sess = container_of(kobj, typeof(*sess), kobj);
+ usr_con = sess->s.con[0];
+
+ return scnprintf(page, PAGE_SIZE, "%u\n",
+ usr_con->cm_id->port_num);
+}
+
+static struct kobj_attribute ibtrs_srv_hca_port_attr =
+ __ATTR(hca_port, 0444, ibtrs_srv_hca_port_show, NULL);
+
+static ssize_t ibtrs_srv_hca_name_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *page)
+{
+ struct ibtrs_srv_sess *sess;
+
+ sess = container_of(kobj, struct ibtrs_srv_sess, kobj);
+
+ return scnprintf(page, PAGE_SIZE, "%s\n",
+ sess->s.dev->ib_dev->name);
+}
+
+static struct kobj_attribute ibtrs_srv_hca_name_attr =
+ __ATTR(hca_name, 0444, ibtrs_srv_hca_name_show, NULL);
+
+static struct attribute *ibtrs_srv_sess_attrs[] = {
+ &ibtrs_srv_hca_name_attr.attr,
+ &ibtrs_srv_hca_port_attr.attr,
+ &ibtrs_srv_disconnect_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ibtrs_srv_sess_attr_group = {
+ .attrs = ibtrs_srv_sess_attrs,
+};
+
+STAT_ATTR(struct ibtrs_srv_sess, rdma,
+ ibtrs_srv_stats_rdma_to_str,
+ ibtrs_srv_reset_rdma_stats);
+
+STAT_ATTR(struct ibtrs_srv_sess, wc_completion,
+ ibtrs_srv_stats_wc_completion_to_str,
+ ibtrs_srv_reset_wc_completion_stats);
+
+STAT_ATTR(struct ibtrs_srv_sess, reset_all,
+ ibtrs_srv_reset_all_help,
+ ibtrs_srv_reset_all_stats);
+
+static struct attribute *ibtrs_srv_stats_attrs[] = {
+ &rdma_attr.attr,
+ &wc_completion_attr.attr,
+ &reset_all_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ibtrs_srv_stats_attr_group = {
+ .attrs = ibtrs_srv_stats_attrs,
+};
+
+static void ibtrs_srv_dev_release(struct device *dev)
+{
+ /* Nobody plays with device references, so nop */
+}
+
+static int ibtrs_srv_create_once_sysfs_root_folders(struct ibtrs_srv_sess *sess)
+{
+ struct ibtrs_srv *srv = sess->srv;
+ int err = 0;
+
+ mutex_lock(&srv->paths_mutex);
+ if (srv->dev_ref++) {
+ /*
+ * Just increase device reference. We can't use get_device()
+ * because we need to unregister device when ref goes to 0,
+ * not just to put it.
+ */
+ goto unlock;
+ }
+ srv->dev.class = ibtrs_dev_class;
+ srv->dev.release = ibtrs_srv_dev_release;
+ dev_set_name(&srv->dev, "%s", sess->s.sessname);
+
+ err = device_register(&srv->dev);
+ if (unlikely(err)) {
+ pr_err("device_register(): %d\n", err);
+ goto unlock;
+ }
+ err = kobject_init_and_add(&srv->kobj_paths, &ktype,
+ &srv->dev.kobj, "paths");
+ if (unlikely(err)) {
+ pr_err("kobject_init_and_add(): %d\n", err);
+ device_unregister(&srv->dev);
+ goto unlock;
+ }
+unlock:
+ mutex_unlock(&srv->paths_mutex);
+
+ return err;
+}
+
+static void ibtrs_srv_destroy_once_sysfs_root_folders(struct ibtrs_srv_sess *sess)
+{
+ struct ibtrs_srv *srv = sess->srv;
+
+ mutex_lock(&srv->paths_mutex);
+ if (!--srv->dev_ref) {
+ kobject_put(&srv->kobj_paths);
+ device_unregister(&srv->dev);
+ }
+ mutex_unlock(&srv->paths_mutex);
+}
+
+static int ibtrs_srv_create_stats_files(struct ibtrs_srv_sess *sess)
+{
+ int err;
+
+ err = kobject_init_and_add(&sess->kobj_stats, &ktype,
+ &sess->kobj, "stats");
+ if (unlikely(err)) {
+ ibtrs_err(sess, "kobject_init_and_add(): %d\n", err);
+ return err;
+ }
+ err = sysfs_create_group(&sess->kobj_stats,
+ &ibtrs_srv_stats_attr_group);
+ if (unlikely(err)) {
+ ibtrs_err(sess, "sysfs_create_group(): %d\n", err);
+ goto err;
+ }
+
+ return 0;
+
+err:
+ kobject_put(&sess->kobj_stats);
+
+ return err;
+}
+
+int ibtrs_srv_create_sess_files(struct ibtrs_srv_sess *sess)
+{
+ struct ibtrs_srv *srv = sess->srv;
+ char str[MAXHOSTNAMELEN];
+ int err;
+
+ sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, str, sizeof(str));
+
+ err = ibtrs_srv_create_once_sysfs_root_folders(sess);
+ if (unlikely(err))
+ return err;
+
+ err = kobject_init_and_add(&sess->kobj, &ktype, &srv->kobj_paths,
+ "%s", str);
+ if (unlikely(err)) {
+ ibtrs_err(sess, "kobject_init_and_add(): %d\n", err);
+ goto destroy_root;
+ }
+ err = sysfs_create_group(&sess->kobj, &ibtrs_srv_sess_attr_group);
+ if (unlikely(err)) {
+ ibtrs_err(sess, "sysfs_create_group(): %d\n", err);
+ goto put_kobj;
+ }
+ err = ibtrs_srv_create_stats_files(sess);
+ if (unlikely(err))
+ goto remove_group;
+
+ return 0;
+
+remove_group:
+ sysfs_remove_group(&sess->kobj, &ibtrs_srv_sess_attr_group);
+put_kobj:
+ kobject_del(&sess->kobj);
+ kobject_put(&sess->kobj);
+destroy_root:
+ ibtrs_srv_destroy_once_sysfs_root_folders(sess);
+
+ return err;
+}
+
+void ibtrs_srv_destroy_sess_files(struct ibtrs_srv_sess *sess)
+{
+ if (sess->kobj.state_in_sysfs) {
+ kobject_del(&sess->kobj_stats);
+ kobject_put(&sess->kobj_stats);
+ kobject_del(&sess->kobj);
+ kobject_put(&sess->kobj);
+
+ ibtrs_srv_destroy_once_sysfs_root_folders(sess);
+ }
+}
This is the sysfs interface to IBTRS sessions on server side: /sys/devices/virtual/ibtrs-server/<SESS-NAME>/ *** IBTRS session accepted from a client peer | |- paths/<SOURCE-IP>/ *** established paths from a client in a session | |- disconnect | *** disconnect path | |- hca_name | *** HCA name | |- hca_port | *** HCA port | |- stats/ *** current path statistics | |- rdma |- reset_all |- wc_completions Signed-off-by: Roman Pen <roman.penyaev@profitbricks.com> Signed-off-by: Danil Kipnis <danil.kipnis@profitbricks.com> Cc: Jack Wang <jinpu.wang@profitbricks.com> --- drivers/infiniband/ulp/ibtrs/ibtrs-srv-sysfs.c | 271 +++++++++++++++++++++++++ 1 file changed, 271 insertions(+) create mode 100644 drivers/infiniband/ulp/ibtrs/ibtrs-srv-sysfs.c