Linux-RDMA Archive on lore.kernel.org
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From: Jack Wang <jinpuwang@gmail.com>
To: linux-block@vger.kernel.org, linux-rdma@vger.kernel.org
Cc: axboe@kernel.dk, hch@infradead.org, sagi@grimberg.me,
	bvanassche@acm.org, leon@kernel.org, dledford@redhat.com,
	danil.kipnis@cloud.ionos.com, jinpu.wang@cloud.ionos.com,
	rpenyaev@suse.de
Subject: [PATCH v6 12/25] rtrs: server: sysfs interface functions
Date: Mon, 30 Dec 2019 11:29:29 +0100
Message-ID: <20191230102942.18395-13-jinpuwang@gmail.com> (raw)
In-Reply-To: <20191230102942.18395-1-jinpuwang@gmail.com>

From: Jack Wang <jinpu.wang@cloud.ionos.com>

This is the sysfs interface to rtrs sessions on server side:

  /sys/devices/virtual/rtrs-server/<SESS-NAME>/
    *** rtrs session accepted from a client peer
    |
    |- paths/<SRC@DST>/
       *** 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: Danil Kipnis <danil.kipnis@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
---
 drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c | 297 +++++++++++++++++++
 1 file changed, 297 insertions(+)
 create mode 100644 drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
new file mode 100644
index 000000000000..f5fb80f2a513
--- /dev/null
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
@@ -0,0 +1,297 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * InfiniBand Transport Layer
+ *
+ * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
+ *
+ * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
+ *
+ * Copyright (c) 2019 1&1 IONOS SE. All rights reserved.
+ */
+#undef pr_fmt
+#define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt
+
+#include "rtrs-pri.h"
+#include "rtrs-srv.h"
+#include "rtrs-log.h"
+
+static struct kobj_type ktype = {
+	.sysfs_ops	= &kobj_sysfs_ops,
+};
+
+static ssize_t rtrs_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 rtrs_srv_disconnect_store(struct kobject *kobj,
+					  struct kobj_attribute *attr,
+					  const char *buf, size_t count)
+{
+	struct rtrs_srv_sess *sess;
+	struct rtrs_sess *s;
+	char str[MAXHOSTNAMELEN];
+
+	sess = container_of(kobj, struct rtrs_srv_sess, kobj);
+	s = &sess->s;
+	if (!sysfs_streq(buf, "1")) {
+		rtrs_err(s, "%s: invalid value: '%s'\n",
+			  attr->attr.name, buf);
+		return -EINVAL;
+	}
+
+	sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, str, sizeof(str));
+
+	rtrs_info(s, "disconnect for path %s requested\n", str);
+	close_sess(sess);
+
+	return count;
+}
+
+static struct kobj_attribute rtrs_srv_disconnect_attr =
+	__ATTR(disconnect, 0644,
+	       rtrs_srv_disconnect_show, rtrs_srv_disconnect_store);
+
+static ssize_t rtrs_srv_hca_port_show(struct kobject *kobj,
+				       struct kobj_attribute *attr,
+				       char *page)
+{
+	struct rtrs_srv_sess *sess;
+	struct rtrs_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 rtrs_srv_hca_port_attr =
+	__ATTR(hca_port, 0444, rtrs_srv_hca_port_show, NULL);
+
+static ssize_t rtrs_srv_hca_name_show(struct kobject *kobj,
+				       struct kobj_attribute *attr,
+				       char *page)
+{
+	struct rtrs_srv_sess *sess;
+
+	sess = container_of(kobj, struct rtrs_srv_sess, kobj);
+
+	return scnprintf(page, PAGE_SIZE, "%s\n",
+			 sess->s.dev->ib_dev->name);
+}
+
+static struct kobj_attribute rtrs_srv_hca_name_attr =
+	__ATTR(hca_name, 0444, rtrs_srv_hca_name_show, NULL);
+
+static ssize_t rtrs_srv_src_addr_show(struct kobject *kobj,
+				       struct kobj_attribute *attr,
+				       char *page)
+{
+	struct rtrs_srv_sess *sess;
+	int cnt;
+
+	sess = container_of(kobj, struct rtrs_srv_sess, kobj);
+	cnt = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr,
+			      page, PAGE_SIZE);
+	return cnt + scnprintf(page + cnt, PAGE_SIZE - cnt, "\n");
+}
+
+static struct kobj_attribute rtrs_srv_src_addr_attr =
+	__ATTR(src_addr, 0444, rtrs_srv_src_addr_show, NULL);
+
+static ssize_t rtrs_srv_dst_addr_show(struct kobject *kobj,
+				       struct kobj_attribute *attr,
+				       char *page)
+{
+	struct rtrs_srv_sess *sess;
+	int cnt;
+
+	sess = container_of(kobj, struct rtrs_srv_sess, kobj);
+	cnt = sockaddr_to_str((struct sockaddr *)&sess->s.src_addr,
+			      page, PAGE_SIZE);
+	return cnt + scnprintf(page + cnt, PAGE_SIZE - cnt, "\n");
+}
+
+static struct kobj_attribute rtrs_srv_dst_addr_attr =
+	__ATTR(dst_addr, 0444, rtrs_srv_dst_addr_show, NULL);
+
+static struct attribute *rtrs_srv_sess_attrs[] = {
+	&rtrs_srv_hca_name_attr.attr,
+	&rtrs_srv_hca_port_attr.attr,
+	&rtrs_srv_src_addr_attr.attr,
+	&rtrs_srv_dst_addr_attr.attr,
+	&rtrs_srv_disconnect_attr.attr,
+	NULL,
+};
+
+static struct attribute_group rtrs_srv_sess_attr_group = {
+	.attrs = rtrs_srv_sess_attrs,
+};
+
+STAT_ATTR(struct rtrs_srv_sess, rdma,
+	  rtrs_srv_stats_rdma_to_str,
+	  rtrs_srv_reset_rdma_stats);
+
+STAT_ATTR(struct rtrs_srv_sess, wc_completion,
+	  rtrs_srv_stats_wc_completion_to_str,
+	  rtrs_srv_reset_wc_completion_stats);
+
+STAT_ATTR(struct rtrs_srv_sess, reset_all,
+	  rtrs_srv_reset_all_help,
+	  rtrs_srv_reset_all_stats);
+
+static struct attribute *rtrs_srv_stats_attrs[] = {
+	&rdma_attr.attr,
+	&wc_completion_attr.attr,
+	&reset_all_attr.attr,
+	NULL,
+};
+
+static struct attribute_group rtrs_srv_stats_attr_group = {
+	.attrs = rtrs_srv_stats_attrs,
+};
+
+static void rtrs_srv_dev_release(struct device *dev)
+{
+	struct rtrs_srv *srv = container_of(dev, struct rtrs_srv, dev);
+
+	kfree(srv);
+}
+
+static int rtrs_srv_create_once_sysfs_root_folders(struct rtrs_srv_sess *sess)
+{
+	struct rtrs_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 = rtrs_dev_class;
+	srv->dev.release = rtrs_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
+rtrs_srv_destroy_once_sysfs_root_folders(struct rtrs_srv_sess *sess)
+{
+	struct rtrs_srv *srv = sess->srv;
+
+	mutex_lock(&srv->paths_mutex);
+	if (!--srv->dev_ref) {
+		kobject_del(&srv->kobj_paths);
+		kobject_put(&srv->kobj_paths);
+		device_unregister(&srv->dev);
+	}
+	mutex_unlock(&srv->paths_mutex);
+}
+
+static int rtrs_srv_create_stats_files(struct rtrs_srv_sess *sess)
+{
+	int err;
+	struct rtrs_sess *s = &sess->s;
+
+	err = kobject_init_and_add(&sess->kobj_stats, &ktype,
+				   &sess->kobj, "stats");
+	if (unlikely(err)) {
+		rtrs_err(s, "kobject_init_and_add(): %d\n", err);
+		return err;
+	}
+	err = sysfs_create_group(&sess->kobj_stats,
+				 &rtrs_srv_stats_attr_group);
+	if (unlikely(err)) {
+		rtrs_err(s, "sysfs_create_group(): %d\n", err);
+		goto err;
+	}
+
+	return 0;
+
+err:
+	kobject_del(&sess->kobj_stats);
+	kobject_put(&sess->kobj_stats);
+
+	return err;
+}
+
+int rtrs_srv_create_sess_files(struct rtrs_srv_sess *sess)
+{
+	struct rtrs_srv *srv = sess->srv;
+	struct rtrs_sess *s = &sess->s;
+	char str[NAME_MAX];
+	int err, cnt;
+
+	cnt = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr,
+			      str, sizeof(str));
+	cnt += scnprintf(str + cnt, sizeof(str) - cnt, "@");
+	sockaddr_to_str((struct sockaddr *)&sess->s.src_addr,
+			str + cnt, sizeof(str) - cnt);
+
+	err = rtrs_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)) {
+		rtrs_err(s, "kobject_init_and_add(): %d\n", err);
+		goto destroy_root;
+	}
+	err = sysfs_create_group(&sess->kobj, &rtrs_srv_sess_attr_group);
+	if (unlikely(err)) {
+		rtrs_err(s, "sysfs_create_group(): %d\n", err);
+		goto put_kobj;
+	}
+	err = rtrs_srv_create_stats_files(sess);
+	if (unlikely(err))
+		goto remove_group;
+
+	return 0;
+
+remove_group:
+	sysfs_remove_group(&sess->kobj, &rtrs_srv_sess_attr_group);
+put_kobj:
+	kobject_del(&sess->kobj);
+	kobject_put(&sess->kobj);
+destroy_root:
+	rtrs_srv_destroy_once_sysfs_root_folders(sess);
+
+	return err;
+}
+
+void rtrs_srv_destroy_sess_files(struct rtrs_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);
+
+		rtrs_srv_destroy_once_sysfs_root_folders(sess);
+	}
+}
-- 
2.17.1


  parent reply index

Thread overview: 89+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-30 10:29 [PATCH v6 00/25] RTRS (former IBTRS) rdma transport library and RNBD (former IBNBD) rdma network block device Jack Wang
2019-12-30 10:29 ` [PATCH v6 01/25] sysfs: export sysfs_remove_file_self() Jack Wang
2019-12-30 10:29 ` [PATCH v6 02/25] rtrs: public interface header to establish RDMA connections Jack Wang
2019-12-30 19:25   ` Bart Van Assche
2020-01-02 13:35     ` Jinpu Wang
2020-01-02 16:36       ` Bart Van Assche
2020-01-02 16:47         ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 03/25] rtrs: private headers with rtrs protocol structs and helpers Jack Wang
2019-12-30 19:48   ` Bart Van Assche
2020-01-02 15:27     ` Jinpu Wang
2020-01-02 17:00       ` Bart Van Assche
2020-01-02 18:26         ` Jason Gunthorpe
2020-01-03 12:31           ` Jinpu Wang
2020-01-03 12:27         ` Jinpu Wang
2019-12-31  0:07   ` Bart Van Assche
2020-01-03 13:48     ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 04/25] rtrs: core: lib functions shared between client and server modules Jack Wang
2019-12-30 22:25   ` Bart Van Assche
2020-01-07 12:22     ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 05/25] rtrs: client: private header with client structs and functions Jack Wang
2019-12-30 22:51   ` Bart Van Assche
2020-01-07 12:39     ` Jinpu Wang
2019-12-30 23:03   ` Bart Van Assche
2020-01-07 12:39     ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 06/25] rtrs: client: main functionality Jack Wang
2019-12-30 23:53   ` Bart Van Assche
2020-01-02 18:23     ` Jason Gunthorpe
2020-01-03 14:30     ` Jinpu Wang
2020-01-03 16:12       ` Bart Van Assche
2019-12-30 10:29 ` [PATCH v6 07/25] rtrs: client: statistics functions Jack Wang
2020-01-02 21:07   ` Bart Van Assche
2020-01-03 14:39     ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 08/25] rtrs: client: sysfs interface functions Jack Wang
2020-01-02 21:14   ` Bart Van Assche
2020-01-03 14:59     ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 09/25] rtrs: server: private header with server structs and functions Jack Wang
2020-01-02 21:24   ` Bart Van Assche
2020-01-08 16:33     ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 10/25] rtrs: server: main functionality Jack Wang
2020-01-02 22:03   ` Bart Van Assche
2020-01-07 13:19     ` Jinpu Wang
2020-01-07 18:25       ` Jason Gunthorpe
2020-01-10 17:38         ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 11/25] rtrs: server: statistics functions Jack Wang
2020-01-02 22:02   ` Bart Van Assche
2020-01-08 12:55     ` Jinpu Wang
2019-12-30 10:29 ` Jack Wang [this message]
2020-01-02 22:06   ` [PATCH v6 12/25] rtrs: server: sysfs interface functions Bart Van Assche
2020-01-07 14:40     ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 13/25] rtrs: include client and server modules into kernel compilation Jack Wang
2020-01-02 22:11   ` Bart Van Assche
2020-01-03 16:19     ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 14/25] rtrs: a bit of documentation Jack Wang
2019-12-30 23:19   ` Bart Van Assche
2020-01-07 14:48     ` Jinpu Wang
2020-01-02 22:21   ` Bart Van Assche
2020-01-07 15:49     ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 15/25] rnbd: private headers with rnbd protocol structs and helpers Jack Wang
2020-01-02 22:34   ` Bart Van Assche
2020-01-07 16:53     ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 16/25] rnbd: client: private header with client structs and functions Jack Wang
2020-01-02 22:37   ` Bart Van Assche
2020-01-07 17:09     ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 17/25] rnbd: client: main functionality Jack Wang
2020-01-02 23:55   ` Bart Van Assche
2020-01-08 14:22     ` Jinpu Wang
2020-01-10 14:45     ` Jinpu Wang
2020-01-10 15:09       ` Roman Penyaev
2020-01-10 15:29         ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 18/25] rnbd: client: sysfs interface functions Jack Wang
2020-01-03  0:03   ` Bart Van Assche
2020-01-08 13:06     ` Jinpu Wang
2020-01-08 16:39       ` Bart Van Assche
2020-01-08 16:51         ` Jinpu Wang
2019-12-30 10:29 ` [PATCH v6 19/25] rnbd: server: private header with server structs and functions Jack Wang
2019-12-30 10:29 ` [PATCH v6 20/25] rnbd: server: main functionality Jack Wang
2019-12-30 10:29 ` [PATCH v6 21/25] rnbd: server: functionality for IO submission to file or block dev Jack Wang
2019-12-30 10:29 ` [PATCH v6 22/25] rnbd: server: sysfs interface functions Jack Wang
2019-12-30 10:29 ` [PATCH v6 23/25] rnbd: include client and server modules into kernel compilation Jack Wang
2019-12-30 10:29 ` [PATCH v6 24/25] rnbd: a bit of documentation Jack Wang
2019-12-30 10:29 ` [PATCH v6 25/25] MAINTAINERS: Add maintainers for RNBD/RTRS modules Jack Wang
2019-12-30 12:22   ` Gal Pressman
2020-01-02  8:41     ` Jinpu Wang
2019-12-31  0:11 ` [PATCH v6 00/25] RTRS (former IBTRS) rdma transport library and RNBD (former IBNBD) rdma network block device Bart Van Assche
2020-01-02  8:48   ` Jinpu Wang
2019-12-31  2:39 ` Bart Van Assche
2020-01-02  9:20   ` Jinpu Wang
2020-01-02 18:28   ` Jason Gunthorpe
2020-01-03 12:34     ` Jinpu Wang

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