From: Jack Wang <jinpu.w...@profitbricks.com>
Signed-off-by: Jack Wang <jinpu.w...@profitbricks.com>
Signed-off-by: Kleber Souza <kleber.so...@profitbricks.com>
Signed-off-by: Danil Kipnis <danil.kip...@profitbricks.com>
Signed-off-by: Roman Pen <roman.peny...@profitbricks.com>
---
drivers/block/ibnbd_server/ibnbd_srv_sysfs.c | 317 +++++++++++++++++++++++++++
drivers/block/ibnbd_server/ibnbd_srv_sysfs.h | 64 ++++++
2 files changed, 381 insertions(+)
create mode 100644 drivers/block/ibnbd_server/ibnbd_srv_sysfs.c
create mode 100644 drivers/block/ibnbd_server/ibnbd_srv_sysfs.h
diff --git a/drivers/block/ibnbd_server/ibnbd_srv_sysfs.c
b/drivers/block/ibnbd_server/ibnbd_srv_sysfs.c
new file mode 100644
index 0000000..8774abe
--- /dev/null
+++ b/drivers/block/ibnbd_server/ibnbd_srv_sysfs.c
@@ -0,0 +1,317 @@
+/*
+ * InfiniBand Network Block Driver
+ *
+ * Copyright (c) 2014 - 2017 ProfitBricks GmbH. All rights reserved.
+ * Authors: Fabian Holler < m...@fholler.de>
+ * Jack Wang <jinpu.w...@profitbricks.com>
+ * Kleber Souza <kleber.so...@profitbricks.com>
+ * Danil Kipnis <danil.kip...@profitbricks.com>
+ * Roman Pen <roman.peny...@profitbricks.com>
+ * Milind Dumbare <milind.dumb...@gmail.com>
+ *
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ *
+ */
+
+#include <uapi/linux/limits.h>
+#include <linux/kobject.h>
+#include <linux/sysfs.h>
+#include <linux/stat.h>
+#include <linux/genhd.h>
+#include <linux/list.h>
+
+#include "../ibnbd_inc/ibnbd.h"
+#include "ibnbd_srv.h"
+#include "ibnbd_srv_log.h"
+#include "ibnbd_srv_sysfs.h"
+
+static struct kobject *ibnbd_srv_kobj;
+static struct kobject *ibnbd_srv_devices_kobj;
+#define IBNBD_SYSFS_DIR "ibnbd"
+static char ibnbd_sysfs_dir[64] = IBNBD_SYSFS_DIR;
+
+static ssize_t ibnbd_srv_revalidate_dev_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 ibnbd_srv_revalidate_dev_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ struct ibnbd_srv_dev *dev = container_of(kobj, struct ibnbd_srv_dev,
+ dev_kobj);
+
+ if (!sysfs_streq(buf, "1")) {
+ ERR_NP("%s: invalid value: '%s'\n", attr->attr.name, buf);
+ return -EINVAL;
+ }
+ ret = ibnbd_srv_revalidate_dev(dev);
+ if (ret)
+ return ret;
+
+ return count;
+}
+
+static struct kobj_attribute ibnbd_srv_revalidate_dev_attr =
+ __ATTR(revalidate,
+ 0644,
+ ibnbd_srv_revalidate_dev_show,
+ ibnbd_srv_revalidate_dev_store);
+
+static struct attribute *ibnbd_srv_default_dev_attrs[] = {
+ &ibnbd_srv_revalidate_dev_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ibnbd_srv_default_dev_attr_group = {
+ .attrs = ibnbd_srv_default_dev_attrs,
+};
+
+static ssize_t ibnbd_srv_attr_show(struct kobject *kobj, struct attribute
*attr,
+ char *page)
+{
+ struct kobj_attribute *kattr;
+ int ret = -EIO;
+
+ kattr = container_of(attr, struct kobj_attribute, attr);
+ if (kattr->show)
+ ret = kattr->show(kobj, kattr, page);
+ return ret;
+}
+
+static ssize_t ibnbd_srv_attr_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *page, size_t length)
+{
+ struct kobj_attribute *kattr;
+ int ret = -EIO;
+
+ kattr = container_of(attr, struct kobj_attribute, attr);
+ if (kattr->store)
+ ret = kattr->store(kobj, kattr, page, length);
+ return ret;
+}
+
+static const struct sysfs_ops ibnbd_srv_sysfs_ops = {
+ .show = ibnbd_srv_attr_show,
+ .store = ibnbd_srv_attr_store,
+};
+
+static struct kobj_type ibnbd_srv_dev_ktype = {
+ .sysfs_ops = &ibnbd_srv_sysfs_ops,
+};
+
+static struct kobj_type ibnbd_srv_dev_clients_ktype = {
+ .sysfs_ops = &ibnbd_srv_sysfs_ops,
+};
+
+int ibnbd_srv_create_dev_sysfs(struct ibnbd_srv_dev *dev,
+ struct block_device *bdev,
+ const char *dir_name)
+{
+ struct kobject *bdev_kobj;
+ int ret;
+
+ ret = kobject_init_and_add(&dev->dev_kobj, &ibnbd_srv_dev_ktype,
+ ibnbd_srv_devices_kobj, dir_name);
+ if (ret)
+ return ret;
+
+ ret = kobject_init_and_add(&dev->dev_clients_kobj,
+ &ibnbd_srv_dev_clients_ktype,
+ &dev->dev_kobj, "clients");
+ if (ret)
+ goto err;
+
+ ret = sysfs_create_group(&dev->dev_kobj,
+ &ibnbd_srv_default_dev_attr_group);
+ if (ret)
+ goto err2;
+
+ bdev_kobj = &disk_to_dev(bdev->bd_disk)->kobj;
+ ret = sysfs_create_link(&dev->dev_kobj, bdev_kobj, "block_dev");
+ if (ret)
+ goto err3;
+
+ return 0;
+
+err3:
+ sysfs_remove_group(&dev->dev_kobj,
+ &ibnbd_srv_default_dev_attr_group);
+err2:
+ kobject_del(&dev->dev_clients_kobj);
+ kobject_put(&dev->dev_clients_kobj);
+err:
+ kobject_del(&dev->dev_kobj);
+ kobject_put(&dev->dev_kobj);
+ return ret;
+}
+
+void ibnbd_srv_destroy_dev_sysfs(struct ibnbd_srv_dev *dev)
+{
+ sysfs_remove_link(&dev->dev_kobj, "block_dev");
+ sysfs_remove_group(&dev->dev_kobj, &ibnbd_srv_default_dev_attr_group);
+ kobject_del(&dev->dev_clients_kobj);
+ kobject_put(&dev->dev_clients_kobj);
+ kobject_del(&dev->dev_kobj);
+ kobject_put(&dev->dev_kobj);
+}
+
+static ssize_t ibnbd_srv_dev_client_ro_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *page)
+{
+ struct ibnbd_srv_sess_dev *sess_dev;
+
+ sess_dev = container_of(kobj, struct ibnbd_srv_sess_dev, kobj);
+
+ return scnprintf(page, PAGE_SIZE, "%s\n",
+ (sess_dev->open_flags & FMODE_WRITE) ? "0" : "1");
+}
+
+static struct kobj_attribute ibnbd_srv_dev_client_ro_attr =
+ __ATTR(read_only, 0444,
+ ibnbd_srv_dev_client_ro_show,
+ NULL);
+
+static ssize_t ibnbd_srv_dev_client_mapping_path_show(
+ struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *page)
+{
+ struct ibnbd_srv_sess_dev *sess_dev;
+
+ sess_dev = container_of(kobj, struct ibnbd_srv_sess_dev, kobj);
+
+ return scnprintf(page, PAGE_SIZE, "%s\n", sess_dev->pathname);
+}
+
+static struct kobj_attribute ibnbd_srv_dev_client_mapping_path_attr =
+ __ATTR(mapping_path, 0444,
+ ibnbd_srv_dev_client_mapping_path_show,
+ NULL);
+
+static struct attribute *ibnbd_srv_default_dev_clients_attrs[] = {
+ &ibnbd_srv_dev_client_ro_attr.attr,
+ &ibnbd_srv_dev_client_mapping_path_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ibnbd_srv_default_dev_client_attr_group = {
+ .attrs = ibnbd_srv_default_dev_clients_attrs,
+};
+
+void ibnbd_srv_destroy_dev_client_sysfs(struct ibnbd_srv_sess_dev *sess_dev)
+{
+ struct completion sysfs_compl;
+
+ sysfs_remove_group(&sess_dev->kobj,
+ &ibnbd_srv_default_dev_client_attr_group);
+
+ init_completion(&sysfs_compl);
+ sess_dev->sysfs_release_compl = &sysfs_compl;
+ kobject_del(&sess_dev->kobj);
+ kobject_put(&sess_dev->kobj);
+ wait_for_completion(&sysfs_compl);
+}
+
+static void ibnbd_srv_sess_dev_release(struct kobject *kobj)
+{
+ struct ibnbd_srv_sess_dev *sess_dev;
+
+ sess_dev = container_of(kobj, struct ibnbd_srv_sess_dev, kobj);
+ if (sess_dev->sysfs_release_compl)
+ complete_all(sess_dev->sysfs_release_compl);
+}
+
+static struct kobj_type ibnbd_srv_sess_dev_ktype = {
+ .sysfs_ops = &ibnbd_srv_sysfs_ops,
+ .release = ibnbd_srv_sess_dev_release,
+};
+
+int ibnbd_srv_create_dev_client_sysfs(struct ibnbd_srv_sess_dev *sess_dev)
+{
+ int ret;
+
+ ret = kobject_init_and_add(&sess_dev->kobj, &ibnbd_srv_sess_dev_ktype,
+ &sess_dev->dev->dev_clients_kobj, "%s",
+ sess_dev->sess->str_addr);
+ if (ret)
+ return ret;
+
+ ret = sysfs_create_group(&sess_dev->kobj,
+ &ibnbd_srv_default_dev_client_attr_group);
+ if (ret)
+ goto err;
+
+ return 0;
+
+err:
+ kobject_del(&sess_dev->kobj);
+ kobject_put(&sess_dev->kobj);
+ return ret;
+}
+
+int ibnbd_srv_create_sysfs_files(void)
+{
+ int err;
+
+ ibnbd_srv_kobj = kobject_create_and_add(ibnbd_sysfs_dir, kernel_kobj);
+ if (!ibnbd_srv_kobj)
+ return -ENOMEM;
+
+ ibnbd_srv_devices_kobj = kobject_create_and_add("devices",
+ ibnbd_srv_kobj);
+ if (!ibnbd_srv_devices_kobj) {
+ err = -ENOMEM;
+ goto err;
+ }
+
+ return 0;
+
+err:
+ kobject_put(ibnbd_srv_kobj);
+ return err;
+}
+
+void ibnbd_srv_destroy_sysfs_files(void)
+{
+ kobject_put(ibnbd_srv_devices_kobj);
+ kobject_put(ibnbd_srv_kobj);
+}
diff --git a/drivers/block/ibnbd_server/ibnbd_srv_sysfs.h
b/drivers/block/ibnbd_server/ibnbd_srv_sysfs.h
new file mode 100644
index 0000000..1df232a
--- /dev/null
+++ b/drivers/block/ibnbd_server/ibnbd_srv_sysfs.h
@@ -0,0 +1,64 @@
+/*
+ * InfiniBand Network Block Driver
+ *
+ * Copyright (c) 2014 - 2017 ProfitBricks GmbH. All rights reserved.
+ * Authors: Fabian Holler < m...@fholler.de>
+ * Jack Wang <jinpu.w...@profitbricks.com>
+ * Kleber Souza <kleber.so...@profitbricks.com>
+ * Danil Kipnis <danil.kip...@profitbricks.com>
+ * Roman Pen <roman.peny...@profitbricks.com>
+ * Milind Dumbare <milind.dumb...@gmail.com>
+ *
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ *
+ */
+
+#ifndef _IBNBD_SRV_SYFS_H
+#define _IBNBD_SRV_SYFS_H
+
+int ibnbd_srv_create_dev_sysfs(struct ibnbd_srv_dev *dev,
+ struct block_device *bdev,
+ const char *dir_name);
+
+void ibnbd_srv_destroy_dev_sysfs(struct ibnbd_srv_dev *dev);
+
+int ibnbd_srv_create_dev_client_sysfs(struct ibnbd_srv_sess_dev *sess_dev);
+
+void ibnbd_srv_destroy_dev_client_sysfs(struct ibnbd_srv_sess_dev *sess_dev);
+
+int ibnbd_srv_create_sysfs_files(void);
+
+void ibnbd_srv_destroy_sysfs_files(void);
+
+#endif
--
2.7.4
