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_client/ibnbd_clt.h | 231 +++++++++++++++++++++++++++++++++
1 file changed, 231 insertions(+)
create mode 100644 drivers/block/ibnbd_client/ibnbd_clt.h
diff --git a/drivers/block/ibnbd_client/ibnbd_clt.h
b/drivers/block/ibnbd_client/ibnbd_clt.h
new file mode 100644
index 0000000..3f0db78
--- /dev/null
+++ b/drivers/block/ibnbd_client/ibnbd_clt.h
@@ -0,0 +1,231 @@
+/*
+ * 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_CLT_H
+#define _IBNBD_CLT_H
+#include <linux/blkdev.h>
+#include <linux/wait.h> /* for wait_queue_head_t */
+#include <linux/in.h> /* for sockaddr_in */
+#include <linux/inet.h> /* for sockaddr_in */
+#include <linux/blk-mq.h>
+#include "ibnbd_clt_log.h"
+#include "../ibnbd_inc/ibnbd.h"
+#include "../ibnbd_inc/ibnbd-proto.h" /* ibnbd protocol messages */
+#include <rdma/ibtrs_clt.h> /* for ibtrs api */
+#include <rdma/ibtrs.h>
+
+#define IP_PREFIX "ip:"
+#define IP_PREFIX_LEN strlen(IP_PREFIX)
+#define GID_PREFIX "gid:"
+#define GID_PREFIX_LEN strlen(GID_PREFIX)
+
+#define BMAX_SEGMENTS 31
+#define RECONNECT_DELAY 30
+#define MAX_RECONNECTS -1
+
+enum ibnbd_dev_state {
+ DEV_STATE_INIT,
+ DEV_STATE_INIT_CLOSED,
+ DEV_STATE_CLOSED,
+ DEV_STATE_UNMAPPED,
+ DEV_STATE_OPEN
+};
+
+enum ibnbd_queue_mode {
+ BLK_MQ,
+ BLK_RQ
+};
+
+struct ibnbd_iu {
+ struct request *rq;
+ struct ibtrs_tag *tag;
+ struct ibnbd_dev *dev;
+ struct ibnbd_msg_io msg;
+ int errno;
+ struct scatterlist sglist[BMAX_SEGMENTS];
+};
+
+struct ibnbd_cpu_qlist {
+ struct list_head requeue_list;
+ spinlock_t requeue_lock;
+ unsigned int cpu;
+};
+
+enum sess_state {
+ SESS_STATE_READY,
+ SESS_STATE_DISCONNECTED,
+ SESS_STATE_DESTROYED,
+};
+
+struct ibnbd_session {
+ struct list_head list;
+ struct ibtrs_session *sess;
+ struct ibnbd_cpu_qlist __percpu
+ *cpu_queues;
+ DECLARE_BITMAP(cpu_queues_bm, NR_CPUS);
+ int __percpu *cpu_rr; /* per-cpu var for CPU round-robin */
+ atomic_t busy;
+ int queue_depth;
+ u32 max_io_size;
+ struct blk_mq_tag_set tag_set;
+ struct mutex lock; /* protects state and devs_list */
+ struct list_head devs_list; /* list of struct ibnbd_dev */
+ struct kref refcount;
+ struct sockaddr_storage addr;
+ char str_addr[IBTRS_ADDRLEN];
+ char hostname[MAXHOSTNAMELEN];
+ enum sess_state state;
+ u8 ver; /* protocol version */
+ struct completion *sess_info_compl;
+};
+
+struct ibnbd_work {
+ struct work_struct work;
+ struct ibnbd_session *sess;
+};
+
+/**
+ * Submission queues.
+ */
+struct ibnbd_queue {
+ struct list_head requeue_list;
+ unsigned long in_list;
+ struct ibnbd_dev *dev;
+ struct blk_mq_hw_ctx *hctx;
+};
+
+struct ibnbd_dev {
+ struct list_head g_list;
+ struct ibnbd_session *sess;
+ struct request_queue *queue;
+ struct ibnbd_queue *hw_queues;
+ struct delayed_work rq_delay_work;
+ u32 device_id;
+ u32 clt_device_id;
+ struct completion *open_compl; /* completion for open msg */
+ int open_errno;
+ struct mutex lock;
+ enum ibnbd_dev_state dev_state;
+ enum ibnbd_queue_mode queue_mode;
+ enum ibnbd_io_mode io_mode; /* user requested */
+ enum ibnbd_io_mode remote_io_mode; /* server really used */
+ /* local Idr index - used to track minor number allocations. */
+ char pathname[NAME_MAX];
+ enum ibnbd_access_mode access_mode;
+ bool read_only;
+ bool rotational;
+ u32 max_hw_sectors;
+ u32 max_write_same_sectors;
+ u32 max_discard_sectors;
+ u32 discard_zeroes_data;
+ u32 discard_granularity;
+ u32 discard_alignment;
+ u16 secure_discard;
+ u16 physical_block_size;
+ u16 logical_block_size;
+ u16 max_segments;
+ size_t nsectors;
+ u64 size; /* device size in bytes */
+ struct list_head list;
+ struct gendisk *gd;
+ struct kobject kobj;
+ char blk_symlink_name[NAME_MAX];
+ struct completion *close_compl;
+ atomic_t refcount;
+};
+
+static inline const char *ibnbd_queue_mode_str(enum ibnbd_queue_mode mode)
+{
+ switch (mode) {
+ case BLK_RQ:
+ return "rq";
+ case BLK_MQ:
+ return "mq";
+ default:
+ return "unknown";
+ }
+}
+
+int ibnbd_close_device(struct ibnbd_dev *dev, bool force);
+struct ibnbd_session *ibnbd_create_session(const struct sockaddr_storage
*addr);
+struct ibnbd_session *ibnbd_clt_find_sess(const struct sockaddr_storage *addr);
+void ibnbd_clt_sess_release(struct kref *ref);
+struct ibnbd_dev *ibnbd_client_add_device(struct ibnbd_session *sess,
+ const char *pathname,
+ enum ibnbd_access_mode access_mode,
+ enum ibnbd_queue_mode queue_mode,
+ enum ibnbd_io_mode io_mode);
+void ibnbd_destroy_gen_disk(struct ibnbd_dev *dev);
+int ibnbd_addr_to_str(const struct sockaddr_storage *addr,
+ char *buf, size_t len);
+bool ibnbd_clt_dev_is_open(struct ibnbd_dev *dev);
+bool ibnbd_clt_dev_is_mapped(const char *pathname);
+int open_remote_device(struct ibnbd_dev *dev);
+
+const char *ibnbd_clt_get_io_mode(const struct ibnbd_dev *dev);
+
+#define ERR_DEVS(sess, fmt, ...) \
+({ struct ibnbd_dev *dev; \
+ \
+ mutex_lock(&sess->lock); \
+ list_for_each_entry(dev, &sess->devs_list, list) \
+ pr_err("ibnbd L%d <%s@%s> ERR:" fmt, \
+ __LINE__, dev->pathname, dev->sess->str_addr,\
+ ##__VA_ARGS__); \
+ mutex_unlock(&sess->lock); \
+})
+
+#define INFO_DEVS(sess, fmt, ...) \
+({ struct ibnbd_dev *dev; \
+ \
+ mutex_lock(&sess->lock); \
+ list_for_each_entry(dev, &sess->devs_list, list) \
+ pr_info("ibnbd <%s@%s> ERR:" fmt, \
+ dev->pathname, dev->sess->str_addr,\
+ ##__VA_ARGS__); \
+ mutex_unlock(&sess->lock); \
+})
+#endif /* _IBNBD_CLT_H */
--
2.7.4
