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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 v5 16/25] rnbd: client: private header with client structs and functions
Date: Fri, 20 Dec 2019 16:51:00 +0100
Message-ID: <20191220155109.8959-17-jinpuwang@gmail.com> (raw)
In-Reply-To: <20191220155109.8959-1-jinpuwang@gmail.com>

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

This header describes main structs and functions used by rnbd-client
module, mainly for managing RNBD sessions and mapped block devices,
creating and destroying sysfs entries.

Signed-off-by: Danil Kipnis <danil.kipnis@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
---
 drivers/block/rnbd/rnbd-clt.h | 169 ++++++++++++++++++++++++++++++++++
 1 file changed, 169 insertions(+)
 create mode 100644 drivers/block/rnbd/rnbd-clt.h

diff --git a/drivers/block/rnbd/rnbd-clt.h b/drivers/block/rnbd/rnbd-clt.h
new file mode 100644
index 000000000000..b8b51a41af8e
--- /dev/null
+++ b/drivers/block/rnbd/rnbd-clt.h
@@ -0,0 +1,169 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * InfiniBand Network Block Driver
+ *
+ * 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>
+ *          Swapnil Ingle <swapnil.ingle@profitbricks.com>
+ *
+ * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
+ * Authors: Roman Penyaev <roman.penyaev@profitbricks.com>
+ *          Jack Wang <jinpu.wang@cloud.ionos.com>
+ *          Danil Kipnis <danil.kipnis@cloud.ionos.com>
+ */
+/* Copyright (c) 2019 1&1 IONOS SE. All rights reserved.
+ * Authors: Jack Wang <jinpu.wang@cloud.ionos.com>
+ *          Danil Kipnis <danil.kipnis@cloud.ionos.com>
+ *          Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
+ *          Lutz Pogrell <lutz.pogrell@cloud.ionos.com>
+ */
+
+#ifndef RNBD_CLT_H
+#define RNBD_CLT_H
+
+#include <linux/wait.h>
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <linux/blk-mq.h>
+#include <linux/refcount.h>
+
+#include "rtrs.h"
+#include "rnbd-proto.h"
+#include "rnbd-log.h"
+
+#define BMAX_SEGMENTS 29
+#define RECONNECT_DELAY 30
+#define MAX_RECONNECTS -1
+
+enum rnbd_clt_dev_state {
+	DEV_STATE_INIT,
+	DEV_STATE_MAPPED,
+	DEV_STATE_MAPPED_DISCONNECTED,
+	DEV_STATE_UNMAPPED,
+};
+
+struct rnbd_iu_comp {
+	wait_queue_head_t wait;
+	int errno;
+};
+
+struct rnbd_iu {
+	union {
+		struct request *rq; /* for block io */
+		void *buf; /* for user messages */
+	};
+	struct rtrs_permit	*permit;
+	union {
+		/* use to send msg associated with a dev */
+		struct rnbd_clt_dev *dev;
+		/* use to send msg associated with a sess */
+		struct rnbd_clt_session *sess;
+	};
+	blk_status_t		status;
+	struct scatterlist	sglist[BMAX_SEGMENTS];
+	struct work_struct	work;
+	int			errno;
+	struct rnbd_iu_comp	comp;
+	atomic_t		refcount;
+};
+
+struct rnbd_cpu_qlist {
+	struct list_head	requeue_list;
+	spinlock_t		requeue_lock;
+	unsigned int		cpu;
+};
+
+struct rnbd_clt_session {
+	struct list_head        list;
+	struct rtrs_clt        *rtrs;
+	wait_queue_head_t       rtrs_waitq;
+	bool                    rtrs_ready;
+	struct rnbd_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 rnbd_clt_dev */
+	refcount_t		refcount;
+	char			sessname[NAME_MAX];
+	u8			ver; /* protocol version */
+};
+
+/**
+ * Submission queues.
+ */
+struct rnbd_queue {
+	struct list_head	requeue_list;
+	unsigned long		in_list;
+	struct rnbd_clt_dev	*dev;
+	struct blk_mq_hw_ctx	*hctx;
+};
+
+struct rnbd_clt_dev {
+	struct rnbd_clt_session	*sess;
+	struct request_queue	*queue;
+	struct rnbd_queue	*hw_queues;
+	u32			device_id;
+	/* local Idr index - used to track minor number allocations. */
+	u32			clt_device_id;
+	struct mutex		lock;
+	enum rnbd_clt_dev_state	dev_state;
+	char			pathname[NAME_MAX];
+	enum rnbd_access_mode	access_mode;
+	bool			read_only;
+	bool			rotational;
+	u32			max_hw_sectors;
+	u32			max_write_same_sectors;
+	u32			max_discard_sectors;
+	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];
+	refcount_t		refcount;
+	struct work_struct	unmap_on_rmmod_work;
+};
+
+/* rnbd-clt.c */
+
+struct rnbd_clt_dev *rnbd_clt_map_device(const char *sessname,
+					   struct rtrs_addr *paths,
+					   size_t path_cnt,
+					   const char *pathname,
+					   enum rnbd_access_mode access_mode);
+int rnbd_clt_unmap_device(struct rnbd_clt_dev *dev, bool force,
+			   const struct attribute *sysfs_self);
+
+int rnbd_clt_remap_device(struct rnbd_clt_dev *dev);
+int rnbd_clt_resize_disk(struct rnbd_clt_dev *dev, size_t newsize);
+
+/* rnbd-clt-sysfs.c */
+
+int rnbd_clt_create_sysfs_files(void);
+
+void rnbd_clt_destroy_sysfs_files(void);
+void rnbd_clt_destroy_default_group(void);
+
+void rnbd_clt_remove_dev_symlink(struct rnbd_clt_dev *dev);
+
+#endif /* RNBD_CLT_H */
-- 
2.17.1


  parent reply index

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-20 15:50 [PATCH v5 00/25] RTRS (former IBTRS) rdma transport library and the corresponding RNBD (former IBNBD) rdma network block device Jack Wang
2019-12-20 15:50 ` [PATCH v5 01/25] sysfs: export sysfs_remove_file_self() Jack Wang
2019-12-20 16:26   ` Jinpu Wang
2019-12-20 15:50 ` [PATCH v5 02/25] rtrs: public interface header to establish RDMA connections Jack Wang
2019-12-21 10:15   ` Leon Romanovsky
2019-12-21 14:27     ` Danil Kipnis
2019-12-22  7:36       ` Leon Romanovsky
2019-12-23  7:38         ` Jinpu Wang
2019-12-23  8:04           ` Leon Romanovsky
2019-12-23 10:31             ` Jinpu Wang
2019-12-20 15:50 ` [PATCH v5 03/25] rtrs: private headers with rtrs protocol structs and helpers Jack Wang
2019-12-20 15:50 ` [PATCH v5 04/25] rtrs: core: lib functions shared between client and server modules Jack Wang
2019-12-20 15:50 ` [PATCH v5 05/25] rtrs: client: private header with client structs and functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 06/25] rtrs: client: main functionality Jack Wang
2019-12-20 15:50 ` [PATCH v5 07/25] rtrs: client: statistics functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 08/25] rtrs: client: sysfs interface functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 09/25] rtrs: server: private header with server structs and functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 10/25] rtrs: server: main functionality Jack Wang
2019-12-20 15:50 ` [PATCH v5 11/25] rtrs: server: statistics functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 12/25] rtrs: server: sysfs interface functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 13/25] rtrs: include client and server modules into kernel compilation Jack Wang
2019-12-20 15:50 ` [PATCH v5 14/25] rtrs: a bit of documentation Jack Wang
2019-12-20 15:50 ` [PATCH v5 15/25] rnbd: private headers with rnbd protocol structs and helpers Jack Wang
2019-12-20 15:51 ` Jack Wang [this message]
2019-12-20 15:51 ` [PATCH v5 17/25] rnbd: client: main functionality Jack Wang
2019-12-20 15:51 ` [PATCH v5 18/25] rnbd: client: sysfs interface functions Jack Wang
2019-12-20 15:51 ` [PATCH v5 19/25] rnbd: server: private header with server structs and functions Jack Wang
2019-12-20 15:51 ` [PATCH v5 20/25] rnbd: server: main functionality Jack Wang
2019-12-20 15:51 ` [PATCH v5 21/25] rnbd: server: functionality for IO submission to file or block dev Jack Wang
2019-12-20 15:51 ` [PATCH v5 22/25] rnbd: server: sysfs interface functions Jack Wang
2019-12-23  8:14   ` Leon Romanovsky
2019-12-23  8:33     ` Jinpu Wang
2019-12-20 15:51 ` [PATCH v5 23/25] rnbd: include client and server modules into kernel compilation Jack Wang
2019-12-20 15:51 ` [PATCH v5 24/25] rnbd: a bit of documentation Jack Wang
2019-12-20 15:51 ` [PATCH v5 25/25] MAINTAINERS: Add maintainers for RNBD/RTRS modules Jack Wang
2019-12-22  9:55   ` Gal Pressman
2019-12-23  7:20     ` Jinpu Wang
2019-12-21 10:17 ` [PATCH v5 00/25] RTRS (former IBTRS) rdma transport library and the corresponding RNBD (former IBNBD) rdma network block device Leon Romanovsky
2020-01-02 18:18 ` Jason Gunthorpe
2020-01-03 12:39   ` Jinpu Wang
2020-01-03 16:28     ` Bart Van Assche
2020-01-06 17:07       ` Jinpu Wang
2020-01-07 10:56         ` Jinpu Wang
2020-01-16 16:41           ` Bart Van Assche
2020-01-16 16:46             ` Jinpu Wang

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