From patchwork Fri Feb 2 14:08:55 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Pen X-Patchwork-Id: 10196841 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id F0B536037D for ; Fri, 2 Feb 2018 14:11:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E1E1C28E86 for ; Fri, 2 Feb 2018 14:11:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D3DBD28E89; Fri, 2 Feb 2018 14:11:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 26C3628E86 for ; Fri, 2 Feb 2018 14:11:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751221AbeBBOLU (ORCPT ); Fri, 2 Feb 2018 09:11:20 -0500 Received: from mail-wm0-f68.google.com ([74.125.82.68]:35799 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752117AbeBBOLB (ORCPT ); Fri, 2 Feb 2018 09:11:01 -0500 Received: by mail-wm0-f68.google.com with SMTP id r78so12684444wme.0 for ; Fri, 02 Feb 2018 06:11:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=profitbricks-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=jC9lzRvQZqWvGgXXWg8doG55ukQ54eeBZq/KId2snkY=; b=kX9gfss7PW00jfK/QBpOpkdEI6l2iHIPbL0ZKXetJeUbUoFPKrEeqihpCTHai/mtHh cHRoiXGRNdA26ihuomFK2lCLpSN+qwP7Xm53zXkE+M7zrOwAiLTy+6ljYHYqiGYfll/o 1PIYxEjzBTPZy7a6FrsiMLxrkwLdvtd57zSdKMdB6QOu5lC5T77Y2noQHcKJD0oyzNki mwJVM6a4OcGCuOHpfQ6XWuPvY3o2AcjqLtpV9mC9FjdfIJ38jYKQ3sh6Ow77bGNYo3fN hJKsAACnhEpRAsz3pPeNJDDmYVhEU9IhCjXDsxGcIYvwhhIAaa25+WtOYtw9c/8NdL2j 1JwA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=jC9lzRvQZqWvGgXXWg8doG55ukQ54eeBZq/KId2snkY=; b=uHdL1nS/7DmXUG6HWOMXNZA7G1HWZ0QMx8mp1hUYO7rOZjwWP1NjQn0Omg/GgFlDj0 YrSBG2Ze9XBSZVJknLZ7HCRwzup07S637bGXucTtPBLvnAkqIQoqpIZiSQLw7lVtWRHy g/5UFI66CmtB483BuoZX9CmzZpWYEtIdLWM6SDhn4VLiQhIIv1N2X7jVVzTjGaK/2V1I lRZrvUBKr+imZQP0K2arUtXUkwkbCh/i4TDwOsbOSjAnGJaSYpuXTfRvDOr74n/O61Il 7yFoRnRlUJaUbmbRgnMD9SnwwJe5WeK2jBwY5R0bHX9HpvvtWfJQNIMK8UXzFSyzmu3w /Y/A== X-Gm-Message-State: AKwxytc+myXbsHPLS5uztzztEN85tdVUR1SCf/7mv1xDWzGXGVeG9f6/ Ysc1bm7yRXT1iQEAfFRZgB8a9aKx X-Google-Smtp-Source: AH8x2243CctmW6/8bGJtz3BAzuNUopeBtvzG6p8qYnB3WaBrJ0SMli7SDDMkhZxj2VGOicGKO2uSew== X-Received: by 10.28.218.12 with SMTP id r12mr28317732wmg.157.1517580659054; Fri, 02 Feb 2018 06:10:59 -0800 (PST) Received: from pb.pb.local ([62.217.45.26]) by smtp.gmail.com with ESMTPSA id v186sm798819wmf.17.2018.02.02.06.10.57 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 02 Feb 2018 06:10:58 -0800 (PST) From: Roman Pen To: linux-block@vger.kernel.org, linux-rdma@vger.kernel.org Cc: Jens Axboe , Christoph Hellwig , Sagi Grimberg , Bart Van Assche , Or Gerlitz , Roman Pen , Danil Kipnis , Jack Wang Subject: [PATCH 15/24] ibnbd: client: private header with client structs and functions Date: Fri, 2 Feb 2018 15:08:55 +0100 Message-Id: <20180202140904.2017-16-roman.penyaev@profitbricks.com> X-Mailer: git-send-email 2.13.1 In-Reply-To: <20180202140904.2017-1-roman.penyaev@profitbricks.com> References: <20180202140904.2017-1-roman.penyaev@profitbricks.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This header describes main structs and functions used by ibnbd-client module, mainly for managing IBNBD sessions and mapped block devices, creating and destroying sysfs entries. Signed-off-by: Roman Pen Signed-off-by: Danil Kipnis Cc: Jack Wang --- drivers/block/ibnbd/ibnbd-clt.h | 193 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 193 insertions(+) diff --git a/drivers/block/ibnbd/ibnbd-clt.h b/drivers/block/ibnbd/ibnbd-clt.h new file mode 100644 index 000000000000..b3d72b2962dd --- /dev/null +++ b/drivers/block/ibnbd/ibnbd-clt.h @@ -0,0 +1,193 @@ +/* + * InfiniBand Network Block Driver + * + * Copyright (c) 2014 - 2017 ProfitBricks GmbH. All rights reserved. + * Authors: Fabian Holler + * Jack Wang + * Kleber Souza + * Danil Kipnis + * Roman Penyaev + * Milind Dumbare + * + * Copyright (c) 2017 - 2018 ProfitBricks GmbH. All rights reserved. + * Authors: Danil Kipnis + * Roman Penyaev + * + * 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 . + */ + +#ifndef IBNBD_CLT_H +#define IBNBD_CLT_H + +#include +#include +#include +#include +#include + +#include "ibtrs.h" +#include "ibnbd-proto.h" +#include "ibnbd-log.h" + +#define BMAX_SEGMENTS 31 +#define RECONNECT_DELAY 30 +#define MAX_RECONNECTS -1 + +enum ibnbd_clt_dev_state { + DEV_STATE_INIT, + DEV_STATE_MAPPED, + DEV_STATE_MAPPED_DISCONNECTED, + DEV_STATE_UNMAPPED, +}; + +enum ibnbd_queue_mode { + BLK_MQ, + BLK_RQ +}; + +struct ibnbd_iu_comp { + wait_queue_head_t wait; + int errno; +}; + +struct ibnbd_iu { + union { + struct request *rq; /* for block io */ + void *buf; /* for user messages */ + }; + struct ibtrs_tag *tag; + union { + /* use to send msg associated with a dev */ + struct ibnbd_clt_dev *dev; + /* use to send msg associated with a sess */ + struct ibnbd_clt_session *sess; + }; + blk_status_t status; + struct scatterlist sglist[BMAX_SEGMENTS]; + struct work_struct work; + int errno; + struct ibnbd_iu_comp *comp; +}; + +struct ibnbd_cpu_qlist { + struct list_head requeue_list; + spinlock_t requeue_lock; + unsigned int cpu; +}; + +struct ibnbd_clt_session { + struct list_head list; + struct ibtrs_clt *ibtrs; + wait_queue_head_t ibtrs_waitq; + bool ibtrs_ready; + 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_clt_dev */ + refcount_t refcount; + char sessname[NAME_MAX]; + u8 ver; /* protocol version */ +}; + +/** + * Submission queues. + */ +struct ibnbd_queue { + struct list_head requeue_list; + unsigned long in_list; + struct ibnbd_clt_dev *dev; + struct blk_mq_hw_ctx *hctx; +}; + +struct ibnbd_clt_dev { + struct ibnbd_clt_session *sess; + struct request_queue *queue; + struct ibnbd_queue *hw_queues; + struct delayed_work rq_delay_work; + u32 device_id; + /* local Idr index - used to track minor number allocations. */ + u32 clt_device_id; + struct mutex lock; + enum ibnbd_clt_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 */ + 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_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; +}; + +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"; + } +} + +/* ibnbd-clt.c */ + +struct ibnbd_clt_dev *ibnbd_clt_map_device(const char *sessname, + struct ibtrs_addr *paths, + size_t path_cnt, + const char *pathname, + enum ibnbd_access_mode access_mode, + enum ibnbd_queue_mode queue_mode, + enum ibnbd_io_mode io_mode); +int ibnbd_clt_unmap_device(struct ibnbd_clt_dev *dev, bool force, + const struct attribute *sysfs_self); + +int ibnbd_clt_remap_device(struct ibnbd_clt_dev *dev); +int ibnbd_clt_resize_disk(struct ibnbd_clt_dev *dev, size_t newsize); + +/* ibnbd-clt-sysfs.c */ + +int ibnbd_clt_create_sysfs_files(void); + +void ibnbd_clt_destroy_sysfs_files(void); +void ibnbd_clt_destroy_default_group(void); + +void ibnbd_clt_remove_dev_symlink(struct ibnbd_clt_dev *dev); +void ibnbd_sysfs_remove_file_self(struct kobject *kobj, + const struct attribute *attr); + +#endif /* IBNBD_CLT_H */