From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 004B2C33CB1 for ; Thu, 16 Jan 2020 12:59:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BDCFC2073A for ; Thu, 16 Jan 2020 12:59:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="dAPlKq7w" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727029AbgAPM7o (ORCPT ); Thu, 16 Jan 2020 07:59:44 -0500 Received: from mail-ed1-f65.google.com ([209.85.208.65]:37861 "EHLO mail-ed1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727002AbgAPM7l (ORCPT ); Thu, 16 Jan 2020 07:59:41 -0500 Received: by mail-ed1-f65.google.com with SMTP id cy15so18849015edb.4; Thu, 16 Jan 2020 04:59:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=FM2XUcFiei2OFmH9Sj1Z9FnGgVC+z2zgQuzR7A9MdZM=; b=dAPlKq7w64iaCfQFmfkdLFZd1U/1apCSPs2U9gPm4173CaVtTzJT54kfHMiUM3QixI SADXE5BgV1s5o3h/xM7h/5keJIkoHfEiQKX09n6MuSacICUIOqPwMUG4/r56oDaJPan2 LnxXXGzu9un2sEQ9rZ8zPyDj5d2b+FU8UP+8SZPDE4MAVrK3aFhLibMqnkDbaDpxqCBJ fBaa1JW5UFOwhmmAnrUZweDO6F9pxdnNruS8NRV2SomNH8Lxxj7HUA4RtvPnN7oW5mC+ zzx7+ha2eCHEfj8jqBhrA27GqkA+J+jjbSTJLHt2OE4eUg/ZHIpR1pyPYjp5vPHJ/+DX 1osw== 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=FM2XUcFiei2OFmH9Sj1Z9FnGgVC+z2zgQuzR7A9MdZM=; b=Ps5cZQNzHkGyWNW+UgoIngcyzTmSuwDQ4r24Qx5TrxGT8u3l0rqIfsrkDcpN7wpNVQ C8hjLzTsxGYErHF2XCd0FtTD9AJD9XprM3AFQS4+5ZLaJOMk4wW+iA/ymeMICQhkq/UP Ey1GK3ZJp7QLI44JueVlBowKkbbWOcxjO/PjFbGpaOXUGvj/ywLS9DqwkRECp2ndcjfM /DA7H4hmi/DoEuvEG5BhTrlrwvaZiXmiA7XQojmr7CJjrRpxDDrt+uDu6drugjICapfK ZUrCCldiBDpWPOpXkB0gkVribveE6/GBLtArINnYFGvKTP1tnOPIQc+nCd43t5zPGyJR 1OWA== X-Gm-Message-State: APjAAAW6MPI/k75pDMXBuACUR5ggjs4vS+ZbkbUIoczH1dK8b7x19OKl GFMrAfK9KbiKiSo9JKwrZOnuhNJ5 X-Google-Smtp-Source: APXvYqyptph+2Z7P+G6Vh+Zjz3Ucuo4YDJpChGHuCWatnwNqBhdi/kCXMy1+401dmNtyACOcJhfiTg== X-Received: by 2002:a17:906:34d7:: with SMTP id h23mr2865607ejb.90.1579179578838; Thu, 16 Jan 2020 04:59:38 -0800 (PST) Received: from jwang-Latitude-5491.fritz.box ([2001:16b8:4956:1800:d464:b0ea:3ef4:abbb]) by smtp.gmail.com with ESMTPSA id b13sm697289ejl.5.2020.01.16.04.59.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Jan 2020 04:59:38 -0800 (PST) From: Jack Wang 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, jgg@ziepe.ca, danil.kipnis@cloud.ionos.com, jinpu.wang@cloud.ionos.com, rpenyaev@suse.de Subject: [PATCH v7 16/25] block/rnbd: client: private header with client structs and functions Date: Thu, 16 Jan 2020 13:59:06 +0100 Message-Id: <20200116125915.14815-17-jinpuwang@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200116125915.14815-1-jinpuwang@gmail.com> References: <20200116125915.14815-1-jinpuwang@gmail.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Jack Wang 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 Signed-off-by: Jack Wang --- drivers/block/rnbd/rnbd-clt.h | 150 ++++++++++++++++++++++++++++++++++ 1 file changed, 150 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..aea91dd6aaf0 --- /dev/null +++ b/drivers/block/rnbd/rnbd-clt.h @@ -0,0 +1,150 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * RDMA Network Block Driver + * + * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved. + * + * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved. + * + * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved. + */ + +#ifndef RNBD_CLT_H +#define RNBD_CLT_H + +#include +#include +#include +#include +#include + +#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; + }; + 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