From patchwork Mon May 11 13:51:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Danil Kipnis X-Patchwork-Id: 11540857 X-Patchwork-Delegate: jgg@ziepe.ca Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9CC67913 for ; Mon, 11 May 2020 13:53:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8467620820 for ; Mon, 11 May 2020 13:53:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=cloud.ionos.com header.i=@cloud.ionos.com header.b="dweB/TsS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730249AbgEKNxa (ORCPT ); Mon, 11 May 2020 09:53:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1730262AbgEKNx3 (ORCPT ); Mon, 11 May 2020 09:53:29 -0400 Received: from mail-wm1-x344.google.com (mail-wm1-x344.google.com [IPv6:2a00:1450:4864:20::344]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3817FC061A0C for ; Mon, 11 May 2020 06:53:28 -0700 (PDT) Received: by mail-wm1-x344.google.com with SMTP id m12so13226945wmc.0 for ; Mon, 11 May 2020 06:53:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cloud.ionos.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=9ApNUZv+jn8U1ruuCY92J66SowBgO5SapbNz4atRxmk=; b=dweB/TsSAkSXVCeq26wW6V9rzi5D6BOw5S9SsId58WT89VFuKE3yAIfZ5NuWVbqw4v E/BmD5ohbZAtma58bEkCyYDKz5QeFJP+NTucaErDrtv8TAGfTWPVwJHn2CX3RlmXMS1v kaNbZhOD2+eP/1bEOoHroycrMHMB4h8FHHDDf8xjW65uRUcArUJfhvaT1CF3yMoMGWHG YbneESkZtCYHPFL5QfrMJiTFMEhY1JwMAubcrYFuZsOJp1mhX4y5C9ePdKjKp1fUgkax EAZ+N3G0QFZDE2byVYDqV/JyK+5iqKOh1e0BptlUzhAUZX4PVq8nTVS85cClvjUg23t+ DEOg== 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:mime-version:content-transfer-encoding; bh=9ApNUZv+jn8U1ruuCY92J66SowBgO5SapbNz4atRxmk=; b=DVXDsQcMOv8g95IyGCawORQPMvJCw++5SATc6yzDK8hjwsUiDYmoIvQtjL6r7Zu3d/ aAMRyNYyBJl+Emxjb6EK4lZT+jO7INVWRtGef0+ghZPhR8fUGhM0ScmNjBwp9Jcli6pq 5N1nD2s20rGefyiCkR9JDzKvXG3vCIah7uOcySDmVMS6tHKJN5d3GFNNKoX97g18Mksp jfeng0tNXbo+kl8LwlezReOgkIihEtfCE/rGHGwF7GmzakRk8EtXX3MSLKEwaRAlXNNK pMu5trJIjD2Js/AwXmxkQQbgRZAR7ffM61l++dWBXw7GBgYPQJJ1g51eOyKuRnzshZM4 4c9A== X-Gm-Message-State: AGi0PuaOzvXvIJIrIj1IP9i/d57DcfUr8uFf8ZvMZvNwVORmMq7+dnY8 mFYlOmA0426HbJ3We1CVh/lk X-Google-Smtp-Source: APiQypL8DKnDBmAgAb3nM37oXZsOG88Xo2u4R2gR8yqIb2TUm4uRp0XI0G07YpBiElAx6/kbQrCCTA== X-Received: by 2002:a1c:e906:: with SMTP id q6mr12369138wmc.62.1589205206868; Mon, 11 May 2020 06:53:26 -0700 (PDT) Received: from dkxps.local (dslb-002-204-227-207.002.204.pools.vodafone-ip.de. [2.204.227.207]) by smtp.gmail.com with ESMTPSA id v205sm9220018wmg.11.2020.05.11.06.53.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 May 2020 06:53:26 -0700 (PDT) From: Danil Kipnis 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, pankaj.gupta@cloud.ionos.com Subject: [PATCH v15 16/25] block/rnbd: client: private header with client structs and functions Date: Mon, 11 May 2020 15:51:22 +0200 Message-Id: <20200511135131.27580-17-danil.kipnis@cloud.ionos.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200511135131.27580-1-danil.kipnis@cloud.ionos.com> References: <20200511135131.27580-1-danil.kipnis@cloud.ionos.com> MIME-Version: 1.0 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@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 Reviewed-by: Bart Van Assche --- drivers/block/rnbd/rnbd-clt.h | 156 ++++++++++++++++++++++++++++++++++ 1 file changed, 156 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..ed33654aa486 --- /dev/null +++ b/drivers/block/rnbd/rnbd-clt.h @@ -0,0 +1,156 @@ +/* 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 +#include "rnbd-proto.h" +#include "rnbd-log.h" + +/* Max. number of segments per IO request, Mellanox Connect X ~ Connect X5, + * choose minimial 30 for all, minus 1 for internal protocol, so 29. + */ +#define BMAX_SEGMENTS 29 +/* time in seconds between reconnect tries, default to 30 s */ +#define RECONNECT_DELAY 30 +/* + * Number of times to reconnect on error before giving up, 0 for * disabled, + * -1 for forever + */ +#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, u16 port_nr, + 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 */