From patchwork Mon Apr 27 14:10:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Danil Kipnis X-Patchwork-Id: 11512219 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 0F395912 for ; Mon, 27 Apr 2020 14:11:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E1D492063A for ; Mon, 27 Apr 2020 14:11:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=cloud.ionos.com header.i=@cloud.ionos.com header.b="BmbP0fFk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727874AbgD0OLS (ORCPT ); Mon, 27 Apr 2020 10:11:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727843AbgD0OLR (ORCPT ); Mon, 27 Apr 2020 10:11:17 -0400 Received: from mail-wm1-x343.google.com (mail-wm1-x343.google.com [IPv6:2a00:1450:4864:20::343]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32C55C0610D5 for ; Mon, 27 Apr 2020 07:11:16 -0700 (PDT) Received: by mail-wm1-x343.google.com with SMTP id g12so20611282wmh.3 for ; Mon, 27 Apr 2020 07:11:16 -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=N7fDFqCq0ADGatm/DjyFprRRN9Ur5QK+1mnQDI1yctA=; b=BmbP0fFkZziGdUWq1RWex2U4k+dkeHgBCVbMnhoHNtQ5Im60nwybEj6l8WdFElr3gz wVJqsnIwUoK+IKH9XT+v+GdxJXIxnL0fw1+GTncvazKXxDeJySTaL1C3I2wiMcCnrMPY oJ5Jcnb4HwBkVOeGjGEJqcP50LPhc4eTvgRrrsybfuGssvLAzre4w/H7JrrMNvfimPaE yzcnKCPOi8G2E6eIOGFo0IS9oI4MoUhrUc4Q6GuahIKqB9cymEZAY5BNfIeLbeQw+Qb/ eSkDCyd2taQ8N7mefoazsPAuDXri/Sy+MudFA/g1UY2RKzPQe6NkkHWmKEaES1iw9P3x WccA== 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=N7fDFqCq0ADGatm/DjyFprRRN9Ur5QK+1mnQDI1yctA=; b=f3x3L1spqJg/3p+l4jY/mqlUtScnzmuf12YHXn23qYgN2QUo77siGHLIcVee8h8VRG pRYAqjd9Snx2VovCa76mvhz9S8+mGyAsBWD2RX4ss9j9y2TXNCIIy6keXRLKsNKTISk/ Tzn04K4ZCAaKBuo2Ws1PMAAapx8FYAoxlrygS9wxvvca8iEJygaSQKaDRvWp2bPdFg7N r1Q/ZCgBL3W7Di+uJ4VMnNV0t+5Gdj3iB0Snt/9ToxEvH6SSxhEWD2lxi+A5VcadXte2 YQHRqGtALaPRGyQ6JK+qqXECvzODCfHYThzH1jsZq3heH+n9jokYOxZBGPEL/mkYviTZ c76g== X-Gm-Message-State: AGi0PuYScjQyOTFccfI6gPwk2nD6QKHuTa21rMbeonXCxkarS5jnQqxK 0ZBgDuAZ4dhgZG0vMjfWxzSQ X-Google-Smtp-Source: APiQypK8Q4t9jrmCnGOITtG+kKhn0dFplL6CVO2fsf00Ol3hhQl0DI3Vc5iMFUClH9OdfeZKyd7qog== X-Received: by 2002:a7b:c850:: with SMTP id c16mr24946426wml.108.1587996674830; Mon, 27 Apr 2020 07:11:14 -0700 (PDT) Received: from dkxps.fkb.profitbricks.net (dslb-002-204-227-207.002.204.pools.vodafone-ip.de. [2.204.227.207]) by smtp.gmail.com with ESMTPSA id o3sm21499756wru.68.2020.04.27.07.11.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Apr 2020 07:11:13 -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 v13 05/25] RDMA/rtrs: client: private header with client structs and functions Date: Mon, 27 Apr 2020 16:10:00 +0200 Message-Id: <20200427141020.655-6-danil.kipnis@cloud.ionos.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200427141020.655-1-danil.kipnis@cloud.ionos.com> References: <20200427141020.655-1-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 rtrs-client module, mainly for managing rtrs sessions, creating/destroying sysfs entries, accounting statistics on client side. Signed-off-by: Danil Kipnis Signed-off-by: Jack Wang --- drivers/infiniband/ulp/rtrs/rtrs-clt.h | 251 +++++++++++++++++++++++++ 1 file changed, 251 insertions(+) create mode 100644 drivers/infiniband/ulp/rtrs/rtrs-clt.h diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.h b/drivers/infiniband/ulp/rtrs/rtrs-clt.h new file mode 100644 index 000000000000..039a2ebba2f9 --- /dev/null +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.h @@ -0,0 +1,251 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * RDMA Transport Layer + * + * 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 RTRS_CLT_H +#define RTRS_CLT_H + +#include +#include "rtrs-pri.h" + +/** + * enum rtrs_clt_state - Client states. + */ +enum rtrs_clt_state { + RTRS_CLT_CONNECTING, + RTRS_CLT_CONNECTING_ERR, + RTRS_CLT_RECONNECTING, + RTRS_CLT_CONNECTED, + RTRS_CLT_CLOSING, + RTRS_CLT_CLOSED, + RTRS_CLT_DEAD, +}; + +enum rtrs_mp_policy { + MP_POLICY_RR, + MP_POLICY_MIN_INFLIGHT, +}; + +/* see Documentation/ABI/testing/sysfs-class-rtrs-client for details */ +struct rtrs_clt_stats_reconnects { + int successful_cnt; + int fail_cnt; +}; + +/* see Documentation/ABI/testing/sysfs-class-rtrs-client for details */ +struct rtrs_clt_stats_cpu_migr { + atomic_t from; + int to; +}; + +/* stats for Read and write operation. + * see Documentation/ABI/testing/sysfs-class-rtrs-client for details + */ +struct rtrs_clt_stats_rdma { + struct { + u64 cnt; + u64 size_total; + } dir[2]; + + u64 failover_cnt; +}; + +struct rtrs_clt_stats_pcpu { + struct rtrs_clt_stats_cpu_migr cpu_migr; + struct rtrs_clt_stats_rdma rdma; +}; + +struct rtrs_clt_stats { + struct kobject kobj_stats; + struct rtrs_clt_stats_pcpu __percpu *pcpu_stats; + struct rtrs_clt_stats_reconnects reconnects; + atomic_t inflight; +}; + +struct rtrs_clt_con { + struct rtrs_con c; + struct rtrs_iu *rsp_ius; + u32 queue_size; + unsigned int cpu; + atomic_t io_cnt; + int cm_err; +}; + +/** + * rtrs_permit - permits the memory allocation for future RDMA operation. + * Combine with irq pinning to keep IO on same CPU. + */ +struct rtrs_permit { + enum rtrs_clt_con_type con_type; + unsigned int cpu_id; + unsigned int mem_id; + unsigned int mem_off; +}; + +/** + * rtrs_clt_io_req - describes one inflight IO request + */ +struct rtrs_clt_io_req { + struct list_head list; + struct rtrs_iu *iu; + struct scatterlist *sglist; /* list holding user data */ + unsigned int sg_cnt; + unsigned int sg_size; + unsigned int data_len; + unsigned int usr_len; + void *priv; + bool in_use; + struct rtrs_clt_con *con; + struct rtrs_sg_desc *desc; + struct ib_sge *sge; + struct rtrs_permit *permit; + enum dma_data_direction dir; + void (*conf)(void *priv, int errno); + unsigned long start_jiffies; + + struct ib_mr *mr; + struct ib_cqe inv_cqe; + struct completion inv_comp; + int inv_errno; + bool need_inv_comp; + bool need_inv; +}; + +struct rtrs_rbuf { + u64 addr; + u32 rkey; +}; + +struct rtrs_clt_sess { + struct rtrs_sess s; + struct rtrs_clt *clt; + wait_queue_head_t state_wq; + enum rtrs_clt_state state; + atomic_t connected_cnt; + struct mutex init_mutex; + struct rtrs_clt_io_req *reqs; + struct delayed_work reconnect_dwork; + struct work_struct close_work; + unsigned int reconnect_attempts; + bool established; + struct rtrs_rbuf *rbufs; + size_t max_io_size; + u32 max_hdr_size; + u32 chunk_size; + size_t queue_depth; + u32 max_pages_per_mr; + int max_send_sge; + u32 flags; + struct kobject kobj; + struct rtrs_clt_stats *stats; + /* cache hca_port and hca_name to display in sysfs */ + u8 hca_port; + char hca_name[IB_DEVICE_NAME_MAX]; + struct list_head __percpu + *mp_skip_entry; +}; + +struct rtrs_clt { + struct list_head paths_list; /* rcu protected list */ + size_t paths_num; + struct rtrs_clt_sess + __rcu * __percpu *pcpu_path; + uuid_t paths_uuid; + int paths_up; + struct mutex paths_mutex; + struct mutex paths_ev_mutex; + char sessname[NAME_MAX]; + u16 port; + unsigned int max_reconnect_attempts; + unsigned int reconnect_delay_sec; + unsigned int max_segments; + void *permits; + unsigned long *permits_map; + size_t queue_depth; + size_t max_io_size; + wait_queue_head_t permits_wait; + size_t pdu_sz; + void *priv; + void (*link_ev)(void *priv, + enum rtrs_clt_link_ev ev); + struct device dev; + struct kobject *kobj_paths; + enum rtrs_mp_policy mp_policy; +}; + +static inline struct rtrs_clt_con *to_clt_con(struct rtrs_con *c) +{ + return container_of(c, struct rtrs_clt_con, c); +} + +static inline struct rtrs_clt_sess *to_clt_sess(struct rtrs_sess *s) +{ + return container_of(s, struct rtrs_clt_sess, s); +} + +static inline int permit_size(struct rtrs_clt *clt) +{ + return sizeof(struct rtrs_permit) + clt->pdu_sz; +} + +static inline struct rtrs_permit *get_permit(struct rtrs_clt *clt, int idx) +{ + return (struct rtrs_permit *)(clt->permits + permit_size(clt) * idx); +} + +int rtrs_clt_reconnect_from_sysfs(struct rtrs_clt_sess *sess); +int rtrs_clt_disconnect_from_sysfs(struct rtrs_clt_sess *sess); +int rtrs_clt_create_path_from_sysfs(struct rtrs_clt *clt, + struct rtrs_addr *addr); +int rtrs_clt_remove_path_from_sysfs(struct rtrs_clt_sess *sess, + const struct attribute *sysfs_self); + +void rtrs_clt_set_max_reconnect_attempts(struct rtrs_clt *clt, int value); +int rtrs_clt_get_max_reconnect_attempts(const struct rtrs_clt *clt); +void free_sess(struct rtrs_clt_sess *sess); + +/* rtrs-clt-stats.c */ + +int rtrs_clt_init_stats(struct rtrs_clt_stats *stats); + +void rtrs_clt_inc_failover_cnt(struct rtrs_clt_stats *s); + +void rtrs_clt_update_wc_stats(struct rtrs_clt_con *con); +void rtrs_clt_update_all_stats(struct rtrs_clt_io_req *req, int dir); + +int rtrs_clt_reset_rdma_lat_distr_stats(struct rtrs_clt_stats *stats, + bool enable); +ssize_t rtrs_clt_stats_rdma_lat_distr_to_str(struct rtrs_clt_stats *stats, + char *page, size_t len); +int rtrs_clt_reset_cpu_migr_stats(struct rtrs_clt_stats *stats, bool enable); +int rtrs_clt_stats_migration_cnt_to_str(struct rtrs_clt_stats *stats, char *buf, + size_t len); +int rtrs_clt_reset_reconnects_stat(struct rtrs_clt_stats *stats, bool enable); +int rtrs_clt_stats_reconnects_to_str(struct rtrs_clt_stats *stats, char *buf, + size_t len); +int rtrs_clt_reset_wc_comp_stats(struct rtrs_clt_stats *stats, bool enable); +int rtrs_clt_stats_wc_completion_to_str(struct rtrs_clt_stats *stats, char *buf, + size_t len); +int rtrs_clt_reset_rdma_stats(struct rtrs_clt_stats *stats, bool enable); +ssize_t rtrs_clt_stats_rdma_to_str(struct rtrs_clt_stats *stats, + char *page, size_t len); +int rtrs_clt_reset_all_stats(struct rtrs_clt_stats *stats, bool enable); +ssize_t rtrs_clt_reset_all_help(struct rtrs_clt_stats *stats, + char *page, size_t len); + +/* rtrs-clt-sysfs.c */ + +int rtrs_clt_create_sysfs_root_files(struct rtrs_clt *clt); +void rtrs_clt_destroy_sysfs_root_folders(struct rtrs_clt *clt); +void rtrs_clt_destroy_sysfs_root_files(struct rtrs_clt *clt); + +int rtrs_clt_create_sess_files(struct rtrs_clt_sess *sess); +void rtrs_clt_destroy_sess_files(struct rtrs_clt_sess *sess, + const struct attribute *sysfs_self); + +#endif /* RTRS_CLT_H */