From patchwork Mon Nov 22 17:12:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Bogdanov X-Patchwork-Id: 12935708 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D108EC3F6B0 for ; Wed, 3 Aug 2022 16:30:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238448AbiHCQaR (ORCPT ); Wed, 3 Aug 2022 12:30:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51266 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238437AbiHCQ3t (ORCPT ); Wed, 3 Aug 2022 12:29:49 -0400 Received: from mta-01.yadro.com (mta-02.yadro.com [89.207.88.252]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 90A64491C8; Wed, 3 Aug 2022 09:29:47 -0700 (PDT) Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 26D0B4132C; Wed, 3 Aug 2022 16:29:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received:received; s= mta-01; t=1659544184; x=1661358585; bh=mSDTwFr55J6/EqbLfDIs9OFkW BeHO79zTZOG0+WN3Oo=; b=PiBl76ZR7OH9T5HSctQ0q7kghZmZid52y8A2gXWBG /tiOlWdWf1twIAqH+jlBoYhngCEjLJ3hDzZICRgXUjBrwaMFcapbVi1lvp+CgQba 5zHGjeFg7cme6umyMseUgTBOAR+iAC8wjk0WED9ty5OG7zbNwJOMEQqe7LoYC1vr lI= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VAJANPcnqkoC; Wed, 3 Aug 2022 19:29:44 +0300 (MSK) Received: from T-EXCH-01.corp.yadro.com (t-exch-01.corp.yadro.com [172.17.10.101]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id C284E412D0; Wed, 3 Aug 2022 19:29:21 +0300 (MSK) Received: from T-EXCH-08.corp.yadro.com (172.17.11.58) by T-EXCH-01.corp.yadro.com (172.17.10.101) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Wed, 3 Aug 2022 19:29:21 +0300 Received: from NB-591.corp.yadro.com (10.199.18.20) by T-EXCH-08.corp.yadro.com (172.17.11.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.1118.9; Wed, 3 Aug 2022 19:29:20 +0300 From: Dmitry Bogdanov To: Martin Petersen , CC: , , Dmitry Bogdanov Subject: [RFC PATCH 33/48] dlm_ckv: add key-value storage service Date: Mon, 22 Nov 2021 20:12:57 +0300 Message-ID: <20220803162857.27770-34-d.bogdanov@yadro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220803162857.27770-1-d.bogdanov@yadro.com> References: <20220803162857.27770-1-d.bogdanov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [10.199.18.20] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-08.corp.yadro.com (172.17.11.58) Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Simple key-value cluster storage. Signed-off-by: Dmitry Bogdanov --- drivers/target/dlm_ckv.c | 128 +++++++++++++++++++++++++++++++++++++++ drivers/target/dlm_ckv.h | 9 +++ 2 files changed, 137 insertions(+) diff --git a/drivers/target/dlm_ckv.c b/drivers/target/dlm_ckv.c index cffe4f2dcb82..22c5f0827595 100644 --- a/drivers/target/dlm_ckv.c +++ b/drivers/target/dlm_ckv.c @@ -25,6 +25,10 @@ struct dlm_ckv_lock { char name[DLM_RESNAME_MAXLEN]; }; +struct dlm_ckv_kv { + struct dlm_ckv_lock lock; +}; + struct dlm_ckv_bucket { dlm_lockspace_t *ls; struct kref refcount; @@ -240,6 +244,130 @@ dlm_ckv_lock_release(struct dlm_ckv_lock *ckv_lock) } EXPORT_SYMBOL(dlm_ckv_lock_release); +struct dlm_ckv_kv * +dlm_ckv_create_kv(struct dlm_ckv_bucket *bucket, const char *key) +{ + struct dlm_ckv_lock *ckv_lock; + void *ptr; + int res; + + ptr = kzalloc(DLM_CKV_LVB_SIZE, GFP_KERNEL); + if (!ptr) + return NULL; + + ckv_lock = dlm_ckv_create_lock(bucket, key); + if (!ckv_lock) + goto create_fail; + + ckv_lock->lksb.lksb.sb_lvbptr = ptr; + + res = dlm_ckv_lock_wait(ckv_lock->bucket->ls, DLM_LOCK_NL, + &ckv_lock->lksb, 0, ckv_lock->name, NULL); + if (res) + goto lock_failed; + + return (struct dlm_ckv_kv *)ckv_lock; + +lock_failed: + dlm_ckv_free_lock(ckv_lock); +create_fail: + kfree(ptr); + return NULL; +} +EXPORT_SYMBOL(dlm_ckv_create_kv); + +void +dlm_ckv_free_kv(struct dlm_ckv_kv *kv) +{ + struct dlm_ckv_bucket *bucket = kv->lock.bucket; + struct dlm_ckv_lock *ckv_lock = &kv->lock; + + dlm_ckv_unlock_wait(bucket->ls, &ckv_lock->lksb); + + kfree(ckv_lock->lksb.lksb.sb_lvbptr); + kfree(ckv_lock); + + kref_put(&bucket->refcount, bucket_release); + +} +EXPORT_SYMBOL(dlm_ckv_free_kv); + +int +dlm_ckv_get(struct dlm_ckv_kv *kv, char *value, size_t len) +{ + struct dlm_ckv_lock *ckv_lock = &kv->lock; + struct dlm_ckv_bucket *bucket; + int res; + + BUG_ON(!ckv_lock); + bucket = ckv_lock->bucket; + + res = dlm_ckv_lock_wait(ckv_lock->bucket->ls, DLM_LOCK_CR, + &ckv_lock->lksb, + DLM_LKF_VALBLK | DLM_LKF_CONVERT, + ckv_lock->name, NULL); + if (res) { + pr_info("Can not get lock %s, rc=%d\n", + ckv_lock->name, res); + goto fail; + } + + if (ckv_lock->lksb.lksb.sb_flags & DLM_SBF_VALNOTVALID) { + pr_info(" %s LVB was invalid\n", ckv_lock->name); + memset(value, 0, len); + } else + memcpy(value, ckv_lock->lksb.lksb.sb_lvbptr, len); + + res = dlm_ckv_lock_wait(ckv_lock->bucket->ls, DLM_LOCK_NL, + &ckv_lock->lksb, + DLM_LKF_CONVERT, + ckv_lock->name, NULL); + if (res) { + pr_info("Can not release lock %s\n", ckv_lock->name); + goto fail; + } + + return res; +fail: + return res; +} +EXPORT_SYMBOL(dlm_ckv_get); + +int +dlm_ckv_set(struct dlm_ckv_kv *kv, const char *value, size_t len) +{ + struct dlm_ckv_lock *ckv_lock = &kv->lock; + struct dlm_ckv_bucket *bucket; + int res; + + BUG_ON(!ckv_lock); + bucket = ckv_lock->bucket; + + res = dlm_ckv_lock_wait(ckv_lock->bucket->ls, DLM_LOCK_EX, + &ckv_lock->lksb, + DLM_LKF_CONVERT, + ckv_lock->name, NULL); + if (res) { + pr_info("Can not get lock %s\n", ckv_lock->name); + goto fail; + } + + memcpy(ckv_lock->lksb.lksb.sb_lvbptr, value, len); + res = dlm_ckv_lock_wait(ckv_lock->bucket->ls, DLM_LOCK_NL, + &ckv_lock->lksb, + DLM_LKF_VALBLK | DLM_LKF_CONVERT, + ckv_lock->name, NULL); + if (res) { + pr_info("Can not release lock %s\n", ckv_lock->name); + goto fail; + } + + return res; +fail: + return res; +} +EXPORT_SYMBOL(dlm_ckv_set); + static void dlm_cvk_pre_n_bast(void *astarg, int mode) { struct dlm_ckv_lksb *lksb = astarg; diff --git a/drivers/target/dlm_ckv.h b/drivers/target/dlm_ckv.h index 080d9498f5f9..c01904313f1e 100644 --- a/drivers/target/dlm_ckv.h +++ b/drivers/target/dlm_ckv.h @@ -4,6 +4,9 @@ struct dlm_ckv_bucket; struct dlm_ckv_lock; +struct dlm_ckv_kv; + +#define DLM_CKV_VALUE_MAX_SIZE 255 typedef void (*dlm_ckv_notify_cb)(void *userarg); @@ -18,6 +21,12 @@ void dlm_ckv_free_lock(struct dlm_ckv_lock *ckv_lock); int dlm_ckv_lock_get(struct dlm_ckv_lock *ckv_lock); int dlm_ckv_lock_release(struct dlm_ckv_lock *ckv_lock); +struct dlm_ckv_kv * +dlm_ckv_create_kv(struct dlm_ckv_bucket *bucket, const char *key); +void dlm_ckv_free_kv(struct dlm_ckv_kv *kv); +int dlm_ckv_get(struct dlm_ckv_kv *kv, char *value, size_t len); +int dlm_ckv_set(struct dlm_ckv_kv *kv, const char *value, size_t len); + struct dlm_ckv_notify * dlm_ckv_create_notification(struct dlm_ckv_bucket *bucket, const char *name, dlm_ckv_notify_cb cb);