From patchwork Sun Jan 6 22:14:17 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Simmons X-Patchwork-Id: 10749753 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A671391E for ; Sun, 6 Jan 2019 22:16:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 98D9C28957 for ; Sun, 6 Jan 2019 22:16:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8CDD128965; Sun, 6 Jan 2019 22:16:21 +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=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from pdx1-mailman02.dreamhost.com (pdx1-mailman02.dreamhost.com [64.90.62.194]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 4633228957 for ; Sun, 6 Jan 2019 22:16:21 +0000 (UTC) Received: from pdx1-mailman02.dreamhost.com (localhost [IPv6:::1]) by pdx1-mailman02.dreamhost.com (Postfix) with ESMTP id C0CA7681F3B; Sun, 6 Jan 2019 14:15:23 -0800 (PST) X-Original-To: lustre-devel@lists.lustre.org Delivered-To: lustre-devel-lustre.org@pdx1-mailman02.dreamhost.com Received: from smtp4.ccs.ornl.gov (smtp4.ccs.ornl.gov [160.91.203.40]) by pdx1-mailman02.dreamhost.com (Postfix) with ESMTP id 8F2A121F90D for ; Sun, 6 Jan 2019 14:14:39 -0800 (PST) Received: from star.ccs.ornl.gov (star.ccs.ornl.gov [160.91.202.134]) by smtp4.ccs.ornl.gov (Postfix) with ESMTP id C8B501005165; Sun, 6 Jan 2019 17:14:30 -0500 (EST) Received: by star.ccs.ornl.gov (Postfix, from userid 2004) id C7886BB; Sun, 6 Jan 2019 17:14:30 -0500 (EST) From: James Simmons To: Andreas Dilger , Oleg Drokin , NeilBrown Date: Sun, 6 Jan 2019 17:14:17 -0500 Message-Id: <1546812868-11794-23-git-send-email-jsimmons@infradead.org> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1546812868-11794-1-git-send-email-jsimmons@infradead.org> References: <1546812868-11794-1-git-send-email-jsimmons@infradead.org> Subject: [lustre-devel] [PATCH v2 22/33] lustre: lov: keep minimum LOVEA size X-BeenThere: lustre-devel@lists.lustre.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "For discussing Lustre software development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bobi Jam , Lustre Development List MIME-Version: 1.0 Errors-To: lustre-devel-bounces@lists.lustre.org Sender: "lustre-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Bobi Jam For a PFL file, some of its component could be un-instantiated, and their lov_ost_data_v1 array is not needed, we should keep its LOVEA as small as possible. An unstantiated component's stripe offset should be set. Signed-off-by: Bobi Jam WC-bug-id: https://jira.whamcloud.com/browse/LU-9489 Reviewed-on: https://review.whamcloud.com/27089 WC-bug-id: https://jira.whamcloud.com/browse/LU-9941 Reviewed-on: https://review.whamcloud.com/28845 Reviewed-by: Jinshan Xiong Reviewed-by: Fan Yong Reviewed-by: Oleg Drokin Reviewed-by: Andreas Dilger Signed-off-by: James Simmons --- drivers/staging/lustre/lustre/lov/lov_internal.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/staging/lustre/lustre/lov/lov_internal.h b/drivers/staging/lustre/lustre/lov/lov_internal.h index 5e3eae7..dd4dd24 100644 --- a/drivers/staging/lustre/lustre/lov/lov_internal.h +++ b/drivers/staging/lustre/lustre/lov/lov_internal.h @@ -96,6 +96,11 @@ static inline bool lsm_entry_inited(const struct lov_stripe_md *lsm, int index) return lsme_inited(lsm->lsm_entries[index]); } +static inline bool lsm_is_composite(u32 magic) +{ + return magic == LOV_MAGIC_COMP_V1; +} + static inline size_t lov_comp_md_size(const struct lov_stripe_md *lsm) { struct lov_stripe_md_entry *lsme; @@ -110,8 +115,15 @@ static inline size_t lov_comp_md_size(const struct lov_stripe_md *lsm) size = sizeof(struct lov_comp_md_v1); for (entry = 0; entry < lsm->lsm_entry_count; entry++) { + u16 stripe_count; + lsme = lsm->lsm_entries[entry]; + if (lsme_inited(lsme)) + stripe_count = lsme->lsme_stripe_count; + else + stripe_count = 0; + size += sizeof(*lsme); size += lov_mds_md_size(lsme->lsme_stripe_count, lsme->lsme_magic);