From patchwork Thu Nov 18 23:13:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Chinner X-Patchwork-Id: 12627947 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9290BC43217 for ; Thu, 18 Nov 2021 23:13:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6603F61A86 for ; Thu, 18 Nov 2021 23:13:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233055AbhKRXQ5 (ORCPT ); Thu, 18 Nov 2021 18:16:57 -0500 Received: from mail105.syd.optusnet.com.au ([211.29.132.249]:44750 "EHLO mail105.syd.optusnet.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233023AbhKRXQ4 (ORCPT ); Thu, 18 Nov 2021 18:16:56 -0500 Received: from dread.disaster.area (pa49-195-103-97.pa.nsw.optusnet.com.au [49.195.103.97]) by mail105.syd.optusnet.com.au (Postfix) with ESMTPS id B7FF7105E6BE for ; Fri, 19 Nov 2021 10:13:54 +1100 (AEDT) Received: from discord.disaster.area ([192.168.253.110]) by dread.disaster.area with esmtp (Exim 4.92.3) (envelope-from ) id 1mnqbJ-00ATgy-Jl for linux-xfs@vger.kernel.org; Fri, 19 Nov 2021 10:13:53 +1100 Received: from dave by discord.disaster.area with local (Exim 4.95) (envelope-from ) id 1mnqbJ-008bol-Hx for linux-xfs@vger.kernel.org; Fri, 19 Nov 2021 10:13:53 +1100 From: Dave Chinner To: linux-xfs@vger.kernel.org Subject: [PATCH 01/16] xfs: factor out the CIL transaction header building Date: Fri, 19 Nov 2021 10:13:37 +1100 Message-Id: <20211118231352.2051947-2-david@fromorbit.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211118231352.2051947-1-david@fromorbit.com> References: <20211118231352.2051947-1-david@fromorbit.com> MIME-Version: 1.0 X-Optus-CM-Score: 0 X-Optus-CM-Analysis: v=2.4 cv=VuxAv86n c=1 sm=1 tr=0 ts=6196de32 a=fP9RlOTWD4uZJjPSFnn6Ew==:117 a=fP9RlOTWD4uZJjPSFnn6Ew==:17 a=vIxV3rELxO4A:10 a=20KFwNOVAAAA:8 a=VwQbUJbxAAAA:8 a=xMttu46VdFABuZTklvgA:9 a=AjGcO6oz07-iQ99wixmX:22 Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org From: Dave Chinner It is static code deep in the middle of the CIL push logic. Factor it out into a helper so that it is clear and easy to modify separately. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Reviewed-by: Brian Foster Reviewed-by: Chandan Babu R --- fs/xfs/xfs_log_cil.c | 61 ++++++++++++++++++++++++++++---------------- 1 file changed, 39 insertions(+), 22 deletions(-) diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c index 6c93c8ada6f3..28f8104fbef1 100644 --- a/fs/xfs/xfs_log_cil.c +++ b/fs/xfs/xfs_log_cil.c @@ -834,6 +834,41 @@ xlog_cil_write_commit_record( return error; } +struct xlog_cil_trans_hdr { + struct xfs_trans_header thdr; + struct xfs_log_iovec lhdr; +}; + +/* + * Build a checkpoint transaction header to begin the journal transaction. We + * need to account for the space used by the transaction header here as it is + * not accounted for in xlog_write(). + */ +static void +xlog_cil_build_trans_hdr( + struct xfs_cil_ctx *ctx, + struct xlog_cil_trans_hdr *hdr, + struct xfs_log_vec *lvhdr, + int num_iovecs) +{ + struct xlog_ticket *tic = ctx->ticket; + + memset(hdr, 0, sizeof(*hdr)); + + hdr->thdr.th_magic = XFS_TRANS_HEADER_MAGIC; + hdr->thdr.th_type = XFS_TRANS_CHECKPOINT; + hdr->thdr.th_tid = tic->t_tid; + hdr->thdr.th_num_items = num_iovecs; + hdr->lhdr.i_addr = &hdr->thdr; + hdr->lhdr.i_len = sizeof(xfs_trans_header_t); + hdr->lhdr.i_type = XLOG_REG_TYPE_TRANSHDR; + tic->t_curr_res -= hdr->lhdr.i_len + sizeof(struct xlog_op_header); + + lvhdr->lv_niovecs = 1; + lvhdr->lv_iovecp = &hdr->lhdr; + lvhdr->lv_next = ctx->lv_chain; +} + /* * Push the Committed Item List to the log. * @@ -858,11 +893,9 @@ xlog_cil_push_work( struct xlog *log = cil->xc_log; struct xfs_log_vec *lv; struct xfs_cil_ctx *new_ctx; - struct xlog_ticket *tic; int num_iovecs; int error = 0; - struct xfs_trans_header thdr; - struct xfs_log_iovec lhdr; + struct xlog_cil_trans_hdr thdr; struct xfs_log_vec lvhdr = { NULL }; xfs_lsn_t preflush_tail_lsn; xfs_csn_t push_seq; @@ -1011,24 +1044,8 @@ xlog_cil_push_work( * Build a checkpoint transaction header and write it to the log to * begin the transaction. We need to account for the space used by the * transaction header here as it is not accounted for in xlog_write(). - * - * The LSN we need to pass to the log items on transaction commit is - * the LSN reported by the first log vector write. If we use the commit - * record lsn then we can move the tail beyond the grant write head. */ - tic = ctx->ticket; - thdr.th_magic = XFS_TRANS_HEADER_MAGIC; - thdr.th_type = XFS_TRANS_CHECKPOINT; - thdr.th_tid = tic->t_tid; - thdr.th_num_items = num_iovecs; - lhdr.i_addr = &thdr; - lhdr.i_len = sizeof(xfs_trans_header_t); - lhdr.i_type = XLOG_REG_TYPE_TRANSHDR; - tic->t_curr_res -= lhdr.i_len + sizeof(xlog_op_header_t); - - lvhdr.lv_niovecs = 1; - lvhdr.lv_iovecp = &lhdr; - lvhdr.lv_next = ctx->lv_chain; + xlog_cil_build_trans_hdr(ctx, &thdr, &lvhdr, num_iovecs); /* * Before we format and submit the first iclog, we have to ensure that @@ -1044,7 +1061,7 @@ xlog_cil_push_work( if (error) goto out_abort_free_ticket; - xfs_log_ticket_ungrant(log, tic); + xfs_log_ticket_ungrant(log, ctx->ticket); /* * If the checkpoint spans multiple iclogs, wait for all previous iclogs @@ -1108,7 +1125,7 @@ xlog_cil_push_work( return; out_abort_free_ticket: - xfs_log_ticket_ungrant(log, tic); + xfs_log_ticket_ungrant(log, ctx->ticket); ASSERT(xlog_is_shutdown(log)); if (!ctx->commit_iclog) { xlog_cil_committed(ctx);