From patchwork Mon Sep 18 15:24:15 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 9956939 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 3BE92601E9 for ; Mon, 18 Sep 2017 15:24:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2C53028A9B for ; Mon, 18 Sep 2017 15:24:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2136728AA1; Mon, 18 Sep 2017 15:24:40 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 35B6328B4C for ; Mon, 18 Sep 2017 15:24:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753116AbdIRPYi (ORCPT ); Mon, 18 Sep 2017 11:24:38 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:54367 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752786AbdIRPY3 (ORCPT ); Mon, 18 Sep 2017 11:24:29 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:To:From:Sender:Reply-To:Cc:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=kAgdVKNIz3CTzww6jbuUfBRGknITmoxOdIxwyv6Rga0=; b=nm7A1HcfLSFVpCrD5n8OQ6pjO VeDGshnZE4en9k6neGbkrqVmjGnJrllFVpcuEsz0UU7DtOZhlZZFx8a8LeeIW/FF4jmeQPdrwugSc bwd3pGpR8/MQpXutUNUiV3eJVmmHrCp75KNphyXMlMcyE9e/f2yVkXchOtopLl+qPl0GkQ7XFlSL6 YHdVjE6jUQlwQAQXgr8hSyBFVvnjUTjRW1UnQu4eftl9lHe7GyZSlnq3ilWpFS9H3G0a0GAYx/kMq lDJs0oPFDjMlYGhKA4sTdnUCKRq8pHF/PKkYBFcfAKEtzfQxJt4hZe0ykLOOXzttDLnjleX5Yy0Py nEqU2mGmg==; Received: from [107.17.164.65] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.87 #1 (Red Hat Linux)) id 1dtxuP-0005ER-2N for linux-xfs@vger.kernel.org; Mon, 18 Sep 2017 15:24:29 +0000 From: Christoph Hellwig To: linux-xfs@vger.kernel.org Subject: [PATCH 12/19] xfs: refactor xfs_bmap_add_extent_delay_real Date: Mon, 18 Sep 2017 08:24:15 -0700 Message-Id: <20170918152422.24345-13-hch@lst.de> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20170918152422.24345-1-hch@lst.de> References: <20170918152422.24345-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Use xfs_iext_get_extent to find, and xfs_iext_update_extent to update entries in the in-core extent list. This isolates the function from the detailed layout of the extent list, and generally makes the code a lot more readable. Signed-off-by: Christoph Hellwig --- fs/xfs/libxfs/xfs_bmap.c | 181 +++++++++++++++++++++++++---------------------- 1 file changed, 95 insertions(+), 86 deletions(-) diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 4fb73c0aca05..731854cc8b58 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -1588,7 +1588,6 @@ xfs_bmap_add_extent_delay_real( { struct xfs_bmbt_irec *new = &bma->got; int diff; /* temp value */ - xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ int error; /* error return value */ int i; /* temp state */ xfs_ifork_t *ifp; /* inode fork pointer */ @@ -1600,10 +1599,10 @@ xfs_bmap_add_extent_delay_real( xfs_filblks_t da_new; /* new count del alloc blocks used */ xfs_filblks_t da_old; /* old count del alloc blocks used */ xfs_filblks_t temp=0; /* value for da_new calculations */ - xfs_filblks_t temp2=0;/* value for da_new calculations */ int tmp_rval; /* partial logging flags */ struct xfs_mount *mp; xfs_extnum_t *nextents; + struct xfs_bmbt_irec old; mp = bma->ip->i_mount; ifp = XFS_IFORK_PTR(bma->ip, whichfork); @@ -1629,9 +1628,9 @@ xfs_bmap_add_extent_delay_real( /* * Set up a bunch of variables to make the tests simpler. */ - ep = xfs_iext_get_ext(ifp, bma->idx); - xfs_bmbt_get_all(ep, &PREV); + xfs_iext_get_extent(ifp, bma->idx, &PREV); new_endoff = new->br_startoff + new->br_blockcount; + ASSERT(isnullstartblock(PREV.br_startblock)); ASSERT(PREV.br_startoff <= new->br_startoff); ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); @@ -1706,9 +1705,8 @@ xfs_bmap_add_extent_delay_real( */ bma->idx--; trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); - xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), - LEFT.br_blockcount + PREV.br_blockcount + - RIGHT.br_blockcount); + LEFT.br_blockcount += PREV.br_blockcount + RIGHT.br_blockcount; + xfs_iext_update_extent(ifp, bma->idx, &LEFT); trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); xfs_iext_remove(bma->ip, bma->idx + 1, 2, state); @@ -1733,9 +1731,7 @@ xfs_bmap_add_extent_delay_real( XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, LEFT.br_startblock, - LEFT.br_blockcount + - PREV.br_blockcount + - RIGHT.br_blockcount, LEFT.br_state); + LEFT.br_blockcount, LEFT.br_state); if (error) goto done; } @@ -1748,9 +1744,10 @@ xfs_bmap_add_extent_delay_real( */ bma->idx--; + old = LEFT; trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); - xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), - LEFT.br_blockcount + PREV.br_blockcount); + LEFT.br_blockcount += PREV.br_blockcount; + xfs_iext_update_extent(ifp, bma->idx, &LEFT); trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); @@ -1758,16 +1755,15 @@ xfs_bmap_add_extent_delay_real( rval = XFS_ILOG_DEXT; else { rval = 0; - error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, - LEFT.br_startblock, LEFT.br_blockcount, + error = xfs_bmbt_lookup_eq(bma->cur, old.br_startoff, + old.br_startblock, old.br_blockcount, &i); if (error) goto done; XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, LEFT.br_startblock, - LEFT.br_blockcount + - PREV.br_blockcount, LEFT.br_state); + LEFT.br_blockcount, LEFT.br_state); if (error) goto done; } @@ -1779,9 +1775,9 @@ xfs_bmap_add_extent_delay_real( * The right neighbor is contiguous, the left is not. */ trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); - xfs_bmbt_set_startblock(ep, new->br_startblock); - xfs_bmbt_set_blockcount(ep, - PREV.br_blockcount + RIGHT.br_blockcount); + PREV.br_startblock = new->br_startblock; + PREV.br_blockcount += RIGHT.br_blockcount; + xfs_iext_update_extent(ifp, bma->idx, &PREV); trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); @@ -1796,9 +1792,8 @@ xfs_bmap_add_extent_delay_real( goto done; XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); error = xfs_bmbt_update(bma->cur, PREV.br_startoff, - new->br_startblock, - PREV.br_blockcount + - RIGHT.br_blockcount, PREV.br_state); + PREV.br_startblock, + PREV.br_blockcount, PREV.br_state); if (error) goto done; } @@ -1811,8 +1806,9 @@ xfs_bmap_add_extent_delay_real( * the new one. */ trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); - xfs_bmbt_set_startblock(ep, new->br_startblock); - xfs_bmbt_set_state(ep, new->br_state); + PREV.br_startblock = new->br_startblock; + PREV.br_state = new->br_state; + xfs_iext_update_extent(ifp, bma->idx, &PREV); trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); (*nextents)++; @@ -1839,38 +1835,39 @@ xfs_bmap_add_extent_delay_real( * Filling in the first part of a previous delayed allocation. * The left neighbor is contiguous. */ + old = LEFT; + temp = PREV.br_blockcount - new->br_blockcount; + da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), + startblockval(PREV.br_startblock)); + trace_xfs_bmap_pre_update(bma->ip, bma->idx - 1, state, _THIS_IP_); - xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx - 1), - LEFT.br_blockcount + new->br_blockcount); - xfs_bmbt_set_startoff(ep, - PREV.br_startoff + new->br_blockcount); + LEFT.br_blockcount += new->br_blockcount; + xfs_iext_update_extent(ifp, bma->idx - 1, &LEFT); trace_xfs_bmap_post_update(bma->ip, bma->idx - 1, state, _THIS_IP_); - temp = PREV.br_blockcount - new->br_blockcount; trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); - xfs_bmbt_set_blockcount(ep, temp); + PREV.br_blockcount = temp = PREV.br_blockcount - new->br_blockcount; + PREV.br_startoff += new->br_blockcount; + PREV.br_startblock = nullstartblock(da_new); + xfs_iext_update_extent(ifp, bma->idx, &PREV); + trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); + if (bma->cur == NULL) rval = XFS_ILOG_DEXT; else { rval = 0; - error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, - LEFT.br_startblock, LEFT.br_blockcount, + error = xfs_bmbt_lookup_eq(bma->cur, old.br_startoff, + old.br_startblock, old.br_blockcount, &i); if (error) goto done; XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, - LEFT.br_startblock, - LEFT.br_blockcount + - new->br_blockcount, + LEFT.br_startblock, LEFT.br_blockcount, LEFT.br_state); if (error) goto done; } - da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), - startblockval(PREV.br_startblock)); - xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); - trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); bma->idx--; break; @@ -1880,10 +1877,6 @@ xfs_bmap_add_extent_delay_real( * Filling in the first part of a previous delayed allocation. * The left neighbor is not contiguous. */ - trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); - xfs_bmbt_set_startoff(ep, new_endoff); - temp = PREV.br_blockcount - new->br_blockcount; - xfs_bmbt_set_blockcount(ep, temp); xfs_iext_insert(bma->ip, bma->idx, 1, new, state); (*nextents)++; if (bma->cur == NULL) @@ -1911,12 +1904,19 @@ xfs_bmap_add_extent_delay_real( if (error) goto done; } + + temp = PREV.br_blockcount - new->br_blockcount; da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), startblockval(PREV.br_startblock) - (bma->cur ? bma->cur->bc_private.b.allocated : 0)); - ep = xfs_iext_get_ext(ifp, bma->idx + 1); - xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); + + trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_); + PREV.br_startoff = new_endoff; + PREV.br_blockcount = temp; + PREV.br_startblock = nullstartblock(da_new); + xfs_iext_update_extent(ifp, bma->idx + 1, &PREV); trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); + break; case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: @@ -1924,37 +1924,39 @@ xfs_bmap_add_extent_delay_real( * Filling in the last part of a previous delayed allocation. * The right neighbor is contiguous with the new allocation. */ - temp = PREV.br_blockcount - new->br_blockcount; + old = RIGHT; trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_); - xfs_bmbt_set_blockcount(ep, temp); - xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx + 1), - new->br_startoff, new->br_startblock, - new->br_blockcount + RIGHT.br_blockcount, - RIGHT.br_state); + RIGHT.br_startoff = new->br_startoff; + RIGHT.br_startblock = new->br_startblock; + RIGHT.br_blockcount += new->br_blockcount; + xfs_iext_update_extent(ifp, bma->idx + 1, &RIGHT); trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); + if (bma->cur == NULL) rval = XFS_ILOG_DEXT; else { rval = 0; - error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, - RIGHT.br_startblock, - RIGHT.br_blockcount, &i); + error = xfs_bmbt_lookup_eq(bma->cur, old.br_startoff, + old.br_startblock, + old.br_blockcount, &i); if (error) goto done; XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); - error = xfs_bmbt_update(bma->cur, new->br_startoff, - new->br_startblock, - new->br_blockcount + - RIGHT.br_blockcount, + error = xfs_bmbt_update(bma->cur, RIGHT.br_startoff, + RIGHT.br_startblock, RIGHT.br_blockcount, RIGHT.br_state); if (error) goto done; } + temp = PREV.br_blockcount - new->br_blockcount; da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), startblockval(PREV.br_startblock)); + trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); - xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); + PREV.br_blockcount = temp; + PREV.br_startblock = nullstartblock(da_new); + xfs_iext_update_extent(ifp, bma->idx, &PREV); trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); bma->idx++; @@ -1965,9 +1967,6 @@ xfs_bmap_add_extent_delay_real( * Filling in the last part of a previous delayed allocation. * The right neighbor is not contiguous. */ - temp = PREV.br_blockcount - new->br_blockcount; - trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); - xfs_bmbt_set_blockcount(ep, temp); xfs_iext_insert(bma->ip, bma->idx + 1, 1, new, state); (*nextents)++; if (bma->cur == NULL) @@ -1995,11 +1994,16 @@ xfs_bmap_add_extent_delay_real( if (error) goto done; } + + temp = PREV.br_blockcount - new->br_blockcount; da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), startblockval(PREV.br_startblock) - (bma->cur ? bma->cur->bc_private.b.allocated : 0)); - ep = xfs_iext_get_ext(ifp, bma->idx); - xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); + + trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); + PREV.br_startblock = nullstartblock(da_new); + PREV.br_blockcount = temp; + xfs_iext_update_extent(ifp, bma->idx, &PREV); trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); bma->idx++; @@ -2026,19 +2030,33 @@ xfs_bmap_add_extent_delay_real( * PREV @ idx LEFT RIGHT * inserted at idx + 1 */ - temp = new->br_startoff - PREV.br_startoff; - temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff; - trace_xfs_bmap_pre_update(bma->ip, bma->idx, 0, _THIS_IP_); - xfs_bmbt_set_blockcount(ep, temp); /* truncate PREV */ + old = PREV; + + /* LEFT is the new middle */ LEFT = *new; + + /* RIGHT is the new right */ RIGHT.br_state = PREV.br_state; - RIGHT.br_startblock = nullstartblock( - (int)xfs_bmap_worst_indlen(bma->ip, temp2)); RIGHT.br_startoff = new_endoff; - RIGHT.br_blockcount = temp2; + RIGHT.br_blockcount = + PREV.br_startoff + PREV.br_blockcount - new_endoff; + RIGHT.br_startblock = + nullstartblock(xfs_bmap_worst_indlen(bma->ip, + RIGHT.br_blockcount)); + + /* truncate PREV */ + trace_xfs_bmap_pre_update(bma->ip, bma->idx, 0, _THIS_IP_); + PREV.br_blockcount = new->br_startoff - PREV.br_startoff; + PREV.br_startblock = + nullstartblock(xfs_bmap_worst_indlen(bma->ip, + PREV.br_blockcount)); + xfs_iext_update_extent(ifp, bma->idx, &PREV); + trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); + /* insert LEFT (r[0]) and RIGHT (r[1]) at the same time */ xfs_iext_insert(bma->ip, bma->idx + 1, 2, &LEFT, state); (*nextents)++; + if (bma->cur == NULL) rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; else { @@ -2064,12 +2082,12 @@ xfs_bmap_add_extent_delay_real( if (error) goto done; } - temp = xfs_bmap_worst_indlen(bma->ip, temp); - temp2 = xfs_bmap_worst_indlen(bma->ip, temp2); - diff = (int)(temp + temp2 - - (startblockval(PREV.br_startblock) - - (bma->cur ? - bma->cur->bc_private.b.allocated : 0))); + + da_new = startblockval(PREV.br_blockcount) + + startblockval(RIGHT.br_blockcount); + diff = da_new - startblockval(old.br_startblock); + if (bma->cur) + diff += bma->cur->bc_private.b.allocated; if (diff > 0) { error = xfs_mod_fdblocks(bma->ip->i_mount, -((int64_t)diff), false); @@ -2078,16 +2096,7 @@ xfs_bmap_add_extent_delay_real( goto done; } - ep = xfs_iext_get_ext(ifp, bma->idx); - xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); - trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); - trace_xfs_bmap_pre_update(bma->ip, bma->idx + 2, state, _THIS_IP_); - xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, bma->idx + 2), - nullstartblock((int)temp2)); - trace_xfs_bmap_post_update(bma->ip, bma->idx + 2, state, _THIS_IP_); - bma->idx++; - da_new = temp + temp2; break; case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: