From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:39106 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751058AbcKQXT0 (ORCPT ); Thu, 17 Nov 2016 18:19:26 -0500 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6DF224E4CB for ; Thu, 17 Nov 2016 23:19:16 +0000 (UTC) Received: from Liberator.example.com (ovpn03.gateway.prod.ext.phx2.redhat.com [10.5.9.3]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id uAHNJF3l023948 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 17 Nov 2016 18:19:16 -0500 From: Eric Sandeen Subject: [PATCH] xfs_db: add alignment filter to freesp command Message-ID: <1ed1ffd4-75e0-fa14-f812-b6ac4fd12987@redhat.com> Date: Thu, 17 Nov 2016 17:19:15 -0600 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: linux-xfs This adds an alignment filter to the xfs_db freesp command, i.e. xfs_db> freesp -A 4 will show only 4-block aligned free extents. This can be useful for finding freespace suitable for allocations with specific alignment requirements, such as inode allocation. Signed-off-by: Eric Sandeen --- diff --git a/db/freesp.c b/db/freesp.c index 27e9f5a..c3ca2f3 100644 --- a/db/freesp.c +++ b/db/freesp.c @@ -54,6 +54,7 @@ static int usage(void); static int agcount; static xfs_agnumber_t *aglist; +static int alignment; static int countflag; static int dumpflag; static int equalsize; @@ -67,7 +68,7 @@ static long long totexts; static const cmdinfo_t freesp_cmd = { "freesp", NULL, freesp_f, 0, -1, 0, - "[-bcdfs] [-a agno]... [-e binsize] [-h h1]... [-m binmult]", + "[-bcdfs] [-A alignment] [-a agno]... [-e binsize] [-h h1]... [-m binmult]", "summarize free space for filesystem", NULL }; static int @@ -147,8 +148,11 @@ init( totblocks = totexts = 0; aglist = NULL; hist = NULL; - while ((c = getopt(argc, argv, "a:bcde:h:m:s")) != EOF) { + while ((c = getopt(argc, argv, "A:a:bcde:h:m:s")) != EOF) { switch (c) { + case 'A': + alignment = atoi(optarg); + break; case 'a': aglistadd(optarg); break; @@ -372,6 +376,9 @@ addtohist( { int i; + if (alignment && (XFS_AGB_TO_FSB(mp,agno,agbno) % alignment)) + return; + if (dumpflag) dbprintf("%8d %8d %8d\n", agno, agbno, len); totexts++; diff --git a/man/man8/xfs_db.8 b/man/man8/xfs_db.8 index 460d89d..2c89769 100644 --- a/man/man8/xfs_db.8 +++ b/man/man8/xfs_db.8 @@ -512,12 +512,17 @@ enables processing of realtime control file data. enables processing of realtime file data. .RE .TP -.BI "freesp [\-bcds] [\-a " ag "] ... [\-e " i "] [\-h " h1 "] ... [\-m " m ] +.BI "freesp [\-bcds] [\-A " alignment "] [\-a " ag "] ... [\-e " i "] [\-h " h1 "] ... [\-m " m ] Summarize free space for the filesystem. The free blocks are examined and totalled, and displayed in the form of a histogram, with a count of extents in each range of free extent sizes. .RS 1.0i .TP 0.4i +.B \-A +reports only free extents with starting blocks aligned to +.I alignment +blocks. +.TP .B \-a adds .I ag