From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (Postfix) with ESMTP id AF5827F47 for ; Thu, 24 Jul 2014 09:23:13 -0500 (CDT) Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by relay3.corp.sgi.com (Postfix) with ESMTP id 4CD22AC009 for ; Thu, 24 Jul 2014 07:23:13 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id Ld5VciELc0zUwCE4 (version=TLSv1 cipher=AES256-SHA bits=256 verify=NO) for ; Thu, 24 Jul 2014 07:23:12 -0700 (PDT) Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s6OENA0E016643 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Thu, 24 Jul 2014 10:23:11 -0400 Received: from bfoster.bfoster ([10.18.41.237]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s6OENA44017006 for ; Thu, 24 Jul 2014 10:23:10 -0400 From: Brian Foster Subject: [PATCH 08/18] xfs: create helper to manage record overlap for sparse inode chunks Date: Thu, 24 Jul 2014 10:22:58 -0400 Message-Id: <1406211788-63206-9-git-send-email-bfoster@redhat.com> In-Reply-To: <1406211788-63206-1-git-send-email-bfoster@redhat.com> References: <1406211788-63206-1-git-send-email-bfoster@redhat.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com Create xfs_spchunk_has_record() to receive the parameters of a new sparse inode chunk allocation and identify whether a record exists that is capable of tracking this sparse chunk. Signed-off-by: Brian Foster --- fs/xfs/libxfs/xfs_ialloc.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c index 27d3437..be57b51 100644 --- a/fs/xfs/libxfs/xfs_ialloc.c +++ b/fs/xfs/libxfs/xfs_ialloc.c @@ -351,6 +351,61 @@ xfs_ialloc_inode_init( } /* + * Determine whether part of a sparse inode chunk that has just been allocated + * is covered by an existing inobt record. + */ +STATIC int +xfs_spchunk_has_record( + struct xfs_mount *mp, + struct xfs_trans *tp, + struct xfs_buf *agbp, + xfs_agino_t newino, + xfs_agino_t count, + xfs_btnum_t btnum, + struct xfs_inobt_rec_incore *orec) +{ + struct xfs_btree_cur *cur; + struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp); + xfs_agnumber_t agno = be32_to_cpu(agi->agi_seqno); + xfs_agino_t previno; + int error; + int i; + struct xfs_inobt_rec_incore rec; + + orec->ir_startino = NULLAGINO; + + cur = xfs_inobt_init_cursor(mp, tp, agbp, agno, btnum); + + previno = newino + count - XFS_INODES_PER_CHUNK; + error = xfs_inobt_lookup(cur, previno, XFS_LOOKUP_GE, &i); + if (error) + goto error; + if (i == 0) + goto out; + + error = xfs_inobt_get_rec(cur, &rec, &i); + if (error) + goto error; + XFS_WANT_CORRUPTED_GOTO(i == 1, error); + + if (rec.ir_startino > newino) + goto out; + + ASSERT(rec.ir_startino <= newino && + rec.ir_startino + XFS_INODES_PER_CHUNK > newino); + ASSERT(rec.ir_freecount + count <= XFS_INODES_PER_CHUNK); + + *orec = rec; + +out: + xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); + return 0; +error: + xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); + return error; +} + +/* * Allocate new inodes in the allocation group specified by agbp. * Return 0 for success, else error code. */ -- 1.8.3.1 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs