From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:28714 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755133AbcFQBVg (ORCPT ); Thu, 16 Jun 2016 21:21:36 -0400 Subject: [PATCH 034/119] xfs: teach rmapbt to support interval queries From: "Darrick J. Wong" To: david@fromorbit.com, darrick.wong@oracle.com Cc: linux-fsdevel@vger.kernel.org, vishal.l.verma@intel.com, xfs@oss.sgi.com Date: Thu, 16 Jun 2016 18:21:30 -0700 Message-ID: <146612649050.12839.2803288971604662823.stgit@birch.djwong.org> In-Reply-To: <146612627129.12839.3827886950949809165.stgit@birch.djwong.org> References: <146612627129.12839.3827886950949809165.stgit@birch.djwong.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Now that the generic btree code supports querying all records within a range of keys, use that functionality to allow us to ask for all the extents mapped to a range of physical blocks. v2: Move unwritten bit to rm_offset. Signed-off-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_rmap.c | 43 ++++++++++++++++++++++++++++++++++++++++ fs/xfs/libxfs/xfs_rmap_btree.h | 9 ++++++++ 2 files changed, 52 insertions(+) diff --git a/fs/xfs/libxfs/xfs_rmap.c b/fs/xfs/libxfs/xfs_rmap.c index c6a5a0b..0e1721a 100644 --- a/fs/xfs/libxfs/xfs_rmap.c +++ b/fs/xfs/libxfs/xfs_rmap.c @@ -184,3 +184,46 @@ out_error: trace_xfs_rmap_alloc_extent_error(mp, agno, bno, len, false, oinfo); return error; } + +struct xfs_rmapbt_query_range_info { + xfs_rmapbt_query_range_fn fn; + void *priv; +}; + +/* Format btree record and pass to our callback. */ +STATIC int +xfs_rmapbt_query_range_helper( + struct xfs_btree_cur *cur, + union xfs_btree_rec *rec, + void *priv) +{ + struct xfs_rmapbt_query_range_info *query = priv; + struct xfs_rmap_irec irec; + int error; + + error = xfs_rmapbt_btrec_to_irec(rec, &irec); + if (error) + return error; + return query->fn(cur, &irec, query->priv); +} + +/* Find all rmaps between two keys. */ +int +xfs_rmapbt_query_range( + struct xfs_btree_cur *cur, + struct xfs_rmap_irec *low_rec, + struct xfs_rmap_irec *high_rec, + xfs_rmapbt_query_range_fn fn, + void *priv) +{ + union xfs_btree_irec low_brec; + union xfs_btree_irec high_brec; + struct xfs_rmapbt_query_range_info query; + + low_brec.r = *low_rec; + high_brec.r = *high_rec; + query.priv = priv; + query.fn = fn; + return xfs_btree_query_range(cur, &low_brec, &high_brec, + xfs_rmapbt_query_range_helper, &query); +} diff --git a/fs/xfs/libxfs/xfs_rmap_btree.h b/fs/xfs/libxfs/xfs_rmap_btree.h index 796071c..e926c6e 100644 --- a/fs/xfs/libxfs/xfs_rmap_btree.h +++ b/fs/xfs/libxfs/xfs_rmap_btree.h @@ -74,4 +74,13 @@ int xfs_rmap_free(struct xfs_trans *tp, struct xfs_buf *agbp, xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len, struct xfs_owner_info *oinfo); +typedef int (*xfs_rmapbt_query_range_fn)( + struct xfs_btree_cur *cur, + struct xfs_rmap_irec *rec, + void *priv); + +int xfs_rmapbt_query_range(struct xfs_btree_cur *cur, + struct xfs_rmap_irec *low_rec, struct xfs_rmap_irec *high_rec, + xfs_rmapbt_query_range_fn fn, void *priv); + #endif /* __XFS_RMAP_BTREE_H__ */