From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:36400 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751613AbdK2BZo (ORCPT ); Tue, 28 Nov 2017 20:25:44 -0500 Received: from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id vAT1Phqp021192 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Wed, 29 Nov 2017 01:25:44 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id vAT1Ph7o019439 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Wed, 29 Nov 2017 01:25:43 GMT Received: from abhmp0001.oracle.com (abhmp0001.oracle.com [141.146.116.7]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id vAT1Ph9d025609 for ; Wed, 29 Nov 2017 01:25:43 GMT Subject: [PATCH 03/16] xfs: add scrub cross-referencing helpers for the rmap btrees From: "Darrick J. Wong" Date: Tue, 28 Nov 2017 17:25:42 -0800 Message-ID: <151191874246.8553.7530122656707019889.stgit@magnolia> In-Reply-To: <151191872395.8553.15627872818207535470.stgit@magnolia> References: <151191872395.8553.15627872818207535470.stgit@magnolia> 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: darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org From: Darrick J. Wong Add a couple of functions to the rmap btrees that will be used to cross-reference metadata against the rmapbt. Signed-off-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_rmap.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++ fs/xfs/libxfs/xfs_rmap.h | 5 ++++ 2 files changed, 63 insertions(+) diff --git a/fs/xfs/libxfs/xfs_rmap.c b/fs/xfs/libxfs/xfs_rmap.c index dd019ce..e4e971b 100644 --- a/fs/xfs/libxfs/xfs_rmap.c +++ b/fs/xfs/libxfs/xfs_rmap.c @@ -2334,3 +2334,61 @@ xfs_rmap_compare( else return 0; } + +/* Is there a record covering a given extent? */ +int +xfs_rmap_has_record( + struct xfs_btree_cur *cur, + xfs_agblock_t bno, + xfs_extlen_t len, + bool *exists) +{ + union xfs_btree_irec low; + union xfs_btree_irec high; + + memset(&low, 0, sizeof(low)); + low.r.rm_startblock = bno; + memset(&high, 0xFF, sizeof(high)); + high.r.rm_startblock = bno + len - 1; + + return xfs_btree_has_record(cur, &low, &high, exists); +} + +/* Is there a record covering a given extent? */ +int +xfs_rmap_record_exists( + struct xfs_btree_cur *cur, + xfs_agblock_t bno, + xfs_extlen_t len, + struct xfs_owner_info *oinfo, + bool *has_rmap) +{ + uint64_t owner; + uint64_t offset; + unsigned int flags; + int stat; + struct xfs_rmap_irec irec; + int error; + + xfs_owner_info_unpack(oinfo, &owner, &offset, &flags); + + error = xfs_rmap_lookup_le(cur, bno, len, owner, offset, flags, &stat); + if (error) + return error; + if (!stat) { + *has_rmap = false; + return 0; + } + + error = xfs_rmap_get_rec(cur, &irec, &stat); + if (error) + return error; + if (!stat) { + *has_rmap = false; + return 0; + } + + *has_rmap = (irec.rm_owner == owner && irec.rm_startblock <= bno && + irec.rm_startblock + irec.rm_blockcount >= bno + len); + return 0; +} diff --git a/fs/xfs/libxfs/xfs_rmap.h b/fs/xfs/libxfs/xfs_rmap.h index 466ede6..32c9382 100644 --- a/fs/xfs/libxfs/xfs_rmap.h +++ b/fs/xfs/libxfs/xfs_rmap.h @@ -219,5 +219,10 @@ int xfs_rmap_compare(const struct xfs_rmap_irec *a, union xfs_btree_rec; int xfs_rmap_btrec_to_irec(union xfs_btree_rec *rec, struct xfs_rmap_irec *irec); +int xfs_rmap_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno, + xfs_extlen_t len, bool *exists); +int xfs_rmap_record_exists(struct xfs_btree_cur *cur, xfs_agblock_t bno, + xfs_extlen_t len, struct xfs_owner_info *oinfo, + bool *has_rmap); #endif /* __XFS_RMAP_H__ */