From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org
Subject: [PATCH 03/15] xfs: add scrub cross-referencing helpers for the rmap btrees
Date: Wed, 13 Dec 2017 15:56:41 -0800 [thread overview]
Message-ID: <151320940094.30154.1283303553948424575.stgit@magnolia> (raw)
In-Reply-To: <151320938254.30154.1046660005648421683.stgit@magnolia>
From: Darrick J. Wong <darrick.wong@oracle.com>
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 <darrick.wong@oracle.com>
---
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 50db920..ea78ec3 100644
--- a/fs/xfs/libxfs/xfs_rmap.c
+++ b/fs/xfs/libxfs/xfs_rmap.c
@@ -2387,3 +2387,61 @@ 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 0fcd5b1..380e53b 100644
--- a/fs/xfs/libxfs/xfs_rmap.h
+++ b/fs/xfs/libxfs/xfs_rmap.h
@@ -233,5 +233,10 @@ 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__ */
next prev parent reply other threads:[~2017-12-13 23:59 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-13 23:56 [PATCH v10.1 00/15] xfs: online scrub xref support Darrick J. Wong
2017-12-13 23:56 ` [PATCH 01/15] xfs: add scrub cross-referencing helpers for the free space btrees Darrick J. Wong
2017-12-13 23:56 ` [PATCH 02/15] xfs: add scrub cross-referencing helpers for the inode btrees Darrick J. Wong
2017-12-13 23:56 ` Darrick J. Wong [this message]
2017-12-13 23:56 ` [PATCH 04/15] xfs: add scrub cross-referencing helpers for the refcount btrees Darrick J. Wong
2017-12-13 23:56 ` [PATCH 05/15] xfs: set up scrub cross-referencing helpers Darrick J. Wong
2017-12-13 23:56 ` [PATCH 06/15] xfs: check btree block ownership with bnobt/rmapbt when scrubbing btree Darrick J. Wong
2017-12-13 23:57 ` [PATCH 07/15] xfs: introduce scrubber cross-referencing stubs Darrick J. Wong
2017-12-13 23:57 ` [PATCH 08/15] xfs: cross-reference with the bnobt Darrick J. Wong
2017-12-13 23:57 ` [PATCH 09/15] xfs: cross-reference bnobt records with cntbt Darrick J. Wong
2017-12-13 23:57 ` [PATCH 10/15] xfs: cross-reference inode btrees during scrub Darrick J. Wong
2017-12-13 23:57 ` [PATCH 11/15] xfs: cross-reference reverse-mapping btree Darrick J. Wong
2017-12-13 23:57 ` [PATCH 12/15] xfs: cross-reference the rmapbt data with the refcountbt Darrick J. Wong
2017-12-13 23:57 ` [PATCH 13/15] xfs: cross-reference refcount btree during scrub Darrick J. Wong
2017-12-13 23:57 ` [PATCH 14/15] xfs: cross-reference the realtime bitmap Darrick J. Wong
2017-12-13 23:57 ` [PATCH 15/15] xfs: cross-reference the block mappings when possible Darrick J. Wong
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