From: "Darrick J. Wong" <djwong@kernel.org>
To: djwong@kernel.org, david@fromorbit.com
Cc: linux-xfs@vger.kernel.org, chandan.babu@oracle.com, hch@lst.de
Subject: [PATCH 03/15] xfs: don't track firstrec/firstkey separately in xchk_btree
Date: Tue, 12 Oct 2021 16:32:50 -0700 [thread overview]
Message-ID: <163408157028.4151249.16573862981315637553.stgit@magnolia> (raw)
In-Reply-To: <163408155346.4151249.8364703447365270670.stgit@magnolia>
From: Darrick J. Wong <djwong@kernel.org>
The btree scrubbing code checks that the records (or keys) that it finds
in a btree block are all in order by calling the btree cursor's
->recs_inorder function. This of course makes no sense for the first
item in the block, so we switch that off with a separate variable in
struct xchk_btree.
Christoph helped me figure out that the variable is unnecessary, since
we just accessed bc_ptrs[level] and can compare that against zero. Use
that, and save ourselves some memory space.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
fs/xfs/scrub/btree.c | 11 +++--------
fs/xfs/scrub/btree.h | 2 --
2 files changed, 3 insertions(+), 10 deletions(-)
diff --git a/fs/xfs/scrub/btree.c b/fs/xfs/scrub/btree.c
index 26dcb4691e31..d5e1ca521fc4 100644
--- a/fs/xfs/scrub/btree.c
+++ b/fs/xfs/scrub/btree.c
@@ -141,9 +141,9 @@ xchk_btree_rec(
trace_xchk_btree_rec(bs->sc, cur, 0);
/* If this isn't the first record, are they in order? */
- if (!bs->firstrec && !cur->bc_ops->recs_inorder(cur, &bs->lastrec, rec))
+ if (cur->bc_ptrs[0] > 1 &&
+ !cur->bc_ops->recs_inorder(cur, &bs->lastrec, rec))
xchk_btree_set_corrupt(bs->sc, cur, 0);
- bs->firstrec = false;
memcpy(&bs->lastrec, rec, cur->bc_ops->rec_len);
if (cur->bc_nlevels == 1)
@@ -188,10 +188,9 @@ xchk_btree_key(
trace_xchk_btree_key(bs->sc, cur, level);
/* If this isn't the first key, are they in order? */
- if (!bs->firstkey[level] &&
+ if (cur->bc_ptrs[level] > 1 &&
!cur->bc_ops->keys_inorder(cur, &bs->lastkey[level], key))
xchk_btree_set_corrupt(bs->sc, cur, level);
- bs->firstkey[level] = false;
memcpy(&bs->lastkey[level], key, cur->bc_ops->key_len);
if (level + 1 >= cur->bc_nlevels)
@@ -636,7 +635,6 @@ xchk_btree(
struct xfs_buf *bp;
struct check_owner *co;
struct check_owner *n;
- int i;
int error = 0;
/*
@@ -649,13 +647,10 @@ xchk_btree(
bs->cur = cur;
bs->scrub_rec = scrub_fn;
bs->oinfo = oinfo;
- bs->firstrec = true;
bs->private = private;
bs->sc = sc;
/* Initialize scrub state */
- for (i = 0; i < XFS_BTREE_MAXLEVELS; i++)
- bs->firstkey[i] = true;
INIT_LIST_HEAD(&bs->to_check);
/* Don't try to check a tree with a height we can't handle. */
diff --git a/fs/xfs/scrub/btree.h b/fs/xfs/scrub/btree.h
index b7d2fc01fbf9..7671108f9f85 100644
--- a/fs/xfs/scrub/btree.h
+++ b/fs/xfs/scrub/btree.h
@@ -39,9 +39,7 @@ struct xchk_btree {
/* internal scrub state */
union xfs_btree_rec lastrec;
- bool firstrec;
union xfs_btree_key lastkey[XFS_BTREE_MAXLEVELS];
- bool firstkey[XFS_BTREE_MAXLEVELS];
struct list_head to_check;
};
int xchk_btree(struct xfs_scrub *sc, struct xfs_btree_cur *cur,
next prev parent reply other threads:[~2021-10-12 23:32 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-12 23:32 [PATCHSET v3 00/15] xfs: support dynamic btree cursor height Darrick J. Wong
2021-10-12 23:32 ` [PATCH 01/15] xfs: remove xfs_btree_cur.bc_blocklog Darrick J. Wong
2021-10-13 0:56 ` Dave Chinner
2021-10-12 23:32 ` [PATCH 02/15] xfs: reduce the size of nr_ops for refcount btree cursors Darrick J. Wong
2021-10-13 0:57 ` Dave Chinner
2021-10-12 23:32 ` Darrick J. Wong [this message]
2021-10-13 1:02 ` [PATCH 03/15] xfs: don't track firstrec/firstkey separately in xchk_btree Dave Chinner
2021-10-12 23:32 ` [PATCH 04/15] xfs: dynamically allocate btree scrub context structure Darrick J. Wong
2021-10-13 4:57 ` Dave Chinner
2021-10-13 16:29 ` Darrick J. Wong
2021-10-12 23:33 ` [PATCH 05/15] xfs: support dynamic btree cursor heights Darrick J. Wong
2021-10-13 5:31 ` Dave Chinner
2021-10-13 16:52 ` Darrick J. Wong
2021-10-13 21:14 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 06/15] xfs: rearrange xfs_btree_cur fields for better packing Darrick J. Wong
2021-10-13 5:34 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 07/15] xfs: refactor btree cursor allocation function Darrick J. Wong
2021-10-13 5:34 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 08/15] xfs: encode the max btree height in the cursor Darrick J. Wong
2021-10-13 5:38 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 09/15] xfs: dynamically allocate cursors based on maxlevels Darrick J. Wong
2021-10-13 5:40 ` Dave Chinner
2021-10-13 16:55 ` Darrick J. Wong
2021-10-12 23:33 ` [PATCH 10/15] xfs: compute actual maximum btree height for critical reservation calculation Darrick J. Wong
2021-10-13 5:49 ` Dave Chinner
2021-10-13 17:07 ` Darrick J. Wong
2021-10-13 20:18 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 11/15] xfs: compute the maximum height of the rmap btree when reflink enabled Darrick J. Wong
2021-10-13 7:25 ` Dave Chinner
2021-10-13 17:47 ` Darrick J. Wong
2021-10-12 23:33 ` [PATCH 12/15] xfs: kill XFS_BTREE_MAXLEVELS Darrick J. Wong
2021-10-13 7:25 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 13/15] xfs: widen btree maxlevels computation to handle 64-bit record counts Darrick J. Wong
2021-10-13 7:28 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 14/15] xfs: compute absolute maximum nlevels for each btree type Darrick J. Wong
2021-10-13 7:57 ` Dave Chinner
2021-10-13 21:36 ` Darrick J. Wong
2021-10-13 23:48 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 15/15] xfs: use separate btree cursor cache " Darrick J. Wong
2021-10-13 8:01 ` Dave Chinner
2021-10-13 21:42 ` Darrick J. Wong
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