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nexedi
linux
Commits
a9bbe1cf
Commit
a9bbe1cf
authored
Apr 22, 2004
by
Russell Cattelan
Committed by
Christoph Hellwig
Apr 22, 2004
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[XFS] Fix for the xfs dir2 rebalance bug.
SGI Modid: xfs-linux:xfs-kern:170221a
parent
829eb1cc
Changes
1
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23 additions
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2 deletions
+23
-2
fs/xfs/xfs_dir2_node.c
fs/xfs/xfs_dir2_node.c
+23
-2
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fs/xfs/xfs_dir2_node.c
View file @
a9bbe1cf
/*
* Copyright (c) 2000-200
2
Silicon Graphics, Inc. All Rights Reserved.
* Copyright (c) 2000-200
4
Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
...
...
@@ -224,12 +224,21 @@ xfs_dir2_leafn_add(
mp
=
dp
->
i_mount
;
tp
=
args
->
trans
;
leaf
=
bp
->
data
;
/*
* Quick check just to make sure we are not going to index
* into other peoples memory
*/
if
(
index
<
0
)
return
XFS_ERROR
(
EFSCORRUPTED
);
/*
* If there are already the maximum number of leaf entries in
* the block, if there are no stale entries it won't fit.
* Caller will do a split. If there are stale entries we'll do
* a compact.
*/
if
(
INT_GET
(
leaf
->
hdr
.
count
,
ARCH_CONVERT
)
==
XFS_DIR2_MAX_LEAF_ENTS
(
mp
))
{
if
(
INT_ISZERO
(
leaf
->
hdr
.
stale
,
ARCH_CONVERT
))
return
XFS_ERROR
(
ENOSPC
);
...
...
@@ -828,12 +837,24 @@ xfs_dir2_leafn_rebalance(
state
->
inleaf
=
!
swap
;
else
state
->
inleaf
=
swap
^
(
args
->
hashval
<
INT_GET
(
leaf2
->
ents
[
0
].
hashval
,
ARCH_CONVERT
));
swap
^
(
blk1
->
index
<=
INT_GET
(
leaf1
->
hdr
.
count
,
ARCH_CONVERT
));
/*
* Adjust the expected index for insertion.
*/
if
(
!
state
->
inleaf
)
blk2
->
index
=
blk1
->
index
-
INT_GET
(
leaf1
->
hdr
.
count
,
ARCH_CONVERT
);
/*
* Finally sanity check just to make sure we are not returning a negative index
*/
if
(
blk2
->
index
<
0
)
{
state
->
inleaf
=
1
;
blk2
->
index
=
0
;
cmn_err
(
CE_ALERT
,
"xfs_dir2_leafn_rebalance: picked the wrong leaf? reverting orignal leaf: "
"blk1->index %d
\n
"
,
blk1
->
index
);
}
}
/*
...
...
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