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authorDave Chinner <david@fromorbit.com>2009-01-21 15:22:17 +1100
committerFelix Blyakher <felixb@sgi.com>2009-01-22 01:23:11 -0600
commit74e2d06521913443c7e2697037909f5efc200ec5 (patch)
tree4593c7ac6aba011389161642a61a1266377ed8b5
parentb6e3222732a3551e786aa47b90a8eab2a517711c (diff)
Long btree pointers are still 64 bit on disk
[XFS] Long btree pointers are still 64 bit on disk On 32 bit machines with CONFIG_LBD=n, XFS reduces the in memory size of xfs_fsblock_t to 32 bits so that it will fit within 32 bit addressing. However, the disk format for long btree pointers are still 64 bits in size. The recent btree rewrite failed to take this into account when initialising new btree blocks, setting sibling pointers to NULL and checking if they are NULL. Hence checking whether a 64 bit NULL was the same as a 32 bit NULL was failingi resulting in NULL sibling pointers failing to be detected correctly. This showed up as WANT_CORRUPTED_GOTO shutdowns in xfs_btree_delrec. Fix this by making all the comparisons and setting of long pointer btree NULL blocks to the disk format, not the in memory format. i.e. use NULLDFSBNO. Reported-by: Alexander Beregalov <a.beregalov@gmail.com> Reported-by: Jacek Luczak <difrost.kernel@gmail.com> Reported-by: Danny ter Haar <dth@dth.net> Tested-by: Jacek Luczak <difrost.kernel@gmail.com> Reviewed-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Felix Blyakher <felixb@sgi.com>
-rw-r--r--fs/xfs/xfs_btree.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index 4681519ded9..e73c332eb23 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -843,7 +843,7 @@ xfs_btree_ptr_is_null(
union xfs_btree_ptr *ptr)
{
if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
- return be64_to_cpu(ptr->l) == NULLFSBLOCK;
+ return be64_to_cpu(ptr->l) == NULLDFSBNO;
else
return be32_to_cpu(ptr->s) == NULLAGBLOCK;
}
@@ -854,7 +854,7 @@ xfs_btree_set_ptr_null(
union xfs_btree_ptr *ptr)
{
if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
- ptr->l = cpu_to_be64(NULLFSBLOCK);
+ ptr->l = cpu_to_be64(NULLDFSBNO);
else
ptr->s = cpu_to_be32(NULLAGBLOCK);
}
@@ -918,8 +918,8 @@ xfs_btree_init_block(
new->bb_numrecs = cpu_to_be16(numrecs);
if (cur->bc_flags & XFS_BTREE_LONG_PTRS) {
- new->bb_u.l.bb_leftsib = cpu_to_be64(NULLFSBLOCK);
- new->bb_u.l.bb_rightsib = cpu_to_be64(NULLFSBLOCK);
+ new->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
+ new->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
} else {
new->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
new->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
@@ -971,7 +971,7 @@ xfs_btree_ptr_to_daddr(
union xfs_btree_ptr *ptr)
{
if (cur->bc_flags & XFS_BTREE_LONG_PTRS) {
- ASSERT(be64_to_cpu(ptr->l) != NULLFSBLOCK);
+ ASSERT(be64_to_cpu(ptr->l) != NULLDFSBNO);
return XFS_FSB_TO_DADDR(cur->bc_mp, be64_to_cpu(ptr->l));
} else {