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Subject[PATCH] ext4: Convert ext4_extent_idx.ei_leaf to ext4_extent_idx.ei_leaf_lo
Date
From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

Convert ext4_extent_idx.ei_leaf ext4_extent_idx.ei_leaf_lo
This helps in finding BUGs due to direct partial access of
these split 48 bit values.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
fs/ext4/extents.c | 4 ++--
include/linux/ext4_fs_extents.h | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index c03056a..8528774 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -65,7 +65,7 @@ static ext4_fsblk_t idx_pblock(struct ext4_extent_idx *ix)
{
ext4_fsblk_t block;

- block = le32_to_cpu(ix->ei_leaf);
+ block = le32_to_cpu(ix->ei_leaf_lo);
block |= ((ext4_fsblk_t) le16_to_cpu(ix->ei_leaf_hi) << 31) << 1;
return block;
}
@@ -88,7 +88,7 @@ static void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb)
*/
static void ext4_idx_store_pblock(struct ext4_extent_idx *ix, ext4_fsblk_t pb)
{
- ix->ei_leaf = cpu_to_le32((unsigned long) (pb & 0xffffffff));
+ ix->ei_leaf_lo = cpu_to_le32((unsigned long) (pb & 0xffffffff));
ix->ei_leaf_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
}

diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h
index cb2dfbb..d2045a2 100644
--- a/include/linux/ext4_fs_extents.h
+++ b/include/linux/ext4_fs_extents.h
@@ -83,7 +83,7 @@ struct ext4_extent {
*/
struct ext4_extent_idx {
__le32 ei_block; /* index covers logical blocks from 'block' */
- __le32 ei_leaf; /* pointer to the physical block of the next *
+ __le32 ei_leaf_lo; /* pointer to the physical block of the next *
* level. leaf or next index could be there */
__le16 ei_leaf_hi; /* high 16 bits of physical block */
__u16 ei_unused;
--
1.5.3.2.81.g17ed
-
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