From: Zheng Liu <wenqing.lz@xxxxxxxxxx>
This commit tries to fix some byte order issues that is found by sparse
check.
$ make M=fs/ext4 C=2 CF=-D__CHECK_ENDIAN__
...
CHECK fs/ext4/extents.c
fs/ext4/extents.c:5232:41: warning: restricted __le32 degrades to integer
fs/ext4/extents.c:5236:52: warning: bad assignment (-=) to restricted __le32
fs/ext4/extents.c:5258:45: warning: bad assignment (-=) to restricted __le32
fs/ext4/extents.c:5303:28: warning: restricted __le32 degrades to integer
fs/ext4/extents.c:5318:18: warning: incorrect type in assignment (different base types)
fs/ext4/extents.c:5318:18: expected unsigned int [unsigned] [usertype] ex_start
fs/ext4/extents.c:5318:18: got restricted __le32 [usertype] ee_block
fs/ext4/extents.c:5319:24: warning: restricted __le32 degrades to integer
fs/ext4/extents.c:5334:31: warning: incorrect type in assignment (different base types)
...
Cc: "Theodore Ts'o" <tytso@xxxxxxx>
Cc: Andreas Dilger <adilger.kernel@xxxxxxxxx>
Cc: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Signed-off-by: Zheng Liu <wenqing.lz@xxxxxxxxxx>
---
fs/ext4/extents.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 82df3ce..1867af6 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -5229,11 +5229,11 @@ ext4_ext_shift_path_extents(struct ext4_ext_path *path, ext4_lblk_t shift,
if (ex_start == EXT_FIRST_EXTENT(path[depth].p_hdr))
update = 1;
- *start = ex_last->ee_block +
+ *start = le32_to_cpu(ex_last->ee_block) +
ext4_ext_get_actual_len(ex_last);
while (ex_start <= ex_last) {
- ex_start->ee_block -= shift;
+ le32_add_cpu(&ex_start->ee_block, -shift);
if (ex_start >
EXT_FIRST_EXTENT(path[depth].p_hdr)) {
if (ext4_ext_try_to_merge_right(inode,
@@ -5255,7 +5255,7 @@ ext4_ext_shift_path_extents(struct ext4_ext_path *path, ext4_lblk_t shift,
if (err)
goto out;
- path[depth].p_idx->ei_block -= shift;
+ le32_add_cpu(&path[depth].p_idx->ei_block, -shift);
err = ext4_ext_dirty(handle, inode, path + depth);
if (err)
goto out;
@@ -5300,7 +5300,8 @@ ext4_ext_shift_extents(struct inode *inode, handle_t *handle,
return ret;
}
- stop_block = extent->ee_block + ext4_ext_get_actual_len(extent);
+ stop_block = le32_to_cpu(extent->ee_block) +
+ ext4_ext_get_actual_len(extent);
ext4_ext_drop_refs(path);
kfree(path);
@@ -5315,8 +5316,9 @@ ext4_ext_shift_extents(struct inode *inode, handle_t *handle,
path = ext4_ext_find_extent(inode, start - 1, NULL, 0);
depth = path->p_depth;
extent = path[depth].p_ext;
- ex_start = extent->ee_block;
- ex_end = extent->ee_block + ext4_ext_get_actual_len(extent);
+ ex_start = le32_to_cpu(extent->ee_block);
+ ex_end = le32_to_cpu(extent->ee_block) +
+ ext4_ext_get_actual_len(extent);
ext4_ext_drop_refs(path);
kfree(path);
@@ -5331,7 +5333,7 @@ ext4_ext_shift_extents(struct inode *inode, handle_t *handle,
return PTR_ERR(path);
depth = path->p_depth;
extent = path[depth].p_ext;
- current_block = extent->ee_block;
+ current_block = le32_to_cpu(extent->ee_block);
if (start > current_block) {
/* Hole, move to the next extent */
ret = mext_next_extent(inode, path, &extent);
--
1.7.9.7
--
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