v1->v2:
Add more specific description.
To get delayed-extent information, ext4_ext_fiemap_cb() lookups pagecache,
it thus collects information starting from a page's head block.
If blockszie < pagesize, the beginning blocks of a page may lie before the
range. ext4_ext_fiemap_cb() should proceed ignoring them, because they
has been handled before.
Reported-by: Amir Goldstein <amir73il@xxxxxxxxxxxx>
Signed-off-by: Yongqiang Yang <xiaoqiangnk@xxxxxxxxx>
---
fs/ext4/extents.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index e363f21..ec37109 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3718,9 +3718,14 @@ out:
bh = head;
do {
+ if (end < newex->ec_block)
+ /* The buffer is not in
+ * the request range.
+ */
+ continue;
if (buffer_mapped(bh)) {
/* get the 1st mapped buffer. */
- if (end > newex->ec_block +
+ if (end >= newex->ec_block +
newex->ec_len)
/* The buffer is out of
* the request range.
--
1.7.5.1
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