Btrfs: add extent buffer bitmap sanity tests
Sanity test the extent buffer bitmap operations (test, set, and clear)
against the equivalent standard kernel operations.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 324d382..a6eec2d0 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4730,24 +4730,14 @@
return new;
}
-struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
- u64 start)
+struct extent_buffer *__alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
+ u64 start, unsigned long len)
{
struct extent_buffer *eb;
- unsigned long len;
unsigned long num_pages;
unsigned long i;
- if (!fs_info) {
- /*
- * Called only from tests that don't always have a fs_info
- * available, but we know that nodesize is 4096
- */
- len = 4096;
- } else {
- len = fs_info->tree_root->nodesize;
- }
- num_pages = num_extent_pages(0, len);
+ num_pages = num_extent_pages(start, len);
eb = __alloc_extent_buffer(fs_info, start, len);
if (!eb)
@@ -4770,6 +4760,24 @@
return NULL;
}
+struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
+ u64 start)
+{
+ unsigned long len;
+
+ if (!fs_info) {
+ /*
+ * Called only from tests that don't always have a fs_info
+ * available, but we know that nodesize is 4096
+ */
+ len = 4096;
+ } else {
+ len = fs_info->tree_root->nodesize;
+ }
+
+ return __alloc_dummy_extent_buffer(fs_info, start, len);
+}
+
static void check_buffer_tree_ref(struct extent_buffer *eb)
{
int refs;