static void check_tree(struct rb_root *root, const char *msg)
{
- struct rb_node *new_node, *node, *next;
+ struct rb_node *node;
struct bmap_rb_extent *ext, *old = NULL;
for (node = ext2fs_rb_first(root); node;
node = ext2fs_rb_next(node)) {
ext = node_to_extent(node);
- if (ext->count <= 0) {
- printf("Tree Error: count is crazy\n");
- printf("extent: %llu -> %llu (%u)\n", ext->start,
+ if (ext->count == 0) {
+ printf("Tree Error: count is zero\n");
+ printf("extent: %llu -> %llu (%llu)\n", ext->start,
ext->start + ext->count, ext->count);
goto err_out;
}
- if (ext->start < 0) {
- printf("Tree Error: start is crazy\n");
- printf("extent: %llu -> %llu (%u)\n", ext->start,
+ if (ext->start + ext->count < ext->start) {
+ printf("Tree Error: start or count is crazy\n");
+ printf("extent: %llu -> %llu (%llu)\n", ext->start,
ext->start + ext->count, ext->count);
goto err_out;
}
if (old) {
if (old->start > ext->start) {
printf("Tree Error: start is crazy\n");
- printf("extent: %llu -> %llu (%u)\n",
+ printf("extent: %llu -> %llu (%llu)\n",
old->start, old->start + old->count,
old->count);
- printf("extent next: %llu -> %llu (%u)\n",
+ printf("extent next: %llu -> %llu (%llu)\n",
ext->start, ext->start + ext->count,
ext->count);
goto err_out;
}
if ((old->start + old->count) >= ext->start) {
printf("Tree Error: extent is crazy\n");
- printf("extent: %llu -> %llu (%u)\n",
+ printf("extent: %llu -> %llu (%llu)\n",
old->start, old->start + old->count,
old->count);
- printf("extent next: %llu -> %llu (%u)\n",
+ printf("extent next: %llu -> %llu (%llu)\n",
ext->start, ext->start + ext->count,
ext->count);
goto err_out;
check_tree(&bp->root, __func__);
}
+static errcode_t rb_find_first_zero(ext2fs_generic_bitmap bitmap,
+ __u64 start, __u64 end, __u64 *out)
+{
+ struct rb_node *parent = NULL, **n;
+ struct ext2fs_rb_private *bp;
+ struct bmap_rb_extent *ext;
+
+ bp = (struct ext2fs_rb_private *) bitmap->private;
+ n = &bp->root.rb_node;
+ start -= bitmap->start;
+ end -= bitmap->start;
+
+ if (start > end)
+ return EINVAL;
+
+ if (EXT2FS_RB_EMPTY_ROOT(&bp->root))
+ return ENOENT;
+
+ while (*n) {
+ parent = *n;
+ ext = node_to_extent(parent);
+ if (start < ext->start) {
+ n = &(*n)->rb_left;
+ } else if (start >= (ext->start + ext->count)) {
+ n = &(*n)->rb_right;
+ } else if (ext->start + ext->count <= end) {
+ *out = ext->start + ext->count + bitmap->start;
+ return 0;
+ } else
+ return ENOENT;
+ }
+
+ *out = start + bitmap->start;
+ return 0;
+}
+
+static errcode_t rb_find_first_set(ext2fs_generic_bitmap bitmap,
+ __u64 start, __u64 end, __u64 *out)
+{
+ struct rb_node *parent = NULL, **n;
+ struct rb_node *node;
+ struct ext2fs_rb_private *bp;
+ struct bmap_rb_extent *ext;
+
+ bp = (struct ext2fs_rb_private *) bitmap->private;
+ n = &bp->root.rb_node;
+ start -= bitmap->start;
+ end -= bitmap->start;
+
+ if (start > end)
+ return EINVAL;
+
+ if (EXT2FS_RB_EMPTY_ROOT(&bp->root))
+ return ENOENT;
+
+ while (*n) {
+ parent = *n;
+ ext = node_to_extent(parent);
+ if (start < ext->start) {
+ n = &(*n)->rb_left;
+ } else if (start >= (ext->start + ext->count)) {
+ n = &(*n)->rb_right;
+ } else {
+ /* The start bit is set */
+ *out = start + bitmap->start;
+ return 0;
+ }
+ }
+
+ node = parent;
+ ext = node_to_extent(node);
+ if (ext->start < start) {
+ node = ext2fs_rb_next(node);
+ if (node == NULL)
+ return ENOENT;
+ ext = node_to_extent(node);
+ }
+ if (ext->start <= end) {
+ *out = ext->start + bitmap->start;
+ return 0;
+ }
+ return ENOENT;
+}
+
#ifdef BMAP_STATS
static void rb_print_stats(ext2fs_generic_bitmap bitmap)
{
.get_bmap_range = rb_get_bmap_range,
.clear_bmap = rb_clear_bmap,
.print_stats = rb_print_stats,
+ .find_first_zero = rb_find_first_zero,
+ .find_first_set = rb_find_first_set,
};