btrfs-progs: Document logic of btrfs_read_dev_super

[platform/upstream/btrfs-progs.git] / cmds-check.c

diff --git a/cmds-check.c b/cmds-check.c
index ce8fd6e..5fc0ea9 100644 (file)
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -1635,8 +1635,9 @@ static int process_dir_item(struct extent_buffer *eb,
                                          namebuf, len, filetype,
                                          key->type, error);
                } else {
-                       fprintf(stderr, "invalid location in dir item %u\n",
-                               location.type);
+                       fprintf(stderr,
+                               "unknown location type %d in DIR_ITEM[%llu %llu]\n",
+                               location.type, key->objectid, key->offset);
                        add_inode_backref(inode_cache, BTRFS_MULTIPLE_OBJECTIDS,
                                          key->objectid, key->offset, namebuf,
                                          len, filetype, key->type, error);
@@ -8365,7 +8366,13 @@ static int process_extent_item(struct btrfs_root *root,
        if (item_size < sizeof(*ei)) {
 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
                struct btrfs_extent_item_v0 *ei0;
-               BUG_ON(item_size != sizeof(*ei0));
+               if (item_size != sizeof(*ei0)) {
+                       error(
+       "invalid extent item format: ITEM[%llu %u %llu] leaf: %llu slot: %d",
+                               key.objectid, key.type, key.offset,
+                               btrfs_header_bytenr(eb), slot);
+                       BUG();
+               }
                ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
                refs = btrfs_extent_refs_v0(eb, ei0);
 #else