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https://github.com/kdave/btrfs-progs
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In lowmem mode, we check fs roots and free space cache by iterating each root item and inode item, using btrfs_next_item() and a path pointing to the root tree. However in repair mode, check_fs_root() can modify the fs root, thus CoWs the tree root, and the old path in check_fs It could lead to strange behavior, e.g. after repairing a fs tree, the path can point to a fs tree. Since no ROOT_ITEM exists in fs tree, all remaining trees are skipped in repair mode. This bug exists from the early time of lowmem mode repair, and is only exposed by recent free space inode check code. (Fs tree inodes are passed to free space inode check, causing false alerts and repair failure). Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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| .. | ||
| main.c | ||
| mode-common.c | ||
| mode-common.h | ||
| mode-lowmem.c | ||
| mode-lowmem.h | ||
| mode-original.h | ||