ext2fs: add readahead method to improve scanning

[tools/e2fsprogs.git] / lib / ext2fs / io_manager.c

diff --git a/lib/ext2fs/io_manager.c b/lib/ext2fs/io_manager.c
index 34e4859..dc5888d 100644 (file)
--- a/lib/ext2fs/io_manager.c
+++ b/lib/ext2fs/io_manager.c
@@ -128,3 +128,12 @@ errcode_t io_channel_alloc_buf(io_channel io, int count, void *ptr)
        else
                return ext2fs_get_mem(size, ptr);
 }
+
+errcode_t io_channel_cache_readahead(io_channel io, unsigned long long block,
+                                    unsigned long long count)
+{
+       if (!io->manager->cache_readahead)
+               return EXT2_ET_OP_NOT_SUPPORTED;
+
+       return io->manager->cache_readahead(io, block, count);
+}