e2fsprogs: Add discard function into struct_io_manager

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

diff --git a/lib/ext2fs/io_manager.c b/lib/ext2fs/io_manager.c
index 6d0e234..80f9dfc 100644 (file)
--- a/lib/ext2fs/io_manager.c
+++ b/lib/ext2fs/io_manager.c
@@ -99,3 +99,14 @@ errcode_t io_channel_write_blk64(io_channel channel, unsigned long long block,
        return (channel->manager->write_blk)(channel, (unsigned long) block,
                                             count, data);
 }
+
+errcode_t io_channel_discard(io_channel channel, unsigned long long block,
+                            unsigned long long count)
+{
+       EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
+
+       if (channel->manager->discard)
+               return (channel->manager->discard)(channel, block, count);
+
+       return EXT2_ET_UNIMPLEMENTED;
+}