130 	io_channel undo_file;
139 	io_channel real;
192 	io_channel channel;  in write_undo_indexes()
320 static errcode_t undo_write_tdb(io_channel channel,  in undo_write_tdb()
480 static errcode_t undo_io_read_error(io_channel channel ATTR((unused)),  in undo_io_read_error()
492 static void undo_err_handler_init(io_channel channel)  in undo_err_handler_init()
497 static int check_filesystem(struct undo_header *hdr, io_channel undo_file,  in check_filesystem()
499 			    io_channel channel)  in check_filesystem()
694 static errcode_t undo_open(const char *name, int flags, io_channel *channel)  in undo_open()
696 	io_channel	io = NULL;  in undo_open()
796 static errcode_t undo_close(io_channel channel)  in undo_close()
831 static errcode_t undo_set_blksize(io_channel channel, int blksize)  in undo_set_blksize()
854 static errcode_t undo_read_blk64(io_channel channel, unsigned long long block,  in undo_read_blk64()
870 static errcode_t undo_read_blk(io_channel channel, unsigned long block,  in undo_read_blk()
876 static errcode_t undo_write_blk64(io_channel channel, unsigned long long block,  in undo_write_blk64()
897 static errcode_t undo_write_blk(io_channel channel, unsigned long block,  in undo_write_blk()
903 static errcode_t undo_write_byte(io_channel channel, unsigned long offset,  in undo_write_byte()
934 static errcode_t undo_discard(io_channel channel, unsigned long long block,  in undo_discard()
961 static errcode_t undo_zeroout(io_channel channel, unsigned long long block,  in undo_zeroout()
988 static errcode_t undo_cache_readahead(io_channel channel,  in undo_cache_readahead()
1008 static errcode_t undo_flush(io_channel channel)  in undo_flush()
1023 static errcode_t undo_set_option(io_channel channel, const char *option,  in undo_set_option()
1070 static errcode_t undo_get_stats(io_channel channel, io_stats *stats)  in undo_get_stats()