md/dm-vdo/packer.c

36  * vdo_get_compressed_block_fragment() - Get a reference to a compressed fragment from a compressed
39  * @compressed_block [in] The compressed block that was read from disk.
40  * @fragment_offset [out] The offset of the fragment within a compressed block.
43  * Return: If a valid compressed fragment is found, VDO_SUCCESS; otherwise, VDO_INVALID_FRAGMENT if
251  * release_compressed_write_waiter() - Update a data_vio for which a successful compressed write
255  * @allocation: The allocation to which the compressed block was written.
271  * finish_compressed_write() - Finish a compressed block write.
272  * @completion: The compressed write completion.
306 			       "Completing compressed write vio for physical block %llu with error",  in handle_compressed_write_error()
359  * initialize_compressed_block() - Initialize a compressed block.
360  * @block: The compressed block to initialize.
363  * This method initializes the compressed block in the compressed write agent. Because the
364  * compressor already put the agent's compressed fragment at the start of the compressed block's
381  * pack_fragment() - Pack a data_vio's fragment into the compressed block in which it is already
385  * @offset: The offset into the compressed block at which to pack the fragment.
386  * @compressed_block: The compressed block which will be written out when batch is fully packed.
407  * compressed_write_end_io() - The bio_end_io for a compressed block write.
408  * @bio: The bio for the compressed write.
448 	 * If the batch contains only a single vio, then we save nothing by saving the compressed  in write_bin()
476 	 * Once the compressed write is submitted, the fragments are no longer in the packer, so  in write_bin()
519  * select_bin() - Select the bin that should be used to pack the compressed data in a data_vio with
529 	 * compressed data in the data_vio.  in select_bin()
541 	 * the fullest bin, since that "wastes" the least amount of free space in the compressed  in select_bin()
542 	 * block. But if the space currently used in the fullest bin is smaller than the compressed  in select_bin()
559  * vdo_attempt_packing() - Attempt to rewrite the data in this data_vio as part of a compressed
597 	 * allowed to be compressed (if it has already been canceled, we'll fall out here). Once  in vdo_attempt_packing()
646  * All bins with at least two compressed data blocks will be written out, and any solitary pending