Commit 02d26103 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

sd: implement REQ_OP_WRITE_ZEROES 



Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 885fa13f

drivers/scsi/sd.c

+26 −5
Original line number Diff line number Diff line
@@ -735,7 +735,7 @@ static int sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) 
	return scsi_init_io(cmd);

}



static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd)

static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, bool unmap)

{

	struct scsi_device *sdp = cmd->device;

	struct request *rq = cmd->request;
@@ -752,13 +752,14 @@ static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd) 


	cmd->cmd_len = 16;

	cmd->cmnd[0] = WRITE_SAME_16;

	if (unmap)

		cmd->cmnd[1] = 0x8; /* UNMAP */

	put_unaligned_be64(sector, &cmd->cmnd[2]);

	put_unaligned_be32(nr_sectors, &cmd->cmnd[10]);



	cmd->allowed = SD_MAX_RETRIES;

	cmd->transfersize = data_len;

	rq->timeout = SD_TIMEOUT;

	rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;

	scsi_req(rq)->resid_len = data_len;



	return scsi_init_io(cmd);
@@ -788,12 +789,27 @@ static int sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, bool unmap) 


	cmd->allowed = SD_MAX_RETRIES;

	cmd->transfersize = data_len;

	rq->timeout = SD_TIMEOUT;

	rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;

	scsi_req(rq)->resid_len = data_len;



	return scsi_init_io(cmd);

}



static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd)

{

	struct request *rq = cmd->request;

	struct scsi_device *sdp = cmd->device;

	struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);

	u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9);

	u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9);



	if (sdp->no_write_same)

		return BLKPREP_INVALID;

	if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff)

		return sd_setup_write_same16_cmnd(cmd, false);

	return sd_setup_write_same10_cmnd(cmd, false);

}



static void sd_config_write_same(struct scsi_disk *sdkp)

{

	struct request_queue *q = sdkp->disk->queue;
@@ -823,6 +839,8 @@ static void sd_config_write_same(struct scsi_disk *sdkp) 
out:

	blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks *

					 (logical_block_size >> 9));

	blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks *

					 (logical_block_size >> 9));

}



/**
@@ -1163,7 +1181,7 @@ static int sd_init_command(struct scsi_cmnd *cmd) 
		case SD_LBP_UNMAP:

			return sd_setup_unmap_cmnd(cmd);

		case SD_LBP_WS16:

			return sd_setup_write_same16_cmnd(cmd);

			return sd_setup_write_same16_cmnd(cmd, true);

		case SD_LBP_WS10:

			return sd_setup_write_same10_cmnd(cmd, true);

		case SD_LBP_ZERO:
@@ -1171,6 +1189,8 @@ static int sd_init_command(struct scsi_cmnd *cmd) 
		default:

			return BLKPREP_INVALID;

		}

	case REQ_OP_WRITE_ZEROES:

		return sd_setup_write_zeroes_cmnd(cmd);

	case REQ_OP_WRITE_SAME:

		return sd_setup_write_same_cmnd(cmd);

	case REQ_OP_FLUSH:
@@ -1810,6 +1830,7 @@ static int sd_done(struct scsi_cmnd *SCpnt) 


	switch (req_op(req)) {

	case REQ_OP_DISCARD:

	case REQ_OP_WRITE_ZEROES:

	case REQ_OP_WRITE_SAME:

	case REQ_OP_ZONE_RESET:

		if (!result) {

drivers/scsi/sd_zbc.c

+1 −0
Original line number Diff line number Diff line
@@ -329,6 +329,7 @@ void sd_zbc_complete(struct scsi_cmnd *cmd, 


	switch (req_op(rq)) {

	case REQ_OP_WRITE:

	case REQ_OP_WRITE_ZEROES:

	case REQ_OP_WRITE_SAME:

	case REQ_OP_ZONE_RESET: