target: remove the task_lba field in struct se_task

Now that we don't split commands the lba field in the task is always
equivalent to the one in the CDB, even in cases where we have two tasks
due to a BIDI transfer.  Just refer the the lba in the command instead
of duplicating it in the task.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

4 files changed, 14 insertions, 12 deletions

diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index c3e899e..4343cfd 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -273,7 +273,7 @@ static int fd_do_readv(struct se_task *task)
 	struct scatterlist *sg = task->task_sg;
 	struct iovec *iov;
 	mm_segment_t old_fs;
-	loff_t pos = (task->task_lba *
+	loff_t pos = (task->task_se_cmd->t_task_lba *
 		      se_dev->se_sub_dev->se_dev_attrib.block_size);
 	int ret = 0, i;
 
@@ -326,7 +326,7 @@ static int fd_do_writev(struct se_task *task)
 	struct scatterlist *sg = task->task_sg;
 	struct iovec *iov;
 	mm_segment_t old_fs;
-	loff_t pos = (task->task_lba *
+	loff_t pos = (task->task_se_cmd->t_task_lba *
 		      se_dev->se_sub_dev->se_dev_attrib.block_size);
 	int ret, i = 0;
 
@@ -402,12 +402,13 @@ static void fd_emulate_write_fua(struct se_cmd *cmd, struct se_task *task)
 {
 	struct se_device *dev = cmd->se_dev;
 	struct fd_dev *fd_dev = dev->dev_ptr;
-	loff_t start = task->task_lba * dev->se_sub_dev->se_dev_attrib.block_size;
+	loff_t start = task->task_se_cmd->t_task_lba *
+		dev->se_sub_dev->se_dev_attrib.block_size;
 	loff_t end = start + task->task_size;
 	int ret;
 
 	pr_debug("FILEIO: FUA WRITE LBA: %llu, bytes: %u\n",
-			task->task_lba, task->task_size);
+			task->task_se_cmd->t_task_lba, task->task_size);
 
 	ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1);
 	if (ret != 0)
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 2ec299e..311f43b 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -536,13 +536,13 @@ static int iblock_do_task(struct se_task *task)
 	 * struct se_task SCSI blocksize into Linux/Block 512 units for BIO.
 	 */
 	if (dev->se_sub_dev->se_dev_attrib.block_size == 4096)
-		block_lba = (task->task_lba << 3);
+		block_lba = (cmd->t_task_lba << 3);
 	else if (dev->se_sub_dev->se_dev_attrib.block_size == 2048)
-		block_lba = (task->task_lba << 2);
+		block_lba = (cmd->t_task_lba << 2);
 	else if (dev->se_sub_dev->se_dev_attrib.block_size == 1024)
-		block_lba = (task->task_lba << 1);
+		block_lba = (cmd->t_task_lba << 1);
 	else if (dev->se_sub_dev->se_dev_attrib.block_size == 512)
-		block_lba = task->task_lba;
+		block_lba = cmd->t_task_lba;
 	else {
 		pr_err("Unsupported SCSI -> BLOCK LBA conversion:"
 				" %u\n", dev->se_sub_dev->se_dev_attrib.block_size);
@@ -646,7 +646,7 @@ static void iblock_bio_done(struct bio *bio, int err)
 		return;
 
 	pr_debug("done[%p] bio: %p task_lba: %llu bio_lba: %llu err=%d\n",
-		 task, bio, task->task_lba,
+		 task, bio, task->task_se_cmd->t_task_lba,
 		 (unsigned long long)bio->bi_sector, err);
 
 	transport_complete_task(task, !atomic_read(&ibr->ib_bio_err_cnt));
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index 35c64d1..0bec572 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -303,7 +303,8 @@ static int rd_do_task(struct se_task *task)
 	u32 src_len;
 	u64 tmp;
 
-	tmp = task->task_lba * se_dev->se_sub_dev->se_dev_attrib.block_size;
+	tmp = task->task_se_cmd->t_task_lba *
+		se_dev->se_sub_dev->se_dev_attrib.block_size;
 	rd_offset = do_div(tmp, PAGE_SIZE);
 	rd_page = tmp;
 	rd_size = task->task_size;
@@ -318,7 +319,8 @@ static int rd_do_task(struct se_task *task)
 			dev->rd_dev_id,
 			task->task_data_direction == DMA_FROM_DEVICE ?
 				"Read" : "Write",
-			task->task_lba, rd_size, rd_page, rd_offset);
+			task->task_se_cmd->t_task_lba,
+			rd_size, rd_page, rd_offset);
 
 	src_len = PAGE_SIZE - rd_offset;
 	sg_miter_start(&m, task->task_sg, task->task_sg_nents,
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 2b84521..0fb3521 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -3724,7 +3724,6 @@ transport_allocate_data_tasks(struct se_cmd *cmd,
 	task->task_sg_nents = sgl_nents;
 	task->task_size = cmd->data_length;
 
-	task->task_lba = cmd->t_task_lba;
 	task->task_sectors = sectors;
 
 	spin_lock_irqsave(&cmd->t_state_lock, flags);