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authorChristoph Hellwig <hch@lst.de>2015-06-19 15:10:58 +0200
committerNicholas Bellinger <nab@linux-iscsi.org>2015-06-23 00:43:42 -0700
commit7a971b1b3055f0e76ff09b8fd0dd809ea3b48279 (patch)
treec712c1dabef5628269b28038b2e757e820884de4
parente2e21bd8f979a24462070cc89fae11e819cae90a (diff)
downloadop-kernel-dev-7a971b1b3055f0e76ff09b8fd0dd809ea3b48279.zip
op-kernel-dev-7a971b1b3055f0e76ff09b8fd0dd809ea3b48279.tar.gz
target: replace se_cmd->execute_rw with a protocol_data field
Instead of leaking this SBC read/write implementation detail just add an opaqueue protocol specific pointer to struct se_cmd that we can assign the sbc_ops vector to. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
-rw-r--r--drivers/target/target_core_sbc.c20
-rw-r--r--include/target/target_core_base.h3
2 files changed, 8 insertions, 15 deletions
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 31b2ae3..287843e 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -381,7 +381,9 @@ out:
static sense_reason_t
sbc_execute_rw(struct se_cmd *cmd)
{
- return cmd->execute_rw(cmd, cmd->t_data_sg, cmd->t_data_nents,
+ struct sbc_ops *ops = cmd->protocol_data;
+
+ return ops->execute_rw(cmd, cmd->t_data_sg, cmd->t_data_nents,
cmd->data_direction);
}
@@ -560,6 +562,7 @@ out:
static sense_reason_t
sbc_compare_and_write(struct se_cmd *cmd)
{
+ struct sbc_ops *ops = cmd->protocol_data;
struct se_device *dev = cmd->se_dev;
sense_reason_t ret;
int rc;
@@ -579,7 +582,7 @@ sbc_compare_and_write(struct se_cmd *cmd)
*/
cmd->data_length = cmd->t_task_nolb * dev->dev_attrib.block_size;
- ret = cmd->execute_rw(cmd, cmd->t_bidi_data_sg, cmd->t_bidi_data_nents,
+ ret = ops->execute_rw(cmd, cmd->t_bidi_data_sg, cmd->t_bidi_data_nents,
DMA_FROM_DEVICE);
if (ret) {
cmd->transport_complete_callback = NULL;
@@ -766,12 +769,13 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
u32 sectors = 0;
sense_reason_t ret;
+ cmd->protocol_data = ops;
+
switch (cdb[0]) {
case READ_6:
sectors = transport_get_sectors_6(cdb);
cmd->t_task_lba = transport_lba_21(cdb);
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- cmd->execute_rw = ops->execute_rw;
cmd->execute_cmd = sbc_execute_rw;
break;
case READ_10:
@@ -786,7 +790,6 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
return ret;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- cmd->execute_rw = ops->execute_rw;
cmd->execute_cmd = sbc_execute_rw;
break;
case READ_12:
@@ -801,7 +804,6 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
return ret;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- cmd->execute_rw = ops->execute_rw;
cmd->execute_cmd = sbc_execute_rw;
break;
case READ_16:
@@ -816,14 +818,12 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
return ret;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- cmd->execute_rw = ops->execute_rw;
cmd->execute_cmd = sbc_execute_rw;
break;
case WRITE_6:
sectors = transport_get_sectors_6(cdb);
cmd->t_task_lba = transport_lba_21(cdb);
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- cmd->execute_rw = ops->execute_rw;
cmd->execute_cmd = sbc_execute_rw;
break;
case WRITE_10:
@@ -839,7 +839,6 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
return ret;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- cmd->execute_rw = ops->execute_rw;
cmd->execute_cmd = sbc_execute_rw;
break;
case WRITE_12:
@@ -854,7 +853,6 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
return ret;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- cmd->execute_rw = ops->execute_rw;
cmd->execute_cmd = sbc_execute_rw;
break;
case WRITE_16:
@@ -869,7 +867,6 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
return ret;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- cmd->execute_rw = ops->execute_rw;
cmd->execute_cmd = sbc_execute_rw;
break;
case XDWRITEREAD_10:
@@ -887,7 +884,6 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
/*
* Setup BIDI XOR callback to be run after I/O completion.
*/
- cmd->execute_rw = ops->execute_rw;
cmd->execute_cmd = sbc_execute_rw;
cmd->transport_complete_callback = &xdreadwrite_callback;
break;
@@ -911,7 +907,6 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
* Setup BIDI XOR callback to be run during after I/O
* completion.
*/
- cmd->execute_rw = ops->execute_rw;
cmd->execute_cmd = sbc_execute_rw;
cmd->transport_complete_callback = &xdreadwrite_callback;
break;
@@ -955,7 +950,6 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
cmd->t_task_lba = get_unaligned_be64(&cdb[2]);
cmd->t_task_nolb = sectors;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB | SCF_COMPARE_AND_WRITE;
- cmd->execute_rw = ops->execute_rw;
cmd->execute_cmd = sbc_compare_and_write;
cmd->transport_complete_callback = compare_and_write_callback;
break;
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 8a4f861..2738184 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -490,9 +490,8 @@ struct se_cmd {
struct kref cmd_kref;
const struct target_core_fabric_ops *se_tfo;
sense_reason_t (*execute_cmd)(struct se_cmd *);
- sense_reason_t (*execute_rw)(struct se_cmd *, struct scatterlist *,
- u32, enum dma_data_direction);
sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
+ void *protocol_data;
unsigned char *t_task_cdb;
unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
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