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authorChristoph Hellwig <hch@infradead.org>2012-06-17 18:40:52 -0400
committerNicholas Bellinger <nab@linux-iscsi.org>2012-06-21 11:29:52 -0700
commitb02c2cf1a1975100963905b9d731656e9a05bd48 (patch)
treeac01bb63925e9988e3d2879927cd321f47161928
parentc9e649fdc1a0a55e72a649045c496bafd728e005 (diff)
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target: add struct spc_ops + initial ->execute_rw pointer usage
Remove the execute_cmd method in struct se_subsystem_api, and always use the one directly in struct se_cmd. To make life simpler for SBC virtual backends a struct spc_ops that is passed to sbc_parse_cmd is added. For now it only contains an execute_rw member, but more will follow with the subsequent commits. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
-rw-r--r--drivers/target/target_core_file.c18
-rw-r--r--drivers/target/target_core_iblock.c18
-rw-r--r--drivers/target/target_core_pscsi.c11
-rw-r--r--drivers/target/target_core_rd.c18
-rw-r--r--drivers/target/target_core_sbc.c12
-rw-r--r--drivers/target/target_core_transport.c6
-rw-r--r--include/target/target_core_backend.h8
7 files changed, 66 insertions, 25 deletions
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index e2df308..720ed59 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -375,9 +375,11 @@ static void fd_emulate_sync_cache(struct se_cmd *cmd)
}
}
-static int fd_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
- u32 sgl_nents, enum dma_data_direction data_direction)
+static int fd_execute_rw(struct se_cmd *cmd)
{
+ struct scatterlist *sgl = cmd->t_data_sg;
+ u32 sgl_nents = cmd->t_data_nents;
+ enum dma_data_direction data_direction = cmd->data_direction;
struct se_device *dev = cmd->se_dev;
int ret = 0;
@@ -550,6 +552,15 @@ static sector_t fd_get_blocks(struct se_device *dev)
return div_u64(dev_size, dev->se_sub_dev->se_dev_attrib.block_size);
}
+static struct spc_ops fd_spc_ops = {
+ .execute_rw = fd_execute_rw,
+};
+
+static int fd_parse_cdb(struct se_cmd *cmd)
+{
+ return sbc_parse_cdb(cmd, &fd_spc_ops);
+}
+
static struct se_subsystem_api fileio_template = {
.name = "fileio",
.owner = THIS_MODULE,
@@ -561,8 +572,7 @@ static struct se_subsystem_api fileio_template = {
.allocate_virtdevice = fd_allocate_virtdevice,
.create_virtdevice = fd_create_virtdevice,
.free_device = fd_free_device,
- .parse_cdb = sbc_parse_cdb,
- .execute_cmd = fd_execute_cmd,
+ .parse_cdb = fd_parse_cdb,
.do_sync_cache = fd_emulate_sync_cache,
.check_configfs_dev_params = fd_check_configfs_dev_params,
.set_configfs_dev_params = fd_set_configfs_dev_params,
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index c2d4ccb..eb94367 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -514,9 +514,11 @@ static void iblock_submit_bios(struct bio_list *list, int rw)
blk_finish_plug(&plug);
}
-static int iblock_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
- u32 sgl_nents, enum dma_data_direction data_direction)
+static int iblock_execute_rw(struct se_cmd *cmd)
{
+ struct scatterlist *sgl = cmd->t_data_sg;
+ u32 sgl_nents = cmd->t_data_nents;
+ enum dma_data_direction data_direction = cmd->data_direction;
struct se_device *dev = cmd->se_dev;
struct iblock_req *ibr;
struct bio *bio;
@@ -663,6 +665,15 @@ static void iblock_bio_done(struct bio *bio, int err)
iblock_complete_cmd(cmd);
}
+static struct spc_ops iblock_spc_ops = {
+ .execute_rw = iblock_execute_rw,
+};
+
+static int iblock_parse_cdb(struct se_cmd *cmd)
+{
+ return sbc_parse_cdb(cmd, &iblock_spc_ops);
+}
+
static struct se_subsystem_api iblock_template = {
.name = "iblock",
.owner = THIS_MODULE,
@@ -674,8 +685,7 @@ static struct se_subsystem_api iblock_template = {
.allocate_virtdevice = iblock_allocate_virtdevice,
.create_virtdevice = iblock_create_virtdevice,
.free_device = iblock_free_device,
- .parse_cdb = sbc_parse_cdb,
- .execute_cmd = iblock_execute_cmd,
+ .parse_cdb = iblock_parse_cdb,
.do_discard = iblock_do_discard,
.do_sync_cache = iblock_emulate_sync_cache,
.check_configfs_dev_params = iblock_check_configfs_dev_params,
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index cb4c6b1..6e32ff6 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -55,6 +55,7 @@
static struct se_subsystem_api pscsi_template;
+static int pscsi_execute_cmd(struct se_cmd *cmd);
static void pscsi_req_done(struct request *, int);
/* pscsi_attach_hba():
@@ -1081,17 +1082,20 @@ static int pscsi_parse_cdb(struct se_cmd *cmd)
case WRITE_16:
case WRITE_VERIFY:
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- break;
+ /* FALLTHROUGH*/
default:
+ cmd->execute_cmd = pscsi_execute_cmd;
break;
}
return 0;
}
-static int pscsi_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
- u32 sgl_nents, enum dma_data_direction data_direction)
+static int pscsi_execute_cmd(struct se_cmd *cmd)
{
+ struct scatterlist *sgl = cmd->t_data_sg;
+ u32 sgl_nents = cmd->t_data_nents;
+ enum dma_data_direction data_direction = cmd->data_direction;
struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr;
struct pscsi_plugin_task *pt;
struct request *req;
@@ -1259,7 +1263,6 @@ static struct se_subsystem_api pscsi_template = {
.free_device = pscsi_free_device,
.transport_complete = pscsi_transport_complete,
.parse_cdb = pscsi_parse_cdb,
- .execute_cmd = pscsi_execute_cmd,
.check_configfs_dev_params = pscsi_check_configfs_dev_params,
.set_configfs_dev_params = pscsi_set_configfs_dev_params,
.show_configfs_dev_params = pscsi_show_configfs_dev_params,
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index d7e8382..d00bbe3 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -284,9 +284,11 @@ static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
return NULL;
}
-static int rd_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
- u32 sgl_nents, enum dma_data_direction data_direction)
+static int rd_execute_rw(struct se_cmd *cmd)
{
+ struct scatterlist *sgl = cmd->t_data_sg;
+ u32 sgl_nents = cmd->t_data_nents;
+ enum dma_data_direction data_direction = cmd->data_direction;
struct se_device *se_dev = cmd->se_dev;
struct rd_dev *dev = se_dev->dev_ptr;
struct rd_dev_sg_table *table;
@@ -460,6 +462,15 @@ static sector_t rd_get_blocks(struct se_device *dev)
return blocks_long;
}
+static struct spc_ops rd_spc_ops = {
+ .execute_rw = rd_execute_rw,
+};
+
+static int rd_parse_cdb(struct se_cmd *cmd)
+{
+ return sbc_parse_cdb(cmd, &rd_spc_ops);
+}
+
static struct se_subsystem_api rd_mcp_template = {
.name = "rd_mcp",
.transport_type = TRANSPORT_PLUGIN_VHBA_VDEV,
@@ -468,8 +479,7 @@ static struct se_subsystem_api rd_mcp_template = {
.allocate_virtdevice = rd_allocate_virtdevice,
.create_virtdevice = rd_create_virtdevice,
.free_device = rd_free_device,
- .parse_cdb = sbc_parse_cdb,
- .execute_cmd = rd_execute_cmd,
+ .parse_cdb = rd_parse_cdb,
.check_configfs_dev_params = rd_check_configfs_dev_params,
.set_configfs_dev_params = rd_set_configfs_dev_params,
.show_configfs_dev_params = rd_show_configfs_dev_params,
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 870c98f..d5326f3 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -395,7 +395,7 @@ out:
kfree(buf);
}
-int sbc_parse_cdb(struct se_cmd *cmd)
+int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops)
{
struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
struct se_device *dev = cmd->se_dev;
@@ -409,26 +409,31 @@ int sbc_parse_cdb(struct se_cmd *cmd)
sectors = transport_get_sectors_6(cdb);
cmd->t_task_lba = transport_lba_21(cdb);
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
+ cmd->execute_cmd = ops->execute_rw;
break;
case READ_10:
sectors = transport_get_sectors_10(cdb);
cmd->t_task_lba = transport_lba_32(cdb);
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
+ cmd->execute_cmd = ops->execute_rw;
break;
case READ_12:
sectors = transport_get_sectors_12(cdb);
cmd->t_task_lba = transport_lba_32(cdb);
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
+ cmd->execute_cmd = ops->execute_rw;
break;
case READ_16:
sectors = transport_get_sectors_16(cdb);
cmd->t_task_lba = transport_lba_64(cdb);
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
+ cmd->execute_cmd = ops->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_cmd = ops->execute_rw;
break;
case WRITE_10:
case WRITE_VERIFY:
@@ -437,6 +442,7 @@ int sbc_parse_cdb(struct se_cmd *cmd)
if (cdb[1] & 0x8)
cmd->se_cmd_flags |= SCF_FUA;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
+ cmd->execute_cmd = ops->execute_rw;
break;
case WRITE_12:
sectors = transport_get_sectors_12(cdb);
@@ -444,6 +450,7 @@ int sbc_parse_cdb(struct se_cmd *cmd)
if (cdb[1] & 0x8)
cmd->se_cmd_flags |= SCF_FUA;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
+ cmd->execute_cmd = ops->execute_rw;
break;
case WRITE_16:
sectors = transport_get_sectors_16(cdb);
@@ -451,6 +458,7 @@ int sbc_parse_cdb(struct se_cmd *cmd)
if (cdb[1] & 0x8)
cmd->se_cmd_flags |= SCF_FUA;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
+ cmd->execute_cmd = ops->execute_rw;
break;
case XDWRITEREAD_10:
if ((cmd->data_direction != DMA_TO_DEVICE) ||
@@ -464,6 +472,7 @@ int sbc_parse_cdb(struct se_cmd *cmd)
/*
* Setup BIDI XOR callback to be run after I/O completion.
*/
+ cmd->execute_cmd = ops->execute_rw;
cmd->transport_complete_callback = &xdreadwrite_callback;
if (cdb[1] & 0x8)
cmd->se_cmd_flags |= SCF_FUA;
@@ -486,6 +495,7 @@ int sbc_parse_cdb(struct se_cmd *cmd)
* Setup BIDI XOR callback to be run during after I/O
* completion.
*/
+ cmd->execute_cmd = ops->execute_rw;
cmd->transport_complete_callback = &xdreadwrite_callback;
if (cdb[1] & 0x8)
cmd->se_cmd_flags |= SCF_FUA;
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index be843aa..23a49c9 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1859,7 +1859,7 @@ EXPORT_SYMBOL(transport_generic_request_failure);
static void __target_execute_cmd(struct se_cmd *cmd)
{
- int error;
+ int error = 0;
spin_lock_irq(&cmd->t_state_lock);
cmd->transport_state |= (CMD_T_BUSY|CMD_T_SENT);
@@ -1867,10 +1867,6 @@ static void __target_execute_cmd(struct se_cmd *cmd)
if (cmd->execute_cmd)
error = cmd->execute_cmd(cmd);
- else {
- error = cmd->se_dev->transport->execute_cmd(cmd, cmd->t_data_sg,
- cmd->t_data_nents, cmd->data_direction);
- }
if (error) {
spin_lock_irq(&cmd->t_state_lock);
diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index 24d2004..9b4f2c9 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -26,8 +26,6 @@ struct se_subsystem_api {
int (*transport_complete)(struct se_cmd *cmd, struct scatterlist *);
int (*parse_cdb)(struct se_cmd *cmd);
- int (*execute_cmd)(struct se_cmd *, struct scatterlist *, u32,
- enum dma_data_direction);
int (*do_discard)(struct se_device *, sector_t, u32);
void (*do_sync_cache)(struct se_cmd *);
ssize_t (*check_configfs_dev_params)(struct se_hba *,
@@ -42,6 +40,10 @@ struct se_subsystem_api {
unsigned char *(*get_sense_buffer)(struct se_cmd *);
};
+struct spc_ops {
+ int (*execute_rw)(struct se_cmd *cmd);
+};
+
int transport_subsystem_register(struct se_subsystem_api *);
void transport_subsystem_release(struct se_subsystem_api *);
@@ -51,7 +53,7 @@ struct se_device *transport_add_device_to_core_hba(struct se_hba *,
void target_complete_cmd(struct se_cmd *, u8);
-int sbc_parse_cdb(struct se_cmd *cmd);
+int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops);
int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);