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target: pass the se_task to the CDB emulation callback

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We want to be able to handle all CDBs through it and remove hacks like
always using the first task in a CDB in target_report_luns.

Also rename the callback to ->execute_task to better describe its use.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Christoph Hellwig 2011-11-03 17:50:42 -04:00 committed by Nicholas Bellinger
parent 617c0e06c1
commit e76a35d6c8
8 changed files with 42 additions and 55 deletions
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6
drivers/target/target_core_alua.c
View File

@ -58,8 +58,9 @@ struct t10_alua_lu_gp *default_lu_gp;
*
* See spc4r17 section 6.27
*/
int core_emulate_report_target_port_groups(struct se_cmd *cmd)
int target_emulate_report_target_port_groups(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
struct se_port *port;
struct t10_alua_tg_pt_gp *tg_pt_gp;
@ -172,8 +173,9 @@ int core_emulate_report_target_port_groups(struct se_cmd *cmd)
*
* See spc4r17 section 6.35
*/
int core_emulate_set_target_port_groups(struct se_cmd *cmd)
int target_emulate_set_target_port_groups(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
struct se_subsystem_dev *su_dev = dev->se_sub_dev;
struct se_port *port, *l_port = cmd->se_lun->lun_sep;

4
drivers/target/target_core_alua.h
View File

@ -66,8 +66,8 @@ extern struct kmem_cache *t10_alua_lu_gp_mem_cache;
extern struct kmem_cache *t10_alua_tg_pt_gp_cache;
extern struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
extern int core_emulate_report_target_port_groups(struct se_cmd *);
extern int core_emulate_set_target_port_groups(struct se_cmd *);
extern int target_emulate_report_target_port_groups(struct se_task *);
extern int target_emulate_set_target_port_groups(struct se_task *);
extern int core_alua_check_nonop_delay(struct se_cmd *);
extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *,
struct se_device *, struct se_port *,

12
drivers/target/target_core_device.c
View File

@ -651,23 +651,15 @@ void core_dev_unexport(
lun->lun_se_dev = NULL;
}
int transport_core_report_lun_response(struct se_cmd *se_cmd)
int target_report_luns(struct se_task *se_task)
{
struct se_cmd *se_cmd = se_task->task_se_cmd;
struct se_dev_entry *deve;
struct se_lun *se_lun;
struct se_session *se_sess = se_cmd->se_sess;
struct se_task *se_task;
unsigned char *buf;
u32 cdb_offset = 0, lun_count = 0, offset = 8, i;
list_for_each_entry(se_task, &se_cmd->t_task_list, t_list)
break;
if (!se_task) {
pr_err("Unable to locate struct se_task for struct se_cmd\n");
return PYX_TRANSPORT_LU_COMM_FAILURE;
}
buf = transport_kmap_first_data_page(se_cmd);
/*

13
drivers/target/target_core_pr.c
View File

@ -198,8 +198,9 @@ static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd, int *ret)
return false;
}
int target_scsi2_reservation_release(struct se_cmd *cmd)
int target_scsi2_reservation_release(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
struct se_portal_group *tpg = sess->se_tpg;
@ -235,8 +236,9 @@ int target_scsi2_reservation_release(struct se_cmd *cmd)
return 0;
}
int target_scsi2_reservation_reserve(struct se_cmd *cmd)
int target_scsi2_reservation_reserve(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
struct se_portal_group *tpg = sess->se_tpg;
@ -3734,8 +3736,9 @@ static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb)
/*
* See spc4r17 section 6.14 Table 170
*/
int target_scsi3_emulate_pr_out(struct se_cmd *cmd)
int target_scsi3_emulate_pr_out(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
unsigned char *cdb = &cmd->t_task_cdb[0];
unsigned char *buf;
u64 res_key, sa_res_key;
@ -4203,8 +4206,10 @@ static int core_scsi3_pri_read_full_status(struct se_cmd *cmd)
return 0;
}
int target_scsi3_emulate_pr_in(struct se_cmd *cmd)
int target_scsi3_emulate_pr_in(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
/*
* Following spc2r20 5.5.1 Reservations overview:
*

8
drivers/target/target_core_pr.h
View File

@ -47,8 +47,8 @@ extern struct kmem_cache *t10_pr_reg_cache;
extern int core_pr_dump_initiator_port(struct t10_pr_registration *,
char *, u32);
extern int target_scsi2_reservation_release(struct se_cmd *cmd);
extern int target_scsi2_reservation_reserve(struct se_cmd *cmd);
extern int target_scsi2_reservation_release(struct se_task *task);
extern int target_scsi2_reservation_reserve(struct se_task *task);
extern int core_scsi3_alloc_aptpl_registration(
struct t10_reservation *, u64,
unsigned char *, unsigned char *, u32,
@ -63,8 +63,8 @@ extern unsigned char *core_scsi3_pr_dump_type(int);
extern int core_scsi3_check_cdb_abort_and_preempt(struct list_head *,
struct se_cmd *);
extern int target_scsi3_emulate_pr_in(struct se_cmd *cmd);
extern int target_scsi3_emulate_pr_out(struct se_cmd *cmd);
extern int target_scsi3_emulate_pr_in(struct se_task *task);
extern int target_scsi3_emulate_pr_out(struct se_task *task);
extern int core_setup_reservations(struct se_device *, int);
#endif /* TARGET_CORE_PR_H */

50
drivers/target/target_core_transport.c
View File

@ -2156,12 +2156,12 @@ check_depth:
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
/*
* The struct se_cmd->transport_emulate_cdb() function pointer is used
* The struct se_cmd->execute_task() function pointer is used
* to grab REPORT_LUNS and other CDBs we want to handle before they hit the
* struct se_subsystem_api->do_task() caller below.
*/
if (cmd->transport_emulate_cdb) {
error = cmd->transport_emulate_cdb(cmd);
if (cmd->execute_task) {
error = cmd->execute_task(task);
if (error != 0) {
cmd->transport_error_status = error;
spin_lock_irqsave(&cmd->t_state_lock, flags);
@ -2174,7 +2174,7 @@ check_depth:
goto check_depth;
}
/*
* Handle the successful completion for transport_emulate_cdb()
* Handle the successful completion for execute_task()
* for synchronous operation, following SCF_EMULATE_CDB_ASYNC
* Otherwise the caller is expected to complete the task with
* proper status.
@ -2795,12 +2795,10 @@ static int transport_generic_cmd_sequencer(
/*
* Check for emulated MI_REPORT_TARGET_PGS.
*/
if (cdb[1] == MI_REPORT_TARGET_PGS) {
cmd->transport_emulate_cdb =
(su_dev->t10_alua.alua_type ==
SPC3_ALUA_EMULATED) ?
core_emulate_report_target_port_groups :
NULL;
if (cdb[1] == MI_REPORT_TARGET_PGS &&
su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
cmd->execute_task =
target_emulate_report_target_port_groups;
}
size = (cdb[6] << 24) | (cdb[7] << 16) |
(cdb[8] << 8) | cdb[9];
@ -2843,13 +2841,13 @@ static int transport_generic_cmd_sequencer(
break;
case PERSISTENT_RESERVE_IN:
if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS)
cmd->transport_emulate_cdb = target_scsi3_emulate_pr_in;
cmd->execute_task = target_scsi3_emulate_pr_in;
size = (cdb[7] << 8) + cdb[8];
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
break;
case PERSISTENT_RESERVE_OUT:
if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS)
cmd->transport_emulate_cdb = target_scsi3_emulate_pr_out;
cmd->execute_task = target_scsi3_emulate_pr_out;
size = (cdb[7] << 8) + cdb[8];
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
break;
@ -2868,12 +2866,10 @@ static int transport_generic_cmd_sequencer(
*
* Check for emulated MO_SET_TARGET_PGS.
*/
if (cdb[1] == MO_SET_TARGET_PGS) {
cmd->transport_emulate_cdb =
(su_dev->t10_alua.alua_type ==
SPC3_ALUA_EMULATED) ?
core_emulate_set_target_port_groups :
NULL;
if (cdb[1] == MO_SET_TARGET_PGS &&
su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
cmd->execute_task =
target_emulate_set_target_port_groups;
}
size = (cdb[6] << 24) | (cdb[7] << 16) |
@ -2966,10 +2962,8 @@ static int transport_generic_cmd_sequencer(
* is running in SPC_PASSTHROUGH, and wants reservations
* emulation disabled.
*/
if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) {
cmd->transport_emulate_cdb =
target_scsi2_reservation_reserve;
}
if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH)
cmd->execute_task = target_scsi2_reservation_reserve;
cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
break;
case RELEASE:
@ -2983,10 +2977,8 @@ static int transport_generic_cmd_sequencer(
else
size = cmd->data_length;
if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) {
cmd->transport_emulate_cdb =
target_scsi2_reservation_release;
}
if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH)
cmd->execute_task = target_scsi2_reservation_release;
cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
break;
case SYNCHRONIZE_CACHE:
@ -3007,9 +2999,6 @@ static int transport_generic_cmd_sequencer(
size = transport_get_size(sectors, cdb, cmd);
cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
/*
* For TCM/pSCSI passthrough, skip cmd->transport_emulate_cdb()
*/
if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
break;
/*
@ -3086,8 +3075,7 @@ static int transport_generic_cmd_sequencer(
cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
break;
case REPORT_LUNS:
cmd->transport_emulate_cdb =
transport_core_report_lun_response;
cmd->execute_task = target_report_luns;
size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
/*
* Do implict HEAD_OF_QUEUE processing for REPORT_LUNS

2
include/target/target_core_base.h
View File

@ -457,7 +457,7 @@ struct se_cmd {
struct list_head se_cmd_list;
struct completion cmd_wait_comp;
struct target_core_fabric_ops *se_tfo;
int (*transport_emulate_cdb)(struct se_cmd *);
int (*execute_task)(struct se_task *);
void (*transport_complete_callback)(struct se_cmd *);
unsigned char *t_task_cdb;

2
include/target/target_core_device.h
View File

@ -17,7 +17,7 @@ extern int core_dev_export(struct se_device *, struct se_portal_group *,
struct se_lun *);
extern void core_dev_unexport(struct se_device *, struct se_portal_group *,
struct se_lun *);
extern int transport_core_report_lun_response(struct se_cmd *);
extern int target_report_luns(struct se_task *);
extern void se_release_device_for_hba(struct se_device *);
extern void se_release_vpd_for_dev(struct se_device *);
extern void se_clear_dev_ports(struct se_device *);