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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  target: use ->exectute_task for all CDB emulation
  target: remove SCF_EMULATE_CDB_ASYNC
  target: refactor transport_emulate_control_cdb
  target: pass the se_task to the CDB emulation callback
  target: split core_scsi3_emulate_pr
  target: split core_scsi2_emulate_crh
  target: Add generic active I/O shutdown logic
  target: add back error handling in transport_complete_task
  target/pscsi: blk_make_request() returns an ERR_PTR()
  target: Remove core TRANSPORT_FREE_CMD_INTR usage
  target: Make TFO->check_stop_free return free status
  iscsi-target: Fix non-immediate TMR handling
  iscsi-target: Add missing CMDSN_LOWER_THAN_EXP check in iscsit_handle_scsi_cmd
  target: Avoid double list_del for aborted se_tmr_req
  target: Minor cleanups to core_tmr_drain_tmr_list
  target: Fix wrong se_tmr being added to drain_tmr_list
  target: Fix incorrect se_cmd assignment in core_tmr_drain_tmr_list
  target: Check -ENOMEM to signal QUEUE_FULL from fabric callbacks
  tcm_loop: Add explict read buffer memset for SCF_SCSI_CONTROL_SG_IO_CDB
  target: Fix compile warning w/ missing module.h include
This commit is contained in:
Linus Torvalds 2011-11-06 19:00:42 -08:00
parent 02ebbbd481 5bda90c8f2
commit 6aad3738f6
18 changed files with 629 additions and 475 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/target/iscsi/iscsi_target.c
View File

@ -1079,7 +1079,9 @@ attach_cmd:
*/
if (!cmd->immediate_data) {
cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn);
if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
if (cmdsn_ret == CMDSN_LOWER_THAN_EXP)
return 0;
else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
return iscsit_add_reject_from_cmd(
ISCSI_REASON_PROTOCOL_ERROR,
1, 0, buf, cmd);
@ -1819,17 +1821,16 @@ attach:
int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn);
if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP)
out_of_order_cmdsn = 1;
else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) {
else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP)
return 0;
} else { /* (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) */
else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
return iscsit_add_reject_from_cmd(
ISCSI_REASON_PROTOCOL_ERROR,
1, 0, buf, cmd);
}
}
iscsit_ack_from_expstatsn(conn, hdr->exp_statsn);
if (out_of_order_cmdsn)
if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE))
return 0;
/*
* Found the referenced task, send to transport for processing.

23
drivers/target/loopback/tcm_loop.c
View File

@ -174,6 +174,24 @@ static int tcm_loop_new_cmd_map(struct se_cmd *se_cmd)
sgl_bidi = sdb->table.sgl;
sgl_bidi_count = sdb->table.nents;
}
/*
* Because some userspace code via scsi-generic do not memset their
* associated read buffers, go ahead and do that here for type
* SCF_SCSI_CONTROL_SG_IO_CDB. Also note that this is currently
* guaranteed to be a single SGL for SCF_SCSI_CONTROL_SG_IO_CDB
* by target core in transport_generic_allocate_tasks() ->
* transport_generic_cmd_sequencer().
*/
if (se_cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB &&
se_cmd->data_direction == DMA_FROM_DEVICE) {
struct scatterlist *sg = scsi_sglist(sc);
unsigned char *buf = kmap(sg_page(sg)) + sg->offset;
if (buf != NULL) {
memset(buf, 0, sg->length);
kunmap(sg_page(sg));
}
}
/* Tell the core about our preallocated memory */
ret = transport_generic_map_mem_to_cmd(se_cmd, scsi_sglist(sc),
@ -187,7 +205,7 @@ static int tcm_loop_new_cmd_map(struct se_cmd *se_cmd)
/*
* Called from struct target_core_fabric_ops->check_stop_free()
*/
static void tcm_loop_check_stop_free(struct se_cmd *se_cmd)
static int tcm_loop_check_stop_free(struct se_cmd *se_cmd)
{
/*
* Do not release struct se_cmd's containing a valid TMR
@ -195,12 +213,13 @@ static void tcm_loop_check_stop_free(struct se_cmd *se_cmd)
* with transport_generic_free_cmd().
*/
if (se_cmd->se_tmr_req)
return;
return 0;
/*
* Release the struct se_cmd, which will make a callback to release
* struct tcm_loop_cmd * in tcm_loop_deallocate_core_cmd()
*/
transport_generic_free_cmd(se_cmd, 0);
return 1;
}
static void tcm_loop_release_cmd(struct se_cmd *se_cmd)

11
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;
@ -164,6 +165,8 @@ int core_emulate_report_target_port_groups(struct se_cmd *cmd)
transport_kunmap_first_data_page(cmd);
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
return 0;
}
@ -172,8 +175,9 @@ 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;
@ -341,7 +345,8 @@ int core_emulate_set_target_port_groups(struct se_cmd *cmd)
out:
transport_kunmap_first_data_page(cmd);
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
return 0;
}

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 *,

216
drivers/target/target_core_cdb.c
View File

@ -32,6 +32,7 @@
#include <target/target_core_transport.h>
#include <target/target_core_fabric_ops.h>
#include "target_core_ua.h"
#include "target_core_cdb.h"
static void
target_fill_alua_data(struct se_port *port, unsigned char *buf)
@ -679,16 +680,18 @@ target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
return 0;
}
static int
target_emulate_inquiry(struct se_cmd *cmd)
int target_emulate_inquiry(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
unsigned char *buf;
unsigned char *cdb = cmd->t_task_cdb;
int p, ret;
if (!(cdb[1] & 0x1))
return target_emulate_inquiry_std(cmd);
if (!(cdb[1] & 0x1)) {
ret = target_emulate_inquiry_std(cmd);
goto out;
}
/*
* Make sure we at least have 4 bytes of INQUIRY response
@ -707,22 +710,30 @@ target_emulate_inquiry(struct se_cmd *cmd)
buf[0] = dev->transport->get_device_type(dev);
for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
if (cdb[2] == evpd_handlers[p].page) {
buf[1] = cdb[2];
ret = evpd_handlers[p].emulate(cmd, buf);
transport_kunmap_first_data_page(cmd);
return ret;
goto out_unmap;
}
}
transport_kunmap_first_data_page(cmd);
pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
return -EINVAL;
ret = -EINVAL;
out_unmap:
transport_kunmap_first_data_page(cmd);
out:
if (!ret) {
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
}
return ret;
}
static int
target_emulate_readcapacity(struct se_cmd *cmd)
int target_emulate_readcapacity(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
unsigned char *buf;
unsigned long long blocks_long = dev->transport->get_blocks(dev);
@ -751,12 +762,14 @@ target_emulate_readcapacity(struct se_cmd *cmd)
transport_kunmap_first_data_page(cmd);
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
return 0;
}
static int
target_emulate_readcapacity_16(struct se_cmd *cmd)
int target_emulate_readcapacity_16(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
unsigned char *buf;
unsigned long long blocks = dev->transport->get_blocks(dev);
@ -784,6 +797,8 @@ target_emulate_readcapacity_16(struct se_cmd *cmd)
transport_kunmap_first_data_page(cmd);
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
return 0;
}
@ -922,14 +937,15 @@ target_modesense_dpofua(unsigned char *buf, int type)
}
}
static int
target_emulate_modesense(struct se_cmd *cmd, int ten)
int target_emulate_modesense(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
char *cdb = cmd->t_task_cdb;
unsigned char *rbuf;
int type = dev->transport->get_device_type(dev);
int offset = (ten) ? 8 : 4;
int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
int offset = ten ? 8 : 4;
int length = 0;
unsigned char buf[SE_MODE_PAGE_BUF];
@ -995,12 +1011,14 @@ target_emulate_modesense(struct se_cmd *cmd, int ten)
memcpy(rbuf, buf, offset);
transport_kunmap_first_data_page(cmd);
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
return 0;
}
static int
target_emulate_request_sense(struct se_cmd *cmd)
int target_emulate_request_sense(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
unsigned char *cdb = cmd->t_task_cdb;
unsigned char *buf;
u8 ua_asc = 0, ua_ascq = 0;
@ -1059,7 +1077,8 @@ target_emulate_request_sense(struct se_cmd *cmd)
end:
transport_kunmap_first_data_page(cmd);
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
return 0;
}
@ -1067,8 +1086,7 @@ end:
* Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
* Note this is not used for TCM/pSCSI passthrough
*/
static int
target_emulate_unmap(struct se_task *task)
int target_emulate_unmap(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
@ -1079,6 +1097,12 @@ target_emulate_unmap(struct se_task *task)
int ret = 0, offset;
unsigned short dl, bd_dl;
if (!dev->transport->do_discard) {
pr_err("UNMAP emulation not supported for: %s\n",
dev->transport->name);
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
}
/* First UNMAP block descriptor starts at 8 byte offset */
offset = 8;
size -= 8;
@ -1110,7 +1134,10 @@ target_emulate_unmap(struct se_task *task)
err:
transport_kunmap_first_data_page(cmd);
if (!ret) {
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
}
return ret;
}
@ -1118,14 +1145,28 @@ err:
* Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
* Note this is not used for TCM/pSCSI passthrough
*/
static int
target_emulate_write_same(struct se_task *task, u32 num_blocks)
int target_emulate_write_same(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
sector_t range;
sector_t lba = cmd->t_task_lba;
u32 num_blocks;
int ret;
if (!dev->transport->do_discard) {
pr_err("WRITE_SAME emulation not supported"
" for: %s\n", dev->transport->name);
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
}
if (cmd->t_task_cdb[0] == WRITE_SAME)
num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]);
else if (cmd->t_task_cdb[0] == WRITE_SAME_16)
num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]);
else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */
num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]);
/*
* Use the explicit range when non zero is supplied, otherwise calculate
* the remaining range based on ->get_blocks() - starting LBA.
@ -1144,127 +1185,30 @@ target_emulate_write_same(struct se_task *task, u32 num_blocks)
return ret;
}
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
return 0;
}
int
transport_emulate_control_cdb(struct se_task *task)
int target_emulate_synchronize_cache(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
unsigned short service_action;
int ret = 0;
struct se_device *dev = task->task_se_cmd->se_dev;
switch (cmd->t_task_cdb[0]) {
case INQUIRY:
ret = target_emulate_inquiry(cmd);
break;
case READ_CAPACITY:
ret = target_emulate_readcapacity(cmd);
break;
case MODE_SENSE:
ret = target_emulate_modesense(cmd, 0);
break;
case MODE_SENSE_10:
ret = target_emulate_modesense(cmd, 1);
break;
case SERVICE_ACTION_IN:
switch (cmd->t_task_cdb[1] & 0x1f) {
case SAI_READ_CAPACITY_16:
ret = target_emulate_readcapacity_16(cmd);
break;
default:
pr_err("Unsupported SA: 0x%02x\n",
cmd->t_task_cdb[1] & 0x1f);
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
}
break;
case REQUEST_SENSE:
ret = target_emulate_request_sense(cmd);
break;
case UNMAP:
if (!dev->transport->do_discard) {
pr_err("UNMAP emulation not supported for: %s\n",
dev->transport->name);
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
}
ret = target_emulate_unmap(task);
break;
case WRITE_SAME:
if (!dev->transport->do_discard) {
pr_err("WRITE_SAME emulation not supported"
" for: %s\n", dev->transport->name);
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
}
ret = target_emulate_write_same(task,
get_unaligned_be16(&cmd->t_task_cdb[7]));
break;
case WRITE_SAME_16:
if (!dev->transport->do_discard) {
pr_err("WRITE_SAME_16 emulation not supported"
" for: %s\n", dev->transport->name);
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
}
ret = target_emulate_write_same(task,
get_unaligned_be32(&cmd->t_task_cdb[10]));
break;
case VARIABLE_LENGTH_CMD:
service_action =
get_unaligned_be16(&cmd->t_task_cdb[8]);
switch (service_action) {
case WRITE_SAME_32:
if (!dev->transport->do_discard) {
pr_err("WRITE_SAME_32 SA emulation not"
" supported for: %s\n",
dev->transport->name);
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
}
ret = target_emulate_write_same(task,
get_unaligned_be32(&cmd->t_task_cdb[28]));
break;
default:
pr_err("Unsupported VARIABLE_LENGTH_CMD SA:"
" 0x%02x\n", service_action);
break;
}
break;
case SYNCHRONIZE_CACHE:
case 0x91: /* SYNCHRONIZE_CACHE_16: */
if (!dev->transport->do_sync_cache) {
pr_err("SYNCHRONIZE_CACHE emulation not supported"
" for: %s\n", dev->transport->name);
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
}
dev->transport->do_sync_cache(task);
break;
case ALLOW_MEDIUM_REMOVAL:
case ERASE:
case REZERO_UNIT:
case SEEK_10:
case SPACE:
case START_STOP:
case TEST_UNIT_READY:
case VERIFY:
case WRITE_FILEMARKS:
break;
default:
pr_err("Unsupported SCSI Opcode: 0x%02x for %s\n",
cmd->t_task_cdb[0], dev->transport->name);
if (!dev->transport->do_sync_cache) {
pr_err("SYNCHRONIZE_CACHE emulation not supported"
" for: %s\n", dev->transport->name);
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
}
if (ret < 0)
return ret;
/*
* Handle the successful completion here unless a caller
* has explictly requested an asychronous completion.
*/
if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) {
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
}
dev->transport->do_sync_cache(task);
return 0;
}
return PYX_TRANSPORT_SENT_TO_TRANSPORT;
int target_emulate_noop(struct se_task *task)
{
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
return 0;
}
/*

14
drivers/target/target_core_cdb.h Normal file
View File

@ -0,0 +1,14 @@
#ifndef TARGET_CORE_CDB_H
#define TARGET_CORE_CDB_H
int target_emulate_inquiry(struct se_task *task);
int target_emulate_readcapacity(struct se_task *task);
int target_emulate_readcapacity_16(struct se_task *task);
int target_emulate_modesense(struct se_task *task);
int target_emulate_request_sense(struct se_task *task);
int target_emulate_unmap(struct se_task *task);
int target_emulate_write_same(struct se_task *task);
int target_emulate_synchronize_cache(struct se_task *task);
int target_emulate_noop(struct se_task *task);
#endif /* TARGET_CORE_CDB_H */

14
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);
/*
@ -713,6 +705,8 @@ done:
buf[2] = ((lun_count >> 8) & 0xff);
buf[3] = (lun_count & 0xff);
se_task->task_scsi_status = GOOD;
transport_complete_task(se_task, 1);
return PYX_TRANSPORT_SENT_TO_TRANSPORT;
}

349
drivers/target/target_core_pr.c
View File

@ -116,114 +116,21 @@ static int core_scsi2_reservation_check(struct se_cmd *cmd, u32 *pr_reg_type)
return ret;
}
static int core_scsi2_reservation_release(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
struct se_portal_group *tpg = sess->se_tpg;
if (!sess || !tpg)
return 0;
spin_lock(&dev->dev_reservation_lock);
if (!dev->dev_reserved_node_acl || !sess) {
spin_unlock(&dev->dev_reservation_lock);
return 0;
}
if (dev->dev_reserved_node_acl != sess->se_node_acl) {
spin_unlock(&dev->dev_reservation_lock);
return 0;
}
dev->dev_reserved_node_acl = NULL;
dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) {
dev->dev_res_bin_isid = 0;
dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID;
}
pr_debug("SCSI-2 Released reservation for %s LUN: %u ->"
" MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
sess->se_node_acl->initiatorname);
spin_unlock(&dev->dev_reservation_lock);
return 0;
}
static int core_scsi2_reservation_reserve(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
struct se_portal_group *tpg = sess->se_tpg;
if ((cmd->t_task_cdb[1] & 0x01) &&
(cmd->t_task_cdb[1] & 0x02)) {
pr_err("LongIO and Obselete Bits set, returning"
" ILLEGAL_REQUEST\n");
return PYX_TRANSPORT_ILLEGAL_REQUEST;
}
/*
* This is currently the case for target_core_mod passthrough struct se_cmd
* ops
*/
if (!sess || !tpg)
return 0;
spin_lock(&dev->dev_reservation_lock);
if (dev->dev_reserved_node_acl &&
(dev->dev_reserved_node_acl != sess->se_node_acl)) {
pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n",
tpg->se_tpg_tfo->get_fabric_name());
pr_err("Original reserver LUN: %u %s\n",
cmd->se_lun->unpacked_lun,
dev->dev_reserved_node_acl->initiatorname);
pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u"
" from %s \n", cmd->se_lun->unpacked_lun,
cmd->se_deve->mapped_lun,
sess->se_node_acl->initiatorname);
spin_unlock(&dev->dev_reservation_lock);
return PYX_TRANSPORT_RESERVATION_CONFLICT;
}
dev->dev_reserved_node_acl = sess->se_node_acl;
dev->dev_flags |= DF_SPC2_RESERVATIONS;
if (sess->sess_bin_isid != 0) {
dev->dev_res_bin_isid = sess->sess_bin_isid;
dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID;
}
pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u"
" for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
sess->se_node_acl->initiatorname);
spin_unlock(&dev->dev_reservation_lock);
return 0;
}
static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *,
struct se_node_acl *, struct se_session *);
static void core_scsi3_put_pr_reg(struct t10_pr_registration *);
/*
* Setup in target_core_transport.c:transport_generic_cmd_sequencer()
* and called via struct se_cmd->transport_emulate_cdb() in TCM processing
* thread context.
*/
int core_scsi2_emulate_crh(struct se_cmd *cmd)
static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd, int *ret)
{
struct se_session *se_sess = cmd->se_sess;
struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
struct t10_pr_registration *pr_reg;
struct t10_reservation *pr_tmpl = &su_dev->t10_pr;
unsigned char *cdb = &cmd->t_task_cdb[0];
int crh = (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS);
int conflict = 0;
if (!se_sess)
return 0;
if (!crh)
goto after_crh;
return false;
pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
se_sess);
@ -251,14 +158,16 @@ int core_scsi2_emulate_crh(struct se_cmd *cmd)
*/
if (pr_reg->pr_res_holder) {
core_scsi3_put_pr_reg(pr_reg);
return 0;
*ret = 0;
return false;
}
if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) ||
(pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) ||
(pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
(pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
core_scsi3_put_pr_reg(pr_reg);
return 0;
*ret = 0;
return true;
}
core_scsi3_put_pr_reg(pr_reg);
conflict = 1;
@ -282,18 +191,118 @@ int core_scsi2_emulate_crh(struct se_cmd *cmd)
pr_err("Received legacy SPC-2 RESERVE/RELEASE"
" while active SPC-3 registrations exist,"
" returning RESERVATION_CONFLICT\n");
return PYX_TRANSPORT_RESERVATION_CONFLICT;
*ret = PYX_TRANSPORT_RESERVATION_CONFLICT;
return true;
}
after_crh:
if ((cdb[0] == RESERVE) || (cdb[0] == RESERVE_10))
return core_scsi2_reservation_reserve(cmd);
else if ((cdb[0] == RELEASE) || (cdb[0] == RELEASE_10))
return core_scsi2_reservation_release(cmd);
else
return PYX_TRANSPORT_INVALID_CDB_FIELD;
return false;
}
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;
int ret = 0;
if (!sess || !tpg)
goto out;
if (target_check_scsi2_reservation_conflict(cmd, &ret))
goto out;
ret = 0;
spin_lock(&dev->dev_reservation_lock);
if (!dev->dev_reserved_node_acl || !sess)
goto out_unlock;
if (dev->dev_reserved_node_acl != sess->se_node_acl)
goto out_unlock;
dev->dev_reserved_node_acl = NULL;
dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) {
dev->dev_res_bin_isid = 0;
dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID;
}
pr_debug("SCSI-2 Released reservation for %s LUN: %u ->"
" MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
sess->se_node_acl->initiatorname);
out_unlock:
spin_unlock(&dev->dev_reservation_lock);
out:
if (!ret) {
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
}
return ret;
}
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;
int ret = 0;
if ((cmd->t_task_cdb[1] & 0x01) &&
(cmd->t_task_cdb[1] & 0x02)) {
pr_err("LongIO and Obselete Bits set, returning"
" ILLEGAL_REQUEST\n");
ret = PYX_TRANSPORT_ILLEGAL_REQUEST;
goto out;
}
/*
* This is currently the case for target_core_mod passthrough struct se_cmd
* ops
*/
if (!sess || !tpg)
goto out;
if (target_check_scsi2_reservation_conflict(cmd, &ret))
goto out;
ret = 0;
spin_lock(&dev->dev_reservation_lock);
if (dev->dev_reserved_node_acl &&
(dev->dev_reserved_node_acl != sess->se_node_acl)) {
pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n",
tpg->se_tpg_tfo->get_fabric_name());
pr_err("Original reserver LUN: %u %s\n",
cmd->se_lun->unpacked_lun,
dev->dev_reserved_node_acl->initiatorname);
pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u"
" from %s \n", cmd->se_lun->unpacked_lun,
cmd->se_deve->mapped_lun,
sess->se_node_acl->initiatorname);
ret = PYX_TRANSPORT_RESERVATION_CONFLICT;
goto out_unlock;
}
dev->dev_reserved_node_acl = sess->se_node_acl;
dev->dev_flags |= DF_SPC2_RESERVATIONS;
if (sess->sess_bin_isid != 0) {
dev->dev_res_bin_isid = sess->sess_bin_isid;
dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID;
}
pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u"
" for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
sess->se_node_acl->initiatorname);
out_unlock:
spin_unlock(&dev->dev_reservation_lock);
out:
if (!ret) {
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
}
return ret;
}
/*
* Begin SPC-3/SPC-4 Persistent Reservations emulation support
*
@ -418,12 +427,12 @@ static int core_scsi3_pr_seq_non_holder(
break;
case RELEASE:
case RELEASE_10:
/* Handled by CRH=1 in core_scsi2_emulate_crh() */
/* Handled by CRH=1 in target_scsi2_reservation_release() */
ret = 0;
break;
case RESERVE:
case RESERVE_10:
/* Handled by CRH=1 in core_scsi2_emulate_crh() */
/* Handled by CRH=1 in target_scsi2_reservation_reserve() */
ret = 0;
break;
case TEST_UNIT_READY:
@ -3739,12 +3748,33 @@ static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb)
/*
* See spc4r17 section 6.14 Table 170
*/
static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb)
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;
int sa, scope, type, aptpl;
int spec_i_pt = 0, all_tg_pt = 0, unreg = 0;
int ret;
/*
* Following spc2r20 5.5.1 Reservations overview:
*
* If a logical unit has been reserved by any RESERVE command and is
* still reserved by any initiator, all PERSISTENT RESERVE IN and all
* PERSISTENT RESERVE OUT commands shall conflict regardless of
* initiator or service action and shall terminate with a RESERVATION
* CONFLICT status.
*/
if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) {
pr_err("Received PERSISTENT_RESERVE CDB while legacy"
" SPC-2 reservation is held, returning"
" RESERVATION_CONFLICT\n");
ret = PYX_TRANSPORT_RESERVATION_CONFLICT;
goto out;
}
/*
* FIXME: A NULL struct se_session pointer means an this is not coming from
* a $FABRIC_MOD's nexus, but from internal passthrough ops.
@ -3755,7 +3785,8 @@ static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb)
if (cmd->data_length < 24) {
pr_warn("SPC-PR: Received PR OUT parameter list"
" length too small: %u\n", cmd->data_length);
return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
goto out;
}
/*
* From the PERSISTENT_RESERVE_OUT command descriptor block (CDB)
@ -3788,8 +3819,11 @@ static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb)
/*
* SPEC_I_PT=1 is only valid for Service action: REGISTER
*/
if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER))
return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) {
ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
goto out;
}
/*
* From spc4r17 section 6.14:
*
@ -3803,7 +3837,8 @@ static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb)
(cmd->data_length != 24)) {
pr_warn("SPC-PR: Received PR OUT illegal parameter"
" list length: %u\n", cmd->data_length);
return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
goto out;
}
/*
* (core_scsi3_emulate_pro_* function parameters
@ -3812,35 +3847,47 @@ static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb)
*/
switch (sa) {
case PRO_REGISTER:
return core_scsi3_emulate_pro_register(cmd,
ret = core_scsi3_emulate_pro_register(cmd,
res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0);
break;
case PRO_RESERVE:
return core_scsi3_emulate_pro_reserve(cmd,
type, scope, res_key);
ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key);
break;
case PRO_RELEASE:
return core_scsi3_emulate_pro_release(cmd,
type, scope, res_key);
ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key);
break;
case PRO_CLEAR:
return core_scsi3_emulate_pro_clear(cmd, res_key);
ret = core_scsi3_emulate_pro_clear(cmd, res_key);
break;
case PRO_PREEMPT:
return core_scsi3_emulate_pro_preempt(cmd, type, scope,
ret = core_scsi3_emulate_pro_preempt(cmd, type, scope,
res_key, sa_res_key, 0);
break;
case PRO_PREEMPT_AND_ABORT:
return core_scsi3_emulate_pro_preempt(cmd, type, scope,
ret = core_scsi3_emulate_pro_preempt(cmd, type, scope,
res_key, sa_res_key, 1);
break;
case PRO_REGISTER_AND_IGNORE_EXISTING_KEY:
return core_scsi3_emulate_pro_register(cmd,
ret = core_scsi3_emulate_pro_register(cmd,
0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1);
break;
case PRO_REGISTER_AND_MOVE:
return core_scsi3_emulate_pro_register_and_move(cmd, res_key,
ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key,
sa_res_key, aptpl, unreg);
break;
default:
pr_err("Unknown PERSISTENT_RESERVE_OUT service"
" action: 0x%02x\n", cdb[1] & 0x1f);
return PYX_TRANSPORT_INVALID_CDB_FIELD;
ret = PYX_TRANSPORT_INVALID_CDB_FIELD;
break;
}
return PYX_TRANSPORT_INVALID_CDB_FIELD;
out:
if (!ret) {
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
}
return ret;
}
/*
@ -4190,29 +4237,11 @@ static int core_scsi3_pri_read_full_status(struct se_cmd *cmd)
return 0;
}
static int core_scsi3_emulate_pr_in(struct se_cmd *cmd, unsigned char *cdb)
int target_scsi3_emulate_pr_in(struct se_task *task)
{
switch (cdb[1] & 0x1f) {
case PRI_READ_KEYS:
return core_scsi3_pri_read_keys(cmd);
case PRI_READ_RESERVATION:
return core_scsi3_pri_read_reservation(cmd);
case PRI_REPORT_CAPABILITIES:
return core_scsi3_pri_report_capabilities(cmd);
case PRI_READ_FULL_STATUS:
return core_scsi3_pri_read_full_status(cmd);
default:
pr_err("Unknown PERSISTENT_RESERVE_IN service"
" action: 0x%02x\n", cdb[1] & 0x1f);
return PYX_TRANSPORT_INVALID_CDB_FIELD;
}
struct se_cmd *cmd = task->task_se_cmd;
int ret;
}
int core_scsi3_emulate_pr(struct se_cmd *cmd)
{
unsigned char *cdb = &cmd->t_task_cdb[0];
struct se_device *dev = cmd->se_dev;
/*
* Following spc2r20 5.5.1 Reservations overview:
*
@ -4222,16 +4251,38 @@ int core_scsi3_emulate_pr(struct se_cmd *cmd)
* initiator or service action and shall terminate with a RESERVATION
* CONFLICT status.
*/
if (dev->dev_flags & DF_SPC2_RESERVATIONS) {
if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) {
pr_err("Received PERSISTENT_RESERVE CDB while legacy"
" SPC-2 reservation is held, returning"
" RESERVATION_CONFLICT\n");
return PYX_TRANSPORT_RESERVATION_CONFLICT;
}
return (cdb[0] == PERSISTENT_RESERVE_OUT) ?
core_scsi3_emulate_pr_out(cmd, cdb) :
core_scsi3_emulate_pr_in(cmd, cdb);
switch (cmd->t_task_cdb[1] & 0x1f) {
case PRI_READ_KEYS:
ret = core_scsi3_pri_read_keys(cmd);
break;
case PRI_READ_RESERVATION:
ret = core_scsi3_pri_read_reservation(cmd);
break;
case PRI_REPORT_CAPABILITIES:
ret = core_scsi3_pri_report_capabilities(cmd);
break;
case PRI_READ_FULL_STATUS:
ret = core_scsi3_pri_read_full_status(cmd);
break;
default:
pr_err("Unknown PERSISTENT_RESERVE_IN service"
" action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f);
ret = PYX_TRANSPORT_INVALID_CDB_FIELD;
break;
}
if (!ret) {
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
}
return ret;
}
static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type)

7
drivers/target/target_core_pr.h
View File

@ -47,7 +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 core_scsi2_emulate_crh(struct se_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,
@ -61,7 +62,9 @@ extern void core_scsi3_free_all_registrations(struct se_device *);
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 core_scsi3_emulate_pr(struct se_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 */

2
drivers/target/target_core_pscsi.c
View File

@ -1091,7 +1091,7 @@ static int pscsi_do_task(struct se_task *task)
req = blk_make_request(pdv->pdv_sd->request_queue, hbio,
GFP_KERNEL);
if (!req) {
if (IS_ERR(req)) {
pr_err("pSCSI: blk_make_request() failed\n");
goto fail;
}

23
drivers/target/target_core_tmr.c
View File

@ -118,7 +118,7 @@ static void core_tmr_drain_tmr_list(
/*
* Allow the received TMR to return with FUNCTION_COMPLETE.
*/
if (tmr && (tmr_p == tmr))
if (tmr_p == tmr)
continue;
cmd = tmr_p->task_cmd;
@ -147,19 +147,18 @@ static void core_tmr_drain_tmr_list(
}
spin_unlock(&cmd->t_state_lock);
list_move_tail(&tmr->tmr_list, &drain_tmr_list);
list_move_tail(&tmr_p->tmr_list, &drain_tmr_list);
}
spin_unlock_irqrestore(&dev->se_tmr_lock, flags);
while (!list_empty(&drain_tmr_list)) {
tmr = list_entry(drain_tmr_list.next, struct se_tmr_req, tmr_list);
list_del(&tmr->tmr_list);
list_for_each_entry_safe(tmr_p, tmr_pp, &drain_tmr_list, tmr_list) {
list_del_init(&tmr_p->tmr_list);
cmd = tmr_p->task_cmd;
pr_debug("LUN_RESET: %s releasing TMR %p Function: 0x%02x,"
" Response: 0x%02x, t_state: %d\n",
(preempt_and_abort_list) ? "Preempt" : "", tmr,
tmr->function, tmr->response, cmd->t_state);
(preempt_and_abort_list) ? "Preempt" : "", tmr_p,
tmr_p->function, tmr_p->response, cmd->t_state);
transport_cmd_finish_abort(cmd, 1);
}
@ -330,16 +329,6 @@ static void core_tmr_drain_cmd_list(
*/
if (prout_cmd == cmd)
continue;
/*
* Skip direct processing of TRANSPORT_FREE_CMD_INTR for
* HW target mode fabrics.
*/
spin_lock(&cmd->t_state_lock);
if (cmd->t_state == TRANSPORT_FREE_CMD_INTR) {
spin_unlock(&cmd->t_state_lock);
continue;
}
spin_unlock(&cmd->t_state_lock);
atomic_set(&cmd->t_transport_queue_active, 0);
atomic_dec(&qobj->queue_cnt);

392
drivers/target/target_core_transport.c
View File

@ -52,6 +52,7 @@
#include <target/target_core_configfs.h>
#include "target_core_alua.h"
#include "target_core_cdb.h"
#include "target_core_hba.h"
#include "target_core_pr.h"
#include "target_core_ua.h"
@ -268,6 +269,9 @@ struct se_session *transport_init_session(void)
}
INIT_LIST_HEAD(&se_sess->sess_list);
INIT_LIST_HEAD(&se_sess->sess_acl_list);
INIT_LIST_HEAD(&se_sess->sess_cmd_list);
INIT_LIST_HEAD(&se_sess->sess_wait_list);
spin_lock_init(&se_sess->sess_cmd_lock);
return se_sess;
}
@ -514,13 +518,16 @@ static int transport_cmd_check_stop(
* Some fabric modules like tcm_loop can release
* their internally allocated I/O reference now and
* struct se_cmd now.
*
* Fabric modules are expected to return '1' here if the
* se_cmd being passed is released at this point,
* or zero if not being released.
*/
if (cmd->se_tfo->check_stop_free != NULL) {
spin_unlock_irqrestore(
&cmd->t_state_lock, flags);
cmd->se_tfo->check_stop_free(cmd);
return 1;
return cmd->se_tfo->check_stop_free(cmd);
}
}
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
@ -730,6 +737,10 @@ void transport_complete_task(struct se_task *task, int success)
complete(&task->task_stop_comp);
return;
}
if (!success)
cmd->t_tasks_failed = 1;
/*
* Decrement the outstanding t_task_cdbs_left count. The last
* struct se_task from struct se_cmd will complete itself into the
@ -740,7 +751,7 @@ void transport_complete_task(struct se_task *task, int success)
return;
}
if (!success || cmd->t_tasks_failed) {
if (cmd->t_tasks_failed) {
if (!task->task_error_status) {
task->task_error_status =
PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
@ -908,7 +919,7 @@ void transport_remove_task_from_execute_queue(
}
/*
* Handle QUEUE_FULL / -EAGAIN status
* Handle QUEUE_FULL / -EAGAIN and -ENOMEM status
*/
static void target_qf_do_work(struct work_struct *work)
@ -1498,11 +1509,12 @@ void transport_init_se_cmd(
INIT_LIST_HEAD(&cmd->se_ordered_node);
INIT_LIST_HEAD(&cmd->se_qf_node);
INIT_LIST_HEAD(&cmd->se_queue_node);
INIT_LIST_HEAD(&cmd->se_cmd_list);
INIT_LIST_HEAD(&cmd->t_task_list);
init_completion(&cmd->transport_lun_fe_stop_comp);
init_completion(&cmd->transport_lun_stop_comp);
init_completion(&cmd->t_transport_stop_comp);
init_completion(&cmd->cmd_wait_comp);
spin_lock_init(&cmd->t_state_lock);
atomic_set(&cmd->transport_dev_active, 1);
@ -1645,9 +1657,7 @@ int transport_handle_cdb_direct(
* and call transport_generic_request_failure() if necessary..
*/
ret = transport_generic_new_cmd(cmd);
if (ret == -EAGAIN)
return 0;
else if (ret < 0) {
if (ret < 0) {
cmd->transport_error_status = ret;
transport_generic_request_failure(cmd, 0,
(cmd->data_direction != DMA_TO_DEVICE));
@ -1717,13 +1727,6 @@ int transport_generic_handle_tmr(
}
EXPORT_SYMBOL(transport_generic_handle_tmr);
void transport_generic_free_cmd_intr(
struct se_cmd *cmd)
{
transport_add_cmd_to_queue(cmd, TRANSPORT_FREE_CMD_INTR, false);
}
EXPORT_SYMBOL(transport_generic_free_cmd_intr);
/*
* If the task is active, request it to be stopped and sleep until it
* has completed.
@ -1886,7 +1889,7 @@ static void transport_generic_request_failure(
ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
ret = cmd->se_tfo->queue_status(cmd);
if (ret == -EAGAIN)
if (ret == -EAGAIN || ret == -ENOMEM)
goto queue_full;
goto check_stop;
case PYX_TRANSPORT_USE_SENSE_REASON:
@ -1913,7 +1916,7 @@ static void transport_generic_request_failure(
else {
ret = transport_send_check_condition_and_sense(cmd,
cmd->scsi_sense_reason, 0);
if (ret == -EAGAIN)
if (ret == -EAGAIN || ret == -ENOMEM)
goto queue_full;
}
@ -2153,62 +2156,20 @@ check_depth:
atomic_set(&cmd->t_transport_sent, 1);
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
/*
* The struct se_cmd->transport_emulate_cdb() 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 (error != 0) {
cmd->transport_error_status = error;
spin_lock_irqsave(&cmd->t_state_lock, flags);
task->task_flags &= ~TF_ACTIVE;
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
atomic_set(&cmd->t_transport_sent, 0);
transport_stop_tasks_for_cmd(cmd);
atomic_inc(&dev->depth_left);
transport_generic_request_failure(cmd, 0, 1);
goto check_depth;
}
/*
* Handle the successful completion for transport_emulate_cdb()
* for synchronous operation, following SCF_EMULATE_CDB_ASYNC
* Otherwise the caller is expected to complete the task with
* proper status.
*/
if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) {
cmd->scsi_status = SAM_STAT_GOOD;
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
}
} else {
/*
* Currently for all virtual TCM plugins including IBLOCK, FILEIO and
* RAMDISK we use the internal transport_emulate_control_cdb() logic
* with struct se_subsystem_api callers for the primary SPC-3 TYPE_DISK
* LUN emulation code.
*
* For TCM/pSCSI and all other SCF_SCSI_DATA_SG_IO_CDB I/O tasks we
* call ->do_task() directly and let the underlying TCM subsystem plugin
* code handle the CDB emulation.
*/
if ((dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) &&
(!(task->task_se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)))
error = transport_emulate_control_cdb(task);
else
error = dev->transport->do_task(task);
if (error != 0) {
cmd->transport_error_status = error;
spin_lock_irqsave(&cmd->t_state_lock, flags);
task->task_flags &= ~TF_ACTIVE;
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
atomic_set(&cmd->t_transport_sent, 0);
transport_stop_tasks_for_cmd(cmd);
atomic_inc(&dev->depth_left);
transport_generic_request_failure(cmd, 0, 1);
}
if (cmd->execute_task)
error = cmd->execute_task(task);
else
error = dev->transport->do_task(task);
if (error != 0) {
cmd->transport_error_status = error;
spin_lock_irqsave(&cmd->t_state_lock, flags);
task->task_flags &= ~TF_ACTIVE;
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
atomic_set(&cmd->t_transport_sent, 0);
transport_stop_tasks_for_cmd(cmd);
atomic_inc(&dev->depth_left);
transport_generic_request_failure(cmd, 0, 1);
}
goto check_depth;
@ -2642,6 +2603,13 @@ static int transport_generic_cmd_sequencer(
*/
}
/*
* If we operate in passthrough mode we skip most CDB emulation and
* instead hand the commands down to the physical SCSI device.
*/
passthrough =
(dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV);
switch (cdb[0]) {
case READ_6:
sectors = transport_get_sectors_6(cdb, cmd, &sector_ret);
@ -2721,9 +2689,12 @@ static int transport_generic_cmd_sequencer(
cmd->t_task_lba = transport_lba_32(cdb);
cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
if (dev->transport->transport_type ==
TRANSPORT_PLUGIN_PHBA_PDEV)
/*
* Do now allow BIDI commands for passthrough mode.
*/
if (passthrough)
goto out_unsupported_cdb;
/*
* Setup BIDI XOR callback to be run after I/O completion.
*/
@ -2732,13 +2703,6 @@ static int transport_generic_cmd_sequencer(
break;
case VARIABLE_LENGTH_CMD:
service_action = get_unaligned_be16(&cdb[8]);
/*
* Determine if this is TCM/PSCSI device and we should disable
* internal emulation for this CDB.
*/
passthrough = (dev->transport->transport_type ==
TRANSPORT_PLUGIN_PHBA_PDEV);
switch (service_action) {
case XDWRITEREAD_32:
sectors = transport_get_sectors_32(cdb, cmd, &sector_ret);
@ -2752,8 +2716,12 @@ static int transport_generic_cmd_sequencer(
cmd->t_task_lba = transport_lba_64_ext(cdb);
cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
/*
* Do now allow BIDI commands for passthrough mode.
*/
if (passthrough)
goto out_unsupported_cdb;
/*
* Setup BIDI XOR callback to be run during after I/O
* completion.
@ -2779,7 +2747,8 @@ static int transport_generic_cmd_sequencer(
if (target_check_write_same_discard(&cdb[10], dev) < 0)
goto out_invalid_cdb_field;
if (!passthrough)
cmd->execute_task = target_emulate_write_same;
break;
default:
pr_err("VARIABLE_LENGTH_CMD service action"
@ -2793,12 +2762,10 @@ 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];
@ -2819,8 +2786,15 @@ static int transport_generic_cmd_sequencer(
case MODE_SENSE:
size = cdb[4];
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
if (!passthrough)
cmd->execute_task = target_emulate_modesense;
break;
case MODE_SENSE_10:
size = (cdb[7] << 8) + cdb[8];
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
if (!passthrough)
cmd->execute_task = target_emulate_modesense;
break;
case GPCMD_READ_BUFFER_CAPACITY:
case GPCMD_SEND_OPC:
case LOG_SELECT:
@ -2840,11 +2814,14 @@ static int transport_generic_cmd_sequencer(
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
break;
case PERSISTENT_RESERVE_IN:
if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS)
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:
cmd->transport_emulate_cdb =
(su_dev->t10_pr.res_type ==
SPC3_PERSISTENT_RESERVATIONS) ?
core_scsi3_emulate_pr : NULL;
if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS)
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;
@ -2863,12 +2840,10 @@ 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) |
@ -2888,6 +2863,8 @@ static int transport_generic_cmd_sequencer(
if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
cmd->sam_task_attr = MSG_HEAD_TAG;
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
if (!passthrough)
cmd->execute_task = target_emulate_inquiry;
break;
case READ_BUFFER:
size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
@ -2896,6 +2873,8 @@ static int transport_generic_cmd_sequencer(
case READ_CAPACITY:
size = READ_CAP_LEN;
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
if (!passthrough)
cmd->execute_task = target_emulate_readcapacity;
break;
case READ_MEDIA_SERIAL_NUMBER:
case SECURITY_PROTOCOL_IN:
@ -2904,6 +2883,21 @@ static int transport_generic_cmd_sequencer(
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
break;
case SERVICE_ACTION_IN:
switch (cmd->t_task_cdb[1] & 0x1f) {
case SAI_READ_CAPACITY_16:
if (!passthrough)
cmd->execute_task =
target_emulate_readcapacity_16;
break;
default:
if (passthrough)
break;
pr_err("Unsupported SA: 0x%02x\n",
cmd->t_task_cdb[1] & 0x1f);
goto out_unsupported_cdb;
}
/*FALLTHROUGH*/
case ACCESS_CONTROL_IN:
case ACCESS_CONTROL_OUT:
case EXTENDED_COPY:
@ -2934,6 +2928,8 @@ static int transport_generic_cmd_sequencer(
case REQUEST_SENSE:
size = cdb[4];
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
if (!passthrough)
cmd->execute_task = target_emulate_request_sense;
break;
case READ_ELEMENT_STATUS:
size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9];
@ -2961,10 +2957,8 @@ static int transport_generic_cmd_sequencer(
* is running in SPC_PASSTHROUGH, and wants reservations
* emulation disabled.
*/
cmd->transport_emulate_cdb =
(su_dev->t10_pr.res_type !=
SPC_PASSTHROUGH) ?
core_scsi2_emulate_crh : NULL;
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:
@ -2978,10 +2972,8 @@ static int transport_generic_cmd_sequencer(
else
size = cmd->data_length;
cmd->transport_emulate_cdb =
(su_dev->t10_pr.res_type !=
SPC_PASSTHROUGH) ?
core_scsi2_emulate_crh : NULL;
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:
@ -3002,16 +2994,9 @@ 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)
if (passthrough)
break;
/*
* Set SCF_EMULATE_CDB_ASYNC to ensure asynchronous operation
* for SYNCHRONIZE_CACHE* Immed=1 case in __transport_execute_tasks()
*/
cmd->se_cmd_flags |= SCF_EMULATE_CDB_ASYNC;
/*
* Check to ensure that LBA + Range does not exceed past end of
* device for IBLOCK and FILEIO ->do_sync_cache() backend calls
@ -3020,10 +3005,13 @@ static int transport_generic_cmd_sequencer(
if (transport_cmd_get_valid_sectors(cmd) < 0)
goto out_invalid_cdb_field;
}
cmd->execute_task = target_emulate_synchronize_cache;
break;
case UNMAP:
size = get_unaligned_be16(&cdb[7]);
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
if (!passthrough)
cmd->execute_task = target_emulate_unmap;
break;
case WRITE_SAME_16:
sectors = transport_get_sectors_16(cdb, cmd, &sector_ret);
@ -3042,6 +3030,8 @@ static int transport_generic_cmd_sequencer(
if (target_check_write_same_discard(&cdb[1], dev) < 0)
goto out_invalid_cdb_field;
if (!passthrough)
cmd->execute_task = target_emulate_write_same;
break;
case WRITE_SAME:
sectors = transport_get_sectors_10(cdb, cmd, &sector_ret);
@ -3063,26 +3053,31 @@ static int transport_generic_cmd_sequencer(
*/
if (target_check_write_same_discard(&cdb[1], dev) < 0)
goto out_invalid_cdb_field;
if (!passthrough)
cmd->execute_task = target_emulate_write_same;
break;
case ALLOW_MEDIUM_REMOVAL:
case GPCMD_CLOSE_TRACK:
case ERASE:
case INITIALIZE_ELEMENT_STATUS:
case GPCMD_LOAD_UNLOAD:
case REZERO_UNIT:
case SEEK_10:
case GPCMD_SET_SPEED:
case SPACE:
case START_STOP:
case TEST_UNIT_READY:
case VERIFY:
case WRITE_FILEMARKS:
cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
if (!passthrough)
cmd->execute_task = target_emulate_noop;
break;
case GPCMD_CLOSE_TRACK:
case INITIALIZE_ELEMENT_STATUS:
case GPCMD_LOAD_UNLOAD:
case GPCMD_SET_SPEED:
case MOVE_MEDIUM:
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
@ -3134,6 +3129,11 @@ static int transport_generic_cmd_sequencer(
cmd->data_length = size;
}
/* reject any command that we don't have a handler for */
if (!(passthrough || cmd->execute_task ||
(cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)))
goto out_unsupported_cdb;
/* Let's limit control cdbs to a page, for simplicity's sake. */
if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) &&
size > PAGE_SIZE)
@ -3308,7 +3308,7 @@ static void target_complete_ok_work(struct work_struct *work)
if (cmd->scsi_status) {
ret = transport_send_check_condition_and_sense(
cmd, reason, 1);
if (ret == -EAGAIN)
if (ret == -EAGAIN || ret == -ENOMEM)
goto queue_full;
transport_lun_remove_cmd(cmd);
@ -3333,7 +3333,7 @@ static void target_complete_ok_work(struct work_struct *work)
spin_unlock(&cmd->se_lun->lun_sep_lock);
ret = cmd->se_tfo->queue_data_in(cmd);
if (ret == -EAGAIN)
if (ret == -EAGAIN || ret == -ENOMEM)
goto queue_full;
break;
case DMA_TO_DEVICE:
@ -3354,14 +3354,14 @@ static void target_complete_ok_work(struct work_struct *work)
}
spin_unlock(&cmd->se_lun->lun_sep_lock);
ret = cmd->se_tfo->queue_data_in(cmd);
if (ret == -EAGAIN)
if (ret == -EAGAIN || ret == -ENOMEM)
goto queue_full;
break;
}
/* Fall through for DMA_TO_DEVICE */
case DMA_NONE:
ret = cmd->se_tfo->queue_status(cmd);
if (ret == -EAGAIN)
if (ret == -EAGAIN || ret == -ENOMEM)
goto queue_full;
break;
default:
@ -3890,7 +3890,10 @@ EXPORT_SYMBOL(transport_generic_process_write);
static void transport_write_pending_qf(struct se_cmd *cmd)
{
if (cmd->se_tfo->write_pending(cmd) == -EAGAIN) {
int ret;
ret = cmd->se_tfo->write_pending(cmd);
if (ret == -EAGAIN || ret == -ENOMEM) {
pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n",
cmd);
transport_handle_queue_full(cmd, cmd->se_dev);
@ -3920,7 +3923,7 @@ static int transport_generic_write_pending(struct se_cmd *cmd)
* frontend know that WRITE buffers are ready.
*/
ret = cmd->se_tfo->write_pending(cmd);
if (ret == -EAGAIN)
if (ret == -EAGAIN || ret == -ENOMEM)
goto queue_full;
else if (ret < 0)
return ret;
@ -3931,7 +3934,7 @@ queue_full:
pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd);
cmd->t_state = TRANSPORT_COMPLETE_QF_WP;
transport_handle_queue_full(cmd, cmd->se_dev);
return ret;
return 0;
}
/**
@ -3949,6 +3952,14 @@ void transport_release_cmd(struct se_cmd *cmd)
core_tmr_release_req(cmd->se_tmr_req);
if (cmd->t_task_cdb != cmd->__t_task_cdb)
kfree(cmd->t_task_cdb);
/*
* Check if target_wait_for_sess_cmds() is expecting to
* release se_cmd directly here..
*/
if (cmd->check_release != 0 && cmd->se_tfo->check_release_cmd)
if (cmd->se_tfo->check_release_cmd(cmd) != 0)
return;
cmd->se_tfo->release_cmd(cmd);
}
EXPORT_SYMBOL(transport_release_cmd);
@ -3976,6 +3987,114 @@ void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks)
}
EXPORT_SYMBOL(transport_generic_free_cmd);
/* target_get_sess_cmd - Add command to active ->sess_cmd_list
* @se_sess: session to reference
* @se_cmd: command descriptor to add
*/
void target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd)
{
unsigned long flags;
spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list);
se_cmd->check_release = 1;
spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
}
EXPORT_SYMBOL(target_get_sess_cmd);
/* target_put_sess_cmd - Check for active I/O shutdown or list delete
* @se_sess: session to reference
* @se_cmd: command descriptor to drop
*/
int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd)
{
unsigned long flags;
spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
if (list_empty(&se_cmd->se_cmd_list)) {
spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
WARN_ON(1);
return 0;
}
if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) {
spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
complete(&se_cmd->cmd_wait_comp);
return 1;
}
list_del(&se_cmd->se_cmd_list);
spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
return 0;
}
EXPORT_SYMBOL(target_put_sess_cmd);
/* target_splice_sess_cmd_list - Split active cmds into sess_wait_list
* @se_sess: session to split
*/
void target_splice_sess_cmd_list(struct se_session *se_sess)
{
struct se_cmd *se_cmd;
unsigned long flags;
WARN_ON(!list_empty(&se_sess->sess_wait_list));
INIT_LIST_HEAD(&se_sess->sess_wait_list);
spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
se_sess->sess_tearing_down = 1;
list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list);
list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list)
se_cmd->cmd_wait_set = 1;
spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
}
EXPORT_SYMBOL(target_splice_sess_cmd_list);
/* target_wait_for_sess_cmds - Wait for outstanding descriptors
* @se_sess: session to wait for active I/O
* @wait_for_tasks: Make extra transport_wait_for_tasks call
*/
void target_wait_for_sess_cmds(
struct se_session *se_sess,
int wait_for_tasks)
{
struct se_cmd *se_cmd, *tmp_cmd;
bool rc = false;
list_for_each_entry_safe(se_cmd, tmp_cmd,
&se_sess->sess_wait_list, se_cmd_list) {
list_del(&se_cmd->se_cmd_list);
pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:"
" %d\n", se_cmd, se_cmd->t_state,
se_cmd->se_tfo->get_cmd_state(se_cmd));
if (wait_for_tasks) {
pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d,"
" fabric state: %d\n", se_cmd, se_cmd->t_state,
se_cmd->se_tfo->get_cmd_state(se_cmd));
rc = transport_wait_for_tasks(se_cmd);
pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d,"
" fabric state: %d\n", se_cmd, se_cmd->t_state,
se_cmd->se_tfo->get_cmd_state(se_cmd));
}
if (!rc) {
wait_for_completion(&se_cmd->cmd_wait_comp);
pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d"
" fabric state: %d\n", se_cmd, se_cmd->t_state,
se_cmd->se_tfo->get_cmd_state(se_cmd));
}
se_cmd->se_tfo->release_cmd(se_cmd);
}
}
EXPORT_SYMBOL(target_wait_for_sess_cmds);
/* transport_lun_wait_for_tasks():
*
* Called from ConfigFS context to stop the passed struct se_cmd to allow
@ -4152,14 +4271,14 @@ int transport_clear_lun_from_sessions(struct se_lun *lun)
* Called from frontend fabric context to wait for storage engine
* to pause and/or release frontend generated struct se_cmd.
*/
void transport_wait_for_tasks(struct se_cmd *cmd)
bool transport_wait_for_tasks(struct se_cmd *cmd)
{
unsigned long flags;
spin_lock_irqsave(&cmd->t_state_lock, flags);
if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) {
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
return;
return false;
}
/*
* Only perform a possible wait_for_tasks if SCF_SUPPORTED_SAM_OPCODE
@ -4167,7 +4286,7 @@ void transport_wait_for_tasks(struct se_cmd *cmd)
*/
if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && !cmd->se_tmr_req) {
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
return;
return false;
}
/*
* If we are already stopped due to an external event (ie: LUN shutdown)
@ -4210,7 +4329,7 @@ void transport_wait_for_tasks(struct se_cmd *cmd)
if (!atomic_read(&cmd->t_transport_active) ||
atomic_read(&cmd->t_transport_aborted)) {
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
return;
return false;
}
atomic_set(&cmd->t_transport_stop, 1);
@ -4235,6 +4354,8 @@ void transport_wait_for_tasks(struct se_cmd *cmd)
cmd->se_tfo->get_task_tag(cmd));
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
return true;
}
EXPORT_SYMBOL(transport_wait_for_tasks);
@ -4583,9 +4704,7 @@ get_cmd:
break;
}
ret = transport_generic_new_cmd(cmd);
if (ret == -EAGAIN)
break;
else if (ret < 0) {
if (ret < 0) {
cmd->transport_error_status = ret;
transport_generic_request_failure(cmd,
0, (cmd->data_direction !=
@ -4595,9 +4714,6 @@ get_cmd:
case TRANSPORT_PROCESS_WRITE:
transport_generic_process_write(cmd);
break;
case TRANSPORT_FREE_CMD_INTR:
transport_generic_free_cmd(cmd, 0);
break;
case TRANSPORT_PROCESS_TMR:
transport_generic_do_tmr(cmd);
break;

2
drivers/target/tcm_fc/tcm_fc.h
View File

@ -156,7 +156,7 @@ int ft_lport_notify(struct notifier_block *, unsigned long, void *);
/*
* IO methods.
*/
void ft_check_stop_free(struct se_cmd *);
int ft_check_stop_free(struct se_cmd *);
void ft_release_cmd(struct se_cmd *);
int ft_queue_status(struct se_cmd *);
int ft_queue_data_in(struct se_cmd *);

3
drivers/target/tcm_fc/tfc_cmd.c
View File

@ -112,9 +112,10 @@ void ft_release_cmd(struct se_cmd *se_cmd)
ft_free_cmd(cmd);
}
void ft_check_stop_free(struct se_cmd *se_cmd)
int ft_check_stop_free(struct se_cmd *se_cmd)
{
transport_generic_free_cmd(se_cmd, 0);
return 1;
}
/*

13
include/target/target_core_base.h
View File

@ -89,7 +89,6 @@ enum transport_state_table {
TRANSPORT_PROCESS_TMR = 9,
TRANSPORT_ISTATE_PROCESSING = 11,
TRANSPORT_NEW_CMD_MAP = 16,
TRANSPORT_FREE_CMD_INTR = 17,
TRANSPORT_COMPLETE_QF_WP = 18,
TRANSPORT_COMPLETE_QF_OK = 19,
};
@ -115,7 +114,6 @@ enum se_cmd_flags_table {
SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000,
SCF_UNUSED = 0x00100000,
SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
SCF_EMULATE_CDB_ASYNC = 0x01000000,
};
/* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
@ -426,6 +424,9 @@ struct se_cmd {
enum transport_state_table t_state;
/* Transport specific error status */
int transport_error_status;
/* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */
int check_release:1;
int cmd_wait_set:1;
/* See se_cmd_flags_table */
u32 se_cmd_flags;
u32 se_ordered_id;
@ -452,8 +453,10 @@ struct se_cmd {
struct se_session *se_sess;
struct se_tmr_req *se_tmr_req;
struct list_head se_queue_node;
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;
@ -559,12 +562,16 @@ struct se_node_acl {
} ____cacheline_aligned;
struct se_session {
int sess_tearing_down:1;
u64 sess_bin_isid;
struct se_node_acl *se_node_acl;
struct se_portal_group *se_tpg;
void *fabric_sess_ptr;
struct list_head sess_list;
struct list_head sess_acl_list;
struct list_head sess_cmd_list;
struct list_head sess_wait_list;
spinlock_t sess_cmd_lock;
} ____cacheline_aligned;
struct se_device;

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 *);

11
include/target/target_core_fabric_ops.h
View File

@ -46,9 +46,16 @@ struct target_core_fabric_ops {
int (*new_cmd_map)(struct se_cmd *);
/*
* Optional to release struct se_cmd and fabric dependent allocated
* I/O descriptor in transport_cmd_check_stop()
* I/O descriptor in transport_cmd_check_stop().
*
* Returning 1 will signal a descriptor has been released.
* Returning 0 will signal a descriptor has not been released.
*/
void (*check_stop_free)(struct se_cmd *);
int (*check_stop_free)(struct se_cmd *);
/*
* Optional check for active I/O shutdown
*/
int (*check_release_cmd)(struct se_cmd *);
void (*release_cmd)(struct se_cmd *);
/*
* Called with spin_lock_bh(struct se_portal_group->session_lock held.

7
include/target/target_core_transport.h
View File

@ -160,17 +160,20 @@ extern int transport_generic_handle_cdb_map(struct se_cmd *);
extern int transport_generic_handle_data(struct se_cmd *);
extern void transport_new_cmd_failure(struct se_cmd *);
extern int transport_generic_handle_tmr(struct se_cmd *);
extern void transport_generic_free_cmd_intr(struct se_cmd *);
extern bool target_stop_task(struct se_task *task, unsigned long *flags);
extern int transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *, u32,
struct scatterlist *, u32);
extern int transport_clear_lun_from_sessions(struct se_lun *);
extern void transport_wait_for_tasks(struct se_cmd *);
extern bool transport_wait_for_tasks(struct se_cmd *);
extern int transport_check_aborted_status(struct se_cmd *, int);
extern int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
extern void transport_send_task_abort(struct se_cmd *);
extern void transport_release_cmd(struct se_cmd *);
extern void transport_generic_free_cmd(struct se_cmd *, int);
extern void target_get_sess_cmd(struct se_session *, struct se_cmd *);
extern int target_put_sess_cmd(struct se_session *, struct se_cmd *);
extern void target_splice_sess_cmd_list(struct se_session *);
extern void target_wait_for_sess_cmds(struct se_session *, int);
extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
extern void transport_do_task_sg_chain(struct se_cmd *);
extern void transport_generic_process_write(struct se_cmd *);