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target: Updates from AGrover and HCH (round 3) 

This patch contains a squashed version of third round series cleanups,
improvements ,and simplfications from Andy and Christoph ahead of the
heavy lifting between round 3 -> 4 for the target core SGL conversion.

This include cleanups to the main target I/O path and other miscellaneous
updates.

target: Replace custom sg<->buf functions with lib funcs
target: Simplify sector limiting code
target: get_cdb should never return NULL
target: Simplify transport_memcpy_se_mem_read_contig
target: Use assignment rather than increment for t_task_cdbs
target: Don't pass dma_size to generic_get_mem
target: Pass sg with type scatterlist in transport_map_sg_to_mem
target: Move task_sg_num next to task_sg in struct se_task
target: inline struct se_transport_task into struct se_cmd
target: Change name & semantics of transport_get_sectors()
target: Remove unused members of se_cmd
target: Rename se_cmd.t_task_cdbs to t_task_list_num
target: Fix some spelling
target: Remove unused var from transport_generic_do_tmr
target: map_sg_to_mem: return sg_count in return value
target/pscsi: Use min_t for sector limits
target/pscsi: Unused param for pscsi_get_bio()
target: Rename get_cdb_count to allocate_tasks
target: Make transport_generic_new_cmd() available for iscsi-target
target: Remove fabric callback to allocate iovecs
target: Fix transport_generic_new_cmd WRITE comment

(hch: Use __GFP_ZERO usage for alloc_pages() usage)

Signed-off-by: Andy Grover <agrover@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
hifive-unleashed-5.1
Andy Grover 2011-05-02 17:12:10 -07:00 committed by Nicholas Bellinger
parent dd3a5ad8e0
commit a1d8b49abd
17 changed files with 583 additions and 753 deletions
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11
drivers/target/loopback/tcm_loop.c
View File

@ -118,7 +118,7 @@ static struct se_cmd *tcm_loop_allocate_core_cmd(
* Signal BIDI usage with T_TASK(cmd)->t_tasks_bidi
*/
if (scsi_bidi_cmnd(sc))
se_cmd->t_task.t_tasks_bidi = 1;
se_cmd->t_tasks_bidi = 1;
/*
* Locate the struct se_lun pointer and attach it to struct se_cmd
*/
@ -169,7 +169,7 @@ static int tcm_loop_new_cmd_map(struct se_cmd *se_cmd)
* For BIDI commands, pass in the extra READ buffer
* to transport_generic_map_mem_to_cmd() below..
*/
if (se_cmd->t_task.t_tasks_bidi) {
if (se_cmd->t_tasks_bidi) {
struct scsi_data_buffer *sdb = scsi_in(sc);
sgl_bidi = sdb->table.sgl;
@ -1423,13 +1423,6 @@ static int tcm_loop_register_configfs(void)
fabric->tf_ops.tpg_release_fabric_acl =
&tcm_loop_tpg_release_fabric_acl;
fabric->tf_ops.tpg_get_inst_index = &tcm_loop_get_inst_index;
/*
* Since tcm_loop is mapping physical memory from Linux/SCSI
* struct scatterlist arrays for each struct scsi_cmnd I/O,
* we do not need TCM to allocate a iovec array for
* virtual memory address mappings
*/
fabric->tf_ops.alloc_cmd_iovecs = NULL;
/*
* Used for setting up remaining TCM resources in process context
*/

4
drivers/target/target_core_alua.c
View File

@ -65,7 +65,7 @@ int core_emulate_report_target_port_groups(struct se_cmd *cmd)
struct se_port *port;
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
unsigned char *buf = (unsigned char *)cmd->t_task.t_task_buf;
unsigned char *buf = (unsigned char *)cmd->t_task_buf;
u32 rd_len = 0, off = 4; /* Skip over RESERVED area to first
Target port group descriptor */
@ -157,7 +157,7 @@ int core_emulate_set_target_port_groups(struct se_cmd *cmd)
struct se_node_acl *nacl = cmd->se_sess->se_node_acl;
struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *l_tg_pt_gp_mem;
unsigned char *buf = (unsigned char *)cmd->t_task.t_task_buf;
unsigned char *buf = (unsigned char *)cmd->t_task_buf;
unsigned char *ptr = &buf[4]; /* Skip over RESERVED area in header */
u32 len = 4; /* Skip over RESERVED area in header */
int alua_access_state, primary = 0, rc;

39
drivers/target/target_core_cdb.c
View File

@ -66,7 +66,7 @@ target_emulate_inquiry_std(struct se_cmd *cmd)
{
struct se_lun *lun = cmd->se_lun;
struct se_device *dev = cmd->se_dev;
unsigned char *buf = cmd->t_task.t_task_buf;
unsigned char *buf = cmd->t_task_buf;
/*
* Make sure we at least have 6 bytes of INQUIRY response
@ -621,8 +621,8 @@ static int
target_emulate_inquiry(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
unsigned char *buf = cmd->t_task.t_task_buf;
unsigned char *cdb = cmd->t_task.t_task_cdb;
unsigned char *buf = cmd->t_task_buf;
unsigned char *cdb = cmd->t_task_cdb;
if (!(cdb[1] & 0x1))
return target_emulate_inquiry_std(cmd);
@ -666,7 +666,7 @@ static int
target_emulate_readcapacity(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
unsigned char *buf = cmd->t_task.t_task_buf;
unsigned char *buf = cmd->t_task_buf;
unsigned long long blocks_long = dev->transport->get_blocks(dev);
u32 blocks;
@ -696,7 +696,7 @@ static int
target_emulate_readcapacity_16(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
unsigned char *buf = cmd->t_task.t_task_buf;
unsigned char *buf = cmd->t_task_buf;
unsigned long long blocks = dev->transport->get_blocks(dev);
buf[0] = (blocks >> 56) & 0xff;
@ -831,8 +831,8 @@ static int
target_emulate_modesense(struct se_cmd *cmd, int ten)
{
struct se_device *dev = cmd->se_dev;
char *cdb = cmd->t_task.t_task_cdb;
unsigned char *rbuf = cmd->t_task.t_task_buf;
char *cdb = cmd->t_task_cdb;
unsigned char *rbuf = cmd->t_task_buf;
int type = dev->transport->get_device_type(dev);
int offset = (ten) ? 8 : 4;
int length = 0;
@ -903,8 +903,8 @@ target_emulate_modesense(struct se_cmd *cmd, int ten)
static int
target_emulate_request_sense(struct se_cmd *cmd)
{
unsigned char *cdb = cmd->t_task.t_task_cdb;
unsigned char *buf = cmd->t_task.t_task_buf;
unsigned char *cdb = cmd->t_task_cdb;
unsigned char *buf = cmd->t_task_buf;
u8 ua_asc = 0, ua_ascq = 0;
if (cdb[1] & 0x01) {
@ -965,8 +965,8 @@ target_emulate_unmap(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
unsigned char *buf = cmd->t_task.t_task_buf, *ptr = NULL;
unsigned char *cdb = &cmd->t_task.t_task_cdb[0];
unsigned char *buf = cmd->t_task_buf, *ptr = NULL;
unsigned char *cdb = &cmd->t_task_cdb[0];
sector_t lba;
unsigned int size = cmd->data_length, range;
int ret, offset;
@ -1012,7 +1012,8 @@ target_emulate_write_same(struct se_task *task, int write_same32)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
sector_t range, lba = cmd->t_task.t_task_lba;
sector_t range;
sector_t lba = cmd->t_task_lba;
unsigned int num_blocks;
int ret;
/*
@ -1021,9 +1022,9 @@ target_emulate_write_same(struct se_task *task, int write_same32)
* range based on ->get_blocks() - starting LBA.
*/
if (write_same32)
num_blocks = get_unaligned_be32(&cmd->t_task.t_task_cdb[28]);
num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]);
else
num_blocks = get_unaligned_be32(&cmd->t_task.t_task_cdb[10]);
num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]);
if (num_blocks != 0)
range = num_blocks;
@ -1052,7 +1053,7 @@ transport_emulate_control_cdb(struct se_task *task)
unsigned short service_action;
int ret = 0;
switch (cmd->t_task.t_task_cdb[0]) {
switch (cmd->t_task_cdb[0]) {
case INQUIRY:
ret = target_emulate_inquiry(cmd);
break;
@ -1066,13 +1067,13 @@ transport_emulate_control_cdb(struct se_task *task)
ret = target_emulate_modesense(cmd, 1);
break;
case SERVICE_ACTION_IN:
switch (cmd->t_task.t_task_cdb[1] & 0x1f) {
switch (cmd->t_task_cdb[1] & 0x1f) {
case SAI_READ_CAPACITY_16:
ret = target_emulate_readcapacity_16(cmd);
break;
default:
printk(KERN_ERR "Unsupported SA: 0x%02x\n",
cmd->t_task.t_task_cdb[1] & 0x1f);
cmd->t_task_cdb[1] & 0x1f);
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
}
break;
@ -1097,7 +1098,7 @@ transport_emulate_control_cdb(struct se_task *task)
break;
case VARIABLE_LENGTH_CMD:
service_action =
get_unaligned_be16(&cmd->t_task.t_task_cdb[8]);
get_unaligned_be16(&cmd->t_task_cdb[8]);
switch (service_action) {
case WRITE_SAME_32:
if (!dev->transport->do_discard) {
@ -1136,7 +1137,7 @@ transport_emulate_control_cdb(struct se_task *task)
break;
default:
printk(KERN_ERR "Unsupported SCSI Opcode: 0x%02x for %s\n",
cmd->t_task.t_task_cdb[0], dev->transport->name);
cmd->t_task_cdb[0], dev->transport->name);
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
}

6
drivers/target/target_core_device.c
View File

@ -168,7 +168,7 @@ int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
*/
spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
atomic_set(&se_cmd->t_task.transport_lun_active, 1);
atomic_set(&se_cmd->transport_lun_active, 1);
spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
return 0;
@ -656,10 +656,10 @@ int transport_core_report_lun_response(struct se_cmd *se_cmd)
struct se_lun *se_lun;
struct se_session *se_sess = se_cmd->se_sess;
struct se_task *se_task;
unsigned char *buf = se_cmd->t_task.t_task_buf;
unsigned char *buf = se_cmd->t_task_buf;
u32 cdb_offset = 0, lun_count = 0, offset = 8, i;
list_for_each_entry(se_task, &se_cmd->t_task.t_task_list, t_list)
list_for_each_entry(se_task, &se_cmd->t_task_list, t_list)
break;
if (!(se_task)) {

8
drivers/target/target_core_file.c
View File

@ -377,7 +377,7 @@ static void fd_emulate_sync_cache(struct se_task *task)
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
struct fd_dev *fd_dev = dev->dev_ptr;
int immed = (cmd->t_task.t_task_cdb[1] & 0x2);
int immed = (cmd->t_task_cdb[1] & 0x2);
loff_t start, end;
int ret;
@ -391,11 +391,11 @@ static void fd_emulate_sync_cache(struct se_task *task)
/*
* Determine if we will be flushing the entire device.
*/
if (cmd->t_task.t_task_lba == 0 && cmd->data_length == 0) {
if (cmd->t_task_lba == 0 && cmd->data_length == 0) {
start = 0;
end = LLONG_MAX;
} else {
start = cmd->t_task.t_task_lba * dev->se_sub_dev->se_dev_attrib.block_size;
start = cmd->t_task_lba * dev->se_sub_dev->se_dev_attrib.block_size;
if (cmd->data_length)
end = start + cmd->data_length;
else
@ -475,7 +475,7 @@ static int fd_do_task(struct se_task *task)
if (ret > 0 &&
dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0 &&
dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 &&
cmd->t_task.t_tasks_fua) {
cmd->t_tasks_fua) {
/*
* We might need to be a bit smarter here
* and return some sense data to let the initiator

4
drivers/target/target_core_iblock.c
View File

@ -331,7 +331,7 @@ static void iblock_emulate_sync_cache(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr;
int immed = (cmd->t_task.t_task_cdb[1] & 0x2);
int immed = (cmd->t_task_cdb[1] & 0x2);
sector_t error_sector;
int ret;
@ -400,7 +400,7 @@ static int iblock_do_task(struct se_task *task)
*/
if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache == 0 ||
(dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 &&
task->task_se_cmd->t_task.t_tasks_fua))
task->task_se_cmd->t_tasks_fua))
rw = WRITE_FUA;
else
rw = WRITE;

22
drivers/target/target_core_pr.c
View File

@ -157,8 +157,8 @@ static int core_scsi2_reservation_reserve(struct se_cmd *cmd)
struct se_session *sess = cmd->se_sess;
struct se_portal_group *tpg = sess->se_tpg;
if ((cmd->t_task.t_task_cdb[1] & 0x01) &&
(cmd->t_task.t_task_cdb[1] & 0x02)) {
if ((cmd->t_task_cdb[1] & 0x01) &&
(cmd->t_task_cdb[1] & 0x02)) {
printk(KERN_ERR "LongIO and Obselete Bits set, returning"
" ILLEGAL_REQUEST\n");
return PYX_TRANSPORT_ILLEGAL_REQUEST;
@ -216,7 +216,7 @@ int core_scsi2_emulate_crh(struct se_cmd *cmd)
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.t_task_cdb[0];
unsigned char *cdb = &cmd->t_task_cdb[0];
int crh = (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS);
int conflict = 0;
@ -1482,7 +1482,7 @@ static int core_scsi3_decode_spec_i_port(
struct list_head tid_dest_list;
struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp;
struct target_core_fabric_ops *tmp_tf_ops;
unsigned char *buf = (unsigned char *)cmd->t_task.t_task_buf;
unsigned char *buf = (unsigned char *)cmd->t_task_buf;
unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident;
char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
u32 tpdl, tid_len = 0;
@ -3307,7 +3307,7 @@ static int core_scsi3_emulate_pro_register_and_move(
struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops;
struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg;
struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
unsigned char *buf = (unsigned char *)cmd->t_task.t_task_buf;
unsigned char *buf = (unsigned char *)cmd->t_task_buf;
unsigned char *initiator_str;
char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
u32 tid_len, tmp_tid_len;
@ -3723,7 +3723,7 @@ static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb)
*/
static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb)
{
unsigned char *buf = (unsigned char *)cmd->t_task.t_task_buf;
unsigned char *buf = (unsigned char *)cmd->t_task_buf;
u64 res_key, sa_res_key;
int sa, scope, type, aptpl;
int spec_i_pt = 0, all_tg_pt = 0, unreg = 0;
@ -3830,7 +3830,7 @@ static int core_scsi3_pri_read_keys(struct se_cmd *cmd)
struct se_device *se_dev = cmd->se_dev;
struct se_subsystem_dev *su_dev = se_dev->se_sub_dev;
struct t10_pr_registration *pr_reg;
unsigned char *buf = (unsigned char *)cmd->t_task.t_task_buf;
unsigned char *buf = (unsigned char *)cmd->t_task_buf;
u32 add_len = 0, off = 8;
if (cmd->data_length < 8) {
@ -3885,7 +3885,7 @@ static int core_scsi3_pri_read_reservation(struct se_cmd *cmd)
struct se_device *se_dev = cmd->se_dev;
struct se_subsystem_dev *su_dev = se_dev->se_sub_dev;
struct t10_pr_registration *pr_reg;
unsigned char *buf = (unsigned char *)cmd->t_task.t_task_buf;
unsigned char *buf = (unsigned char *)cmd->t_task_buf;
u64 pr_res_key;
u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */
@ -3965,7 +3965,7 @@ static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
unsigned char *buf = (unsigned char *)cmd->t_task.t_task_buf;
unsigned char *buf = (unsigned char *)cmd->t_task_buf;
u16 add_len = 8; /* Hardcoded to 8. */
if (cmd->data_length < 6) {
@ -4020,7 +4020,7 @@ static int core_scsi3_pri_read_full_status(struct se_cmd *cmd)
struct se_portal_group *se_tpg;
struct t10_pr_registration *pr_reg, *pr_reg_tmp;
struct t10_reservation *pr_tmpl = &se_dev->se_sub_dev->t10_pr;
unsigned char *buf = (unsigned char *)cmd->t_task.t_task_buf;
unsigned char *buf = (unsigned char *)cmd->t_task_buf;
u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len;
u32 off = 8; /* off into first Full Status descriptor */
int format_code = 0;
@ -4174,7 +4174,7 @@ static int core_scsi3_emulate_pr_in(struct se_cmd *cmd, unsigned char *cdb)
int core_scsi3_emulate_pr(struct se_cmd *cmd)
{
unsigned char *cdb = &cmd->t_task.t_task_cdb[0];
unsigned char *cdb = &cmd->t_task_cdb[0];
struct se_device *dev = cmd->se_dev;
/*
* Following spc2r20 5.5.1 Reservations overview:

20
drivers/target/target_core_pscsi.c
View File

@ -328,10 +328,8 @@ static struct se_device *pscsi_add_device_to_list(
q = sd->request_queue;
limits = &dev_limits.limits;
limits->logical_block_size = sd->sector_size;
limits->max_hw_sectors = (sd->host->max_sectors > queue_max_hw_sectors(q)) ?
queue_max_hw_sectors(q) : sd->host->max_sectors;
limits->max_sectors = (sd->host->max_sectors > queue_max_sectors(q)) ?
queue_max_sectors(q) : sd->host->max_sectors;
limits->max_hw_sectors = min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q));
limits->max_sectors = min_t(int, sd->host->max_sectors, queue_max_sectors(q));
dev_limits.hw_queue_depth = sd->queue_depth;
dev_limits.queue_depth = sd->queue_depth;
/*
@ -697,7 +695,7 @@ static int pscsi_transport_complete(struct se_task *task)
if (task->task_se_cmd->se_deve->lun_flags &
TRANSPORT_LUNFLAGS_READ_ONLY) {
unsigned char *buf = task->task_se_cmd->t_task.t_task_buf;
unsigned char *buf = task->task_se_cmd->t_task_buf;
if (cdb[0] == MODE_SENSE_10) {
if (!(buf[3] & 0x80))
@ -763,7 +761,7 @@ static struct se_task *
pscsi_alloc_task(struct se_cmd *cmd)
{
struct pscsi_plugin_task *pt;
unsigned char *cdb = cmd->t_task.t_task_cdb;
unsigned char *cdb = cmd->t_task_cdb;
pt = kzalloc(sizeof(struct pscsi_plugin_task), GFP_KERNEL);
if (!pt) {
@ -776,7 +774,7 @@ pscsi_alloc_task(struct se_cmd *cmd)
* allocate the extended CDB buffer for per struct se_task context
* pt->pscsi_cdb now.
*/
if (cmd->t_task.t_task_cdb != cmd->t_task.__t_task_cdb) {
if (cmd->t_task_cdb != cmd->__t_task_cdb) {
pt->pscsi_cdb = kzalloc(scsi_command_size(cdb), GFP_KERNEL);
if (!(pt->pscsi_cdb)) {
@ -889,7 +887,7 @@ static void pscsi_free_task(struct se_task *task)
* Release the extended CDB allocation from pscsi_alloc_task()
* if one exists.
*/
if (cmd->t_task.t_task_cdb != cmd->t_task.__t_task_cdb)
if (cmd->t_task_cdb != cmd->__t_task_cdb)
kfree(pt->pscsi_cdb);
/*
* We do not release the bio(s) here associated with this task, as
@ -1053,7 +1051,7 @@ static void pscsi_bi_endio(struct bio *bio, int error)
bio_put(bio);
}
static inline struct bio *pscsi_get_bio(struct pscsi_dev_virt *pdv, int sg_num)
static inline struct bio *pscsi_get_bio(int sg_num)
{
struct bio *bio;
/*
@ -1126,7 +1124,7 @@ static int __pscsi_map_task_SG(
/*
* Calls bio_kmalloc() and sets bio->bi_end_io()
*/
bio = pscsi_get_bio(pdv, nr_vecs);
bio = pscsi_get_bio(nr_vecs);
if (!(bio))
goto fail;
@ -1266,7 +1264,7 @@ static int pscsi_map_task_non_SG(struct se_task *task)
return 0;
ret = blk_rq_map_kern(pdv->pdv_sd->request_queue,
pt->pscsi_req, cmd->t_task.t_task_buf,
pt->pscsi_req, cmd->t_task_buf,
task->task_size, GFP_KERNEL);
if (ret < 0) {
printk(KERN_ERR "PSCSI: blk_rq_map_kern() failed: %d\n", ret);

8
drivers/target/target_core_rd.c
View File

@ -737,7 +737,7 @@ check_eot:
}
out:
task->task_se_cmd->t_task.t_tasks_se_num += *se_mem_cnt;
task->task_se_cmd->t_tasks_se_num += *se_mem_cnt;
#ifdef DEBUG_RAMDISK_DR
printk(KERN_INFO "RD_DR - Allocated %u struct se_mem segments for task\n",
*se_mem_cnt);
@ -819,7 +819,7 @@ static int rd_DIRECT_without_offset(
}
out:
task->task_se_cmd->t_task.t_tasks_se_num += *se_mem_cnt;
task->task_se_cmd->t_tasks_se_num += *se_mem_cnt;
#ifdef DEBUG_RAMDISK_DR
printk(KERN_INFO "RD_DR - Allocated %u struct se_mem segments for task\n",
*se_mem_cnt);
@ -880,14 +880,14 @@ static int rd_DIRECT_do_se_mem_map(
* across multiple struct se_task->task_sg[].
*/
ret = transport_init_task_sg(task,
list_first_entry(&cmd->t_task.t_mem_list,
list_first_entry(&cmd->t_mem_list,
struct se_mem, se_list),
task_offset);
if (ret <= 0)
return ret;
return transport_map_mem_to_sg(task, se_mem_list, task->task_sg,
list_first_entry(&cmd->t_task.t_mem_list,
list_first_entry(&cmd->t_mem_list,
struct se_mem, se_list),
out_se_mem, se_mem_cnt, task_offset_in);
}

56
drivers/target/target_core_tmr.c
View File

@ -178,14 +178,14 @@ int core_tmr_lun_reset(
continue;
spin_unlock(&dev->se_tmr_lock);
spin_lock_irqsave(&cmd->t_task.t_state_lock, flags);
if (!(atomic_read(&cmd->t_task.t_transport_active))) {
spin_unlock_irqrestore(&cmd->t_task.t_state_lock, flags);
spin_lock_irqsave(&cmd->t_state_lock, flags);
if (!(atomic_read(&cmd->t_transport_active))) {
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
spin_lock(&dev->se_tmr_lock);
continue;
}
if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) {
spin_unlock_irqrestore(&cmd->t_task.t_state_lock, flags);
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
spin_lock(&dev->se_tmr_lock);
continue;
}
@ -193,7 +193,7 @@ int core_tmr_lun_reset(
" Response: 0x%02x, t_state: %d\n",
(preempt_and_abort_list) ? "Preempt" : "", tmr_p,
tmr_p->function, tmr_p->response, cmd->t_state);
spin_unlock_irqrestore(&cmd->t_task.t_state_lock, flags);
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
transport_cmd_finish_abort_tmr(cmd);
spin_lock(&dev->se_tmr_lock);
@ -247,38 +247,38 @@ int core_tmr_lun_reset(
atomic_set(&task->task_state_active, 0);
spin_unlock_irqrestore(&dev->execute_task_lock, flags);
spin_lock_irqsave(&cmd->t_task.t_state_lock, flags);
spin_lock_irqsave(&cmd->t_state_lock, flags);
DEBUG_LR("LUN_RESET: %s cmd: %p task: %p"
" ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state/"
"def_t_state: %d/%d cdb: 0x%02x\n",
(preempt_and_abort_list) ? "Preempt" : "", cmd, task,
cmd->se_tfo->get_task_tag(cmd), 0,
cmd->se_tfo->get_cmd_state(cmd), cmd->t_state,
cmd->deferred_t_state, cmd->t_task.t_task_cdb[0]);
cmd->deferred_t_state, cmd->t_task_cdb[0]);
DEBUG_LR("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx"
" t_task_cdbs: %d t_task_cdbs_left: %d"
" t_task_cdbs_sent: %d -- t_transport_active: %d"
" t_transport_stop: %d t_transport_sent: %d\n",
cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key,
cmd->t_task.t_task_cdbs,
atomic_read(&cmd->t_task.t_task_cdbs_left),
atomic_read(&cmd->t_task.t_task_cdbs_sent),
atomic_read(&cmd->t_task.t_transport_active),
atomic_read(&cmd->t_task.t_transport_stop),
atomic_read(&cmd->t_task.t_transport_sent));
cmd->t_task_list_num,
atomic_read(&cmd->t_task_cdbs_left),
atomic_read(&cmd->t_task_cdbs_sent),
atomic_read(&cmd->t_transport_active),
atomic_read(&cmd->t_transport_stop),
atomic_read(&cmd->t_transport_sent));
if (atomic_read(&task->task_active)) {
atomic_set(&task->task_stop, 1);
spin_unlock_irqrestore(
&cmd->t_task.t_state_lock, flags);
&cmd->t_state_lock, flags);
DEBUG_LR("LUN_RESET: Waiting for task: %p to shutdown"
" for dev: %p\n", task, dev);
wait_for_completion(&task->task_stop_comp);
DEBUG_LR("LUN_RESET Completed task: %p shutdown for"
" dev: %p\n", task, dev);
spin_lock_irqsave(&cmd->t_task.t_state_lock, flags);
atomic_dec(&cmd->t_task.t_task_cdbs_left);
spin_lock_irqsave(&cmd->t_state_lock, flags);
atomic_dec(&cmd->t_task_cdbs_left);
atomic_set(&task->task_active, 0);
atomic_set(&task->task_stop, 0);
@ -288,24 +288,24 @@ int core_tmr_lun_reset(
}
__transport_stop_task_timer(task, &flags);
if (!(atomic_dec_and_test(&cmd->t_task.t_task_cdbs_ex_left))) {
if (!(atomic_dec_and_test(&cmd->t_task_cdbs_ex_left))) {
spin_unlock_irqrestore(
&cmd->t_task.t_state_lock, flags);
&cmd->t_state_lock, flags);
DEBUG_LR("LUN_RESET: Skipping task: %p, dev: %p for"
" t_task_cdbs_ex_left: %d\n", task, dev,
atomic_read(&cmd->t_task.t_task_cdbs_ex_left));
atomic_read(&cmd->t_task_cdbs_ex_left));
spin_lock_irqsave(&dev->execute_task_lock, flags);
continue;
}
fe_count = atomic_read(&cmd->t_task.t_fe_count);
fe_count = atomic_read(&cmd->t_fe_count);
if (atomic_read(&cmd->t_task.t_transport_active)) {
if (atomic_read(&cmd->t_transport_active)) {
DEBUG_LR("LUN_RESET: got t_transport_active = 1 for"
" task: %p, t_fe_count: %d dev: %p\n", task,
fe_count, dev);
atomic_set(&cmd->t_task.t_transport_aborted, 1);
spin_unlock_irqrestore(&cmd->t_task.t_state_lock,
atomic_set(&cmd->t_transport_aborted, 1);
spin_unlock_irqrestore(&cmd->t_state_lock,
flags);
core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
@ -314,8 +314,8 @@ int core_tmr_lun_reset(
}
DEBUG_LR("LUN_RESET: Got t_transport_active = 0 for task: %p,"
" t_fe_count: %d dev: %p\n", task, fe_count, dev);
atomic_set(&cmd->t_task.t_transport_aborted, 1);
spin_unlock_irqrestore(&cmd->t_task.t_state_lock, flags);
atomic_set(&cmd->t_transport_aborted, 1);
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
spin_lock_irqsave(&dev->execute_task_lock, flags);
@ -345,7 +345,7 @@ int core_tmr_lun_reset(
if (prout_cmd == cmd)
continue;
atomic_dec(&cmd->t_task.t_transport_queue_active);
atomic_dec(&cmd->t_transport_queue_active);
atomic_dec(&qobj->queue_cnt);
list_del(&cmd->se_queue_node);
spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
@ -353,7 +353,7 @@ int core_tmr_lun_reset(
DEBUG_LR("LUN_RESET: %s from Device Queue: cmd: %p t_state:"
" %d t_fe_count: %d\n", (preempt_and_abort_list) ?
"Preempt" : "", cmd, cmd->t_state,
atomic_read(&cmd->t_task.t_fe_count));
atomic_read(&cmd->t_fe_count));
/*
* Signal that the command has failed via cmd->se_cmd_flags,
* and call TFO->new_cmd_failure() to wakeup any fabric
@ -365,7 +365,7 @@ int core_tmr_lun_reset(
transport_new_cmd_failure(cmd);
core_tmr_handle_tas_abort(tmr_nacl, cmd, tas,
atomic_read(&cmd->t_task.t_fe_count));
atomic_read(&cmd->t_fe_count));
spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
}
spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);

1008
drivers/target/target_core_transport.c
View File

File diff suppressed because it is too large Load Diff

2
drivers/target/target_core_ua.c
View File

@ -270,7 +270,7 @@ void core_scsi3_ua_for_check_condition(
nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
(dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl != 0) ? "Reporting" :
"Releasing", dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl,
cmd->orig_fe_lun, cmd->t_task.t_task_cdb[0], *asc, *ascq);
cmd->orig_fe_lun, cmd->t_task_cdb[0], *asc, *ascq);
}
int core_scsi3_ua_clear_for_request_sense(

14
drivers/target/tcm_fc/tfc_cmd.c
View File

@ -60,7 +60,6 @@ void ft_dump_cmd(struct ft_cmd *cmd, const char *caller)
struct fc_seq *sp;
struct se_cmd *se_cmd;
struct se_mem *mem;
struct se_transport_task *task;
if (!(ft_debug_logging & FT_DEBUG_IO))
return;
@ -72,12 +71,11 @@ void ft_dump_cmd(struct ft_cmd *cmd, const char *caller)
caller, cmd, cmd->cdb);
printk(KERN_INFO "%s: cmd %p lun %d\n", caller, cmd, cmd->lun);
task = &se_cmd->t_task;
printk(KERN_INFO "%s: cmd %p task %p se_num %u buf %p len %u se_cmd_flags <0x%x>\n",
caller, cmd, task, task->t_tasks_se_num,
task->t_task_buf, se_cmd->data_length, se_cmd->se_cmd_flags);
printk(KERN_INFO "%s: cmd %p se_num %u buf %p len %u se_cmd_flags <0x%x>\n",
caller, cmd, se_cmd->t_tasks_se_num,
se_cmd->t_task_buf, se_cmd->data_length, se_cmd->se_cmd_flags);
list_for_each_entry(mem, &task->t_mem_list, se_list)
list_for_each_entry(mem, &se_cmd->t_mem_list, se_list)
printk(KERN_INFO "%s: cmd %p mem %p page %p "
"len 0x%x off 0x%x\n",
caller, cmd, mem,
@ -262,9 +260,9 @@ int ft_write_pending(struct se_cmd *se_cmd)
* TCM/LIO target
*/
transport_do_task_sg_chain(se_cmd);
cmd->sg = se_cmd->t_task.t_tasks_sg_chained;
cmd->sg = se_cmd->t_tasks_sg_chained;
cmd->sg_cnt =
se_cmd->t_task.t_tasks_sg_chained_no;
se_cmd->t_tasks_sg_chained_no;
}
if (cmd->sg && lport->tt.ddp_setup(lport, ep->xid,
cmd->sg, cmd->sg_cnt))

21
drivers/target/tcm_fc/tfc_io.c
View File

@ -65,7 +65,6 @@
int ft_queue_data_in(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct se_transport_task *task;
struct fc_frame *fp = NULL;
struct fc_exch *ep;
struct fc_lport *lport;
@ -90,14 +89,13 @@ int ft_queue_data_in(struct se_cmd *se_cmd)
lport = ep->lp;
cmd->seq = lport->tt.seq_start_next(cmd->seq);
task = &se_cmd->t_task;
remaining = se_cmd->data_length;
/*
* Setup to use first mem list entry if any.
*/
if (task->t_tasks_se_num) {
mem = list_first_entry(&task->t_mem_list,
if (se_cmd->t_tasks_se_num) {
mem = list_first_entry(&se_cmd->t_mem_list,
struct se_mem, se_list);
mem_len = mem->se_len;
mem_off = mem->se_off;
@ -148,8 +146,8 @@ int ft_queue_data_in(struct se_cmd *se_cmd)
if (use_sg) {
if (!mem) {
BUG_ON(!task->t_task_buf);
page_addr = task->t_task_buf + mem_off;
BUG_ON(!se_cmd->t_task_buf);
page_addr = se_cmd->t_task_buf + mem_off;
/*
* In this case, offset is 'offset_in_page' of
* (t_task_buf + mem_off) instead of 'mem_off'.
@ -180,7 +178,7 @@ int ft_queue_data_in(struct se_cmd *se_cmd)
kunmap_atomic(page_addr, KM_SOFTIRQ0);
to += tlen;
} else {
from = task->t_task_buf + mem_off;
from = se_cmd->t_task_buf + mem_off;
memcpy(to, from, tlen);
to += tlen;
}
@ -220,7 +218,6 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
struct fc_seq *seq = cmd->seq;
struct fc_exch *ep;
struct fc_lport *lport;
struct se_transport_task *task;
struct fc_frame_header *fh;
struct se_mem *mem;
u32 mem_off;
@ -235,8 +232,6 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
u32 f_ctl;
void *buf;
task = &se_cmd->t_task;
fh = fc_frame_header_get(fp);
if (!(ntoh24(fh->fh_f_ctl) & FC_FC_REL_OFF))
goto drop;
@ -312,8 +307,8 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
/*
* Setup to use first mem list entry if any.
*/
if (task->t_tasks_se_num) {
mem = list_first_entry(&task->t_mem_list,
if (se_cmd->t_tasks_se_num) {
mem = list_first_entry(&se_cmd->t_mem_list,
struct se_mem, se_list);
mem_len = mem->se_len;
mem_off = mem->se_off;
@ -355,7 +350,7 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
memcpy(to, from, tlen);
kunmap_atomic(page_addr, KM_SOFTIRQ0);
} else {
to = task->t_task_buf + mem_off;
to = se_cmd->t_task_buf + mem_off;
memcpy(to, from, tlen);
}
from += tlen;

105
include/target/target_core_base.h
View File

@ -403,64 +403,10 @@ struct se_queue_obj {
wait_queue_head_t thread_wq;
} ____cacheline_aligned;
/*
* Used one per struct se_cmd to hold all extra struct se_task
* metadata. This structure is setup and allocated in
* drivers/target/target_core_transport.c:__transport_alloc_se_cmd()
*/
struct se_transport_task {
unsigned char *t_task_cdb;
unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
unsigned long long t_task_lba;
int t_tasks_failed;
int t_tasks_fua;
bool t_tasks_bidi;
u32 t_task_cdbs;
u32 t_tasks_check;
u32 t_tasks_no;
u32 t_tasks_sectors;
u32 t_tasks_se_num;
u32 t_tasks_se_bidi_num;
u32 t_tasks_sg_chained_no;
atomic_t t_fe_count;
atomic_t t_se_count;
atomic_t t_task_cdbs_left;
atomic_t t_task_cdbs_ex_left;
atomic_t t_task_cdbs_timeout_left;
atomic_t t_task_cdbs_sent;
atomic_t t_transport_aborted;
atomic_t t_transport_active;
atomic_t t_transport_complete;
atomic_t t_transport_queue_active;
atomic_t t_transport_sent;
atomic_t t_transport_stop;
atomic_t t_transport_timeout;
atomic_t transport_dev_active;
atomic_t transport_lun_active;
atomic_t transport_lun_fe_stop;
atomic_t transport_lun_stop;
spinlock_t t_state_lock;
struct completion t_transport_stop_comp;
struct completion transport_lun_fe_stop_comp;
struct completion transport_lun_stop_comp;
struct scatterlist *t_tasks_sg_chained;
struct scatterlist t_tasks_sg_bounce;
void *t_task_buf;
/*
* Used for pre-registered fabric SGL passthrough WRITE and READ
* with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
* and other HW target mode fabric modules.
*/
struct scatterlist *t_task_pt_sgl;
struct list_head t_mem_list;
/* Used for BIDI READ */
struct list_head t_mem_bidi_list;
struct list_head t_task_list;
} ____cacheline_aligned;
struct se_task {
unsigned char task_sense;
struct scatterlist *task_sg;
u32 task_sg_num;
struct scatterlist *task_sg_bidi;
u8 task_scsi_status;
u8 task_flags;
@ -471,8 +417,6 @@ struct se_task {
u32 task_no;
u32 task_sectors;
u32 task_size;
u32 task_sg_num;
u32 task_sg_offset;
enum dma_data_direction task_data_direction;
struct se_cmd *task_se_cmd;
struct se_device *se_dev;
@ -534,13 +478,58 @@ struct se_cmd {
/* Only used for internal passthrough and legacy TCM fabric modules */
struct se_session *se_sess;
struct se_tmr_req *se_tmr_req;
struct se_transport_task t_task;
struct list_head se_queue_node;
struct target_core_fabric_ops *se_tfo;
int (*transport_emulate_cdb)(struct se_cmd *);
void (*transport_split_cdb)(unsigned long long, u32 *, unsigned char *);
void (*transport_wait_for_tasks)(struct se_cmd *, int, int);
void (*transport_complete_callback)(struct se_cmd *);
unsigned char *t_task_cdb;
unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
unsigned long long t_task_lba;
int t_tasks_failed;
int t_tasks_fua;
bool t_tasks_bidi;
u32 t_tasks_se_num;
u32 t_tasks_se_bidi_num;
u32 t_tasks_sg_chained_no;
atomic_t t_fe_count;
atomic_t t_se_count;
atomic_t t_task_cdbs_left;
atomic_t t_task_cdbs_ex_left;
atomic_t t_task_cdbs_timeout_left;
atomic_t t_task_cdbs_sent;
atomic_t t_transport_aborted;
atomic_t t_transport_active;
atomic_t t_transport_complete;
atomic_t t_transport_queue_active;
atomic_t t_transport_sent;
atomic_t t_transport_stop;
atomic_t t_transport_timeout;
atomic_t transport_dev_active;
atomic_t transport_lun_active;
atomic_t transport_lun_fe_stop;
atomic_t transport_lun_stop;
spinlock_t t_state_lock;
struct completion t_transport_stop_comp;
struct completion transport_lun_fe_stop_comp;
struct completion transport_lun_stop_comp;
struct scatterlist *t_tasks_sg_chained;
struct scatterlist t_tasks_sg_bounce;
void *t_task_buf;
/*
* Used for pre-registered fabric SGL passthrough WRITE and READ
* with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
* and other HW target mode fabric modules.
*/
struct scatterlist *t_task_pt_sgl;
u32 t_task_pt_sgl_num;
struct list_head t_mem_list;
/* Used for BIDI READ */
struct list_head t_mem_bidi_list;
struct list_head t_task_list;
u32 t_task_list_num;
} ____cacheline_aligned;
struct se_tmr_req {

5
include/target/target_core_fabric_ops.h
View File

@ -38,11 +38,6 @@ struct target_core_fabric_ops {
* initially allocated in interrupt context.
*/
int (*new_cmd_map)(struct se_cmd *);
/*
* Optional function pointer for TCM fabric modules that use
* Linux/NET sockets to allocate struct iovec array to struct se_cmd
*/
int (*alloc_cmd_iovecs)(struct se_cmd *);
/*
* Optional to release struct se_cmd and fabric dependent allocated
* I/O descriptor in transport_cmd_check_stop()

3
include/target/target_core_transport.h
View File

@ -184,10 +184,11 @@ extern void transport_generic_free_cmd(struct se_cmd *, int, int, int);
extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
extern int transport_init_task_sg(struct se_task *, struct se_mem *, u32);
extern int transport_map_mem_to_sg(struct se_task *, struct list_head *,
void *, struct se_mem *,
struct scatterlist *, struct se_mem *,
struct se_mem **, u32 *, u32 *);
extern void transport_do_task_sg_chain(struct se_cmd *);
extern void transport_generic_process_write(struct se_cmd *);
extern int transport_generic_new_cmd(struct se_cmd *);
extern int transport_generic_do_tmr(struct se_cmd *);
/* From target_core_alua.c */
extern int core_alua_check_nonop_delay(struct se_cmd *);