target: replace various cmd flags with a transport state
Christoph Hellwig [Wed, 21 Dec 2011 19:13:47 +0000 (14:13 -0500)]
Replace various atomic_ts used as flags in struct se_cmd with a single
transport_state bitmap that requires t_state_lock to be held for modifications.

In the target core that assumption generally is true, but some recently added
code in the SRP target had to grow new lock calls.  I can't say I like the way
how it messes with the command state directly, but let's leave that for later.

(Re-add missing ib_srpt.c changes that nab dropped..)

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/infiniband/ulp/srpt/ib_srpt.c
drivers/target/iscsi/iscsi_target.c
drivers/target/iscsi/iscsi_target_erl1.c
drivers/target/iscsi/iscsi_target_tmr.c
drivers/target/target_core_tmr.c
drivers/target/target_core_transport.c
include/target/target_core_base.h

index 2b73d43..e1e6b5b 100644 (file)
@@ -1378,7 +1378,9 @@ static int srpt_abort_cmd(struct srpt_send_ioctx *ioctx)
                break;
        case SRPT_STATE_NEED_DATA:
                /* DMA_TO_DEVICE (write) - RDMA read error. */
-               atomic_set(&ioctx->cmd.transport_lun_stop, 1);
+               spin_lock_irqsave(&ioctx->cmd.t_state_lock, flags);
+               ioctx->cmd.transport_state |= CMD_T_LUN_STOP;
+               spin_unlock_irqrestore(&ioctx->cmd.t_state_lock, flags);
                transport_generic_handle_data(&ioctx->cmd);
                break;
        case SRPT_STATE_CMD_RSP_SENT:
@@ -1387,7 +1389,9 @@ static int srpt_abort_cmd(struct srpt_send_ioctx *ioctx)
                 * not been received in time.
                 */
                srpt_unmap_sg_to_ib_sge(ioctx->ch, ioctx);
-               atomic_set(&ioctx->cmd.transport_lun_stop, 1);
+               spin_lock_irqsave(&ioctx->cmd.t_state_lock, flags);
+               ioctx->cmd.transport_state |= CMD_T_LUN_STOP;
+               spin_unlock_irqrestore(&ioctx->cmd.t_state_lock, flags);
                kref_put(&ioctx->kref, srpt_put_send_ioctx_kref);
                break;
        case SRPT_STATE_MGMT_RSP_SENT:
@@ -1494,6 +1498,7 @@ static void srpt_handle_rdma_err_comp(struct srpt_rdma_ch *ch,
 {
        struct se_cmd *cmd;
        enum srpt_command_state state;
+       unsigned long flags;
 
        cmd = &ioctx->cmd;
        state = srpt_get_cmd_state(ioctx);
@@ -1513,7 +1518,9 @@ static void srpt_handle_rdma_err_comp(struct srpt_rdma_ch *ch,
                               __func__, __LINE__, state);
                break;
        case SRPT_RDMA_WRITE_LAST:
-               atomic_set(&ioctx->cmd.transport_lun_stop, 1);
+               spin_lock_irqsave(&ioctx->cmd.t_state_lock, flags);
+               ioctx->cmd.transport_state |= CMD_T_LUN_STOP;
+               spin_unlock_irqrestore(&ioctx->cmd.t_state_lock, flags);
                break;
        default:
                printk(KERN_ERR "%s[%d]: opcode = %u\n", __func__,
index 4426290..bf0e8e7 100644 (file)
@@ -1363,7 +1363,7 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
                 * outstanding_r2ts reaches zero, go ahead and send the delayed
                 * TASK_ABORTED status.
                 */
-               if (atomic_read(&se_cmd->t_transport_aborted) != 0) {
+               if (se_cmd->transport_state & CMD_T_ABORTED) {
                        if (hdr->flags & ISCSI_FLAG_CMD_FINAL)
                                if (--cmd->outstanding_r2ts < 1) {
                                        iscsit_stop_dataout_timer(cmd);
index 27901e3..006f605 100644 (file)
@@ -416,7 +416,7 @@ static int iscsit_handle_recovery_datain(
        struct iscsi_datain_req *dr;
        struct se_cmd *se_cmd = &cmd->se_cmd;
 
-       if (!atomic_read(&se_cmd->t_transport_complete)) {
+       if (!(se_cmd->transport_state & CMD_T_COMPLETE)) {
                pr_err("Ignoring ITT: 0x%08x Data SNACK\n",
                                cmd->init_task_tag);
                return 0;
index 255ed35..e01da9d 100644 (file)
@@ -250,7 +250,7 @@ static int iscsit_task_reassign_complete_write(
         * so if we have received all DataOUT we can safety ignore Initiator.
         */
        if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) {
-               if (!atomic_read(&cmd->se_cmd.t_transport_sent)) {
+               if (!(cmd->se_cmd.transport_state & CMD_T_SENT)) {
                        pr_debug("WRITE ITT: 0x%08x: t_state: %d"
                                " never sent to transport\n",
                                cmd->init_task_tag, cmd->se_cmd.t_state);
@@ -314,7 +314,7 @@ static int iscsit_task_reassign_complete_read(
                cmd->acked_data_sn = (tmr_req->exp_data_sn - 1);
        }
 
-       if (!atomic_read(&cmd->se_cmd.t_transport_sent)) {
+       if (!(cmd->se_cmd.transport_state & CMD_T_SENT)) {
                pr_debug("READ ITT: 0x%08x: t_state: %d never sent to"
                        " transport\n", cmd->init_task_tag,
                        cmd->se_cmd.t_state);
@@ -322,7 +322,7 @@ static int iscsit_task_reassign_complete_read(
                return 0;
        }
 
-       if (!atomic_read(&se_cmd->t_transport_complete)) {
+       if (!(se_cmd->transport_state & CMD_T_COMPLETE)) {
                pr_err("READ ITT: 0x%08x: t_state: %d, never returned"
                        " from transport\n", cmd->init_task_tag,
                        cmd->se_cmd.t_state);
index dcb0618..a5c2e41 100644 (file)
@@ -150,7 +150,7 @@ static void core_tmr_drain_tmr_list(
                        continue;
 
                spin_lock(&cmd->t_state_lock);
-               if (!atomic_read(&cmd->t_transport_active)) {
+               if (!(cmd->transport_state & CMD_T_ACTIVE)) {
                        spin_unlock(&cmd->t_state_lock);
                        continue;
                }
@@ -255,15 +255,15 @@ static void core_tmr_drain_task_list(
                        cmd->t_task_cdb[0]);
                pr_debug("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",
+                       " t_task_cdbs_sent: %d -- CMD_T_ACTIVE: %d"
+                       " CMD_T_STOP: %d CMD_T_SENT: %d\n",
                        cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key,
                        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));
+                       (cmd->transport_state & CMD_T_ACTIVE) != 0,
+                       (cmd->transport_state & CMD_T_STOP) != 0,
+                       (cmd->transport_state & CMD_T_SENT) != 0);
 
                /*
                 * If the command may be queued onto a workqueue cancel it now.
@@ -287,19 +287,19 @@ static void core_tmr_drain_task_list(
                }
                fe_count = atomic_read(&cmd->t_fe_count);
 
-               if (atomic_read(&cmd->t_transport_active)) {
-                       pr_debug("LUN_RESET: got t_transport_active = 1 for"
+               if (!(cmd->transport_state & CMD_T_ACTIVE)) {
+                       pr_debug("LUN_RESET: got CMD_T_ACTIVE for"
                                " task: %p, t_fe_count: %d dev: %p\n", task,
                                fe_count, dev);
-                       atomic_set(&cmd->t_transport_aborted, 1);
+                       cmd->transport_state |= CMD_T_ABORTED;
                        spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 
                        core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
                        continue;
                }
-               pr_debug("LUN_RESET: Got t_transport_active = 0 for task: %p,"
+               pr_debug("LUN_RESET: Got !CMD_T_ACTIVE for task: %p,"
                        " t_fe_count: %d dev: %p\n", task, fe_count, dev);
-               atomic_set(&cmd->t_transport_aborted, 1);
+               cmd->transport_state |= CMD_T_ABORTED;
                spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 
                core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
@@ -339,7 +339,7 @@ static void core_tmr_drain_cmd_list(
                if (prout_cmd == cmd)
                        continue;
 
-               atomic_set(&cmd->t_transport_queue_active, 0);
+               cmd->transport_state &= ~CMD_T_QUEUED;
                atomic_dec(&qobj->queue_cnt);
                list_move_tail(&cmd->se_queue_node, &drain_cmd_list);
        }
index 58cea07..f704123 100644 (file)
@@ -437,7 +437,7 @@ static void transport_all_task_dev_remove_state(struct se_cmd *cmd)
 
 /*     transport_cmd_check_stop():
  *
- *     'transport_off = 1' determines if t_transport_active should be cleared.
+ *     'transport_off = 1' determines if CMD_T_ACTIVE should be cleared.
  *     'transport_off = 2' determines if task_dev_state should be removed.
  *
  *     A non-zero u8 t_state sets cmd->t_state.
@@ -455,12 +455,11 @@ static int transport_cmd_check_stop(
         * Determine if IOCTL context caller in requesting the stopping of this
         * command for LUN shutdown purposes.
         */
-       if (atomic_read(&cmd->transport_lun_stop)) {
-               pr_debug("%s:%d atomic_read(&cmd->transport_lun_stop)"
-                       " == TRUE for ITT: 0x%08x\n", __func__, __LINE__,
-                       cmd->se_tfo->get_task_tag(cmd));
+       if (cmd->transport_state & CMD_T_LUN_STOP) {
+               pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n",
+                       __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd));
 
-               atomic_set(&cmd->t_transport_active, 0);
+               cmd->transport_state &= ~CMD_T_ACTIVE;
                if (transport_off == 2)
                        transport_all_task_dev_remove_state(cmd);
                spin_unlock_irqrestore(&cmd->t_state_lock, flags);
@@ -472,9 +471,9 @@ static int transport_cmd_check_stop(
         * Determine if frontend context caller is requesting the stopping of
         * this command for frontend exceptions.
         */
-       if (atomic_read(&cmd->t_transport_stop)) {
-               pr_debug("%s:%d atomic_read(&cmd->t_transport_stop) =="
-                       " TRUE for ITT: 0x%08x\n", __func__, __LINE__,
+       if (cmd->transport_state & CMD_T_STOP) {
+               pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n",
+                       __func__, __LINE__,
                        cmd->se_tfo->get_task_tag(cmd));
 
                if (transport_off == 2)
@@ -492,7 +491,7 @@ static int transport_cmd_check_stop(
                return 1;
        }
        if (transport_off) {
-               atomic_set(&cmd->t_transport_active, 0);
+               cmd->transport_state &= ~CMD_T_ACTIVE;
                if (transport_off == 2) {
                        transport_all_task_dev_remove_state(cmd);
                        /*
@@ -540,16 +539,12 @@ static void transport_lun_remove_cmd(struct se_cmd *cmd)
                return;
 
        spin_lock_irqsave(&cmd->t_state_lock, flags);
-       if (!atomic_read(&cmd->transport_dev_active)) {
-               spin_unlock_irqrestore(&cmd->t_state_lock, flags);
-               goto check_lun;
+       if (cmd->transport_state & CMD_T_DEV_ACTIVE) {
+               cmd->transport_state &= ~CMD_T_DEV_ACTIVE;
+               transport_all_task_dev_remove_state(cmd);
        }
-       atomic_set(&cmd->transport_dev_active, 0);
-       transport_all_task_dev_remove_state(cmd);
        spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 
-
-check_lun:
        spin_lock_irqsave(&lun->lun_cmd_lock, flags);
        if (atomic_read(&cmd->transport_lun_active)) {
                list_del(&cmd->se_lun_node);
@@ -585,7 +580,7 @@ static void transport_add_cmd_to_queue(struct se_cmd *cmd, int t_state,
        if (t_state) {
                spin_lock_irqsave(&cmd->t_state_lock, flags);
                cmd->t_state = t_state;
-               atomic_set(&cmd->t_transport_active, 1);
+               cmd->transport_state |= CMD_T_ACTIVE;
                spin_unlock_irqrestore(&cmd->t_state_lock, flags);
        }
 
@@ -601,7 +596,7 @@ static void transport_add_cmd_to_queue(struct se_cmd *cmd, int t_state,
                list_add(&cmd->se_queue_node, &qobj->qobj_list);
        else
                list_add_tail(&cmd->se_queue_node, &qobj->qobj_list);
-       atomic_set(&cmd->t_transport_queue_active, 1);
+       cmd->transport_state |= CMD_T_QUEUED;
        spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
 
        wake_up_interruptible(&qobj->thread_wq);
@@ -620,8 +615,7 @@ transport_get_cmd_from_queue(struct se_queue_obj *qobj)
        }
        cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node);
 
-       atomic_set(&cmd->t_transport_queue_active, 0);
-
+       cmd->transport_state &= ~CMD_T_QUEUED;
        list_del_init(&cmd->se_queue_node);
        atomic_dec(&qobj->queue_cnt);
        spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
@@ -635,20 +629,14 @@ static void transport_remove_cmd_from_queue(struct se_cmd *cmd)
        unsigned long flags;
 
        spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
-       if (!atomic_read(&cmd->t_transport_queue_active)) {
+       if (!(cmd->transport_state & CMD_T_QUEUED)) {
                spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
                return;
        }
-       atomic_set(&cmd->t_transport_queue_active, 0);
+       cmd->transport_state &= ~CMD_T_QUEUED;
        atomic_dec(&qobj->queue_cnt);
        list_del_init(&cmd->se_queue_node);
        spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
-
-       if (atomic_read(&cmd->t_transport_queue_active)) {
-               pr_err("ITT: 0x%08x t_transport_queue_active: %d\n",
-                       cmd->se_tfo->get_task_tag(cmd),
-                       atomic_read(&cmd->t_transport_queue_active));
-       }
 }
 
 /*
@@ -719,7 +707,7 @@ void transport_complete_task(struct se_task *task, int success)
        }
 
        if (!success)
-               cmd->t_tasks_failed = 1;
+               cmd->transport_state |= CMD_T_FAILED;
 
        /*
         * Decrement the outstanding t_task_cdbs_left count.  The last
@@ -731,16 +719,16 @@ void transport_complete_task(struct se_task *task, int success)
                return;
        }
 
-       if (cmd->t_tasks_failed) {
+       if (cmd->transport_state & CMD_T_FAILED) {
                cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
                INIT_WORK(&cmd->work, target_complete_failure_work);
        } else {
-               atomic_set(&cmd->t_transport_complete, 1);
+               cmd->transport_state |= CMD_T_COMPLETE;
                INIT_WORK(&cmd->work, target_complete_ok_work);
        }
 
        cmd->t_state = TRANSPORT_COMPLETE;
-       atomic_set(&cmd->t_transport_active, 1);
+       cmd->transport_state |= CMD_T_ACTIVE;
        spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 
        queue_work(target_completion_wq, &cmd->work);
@@ -1488,7 +1476,7 @@ void transport_init_se_cmd(
        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);
+       cmd->transport_state = CMD_T_DEV_ACTIVE;
 
        cmd->se_tfo = tfo;
        cmd->se_sess = se_sess;
@@ -1618,7 +1606,7 @@ int transport_handle_cdb_direct(
                return -EINVAL;
        }
        /*
-        * Set TRANSPORT_NEW_CMD state and cmd->t_transport_active=1 following
+        * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE following
         * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue()
         * in existing usage to ensure that outstanding descriptors are handled
         * correctly during shutdown via transport_wait_for_tasks()
@@ -1627,7 +1615,8 @@ int transport_handle_cdb_direct(
         * this to be called for initial descriptor submission.
         */
        cmd->t_state = TRANSPORT_NEW_CMD;
-       atomic_set(&cmd->t_transport_active, 1);
+       cmd->transport_state |= CMD_T_ACTIVE;
+
        /*
         * transport_generic_new_cmd() is already handling QUEUE_FULL,
         * so follow TRANSPORT_NEW_CMD processing thread context usage
@@ -1859,14 +1848,14 @@ static void transport_generic_request_failure(struct se_cmd *cmd)
                cmd->t_state, cmd->scsi_sense_reason);
        pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d"
                " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --"
-               " t_transport_active: %d t_transport_stop: %d"
-               " t_transport_sent: %d\n", cmd->t_task_list_num,
+               " CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n",
+               cmd->t_task_list_num,
                atomic_read(&cmd->t_task_cdbs_left),
                atomic_read(&cmd->t_task_cdbs_sent),
                atomic_read(&cmd->t_task_cdbs_ex_left),
-               atomic_read(&cmd->t_transport_active),
-               atomic_read(&cmd->t_transport_stop),
-               atomic_read(&cmd->t_transport_sent));
+               (cmd->transport_state & CMD_T_ACTIVE) != 0,
+               (cmd->transport_state & CMD_T_STOP) != 0,
+               (cmd->transport_state & CMD_T_SENT) != 0);
 
        /*
         * For SAM Task Attribute emulation for failed struct se_cmd
@@ -2125,7 +2114,7 @@ check_depth:
 
        if (atomic_read(&cmd->t_task_cdbs_sent) ==
            cmd->t_task_list_num)
-               atomic_set(&cmd->t_transport_sent, 1);
+               cmd->transport_state |= CMD_T_SENT;
 
        spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 
@@ -2136,8 +2125,9 @@ check_depth:
        if (error != 0) {
                spin_lock_irqsave(&cmd->t_state_lock, flags);
                task->task_flags &= ~TF_ACTIVE;
+               cmd->transport_state &= ~CMD_T_SENT;
                spin_unlock_irqrestore(&cmd->t_state_lock, flags);
-               atomic_set(&cmd->t_transport_sent, 0);
+
                transport_stop_tasks_for_cmd(cmd);
                transport_generic_request_failure(cmd);
        }
@@ -3420,8 +3410,8 @@ static void transport_put_cmd(struct se_cmd *cmd)
                        goto out_busy;
        }
 
-       if (atomic_read(&cmd->transport_dev_active)) {
-               atomic_set(&cmd->transport_dev_active, 0);
+       if (cmd->transport_state & CMD_T_DEV_ACTIVE) {
+               cmd->transport_state &= ~CMD_T_DEV_ACTIVE;
                transport_all_task_dev_remove_state(cmd);
                free_tasks = 1;
        }
@@ -3859,8 +3849,10 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
        if (task_cdbs < 0)
                goto out_fail;
        else if (!task_cdbs && (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)) {
+               spin_lock_irq(&cmd->t_state_lock);
                cmd->t_state = TRANSPORT_COMPLETE;
-               atomic_set(&cmd->t_transport_active, 1);
+               cmd->transport_state |= CMD_T_ACTIVE;
+               spin_unlock_irq(&cmd->t_state_lock);
 
                if (cmd->t_task_cdb[0] == REQUEST_SENSE) {
                        u8 ua_asc = 0, ua_ascq = 0;
@@ -3941,9 +3933,9 @@ static int transport_generic_write_pending(struct se_cmd *cmd)
 
        /*
         * Clear the se_cmd for WRITE_PENDING status in order to set
-        * cmd->t_transport_active=0 so that transport_generic_handle_data
-        * can be called from HW target mode interrupt code.  This is safe
-        * to be called with transport_off=1 before the cmd->se_tfo->write_pending
+        * CMD_T_ACTIVE so that transport_generic_handle_data can be called
+        * from HW target mode interrupt code.  This is safe to be called
+        * with transport_off=1 before the cmd->se_tfo->write_pending
         * because the se_cmd->se_lun pointer is not being cleared.
         */
        transport_cmd_check_stop(cmd, 1, 0);
@@ -4129,15 +4121,16 @@ static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun)
         * be stopped, we can safely ignore this struct se_cmd.
         */
        spin_lock_irqsave(&cmd->t_state_lock, flags);
-       if (atomic_read(&cmd->t_transport_stop)) {
-               atomic_set(&cmd->transport_lun_stop, 0);
-               pr_debug("ConfigFS ITT[0x%08x] - t_transport_stop =="
-                       " TRUE, skipping\n", cmd->se_tfo->get_task_tag(cmd));
+       if (cmd->transport_state & CMD_T_STOP) {
+               cmd->transport_state &= ~CMD_T_LUN_STOP;
+
+               pr_debug("ConfigFS ITT[0x%08x] - CMD_T_STOP, skipping\n",
+                        cmd->se_tfo->get_task_tag(cmd));
                spin_unlock_irqrestore(&cmd->t_state_lock, flags);
                transport_cmd_check_stop(cmd, 1, 0);
                return -EPERM;
        }
-       atomic_set(&cmd->transport_lun_fe_stop, 1);
+       cmd->transport_state |= CMD_T_LUN_FE_STOP;
        spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 
        wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq);
@@ -4183,7 +4176,7 @@ static void __transport_clear_lun_from_sessions(struct se_lun *lun)
                        "_lun_stop for  ITT: 0x%08x\n",
                        cmd->se_lun->unpacked_lun,
                        cmd->se_tfo->get_task_tag(cmd));
-               atomic_set(&cmd->transport_lun_stop, 1);
+               cmd->transport_state |= CMD_T_LUN_STOP;
                spin_unlock(&cmd->t_state_lock);
 
                spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags);
@@ -4213,11 +4206,11 @@ static void __transport_clear_lun_from_sessions(struct se_lun *lun)
                        cmd->se_tfo->get_task_tag(cmd));
 
                spin_lock_irqsave(&cmd->t_state_lock, cmd_flags);
-               if (!atomic_read(&cmd->transport_dev_active)) {
+               if (!(cmd->transport_state & CMD_T_DEV_ACTIVE)) {
                        spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags);
                        goto check_cond;
                }
-               atomic_set(&cmd->transport_dev_active, 0);
+               cmd->transport_state &= ~CMD_T_DEV_ACTIVE;
                transport_all_task_dev_remove_state(cmd);
                spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags);
 
@@ -4237,7 +4230,7 @@ check_cond:
                 * finished accessing it.
                 */
                spin_lock_irqsave(&cmd->t_state_lock, cmd_flags);
-               if (atomic_read(&cmd->transport_lun_fe_stop)) {
+               if (cmd->transport_state & CMD_T_LUN_FE_STOP) {
                        pr_debug("SE_LUN[%d] - Detected FE stop for"
                                " struct se_cmd: %p ITT: 0x%08x\n",
                                lun->unpacked_lun,
@@ -4315,8 +4308,7 @@ bool transport_wait_for_tasks(struct se_cmd *cmd)
         * transport_clear_lun_from_sessions() once the ConfigFS context caller
         * has completed its operation on the struct se_cmd.
         */
-       if (atomic_read(&cmd->transport_lun_stop)) {
-
+       if (cmd->transport_state & CMD_T_LUN_STOP) {
                pr_debug("wait_for_tasks: Stopping"
                        " wait_for_completion(&cmd->t_tasktransport_lun_fe"
                        "_stop_comp); for ITT: 0x%08x\n",
@@ -4344,18 +4336,19 @@ bool transport_wait_for_tasks(struct se_cmd *cmd)
                        "stop_comp); for ITT: 0x%08x\n",
                        cmd->se_tfo->get_task_tag(cmd));
 
-               atomic_set(&cmd->transport_lun_stop, 0);
+               cmd->transport_state &= ~CMD_T_LUN_STOP;
        }
-       if (!atomic_read(&cmd->t_transport_active) ||
-            atomic_read(&cmd->t_transport_aborted)) {
+
+       if (!(cmd->transport_state & CMD_T_ACTIVE) ||
+            (cmd->transport_state & CMD_T_ABORTED)) {
                spin_unlock_irqrestore(&cmd->t_state_lock, flags);
                return false;
        }
 
-       atomic_set(&cmd->t_transport_stop, 1);
+       cmd->transport_state |= CMD_T_STOP;
 
        pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x"
-               " i_state: %d, t_state: %d, t_transport_stop = TRUE\n",
+               " i_state: %d, t_state: %d, CMD_T_STOP\n",
                cmd, cmd->se_tfo->get_task_tag(cmd),
                cmd->se_tfo->get_cmd_state(cmd), cmd->t_state);
 
@@ -4366,8 +4359,7 @@ bool transport_wait_for_tasks(struct se_cmd *cmd)
        wait_for_completion(&cmd->t_transport_stop_comp);
 
        spin_lock_irqsave(&cmd->t_state_lock, flags);
-       atomic_set(&cmd->t_transport_active, 0);
-       atomic_set(&cmd->t_transport_stop, 0);
+       cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP);
 
        pr_debug("wait_for_tasks: Stopped wait_for_compltion("
                "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n",
@@ -4596,7 +4588,7 @@ int transport_check_aborted_status(struct se_cmd *cmd, int send_status)
 {
        int ret = 0;
 
-       if (atomic_read(&cmd->t_transport_aborted) != 0) {
+       if (cmd->transport_state & CMD_T_ABORTED) {
                if (!send_status ||
                     (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS))
                        return 1;
@@ -4633,7 +4625,7 @@ void transport_send_task_abort(struct se_cmd *cmd)
         */
        if (cmd->data_direction == DMA_TO_DEVICE) {
                if (cmd->se_tfo->write_pending_status(cmd) != 0) {
-                       atomic_inc(&cmd->t_transport_aborted);
+                       cmd->transport_state |= CMD_T_ABORTED;
                        smp_mb__after_atomic_inc();
                }
        }
index dc4e345..9e7a6a5 100644 (file)
@@ -555,23 +555,24 @@ 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;
        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_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                transport_dev_active;
+       unsigned int            transport_state;
+#define CMD_T_ABORTED          (1 << 0)
+#define CMD_T_ACTIVE           (1 << 1)
+#define CMD_T_COMPLETE         (1 << 2)
+#define CMD_T_QUEUED           (1 << 3)
+#define CMD_T_SENT             (1 << 4)
+#define CMD_T_STOP             (1 << 5)
+#define CMD_T_FAILED           (1 << 6)
+#define CMD_T_LUN_STOP         (1 << 7)
+#define CMD_T_LUN_FE_STOP      (1 << 8)
+#define CMD_T_DEV_ACTIVE       (1 << 9)
        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;