* xmit thread
*/
if (!list_empty(&session->leadconn->xmitqueue) ||
- __kfifo_len(session->leadconn->mgmtqueue))
+ !list_empty(&session->leadconn->mgmtqueue))
scsi_queue_work(session->host,
&session->leadconn->xmitwork);
}
conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
conn->tmfrsp_pdus_cnt++;
- if (conn->tmabort_state != TMABORT_INITIAL)
+ if (conn->tmf_state != TMF_QUEUED)
return;
if (tmf->response == ISCSI_TMF_RSP_COMPLETE)
- conn->tmabort_state = TMABORT_SUCCESS;
+ conn->tmf_state = TMF_SUCCESS;
else if (tmf->response == ISCSI_TMF_RSP_NO_TASK)
- conn->tmabort_state = TMABORT_NOT_FOUND;
+ conn->tmf_state = TMF_NOT_FOUND;
else
- conn->tmabort_state = TMABORT_FAILED;
+ conn->tmf_state = TMF_FAILED;
wake_up(&conn->ehwait);
}
*/
if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen))
rc = ISCSI_ERR_CONN_FAILED;
- list_del(&mtask->running);
+ list_del_init(&mtask->running);
if (conn->login_mtask != mtask)
__kfifo_put(session->mgmtpool.queue,
(void*)&mtask, sizeof(void*));
if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen))
rc = ISCSI_ERR_CONN_FAILED;
- list_del(&mtask->running);
- if (conn->login_mtask != mtask)
- __kfifo_put(session->mgmtpool.queue,
- (void*)&mtask, sizeof(void*));
+ list_del_init(&mtask->running);
+ __kfifo_put(session->mgmtpool.queue,
+ (void*)&mtask, sizeof(void*));
break;
default:
rc = ISCSI_ERR_BAD_OPCODE;
session->tt->init_mgmt_task(conn, mtask);
debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n",
- hdr->opcode, hdr->itt, mtask->data_count);
+ hdr->opcode & ISCSI_OPCODE_MASK, hdr->itt,
+ mtask->data_count);
}
static int iscsi_xmit_mtask(struct iscsi_conn *conn)
static int iscsi_xmit_ctask(struct iscsi_conn *conn)
{
struct iscsi_cmd_task *ctask = conn->ctask;
- int rc = 0;
-
- /*
- * serialize with TMF AbortTask
- */
- if (ctask->state == ISCSI_TASK_ABORTING)
- goto done;
+ int rc;
__iscsi_get_ctask(ctask);
spin_unlock_bh(&conn->session->lock);
rc = conn->session->tt->xmit_cmd_task(conn, ctask);
spin_lock_bh(&conn->session->lock);
__iscsi_put_ctask(ctask);
-
-done:
if (!rc)
/* done with this ctask */
conn->ctask = NULL;
return rc;
}
+/**
+ * iscsi_requeue_ctask - requeue ctask to run from session workqueue
+ * @ctask: ctask to requeue
+ *
+ * LLDs that need to run a ctask from the session workqueue should call
+ * this. The session lock must be held.
+ */
+void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask)
+{
+ struct iscsi_conn *conn = ctask->conn;
+
+ list_move_tail(&ctask->running, &conn->requeue);
+ scsi_queue_work(conn->session->host, &conn->xmitwork);
+}
+EXPORT_SYMBOL_GPL(iscsi_requeue_ctask);
+
/**
* iscsi_data_xmit - xmit any command into the scheduled connection
* @conn: iscsi connection
* overflow us with nop-ins
*/
check_mgmt:
- while (__kfifo_get(conn->mgmtqueue, (void*)&conn->mtask,
- sizeof(void*))) {
+ while (!list_empty(&conn->mgmtqueue)) {
+ conn->mtask = list_entry(conn->mgmtqueue.next,
+ struct iscsi_mgmt_task, running);
iscsi_prep_mtask(conn, conn->mtask);
- list_add_tail(&conn->mtask->running, &conn->mgmt_run_list);
+ list_move_tail(conn->mgmtqueue.next, &conn->mgmt_run_list);
rc = iscsi_xmit_mtask(conn);
if (rc)
goto again;
}
- /* process command queue */
+ /* process pending command queue */
while (!list_empty(&conn->xmitqueue)) {
- /*
- * iscsi tcp may readd the task to the xmitqueue to send
- * write data
- */
+ if (conn->tmf_state == TMF_QUEUED)
+ break;
+
conn->ctask = list_entry(conn->xmitqueue.next,
struct iscsi_cmd_task, running);
- switch (conn->ctask->state) {
- case ISCSI_TASK_ABORTING:
- break;
- case ISCSI_TASK_PENDING:
- iscsi_prep_scsi_cmd_pdu(conn->ctask);
- conn->session->tt->init_cmd_task(conn->ctask);
- /* fall through */
- default:
- conn->ctask->state = ISCSI_TASK_RUNNING;
- break;
- }
+ iscsi_prep_scsi_cmd_pdu(conn->ctask);
+ conn->session->tt->init_cmd_task(conn->ctask);
+ conn->ctask->state = ISCSI_TASK_RUNNING;
list_move_tail(conn->xmitqueue.next, &conn->run_list);
-
rc = iscsi_xmit_ctask(conn);
if (rc)
goto again;
* we need to check the mgmt queue for nops that need to
* be sent to aviod starvation
*/
- if (__kfifo_len(conn->mgmtqueue))
+ if (!list_empty(&conn->mgmtqueue))
+ goto check_mgmt;
+ }
+
+ while (!list_empty(&conn->requeue)) {
+ if (conn->session->fast_abort && conn->tmf_state != TMF_INITIAL)
+ break;
+
+ conn->ctask = list_entry(conn->requeue.next,
+ struct iscsi_cmd_task, running);
+ conn->ctask->state = ISCSI_TASK_RUNNING;
+ list_move_tail(conn->requeue.next, &conn->run_list);
+ rc = iscsi_xmit_ctask(conn);
+ if (rc)
+ goto again;
+ if (!list_empty(&conn->mgmtqueue))
goto check_mgmt;
}
spin_unlock_bh(&conn->session->lock);
atomic_set(&ctask->refcount, 1);
ctask->state = ISCSI_TASK_PENDING;
- ctask->mtask = NULL;
ctask->conn = conn;
ctask->sc = sc;
INIT_LIST_HEAD(&ctask->running);
} else
mtask->data_count = 0;
- INIT_LIST_HEAD(&mtask->running);
memcpy(mtask->hdr, hdr, sizeof(struct iscsi_hdr));
- __kfifo_put(conn->mgmtqueue, (void*)&mtask, sizeof(void*));
+ INIT_LIST_HEAD(&mtask->running);
+ list_add_tail(&mtask->running, &conn->mgmtqueue);
return mtask;
}
void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session)
{
struct iscsi_session *session = class_to_transport_session(cls_session);
- struct iscsi_conn *conn = session->leadconn;
spin_lock_bh(&session->lock);
if (session->state != ISCSI_STATE_LOGGED_IN) {
session->state = ISCSI_STATE_RECOVERY_FAILED;
- if (conn)
- wake_up(&conn->ehwait);
+ if (session->leadconn)
+ wake_up(&session->leadconn->ehwait);
}
spin_unlock_bh(&session->lock);
}
struct Scsi_Host *host = sc->device->host;
struct iscsi_session *session = iscsi_hostdata(host->hostdata);
struct iscsi_conn *conn = session->leadconn;
- int fail_session = 0;
spin_lock_bh(&session->lock);
if (session->state == ISCSI_STATE_TERMINATE) {
return FAILED;
}
- if (sc->SCp.phase == session->age) {
- debug_scsi("failing connection CID %d due to SCSI host reset\n",
- conn->id);
- fail_session = 1;
- }
spin_unlock_bh(&session->lock);
/*
* we drop the lock here but the leadconn cannot be destoyed while
* we are in the scsi eh
*/
- if (fail_session)
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
debug_scsi("iscsi_eh_host_reset wait for relogin\n");
wait_event_interruptible(conn->ehwait,
}
EXPORT_SYMBOL_GPL(iscsi_eh_host_reset);
-static void iscsi_tmabort_timedout(unsigned long data)
+static void iscsi_tmf_timedout(unsigned long data)
{
- struct iscsi_cmd_task *ctask = (struct iscsi_cmd_task *)data;
- struct iscsi_conn *conn = ctask->conn;
+ struct iscsi_conn *conn = (struct iscsi_conn *)data;
struct iscsi_session *session = conn->session;
spin_lock(&session->lock);
- if (conn->tmabort_state == TMABORT_INITIAL) {
- conn->tmabort_state = TMABORT_TIMEDOUT;
- debug_scsi("tmabort timedout [sc %p itt 0x%x]\n",
- ctask->sc, ctask->itt);
+ if (conn->tmf_state == TMF_QUEUED) {
+ conn->tmf_state = TMF_TIMEDOUT;
+ debug_scsi("tmf timedout\n");
/* unblock eh_abort() */
wake_up(&conn->ehwait);
}
spin_unlock(&session->lock);
}
-static int iscsi_exec_abort_task(struct scsi_cmnd *sc,
- struct iscsi_cmd_task *ctask)
+static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
+ struct iscsi_tm *hdr, int age)
{
- struct iscsi_conn *conn = ctask->conn;
struct iscsi_session *session = conn->session;
- struct iscsi_tm *hdr = &conn->tmhdr;
-
- /*
- * ctask timed out but session is OK requests must be serialized.
- */
- memset(hdr, 0, sizeof(struct iscsi_tm));
- hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE;
- hdr->flags = ISCSI_TM_FUNC_ABORT_TASK;
- hdr->flags |= ISCSI_FLAG_CMD_FINAL;
- memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun));
- hdr->rtt = ctask->hdr->itt;
- hdr->refcmdsn = ctask->hdr->cmdsn;
+ struct iscsi_mgmt_task *mtask;
- ctask->mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr,
- NULL, 0);
- if (!ctask->mtask) {
+ mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr,
+ NULL, 0);
+ if (!mtask) {
spin_unlock_bh(&session->lock);
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
- spin_lock_bh(&session->lock)
- debug_scsi("abort sent failure [itt 0x%x]\n", ctask->itt);
+ spin_lock_bh(&session->lock);
+ debug_scsi("tmf exec failure\n");
return -EPERM;
}
- ctask->state = ISCSI_TASK_ABORTING;
-
- debug_scsi("abort sent [itt 0x%x]\n", ctask->itt);
+ conn->tmfcmd_pdus_cnt++;
+ conn->tmf_timer.expires = 30 * HZ + jiffies;
+ conn->tmf_timer.function = iscsi_tmf_timedout;
+ conn->tmf_timer.data = (unsigned long)conn;
+ add_timer(&conn->tmf_timer);
+ debug_scsi("tmf set timeout\n");
- if (conn->tmabort_state == TMABORT_INITIAL) {
- conn->tmfcmd_pdus_cnt++;
- conn->tmabort_timer.expires = 20*HZ + jiffies;
- conn->tmabort_timer.function = iscsi_tmabort_timedout;
- conn->tmabort_timer.data = (unsigned long)ctask;
- add_timer(&conn->tmabort_timer);
- debug_scsi("abort set timeout [itt 0x%x]\n", ctask->itt);
- }
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
scsi_queue_work(session->host, &conn->xmitwork);
/*
* block eh thread until:
*
- * 1) abort response
- * 2) abort timeout
+ * 1) tmf response
+ * 2) tmf timeout
* 3) session is terminated or restarted or userspace has
* given up on recovery
*/
- wait_event_interruptible(conn->ehwait,
- sc->SCp.phase != session->age ||
+ wait_event_interruptible(conn->ehwait, age != session->age ||
session->state != ISCSI_STATE_LOGGED_IN ||
- conn->tmabort_state != TMABORT_INITIAL);
+ conn->tmf_state != TMF_QUEUED);
if (signal_pending(current))
flush_signals(current);
- del_timer_sync(&conn->tmabort_timer);
+ del_timer_sync(&conn->tmf_timer);
+
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
- return 0;
-}
-
-/*
- * session lock must be held
- */
-static struct iscsi_mgmt_task *
-iscsi_remove_mgmt_task(struct kfifo *fifo, uint32_t itt)
-{
- int i, nr_tasks = __kfifo_len(fifo) / sizeof(void*);
- struct iscsi_mgmt_task *task;
-
- debug_scsi("searching %d tasks\n", nr_tasks);
-
- for (i = 0; i < nr_tasks; i++) {
- __kfifo_get(fifo, (void*)&task, sizeof(void*));
- debug_scsi("check task %u\n", task->itt);
-
- if (task->itt == itt) {
- debug_scsi("matched task\n");
- return task;
- }
+ /* if the session drops it will clean up the mtask */
+ if (age != session->age ||
+ session->state != ISCSI_STATE_LOGGED_IN)
+ return -ENOTCONN;
- __kfifo_put(fifo, (void*)&task, sizeof(void*));
+ if (!list_empty(&mtask->running)) {
+ list_del_init(&mtask->running);
+ __kfifo_put(session->mgmtpool.queue, (void*)&mtask,
+ sizeof(void*));
}
- return NULL;
-}
-
-static int iscsi_ctask_mtask_cleanup(struct iscsi_cmd_task *ctask)
-{
- struct iscsi_conn *conn = ctask->conn;
- struct iscsi_session *session = conn->session;
-
- if (!ctask->mtask)
- return -EINVAL;
-
- if (!iscsi_remove_mgmt_task(conn->mgmtqueue, ctask->mtask->itt))
- list_del(&ctask->mtask->running);
- __kfifo_put(session->mgmtpool.queue, (void*)&ctask->mtask,
- sizeof(void*));
- ctask->mtask = NULL;
return 0;
}
conn->session->queued_cmdsn--;
else
conn->session->tt->cleanup_cmd_task(conn, ctask);
- iscsi_ctask_mtask_cleanup(ctask);
sc->result = err;
scsi_set_resid(sc, scsi_bufflen(sc));
__iscsi_put_ctask(ctask);
}
+/*
+ * Fail commands. session lock held and recv side suspended and xmit
+ * thread flushed
+ */
+static void fail_all_commands(struct iscsi_conn *conn, unsigned lun)
+{
+ struct iscsi_cmd_task *ctask, *tmp;
+
+ if (conn->ctask && (conn->ctask->sc->device->lun == lun || lun == -1))
+ conn->ctask = NULL;
+
+ /* flush pending */
+ list_for_each_entry_safe(ctask, tmp, &conn->xmitqueue, running) {
+ if (lun == ctask->sc->device->lun || lun == -1) {
+ debug_scsi("failing pending sc %p itt 0x%x\n",
+ ctask->sc, ctask->itt);
+ fail_command(conn, ctask, DID_BUS_BUSY << 16);
+ }
+ }
+
+ list_for_each_entry_safe(ctask, tmp, &conn->requeue, running) {
+ if (lun == ctask->sc->device->lun || lun == -1) {
+ debug_scsi("failing requeued sc %p itt 0x%x\n",
+ ctask->sc, ctask->itt);
+ fail_command(conn, ctask, DID_BUS_BUSY << 16);
+ }
+ }
+
+ /* fail all other running */
+ list_for_each_entry_safe(ctask, tmp, &conn->run_list, running) {
+ if (lun == ctask->sc->device->lun || lun == -1) {
+ debug_scsi("failing in progress sc %p itt 0x%x\n",
+ ctask->sc, ctask->itt);
+ fail_command(conn, ctask, DID_BUS_BUSY << 16);
+ }
+ }
+}
+
static void iscsi_suspend_tx(struct iscsi_conn *conn)
{
set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
scsi_queue_work(conn->session->host, &conn->xmitwork);
}
+static void iscsi_prep_abort_task_pdu(struct iscsi_cmd_task *ctask,
+ struct iscsi_tm *hdr)
+{
+ memset(hdr, 0, sizeof(*hdr));
+ hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE;
+ hdr->flags = ISCSI_TM_FUNC_ABORT_TASK & ISCSI_FLAG_TM_FUNC_MASK;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun));
+ hdr->rtt = ctask->hdr->itt;
+ hdr->refcmdsn = ctask->hdr->cmdsn;
+}
+
int iscsi_eh_abort(struct scsi_cmnd *sc)
{
struct Scsi_Host *host = sc->device->host;
struct iscsi_session *session = iscsi_hostdata(host->hostdata);
- struct iscsi_cmd_task *ctask;
struct iscsi_conn *conn;
- int rc;
+ struct iscsi_cmd_task *ctask;
+ struct iscsi_tm *hdr;
+ int rc, age;
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
return SUCCESS;
}
- ctask = (struct iscsi_cmd_task *)sc->SCp.ptr;
- conn = ctask->conn;
-
- conn->eh_abort_cnt++;
- debug_scsi("aborting [sc %p itt 0x%x]\n", sc, ctask->itt);
-
/*
* If we are not logged in or we have started a new session
* then let the host reset code handle this
*/
- if (session->state != ISCSI_STATE_LOGGED_IN ||
- sc->SCp.phase != session->age)
- goto failed;
+ if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN ||
+ sc->SCp.phase != session->age) {
+ spin_unlock_bh(&session->lock);
+ mutex_unlock(&session->eh_mutex);
+ return FAILED;
+ }
+
+ conn = session->leadconn;
+ conn->eh_abort_cnt++;
+ age = session->age;
+
+ ctask = (struct iscsi_cmd_task *)sc->SCp.ptr;
+ debug_scsi("aborting [sc %p itt 0x%x]\n", sc, ctask->itt);
/* ctask completed before time out */
if (!ctask->sc) {
goto success;
}
- /* what should we do here ? */
- if (conn->ctask == ctask) {
- printk(KERN_INFO "iscsi: sc %p itt 0x%x partially sent. "
- "Failing abort\n", sc, ctask->itt);
- goto failed;
- }
-
if (ctask->state == ISCSI_TASK_PENDING) {
fail_command(conn, ctask, DID_ABORT << 16);
goto success;
}
- conn->tmabort_state = TMABORT_INITIAL;
- rc = iscsi_exec_abort_task(sc, ctask);
- if (rc || sc->SCp.phase != session->age ||
- session->state != ISCSI_STATE_LOGGED_IN)
+ /* only have one tmf outstanding at a time */
+ if (conn->tmf_state != TMF_INITIAL)
goto failed;
- iscsi_ctask_mtask_cleanup(ctask);
+ conn->tmf_state = TMF_QUEUED;
- switch (conn->tmabort_state) {
- case TMABORT_SUCCESS:
+ hdr = &conn->tmhdr;
+ iscsi_prep_abort_task_pdu(ctask, hdr);
+
+ if (iscsi_exec_task_mgmt_fn(conn, hdr, age)) {
+ rc = FAILED;
+ goto failed;
+ }
+
+ switch (conn->tmf_state) {
+ case TMF_SUCCESS:
spin_unlock_bh(&session->lock);
iscsi_suspend_tx(conn);
/*
write_lock_bh(conn->recv_lock);
spin_lock(&session->lock);
fail_command(conn, ctask, DID_ABORT << 16);
+ conn->tmf_state = TMF_INITIAL;
spin_unlock(&session->lock);
write_unlock_bh(conn->recv_lock);
iscsi_start_tx(conn);
goto success_unlocked;
- case TMABORT_NOT_FOUND:
- if (!ctask->sc) {
+ case TMF_TIMEDOUT:
+ spin_unlock_bh(&session->lock);
+ iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ goto failed_unlocked;
+ case TMF_NOT_FOUND:
+ if (!sc->SCp.ptr) {
+ conn->tmf_state = TMF_INITIAL;
/* ctask completed before tmf abort response */
debug_scsi("sc completed while abort in progress\n");
goto success;
}
/* fall through */
default:
- /* timedout or failed */
- spin_unlock_bh(&session->lock);
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
- goto failed_unlocked;
+ conn->tmf_state = TMF_INITIAL;
+ goto failed;
}
success:
failed:
spin_unlock_bh(&session->lock);
failed_unlocked:
- debug_scsi("abort failed [sc %lx itt 0x%x]\n", (long)sc, ctask->itt);
+ debug_scsi("abort failed [sc %p itt 0x%x]\n", sc,
+ ctask ? ctask->itt : 0);
mutex_unlock(&session->eh_mutex);
return FAILED;
}
EXPORT_SYMBOL_GPL(iscsi_eh_abort);
+static void iscsi_prep_lun_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr)
+{
+ memset(hdr, 0, sizeof(*hdr));
+ hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE;
+ hdr->flags = ISCSI_TM_FUNC_LOGICAL_UNIT_RESET & ISCSI_FLAG_TM_FUNC_MASK;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
+ hdr->rtt = ISCSI_RESERVED_TAG;
+}
+
+int iscsi_eh_device_reset(struct scsi_cmnd *sc)
+{
+ struct Scsi_Host *host = sc->device->host;
+ struct iscsi_session *session = iscsi_hostdata(host->hostdata);
+ struct iscsi_conn *conn;
+ struct iscsi_tm *hdr;
+ int rc = FAILED;
+
+ debug_scsi("LU Reset [sc %p lun %u]\n", sc, sc->device->lun);
+
+ mutex_lock(&session->eh_mutex);
+ spin_lock_bh(&session->lock);
+ /*
+ * Just check if we are not logged in. We cannot check for
+ * the phase because the reset could come from a ioctl.
+ */
+ if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN)
+ goto unlock;
+ conn = session->leadconn;
+
+ /* only have one tmf outstanding at a time */
+ if (conn->tmf_state != TMF_INITIAL)
+ goto unlock;
+ conn->tmf_state = TMF_QUEUED;
+
+ hdr = &conn->tmhdr;
+ iscsi_prep_lun_reset_pdu(sc, hdr);
+
+ if (iscsi_exec_task_mgmt_fn(conn, hdr, session->age)) {
+ rc = FAILED;
+ goto unlock;
+ }
+
+ switch (conn->tmf_state) {
+ case TMF_SUCCESS:
+ break;
+ case TMF_TIMEDOUT:
+ spin_unlock_bh(&session->lock);
+ iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ goto done;
+ default:
+ conn->tmf_state = TMF_INITIAL;
+ goto unlock;
+ }
+
+ rc = SUCCESS;
+ spin_unlock_bh(&session->lock);
+
+ iscsi_suspend_tx(conn);
+ /* need to grab the recv lock then session lock */
+ write_lock_bh(conn->recv_lock);
+ spin_lock(&session->lock);
+ fail_all_commands(conn, sc->device->lun);
+ conn->tmf_state = TMF_INITIAL;
+ spin_unlock(&session->lock);
+ write_unlock_bh(conn->recv_lock);
+
+ iscsi_start_tx(conn);
+ goto done;
+
+unlock:
+ spin_unlock_bh(&session->lock);
+done:
+ debug_scsi("iscsi_eh_device_reset %s\n",
+ rc == SUCCESS ? "SUCCESS" : "FAILED");
+ mutex_unlock(&session->eh_mutex);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(iscsi_eh_device_reset);
+
int
iscsi_pool_init(struct iscsi_queue *q, int max, void ***items, int item_size)
{
conn->c_stage = ISCSI_CONN_INITIAL_STAGE;
conn->id = conn_idx;
conn->exp_statsn = 0;
- conn->tmabort_state = TMABORT_INITIAL;
+ conn->tmf_state = TMF_INITIAL;
INIT_LIST_HEAD(&conn->run_list);
INIT_LIST_HEAD(&conn->mgmt_run_list);
+ INIT_LIST_HEAD(&conn->mgmtqueue);
INIT_LIST_HEAD(&conn->xmitqueue);
-
- /* initialize general immediate & non-immediate PDU commands queue */
- conn->mgmtqueue = kfifo_alloc(session->mgmtpool_max * sizeof(void*),
- GFP_KERNEL, NULL);
- if (conn->mgmtqueue == ERR_PTR(-ENOMEM))
- goto mgmtqueue_alloc_fail;
-
+ INIT_LIST_HEAD(&conn->requeue);
INIT_WORK(&conn->xmitwork, iscsi_xmitworker);
/* allocate login_mtask used for the login/text sequences */
goto login_mtask_data_alloc_fail;
conn->login_mtask->data = conn->data = data;
- init_timer(&conn->tmabort_timer);
+ init_timer(&conn->tmf_timer);
init_waitqueue_head(&conn->ehwait);
return cls_conn;
__kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
sizeof(void*));
login_mtask_alloc_fail:
- kfifo_free(conn->mgmtqueue);
-mgmtqueue_alloc_fail:
iscsi_destroy_conn(cls_conn);
return NULL;
}
unsigned long flags;
spin_lock_bh(&session->lock);
- set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
conn->c_stage = ISCSI_CONN_CLEANUP_WAIT;
if (session->leadconn == conn) {
/*
}
/* flush queued up work because we free the connection below */
- scsi_flush_work(session->host);
+ iscsi_suspend_tx(conn);
spin_lock_bh(&session->lock);
kfree(conn->data);
session->leadconn = NULL;
spin_unlock_bh(&session->lock);
- kfifo_free(conn->mgmtqueue);
-
iscsi_destroy_conn(cls_conn);
}
EXPORT_SYMBOL_GPL(iscsi_conn_teardown);
* commands after successful recovery
*/
conn->stop_stage = 0;
- conn->tmabort_state = TMABORT_INITIAL;
+ conn->tmf_state = TMF_INITIAL;
session->age++;
spin_unlock_bh(&session->lock);
struct iscsi_mgmt_task *mtask, *tmp;
/* handle pending */
- while (__kfifo_get(conn->mgmtqueue, (void*)&mtask, sizeof(void*))) {
+ list_for_each_entry_safe(mtask, tmp, &conn->mgmtqueue, running) {
+ debug_scsi("flushing pending mgmt task itt 0x%x\n", mtask->itt);
+ list_del_init(&mtask->running);
if (mtask == conn->login_mtask)
continue;
- debug_scsi("flushing pending mgmt task itt 0x%x\n", mtask->itt);
__kfifo_put(session->mgmtpool.queue, (void*)&mtask,
sizeof(void*));
}
/* handle running */
list_for_each_entry_safe(mtask, tmp, &conn->mgmt_run_list, running) {
debug_scsi("flushing running mgmt task itt 0x%x\n", mtask->itt);
- list_del(&mtask->running);
+ list_del_init(&mtask->running);
if (mtask == conn->login_mtask)
continue;
conn->mtask = NULL;
}
-/* Fail commands. Mutex and session lock held and recv side suspended */
-static void fail_all_commands(struct iscsi_conn *conn)
-{
- struct iscsi_cmd_task *ctask, *tmp;
-
- /* flush pending */
- list_for_each_entry_safe(ctask, tmp, &conn->xmitqueue, running) {
- debug_scsi("failing pending sc %p itt 0x%x\n", ctask->sc,
- ctask->itt);
- fail_command(conn, ctask, DID_BUS_BUSY << 16);
- }
-
- /* fail all other running */
- list_for_each_entry_safe(ctask, tmp, &conn->run_list, running) {
- debug_scsi("failing in progress sc %p itt 0x%x\n",
- ctask->sc, ctask->itt);
- fail_command(conn, ctask, DID_BUS_BUSY << 16);
- }
-
- conn->ctask = NULL;
-}
-
static void iscsi_start_session_recovery(struct iscsi_session *session,
struct iscsi_conn *conn, int flag)
{
* flush queues.
*/
spin_lock_bh(&session->lock);
- fail_all_commands(conn);
+ fail_all_commands(conn, -1);
flush_control_queues(session, conn);
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
uint32_t value;
switch(param) {
+ case ISCSI_PARAM_FAST_ABORT:
+ sscanf(buf, "%d", &session->fast_abort);
+ break;
case ISCSI_PARAM_MAX_RECV_DLENGTH:
sscanf(buf, "%d", &conn->max_recv_dlength);
break;
int len;
switch(param) {
+ case ISCSI_PARAM_FAST_ABORT:
+ len = sprintf(buf, "%d\n", session->fast_abort);
+ break;
case ISCSI_PARAM_INITIAL_R2T_EN:
len = sprintf(buf, "%d\n", session->initial_r2t_en);
break;
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blobdiff