ts->status = ISCSI_THREAD_SET_FREE;
INIT_LIST_HEAD(&ts->ts_list);
spin_lock_init(&ts->ts_state_lock);
- init_completion(&ts->rx_post_start_comp);
- init_completion(&ts->tx_post_start_comp);
init_completion(&ts->rx_restart_comp);
init_completion(&ts->tx_restart_comp);
init_completion(&ts->rx_start_comp);
init_completion(&ts->tx_start_comp);
+ sema_init(&ts->ts_activate_sem, 0);
ts->create_threads = 1;
ts->tx_thread = kthread_run(iscsi_target_tx_thread, ts, "%s",
return allocated_thread_pair_count;
}
-void iscsi_deallocate_thread_sets(void)
+static void iscsi_deallocate_thread_one(struct iscsi_thread_set *ts)
{
- u32 released_count = 0;
- struct iscsi_thread_set *ts = NULL;
-
- while ((ts = iscsi_get_ts_from_inactive_list())) {
+ spin_lock_bh(&ts->ts_state_lock);
+ ts->status = ISCSI_THREAD_SET_DIE;
+ if (ts->rx_thread) {
+ complete(&ts->rx_start_comp);
+ spin_unlock_bh(&ts->ts_state_lock);
+ kthread_stop(ts->rx_thread);
spin_lock_bh(&ts->ts_state_lock);
- ts->status = ISCSI_THREAD_SET_DIE;
+ }
+ if (ts->tx_thread) {
+ complete(&ts->tx_start_comp);
spin_unlock_bh(&ts->ts_state_lock);
+ kthread_stop(ts->tx_thread);
+ spin_lock_bh(&ts->ts_state_lock);
+ }
+ spin_unlock_bh(&ts->ts_state_lock);
+ /*
+ * Release this thread_id in the thread_set_bitmap
+ */
+ spin_lock(&ts_bitmap_lock);
+ bitmap_release_region(iscsit_global->ts_bitmap,
+ ts->thread_id, get_order(1));
+ spin_unlock(&ts_bitmap_lock);
- if (ts->rx_thread) {
- send_sig(SIGINT, ts->rx_thread, 1);
- kthread_stop(ts->rx_thread);
- }
- if (ts->tx_thread) {
- send_sig(SIGINT, ts->tx_thread, 1);
- kthread_stop(ts->tx_thread);
- }
- /*
- * Release this thread_id in the thread_set_bitmap
- */
- spin_lock(&ts_bitmap_lock);
- bitmap_release_region(iscsit_global->ts_bitmap,
- ts->thread_id, get_order(1));
- spin_unlock(&ts_bitmap_lock);
+ kfree(ts);
+}
+
+void iscsi_deallocate_thread_sets(void)
+{
+ struct iscsi_thread_set *ts = NULL;
+ u32 released_count = 0;
+ while ((ts = iscsi_get_ts_from_inactive_list())) {
+
+ iscsi_deallocate_thread_one(ts);
released_count++;
- kfree(ts);
}
if (released_count)
if (!ts)
break;
- spin_lock_bh(&ts->ts_state_lock);
- ts->status = ISCSI_THREAD_SET_DIE;
-
- if (ts->rx_thread) {
- complete(&ts->rx_start_comp);
- spin_unlock_bh(&ts->ts_state_lock);
- kthread_stop(ts->rx_thread);
- spin_lock_bh(&ts->ts_state_lock);
- }
- if (ts->tx_thread) {
- complete(&ts->tx_start_comp);
- spin_unlock_bh(&ts->ts_state_lock);
- kthread_stop(ts->tx_thread);
- spin_lock_bh(&ts->ts_state_lock);
- }
- spin_unlock_bh(&ts->ts_state_lock);
- /*
- * Release this thread_id in the thread_set_bitmap
- */
- spin_lock(&ts_bitmap_lock);
- bitmap_release_region(iscsit_global->ts_bitmap,
- ts->thread_id, get_order(1));
- spin_unlock(&ts_bitmap_lock);
-
+ iscsi_deallocate_thread_one(ts);
released_count++;
- kfree(ts);
}
- if (released_count) {
+ if (released_count)
pr_debug("Stopped %d thread set(s) (%d total threads)."
"\n", released_count, released_count * 2);
- }
}
void iscsi_activate_thread_set(struct iscsi_conn *conn, struct iscsi_thread_set *ts)
spin_lock_bh(&ts->ts_state_lock);
conn->thread_set = ts;
ts->conn = conn;
+ ts->status = ISCSI_THREAD_SET_ACTIVE;
spin_unlock_bh(&ts->ts_state_lock);
- /*
- * Start up the RX thread and wait on rx_post_start_comp. The RX
- * Thread will then do the same for the TX Thread in
- * iscsi_rx_thread_pre_handler().
- */
+
complete(&ts->rx_start_comp);
- wait_for_completion(&ts->rx_post_start_comp);
+ complete(&ts->tx_start_comp);
+
+ down(&ts->ts_activate_sem);
}
struct iscsi_thread_set *iscsi_get_thread_set(void)
ts->thread_count = 2;
init_completion(&ts->rx_restart_comp);
init_completion(&ts->tx_restart_comp);
+ sema_init(&ts->ts_activate_sem, 0);
return ts;
}
if (iscsi_signal_thread_pre_handler(ts) < 0)
return NULL;
+ iscsi_check_to_add_additional_sets();
+
+ spin_lock_bh(&ts->ts_state_lock);
if (!ts->conn) {
pr_err("struct iscsi_thread_set->conn is NULL for"
- " thread_id: %d, going back to sleep\n", ts->thread_id);
- goto sleep;
+ " RX thread_id: %s/%d\n", current->comm, current->pid);
+ spin_unlock_bh(&ts->ts_state_lock);
+ return NULL;
}
- iscsi_check_to_add_additional_sets();
- /*
- * The RX Thread starts up the TX Thread and sleeps.
- */
ts->thread_clear |= ISCSI_CLEAR_RX_THREAD;
- complete(&ts->tx_start_comp);
- wait_for_completion(&ts->tx_post_start_comp);
+ spin_unlock_bh(&ts->ts_state_lock);
+
+ up(&ts->ts_activate_sem);
return ts->conn;
}
if (iscsi_signal_thread_pre_handler(ts) < 0)
return NULL;
- if (!ts->conn) {
- pr_err("struct iscsi_thread_set->conn is NULL for "
- " thread_id: %d, going back to sleep\n",
- ts->thread_id);
- goto sleep;
- }
-
iscsi_check_to_add_additional_sets();
- /*
- * From the TX thread, up the tx_post_start_comp that the RX Thread is
- * sleeping on in iscsi_rx_thread_pre_handler(), then up the
- * rx_post_start_comp that iscsi_activate_thread_set() is sleeping on.
- */
- ts->thread_clear |= ISCSI_CLEAR_TX_THREAD;
- complete(&ts->tx_post_start_comp);
- complete(&ts->rx_post_start_comp);
spin_lock_bh(&ts->ts_state_lock);
- ts->status = ISCSI_THREAD_SET_ACTIVE;
+ if (!ts->conn) {
+ pr_err("struct iscsi_thread_set->conn is NULL for"
+ " TX thread_id: %s/%d\n", current->comm, current->pid);
+ spin_unlock_bh(&ts->ts_state_lock);
+ return NULL;
+ }
+ ts->thread_clear |= ISCSI_CLEAR_TX_THREAD;
spin_unlock_bh(&ts->ts_state_lock);
+ up(&ts->ts_activate_sem);
+
return ts->conn;
}