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path: root/drivers/target/iscsi/iscsi_target_tq.h
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Diffstat (limited to 'drivers/target/iscsi/iscsi_target_tq.h')
-rw-r--r--drivers/target/iscsi/iscsi_target_tq.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/drivers/target/iscsi/iscsi_target_tq.h b/drivers/target/iscsi/iscsi_target_tq.h
new file mode 100644
index 000000000000..26e6a95ec203
--- /dev/null
+++ b/drivers/target/iscsi/iscsi_target_tq.h
@@ -0,0 +1,88 @@
+#ifndef ISCSI_THREAD_QUEUE_H
+#define ISCSI_THREAD_QUEUE_H
+
+/*
+ * Defines for thread sets.
+ */
+extern int iscsi_thread_set_force_reinstatement(struct iscsi_conn *);
+extern void iscsi_add_ts_to_inactive_list(struct iscsi_thread_set *);
+extern int iscsi_allocate_thread_sets(u32);
+extern void iscsi_deallocate_thread_sets(void);
+extern void iscsi_activate_thread_set(struct iscsi_conn *, struct iscsi_thread_set *);
+extern struct iscsi_thread_set *iscsi_get_thread_set(void);
+extern void iscsi_set_thread_clear(struct iscsi_conn *, u8);
+extern void iscsi_set_thread_set_signal(struct iscsi_conn *, u8);
+extern int iscsi_release_thread_set(struct iscsi_conn *);
+extern struct iscsi_conn *iscsi_rx_thread_pre_handler(struct iscsi_thread_set *);
+extern struct iscsi_conn *iscsi_tx_thread_pre_handler(struct iscsi_thread_set *);
+extern int iscsi_thread_set_init(void);
+extern void iscsi_thread_set_free(void);
+
+extern int iscsi_target_tx_thread(void *);
+extern int iscsi_target_rx_thread(void *);
+
+#define TARGET_THREAD_SET_COUNT 4
+
+#define ISCSI_RX_THREAD 1
+#define ISCSI_TX_THREAD 2
+#define ISCSI_RX_THREAD_NAME "iscsi_trx"
+#define ISCSI_TX_THREAD_NAME "iscsi_ttx"
+#define ISCSI_BLOCK_RX_THREAD 0x1
+#define ISCSI_BLOCK_TX_THREAD 0x2
+#define ISCSI_CLEAR_RX_THREAD 0x1
+#define ISCSI_CLEAR_TX_THREAD 0x2
+#define ISCSI_SIGNAL_RX_THREAD 0x1
+#define ISCSI_SIGNAL_TX_THREAD 0x2
+
+/* struct iscsi_thread_set->status */
+#define ISCSI_THREAD_SET_FREE 1
+#define ISCSI_THREAD_SET_ACTIVE 2
+#define ISCSI_THREAD_SET_DIE 3
+#define ISCSI_THREAD_SET_RESET 4
+#define ISCSI_THREAD_SET_DEALLOCATE_THREADS 5
+
+/* By default allow a maximum of 32K iSCSI connections */
+#define ISCSI_TS_BITMAP_BITS 32768
+
+struct iscsi_thread_set {
+ /* flags used for blocking and restarting sets */
+ int blocked_threads;
+ /* flag for creating threads */
+ int create_threads;
+ /* flag for delaying readding to inactive list */
+ int delay_inactive;
+ /* status for thread set */
+ int status;
+ /* which threads have had signals sent */
+ int signal_sent;
+ /* flag for which threads exited first */
+ int thread_clear;
+ /* Active threads in the thread set */
+ int thread_count;
+ /* Unique thread ID */
+ u32 thread_id;
+ /* pointer to connection if set is active */
+ struct iscsi_conn *conn;
+ /* used for controlling ts state accesses */
+ spinlock_t ts_state_lock;
+ /* Used for rx side post startup */
+ struct completion rx_post_start_comp;
+ /* Used for tx side post startup */
+ struct completion tx_post_start_comp;
+ /* used for restarting thread queue */
+ struct completion rx_restart_comp;
+ /* used for restarting thread queue */
+ struct completion tx_restart_comp;
+ /* used for normal unused blocking */
+ struct completion rx_start_comp;
+ /* used for normal unused blocking */
+ struct completion tx_start_comp;
+ /* OS descriptor for rx thread */
+ struct task_struct *rx_thread;
+ /* OS descriptor for tx thread */
+ struct task_struct *tx_thread;
+ /* struct iscsi_thread_set in list list head*/
+ struct list_head ts_list;
+};
+
+#endif /*** ISCSI_THREAD_QUEUE_H ***/