1#ifndef ISCSI_THREAD_QUEUE_H
2#define ISCSI_THREAD_QUEUE_H
3
4/*
5 * Defines for thread sets.
6 */
7extern int iscsi_thread_set_force_reinstatement(struct iscsi_conn *);
8extern void iscsi_add_ts_to_inactive_list(struct iscsi_thread_set *);
9extern int iscsi_allocate_thread_sets(u32);
10extern void iscsi_deallocate_thread_sets(void);
11extern void iscsi_activate_thread_set(struct iscsi_conn *, struct iscsi_thread_set *);
12extern struct iscsi_thread_set *iscsi_get_thread_set(void);
13extern void iscsi_set_thread_clear(struct iscsi_conn *, u8);
14extern void iscsi_set_thread_set_signal(struct iscsi_conn *, u8);
15extern int iscsi_release_thread_set(struct iscsi_conn *);
16extern struct iscsi_conn *iscsi_rx_thread_pre_handler(struct iscsi_thread_set *);
17extern struct iscsi_conn *iscsi_tx_thread_pre_handler(struct iscsi_thread_set *);
18extern int iscsi_thread_set_init(void);
19extern void iscsi_thread_set_free(void);
20
21extern int iscsi_target_tx_thread(void *);
22extern int iscsi_target_rx_thread(void *);
23
24#define TARGET_THREAD_SET_COUNT			4
25
26#define ISCSI_RX_THREAD                         1
27#define ISCSI_TX_THREAD                         2
28#define ISCSI_RX_THREAD_NAME			"iscsi_trx"
29#define ISCSI_TX_THREAD_NAME			"iscsi_ttx"
30#define ISCSI_BLOCK_RX_THREAD			0x1
31#define ISCSI_BLOCK_TX_THREAD			0x2
32#define ISCSI_CLEAR_RX_THREAD			0x1
33#define ISCSI_CLEAR_TX_THREAD			0x2
34#define ISCSI_SIGNAL_RX_THREAD			0x1
35#define ISCSI_SIGNAL_TX_THREAD			0x2
36
37/* struct iscsi_thread_set->status */
38#define ISCSI_THREAD_SET_FREE			1
39#define ISCSI_THREAD_SET_ACTIVE			2
40#define ISCSI_THREAD_SET_DIE			3
41#define ISCSI_THREAD_SET_RESET			4
42#define ISCSI_THREAD_SET_DEALLOCATE_THREADS	5
43
44/* By default allow a maximum of 32K iSCSI connections */
45#define ISCSI_TS_BITMAP_BITS			32768
46
47struct iscsi_thread_set {
48	/* flags used for blocking and restarting sets */
49	int	blocked_threads;
50	/* flag for creating threads */
51	int	create_threads;
52	/* flag for delaying readding to inactive list */
53	int	delay_inactive;
54	/* status for thread set */
55	int	status;
56	/* which threads have had signals sent */
57	int	signal_sent;
58	/* flag for which threads exited first */
59	int	thread_clear;
60	/* Active threads in the thread set */
61	int	thread_count;
62	/* Unique thread ID */
63	u32	thread_id;
64	/* pointer to connection if set is active */
65	struct iscsi_conn	*conn;
66	/* used for controlling ts state accesses */
67	spinlock_t	ts_state_lock;
68	/* Used for rx side post startup */
69	struct completion	rx_post_start_comp;
70	/* Used for tx side post startup */
71	struct completion	tx_post_start_comp;
72	/* used for restarting thread queue */
73	struct completion	rx_restart_comp;
74	/* used for restarting thread queue */
75	struct completion	tx_restart_comp;
76	/* used for normal unused blocking */
77	struct completion	rx_start_comp;
78	/* used for normal unused blocking */
79	struct completion	tx_start_comp;
80	/* OS descriptor for rx thread */
81	struct task_struct	*rx_thread;
82	/* OS descriptor for tx thread */
83	struct task_struct	*tx_thread;
84	/* struct iscsi_thread_set in list list head*/
85	struct list_head	ts_list;
86};
87
88#endif   /*** ISCSI_THREAD_QUEUE_H ***/
89