1 #ifndef ISCSI_THREAD_QUEUE_H
2 #define ISCSI_THREAD_QUEUE_H
5 * Defines for thread sets.
7 extern int iscsi_thread_set_force_reinstatement(struct iscsi_conn *);
8 extern void iscsi_add_ts_to_inactive_list(struct iscsi_thread_set *);
9 extern int iscsi_allocate_thread_sets(u32);
10 extern void iscsi_deallocate_thread_sets(void);
11 extern void iscsi_activate_thread_set(struct iscsi_conn *, struct iscsi_thread_set *);
12 extern struct iscsi_thread_set *iscsi_get_thread_set(void);
13 extern void iscsi_set_thread_clear(struct iscsi_conn *, u8);
14 extern void iscsi_set_thread_set_signal(struct iscsi_conn *, u8);
15 extern int iscsi_release_thread_set(struct iscsi_conn *);
16 extern struct iscsi_conn *iscsi_rx_thread_pre_handler(struct iscsi_thread_set *);
17 extern struct iscsi_conn *iscsi_tx_thread_pre_handler(struct iscsi_thread_set *);
18 extern int iscsi_thread_set_init(void);
19 extern void iscsi_thread_set_free(void);
21 extern int iscsi_target_tx_thread(void *);
22 extern int iscsi_target_rx_thread(void *);
24 #define TARGET_THREAD_SET_COUNT 4
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
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
44 /* By default allow a maximum of 32K iSCSI connections */
45 #define ISCSI_TS_BITMAP_BITS 32768
47 struct iscsi_thread_set {
48 /* flags used for blocking and restarting sets */
50 /* flag for creating threads */
52 /* flag for delaying readding to inactive list */
54 /* status for thread set */
56 /* which threads have had signals sent */
58 /* flag for which threads exited first */
60 /* Active threads in the thread set */
62 /* Unique 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;
88 #endif /*** ISCSI_THREAD_QUEUE_H ***/