diff options
Diffstat (limited to 'drivers/target/iscsi/iscsi_target_tq.h')
| -rw-r--r-- | drivers/target/iscsi/iscsi_target_tq.h | 88 |
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 ***/ |