mirror of
https://github.com/adulau/aha.git
synced 2024-12-30 12:46:17 +00:00
2c47f9efbe
tgt uses scsi_host as I_T nexus. This works for ibmvstgt because it creates one scsi_host for one initiator. However, other target drivers don't work like that. This adds I_T nexus support, which enable one scsi_host to handle multiple initiators. New scsi_tgt_it_nexus_create/destroy functions are expected be called transport classes. For example, ibmvstgt creates an initiator remote port, then the srp transport calls tgt_it_nexus_create. tgt doesn't manages I_T nexus, instead it tells tgtd, user-space daemon, to create a new I_T nexus. On the receiving the response from tgtd, tgt calls shost->transportt->it_nexus_response. transports should notify a lld. The srp transport uses it_nexus_response callback in srp_function_template to do that. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
32 lines
1.2 KiB
C
32 lines
1.2 KiB
C
struct scsi_cmnd;
|
|
struct scsi_lun;
|
|
struct Scsi_Host;
|
|
struct task_struct;
|
|
|
|
/* tmp - will replace with SCSI logging stuff */
|
|
#define eprintk(fmt, args...) \
|
|
do { \
|
|
printk("%s(%d) " fmt, __FUNCTION__, __LINE__, ##args); \
|
|
} while (0)
|
|
|
|
#define dprintk(fmt, args...)
|
|
/* #define dprintk eprintk */
|
|
|
|
extern void scsi_tgt_if_exit(void);
|
|
extern int scsi_tgt_if_init(void);
|
|
|
|
extern int scsi_tgt_uspace_send_cmd(struct scsi_cmnd *cmd, u64 it_nexus_id,
|
|
struct scsi_lun *lun, u64 tag);
|
|
extern int scsi_tgt_uspace_send_status(struct scsi_cmnd *cmd, u64 it_nexus_id,
|
|
u64 tag);
|
|
extern int scsi_tgt_kspace_exec(int host_no, u64 it_nexus_id, int result, u64 tag,
|
|
unsigned long uaddr, u32 len,
|
|
unsigned long sense_uaddr, u32 sense_len, u8 rw);
|
|
extern int scsi_tgt_uspace_send_tsk_mgmt(int host_no, u64 it_nexus_id,
|
|
int function, u64 tag,
|
|
struct scsi_lun *scsilun, void *data);
|
|
extern int scsi_tgt_kspace_tsk_mgmt(int host_no, u64 it_nexus_id,
|
|
u64 mid, int result);
|
|
extern int scsi_tgt_uspace_send_it_nexus_request(int host_no, u64 it_nexus_id,
|
|
int function, char *initiator);
|
|
extern int scsi_tgt_kspace_it_nexus_rsp(int host_no, u64 it_nexus_id, int result);
|