kernel-fxtec-pro1x/drivers/target/iscsi/iscsi_target_tpg.h
Nicholas Bellinger d381a8010a iscsi-target: Add login negotiation multi-plexing support
This patch adds support for login negotiation multi-plexing in
iscsi-target code.

This involves handling the first login request PDU + payload and
login response PDU + payload within __iscsi_target_login_thread()
process context, and then changing struct sock->sk_data_ready()
so that all subsequent exchanges are handled by workqueue process
context, to allow other incoming login requests to be received
in parallel by __iscsi_target_login_thread().

Upon login negotiation completion (or failure), ->sk_data_ready()
is replaced with the original kernel sockets handler saved in
iscsi_conn->orig_data_ready.

v3 changes:
  - Convert iscsi_target_sk_data_ready() lock access to
    write[lock,unlock]_bh()
  - Only clear LOGIN_FLAGS_READ_ACTIVE when iscsi_target_do_login()
    returns zero
  - Add LOGIN_FLAGS_READY + LOGIN_FLAGS_CLOSED bit checks to
    iscsi_target_sk_data_ready()
  - Make INIT_DELAYED_WORK() + iscsi_target_set_sock_callbacks() setup
    happen earlier by moving from iscsi_target_start_negotiation() into
    iscsi_target_locate_portal()
  - Set LOGIN_FLAGS_READY bit in iscsi_target_start_negotiation()
    after iscsi_target_do_login() returns zero.

v2 changes:
  - Add login_timer in iscsi_target_do_login_rx() to avoid
    possible endless sleep with MSG_WAITALL for traditional
    iscsi-target in certain network configurations.
  - Convert lprintk() -> pr_debug()
  - Remove forward declarations of iscsi_target_set_sock_callbacks(),
    iscsi_target_restore_sock_callbacks() and iscsi_target_sk_data_ready()
  - Make iscsi_target_set_sock_callbacks + iscsi_target_restore_sock_callbacks()
    static (Fengguang)
  - Make iscsi_target_do_login_rx() safe for iser-target w/o conn->sock

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-09 14:13:31 -07:00

41 lines
2.4 KiB
C

#ifndef ISCSI_TARGET_TPG_H
#define ISCSI_TARGET_TPG_H
extern struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *, u16);
extern int iscsit_load_discovery_tpg(void);
extern void iscsit_release_discovery_tpg(void);
extern struct iscsi_portal_group *iscsit_get_tpg_from_np(struct iscsi_tiqn *,
struct iscsi_np *, struct iscsi_tpg_np **);
extern int iscsit_get_tpg(struct iscsi_portal_group *);
extern void iscsit_put_tpg(struct iscsi_portal_group *);
extern void iscsit_clear_tpg_np_login_threads(struct iscsi_portal_group *, bool);
extern void iscsit_tpg_dump_params(struct iscsi_portal_group *);
extern int iscsit_tpg_add_portal_group(struct iscsi_tiqn *, struct iscsi_portal_group *);
extern int iscsit_tpg_del_portal_group(struct iscsi_tiqn *, struct iscsi_portal_group *,
int);
extern int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *);
extern int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *, int);
extern struct iscsi_node_acl *iscsit_tpg_add_initiator_node_acl(
struct iscsi_portal_group *, const char *, u32);
extern void iscsit_tpg_del_initiator_node_acl(struct iscsi_portal_group *,
struct se_node_acl *);
extern struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(struct iscsi_session *);
extern void iscsit_tpg_del_external_nps(struct iscsi_tpg_np *);
extern struct iscsi_tpg_np *iscsit_tpg_locate_child_np(struct iscsi_tpg_np *, int);
extern struct iscsi_tpg_np *iscsit_tpg_add_network_portal(struct iscsi_portal_group *,
struct __kernel_sockaddr_storage *, char *, struct iscsi_tpg_np *,
int);
extern int iscsit_tpg_del_network_portal(struct iscsi_portal_group *,
struct iscsi_tpg_np *);
extern int iscsit_tpg_set_initiator_node_queue_depth(struct iscsi_portal_group *,
unsigned char *, u32, int);
extern int iscsit_ta_authentication(struct iscsi_portal_group *, u32);
extern int iscsit_ta_login_timeout(struct iscsi_portal_group *, u32);
extern int iscsit_ta_netif_timeout(struct iscsi_portal_group *, u32);
extern int iscsit_ta_generate_node_acls(struct iscsi_portal_group *, u32);
extern int iscsit_ta_default_cmdsn_depth(struct iscsi_portal_group *, u32);
extern int iscsit_ta_cache_dynamic_acls(struct iscsi_portal_group *, u32);
extern int iscsit_ta_demo_mode_write_protect(struct iscsi_portal_group *, u32);
extern int iscsit_ta_prod_mode_write_protect(struct iscsi_portal_group *, u32);
#endif /* ISCSI_TARGET_TPG_H */