iscsi-target: Add iSCSI fabric support for target v4.1

The Linux-iSCSI.org target module is a full featured in-kernel
software implementation of iSCSI target mode (RFC-3720) for the
current WIP mainline target v4.1 infrastructure code for the v3.1
kernel.  More information can be found here:

http://linux-iscsi.org/wiki/ISCSI

This includes support for:

   * RFC-3720 defined request / response state machines and support for
     all defined iSCSI operation codes from Section 10.2.1.2 using libiscsi
     include/scsi/iscsi_proto.h PDU definitions
   * Target v4.1 compatible control plane using the generic layout in
     target_core_fabric_configfs.c and fabric dependent attributes
     within /sys/kernel/config/target/iscsi/ subdirectories.
   * Target v4.1 compatible iSCSI statistics based on RFC-4544 (iSCSI MIBS)
   * Support for IPv6 and IPv4 network portals in M:N mapping to TPGs
   * iSCSI Error Recovery Hierarchy support
   * Per iSCSI connection RX/TX thread pair scheduling affinity
   * crc32c + crc32c_intel SSEv4 instruction offload support using libcrypto
   * CHAP Authentication support using libcrypto
   * Conversion to use internal SGl allocation with iscsit_alloc_buffs() ->
     transport_generic_map_mem_to_cmd()

(nab: Fix iscsi_proto.h struct scsi_lun usage from linux-next in commit:
      iscsi: Use struct scsi_lun in iscsi structs instead of u8[8])
(nab: Fix 32-bit compile warnings)

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andy Grover <agrover@redhat.com>
Acked-by: Roland Dreier <roland@kernel.org>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/target/iscsi/iscsi_target.h b/drivers/target/iscsi/iscsi_target.h
new file mode 100644
index 000000000000..5db2ddeed5eb
--- /dev/null
+++ b/drivers/target/iscsi/iscsi_target.h
@@ -0,0 +1,42 @@
+#ifndef ISCSI_TARGET_H
+#define ISCSI_TARGET_H
+
+extern struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *);
+extern struct iscsi_tiqn *iscsit_get_tiqn(unsigned char *, int);
+extern void iscsit_put_tiqn_for_login(struct iscsi_tiqn *);
+extern struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *);
+extern void iscsit_del_tiqn(struct iscsi_tiqn *);
+extern int iscsit_access_np(struct iscsi_np *, struct iscsi_portal_group *);
+extern int iscsit_deaccess_np(struct iscsi_np *, struct iscsi_portal_group *);
+extern struct iscsi_np *iscsit_add_np(struct __kernel_sockaddr_storage *,
+				char *, int);
+extern int iscsit_reset_np_thread(struct iscsi_np *, struct iscsi_tpg_np *,
+				struct iscsi_portal_group *);
+extern int iscsit_del_np(struct iscsi_np *);
+extern int iscsit_add_reject_from_cmd(u8, int, int, unsigned char *, struct iscsi_cmd *);
+extern int iscsit_logout_closesession(struct iscsi_cmd *, struct iscsi_conn *);
+extern int iscsit_logout_closeconnection(struct iscsi_cmd *, struct iscsi_conn *);
+extern int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *, struct iscsi_conn *);
+extern int iscsit_send_async_msg(struct iscsi_conn *, u16, u8, u8);
+extern int iscsit_send_r2t(struct iscsi_cmd *, struct iscsi_conn *);
+extern int iscsit_build_r2ts_for_cmd(struct iscsi_cmd *, struct iscsi_conn *, int);
+extern void iscsit_thread_get_cpumask(struct iscsi_conn *);
+extern int iscsi_target_tx_thread(void *);
+extern int iscsi_target_rx_thread(void *);
+extern int iscsit_close_connection(struct iscsi_conn *);
+extern int iscsit_close_session(struct iscsi_session *);
+extern void iscsit_fail_session(struct iscsi_session *);
+extern int iscsit_free_session(struct iscsi_session *);
+extern void iscsit_stop_session(struct iscsi_session *, int, int);
+extern int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *, int);
+
+extern struct iscsit_global *iscsit_global;
+extern struct target_fabric_configfs *lio_target_fabric_configfs;
+
+extern struct kmem_cache *lio_dr_cache;
+extern struct kmem_cache *lio_ooo_cache;
+extern struct kmem_cache *lio_cmd_cache;
+extern struct kmem_cache *lio_qr_cache;
+extern struct kmem_cache *lio_r2t_cache;
+
+#endif   /*** ISCSI_TARGET_H ***/