aboutsummaryrefslogtreecommitdiff
path: root/include/target/iscsi
diff options
context:
space:
mode:
authorNicholas Bellinger <nab@linux-iscsi.org>2013-03-06 21:53:26 -0800
committerNicholas Bellinger <nab@linux-iscsi.org>2013-04-25 01:05:26 -0700
commit3f99306337ba1871afc8568e8b36004ce3cee039 (patch)
tree897b8e70ebcd2b3973e1657feefd7ba42bab88b3 /include/target/iscsi
parent20361e69ba0b52880f9a692bb80aceb989bf0e77 (diff)
downloadlinux-stericsson-3f99306337ba1871afc8568e8b36004ce3cee039.tar.gz
iscsi-target: Add iscsit_transport API template
Add basic struct iscsit_transport API template to allow iscsi-target for running with external transport modules using existing iscsi_target_core.h code. For all external modules, this calls try_module_get() and module_put() to obtain + release an external iscsit_transport module reference count. Also include the iscsi-target symbols necessary in iscsi_transport.h to allow external transport modules to function. v3 changes: - Add iscsit_build_reject export for ISTATE_SEND_REJECT usage v2 changes: - Drop unnecessary export of iscsit_get_transport + iscsit_put_transport (roland) - Add ->iscsit_queue_data_in() to remove extra context switch on RDMA_WRITE - Add ->iscsit_queue_status() to remove extra context switch on IB_SEND status - Add ->iscsit_get_dataout() to remove extra context switch on RDMA_READ - Drop ->iscsit_free_cmd() - Drop ->iscsit_unmap_cmd() - Rename iscsit_create_transport() -> iscsit_register_transport() (andy) - Rename iscsit_destroy_transport() -> iscsit_unregister_transport() (andy) Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include/target/iscsi')
-rw-r--r--include/target/iscsi/iscsi_transport.h83
1 files changed, 83 insertions, 0 deletions
diff --git a/include/target/iscsi/iscsi_transport.h b/include/target/iscsi/iscsi_transport.h
new file mode 100644
index 000000000000..23a87d0cd72c
--- /dev/null
+++ b/include/target/iscsi/iscsi_transport.h
@@ -0,0 +1,83 @@
+#include <linux/module.h>
+#include <linux/list.h>
+#include "../../../drivers/target/iscsi/iscsi_target_core.h"
+
+struct iscsit_transport {
+#define ISCSIT_TRANSPORT_NAME 16
+ char name[ISCSIT_TRANSPORT_NAME];
+ int transport_type;
+ struct module *owner;
+ struct list_head t_node;
+ int (*iscsit_setup_np)(struct iscsi_np *, struct __kernel_sockaddr_storage *);
+ int (*iscsit_accept_np)(struct iscsi_np *, struct iscsi_conn *);
+ void (*iscsit_free_np)(struct iscsi_np *);
+ void (*iscsit_free_conn)(struct iscsi_conn *);
+ struct iscsi_cmd *(*iscsit_alloc_cmd)(struct iscsi_conn *, gfp_t);
+ int (*iscsit_get_login_rx)(struct iscsi_conn *, struct iscsi_login *);
+ int (*iscsit_put_login_tx)(struct iscsi_conn *, struct iscsi_login *, u32);
+ int (*iscsit_immediate_queue)(struct iscsi_conn *, struct iscsi_cmd *, int);
+ int (*iscsit_response_queue)(struct iscsi_conn *, struct iscsi_cmd *, int);
+ int (*iscsit_get_dataout)(struct iscsi_conn *, struct iscsi_cmd *, bool);
+ int (*iscsit_queue_data_in)(struct iscsi_conn *, struct iscsi_cmd *);
+ int (*iscsit_queue_status)(struct iscsi_conn *, struct iscsi_cmd *);
+};
+
+/*
+ * From iscsi_target_transport.c
+ */
+
+extern int iscsit_register_transport(struct iscsit_transport *);
+extern void iscsit_unregister_transport(struct iscsit_transport *);
+extern struct iscsit_transport *iscsit_get_transport(int);
+extern void iscsit_put_transport(struct iscsit_transport *);
+
+/*
+ * From iscsi_target.c
+ */
+extern int iscsit_add_reject_from_cmd(u8, int, int, unsigned char *,
+ struct iscsi_cmd *);
+extern int iscsit_setup_scsi_cmd(struct iscsi_conn *, struct iscsi_cmd *,
+ unsigned char *);
+extern void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *);
+extern int iscsit_process_scsi_cmd(struct iscsi_conn *, struct iscsi_cmd *,
+ struct iscsi_scsi_req *);
+extern int iscsit_check_dataout_hdr(struct iscsi_conn *, unsigned char *,
+ struct iscsi_cmd **);
+extern int iscsit_check_dataout_payload(struct iscsi_cmd *, struct iscsi_data *,
+ bool);
+extern int iscsit_handle_nop_out(struct iscsi_conn *, struct iscsi_cmd *,
+ unsigned char *);
+extern int iscsit_handle_logout_cmd(struct iscsi_conn *, struct iscsi_cmd *,
+ unsigned char *);
+extern int iscsit_handle_task_mgt_cmd(struct iscsi_conn *, struct iscsi_cmd *,
+ unsigned char *);
+extern void iscsit_build_rsp_pdu(struct iscsi_cmd *, struct iscsi_conn *,
+ bool, struct iscsi_scsi_rsp *);
+extern void iscsit_build_nopin_rsp(struct iscsi_cmd *, struct iscsi_conn *,
+ struct iscsi_nopin *, bool);
+extern void iscsit_build_task_mgt_rsp(struct iscsi_cmd *, struct iscsi_conn *,
+ struct iscsi_tm_rsp *);
+extern void iscsit_build_reject(struct iscsi_cmd *, struct iscsi_conn *,
+ struct iscsi_reject *);
+extern int iscsit_build_logout_rsp(struct iscsi_cmd *, struct iscsi_conn *,
+ struct iscsi_logout_rsp *);
+extern int iscsit_logout_post_handler(struct iscsi_cmd *, struct iscsi_conn *);
+/*
+ * From iscsi_target_device.c
+ */
+extern void iscsit_increment_maxcmdsn(struct iscsi_cmd *, struct iscsi_session *);
+/*
+ * From iscsi_target_erl1.c
+ */
+extern void iscsit_stop_dataout_timer(struct iscsi_cmd *);
+
+/*
+ * From iscsi_target_tmr.c
+ */
+extern int iscsit_tmr_post_handler(struct iscsi_cmd *, struct iscsi_conn *);
+
+/*
+ * From iscsi_target_util.c
+ */
+extern struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *, gfp_t);
+extern int iscsit_sequence_cmd(struct iscsi_conn *, struct iscsi_cmd *, __be32);