+/** \defgroup lnet_init_fini Initialization and cleanup
+ * The LNet must be properly initialized before any LNet calls can be made.
+ * @{ */
+int LNetNIInit(lnet_pid_t requested_pid);
+int LNetNIFini(void);
+/** @} lnet_init_fini */
+
+/** \defgroup lnet_addr LNet addressing and basic types
+ *
+ * Addressing scheme and basic data types of LNet.
+ *
+ * The LNet API is memory-oriented, so LNet must be able to address not only
+ * end-points but also memory region within a process address space.
+ * An ::lnet_nid_t addresses an end-point. An ::lnet_pid_t identifies a process
+ * in a node. A portal represents an opening in the address space of a
+ * process. Match bits is criteria to identify a region of memory inside a
+ * portal, and offset specifies an offset within the memory region.
+ *
+ * LNet creates a table of portals for each process during initialization.
+ * This table has MAX_PORTALS entries and its size can't be dynamically
+ * changed. A portal stays empty until the owning process starts to add
+ * memory regions to it. A portal is sometimes called an index because
+ * it's an entry in the portals table of a process.
+ *
+ * \see LNetMEAttach
+ * @{ */
+int LNetGetId(unsigned int index, struct lnet_process_id *id);
+int LNetDist(lnet_nid_t nid, lnet_nid_t *srcnid, __u32 *order);
+lnet_nid_t LNetPrimaryNID(lnet_nid_t nid);
+bool LNetIsPeerLocal(lnet_nid_t nid);
+
+/** @} lnet_addr */
+
+
+/** \defgroup lnet_me Match entries
+ *
+ * A match entry (abbreviated as ME) describes a set of criteria to accept
+ * incoming requests.
+ *
+ * A portal is essentially a match list plus a set of attributes. A match
+ * list is a chain of MEs. Each ME includes a pointer to a memory descriptor
+ * and a set of match criteria. The match criteria can be used to reject
+ * incoming requests based on process ID or the match bits provided in the
+ * request. MEs can be dynamically inserted into a match list by LNetMEAttach(),
+ * and must then be attached to an MD with LNetMDAttach().
+ * @{ */
+struct lnet_me *
+LNetMEAttach(unsigned int portal,
+ struct lnet_process_id match_id_in,
+ __u64 match_bits_in,
+ __u64 ignore_bits_in,
+ enum lnet_unlink unlink_in,
+ enum lnet_ins_pos pos_in);
+/** @} lnet_me */
+
+/** \defgroup lnet_md Memory descriptors
+ *
+ * A memory descriptor contains information about a region of a user's
+ * memory (either in kernel or user space) and optionally points to an
+ * event queue where information about the operations performed on the
+ * memory descriptor are recorded. Memory descriptor is abbreviated as
+ * MD and can be used interchangeably with the memory region it describes.
+ *
+ * The LNet API provides two operations to create MDs: LNetMDAttach()
+ * and LNetMDBind(); one operation to unlink and release the resources
+ * associated with a MD: LNetMDUnlink().
+ * @{ */
+int LNetMDAttach(struct lnet_me *current_in,
+ const struct lnet_md *md_in,
+ enum lnet_unlink unlink_in,
+ struct lnet_handle_md *md_handle_out);
+
+int LNetMDBind(const struct lnet_md *md_in,
+ enum lnet_unlink unlink_in,
+ struct lnet_handle_md *md_handle_out);
+
+int __LNetMDUnlink(struct lnet_handle_md md_in, bool discard);
+#define LNetMDUnlink(handle) __LNetMDUnlink(handle, false)
+
+void lnet_assert_handler_unused(lnet_handler_t handler);
+/** @} lnet_md */
+
+/** \defgroup lnet_data Data movement operations
+ *
+ * The LNet API provides two data movement operations: LNetPut()
+ * and LNetGet().
+ * @{ */
+int LNetPut(lnet_nid_t self,
+ struct lnet_handle_md md_in,
+ enum lnet_ack_req ack_req_in,
+ struct lnet_process_id target_in,