#define DEBUG_SUBSYSTEM S_RPC
#include <linux/obd_support.h>
+#include <linux/obd_class.h>
#include <linux/lustre_net.h>
-static ptl_handle_eq_t sent_pkt_eq, rcvd_rep_eq,
- bulk_source_eq, bulk_sink_eq;
+extern int ptlrpc_init_portals(void);
+extern void ptlrpc_exit_portals(void);
-struct ptlrpc_request *ptlrpc_prep_req(struct ptlrpc_client *cl,
- int opcode, int namelen, char *name,
- int tgtlen, char *tgt)
-{
- struct ptlrpc_request *request;
- int rc;
- ENTRY;
-
- OBD_ALLOC(request, sizeof(*request));
- if (!request) {
- CERROR("request allocation out of memory\n");
- return NULL;
- }
-
- memset(request, 0, sizeof(*request));
- request->rq_xid = cl->cli_xid++;
-
- rc = cl->cli_req_pack(name, namelen, tgt, tgtlen,
- &request->rq_reqhdr, &request->rq_req,
- &request->rq_reqlen, &request->rq_reqbuf);
- if (rc) {
- CERROR("cannot pack request %d\n", rc);
- return NULL;
- }
- request->rq_reqhdr->opc = opcode;
- request->rq_reqhdr->seqno = request->rq_xid;
-
- EXIT;
- return request;
-}
-
-void ptlrpc_free_req(struct ptlrpc_request *request)
-{
- OBD_FREE(request, sizeof(*request));
-}
-
-/* Abort this request and cleanup any resources associated with it. */
-int ptl_abort_rpc(struct ptlrpc_request *request)
-{
- /* First remove the MD for the reply; in theory, this means
- * that we can tear down the buffer safely. */
- PtlMEUnlink(request->rq_reply_me_h);
- PtlMDUnlink(request->rq_reply_md_h);
-
- if (request->rq_bulklen != 0) {
- PtlMEUnlink(request->rq_bulk_me_h);
- PtlMDUnlink(request->rq_bulk_md_h);
- }
-
- return 0;
-}
-
-int ptlrpc_queue_wait(struct ptlrpc_request *req, struct ptlrpc_client *cl)
-{
- int rc;
- DECLARE_WAITQUEUE(wait, current);
-
- init_waitqueue_head(&req->rq_wait_for_rep);
-
- if (cl->cli_enqueue) {
- /* Local delivery */
- ENTRY;
- rc = cl->cli_enqueue(req);
- } else {
- /* Remote delivery via portals. */
- req->rq_req_portal = cl->cli_request_portal;
- req->rq_reply_portal = cl->cli_reply_portal;
- rc = ptl_send_rpc(req, &cl->cli_server);
- }
- if (rc) {
- CERROR("error %d, opcode %d\n", rc,
- req->rq_reqhdr->opc);
- return -rc;
- }
-
- CDEBUG(0, "-- sleeping\n");
- add_wait_queue(&req->rq_wait_for_rep, &wait);
- while (req->rq_repbuf == NULL) {
- set_current_state(TASK_INTERRUPTIBLE);
-
- /* if this process really wants to die, let it go */
- if (sigismember(&(current->pending.signal), SIGKILL) ||
- sigismember(&(current->pending.signal), SIGINT))
- break;
-
- schedule();
- }
- remove_wait_queue(&req->rq_wait_for_rep, &wait);
- set_current_state(TASK_RUNNING);
- CDEBUG(0, "-- done\n");
-
- if (req->rq_repbuf == NULL) {
- /* We broke out because of a signal. Clean up the dangling
- * reply buffers! */
- ptl_abort_rpc(req);
- EXIT;
- return -EINTR;
- }
-
- rc = cl->cli_rep_unpack(req->rq_repbuf, req->rq_replen, &req->rq_rephdr,
- &req->rq_rep);
- if (rc) {
- CERROR("unpack_rep failed: %d\n", rc);
- return rc;
- }
- CERROR("got rep %lld\n", req->rq_rephdr->seqno);
- if ( req->rq_rephdr->status == 0 )
- CDEBUG(0, "--> buf %p len %d status %d\n",
- req->rq_repbuf, req->rq_replen,
- req->rq_rephdr->status);
-
- EXIT;
- return 0;
-}
-/*
- * Free the packet when it has gone out
- */
-static int sent_packet_callback(ptl_event_t *ev, void *data)
-{
- ENTRY;
-
- if (ev->type == PTL_EVENT_SENT) {
- OBD_FREE(ev->mem_desc.start, ev->mem_desc.length);
- } else {
- // XXX make sure we understand all events, including ACK's
- CERROR("Unknown event %d\n", ev->type);
- BUG();
- }
-
- EXIT;
- return 1;
-}
-
-/*
- * Wake up the thread waiting for the reply once it comes in.
- */
-static int rcvd_reply_callback(ptl_event_t *ev, void *data)
-{
- struct ptlrpc_request *rpc = ev->mem_desc.user_ptr;
- ENTRY;
-
- if (ev->type == PTL_EVENT_PUT) {
- rpc->rq_repbuf = ev->mem_desc.start + ev->offset;
- barrier();
- wake_up_interruptible(&rpc->rq_wait_for_rep);
- } else {
- // XXX make sure we understand all events, including ACK's
- CERROR("Unknown event %d\n", ev->type);
- BUG();
- }
-
- EXIT;
- return 1;
-}
-
-static int server_request_callback(ptl_event_t *ev, void *data)
-{
- struct ptlrpc_service *service = data;
- int rc;
-
- if (ev->rlength != ev->mlength)
- CERROR("Warning: Possibly truncated rpc (%d/%d)\n",
- ev->mlength, ev->rlength);
-
- /* The ME is unlinked when there is less than 1024 bytes free
- * on its MD. This ensures we are always able to handle the rpc,
- * although the 1024 value is a guess as to the size of a
- * large rpc (the known safe margin should be determined).
- *
- * NOTE: The portals API by default unlinks all MD's associated
- * with an ME when it's unlinked. For now, this behavior
- * has been commented out of the portals library so the
- * MD can be unlinked when its ref count drops to zero.
- * A new MD and ME will then be created that use the same
- * kmalloc()'ed memory and inserted at the ring tail.
- */
-
- service->srv_ref_count[service->srv_md_active]++;
-
- if (ev->offset >= (service->srv_buf_size - 1024)) {
- CDEBUG(D_INODE, "Unlinking ME %d\n", service->srv_me_active);
-
- rc = PtlMEUnlink(service->srv_me_h[service->srv_me_active]);
- service->srv_me_h[service->srv_me_active] = 0;
-
- if (rc != PTL_OK) {
- CERROR("PtlMEUnlink failed - DROPPING soon: %d\n", rc);
- return rc;
- }
-
- service->srv_me_active = NEXT_INDEX(service->srv_me_active,
- service->srv_ring_length);
-
- if (service->srv_me_h[service->srv_me_active] == 0)
- CERROR("All %d ring ME's are unlinked!\n",
- service->srv_ring_length);
- }
-
- if (ev->type == PTL_EVENT_PUT) {
- wake_up(service->srv_wait_queue);
- } else {
- CERROR("Unexpected event type: %d\n", ev->type);
- }
-
- return 0;
-}
-
-static int bulk_source_callback(ptl_event_t *ev, void *data)
-{
- struct ptlrpc_request *rpc = ev->mem_desc.user_ptr;
-
- ENTRY;
-
- if (ev->type == PTL_EVENT_SENT) {
- CDEBUG(D_NET, "got SENT event\n");
- } else if (ev->type == PTL_EVENT_ACK) {
- CDEBUG(D_NET, "got ACK event\n");
- rpc->rq_bulkbuf = NULL;
- wake_up_interruptible(&rpc->rq_wait_for_bulk);
- } else {
- CERROR("Unexpected event type!\n");
- BUG();
- }
-
- EXIT;
- return 1;
-}
-
-static int bulk_sink_callback(ptl_event_t *ev, void *data)
-{
- struct ptlrpc_request *rpc = ev->mem_desc.user_ptr;
-
- ENTRY;
-
- if (ev->type == PTL_EVENT_PUT) {
- if (rpc->rq_bulkbuf != ev->mem_desc.start + ev->offset)
- CERROR("bulkbuf != mem_desc -- why?\n");
- //wake_up_interruptible(&rpc->rq_wait_for_bulk);
- } else {
- CERROR("Unexpected event type!\n");
- BUG();
- }
-
- EXIT;
- return 1;
-}
-
-int ptl_send_buf(struct ptlrpc_request *request, struct lustre_peer *peer,
- int portal)
-{
- int rc;
- ptl_process_id_t remote_id;
- ptl_handle_md_t md_h;
- ptl_ack_req_t ack;
-
- switch (request->rq_type) {
- case PTLRPC_BULK:
- request->rq_req_md.start = request->rq_bulkbuf;
- request->rq_req_md.length = request->rq_bulklen;
- request->rq_req_md.eventq = bulk_source_eq;
- request->rq_req_md.threshold = 2; /* SENT and ACK events */
- ack = PTL_ACK_REQ;
- break;
- case PTLRPC_REQUEST:
- request->rq_req_md.start = request->rq_reqbuf;
- request->rq_req_md.length = request->rq_reqlen;
- request->rq_req_md.eventq = sent_pkt_eq;
- request->rq_req_md.threshold = 1;
- ack = PTL_NOACK_REQ;
- break;
- case PTLRPC_REPLY:
- request->rq_req_md.start = request->rq_repbuf;
- request->rq_req_md.length = request->rq_replen;
- request->rq_req_md.eventq = sent_pkt_eq;
- request->rq_req_md.threshold = 1;
- ack = PTL_NOACK_REQ;
- break;
- default:
- BUG();
- }
- request->rq_req_md.options = PTL_MD_OP_PUT;
- request->rq_req_md.user_ptr = request;
-
- rc = PtlMDBind(peer->peer_ni, request->rq_req_md, &md_h);
- if (rc != 0) {
- BUG();
- CERROR("PtlMDBind failed: %d\n", rc);
- return rc;
- }
-
- remote_id.addr_kind = PTL_ADDR_NID;
- remote_id.nid = peer->peer_nid;
- remote_id.pid = 0;
-
- CERROR("Sending %d bytes to portal %d, xid %d\n",
- request->rq_req_md.length, portal, request->rq_xid);
-
- rc = PtlPut(md_h, ack, remote_id, portal, 0, request->rq_xid, 0, 0);
- if (rc != PTL_OK) {
- BUG();
- CERROR("PtlPut(%d, %d, %d) failed: %d\n", remote_id.nid,
- portal, request->rq_xid, rc);
- /* FIXME: tear down md */
- }
-
- return rc;
-}
-
-int ptl_send_rpc(struct ptlrpc_request *request, struct lustre_peer *peer)
-{
- ptl_process_id_t local_id;
- int rc;
- char *repbuf;
-
- ENTRY;
-
- if (request->rq_replen == 0) {
- CERROR("request->rq_replen is 0!\n");
- EXIT;
- return -EINVAL;
- }
-
- /* request->rq_repbuf is set only when the reply comes in, in
- * client_packet_callback() */
- OBD_ALLOC(repbuf, request->rq_replen);
- if (!repbuf) {
- EXIT;
- return -ENOMEM;
- }
-
- local_id.addr_kind = PTL_ADDR_GID;
- local_id.gid = PTL_ID_ANY;
- local_id.rid = PTL_ID_ANY;
-
- CERROR("sending req %d\n", request->rq_xid);
- rc = PtlMEAttach(peer->peer_ni, request->rq_reply_portal, local_id,
- request->rq_xid, 0, PTL_UNLINK,
- &request->rq_reply_me_h);
- if (rc != PTL_OK) {
- CERROR("PtlMEAttach failed: %d\n", rc);
- BUG();
- EXIT;
- goto cleanup;
- }
-
- request->rq_type = PTLRPC_REQUEST;
- request->rq_reply_md.start = repbuf;
- request->rq_reply_md.length = request->rq_replen;
- request->rq_reply_md.threshold = 1;
- request->rq_reply_md.options = PTL_MD_OP_PUT;
- request->rq_reply_md.user_ptr = request;
- request->rq_reply_md.eventq = rcvd_rep_eq;
-
- rc = PtlMDAttach(request->rq_reply_me_h, request->rq_reply_md,
- PTL_UNLINK, &request->rq_reply_md_h);
- if (rc != PTL_OK) {
- CERROR("PtlMDAttach failed: %d\n", rc);
- BUG();
- EXIT;
- goto cleanup2;
- }
-
- if (request->rq_bulklen != 0) {
- rc = PtlMEAttach(peer->peer_ni, request->rq_bulk_portal,
- local_id, request->rq_xid, 0, PTL_UNLINK,
- &request->rq_bulk_me_h);
- if (rc != PTL_OK) {
- CERROR("PtlMEAttach failed: %d\n", rc);
- BUG();
- EXIT;
- goto cleanup3;
- }
-
- request->rq_bulk_md.start = request->rq_bulkbuf;
- request->rq_bulk_md.length = request->rq_bulklen;
- request->rq_bulk_md.threshold = 1;
- request->rq_bulk_md.options = PTL_MD_OP_PUT;
- request->rq_bulk_md.user_ptr = request;
- request->rq_bulk_md.eventq = bulk_sink_eq;
-
- rc = PtlMDAttach(request->rq_bulk_me_h,
- request->rq_bulk_md, PTL_UNLINK,
- &request->rq_bulk_md_h);
- if (rc != PTL_OK) {
- CERROR("PtlMDAttach failed: %d\n", rc);
- BUG();
- EXIT;
- goto cleanup4;
- }
- }
-
- return ptl_send_buf(request, peer, request->rq_req_portal);
-
- cleanup4:
- PtlMEUnlink(request->rq_bulk_me_h);
- cleanup3:
- PtlMDUnlink(request->rq_reply_md_h);
- cleanup2:
- PtlMEUnlink(request->rq_reply_me_h);
- cleanup:
- OBD_FREE(repbuf, request->rq_replen);
-
- return rc;
-}
-
-/* ptl_received_rpc() should be called by the sleeping process once
- * it finishes processing an event. This ensures the ref count is
- * decremented and that the rpc ring buffer cycles properly.
- */
-int ptl_received_rpc(struct ptlrpc_service *service) {
- int rc, index;
-
- index = service->srv_md_active;
- CDEBUG(D_INFO, "MD index=%d Ref Count=%d\n", index,
- service->srv_ref_count[index]);
- service->srv_ref_count[index]--;
-
- if ((service->srv_ref_count[index] <= 0) &&
- (service->srv_me_h[index] == 0)) {
-
- /* Replace the unlinked ME and MD */
- rc = PtlMEInsert(service->srv_me_h[service->srv_me_tail],
- service->srv_id, 0, ~0, PTL_RETAIN,
- PTL_INS_AFTER, &(service->srv_me_h[index]));
- CDEBUG(D_INFO, "Inserting new ME and MD in ring, rc %d\n", rc);
- service->srv_me_tail = index;
- service->srv_ref_count[index] = 0;
-
- if (rc != PTL_OK) {
- CERROR("PtlMEInsert failed: %d\n", rc);
- return rc;
- }
-
- service->srv_md[index].start = service->srv_buf[index];
- service->srv_md[index].length = service->srv_buf_size;
- service->srv_md[index].threshold = PTL_MD_THRESH_INF;
- service->srv_md[index].options = PTL_MD_OP_PUT;
- service->srv_md[index].user_ptr = service;
- service->srv_md[index].eventq = service->srv_eq_h;
-
- rc = PtlMDAttach(service->srv_me_h[index],
- service->srv_md[index],
- PTL_RETAIN, &(service->srv_md_h[index]));
-
- CDEBUG(D_INFO, "Attach MD in ring, rc %d\n", rc);
- if (rc != PTL_OK) {
- /* XXX cleanup */
- BUG();
- CERROR("PtlMDAttach failed: %d\n", rc);
- return rc;
- }
-
- service->srv_md_active =
- NEXT_INDEX(index, service->srv_ring_length);
- }
-
- return 0;
-}
-
-int rpc_register_service(struct ptlrpc_service *service, char *uuid)
-{
- struct lustre_peer peer;
- int rc, i;
-
- rc = kportal_uuid_to_peer(uuid, &peer);
- if (rc != 0) {
- CERROR("Invalid uuid \"%s\"\n", uuid);
- return -EINVAL;
- }
-
- service->srv_ring_length = RPC_RING_LENGTH;
- service->srv_me_active = 0;
- service->srv_md_active = 0;
-
- service->srv_id.addr_kind = PTL_ADDR_GID;
- service->srv_id.gid = PTL_ID_ANY;
- service->srv_id.rid = PTL_ID_ANY;
-
- rc = PtlEQAlloc(peer.peer_ni, 128, server_request_callback,
- service, &(service->srv_eq_h));
-
- if (rc != PTL_OK) {
- CERROR("PtlEQAlloc failed: %d\n", rc);
- return rc;
- }
-
- /* Attach the leading ME on which we build the ring */
- rc = PtlMEAttach(peer.peer_ni, service->srv_portal,
- service->srv_id, 0, ~0, PTL_RETAIN,
- &(service->srv_me_h[0]));
-
- if (rc != PTL_OK) {
- CERROR("PtlMEAttach failed: %d\n", rc);
- return rc;
- }
-
- for (i = 0; i < service->srv_ring_length; i++) {
- OBD_ALLOC(service->srv_buf[i], service->srv_buf_size);
-
- if (service->srv_buf[i] == NULL) {
- CERROR("no memory\n");
- return -ENOMEM;
- }
-
- /* Insert additional ME's to the ring */
- if (i > 0) {
- rc = PtlMEInsert(service->srv_me_h[i-1],
- service->srv_id, 0, ~0, PTL_RETAIN,
- PTL_INS_AFTER,&(service->srv_me_h[i]));
- service->srv_me_tail = i;
-
- if (rc != PTL_OK) {
- CERROR("PtlMEInsert failed: %d\n", rc);
- return rc;
- }
- }
-
- service->srv_ref_count[i] = 0;
- service->srv_md[i].start = service->srv_buf[i];
- service->srv_md[i].length = service->srv_buf_size;
- service->srv_md[i].threshold = PTL_MD_THRESH_INF;
- service->srv_md[i].options = PTL_MD_OP_PUT;
- service->srv_md[i].user_ptr = service;
- service->srv_md[i].eventq = service->srv_eq_h;
-
- rc = PtlMDAttach(service->srv_me_h[i], service->srv_md[i],
- PTL_RETAIN, &(service->srv_md_h[i]));
-
- if (rc != PTL_OK) {
- /* cleanup */
- CERROR("PtlMDAttach failed: %d\n", rc);
- return rc;
- }
- }
-
- return 0;
-}
-
-int rpc_unregister_service(struct ptlrpc_service *service)
-{
- int rc, i;
-
- for (i = 0; i < service->srv_ring_length; i++) {
- rc = PtlMDUnlink(service->srv_md_h[i]);
- if (rc)
- CERROR("PtlMDUnlink failed: %d\n", rc);
-
- rc = PtlMEUnlink(service->srv_me_h[i]);
- if (rc)
- CERROR("PtlMEUnlink failed: %d\n", rc);
-
- OBD_FREE(service->srv_buf[i], service->srv_buf_size);
- }
-
- rc = PtlEQFree(service->srv_eq_h);
- if (rc)
- CERROR("PtlEQFree failed: %d\n", rc);
-
- return 0;
-}
-
-static int req_init_portals(void)
-{
- int rc;
- const ptl_handle_ni_t *nip;
- ptl_handle_ni_t ni;
-
- nip = inter_module_get_request(LUSTRE_NAL "_ni", LUSTRE_NAL);
- if (nip == NULL) {
- CERROR("get_ni failed: is the NAL module loaded?\n");
- return -EIO;
- }
- ni = *nip;
-
- rc = PtlEQAlloc(ni, 128, sent_packet_callback, NULL, &sent_pkt_eq);
- if (rc != PTL_OK)
- CERROR("PtlEQAlloc failed: %d\n", rc);
-
- rc = PtlEQAlloc(ni, 128, rcvd_reply_callback, NULL, &rcvd_rep_eq);
- if (rc != PTL_OK)
- CERROR("PtlEQAlloc failed: %d\n", rc);
-
- rc = PtlEQAlloc(ni, 128, bulk_source_callback, NULL, &bulk_source_eq);
- if (rc != PTL_OK)
- CERROR("PtlEQAlloc failed: %d\n", rc);
-
- rc = PtlEQAlloc(ni, 128, bulk_sink_callback, NULL, &bulk_sink_eq);
- if (rc != PTL_OK)
- CERROR("PtlEQAlloc failed: %d\n", rc);
-
- return rc;
-}
static int __init ptlrpc_init(void)
{
- return req_init_portals();
+ return ptlrpc_init_portals();
}
static void __exit ptlrpc_exit(void)
{
- PtlEQFree(sent_pkt_eq);
- PtlEQFree(rcvd_rep_eq);
- PtlEQFree(bulk_source_eq);
- PtlEQFree(bulk_sink_eq);
-
- inter_module_put(LUSTRE_NAL "_ni");
+ ptlrpc_exit_portals();
return;
}