lustre/ptlrpc/niobuf.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2002 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #define DEBUG_SUBSYSTEM S_RPC
  24
  25 #include <linux/lustre_net.h>
  26
  27 extern ptl_handle_eq_t request_out_eq, reply_in_eq, reply_out_eq,
  28         bulk_source_eq, bulk_sink_eq;
  29 static ptl_process_id_t local_id = {PTL_NID_ANY, PTL_PID_ANY};
  30
  31 int ptlrpc_check_bulk_sent(struct ptlrpc_bulk_desc *bulk)
  32 {
  33         ENTRY;
  34
  35         if (bulk->b_flags & PTL_BULK_FL_SENT)
  36                 RETURN(1);
  37
  38         if (sigismember(&(current->pending.signal), SIGKILL) ||
  39             sigismember(&(current->pending.signal), SIGINT)) {
  40                 bulk->b_flags |= PTL_RPC_FL_INTR;
  41                 RETURN(1);
  42         }
  43
  44         CDEBUG(D_NET, "no event yet\n");
  45         RETURN(0);
  46 }
  47
  48 static int ptl_send_buf(struct ptlrpc_request *request,
  49                         struct ptlrpc_connection *conn, int portal)
  50 {
  51         int rc;
  52         ptl_process_id_t remote_id;
  53         ptl_handle_md_t md_h;
  54         ptl_ack_req_t ack;
  55
  56         request->rq_req_md.user_ptr = request;
  57
  58         switch (request->rq_type) {
  59         case PTL_RPC_TYPE_REQUEST:
  60                 request->rq_req_md.start = request->rq_reqmsg;
  61                 request->rq_req_md.length = request->rq_reqlen;
  62                 request->rq_req_md.eventq = request_out_eq;
  63                 request->rq_req_md.threshold = 1;
  64                 ack = PTL_NOACK_REQ;
  65                 break;
  66         case PTL_RPC_TYPE_REPLY:
  67                 request->rq_req_md.start = request->rq_repmsg;
  68                 request->rq_req_md.length = request->rq_replen;
  69                 request->rq_req_md.eventq = reply_out_eq;
  70                 request->rq_req_md.threshold = 1;
  71                 ack = PTL_NOACK_REQ;
  72                 break;
  73         default:
  74                 LBUG();
  75                 return -1; /* notreached */
  76         }
  77         request->rq_req_md.options = PTL_MD_OP_PUT;
  78         request->rq_req_md.user_ptr = request;
  79
  80         rc = PtlMDBind(conn->c_peer.peer_ni, request->rq_req_md, &md_h);
  81         //CERROR("MDBind (outgoing req/rep/bulk): %Lu\n", (__u64)md_h);
  82         if (rc != 0) {
  83                 CERROR("PtlMDBind failed: %d\n", rc);
  84                 LBUG();
  85                 return rc;
  86         }
  87
  88         remote_id.nid = conn->c_peer.peer_nid;
  89         remote_id.pid = 0;
  90
  91         CDEBUG(D_NET, "Sending %d bytes to portal %d, xid %Ld\n",
  92                request->rq_req_md.length, portal, request->rq_xid);
  93
  94         rc = PtlPut(md_h, ack, remote_id, portal, 0, request->rq_xid,
  95                     0, 0);
  96         if (rc != PTL_OK) {
  97                 CERROR("PtlPut(%Lu, %d, %Ld) failed: %d\n", remote_id.nid,
  98                        portal, request->rq_xid, rc);
  99                 PtlMDUnlink(md_h);
 100         }
 101
 102         return rc;
 103 }
 104
 105 int ptlrpc_send_bulk(struct ptlrpc_bulk_desc *desc)
 106 {
 107         int rc;
 108         struct list_head *tmp, *next;
 109         ptl_process_id_t remote_id;
 110         ENTRY;
 111
 112         list_for_each_safe(tmp, next, &desc->b_page_list) {
 113                 struct ptlrpc_bulk_page *bulk;
 114                 bulk = list_entry(tmp, struct ptlrpc_bulk_page, b_link);
 115
 116                 bulk->b_md.start = bulk->b_buf;
 117                 bulk->b_md.length = bulk->b_buflen;
 118                 bulk->b_md.eventq = bulk_source_eq;
 119                 bulk->b_md.threshold = 2; /* SENT and ACK */
 120                 bulk->b_md.options = PTL_MD_OP_PUT;
 121                 bulk->b_md.user_ptr = bulk;
 122
 123                 rc = PtlMDBind(desc->b_connection->c_peer.peer_ni, bulk->b_md,
 124                                &bulk->b_md_h);
 125                 if (rc != 0) {
 126                         CERROR("PtlMDBind failed: %d\n", rc);
 127                         LBUG();
 128                         RETURN(rc);
 129                 }
 130
 131                 remote_id.nid = desc->b_connection->c_peer.peer_nid;
 132                 remote_id.pid = 0;
 133
 134                 CDEBUG(D_NET, "Sending %d bytes to portal %d, xid %d\n",
 135                        bulk->b_md.length, desc->b_portal, bulk->b_xid);
 136
 137                 rc = PtlPut(bulk->b_md_h, PTL_ACK_REQ, remote_id,
 138                             desc->b_portal, 0, bulk->b_xid, 0, 0);
 139                 if (rc != PTL_OK) {
 140                         CERROR("PtlPut(%Lu, %d, %d) failed: %d\n",
 141                                remote_id.nid, desc->b_portal, bulk->b_xid, rc);
 142                         PtlMDUnlink(bulk->b_md_h);
 143                         LBUG();
 144                         RETURN(rc);
 145                 }
 146         }
 147
 148         RETURN(0);
 149 }
 150
 151 int ptlrpc_register_bulk(struct ptlrpc_bulk_desc *desc)
 152 {
 153         struct list_head *tmp, *next;
 154         int rc;
 155         ENTRY;
 156
 157         list_for_each_safe(tmp, next, &desc->b_page_list) {
 158                 struct ptlrpc_bulk_page *bulk;
 159                 bulk = list_entry(tmp, struct ptlrpc_bulk_page, b_link);
 160
 161                 rc = PtlMEAttach(desc->b_connection->c_peer.peer_ni,
 162                                  desc->b_portal, local_id, bulk->b_xid, 0,
 163                                  PTL_UNLINK, PTL_INS_AFTER, &bulk->b_me_h);
 164                 if (rc != PTL_OK) {
 165                         CERROR("PtlMEAttach failed: %d\n", rc);
 166                         LBUG();
 167                         GOTO(cleanup, rc);
 168                 }
 169
 170                 bulk->b_md.start = bulk->b_buf;
 171                 bulk->b_md.length = bulk->b_buflen;
 172                 bulk->b_md.threshold = 1;
 173                 bulk->b_md.options = PTL_MD_OP_PUT;
 174                 bulk->b_md.user_ptr = bulk;
 175                 bulk->b_md.eventq = bulk_sink_eq;
 176
 177                 rc = PtlMDAttach(bulk->b_me_h, bulk->b_md, PTL_UNLINK,
 178                                  &bulk->b_md_h);
 179                 if (rc != PTL_OK) {
 180                         CERROR("PtlMDAttach failed: %d\n", rc);
 181                         LBUG();
 182                         GOTO(cleanup, rc);
 183                 }
 184
 185                 CDEBUG(D_NET, "Setup bulk sink buffer: %u bytes, xid %u, "
 186                        "portal %u\n", bulk->b_buflen, bulk->b_xid,
 187                        desc->b_portal);
 188         }
 189
 190         RETURN(0);
 191
 192  cleanup:
 193         ptlrpc_abort_bulk(desc);
 194
 195         return rc;
 196 }
 197
 198 int ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *desc)
 199 {
 200         struct list_head *tmp, *next;
 201
 202         list_for_each_safe(tmp, next, &desc->b_page_list) {
 203                 struct ptlrpc_bulk_page *bulk;
 204                 bulk = list_entry(tmp, struct ptlrpc_bulk_page, b_link);
 205
 206                 /* This should be safe: these handles are initialized to be
 207                  * invalid in ptlrpc_prep_bulk_page() */
 208                 PtlMDUnlink(bulk->b_md_h);
 209                 PtlMEUnlink(bulk->b_me_h);
 210         }
 211
 212         return 0;
 213 }
 214
 215 int ptlrpc_reply(struct ptlrpc_service *svc, struct ptlrpc_request *req)
 216 {
 217         /* FIXME: we need to increment the count of handled events */
 218         req->rq_type = PTL_RPC_TYPE_REPLY;
 219         //req->rq_repmsg->conn = req->rq_connection->c_remote_conn;
 220         //req->rq_repmsg->token = req->rq_connection->c_remote_token;
 221         req->rq_repmsg->status = HTON__u32(req->rq_status);
 222         req->rq_reqmsg->type = HTON__u32(req->rq_type);
 223         return ptl_send_buf(req, req->rq_connection, svc->srv_rep_portal);
 224 }
 225
 226 int ptlrpc_error(struct ptlrpc_service *svc, struct ptlrpc_request *req)
 227 {
 228         int rc;
 229         ENTRY;
 230
 231         if (req->rq_repmsg) {
 232                 CERROR("req already has repmsg\n");
 233                 LBUG();
 234         }
 235
 236         rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
 237         if (rc)
 238                 RETURN(rc);
 239
 240         req->rq_repmsg->type = HTON__u32(PTL_RPC_MSG_ERR);
 241
 242         rc = ptlrpc_reply(svc, req);
 243         RETURN(rc);
 244 }
 245
 246
 247 int ptl_send_rpc(struct ptlrpc_request *request)
 248 {
 249         int rc;
 250         char *repbuf;
 251
 252         ENTRY;
 253
 254         if (NTOH__u32(request->rq_reqmsg->type) != PTL_RPC_MSG_REQUEST) {
 255                 CERROR("wrong packet type sent %d\n",
 256                        NTOH__u32(request->rq_reqmsg->type));
 257                 LBUG();
 258                 RETURN(EINVAL);
 259         }
 260         if (request->rq_replen == 0) {
 261                 CERROR("request->rq_replen is 0!\n");
 262                 RETURN(EINVAL);
 263         }
 264
 265         /* request->rq_repmsg is set only when the reply comes in, in
 266          * client_packet_callback() */
 267         if (request->rq_reply_md.start)
 268                 OBD_FREE(request->rq_reply_md.start, request->rq_replen);
 269
 270         OBD_ALLOC(repbuf, request->rq_replen);
 271         if (!repbuf) {
 272                 LBUG();
 273                 RETURN(ENOMEM);
 274         }
 275
 276         down(&request->rq_client->cli_rpc_sem);
 277
 278         rc = PtlMEAttach(request->rq_connection->c_peer.peer_ni,
 279                          request->rq_client->cli_reply_portal,
 280                          local_id, request->rq_xid, 0, PTL_UNLINK,
 281                          PTL_INS_AFTER, &request->rq_reply_me_h);
 282         if (rc != PTL_OK) {
 283                 CERROR("PtlMEAttach failed: %d\n", rc);
 284                 LBUG();
 285                 GOTO(cleanup, rc);
 286         }
 287
 288         request->rq_type = PTL_RPC_TYPE_REQUEST;
 289         request->rq_reply_md.start = repbuf;
 290         request->rq_reply_md.length = request->rq_replen;
 291         request->rq_reply_md.threshold = 1;
 292         request->rq_reply_md.options = PTL_MD_OP_PUT;
 293         request->rq_reply_md.user_ptr = request;
 294         request->rq_reply_md.eventq = reply_in_eq;
 295
 296         rc = PtlMDAttach(request->rq_reply_me_h, request->rq_reply_md,
 297                          PTL_UNLINK, &request->rq_reply_md_h);
 298         if (rc != PTL_OK) {
 299                 CERROR("PtlMDAttach failed: %d\n", rc);
 300                 LBUG();
 301                 GOTO(cleanup2, rc);
 302         }
 303
 304         CDEBUG(D_NET, "Setup reply buffer: %u bytes, xid %Lu, portal %u\n",
 305                request->rq_replen, request->rq_xid,
 306                request->rq_client->cli_reply_portal);
 307
 308         rc = ptl_send_buf(request, request->rq_connection,
 309                           request->rq_client->cli_request_portal);
 310         RETURN(rc);
 311
 312  cleanup2:
 313         PtlMEUnlink(request->rq_reply_me_h);
 314  cleanup:
 315         OBD_FREE(repbuf, request->rq_replen);
 316         up(&request->rq_client->cli_rpc_sem);
 317
 318         return rc;
 319 }
 320
 321 void ptlrpc_link_svc_me(struct ptlrpc_service *service, int i)
 322 {
 323         int rc;
 324         ptl_md_t dummy;
 325         ptl_handle_md_t md_h;
 326
 327         /* Attach the leading ME on which we build the ring */
 328         rc = PtlMEAttach(service->srv_self.peer_ni, service->srv_req_portal,
 329                          local_id, 0, ~0, PTL_RETAIN, PTL_INS_BEFORE,
 330                          &(service->srv_me_h[i]));
 331         if (rc != PTL_OK) {
 332                 CERROR("PtlMEAttach failed: %d\n", rc);
 333                 LBUG();
 334         }
 335
 336         if (service->srv_ref_count[i])
 337                 LBUG();
 338
 339         dummy.start         = service->srv_buf[i];
 340         dummy.length        = service->srv_buf_size;
 341         dummy.max_offset    = service->srv_buf_size;
 342         dummy.threshold     = PTL_MD_THRESH_INF;
 343         dummy.options       = PTL_MD_OP_PUT | PTL_MD_AUTO_UNLINK;
 344         dummy.user_ptr      = service;
 345         dummy.eventq        = service->srv_eq_h;
 346         dummy.max_offset    = service->srv_buf_size;
 347
 348         rc = PtlMDAttach(service->srv_me_h[i], dummy, PTL_UNLINK, &md_h);
 349         if (rc != PTL_OK) {
 350                 /* cleanup */
 351                 CERROR("PtlMDAttach failed: %d\n", rc);
 352                 LBUG();
 353         }
 354 }
 355
 356 /* ptl_handled_rpc() should be called by the sleeping process once
 357  * it finishes processing an event.  This ensures the ref count is
 358  * decremented and that the rpc ring buffer cycles properly.
 359  */
 360 int ptl_handled_rpc(struct ptlrpc_service *service, void *start)
 361 {
 362         int index;
 363
 364         spin_lock(&service->srv_lock);
 365         for (index = 0; index < service->srv_ring_length; index++)
 366                 if (service->srv_buf[index] == start)
 367                         break;
 368
 369         if (index == service->srv_ring_length)
 370                 LBUG();
 371
 372         CDEBUG(D_INFO, "MD index=%d Ref Count=%d\n", index,
 373                service->srv_ref_count[index]);
 374         service->srv_ref_count[index]--;
 375
 376         if (service->srv_ref_count[index] < 0)
 377                 LBUG();
 378
 379         if (service->srv_ref_count[index] == 0 &&
 380             !ptl_is_valid_handle(&(service->srv_me_h[index]))) {
 381                 CDEBUG(D_NET, "relinking %d\n", index);
 382                 ptlrpc_link_svc_me(service, index);
 383         }
 384
 385         spin_unlock(&service->srv_lock);
 386         return 0;
 387 }