lustre/ptlrpc/events.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/module.h>
  26 #include <linux/lustre_net.h>
  27
  28 ptl_handle_eq_t request_out_eq, reply_in_eq, reply_out_eq, bulk_source_eq,
  29         bulk_sink_eq;
  30 static const ptl_handle_ni_t *socknal_nip = NULL, *qswnal_nip = NULL;
  31
  32 /*
  33  *  Free the packet when it has gone out
  34  */
  35 static int request_out_callback(ptl_event_t *ev)
  36 {
  37         ENTRY;
  38
  39         if (ev->type != PTL_EVENT_SENT) {
  40                 // XXX make sure we understand all events, including ACK's
  41                 CERROR("Unknown event %d\n", ev->type);
  42                 LBUG();
  43         }
  44
  45         RETURN(1);
  46 }
  47
  48
  49 /*
  50  *  Free the packet when it has gone out
  51  */
  52 static int reply_out_callback(ptl_event_t *ev)
  53 {
  54         ENTRY;
  55
  56         if (ev->type == PTL_EVENT_SENT) {
  57                 OBD_FREE(ev->mem_desc.start, ev->mem_desc.length);
  58         } else {
  59                 // XXX make sure we understand all events, including ACK's
  60                 CERROR("Unknown event %d\n", ev->type);
  61                 LBUG();
  62         }
  63
  64         RETURN(1);
  65 }
  66
  67 /*
  68  * Wake up the thread waiting for the reply once it comes in.
  69  */
  70 static int reply_in_callback(ptl_event_t *ev)
  71 {
  72         struct ptlrpc_request *req = ev->mem_desc.user_ptr;
  73         ENTRY;
  74
  75         if (req->rq_xid == 0x5a5a5a5a) {
  76                 CERROR("Reply received for freed request!  Probably a missing "
  77                        "ptlrpc_abort()\n");
  78                 LBUG();
  79         }
  80
  81         if (req->rq_xid != ev->match_bits) {
  82                 CERROR("Reply packet for wrong request\n");
  83                 LBUG();
  84         }
  85
  86         if (ev->type == PTL_EVENT_PUT) {
  87                 req->rq_repmsg = ev->mem_desc.start + ev->offset;
  88                 barrier();
  89                 wake_up(&req->rq_wait_for_rep);
  90         } else {
  91                 // XXX make sure we understand all events, including ACK's
  92                 CERROR("Unknown event %d\n", ev->type);
  93                 LBUG();
  94         }
  95
  96         RETURN(1);
  97 }
  98
  99 int request_in_callback(ptl_event_t *ev)
 100 {
 101         struct ptlrpc_service *service = ev->mem_desc.user_ptr;
 102
 103         if (ev->rlength != ev->mlength)
 104                 CERROR("Warning: Possibly truncated rpc (%d/%d)\n",
 105                        ev->mlength, ev->rlength);
 106
 107         if (ev->type == PTL_EVENT_PUT)
 108                 wake_up(&service->srv_waitq);
 109         else
 110                 CERROR("Unexpected event type: %d\n", ev->type);
 111
 112         return 0;
 113 }
 114
 115 static int bulk_source_callback(ptl_event_t *ev)
 116 {
 117         struct ptlrpc_bulk_page *bulk = ev->mem_desc.user_ptr;
 118         struct ptlrpc_bulk_desc *desc = bulk->b_desc;
 119         ENTRY;
 120
 121         if (ev->type == PTL_EVENT_SENT) {
 122                 CDEBUG(D_NET, "got SENT event\n");
 123         } else if (ev->type == PTL_EVENT_ACK) {
 124                 CDEBUG(D_NET, "got ACK event\n");
 125                 if (bulk->b_cb != NULL)
 126                         bulk->b_cb(bulk);
 127                 if (atomic_dec_and_test(&desc->b_pages_remaining)) {
 128                         desc->b_flags |= PTL_BULK_FL_SENT;
 129                         wake_up(&desc->b_waitq);
 130                         if (desc->b_cb != NULL)
 131                                 desc->b_cb(desc, desc->b_cb_data);
 132                 }
 133         } else {
 134                 CERROR("Unexpected event type!\n");
 135                 LBUG();
 136         }
 137
 138         RETURN(1);
 139 }
 140
 141 static int bulk_sink_callback(ptl_event_t *ev)
 142 {
 143         struct ptlrpc_bulk_page *bulk = ev->mem_desc.user_ptr;
 144         struct ptlrpc_bulk_desc *desc = bulk->b_desc;
 145         ENTRY;
 146
 147         if (ev->type == PTL_EVENT_PUT) {
 148                 if (bulk->b_buf != ev->mem_desc.start + ev->offset)
 149                         CERROR("bulkbuf != mem_desc -- why?\n");
 150                 if (bulk->b_cb != NULL)
 151                         bulk->b_cb(bulk);
 152                 if (atomic_dec_and_test(&desc->b_pages_remaining)) {
 153                         desc->b_flags |= PTL_BULK_FL_RCVD;
 154                         wake_up(&desc->b_waitq);
 155                         if (desc->b_cb != NULL)
 156                                 desc->b_cb(desc, desc->b_cb_data);
 157                 }
 158         } else {
 159                 CERROR("Unexpected event type!\n");
 160                 LBUG();
 161         }
 162
 163         RETURN(1);
 164 }
 165
 166 int ptlrpc_init_portals(void)
 167 {
 168         int rc;
 169         ptl_handle_ni_t ni;
 170
 171         socknal_nip = inter_module_get_request("ksocknal_ni", "ksocknal");
 172         qswnal_nip = inter_module_get_request("kqswnal_ni", "kqswnal");
 173         if (socknal_nip == NULL && qswnal_nip == NULL) {
 174                 CERROR("get_ni failed: is a NAL module loaded?\n");
 175                 return -EIO;
 176         }
 177
 178         /* Use the qswnal if it's there */
 179         if (qswnal_nip != NULL)
 180                 ni = *qswnal_nip;
 181         else
 182                 ni = *socknal_nip;
 183
 184         rc = PtlEQAlloc(ni, 128, request_out_callback, &request_out_eq);
 185         if (rc != PTL_OK)
 186                 CERROR("PtlEQAlloc failed: %d\n", rc);
 187
 188         rc = PtlEQAlloc(ni, 128, reply_out_callback, &reply_out_eq);
 189         if (rc != PTL_OK)
 190                 CERROR("PtlEQAlloc failed: %d\n", rc);
 191
 192         rc = PtlEQAlloc(ni, 128, reply_in_callback, &reply_in_eq);
 193         if (rc != PTL_OK)
 194                 CERROR("PtlEQAlloc failed: %d\n", rc);
 195
 196         rc = PtlEQAlloc(ni, 128, bulk_source_callback, &bulk_source_eq);
 197         if (rc != PTL_OK)
 198                 CERROR("PtlEQAlloc failed: %d\n", rc);
 199
 200         rc = PtlEQAlloc(ni, 128, bulk_sink_callback, &bulk_sink_eq);
 201         if (rc != PTL_OK)
 202                 CERROR("PtlEQAlloc failed: %d\n", rc);
 203
 204         return rc;
 205 }
 206
 207 void ptlrpc_exit_portals(void)
 208 {
 209         PtlEQFree(request_out_eq);
 210         PtlEQFree(reply_out_eq);
 211         PtlEQFree(reply_in_eq);
 212         PtlEQFree(bulk_source_eq);
 213         PtlEQFree(bulk_sink_eq);
 214
 215         if (qswnal_nip != NULL)
 216                 inter_module_put("kqswnal_ni");
 217         if (socknal_nip != NULL)
 218                 inter_module_put("ksocknal_ni");
 219 }