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 != ev->match_bits) {
  76                 CERROR("Reply packet for wrong request\n");
  77                 LBUG();
  78         }
  79
  80         if (ev->type == PTL_EVENT_PUT) {
  81                 req->rq_repmsg = ev->mem_desc.start + ev->offset;
  82                 barrier();
  83                 wake_up_interruptible(&req->rq_wait_for_rep);
  84         } else {
  85                 // XXX make sure we understand all events, including ACK's
  86                 CERROR("Unknown event %d\n", ev->type);
  87                 LBUG();
  88         }
  89
  90         RETURN(1);
  91 }
  92
  93 int request_in_callback(ptl_event_t *ev)
  94 {
  95         struct ptlrpc_service *service = ev->mem_desc.user_ptr;
  96
  97         if (ev->rlength != ev->mlength)
  98                 CERROR("Warning: Possibly truncated rpc (%d/%d)\n",
  99                        ev->mlength, ev->rlength);
 100
 101         if (ev->type == PTL_EVENT_PUT)
 102                 wake_up(&service->srv_waitq);
 103         else
 104                 CERROR("Unexpected event type: %d\n", ev->type);
 105
 106         return 0;
 107 }
 108
 109 static int bulk_source_callback(ptl_event_t *ev)
 110 {
 111         struct ptlrpc_bulk_page *bulk = ev->mem_desc.user_ptr;
 112         struct ptlrpc_bulk_desc *desc = bulk->b_desc;
 113         ENTRY;
 114
 115         if (ev->type == PTL_EVENT_SENT) {
 116                 CDEBUG(D_NET, "got SENT event\n");
 117         } else if (ev->type == PTL_EVENT_ACK) {
 118                 CDEBUG(D_NET, "got ACK event\n");
 119                 if (bulk->b_cb != NULL)
 120                         bulk->b_cb(bulk);
 121                 if (atomic_dec_and_test(&desc->b_pages_remaining)) {
 122                         desc->b_flags |= PTL_BULK_FL_SENT;
 123                         wake_up_interruptible(&desc->b_waitq);
 124                         if (desc->b_cb != NULL)
 125                                 desc->b_cb(desc, desc->b_cb_data);
 126                 }
 127         } else {
 128                 CERROR("Unexpected event type!\n");
 129                 LBUG();
 130         }
 131
 132         RETURN(1);
 133 }
 134
 135 static int bulk_sink_callback(ptl_event_t *ev)
 136 {
 137         struct ptlrpc_bulk_page *bulk = ev->mem_desc.user_ptr;
 138         struct ptlrpc_bulk_desc *desc = bulk->b_desc;
 139         ENTRY;
 140
 141         if (ev->type == PTL_EVENT_PUT) {
 142                 if (bulk->b_buf != ev->mem_desc.start + ev->offset)
 143                         CERROR("bulkbuf != mem_desc -- why?\n");
 144                 if (bulk->b_cb != NULL)
 145                         bulk->b_cb(bulk);
 146                 if (atomic_dec_and_test(&desc->b_pages_remaining)) {
 147                         desc->b_flags |= PTL_BULK_FL_RCVD;
 148                         wake_up_interruptible(&desc->b_waitq);
 149                         if (desc->b_cb != NULL)
 150                                 desc->b_cb(desc, desc->b_cb_data);
 151                 }
 152         } else {
 153                 CERROR("Unexpected event type!\n");
 154                 LBUG();
 155         }
 156
 157         RETURN(1);
 158 }
 159
 160 int ptlrpc_init_portals(void)
 161 {
 162         int rc;
 163         ptl_handle_ni_t ni;
 164
 165         socknal_nip = inter_module_get_request("ksocknal_ni", "ksocknal");
 166         qswnal_nip = inter_module_get_request("kqswnal_ni", "kqswnal");
 167         if (socknal_nip == NULL && qswnal_nip == NULL) {
 168                 CERROR("get_ni failed: is a NAL module loaded?\n");
 169                 return -EIO;
 170         }
 171
 172         /* Use the qswnal if it's there */
 173         if (qswnal_nip != NULL)
 174                 ni = *qswnal_nip;
 175         else
 176                 ni = *socknal_nip;
 177
 178         rc = PtlEQAlloc(ni, 128, request_out_callback, &request_out_eq);
 179         if (rc != PTL_OK)
 180                 CERROR("PtlEQAlloc failed: %d\n", rc);
 181
 182         rc = PtlEQAlloc(ni, 128, reply_out_callback, &reply_out_eq);
 183         if (rc != PTL_OK)
 184                 CERROR("PtlEQAlloc failed: %d\n", rc);
 185
 186         rc = PtlEQAlloc(ni, 128, reply_in_callback, &reply_in_eq);
 187         if (rc != PTL_OK)
 188                 CERROR("PtlEQAlloc failed: %d\n", rc);
 189
 190         rc = PtlEQAlloc(ni, 128, bulk_source_callback, &bulk_source_eq);
 191         if (rc != PTL_OK)
 192                 CERROR("PtlEQAlloc failed: %d\n", rc);
 193
 194         rc = PtlEQAlloc(ni, 128, bulk_sink_callback, &bulk_sink_eq);
 195         if (rc != PTL_OK)
 196                 CERROR("PtlEQAlloc failed: %d\n", rc);
 197
 198         return rc;
 199 }
 200
 201 void ptlrpc_exit_portals(void)
 202 {
 203         PtlEQFree(request_out_eq);
 204         PtlEQFree(reply_out_eq);
 205         PtlEQFree(reply_in_eq);
 206         PtlEQFree(bulk_source_eq);
 207         PtlEQFree(bulk_sink_eq);
 208
 209         if (qswnal_nip != NULL)
 210                 inter_module_put("kqswnal_ni");
 211         if (socknal_nip != NULL)
 212                 inter_module_put("ksocknal_ni");
 213 }