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 EXPORT_SYMTAB
  24
  25 #include <linux/config.h>
  26 #include <linux/module.h>
  27 #include <linux/kernel.h>
  28
  29 #define DEBUG_SUBSYSTEM S_RPC
  30
  31 #include <linux/obd_support.h>
  32 #include <linux/obd_class.h>
  33 #include <linux/lustre_net.h>
  34
  35 ptl_handle_eq_t sent_pkt_eq, rcvd_rep_eq, bulk_source_eq, bulk_sink_eq;
  36 static const ptl_handle_ni_t *socknal_nip = NULL, *qswnal_nip = NULL;
  37
  38 /*
  39  *  Free the packet when it has gone out
  40  */
  41 static int sent_packet_callback(ptl_event_t *ev, void *data)
  42 {
  43         ENTRY;
  44
  45         if (ev->type == PTL_EVENT_SENT) {
  46                 OBD_FREE(ev->mem_desc.start, ev->mem_desc.length);
  47         } else {
  48                 // XXX make sure we understand all events, including ACK's
  49                 CERROR("Unknown event %d\n", ev->type);
  50                 LBUG();
  51         }
  52
  53         EXIT;
  54         return 1;
  55 }
  56
  57 /*
  58  * Wake up the thread waiting for the reply once it comes in.
  59  */
  60 static int rcvd_reply_callback(ptl_event_t *ev, void *data)
  61 {
  62         struct ptlrpc_request *rpc = ev->mem_desc.user_ptr;
  63         ENTRY;
  64
  65         if (ev->type == PTL_EVENT_PUT) {
  66                 rpc->rq_repbuf = ev->mem_desc.start + ev->offset;
  67                 barrier();
  68                 wake_up_interruptible(&rpc->rq_wait_for_rep);
  69         } else {
  70                 // XXX make sure we understand all events, including ACK's
  71                 CERROR("Unknown event %d\n", ev->type);
  72                 LBUG();
  73         }
  74
  75         EXIT;
  76         return 1;
  77 }
  78
  79 int server_request_callback(ptl_event_t *ev, void *data)
  80 {
  81         struct ptlrpc_service *service = data;
  82         int index;
  83
  84         if (ev->rlength != ev->mlength)
  85                 CERROR("Warning: Possibly truncated rpc (%d/%d)\n",
  86                        ev->mlength, ev->rlength);
  87
  88         spin_lock(&service->srv_lock);
  89         for (index = 0; index < service->srv_ring_length; index++)
  90                 if ( service->srv_buf[index] == ev->mem_desc.start)
  91                         break;
  92
  93         if (index == service->srv_ring_length)
  94                 LBUG();
  95
  96         service->srv_ref_count[index]++;
  97
  98         if (ev->unlinked_me != -1) {
  99                 int idx;
 100
 101                 for (idx = 0; idx < service->srv_ring_length; idx++)
 102                         if (service->srv_me_h[idx] == ev->unlinked_me)
 103                                 break;
 104                 if (idx == service->srv_ring_length)
 105                         LBUG();
 106
 107                 CDEBUG(D_NET, "unlinked %d\n", idx);
 108                 service->srv_me_h[idx] = 0;
 109
 110                 if (service->srv_ref_count[idx] == 0)
 111                         ptlrpc_link_svc_me(service, idx);
 112         }
 113
 114         spin_unlock(&service->srv_lock);
 115         if (ev->type == PTL_EVENT_PUT)
 116                 wake_up(&service->srv_waitq);
 117         else
 118                 CERROR("Unexpected event type: %d\n", ev->type);
 119
 120         return 0;
 121 }
 122
 123 static int bulk_source_callback(ptl_event_t *ev, void *data)
 124 {
 125         struct ptlrpc_bulk_desc *bulk = ev->mem_desc.user_ptr;
 126
 127         ENTRY;
 128
 129         if (ev->type == PTL_EVENT_SENT) {
 130                 CDEBUG(D_NET, "got SENT event\n");
 131         } else if (ev->type == PTL_EVENT_ACK) {
 132                 CDEBUG(D_NET, "got ACK event\n");
 133                 bulk->b_flags = PTL_BULK_SENT;
 134                 wake_up_interruptible(&bulk->b_waitq);
 135         } else {
 136                 CERROR("Unexpected event type!\n");
 137                 LBUG();
 138         }
 139
 140         EXIT;
 141         return 1;
 142 }
 143
 144 static int bulk_sink_callback(ptl_event_t *ev, void *data)
 145 {
 146         struct ptlrpc_bulk_desc *bulk = ev->mem_desc.user_ptr;
 147
 148         ENTRY;
 149
 150         if (ev->type == PTL_EVENT_PUT) {
 151                 if (bulk->b_buf != ev->mem_desc.start + ev->offset)
 152                         CERROR("bulkbuf != mem_desc -- why?\n");
 153                 bulk->b_flags = PTL_BULK_RCVD;
 154                 if (bulk->b_cb != NULL)
 155                         bulk->b_cb(bulk, data);
 156                 wake_up_interruptible(&bulk->b_waitq);
 157         } else {
 158                 CERROR("Unexpected event type!\n");
 159                 LBUG();
 160         }
 161
 162         /* FIXME: This should happen unconditionally */
 163         if (bulk->b_cb != NULL)
 164                 OBD_FREE(bulk, sizeof(*bulk));
 165
 166         EXIT;
 167         return 1;
 168 }
 169
 170 int ptlrpc_init_portals(void)
 171 {
 172         int rc;
 173         ptl_handle_ni_t ni;
 174
 175         socknal_nip = inter_module_get_request("ksocknal_ni", "ksocknal");
 176         qswnal_nip = inter_module_get_request("kqswnal_ni", "kqswnal");
 177         if (socknal_nip == NULL && qswnal_nip == NULL) {
 178                 CERROR("get_ni failed: is a NAL module loaded?\n");
 179                 return -EIO;
 180         }
 181
 182         /* Use the qswnal if it's there */
 183         if (qswnal_nip != NULL)
 184                 ni = *qswnal_nip;
 185         else
 186                 ni = *socknal_nip;
 187
 188         rc = PtlEQAlloc(ni, 128, sent_packet_callback, NULL, &sent_pkt_eq);
 189         if (rc != PTL_OK)
 190                 CERROR("PtlEQAlloc failed: %d\n", rc);
 191
 192         rc = PtlEQAlloc(ni, 128, rcvd_reply_callback, NULL, &rcvd_rep_eq);
 193         if (rc != PTL_OK)
 194                 CERROR("PtlEQAlloc failed: %d\n", rc);
 195
 196         rc = PtlEQAlloc(ni, 128, bulk_source_callback, NULL, &bulk_source_eq);
 197         if (rc != PTL_OK)
 198                 CERROR("PtlEQAlloc failed: %d\n", rc);
 199
 200         rc = PtlEQAlloc(ni, 128, bulk_sink_callback, NULL, &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(sent_pkt_eq);
 210         PtlEQFree(rcvd_rep_eq);
 211         PtlEQFree(bulk_source_eq);
 212         PtlEQFree(bulk_sink_eq);
 213
 214         if (qswnal_nip != NULL)
 215                 inter_module_put("kqswnal_ni");
 216         if (socknal_nip != NULL)
 217                 inter_module_put("ksocknal_ni");
 218 }