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         RETURN(1);
  54 }
  55
  56 /*
  57  * Wake up the thread waiting for the reply once it comes in.
  58  */
  59 static int rcvd_reply_callback(ptl_event_t *ev, void *data)
  60 {
  61         struct ptlrpc_request *rpc = ev->mem_desc.user_ptr;
  62         ENTRY;
  63
  64         if (ev->type == PTL_EVENT_PUT) {
  65                 rpc->rq_repbuf = ev->mem_desc.start + ev->offset;
  66                 barrier();
  67                 wake_up_interruptible(&rpc->rq_wait_for_rep);
  68         } else {
  69                 // XXX make sure we understand all events, including ACK's
  70                 CERROR("Unknown event %d\n", ev->type);
  71                 LBUG();
  72         }
  73
  74         RETURN(1);
  75 }
  76
  77 int server_request_callback(ptl_event_t *ev, void *data)
  78 {
  79         struct ptlrpc_service *service = data;
  80         int index;
  81
  82         if (ev->rlength != ev->mlength)
  83                 CERROR("Warning: Possibly truncated rpc (%d/%d)\n",
  84                        ev->mlength, ev->rlength);
  85
  86         spin_lock(&service->srv_lock);
  87         for (index = 0; index < service->srv_ring_length; index++)
  88                 if ( service->srv_buf[index] == ev->mem_desc.start)
  89                         break;
  90
  91         if (index == service->srv_ring_length)
  92                 LBUG();
  93
  94         service->srv_ref_count[index]++;
  95
  96         if (ev->unlinked_me != -1) {
  97                 int idx;
  98
  99                 for (idx = 0; idx < service->srv_ring_length; idx++)
 100                         if (service->srv_me_h[idx] == ev->unlinked_me)
 101                                 break;
 102                 if (idx == service->srv_ring_length)
 103                         LBUG();
 104
 105                 CDEBUG(D_NET, "unlinked %d\n", idx);
 106                 service->srv_me_h[idx] = 0;
 107
 108                 if (service->srv_ref_count[idx] == 0)
 109                         ptlrpc_link_svc_me(service, idx);
 110         }
 111
 112         spin_unlock(&service->srv_lock);
 113         if (ev->type == PTL_EVENT_PUT)
 114                 wake_up(&service->srv_waitq);
 115         else
 116                 CERROR("Unexpected event type: %d\n", ev->type);
 117
 118         return 0;
 119 }
 120
 121 static int bulk_source_callback(ptl_event_t *ev, void *data)
 122 {
 123         struct ptlrpc_bulk_desc *bulk = ev->mem_desc.user_ptr;
 124
 125         ENTRY;
 126
 127         if (ev->type == PTL_EVENT_SENT) {
 128                 CDEBUG(D_NET, "got SENT event\n");
 129         } else if (ev->type == PTL_EVENT_ACK) {
 130                 CDEBUG(D_NET, "got ACK event\n");
 131                 bulk->b_flags = PTL_BULK_SENT;
 132                 wake_up_interruptible(&bulk->b_waitq);
 133         } else {
 134                 CERROR("Unexpected event type!\n");
 135                 LBUG();
 136         }
 137
 138         EXIT;
 139         return 1;
 140 }
 141
 142 static int bulk_sink_callback(ptl_event_t *ev, void *data)
 143 {
 144         struct ptlrpc_bulk_desc *bulk = ev->mem_desc.user_ptr;
 145
 146         ENTRY;
 147
 148         if (ev->type == PTL_EVENT_PUT) {
 149                 if (bulk->b_buf != ev->mem_desc.start + ev->offset)
 150                         CERROR("bulkbuf != mem_desc -- why?\n");
 151                 bulk->b_flags = PTL_BULK_RCVD;
 152                 if (bulk->b_cb != NULL)
 153                         bulk->b_cb(bulk, data);
 154                 wake_up_interruptible(&bulk->b_waitq);
 155         } else {
 156                 CERROR("Unexpected event type!\n");
 157                 LBUG();
 158         }
 159
 160         /* FIXME: This should happen unconditionally */
 161         if (bulk->b_cb != NULL)
 162                 OBD_FREE(bulk, sizeof(*bulk));
 163
 164         EXIT;
 165         return 1;
 166 }
 167
 168 int ptlrpc_init_portals(void)
 169 {
 170         int rc;
 171         ptl_handle_ni_t ni;
 172
 173         socknal_nip = inter_module_get_request("ksocknal_ni", "ksocknal");
 174         qswnal_nip = inter_module_get_request("kqswnal_ni", "kqswnal");
 175         if (socknal_nip == NULL && qswnal_nip == NULL) {
 176                 CERROR("get_ni failed: is a NAL module loaded?\n");
 177                 return -EIO;
 178         }
 179
 180         /* Use the qswnal if it's there */
 181         if (qswnal_nip != NULL)
 182                 ni = *qswnal_nip;
 183         else
 184                 ni = *socknal_nip;
 185
 186         rc = PtlEQAlloc(ni, 128, sent_packet_callback, NULL, &sent_pkt_eq);
 187         if (rc != PTL_OK)
 188                 CERROR("PtlEQAlloc failed: %d\n", rc);
 189
 190         rc = PtlEQAlloc(ni, 128, rcvd_reply_callback, NULL, &rcvd_rep_eq);
 191         if (rc != PTL_OK)
 192                 CERROR("PtlEQAlloc failed: %d\n", rc);
 193
 194         rc = PtlEQAlloc(ni, 128, bulk_source_callback, NULL, &bulk_source_eq);
 195         if (rc != PTL_OK)
 196                 CERROR("PtlEQAlloc failed: %d\n", rc);
 197
 198         rc = PtlEQAlloc(ni, 128, bulk_sink_callback, NULL, &bulk_sink_eq);
 199         if (rc != PTL_OK)
 200                 CERROR("PtlEQAlloc failed: %d\n", rc);
 201
 202         return rc;
 203 }
 204
 205 void ptlrpc_exit_portals(void)
 206 {
 207         PtlEQFree(sent_pkt_eq);
 208         PtlEQFree(rcvd_rep_eq);
 209         PtlEQFree(bulk_source_eq);
 210         PtlEQFree(bulk_sink_eq);
 211
 212         if (qswnal_nip != NULL)
 213                 inter_module_put("kqswnal_ni");
 214         if (socknal_nip != NULL)
 215                 inter_module_put("ksocknal_ni");
 216 }