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/module.h>
  26
  27 #define DEBUG_SUBSYSTEM S_RPC
  28
  29 #include <linux/lustre_net.h>
  30
  31 ptl_handle_eq_t request_out_eq,
  32                 reply_in_eq,
  33                 reply_out_eq,
  34                 bulk_source_eq,
  35                 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 request_out_callback(ptl_event_t *ev, void *data)
  42 {
  43         struct ptlrpc_request *req = ev->mem_desc.user_ptr;
  44         struct ptlrpc_client *cl = req->rq_client;
  45
  46         ENTRY;
  47
  48         if (ev->type == PTL_EVENT_SENT) {
  49                 list_del(&req->rq_list);
  50                 list_add(&req->rq_list, &cl->cli_sent_head);
  51         } else {
  52                 // XXX make sure we understand all events, including ACK's
  53                 CERROR("Unknown event %d\n", ev->type);
  54                 LBUG();
  55         }
  56
  57         RETURN(1);
  58 }
  59
  60
  61 /*
  62  *  Free the packet when it has gone out
  63  */
  64 static int reply_out_callback(ptl_event_t *ev, void *data)
  65 {
  66         ENTRY;
  67
  68         if (ev->type == PTL_EVENT_SENT) {
  69                 OBD_FREE(ev->mem_desc.start, ev->mem_desc.length);
  70         } else {
  71                 // XXX make sure we understand all events, including ACK's
  72                 CERROR("Unknown event %d\n", ev->type);
  73                 LBUG();
  74         }
  75
  76         RETURN(1);
  77 }
  78
  79 /*
  80  * Wake up the thread waiting for the reply once it comes in.
  81  */
  82 static int reply_in_callback(ptl_event_t *ev, void *data)
  83 {
  84         struct ptlrpc_request *rpc = ev->mem_desc.user_ptr;
  85         ENTRY;
  86
  87         if (ev->type == PTL_EVENT_PUT) {
  88                 rpc->rq_repmsg = ev->mem_desc.start + ev->offset;
  89                 barrier();
  90                 wake_up_interruptible(&rpc->rq_wait_for_rep);
  91         } else {
  92                 // XXX make sure we understand all events, including ACK's
  93                 CERROR("Unknown event %d\n", ev->type);
  94                 LBUG();
  95         }
  96
  97         RETURN(1);
  98 }
  99
 100 int request_in_callback(ptl_event_t *ev, void *data)
 101 {
 102         struct ptlrpc_service *service = data;
 103         int index;
 104
 105         if (ev->rlength != ev->mlength)
 106                 CERROR("Warning: Possibly truncated rpc (%d/%d)\n",
 107                        ev->mlength, ev->rlength);
 108
 109         spin_lock(&service->srv_lock);
 110         for (index = 0; index < service->srv_ring_length; index++)
 111                 if ( service->srv_buf[index] == ev->mem_desc.start)
 112                         break;
 113
 114         if (index == service->srv_ring_length)
 115                 LBUG();
 116
 117         service->srv_ref_count[index]++;
 118
 119         if (ptl_is_valid_handle(&ev->unlinked_me)) {
 120                 int idx;
 121
 122                 for (idx = 0; idx < service->srv_ring_length; idx++)
 123                         if (service->srv_me_h[idx].handle_idx ==
 124                             ev->unlinked_me.handle_idx)
 125                                 break;
 126                 if (idx == service->srv_ring_length)
 127                         LBUG();
 128
 129                 CDEBUG(D_NET, "unlinked %d\n", idx);
 130                 ptl_set_inv_handle(&(service->srv_me_h[idx]));
 131
 132                 if (service->srv_ref_count[idx] == 0)
 133                         ptlrpc_link_svc_me(service, idx);
 134         }
 135
 136         spin_unlock(&service->srv_lock);
 137         if (ev->type == PTL_EVENT_PUT)
 138                 wake_up(&service->srv_waitq);
 139         else
 140                 CERROR("Unexpected event type: %d\n", ev->type);
 141
 142         return 0;
 143 }
 144
 145 static int bulk_source_callback(ptl_event_t *ev, void *data)
 146 {
 147         struct ptlrpc_bulk_desc *bulk = ev->mem_desc.user_ptr;
 148
 149         ENTRY;
 150
 151         if (ev->type == PTL_EVENT_SENT) {
 152                 CDEBUG(D_NET, "got SENT event\n");
 153         } else if (ev->type == PTL_EVENT_ACK) {
 154                 CDEBUG(D_NET, "got ACK event\n");
 155                 bulk->b_flags = PTL_BULK_SENT;
 156                 wake_up_interruptible(&bulk->b_waitq);
 157         } else {
 158                 CERROR("Unexpected event type!\n");
 159                 LBUG();
 160         }
 161
 162         EXIT;
 163         return 1;
 164 }
 165
 166 static int bulk_sink_callback(ptl_event_t *ev, void *data)
 167 {
 168         struct ptlrpc_bulk_desc *bulk = ev->mem_desc.user_ptr;
 169
 170         ENTRY;
 171
 172         if (ev->type == PTL_EVENT_PUT) {
 173                 if (bulk->b_buf != ev->mem_desc.start + ev->offset)
 174                         CERROR("bulkbuf != mem_desc -- why?\n");
 175                 bulk->b_flags = PTL_BULK_RCVD;
 176                 if (bulk->b_cb != NULL)
 177                         bulk->b_cb(bulk, data);
 178                 wake_up_interruptible(&bulk->b_waitq);
 179         } else {
 180                 CERROR("Unexpected event type!\n");
 181                 LBUG();
 182         }
 183
 184         /* FIXME: This should happen unconditionally */
 185         if (bulk->b_cb != NULL)
 186                 OBD_FREE(bulk, sizeof(*bulk));
 187
 188         EXIT;
 189         return 1;
 190 }
 191
 192 int ptlrpc_init_portals(void)
 193 {
 194         int rc;
 195         ptl_handle_ni_t ni;
 196
 197         socknal_nip = inter_module_get_request("ksocknal_ni", "ksocknal");
 198         qswnal_nip = inter_module_get_request("kqswnal_ni", "kqswnal");
 199         if (socknal_nip == NULL && qswnal_nip == NULL) {
 200                 CERROR("get_ni failed: is a NAL module loaded?\n");
 201                 return -EIO;
 202         }
 203
 204         /* Use the qswnal if it's there */
 205         if (qswnal_nip != NULL)
 206                 ni = *qswnal_nip;
 207         else
 208                 ni = *socknal_nip;
 209
 210         rc = PtlEQAlloc(ni, 128, request_out_callback, NULL, &request_out_eq);
 211         if (rc != PTL_OK)
 212                 CERROR("PtlEQAlloc failed: %d\n", rc);
 213
 214         rc = PtlEQAlloc(ni, 128, reply_out_callback, NULL, &reply_out_eq);
 215         if (rc != PTL_OK)
 216                 CERROR("PtlEQAlloc failed: %d\n", rc);
 217
 218         rc = PtlEQAlloc(ni, 128, reply_in_callback, NULL, &reply_in_eq);
 219         if (rc != PTL_OK)
 220                 CERROR("PtlEQAlloc failed: %d\n", rc);
 221
 222         rc = PtlEQAlloc(ni, 128, bulk_source_callback, NULL, &bulk_source_eq);
 223         if (rc != PTL_OK)
 224                 CERROR("PtlEQAlloc failed: %d\n", rc);
 225
 226         rc = PtlEQAlloc(ni, 128, bulk_sink_callback, NULL, &bulk_sink_eq);
 227         if (rc != PTL_OK)
 228                 CERROR("PtlEQAlloc failed: %d\n", rc);
 229
 230         return rc;
 231 }
 232
 233 void ptlrpc_exit_portals(void)
 234 {
 235         PtlEQFree(request_out_eq);
 236         PtlEQFree(reply_out_eq);
 237         PtlEQFree(reply_in_eq);
 238         PtlEQFree(bulk_source_eq);
 239         PtlEQFree(bulk_sink_eq);
 240
 241         if (qswnal_nip != NULL)
 242                 inter_module_put("kqswnal_ni");
 243         if (socknal_nip != NULL)
 244                 inter_module_put("ksocknal_ni");
 245 }