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 *rpc = ev->mem_desc.user_ptr;
  73         ENTRY;
  74
  75         if (ev->type == PTL_EVENT_PUT) {
  76                 rpc->rq_repmsg = ev->mem_desc.start + ev->offset;
  77                 barrier();
  78                 wake_up_interruptible(&rpc->rq_wait_for_rep);
  79         } else {
  80                 // XXX make sure we understand all events, including ACK's
  81                 CERROR("Unknown event %d\n", ev->type);
  82                 LBUG();
  83         }
  84
  85         RETURN(1);
  86 }
  87
  88 int request_in_callback(ptl_event_t *ev)
  89 {
  90         struct ptlrpc_service *service = ev->mem_desc.user_ptr;
  91         int index;
  92
  93         if (ev->rlength != ev->mlength)
  94                 CERROR("Warning: Possibly truncated rpc (%d/%d)\n",
  95                        ev->mlength, ev->rlength);
  96
  97         spin_lock(&service->srv_lock);
  98         for (index = 0; index < service->srv_ring_length; index++)
  99                 if ( service->srv_buf[index] == ev->mem_desc.start)
 100                         break;
 101
 102         if (index == service->srv_ring_length)
 103                 LBUG();
 104
 105         service->srv_ref_count[index]++;
 106
 107         if (ptl_is_valid_handle(&ev->unlinked_me)) {
 108                 int idx;
 109
 110                 for (idx = 0; idx < service->srv_ring_length; idx++)
 111                         if (service->srv_me_h[idx].handle_idx ==
 112                             ev->unlinked_me.handle_idx)
 113                                 break;
 114                 if (idx == service->srv_ring_length)
 115                         LBUG();
 116
 117                 CDEBUG(D_NET, "unlinked %d\n", idx);
 118                 ptl_set_inv_handle(&(service->srv_me_h[idx]));
 119
 120                 if (service->srv_ref_count[idx] == 0)
 121                         ptlrpc_link_svc_me(service, idx);
 122         }
 123
 124         spin_unlock(&service->srv_lock);
 125         if (ev->type == PTL_EVENT_PUT)
 126                 wake_up(&service->srv_waitq);
 127         else
 128                 CERROR("Unexpected event type: %d\n", ev->type);
 129
 130         return 0;
 131 }
 132
 133 static int bulk_source_callback(ptl_event_t *ev)
 134 {
 135         struct ptlrpc_bulk_page *bulk = ev->mem_desc.user_ptr;
 136         struct ptlrpc_bulk_desc *desc = bulk->b_desc;
 137         ENTRY;
 138
 139         if (ev->type == PTL_EVENT_SENT) {
 140                 CDEBUG(D_NET, "got SENT event\n");
 141         } else if (ev->type == PTL_EVENT_ACK) {
 142                 CDEBUG(D_NET, "got ACK event\n");
 143                 if (bulk->b_cb != NULL)
 144                         bulk->b_cb(bulk);
 145                 if (atomic_dec_and_test(&desc->b_finished_count)) {
 146                         desc->b_flags |= PTL_BULK_FL_SENT;
 147                         wake_up_interruptible(&desc->b_waitq);
 148                         if (desc->b_cb != NULL)
 149                                 desc->b_cb(desc, desc->b_cb_data);
 150                 }
 151         } else {
 152                 CERROR("Unexpected event type!\n");
 153                 LBUG();
 154         }
 155
 156         RETURN(1);
 157 }
 158
 159 static int bulk_sink_callback(ptl_event_t *ev)
 160 {
 161         struct ptlrpc_bulk_page *bulk = ev->mem_desc.user_ptr;
 162         struct ptlrpc_bulk_desc *desc = bulk->b_desc;
 163         ENTRY;
 164
 165         if (ev->type == PTL_EVENT_PUT) {
 166                 if (bulk->b_buf != ev->mem_desc.start + ev->offset)
 167                         CERROR("bulkbuf != mem_desc -- why?\n");
 168                 if (bulk->b_cb != NULL)
 169                         bulk->b_cb(bulk);
 170                 if (atomic_dec_and_test(&desc->b_finished_count)) {
 171                         desc->b_flags |= PTL_BULK_FL_RCVD;
 172                         wake_up_interruptible(&desc->b_waitq);
 173                         if (desc->b_cb != NULL)
 174                                 desc->b_cb(desc, desc->b_cb_data);
 175                 }
 176         } else {
 177                 CERROR("Unexpected event type!\n");
 178                 LBUG();
 179         }
 180
 181         RETURN(1);
 182 }
 183
 184 int ptlrpc_init_portals(void)
 185 {
 186         int rc;
 187         ptl_handle_ni_t ni;
 188
 189         socknal_nip = inter_module_get_request("ksocknal_ni", "ksocknal");
 190         qswnal_nip = inter_module_get_request("kqswnal_ni", "kqswnal");
 191         if (socknal_nip == NULL && qswnal_nip == NULL) {
 192                 CERROR("get_ni failed: is a NAL module loaded?\n");
 193                 return -EIO;
 194         }
 195
 196         /* Use the qswnal if it's there */
 197         if (qswnal_nip != NULL)
 198                 ni = *qswnal_nip;
 199         else
 200                 ni = *socknal_nip;
 201
 202         rc = PtlEQAlloc(ni, 128, request_out_callback, &request_out_eq);
 203         if (rc != PTL_OK)
 204                 CERROR("PtlEQAlloc failed: %d\n", rc);
 205
 206         rc = PtlEQAlloc(ni, 128, reply_out_callback, &reply_out_eq);
 207         if (rc != PTL_OK)
 208                 CERROR("PtlEQAlloc failed: %d\n", rc);
 209
 210         rc = PtlEQAlloc(ni, 128, reply_in_callback, &reply_in_eq);
 211         if (rc != PTL_OK)
 212                 CERROR("PtlEQAlloc failed: %d\n", rc);
 213
 214         rc = PtlEQAlloc(ni, 128, bulk_source_callback, &bulk_source_eq);
 215         if (rc != PTL_OK)
 216                 CERROR("PtlEQAlloc failed: %d\n", rc);
 217
 218         rc = PtlEQAlloc(ni, 128, bulk_sink_callback, &bulk_sink_eq);
 219         if (rc != PTL_OK)
 220                 CERROR("PtlEQAlloc failed: %d\n", rc);
 221
 222         return rc;
 223 }
 224
 225 void ptlrpc_exit_portals(void)
 226 {
 227         PtlEQFree(request_out_eq);
 228         PtlEQFree(reply_out_eq);
 229         PtlEQFree(reply_in_eq);
 230         PtlEQFree(bulk_source_eq);
 231         PtlEQFree(bulk_sink_eq);
 232
 233         if (qswnal_nip != NULL)
 234                 inter_module_put("kqswnal_ni");
 235         if (socknal_nip != NULL)
 236                 inter_module_put("ksocknal_ni");
 237 }