src/store_swapin.cc

   1
   2 /*
   3  * $Id: store_swapin.cc,v 1.23 2000/05/03 17:15:44 adrian Exp $
   4  *
   5  * DEBUG: section 20    Storage Manager Swapin Functions
   6  * AUTHOR: Duane Wessels
   7  *
   8  * SQUID Internet Object Cache  http://squid.nlanr.net/Squid/
   9  * ----------------------------------------------------------
  10  *
  11  *  Squid is the result of efforts by numerous individuals from the
  12  *  Internet community.  Development is led by Duane Wessels of the
  13  *  National Laboratory for Applied Network Research and funded by the
  14  *  National Science Foundation.  Squid is Copyrighted (C) 1998 by
  15  *  the Regents of the University of California.  Please see the
  16  *  COPYRIGHT file for full details.  Squid incorporates software
  17  *  developed and/or copyrighted by other sources.  Please see the
  18  *  CREDITS file for full details.
  19  *
  20  *  This program is free software; you can redistribute it and/or modify
  21  *  it under the terms of the GNU General Public License as published by
  22  *  the Free Software Foundation; either version 2 of the License, or
  23  *  (at your option) any later version.
  24  *
  25  *  This program is distributed in the hope that it will be useful,
  26  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  27  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28  *  GNU General Public License for more details.
  29  *
  30  *  You should have received a copy of the GNU General Public License
  31  *  along with this program; if not, write to the Free Software
  32  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  33  *
  34  */
  35
  36 #include "squid.h"
  37
  38 static STIOCB storeSwapInFileClosed;
  39 static STFNCB storeSwapInFileNotify;
  40
  41 void
  42 storeSwapInStart(store_client * sc)
  43 {
  44     StoreEntry *e = sc->entry;
  45     assert(e->mem_status == NOT_IN_MEMORY);
  46     if (!EBIT_TEST(e->flags, ENTRY_VALIDATED)) {
  47         /* We're still reloading and haven't validated this entry yet */
  48         return;
  49     }
  50     debug(20, 3) ("storeSwapInStart: called for %d %08X %s \n",
  51         e->swap_dirn, e->swap_filen, storeKeyText(e->key));
  52     if (e->swap_status != SWAPOUT_WRITING && e->swap_status != SWAPOUT_DONE) {
  53         debug(20, 1) ("storeSwapInStart: bad swap_status (%s)\n",
  54             swapStatusStr[e->swap_status]);
  55         return;
  56     }
  57     if (e->swap_filen < 0) {
  58         debug(20, 1) ("storeSwapInStart: swap_filen < 0\n");
  59         return;
  60     }
  61     assert(e->mem_obj != NULL);
  62     debug(20, 3) ("storeSwapInStart: Opening fileno %08X\n",
  63         e->swap_filen);
  64     sc->swapin_sio = storeOpen(e, storeSwapInFileNotify, storeSwapInFileClosed,
  65       sc);
  66     cbdataLock(sc->swapin_sio);
  67 }
  68
  69 static void
  70 storeSwapInFileClosed(void *data, int errflag, storeIOState * sio)
  71 {
  72     store_client *sc = data;
  73     STCB *callback;
  74     debug(20, 3) ("storeSwapInFileClosed: sio=%p, errflag=%d\n",
  75         sio, errflag);
  76     cbdataUnlock(sio);
  77     sc->swapin_sio = NULL;
  78     if ((callback = sc->callback)) {
  79         assert(errflag <= 0);
  80         sc->callback = NULL;
  81         callback(sc->callback_data, sc->copy_buf, errflag);
  82     }
  83 }
  84
  85 static void
  86 storeSwapInFileNotify(void *data, int errflag, storeIOState * sio)
  87 {
  88   store_client *sc = data;
  89   StoreEntry *e = sc->entry;
  90
  91   debug(1, 3) ("storeSwapInFileNotify: changing %d/%d to %d/%d\n", e->swap_filen, e->swap_dirn, sio->swap_filen, sio->swap_dirn);
  92
  93   e->swap_filen = sio->swap_filen;
  94   e->swap_dirn = sio->swap_dirn;
  95 }