Document the 'carp' cache_peer option

[thirdparty/squid.git] / src / store_swapin.cc

/*
 * $Id: store_swapin.cc,v 1.34 2003/01/23 00:37:27 robertc Exp $
 *
 * DEBUG: section 20    Storage Manager Swapin Functions
 * AUTHOR: Duane Wessels
 *
 * SQUID Web Proxy Cache          http://www.squid-cache.org/
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 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
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 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *
 */

#include "squid.h"
#include "StoreClient.h"
#include "Store.h"

static STIOCB storeSwapInFileClosed;
static STFNCB storeSwapInFileNotify;

void
storeSwapInStart(store_client * sc)
{
    StoreEntry *e = sc->entry;
    assert(e->mem_status == NOT_IN_MEMORY);
    if (!EBIT_TEST(e->flags, ENTRY_VALIDATED)) {
	/* We're still reloading and haven't validated this entry yet */
	return;
    }
    debug(20, 3) ("storeSwapInStart: called for %d %08X %s \n",
	e->swap_dirn, e->swap_filen, e->getMD5Text());
    if (e->swap_status != SWAPOUT_WRITING && e->swap_status != SWAPOUT_DONE) {
	debug(20, 1) ("storeSwapInStart: bad swap_status (%s)\n",
	    swapStatusStr[e->swap_status]);
	return;
    }
    if (e->swap_filen < 0) {
	debug(20, 1) ("storeSwapInStart: swap_filen < 0\n");
	return;
    }
    assert(e->mem_obj != NULL);
    debug(20, 3) ("storeSwapInStart: Opening fileno %08X\n",
	e->swap_filen);
    sc->swapin_sio = storeOpen(e, storeSwapInFileNotify, storeSwapInFileClosed, sc);
}

static void
storeSwapInFileClosed(void *data, int errflag, storeIOState * sio)
{
    store_client *sc = (store_client *)data;
    debug(20, 3) ("storeSwapInFileClosed: sio=%p, errflag=%d\n",
	sio, errflag);
    sc->swapin_sio = NULL;
    /* why this assert */
    if (sc->callbackPending()) {
	assert (errflag <= 0);
        sc->callback(0, errflag ? true : false);
    }
    statCounter.swap.ins++;
}

static void
storeSwapInFileNotify(void *data, int errflag, storeIOState * sio)
{
    store_client *sc = (store_client *)data;
    StoreEntry *e = sc->entry;

    debug(1, 3) ("storeSwapInFileNotify: changing %d/%d to %d/%d\n", e->swap_filen, e->swap_dirn, sio->swap_filen, sio->swap_dirn);

    e->swap_filen = sio->swap_filen;
    e->swap_dirn = sio->swap_dirn;
}