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/******************************************************************************
*
* Copyright (c) 2009 Citrix (R&D) Inc. (Grzegorz Milos)
*
* 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
* (at your option) any later version.
*
* 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
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string.h>
#include "memshr-priv.h"
#include "shm.h"
typedef struct {
int enabled;
domid_t domid;
} memshr_vbd_info_t;
memshr_vbd_info_t vbd_info = {0, DOMID_INVALID};
typedef struct {
struct shared_memshr_info *shared_info;
struct fgprtshr_hash *fgprts;
struct blockshr_hash *blks;
} private_memshr_info_t;
private_memshr_info_t memshr;
#define SHARED_INFO (memshr.shared_info)
void memshr_set_domid(int domid)
{
vbd_info.domid = domid;
}
void memshr_daemon_initialize(void)
{
void *shm_base_addr;
struct fgprtshr_hash *h;
memset(&memshr, 0, sizeof(private_memshr_info_t));
if((SHARED_INFO = shm_shared_info_open(1)) == NULL)
{
DPRINTF("Failed to init shared info.\n");
return;
}
if((memshr.fgprts = shm_fgprtshr_hash_open(1)) == NULL)
{
DPRINTF("Failed to init fgprtshr hash.\n");
return;
}
memshr.shared_info->fgprtshr_hash_inited = 1;
if((memshr.blks = shm_blockshr_hash_open(1)) == NULL)
{
DPRINTF("Failed to init blockshr hash.\n");
return;
}
memshr.shared_info->blockshr_hash_inited = 1;
}
void memshr_vbd_initialize(void)
{
memset(&memshr, 0, sizeof(private_memshr_info_t));
if((SHARED_INFO = shm_shared_info_open(0)) == NULL)
{
DPRINTF("Failed to open shared info.\n");
return;
}
if(!SHARED_INFO->fgprtshr_hash_inited)
{
DPRINTF("fgprtshr hash not inited.\n");
return;
}
if((memshr.fgprts = shm_fgprtshr_hash_open(0)) == NULL)
{
DPRINTF("Failed to open fgprtshr_hash.\n");
return;
}
if((memshr.blks = shm_blockshr_hash_open(0)) == NULL)
{
DPRINTF("Failed to open blockshr_hash.\n");
return;
}
if(vbd_info.domid == DOMID_INVALID)
return;
vbd_info.enabled = 1;
}
uint16_t memshr_vbd_image_get(char* file)
{
uint16_t id;
if(pthread_mutex_lock(&SHARED_INFO->lock)) goto error_out;
id = shm_vbd_image_get(file, SHARED_INFO->vbd_images);
if(pthread_mutex_unlock(&SHARED_INFO->lock)) goto error_out;
return id;
error_out:
return 0;
}
void memshr_vbd_image_put(uint16_t memshr_id)
{
if(pthread_mutex_lock(&SHARED_INFO->lock)) return;
shm_vbd_image_put(memshr_id, SHARED_INFO->vbd_images);
if(pthread_mutex_unlock(&SHARED_INFO->lock)) return;
}
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