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/*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <assert.h>
#include <errno.h>
#include <sys/mman.h>
#include "private.h"
static int all_restrict_cb(Xentoolcore__Active_Handle *ah, domid_t domid) {
xenforeignmemory_handle *fmem = CONTAINER_OF(ah, *fmem, tc_ah);
if (fmem->fd < 0)
/* just in case */
return 0;
return xenforeignmemory_restrict(fmem, domid);
}
xenforeignmemory_handle *xenforeignmemory_open(xentoollog_logger *logger,
unsigned open_flags)
{
xenforeignmemory_handle *fmem = malloc(sizeof(*fmem));
int rc;
if (!fmem) return NULL;
fmem->fd = -1;
fmem->logger = logger;
fmem->logger_tofree = NULL;
fmem->tc_ah.restrict_callback = all_restrict_cb;
xentoolcore__register_active_handle(&fmem->tc_ah);
if (!fmem->logger) {
fmem->logger = fmem->logger_tofree =
(xentoollog_logger*)
xtl_createlogger_stdiostream(stderr, XTL_PROGRESS, 0);
if (!fmem->logger) goto err;
}
rc = osdep_xenforeignmemory_open(fmem);
if ( rc < 0 ) goto err;
return fmem;
err:
xentoolcore__deregister_active_handle(&fmem->tc_ah);
osdep_xenforeignmemory_close(fmem);
xtl_logger_destroy(fmem->logger_tofree);
free(fmem);
return NULL;
}
int xenforeignmemory_close(xenforeignmemory_handle *fmem)
{
int rc;
if ( !fmem )
return 0;
xentoolcore__deregister_active_handle(&fmem->tc_ah);
rc = osdep_xenforeignmemory_close(fmem);
xtl_logger_destroy(fmem->logger_tofree);
free(fmem);
return rc;
}
void *xenforeignmemory_map2(xenforeignmemory_handle *fmem,
uint32_t dom, void *addr,
int prot, int flags, size_t num,
const xen_pfn_t arr[/*num*/], int err[/*num*/])
{
void *ret;
int *err_to_free = NULL;
if ( err == NULL )
err = err_to_free = malloc(num * sizeof(int));
if ( err == NULL )
return NULL;
ret = osdep_xenforeignmemory_map(fmem, dom, addr, prot, flags, num, arr, err);
if ( ret && err_to_free )
{
int i;
for ( i = 0 ; i < num ; i++ )
{
if ( err[i] )
{
errno = -err[i];
(void)osdep_xenforeignmemory_unmap(fmem, ret, num);
ret = NULL;
break;
}
}
}
free(err_to_free);
return ret;
}
void *xenforeignmemory_map(xenforeignmemory_handle *fmem,
uint32_t dom, int prot,
size_t num,
const xen_pfn_t arr[/*num*/], int err[/*num*/])
{
return xenforeignmemory_map2(fmem, dom, NULL, prot, 0, num, arr, err);
}
int xenforeignmemory_unmap(xenforeignmemory_handle *fmem,
void *addr, size_t num)
{
return osdep_xenforeignmemory_unmap(fmem, addr, num);
}
int xenforeignmemory_restrict(xenforeignmemory_handle *fmem,
domid_t domid)
{
return osdep_xenforeignmemory_restrict(fmem, domid);
}
xenforeignmemory_resource_handle *xenforeignmemory_map_resource(
xenforeignmemory_handle *fmem, domid_t domid, unsigned int type,
unsigned int id, unsigned long frame, unsigned long nr_frames,
void **paddr, int prot, int flags)
{
xenforeignmemory_resource_handle *fres;
int rc;
/* Check flags only contains POSIX defined values */
if ( flags & ~(MAP_SHARED | MAP_PRIVATE) )
{
errno = EINVAL;
return NULL;
}
fres = calloc(1, sizeof(*fres));
if ( !fres )
{
errno = ENOMEM;
return NULL;
}
fres->domid = domid;
fres->type = type;
fres->id = id;
fres->frame = frame;
fres->nr_frames = nr_frames;
fres->addr = *paddr;
fres->prot = prot;
fres->flags = flags;
rc = osdep_xenforeignmemory_map_resource(fmem, fres);
if ( rc )
{
free(fres);
fres = NULL;
} else
*paddr = fres->addr;
return fres;
}
int xenforeignmemory_unmap_resource(
xenforeignmemory_handle *fmem, xenforeignmemory_resource_handle *fres)
{
int rc = osdep_xenforeignmemory_unmap_resource(fmem, fres);
free(fres);
return rc;
}
int xenforeignmemory_resource_size(
xenforeignmemory_handle *fmem, domid_t domid, unsigned int type,
unsigned int id, size_t *size)
{
xenforeignmemory_resource_handle fres = {
.domid = domid,
.type = type,
.id = id,
};
int rc = osdep_xenforeignmemory_map_resource(fmem, &fres);
if ( rc )
return rc;
*size = fres.nr_frames << XC_PAGE_SHIFT;
return 0;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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