mirror of
https://github.com/xen-project/xen.git
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Igor Druzhinin
143e0c2c2d
The new function repeats the behavior of the first version except it has an extended list of arguments which are subsequently passed to mmap() call. This is needed for QEMU depriviledging. Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com>
132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <assert.h>
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#include <errno.h>
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#include "private.h"
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xenforeignmemory_handle *xenforeignmemory_open(xentoollog_logger *logger,
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unsigned open_flags)
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{
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xenforeignmemory_handle *fmem = malloc(sizeof(*fmem));
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int rc;
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if (!fmem) return NULL;
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fmem->fd = -1;
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fmem->logger = logger;
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fmem->logger_tofree = NULL;
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if (!fmem->logger) {
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fmem->logger = fmem->logger_tofree =
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(xentoollog_logger*)
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xtl_createlogger_stdiostream(stderr, XTL_PROGRESS, 0);
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if (!fmem->logger) goto err;
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}
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rc = osdep_xenforeignmemory_open(fmem);
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if ( rc < 0 ) goto err;
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return fmem;
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err:
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osdep_xenforeignmemory_close(fmem);
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xtl_logger_destroy(fmem->logger_tofree);
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free(fmem);
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return NULL;
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}
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int xenforeignmemory_close(xenforeignmemory_handle *fmem)
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{
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int rc;
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if ( !fmem )
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return 0;
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rc = osdep_xenforeignmemory_close(fmem);
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xtl_logger_destroy(fmem->logger_tofree);
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free(fmem);
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return rc;
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}
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void *xenforeignmemory_map2(xenforeignmemory_handle *fmem,
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uint32_t dom, void *addr,
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int prot, int flags, size_t num,
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const xen_pfn_t arr[/*num*/], int err[/*num*/])
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{
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void *ret;
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int *err_to_free = NULL;
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if ( err == NULL )
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err = err_to_free = malloc(num * sizeof(int));
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if ( err == NULL )
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return NULL;
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ret = osdep_xenforeignmemory_map(fmem, dom, addr, prot, flags, num, arr, err);
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if ( ret && err_to_free )
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{
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int i;
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for ( i = 0 ; i < num ; i++ )
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{
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if ( err[i] )
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{
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errno = -err[i];
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(void)osdep_xenforeignmemory_unmap(fmem, ret, num);
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ret = NULL;
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break;
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}
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}
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}
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free(err_to_free);
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return ret;
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}
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void *xenforeignmemory_map(xenforeignmemory_handle *fmem,
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uint32_t dom, int prot,
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size_t num,
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const xen_pfn_t arr[/*num*/], int err[/*num*/])
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{
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return xenforeignmemory_map2(fmem, dom, NULL, prot, 0, num, arr, err);
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}
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int xenforeignmemory_unmap(xenforeignmemory_handle *fmem,
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void *addr, size_t num)
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{
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return osdep_xenforeignmemory_unmap(fmem, addr, num);
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}
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int xenforeignmemory_restrict(xenforeignmemory_handle *fmem,
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domid_t domid)
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{
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return osdep_xenforeignmemory_restrict(fmem, domid);
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}
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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