* See the License for the specific language governing permissions and
* limitations under the License.
*/
-#include "ssvm.h"
-#include "svm_common.h"
+#include <svm/ssvm.h>
+#include <svm/svm_common.h>
int
ssvm_master_init (ssvm_private_t * ssvm, u32 master_index)
munmap ((void *) ssvm->requested_va, ssvm->ssvm_size);
}
+int
+ssvm_master_init_memfd (ssvm_private_t * memfd, u32 master_index)
+{
+ uword page_size, flags = MHEAP_FLAG_DISABLE_VM | MHEAP_FLAG_THREAD_SAFE;
+ ssvm_shared_header_t *sh;
+ void *oldheap;
+ clib_mem_vm_alloc_t alloc = { 0 };
+ clib_error_t *err;
+
+ if (memfd->ssvm_size == 0)
+ return SSVM_API_ERROR_NO_SIZE;
+
+ ASSERT (vec_c_string_is_terminated (memfd->name));
+ memfd->name = format (0, "memfd svm region %d%c", master_index, 0);
+
+ alloc.name = (char *) memfd->name;
+ alloc.size = memfd->ssvm_size;
+ alloc.flags = CLIB_MEM_VM_F_SHARED;
+ if ((err = clib_mem_vm_ext_alloc (&alloc)))
+ {
+ clib_error_report (err);
+ return SSVM_API_ERROR_CREATE_FAILURE;
+ }
+
+ memfd->fd = alloc.fd;
+ memfd->sh = alloc.addr;
+ memfd->my_pid = getpid ();
+ memfd->i_am_master = 1;
+
+ page_size = 1 << alloc.log2_page_size;
+ sh = (ssvm_shared_header_t *) memfd->sh;
+ sh->master_pid = memfd->my_pid;
+ sh->ssvm_size = memfd->ssvm_size;
+ sh->heap = mheap_alloc_with_flags (((u8 *) sh) + page_size,
+ memfd->ssvm_size - page_size, flags);
+ sh->ssvm_va = pointer_to_uword (sh);
+ sh->master_index = master_index;
+
+ oldheap = ssvm_push_heap (sh);
+ sh->name = format (0, "%s%c", memfd->name, 0);
+ ssvm_pop_heap (oldheap);
+
+ /* The application has to set set sh->ready... */
+ return 0;
+}
+
+/*
+ * Subtly different than svm_slave_init. The caller
+ * needs to acquire a usable file descriptor for the memfd segment
+ * e.g. via vppinfra/socket.c:default_socket_recvmsg
+ */
+
+int
+ssvm_slave_init_memfd (ssvm_private_t * memfd)
+{
+ clib_mem_vm_map_t mapa = { 0 };
+ ssvm_shared_header_t *sh;
+ uword page_size;
+
+ memfd->i_am_master = 0;
+
+ page_size = clib_mem_vm_get_page_size (memfd->fd);
+ if (!page_size)
+ {
+ clib_unix_warning ("page size unknown");
+ return SSVM_API_ERROR_MMAP;
+ }
+
+ /*
+ * Map the segment once, to look at the shared header
+ */
+ mapa.fd = memfd->fd;
+ mapa.size = page_size;
+
+ if (clib_mem_vm_ext_map (&mapa))
+ {
+ clib_unix_warning ("slave research mmap");
+ close (memfd->fd);
+ return SSVM_API_ERROR_MMAP;
+ }
+
+ sh = mapa.addr;
+ memfd->requested_va = sh->ssvm_va;
+ memfd->ssvm_size = sh->ssvm_size;
+ munmap (sh, page_size);
+
+ /*
+ * Remap the segment at the 'right' address
+ */
+ mapa.requested_va = memfd->requested_va;
+ mapa.size = memfd->ssvm_size;
+ if (clib_mem_vm_ext_map (&mapa))
+ {
+ clib_unix_warning ("slave final mmap");
+ close (memfd->fd);
+ return SSVM_API_ERROR_MMAP;
+ }
+
+ sh = mapa.addr;
+ sh->slave_pid = getpid ();
+ memfd->sh = sh;
+ return 0;
+}
+
+void
+ssvm_delete_memfd (ssvm_private_t * memfd)
+{
+ vec_free (memfd->name);
+ clib_mem_vm_free (memfd->sh, memfd->ssvm_size);
+ close (memfd->fd);
+}
/*
* fd.io coding-style-patch-verification: ON