void
ssvm_delete_memfd (ssvm_private_t * memfd)
{
vec_free (memfd->name);
clib_mem_vm_free (memfd->sh, memfd->ssvm_size);
close (memfd->fd);
}
/**
* Initialize memfd segment slave
*
* 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_get_fd_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 (fd %d)", mapa.fd);
close (memfd->fd);
return SSVM_API_ERROR_MMAP;
}
sh = mapa.addr;
memfd->requested_va = sh->ssvm_va;
memfd->ssvm_size = sh->ssvm_size;
clib_mem_vm_free (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 clib_smp_free (clib_smp_main_t * m)
{
clib_mem_vm_free (m->vm_base, (uword) ((1 + m->n_cpus) << m->log2_n_per_cpu_vm_bytes));
}
