/** * Initialize memfd segment master */ int ssvm_master_init_memfd (ssvm_private_t * memfd) { uword page_size; 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)); alloc.name = (char *) memfd->name; alloc.size = memfd->ssvm_size; alloc.flags = CLIB_MEM_VM_F_SHARED; alloc.requested_va = memfd->requested_va; if ((err = clib_mem_vm_ext_alloc (&alloc))) { clib_error_report (err); return SSVM_API_ERROR_CREATE_FAILURE; } memfd->fd = alloc.fd; memfd->sh = (ssvm_shared_header_t *) alloc.addr; memfd->my_pid = getpid (); memfd->i_am_master = 1; page_size = 1ull << alloc.log2_page_size; sh = memfd->sh; sh->master_pid = memfd->my_pid; sh->ssvm_size = memfd->ssvm_size; sh->ssvm_va = pointer_to_uword (sh); sh->type = SSVM_SEGMENT_MEMFD; #if USE_DLMALLOC == 0 uword flags = MHEAP_FLAG_DISABLE_VM | MHEAP_FLAG_THREAD_SAFE; sh->heap = mheap_alloc_with_flags (((u8 *) sh) + page_size, memfd->ssvm_size - page_size, flags); #else sh->heap = create_mspace_with_base (((u8 *) sh) + page_size, memfd->ssvm_size - page_size, 1 /* locked */ ); mspace_disable_expand (sh->heap); #endif oldheap = ssvm_push_heap (sh); sh->name = format (0, "%s", memfd->name, 0); ssvm_pop_heap (oldheap); /* The application has to set set sh->ready... */ return 0; }
int ssvm_eth_create (ssvm_eth_main_t * em, u8 * name, int is_master) { // ssvm_eth_main_t * em = &ssvm_eth_main; ssvm_private_t * intfc; void * oldheap; clib_error_t * e; unix_shared_memory_queue_t * q; ssvm_shared_header_t * sh; ssvm_eth_queue_elt_t * elts; u32 * elt_indices; u8 enet_addr[6]; int i, rv; vec_add2 (em->intfcs, intfc, 1); intfc->ssvm_size = em->segment_size; intfc->i_am_master = 1; intfc->name = name; intfc->my_pid = getpid(); if (is_master == 0) { rv = ssvm_slave_init (intfc, 20 /* timeout in seconds */); if (rv < 0) return rv; goto create_vnet_interface; } intfc->requested_va = em->next_base_va; em->next_base_va += em->segment_size; rv = ssvm_master_init (intfc, intfc - em->intfcs /* master index */); if (rv < 0) return rv; /* OK, segment created, set up queues and so forth. */ sh = intfc->sh; oldheap = ssvm_push_heap (sh); q = unix_shared_memory_queue_init (em->queue_elts, sizeof (u32), 0 /* consumer pid not interesting */, 0 /* signal not sent */); sh->opaque [TO_MASTER_Q_INDEX] = (void *)q; q = unix_shared_memory_queue_init (em->queue_elts, sizeof (u32), 0 /* consumer pid not interesting */, 0 /* signal not sent */); sh->opaque [TO_SLAVE_Q_INDEX] = (void *)q; /* * Preallocate the requested number of buffer chunks * There must be a better way to do this, etc. * Add some slop to avoid pool reallocation, which will not go well */ elts = 0; elt_indices = 0; vec_validate_aligned (elts, em->nbuffers - 1, CLIB_CACHE_LINE_BYTES); vec_validate_aligned (elt_indices, em->nbuffers - 1, CLIB_CACHE_LINE_BYTES); for (i = 0; i < em->nbuffers; i++) elt_indices[i] = i; sh->opaque [CHUNK_POOL_INDEX] = (void *) elts; sh->opaque [CHUNK_POOL_FREELIST_INDEX] = (void *) elt_indices; sh->opaque [CHUNK_POOL_NFREE] = (void *)(uword) em->nbuffers; ssvm_pop_heap (oldheap); create_vnet_interface: sh = intfc->sh; memset (enet_addr, 0, sizeof (enet_addr)); enet_addr[0] = 2; enet_addr[1] = 0xFE; enet_addr[2] = is_master; enet_addr[5] = sh->master_index; /* Let the games begin... */ if (is_master) sh->ready = 1; return 0; }
int ssvm_master_init_shm (ssvm_private_t * ssvm) { int ssvm_fd; #if USE_DLMALLOC == 0 int mh_flags = MHEAP_FLAG_DISABLE_VM | MHEAP_FLAG_THREAD_SAFE; #endif clib_mem_vm_map_t mapa = { 0 }; u8 junk = 0, *ssvm_filename; ssvm_shared_header_t *sh; uword page_size, requested_va = 0; void *oldheap; if (ssvm->ssvm_size == 0) return SSVM_API_ERROR_NO_SIZE; if (CLIB_DEBUG > 1) clib_warning ("[%d] creating segment '%s'", getpid (), ssvm->name); ASSERT (vec_c_string_is_terminated (ssvm->name)); ssvm_filename = format (0, "/dev/shm/%s%c", ssvm->name, 0); unlink ((char *) ssvm_filename); vec_free (ssvm_filename); ssvm_fd = shm_open ((char *) ssvm->name, O_RDWR | O_CREAT | O_EXCL, 0777); if (ssvm_fd < 0) { clib_unix_warning ("create segment '%s'", ssvm->name); return SSVM_API_ERROR_CREATE_FAILURE; } if (fchmod (ssvm_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP) < 0) clib_unix_warning ("ssvm segment chmod"); if (svm_get_root_rp ()) { /* TODO: is this really needed? */ svm_main_region_t *smr = svm_get_root_rp ()->data_base; if (fchown (ssvm_fd, smr->uid, smr->gid) < 0) clib_unix_warning ("ssvm segment chown"); } if (lseek (ssvm_fd, ssvm->ssvm_size, SEEK_SET) < 0) { clib_unix_warning ("lseek"); close (ssvm_fd); return SSVM_API_ERROR_SET_SIZE; } if (write (ssvm_fd, &junk, 1) != 1) { clib_unix_warning ("set ssvm size"); close (ssvm_fd); return SSVM_API_ERROR_SET_SIZE; } page_size = clib_mem_get_fd_page_size (ssvm_fd); if (ssvm->requested_va) { requested_va = ssvm->requested_va; clib_mem_vm_randomize_va (&requested_va, min_log2 (page_size)); } mapa.requested_va = requested_va; mapa.size = ssvm->ssvm_size; mapa.fd = ssvm_fd; if (clib_mem_vm_ext_map (&mapa)) { clib_unix_warning ("mmap"); close (ssvm_fd); return SSVM_API_ERROR_MMAP; } close (ssvm_fd); sh = mapa.addr; sh->master_pid = ssvm->my_pid; sh->ssvm_size = ssvm->ssvm_size; sh->ssvm_va = pointer_to_uword (sh); sh->type = SSVM_SEGMENT_SHM; #if USE_DLMALLOC == 0 sh->heap = mheap_alloc_with_flags (((u8 *) sh) + page_size, ssvm->ssvm_size - page_size, mh_flags); #else sh->heap = create_mspace_with_base (((u8 *) sh) + page_size, ssvm->ssvm_size - page_size, 1 /* locked */ ); mspace_disable_expand (sh->heap); #endif oldheap = ssvm_push_heap (sh); sh->name = format (0, "%s", ssvm->name, 0); ssvm_pop_heap (oldheap); ssvm->sh = sh; ssvm->my_pid = getpid (); ssvm->i_am_master = 1; /* The application has to set set sh->ready... */ return 0; }