From e86a8edd3c14fb41ace2a12efd17bc7772bf623f Mon Sep 17 00:00:00 2001 From: Florin Coras Date: Fri, 5 Jan 2018 03:20:25 -0800 Subject: api: refactor vlibmemory - separate client/server code for both memory and socket apis - separate memory api code from generic vlib api code - move unix_shared_memory_fifo to svm and rename to svm_fifo_t - overall declutter Change-Id: I90cdd98ff74d0787d58825b914b0f1eafcfa4dc2 Signed-off-by: Florin Coras --- src/vlibmemory/memory_shared.h | 138 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 138 insertions(+) create mode 100644 src/vlibmemory/memory_shared.h (limited to 'src/vlibmemory/memory_shared.h') diff --git a/src/vlibmemory/memory_shared.h b/src/vlibmemory/memory_shared.h new file mode 100644 index 00000000000..f60224a1815 --- /dev/null +++ b/src/vlibmemory/memory_shared.h @@ -0,0 +1,138 @@ +/* + *------------------------------------------------------------------ + * Copyright (c) 2018 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + *------------------------------------------------------------------ + */ + +#ifndef SRC_VLIBMEMORY_MEMORY_SHARED_H_ +#define SRC_VLIBMEMORY_MEMORY_SHARED_H_ + +#include +#include + +/* Allocated in shared memory */ + +/* + * Ring-allocation scheme for client API messages + * + * Only one proc/thread has control of a given message buffer. + * To free a buffer allocated from one of these rings, we clear + * a field in the buffer (header), and leave. + * + * No locks, no hits, no errors... + */ +typedef struct ring_alloc_ +{ + svm_queue_t *rp; + u16 size; + u16 nitems; + u32 hits; + u32 misses; +} ring_alloc_t; + +typedef enum +{ + VL_API_VLIB_RING, + VL_API_CLIENT_RING, + VL_API_QUEUE +} vl_api_shm_config_type_t; + +typedef struct vl_api_shm_elem_config_ +{ + u8 type; + u8 _pad; + u16 count; + u32 size; +} vl_api_shm_elem_config_t; + +STATIC_ASSERT (sizeof (vl_api_shm_elem_config_t) == 8, + "Size must be exactly 8 bytes"); + +/* + * Initializers for the (shared-memory) rings + * _(size, n). Note: each msg has space for a header. + */ +#define foreach_vl_aring_size \ +_(64+sizeof(ring_alloc_t), 1024) \ +_(256+sizeof(ring_alloc_t), 128) \ +_(1024+sizeof(ring_alloc_t), 64) + +#define foreach_clnt_aring_size \ + _(1024+sizeof(ring_alloc_t), 1024) \ + _(2048+sizeof(ring_alloc_t), 128) \ + _(4096+sizeof(ring_alloc_t), 8) + +typedef struct vl_shmem_hdr_ +{ + int version; + + /* getpid () for the VLIB client process */ + volatile int vl_pid; + + /* Client sends VLIB msgs here. */ + svm_queue_t *vl_input_queue; + + /* Vector of rings; one for each size. */ + + /* VLIB allocates buffers to send msgs to clients here. */ + ring_alloc_t *vl_rings; + + /* Clients allocate buffer to send msgs to VLIB here. */ + ring_alloc_t *client_rings; + + /* Number of detected application restarts */ + u32 application_restarts; + + /* Number of messages reclaimed during application restart */ + u32 restart_reclaims; + + /* Number of garbage-collected messages */ + u32 garbage_collects; +} vl_shmem_hdr_t; + +#define VL_SHM_VERSION 2 +#define VL_API_EPOCH_MASK 0xFF +#define VL_API_EPOCH_SHIFT 8 + +void *vl_msg_api_alloc (int nbytes); +void *vl_msg_api_alloc_or_null (int nbytes); +void *vl_msg_api_alloc_as_if_client (int nbytes); +void *vl_msg_api_alloc_as_if_client_or_null (int nbytes); +void vl_msg_api_free (void *a); +int vl_map_shmem (const char *region_name, int is_vlib); +void vl_unmap_shmem (void); +void vl_register_mapped_shmem_region (svm_region_t * rp); +void vl_msg_api_send_shmem (svm_queue_t * q, u8 * elem); +void vl_msg_api_send_shmem_nolock (svm_queue_t * q, u8 * elem); +void vl_set_memory_region_name (const char *name); +void vl_set_memory_root_path (const char *root_path); +void vl_set_memory_uid (int uid); +void vl_set_memory_gid (int gid); +void vl_set_global_memory_baseva (u64 baseva); +void vl_set_global_memory_size (u64 size); +void vl_set_api_memory_size (u64 size); +void vl_set_global_pvt_heap_size (u64 size); +void vl_set_api_pvt_heap_size (u64 size); +void vl_init_shmem (svm_region_t * vlib_rp, vl_api_shm_elem_config_t * config, + int is_vlib, int is_private_region); + +#endif /* SRC_VLIBMEMORY_MEMORY_SHARED_H_ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg