2 *------------------------------------------------------------------
3 * Copyright (c) 2017 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
19 #ifndef _MEMIF_PRIVATE_H_
20 #define _MEMIF_PRIVATE_H_
24 #include <sys/syscall.h>
28 #include <sys/timerfd.h>
33 #define MEMIF_NAME_LEN 32
34 _Static_assert (strlen (MEMIF_DEFAULT_APP_NAME) <= MEMIF_NAME_LEN,
35 "MEMIF_DEFAULT_APP_NAME max length is 32");
37 #define MEMIF_DEFAULT_SOCKET_DIR "/run/vpp"
38 #define MEMIF_DEFAULT_SOCKET_FILENAME "memif.sock"
39 #define MEMIF_DEFAULT_RING_SIZE 1024
40 #define MEMIF_DEFAULT_LOG2_RING_SIZE 10
41 #define MEMIF_DEFAULT_RX_QUEUES 1
42 #define MEMIF_DEFAULT_TX_QUEUES 1
43 #define MEMIF_DEFAULT_BUFFER_SIZE 2048
45 #define MEMIF_MAX_M2S_RING 255
46 #define MEMIF_MAX_S2M_RING 255
47 #define MEMIF_MAX_REGION 255
48 #define MEMIF_MAX_LOG2_RING_SIZE 15
50 #define MEMIF_MAX_FDS 512
52 #define memif_min(a,b) (((a) < (b)) ? (a) : (b))
55 #define DBG(...) do { \
56 printf("MEMIF_DEBUG:%s:%s:%d: ", __FILE__, __func__, __LINE__); \
57 printf(__VA_ARGS__); \
61 #define DBG_UNIX(...) do { \
62 printf("MEMIF_DEBUG_UNIX:%s:%s:%d: ", __FILE__, __func__, __LINE__); \
63 printf(__VA_ARGS__); \
67 #define error_return_unix(...) do { \
68 DBG_UNIX(__VA_ARGS__); \
71 #define error_return(...) do { \
78 #define error_return_unix(...) do { \
81 #define error_return(...) do { \
85 #endif /* MEMIF_DBG */
97 uint8_t log2_ring_size;
110 typedef struct memif_msg_queue_elt
114 struct memif_msg_queue_elt *next;
115 } memif_msg_queue_elt_t;
117 struct memif_connection;
119 typedef struct memif_connection memif_connection_t;
121 /* functions called by memif_control_fd_handler */
122 typedef int (memif_fn) (memif_connection_t * conn);
126 uint8_t num_s2m_rings;
127 uint8_t num_m2s_rings;
128 uint16_t buffer_size;
129 memif_log2_ring_size_t log2_ring_size;
130 } memif_conn_run_args_t;
132 typedef struct memif_connection
135 memif_conn_args_t args;
136 memif_conn_run_args_t run_args;
141 memif_fn *write_fn, *read_fn, *error_fn;
143 memif_connection_update_t *on_connect, *on_disconnect;
144 memif_interrupt_t *on_interrupt;
147 /* connection message queue */
148 memif_msg_queue_elt_t *msg_queue;
150 uint8_t remote_if_name[MEMIF_NAME_LEN];
151 uint8_t remote_name[MEMIF_NAME_LEN];
152 uint8_t remote_disconnect_string[96];
154 memif_region_t *regions;
156 memif_queue_t *rx_queues;
157 memif_queue_t *tx_queues;
160 #define MEMIF_CONNECTION_FLAG_WRITE (1 << 0)
161 } memif_connection_t;
168 int key; /* fd or id */
180 uint16_t interface_list_len;
181 memif_list_elt_t *interface_list; /* memif master interfaces listening on this socket */
187 /* probably function like memif_cleanup () will need to be called to close timerfd */
190 memif_control_fd_update_t *control_fd_update;
192 struct itimerspec arm, disarm;
193 uint16_t disconn_slaves;
194 uint8_t app_name[MEMIF_NAME_LEN];
196 /* master implementation... */
199 uint16_t control_list_len;
200 uint16_t interrupt_list_len;
201 uint16_t listener_list_len;
202 uint16_t pending_list_len;
203 memif_list_elt_t *control_list;
204 memif_list_elt_t *interrupt_list;
205 memif_list_elt_t *listener_list;
206 memif_list_elt_t *pending_list;
209 extern libmemif_main_t libmemif_main;
210 extern int memif_epfd;
214 /* if region doesn't contain shared memory, mmap region, check ring cookie */
215 int memif_connect1 (memif_connection_t * c);
217 /* memory map region, initalize rings and queues */
218 int memif_init_regions_and_queues (memif_connection_t * c);
220 int memif_disconnect_internal (memif_connection_t * c);
222 /* map errno to memif error code */
223 int memif_syscall_error_handler (int err_code);
225 int add_list_elt (memif_list_elt_t * e, memif_list_elt_t ** list,
228 int get_list_elt (memif_list_elt_t ** e, memif_list_elt_t * list,
229 uint16_t len, int key);
231 int free_list_elt (memif_list_elt_t * list, uint16_t len, int key);
233 #ifndef __NR_memfd_create
234 #if defined __x86_64__
235 #define __NR_memfd_create 319
236 #elif defined __arm__
237 #define __NR_memfd_create 385
238 #elif defined __aarch64__
239 #define __NR_memfd_create 279
241 #error "__NR_memfd_create unknown for this architecture"
245 #ifndef HAVE_MEMFD_CREATE
247 memfd_create (const char *name, unsigned int flags)
249 return syscall (__NR_memfd_create, name, flags);
254 memif_get_buffer (memif_connection_t * conn, memif_ring_t * ring,
257 return (conn->regions[ring->desc[index].region].shm +
258 ring->desc[index].offset);
261 #ifndef F_LINUX_SPECIFIC_BASE
262 #define F_LINUX_SPECIFIC_BASE 1024
265 #ifndef MFD_ALLOW_SEALING
266 #define MFD_ALLOW_SEALING 0x0002U
270 #define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
271 #define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
273 #define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
274 #define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
275 #define F_SEAL_GROW 0x0004 /* prevent file from growing */
276 #define F_SEAL_WRITE 0x0008 /* prevent writes */
279 #endif /* _MEMIF_PRIVATE_H_ */