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>
34 #define MEMIF_NAME_LEN 32
35 _Static_assert (strlen (MEMIF_DEFAULT_APP_NAME) <= MEMIF_NAME_LEN,
36 "MEMIF_DEFAULT_APP_NAME max length is 32");
38 #define MEMIF_DEFAULT_SOCKET_DIR "/run/vpp"
39 #define MEMIF_DEFAULT_SOCKET_FILENAME "memif.sock"
40 #define MEMIF_DEFAULT_RING_SIZE 1024
41 #define MEMIF_DEFAULT_LOG2_RING_SIZE 10
42 #define MEMIF_DEFAULT_RX_QUEUES 1
43 #define MEMIF_DEFAULT_TX_QUEUES 1
44 #define MEMIF_DEFAULT_BUFFER_SIZE 2048
46 #define MEMIF_MAX_M2S_RING 255
47 #define MEMIF_MAX_S2M_RING 255
48 #define MEMIF_MAX_REGION 255
49 #define MEMIF_MAX_LOG2_RING_SIZE 14
51 #define MEMIF_MAX_FDS 512
53 #define memif_min(a,b) (((a) < (b)) ? (a) : (b))
55 #define EXPECT_TRUE(x) __builtin_expect((x),1)
56 #define EXPECT_FALSE(x) __builtin_expect((x),0)
59 #define DBG(...) do { \
60 printf("MEMIF_DEBUG:%s:%s:%d: ", __FILE__, __func__, __LINE__); \
61 printf(__VA_ARGS__); \
66 #endif /* MEMIF_DBG */
78 uint8_t log2_ring_size;
91 typedef struct memif_msg_queue_elt
95 struct memif_msg_queue_elt *next;
96 } memif_msg_queue_elt_t;
98 struct memif_connection;
100 typedef struct memif_connection memif_connection_t;
102 /* functions called by memif_control_fd_handler */
103 typedef int (memif_fn) (memif_connection_t * conn);
107 uint8_t num_s2m_rings;
108 uint8_t num_m2s_rings;
109 uint16_t buffer_size;
110 memif_log2_ring_size_t log2_ring_size;
111 } memif_conn_run_args_t;
113 typedef struct memif_connection
116 memif_conn_args_t args;
117 memif_conn_run_args_t run_args;
122 memif_fn *write_fn, *read_fn, *error_fn;
124 memif_connection_update_t *on_connect, *on_disconnect;
125 memif_interrupt_t *on_interrupt;
128 /* connection message queue */
129 memif_msg_queue_elt_t *msg_queue;
131 uint8_t remote_if_name[MEMIF_NAME_LEN];
132 uint8_t remote_name[MEMIF_NAME_LEN];
133 uint8_t remote_disconnect_string[96];
135 memif_region_t *regions;
137 memif_queue_t *rx_queues;
138 memif_queue_t *tx_queues;
141 #define MEMIF_CONNECTION_FLAG_WRITE (1 << 0)
142 } memif_connection_t;
155 uint16_t interface_list_len;
156 memif_list_elt_t *interface_list; /* memif master interfaces listening on this socket */
161 memif_control_fd_update_t *control_fd_update;
163 struct itimerspec arm, disarm;
164 uint16_t disconn_slaves;
165 uint8_t app_name[MEMIF_NAME_LEN];
167 memif_alloc_t *alloc;
170 uint16_t control_list_len;
171 uint16_t interrupt_list_len;
172 uint16_t listener_list_len;
173 uint16_t pending_list_len;
174 memif_list_elt_t *control_list;
175 memif_list_elt_t *interrupt_list;
176 memif_list_elt_t *listener_list;
177 memif_list_elt_t *pending_list;
180 extern libmemif_main_t libmemif_main;
181 extern int memif_epfd;
185 /* if region doesn't contain shared memory, mmap region, check ring cookie */
186 int memif_connect1 (memif_connection_t * c);
188 /* memory map region, initalize rings and queues */
189 int memif_init_regions_and_queues (memif_connection_t * c);
191 int memif_disconnect_internal (memif_connection_t * c);
193 /* map errno to memif error code */
194 int memif_syscall_error_handler (int err_code);
196 int add_list_elt (memif_list_elt_t * e, memif_list_elt_t ** list,
199 int get_list_elt (memif_list_elt_t ** e, memif_list_elt_t * list,
200 uint16_t len, int key);
202 int free_list_elt (memif_list_elt_t * list, uint16_t len, int key);
204 #ifndef __NR_memfd_create
205 #if defined __x86_64__
206 #define __NR_memfd_create 319
207 #elif defined __arm__
208 #define __NR_memfd_create 385
209 #elif defined __aarch64__
210 #define __NR_memfd_create 279
212 #error "__NR_memfd_create unknown for this architecture"
216 #ifndef HAVE_MEMFD_CREATE
218 memif_memfd_create (const char *name, unsigned int flags)
220 return syscall (__NR_memfd_create, name, flags);
225 memif_get_buffer (memif_connection_t * conn, memif_ring_t * ring,
228 return (conn->regions[ring->desc[index].region].shm +
229 ring->desc[index].offset);
232 #ifndef F_LINUX_SPECIFIC_BASE
233 #define F_LINUX_SPECIFIC_BASE 1024
236 #ifndef MFD_ALLOW_SEALING
237 #define MFD_ALLOW_SEALING 0x0002U
241 #define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
242 #define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
244 #define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
245 #define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
246 #define F_SEAL_GROW 0x0004 /* prevent file from growing */
247 #define F_SEAL_WRITE 0x0008 /* prevent writes */
250 #endif /* _MEMIF_PRIVATE_H_ */