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 *------------------------------------------------------------------
20 #include <sys/types.h>
22 #include <sys/ioctl.h>
23 #include <sys/socket.h>
27 #include <sys/prctl.h>
33 #include <linux/icmp.h>
34 #include <arpa/inet.h>
36 #include <netinet/if_ether.h>
37 #include <net/if_arp.h>
38 #include <asm/byteorder.h>
43 #include <sys/eventfd.h>
44 #include <sys/timerfd.h>
45 #include <sys/epoll.h>
48 /* memif protocol msg, ring and descriptor definitions */
52 /* socket messaging functions */
54 /* private structs and functions */
55 #include <memif_private.h>
57 #define ERRLIST_LEN 36
58 #define MAX_ERRBUF_LEN 256
61 #define MEMIF_MEMORY_BARRIER() __builtin_ia32_sfence ()
63 #define MEMIF_MEORY_BARRIER() __sync_synchronize ()
64 #endif /* __x86_x64__ */
66 libmemif_main_t libmemif_main;
69 static char memif_buf[MAX_ERRBUF_LEN];
71 const char *memif_errlist[ERRLIST_LEN] = { /* MEMIF_ERR_SUCCESS */
73 /* MEMIF_ERR_SYSCALL */
74 "Unspecified syscall error (build with -DMEMIF_DBG or make debug).",
76 "Permission to resoure denied.",
77 /* MEMIF_ERR_NO_FILE */
78 "Socket file does not exist",
79 /* MEMIF_ERR_FILE_LIMIT */
80 "System limit on total numer of open files reached.",
81 /* MEMIF_ERR_PROC_FILE_LIMIT */
82 "Per-process limit on total number of open files reached.",
83 /* MEMIF_ERR_ALREADY */
84 "Connection already requested.",
86 "File descriptor refers to file other than socket, or operation would block.",
87 /* MEMIF_ERR_BAD_FD */
88 "Bad file descriptor.",
91 /* MEMIF_ERR_INVAL_ARG */
93 /* MEMIF_ERR_NOCONN */
94 "Memif connection handle does not point to existing conenction",
96 "Memif connection handle points to existing connection",
97 /* MEMIF_ERR_CB_FDUPDATE */
98 "Callback memif_control_fd_update_t returned error",
99 /* MEMIF_ERR_FILE_NOT_SOCK */
100 "File specified by socket filename exists and is not socket.",
101 /* MEMIF_ERR_NO_SHMFD */
102 "Missing shared memory file descriptor. (internal error)",
103 /* MEMIF_ERR_COOKIE */
104 "Invalid cookie on ring. (internal error)",
105 /* MEMIF_ERR_NOBUF_RING */
107 /* MEMIF_ERR_NOBUF */
108 "Not enough memif buffers. There are unreceived data in shared memory.",
109 /* MEMIF_ERR_NOBUF_DET */
110 "Not enough space for memif details in suplied buffer. String data might be malformed.",
111 /* MEMIF_ERR_INT_WRITE */
112 "Send interrupt error.",
113 /* MEMIF_ERR_MFMSG */
114 "Malformed message received on control channel.",
117 /* MEMIF_ERR_PROTO */
118 "Incompatible memory interface protocol version.",
120 "Unmatched interface id.",
121 /* MEMIF_ERR_ACCSLAVE */
122 "Slave cannot accept connection reqest.",
123 /* MEMIF_ERR_ALRCONN */
124 "Interface is already connected.",
127 /* MEMIF_ERR_SECRET */
129 /* MEMIF_ERR_NOSECRET */
131 /* MEMIF_ERR_MAXREG */
132 "Limit on total number of regions reached.",
133 /* MEMIF_ERR_MAXRING */
134 "Limit on total number of ring reached.",
135 /* MEMIF_ERR_NO_INTFD */
136 "Missing interrupt file descriptor. (internal error)",
137 /* MEMIF_ERR_DISCONNECT */
138 "Interface received disconnect request.",
139 /* MEMIF_ERR_DISCONNECTED */
140 "Interface is disconnected.",
141 /* MEMIF_ERR_UNKNOWN_MSG */
142 "Unknown message type received on control channel. (internal error)"
145 #define MEMIF_ERR_UNDEFINED "undefined error"
148 memif_strerror (int err_code)
150 if (err_code >= ERRLIST_LEN)
152 strncpy (memif_buf, MEMIF_ERR_UNDEFINED, strlen (MEMIF_ERR_UNDEFINED));
153 memif_buf[strlen (MEMIF_ERR_UNDEFINED)] = '\0';
157 strncpy (memif_buf, memif_errlist[err_code],
158 strlen (memif_errlist[err_code]));
159 memif_buf[strlen (memif_errlist[err_code])] = '\0';
164 #define DBG_TX_BUF (0)
165 #define DBG_RX_BUF (1)
169 print_bytes (void *data, uint16_t len, uint8_t q)
172 printf ("\nTX:\n\t");
174 printf ("\nRX:\n\t");
176 for (i = 0; i < len; i++)
179 printf ("\n%d:\t", i);
180 printf ("%02X ", ((uint8_t *) (data))[i]);
184 #endif /* MEMIF_DBG */
187 memif_syscall_error_handler (int err_code)
189 DBG_UNIX ("%s", strerror (err_code));
192 return MEMIF_ERR_SUCCESS;
193 if (err_code == EACCES)
194 return MEMIF_ERR_ACCES;
195 if (err_code == ENFILE)
196 return MEMIF_ERR_FILE_LIMIT;
197 if (err_code == EMFILE)
198 return MEMIF_ERR_PROC_FILE_LIMIT;
199 if (err_code == ENOMEM)
200 return MEMIF_ERR_NOMEM;
201 /* connection refused if master dows not exist
202 this error would spam the user until master was created */
203 if (err_code == ECONNREFUSED)
204 return MEMIF_ERR_SUCCESS;
205 if (err_code == EALREADY)
206 return MEMIF_ERR_ALREADY;
207 if (err_code == EAGAIN)
208 return MEMIF_ERR_AGAIN;
209 if (err_code == EBADF)
210 return MEMIF_ERR_BAD_FD;
211 if (err_code == ENOENT)
212 return MEMIF_ERR_NO_FILE;
214 /* other syscall errors */
215 return MEMIF_ERR_SYSCALL;
219 memif_add_epoll_fd (int fd, uint32_t events)
223 DBG ("invalid fd %d", fd);
226 struct epoll_event evt;
227 memset (&evt, 0, sizeof (evt));
230 if (epoll_ctl (memif_epfd, EPOLL_CTL_ADD, fd, &evt) < 0)
232 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
235 DBG ("fd %d added to epoll", fd);
240 memif_mod_epoll_fd (int fd, uint32_t events)
244 DBG ("invalid fd %d", fd);
247 struct epoll_event evt;
248 memset (&evt, 0, sizeof (evt));
251 if (epoll_ctl (memif_epfd, EPOLL_CTL_MOD, fd, &evt) < 0)
253 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
256 DBG ("fd %d moddified on epoll", fd);
261 memif_del_epoll_fd (int fd)
265 DBG ("invalid fd %d", fd);
268 struct epoll_event evt;
269 memset (&evt, 0, sizeof (evt));
270 if (epoll_ctl (memif_epfd, EPOLL_CTL_DEL, fd, &evt) < 0)
272 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
275 DBG ("fd %d removed from epoll", fd);
280 memif_control_fd_update (int fd, uint8_t events)
282 if (events & MEMIF_FD_EVENT_DEL)
283 return memif_del_epoll_fd (fd);
286 if (events & MEMIF_FD_EVENT_READ)
288 if (events & MEMIF_FD_EVENT_WRITE)
291 if (events & MEMIF_FD_EVENT_MOD)
292 return memif_mod_epoll_fd (fd, evt);
294 return memif_add_epoll_fd (fd, evt);
298 add_list_elt (memif_list_elt_t * e, memif_list_elt_t ** list, uint16_t * len)
300 libmemif_main_t *lm = &libmemif_main;
303 for (i = 0; i < *len; i++)
305 if ((*list)[i].data_struct == NULL)
307 (*list)[i].key = e->key;
308 (*list)[i].data_struct = e->data_struct;
312 memif_list_elt_t *tmp;
313 tmp = realloc (*list, sizeof (memif_list_elt_t) * *len * 2);
317 for (i = *len; i < *len * 2; i++)
320 tmp[i].data_struct = NULL;
323 tmp[*len].key = e->key;
324 tmp[*len].data_struct = e->data_struct;
333 get_list_elt (memif_list_elt_t ** e, memif_list_elt_t * list, uint16_t len,
342 for (i = 0; i < len; i++)
344 if (list[i].key == key)
354 /* does not free memory, only marks element as free */
356 free_list_elt (memif_list_elt_t * list, uint16_t len, int key)
359 for (i = 0; i < len; i++)
361 if (list[i].key == key)
364 list[i].data_struct = NULL;
373 free_list_elt_ctx (memif_list_elt_t * list, uint16_t len,
374 memif_connection_t * ctx)
377 for (i = 0; i < len; i++)
379 if (list[i].key == -1)
381 if (list[i].data_struct == ctx)
383 list[i].data_struct = NULL;
393 memif_control_fd_update_register (memif_control_fd_update_t * cb)
395 libmemif_main_t *lm = &libmemif_main;
396 lm->control_fd_update = cb;
400 memif_init (memif_control_fd_update_t * on_control_fd_update, char *app_name)
402 int err = MEMIF_ERR_SUCCESS; /* 0 */
403 libmemif_main_t *lm = &libmemif_main;
407 lm->app_name = malloc (strlen (app_name) + sizeof (char));
408 memset (lm->app_name, 0, strlen (app_name) + sizeof (char));
409 strncpy ((char *) lm->app_name, app_name, strlen (app_name));
413 lm->app_name = malloc (strlen (MEMIF_DEFAULT_APP_NAME) + sizeof (char));
414 memset (lm->app_name, 0, strlen (app_name) + sizeof (char));
415 strncpy ((char *) lm->app_name, MEMIF_DEFAULT_APP_NAME,
416 strlen (MEMIF_DEFAULT_APP_NAME));
419 /* register control fd update callback */
420 if (on_control_fd_update != NULL)
421 memif_control_fd_update_register (on_control_fd_update);
424 memif_epfd = epoll_create (1);
425 memif_control_fd_update_register (memif_control_fd_update);
426 DBG ("libmemif event polling initialized");
429 memset (&lm->ms, 0, sizeof (memif_socket_t));
431 lm->control_list_len = 2;
432 lm->interrupt_list_len = 2;
433 lm->listener_list_len = 1;
434 lm->pending_list_len = 1;
437 malloc (sizeof (memif_list_elt_t) * lm->control_list_len);
439 malloc (sizeof (memif_list_elt_t) * lm->interrupt_list_len);
441 malloc (sizeof (memif_list_elt_t) * lm->listener_list_len);
443 malloc (sizeof (memif_list_elt_t) * lm->pending_list_len);
446 for (i = 0; i < lm->control_list_len; i++)
448 lm->control_list[i].key = -1;
449 lm->control_list[i].data_struct = NULL;
451 for (i = 0; i < lm->interrupt_list_len; i++)
453 lm->interrupt_list[i].key = -1;
454 lm->interrupt_list[i].data_struct = NULL;
456 for (i = 0; i < lm->listener_list_len; i++)
458 lm->listener_list[i].key = -1;
459 lm->listener_list[i].data_struct = NULL;
461 for (i = 0; i < lm->pending_list_len; i++)
463 lm->pending_list[i].key = -1;
464 lm->pending_list[i].data_struct = NULL;
467 lm->disconn_slaves = 0;
469 lm->timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK);
473 DBG ("timerfd: %s", strerror (err));
474 return memif_syscall_error_handler (err);
477 lm->arm.it_value.tv_sec = 2;
478 lm->arm.it_value.tv_nsec = 0;
479 lm->arm.it_interval.tv_sec = 2;
480 lm->arm.it_interval.tv_nsec = 0;
481 memset (&lm->disarm, 0, sizeof (lm->disarm));
483 if (lm->control_fd_update (lm->timerfd, MEMIF_FD_EVENT_READ) < 0)
485 DBG ("callback type memif_control_fd_update_t error!");
486 return MEMIF_ERR_CB_FDUPDATE;
492 static inline memif_ring_t *
493 memif_get_ring (memif_connection_t * conn, memif_ring_type_t type,
496 if (&conn->regions[0] == NULL)
498 void *p = conn->regions[0].shm;
500 sizeof (memif_ring_t) +
501 sizeof (memif_desc_t) * (1 << conn->run_args.log2_ring_size);
502 p += (ring_num + type * conn->run_args.num_s2m_rings) * ring_size;
504 return (memif_ring_t *) p;
508 memif_set_rx_mode (memif_conn_handle_t c, memif_rx_mode_t rx_mode,
511 memif_connection_t *conn = (memif_connection_t *) c;
513 return MEMIF_ERR_NOCONN;
515 (conn->args.is_master) ? conn->run_args.num_s2m_rings : conn->run_args.
518 return MEMIF_ERR_QID;
520 conn->rx_queues[qid].ring->flags = rx_mode;
521 DBG ("rx_mode flag: %u", conn->rx_queues[qid].ring->flags);
522 return MEMIF_ERR_SUCCESS;
526 memif_create (memif_conn_handle_t * c, memif_conn_args_t * args,
527 memif_connection_update_t * on_connect,
528 memif_connection_update_t * on_disconnect,
529 memif_interrupt_t * on_interrupt, void *private_ctx)
531 int err, i, index, sockfd = -1;
532 memif_list_elt_t list_elt;
533 memif_connection_t *conn = (memif_connection_t *) * c;
536 DBG ("This handle already points to existing memif.");
537 return MEMIF_ERR_CONN;
539 conn = (memif_connection_t *) malloc (sizeof (memif_connection_t));
542 err = memif_syscall_error_handler (errno);
545 memset (conn, 0, sizeof (memif_connection_t));
547 libmemif_main_t *lm = &libmemif_main;
549 conn->args.interface_id = args->interface_id;
551 if (args->log2_ring_size == 0)
552 args->log2_ring_size = MEMIF_DEFAULT_LOG2_RING_SIZE;
553 if (args->buffer_size == 0)
554 args->buffer_size = MEMIF_DEFAULT_BUFFER_SIZE;
555 if (args->num_s2m_rings == 0)
556 args->num_s2m_rings = MEMIF_DEFAULT_TX_QUEUES;
557 if (args->num_m2s_rings == 0)
558 args->num_m2s_rings = MEMIF_DEFAULT_RX_QUEUES;
560 conn->args.num_s2m_rings = args->num_s2m_rings;
561 conn->args.num_m2s_rings = args->num_m2s_rings;
562 conn->args.buffer_size = args->buffer_size;
563 conn->args.log2_ring_size = args->log2_ring_size;
564 conn->args.is_master = args->is_master;
565 conn->args.mode = args->mode;
566 conn->msg_queue = NULL;
567 conn->regions = NULL;
568 conn->tx_queues = NULL;
569 conn->rx_queues = NULL;
571 conn->on_connect = on_connect;
572 conn->on_disconnect = on_disconnect;
573 conn->on_interrupt = on_interrupt;
574 conn->private_ctx = private_ctx;
575 memset (&conn->run_args, 0, sizeof (memif_conn_run_args_t));
577 uint8_t l = strlen ((char *) args->interface_name);
578 strncpy ((char *) conn->args.interface_name, (char *) args->interface_name,
581 l = strlen ((char *) args->instance_name);
582 strncpy ((char *) conn->args.instance_name, (char *) args->instance_name,
585 /* allocate and initialize socket_filename so it can be copyed to sun_path
586 without memory leaks */
587 conn->args.socket_filename = malloc (sizeof (char *) * 108);
588 memset (conn->args.socket_filename, 0, 108 * sizeof (char *));
590 if (args->socket_filename)
592 if (conn->args.socket_filename == NULL)
594 err = memif_syscall_error_handler (errno);
597 strncpy ((char *) conn->args.socket_filename,
598 (char *) args->socket_filename,
599 strlen ((char *) args->socket_filename));
603 uint16_t sdl = strlen (MEMIF_DEFAULT_SOCKET_DIR);
604 uint16_t sfl = strlen (MEMIF_DEFAULT_SOCKET_FILENAME);
605 if (conn->args.socket_filename == NULL)
607 err = memif_syscall_error_handler (errno);
610 strncpy ((char *) conn->args.socket_filename,
611 MEMIF_DEFAULT_SOCKET_DIR, sdl);
612 conn->args.socket_filename[sdl] = '/';
613 strncpy ((char *) (conn->args.socket_filename + 1 + sdl),
614 MEMIF_DEFAULT_SOCKET_FILENAME, sfl);
619 l = strlen ((char *) args->secret);
620 strncpy ((char *) conn->args.secret, (char *) args->secret, l);
623 if (conn->args.is_master)
625 conn->run_args.buffer_size = conn->args.buffer_size;
627 memif_list_elt_t elt;
628 for (i = 0; i < lm->listener_list_len; i++)
631 (memif_socket_t *) lm->listener_list[i].data_struct) != NULL)
634 ((char *) ms->filename, (char *) conn->args.socket_filename,
635 strlen ((char *) ms->filename)) == 0)
637 /* add interface to listener socket */
638 elt.key = conn->args.interface_id;
639 *c = elt.data_struct = conn;
640 add_list_elt (&elt, &ms->interface_list,
641 &ms->interface_list_len);
643 conn->listener_fd = ms->fd;
649 struct stat file_stat;
650 if (stat ((char *) conn->args.socket_filename, &file_stat) == 0)
652 if (S_ISSOCK (file_stat.st_mode))
653 unlink ((char *) conn->args.socket_filename);
655 return memif_syscall_error_handler (errno);
657 DBG ("creating socket file");
658 ms = malloc (sizeof (memif_socket_t));
659 ms->filename = malloc (strlen ((char *) conn->args.
662 memset (ms->filename, 0,
663 strlen ((char *) conn->args.socket_filename) +
665 strncpy ((char *) ms->filename,
666 (char *) conn->args.socket_filename,
667 strlen ((char *) conn->args.socket_filename));
668 ms->interface_list_len = 1;
670 malloc (sizeof (memif_list_elt_t) * ms->interface_list_len);
671 ms->interface_list[0].key = -1;
672 ms->interface_list[0].data_struct = NULL;
673 struct sockaddr_un un = { 0 };
676 ms->fd = socket (AF_UNIX, SOCK_SEQPACKET, 0);
679 err = memif_syscall_error_handler (errno);
682 DBG ("socket %d created", ms->fd);
683 un.sun_family = AF_UNIX;
684 strncpy ((char *) un.sun_path, (char *) ms->filename,
685 sizeof (un.sun_path) - 1);
688 (ms->fd, SOL_SOCKET, SO_PASSCRED, &on, sizeof (on)) < 0)
690 err = memif_syscall_error_handler (errno);
694 if (bind (ms->fd, (struct sockaddr *) &un, sizeof (un)) < 0)
696 err = memif_syscall_error_handler (errno);
700 if (listen (ms->fd, 1) < 0)
702 err = memif_syscall_error_handler (errno);
706 if (stat ((char *) ms->filename, &file_stat) < 0)
708 err = memif_syscall_error_handler (errno);
712 /* add interface to listener socket */
713 elt.key = conn->args.interface_id;
714 *c = elt.data_struct = conn;
715 add_list_elt (&elt, &ms->interface_list,
716 &ms->interface_list_len);
718 conn->listener_fd = ms->fd;
720 /* add listener socket to libmemif main */
722 elt.data_struct = ms;
723 add_list_elt (&elt, &lm->listener_list, &lm->listener_list_len);
724 lm->control_fd_update (ms->fd, MEMIF_FD_EVENT_READ);
731 if (lm->disconn_slaves == 0)
733 if (timerfd_settime (lm->timerfd, 0, &lm->arm, NULL) < 0)
735 err = memif_syscall_error_handler (errno);
740 lm->disconn_slaves++;
743 *c = list_elt.data_struct = conn;
745 add_list_elt (&list_elt, &lm->control_list,
746 &lm->control_list_len)) < 0)
748 err = MEMIF_ERR_NOMEM;
761 if (conn->args.socket_filename)
762 free (conn->args.socket_filename);
770 memif_control_fd_handler (int fd, uint8_t events)
772 int i, rv, sockfd = -1, err = MEMIF_ERR_SUCCESS; /* 0 */
774 memif_list_elt_t *e = NULL;
775 memif_connection_t *conn;
776 libmemif_main_t *lm = &libmemif_main;
777 if (fd == lm->timerfd)
781 size = read (fd, &b, sizeof (b));
782 for (i = 0; i < lm->control_list_len; i++)
784 if ((lm->control_list[i].key < 0)
785 && (lm->control_list[i].data_struct != NULL))
787 conn = lm->control_list[i].data_struct;
788 if (conn->args.is_master)
791 struct sockaddr_un sun;
792 sockfd = socket (AF_UNIX, SOCK_SEQPACKET, 0);
795 err = memif_syscall_error_handler (errno);
799 sun.sun_family = AF_UNIX;
801 strncpy (sun.sun_path, conn->args.socket_filename,
802 sizeof (sun.sun_path) - 1);
804 if (connect (sockfd, (struct sockaddr *) &sun,
805 sizeof (struct sockaddr_un)) == 0)
808 conn->read_fn = memif_conn_fd_read_ready;
809 conn->write_fn = memif_conn_fd_write_ready;
810 conn->error_fn = memif_conn_fd_error;
812 lm->control_list[conn->index].key = conn->fd;
814 lm->control_fd_update (sockfd,
815 MEMIF_FD_EVENT_READ |
816 MEMIF_FD_EVENT_WRITE);
818 lm->disconn_slaves--;
819 if (lm->disconn_slaves == 0)
821 if (timerfd_settime (lm->timerfd, 0, &lm->disarm, NULL)
824 err = memif_syscall_error_handler (errno);
831 err = memif_syscall_error_handler (errno);
839 get_list_elt (&e, lm->interrupt_list, lm->interrupt_list_len, fd);
842 if (((memif_connection_t *) e->data_struct)->on_interrupt != NULL)
845 (((memif_connection_t *) e->data_struct)->args.
846 is_master) ? ((memif_connection_t *) e->data_struct)->
847 run_args.num_s2m_rings : ((memif_connection_t *) e->
848 data_struct)->run_args.
850 for (i = 0; i < num; i++)
852 if (((memif_connection_t *) e->data_struct)->rx_queues[i].
855 ((memif_connection_t *) e->data_struct)->on_interrupt ((void *) e->data_struct, ((memif_connection_t *) e->data_struct)->private_ctx, i);
856 return MEMIF_ERR_SUCCESS;
860 return MEMIF_ERR_SUCCESS;
862 get_list_elt (&e, lm->listener_list, lm->listener_list_len, fd);
865 memif_conn_fd_accept_ready ((memif_socket_t *) e->data_struct);
866 return MEMIF_ERR_SUCCESS;
869 get_list_elt (&e, lm->pending_list, lm->pending_list_len, fd);
872 memif_read_ready (fd);
873 return MEMIF_ERR_SUCCESS;
876 get_list_elt (&e, lm->control_list, lm->control_list_len, fd);
879 if (events & MEMIF_FD_EVENT_READ)
882 ((memif_connection_t *) e->data_struct)->read_fn (e->
884 if (err != MEMIF_ERR_SUCCESS)
887 if (events & MEMIF_FD_EVENT_WRITE)
890 ((memif_connection_t *) e->data_struct)->write_fn (e->
892 if (err != MEMIF_ERR_SUCCESS)
895 if (events & MEMIF_FD_EVENT_ERROR)
898 ((memif_connection_t *) e->data_struct)->error_fn (e->
900 if (err != MEMIF_ERR_SUCCESS)
906 return MEMIF_ERR_SUCCESS; /* 0 */
916 memif_poll_event (int timeout)
918 libmemif_main_t *lm = &libmemif_main;
919 memif_list_elt_t *elt;
920 struct epoll_event evt, *e;
921 int en = 0, err = MEMIF_ERR_SUCCESS, i = 0; /* 0 */
924 memset (&evt, 0, sizeof (evt));
925 evt.events = EPOLLIN | EPOLLOUT;
927 sigemptyset (&sigset);
928 en = epoll_pwait (memif_epfd, &evt, 1, timeout, &sigset);
931 DBG ("epoll_pwait: %s", strerror (errno));
936 if (evt.events & EPOLLIN)
937 events |= MEMIF_FD_EVENT_READ;
938 if (evt.events & EPOLLOUT)
939 events |= MEMIF_FD_EVENT_WRITE;
940 if (evt.events & EPOLLERR)
941 events |= MEMIF_FD_EVENT_ERROR;
942 err = memif_control_fd_handler (evt.data.fd, events);
949 memif_msg_queue_free (memif_msg_queue_elt_t ** e)
953 memif_msg_queue_free (&(*e)->next);
959 /* send disconnect msg and close interface */
961 memif_disconnect_internal (memif_connection_t * c)
965 DBG ("no connection");
966 return MEMIF_ERR_NOCONN;
969 int err = MEMIF_ERR_SUCCESS, i; /* 0 */
971 libmemif_main_t *lm = &libmemif_main;
974 c->on_disconnect ((void *) c, c->private_ctx);
978 memif_msg_send_disconnect (c->fd, "interface deleted", 0);
979 lm->control_fd_update (c->fd, MEMIF_FD_EVENT_DEL);
982 get_list_elt (&e, lm->control_list, lm->control_list_len, c->fd);
985 if (c->args.is_master)
986 free_list_elt (lm->control_list, lm->control_list_len, c->fd);
990 if (c->tx_queues != NULL)
993 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
995 for (i = 0; i < num; i++)
997 mq = &c->tx_queues[i];
1002 free_list_elt (lm->interrupt_list, lm->interrupt_list_len,
1007 free (c->tx_queues);
1008 c->tx_queues = NULL;
1011 if (c->rx_queues != NULL)
1014 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1016 for (i = 0; i < num; i++)
1018 mq = &c->rx_queues[i];
1023 if (c->on_interrupt != NULL)
1024 lm->control_fd_update (mq->int_fd, MEMIF_FD_EVENT_DEL);
1027 free_list_elt (lm->interrupt_list, lm->interrupt_list_len,
1032 free (c->rx_queues);
1033 c->rx_queues = NULL;
1036 if (c->regions != NULL)
1038 if (munmap (c->regions[0].shm, c->regions[0].region_size) < 0)
1039 return memif_syscall_error_handler (errno);
1040 if (c->regions[0].fd > 0)
1041 close (c->regions[0].fd);
1042 c->regions[0].fd = -1;
1047 memset (&c->run_args, 0, sizeof (memif_conn_run_args_t));
1049 memif_msg_queue_free (&c->msg_queue);
1051 if (!(c->args.is_master))
1053 if (lm->disconn_slaves == 0)
1055 if (timerfd_settime (lm->timerfd, 0, &lm->arm, NULL) < 0)
1057 err = memif_syscall_error_handler (errno);
1058 DBG_UNIX ("timerfd_settime: arm");
1061 lm->disconn_slaves++;
1068 memif_delete (memif_conn_handle_t * conn)
1070 memif_connection_t *c = (memif_connection_t *) * conn;
1073 DBG ("no connection");
1074 return MEMIF_ERR_NOCONN;
1076 libmemif_main_t *lm = &libmemif_main;
1077 memif_list_elt_t *e = NULL;
1078 memif_socket_t *ms = NULL;
1080 int err = MEMIF_ERR_SUCCESS;
1084 DBG ("DISCONNECTING");
1085 err = memif_disconnect_internal (c);
1086 if (err == MEMIF_ERR_NOCONN)
1090 free_list_elt_ctx (lm->control_list, lm->control_list_len, c);
1092 if (c->args.is_master)
1094 get_list_elt (&e, lm->listener_list, lm->listener_list_len,
1098 ms = (memif_socket_t *) e->data_struct;
1100 free_list_elt (ms->interface_list, ms->interface_list_len,
1101 c->args.interface_id);
1102 if (ms->use_count <= 0)
1104 lm->control_fd_update (c->listener_fd, MEMIF_FD_EVENT_DEL);
1105 free_list_elt (lm->listener_list, lm->listener_list_len,
1107 close (c->listener_fd);
1108 c->listener_fd = ms->fd = -1;
1109 free (ms->interface_list);
1110 ms->interface_list = NULL;
1111 free (ms->filename);
1112 ms->filename = NULL;
1120 lm->disconn_slaves--;
1121 if (lm->disconn_slaves <= 0)
1123 if (timerfd_settime (lm->timerfd, 0, &lm->disarm, NULL) < 0)
1125 err = memif_syscall_error_handler (errno);
1126 DBG ("timerfd_settime: disarm");
1131 if (c->args.socket_filename)
1132 free (c->args.socket_filename);
1133 c->args.socket_filename = NULL;
1143 memif_connect1 (memif_connection_t * c)
1145 libmemif_main_t *lm = &libmemif_main;
1146 memif_region_t *mr = c->regions;
1156 return MEMIF_ERR_NO_SHMFD;
1158 if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
1159 MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
1161 return memif_syscall_error_handler (errno);
1167 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1169 for (i = 0; i < num; i++)
1171 mq = &c->tx_queues[i];
1174 mq->ring = c->regions[mq->region].shm + mq->offset;
1175 if (mq->ring->cookie != MEMIF_COOKIE)
1177 DBG ("wrong cookie on tx ring %u", i);
1178 return MEMIF_ERR_COOKIE;
1180 mq->ring->head = mq->ring->tail = mq->last_head = mq->alloc_bufs =
1185 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1187 for (i = 0; i < num; i++)
1189 mq = &c->rx_queues[i];
1192 mq->ring = c->regions[mq->region].shm + mq->offset;
1193 if (mq->ring->cookie != MEMIF_COOKIE)
1195 DBG ("wrong cookie on rx ring %u", i);
1196 return MEMIF_ERR_COOKIE;
1198 mq->ring->head = mq->ring->tail = mq->last_head = mq->alloc_bufs =
1203 lm->control_fd_update (c->fd, MEMIF_FD_EVENT_READ | MEMIF_FD_EVENT_MOD);
1209 memif_init_regions_and_queues (memif_connection_t * conn)
1211 memif_ring_t *ring = NULL;
1212 uint64_t buffer_offset;
1215 libmemif_main_t *lm = &libmemif_main;
1218 conn->regions = (memif_region_t *) malloc (sizeof (memif_region_t));
1219 if (conn->regions == NULL)
1220 return memif_syscall_error_handler (errno);
1224 (conn->run_args.num_s2m_rings +
1225 conn->run_args.num_m2s_rings) * (sizeof (memif_ring_t) +
1226 sizeof (memif_desc_t) *
1227 (1 << conn->run_args.log2_ring_size));
1229 r->region_size = buffer_offset +
1230 conn->run_args.buffer_size * (1 << conn->run_args.log2_ring_size) *
1231 (conn->run_args.num_s2m_rings + conn->run_args.num_m2s_rings);
1233 if ((r->fd = memfd_create ("memif region 0", MFD_ALLOW_SEALING)) == -1)
1234 return memif_syscall_error_handler (errno);
1236 if ((fcntl (r->fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
1237 return memif_syscall_error_handler (errno);
1239 if ((ftruncate (r->fd, r->region_size)) == -1)
1240 return memif_syscall_error_handler (errno);
1242 if ((r->shm = mmap (NULL, r->region_size, PROT_READ | PROT_WRITE,
1243 MAP_SHARED, r->fd, 0)) == MAP_FAILED)
1244 return memif_syscall_error_handler (errno);
1246 for (i = 0; i < conn->run_args.num_s2m_rings; i++)
1248 ring = memif_get_ring (conn, MEMIF_RING_S2M, i);
1249 DBG ("RING: %p I: %d", ring, i);
1250 ring->head = ring->tail = 0;
1251 ring->cookie = MEMIF_COOKIE;
1253 for (j = 0; j < (1 << conn->run_args.log2_ring_size); j++)
1255 uint16_t slot = i * (1 << conn->run_args.log2_ring_size) + j;
1256 ring->desc[j].region = 0;
1257 ring->desc[j].offset = buffer_offset +
1258 (uint32_t) (slot * conn->run_args.buffer_size);
1259 ring->desc[j].buffer_length = conn->run_args.buffer_size;
1262 for (i = 0; i < conn->run_args.num_m2s_rings; i++)
1264 ring = memif_get_ring (conn, MEMIF_RING_M2S, i);
1265 DBG ("RING: %p I: %d", ring, i);
1266 ring->head = ring->tail = 0;
1267 ring->cookie = MEMIF_COOKIE;
1269 for (j = 0; j < (1 << conn->run_args.log2_ring_size); j++)
1273 conn->run_args.num_s2m_rings) *
1274 (1 << conn->run_args.log2_ring_size) + j;
1275 ring->desc[j].region = 0;
1276 ring->desc[j].offset = buffer_offset +
1277 (uint32_t) (slot * conn->run_args.buffer_size);
1278 ring->desc[j].buffer_length = conn->run_args.buffer_size;
1283 (memif_queue_t *) malloc (sizeof (memif_queue_t) *
1284 conn->run_args.num_s2m_rings);
1286 return memif_syscall_error_handler (errno);
1288 for (x = 0; x < conn->run_args.num_s2m_rings; x++)
1290 if ((mq[x].int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
1291 return memif_syscall_error_handler (errno);
1292 /* add int fd to interrupt fd list */
1293 e.key = mq[x].int_fd;
1294 e.data_struct = conn;
1295 add_list_elt (&e, &lm->interrupt_list, &lm->interrupt_list_len);
1297 mq[x].ring = memif_get_ring (conn, MEMIF_RING_S2M, x);
1298 DBG ("RING: %p I: %d", mq[x].ring, x);
1299 mq[x].log2_ring_size = conn->run_args.log2_ring_size;
1302 (void *) mq[x].ring - (void *) conn->regions[mq->region].shm;
1303 mq[x].last_head = 0;
1304 mq[x].alloc_bufs = 0;
1306 conn->tx_queues = mq;
1309 (memif_queue_t *) malloc (sizeof (memif_queue_t) *
1310 conn->run_args.num_m2s_rings);
1312 return memif_syscall_error_handler (errno);
1313 for (x = 0; x < conn->run_args.num_m2s_rings; x++)
1315 if ((mq[x].int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
1316 return memif_syscall_error_handler (errno);
1317 /* add int fd to interrupt fd list */
1318 e.key = mq[x].int_fd;
1319 e.data_struct = conn;
1320 add_list_elt (&e, &lm->interrupt_list, &lm->interrupt_list_len);
1322 mq[x].ring = memif_get_ring (conn, MEMIF_RING_M2S, x);
1323 DBG ("RING: %p I: %d", mq[x].ring, x);
1324 mq[x].log2_ring_size = conn->run_args.log2_ring_size;
1327 (void *) mq[x].ring - (void *) conn->regions[mq->region].shm;
1328 mq[x].last_head = 0;
1329 mq[x].alloc_bufs = 0;
1331 conn->rx_queues = mq;
1337 memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid,
1338 memif_buffer_t * bufs, uint16_t count,
1339 uint16_t * count_out)
1341 memif_connection_t *c = (memif_connection_t *) conn;
1343 return MEMIF_ERR_NOCONN;
1345 return MEMIF_ERR_DISCONNECTED;
1347 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1350 return MEMIF_ERR_QID;
1351 memif_queue_t *mq = &c->tx_queues[qid];
1352 memif_ring_t *ring = mq->ring;
1353 memif_buffer_t *b0, *b1;
1354 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1355 uint16_t s0, s1, ns;
1357 int err = MEMIF_ERR_SUCCESS; /* 0 */
1359 if (ring->tail != ring->head)
1361 if (ring->head > ring->tail)
1362 ns = (1 << mq->log2_ring_size) - ring->head + ring->tail;
1364 ns = ring->tail - ring->head;
1367 ns = (1 << mq->log2_ring_size);
1369 /* (head == tail) ? receive function will asume that no packets are available */
1374 while ((count > 2) && (ns > 2))
1376 s0 = (ring->head + mq->alloc_bufs + *count_out) & mask;
1377 s1 = (ring->head + mq->alloc_bufs + *count_out + 1) & mask;
1379 b0 = (bufs + *count_out);
1380 b1 = (bufs + *count_out + 1);
1382 b0->desc_index = s0;
1383 b1->desc_index = s1;
1384 b0->buffer_len = ring->desc[s0].buffer_length;
1385 b1->buffer_len = ring->desc[s1].buffer_length;
1386 /* TODO: support multiple regions -> ring descriptor contains region index */
1387 b0->data = c->regions->shm + ring->desc[s0].offset;
1388 b1->data = c->regions->shm + ring->desc[s1].offset;
1390 DBG ("allocated ring slots %u, %u", s0, s1);
1395 s0 = (ring->head + mq->alloc_bufs + *count_out) & mask;
1397 b0 = (bufs + *count_out);
1399 b0->desc_index = s0;
1400 b0->buffer_len = ring->desc[s0].buffer_length;
1401 b0->data = c->regions->shm + ring->desc[s0].offset;
1403 DBG ("allocated ring slot %u", s0);
1409 mq->alloc_bufs += *count_out;
1410 DBG ("allocated: %u/%u bufs. Total %u allocated bufs", *count_out, count,
1415 DBG ("ring buffer full! qid: %u", qid);
1416 err = MEMIF_ERR_NOBUF_RING;
1423 memif_buffer_free (memif_conn_handle_t conn, uint16_t qid,
1424 memif_buffer_t * bufs, uint16_t count,
1425 uint16_t * count_out)
1427 memif_connection_t *c = (memif_connection_t *) conn;
1429 return MEMIF_ERR_NOCONN;
1431 return MEMIF_ERR_DISCONNECTED;
1433 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1436 return MEMIF_ERR_QID;
1437 libmemif_main_t *lm = &libmemif_main;
1438 memif_queue_t *mq = &c->rx_queues[qid];
1439 memif_ring_t *ring = mq->ring;
1440 uint16_t tail = ring->tail;
1441 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1442 memif_buffer_t *b0, *b1;
1445 if (mq->alloc_bufs < count)
1446 count = mq->alloc_bufs;
1452 b0 = (bufs + *count_out);
1453 b1 = (bufs + *count_out + 1);
1454 tail = (b0->desc_index + 1) & mask;
1455 tail = (b1->desc_index + 1) & mask;
1461 mq->alloc_bufs -= 2;
1463 b0 = (bufs + *count_out);
1464 tail = (b0->desc_index + 1) & mask;
1471 MEMIF_MEORY_BARRIER ();
1474 return MEMIF_ERR_SUCCESS; /* 0 */
1478 memif_tx_burst (memif_conn_handle_t conn, uint16_t qid,
1479 memif_buffer_t * bufs, uint16_t count, uint16_t * tx)
1481 memif_connection_t *c = (memif_connection_t *) conn;
1483 return MEMIF_ERR_NOCONN;
1485 return MEMIF_ERR_DISCONNECTED;
1487 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1490 return MEMIF_ERR_QID;
1491 memif_queue_t *mq = &c->tx_queues[qid];
1492 memif_ring_t *ring = mq->ring;
1493 uint16_t head = ring->head;
1494 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1496 memif_buffer_t *b0, *b1;
1503 b1 = (bufs + *tx + 1);
1504 ring->desc[b0->desc_index].length = b0->data_len;
1505 ring->desc[b1->desc_index].length = b1->data_len;
1507 #ifdef MEMIF_DBG_SHM
1508 print_bytes (b0->data, b0->data_len, DBG_TX_BUF);
1509 print_bytes (b1->data, b1->data_len, DBG_TX_BUF);
1512 head = (b0->desc_index + 1) & mask;
1513 head = (b1->desc_index + 1) & mask;
1525 ring->desc[b0->desc_index].length = b0->data_len;
1527 #ifdef MEMIF_DBG_SHM
1528 print_bytes (b0->data, b0->data_len, DBG_TX_BUF);
1531 head = (b0->desc_index + 1) & mask;
1539 MEMIF_MEORY_BARRIER ();
1542 mq->alloc_bufs -= *tx;
1544 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0)
1547 int r = write (mq->int_fd, &a, sizeof (a));
1549 return MEMIF_ERR_INT_WRITE;
1552 return MEMIF_ERR_SUCCESS; /* 0 */
1556 memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
1557 memif_buffer_t * bufs, uint16_t count, uint16_t * rx)
1559 memif_connection_t *c = (memif_connection_t *) conn;
1561 return MEMIF_ERR_NOCONN;
1563 return MEMIF_ERR_DISCONNECTED;
1565 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1568 return MEMIF_ERR_QID;
1569 memif_queue_t *mq = &c->rx_queues[qid];
1570 memif_ring_t *ring = mq->ring;
1571 uint16_t head = ring->head;
1573 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1574 memif_buffer_t *b0, *b1;
1578 ssize_t r = read (mq->int_fd, &b, sizeof (b));
1579 if ((r == -1) && (errno != EAGAIN))
1580 return memif_syscall_error_handler (errno);
1582 if (head == mq->last_head)
1585 if (head > mq->last_head)
1586 ns = head - mq->last_head;
1588 ns = (1 << mq->log2_ring_size) - mq->last_head + head;
1592 while ((ns > 2) && (count > 2))
1595 b1 = (bufs + *rx + 1);
1597 b0->desc_index = mq->last_head;
1598 b1->desc_index = mq->last_head + 1;
1599 b0->data = memif_get_buffer (conn, ring, mq->last_head);
1600 b1->data = memif_get_buffer (conn, ring, mq->last_head + 1);
1601 b0->data_len = ring->desc[mq->last_head].length;
1602 b1->data_len = ring->desc[mq->last_head + 1].length;
1603 b0->buffer_len = ring->desc[mq->last_head].buffer_length;
1604 b1->buffer_len = ring->desc[mq->last_head + 1].buffer_length;
1606 #ifdef MEMIF_DBG_SHM
1607 print_bytes (b0->data, b0->data_len, DBG_RX_BUF);
1608 print_bytes (b1->data, b1->data_len, DBG_RX_BUF);
1611 mq->last_head = (mq->last_head + 2) & mask;
1619 b0->desc_index = mq->last_head;
1620 b0->data = memif_get_buffer (conn, ring, mq->last_head);
1621 b0->data_len = ring->desc[mq->last_head].length;
1622 b0->buffer_len = ring->desc[mq->last_head].buffer_length;
1624 #ifdef MEMIF_DBG_SHM
1625 print_bytes (b0->data, b0->data_len, DBG_RX_BUF);
1628 mq->last_head = (mq->last_head + 1) & mask;
1635 mq->alloc_bufs += *rx;
1639 DBG ("not enough buffers!");
1640 return MEMIF_ERR_NOBUF;
1643 return MEMIF_ERR_SUCCESS; /* 0 */
1647 memif_get_details (memif_conn_handle_t conn, memif_details_t * md,
1648 char *buf, ssize_t buflen)
1650 memif_connection_t *c = (memif_connection_t *) conn;
1652 return MEMIF_ERR_NOCONN;
1654 int err = MEMIF_ERR_SUCCESS, i;
1655 ssize_t l0, l1, total_l;
1658 l1 = strlen ((char *) c->args.interface_name);
1659 if (l0 + l1 <= buflen)
1661 md->if_name = strncpy (buf + l0, (char *) c->args.interface_name, l1);
1662 md->if_name[l0 + l1] = '\0';
1666 err = MEMIF_ERR_NOBUF_DET;
1668 l1 = strlen ((char *) c->args.instance_name);
1669 if (l0 + l1 <= buflen)
1671 md->inst_name = strncpy (buf + l0, (char *) c->args.instance_name, l1);
1672 md->inst_name[l0 + l1] = '\0';
1676 err = MEMIF_ERR_NOBUF_DET;
1678 l1 = strlen ((char *) c->remote_if_name);
1679 if (l0 + l1 <= buflen)
1681 md->remote_if_name = strncpy (buf + l0, (char *) c->remote_if_name, l1);
1682 md->remote_if_name[l0 + l1] = '\0';
1686 err = MEMIF_ERR_NOBUF_DET;
1688 l1 = strlen ((char *) c->remote_name);
1689 if (l0 + l1 <= buflen)
1691 md->remote_inst_name = strncpy (buf + l0, (char *) c->remote_name, l1);
1692 md->remote_inst_name[l0 + l1] = '\0';
1696 err = MEMIF_ERR_NOBUF_DET;
1698 md->id = c->args.interface_id;
1702 l1 = strlen ((char *) c->args.secret);
1703 md->secret = strncpy (buf + l0, (char *) c->args.secret, l1);
1704 md->secret[l0 + l1] = '\0';
1708 err = MEMIF_ERR_NOBUF_DET;
1710 md->role = (c->args.is_master) ? 0 : 1;
1711 md->mode = c->args.mode;
1713 l1 = strlen ((char *) c->args.socket_filename);
1714 if (l0 + l1 <= buflen)
1716 md->socket_filename =
1717 strncpy (buf + l0, (char *) c->args.socket_filename, l1);
1718 md->socket_filename[l0 + l1] = '\0';
1722 err = MEMIF_ERR_NOBUF_DET;
1725 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1728 l1 = sizeof (memif_queue_details_t) * md->rx_queues_num;
1729 if (l0 + l1 <= buflen)
1731 md->rx_queues = (memif_queue_details_t *) buf + l0;
1735 err = MEMIF_ERR_NOBUF_DET;
1737 for (i = 0; i < md->rx_queues_num; i++)
1739 md->rx_queues[i].qid = i;
1740 md->rx_queues[i].ring_size = (1 << c->rx_queues[i].log2_ring_size);
1741 md->rx_queues[i].buffer_size = c->run_args.buffer_size;
1745 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1748 l1 = sizeof (memif_queue_details_t) * md->tx_queues_num;
1749 if (l0 + l1 <= buflen)
1751 md->tx_queues = (memif_queue_details_t *) buf + l0;
1755 err = MEMIF_ERR_NOBUF_DET;
1757 for (i = 0; i < md->tx_queues_num; i++)
1759 md->tx_queues[i].qid = i;
1760 md->tx_queues[i].ring_size = (1 << c->tx_queues[i].log2_ring_size);
1761 md->tx_queues[i].buffer_size = c->run_args.buffer_size;
1764 md->link_up_down = (c->fd > 0) ? 1 : 0;
1770 memif_get_queue_efd (memif_conn_handle_t conn, uint16_t qid, int *efd)
1772 memif_connection_t *c = (memif_connection_t *) conn;
1775 return MEMIF_ERR_NOCONN;
1777 return MEMIF_ERR_DISCONNECTED;
1779 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1782 return MEMIF_ERR_QID;
1784 *efd = c->rx_queues[qid].int_fd;
1786 return MEMIF_ERR_SUCCESS;
1792 libmemif_main_t *lm = &libmemif_main;
1794 free (lm->app_name);
1795 lm->app_name = NULL;
1796 if (lm->control_list)
1797 free (lm->control_list);
1798 lm->control_list = NULL;
1799 if (lm->interrupt_list)
1800 free (lm->interrupt_list);
1801 lm->interrupt_list = NULL;
1802 if (lm->listener_list)
1803 free (lm->listener_list);
1804 lm->listener_list = NULL;
1805 if (lm->pending_list)
1806 free (lm->pending_list);
1807 lm->pending_list = NULL;
1809 return MEMIF_ERR_SUCCESS; /* 0 */