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 38
58 #define MAX_ERRBUF_LEN 256
61 #define MEMIF_MEMORY_BARRIER() __builtin_ia32_sfence ()
63 #define MEMIF_MEMORY_BARRIER() __sync_synchronize ()
64 #endif /* __x86_x64__ */
66 libmemif_main_t libmemif_main;
68 int poll_cancel_fd = -1;
70 static char memif_buf[MAX_ERRBUF_LEN];
72 const char *memif_errlist[ERRLIST_LEN] = { /* MEMIF_ERR_SUCCESS */
74 /* MEMIF_ERR_SYSCALL */
75 "Unspecified syscall error (build with -DMEMIF_DBG or make debug).",
77 "Permission to resoure denied.",
78 /* MEMIF_ERR_NO_FILE */
79 "Socket file does not exist",
80 /* MEMIF_ERR_FILE_LIMIT */
81 "System limit on total numer of open files reached.",
82 /* MEMIF_ERR_PROC_FILE_LIMIT */
83 "Per-process limit on total number of open files reached.",
84 /* MEMIF_ERR_ALREADY */
85 "Connection already requested.",
87 "File descriptor refers to file other than socket, or operation would block.",
88 /* MEMIF_ERR_BAD_FD */
89 "Bad file descriptor.",
92 /* MEMIF_ERR_INVAL_ARG */
94 /* MEMIF_ERR_NOCONN */
95 "Memif connection handle does not point to existing conenction",
97 "Memif connection handle points to existing connection",
98 /* MEMIF_ERR_CB_FDUPDATE */
99 "Callback memif_control_fd_update_t returned error",
100 /* MEMIF_ERR_FILE_NOT_SOCK */
101 "File specified by socket filename exists and is not socket.",
102 /* MEMIF_ERR_NO_SHMFD */
103 "Missing shared memory file descriptor. (internal error)",
104 /* MEMIF_ERR_COOKIE */
105 "Invalid cookie on ring. (internal error)",
106 /* MEMIF_ERR_NOBUF_RING */
108 /* MEMIF_ERR_NOBUF */
109 "Not enough memif buffers. There are unreceived data in shared memory.",
110 /* MEMIF_ERR_NOBUF_DET */
111 "Not enough space for memif details in suplied buffer. String data might be malformed.",
112 /* MEMIF_ERR_INT_WRITE */
113 "Send interrupt error.",
114 /* MEMIF_ERR_MFMSG */
115 "Malformed message received on control channel.",
118 /* MEMIF_ERR_PROTO */
119 "Incompatible memory interface protocol version.",
121 "Unmatched interface id.",
122 /* MEMIF_ERR_ACCSLAVE */
123 "Slave cannot accept connection reqest.",
124 /* MEMIF_ERR_ALRCONN */
125 "Interface is already connected.",
128 /* MEMIF_ERR_SECRET */
130 /* MEMIF_ERR_NOSECRET */
132 /* MEMIF_ERR_MAXREG */
133 "Limit on total number of regions reached.",
134 /* MEMIF_ERR_MAXRING */
135 "Limit on total number of ring reached.",
136 /* MEMIF_ERR_NO_INTFD */
137 "Missing interrupt file descriptor. (internal error)",
138 /* MEMIF_ERR_DISCONNECT */
139 "Interface received disconnect request.",
140 /* MEMIF_ERR_DISCONNECTED */
141 "Interface is disconnected.",
142 /* MEMIF_ERR_UNKNOWN_MSG */
143 "Unknown message type received on control channel. (internal error)",
144 /* MEMIF_ERR_POLL_CANCEL */
145 "Memif event polling was canceled.",
146 /* MEMIF_ERR_MAX_RING */
147 "Maximum log2 ring size is 15"
150 #define MEMIF_ERR_UNDEFINED "undefined error"
153 memif_strerror (int err_code)
155 if (err_code >= ERRLIST_LEN)
157 strncpy (memif_buf, MEMIF_ERR_UNDEFINED, strlen (MEMIF_ERR_UNDEFINED));
158 memif_buf[strlen (MEMIF_ERR_UNDEFINED)] = '\0';
162 strncpy (memif_buf, memif_errlist[err_code],
163 strlen (memif_errlist[err_code]));
164 memif_buf[strlen (memif_errlist[err_code])] = '\0';
172 return MEMIF_VERSION;
175 #define DBG_TX_BUF (0)
176 #define DBG_RX_BUF (1)
180 print_bytes (void *data, uint16_t len, uint8_t q)
183 printf ("\nTX:\n\t");
185 printf ("\nRX:\n\t");
187 for (i = 0; i < len; i++)
190 printf ("\n%d:\t", i);
191 printf ("%02X ", ((uint8_t *) (data))[i]);
195 #endif /* MEMIF_DBG_SHM */
198 memif_syscall_error_handler (int err_code)
200 DBG ("%s", strerror (err_code));
203 return MEMIF_ERR_SUCCESS;
204 if (err_code == EACCES)
205 return MEMIF_ERR_ACCES;
206 if (err_code == ENFILE)
207 return MEMIF_ERR_FILE_LIMIT;
208 if (err_code == EMFILE)
209 return MEMIF_ERR_PROC_FILE_LIMIT;
210 if (err_code == ENOMEM)
211 return MEMIF_ERR_NOMEM;
212 /* connection refused if master does not exist
213 this error would spam the user until master was created */
214 if (err_code == ECONNREFUSED)
215 return MEMIF_ERR_SUCCESS;
216 if (err_code == EALREADY)
217 return MEMIF_ERR_ALREADY;
218 if (err_code == EAGAIN)
219 return MEMIF_ERR_AGAIN;
220 if (err_code == EBADF)
221 return MEMIF_ERR_BAD_FD;
222 if (err_code == ENOENT)
223 return MEMIF_ERR_NO_FILE;
225 /* other syscall errors */
226 return MEMIF_ERR_SYSCALL;
230 memif_add_epoll_fd (int fd, uint32_t events)
234 DBG ("invalid fd %d", fd);
237 struct epoll_event evt;
238 memset (&evt, 0, sizeof (evt));
241 if (epoll_ctl (memif_epfd, EPOLL_CTL_ADD, fd, &evt) < 0)
243 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
246 DBG ("fd %d added to epoll", fd);
251 memif_mod_epoll_fd (int fd, uint32_t events)
255 DBG ("invalid fd %d", fd);
258 struct epoll_event evt;
259 memset (&evt, 0, sizeof (evt));
262 if (epoll_ctl (memif_epfd, EPOLL_CTL_MOD, fd, &evt) < 0)
264 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
267 DBG ("fd %d moddified on epoll", fd);
272 memif_del_epoll_fd (int fd)
276 DBG ("invalid fd %d", fd);
279 struct epoll_event evt;
280 memset (&evt, 0, sizeof (evt));
281 if (epoll_ctl (memif_epfd, EPOLL_CTL_DEL, fd, &evt) < 0)
283 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
286 DBG ("fd %d removed from epoll", fd);
291 memif_control_fd_update (int fd, uint8_t events)
293 if (events & MEMIF_FD_EVENT_DEL)
294 return memif_del_epoll_fd (fd);
297 if (events & MEMIF_FD_EVENT_READ)
299 if (events & MEMIF_FD_EVENT_WRITE)
302 if (events & MEMIF_FD_EVENT_MOD)
303 return memif_mod_epoll_fd (fd, evt);
305 return memif_add_epoll_fd (fd, evt);
309 add_list_elt (memif_list_elt_t * e, memif_list_elt_t ** list, uint16_t * len)
311 libmemif_main_t *lm = &libmemif_main;
314 for (i = 0; i < *len; i++)
316 if ((*list)[i].data_struct == NULL)
318 (*list)[i].key = e->key;
319 (*list)[i].data_struct = e->data_struct;
323 memif_list_elt_t *tmp;
324 tmp = realloc (*list, sizeof (memif_list_elt_t) * *len * 2);
328 for (i = *len; i < *len * 2; i++)
331 tmp[i].data_struct = NULL;
334 tmp[*len].key = e->key;
335 tmp[*len].data_struct = e->data_struct;
344 get_list_elt (memif_list_elt_t ** e, memif_list_elt_t * list, uint16_t len,
353 for (i = 0; i < len; i++)
355 if (list[i].key == key)
365 /* does not free memory, only marks element as free */
367 free_list_elt (memif_list_elt_t * list, uint16_t len, int key)
370 for (i = 0; i < len; i++)
372 if (list[i].key == key)
375 list[i].data_struct = NULL;
384 free_list_elt_ctx (memif_list_elt_t * list, uint16_t len,
385 memif_connection_t * ctx)
388 for (i = 0; i < len; i++)
390 if (list[i].key == -1)
392 if (list[i].data_struct == ctx)
394 list[i].data_struct = NULL;
404 memif_control_fd_update_register (memif_control_fd_update_t * cb)
406 libmemif_main_t *lm = &libmemif_main;
407 lm->control_fd_update = cb;
411 memif_alloc_register (memif_alloc_t * ma)
413 libmemif_main_t *lm = &libmemif_main;
418 memif_free_register (memif_free_t * mf)
420 libmemif_main_t *lm = &libmemif_main;
425 memif_init (memif_control_fd_update_t * on_control_fd_update, char *app_name,
426 memif_alloc_t * memif_alloc, memif_free_t * memif_free)
428 int err = MEMIF_ERR_SUCCESS; /* 0 */
429 libmemif_main_t *lm = &libmemif_main;
430 memset (lm, 0, sizeof (libmemif_main_t));
432 if (memif_alloc != NULL)
434 memif_alloc_register (memif_alloc);
437 memif_alloc_register (malloc);
439 if (memif_free != NULL)
440 memif_free_register (memif_free);
442 memif_free_register (free);
444 if (app_name != NULL)
446 uint8_t len = (strlen (app_name) > MEMIF_NAME_LEN)
447 ? strlen (app_name) : MEMIF_NAME_LEN;
448 strncpy ((char *) lm->app_name, app_name, len);
452 strncpy ((char *) lm->app_name, MEMIF_DEFAULT_APP_NAME,
453 strlen (MEMIF_DEFAULT_APP_NAME));
456 /* register control fd update callback */
457 if (on_control_fd_update != NULL)
458 memif_control_fd_update_register (on_control_fd_update);
461 memif_epfd = epoll_create (1);
462 memif_control_fd_update_register (memif_control_fd_update);
463 if ((poll_cancel_fd = eventfd (0, EFD_NONBLOCK)) < 0)
466 DBG ("eventfd: %s", strerror (err));
467 return memif_syscall_error_handler (err);
469 lm->control_fd_update (poll_cancel_fd, MEMIF_FD_EVENT_READ);
470 DBG ("libmemif event polling initialized");
473 lm->control_list_len = 2;
474 lm->interrupt_list_len = 2;
475 lm->listener_list_len = 1;
476 lm->pending_list_len = 1;
479 lm->alloc (sizeof (memif_list_elt_t) * lm->control_list_len);
480 if (lm->control_list == NULL)
482 err = MEMIF_ERR_NOMEM;
486 lm->alloc (sizeof (memif_list_elt_t) * lm->interrupt_list_len);
487 if (lm->interrupt_list == NULL)
489 err = MEMIF_ERR_NOMEM;
493 lm->alloc (sizeof (memif_list_elt_t) * lm->listener_list_len);
494 if (lm->listener_list == NULL)
496 err = MEMIF_ERR_NOMEM;
500 lm->alloc (sizeof (memif_list_elt_t) * lm->pending_list_len);
501 if (lm->pending_list == NULL)
503 err = MEMIF_ERR_NOMEM;
508 for (i = 0; i < lm->control_list_len; i++)
510 lm->control_list[i].key = -1;
511 lm->control_list[i].data_struct = NULL;
513 for (i = 0; i < lm->interrupt_list_len; i++)
515 lm->interrupt_list[i].key = -1;
516 lm->interrupt_list[i].data_struct = NULL;
518 for (i = 0; i < lm->listener_list_len; i++)
520 lm->listener_list[i].key = -1;
521 lm->listener_list[i].data_struct = NULL;
523 for (i = 0; i < lm->pending_list_len; i++)
525 lm->pending_list[i].key = -1;
526 lm->pending_list[i].data_struct = NULL;
529 lm->disconn_slaves = 0;
531 lm->timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK);
534 err = memif_syscall_error_handler (errno);
538 lm->arm.it_value.tv_sec = 2;
539 lm->arm.it_value.tv_nsec = 0;
540 lm->arm.it_interval.tv_sec = 2;
541 lm->arm.it_interval.tv_nsec = 0;
543 if (lm->control_fd_update (lm->timerfd, MEMIF_FD_EVENT_READ) < 0)
545 DBG ("callback type memif_control_fd_update_t error!");
546 err = MEMIF_ERR_CB_FDUPDATE;
557 static inline memif_ring_t *
558 memif_get_ring (memif_connection_t * conn, memif_ring_type_t type,
561 if (&conn->regions[0] == NULL)
563 void *p = conn->regions[0].shm;
565 sizeof (memif_ring_t) +
566 sizeof (memif_desc_t) * (1 << conn->run_args.log2_ring_size);
567 p += (ring_num + type * conn->run_args.num_s2m_rings) * ring_size;
569 return (memif_ring_t *) p;
573 memif_set_rx_mode (memif_conn_handle_t c, memif_rx_mode_t rx_mode,
576 memif_connection_t *conn = (memif_connection_t *) c;
578 return MEMIF_ERR_NOCONN;
580 (conn->args.is_master) ? conn->run_args.num_s2m_rings : conn->run_args.
583 return MEMIF_ERR_QID;
585 conn->rx_queues[qid].ring->flags = rx_mode;
586 DBG ("rx_mode flag: %u", conn->rx_queues[qid].ring->flags);
587 return MEMIF_ERR_SUCCESS;
591 memif_create (memif_conn_handle_t * c, memif_conn_args_t * args,
592 memif_connection_update_t * on_connect,
593 memif_connection_update_t * on_disconnect,
594 memif_interrupt_t * on_interrupt, void *private_ctx)
596 libmemif_main_t *lm = &libmemif_main;
597 int err, i, index, sockfd = -1;
598 memif_list_elt_t list_elt;
599 memif_connection_t *conn = (memif_connection_t *) * c;
602 DBG ("This handle already points to existing memif.");
603 return MEMIF_ERR_CONN;
605 conn = (memif_connection_t *) lm->alloc (sizeof (memif_connection_t));
608 err = MEMIF_ERR_NOMEM;
611 memset (conn, 0, sizeof (memif_connection_t));
613 conn->args.interface_id = args->interface_id;
615 if (args->log2_ring_size == 0)
616 args->log2_ring_size = MEMIF_DEFAULT_LOG2_RING_SIZE;
617 else if (args->log2_ring_size > MEMIF_MAX_LOG2_RING_SIZE)
619 err = MEMIF_ERR_MAX_RING;
622 if (args->buffer_size == 0)
623 args->buffer_size = MEMIF_DEFAULT_BUFFER_SIZE;
624 if (args->num_s2m_rings == 0)
625 args->num_s2m_rings = MEMIF_DEFAULT_TX_QUEUES;
626 if (args->num_m2s_rings == 0)
627 args->num_m2s_rings = MEMIF_DEFAULT_RX_QUEUES;
629 conn->args.num_s2m_rings = args->num_s2m_rings;
630 conn->args.num_m2s_rings = args->num_m2s_rings;
631 conn->args.buffer_size = args->buffer_size;
632 conn->args.log2_ring_size = args->log2_ring_size;
633 conn->args.is_master = args->is_master;
634 conn->args.mode = args->mode;
635 conn->msg_queue = NULL;
636 conn->regions = NULL;
637 conn->tx_queues = NULL;
638 conn->rx_queues = NULL;
640 conn->on_connect = on_connect;
641 conn->on_disconnect = on_disconnect;
642 conn->on_interrupt = on_interrupt;
643 conn->private_ctx = private_ctx;
644 memset (&conn->run_args, 0, sizeof (memif_conn_run_args_t));
646 uint8_t l = strlen ((char *) args->interface_name);
647 strncpy ((char *) conn->args.interface_name, (char *) args->interface_name,
650 /* allocate and initialize socket_filename so it can be copyed to sun_path
651 without memory leaks */
652 conn->args.socket_filename = lm->alloc (sizeof (char *) * 108);
653 if (conn->args.socket_filename == NULL)
655 err = MEMIF_ERR_NOMEM;
658 memset (conn->args.socket_filename, 0, 108 * sizeof (char *));
660 if (args->socket_filename)
662 if (conn->args.socket_filename == NULL)
664 err = memif_syscall_error_handler (errno);
667 strncpy ((char *) conn->args.socket_filename,
668 (char *) args->socket_filename,
669 strlen ((char *) args->socket_filename));
673 uint16_t sdl = strlen (MEMIF_DEFAULT_SOCKET_DIR);
674 uint16_t sfl = strlen (MEMIF_DEFAULT_SOCKET_FILENAME);
675 if (conn->args.socket_filename == NULL)
677 err = memif_syscall_error_handler (errno);
680 strncpy ((char *) conn->args.socket_filename,
681 MEMIF_DEFAULT_SOCKET_DIR, sdl);
682 conn->args.socket_filename[sdl] = '/';
683 strncpy ((char *) (conn->args.socket_filename + 1 + sdl),
684 MEMIF_DEFAULT_SOCKET_FILENAME, sfl);
689 l = strlen ((char *) args->secret);
690 strncpy ((char *) conn->args.secret, (char *) args->secret, l);
693 if (conn->args.is_master)
695 conn->run_args.buffer_size = conn->args.buffer_size;
697 memif_list_elt_t elt;
698 for (i = 0; i < lm->listener_list_len; i++)
701 (memif_socket_t *) lm->listener_list[i].data_struct) != NULL)
704 ((char *) ms->filename, (char *) conn->args.socket_filename,
705 strlen ((char *) ms->filename)) == 0)
707 /* add interface to listener socket */
708 elt.key = conn->args.interface_id;
709 *c = elt.data_struct = conn;
710 add_list_elt (&elt, &ms->interface_list,
711 &ms->interface_list_len);
713 conn->listener_fd = ms->fd;
719 struct stat file_stat;
720 if (stat ((char *) conn->args.socket_filename, &file_stat) == 0)
722 if (S_ISSOCK (file_stat.st_mode))
723 unlink ((char *) conn->args.socket_filename);
725 return memif_syscall_error_handler (errno);
727 DBG ("creating socket file");
728 ms = lm->alloc (sizeof (memif_socket_t));
731 err = MEMIF_ERR_NOMEM;
735 lm->alloc (strlen ((char *) conn->args.socket_filename) +
737 if (ms->filename == NULL)
739 err = MEMIF_ERR_NOMEM;
742 memset (ms->filename, 0,
743 strlen ((char *) conn->args.socket_filename) +
745 strncpy ((char *) ms->filename,
746 (char *) conn->args.socket_filename,
747 strlen ((char *) conn->args.socket_filename));
748 ms->interface_list_len = 1;
750 lm->alloc (sizeof (memif_list_elt_t) *
751 ms->interface_list_len);
752 if (ms->interface_list == NULL)
754 err = MEMIF_ERR_NOMEM;
757 ms->interface_list[0].key = -1;
758 ms->interface_list[0].data_struct = NULL;
759 struct sockaddr_un un = { 0 };
762 ms->fd = socket (AF_UNIX, SOCK_SEQPACKET, 0);
765 err = memif_syscall_error_handler (errno);
768 DBG ("socket %d created", ms->fd);
769 un.sun_family = AF_UNIX;
770 strncpy ((char *) un.sun_path, (char *) ms->filename,
771 sizeof (un.sun_path) - 1);
774 (ms->fd, SOL_SOCKET, SO_PASSCRED, &on, sizeof (on)) < 0)
776 err = memif_syscall_error_handler (errno);
780 if (bind (ms->fd, (struct sockaddr *) &un, sizeof (un)) < 0)
782 err = memif_syscall_error_handler (errno);
786 if (listen (ms->fd, 1) < 0)
788 err = memif_syscall_error_handler (errno);
792 if (stat ((char *) ms->filename, &file_stat) < 0)
794 err = memif_syscall_error_handler (errno);
798 /* add interface to listener socket */
799 elt.key = conn->args.interface_id;
800 *c = elt.data_struct = conn;
801 add_list_elt (&elt, &ms->interface_list,
802 &ms->interface_list_len);
804 conn->listener_fd = ms->fd;
806 /* add listener socket to libmemif main */
808 elt.data_struct = ms;
809 add_list_elt (&elt, &lm->listener_list, &lm->listener_list_len);
810 lm->control_fd_update (ms->fd, MEMIF_FD_EVENT_READ);
817 if (lm->disconn_slaves == 0)
819 if (timerfd_settime (lm->timerfd, 0, &lm->arm, NULL) < 0)
821 err = memif_syscall_error_handler (errno);
826 lm->disconn_slaves++;
829 *c = list_elt.data_struct = conn;
831 add_list_elt (&list_elt, &lm->control_list,
832 &lm->control_list_len)) < 0)
834 err = MEMIF_ERR_NOMEM;
847 if (conn->args.socket_filename)
848 lm->free (conn->args.socket_filename);
856 memif_control_fd_handler (int fd, uint8_t events)
858 int i, rv, sockfd = -1, err = MEMIF_ERR_SUCCESS; /* 0 */
860 memif_list_elt_t *e = NULL;
861 memif_connection_t *conn;
862 libmemif_main_t *lm = &libmemif_main;
863 if (fd == lm->timerfd)
867 size = read (fd, &b, sizeof (b));
868 for (i = 0; i < lm->control_list_len; i++)
870 if ((lm->control_list[i].key < 0)
871 && (lm->control_list[i].data_struct != NULL))
873 conn = lm->control_list[i].data_struct;
874 if (conn->args.is_master)
877 struct sockaddr_un sun;
878 sockfd = socket (AF_UNIX, SOCK_SEQPACKET, 0);
881 err = memif_syscall_error_handler (errno);
885 sun.sun_family = AF_UNIX;
887 strncpy (sun.sun_path, conn->args.socket_filename,
888 sizeof (sun.sun_path) - 1);
890 if (connect (sockfd, (struct sockaddr *) &sun,
891 sizeof (struct sockaddr_un)) == 0)
894 conn->read_fn = memif_conn_fd_read_ready;
895 conn->write_fn = memif_conn_fd_write_ready;
896 conn->error_fn = memif_conn_fd_error;
898 lm->control_list[conn->index].key = conn->fd;
900 lm->control_fd_update (sockfd,
901 MEMIF_FD_EVENT_READ |
902 MEMIF_FD_EVENT_WRITE);
904 lm->disconn_slaves--;
905 if (lm->disconn_slaves == 0)
907 if (timerfd_settime (lm->timerfd, 0, &lm->disarm, NULL)
910 err = memif_syscall_error_handler (errno);
917 err = memif_syscall_error_handler (errno);
925 get_list_elt (&e, lm->interrupt_list, lm->interrupt_list_len, fd);
928 if (((memif_connection_t *) e->data_struct)->on_interrupt != NULL)
931 (((memif_connection_t *) e->data_struct)->args.
932 is_master) ? ((memif_connection_t *) e->data_struct)->
933 run_args.num_s2m_rings : ((memif_connection_t *) e->
934 data_struct)->run_args.
936 for (i = 0; i < num; i++)
938 if (((memif_connection_t *) e->data_struct)->rx_queues[i].
941 ((memif_connection_t *) e->
942 data_struct)->on_interrupt ((void *) e->data_struct,
943 ((memif_connection_t *)
946 return MEMIF_ERR_SUCCESS;
950 return MEMIF_ERR_SUCCESS;
952 get_list_elt (&e, lm->listener_list, lm->listener_list_len, fd);
955 memif_conn_fd_accept_ready ((memif_socket_t *) e->data_struct);
956 return MEMIF_ERR_SUCCESS;
959 get_list_elt (&e, lm->pending_list, lm->pending_list_len, fd);
962 memif_read_ready (fd);
963 return MEMIF_ERR_SUCCESS;
966 get_list_elt (&e, lm->control_list, lm->control_list_len, fd);
969 if (events & MEMIF_FD_EVENT_READ)
972 ((memif_connection_t *) e->data_struct)->read_fn (e->
974 if (err != MEMIF_ERR_SUCCESS)
977 if (events & MEMIF_FD_EVENT_WRITE)
980 ((memif_connection_t *) e->data_struct)->write_fn (e->
982 if (err != MEMIF_ERR_SUCCESS)
985 if (events & MEMIF_FD_EVENT_ERROR)
988 ((memif_connection_t *) e->data_struct)->error_fn (e->
990 if (err != MEMIF_ERR_SUCCESS)
996 return MEMIF_ERR_SUCCESS; /* 0 */
1006 memif_poll_event (int timeout)
1008 libmemif_main_t *lm = &libmemif_main;
1009 memif_list_elt_t *elt;
1010 struct epoll_event evt, *e;
1011 int en = 0, err = MEMIF_ERR_SUCCESS, i = 0; /* 0 */
1013 uint32_t events = 0;
1014 uint64_t counter = 0;
1016 memset (&evt, 0, sizeof (evt));
1017 evt.events = EPOLLIN | EPOLLOUT;
1019 sigemptyset (&sigset);
1020 en = epoll_pwait (memif_epfd, &evt, 1, timeout, &sigset);
1024 DBG ("epoll_pwait: %s", strerror (err));
1025 return memif_syscall_error_handler (err);
1029 if (evt.data.fd == poll_cancel_fd)
1031 r = read (evt.data.fd, &counter, sizeof (counter));
1032 return MEMIF_ERR_POLL_CANCEL;
1034 if (evt.events & EPOLLIN)
1035 events |= MEMIF_FD_EVENT_READ;
1036 if (evt.events & EPOLLOUT)
1037 events |= MEMIF_FD_EVENT_WRITE;
1038 if (evt.events & EPOLLERR)
1039 events |= MEMIF_FD_EVENT_ERROR;
1040 err = memif_control_fd_handler (evt.data.fd, events);
1047 memif_cancel_poll_event ()
1049 uint64_t counter = 1;
1052 if (poll_cancel_fd == -1)
1054 w = write (poll_cancel_fd, &counter, sizeof (counter));
1055 if (w < sizeof (counter))
1056 return MEMIF_ERR_INT_WRITE;
1062 memif_msg_queue_free (libmemif_main_t * lm, memif_msg_queue_elt_t ** e)
1066 memif_msg_queue_free (lm, &(*e)->next);
1072 /* send disconnect msg and close interface */
1074 memif_disconnect_internal (memif_connection_t * c)
1078 DBG ("no connection");
1079 return MEMIF_ERR_NOCONN;
1082 int err = MEMIF_ERR_SUCCESS, i; /* 0 */
1084 libmemif_main_t *lm = &libmemif_main;
1085 memif_list_elt_t *e;
1087 c->on_disconnect ((void *) c, c->private_ctx);
1091 memif_msg_send_disconnect (c->fd, "interface deleted", 0);
1092 lm->control_fd_update (c->fd, MEMIF_FD_EVENT_DEL);
1095 get_list_elt (&e, lm->control_list, lm->control_list_len, c->fd);
1098 if (c->args.is_master)
1099 free_list_elt (lm->control_list, lm->control_list_len, c->fd);
1100 e->key = c->fd = -1;
1103 if (c->tx_queues != NULL)
1106 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1108 for (i = 0; i < num; i++)
1110 mq = &c->tx_queues[i];
1115 free_list_elt (lm->interrupt_list, lm->interrupt_list_len,
1120 lm->free (c->tx_queues);
1121 c->tx_queues = NULL;
1124 if (c->rx_queues != NULL)
1127 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1129 for (i = 0; i < num; i++)
1131 mq = &c->rx_queues[i];
1136 if (c->on_interrupt != NULL)
1137 lm->control_fd_update (mq->int_fd, MEMIF_FD_EVENT_DEL);
1140 free_list_elt (lm->interrupt_list, lm->interrupt_list_len,
1145 lm->free (c->rx_queues);
1146 c->rx_queues = NULL;
1149 if (c->regions != NULL)
1151 if (munmap (c->regions[0].shm, c->regions[0].region_size) < 0)
1152 return memif_syscall_error_handler (errno);
1153 if (c->regions[0].fd > 0)
1154 close (c->regions[0].fd);
1155 c->regions[0].fd = -1;
1156 lm->free (c->regions);
1160 memset (&c->run_args, 0, sizeof (memif_conn_run_args_t));
1162 memif_msg_queue_free (lm, &c->msg_queue);
1164 if (!(c->args.is_master))
1166 if (lm->disconn_slaves == 0)
1168 if (timerfd_settime (lm->timerfd, 0, &lm->arm, NULL) < 0)
1170 err = memif_syscall_error_handler (errno);
1171 DBG ("timerfd_settime: arm");
1174 lm->disconn_slaves++;
1181 memif_delete (memif_conn_handle_t * conn)
1183 memif_connection_t *c = (memif_connection_t *) * conn;
1186 DBG ("no connection");
1187 return MEMIF_ERR_NOCONN;
1189 libmemif_main_t *lm = &libmemif_main;
1190 memif_list_elt_t *e = NULL;
1191 memif_socket_t *ms = NULL;
1193 int err = MEMIF_ERR_SUCCESS;
1197 DBG ("DISCONNECTING");
1198 err = memif_disconnect_internal (c);
1199 if (err == MEMIF_ERR_NOCONN)
1203 free_list_elt_ctx (lm->control_list, lm->control_list_len, c);
1205 if (c->args.is_master)
1207 get_list_elt (&e, lm->listener_list, lm->listener_list_len,
1211 ms = (memif_socket_t *) e->data_struct;
1213 free_list_elt (ms->interface_list, ms->interface_list_len,
1214 c->args.interface_id);
1215 if (ms->use_count <= 0)
1217 lm->control_fd_update (c->listener_fd, MEMIF_FD_EVENT_DEL);
1218 free_list_elt (lm->listener_list, lm->listener_list_len,
1220 close (c->listener_fd);
1221 c->listener_fd = ms->fd = -1;
1222 lm->free (ms->interface_list);
1223 ms->interface_list = NULL;
1224 lm->free (ms->filename);
1225 ms->filename = NULL;
1233 lm->disconn_slaves--;
1234 if (lm->disconn_slaves <= 0)
1236 if (timerfd_settime (lm->timerfd, 0, &lm->disarm, NULL) < 0)
1238 err = memif_syscall_error_handler (errno);
1239 DBG ("timerfd_settime: disarm");
1244 if (c->args.socket_filename)
1245 lm->free (c->args.socket_filename);
1246 c->args.socket_filename = NULL;
1256 memif_connect1 (memif_connection_t * c)
1258 libmemif_main_t *lm = &libmemif_main;
1259 memif_region_t *mr = c->regions;
1269 return MEMIF_ERR_NO_SHMFD;
1271 if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
1272 MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
1274 return memif_syscall_error_handler (errno);
1280 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1282 for (i = 0; i < num; i++)
1284 mq = &c->tx_queues[i];
1287 mq->ring = c->regions[mq->region].shm + mq->offset;
1288 if (mq->ring->cookie != MEMIF_COOKIE)
1290 DBG ("wrong cookie on tx ring %u", i);
1291 return MEMIF_ERR_COOKIE;
1293 mq->ring->head = mq->ring->tail = mq->last_head = mq->alloc_bufs =
1298 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1300 for (i = 0; i < num; i++)
1302 mq = &c->rx_queues[i];
1305 mq->ring = c->regions[mq->region].shm + mq->offset;
1306 if (mq->ring->cookie != MEMIF_COOKIE)
1308 DBG ("wrong cookie on rx ring %u", i);
1309 return MEMIF_ERR_COOKIE;
1311 mq->ring->head = mq->ring->tail = mq->last_head = mq->alloc_bufs =
1316 lm->control_fd_update (c->fd, MEMIF_FD_EVENT_READ | MEMIF_FD_EVENT_MOD);
1322 memif_init_regions_and_queues (memif_connection_t * conn)
1324 memif_ring_t *ring = NULL;
1325 uint64_t buffer_offset;
1328 libmemif_main_t *lm = &libmemif_main;
1331 conn->regions = (memif_region_t *) lm->alloc (sizeof (memif_region_t));
1332 if (conn->regions == NULL)
1333 return MEMIF_ERR_NOMEM;
1337 (conn->run_args.num_s2m_rings +
1338 conn->run_args.num_m2s_rings) * (sizeof (memif_ring_t) +
1339 sizeof (memif_desc_t) *
1340 (1 << conn->run_args.log2_ring_size));
1342 r->region_size = buffer_offset +
1343 conn->run_args.buffer_size * (1 << conn->run_args.log2_ring_size) *
1344 (conn->run_args.num_s2m_rings + conn->run_args.num_m2s_rings);
1347 memif_memfd_create ("memif region 0", MFD_ALLOW_SEALING)) == -1)
1348 return memif_syscall_error_handler (errno);
1350 if ((fcntl (r->fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
1351 return memif_syscall_error_handler (errno);
1353 if ((ftruncate (r->fd, r->region_size)) == -1)
1354 return memif_syscall_error_handler (errno);
1356 if ((r->shm = mmap (NULL, r->region_size, PROT_READ | PROT_WRITE,
1357 MAP_SHARED, r->fd, 0)) == MAP_FAILED)
1358 return memif_syscall_error_handler (errno);
1360 for (i = 0; i < conn->run_args.num_s2m_rings; i++)
1362 ring = memif_get_ring (conn, MEMIF_RING_S2M, i);
1363 DBG ("RING: %p I: %d", ring, i);
1364 ring->head = ring->tail = 0;
1365 ring->cookie = MEMIF_COOKIE;
1367 for (j = 0; j < (1 << conn->run_args.log2_ring_size); j++)
1369 uint16_t slot = i * (1 << conn->run_args.log2_ring_size) + j;
1370 ring->desc[j].region = 0;
1371 ring->desc[j].offset = buffer_offset +
1372 (uint32_t) (slot * conn->run_args.buffer_size);
1373 ring->desc[j].length = conn->run_args.buffer_size;
1376 for (i = 0; i < conn->run_args.num_m2s_rings; i++)
1378 ring = memif_get_ring (conn, MEMIF_RING_M2S, i);
1379 DBG ("RING: %p I: %d", ring, i);
1380 ring->head = ring->tail = 0;
1381 ring->cookie = MEMIF_COOKIE;
1383 for (j = 0; j < (1 << conn->run_args.log2_ring_size); j++)
1387 conn->run_args.num_s2m_rings) *
1388 (1 << conn->run_args.log2_ring_size) + j;
1389 ring->desc[j].region = 0;
1390 ring->desc[j].offset = buffer_offset +
1391 (uint32_t) (slot * conn->run_args.buffer_size);
1392 ring->desc[j].length = conn->run_args.buffer_size;
1397 (memif_queue_t *) lm->alloc (sizeof (memif_queue_t) *
1398 conn->run_args.num_s2m_rings);
1400 return MEMIF_ERR_NOMEM;
1402 for (x = 0; x < conn->run_args.num_s2m_rings; x++)
1404 if ((mq[x].int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
1405 return memif_syscall_error_handler (errno);
1406 /* add int fd to interrupt fd list */
1407 e.key = mq[x].int_fd;
1408 e.data_struct = conn;
1409 add_list_elt (&e, &lm->interrupt_list, &lm->interrupt_list_len);
1411 mq[x].ring = memif_get_ring (conn, MEMIF_RING_S2M, x);
1412 DBG ("RING: %p I: %d", mq[x].ring, x);
1413 mq[x].log2_ring_size = conn->run_args.log2_ring_size;
1416 (void *) mq[x].ring - (void *) conn->regions[mq->region].shm;
1417 mq[x].last_head = 0;
1418 mq[x].last_tail = 0;
1419 mq[x].alloc_bufs = 0;
1421 conn->tx_queues = mq;
1424 (memif_queue_t *) lm->alloc (sizeof (memif_queue_t) *
1425 conn->run_args.num_m2s_rings);
1427 return MEMIF_ERR_NOMEM;
1428 for (x = 0; x < conn->run_args.num_m2s_rings; x++)
1430 if ((mq[x].int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
1431 return memif_syscall_error_handler (errno);
1432 /* add int fd to interrupt fd list */
1433 e.key = mq[x].int_fd;
1434 e.data_struct = conn;
1435 add_list_elt (&e, &lm->interrupt_list, &lm->interrupt_list_len);
1437 mq[x].ring = memif_get_ring (conn, MEMIF_RING_M2S, x);
1438 DBG ("RING: %p I: %d", mq[x].ring, x);
1439 mq[x].log2_ring_size = conn->run_args.log2_ring_size;
1442 (void *) mq[x].ring - (void *) conn->regions[mq->region].shm;
1443 mq[x].last_head = 0;
1444 mq[x].last_tail = 0;
1445 mq[x].alloc_bufs = 0;
1447 conn->rx_queues = mq;
1453 memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid,
1454 memif_buffer_t * bufs, uint16_t count,
1455 uint16_t * count_out, uint16_t size)
1457 memif_connection_t *c = (memif_connection_t *) conn;
1458 if (EXPECT_FALSE (c == NULL))
1459 return MEMIF_ERR_NOCONN;
1460 if (EXPECT_FALSE (c->fd < 0))
1461 return MEMIF_ERR_DISCONNECTED;
1463 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1465 if (EXPECT_FALSE (qid >= num))
1466 return MEMIF_ERR_QID;
1467 if (EXPECT_FALSE (!count_out))
1468 return MEMIF_ERR_INVAL_ARG;
1470 memif_queue_t *mq = &c->tx_queues[qid];
1471 memif_ring_t *ring = mq->ring;
1472 memif_buffer_t *b0, *b1;
1473 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1476 int i, err = MEMIF_ERR_SUCCESS; /* 0 */
1477 uint16_t dst_left, src_left;
1478 uint16_t saved_count;
1479 memif_buffer_t *saved_b;
1482 ring_size = (1 << mq->log2_ring_size);
1483 ns = ring->tail - mq->last_tail;
1484 mq->last_tail += ns;
1485 slot = (c->args.is_master) ? ring->tail : ring->head;
1486 slot += mq->alloc_bufs;
1488 if (c->args.is_master)
1489 ns = ring->head + mq->alloc_bufs - ring->tail;
1491 ns = ring_size - ring->head + mq->alloc_bufs + mq->last_tail;
1495 b0 = (bufs + *count_out);
1498 saved_count = count;
1500 b0->desc_index = slot;
1501 ring->desc[slot & mask].flags = 0;
1503 /* slave can produce buffer with original length */
1504 dst_left = (c->args.is_master) ? ring->desc[slot & mask].length : c->run_args.buffer_size; /* - headroom */
1519 ring->desc[b0->desc_index & mask].flags |=
1520 MEMIF_DESC_FLAG_NEXT;
1521 b0->flags |= MEMIF_BUFFER_FLAG_NEXT;
1523 b0 = (bufs + *count_out);
1524 b0->desc_index = slot;
1525 dst_left = (c->args.is_master) ? ring->desc[slot & mask].length : c->run_args.buffer_size; /* - headroom */
1526 ring->desc[slot & mask].flags = 0;
1530 /* rollback allocated chain buffers */
1531 memset (saved_b, 0, sizeof (memif_buffer_t)
1532 * (saved_count - count + 1));
1533 *count_out -= saved_count - count;
1534 mq->alloc_bufs = saved_count - count;
1538 b0->len = memif_min (dst_left, src_left);
1539 b0->data = memif_get_buffer (c, ring, slot & mask);
1541 src_left -= b0->len;
1542 dst_left -= b0->len;
1554 DBG ("allocated: %u/%u bufs. Total %u allocated bufs", *count_out, count,
1559 DBG ("ring buffer full! qid: %u", qid);
1560 err = MEMIF_ERR_NOBUF_RING;
1567 memif_refill_queue (memif_conn_handle_t conn, uint16_t qid, uint16_t count)
1569 memif_connection_t *c = (memif_connection_t *) conn;
1570 if (EXPECT_FALSE (c == NULL))
1571 return MEMIF_ERR_NOCONN;
1572 if (EXPECT_FALSE (c->fd < 0))
1573 return MEMIF_ERR_DISCONNECTED;
1575 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1577 if (EXPECT_FALSE (qid >= num))
1578 return MEMIF_ERR_QID;
1579 libmemif_main_t *lm = &libmemif_main;
1580 memif_queue_t *mq = &c->rx_queues[qid];
1581 memif_ring_t *ring = mq->ring;
1583 if (c->args.is_master)
1585 MEMIF_MEMORY_BARRIER ();
1587 (ring->tail + count <=
1588 mq->last_head) ? ring->tail + count : mq->last_head;
1592 uint16_t head = ring->head;
1593 uint16_t ns = (1 << mq->log2_ring_size) - head + mq->last_tail;
1595 MEMIF_MEMORY_BARRIER ();
1596 ring->head = (ring->head + count <= head) ? ring->head + count : head;
1599 return MEMIF_ERR_SUCCESS; /* 0 */
1603 memif_tx_burst (memif_conn_handle_t conn, uint16_t qid,
1604 memif_buffer_t * bufs, uint16_t count, uint16_t * tx)
1606 memif_connection_t *c = (memif_connection_t *) conn;
1607 if (EXPECT_FALSE (c == NULL))
1608 return MEMIF_ERR_NOCONN;
1609 if (EXPECT_FALSE (c->fd < 0))
1610 return MEMIF_ERR_DISCONNECTED;
1612 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1614 if (EXPECT_FALSE (qid >= num))
1615 return MEMIF_ERR_QID;
1616 if (EXPECT_FALSE (!tx))
1617 return MEMIF_ERR_INVAL_ARG;
1619 memif_queue_t *mq = &c->tx_queues[qid];
1620 memif_ring_t *ring = mq->ring;
1623 slot = (c->args.is_master) ? ring->tail : ring->head;
1624 *tx = (count <= mq->alloc_bufs) ? count : mq->alloc_bufs;
1626 #ifdef MEMIF_DBG_SHM
1627 uint16_t curr_buf = 0;
1628 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1630 for (curr_buf = 0; curr_buf < count; curr_buf++)
1632 b0 = (bufs + curr_buf);
1633 print_bytes (memif_get_buffer (c, ring, b0->desc_index & mask),
1634 ring->desc[b0->desc_index & mask].length, DBG_TX_BUF);
1637 #endif /* MEMIF_DBG_SHM */
1639 MEMIF_MEMORY_BARRIER ();
1640 if (c->args.is_master)
1641 ring->tail = slot + *tx;
1643 ring->head = slot + *tx;
1645 /* zero out buffer fields so the client cant modify transmitted data */
1646 memset (bufs, 0, sizeof (memif_buffer_t) * *tx);
1648 mq->alloc_bufs -= *tx;
1650 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0)
1653 int r = write (mq->int_fd, &a, sizeof (a));
1655 return MEMIF_ERR_INT_WRITE;
1658 return MEMIF_ERR_SUCCESS; /* 0 */
1662 memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
1663 memif_buffer_t * bufs, uint16_t count, uint16_t * rx)
1665 memif_connection_t *c = (memif_connection_t *) conn;
1666 if (EXPECT_FALSE (c == NULL))
1667 return MEMIF_ERR_NOCONN;
1668 if (EXPECT_FALSE (c->fd < 0))
1669 return MEMIF_ERR_DISCONNECTED;
1671 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1673 if (EXPECT_FALSE (qid >= num))
1674 return MEMIF_ERR_QID;
1675 if (EXPECT_FALSE (!rx))
1676 return MEMIF_ERR_INVAL_ARG;
1678 memif_queue_t *mq = &c->rx_queues[qid];
1679 memif_ring_t *ring = mq->ring;
1680 uint16_t cur_slot, last_slot;
1682 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1683 memif_buffer_t *b0, *b1;
1687 ssize_t r = read (mq->int_fd, &b, sizeof (b));
1688 if ((r == -1) && (errno != EAGAIN))
1689 return memif_syscall_error_handler (errno);
1691 cur_slot = (c->args.is_master) ? mq->last_head : mq->last_tail;
1692 last_slot = (c->args.is_master) ? ring->head : ring->tail;
1693 if (cur_slot == last_slot)
1694 return MEMIF_ERR_SUCCESS;
1696 ns = last_slot - cur_slot;
1702 b0->desc_index = cur_slot;
1703 b0->data = memif_get_buffer (c, ring, cur_slot & mask);
1704 b0->len = ring->desc[cur_slot & mask].length;
1705 /* slave resets buffer length */
1706 if (c->args.is_master == 0)
1708 ring->desc[cur_slot & mask].length = c->run_args.buffer_size;
1710 if (ring->desc[cur_slot & mask].flags & MEMIF_DESC_FLAG_NEXT)
1712 b0->flags = MEMIF_BUFFER_FLAG_NEXT;
1713 ring->desc[cur_slot & mask].flags &= ~MEMIF_DESC_FLAG_NEXT;
1716 #ifdef MEMIF_DBG_SHM
1717 print_bytes (b0->data, b0->len, DBG_RX_BUF);
1718 #endif /* MEMIF_DBG_SHM */
1726 if (c->args.is_master)
1727 mq->last_head = cur_slot;
1729 mq->last_tail = cur_slot;
1733 DBG ("not enough buffers!");
1734 return MEMIF_ERR_NOBUF;
1737 return MEMIF_ERR_SUCCESS; /* 0 */
1741 memif_get_details (memif_conn_handle_t conn, memif_details_t * md,
1742 char *buf, ssize_t buflen)
1744 libmemif_main_t *lm = &libmemif_main;
1745 memif_connection_t *c = (memif_connection_t *) conn;
1747 return MEMIF_ERR_NOCONN;
1749 int err = MEMIF_ERR_SUCCESS, i;
1750 ssize_t l0, l1, total_l;
1753 l1 = strlen ((char *) c->args.interface_name);
1754 if (l0 + l1 < buflen)
1756 md->if_name = strcpy (buf + l0, (char *) c->args.interface_name);
1760 err = MEMIF_ERR_NOBUF_DET;
1762 l1 = strlen ((char *) lm->app_name);
1763 if (l0 + l1 < buflen)
1765 md->inst_name = strcpy (buf + l0, (char *) lm->app_name);
1769 err = MEMIF_ERR_NOBUF_DET;
1771 l1 = strlen ((char *) c->remote_if_name);
1772 if (l0 + l1 < buflen)
1774 md->remote_if_name = strcpy (buf + l0, (char *) c->remote_if_name);
1778 err = MEMIF_ERR_NOBUF_DET;
1780 l1 = strlen ((char *) c->remote_name);
1781 if (l0 + l1 < buflen)
1783 md->remote_inst_name = strcpy (buf + l0, (char *) c->remote_name);
1787 err = MEMIF_ERR_NOBUF_DET;
1789 md->id = c->args.interface_id;
1793 l1 = strlen ((char *) c->args.secret);
1794 if (l0 + l1 < buflen)
1796 md->secret = strcpy (buf + l0, (char *) c->args.secret);
1800 err = MEMIF_ERR_NOBUF_DET;
1803 md->role = (c->args.is_master) ? 0 : 1;
1804 md->mode = c->args.mode;
1806 l1 = strlen ((char *) c->args.socket_filename);
1807 if (l0 + l1 < buflen)
1809 md->socket_filename =
1810 strcpy (buf + l0, (char *) c->args.socket_filename);
1814 err = MEMIF_ERR_NOBUF_DET;
1817 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1820 l1 = sizeof (memif_queue_details_t) * md->rx_queues_num;
1821 if (l0 + l1 <= buflen)
1823 md->rx_queues = (memif_queue_details_t *) buf + l0;
1827 err = MEMIF_ERR_NOBUF_DET;
1829 for (i = 0; i < md->rx_queues_num; i++)
1831 md->rx_queues[i].qid = i;
1832 md->rx_queues[i].ring_size = (1 << c->rx_queues[i].log2_ring_size);
1833 md->rx_queues[i].flags = c->rx_queues[i].ring->flags;
1834 md->rx_queues[i].head = c->rx_queues[i].ring->head;
1835 md->rx_queues[i].tail = c->rx_queues[i].ring->tail;
1836 md->rx_queues[i].buffer_size = c->run_args.buffer_size;
1840 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1843 l1 = sizeof (memif_queue_details_t) * md->tx_queues_num;
1844 if (l0 + l1 <= buflen)
1846 md->tx_queues = (memif_queue_details_t *) buf + l0;
1850 err = MEMIF_ERR_NOBUF_DET;
1852 for (i = 0; i < md->tx_queues_num; i++)
1854 md->tx_queues[i].qid = i;
1855 md->tx_queues[i].ring_size = (1 << c->tx_queues[i].log2_ring_size);
1856 md->tx_queues[i].flags = c->tx_queues[i].ring->flags;
1857 md->tx_queues[i].head = c->tx_queues[i].ring->head;
1858 md->tx_queues[i].tail = c->tx_queues[i].ring->tail;
1859 md->tx_queues[i].buffer_size = c->run_args.buffer_size;
1862 md->link_up_down = (c->fd > 0) ? 1 : 0;
1868 memif_get_queue_efd (memif_conn_handle_t conn, uint16_t qid, int *efd)
1870 memif_connection_t *c = (memif_connection_t *) conn;
1873 return MEMIF_ERR_NOCONN;
1875 return MEMIF_ERR_DISCONNECTED;
1877 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1880 return MEMIF_ERR_QID;
1882 *efd = c->rx_queues[qid].int_fd;
1884 return MEMIF_ERR_SUCCESS;
1890 libmemif_main_t *lm = &libmemif_main;
1891 if (lm->control_list)
1892 lm->free (lm->control_list);
1893 lm->control_list = NULL;
1894 if (lm->interrupt_list)
1895 lm->free (lm->interrupt_list);
1896 lm->interrupt_list = NULL;
1897 if (lm->listener_list)
1898 lm->free (lm->listener_list);
1899 lm->listener_list = NULL;
1900 if (lm->pending_list)
1901 lm->free (lm->pending_list);
1902 lm->pending_list = NULL;
1903 if (poll_cancel_fd != -1)
1904 close (poll_cancel_fd);
1906 return MEMIF_ERR_SUCCESS; /* 0 */