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';
169 #define DBG_TX_BUF (0)
170 #define DBG_RX_BUF (1)
174 print_bytes (void *data, uint16_t len, uint8_t q)
177 printf ("\nTX:\n\t");
179 printf ("\nRX:\n\t");
181 for (i = 0; i < len; i++)
184 printf ("\n%d:\t", i);
185 printf ("%02X ", ((uint8_t *) (data))[i]);
189 #endif /* MEMIF_DBG_SHM */
192 memif_syscall_error_handler (int err_code)
194 DBG_UNIX ("%s", strerror (err_code));
197 return MEMIF_ERR_SUCCESS;
198 if (err_code == EACCES)
199 return MEMIF_ERR_ACCES;
200 if (err_code == ENFILE)
201 return MEMIF_ERR_FILE_LIMIT;
202 if (err_code == EMFILE)
203 return MEMIF_ERR_PROC_FILE_LIMIT;
204 if (err_code == ENOMEM)
205 return MEMIF_ERR_NOMEM;
206 /* connection refused if master does not exist
207 this error would spam the user until master was created */
208 if (err_code == ECONNREFUSED)
209 return MEMIF_ERR_SUCCESS;
210 if (err_code == EALREADY)
211 return MEMIF_ERR_ALREADY;
212 if (err_code == EAGAIN)
213 return MEMIF_ERR_AGAIN;
214 if (err_code == EBADF)
215 return MEMIF_ERR_BAD_FD;
216 if (err_code == ENOENT)
217 return MEMIF_ERR_NO_FILE;
219 /* other syscall errors */
220 return MEMIF_ERR_SYSCALL;
224 memif_add_epoll_fd (int fd, uint32_t events)
228 DBG ("invalid fd %d", fd);
231 struct epoll_event evt;
232 memset (&evt, 0, sizeof (evt));
235 if (epoll_ctl (memif_epfd, EPOLL_CTL_ADD, fd, &evt) < 0)
237 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
240 DBG ("fd %d added to epoll", fd);
245 memif_mod_epoll_fd (int fd, uint32_t events)
249 DBG ("invalid fd %d", fd);
252 struct epoll_event evt;
253 memset (&evt, 0, sizeof (evt));
256 if (epoll_ctl (memif_epfd, EPOLL_CTL_MOD, fd, &evt) < 0)
258 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
261 DBG ("fd %d moddified on epoll", fd);
266 memif_del_epoll_fd (int fd)
270 DBG ("invalid fd %d", fd);
273 struct epoll_event evt;
274 memset (&evt, 0, sizeof (evt));
275 if (epoll_ctl (memif_epfd, EPOLL_CTL_DEL, fd, &evt) < 0)
277 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
280 DBG ("fd %d removed from epoll", fd);
285 memif_control_fd_update (int fd, uint8_t events)
287 if (events & MEMIF_FD_EVENT_DEL)
288 return memif_del_epoll_fd (fd);
291 if (events & MEMIF_FD_EVENT_READ)
293 if (events & MEMIF_FD_EVENT_WRITE)
296 if (events & MEMIF_FD_EVENT_MOD)
297 return memif_mod_epoll_fd (fd, evt);
299 return memif_add_epoll_fd (fd, evt);
303 add_list_elt (memif_list_elt_t * e, memif_list_elt_t ** list, uint16_t * len)
305 libmemif_main_t *lm = &libmemif_main;
308 for (i = 0; i < *len; i++)
310 if ((*list)[i].data_struct == NULL)
312 (*list)[i].key = e->key;
313 (*list)[i].data_struct = e->data_struct;
317 memif_list_elt_t *tmp;
318 tmp = realloc (*list, sizeof (memif_list_elt_t) * *len * 2);
322 for (i = *len; i < *len * 2; i++)
325 tmp[i].data_struct = NULL;
328 tmp[*len].key = e->key;
329 tmp[*len].data_struct = e->data_struct;
338 get_list_elt (memif_list_elt_t ** e, memif_list_elt_t * list, uint16_t len,
347 for (i = 0; i < len; i++)
349 if (list[i].key == key)
359 /* does not free memory, only marks element as free */
361 free_list_elt (memif_list_elt_t * list, uint16_t len, int key)
364 for (i = 0; i < len; i++)
366 if (list[i].key == key)
369 list[i].data_struct = NULL;
378 free_list_elt_ctx (memif_list_elt_t * list, uint16_t len,
379 memif_connection_t * ctx)
382 for (i = 0; i < len; i++)
384 if (list[i].key == -1)
386 if (list[i].data_struct == ctx)
388 list[i].data_struct = NULL;
398 memif_control_fd_update_register (memif_control_fd_update_t * cb)
400 libmemif_main_t *lm = &libmemif_main;
401 lm->control_fd_update = cb;
405 memif_init (memif_control_fd_update_t * on_control_fd_update, char *app_name)
407 int err = MEMIF_ERR_SUCCESS; /* 0 */
408 libmemif_main_t *lm = &libmemif_main;
412 lm->app_name = malloc (strlen (app_name) + sizeof (char));
413 memset (lm->app_name, 0, strlen (app_name) + sizeof (char));
414 strncpy ((char *) lm->app_name, app_name, strlen (app_name));
418 lm->app_name = malloc (strlen (MEMIF_DEFAULT_APP_NAME) + sizeof (char));
419 memset (lm->app_name, 0, strlen (app_name) + sizeof (char));
420 strncpy ((char *) lm->app_name, MEMIF_DEFAULT_APP_NAME,
421 strlen (MEMIF_DEFAULT_APP_NAME));
424 /* register control fd update callback */
425 if (on_control_fd_update != NULL)
426 memif_control_fd_update_register (on_control_fd_update);
429 memif_epfd = epoll_create (1);
430 memif_control_fd_update_register (memif_control_fd_update);
431 if ((poll_cancel_fd = eventfd (0, EFD_NONBLOCK)) < 0)
434 DBG ("eventfd: %s", strerror (err));
435 return memif_syscall_error_handler (err);
437 lm->control_fd_update (poll_cancel_fd, MEMIF_FD_EVENT_READ);
438 DBG ("libmemif event polling initialized");
441 memset (&lm->ms, 0, sizeof (memif_socket_t));
443 lm->control_list_len = 2;
444 lm->interrupt_list_len = 2;
445 lm->listener_list_len = 1;
446 lm->pending_list_len = 1;
449 malloc (sizeof (memif_list_elt_t) * lm->control_list_len);
451 malloc (sizeof (memif_list_elt_t) * lm->interrupt_list_len);
453 malloc (sizeof (memif_list_elt_t) * lm->listener_list_len);
455 malloc (sizeof (memif_list_elt_t) * lm->pending_list_len);
458 for (i = 0; i < lm->control_list_len; i++)
460 lm->control_list[i].key = -1;
461 lm->control_list[i].data_struct = NULL;
463 for (i = 0; i < lm->interrupt_list_len; i++)
465 lm->interrupt_list[i].key = -1;
466 lm->interrupt_list[i].data_struct = NULL;
468 for (i = 0; i < lm->listener_list_len; i++)
470 lm->listener_list[i].key = -1;
471 lm->listener_list[i].data_struct = NULL;
473 for (i = 0; i < lm->pending_list_len; i++)
475 lm->pending_list[i].key = -1;
476 lm->pending_list[i].data_struct = NULL;
479 lm->disconn_slaves = 0;
481 lm->timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK);
485 DBG ("timerfd: %s", strerror (err));
486 return memif_syscall_error_handler (err);
489 lm->arm.it_value.tv_sec = 2;
490 lm->arm.it_value.tv_nsec = 0;
491 lm->arm.it_interval.tv_sec = 2;
492 lm->arm.it_interval.tv_nsec = 0;
493 memset (&lm->disarm, 0, sizeof (lm->disarm));
495 if (lm->control_fd_update (lm->timerfd, MEMIF_FD_EVENT_READ) < 0)
497 DBG ("callback type memif_control_fd_update_t error!");
498 return MEMIF_ERR_CB_FDUPDATE;
504 static inline memif_ring_t *
505 memif_get_ring (memif_connection_t * conn, memif_ring_type_t type,
508 if (&conn->regions[0] == NULL)
510 void *p = conn->regions[0].shm;
512 sizeof (memif_ring_t) +
513 sizeof (memif_desc_t) * (1 << conn->run_args.log2_ring_size);
514 p += (ring_num + type * conn->run_args.num_s2m_rings) * ring_size;
516 return (memif_ring_t *) p;
520 memif_set_rx_mode (memif_conn_handle_t c, memif_rx_mode_t rx_mode,
523 memif_connection_t *conn = (memif_connection_t *) c;
525 return MEMIF_ERR_NOCONN;
527 (conn->args.is_master) ? conn->run_args.num_s2m_rings : conn->run_args.
530 return MEMIF_ERR_QID;
532 conn->rx_queues[qid].ring->flags = rx_mode;
533 DBG ("rx_mode flag: %u", conn->rx_queues[qid].ring->flags);
534 return MEMIF_ERR_SUCCESS;
538 memif_create (memif_conn_handle_t * c, memif_conn_args_t * args,
539 memif_connection_update_t * on_connect,
540 memif_connection_update_t * on_disconnect,
541 memif_interrupt_t * on_interrupt, void *private_ctx)
543 int err, i, index, sockfd = -1;
544 memif_list_elt_t list_elt;
545 memif_connection_t *conn = (memif_connection_t *) * c;
548 DBG ("This handle already points to existing memif.");
549 return MEMIF_ERR_CONN;
551 conn = (memif_connection_t *) malloc (sizeof (memif_connection_t));
554 err = memif_syscall_error_handler (errno);
557 memset (conn, 0, sizeof (memif_connection_t));
559 libmemif_main_t *lm = &libmemif_main;
561 conn->args.interface_id = args->interface_id;
563 if (args->log2_ring_size == 0)
564 args->log2_ring_size = MEMIF_DEFAULT_LOG2_RING_SIZE;
565 else if (args->log2_ring_size > MEMIF_MAX_LOG2_RING_SIZE)
567 err = MEMIF_ERR_MAX_RING;
570 if (args->buffer_size == 0)
571 args->buffer_size = MEMIF_DEFAULT_BUFFER_SIZE;
572 if (args->num_s2m_rings == 0)
573 args->num_s2m_rings = MEMIF_DEFAULT_TX_QUEUES;
574 if (args->num_m2s_rings == 0)
575 args->num_m2s_rings = MEMIF_DEFAULT_RX_QUEUES;
577 conn->args.num_s2m_rings = args->num_s2m_rings;
578 conn->args.num_m2s_rings = args->num_m2s_rings;
579 conn->args.buffer_size = args->buffer_size;
580 conn->args.log2_ring_size = args->log2_ring_size;
581 conn->args.is_master = args->is_master;
582 conn->args.mode = args->mode;
583 conn->msg_queue = NULL;
584 conn->regions = NULL;
585 conn->tx_queues = NULL;
586 conn->rx_queues = NULL;
588 conn->on_connect = on_connect;
589 conn->on_disconnect = on_disconnect;
590 conn->on_interrupt = on_interrupt;
591 conn->private_ctx = private_ctx;
592 memset (&conn->run_args, 0, sizeof (memif_conn_run_args_t));
594 uint8_t l = strlen ((char *) args->interface_name);
595 strncpy ((char *) conn->args.interface_name, (char *) args->interface_name,
598 l = strlen ((char *) args->instance_name);
599 strncpy ((char *) conn->args.instance_name, (char *) args->instance_name,
602 /* allocate and initialize socket_filename so it can be copyed to sun_path
603 without memory leaks */
604 conn->args.socket_filename = malloc (sizeof (char *) * 108);
605 memset (conn->args.socket_filename, 0, 108 * sizeof (char *));
607 if (args->socket_filename)
609 if (conn->args.socket_filename == NULL)
611 err = memif_syscall_error_handler (errno);
614 strncpy ((char *) conn->args.socket_filename,
615 (char *) args->socket_filename,
616 strlen ((char *) args->socket_filename));
620 uint16_t sdl = strlen (MEMIF_DEFAULT_SOCKET_DIR);
621 uint16_t sfl = strlen (MEMIF_DEFAULT_SOCKET_FILENAME);
622 if (conn->args.socket_filename == NULL)
624 err = memif_syscall_error_handler (errno);
627 strncpy ((char *) conn->args.socket_filename,
628 MEMIF_DEFAULT_SOCKET_DIR, sdl);
629 conn->args.socket_filename[sdl] = '/';
630 strncpy ((char *) (conn->args.socket_filename + 1 + sdl),
631 MEMIF_DEFAULT_SOCKET_FILENAME, sfl);
636 l = strlen ((char *) args->secret);
637 strncpy ((char *) conn->args.secret, (char *) args->secret, l);
640 if (conn->args.is_master)
642 conn->run_args.buffer_size = conn->args.buffer_size;
644 memif_list_elt_t elt;
645 for (i = 0; i < lm->listener_list_len; i++)
648 (memif_socket_t *) lm->listener_list[i].data_struct) != NULL)
651 ((char *) ms->filename, (char *) conn->args.socket_filename,
652 strlen ((char *) ms->filename)) == 0)
654 /* add interface to listener socket */
655 elt.key = conn->args.interface_id;
656 *c = elt.data_struct = conn;
657 add_list_elt (&elt, &ms->interface_list,
658 &ms->interface_list_len);
660 conn->listener_fd = ms->fd;
666 struct stat file_stat;
667 if (stat ((char *) conn->args.socket_filename, &file_stat) == 0)
669 if (S_ISSOCK (file_stat.st_mode))
670 unlink ((char *) conn->args.socket_filename);
672 return memif_syscall_error_handler (errno);
674 DBG ("creating socket file");
675 ms = malloc (sizeof (memif_socket_t));
677 malloc (strlen ((char *) conn->args.socket_filename) +
679 memset (ms->filename, 0,
680 strlen ((char *) conn->args.socket_filename) +
682 strncpy ((char *) ms->filename,
683 (char *) conn->args.socket_filename,
684 strlen ((char *) conn->args.socket_filename));
685 ms->interface_list_len = 1;
687 malloc (sizeof (memif_list_elt_t) * ms->interface_list_len);
688 ms->interface_list[0].key = -1;
689 ms->interface_list[0].data_struct = NULL;
690 struct sockaddr_un un = { 0 };
693 ms->fd = socket (AF_UNIX, SOCK_SEQPACKET, 0);
696 err = memif_syscall_error_handler (errno);
699 DBG ("socket %d created", ms->fd);
700 un.sun_family = AF_UNIX;
701 strncpy ((char *) un.sun_path, (char *) ms->filename,
702 sizeof (un.sun_path) - 1);
705 (ms->fd, SOL_SOCKET, SO_PASSCRED, &on, sizeof (on)) < 0)
707 err = memif_syscall_error_handler (errno);
711 if (bind (ms->fd, (struct sockaddr *) &un, sizeof (un)) < 0)
713 err = memif_syscall_error_handler (errno);
717 if (listen (ms->fd, 1) < 0)
719 err = memif_syscall_error_handler (errno);
723 if (stat ((char *) ms->filename, &file_stat) < 0)
725 err = memif_syscall_error_handler (errno);
729 /* add interface to listener socket */
730 elt.key = conn->args.interface_id;
731 *c = elt.data_struct = conn;
732 add_list_elt (&elt, &ms->interface_list,
733 &ms->interface_list_len);
735 conn->listener_fd = ms->fd;
737 /* add listener socket to libmemif main */
739 elt.data_struct = ms;
740 add_list_elt (&elt, &lm->listener_list, &lm->listener_list_len);
741 lm->control_fd_update (ms->fd, MEMIF_FD_EVENT_READ);
748 if (lm->disconn_slaves == 0)
750 if (timerfd_settime (lm->timerfd, 0, &lm->arm, NULL) < 0)
752 err = memif_syscall_error_handler (errno);
757 lm->disconn_slaves++;
760 *c = list_elt.data_struct = conn;
762 add_list_elt (&list_elt, &lm->control_list,
763 &lm->control_list_len)) < 0)
765 err = MEMIF_ERR_NOMEM;
778 if (conn->args.socket_filename)
779 free (conn->args.socket_filename);
787 memif_control_fd_handler (int fd, uint8_t events)
789 int i, rv, sockfd = -1, err = MEMIF_ERR_SUCCESS; /* 0 */
791 memif_list_elt_t *e = NULL;
792 memif_connection_t *conn;
793 libmemif_main_t *lm = &libmemif_main;
794 if (fd == lm->timerfd)
798 size = read (fd, &b, sizeof (b));
799 for (i = 0; i < lm->control_list_len; i++)
801 if ((lm->control_list[i].key < 0)
802 && (lm->control_list[i].data_struct != NULL))
804 conn = lm->control_list[i].data_struct;
805 if (conn->args.is_master)
808 struct sockaddr_un sun;
809 sockfd = socket (AF_UNIX, SOCK_SEQPACKET, 0);
812 err = memif_syscall_error_handler (errno);
816 sun.sun_family = AF_UNIX;
818 strncpy (sun.sun_path, conn->args.socket_filename,
819 sizeof (sun.sun_path) - 1);
821 if (connect (sockfd, (struct sockaddr *) &sun,
822 sizeof (struct sockaddr_un)) == 0)
825 conn->read_fn = memif_conn_fd_read_ready;
826 conn->write_fn = memif_conn_fd_write_ready;
827 conn->error_fn = memif_conn_fd_error;
829 lm->control_list[conn->index].key = conn->fd;
831 lm->control_fd_update (sockfd,
832 MEMIF_FD_EVENT_READ |
833 MEMIF_FD_EVENT_WRITE);
835 lm->disconn_slaves--;
836 if (lm->disconn_slaves == 0)
838 if (timerfd_settime (lm->timerfd, 0, &lm->disarm, NULL)
841 err = memif_syscall_error_handler (errno);
848 err = memif_syscall_error_handler (errno);
856 get_list_elt (&e, lm->interrupt_list, lm->interrupt_list_len, fd);
859 if (((memif_connection_t *) e->data_struct)->on_interrupt != NULL)
862 (((memif_connection_t *) e->data_struct)->args.
863 is_master) ? ((memif_connection_t *) e->data_struct)->
864 run_args.num_s2m_rings : ((memif_connection_t *) e->
865 data_struct)->run_args.
867 for (i = 0; i < num; i++)
869 if (((memif_connection_t *) e->data_struct)->rx_queues[i].
872 ((memif_connection_t *) e->
873 data_struct)->on_interrupt ((void *) e->data_struct,
874 ((memif_connection_t *)
877 return MEMIF_ERR_SUCCESS;
881 return MEMIF_ERR_SUCCESS;
883 get_list_elt (&e, lm->listener_list, lm->listener_list_len, fd);
886 memif_conn_fd_accept_ready ((memif_socket_t *) e->data_struct);
887 return MEMIF_ERR_SUCCESS;
890 get_list_elt (&e, lm->pending_list, lm->pending_list_len, fd);
893 memif_read_ready (fd);
894 return MEMIF_ERR_SUCCESS;
897 get_list_elt (&e, lm->control_list, lm->control_list_len, fd);
900 if (events & MEMIF_FD_EVENT_READ)
903 ((memif_connection_t *) e->data_struct)->read_fn (e->
905 if (err != MEMIF_ERR_SUCCESS)
908 if (events & MEMIF_FD_EVENT_WRITE)
911 ((memif_connection_t *) e->data_struct)->write_fn (e->
913 if (err != MEMIF_ERR_SUCCESS)
916 if (events & MEMIF_FD_EVENT_ERROR)
919 ((memif_connection_t *) e->data_struct)->error_fn (e->
921 if (err != MEMIF_ERR_SUCCESS)
927 return MEMIF_ERR_SUCCESS; /* 0 */
937 memif_poll_event (int timeout)
939 libmemif_main_t *lm = &libmemif_main;
940 memif_list_elt_t *elt;
941 struct epoll_event evt, *e;
942 int en = 0, err = MEMIF_ERR_SUCCESS, i = 0; /* 0 */
945 uint64_t counter = 0;
947 memset (&evt, 0, sizeof (evt));
948 evt.events = EPOLLIN | EPOLLOUT;
950 sigemptyset (&sigset);
951 en = epoll_pwait (memif_epfd, &evt, 1, timeout, &sigset);
955 DBG ("epoll_pwait: %s", strerror (err));
956 return memif_syscall_error_handler (err);
960 if (evt.data.fd == poll_cancel_fd)
962 r = read (evt.data.fd, &counter, sizeof (counter));
963 return MEMIF_ERR_POLL_CANCEL;
965 if (evt.events & EPOLLIN)
966 events |= MEMIF_FD_EVENT_READ;
967 if (evt.events & EPOLLOUT)
968 events |= MEMIF_FD_EVENT_WRITE;
969 if (evt.events & EPOLLERR)
970 events |= MEMIF_FD_EVENT_ERROR;
971 err = memif_control_fd_handler (evt.data.fd, events);
978 memif_cancel_poll_event ()
980 uint64_t counter = 1;
983 if (poll_cancel_fd == -1)
985 w = write (poll_cancel_fd, &counter, sizeof (counter));
986 if (w < sizeof (counter))
987 return MEMIF_ERR_INT_WRITE;
993 memif_msg_queue_free (memif_msg_queue_elt_t ** e)
997 memif_msg_queue_free (&(*e)->next);
1003 /* send disconnect msg and close interface */
1005 memif_disconnect_internal (memif_connection_t * c)
1009 DBG ("no connection");
1010 return MEMIF_ERR_NOCONN;
1013 int err = MEMIF_ERR_SUCCESS, i; /* 0 */
1015 libmemif_main_t *lm = &libmemif_main;
1016 memif_list_elt_t *e;
1018 c->on_disconnect ((void *) c, c->private_ctx);
1022 memif_msg_send_disconnect (c->fd, "interface deleted", 0);
1023 lm->control_fd_update (c->fd, MEMIF_FD_EVENT_DEL);
1026 get_list_elt (&e, lm->control_list, lm->control_list_len, c->fd);
1029 if (c->args.is_master)
1030 free_list_elt (lm->control_list, lm->control_list_len, c->fd);
1031 e->key = c->fd = -1;
1034 if (c->tx_queues != NULL)
1037 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1039 for (i = 0; i < num; i++)
1041 mq = &c->tx_queues[i];
1046 free_list_elt (lm->interrupt_list, lm->interrupt_list_len,
1051 free (c->tx_queues);
1052 c->tx_queues = NULL;
1055 if (c->rx_queues != NULL)
1058 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1060 for (i = 0; i < num; i++)
1062 mq = &c->rx_queues[i];
1067 if (c->on_interrupt != NULL)
1068 lm->control_fd_update (mq->int_fd, MEMIF_FD_EVENT_DEL);
1071 free_list_elt (lm->interrupt_list, lm->interrupt_list_len,
1076 free (c->rx_queues);
1077 c->rx_queues = NULL;
1080 if (c->regions != NULL)
1082 if (munmap (c->regions[0].shm, c->regions[0].region_size) < 0)
1083 return memif_syscall_error_handler (errno);
1084 if (c->regions[0].fd > 0)
1085 close (c->regions[0].fd);
1086 c->regions[0].fd = -1;
1091 memset (&c->run_args, 0, sizeof (memif_conn_run_args_t));
1093 memif_msg_queue_free (&c->msg_queue);
1095 if (!(c->args.is_master))
1097 if (lm->disconn_slaves == 0)
1099 if (timerfd_settime (lm->timerfd, 0, &lm->arm, NULL) < 0)
1101 err = memif_syscall_error_handler (errno);
1102 DBG_UNIX ("timerfd_settime: arm");
1105 lm->disconn_slaves++;
1112 memif_delete (memif_conn_handle_t * conn)
1114 memif_connection_t *c = (memif_connection_t *) * conn;
1117 DBG ("no connection");
1118 return MEMIF_ERR_NOCONN;
1120 libmemif_main_t *lm = &libmemif_main;
1121 memif_list_elt_t *e = NULL;
1122 memif_socket_t *ms = NULL;
1124 int err = MEMIF_ERR_SUCCESS;
1128 DBG ("DISCONNECTING");
1129 err = memif_disconnect_internal (c);
1130 if (err == MEMIF_ERR_NOCONN)
1134 free_list_elt_ctx (lm->control_list, lm->control_list_len, c);
1136 if (c->args.is_master)
1138 get_list_elt (&e, lm->listener_list, lm->listener_list_len,
1142 ms = (memif_socket_t *) e->data_struct;
1144 free_list_elt (ms->interface_list, ms->interface_list_len,
1145 c->args.interface_id);
1146 if (ms->use_count <= 0)
1148 lm->control_fd_update (c->listener_fd, MEMIF_FD_EVENT_DEL);
1149 free_list_elt (lm->listener_list, lm->listener_list_len,
1151 close (c->listener_fd);
1152 c->listener_fd = ms->fd = -1;
1153 free (ms->interface_list);
1154 ms->interface_list = NULL;
1155 free (ms->filename);
1156 ms->filename = NULL;
1164 lm->disconn_slaves--;
1165 if (lm->disconn_slaves <= 0)
1167 if (timerfd_settime (lm->timerfd, 0, &lm->disarm, NULL) < 0)
1169 err = memif_syscall_error_handler (errno);
1170 DBG ("timerfd_settime: disarm");
1175 if (c->args.socket_filename)
1176 free (c->args.socket_filename);
1177 c->args.socket_filename = NULL;
1187 memif_connect1 (memif_connection_t * c)
1189 libmemif_main_t *lm = &libmemif_main;
1190 memif_region_t *mr = c->regions;
1200 return MEMIF_ERR_NO_SHMFD;
1202 if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
1203 MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
1205 return memif_syscall_error_handler (errno);
1211 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1213 for (i = 0; i < num; i++)
1215 mq = &c->tx_queues[i];
1218 mq->ring = c->regions[mq->region].shm + mq->offset;
1219 if (mq->ring->cookie != MEMIF_COOKIE)
1221 DBG ("wrong cookie on tx ring %u", i);
1222 return MEMIF_ERR_COOKIE;
1224 mq->ring->head = mq->ring->tail = mq->last_head = mq->alloc_bufs =
1229 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1231 for (i = 0; i < num; i++)
1233 mq = &c->rx_queues[i];
1236 mq->ring = c->regions[mq->region].shm + mq->offset;
1237 if (mq->ring->cookie != MEMIF_COOKIE)
1239 DBG ("wrong cookie on rx ring %u", i);
1240 return MEMIF_ERR_COOKIE;
1242 mq->ring->head = mq->ring->tail = mq->last_head = mq->alloc_bufs =
1247 lm->control_fd_update (c->fd, MEMIF_FD_EVENT_READ | MEMIF_FD_EVENT_MOD);
1253 memif_init_regions_and_queues (memif_connection_t * conn)
1255 memif_ring_t *ring = NULL;
1256 uint64_t buffer_offset;
1259 libmemif_main_t *lm = &libmemif_main;
1262 conn->regions = (memif_region_t *) malloc (sizeof (memif_region_t));
1263 if (conn->regions == NULL)
1264 return memif_syscall_error_handler (errno);
1268 (conn->run_args.num_s2m_rings +
1269 conn->run_args.num_m2s_rings) * (sizeof (memif_ring_t) +
1270 sizeof (memif_desc_t) *
1271 (1 << conn->run_args.log2_ring_size));
1273 r->region_size = buffer_offset +
1274 conn->run_args.buffer_size * (1 << conn->run_args.log2_ring_size) *
1275 (conn->run_args.num_s2m_rings + conn->run_args.num_m2s_rings);
1277 if ((r->fd = memfd_create ("memif region 0", MFD_ALLOW_SEALING)) == -1)
1278 return memif_syscall_error_handler (errno);
1280 if ((fcntl (r->fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
1281 return memif_syscall_error_handler (errno);
1283 if ((ftruncate (r->fd, r->region_size)) == -1)
1284 return memif_syscall_error_handler (errno);
1286 if ((r->shm = mmap (NULL, r->region_size, PROT_READ | PROT_WRITE,
1287 MAP_SHARED, r->fd, 0)) == MAP_FAILED)
1288 return memif_syscall_error_handler (errno);
1290 for (i = 0; i < conn->run_args.num_s2m_rings; i++)
1292 ring = memif_get_ring (conn, MEMIF_RING_S2M, i);
1293 DBG ("RING: %p I: %d", ring, i);
1294 ring->head = ring->tail = 0;
1295 ring->cookie = MEMIF_COOKIE;
1297 for (j = 0; j < (1 << conn->run_args.log2_ring_size); j++)
1299 uint16_t slot = i * (1 << conn->run_args.log2_ring_size) + j;
1300 ring->desc[j].region = 0;
1301 ring->desc[j].offset = buffer_offset +
1302 (uint32_t) (slot * conn->run_args.buffer_size);
1303 ring->desc[j].buffer_length = conn->run_args.buffer_size;
1306 for (i = 0; i < conn->run_args.num_m2s_rings; i++)
1308 ring = memif_get_ring (conn, MEMIF_RING_M2S, i);
1309 DBG ("RING: %p I: %d", ring, i);
1310 ring->head = ring->tail = 0;
1311 ring->cookie = MEMIF_COOKIE;
1313 for (j = 0; j < (1 << conn->run_args.log2_ring_size); j++)
1317 conn->run_args.num_s2m_rings) *
1318 (1 << conn->run_args.log2_ring_size) + j;
1319 ring->desc[j].region = 0;
1320 ring->desc[j].offset = buffer_offset +
1321 (uint32_t) (slot * conn->run_args.buffer_size);
1322 ring->desc[j].buffer_length = conn->run_args.buffer_size;
1327 (memif_queue_t *) malloc (sizeof (memif_queue_t) *
1328 conn->run_args.num_s2m_rings);
1330 return memif_syscall_error_handler (errno);
1332 for (x = 0; x < conn->run_args.num_s2m_rings; x++)
1334 if ((mq[x].int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
1335 return memif_syscall_error_handler (errno);
1336 /* add int fd to interrupt fd list */
1337 e.key = mq[x].int_fd;
1338 e.data_struct = conn;
1339 add_list_elt (&e, &lm->interrupt_list, &lm->interrupt_list_len);
1341 mq[x].ring = memif_get_ring (conn, MEMIF_RING_S2M, x);
1342 DBG ("RING: %p I: %d", mq[x].ring, x);
1343 mq[x].log2_ring_size = conn->run_args.log2_ring_size;
1346 (void *) mq[x].ring - (void *) conn->regions[mq->region].shm;
1347 mq[x].last_head = 0;
1348 mq[x].alloc_bufs = 0;
1350 conn->tx_queues = mq;
1353 (memif_queue_t *) malloc (sizeof (memif_queue_t) *
1354 conn->run_args.num_m2s_rings);
1356 return memif_syscall_error_handler (errno);
1357 for (x = 0; x < conn->run_args.num_m2s_rings; x++)
1359 if ((mq[x].int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
1360 return memif_syscall_error_handler (errno);
1361 /* add int fd to interrupt fd list */
1362 e.key = mq[x].int_fd;
1363 e.data_struct = conn;
1364 add_list_elt (&e, &lm->interrupt_list, &lm->interrupt_list_len);
1366 mq[x].ring = memif_get_ring (conn, MEMIF_RING_M2S, x);
1367 DBG ("RING: %p I: %d", mq[x].ring, x);
1368 mq[x].log2_ring_size = conn->run_args.log2_ring_size;
1371 (void *) mq[x].ring - (void *) conn->regions[mq->region].shm;
1372 mq[x].last_head = 0;
1373 mq[x].alloc_bufs = 0;
1375 conn->rx_queues = mq;
1381 memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid,
1382 memif_buffer_t * bufs, uint16_t count,
1383 uint16_t * count_out, uint16_t size)
1385 memif_connection_t *c = (memif_connection_t *) conn;
1387 return MEMIF_ERR_NOCONN;
1389 return MEMIF_ERR_DISCONNECTED;
1391 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1394 return MEMIF_ERR_QID;
1395 memif_queue_t *mq = &c->tx_queues[qid];
1396 memif_ring_t *ring = mq->ring;
1397 memif_buffer_t *b0, *b1;
1398 uint8_t chain_buf = 1;
1399 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1400 uint16_t head = ring->head;
1401 uint16_t tail = ring->tail;
1402 uint16_t s0, s1, ns;
1404 int i, err = MEMIF_ERR_SUCCESS; /* 0 */
1406 ns = (1 << mq->log2_ring_size) - head + tail;
1408 /* calculate number of chain buffers */
1409 if (size > ring->desc[0].buffer_length)
1411 chain_buf = size / ring->desc[s0].buffer_length;
1412 if (((size % ring->desc[s0].buffer_length) != 0) || (size == 0))
1418 while ((count > 2) && (ns > 2))
1420 s0 = (ring->head + mq->alloc_bufs) & mask;
1421 s1 = (ring->head + mq->alloc_bufs + chain_buf) & mask;
1423 if ((2 * chain_buf) > ns)
1426 b0 = (bufs + *count_out);
1427 b1 = (bufs + *count_out + 1);
1429 b0->desc_index = head + mq->alloc_bufs;
1430 b1->desc_index = head + mq->alloc_bufs + chain_buf;
1431 ring->desc[s0].flags = 0;
1432 ring->desc[s1].flags = 0;
1433 b0->buffer_len = ring->desc[s0].buffer_length * chain_buf;
1434 b1->buffer_len = ring->desc[s1].buffer_length * chain_buf;
1435 /* TODO: support multiple regions -> ring descriptor contains region index */
1436 b0->data = c->regions->shm + ring->desc[s0].offset;
1437 b1->data = c->regions->shm + ring->desc[s1].offset;
1439 for (i = 0; i < (chain_buf - 1); i++)
1441 ring->desc[(s0 + i) & mask].flags |= MEMIF_DESC_FLAG_NEXT;
1442 ring->desc[(s1 + i) & mask].flags |= MEMIF_DESC_FLAG_NEXT;
1443 DBG ("allocating chained buffers");
1446 mq->alloc_bufs += 2 * chain_buf;
1448 DBG ("allocated ring slots %u, %u", s0, s1);
1450 ns -= (2 * chain_buf);
1453 s0 = (ring->head + mq->alloc_bufs) & mask;
1455 b0 = (bufs + *count_out);
1460 b0->desc_index = head + mq->alloc_bufs;
1461 ring->desc[s0].flags = 0;
1462 b0->buffer_len = ring->desc[s0].buffer_length * chain_buf;
1463 b0->data = c->regions->shm + ring->desc[s0].offset;
1465 for (i = 0; i < (chain_buf - 1); i++)
1467 ring->desc[(s0 + i) & mask].flags |= MEMIF_DESC_FLAG_NEXT;
1468 DBG ("allocating chained buffers");
1471 mq->alloc_bufs += chain_buf;
1473 DBG ("allocated ring slot %u", s0);
1479 DBG ("allocated: %u/%u bufs. Total %u allocated bufs", *count_out, count,
1484 DBG ("ring buffer full! qid: %u", qid);
1485 err = MEMIF_ERR_NOBUF_RING;
1492 memif_buffer_free (memif_conn_handle_t conn, uint16_t qid,
1493 memif_buffer_t * bufs, uint16_t count,
1494 uint16_t * count_out)
1496 memif_connection_t *c = (memif_connection_t *) conn;
1498 return MEMIF_ERR_NOCONN;
1500 return MEMIF_ERR_DISCONNECTED;
1502 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1505 return MEMIF_ERR_QID;
1506 libmemif_main_t *lm = &libmemif_main;
1507 memif_queue_t *mq = &c->rx_queues[qid];
1508 memif_ring_t *ring = mq->ring;
1509 uint16_t tail = ring->tail;
1510 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1511 uint8_t chain_buf0, chain_buf1;
1512 memif_buffer_t *b0, *b1;
1515 if (mq->alloc_bufs < count)
1516 count = mq->alloc_bufs;
1522 b0 = (bufs + *count_out);
1523 b1 = (bufs + *count_out + 1);
1525 b0->buffer_len / ring->desc[b0->desc_index].buffer_length;
1526 if ((b0->buffer_len % ring->desc[b0->desc_index].buffer_length) !=
1530 b1->buffer_len / ring->desc[b1->desc_index].buffer_length;
1531 if ((b1->buffer_len % ring->desc[b1->desc_index].buffer_length) !=
1534 tail = b1->desc_index + chain_buf1;
1540 mq->alloc_bufs -= chain_buf0 + chain_buf1;
1542 b0 = (bufs + *count_out);
1543 chain_buf0 = b0->buffer_len / ring->desc[b0->desc_index].buffer_length;
1544 if ((b0->buffer_len % ring->desc[b0->desc_index].buffer_length) != 0)
1546 tail = b0->desc_index + chain_buf0;
1551 mq->alloc_bufs -= chain_buf0;
1553 MEMIF_MEMORY_BARRIER ();
1555 DBG ("tail: %u", ring->tail);
1557 return MEMIF_ERR_SUCCESS; /* 0 */
1561 memif_tx_burst (memif_conn_handle_t conn, uint16_t qid,
1562 memif_buffer_t * bufs, uint16_t count, uint16_t * tx)
1564 memif_connection_t *c = (memif_connection_t *) conn;
1566 return MEMIF_ERR_NOCONN;
1568 return MEMIF_ERR_DISCONNECTED;
1570 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1573 return MEMIF_ERR_QID;
1574 memif_queue_t *mq = &c->tx_queues[qid];
1575 memif_ring_t *ring = mq->ring;
1576 uint16_t head = ring->head;
1577 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1578 uint8_t chain_buf0, chain_buf1;
1580 uint16_t curr_buf = 0;
1581 memif_buffer_t *b0, *b1;
1588 b0 = (bufs + curr_buf);
1589 b1 = (bufs + curr_buf + 1);
1591 b0->buffer_len / ring->desc[b0->desc_index].buffer_length;
1592 if ((b0->buffer_len % ring->desc[b0->desc_index].buffer_length) !=
1597 b1->buffer_len / ring->desc[b1->desc_index].buffer_length;
1598 if ((b1->buffer_len % ring->desc[b1->desc_index].buffer_length) !=
1602 for (i = 0; i < memif_min (chain_buf0, chain_buf1); i++)
1606 ring->desc[(b0->desc_index + i) & mask].buffer_length)
1609 ring->desc[(b0->desc_index + i) & mask].length =
1610 ring->desc[(b0->desc_index + i) & mask].buffer_length;
1614 ring->desc[(b0->desc_index + i) & mask].length =
1620 ring->desc[(b1->desc_index + i) & mask].buffer_length)
1623 ring->desc[(b1->desc_index + i) & mask].length =
1624 ring->desc[(b1->desc_index + i) & mask].buffer_length;
1628 ring->desc[(b1->desc_index + i) & mask].length =
1632 #ifdef MEMIF_DBG_SHM
1633 print_bytes (b0->data +
1634 ring->desc[(b0->desc_index +
1635 i) & mask].buffer_length *
1637 ring->desc[(b0->desc_index +
1638 i) & mask].buffer_length, DBG_TX_BUF);
1639 print_bytes (b1->data +
1640 ring->desc[(b1->desc_index +
1641 i) & mask].buffer_length *
1643 ring->desc[(b1->desc_index +
1644 i) & mask].buffer_length, DBG_TX_BUF);
1645 #endif /* MEMIF_DBG_SHM */
1648 if (chain_buf0 > chain_buf1)
1650 for (; i < chain_buf0; i++)
1653 ring->desc[(b0->desc_index + i) & mask].buffer_length)
1656 ring->desc[(b0->desc_index + i) & mask].length =
1657 ring->desc[(b0->desc_index + i) & mask].buffer_length;
1661 ring->desc[(b0->desc_index + i) & mask].length =
1665 #ifdef MEMIF_DBG_SHM
1666 print_bytes (b0->data +
1667 ring->desc[(b0->desc_index +
1668 i) & mask].buffer_length *
1670 ring->desc[(b0->desc_index +
1671 i) & mask].buffer_length,
1673 #endif /* MEMIF_DBG_SHM */
1678 for (; i < chain_buf1; i++)
1681 ring->desc[(b1->desc_index + i) & mask].buffer_length)
1684 ring->desc[(b1->desc_index + i) & mask].length =
1685 ring->desc[(b1->desc_index + i) & mask].buffer_length;
1689 ring->desc[(b1->desc_index + i) & mask].length =
1693 #ifdef MEMIF_DBG_SHM
1694 print_bytes (b1->data +
1695 ring->desc[(b1->desc_index +
1696 i) & mask].buffer_length *
1698 ring->desc[(b1->desc_index +
1699 i) & mask].buffer_length,
1701 #endif /* MEMIF_DBG_SHM */
1705 head = (b1->desc_index + chain_buf1) & mask;
1709 if (b0->data_len != 0)
1710 DBG ("invalid b0 data length!");
1711 #endif /* MEMIF_DBG */
1714 if (b1->data_len != 0)
1715 DBG ("invalid b1 data length!");
1716 #endif /* MEMIF_DBG */
1719 *tx += chain_buf0 + chain_buf1;
1723 b0 = (bufs + curr_buf);
1724 chain_buf0 = b0->buffer_len / ring->desc[b0->desc_index].buffer_length;
1725 if ((b0->buffer_len % ring->desc[b0->desc_index].buffer_length) != 0)
1728 for (i = 0; i < chain_buf0; i++)
1731 ring->desc[(b0->desc_index + i) & mask].buffer_length)
1733 b0->data_len -= ring->desc[(b0->desc_index + i) & mask].length =
1734 ring->desc[(b0->desc_index + i) & mask].buffer_length;
1738 ring->desc[(b0->desc_index + i) & mask].length = b0->data_len;
1741 #ifdef MEMIF_DBG_SHM
1742 print_bytes (b0->data +
1743 ring->desc[(b0->desc_index + i) & mask].buffer_length *
1745 ring->desc[(b0->desc_index + i) & mask].buffer_length,
1747 #endif /* MEMIF_DBG_SHM */
1750 head = (b0->desc_index + chain_buf0) & mask;
1754 if (b0->data_len != 0)
1755 DBG ("invalid b0 data length!");
1756 #endif /* MEMIF_DBG */
1762 MEMIF_MEMORY_BARRIER ();
1765 mq->alloc_bufs -= *tx;
1767 /* TODO: return num of buffers and packets */
1770 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0)
1773 int r = write (mq->int_fd, &a, sizeof (a));
1775 return MEMIF_ERR_INT_WRITE;
1778 return MEMIF_ERR_SUCCESS; /* 0 */
1782 memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
1783 memif_buffer_t * bufs, uint16_t count, uint16_t * rx)
1785 memif_connection_t *c = (memif_connection_t *) conn;
1787 return MEMIF_ERR_NOCONN;
1789 return MEMIF_ERR_DISCONNECTED;
1791 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1794 return MEMIF_ERR_QID;
1795 memif_queue_t *mq = &c->rx_queues[qid];
1796 memif_ring_t *ring = mq->ring;
1797 uint16_t head = ring->head;
1799 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1800 memif_buffer_t *b0, *b1;
1801 uint16_t curr_buf = 0;
1803 #ifdef MEMIF_DBG_SHM
1805 #endif /* MEMIF_DBG_SHM */
1808 ssize_t r = read (mq->int_fd, &b, sizeof (b));
1809 if ((r == -1) && (errno != EAGAIN))
1810 return memif_syscall_error_handler (errno);
1812 if (head == mq->last_head)
1815 ns = head - mq->last_head;
1819 while ((ns > 2) && (count > 2))
1821 b0 = (bufs + curr_buf);
1822 b1 = (bufs + curr_buf + 1);
1824 b0->desc_index = mq->last_head;
1825 b0->data = memif_get_buffer (conn, ring, mq->last_head & mask);
1826 b0->data_len = ring->desc[mq->last_head & mask].length;
1827 b0->buffer_len = ring->desc[mq->last_head & mask].buffer_length;
1828 #ifdef MEMIF_DBG_SHM
1830 print_bytes (b0->data +
1831 ring->desc[b0->desc_index & mask].buffer_length * i++,
1832 ring->desc[b0->desc_index & mask].buffer_length, DBG_TX_BUF);
1833 #endif /* MEMIF_DBG_SHM */
1836 while (ring->desc[mq->last_head & mask].flags & MEMIF_DESC_FLAG_NEXT)
1838 ring->desc[mq->last_head & mask].flags &= ~MEMIF_DESC_FLAG_NEXT;
1840 b0->data_len += ring->desc[mq->last_head & mask].length;
1841 b0->buffer_len += ring->desc[mq->last_head & mask].buffer_length;
1842 #ifdef MEMIF_DBG_SHM
1843 print_bytes (b0->data +
1844 ring->desc[b0->desc_index & mask].buffer_length * i++,
1845 ring->desc[b0->desc_index & mask].buffer_length,
1847 #endif /* MEMIF_DBG_SHM */
1853 b1->desc_index = mq->last_head;
1854 b1->data = memif_get_buffer (conn, ring, mq->last_head & mask);
1855 b1->data_len = ring->desc[mq->last_head & mask].length;
1856 b1->buffer_len = ring->desc[mq->last_head & mask].buffer_length;
1857 #ifdef MEMIF_DBG_SHM
1859 print_bytes (b1->data +
1860 ring->desc[b1->desc_index & mask].buffer_length * i++,
1861 ring->desc[b1->desc_index & mask].buffer_length, DBG_TX_BUF);
1862 #endif /* MEMIF_DBG_SHM */
1865 while (ring->desc[mq->last_head & mask].flags & MEMIF_DESC_FLAG_NEXT)
1867 ring->desc[mq->last_head & mask].flags &= ~MEMIF_DESC_FLAG_NEXT;
1869 b1->data_len += ring->desc[mq->last_head & mask].length;
1870 b1->buffer_len += ring->desc[mq->last_head & mask].buffer_length;
1871 #ifdef MEMIF_DBG_SHM
1872 print_bytes (b1->data +
1873 ring->desc[b1->desc_index & mask].buffer_length * i++,
1874 ring->desc[b1->desc_index & mask].buffer_length,
1876 #endif /* MEMIF_DBG_SHM */
1885 b0 = (bufs + curr_buf);
1887 b0->desc_index = mq->last_head;
1888 b0->data = memif_get_buffer (conn, ring, mq->last_head & mask);
1889 b0->data_len = ring->desc[mq->last_head & mask].length;
1890 b0->buffer_len = ring->desc[mq->last_head & mask].buffer_length;
1891 #ifdef MEMIF_DBG_SHM
1893 print_bytes (b0->data +
1894 ring->desc[b0->desc_index & mask].buffer_length * i++,
1895 ring->desc[b0->desc_index & mask].buffer_length, DBG_TX_BUF);
1896 #endif /* MEMIF_DBG_SHM */
1900 while (ring->desc[mq->last_head & mask].flags & MEMIF_DESC_FLAG_NEXT)
1902 ring->desc[mq->last_head & mask].flags &= ~MEMIF_DESC_FLAG_NEXT;
1904 b0->data_len += ring->desc[mq->last_head & mask].length;
1905 b0->buffer_len += ring->desc[mq->last_head & mask].buffer_length;
1906 #ifdef MEMIF_DBG_SHM
1907 print_bytes (b0->data +
1908 ring->desc[b0->desc_index & mask].buffer_length * i++,
1909 ring->desc[b0->desc_index & mask].buffer_length, DBG_TX_BUF);
1910 #endif /* MEMIF_DBG_SHM */
1920 mq->alloc_bufs += *rx;
1922 /* TODO: return num of buffers and packets */
1927 DBG ("not enough buffers!");
1928 return MEMIF_ERR_NOBUF;
1931 return MEMIF_ERR_SUCCESS; /* 0 */
1935 memif_get_details (memif_conn_handle_t conn, memif_details_t * md,
1936 char *buf, ssize_t buflen)
1938 memif_connection_t *c = (memif_connection_t *) conn;
1940 return MEMIF_ERR_NOCONN;
1942 int err = MEMIF_ERR_SUCCESS, i;
1943 ssize_t l0, l1, total_l;
1946 l1 = strlen ((char *) c->args.interface_name);
1947 if (l0 + l1 < buflen)
1949 md->if_name = strcpy (buf + l0, (char *) c->args.interface_name);
1953 err = MEMIF_ERR_NOBUF_DET;
1955 l1 = strlen ((char *) c->args.instance_name);
1956 if (l0 + l1 < buflen)
1958 md->inst_name = strcpy (buf + l0, (char *) c->args.instance_name);
1962 err = MEMIF_ERR_NOBUF_DET;
1964 l1 = strlen ((char *) c->remote_if_name);
1965 if (l0 + l1 < buflen)
1967 md->remote_if_name = strcpy (buf + l0, (char *) c->remote_if_name);
1971 err = MEMIF_ERR_NOBUF_DET;
1973 l1 = strlen ((char *) c->remote_name);
1974 if (l0 + l1 < buflen)
1976 md->remote_inst_name = strcpy (buf + l0, (char *) c->remote_name);
1980 err = MEMIF_ERR_NOBUF_DET;
1982 md->id = c->args.interface_id;
1986 l1 = strlen ((char *) c->args.secret);
1987 if (l0 + l1 < buflen)
1989 md->secret = strcpy (buf + l0, (char *) c->args.secret);
1993 err = MEMIF_ERR_NOBUF_DET;
1996 md->role = (c->args.is_master) ? 0 : 1;
1997 md->mode = c->args.mode;
1999 l1 = strlen ((char *) c->args.socket_filename);
2000 if (l0 + l1 < buflen)
2002 md->socket_filename =
2003 strcpy (buf + l0, (char *) c->args.socket_filename);
2007 err = MEMIF_ERR_NOBUF_DET;
2010 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
2013 l1 = sizeof (memif_queue_details_t) * md->rx_queues_num;
2014 if (l0 + l1 <= buflen)
2016 md->rx_queues = (memif_queue_details_t *) buf + l0;
2020 err = MEMIF_ERR_NOBUF_DET;
2022 for (i = 0; i < md->rx_queues_num; i++)
2024 md->rx_queues[i].qid = i;
2025 md->rx_queues[i].ring_size = (1 << c->rx_queues[i].log2_ring_size);
2026 md->rx_queues[i].buffer_size = c->run_args.buffer_size;
2030 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
2033 l1 = sizeof (memif_queue_details_t) * md->tx_queues_num;
2034 if (l0 + l1 <= buflen)
2036 md->tx_queues = (memif_queue_details_t *) buf + l0;
2040 err = MEMIF_ERR_NOBUF_DET;
2042 for (i = 0; i < md->tx_queues_num; i++)
2044 md->tx_queues[i].qid = i;
2045 md->tx_queues[i].ring_size = (1 << c->tx_queues[i].log2_ring_size);
2046 md->tx_queues[i].buffer_size = c->run_args.buffer_size;
2049 md->link_up_down = (c->fd > 0) ? 1 : 0;
2055 memif_get_queue_efd (memif_conn_handle_t conn, uint16_t qid, int *efd)
2057 memif_connection_t *c = (memif_connection_t *) conn;
2060 return MEMIF_ERR_NOCONN;
2062 return MEMIF_ERR_DISCONNECTED;
2064 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
2067 return MEMIF_ERR_QID;
2069 *efd = c->rx_queues[qid].int_fd;
2071 return MEMIF_ERR_SUCCESS;
2077 libmemif_main_t *lm = &libmemif_main;
2079 free (lm->app_name);
2080 lm->app_name = NULL;
2081 if (lm->control_list)
2082 free (lm->control_list);
2083 lm->control_list = NULL;
2084 if (lm->interrupt_list)
2085 free (lm->interrupt_list);
2086 lm->interrupt_list = NULL;
2087 if (lm->listener_list)
2088 free (lm->listener_list);
2089 lm->listener_list = NULL;
2090 if (lm->pending_list)
2091 free (lm->pending_list);
2092 lm->pending_list = NULL;
2093 if (poll_cancel_fd != -1)
2094 close (poll_cancel_fd);
2096 return MEMIF_ERR_SUCCESS; /* 0 */