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 37
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."
148 #define MEMIF_ERR_UNDEFINED "undefined error"
151 memif_strerror (int err_code)
153 if (err_code >= ERRLIST_LEN)
155 strncpy (memif_buf, MEMIF_ERR_UNDEFINED, strlen (MEMIF_ERR_UNDEFINED));
156 memif_buf[strlen (MEMIF_ERR_UNDEFINED)] = '\0';
160 strncpy (memif_buf, memif_errlist[err_code],
161 strlen (memif_errlist[err_code]));
162 memif_buf[strlen (memif_errlist[err_code])] = '\0';
167 #define DBG_TX_BUF (0)
168 #define DBG_RX_BUF (1)
172 print_bytes (void *data, uint16_t len, uint8_t q)
175 printf ("\nTX:\n\t");
177 printf ("\nRX:\n\t");
179 for (i = 0; i < len; i++)
182 printf ("\n%d:\t", i);
183 printf ("%02X ", ((uint8_t *) (data))[i]);
187 #endif /* MEMIF_DBG_SHM */
190 memif_syscall_error_handler (int err_code)
192 DBG_UNIX ("%s", strerror (err_code));
195 return MEMIF_ERR_SUCCESS;
196 if (err_code == EACCES)
197 return MEMIF_ERR_ACCES;
198 if (err_code == ENFILE)
199 return MEMIF_ERR_FILE_LIMIT;
200 if (err_code == EMFILE)
201 return MEMIF_ERR_PROC_FILE_LIMIT;
202 if (err_code == ENOMEM)
203 return MEMIF_ERR_NOMEM;
204 /* connection refused if master dows not exist
205 this error would spam the user until master was created */
206 if (err_code == ECONNREFUSED)
207 return MEMIF_ERR_SUCCESS;
208 if (err_code == EALREADY)
209 return MEMIF_ERR_ALREADY;
210 if (err_code == EAGAIN)
211 return MEMIF_ERR_AGAIN;
212 if (err_code == EBADF)
213 return MEMIF_ERR_BAD_FD;
214 if (err_code == ENOENT)
215 return MEMIF_ERR_NO_FILE;
217 /* other syscall errors */
218 return MEMIF_ERR_SYSCALL;
222 memif_add_epoll_fd (int fd, uint32_t events)
226 DBG ("invalid fd %d", fd);
229 struct epoll_event evt;
230 memset (&evt, 0, sizeof (evt));
233 if (epoll_ctl (memif_epfd, EPOLL_CTL_ADD, fd, &evt) < 0)
235 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
238 DBG ("fd %d added to epoll", fd);
243 memif_mod_epoll_fd (int fd, uint32_t events)
247 DBG ("invalid fd %d", fd);
250 struct epoll_event evt;
251 memset (&evt, 0, sizeof (evt));
254 if (epoll_ctl (memif_epfd, EPOLL_CTL_MOD, fd, &evt) < 0)
256 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
259 DBG ("fd %d moddified on epoll", fd);
264 memif_del_epoll_fd (int fd)
268 DBG ("invalid fd %d", fd);
271 struct epoll_event evt;
272 memset (&evt, 0, sizeof (evt));
273 if (epoll_ctl (memif_epfd, EPOLL_CTL_DEL, fd, &evt) < 0)
275 DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
278 DBG ("fd %d removed from epoll", fd);
283 memif_control_fd_update (int fd, uint8_t events)
285 if (events & MEMIF_FD_EVENT_DEL)
286 return memif_del_epoll_fd (fd);
289 if (events & MEMIF_FD_EVENT_READ)
291 if (events & MEMIF_FD_EVENT_WRITE)
294 if (events & MEMIF_FD_EVENT_MOD)
295 return memif_mod_epoll_fd (fd, evt);
297 return memif_add_epoll_fd (fd, evt);
301 add_list_elt (memif_list_elt_t * e, memif_list_elt_t ** list, uint16_t * len)
303 libmemif_main_t *lm = &libmemif_main;
306 for (i = 0; i < *len; i++)
308 if ((*list)[i].data_struct == NULL)
310 (*list)[i].key = e->key;
311 (*list)[i].data_struct = e->data_struct;
315 memif_list_elt_t *tmp;
316 tmp = realloc (*list, sizeof (memif_list_elt_t) * *len * 2);
320 for (i = *len; i < *len * 2; i++)
323 tmp[i].data_struct = NULL;
326 tmp[*len].key = e->key;
327 tmp[*len].data_struct = e->data_struct;
336 get_list_elt (memif_list_elt_t ** e, memif_list_elt_t * list, uint16_t len,
345 for (i = 0; i < len; i++)
347 if (list[i].key == key)
357 /* does not free memory, only marks element as free */
359 free_list_elt (memif_list_elt_t * list, uint16_t len, int key)
362 for (i = 0; i < len; i++)
364 if (list[i].key == key)
367 list[i].data_struct = NULL;
376 free_list_elt_ctx (memif_list_elt_t * list, uint16_t len,
377 memif_connection_t * ctx)
380 for (i = 0; i < len; i++)
382 if (list[i].key == -1)
384 if (list[i].data_struct == ctx)
386 list[i].data_struct = NULL;
396 memif_control_fd_update_register (memif_control_fd_update_t * cb)
398 libmemif_main_t *lm = &libmemif_main;
399 lm->control_fd_update = cb;
403 memif_init (memif_control_fd_update_t * on_control_fd_update, char *app_name)
405 int err = MEMIF_ERR_SUCCESS; /* 0 */
406 libmemif_main_t *lm = &libmemif_main;
410 lm->app_name = malloc (strlen (app_name) + sizeof (char));
411 memset (lm->app_name, 0, strlen (app_name) + sizeof (char));
412 strncpy ((char *) lm->app_name, app_name, strlen (app_name));
416 lm->app_name = malloc (strlen (MEMIF_DEFAULT_APP_NAME) + sizeof (char));
417 memset (lm->app_name, 0, strlen (app_name) + sizeof (char));
418 strncpy ((char *) lm->app_name, MEMIF_DEFAULT_APP_NAME,
419 strlen (MEMIF_DEFAULT_APP_NAME));
422 /* register control fd update callback */
423 if (on_control_fd_update != NULL)
424 memif_control_fd_update_register (on_control_fd_update);
427 memif_epfd = epoll_create (1);
428 memif_control_fd_update_register (memif_control_fd_update);
429 if ((poll_cancel_fd = eventfd (0, EFD_NONBLOCK)) < 0)
432 DBG ("eventfd: %s", strerror (err));
433 return memif_syscall_error_handler (err);
435 lm->control_fd_update (poll_cancel_fd, MEMIF_FD_EVENT_READ);
436 DBG ("libmemif event polling initialized");
439 memset (&lm->ms, 0, sizeof (memif_socket_t));
441 lm->control_list_len = 2;
442 lm->interrupt_list_len = 2;
443 lm->listener_list_len = 1;
444 lm->pending_list_len = 1;
447 malloc (sizeof (memif_list_elt_t) * lm->control_list_len);
449 malloc (sizeof (memif_list_elt_t) * lm->interrupt_list_len);
451 malloc (sizeof (memif_list_elt_t) * lm->listener_list_len);
453 malloc (sizeof (memif_list_elt_t) * lm->pending_list_len);
456 for (i = 0; i < lm->control_list_len; i++)
458 lm->control_list[i].key = -1;
459 lm->control_list[i].data_struct = NULL;
461 for (i = 0; i < lm->interrupt_list_len; i++)
463 lm->interrupt_list[i].key = -1;
464 lm->interrupt_list[i].data_struct = NULL;
466 for (i = 0; i < lm->listener_list_len; i++)
468 lm->listener_list[i].key = -1;
469 lm->listener_list[i].data_struct = NULL;
471 for (i = 0; i < lm->pending_list_len; i++)
473 lm->pending_list[i].key = -1;
474 lm->pending_list[i].data_struct = NULL;
477 lm->disconn_slaves = 0;
479 lm->timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK);
483 DBG ("timerfd: %s", strerror (err));
484 return memif_syscall_error_handler (err);
487 lm->arm.it_value.tv_sec = 2;
488 lm->arm.it_value.tv_nsec = 0;
489 lm->arm.it_interval.tv_sec = 2;
490 lm->arm.it_interval.tv_nsec = 0;
491 memset (&lm->disarm, 0, sizeof (lm->disarm));
493 if (lm->control_fd_update (lm->timerfd, MEMIF_FD_EVENT_READ) < 0)
495 DBG ("callback type memif_control_fd_update_t error!");
496 return MEMIF_ERR_CB_FDUPDATE;
502 static inline memif_ring_t *
503 memif_get_ring (memif_connection_t * conn, memif_ring_type_t type,
506 if (&conn->regions[0] == NULL)
508 void *p = conn->regions[0].shm;
510 sizeof (memif_ring_t) +
511 sizeof (memif_desc_t) * (1 << conn->run_args.log2_ring_size);
512 p += (ring_num + type * conn->run_args.num_s2m_rings) * ring_size;
514 return (memif_ring_t *) p;
518 memif_set_rx_mode (memif_conn_handle_t c, memif_rx_mode_t rx_mode,
521 memif_connection_t *conn = (memif_connection_t *) c;
523 return MEMIF_ERR_NOCONN;
525 (conn->args.is_master) ? conn->run_args.num_s2m_rings : conn->run_args.
528 return MEMIF_ERR_QID;
530 conn->rx_queues[qid].ring->flags = rx_mode;
531 DBG ("rx_mode flag: %u", conn->rx_queues[qid].ring->flags);
532 return MEMIF_ERR_SUCCESS;
536 memif_create (memif_conn_handle_t * c, memif_conn_args_t * args,
537 memif_connection_update_t * on_connect,
538 memif_connection_update_t * on_disconnect,
539 memif_interrupt_t * on_interrupt, void *private_ctx)
541 int err, i, index, sockfd = -1;
542 memif_list_elt_t list_elt;
543 memif_connection_t *conn = (memif_connection_t *) * c;
546 DBG ("This handle already points to existing memif.");
547 return MEMIF_ERR_CONN;
549 conn = (memif_connection_t *) malloc (sizeof (memif_connection_t));
552 err = memif_syscall_error_handler (errno);
555 memset (conn, 0, sizeof (memif_connection_t));
557 libmemif_main_t *lm = &libmemif_main;
559 conn->args.interface_id = args->interface_id;
561 if (args->log2_ring_size == 0)
562 args->log2_ring_size = MEMIF_DEFAULT_LOG2_RING_SIZE;
563 if (args->buffer_size == 0)
564 args->buffer_size = MEMIF_DEFAULT_BUFFER_SIZE;
565 if (args->num_s2m_rings == 0)
566 args->num_s2m_rings = MEMIF_DEFAULT_TX_QUEUES;
567 if (args->num_m2s_rings == 0)
568 args->num_m2s_rings = MEMIF_DEFAULT_RX_QUEUES;
570 conn->args.num_s2m_rings = args->num_s2m_rings;
571 conn->args.num_m2s_rings = args->num_m2s_rings;
572 conn->args.buffer_size = args->buffer_size;
573 conn->args.log2_ring_size = args->log2_ring_size;
574 conn->args.is_master = args->is_master;
575 conn->args.mode = args->mode;
576 conn->msg_queue = NULL;
577 conn->regions = NULL;
578 conn->tx_queues = NULL;
579 conn->rx_queues = NULL;
581 conn->on_connect = on_connect;
582 conn->on_disconnect = on_disconnect;
583 conn->on_interrupt = on_interrupt;
584 conn->private_ctx = private_ctx;
585 memset (&conn->run_args, 0, sizeof (memif_conn_run_args_t));
587 uint8_t l = strlen ((char *) args->interface_name);
588 strncpy ((char *) conn->args.interface_name, (char *) args->interface_name,
591 l = strlen ((char *) args->instance_name);
592 strncpy ((char *) conn->args.instance_name, (char *) args->instance_name,
595 /* allocate and initialize socket_filename so it can be copyed to sun_path
596 without memory leaks */
597 conn->args.socket_filename = malloc (sizeof (char *) * 108);
598 memset (conn->args.socket_filename, 0, 108 * sizeof (char *));
600 if (args->socket_filename)
602 if (conn->args.socket_filename == NULL)
604 err = memif_syscall_error_handler (errno);
607 strncpy ((char *) conn->args.socket_filename,
608 (char *) args->socket_filename,
609 strlen ((char *) args->socket_filename));
613 uint16_t sdl = strlen (MEMIF_DEFAULT_SOCKET_DIR);
614 uint16_t sfl = strlen (MEMIF_DEFAULT_SOCKET_FILENAME);
615 if (conn->args.socket_filename == NULL)
617 err = memif_syscall_error_handler (errno);
620 strncpy ((char *) conn->args.socket_filename,
621 MEMIF_DEFAULT_SOCKET_DIR, sdl);
622 conn->args.socket_filename[sdl] = '/';
623 strncpy ((char *) (conn->args.socket_filename + 1 + sdl),
624 MEMIF_DEFAULT_SOCKET_FILENAME, sfl);
629 l = strlen ((char *) args->secret);
630 strncpy ((char *) conn->args.secret, (char *) args->secret, l);
633 if (conn->args.is_master)
635 conn->run_args.buffer_size = conn->args.buffer_size;
637 memif_list_elt_t elt;
638 for (i = 0; i < lm->listener_list_len; i++)
641 (memif_socket_t *) lm->listener_list[i].data_struct) != NULL)
644 ((char *) ms->filename, (char *) conn->args.socket_filename,
645 strlen ((char *) ms->filename)) == 0)
647 /* add interface to listener socket */
648 elt.key = conn->args.interface_id;
649 *c = elt.data_struct = conn;
650 add_list_elt (&elt, &ms->interface_list,
651 &ms->interface_list_len);
653 conn->listener_fd = ms->fd;
659 struct stat file_stat;
660 if (stat ((char *) conn->args.socket_filename, &file_stat) == 0)
662 if (S_ISSOCK (file_stat.st_mode))
663 unlink ((char *) conn->args.socket_filename);
665 return memif_syscall_error_handler (errno);
667 DBG ("creating socket file");
668 ms = malloc (sizeof (memif_socket_t));
670 malloc (strlen ((char *) conn->args.socket_filename) +
672 memset (ms->filename, 0,
673 strlen ((char *) conn->args.socket_filename) +
675 strncpy ((char *) ms->filename,
676 (char *) conn->args.socket_filename,
677 strlen ((char *) conn->args.socket_filename));
678 ms->interface_list_len = 1;
680 malloc (sizeof (memif_list_elt_t) * ms->interface_list_len);
681 ms->interface_list[0].key = -1;
682 ms->interface_list[0].data_struct = NULL;
683 struct sockaddr_un un = { 0 };
686 ms->fd = socket (AF_UNIX, SOCK_SEQPACKET, 0);
689 err = memif_syscall_error_handler (errno);
692 DBG ("socket %d created", ms->fd);
693 un.sun_family = AF_UNIX;
694 strncpy ((char *) un.sun_path, (char *) ms->filename,
695 sizeof (un.sun_path) - 1);
698 (ms->fd, SOL_SOCKET, SO_PASSCRED, &on, sizeof (on)) < 0)
700 err = memif_syscall_error_handler (errno);
704 if (bind (ms->fd, (struct sockaddr *) &un, sizeof (un)) < 0)
706 err = memif_syscall_error_handler (errno);
710 if (listen (ms->fd, 1) < 0)
712 err = memif_syscall_error_handler (errno);
716 if (stat ((char *) ms->filename, &file_stat) < 0)
718 err = memif_syscall_error_handler (errno);
722 /* add interface to listener socket */
723 elt.key = conn->args.interface_id;
724 *c = elt.data_struct = conn;
725 add_list_elt (&elt, &ms->interface_list,
726 &ms->interface_list_len);
728 conn->listener_fd = ms->fd;
730 /* add listener socket to libmemif main */
732 elt.data_struct = ms;
733 add_list_elt (&elt, &lm->listener_list, &lm->listener_list_len);
734 lm->control_fd_update (ms->fd, MEMIF_FD_EVENT_READ);
741 if (lm->disconn_slaves == 0)
743 if (timerfd_settime (lm->timerfd, 0, &lm->arm, NULL) < 0)
745 err = memif_syscall_error_handler (errno);
750 lm->disconn_slaves++;
753 *c = list_elt.data_struct = conn;
755 add_list_elt (&list_elt, &lm->control_list,
756 &lm->control_list_len)) < 0)
758 err = MEMIF_ERR_NOMEM;
771 if (conn->args.socket_filename)
772 free (conn->args.socket_filename);
780 memif_control_fd_handler (int fd, uint8_t events)
782 int i, rv, sockfd = -1, err = MEMIF_ERR_SUCCESS; /* 0 */
784 memif_list_elt_t *e = NULL;
785 memif_connection_t *conn;
786 libmemif_main_t *lm = &libmemif_main;
787 if (fd == lm->timerfd)
791 size = read (fd, &b, sizeof (b));
792 for (i = 0; i < lm->control_list_len; i++)
794 if ((lm->control_list[i].key < 0)
795 && (lm->control_list[i].data_struct != NULL))
797 conn = lm->control_list[i].data_struct;
798 if (conn->args.is_master)
801 struct sockaddr_un sun;
802 sockfd = socket (AF_UNIX, SOCK_SEQPACKET, 0);
805 err = memif_syscall_error_handler (errno);
809 sun.sun_family = AF_UNIX;
811 strncpy (sun.sun_path, conn->args.socket_filename,
812 sizeof (sun.sun_path) - 1);
814 if (connect (sockfd, (struct sockaddr *) &sun,
815 sizeof (struct sockaddr_un)) == 0)
818 conn->read_fn = memif_conn_fd_read_ready;
819 conn->write_fn = memif_conn_fd_write_ready;
820 conn->error_fn = memif_conn_fd_error;
822 lm->control_list[conn->index].key = conn->fd;
824 lm->control_fd_update (sockfd,
825 MEMIF_FD_EVENT_READ |
826 MEMIF_FD_EVENT_WRITE);
828 lm->disconn_slaves--;
829 if (lm->disconn_slaves == 0)
831 if (timerfd_settime (lm->timerfd, 0, &lm->disarm, NULL)
834 err = memif_syscall_error_handler (errno);
841 err = memif_syscall_error_handler (errno);
849 get_list_elt (&e, lm->interrupt_list, lm->interrupt_list_len, fd);
852 if (((memif_connection_t *) e->data_struct)->on_interrupt != NULL)
855 (((memif_connection_t *) e->data_struct)->args.
856 is_master) ? ((memif_connection_t *) e->data_struct)->
857 run_args.num_s2m_rings : ((memif_connection_t *) e->
858 data_struct)->run_args.
860 for (i = 0; i < num; i++)
862 if (((memif_connection_t *) e->data_struct)->rx_queues[i].
865 ((memif_connection_t *) e->
866 data_struct)->on_interrupt ((void *) e->data_struct,
867 ((memif_connection_t *)
870 return MEMIF_ERR_SUCCESS;
874 return MEMIF_ERR_SUCCESS;
876 get_list_elt (&e, lm->listener_list, lm->listener_list_len, fd);
879 memif_conn_fd_accept_ready ((memif_socket_t *) e->data_struct);
880 return MEMIF_ERR_SUCCESS;
883 get_list_elt (&e, lm->pending_list, lm->pending_list_len, fd);
886 memif_read_ready (fd);
887 return MEMIF_ERR_SUCCESS;
890 get_list_elt (&e, lm->control_list, lm->control_list_len, fd);
893 if (events & MEMIF_FD_EVENT_READ)
896 ((memif_connection_t *) e->data_struct)->read_fn (e->
898 if (err != MEMIF_ERR_SUCCESS)
901 if (events & MEMIF_FD_EVENT_WRITE)
904 ((memif_connection_t *) e->data_struct)->write_fn (e->
906 if (err != MEMIF_ERR_SUCCESS)
909 if (events & MEMIF_FD_EVENT_ERROR)
912 ((memif_connection_t *) e->data_struct)->error_fn (e->
914 if (err != MEMIF_ERR_SUCCESS)
920 return MEMIF_ERR_SUCCESS; /* 0 */
930 memif_poll_event (int timeout)
932 libmemif_main_t *lm = &libmemif_main;
933 memif_list_elt_t *elt;
934 struct epoll_event evt, *e;
935 int en = 0, err = MEMIF_ERR_SUCCESS, i = 0; /* 0 */
938 uint64_t counter = 0;
940 memset (&evt, 0, sizeof (evt));
941 evt.events = EPOLLIN | EPOLLOUT;
943 sigemptyset (&sigset);
944 en = epoll_pwait (memif_epfd, &evt, 1, timeout, &sigset);
948 DBG ("epoll_pwait: %s", strerror (err));
949 return memif_syscall_error_handler (err);
953 if (evt.data.fd == poll_cancel_fd)
955 r = read (evt.data.fd, &counter, sizeof (counter));
956 return MEMIF_ERR_POLL_CANCEL;
958 if (evt.events & EPOLLIN)
959 events |= MEMIF_FD_EVENT_READ;
960 if (evt.events & EPOLLOUT)
961 events |= MEMIF_FD_EVENT_WRITE;
962 if (evt.events & EPOLLERR)
963 events |= MEMIF_FD_EVENT_ERROR;
964 err = memif_control_fd_handler (evt.data.fd, events);
971 memif_cancel_poll_event ()
973 uint64_t counter = 1;
976 if (poll_cancel_fd == -1)
978 w = write (poll_cancel_fd, &counter, sizeof (counter));
979 if (w < sizeof (counter))
980 return MEMIF_ERR_INT_WRITE;
986 memif_msg_queue_free (memif_msg_queue_elt_t ** e)
990 memif_msg_queue_free (&(*e)->next);
996 /* send disconnect msg and close interface */
998 memif_disconnect_internal (memif_connection_t * c)
1002 DBG ("no connection");
1003 return MEMIF_ERR_NOCONN;
1006 int err = MEMIF_ERR_SUCCESS, i; /* 0 */
1008 libmemif_main_t *lm = &libmemif_main;
1009 memif_list_elt_t *e;
1011 c->on_disconnect ((void *) c, c->private_ctx);
1015 memif_msg_send_disconnect (c->fd, "interface deleted", 0);
1016 lm->control_fd_update (c->fd, MEMIF_FD_EVENT_DEL);
1019 get_list_elt (&e, lm->control_list, lm->control_list_len, c->fd);
1022 if (c->args.is_master)
1023 free_list_elt (lm->control_list, lm->control_list_len, c->fd);
1024 e->key = c->fd = -1;
1027 if (c->tx_queues != NULL)
1030 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1032 for (i = 0; i < num; i++)
1034 mq = &c->tx_queues[i];
1039 free_list_elt (lm->interrupt_list, lm->interrupt_list_len,
1044 free (c->tx_queues);
1045 c->tx_queues = NULL;
1048 if (c->rx_queues != NULL)
1051 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1053 for (i = 0; i < num; i++)
1055 mq = &c->rx_queues[i];
1060 if (c->on_interrupt != NULL)
1061 lm->control_fd_update (mq->int_fd, MEMIF_FD_EVENT_DEL);
1064 free_list_elt (lm->interrupt_list, lm->interrupt_list_len,
1069 free (c->rx_queues);
1070 c->rx_queues = NULL;
1073 if (c->regions != NULL)
1075 if (munmap (c->regions[0].shm, c->regions[0].region_size) < 0)
1076 return memif_syscall_error_handler (errno);
1077 if (c->regions[0].fd > 0)
1078 close (c->regions[0].fd);
1079 c->regions[0].fd = -1;
1084 memset (&c->run_args, 0, sizeof (memif_conn_run_args_t));
1086 memif_msg_queue_free (&c->msg_queue);
1088 if (!(c->args.is_master))
1090 if (lm->disconn_slaves == 0)
1092 if (timerfd_settime (lm->timerfd, 0, &lm->arm, NULL) < 0)
1094 err = memif_syscall_error_handler (errno);
1095 DBG_UNIX ("timerfd_settime: arm");
1098 lm->disconn_slaves++;
1105 memif_delete (memif_conn_handle_t * conn)
1107 memif_connection_t *c = (memif_connection_t *) * conn;
1110 DBG ("no connection");
1111 return MEMIF_ERR_NOCONN;
1113 libmemif_main_t *lm = &libmemif_main;
1114 memif_list_elt_t *e = NULL;
1115 memif_socket_t *ms = NULL;
1117 int err = MEMIF_ERR_SUCCESS;
1121 DBG ("DISCONNECTING");
1122 err = memif_disconnect_internal (c);
1123 if (err == MEMIF_ERR_NOCONN)
1127 free_list_elt_ctx (lm->control_list, lm->control_list_len, c);
1129 if (c->args.is_master)
1131 get_list_elt (&e, lm->listener_list, lm->listener_list_len,
1135 ms = (memif_socket_t *) e->data_struct;
1137 free_list_elt (ms->interface_list, ms->interface_list_len,
1138 c->args.interface_id);
1139 if (ms->use_count <= 0)
1141 lm->control_fd_update (c->listener_fd, MEMIF_FD_EVENT_DEL);
1142 free_list_elt (lm->listener_list, lm->listener_list_len,
1144 close (c->listener_fd);
1145 c->listener_fd = ms->fd = -1;
1146 free (ms->interface_list);
1147 ms->interface_list = NULL;
1148 free (ms->filename);
1149 ms->filename = NULL;
1157 lm->disconn_slaves--;
1158 if (lm->disconn_slaves <= 0)
1160 if (timerfd_settime (lm->timerfd, 0, &lm->disarm, NULL) < 0)
1162 err = memif_syscall_error_handler (errno);
1163 DBG ("timerfd_settime: disarm");
1168 if (c->args.socket_filename)
1169 free (c->args.socket_filename);
1170 c->args.socket_filename = NULL;
1180 memif_connect1 (memif_connection_t * c)
1182 libmemif_main_t *lm = &libmemif_main;
1183 memif_region_t *mr = c->regions;
1193 return MEMIF_ERR_NO_SHMFD;
1195 if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
1196 MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
1198 return memif_syscall_error_handler (errno);
1204 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1206 for (i = 0; i < num; i++)
1208 mq = &c->tx_queues[i];
1211 mq->ring = c->regions[mq->region].shm + mq->offset;
1212 if (mq->ring->cookie != MEMIF_COOKIE)
1214 DBG ("wrong cookie on tx ring %u", i);
1215 return MEMIF_ERR_COOKIE;
1217 mq->ring->head = mq->ring->tail = mq->last_head = mq->alloc_bufs =
1222 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1224 for (i = 0; i < num; i++)
1226 mq = &c->rx_queues[i];
1229 mq->ring = c->regions[mq->region].shm + mq->offset;
1230 if (mq->ring->cookie != MEMIF_COOKIE)
1232 DBG ("wrong cookie on rx ring %u", i);
1233 return MEMIF_ERR_COOKIE;
1235 mq->ring->head = mq->ring->tail = mq->last_head = mq->alloc_bufs =
1240 lm->control_fd_update (c->fd, MEMIF_FD_EVENT_READ | MEMIF_FD_EVENT_MOD);
1246 memif_init_regions_and_queues (memif_connection_t * conn)
1248 memif_ring_t *ring = NULL;
1249 uint64_t buffer_offset;
1252 libmemif_main_t *lm = &libmemif_main;
1255 conn->regions = (memif_region_t *) malloc (sizeof (memif_region_t));
1256 if (conn->regions == NULL)
1257 return memif_syscall_error_handler (errno);
1261 (conn->run_args.num_s2m_rings +
1262 conn->run_args.num_m2s_rings) * (sizeof (memif_ring_t) +
1263 sizeof (memif_desc_t) *
1264 (1 << conn->run_args.log2_ring_size));
1266 r->region_size = buffer_offset +
1267 conn->run_args.buffer_size * (1 << conn->run_args.log2_ring_size) *
1268 (conn->run_args.num_s2m_rings + conn->run_args.num_m2s_rings);
1270 if ((r->fd = memfd_create ("memif region 0", MFD_ALLOW_SEALING)) == -1)
1271 return memif_syscall_error_handler (errno);
1273 if ((fcntl (r->fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
1274 return memif_syscall_error_handler (errno);
1276 if ((ftruncate (r->fd, r->region_size)) == -1)
1277 return memif_syscall_error_handler (errno);
1279 if ((r->shm = mmap (NULL, r->region_size, PROT_READ | PROT_WRITE,
1280 MAP_SHARED, r->fd, 0)) == MAP_FAILED)
1281 return memif_syscall_error_handler (errno);
1283 for (i = 0; i < conn->run_args.num_s2m_rings; i++)
1285 ring = memif_get_ring (conn, MEMIF_RING_S2M, i);
1286 DBG ("RING: %p I: %d", ring, i);
1287 ring->head = ring->tail = 0;
1288 ring->cookie = MEMIF_COOKIE;
1290 for (j = 0; j < (1 << conn->run_args.log2_ring_size); j++)
1292 uint16_t slot = i * (1 << conn->run_args.log2_ring_size) + j;
1293 ring->desc[j].region = 0;
1294 ring->desc[j].offset = buffer_offset +
1295 (uint32_t) (slot * conn->run_args.buffer_size);
1296 ring->desc[j].buffer_length = conn->run_args.buffer_size;
1299 for (i = 0; i < conn->run_args.num_m2s_rings; i++)
1301 ring = memif_get_ring (conn, MEMIF_RING_M2S, i);
1302 DBG ("RING: %p I: %d", ring, i);
1303 ring->head = ring->tail = 0;
1304 ring->cookie = MEMIF_COOKIE;
1306 for (j = 0; j < (1 << conn->run_args.log2_ring_size); j++)
1310 conn->run_args.num_s2m_rings) *
1311 (1 << conn->run_args.log2_ring_size) + j;
1312 ring->desc[j].region = 0;
1313 ring->desc[j].offset = buffer_offset +
1314 (uint32_t) (slot * conn->run_args.buffer_size);
1315 ring->desc[j].buffer_length = conn->run_args.buffer_size;
1320 (memif_queue_t *) malloc (sizeof (memif_queue_t) *
1321 conn->run_args.num_s2m_rings);
1323 return memif_syscall_error_handler (errno);
1325 for (x = 0; x < conn->run_args.num_s2m_rings; x++)
1327 if ((mq[x].int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
1328 return memif_syscall_error_handler (errno);
1329 /* add int fd to interrupt fd list */
1330 e.key = mq[x].int_fd;
1331 e.data_struct = conn;
1332 add_list_elt (&e, &lm->interrupt_list, &lm->interrupt_list_len);
1334 mq[x].ring = memif_get_ring (conn, MEMIF_RING_S2M, x);
1335 DBG ("RING: %p I: %d", mq[x].ring, x);
1336 mq[x].log2_ring_size = conn->run_args.log2_ring_size;
1339 (void *) mq[x].ring - (void *) conn->regions[mq->region].shm;
1340 mq[x].last_head = 0;
1341 mq[x].alloc_bufs = 0;
1343 conn->tx_queues = mq;
1346 (memif_queue_t *) malloc (sizeof (memif_queue_t) *
1347 conn->run_args.num_m2s_rings);
1349 return memif_syscall_error_handler (errno);
1350 for (x = 0; x < conn->run_args.num_m2s_rings; x++)
1352 if ((mq[x].int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
1353 return memif_syscall_error_handler (errno);
1354 /* add int fd to interrupt fd list */
1355 e.key = mq[x].int_fd;
1356 e.data_struct = conn;
1357 add_list_elt (&e, &lm->interrupt_list, &lm->interrupt_list_len);
1359 mq[x].ring = memif_get_ring (conn, MEMIF_RING_M2S, x);
1360 DBG ("RING: %p I: %d", mq[x].ring, x);
1361 mq[x].log2_ring_size = conn->run_args.log2_ring_size;
1364 (void *) mq[x].ring - (void *) conn->regions[mq->region].shm;
1365 mq[x].last_head = 0;
1366 mq[x].alloc_bufs = 0;
1368 conn->rx_queues = mq;
1374 memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid,
1375 memif_buffer_t * bufs, uint16_t count,
1376 uint16_t * count_out, uint16_t size)
1378 memif_connection_t *c = (memif_connection_t *) conn;
1380 return MEMIF_ERR_NOCONN;
1382 return MEMIF_ERR_DISCONNECTED;
1384 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1387 return MEMIF_ERR_QID;
1388 memif_queue_t *mq = &c->tx_queues[qid];
1389 memif_ring_t *ring = mq->ring;
1390 memif_buffer_t *b0, *b1;
1391 uint8_t chain_buf0, chain_buf1;
1392 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1393 uint16_t s0, s1, ns;
1395 int i, err = MEMIF_ERR_SUCCESS; /* 0 */
1397 if (ring->tail != ring->head)
1399 if (ring->head > ring->tail)
1400 ns = (1 << mq->log2_ring_size) - ring->head + ring->tail;
1402 ns = ring->tail - ring->head;
1405 ns = (1 << mq->log2_ring_size);
1407 /* (head == tail) ? receive function will asume that no packets are available */
1412 while ((count > 2) && (ns > 2))
1414 s0 = (ring->head + mq->alloc_bufs) & mask;
1415 chain_buf0 = size / ring->desc[s0].buffer_length;
1416 if (((size % ring->desc[s0].buffer_length) != 0) || (size == 0))
1419 if (chain_buf0 > ns)
1422 s1 = (ring->head + mq->alloc_bufs + chain_buf0) & mask;
1423 chain_buf1 = size / ring->desc[s1].buffer_length;
1424 if (((size % ring->desc[s1].buffer_length) != 0) || (size == 0))
1427 if ((chain_buf0 + chain_buf1) > ns)
1430 b0 = (bufs + *count_out);
1431 b1 = (bufs + *count_out + 1);
1433 b0->desc_index = s0;
1434 b1->desc_index = s1;
1435 ring->desc[s0].flags = 0;
1436 ring->desc[s1].flags = 0;
1437 b0->buffer_len = ring->desc[s0].buffer_length * chain_buf0;
1438 b1->buffer_len = ring->desc[s1].buffer_length * chain_buf1;
1439 /* TODO: support multiple regions -> ring descriptor contains region index */
1440 b0->data = c->regions->shm + ring->desc[s0].offset;
1441 b1->data = c->regions->shm + ring->desc[s1].offset;
1443 for (i = 0; i < (memif_min (chain_buf0, chain_buf1) - 1); i++)
1445 ring->desc[(s0 + i) & mask].flags |= MEMIF_DESC_FLAG_NEXT;
1446 ring->desc[(s1 + i) & mask].flags |= MEMIF_DESC_FLAG_NEXT;
1447 DBG ("allocating chained buffers");
1450 if (chain_buf0 > chain_buf1)
1452 for (; i < (chain_buf0 - 1); i++)
1453 ring->desc[(s0 + i) & mask].flags |= MEMIF_DESC_FLAG_NEXT;
1457 for (; i < (chain_buf1 - 1); i++)
1458 ring->desc[(s1 + i) & mask].flags |= MEMIF_DESC_FLAG_NEXT;
1461 mq->alloc_bufs += chain_buf0 + chain_buf1;
1463 DBG ("allocated ring slots %u, %u", s0, s1);
1465 ns -= chain_buf0 + chain_buf1;
1468 s0 = (ring->head + mq->alloc_bufs) & mask;
1470 b0 = (bufs + *count_out);
1472 chain_buf0 = size / ring->desc[s0].buffer_length;
1473 if (((size % ring->desc[s0].buffer_length) != 0) || (size == 0))
1476 if (chain_buf0 > ns)
1479 b0->desc_index = s0;
1480 ring->desc[s0].flags = 0;
1481 b0->buffer_len = ring->desc[s0].buffer_length * chain_buf0;
1482 b0->data = c->regions->shm + ring->desc[s0].offset;
1484 for (i = 0; i < (chain_buf0 - 1); i++)
1486 ring->desc[(s0 + i) & mask].flags |= MEMIF_DESC_FLAG_NEXT;
1487 DBG ("allocating chained buffers");
1490 mq->alloc_bufs += chain_buf0;
1492 DBG ("allocated ring slot %u", s0);
1498 DBG ("allocated: %u/%u bufs. Total %u allocated bufs", *count_out, count,
1503 DBG ("ring buffer full! qid: %u", qid);
1504 err = MEMIF_ERR_NOBUF_RING;
1511 memif_buffer_free (memif_conn_handle_t conn, uint16_t qid,
1512 memif_buffer_t * bufs, uint16_t count,
1513 uint16_t * count_out)
1515 memif_connection_t *c = (memif_connection_t *) conn;
1517 return MEMIF_ERR_NOCONN;
1519 return MEMIF_ERR_DISCONNECTED;
1521 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1524 return MEMIF_ERR_QID;
1525 libmemif_main_t *lm = &libmemif_main;
1526 memif_queue_t *mq = &c->rx_queues[qid];
1527 memif_ring_t *ring = mq->ring;
1528 uint16_t tail = ring->tail;
1529 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1530 uint8_t chain_buf0, chain_buf1;
1531 memif_buffer_t *b0, *b1;
1534 if (mq->alloc_bufs < count)
1535 count = mq->alloc_bufs;
1541 b0 = (bufs + *count_out);
1542 b1 = (bufs + *count_out + 1);
1544 b0->buffer_len / ring->desc[b0->desc_index].buffer_length;
1545 if ((b0->buffer_len % ring->desc[b0->desc_index].buffer_length) !=
1549 b1->buffer_len / ring->desc[b1->desc_index].buffer_length;
1550 if ((b1->buffer_len % ring->desc[b1->desc_index].buffer_length) !=
1553 tail = (b1->desc_index + chain_buf1) & mask;
1559 mq->alloc_bufs -= chain_buf0 + chain_buf1;
1561 b0 = (bufs + *count_out);
1562 chain_buf0 = b0->buffer_len / ring->desc[b0->desc_index].buffer_length;
1563 if ((b0->buffer_len % ring->desc[b0->desc_index].buffer_length) != 0)
1565 tail = (b0->desc_index + chain_buf0) & mask;
1570 mq->alloc_bufs -= chain_buf0;
1572 MEMIF_MEMORY_BARRIER ();
1574 DBG ("tail: %u", ring->tail);
1576 return MEMIF_ERR_SUCCESS; /* 0 */
1580 memif_tx_burst (memif_conn_handle_t conn, uint16_t qid,
1581 memif_buffer_t * bufs, uint16_t count, uint16_t * tx)
1583 memif_connection_t *c = (memif_connection_t *) conn;
1585 return MEMIF_ERR_NOCONN;
1587 return MEMIF_ERR_DISCONNECTED;
1589 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
1592 return MEMIF_ERR_QID;
1593 memif_queue_t *mq = &c->tx_queues[qid];
1594 memif_ring_t *ring = mq->ring;
1595 uint16_t head = ring->head;
1596 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1597 uint8_t chain_buf0, chain_buf1;
1599 uint16_t curr_buf = 0;
1600 memif_buffer_t *b0, *b1;
1607 b0 = (bufs + curr_buf);
1608 b1 = (bufs + curr_buf + 1);
1610 b0->buffer_len / ring->desc[b0->desc_index].buffer_length;
1611 if ((b0->buffer_len % ring->desc[b0->desc_index].buffer_length) !=
1616 b1->buffer_len / ring->desc[b1->desc_index].buffer_length;
1617 if ((b1->buffer_len % ring->desc[b1->desc_index].buffer_length) !=
1621 for (i = 0; i < memif_min (chain_buf0, chain_buf1); i++)
1625 ring->desc[(b0->desc_index + i) & mask].buffer_length)
1628 ring->desc[(b0->desc_index + i) & mask].length =
1629 ring->desc[(b0->desc_index + i) & mask].buffer_length;
1633 ring->desc[(b0->desc_index + i) & mask].length =
1639 ring->desc[(b1->desc_index + i) & mask].buffer_length)
1642 ring->desc[(b1->desc_index + i) & mask].length =
1643 ring->desc[(b1->desc_index + i) & mask].buffer_length;
1647 ring->desc[(b1->desc_index + i) & mask].length =
1651 #ifdef MEMIF_DBG_SHM
1652 print_bytes (b0->data +
1653 ring->desc[(b0->desc_index +
1654 i) & mask].buffer_length *
1656 ring->desc[(b0->desc_index +
1657 i) & mask].buffer_length, DBG_TX_BUF);
1658 print_bytes (b1->data +
1659 ring->desc[(b1->desc_index +
1660 i) & mask].buffer_length *
1662 ring->desc[(b1->desc_index +
1663 i) & mask].buffer_length, DBG_TX_BUF);
1664 #endif /* MEMIF_DBG_SHM */
1667 if (chain_buf0 > chain_buf1)
1669 for (; i < chain_buf0; i++)
1672 ring->desc[(b0->desc_index + i) & mask].buffer_length)
1675 ring->desc[(b0->desc_index + i) & mask].length =
1676 ring->desc[(b0->desc_index + i) & mask].buffer_length;
1680 ring->desc[(b0->desc_index + i) & mask].length =
1684 #ifdef MEMIF_DBG_SHM
1685 print_bytes (b0->data +
1686 ring->desc[(b0->desc_index +
1687 i) & mask].buffer_length *
1689 ring->desc[(b0->desc_index +
1690 i) & mask].buffer_length,
1692 #endif /* MEMIF_DBG_SHM */
1697 for (; i < chain_buf1; i++)
1700 ring->desc[(b1->desc_index + i) & mask].buffer_length)
1703 ring->desc[(b1->desc_index + i) & mask].length =
1704 ring->desc[(b1->desc_index + i) & mask].buffer_length;
1708 ring->desc[(b1->desc_index + i) & mask].length =
1712 #ifdef MEMIF_DBG_SHM
1713 print_bytes (b1->data +
1714 ring->desc[(b1->desc_index +
1715 i) & mask].buffer_length *
1717 ring->desc[(b1->desc_index +
1718 i) & mask].buffer_length,
1720 #endif /* MEMIF_DBG_SHM */
1724 head = (b1->desc_index + chain_buf1) & mask;
1728 if (b0->data_len != 0)
1729 DBG ("invalid b0 data length!");
1730 #endif /* MEMIF_DBG */
1733 if (b1->data_len != 0)
1734 DBG ("invalid b1 data length!");
1735 #endif /* MEMIF_DBG */
1738 *tx += chain_buf0 + chain_buf1;
1742 b0 = (bufs + curr_buf);
1743 chain_buf0 = b0->buffer_len / ring->desc[b0->desc_index].buffer_length;
1744 if ((b0->buffer_len % ring->desc[b0->desc_index].buffer_length) != 0)
1747 for (i = 0; i < chain_buf0; i++)
1750 ring->desc[(b0->desc_index + i) & mask].buffer_length)
1752 b0->data_len -= ring->desc[(b0->desc_index + i) & mask].length =
1753 ring->desc[(b0->desc_index + i) & mask].buffer_length;
1757 ring->desc[(b0->desc_index + i) & mask].length = b0->data_len;
1760 #ifdef MEMIF_DBG_SHM
1761 print_bytes (b0->data +
1762 ring->desc[(b0->desc_index + i) & mask].buffer_length *
1764 ring->desc[(b0->desc_index + i) & mask].buffer_length,
1766 #endif /* MEMIF_DBG_SHM */
1769 head = (b0->desc_index + chain_buf0) & mask;
1773 if (b0->data_len != 0)
1774 DBG ("invalid b0 data length!");
1775 #endif /* MEMIF_DBG */
1781 MEMIF_MEMORY_BARRIER ();
1784 mq->alloc_bufs -= *tx;
1786 /* TODO: return num of buffers and packets */
1789 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0)
1792 int r = write (mq->int_fd, &a, sizeof (a));
1794 return MEMIF_ERR_INT_WRITE;
1797 return MEMIF_ERR_SUCCESS; /* 0 */
1801 memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
1802 memif_buffer_t * bufs, uint16_t count, uint16_t * rx)
1804 memif_connection_t *c = (memif_connection_t *) conn;
1806 return MEMIF_ERR_NOCONN;
1808 return MEMIF_ERR_DISCONNECTED;
1810 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
1813 return MEMIF_ERR_QID;
1814 memif_queue_t *mq = &c->rx_queues[qid];
1815 memif_ring_t *ring = mq->ring;
1816 uint16_t head = ring->head;
1818 uint16_t mask = (1 << mq->log2_ring_size) - 1;
1819 memif_buffer_t *b0, *b1;
1820 uint16_t curr_buf = 0;
1825 ssize_t r = read (mq->int_fd, &b, sizeof (b));
1826 if ((r == -1) && (errno != EAGAIN))
1827 return memif_syscall_error_handler (errno);
1829 if (head == mq->last_head)
1832 if (head > mq->last_head)
1833 ns = head - mq->last_head;
1835 ns = (1 << mq->log2_ring_size) - mq->last_head + head;
1839 DBG ("ns: %u, count: %u", ns, count);
1840 while ((ns > 2) && (count > 2))
1842 b0 = (bufs + curr_buf);
1843 b1 = (bufs + curr_buf + 1);
1845 b0->desc_index = mq->last_head;
1850 b0->data = memif_get_buffer (conn, ring, mq->last_head);
1851 b0->data_len += ring->desc[mq->last_head].length;
1852 b0->buffer_len += ring->desc[mq->last_head].buffer_length;
1853 #ifdef MEMIF_DBG_SHM
1854 print_bytes (b0->data +
1855 ring->desc[b0->desc_index].buffer_length * i++,
1856 ring->desc[b0->desc_index].buffer_length, DBG_TX_BUF);
1857 #endif /* MEMIF_DBG_SHM */
1860 while (ring->desc[mq->last_head].flags & MEMIF_DESC_FLAG_NEXT)
1862 ring->desc[mq->last_head].flags &= ~MEMIF_DESC_FLAG_NEXT;
1863 mq->last_head = (mq->last_head + 1) & mask;
1864 b0->data_len += ring->desc[mq->last_head].length;
1865 b0->buffer_len += ring->desc[mq->last_head].buffer_length;
1866 #ifdef MEMIF_DBG_SHM
1867 print_bytes (b0->data +
1868 ring->desc[b0->desc_index].buffer_length * i++,
1869 ring->desc[b0->desc_index].buffer_length,
1871 #endif /* MEMIF_DBG_SHM */
1875 mq->last_head = (mq->last_head + 1) & mask;
1877 b1->desc_index = mq->last_head;
1882 b1->data = memif_get_buffer (conn, ring, mq->last_head);
1883 b1->data_len += ring->desc[mq->last_head].length;
1884 b1->buffer_len += ring->desc[mq->last_head].buffer_length;
1885 #ifdef MEMIF_DBG_SHM
1886 print_bytes (b1->data +
1887 ring->desc[b1->desc_index].buffer_length * i++,
1888 ring->desc[b1->desc_index].buffer_length, DBG_TX_BUF);
1889 #endif /* MEMIF_DBG_SHM */
1892 while (ring->desc[mq->last_head].flags & MEMIF_DESC_FLAG_NEXT)
1894 ring->desc[mq->last_head].flags &= ~MEMIF_DESC_FLAG_NEXT;
1895 mq->last_head = (mq->last_head + 1) & mask;
1896 b1->data_len += ring->desc[mq->last_head].length;
1897 b1->buffer_len += ring->desc[mq->last_head].buffer_length;
1898 #ifdef MEMIF_DBG_SHM
1899 print_bytes (b1->data +
1900 ring->desc[b1->desc_index].buffer_length * i++,
1901 ring->desc[b1->desc_index].buffer_length,
1903 #endif /* MEMIF_DBG_SHM */
1907 mq->last_head = (mq->last_head + 1) & mask;
1912 b0 = (bufs + curr_buf);
1914 b0->desc_index = mq->last_head;
1919 b0->data = memif_get_buffer (conn, ring, mq->last_head);
1920 b0->data_len += ring->desc[mq->last_head].length;
1921 b0->buffer_len += ring->desc[mq->last_head].buffer_length;
1922 #ifdef MEMIF_DBG_SHM
1923 print_bytes (b0->data +
1924 ring->desc[b0->desc_index].buffer_length * i++,
1925 ring->desc[b0->desc_index].buffer_length, DBG_TX_BUF);
1926 #endif /* MEMIF_DBG_SHM */
1930 while (ring->desc[mq->last_head].flags & MEMIF_DESC_FLAG_NEXT)
1932 ring->desc[mq->last_head].flags &= ~MEMIF_DESC_FLAG_NEXT;
1933 mq->last_head = (mq->last_head + 1) & mask;
1934 b0->data_len += ring->desc[mq->last_head].length;
1935 b0->buffer_len += ring->desc[mq->last_head].buffer_length;
1936 #ifdef MEMIF_DBG_SHM
1937 print_bytes (b0->data +
1938 ring->desc[b0->desc_index].buffer_length * i++,
1939 ring->desc[b0->desc_index].buffer_length, DBG_TX_BUF);
1940 #endif /* MEMIF_DBG_SHM */
1944 mq->last_head = (mq->last_head + 1) & mask;
1950 mq->alloc_bufs += *rx;
1952 /* TODO: return num of buffers and packets */
1957 DBG ("not enough buffers!");
1958 return MEMIF_ERR_NOBUF;
1961 return MEMIF_ERR_SUCCESS; /* 0 */
1965 memif_get_details (memif_conn_handle_t conn, memif_details_t * md,
1966 char *buf, ssize_t buflen)
1968 memif_connection_t *c = (memif_connection_t *) conn;
1970 return MEMIF_ERR_NOCONN;
1972 int err = MEMIF_ERR_SUCCESS, i;
1973 ssize_t l0, l1, total_l;
1976 l1 = strlen ((char *) c->args.interface_name);
1977 if (l0 + l1 < buflen)
1979 md->if_name = strcpy (buf + l0, (char *) c->args.interface_name);
1983 err = MEMIF_ERR_NOBUF_DET;
1985 l1 = strlen ((char *) c->args.instance_name);
1986 if (l0 + l1 < buflen)
1988 md->inst_name = strcpy (buf + l0, (char *) c->args.instance_name);
1992 err = MEMIF_ERR_NOBUF_DET;
1994 l1 = strlen ((char *) c->remote_if_name);
1995 if (l0 + l1 < buflen)
1997 md->remote_if_name = strcpy (buf + l0, (char *) c->remote_if_name);
2001 err = MEMIF_ERR_NOBUF_DET;
2003 l1 = strlen ((char *) c->remote_name);
2004 if (l0 + l1 < buflen)
2006 md->remote_inst_name = strcpy (buf + l0, (char *) c->remote_name);
2010 err = MEMIF_ERR_NOBUF_DET;
2012 md->id = c->args.interface_id;
2016 l1 = strlen ((char *) c->args.secret);
2017 if (l0 + l1 < buflen)
2019 md->secret = strcpy (buf + l0, (char *) c->args.secret);
2023 err = MEMIF_ERR_NOBUF_DET;
2026 md->role = (c->args.is_master) ? 0 : 1;
2027 md->mode = c->args.mode;
2029 l1 = strlen ((char *) c->args.socket_filename);
2030 if (l0 + l1 < buflen)
2032 md->socket_filename =
2033 strcpy (buf + l0, (char *) c->args.socket_filename);
2037 err = MEMIF_ERR_NOBUF_DET;
2040 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
2043 l1 = sizeof (memif_queue_details_t) * md->rx_queues_num;
2044 if (l0 + l1 <= buflen)
2046 md->rx_queues = (memif_queue_details_t *) buf + l0;
2050 err = MEMIF_ERR_NOBUF_DET;
2052 for (i = 0; i < md->rx_queues_num; i++)
2054 md->rx_queues[i].qid = i;
2055 md->rx_queues[i].ring_size = (1 << c->rx_queues[i].log2_ring_size);
2056 md->rx_queues[i].buffer_size = c->run_args.buffer_size;
2060 (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
2063 l1 = sizeof (memif_queue_details_t) * md->tx_queues_num;
2064 if (l0 + l1 <= buflen)
2066 md->tx_queues = (memif_queue_details_t *) buf + l0;
2070 err = MEMIF_ERR_NOBUF_DET;
2072 for (i = 0; i < md->tx_queues_num; i++)
2074 md->tx_queues[i].qid = i;
2075 md->tx_queues[i].ring_size = (1 << c->tx_queues[i].log2_ring_size);
2076 md->tx_queues[i].buffer_size = c->run_args.buffer_size;
2079 md->link_up_down = (c->fd > 0) ? 1 : 0;
2085 memif_get_queue_efd (memif_conn_handle_t conn, uint16_t qid, int *efd)
2087 memif_connection_t *c = (memif_connection_t *) conn;
2090 return MEMIF_ERR_NOCONN;
2092 return MEMIF_ERR_DISCONNECTED;
2094 (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
2097 return MEMIF_ERR_QID;
2099 *efd = c->rx_queues[qid].int_fd;
2101 return MEMIF_ERR_SUCCESS;
2107 libmemif_main_t *lm = &libmemif_main;
2109 free (lm->app_name);
2110 lm->app_name = NULL;
2111 if (lm->control_list)
2112 free (lm->control_list);
2113 lm->control_list = NULL;
2114 if (lm->interrupt_list)
2115 free (lm->interrupt_list);
2116 lm->interrupt_list = NULL;
2117 if (lm->listener_list)
2118 free (lm->listener_list);
2119 lm->listener_list = NULL;
2120 if (lm->pending_list)
2121 free (lm->pending_list);
2122 lm->pending_list = NULL;
2123 if (poll_cancel_fd != -1)
2124 close (poll_cancel_fd);
2126 return MEMIF_ERR_SUCCESS; /* 0 */