lib/librte_pdump/rte_pdump.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2016 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/socket.h>
  35 #include <sys/un.h>
  36 #include <sys/stat.h>
  37 #include <unistd.h>
  38 #include <sys/types.h>
  39 #include <pthread.h>
  40 #include <stdbool.h>
  41 #include <stdio.h>
  42
  43 #include <rte_memcpy.h>
  44 #include <rte_mbuf.h>
  45 #include <rte_ethdev.h>
  46 #include <rte_lcore.h>
  47 #include <rte_log.h>
  48 #include <rte_errno.h>
  49
  50 #include "rte_pdump.h"
  51
  52 #define SOCKET_PATH_VAR_RUN "/var/run"
  53 #define SOCKET_PATH_HOME "HOME"
  54 #define DPDK_DIR         "/.dpdk"
  55 #define SOCKET_DIR       "/pdump_sockets"
  56 #define SERVER_SOCKET "%s/pdump_server_socket"
  57 #define CLIENT_SOCKET "%s/pdump_client_socket_%d_%u"
  58 #define DEVICE_ID_SIZE 64
  59 /* Macros for printing using RTE_LOG */
  60 #define RTE_LOGTYPE_PDUMP RTE_LOGTYPE_USER1
  61
  62 enum pdump_operation {
  63         DISABLE = 1,
  64         ENABLE = 2
  65 };
  66
  67 enum pdump_version {
  68         V1 = 1
  69 };
  70
  71 static pthread_t pdump_thread;
  72 static int pdump_socket_fd;
  73 static char server_socket_dir[PATH_MAX];
  74 static char client_socket_dir[PATH_MAX];
  75
  76 struct pdump_request {
  77         uint16_t ver;
  78         uint16_t op;
  79         uint32_t flags;
  80         union pdump_data {
  81                 struct enable_v1 {
  82                         char device[DEVICE_ID_SIZE];
  83                         uint16_t queue;
  84                         struct rte_ring *ring;
  85                         struct rte_mempool *mp;
  86                         void *filter;
  87                 } en_v1;
  88                 struct disable_v1 {
  89                         char device[DEVICE_ID_SIZE];
  90                         uint16_t queue;
  91                         struct rte_ring *ring;
  92                         struct rte_mempool *mp;
  93                         void *filter;
  94                 } dis_v1;
  95         } data;
  96 };
  97
  98 struct pdump_response {
  99         uint16_t ver;
 100         uint16_t res_op;
 101         int32_t err_value;
 102 };
 103
 104 static struct pdump_rxtx_cbs {
 105         struct rte_ring *ring;
 106         struct rte_mempool *mp;
 107         struct rte_eth_rxtx_callback *cb;
 108         void *filter;
 109 } rx_cbs[RTE_MAX_ETHPORTS][RTE_MAX_QUEUES_PER_PORT],
 110 tx_cbs[RTE_MAX_ETHPORTS][RTE_MAX_QUEUES_PER_PORT];
 111
 112 static inline int
 113 pdump_pktmbuf_copy_data(struct rte_mbuf *seg, const struct rte_mbuf *m)
 114 {
 115         if (rte_pktmbuf_tailroom(seg) < m->data_len) {
 116                 RTE_LOG(ERR, PDUMP,
 117                         "User mempool: insufficient data_len of mbuf\n");
 118                 return -EINVAL;
 119         }
 120
 121         seg->port = m->port;
 122         seg->vlan_tci = m->vlan_tci;
 123         seg->hash = m->hash;
 124         seg->tx_offload = m->tx_offload;
 125         seg->ol_flags = m->ol_flags;
 126         seg->packet_type = m->packet_type;
 127         seg->vlan_tci_outer = m->vlan_tci_outer;
 128         seg->data_len = m->data_len;
 129         seg->pkt_len = seg->data_len;
 130         rte_memcpy(rte_pktmbuf_mtod(seg, void *),
 131                         rte_pktmbuf_mtod(m, void *),
 132                         rte_pktmbuf_data_len(seg));
 133
 134         return 0;
 135 }
 136
 137 static inline struct rte_mbuf *
 138 pdump_pktmbuf_copy(struct rte_mbuf *m, struct rte_mempool *mp)
 139 {
 140         struct rte_mbuf *m_dup, *seg, **prev;
 141         uint32_t pktlen;
 142         uint16_t nseg;
 143
 144         m_dup = rte_pktmbuf_alloc(mp);
 145         if (unlikely(m_dup == NULL))
 146                 return NULL;
 147
 148         seg = m_dup;
 149         prev = &seg->next;
 150         pktlen = m->pkt_len;
 151         nseg = 0;
 152
 153         do {
 154                 nseg++;
 155                 if (pdump_pktmbuf_copy_data(seg, m) < 0) {
 156                         if (seg != m_dup)
 157                                 rte_pktmbuf_free_seg(seg);
 158                         rte_pktmbuf_free(m_dup);
 159                         return NULL;
 160                 }
 161                 *prev = seg;
 162                 prev = &seg->next;
 163         } while ((m = m->next) != NULL &&
 164                         (seg = rte_pktmbuf_alloc(mp)) != NULL);
 165
 166         *prev = NULL;
 167         m_dup->nb_segs = nseg;
 168         m_dup->pkt_len = pktlen;
 169
 170         /* Allocation of new indirect segment failed */
 171         if (unlikely(seg == NULL)) {
 172                 rte_pktmbuf_free(m_dup);
 173                 return NULL;
 174         }
 175
 176         __rte_mbuf_sanity_check(m_dup, 1);
 177         return m_dup;
 178 }
 179
 180 static inline void
 181 pdump_copy(struct rte_mbuf **pkts, uint16_t nb_pkts, void *user_params)
 182 {
 183         unsigned i;
 184         int ring_enq;
 185         uint16_t d_pkts = 0;
 186         struct rte_mbuf *dup_bufs[nb_pkts];
 187         struct pdump_rxtx_cbs *cbs;
 188         struct rte_ring *ring;
 189         struct rte_mempool *mp;
 190         struct rte_mbuf *p;
 191
 192         cbs  = user_params;
 193         ring = cbs->ring;
 194         mp = cbs->mp;
 195         for (i = 0; i < nb_pkts; i++) {
 196                 p = pdump_pktmbuf_copy(pkts[i], mp);
 197                 if (p)
 198                         dup_bufs[d_pkts++] = p;
 199         }
 200
 201         ring_enq = rte_ring_enqueue_burst(ring, (void *)dup_bufs, d_pkts, NULL);
 202         if (unlikely(ring_enq < d_pkts)) {
 203                 RTE_LOG(DEBUG, PDUMP,
 204                         "only %d of packets enqueued to ring\n", ring_enq);
 205                 do {
 206                         rte_pktmbuf_free(dup_bufs[ring_enq]);
 207                 } while (++ring_enq < d_pkts);
 208         }
 209 }
 210
 211 static uint16_t
 212 pdump_rx(uint16_t port __rte_unused, uint16_t qidx __rte_unused,
 213         struct rte_mbuf **pkts, uint16_t nb_pkts,
 214         uint16_t max_pkts __rte_unused,
 215         void *user_params)
 216 {
 217         pdump_copy(pkts, nb_pkts, user_params);
 218         return nb_pkts;
 219 }
 220
 221 static uint16_t
 222 pdump_tx(uint16_t port __rte_unused, uint16_t qidx __rte_unused,
 223                 struct rte_mbuf **pkts, uint16_t nb_pkts, void *user_params)
 224 {
 225         pdump_copy(pkts, nb_pkts, user_params);
 226         return nb_pkts;
 227 }
 228
 229 static int
 230 pdump_register_rx_callbacks(uint16_t end_q, uint16_t port, uint16_t queue,
 231                                 struct rte_ring *ring, struct rte_mempool *mp,
 232                                 uint16_t operation)
 233 {
 234         uint16_t qid;
 235         struct pdump_rxtx_cbs *cbs = NULL;
 236
 237         qid = (queue == RTE_PDUMP_ALL_QUEUES) ? 0 : queue;
 238         for (; qid < end_q; qid++) {
 239                 cbs = &rx_cbs[port][qid];
 240                 if (cbs && operation == ENABLE) {
 241                         if (cbs->cb) {
 242                                 RTE_LOG(ERR, PDUMP,
 243                                         "failed to add rx callback for port=%d "
 244                                         "and queue=%d, callback already exists\n",
 245                                         port, qid);
 246                                 return -EEXIST;
 247                         }
 248                         cbs->ring = ring;
 249                         cbs->mp = mp;
 250                         cbs->cb = rte_eth_add_first_rx_callback(port, qid,
 251                                                                 pdump_rx, cbs);
 252                         if (cbs->cb == NULL) {
 253                                 RTE_LOG(ERR, PDUMP,
 254                                         "failed to add rx callback, errno=%d\n",
 255                                         rte_errno);
 256                                 return rte_errno;
 257                         }
 258                 }
 259                 if (cbs && operation == DISABLE) {
 260                         int ret;
 261
 262                         if (cbs->cb == NULL) {
 263                                 RTE_LOG(ERR, PDUMP,
 264                                         "failed to delete non existing rx "
 265                                         "callback for port=%d and queue=%d\n",
 266                                         port, qid);
 267                                 return -EINVAL;
 268                         }
 269                         ret = rte_eth_remove_rx_callback(port, qid, cbs->cb);
 270                         if (ret < 0) {
 271                                 RTE_LOG(ERR, PDUMP,
 272                                         "failed to remove rx callback, errno=%d\n",
 273                                         -ret);
 274                                 return ret;
 275                         }
 276                         cbs->cb = NULL;
 277                 }
 278         }
 279
 280         return 0;
 281 }
 282
 283 static int
 284 pdump_register_tx_callbacks(uint16_t end_q, uint16_t port, uint16_t queue,
 285                                 struct rte_ring *ring, struct rte_mempool *mp,
 286                                 uint16_t operation)
 287 {
 288
 289         uint16_t qid;
 290         struct pdump_rxtx_cbs *cbs = NULL;
 291
 292         qid = (queue == RTE_PDUMP_ALL_QUEUES) ? 0 : queue;
 293         for (; qid < end_q; qid++) {
 294                 cbs = &tx_cbs[port][qid];
 295                 if (cbs && operation == ENABLE) {
 296                         if (cbs->cb) {
 297                                 RTE_LOG(ERR, PDUMP,
 298                                         "failed to add tx callback for port=%d "
 299                                         "and queue=%d, callback already exists\n",
 300                                         port, qid);
 301                                 return -EEXIST;
 302                         }
 303                         cbs->ring = ring;
 304                         cbs->mp = mp;
 305                         cbs->cb = rte_eth_add_tx_callback(port, qid, pdump_tx,
 306                                                                 cbs);
 307                         if (cbs->cb == NULL) {
 308                                 RTE_LOG(ERR, PDUMP,
 309                                         "failed to add tx callback, errno=%d\n",
 310                                         rte_errno);
 311                                 return rte_errno;
 312                         }
 313                 }
 314                 if (cbs && operation == DISABLE) {
 315                         int ret;
 316
 317                         if (cbs->cb == NULL) {
 318                                 RTE_LOG(ERR, PDUMP,
 319                                         "failed to delete non existing tx "
 320                                         "callback for port=%d and queue=%d\n",
 321                                         port, qid);
 322                                 return -EINVAL;
 323                         }
 324                         ret = rte_eth_remove_tx_callback(port, qid, cbs->cb);
 325                         if (ret < 0) {
 326                                 RTE_LOG(ERR, PDUMP,
 327                                         "failed to remove tx callback, errno=%d\n",
 328                                         -ret);
 329                                 return ret;
 330                         }
 331                         cbs->cb = NULL;
 332                 }
 333         }
 334
 335         return 0;
 336 }
 337
 338 static int
 339 set_pdump_rxtx_cbs(struct pdump_request *p)
 340 {
 341         uint16_t nb_rx_q = 0, nb_tx_q = 0, end_q, queue;
 342         uint16_t port;
 343         int ret = 0;
 344         uint32_t flags;
 345         uint16_t operation;
 346         struct rte_ring *ring;
 347         struct rte_mempool *mp;
 348
 349         flags = p->flags;
 350         operation = p->op;
 351         if (operation == ENABLE) {
 352                 ret = rte_eth_dev_get_port_by_name(p->data.en_v1.device,
 353                                 &port);
 354                 if (ret < 0) {
 355                         RTE_LOG(ERR, PDUMP,
 356                                 "failed to get port id for device id=%s\n",
 357                                 p->data.en_v1.device);
 358                         return -EINVAL;
 359                 }
 360                 queue = p->data.en_v1.queue;
 361                 ring = p->data.en_v1.ring;
 362                 mp = p->data.en_v1.mp;
 363         } else {
 364                 ret = rte_eth_dev_get_port_by_name(p->data.dis_v1.device,
 365                                 &port);
 366                 if (ret < 0) {
 367                         RTE_LOG(ERR, PDUMP,
 368                                 "failed to get port id for device id=%s\n",
 369                                 p->data.dis_v1.device);
 370                         return -EINVAL;
 371                 }
 372                 queue = p->data.dis_v1.queue;
 373                 ring = p->data.dis_v1.ring;
 374                 mp = p->data.dis_v1.mp;
 375         }
 376
 377         /* validation if packet capture is for all queues */
 378         if (queue == RTE_PDUMP_ALL_QUEUES) {
 379                 struct rte_eth_dev_info dev_info;
 380
 381                 rte_eth_dev_info_get(port, &dev_info);
 382                 nb_rx_q = dev_info.nb_rx_queues;
 383                 nb_tx_q = dev_info.nb_tx_queues;
 384                 if (nb_rx_q == 0 && flags & RTE_PDUMP_FLAG_RX) {
 385                         RTE_LOG(ERR, PDUMP,
 386                                 "number of rx queues cannot be 0\n");
 387                         return -EINVAL;
 388                 }
 389                 if (nb_tx_q == 0 && flags & RTE_PDUMP_FLAG_TX) {
 390                         RTE_LOG(ERR, PDUMP,
 391                                 "number of tx queues cannot be 0\n");
 392                         return -EINVAL;
 393                 }
 394                 if ((nb_tx_q == 0 || nb_rx_q == 0) &&
 395                         flags == RTE_PDUMP_FLAG_RXTX) {
 396                         RTE_LOG(ERR, PDUMP,
 397                                 "both tx&rx queues must be non zero\n");
 398                         return -EINVAL;
 399                 }
 400         }
 401
 402         /* register RX callback */
 403         if (flags & RTE_PDUMP_FLAG_RX) {
 404                 end_q = (queue == RTE_PDUMP_ALL_QUEUES) ? nb_rx_q : queue + 1;
 405                 ret = pdump_register_rx_callbacks(end_q, port, queue, ring, mp,
 406                                                         operation);
 407                 if (ret < 0)
 408                         return ret;
 409         }
 410
 411         /* register TX callback */
 412         if (flags & RTE_PDUMP_FLAG_TX) {
 413                 end_q = (queue == RTE_PDUMP_ALL_QUEUES) ? nb_tx_q : queue + 1;
 414                 ret = pdump_register_tx_callbacks(end_q, port, queue, ring, mp,
 415                                                         operation);
 416                 if (ret < 0)
 417                         return ret;
 418         }
 419
 420         return ret;
 421 }
 422
 423 /* get socket path (/var/run if root, $HOME otherwise) */
 424 static int
 425 pdump_get_socket_path(char *buffer, int bufsz, enum rte_pdump_socktype type)
 426 {
 427         char dpdk_dir[PATH_MAX] = {0};
 428         char dir[PATH_MAX] = {0};
 429         char *dir_home = NULL;
 430         int ret = 0;
 431
 432         if (type == RTE_PDUMP_SOCKET_SERVER && server_socket_dir[0] != 0)
 433                 snprintf(dir, sizeof(dir), "%s", server_socket_dir);
 434         else if (type == RTE_PDUMP_SOCKET_CLIENT && client_socket_dir[0] != 0)
 435                 snprintf(dir, sizeof(dir), "%s", client_socket_dir);
 436         else {
 437                 if (getuid() != 0) {
 438                         dir_home = getenv(SOCKET_PATH_HOME);
 439                         if (!dir_home) {
 440                                 RTE_LOG(ERR, PDUMP,
 441                                         "Failed to get environment variable"
 442                                         " value for %s, %s:%d\n",
 443                                         SOCKET_PATH_HOME, __func__, __LINE__);
 444                                 return -1;
 445                         }
 446                         snprintf(dpdk_dir, sizeof(dpdk_dir), "%s%s",
 447                                         dir_home, DPDK_DIR);
 448                 } else
 449                         snprintf(dpdk_dir, sizeof(dpdk_dir), "%s%s",
 450                                         SOCKET_PATH_VAR_RUN, DPDK_DIR);
 451
 452                 mkdir(dpdk_dir, 0700);
 453                 snprintf(dir, sizeof(dir), "%s%s",
 454                                         dpdk_dir, SOCKET_DIR);
 455         }
 456
 457         ret =  mkdir(dir, 0700);
 458         /* if user passed socket path is invalid, return immediately */
 459         if (ret < 0 && errno != EEXIST) {
 460                 RTE_LOG(ERR, PDUMP,
 461                         "Failed to create dir:%s:%s\n", dir,
 462                         strerror(errno));
 463                 rte_errno = errno;
 464                 return -1;
 465         }
 466
 467         if (type == RTE_PDUMP_SOCKET_SERVER)
 468                 snprintf(buffer, bufsz, SERVER_SOCKET, dir);
 469         else
 470                 snprintf(buffer, bufsz, CLIENT_SOCKET, dir, getpid(),
 471                                 rte_sys_gettid());
 472
 473         return 0;
 474 }
 475
 476 static int
 477 pdump_create_server_socket(void)
 478 {
 479         int ret, socket_fd;
 480         struct sockaddr_un addr;
 481         socklen_t addr_len;
 482
 483         ret = pdump_get_socket_path(addr.sun_path, sizeof(addr.sun_path),
 484                                 RTE_PDUMP_SOCKET_SERVER);
 485         if (ret != 0) {
 486                 RTE_LOG(ERR, PDUMP,
 487                         "Failed to get server socket path: %s:%d\n",
 488                         __func__, __LINE__);
 489                 return -1;
 490         }
 491         addr.sun_family = AF_UNIX;
 492
 493         /* remove if file already exists */
 494         unlink(addr.sun_path);
 495
 496         /* set up a server socket */
 497         socket_fd = socket(AF_UNIX, SOCK_DGRAM, 0);
 498         if (socket_fd < 0) {
 499                 RTE_LOG(ERR, PDUMP,
 500                         "Failed to create server socket: %s, %s:%d\n",
 501                         strerror(errno), __func__, __LINE__);
 502                 return -1;
 503         }
 504
 505         addr_len = sizeof(struct sockaddr_un);
 506         ret = bind(socket_fd, (struct sockaddr *) &addr, addr_len);
 507         if (ret) {
 508                 RTE_LOG(ERR, PDUMP,
 509                         "Failed to bind to server socket: %s, %s:%d\n",
 510                         strerror(errno), __func__, __LINE__);
 511                 close(socket_fd);
 512                 return -1;
 513         }
 514
 515         /* save the socket in local configuration */
 516         pdump_socket_fd = socket_fd;
 517
 518         return 0;
 519 }
 520
 521 static __attribute__((noreturn)) void *
 522 pdump_thread_main(__rte_unused void *arg)
 523 {
 524         struct sockaddr_un cli_addr;
 525         socklen_t cli_len;
 526         struct pdump_request cli_req;
 527         struct pdump_response resp;
 528         int n;
 529         int ret = 0;
 530
 531         /* host thread, never break out */
 532         for (;;) {
 533                 /* recv client requests */
 534                 cli_len = sizeof(cli_addr);
 535                 n = recvfrom(pdump_socket_fd, &cli_req,
 536                                 sizeof(struct pdump_request), 0,
 537                                 (struct sockaddr *)&cli_addr, &cli_len);
 538                 if (n < 0) {
 539                         RTE_LOG(ERR, PDUMP,
 540                                 "failed to recv from client:%s, %s:%d\n",
 541                                 strerror(errno), __func__, __LINE__);
 542                         continue;
 543                 }
 544
 545                 ret = set_pdump_rxtx_cbs(&cli_req);
 546
 547                 resp.ver = cli_req.ver;
 548                 resp.res_op = cli_req.op;
 549                 resp.err_value = ret;
 550                 n = sendto(pdump_socket_fd, &resp,
 551                                 sizeof(struct pdump_response),
 552                                 0, (struct sockaddr *)&cli_addr, cli_len);
 553                 if (n < 0) {
 554                         RTE_LOG(ERR, PDUMP,
 555                                 "failed to send to client:%s, %s:%d\n",
 556                                 strerror(errno), __func__, __LINE__);
 557                 }
 558         }
 559 }
 560
 561 int
 562 rte_pdump_init(const char *path)
 563 {
 564         int ret = 0;
 565         char thread_name[RTE_MAX_THREAD_NAME_LEN];
 566
 567         ret = rte_pdump_set_socket_dir(path, RTE_PDUMP_SOCKET_SERVER);
 568         if (ret != 0)
 569                 return -1;
 570
 571         ret = pdump_create_server_socket();
 572         if (ret != 0) {
 573                 RTE_LOG(ERR, PDUMP,
 574                         "Failed to create server socket:%s:%d\n",
 575                         __func__, __LINE__);
 576                 return -1;
 577         }
 578
 579         /* create the host thread to wait/handle pdump requests */
 580         snprintf(thread_name, sizeof(thread_name), "pdump-thread");
 581         ret = rte_ctrl_thread_create(&pdump_thread, thread_name, NULL,
 582                                 pdump_thread_main, NULL);
 583         if (ret != 0) {
 584                 RTE_LOG(ERR, PDUMP,
 585                         "Failed to create the pdump thread:%s, %s:%d\n",
 586                         strerror(-ret), __func__, __LINE__);
 587                 return -1;
 588         }
 589
 590         return 0;
 591 }
 592
 593 int
 594 rte_pdump_uninit(void)
 595 {
 596         int ret;
 597
 598         ret = pthread_cancel(pdump_thread);
 599         if (ret != 0) {
 600                 RTE_LOG(ERR, PDUMP,
 601                         "Failed to cancel the pdump thread:%s, %s:%d\n",
 602                         strerror(ret), __func__, __LINE__);
 603                 return -1;
 604         }
 605
 606         ret = close(pdump_socket_fd);
 607         if (ret != 0) {
 608                 RTE_LOG(ERR, PDUMP,
 609                         "Failed to close server socket: %s, %s:%d\n",
 610                         strerror(errno), __func__, __LINE__);
 611                 return -1;
 612         }
 613
 614         struct sockaddr_un addr;
 615
 616         ret = pdump_get_socket_path(addr.sun_path, sizeof(addr.sun_path),
 617                                 RTE_PDUMP_SOCKET_SERVER);
 618         if (ret != 0) {
 619                 RTE_LOG(ERR, PDUMP,
 620                         "Failed to get server socket path: %s:%d\n",
 621                         __func__, __LINE__);
 622                 return -1;
 623         }
 624         ret = unlink(addr.sun_path);
 625         if (ret != 0) {
 626                 RTE_LOG(ERR, PDUMP,
 627                         "Failed to remove server socket addr: %s, %s:%d\n",
 628                         strerror(errno), __func__, __LINE__);
 629                 return -1;
 630         }
 631
 632         return 0;
 633 }
 634
 635 static int
 636 pdump_create_client_socket(struct pdump_request *p)
 637 {
 638         int ret, socket_fd;
 639         int pid;
 640         int n;
 641         struct pdump_response server_resp;
 642         struct sockaddr_un addr, serv_addr, from;
 643         socklen_t addr_len, serv_len;
 644
 645         pid = getpid();
 646
 647         socket_fd = socket(AF_UNIX, SOCK_DGRAM, 0);
 648         if (socket_fd < 0) {
 649                 RTE_LOG(ERR, PDUMP,
 650                         "client socket(): %s:pid(%d):tid(%u), %s:%d\n",
 651                         strerror(errno), pid, rte_sys_gettid(),
 652                         __func__, __LINE__);
 653                 rte_errno = errno;
 654                 return -1;
 655         }
 656
 657         ret = pdump_get_socket_path(addr.sun_path, sizeof(addr.sun_path),
 658                                 RTE_PDUMP_SOCKET_CLIENT);
 659         if (ret != 0) {
 660                 RTE_LOG(ERR, PDUMP,
 661                         "Failed to get client socket path: %s:%d\n",
 662                         __func__, __LINE__);
 663                 rte_errno = errno;
 664                 goto exit;
 665         }
 666         addr.sun_family = AF_UNIX;
 667         addr_len = sizeof(struct sockaddr_un);
 668
 669         do {
 670                 ret = bind(socket_fd, (struct sockaddr *) &addr, addr_len);
 671                 if (ret) {
 672                         RTE_LOG(ERR, PDUMP,
 673                                 "client bind(): %s, %s:%d\n",
 674                                 strerror(errno), __func__, __LINE__);
 675                         rte_errno = errno;
 676                         break;
 677                 }
 678
 679                 serv_len = sizeof(struct sockaddr_un);
 680                 memset(&serv_addr, 0, sizeof(serv_addr));
 681                 ret = pdump_get_socket_path(serv_addr.sun_path,
 682                                         sizeof(serv_addr.sun_path),
 683                                         RTE_PDUMP_SOCKET_SERVER);
 684                 if (ret != 0) {
 685                         RTE_LOG(ERR, PDUMP,
 686                                 "Failed to get server socket path: %s:%d\n",
 687                                 __func__, __LINE__);
 688                         rte_errno = errno;
 689                         break;
 690                 }
 691                 serv_addr.sun_family = AF_UNIX;
 692
 693                 n =  sendto(socket_fd, p, sizeof(struct pdump_request), 0,
 694                                 (struct sockaddr *)&serv_addr, serv_len);
 695                 if (n < 0) {
 696                         RTE_LOG(ERR, PDUMP,
 697                                 "failed to send to server:%s, %s:%d\n",
 698                                 strerror(errno), __func__, __LINE__);
 699                         rte_errno = errno;
 700                         ret = -1;
 701                         break;
 702                 }
 703
 704                 n = recvfrom(socket_fd, &server_resp,
 705                                 sizeof(struct pdump_response), 0,
 706                                 (struct sockaddr *)&from, &serv_len);
 707                 if (n < 0) {
 708                         RTE_LOG(ERR, PDUMP,
 709                                 "failed to recv from server:%s, %s:%d\n",
 710                                 strerror(errno), __func__, __LINE__);
 711                         rte_errno = errno;
 712                         ret = -1;
 713                         break;
 714                 }
 715                 ret = server_resp.err_value;
 716         } while (0);
 717
 718 exit:
 719         close(socket_fd);
 720         unlink(addr.sun_path);
 721         return ret;
 722 }
 723
 724 static int
 725 pdump_validate_ring_mp(struct rte_ring *ring, struct rte_mempool *mp)
 726 {
 727         if (ring == NULL || mp == NULL) {
 728                 RTE_LOG(ERR, PDUMP, "NULL ring or mempool are passed %s:%d\n",
 729                         __func__, __LINE__);
 730                 rte_errno = EINVAL;
 731                 return -1;
 732         }
 733         if (mp->flags & MEMPOOL_F_SP_PUT || mp->flags & MEMPOOL_F_SC_GET) {
 734                 RTE_LOG(ERR, PDUMP, "mempool with either SP or SC settings"
 735                 " is not valid for pdump, should have MP and MC settings\n");
 736                 rte_errno = EINVAL;
 737                 return -1;
 738         }
 739         if (ring->prod.single || ring->cons.single) {
 740                 RTE_LOG(ERR, PDUMP, "ring with either SP or SC settings"
 741                 " is not valid for pdump, should have MP and MC settings\n");
 742                 rte_errno = EINVAL;
 743                 return -1;
 744         }
 745
 746         return 0;
 747 }
 748
 749 static int
 750 pdump_validate_flags(uint32_t flags)
 751 {
 752         if (flags != RTE_PDUMP_FLAG_RX && flags != RTE_PDUMP_FLAG_TX &&
 753                 flags != RTE_PDUMP_FLAG_RXTX) {
 754                 RTE_LOG(ERR, PDUMP,
 755                         "invalid flags, should be either rx/tx/rxtx\n");
 756                 rte_errno = EINVAL;
 757                 return -1;
 758         }
 759
 760         return 0;
 761 }
 762
 763 static int
 764 pdump_validate_port(uint16_t port, char *name)
 765 {
 766         int ret = 0;
 767
 768         if (port >= RTE_MAX_ETHPORTS) {
 769                 RTE_LOG(ERR, PDUMP, "Invalid port id %u, %s:%d\n", port,
 770                         __func__, __LINE__);
 771                 rte_errno = EINVAL;
 772                 return -1;
 773         }
 774
 775         ret = rte_eth_dev_get_name_by_port(port, name);
 776         if (ret < 0) {
 777                 RTE_LOG(ERR, PDUMP,
 778                         "port id to name mapping failed for port id=%u, %s:%d\n",
 779                         port, __func__, __LINE__);
 780                 rte_errno = EINVAL;
 781                 return -1;
 782         }
 783
 784         return 0;
 785 }
 786
 787 static int
 788 pdump_prepare_client_request(char *device, uint16_t queue,
 789                                 uint32_t flags,
 790                                 uint16_t operation,
 791                                 struct rte_ring *ring,
 792                                 struct rte_mempool *mp,
 793                                 void *filter)
 794 {
 795         int ret;
 796         struct pdump_request req = {.ver = 1,};
 797
 798         req.flags = flags;
 799         req.op =  operation;
 800         if ((operation & ENABLE) != 0) {
 801                 snprintf(req.data.en_v1.device, sizeof(req.data.en_v1.device),
 802                                 "%s", device);
 803                 req.data.en_v1.queue = queue;
 804                 req.data.en_v1.ring = ring;
 805                 req.data.en_v1.mp = mp;
 806                 req.data.en_v1.filter = filter;
 807         } else {
 808                 snprintf(req.data.dis_v1.device, sizeof(req.data.dis_v1.device),
 809                                 "%s", device);
 810                 req.data.dis_v1.queue = queue;
 811                 req.data.dis_v1.ring = NULL;
 812                 req.data.dis_v1.mp = NULL;
 813                 req.data.dis_v1.filter = NULL;
 814         }
 815
 816         ret = pdump_create_client_socket(&req);
 817         if (ret < 0) {
 818                 RTE_LOG(ERR, PDUMP,
 819                         "client request for pdump enable/disable failed\n");
 820                 rte_errno = ret;
 821                 return -1;
 822         }
 823
 824         return 0;
 825 }
 826
 827 int
 828 rte_pdump_enable(uint16_t port, uint16_t queue, uint32_t flags,
 829                         struct rte_ring *ring,
 830                         struct rte_mempool *mp,
 831                         void *filter)
 832 {
 833
 834         int ret = 0;
 835         char name[DEVICE_ID_SIZE];
 836
 837         ret = pdump_validate_port(port, name);
 838         if (ret < 0)
 839                 return ret;
 840         ret = pdump_validate_ring_mp(ring, mp);
 841         if (ret < 0)
 842                 return ret;
 843         ret = pdump_validate_flags(flags);
 844         if (ret < 0)
 845                 return ret;
 846
 847         ret = pdump_prepare_client_request(name, queue, flags,
 848                                                 ENABLE, ring, mp, filter);
 849
 850         return ret;
 851 }
 852
 853 int
 854 rte_pdump_enable_by_deviceid(char *device_id, uint16_t queue,
 855                                 uint32_t flags,
 856                                 struct rte_ring *ring,
 857                                 struct rte_mempool *mp,
 858                                 void *filter)
 859 {
 860         int ret = 0;
 861
 862         ret = pdump_validate_ring_mp(ring, mp);
 863         if (ret < 0)
 864                 return ret;
 865         ret = pdump_validate_flags(flags);
 866         if (ret < 0)
 867                 return ret;
 868
 869         ret = pdump_prepare_client_request(device_id, queue, flags,
 870                                                 ENABLE, ring, mp, filter);
 871
 872         return ret;
 873 }
 874
 875 int
 876 rte_pdump_disable(uint16_t port, uint16_t queue, uint32_t flags)
 877 {
 878         int ret = 0;
 879         char name[DEVICE_ID_SIZE];
 880
 881         ret = pdump_validate_port(port, name);
 882         if (ret < 0)
 883                 return ret;
 884         ret = pdump_validate_flags(flags);
 885         if (ret < 0)
 886                 return ret;
 887
 888         ret = pdump_prepare_client_request(name, queue, flags,
 889                                                 DISABLE, NULL, NULL, NULL);
 890
 891         return ret;
 892 }
 893
 894 int
 895 rte_pdump_disable_by_deviceid(char *device_id, uint16_t queue,
 896                                 uint32_t flags)
 897 {
 898         int ret = 0;
 899
 900         ret = pdump_validate_flags(flags);
 901         if (ret < 0)
 902                 return ret;
 903
 904         ret = pdump_prepare_client_request(device_id, queue, flags,
 905                                                 DISABLE, NULL, NULL, NULL);
 906
 907         return ret;
 908 }
 909
 910 int
 911 rte_pdump_set_socket_dir(const char *path, enum rte_pdump_socktype type)
 912 {
 913         int ret, count;
 914
 915         if (path != NULL) {
 916                 if (type == RTE_PDUMP_SOCKET_SERVER) {
 917                         count = sizeof(server_socket_dir);
 918                         ret = snprintf(server_socket_dir, count, "%s", path);
 919                 } else {
 920                         count = sizeof(client_socket_dir);
 921                         ret = snprintf(client_socket_dir, count, "%s", path);
 922                 }
 923
 924                 if (ret < 0  || ret >= count) {
 925                         RTE_LOG(ERR, PDUMP,
 926                                         "Invalid socket path:%s:%d\n",
 927                                         __func__, __LINE__);
 928                         if (type == RTE_PDUMP_SOCKET_SERVER)
 929                                 server_socket_dir[0] = 0;
 930                         else
 931                                 client_socket_dir[0] = 0;
 932                         return -EINVAL;
 933                 }
 934         }
 935
 936         return 0;
 937 }