Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1 | /* |
| 2 | * GPL HEADER START |
| 3 | * |
| 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 only, |
| 8 | * as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License version 2 for more details (a copy is included |
| 14 | * in the LICENSE file that accompanied this code). |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * version 2 along with this program; If not, see |
| 18 | * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf |
| 19 | * |
| 20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 21 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 22 | * have any questions. |
| 23 | * |
| 24 | * GPL HEADER END |
| 25 | */ |
| 26 | /* |
| 27 | * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. |
| 28 | * Use is subject to license terms. |
| 29 | * |
| 30 | * Copyright (c) 2012, Intel Corporation. |
| 31 | */ |
| 32 | /* |
| 33 | * This file is part of Lustre, http://www.lustre.org/ |
| 34 | * Lustre is a trademark of Sun Microsystems, Inc. |
| 35 | * |
| 36 | * lnet/klnds/o2iblnd/o2iblnd_cb.c |
| 37 | * |
| 38 | * Author: Eric Barton <eric@bartonsoftware.com> |
| 39 | */ |
| 40 | |
| 41 | #include "o2iblnd.h" |
| 42 | |
| 43 | void |
| 44 | kiblnd_tx_done (lnet_ni_t *ni, kib_tx_t *tx) |
| 45 | { |
| 46 | lnet_msg_t *lntmsg[2]; |
| 47 | kib_net_t *net = ni->ni_data; |
| 48 | int rc; |
| 49 | int i; |
| 50 | |
| 51 | LASSERT (net != NULL); |
| 52 | LASSERT (!in_interrupt()); |
| 53 | LASSERT (!tx->tx_queued); /* mustn't be queued for sending */ |
| 54 | LASSERT (tx->tx_sending == 0); /* mustn't be awaiting sent callback */ |
| 55 | LASSERT (!tx->tx_waiting); /* mustn't be awaiting peer response */ |
| 56 | LASSERT (tx->tx_pool != NULL); |
| 57 | |
| 58 | kiblnd_unmap_tx(ni, tx); |
| 59 | |
| 60 | /* tx may have up to 2 lnet msgs to finalise */ |
| 61 | lntmsg[0] = tx->tx_lntmsg[0]; tx->tx_lntmsg[0] = NULL; |
| 62 | lntmsg[1] = tx->tx_lntmsg[1]; tx->tx_lntmsg[1] = NULL; |
| 63 | rc = tx->tx_status; |
| 64 | |
| 65 | if (tx->tx_conn != NULL) { |
| 66 | LASSERT (ni == tx->tx_conn->ibc_peer->ibp_ni); |
| 67 | |
| 68 | kiblnd_conn_decref(tx->tx_conn); |
| 69 | tx->tx_conn = NULL; |
| 70 | } |
| 71 | |
| 72 | tx->tx_nwrq = 0; |
| 73 | tx->tx_status = 0; |
| 74 | |
| 75 | kiblnd_pool_free_node(&tx->tx_pool->tpo_pool, &tx->tx_list); |
| 76 | |
| 77 | /* delay finalize until my descs have been freed */ |
| 78 | for (i = 0; i < 2; i++) { |
| 79 | if (lntmsg[i] == NULL) |
| 80 | continue; |
| 81 | |
| 82 | lnet_finalize(ni, lntmsg[i], rc); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | void |
| 87 | kiblnd_txlist_done (lnet_ni_t *ni, struct list_head *txlist, int status) |
| 88 | { |
| 89 | kib_tx_t *tx; |
| 90 | |
| 91 | while (!list_empty (txlist)) { |
| 92 | tx = list_entry (txlist->next, kib_tx_t, tx_list); |
| 93 | |
| 94 | list_del(&tx->tx_list); |
| 95 | /* complete now */ |
| 96 | tx->tx_waiting = 0; |
| 97 | tx->tx_status = status; |
| 98 | kiblnd_tx_done(ni, tx); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | kib_tx_t * |
| 103 | kiblnd_get_idle_tx(lnet_ni_t *ni, lnet_nid_t target) |
| 104 | { |
| 105 | kib_net_t *net = (kib_net_t *)ni->ni_data; |
| 106 | struct list_head *node; |
| 107 | kib_tx_t *tx; |
| 108 | kib_tx_poolset_t *tps; |
| 109 | |
| 110 | tps = net->ibn_tx_ps[lnet_cpt_of_nid(target)]; |
| 111 | node = kiblnd_pool_alloc_node(&tps->tps_poolset); |
| 112 | if (node == NULL) |
| 113 | return NULL; |
| 114 | tx = container_of(node, kib_tx_t, tx_list); |
| 115 | |
| 116 | LASSERT (tx->tx_nwrq == 0); |
| 117 | LASSERT (!tx->tx_queued); |
| 118 | LASSERT (tx->tx_sending == 0); |
| 119 | LASSERT (!tx->tx_waiting); |
| 120 | LASSERT (tx->tx_status == 0); |
| 121 | LASSERT (tx->tx_conn == NULL); |
| 122 | LASSERT (tx->tx_lntmsg[0] == NULL); |
| 123 | LASSERT (tx->tx_lntmsg[1] == NULL); |
| 124 | LASSERT (tx->tx_u.pmr == NULL); |
| 125 | LASSERT (tx->tx_nfrags == 0); |
| 126 | |
| 127 | return tx; |
| 128 | } |
| 129 | |
| 130 | void |
| 131 | kiblnd_drop_rx(kib_rx_t *rx) |
| 132 | { |
| 133 | kib_conn_t *conn = rx->rx_conn; |
| 134 | struct kib_sched_info *sched = conn->ibc_sched; |
| 135 | unsigned long flags; |
| 136 | |
| 137 | spin_lock_irqsave(&sched->ibs_lock, flags); |
| 138 | LASSERT(conn->ibc_nrx > 0); |
| 139 | conn->ibc_nrx--; |
| 140 | spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| 141 | |
| 142 | kiblnd_conn_decref(conn); |
| 143 | } |
| 144 | |
| 145 | int |
| 146 | kiblnd_post_rx (kib_rx_t *rx, int credit) |
| 147 | { |
| 148 | kib_conn_t *conn = rx->rx_conn; |
| 149 | kib_net_t *net = conn->ibc_peer->ibp_ni->ni_data; |
| 150 | struct ib_recv_wr *bad_wrq = NULL; |
| 151 | struct ib_mr *mr; |
| 152 | int rc; |
| 153 | |
| 154 | LASSERT (net != NULL); |
| 155 | LASSERT (!in_interrupt()); |
| 156 | LASSERT (credit == IBLND_POSTRX_NO_CREDIT || |
| 157 | credit == IBLND_POSTRX_PEER_CREDIT || |
| 158 | credit == IBLND_POSTRX_RSRVD_CREDIT); |
| 159 | |
| 160 | mr = kiblnd_find_dma_mr(conn->ibc_hdev, rx->rx_msgaddr, IBLND_MSG_SIZE); |
| 161 | LASSERT (mr != NULL); |
| 162 | |
| 163 | rx->rx_sge.lkey = mr->lkey; |
| 164 | rx->rx_sge.addr = rx->rx_msgaddr; |
| 165 | rx->rx_sge.length = IBLND_MSG_SIZE; |
| 166 | |
| 167 | rx->rx_wrq.next = NULL; |
| 168 | rx->rx_wrq.sg_list = &rx->rx_sge; |
| 169 | rx->rx_wrq.num_sge = 1; |
| 170 | rx->rx_wrq.wr_id = kiblnd_ptr2wreqid(rx, IBLND_WID_RX); |
| 171 | |
| 172 | LASSERT (conn->ibc_state >= IBLND_CONN_INIT); |
| 173 | LASSERT (rx->rx_nob >= 0); /* not posted */ |
| 174 | |
| 175 | if (conn->ibc_state > IBLND_CONN_ESTABLISHED) { |
| 176 | kiblnd_drop_rx(rx); /* No more posts for this rx */ |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | rx->rx_nob = -1; /* flag posted */ |
| 181 | |
| 182 | rc = ib_post_recv(conn->ibc_cmid->qp, &rx->rx_wrq, &bad_wrq); |
| 183 | if (rc != 0) { |
| 184 | CERROR("Can't post rx for %s: %d, bad_wrq: %p\n", |
| 185 | libcfs_nid2str(conn->ibc_peer->ibp_nid), rc, bad_wrq); |
| 186 | rx->rx_nob = 0; |
| 187 | } |
| 188 | |
| 189 | if (conn->ibc_state < IBLND_CONN_ESTABLISHED) /* Initial post */ |
| 190 | return rc; |
| 191 | |
| 192 | if (rc != 0) { |
| 193 | kiblnd_close_conn(conn, rc); |
| 194 | kiblnd_drop_rx(rx); /* No more posts for this rx */ |
| 195 | return rc; |
| 196 | } |
| 197 | |
| 198 | if (credit == IBLND_POSTRX_NO_CREDIT) |
| 199 | return 0; |
| 200 | |
| 201 | spin_lock(&conn->ibc_lock); |
| 202 | if (credit == IBLND_POSTRX_PEER_CREDIT) |
| 203 | conn->ibc_outstanding_credits++; |
| 204 | else |
| 205 | conn->ibc_reserved_credits++; |
| 206 | spin_unlock(&conn->ibc_lock); |
| 207 | |
| 208 | kiblnd_check_sends(conn); |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | kib_tx_t * |
| 213 | kiblnd_find_waiting_tx_locked(kib_conn_t *conn, int txtype, __u64 cookie) |
| 214 | { |
| 215 | struct list_head *tmp; |
| 216 | |
| 217 | list_for_each(tmp, &conn->ibc_active_txs) { |
| 218 | kib_tx_t *tx = list_entry(tmp, kib_tx_t, tx_list); |
| 219 | |
| 220 | LASSERT (!tx->tx_queued); |
| 221 | LASSERT (tx->tx_sending != 0 || tx->tx_waiting); |
| 222 | |
| 223 | if (tx->tx_cookie != cookie) |
| 224 | continue; |
| 225 | |
| 226 | if (tx->tx_waiting && |
| 227 | tx->tx_msg->ibm_type == txtype) |
| 228 | return tx; |
| 229 | |
| 230 | CWARN("Bad completion: %swaiting, type %x (wanted %x)\n", |
| 231 | tx->tx_waiting ? "" : "NOT ", |
| 232 | tx->tx_msg->ibm_type, txtype); |
| 233 | } |
| 234 | return NULL; |
| 235 | } |
| 236 | |
| 237 | void |
| 238 | kiblnd_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie) |
| 239 | { |
| 240 | kib_tx_t *tx; |
| 241 | lnet_ni_t *ni = conn->ibc_peer->ibp_ni; |
| 242 | int idle; |
| 243 | |
| 244 | spin_lock(&conn->ibc_lock); |
| 245 | |
| 246 | tx = kiblnd_find_waiting_tx_locked(conn, txtype, cookie); |
| 247 | if (tx == NULL) { |
| 248 | spin_unlock(&conn->ibc_lock); |
| 249 | |
| 250 | CWARN("Unmatched completion type %x cookie "LPX64" from %s\n", |
| 251 | txtype, cookie, libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 252 | kiblnd_close_conn(conn, -EPROTO); |
| 253 | return; |
| 254 | } |
| 255 | |
| 256 | if (tx->tx_status == 0) { /* success so far */ |
| 257 | if (status < 0) { /* failed? */ |
| 258 | tx->tx_status = status; |
| 259 | } else if (txtype == IBLND_MSG_GET_REQ) { |
| 260 | lnet_set_reply_msg_len(ni, tx->tx_lntmsg[1], status); |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | tx->tx_waiting = 0; |
| 265 | |
| 266 | idle = !tx->tx_queued && (tx->tx_sending == 0); |
| 267 | if (idle) |
| 268 | list_del(&tx->tx_list); |
| 269 | |
| 270 | spin_unlock(&conn->ibc_lock); |
| 271 | |
| 272 | if (idle) |
| 273 | kiblnd_tx_done(ni, tx); |
| 274 | } |
| 275 | |
| 276 | void |
| 277 | kiblnd_send_completion(kib_conn_t *conn, int type, int status, __u64 cookie) |
| 278 | { |
| 279 | lnet_ni_t *ni = conn->ibc_peer->ibp_ni; |
| 280 | kib_tx_t *tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); |
| 281 | |
| 282 | if (tx == NULL) { |
| 283 | CERROR("Can't get tx for completion %x for %s\n", |
| 284 | type, libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 285 | return; |
| 286 | } |
| 287 | |
| 288 | tx->tx_msg->ibm_u.completion.ibcm_status = status; |
| 289 | tx->tx_msg->ibm_u.completion.ibcm_cookie = cookie; |
| 290 | kiblnd_init_tx_msg(ni, tx, type, sizeof(kib_completion_msg_t)); |
| 291 | |
| 292 | kiblnd_queue_tx(tx, conn); |
| 293 | } |
| 294 | |
| 295 | void |
| 296 | kiblnd_handle_rx (kib_rx_t *rx) |
| 297 | { |
| 298 | kib_msg_t *msg = rx->rx_msg; |
| 299 | kib_conn_t *conn = rx->rx_conn; |
| 300 | lnet_ni_t *ni = conn->ibc_peer->ibp_ni; |
| 301 | int credits = msg->ibm_credits; |
| 302 | kib_tx_t *tx; |
| 303 | int rc = 0; |
| 304 | int rc2; |
| 305 | int post_credit; |
| 306 | |
| 307 | LASSERT (conn->ibc_state >= IBLND_CONN_ESTABLISHED); |
| 308 | |
| 309 | CDEBUG (D_NET, "Received %x[%d] from %s\n", |
| 310 | msg->ibm_type, credits, |
| 311 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 312 | |
| 313 | if (credits != 0) { |
| 314 | /* Have I received credits that will let me send? */ |
| 315 | spin_lock(&conn->ibc_lock); |
| 316 | |
| 317 | if (conn->ibc_credits + credits > |
| 318 | IBLND_MSG_QUEUE_SIZE(conn->ibc_version)) { |
| 319 | rc2 = conn->ibc_credits; |
| 320 | spin_unlock(&conn->ibc_lock); |
| 321 | |
| 322 | CERROR("Bad credits from %s: %d + %d > %d\n", |
| 323 | libcfs_nid2str(conn->ibc_peer->ibp_nid), |
| 324 | rc2, credits, |
| 325 | IBLND_MSG_QUEUE_SIZE(conn->ibc_version)); |
| 326 | |
| 327 | kiblnd_close_conn(conn, -EPROTO); |
| 328 | kiblnd_post_rx(rx, IBLND_POSTRX_NO_CREDIT); |
| 329 | return; |
| 330 | } |
| 331 | |
| 332 | conn->ibc_credits += credits; |
| 333 | |
| 334 | /* This ensures the credit taken by NOOP can be returned */ |
| 335 | if (msg->ibm_type == IBLND_MSG_NOOP && |
| 336 | !IBLND_OOB_CAPABLE(conn->ibc_version)) /* v1 only */ |
| 337 | conn->ibc_outstanding_credits++; |
| 338 | |
| 339 | spin_unlock(&conn->ibc_lock); |
| 340 | kiblnd_check_sends(conn); |
| 341 | } |
| 342 | |
| 343 | switch (msg->ibm_type) { |
| 344 | default: |
| 345 | CERROR("Bad IBLND message type %x from %s\n", |
| 346 | msg->ibm_type, libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 347 | post_credit = IBLND_POSTRX_NO_CREDIT; |
| 348 | rc = -EPROTO; |
| 349 | break; |
| 350 | |
| 351 | case IBLND_MSG_NOOP: |
| 352 | if (IBLND_OOB_CAPABLE(conn->ibc_version)) { |
| 353 | post_credit = IBLND_POSTRX_NO_CREDIT; |
| 354 | break; |
| 355 | } |
| 356 | |
| 357 | if (credits != 0) /* credit already posted */ |
| 358 | post_credit = IBLND_POSTRX_NO_CREDIT; |
| 359 | else /* a keepalive NOOP */ |
| 360 | post_credit = IBLND_POSTRX_PEER_CREDIT; |
| 361 | break; |
| 362 | |
| 363 | case IBLND_MSG_IMMEDIATE: |
| 364 | post_credit = IBLND_POSTRX_DONT_POST; |
| 365 | rc = lnet_parse(ni, &msg->ibm_u.immediate.ibim_hdr, |
| 366 | msg->ibm_srcnid, rx, 0); |
| 367 | if (rc < 0) /* repost on error */ |
| 368 | post_credit = IBLND_POSTRX_PEER_CREDIT; |
| 369 | break; |
| 370 | |
| 371 | case IBLND_MSG_PUT_REQ: |
| 372 | post_credit = IBLND_POSTRX_DONT_POST; |
| 373 | rc = lnet_parse(ni, &msg->ibm_u.putreq.ibprm_hdr, |
| 374 | msg->ibm_srcnid, rx, 1); |
| 375 | if (rc < 0) /* repost on error */ |
| 376 | post_credit = IBLND_POSTRX_PEER_CREDIT; |
| 377 | break; |
| 378 | |
| 379 | case IBLND_MSG_PUT_NAK: |
| 380 | CWARN ("PUT_NACK from %s\n", |
| 381 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 382 | post_credit = IBLND_POSTRX_RSRVD_CREDIT; |
| 383 | kiblnd_handle_completion(conn, IBLND_MSG_PUT_REQ, |
| 384 | msg->ibm_u.completion.ibcm_status, |
| 385 | msg->ibm_u.completion.ibcm_cookie); |
| 386 | break; |
| 387 | |
| 388 | case IBLND_MSG_PUT_ACK: |
| 389 | post_credit = IBLND_POSTRX_RSRVD_CREDIT; |
| 390 | |
| 391 | spin_lock(&conn->ibc_lock); |
| 392 | tx = kiblnd_find_waiting_tx_locked(conn, IBLND_MSG_PUT_REQ, |
| 393 | msg->ibm_u.putack.ibpam_src_cookie); |
| 394 | if (tx != NULL) |
| 395 | list_del(&tx->tx_list); |
| 396 | spin_unlock(&conn->ibc_lock); |
| 397 | |
| 398 | if (tx == NULL) { |
| 399 | CERROR("Unmatched PUT_ACK from %s\n", |
| 400 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 401 | rc = -EPROTO; |
| 402 | break; |
| 403 | } |
| 404 | |
| 405 | LASSERT (tx->tx_waiting); |
| 406 | /* CAVEAT EMPTOR: I could be racing with tx_complete, but... |
| 407 | * (a) I can overwrite tx_msg since my peer has received it! |
| 408 | * (b) tx_waiting set tells tx_complete() it's not done. */ |
| 409 | |
| 410 | tx->tx_nwrq = 0; /* overwrite PUT_REQ */ |
| 411 | |
| 412 | rc2 = kiblnd_init_rdma(conn, tx, IBLND_MSG_PUT_DONE, |
| 413 | kiblnd_rd_size(&msg->ibm_u.putack.ibpam_rd), |
| 414 | &msg->ibm_u.putack.ibpam_rd, |
| 415 | msg->ibm_u.putack.ibpam_dst_cookie); |
| 416 | if (rc2 < 0) |
| 417 | CERROR("Can't setup rdma for PUT to %s: %d\n", |
| 418 | libcfs_nid2str(conn->ibc_peer->ibp_nid), rc2); |
| 419 | |
| 420 | spin_lock(&conn->ibc_lock); |
| 421 | tx->tx_waiting = 0; /* clear waiting and queue atomically */ |
| 422 | kiblnd_queue_tx_locked(tx, conn); |
| 423 | spin_unlock(&conn->ibc_lock); |
| 424 | break; |
| 425 | |
| 426 | case IBLND_MSG_PUT_DONE: |
| 427 | post_credit = IBLND_POSTRX_PEER_CREDIT; |
| 428 | kiblnd_handle_completion(conn, IBLND_MSG_PUT_ACK, |
| 429 | msg->ibm_u.completion.ibcm_status, |
| 430 | msg->ibm_u.completion.ibcm_cookie); |
| 431 | break; |
| 432 | |
| 433 | case IBLND_MSG_GET_REQ: |
| 434 | post_credit = IBLND_POSTRX_DONT_POST; |
| 435 | rc = lnet_parse(ni, &msg->ibm_u.get.ibgm_hdr, |
| 436 | msg->ibm_srcnid, rx, 1); |
| 437 | if (rc < 0) /* repost on error */ |
| 438 | post_credit = IBLND_POSTRX_PEER_CREDIT; |
| 439 | break; |
| 440 | |
| 441 | case IBLND_MSG_GET_DONE: |
| 442 | post_credit = IBLND_POSTRX_RSRVD_CREDIT; |
| 443 | kiblnd_handle_completion(conn, IBLND_MSG_GET_REQ, |
| 444 | msg->ibm_u.completion.ibcm_status, |
| 445 | msg->ibm_u.completion.ibcm_cookie); |
| 446 | break; |
| 447 | } |
| 448 | |
| 449 | if (rc < 0) /* protocol error */ |
| 450 | kiblnd_close_conn(conn, rc); |
| 451 | |
| 452 | if (post_credit != IBLND_POSTRX_DONT_POST) |
| 453 | kiblnd_post_rx(rx, post_credit); |
| 454 | } |
| 455 | |
| 456 | void |
| 457 | kiblnd_rx_complete (kib_rx_t *rx, int status, int nob) |
| 458 | { |
| 459 | kib_msg_t *msg = rx->rx_msg; |
| 460 | kib_conn_t *conn = rx->rx_conn; |
| 461 | lnet_ni_t *ni = conn->ibc_peer->ibp_ni; |
| 462 | kib_net_t *net = ni->ni_data; |
| 463 | int rc; |
| 464 | int err = -EIO; |
| 465 | |
| 466 | LASSERT (net != NULL); |
| 467 | LASSERT (rx->rx_nob < 0); /* was posted */ |
| 468 | rx->rx_nob = 0; /* isn't now */ |
| 469 | |
| 470 | if (conn->ibc_state > IBLND_CONN_ESTABLISHED) |
| 471 | goto ignore; |
| 472 | |
| 473 | if (status != IB_WC_SUCCESS) { |
| 474 | CNETERR("Rx from %s failed: %d\n", |
| 475 | libcfs_nid2str(conn->ibc_peer->ibp_nid), status); |
| 476 | goto failed; |
| 477 | } |
| 478 | |
| 479 | LASSERT (nob >= 0); |
| 480 | rx->rx_nob = nob; |
| 481 | |
| 482 | rc = kiblnd_unpack_msg(msg, rx->rx_nob); |
| 483 | if (rc != 0) { |
| 484 | CERROR ("Error %d unpacking rx from %s\n", |
| 485 | rc, libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 486 | goto failed; |
| 487 | } |
| 488 | |
| 489 | if (msg->ibm_srcnid != conn->ibc_peer->ibp_nid || |
| 490 | msg->ibm_dstnid != ni->ni_nid || |
| 491 | msg->ibm_srcstamp != conn->ibc_incarnation || |
| 492 | msg->ibm_dststamp != net->ibn_incarnation) { |
| 493 | CERROR ("Stale rx from %s\n", |
| 494 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 495 | err = -ESTALE; |
| 496 | goto failed; |
| 497 | } |
| 498 | |
| 499 | /* set time last known alive */ |
| 500 | kiblnd_peer_alive(conn->ibc_peer); |
| 501 | |
| 502 | /* racing with connection establishment/teardown! */ |
| 503 | |
| 504 | if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { |
| 505 | rwlock_t *g_lock = &kiblnd_data.kib_global_lock; |
| 506 | unsigned long flags; |
| 507 | |
| 508 | write_lock_irqsave(g_lock, flags); |
| 509 | /* must check holding global lock to eliminate race */ |
| 510 | if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { |
| 511 | list_add_tail(&rx->rx_list, &conn->ibc_early_rxs); |
| 512 | write_unlock_irqrestore(g_lock, flags); |
| 513 | return; |
| 514 | } |
| 515 | write_unlock_irqrestore(g_lock, flags); |
| 516 | } |
| 517 | kiblnd_handle_rx(rx); |
| 518 | return; |
| 519 | |
| 520 | failed: |
| 521 | CDEBUG(D_NET, "rx %p conn %p\n", rx, conn); |
| 522 | kiblnd_close_conn(conn, err); |
| 523 | ignore: |
| 524 | kiblnd_drop_rx(rx); /* Don't re-post rx. */ |
| 525 | } |
| 526 | |
| 527 | struct page * |
| 528 | kiblnd_kvaddr_to_page (unsigned long vaddr) |
| 529 | { |
| 530 | struct page *page; |
| 531 | |
Oleg Drokin | 52481e4 | 2014-01-23 23:45:04 -0500 | [diff] [blame] | 532 | if (is_vmalloc_addr((void *)vaddr)) { |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 533 | page = vmalloc_to_page ((void *)vaddr); |
| 534 | LASSERT (page != NULL); |
| 535 | return page; |
| 536 | } |
| 537 | #ifdef CONFIG_HIGHMEM |
| 538 | if (vaddr >= PKMAP_BASE && |
| 539 | vaddr < (PKMAP_BASE + LAST_PKMAP * PAGE_SIZE)) { |
| 540 | /* No highmem pages only used for bulk (kiov) I/O */ |
| 541 | CERROR("find page for address in highmem\n"); |
| 542 | LBUG(); |
| 543 | } |
| 544 | #endif |
| 545 | page = virt_to_page (vaddr); |
| 546 | LASSERT (page != NULL); |
| 547 | return page; |
| 548 | } |
| 549 | |
| 550 | static int |
| 551 | kiblnd_fmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, int nob) |
| 552 | { |
| 553 | kib_hca_dev_t *hdev; |
| 554 | __u64 *pages = tx->tx_pages; |
| 555 | kib_fmr_poolset_t *fps; |
| 556 | int npages; |
| 557 | int size; |
| 558 | int cpt; |
| 559 | int rc; |
| 560 | int i; |
| 561 | |
| 562 | LASSERT(tx->tx_pool != NULL); |
| 563 | LASSERT(tx->tx_pool->tpo_pool.po_owner != NULL); |
| 564 | |
| 565 | hdev = tx->tx_pool->tpo_hdev; |
| 566 | |
| 567 | for (i = 0, npages = 0; i < rd->rd_nfrags; i++) { |
| 568 | for (size = 0; size < rd->rd_frags[i].rf_nob; |
| 569 | size += hdev->ibh_page_size) { |
| 570 | pages[npages ++] = (rd->rd_frags[i].rf_addr & |
| 571 | hdev->ibh_page_mask) + size; |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt; |
| 576 | |
| 577 | fps = net->ibn_fmr_ps[cpt]; |
| 578 | rc = kiblnd_fmr_pool_map(fps, pages, npages, 0, &tx->tx_u.fmr); |
| 579 | if (rc != 0) { |
| 580 | CERROR ("Can't map %d pages: %d\n", npages, rc); |
| 581 | return rc; |
| 582 | } |
| 583 | |
| 584 | /* If rd is not tx_rd, it's going to get sent to a peer, who will need |
| 585 | * the rkey */ |
| 586 | rd->rd_key = (rd != tx->tx_rd) ? tx->tx_u.fmr.fmr_pfmr->fmr->rkey : |
| 587 | tx->tx_u.fmr.fmr_pfmr->fmr->lkey; |
| 588 | rd->rd_frags[0].rf_addr &= ~hdev->ibh_page_mask; |
| 589 | rd->rd_frags[0].rf_nob = nob; |
| 590 | rd->rd_nfrags = 1; |
| 591 | |
| 592 | return 0; |
| 593 | } |
| 594 | |
| 595 | static int |
| 596 | kiblnd_pmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, int nob) |
| 597 | { |
| 598 | kib_hca_dev_t *hdev; |
| 599 | kib_pmr_poolset_t *pps; |
| 600 | __u64 iova; |
| 601 | int cpt; |
| 602 | int rc; |
| 603 | |
| 604 | LASSERT(tx->tx_pool != NULL); |
| 605 | LASSERT(tx->tx_pool->tpo_pool.po_owner != NULL); |
| 606 | |
| 607 | hdev = tx->tx_pool->tpo_hdev; |
| 608 | |
| 609 | iova = rd->rd_frags[0].rf_addr & ~hdev->ibh_page_mask; |
| 610 | |
| 611 | cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt; |
| 612 | |
| 613 | pps = net->ibn_pmr_ps[cpt]; |
| 614 | rc = kiblnd_pmr_pool_map(pps, hdev, rd, &iova, &tx->tx_u.pmr); |
| 615 | if (rc != 0) { |
| 616 | CERROR("Failed to create MR by phybuf: %d\n", rc); |
| 617 | return rc; |
| 618 | } |
| 619 | |
| 620 | /* If rd is not tx_rd, it's going to get sent to a peer, who will need |
| 621 | * the rkey */ |
| 622 | rd->rd_key = (rd != tx->tx_rd) ? tx->tx_u.pmr->pmr_mr->rkey : |
| 623 | tx->tx_u.pmr->pmr_mr->lkey; |
| 624 | rd->rd_nfrags = 1; |
| 625 | rd->rd_frags[0].rf_addr = iova; |
| 626 | rd->rd_frags[0].rf_nob = nob; |
| 627 | |
| 628 | return 0; |
| 629 | } |
| 630 | |
| 631 | void |
| 632 | kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx) |
| 633 | { |
| 634 | kib_net_t *net = ni->ni_data; |
| 635 | |
| 636 | LASSERT(net != NULL); |
| 637 | |
| 638 | if (net->ibn_fmr_ps != NULL && tx->tx_u.fmr.fmr_pfmr != NULL) { |
| 639 | kiblnd_fmr_pool_unmap(&tx->tx_u.fmr, tx->tx_status); |
| 640 | tx->tx_u.fmr.fmr_pfmr = NULL; |
| 641 | |
| 642 | } else if (net->ibn_pmr_ps != NULL && tx->tx_u.pmr != NULL) { |
| 643 | kiblnd_pmr_pool_unmap(tx->tx_u.pmr); |
| 644 | tx->tx_u.pmr = NULL; |
| 645 | } |
| 646 | |
| 647 | if (tx->tx_nfrags != 0) { |
| 648 | kiblnd_dma_unmap_sg(tx->tx_pool->tpo_hdev->ibh_ibdev, |
| 649 | tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir); |
| 650 | tx->tx_nfrags = 0; |
| 651 | } |
| 652 | } |
| 653 | |
| 654 | int |
| 655 | kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx, |
| 656 | kib_rdma_desc_t *rd, int nfrags) |
| 657 | { |
| 658 | kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev; |
| 659 | kib_net_t *net = ni->ni_data; |
| 660 | struct ib_mr *mr = NULL; |
| 661 | __u32 nob; |
| 662 | int i; |
| 663 | |
| 664 | /* If rd is not tx_rd, it's going to get sent to a peer and I'm the |
| 665 | * RDMA sink */ |
| 666 | tx->tx_dmadir = (rd != tx->tx_rd) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
| 667 | tx->tx_nfrags = nfrags; |
| 668 | |
| 669 | rd->rd_nfrags = |
| 670 | kiblnd_dma_map_sg(hdev->ibh_ibdev, |
| 671 | tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir); |
| 672 | |
| 673 | for (i = 0, nob = 0; i < rd->rd_nfrags; i++) { |
| 674 | rd->rd_frags[i].rf_nob = kiblnd_sg_dma_len( |
| 675 | hdev->ibh_ibdev, &tx->tx_frags[i]); |
| 676 | rd->rd_frags[i].rf_addr = kiblnd_sg_dma_address( |
| 677 | hdev->ibh_ibdev, &tx->tx_frags[i]); |
| 678 | nob += rd->rd_frags[i].rf_nob; |
| 679 | } |
| 680 | |
| 681 | /* looking for pre-mapping MR */ |
| 682 | mr = kiblnd_find_rd_dma_mr(hdev, rd); |
| 683 | if (mr != NULL) { |
| 684 | /* found pre-mapping MR */ |
| 685 | rd->rd_key = (rd != tx->tx_rd) ? mr->rkey : mr->lkey; |
| 686 | return 0; |
| 687 | } |
| 688 | |
| 689 | if (net->ibn_fmr_ps != NULL) |
| 690 | return kiblnd_fmr_map_tx(net, tx, rd, nob); |
| 691 | else if (net->ibn_pmr_ps != NULL) |
| 692 | return kiblnd_pmr_map_tx(net, tx, rd, nob); |
| 693 | |
| 694 | return -EINVAL; |
| 695 | } |
| 696 | |
| 697 | |
| 698 | int |
| 699 | kiblnd_setup_rd_iov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, |
| 700 | unsigned int niov, struct iovec *iov, int offset, int nob) |
| 701 | { |
| 702 | kib_net_t *net = ni->ni_data; |
| 703 | struct page *page; |
| 704 | struct scatterlist *sg; |
| 705 | unsigned long vaddr; |
| 706 | int fragnob; |
| 707 | int page_offset; |
| 708 | |
| 709 | LASSERT (nob > 0); |
| 710 | LASSERT (niov > 0); |
| 711 | LASSERT (net != NULL); |
| 712 | |
| 713 | while (offset >= iov->iov_len) { |
| 714 | offset -= iov->iov_len; |
| 715 | niov--; |
| 716 | iov++; |
| 717 | LASSERT (niov > 0); |
| 718 | } |
| 719 | |
| 720 | sg = tx->tx_frags; |
| 721 | do { |
| 722 | LASSERT (niov > 0); |
| 723 | |
| 724 | vaddr = ((unsigned long)iov->iov_base) + offset; |
| 725 | page_offset = vaddr & (PAGE_SIZE - 1); |
| 726 | page = kiblnd_kvaddr_to_page(vaddr); |
| 727 | if (page == NULL) { |
| 728 | CERROR ("Can't find page\n"); |
| 729 | return -EFAULT; |
| 730 | } |
| 731 | |
| 732 | fragnob = min((int)(iov->iov_len - offset), nob); |
| 733 | fragnob = min(fragnob, (int)PAGE_SIZE - page_offset); |
| 734 | |
| 735 | sg_set_page(sg, page, fragnob, page_offset); |
| 736 | sg++; |
| 737 | |
| 738 | if (offset + fragnob < iov->iov_len) { |
| 739 | offset += fragnob; |
| 740 | } else { |
| 741 | offset = 0; |
| 742 | iov++; |
| 743 | niov--; |
| 744 | } |
| 745 | nob -= fragnob; |
| 746 | } while (nob > 0); |
| 747 | |
| 748 | return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags); |
| 749 | } |
| 750 | |
| 751 | int |
| 752 | kiblnd_setup_rd_kiov (lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, |
| 753 | int nkiov, lnet_kiov_t *kiov, int offset, int nob) |
| 754 | { |
| 755 | kib_net_t *net = ni->ni_data; |
| 756 | struct scatterlist *sg; |
| 757 | int fragnob; |
| 758 | |
| 759 | CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob); |
| 760 | |
| 761 | LASSERT (nob > 0); |
| 762 | LASSERT (nkiov > 0); |
| 763 | LASSERT (net != NULL); |
| 764 | |
| 765 | while (offset >= kiov->kiov_len) { |
| 766 | offset -= kiov->kiov_len; |
| 767 | nkiov--; |
| 768 | kiov++; |
| 769 | LASSERT (nkiov > 0); |
| 770 | } |
| 771 | |
| 772 | sg = tx->tx_frags; |
| 773 | do { |
| 774 | LASSERT (nkiov > 0); |
| 775 | |
| 776 | fragnob = min((int)(kiov->kiov_len - offset), nob); |
| 777 | |
| 778 | sg_set_page(sg, kiov->kiov_page, fragnob, |
| 779 | kiov->kiov_offset + offset); |
| 780 | sg++; |
| 781 | |
| 782 | offset = 0; |
| 783 | kiov++; |
| 784 | nkiov--; |
| 785 | nob -= fragnob; |
| 786 | } while (nob > 0); |
| 787 | |
| 788 | return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags); |
| 789 | } |
| 790 | |
| 791 | int |
| 792 | kiblnd_post_tx_locked (kib_conn_t *conn, kib_tx_t *tx, int credit) |
| 793 | { |
| 794 | kib_msg_t *msg = tx->tx_msg; |
| 795 | kib_peer_t *peer = conn->ibc_peer; |
| 796 | int ver = conn->ibc_version; |
| 797 | int rc; |
| 798 | int done; |
| 799 | struct ib_send_wr *bad_wrq; |
| 800 | |
| 801 | LASSERT (tx->tx_queued); |
| 802 | /* We rely on this for QP sizing */ |
| 803 | LASSERT (tx->tx_nwrq > 0); |
| 804 | LASSERT (tx->tx_nwrq <= 1 + IBLND_RDMA_FRAGS(ver)); |
| 805 | |
| 806 | LASSERT (credit == 0 || credit == 1); |
| 807 | LASSERT (conn->ibc_outstanding_credits >= 0); |
| 808 | LASSERT (conn->ibc_outstanding_credits <= IBLND_MSG_QUEUE_SIZE(ver)); |
| 809 | LASSERT (conn->ibc_credits >= 0); |
| 810 | LASSERT (conn->ibc_credits <= IBLND_MSG_QUEUE_SIZE(ver)); |
| 811 | |
| 812 | if (conn->ibc_nsends_posted == IBLND_CONCURRENT_SENDS(ver)) { |
| 813 | /* tx completions outstanding... */ |
| 814 | CDEBUG(D_NET, "%s: posted enough\n", |
| 815 | libcfs_nid2str(peer->ibp_nid)); |
| 816 | return -EAGAIN; |
| 817 | } |
| 818 | |
| 819 | if (credit != 0 && conn->ibc_credits == 0) { /* no credits */ |
| 820 | CDEBUG(D_NET, "%s: no credits\n", |
| 821 | libcfs_nid2str(peer->ibp_nid)); |
| 822 | return -EAGAIN; |
| 823 | } |
| 824 | |
| 825 | if (credit != 0 && !IBLND_OOB_CAPABLE(ver) && |
| 826 | conn->ibc_credits == 1 && /* last credit reserved */ |
| 827 | msg->ibm_type != IBLND_MSG_NOOP) { /* for NOOP */ |
| 828 | CDEBUG(D_NET, "%s: not using last credit\n", |
| 829 | libcfs_nid2str(peer->ibp_nid)); |
| 830 | return -EAGAIN; |
| 831 | } |
| 832 | |
| 833 | /* NB don't drop ibc_lock before bumping tx_sending */ |
| 834 | list_del(&tx->tx_list); |
| 835 | tx->tx_queued = 0; |
| 836 | |
| 837 | if (msg->ibm_type == IBLND_MSG_NOOP && |
| 838 | (!kiblnd_need_noop(conn) || /* redundant NOOP */ |
| 839 | (IBLND_OOB_CAPABLE(ver) && /* posted enough NOOP */ |
| 840 | conn->ibc_noops_posted == IBLND_OOB_MSGS(ver)))) { |
| 841 | /* OK to drop when posted enough NOOPs, since |
| 842 | * kiblnd_check_sends will queue NOOP again when |
| 843 | * posted NOOPs complete */ |
| 844 | spin_unlock(&conn->ibc_lock); |
| 845 | kiblnd_tx_done(peer->ibp_ni, tx); |
| 846 | spin_lock(&conn->ibc_lock); |
| 847 | CDEBUG(D_NET, "%s(%d): redundant or enough NOOP\n", |
| 848 | libcfs_nid2str(peer->ibp_nid), |
| 849 | conn->ibc_noops_posted); |
| 850 | return 0; |
| 851 | } |
| 852 | |
| 853 | kiblnd_pack_msg(peer->ibp_ni, msg, ver, conn->ibc_outstanding_credits, |
| 854 | peer->ibp_nid, conn->ibc_incarnation); |
| 855 | |
| 856 | conn->ibc_credits -= credit; |
| 857 | conn->ibc_outstanding_credits = 0; |
| 858 | conn->ibc_nsends_posted++; |
| 859 | if (msg->ibm_type == IBLND_MSG_NOOP) |
| 860 | conn->ibc_noops_posted++; |
| 861 | |
| 862 | /* CAVEAT EMPTOR! This tx could be the PUT_DONE of an RDMA |
| 863 | * PUT. If so, it was first queued here as a PUT_REQ, sent and |
| 864 | * stashed on ibc_active_txs, matched by an incoming PUT_ACK, |
| 865 | * and then re-queued here. It's (just) possible that |
| 866 | * tx_sending is non-zero if we've not done the tx_complete() |
| 867 | * from the first send; hence the ++ rather than = below. */ |
| 868 | tx->tx_sending++; |
| 869 | list_add(&tx->tx_list, &conn->ibc_active_txs); |
| 870 | |
| 871 | /* I'm still holding ibc_lock! */ |
| 872 | if (conn->ibc_state != IBLND_CONN_ESTABLISHED) { |
| 873 | rc = -ECONNABORTED; |
| 874 | } else if (tx->tx_pool->tpo_pool.po_failed || |
| 875 | conn->ibc_hdev != tx->tx_pool->tpo_hdev) { |
| 876 | /* close_conn will launch failover */ |
| 877 | rc = -ENETDOWN; |
| 878 | } else { |
| 879 | rc = ib_post_send(conn->ibc_cmid->qp, |
| 880 | tx->tx_wrq, &bad_wrq); |
| 881 | } |
| 882 | |
| 883 | conn->ibc_last_send = jiffies; |
| 884 | |
| 885 | if (rc == 0) |
| 886 | return 0; |
| 887 | |
| 888 | /* NB credits are transferred in the actual |
| 889 | * message, which can only be the last work item */ |
| 890 | conn->ibc_credits += credit; |
| 891 | conn->ibc_outstanding_credits += msg->ibm_credits; |
| 892 | conn->ibc_nsends_posted--; |
| 893 | if (msg->ibm_type == IBLND_MSG_NOOP) |
| 894 | conn->ibc_noops_posted--; |
| 895 | |
| 896 | tx->tx_status = rc; |
| 897 | tx->tx_waiting = 0; |
| 898 | tx->tx_sending--; |
| 899 | |
| 900 | done = (tx->tx_sending == 0); |
| 901 | if (done) |
| 902 | list_del(&tx->tx_list); |
| 903 | |
| 904 | spin_unlock(&conn->ibc_lock); |
| 905 | |
| 906 | if (conn->ibc_state == IBLND_CONN_ESTABLISHED) |
| 907 | CERROR("Error %d posting transmit to %s\n", |
| 908 | rc, libcfs_nid2str(peer->ibp_nid)); |
| 909 | else |
| 910 | CDEBUG(D_NET, "Error %d posting transmit to %s\n", |
| 911 | rc, libcfs_nid2str(peer->ibp_nid)); |
| 912 | |
| 913 | kiblnd_close_conn(conn, rc); |
| 914 | |
| 915 | if (done) |
| 916 | kiblnd_tx_done(peer->ibp_ni, tx); |
| 917 | |
| 918 | spin_lock(&conn->ibc_lock); |
| 919 | |
| 920 | return -EIO; |
| 921 | } |
| 922 | |
| 923 | void |
| 924 | kiblnd_check_sends (kib_conn_t *conn) |
| 925 | { |
| 926 | int ver = conn->ibc_version; |
| 927 | lnet_ni_t *ni = conn->ibc_peer->ibp_ni; |
| 928 | kib_tx_t *tx; |
| 929 | |
| 930 | /* Don't send anything until after the connection is established */ |
| 931 | if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { |
| 932 | CDEBUG(D_NET, "%s too soon\n", |
| 933 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 934 | return; |
| 935 | } |
| 936 | |
| 937 | spin_lock(&conn->ibc_lock); |
| 938 | |
| 939 | LASSERT (conn->ibc_nsends_posted <= IBLND_CONCURRENT_SENDS(ver)); |
| 940 | LASSERT (!IBLND_OOB_CAPABLE(ver) || |
| 941 | conn->ibc_noops_posted <= IBLND_OOB_MSGS(ver)); |
| 942 | LASSERT (conn->ibc_reserved_credits >= 0); |
| 943 | |
| 944 | while (conn->ibc_reserved_credits > 0 && |
| 945 | !list_empty(&conn->ibc_tx_queue_rsrvd)) { |
| 946 | tx = list_entry(conn->ibc_tx_queue_rsrvd.next, |
| 947 | kib_tx_t, tx_list); |
| 948 | list_del(&tx->tx_list); |
| 949 | list_add_tail(&tx->tx_list, &conn->ibc_tx_queue); |
| 950 | conn->ibc_reserved_credits--; |
| 951 | } |
| 952 | |
| 953 | if (kiblnd_need_noop(conn)) { |
| 954 | spin_unlock(&conn->ibc_lock); |
| 955 | |
| 956 | tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); |
| 957 | if (tx != NULL) |
| 958 | kiblnd_init_tx_msg(ni, tx, IBLND_MSG_NOOP, 0); |
| 959 | |
| 960 | spin_lock(&conn->ibc_lock); |
| 961 | if (tx != NULL) |
| 962 | kiblnd_queue_tx_locked(tx, conn); |
| 963 | } |
| 964 | |
| 965 | kiblnd_conn_addref(conn); /* 1 ref for me.... (see b21911) */ |
| 966 | |
| 967 | for (;;) { |
| 968 | int credit; |
| 969 | |
| 970 | if (!list_empty(&conn->ibc_tx_queue_nocred)) { |
| 971 | credit = 0; |
| 972 | tx = list_entry(conn->ibc_tx_queue_nocred.next, |
| 973 | kib_tx_t, tx_list); |
| 974 | } else if (!list_empty(&conn->ibc_tx_noops)) { |
| 975 | LASSERT (!IBLND_OOB_CAPABLE(ver)); |
| 976 | credit = 1; |
| 977 | tx = list_entry(conn->ibc_tx_noops.next, |
| 978 | kib_tx_t, tx_list); |
| 979 | } else if (!list_empty(&conn->ibc_tx_queue)) { |
| 980 | credit = 1; |
| 981 | tx = list_entry(conn->ibc_tx_queue.next, |
| 982 | kib_tx_t, tx_list); |
| 983 | } else |
| 984 | break; |
| 985 | |
| 986 | if (kiblnd_post_tx_locked(conn, tx, credit) != 0) |
| 987 | break; |
| 988 | } |
| 989 | |
| 990 | spin_unlock(&conn->ibc_lock); |
| 991 | |
| 992 | kiblnd_conn_decref(conn); /* ...until here */ |
| 993 | } |
| 994 | |
| 995 | void |
| 996 | kiblnd_tx_complete (kib_tx_t *tx, int status) |
| 997 | { |
| 998 | int failed = (status != IB_WC_SUCCESS); |
| 999 | kib_conn_t *conn = tx->tx_conn; |
| 1000 | int idle; |
| 1001 | |
| 1002 | LASSERT (tx->tx_sending > 0); |
| 1003 | |
| 1004 | if (failed) { |
| 1005 | if (conn->ibc_state == IBLND_CONN_ESTABLISHED) |
| 1006 | CNETERR("Tx -> %s cookie "LPX64 |
| 1007 | " sending %d waiting %d: failed %d\n", |
| 1008 | libcfs_nid2str(conn->ibc_peer->ibp_nid), |
| 1009 | tx->tx_cookie, tx->tx_sending, tx->tx_waiting, |
| 1010 | status); |
| 1011 | |
| 1012 | kiblnd_close_conn(conn, -EIO); |
| 1013 | } else { |
| 1014 | kiblnd_peer_alive(conn->ibc_peer); |
| 1015 | } |
| 1016 | |
| 1017 | spin_lock(&conn->ibc_lock); |
| 1018 | |
| 1019 | /* I could be racing with rdma completion. Whoever makes 'tx' idle |
| 1020 | * gets to free it, which also drops its ref on 'conn'. */ |
| 1021 | |
| 1022 | tx->tx_sending--; |
| 1023 | conn->ibc_nsends_posted--; |
| 1024 | if (tx->tx_msg->ibm_type == IBLND_MSG_NOOP) |
| 1025 | conn->ibc_noops_posted--; |
| 1026 | |
| 1027 | if (failed) { |
| 1028 | tx->tx_waiting = 0; /* don't wait for peer */ |
| 1029 | tx->tx_status = -EIO; |
| 1030 | } |
| 1031 | |
| 1032 | idle = (tx->tx_sending == 0) && /* This is the final callback */ |
| 1033 | !tx->tx_waiting && /* Not waiting for peer */ |
| 1034 | !tx->tx_queued; /* Not re-queued (PUT_DONE) */ |
| 1035 | if (idle) |
| 1036 | list_del(&tx->tx_list); |
| 1037 | |
| 1038 | kiblnd_conn_addref(conn); /* 1 ref for me.... */ |
| 1039 | |
| 1040 | spin_unlock(&conn->ibc_lock); |
| 1041 | |
| 1042 | if (idle) |
| 1043 | kiblnd_tx_done(conn->ibc_peer->ibp_ni, tx); |
| 1044 | |
| 1045 | kiblnd_check_sends(conn); |
| 1046 | |
| 1047 | kiblnd_conn_decref(conn); /* ...until here */ |
| 1048 | } |
| 1049 | |
| 1050 | void |
| 1051 | kiblnd_init_tx_msg (lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob) |
| 1052 | { |
| 1053 | kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev; |
| 1054 | struct ib_sge *sge = &tx->tx_sge[tx->tx_nwrq]; |
| 1055 | struct ib_send_wr *wrq = &tx->tx_wrq[tx->tx_nwrq]; |
| 1056 | int nob = offsetof (kib_msg_t, ibm_u) + body_nob; |
| 1057 | struct ib_mr *mr; |
| 1058 | |
| 1059 | LASSERT (tx->tx_nwrq >= 0); |
| 1060 | LASSERT (tx->tx_nwrq < IBLND_MAX_RDMA_FRAGS + 1); |
| 1061 | LASSERT (nob <= IBLND_MSG_SIZE); |
| 1062 | |
| 1063 | kiblnd_init_msg(tx->tx_msg, type, body_nob); |
| 1064 | |
| 1065 | mr = kiblnd_find_dma_mr(hdev, tx->tx_msgaddr, nob); |
| 1066 | LASSERT (mr != NULL); |
| 1067 | |
| 1068 | sge->lkey = mr->lkey; |
| 1069 | sge->addr = tx->tx_msgaddr; |
| 1070 | sge->length = nob; |
| 1071 | |
| 1072 | memset(wrq, 0, sizeof(*wrq)); |
| 1073 | |
| 1074 | wrq->next = NULL; |
| 1075 | wrq->wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_TX); |
| 1076 | wrq->sg_list = sge; |
| 1077 | wrq->num_sge = 1; |
| 1078 | wrq->opcode = IB_WR_SEND; |
| 1079 | wrq->send_flags = IB_SEND_SIGNALED; |
| 1080 | |
| 1081 | tx->tx_nwrq++; |
| 1082 | } |
| 1083 | |
| 1084 | int |
| 1085 | kiblnd_init_rdma (kib_conn_t *conn, kib_tx_t *tx, int type, |
| 1086 | int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie) |
| 1087 | { |
| 1088 | kib_msg_t *ibmsg = tx->tx_msg; |
| 1089 | kib_rdma_desc_t *srcrd = tx->tx_rd; |
| 1090 | struct ib_sge *sge = &tx->tx_sge[0]; |
| 1091 | struct ib_send_wr *wrq = &tx->tx_wrq[0]; |
| 1092 | int rc = resid; |
| 1093 | int srcidx; |
| 1094 | int dstidx; |
| 1095 | int wrknob; |
| 1096 | |
| 1097 | LASSERT (!in_interrupt()); |
| 1098 | LASSERT (tx->tx_nwrq == 0); |
| 1099 | LASSERT (type == IBLND_MSG_GET_DONE || |
| 1100 | type == IBLND_MSG_PUT_DONE); |
| 1101 | |
| 1102 | srcidx = dstidx = 0; |
| 1103 | |
| 1104 | while (resid > 0) { |
| 1105 | if (srcidx >= srcrd->rd_nfrags) { |
| 1106 | CERROR("Src buffer exhausted: %d frags\n", srcidx); |
| 1107 | rc = -EPROTO; |
| 1108 | break; |
| 1109 | } |
| 1110 | |
| 1111 | if (dstidx == dstrd->rd_nfrags) { |
| 1112 | CERROR("Dst buffer exhausted: %d frags\n", dstidx); |
| 1113 | rc = -EPROTO; |
| 1114 | break; |
| 1115 | } |
| 1116 | |
| 1117 | if (tx->tx_nwrq == IBLND_RDMA_FRAGS(conn->ibc_version)) { |
| 1118 | CERROR("RDMA too fragmented for %s (%d): " |
| 1119 | "%d/%d src %d/%d dst frags\n", |
| 1120 | libcfs_nid2str(conn->ibc_peer->ibp_nid), |
| 1121 | IBLND_RDMA_FRAGS(conn->ibc_version), |
| 1122 | srcidx, srcrd->rd_nfrags, |
| 1123 | dstidx, dstrd->rd_nfrags); |
| 1124 | rc = -EMSGSIZE; |
| 1125 | break; |
| 1126 | } |
| 1127 | |
| 1128 | wrknob = MIN(MIN(kiblnd_rd_frag_size(srcrd, srcidx), |
| 1129 | kiblnd_rd_frag_size(dstrd, dstidx)), resid); |
| 1130 | |
| 1131 | sge = &tx->tx_sge[tx->tx_nwrq]; |
| 1132 | sge->addr = kiblnd_rd_frag_addr(srcrd, srcidx); |
| 1133 | sge->lkey = kiblnd_rd_frag_key(srcrd, srcidx); |
| 1134 | sge->length = wrknob; |
| 1135 | |
| 1136 | wrq = &tx->tx_wrq[tx->tx_nwrq]; |
| 1137 | |
| 1138 | wrq->next = wrq + 1; |
| 1139 | wrq->wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_RDMA); |
| 1140 | wrq->sg_list = sge; |
| 1141 | wrq->num_sge = 1; |
| 1142 | wrq->opcode = IB_WR_RDMA_WRITE; |
| 1143 | wrq->send_flags = 0; |
| 1144 | |
| 1145 | wrq->wr.rdma.remote_addr = kiblnd_rd_frag_addr(dstrd, dstidx); |
| 1146 | wrq->wr.rdma.rkey = kiblnd_rd_frag_key(dstrd, dstidx); |
| 1147 | |
| 1148 | srcidx = kiblnd_rd_consume_frag(srcrd, srcidx, wrknob); |
| 1149 | dstidx = kiblnd_rd_consume_frag(dstrd, dstidx, wrknob); |
| 1150 | |
| 1151 | resid -= wrknob; |
| 1152 | |
| 1153 | tx->tx_nwrq++; |
| 1154 | wrq++; |
| 1155 | sge++; |
| 1156 | } |
| 1157 | |
| 1158 | if (rc < 0) /* no RDMA if completing with failure */ |
| 1159 | tx->tx_nwrq = 0; |
| 1160 | |
| 1161 | ibmsg->ibm_u.completion.ibcm_status = rc; |
| 1162 | ibmsg->ibm_u.completion.ibcm_cookie = dstcookie; |
| 1163 | kiblnd_init_tx_msg(conn->ibc_peer->ibp_ni, tx, |
| 1164 | type, sizeof (kib_completion_msg_t)); |
| 1165 | |
| 1166 | return rc; |
| 1167 | } |
| 1168 | |
| 1169 | void |
| 1170 | kiblnd_queue_tx_locked (kib_tx_t *tx, kib_conn_t *conn) |
| 1171 | { |
| 1172 | struct list_head *q; |
| 1173 | |
| 1174 | LASSERT (tx->tx_nwrq > 0); /* work items set up */ |
| 1175 | LASSERT (!tx->tx_queued); /* not queued for sending already */ |
| 1176 | LASSERT (conn->ibc_state >= IBLND_CONN_ESTABLISHED); |
| 1177 | |
| 1178 | tx->tx_queued = 1; |
| 1179 | tx->tx_deadline = jiffies + (*kiblnd_tunables.kib_timeout * HZ); |
| 1180 | |
| 1181 | if (tx->tx_conn == NULL) { |
| 1182 | kiblnd_conn_addref(conn); |
| 1183 | tx->tx_conn = conn; |
| 1184 | LASSERT (tx->tx_msg->ibm_type != IBLND_MSG_PUT_DONE); |
| 1185 | } else { |
| 1186 | /* PUT_DONE first attached to conn as a PUT_REQ */ |
| 1187 | LASSERT (tx->tx_conn == conn); |
| 1188 | LASSERT (tx->tx_msg->ibm_type == IBLND_MSG_PUT_DONE); |
| 1189 | } |
| 1190 | |
| 1191 | switch (tx->tx_msg->ibm_type) { |
| 1192 | default: |
| 1193 | LBUG(); |
| 1194 | |
| 1195 | case IBLND_MSG_PUT_REQ: |
| 1196 | case IBLND_MSG_GET_REQ: |
| 1197 | q = &conn->ibc_tx_queue_rsrvd; |
| 1198 | break; |
| 1199 | |
| 1200 | case IBLND_MSG_PUT_NAK: |
| 1201 | case IBLND_MSG_PUT_ACK: |
| 1202 | case IBLND_MSG_PUT_DONE: |
| 1203 | case IBLND_MSG_GET_DONE: |
| 1204 | q = &conn->ibc_tx_queue_nocred; |
| 1205 | break; |
| 1206 | |
| 1207 | case IBLND_MSG_NOOP: |
| 1208 | if (IBLND_OOB_CAPABLE(conn->ibc_version)) |
| 1209 | q = &conn->ibc_tx_queue_nocred; |
| 1210 | else |
| 1211 | q = &conn->ibc_tx_noops; |
| 1212 | break; |
| 1213 | |
| 1214 | case IBLND_MSG_IMMEDIATE: |
| 1215 | q = &conn->ibc_tx_queue; |
| 1216 | break; |
| 1217 | } |
| 1218 | |
| 1219 | list_add_tail(&tx->tx_list, q); |
| 1220 | } |
| 1221 | |
| 1222 | void |
| 1223 | kiblnd_queue_tx (kib_tx_t *tx, kib_conn_t *conn) |
| 1224 | { |
| 1225 | spin_lock(&conn->ibc_lock); |
| 1226 | kiblnd_queue_tx_locked(tx, conn); |
| 1227 | spin_unlock(&conn->ibc_lock); |
| 1228 | |
| 1229 | kiblnd_check_sends(conn); |
| 1230 | } |
| 1231 | |
| 1232 | static int kiblnd_resolve_addr(struct rdma_cm_id *cmid, |
| 1233 | struct sockaddr_in *srcaddr, |
| 1234 | struct sockaddr_in *dstaddr, |
| 1235 | int timeout_ms) |
| 1236 | { |
| 1237 | unsigned short port; |
| 1238 | int rc; |
| 1239 | |
| 1240 | /* allow the port to be reused */ |
| 1241 | rc = rdma_set_reuseaddr(cmid, 1); |
| 1242 | if (rc != 0) { |
| 1243 | CERROR("Unable to set reuse on cmid: %d\n", rc); |
| 1244 | return rc; |
| 1245 | } |
| 1246 | |
| 1247 | /* look for a free privileged port */ |
| 1248 | for (port = PROT_SOCK-1; port > 0; port--) { |
| 1249 | srcaddr->sin_port = htons(port); |
| 1250 | rc = rdma_resolve_addr(cmid, |
| 1251 | (struct sockaddr *)srcaddr, |
| 1252 | (struct sockaddr *)dstaddr, |
| 1253 | timeout_ms); |
| 1254 | if (rc == 0) { |
| 1255 | CDEBUG(D_NET, "bound to port %hu\n", port); |
| 1256 | return 0; |
| 1257 | } else if (rc == -EADDRINUSE || rc == -EADDRNOTAVAIL) { |
| 1258 | CDEBUG(D_NET, "bind to port %hu failed: %d\n", |
| 1259 | port, rc); |
| 1260 | } else { |
| 1261 | return rc; |
| 1262 | } |
| 1263 | } |
| 1264 | |
| 1265 | CERROR("Failed to bind to a free privileged port\n"); |
| 1266 | return rc; |
| 1267 | } |
| 1268 | |
| 1269 | void |
| 1270 | kiblnd_connect_peer (kib_peer_t *peer) |
| 1271 | { |
| 1272 | struct rdma_cm_id *cmid; |
| 1273 | kib_dev_t *dev; |
| 1274 | kib_net_t *net = peer->ibp_ni->ni_data; |
| 1275 | struct sockaddr_in srcaddr; |
| 1276 | struct sockaddr_in dstaddr; |
| 1277 | int rc; |
| 1278 | |
| 1279 | LASSERT (net != NULL); |
| 1280 | LASSERT (peer->ibp_connecting > 0); |
| 1281 | |
| 1282 | cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, peer, RDMA_PS_TCP, |
| 1283 | IB_QPT_RC); |
| 1284 | |
| 1285 | if (IS_ERR(cmid)) { |
| 1286 | CERROR("Can't create CMID for %s: %ld\n", |
| 1287 | libcfs_nid2str(peer->ibp_nid), PTR_ERR(cmid)); |
| 1288 | rc = PTR_ERR(cmid); |
| 1289 | goto failed; |
| 1290 | } |
| 1291 | |
| 1292 | dev = net->ibn_dev; |
| 1293 | memset(&srcaddr, 0, sizeof(srcaddr)); |
| 1294 | srcaddr.sin_family = AF_INET; |
| 1295 | srcaddr.sin_addr.s_addr = htonl(dev->ibd_ifip); |
| 1296 | |
| 1297 | memset(&dstaddr, 0, sizeof(dstaddr)); |
| 1298 | dstaddr.sin_family = AF_INET; |
| 1299 | dstaddr.sin_port = htons(*kiblnd_tunables.kib_service); |
| 1300 | dstaddr.sin_addr.s_addr = htonl(LNET_NIDADDR(peer->ibp_nid)); |
| 1301 | |
| 1302 | kiblnd_peer_addref(peer); /* cmid's ref */ |
| 1303 | |
| 1304 | if (*kiblnd_tunables.kib_use_priv_port) { |
| 1305 | rc = kiblnd_resolve_addr(cmid, &srcaddr, &dstaddr, |
| 1306 | *kiblnd_tunables.kib_timeout * 1000); |
| 1307 | } else { |
| 1308 | rc = rdma_resolve_addr(cmid, |
| 1309 | (struct sockaddr *)&srcaddr, |
| 1310 | (struct sockaddr *)&dstaddr, |
| 1311 | *kiblnd_tunables.kib_timeout * 1000); |
| 1312 | } |
| 1313 | if (rc != 0) { |
| 1314 | /* Can't initiate address resolution: */ |
| 1315 | CERROR("Can't resolve addr for %s: %d\n", |
| 1316 | libcfs_nid2str(peer->ibp_nid), rc); |
| 1317 | goto failed2; |
| 1318 | } |
| 1319 | |
| 1320 | LASSERT (cmid->device != NULL); |
Peng Tao | 5e8f692 | 2013-07-15 22:27:09 +0800 | [diff] [blame] | 1321 | CDEBUG(D_NET, "%s: connection bound to %s:%pI4h:%s\n", |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1322 | libcfs_nid2str(peer->ibp_nid), dev->ibd_ifname, |
Peng Tao | 5e8f692 | 2013-07-15 22:27:09 +0800 | [diff] [blame] | 1323 | &dev->ibd_ifip, cmid->device->name); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1324 | |
| 1325 | return; |
| 1326 | |
| 1327 | failed2: |
| 1328 | kiblnd_peer_decref(peer); /* cmid's ref */ |
| 1329 | rdma_destroy_id(cmid); |
| 1330 | failed: |
| 1331 | kiblnd_peer_connect_failed(peer, 1, rc); |
| 1332 | } |
| 1333 | |
| 1334 | void |
| 1335 | kiblnd_launch_tx (lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) |
| 1336 | { |
| 1337 | kib_peer_t *peer; |
| 1338 | kib_peer_t *peer2; |
| 1339 | kib_conn_t *conn; |
| 1340 | rwlock_t *g_lock = &kiblnd_data.kib_global_lock; |
| 1341 | unsigned long flags; |
| 1342 | int rc; |
| 1343 | |
| 1344 | /* If I get here, I've committed to send, so I complete the tx with |
| 1345 | * failure on any problems */ |
| 1346 | |
| 1347 | LASSERT (tx == NULL || tx->tx_conn == NULL); /* only set when assigned a conn */ |
| 1348 | LASSERT (tx == NULL || tx->tx_nwrq > 0); /* work items have been set up */ |
| 1349 | |
| 1350 | /* First time, just use a read lock since I expect to find my peer |
| 1351 | * connected */ |
| 1352 | read_lock_irqsave(g_lock, flags); |
| 1353 | |
| 1354 | peer = kiblnd_find_peer_locked(nid); |
| 1355 | if (peer != NULL && !list_empty(&peer->ibp_conns)) { |
| 1356 | /* Found a peer with an established connection */ |
| 1357 | conn = kiblnd_get_conn_locked(peer); |
| 1358 | kiblnd_conn_addref(conn); /* 1 ref for me... */ |
| 1359 | |
| 1360 | read_unlock_irqrestore(g_lock, flags); |
| 1361 | |
| 1362 | if (tx != NULL) |
| 1363 | kiblnd_queue_tx(tx, conn); |
| 1364 | kiblnd_conn_decref(conn); /* ...to here */ |
| 1365 | return; |
| 1366 | } |
| 1367 | |
| 1368 | read_unlock(g_lock); |
| 1369 | /* Re-try with a write lock */ |
| 1370 | write_lock(g_lock); |
| 1371 | |
| 1372 | peer = kiblnd_find_peer_locked(nid); |
| 1373 | if (peer != NULL) { |
| 1374 | if (list_empty(&peer->ibp_conns)) { |
| 1375 | /* found a peer, but it's still connecting... */ |
| 1376 | LASSERT (peer->ibp_connecting != 0 || |
| 1377 | peer->ibp_accepting != 0); |
| 1378 | if (tx != NULL) |
| 1379 | list_add_tail(&tx->tx_list, |
| 1380 | &peer->ibp_tx_queue); |
| 1381 | write_unlock_irqrestore(g_lock, flags); |
| 1382 | } else { |
| 1383 | conn = kiblnd_get_conn_locked(peer); |
| 1384 | kiblnd_conn_addref(conn); /* 1 ref for me... */ |
| 1385 | |
| 1386 | write_unlock_irqrestore(g_lock, flags); |
| 1387 | |
| 1388 | if (tx != NULL) |
| 1389 | kiblnd_queue_tx(tx, conn); |
| 1390 | kiblnd_conn_decref(conn); /* ...to here */ |
| 1391 | } |
| 1392 | return; |
| 1393 | } |
| 1394 | |
| 1395 | write_unlock_irqrestore(g_lock, flags); |
| 1396 | |
| 1397 | /* Allocate a peer ready to add to the peer table and retry */ |
| 1398 | rc = kiblnd_create_peer(ni, &peer, nid); |
| 1399 | if (rc != 0) { |
| 1400 | CERROR("Can't create peer %s\n", libcfs_nid2str(nid)); |
| 1401 | if (tx != NULL) { |
| 1402 | tx->tx_status = -EHOSTUNREACH; |
| 1403 | tx->tx_waiting = 0; |
| 1404 | kiblnd_tx_done(ni, tx); |
| 1405 | } |
| 1406 | return; |
| 1407 | } |
| 1408 | |
| 1409 | write_lock_irqsave(g_lock, flags); |
| 1410 | |
| 1411 | peer2 = kiblnd_find_peer_locked(nid); |
| 1412 | if (peer2 != NULL) { |
| 1413 | if (list_empty(&peer2->ibp_conns)) { |
| 1414 | /* found a peer, but it's still connecting... */ |
| 1415 | LASSERT (peer2->ibp_connecting != 0 || |
| 1416 | peer2->ibp_accepting != 0); |
| 1417 | if (tx != NULL) |
| 1418 | list_add_tail(&tx->tx_list, |
| 1419 | &peer2->ibp_tx_queue); |
| 1420 | write_unlock_irqrestore(g_lock, flags); |
| 1421 | } else { |
| 1422 | conn = kiblnd_get_conn_locked(peer2); |
| 1423 | kiblnd_conn_addref(conn); /* 1 ref for me... */ |
| 1424 | |
| 1425 | write_unlock_irqrestore(g_lock, flags); |
| 1426 | |
| 1427 | if (tx != NULL) |
| 1428 | kiblnd_queue_tx(tx, conn); |
| 1429 | kiblnd_conn_decref(conn); /* ...to here */ |
| 1430 | } |
| 1431 | |
| 1432 | kiblnd_peer_decref(peer); |
| 1433 | return; |
| 1434 | } |
| 1435 | |
| 1436 | /* Brand new peer */ |
| 1437 | LASSERT (peer->ibp_connecting == 0); |
| 1438 | peer->ibp_connecting = 1; |
| 1439 | |
| 1440 | /* always called with a ref on ni, which prevents ni being shutdown */ |
| 1441 | LASSERT (((kib_net_t *)ni->ni_data)->ibn_shutdown == 0); |
| 1442 | |
| 1443 | if (tx != NULL) |
| 1444 | list_add_tail(&tx->tx_list, &peer->ibp_tx_queue); |
| 1445 | |
| 1446 | kiblnd_peer_addref(peer); |
| 1447 | list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid)); |
| 1448 | |
| 1449 | write_unlock_irqrestore(g_lock, flags); |
| 1450 | |
| 1451 | kiblnd_connect_peer(peer); |
| 1452 | kiblnd_peer_decref(peer); |
| 1453 | } |
| 1454 | |
| 1455 | int |
| 1456 | kiblnd_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) |
| 1457 | { |
| 1458 | lnet_hdr_t *hdr = &lntmsg->msg_hdr; |
| 1459 | int type = lntmsg->msg_type; |
| 1460 | lnet_process_id_t target = lntmsg->msg_target; |
| 1461 | int target_is_router = lntmsg->msg_target_is_router; |
| 1462 | int routing = lntmsg->msg_routing; |
| 1463 | unsigned int payload_niov = lntmsg->msg_niov; |
| 1464 | struct iovec *payload_iov = lntmsg->msg_iov; |
| 1465 | lnet_kiov_t *payload_kiov = lntmsg->msg_kiov; |
| 1466 | unsigned int payload_offset = lntmsg->msg_offset; |
| 1467 | unsigned int payload_nob = lntmsg->msg_len; |
| 1468 | kib_msg_t *ibmsg; |
| 1469 | kib_tx_t *tx; |
| 1470 | int nob; |
| 1471 | int rc; |
| 1472 | |
| 1473 | /* NB 'private' is different depending on what we're sending.... */ |
| 1474 | |
| 1475 | CDEBUG(D_NET, "sending %d bytes in %d frags to %s\n", |
| 1476 | payload_nob, payload_niov, libcfs_id2str(target)); |
| 1477 | |
| 1478 | LASSERT (payload_nob == 0 || payload_niov > 0); |
| 1479 | LASSERT (payload_niov <= LNET_MAX_IOV); |
| 1480 | |
| 1481 | /* Thread context */ |
| 1482 | LASSERT (!in_interrupt()); |
| 1483 | /* payload is either all vaddrs or all pages */ |
| 1484 | LASSERT (!(payload_kiov != NULL && payload_iov != NULL)); |
| 1485 | |
| 1486 | switch (type) { |
| 1487 | default: |
| 1488 | LBUG(); |
| 1489 | return (-EIO); |
| 1490 | |
| 1491 | case LNET_MSG_ACK: |
| 1492 | LASSERT (payload_nob == 0); |
| 1493 | break; |
| 1494 | |
| 1495 | case LNET_MSG_GET: |
| 1496 | if (routing || target_is_router) |
| 1497 | break; /* send IMMEDIATE */ |
| 1498 | |
| 1499 | /* is the REPLY message too small for RDMA? */ |
| 1500 | nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[lntmsg->msg_md->md_length]); |
| 1501 | if (nob <= IBLND_MSG_SIZE) |
| 1502 | break; /* send IMMEDIATE */ |
| 1503 | |
| 1504 | tx = kiblnd_get_idle_tx(ni, target.nid); |
| 1505 | if (tx == NULL) { |
| 1506 | CERROR("Can't allocate txd for GET to %s\n", |
| 1507 | libcfs_nid2str(target.nid)); |
| 1508 | return -ENOMEM; |
| 1509 | } |
| 1510 | |
| 1511 | ibmsg = tx->tx_msg; |
| 1512 | |
| 1513 | if ((lntmsg->msg_md->md_options & LNET_MD_KIOV) == 0) |
| 1514 | rc = kiblnd_setup_rd_iov(ni, tx, |
| 1515 | &ibmsg->ibm_u.get.ibgm_rd, |
| 1516 | lntmsg->msg_md->md_niov, |
| 1517 | lntmsg->msg_md->md_iov.iov, |
| 1518 | 0, lntmsg->msg_md->md_length); |
| 1519 | else |
| 1520 | rc = kiblnd_setup_rd_kiov(ni, tx, |
| 1521 | &ibmsg->ibm_u.get.ibgm_rd, |
| 1522 | lntmsg->msg_md->md_niov, |
| 1523 | lntmsg->msg_md->md_iov.kiov, |
| 1524 | 0, lntmsg->msg_md->md_length); |
| 1525 | if (rc != 0) { |
| 1526 | CERROR("Can't setup GET sink for %s: %d\n", |
| 1527 | libcfs_nid2str(target.nid), rc); |
| 1528 | kiblnd_tx_done(ni, tx); |
| 1529 | return -EIO; |
| 1530 | } |
| 1531 | |
| 1532 | nob = offsetof(kib_get_msg_t, ibgm_rd.rd_frags[tx->tx_nfrags]); |
| 1533 | ibmsg->ibm_u.get.ibgm_cookie = tx->tx_cookie; |
| 1534 | ibmsg->ibm_u.get.ibgm_hdr = *hdr; |
| 1535 | |
| 1536 | kiblnd_init_tx_msg(ni, tx, IBLND_MSG_GET_REQ, nob); |
| 1537 | |
| 1538 | tx->tx_lntmsg[1] = lnet_create_reply_msg(ni, lntmsg); |
| 1539 | if (tx->tx_lntmsg[1] == NULL) { |
| 1540 | CERROR("Can't create reply for GET -> %s\n", |
| 1541 | libcfs_nid2str(target.nid)); |
| 1542 | kiblnd_tx_done(ni, tx); |
| 1543 | return -EIO; |
| 1544 | } |
| 1545 | |
| 1546 | tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg[0,1] on completion */ |
| 1547 | tx->tx_waiting = 1; /* waiting for GET_DONE */ |
| 1548 | kiblnd_launch_tx(ni, tx, target.nid); |
| 1549 | return 0; |
| 1550 | |
| 1551 | case LNET_MSG_REPLY: |
| 1552 | case LNET_MSG_PUT: |
| 1553 | /* Is the payload small enough not to need RDMA? */ |
| 1554 | nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]); |
| 1555 | if (nob <= IBLND_MSG_SIZE) |
| 1556 | break; /* send IMMEDIATE */ |
| 1557 | |
| 1558 | tx = kiblnd_get_idle_tx(ni, target.nid); |
| 1559 | if (tx == NULL) { |
| 1560 | CERROR("Can't allocate %s txd for %s\n", |
| 1561 | type == LNET_MSG_PUT ? "PUT" : "REPLY", |
| 1562 | libcfs_nid2str(target.nid)); |
| 1563 | return -ENOMEM; |
| 1564 | } |
| 1565 | |
| 1566 | if (payload_kiov == NULL) |
| 1567 | rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd, |
| 1568 | payload_niov, payload_iov, |
| 1569 | payload_offset, payload_nob); |
| 1570 | else |
| 1571 | rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd, |
| 1572 | payload_niov, payload_kiov, |
| 1573 | payload_offset, payload_nob); |
| 1574 | if (rc != 0) { |
| 1575 | CERROR("Can't setup PUT src for %s: %d\n", |
| 1576 | libcfs_nid2str(target.nid), rc); |
| 1577 | kiblnd_tx_done(ni, tx); |
| 1578 | return -EIO; |
| 1579 | } |
| 1580 | |
| 1581 | ibmsg = tx->tx_msg; |
| 1582 | ibmsg->ibm_u.putreq.ibprm_hdr = *hdr; |
| 1583 | ibmsg->ibm_u.putreq.ibprm_cookie = tx->tx_cookie; |
| 1584 | kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_REQ, sizeof(kib_putreq_msg_t)); |
| 1585 | |
| 1586 | tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */ |
| 1587 | tx->tx_waiting = 1; /* waiting for PUT_{ACK,NAK} */ |
| 1588 | kiblnd_launch_tx(ni, tx, target.nid); |
| 1589 | return 0; |
| 1590 | } |
| 1591 | |
| 1592 | /* send IMMEDIATE */ |
| 1593 | |
| 1594 | LASSERT (offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]) |
| 1595 | <= IBLND_MSG_SIZE); |
| 1596 | |
| 1597 | tx = kiblnd_get_idle_tx(ni, target.nid); |
| 1598 | if (tx == NULL) { |
| 1599 | CERROR ("Can't send %d to %s: tx descs exhausted\n", |
| 1600 | type, libcfs_nid2str(target.nid)); |
| 1601 | return -ENOMEM; |
| 1602 | } |
| 1603 | |
| 1604 | ibmsg = tx->tx_msg; |
| 1605 | ibmsg->ibm_u.immediate.ibim_hdr = *hdr; |
| 1606 | |
| 1607 | if (payload_kiov != NULL) |
| 1608 | lnet_copy_kiov2flat(IBLND_MSG_SIZE, ibmsg, |
| 1609 | offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), |
| 1610 | payload_niov, payload_kiov, |
| 1611 | payload_offset, payload_nob); |
| 1612 | else |
| 1613 | lnet_copy_iov2flat(IBLND_MSG_SIZE, ibmsg, |
| 1614 | offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), |
| 1615 | payload_niov, payload_iov, |
| 1616 | payload_offset, payload_nob); |
| 1617 | |
| 1618 | nob = offsetof(kib_immediate_msg_t, ibim_payload[payload_nob]); |
| 1619 | kiblnd_init_tx_msg(ni, tx, IBLND_MSG_IMMEDIATE, nob); |
| 1620 | |
| 1621 | tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */ |
| 1622 | kiblnd_launch_tx(ni, tx, target.nid); |
| 1623 | return 0; |
| 1624 | } |
| 1625 | |
| 1626 | void |
| 1627 | kiblnd_reply (lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg) |
| 1628 | { |
| 1629 | lnet_process_id_t target = lntmsg->msg_target; |
| 1630 | unsigned int niov = lntmsg->msg_niov; |
| 1631 | struct iovec *iov = lntmsg->msg_iov; |
| 1632 | lnet_kiov_t *kiov = lntmsg->msg_kiov; |
| 1633 | unsigned int offset = lntmsg->msg_offset; |
| 1634 | unsigned int nob = lntmsg->msg_len; |
| 1635 | kib_tx_t *tx; |
| 1636 | int rc; |
| 1637 | |
| 1638 | tx = kiblnd_get_idle_tx(ni, rx->rx_conn->ibc_peer->ibp_nid); |
| 1639 | if (tx == NULL) { |
| 1640 | CERROR("Can't get tx for REPLY to %s\n", |
| 1641 | libcfs_nid2str(target.nid)); |
| 1642 | goto failed_0; |
| 1643 | } |
| 1644 | |
| 1645 | if (nob == 0) |
| 1646 | rc = 0; |
| 1647 | else if (kiov == NULL) |
| 1648 | rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd, |
| 1649 | niov, iov, offset, nob); |
| 1650 | else |
| 1651 | rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd, |
| 1652 | niov, kiov, offset, nob); |
| 1653 | |
| 1654 | if (rc != 0) { |
| 1655 | CERROR("Can't setup GET src for %s: %d\n", |
| 1656 | libcfs_nid2str(target.nid), rc); |
| 1657 | goto failed_1; |
| 1658 | } |
| 1659 | |
| 1660 | rc = kiblnd_init_rdma(rx->rx_conn, tx, |
| 1661 | IBLND_MSG_GET_DONE, nob, |
| 1662 | &rx->rx_msg->ibm_u.get.ibgm_rd, |
| 1663 | rx->rx_msg->ibm_u.get.ibgm_cookie); |
| 1664 | if (rc < 0) { |
| 1665 | CERROR("Can't setup rdma for GET from %s: %d\n", |
| 1666 | libcfs_nid2str(target.nid), rc); |
| 1667 | goto failed_1; |
| 1668 | } |
| 1669 | |
| 1670 | if (nob == 0) { |
| 1671 | /* No RDMA: local completion may happen now! */ |
| 1672 | lnet_finalize(ni, lntmsg, 0); |
| 1673 | } else { |
| 1674 | /* RDMA: lnet_finalize(lntmsg) when it |
| 1675 | * completes */ |
| 1676 | tx->tx_lntmsg[0] = lntmsg; |
| 1677 | } |
| 1678 | |
| 1679 | kiblnd_queue_tx(tx, rx->rx_conn); |
| 1680 | return; |
| 1681 | |
| 1682 | failed_1: |
| 1683 | kiblnd_tx_done(ni, tx); |
| 1684 | failed_0: |
| 1685 | lnet_finalize(ni, lntmsg, -EIO); |
| 1686 | } |
| 1687 | |
| 1688 | int |
| 1689 | kiblnd_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed, |
| 1690 | unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov, |
| 1691 | unsigned int offset, unsigned int mlen, unsigned int rlen) |
| 1692 | { |
| 1693 | kib_rx_t *rx = private; |
| 1694 | kib_msg_t *rxmsg = rx->rx_msg; |
| 1695 | kib_conn_t *conn = rx->rx_conn; |
| 1696 | kib_tx_t *tx; |
| 1697 | kib_msg_t *txmsg; |
| 1698 | int nob; |
| 1699 | int post_credit = IBLND_POSTRX_PEER_CREDIT; |
| 1700 | int rc = 0; |
| 1701 | |
| 1702 | LASSERT (mlen <= rlen); |
| 1703 | LASSERT (!in_interrupt()); |
| 1704 | /* Either all pages or all vaddrs */ |
| 1705 | LASSERT (!(kiov != NULL && iov != NULL)); |
| 1706 | |
| 1707 | switch (rxmsg->ibm_type) { |
| 1708 | default: |
| 1709 | LBUG(); |
| 1710 | |
| 1711 | case IBLND_MSG_IMMEDIATE: |
| 1712 | nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[rlen]); |
| 1713 | if (nob > rx->rx_nob) { |
| 1714 | CERROR ("Immediate message from %s too big: %d(%d)\n", |
| 1715 | libcfs_nid2str(rxmsg->ibm_u.immediate.ibim_hdr.src_nid), |
| 1716 | nob, rx->rx_nob); |
| 1717 | rc = -EPROTO; |
| 1718 | break; |
| 1719 | } |
| 1720 | |
| 1721 | if (kiov != NULL) |
| 1722 | lnet_copy_flat2kiov(niov, kiov, offset, |
| 1723 | IBLND_MSG_SIZE, rxmsg, |
| 1724 | offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), |
| 1725 | mlen); |
| 1726 | else |
| 1727 | lnet_copy_flat2iov(niov, iov, offset, |
| 1728 | IBLND_MSG_SIZE, rxmsg, |
| 1729 | offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), |
| 1730 | mlen); |
| 1731 | lnet_finalize (ni, lntmsg, 0); |
| 1732 | break; |
| 1733 | |
| 1734 | case IBLND_MSG_PUT_REQ: |
| 1735 | if (mlen == 0) { |
| 1736 | lnet_finalize(ni, lntmsg, 0); |
| 1737 | kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, 0, |
| 1738 | rxmsg->ibm_u.putreq.ibprm_cookie); |
| 1739 | break; |
| 1740 | } |
| 1741 | |
| 1742 | tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); |
| 1743 | if (tx == NULL) { |
| 1744 | CERROR("Can't allocate tx for %s\n", |
| 1745 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 1746 | /* Not replying will break the connection */ |
| 1747 | rc = -ENOMEM; |
| 1748 | break; |
| 1749 | } |
| 1750 | |
| 1751 | txmsg = tx->tx_msg; |
| 1752 | if (kiov == NULL) |
| 1753 | rc = kiblnd_setup_rd_iov(ni, tx, |
| 1754 | &txmsg->ibm_u.putack.ibpam_rd, |
| 1755 | niov, iov, offset, mlen); |
| 1756 | else |
| 1757 | rc = kiblnd_setup_rd_kiov(ni, tx, |
| 1758 | &txmsg->ibm_u.putack.ibpam_rd, |
| 1759 | niov, kiov, offset, mlen); |
| 1760 | if (rc != 0) { |
| 1761 | CERROR("Can't setup PUT sink for %s: %d\n", |
| 1762 | libcfs_nid2str(conn->ibc_peer->ibp_nid), rc); |
| 1763 | kiblnd_tx_done(ni, tx); |
| 1764 | /* tell peer it's over */ |
| 1765 | kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, rc, |
| 1766 | rxmsg->ibm_u.putreq.ibprm_cookie); |
| 1767 | break; |
| 1768 | } |
| 1769 | |
| 1770 | nob = offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[tx->tx_nfrags]); |
| 1771 | txmsg->ibm_u.putack.ibpam_src_cookie = rxmsg->ibm_u.putreq.ibprm_cookie; |
| 1772 | txmsg->ibm_u.putack.ibpam_dst_cookie = tx->tx_cookie; |
| 1773 | |
| 1774 | kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_ACK, nob); |
| 1775 | |
| 1776 | tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */ |
| 1777 | tx->tx_waiting = 1; /* waiting for PUT_DONE */ |
| 1778 | kiblnd_queue_tx(tx, conn); |
| 1779 | |
| 1780 | /* reposted buffer reserved for PUT_DONE */ |
| 1781 | post_credit = IBLND_POSTRX_NO_CREDIT; |
| 1782 | break; |
| 1783 | |
| 1784 | case IBLND_MSG_GET_REQ: |
| 1785 | if (lntmsg != NULL) { |
| 1786 | /* Optimized GET; RDMA lntmsg's payload */ |
| 1787 | kiblnd_reply(ni, rx, lntmsg); |
| 1788 | } else { |
| 1789 | /* GET didn't match anything */ |
| 1790 | kiblnd_send_completion(rx->rx_conn, IBLND_MSG_GET_DONE, |
| 1791 | -ENODATA, |
| 1792 | rxmsg->ibm_u.get.ibgm_cookie); |
| 1793 | } |
| 1794 | break; |
| 1795 | } |
| 1796 | |
| 1797 | kiblnd_post_rx(rx, post_credit); |
| 1798 | return rc; |
| 1799 | } |
| 1800 | |
| 1801 | int |
| 1802 | kiblnd_thread_start(int (*fn)(void *arg), void *arg, char *name) |
| 1803 | { |
Kees Cook | 9edf0f6 | 2013-09-10 21:37:19 -0700 | [diff] [blame] | 1804 | struct task_struct *task = kthread_run(fn, arg, "%s", name); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1805 | |
| 1806 | if (IS_ERR(task)) |
| 1807 | return PTR_ERR(task); |
| 1808 | |
| 1809 | atomic_inc(&kiblnd_data.kib_nthreads); |
| 1810 | return 0; |
| 1811 | } |
| 1812 | |
| 1813 | void |
| 1814 | kiblnd_thread_fini (void) |
| 1815 | { |
| 1816 | atomic_dec (&kiblnd_data.kib_nthreads); |
| 1817 | } |
| 1818 | |
| 1819 | void |
| 1820 | kiblnd_peer_alive (kib_peer_t *peer) |
| 1821 | { |
| 1822 | /* This is racy, but everyone's only writing cfs_time_current() */ |
| 1823 | peer->ibp_last_alive = cfs_time_current(); |
| 1824 | mb(); |
| 1825 | } |
| 1826 | |
| 1827 | void |
| 1828 | kiblnd_peer_notify (kib_peer_t *peer) |
| 1829 | { |
| 1830 | int error = 0; |
| 1831 | cfs_time_t last_alive = 0; |
| 1832 | unsigned long flags; |
| 1833 | |
| 1834 | read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| 1835 | |
| 1836 | if (list_empty(&peer->ibp_conns) && |
| 1837 | peer->ibp_accepting == 0 && |
| 1838 | peer->ibp_connecting == 0 && |
| 1839 | peer->ibp_error != 0) { |
| 1840 | error = peer->ibp_error; |
| 1841 | peer->ibp_error = 0; |
| 1842 | |
| 1843 | last_alive = peer->ibp_last_alive; |
| 1844 | } |
| 1845 | |
| 1846 | read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| 1847 | |
| 1848 | if (error != 0) |
| 1849 | lnet_notify(peer->ibp_ni, |
| 1850 | peer->ibp_nid, 0, last_alive); |
| 1851 | } |
| 1852 | |
| 1853 | void |
| 1854 | kiblnd_close_conn_locked (kib_conn_t *conn, int error) |
| 1855 | { |
| 1856 | /* This just does the immediate housekeeping. 'error' is zero for a |
| 1857 | * normal shutdown which can happen only after the connection has been |
| 1858 | * established. If the connection is established, schedule the |
| 1859 | * connection to be finished off by the connd. Otherwise the connd is |
| 1860 | * already dealing with it (either to set it up or tear it down). |
| 1861 | * Caller holds kib_global_lock exclusively in irq context */ |
| 1862 | kib_peer_t *peer = conn->ibc_peer; |
| 1863 | kib_dev_t *dev; |
| 1864 | unsigned long flags; |
| 1865 | |
| 1866 | LASSERT (error != 0 || conn->ibc_state >= IBLND_CONN_ESTABLISHED); |
| 1867 | |
| 1868 | if (error != 0 && conn->ibc_comms_error == 0) |
| 1869 | conn->ibc_comms_error = error; |
| 1870 | |
| 1871 | if (conn->ibc_state != IBLND_CONN_ESTABLISHED) |
| 1872 | return; /* already being handled */ |
| 1873 | |
| 1874 | if (error == 0 && |
| 1875 | list_empty(&conn->ibc_tx_noops) && |
| 1876 | list_empty(&conn->ibc_tx_queue) && |
| 1877 | list_empty(&conn->ibc_tx_queue_rsrvd) && |
| 1878 | list_empty(&conn->ibc_tx_queue_nocred) && |
| 1879 | list_empty(&conn->ibc_active_txs)) { |
| 1880 | CDEBUG(D_NET, "closing conn to %s\n", |
| 1881 | libcfs_nid2str(peer->ibp_nid)); |
| 1882 | } else { |
| 1883 | CNETERR("Closing conn to %s: error %d%s%s%s%s%s\n", |
| 1884 | libcfs_nid2str(peer->ibp_nid), error, |
| 1885 | list_empty(&conn->ibc_tx_queue) ? "" : "(sending)", |
| 1886 | list_empty(&conn->ibc_tx_noops) ? "" : "(sending_noops)", |
| 1887 | list_empty(&conn->ibc_tx_queue_rsrvd) ? "" : "(sending_rsrvd)", |
| 1888 | list_empty(&conn->ibc_tx_queue_nocred) ? "" : "(sending_nocred)", |
| 1889 | list_empty(&conn->ibc_active_txs) ? "" : "(waiting)"); |
| 1890 | } |
| 1891 | |
| 1892 | dev = ((kib_net_t *)peer->ibp_ni->ni_data)->ibn_dev; |
| 1893 | list_del(&conn->ibc_list); |
| 1894 | /* connd (see below) takes over ibc_list's ref */ |
| 1895 | |
| 1896 | if (list_empty (&peer->ibp_conns) && /* no more conns */ |
| 1897 | kiblnd_peer_active(peer)) { /* still in peer table */ |
| 1898 | kiblnd_unlink_peer_locked(peer); |
| 1899 | |
| 1900 | /* set/clear error on last conn */ |
| 1901 | peer->ibp_error = conn->ibc_comms_error; |
| 1902 | } |
| 1903 | |
| 1904 | kiblnd_set_conn_state(conn, IBLND_CONN_CLOSING); |
| 1905 | |
| 1906 | if (error != 0 && |
| 1907 | kiblnd_dev_can_failover(dev)) { |
| 1908 | list_add_tail(&dev->ibd_fail_list, |
| 1909 | &kiblnd_data.kib_failed_devs); |
| 1910 | wake_up(&kiblnd_data.kib_failover_waitq); |
| 1911 | } |
| 1912 | |
| 1913 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| 1914 | |
| 1915 | list_add_tail(&conn->ibc_list, &kiblnd_data.kib_connd_conns); |
| 1916 | wake_up(&kiblnd_data.kib_connd_waitq); |
| 1917 | |
| 1918 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); |
| 1919 | } |
| 1920 | |
| 1921 | void |
| 1922 | kiblnd_close_conn(kib_conn_t *conn, int error) |
| 1923 | { |
| 1924 | unsigned long flags; |
| 1925 | |
| 1926 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| 1927 | |
| 1928 | kiblnd_close_conn_locked(conn, error); |
| 1929 | |
| 1930 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| 1931 | } |
| 1932 | |
| 1933 | void |
| 1934 | kiblnd_handle_early_rxs(kib_conn_t *conn) |
| 1935 | { |
| 1936 | unsigned long flags; |
| 1937 | kib_rx_t *rx; |
| 1938 | |
| 1939 | LASSERT(!in_interrupt()); |
| 1940 | LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED); |
| 1941 | |
| 1942 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| 1943 | while (!list_empty(&conn->ibc_early_rxs)) { |
| 1944 | rx = list_entry(conn->ibc_early_rxs.next, |
| 1945 | kib_rx_t, rx_list); |
| 1946 | list_del(&rx->rx_list); |
| 1947 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| 1948 | |
| 1949 | kiblnd_handle_rx(rx); |
| 1950 | |
| 1951 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| 1952 | } |
| 1953 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| 1954 | } |
| 1955 | |
| 1956 | void |
| 1957 | kiblnd_abort_txs(kib_conn_t *conn, struct list_head *txs) |
| 1958 | { |
| 1959 | LIST_HEAD (zombies); |
| 1960 | struct list_head *tmp; |
| 1961 | struct list_head *nxt; |
| 1962 | kib_tx_t *tx; |
| 1963 | |
| 1964 | spin_lock(&conn->ibc_lock); |
| 1965 | |
| 1966 | list_for_each_safe (tmp, nxt, txs) { |
| 1967 | tx = list_entry (tmp, kib_tx_t, tx_list); |
| 1968 | |
| 1969 | if (txs == &conn->ibc_active_txs) { |
| 1970 | LASSERT (!tx->tx_queued); |
| 1971 | LASSERT (tx->tx_waiting || |
| 1972 | tx->tx_sending != 0); |
| 1973 | } else { |
| 1974 | LASSERT (tx->tx_queued); |
| 1975 | } |
| 1976 | |
| 1977 | tx->tx_status = -ECONNABORTED; |
| 1978 | tx->tx_waiting = 0; |
| 1979 | |
| 1980 | if (tx->tx_sending == 0) { |
| 1981 | tx->tx_queued = 0; |
| 1982 | list_del (&tx->tx_list); |
| 1983 | list_add (&tx->tx_list, &zombies); |
| 1984 | } |
| 1985 | } |
| 1986 | |
| 1987 | spin_unlock(&conn->ibc_lock); |
| 1988 | |
| 1989 | kiblnd_txlist_done(conn->ibc_peer->ibp_ni, &zombies, -ECONNABORTED); |
| 1990 | } |
| 1991 | |
| 1992 | void |
| 1993 | kiblnd_finalise_conn (kib_conn_t *conn) |
| 1994 | { |
| 1995 | LASSERT (!in_interrupt()); |
| 1996 | LASSERT (conn->ibc_state > IBLND_CONN_INIT); |
| 1997 | |
| 1998 | kiblnd_set_conn_state(conn, IBLND_CONN_DISCONNECTED); |
| 1999 | |
| 2000 | /* abort_receives moves QP state to IB_QPS_ERR. This is only required |
| 2001 | * for connections that didn't get as far as being connected, because |
| 2002 | * rdma_disconnect() does this for free. */ |
| 2003 | kiblnd_abort_receives(conn); |
| 2004 | |
| 2005 | /* Complete all tx descs not waiting for sends to complete. |
| 2006 | * NB we should be safe from RDMA now that the QP has changed state */ |
| 2007 | |
| 2008 | kiblnd_abort_txs(conn, &conn->ibc_tx_noops); |
| 2009 | kiblnd_abort_txs(conn, &conn->ibc_tx_queue); |
| 2010 | kiblnd_abort_txs(conn, &conn->ibc_tx_queue_rsrvd); |
| 2011 | kiblnd_abort_txs(conn, &conn->ibc_tx_queue_nocred); |
| 2012 | kiblnd_abort_txs(conn, &conn->ibc_active_txs); |
| 2013 | |
| 2014 | kiblnd_handle_early_rxs(conn); |
| 2015 | } |
| 2016 | |
| 2017 | void |
| 2018 | kiblnd_peer_connect_failed (kib_peer_t *peer, int active, int error) |
| 2019 | { |
| 2020 | LIST_HEAD (zombies); |
| 2021 | unsigned long flags; |
| 2022 | |
| 2023 | LASSERT (error != 0); |
| 2024 | LASSERT (!in_interrupt()); |
| 2025 | |
| 2026 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| 2027 | |
| 2028 | if (active) { |
| 2029 | LASSERT (peer->ibp_connecting > 0); |
| 2030 | peer->ibp_connecting--; |
| 2031 | } else { |
| 2032 | LASSERT (peer->ibp_accepting > 0); |
| 2033 | peer->ibp_accepting--; |
| 2034 | } |
| 2035 | |
| 2036 | if (peer->ibp_connecting != 0 || |
| 2037 | peer->ibp_accepting != 0) { |
| 2038 | /* another connection attempt under way... */ |
| 2039 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, |
| 2040 | flags); |
| 2041 | return; |
| 2042 | } |
| 2043 | |
| 2044 | if (list_empty(&peer->ibp_conns)) { |
| 2045 | /* Take peer's blocked transmits to complete with error */ |
| 2046 | list_add(&zombies, &peer->ibp_tx_queue); |
| 2047 | list_del_init(&peer->ibp_tx_queue); |
| 2048 | |
| 2049 | if (kiblnd_peer_active(peer)) |
| 2050 | kiblnd_unlink_peer_locked(peer); |
| 2051 | |
| 2052 | peer->ibp_error = error; |
| 2053 | } else { |
| 2054 | /* Can't have blocked transmits if there are connections */ |
| 2055 | LASSERT (list_empty(&peer->ibp_tx_queue)); |
| 2056 | } |
| 2057 | |
| 2058 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| 2059 | |
| 2060 | kiblnd_peer_notify(peer); |
| 2061 | |
| 2062 | if (list_empty (&zombies)) |
| 2063 | return; |
| 2064 | |
| 2065 | CNETERR("Deleting messages for %s: connection failed\n", |
| 2066 | libcfs_nid2str(peer->ibp_nid)); |
| 2067 | |
| 2068 | kiblnd_txlist_done(peer->ibp_ni, &zombies, -EHOSTUNREACH); |
| 2069 | } |
| 2070 | |
| 2071 | void |
| 2072 | kiblnd_connreq_done(kib_conn_t *conn, int status) |
| 2073 | { |
| 2074 | kib_peer_t *peer = conn->ibc_peer; |
| 2075 | kib_tx_t *tx; |
| 2076 | struct list_head txs; |
| 2077 | unsigned long flags; |
| 2078 | int active; |
| 2079 | |
| 2080 | active = (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); |
| 2081 | |
| 2082 | CDEBUG(D_NET,"%s: active(%d), version(%x), status(%d)\n", |
| 2083 | libcfs_nid2str(peer->ibp_nid), active, |
| 2084 | conn->ibc_version, status); |
| 2085 | |
| 2086 | LASSERT (!in_interrupt()); |
| 2087 | LASSERT ((conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT && |
| 2088 | peer->ibp_connecting > 0) || |
| 2089 | (conn->ibc_state == IBLND_CONN_PASSIVE_WAIT && |
| 2090 | peer->ibp_accepting > 0)); |
| 2091 | |
| 2092 | LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars)); |
| 2093 | conn->ibc_connvars = NULL; |
| 2094 | |
| 2095 | if (status != 0) { |
| 2096 | /* failed to establish connection */ |
| 2097 | kiblnd_peer_connect_failed(peer, active, status); |
| 2098 | kiblnd_finalise_conn(conn); |
| 2099 | return; |
| 2100 | } |
| 2101 | |
| 2102 | /* connection established */ |
| 2103 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| 2104 | |
| 2105 | conn->ibc_last_send = jiffies; |
| 2106 | kiblnd_set_conn_state(conn, IBLND_CONN_ESTABLISHED); |
| 2107 | kiblnd_peer_alive(peer); |
| 2108 | |
| 2109 | /* Add conn to peer's list and nuke any dangling conns from a different |
| 2110 | * peer instance... */ |
| 2111 | kiblnd_conn_addref(conn); /* +1 ref for ibc_list */ |
| 2112 | list_add(&conn->ibc_list, &peer->ibp_conns); |
| 2113 | if (active) |
| 2114 | peer->ibp_connecting--; |
| 2115 | else |
| 2116 | peer->ibp_accepting--; |
| 2117 | |
| 2118 | if (peer->ibp_version == 0) { |
| 2119 | peer->ibp_version = conn->ibc_version; |
| 2120 | peer->ibp_incarnation = conn->ibc_incarnation; |
| 2121 | } |
| 2122 | |
| 2123 | if (peer->ibp_version != conn->ibc_version || |
| 2124 | peer->ibp_incarnation != conn->ibc_incarnation) { |
| 2125 | kiblnd_close_stale_conns_locked(peer, conn->ibc_version, |
| 2126 | conn->ibc_incarnation); |
| 2127 | peer->ibp_version = conn->ibc_version; |
| 2128 | peer->ibp_incarnation = conn->ibc_incarnation; |
| 2129 | } |
| 2130 | |
| 2131 | /* grab pending txs while I have the lock */ |
| 2132 | list_add(&txs, &peer->ibp_tx_queue); |
| 2133 | list_del_init(&peer->ibp_tx_queue); |
| 2134 | |
| 2135 | if (!kiblnd_peer_active(peer) || /* peer has been deleted */ |
| 2136 | conn->ibc_comms_error != 0) { /* error has happened already */ |
| 2137 | lnet_ni_t *ni = peer->ibp_ni; |
| 2138 | |
| 2139 | /* start to shut down connection */ |
| 2140 | kiblnd_close_conn_locked(conn, -ECONNABORTED); |
| 2141 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| 2142 | |
| 2143 | kiblnd_txlist_done(ni, &txs, -ECONNABORTED); |
| 2144 | |
| 2145 | return; |
| 2146 | } |
| 2147 | |
| 2148 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| 2149 | |
| 2150 | /* Schedule blocked txs */ |
| 2151 | spin_lock(&conn->ibc_lock); |
| 2152 | while (!list_empty(&txs)) { |
| 2153 | tx = list_entry(txs.next, kib_tx_t, tx_list); |
| 2154 | list_del(&tx->tx_list); |
| 2155 | |
| 2156 | kiblnd_queue_tx_locked(tx, conn); |
| 2157 | } |
| 2158 | spin_unlock(&conn->ibc_lock); |
| 2159 | |
| 2160 | kiblnd_check_sends(conn); |
| 2161 | |
| 2162 | /* schedule blocked rxs */ |
| 2163 | kiblnd_handle_early_rxs(conn); |
| 2164 | } |
| 2165 | |
| 2166 | void |
| 2167 | kiblnd_reject(struct rdma_cm_id *cmid, kib_rej_t *rej) |
| 2168 | { |
| 2169 | int rc; |
| 2170 | |
| 2171 | rc = rdma_reject(cmid, rej, sizeof(*rej)); |
| 2172 | |
| 2173 | if (rc != 0) |
| 2174 | CWARN("Error %d sending reject\n", rc); |
| 2175 | } |
| 2176 | |
| 2177 | int |
| 2178 | kiblnd_passive_connect (struct rdma_cm_id *cmid, void *priv, int priv_nob) |
| 2179 | { |
| 2180 | rwlock_t *g_lock = &kiblnd_data.kib_global_lock; |
| 2181 | kib_msg_t *reqmsg = priv; |
| 2182 | kib_msg_t *ackmsg; |
| 2183 | kib_dev_t *ibdev; |
| 2184 | kib_peer_t *peer; |
| 2185 | kib_peer_t *peer2; |
| 2186 | kib_conn_t *conn; |
| 2187 | lnet_ni_t *ni = NULL; |
| 2188 | kib_net_t *net = NULL; |
| 2189 | lnet_nid_t nid; |
| 2190 | struct rdma_conn_param cp; |
| 2191 | kib_rej_t rej; |
| 2192 | int version = IBLND_MSG_VERSION; |
| 2193 | unsigned long flags; |
| 2194 | int rc; |
| 2195 | struct sockaddr_in *peer_addr; |
| 2196 | LASSERT (!in_interrupt()); |
| 2197 | |
| 2198 | /* cmid inherits 'context' from the corresponding listener id */ |
| 2199 | ibdev = (kib_dev_t *)cmid->context; |
| 2200 | LASSERT (ibdev != NULL); |
| 2201 | |
| 2202 | memset(&rej, 0, sizeof(rej)); |
| 2203 | rej.ibr_magic = IBLND_MSG_MAGIC; |
| 2204 | rej.ibr_why = IBLND_REJECT_FATAL; |
| 2205 | rej.ibr_cp.ibcp_max_msg_size = IBLND_MSG_SIZE; |
| 2206 | |
| 2207 | peer_addr = (struct sockaddr_in *)&(cmid->route.addr.dst_addr); |
| 2208 | if (*kiblnd_tunables.kib_require_priv_port && |
| 2209 | ntohs(peer_addr->sin_port) >= PROT_SOCK) { |
| 2210 | __u32 ip = ntohl(peer_addr->sin_addr.s_addr); |
Peng Tao | 5e8f692 | 2013-07-15 22:27:09 +0800 | [diff] [blame] | 2211 | CERROR("Peer's port (%pI4h:%hu) is not privileged\n", |
| 2212 | &ip, ntohs(peer_addr->sin_port)); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2213 | goto failed; |
| 2214 | } |
| 2215 | |
| 2216 | if (priv_nob < offsetof(kib_msg_t, ibm_type)) { |
| 2217 | CERROR("Short connection request\n"); |
| 2218 | goto failed; |
| 2219 | } |
| 2220 | |
| 2221 | /* Future protocol version compatibility support! If the |
| 2222 | * o2iblnd-specific protocol changes, or when LNET unifies |
| 2223 | * protocols over all LNDs, the initial connection will |
| 2224 | * negotiate a protocol version. I trap this here to avoid |
| 2225 | * console errors; the reject tells the peer which protocol I |
| 2226 | * speak. */ |
| 2227 | if (reqmsg->ibm_magic == LNET_PROTO_MAGIC || |
| 2228 | reqmsg->ibm_magic == __swab32(LNET_PROTO_MAGIC)) |
| 2229 | goto failed; |
| 2230 | if (reqmsg->ibm_magic == IBLND_MSG_MAGIC && |
| 2231 | reqmsg->ibm_version != IBLND_MSG_VERSION && |
| 2232 | reqmsg->ibm_version != IBLND_MSG_VERSION_1) |
| 2233 | goto failed; |
| 2234 | if (reqmsg->ibm_magic == __swab32(IBLND_MSG_MAGIC) && |
| 2235 | reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION) && |
| 2236 | reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION_1)) |
| 2237 | goto failed; |
| 2238 | |
| 2239 | rc = kiblnd_unpack_msg(reqmsg, priv_nob); |
| 2240 | if (rc != 0) { |
| 2241 | CERROR("Can't parse connection request: %d\n", rc); |
| 2242 | goto failed; |
| 2243 | } |
| 2244 | |
| 2245 | nid = reqmsg->ibm_srcnid; |
| 2246 | ni = lnet_net2ni(LNET_NIDNET(reqmsg->ibm_dstnid)); |
| 2247 | |
| 2248 | if (ni != NULL) { |
| 2249 | net = (kib_net_t *)ni->ni_data; |
| 2250 | rej.ibr_incarnation = net->ibn_incarnation; |
| 2251 | } |
| 2252 | |
| 2253 | if (ni == NULL || /* no matching net */ |
| 2254 | ni->ni_nid != reqmsg->ibm_dstnid || /* right NET, wrong NID! */ |
| 2255 | net->ibn_dev != ibdev) { /* wrong device */ |
Peng Tao | 5e8f692 | 2013-07-15 22:27:09 +0800 | [diff] [blame] | 2256 | CERROR("Can't accept %s on %s (%s:%d:%pI4h): " |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2257 | "bad dst nid %s\n", libcfs_nid2str(nid), |
| 2258 | ni == NULL ? "NA" : libcfs_nid2str(ni->ni_nid), |
| 2259 | ibdev->ibd_ifname, ibdev->ibd_nnets, |
Peng Tao | 5e8f692 | 2013-07-15 22:27:09 +0800 | [diff] [blame] | 2260 | &ibdev->ibd_ifip, |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2261 | libcfs_nid2str(reqmsg->ibm_dstnid)); |
| 2262 | |
| 2263 | goto failed; |
| 2264 | } |
| 2265 | |
| 2266 | /* check time stamp as soon as possible */ |
| 2267 | if (reqmsg->ibm_dststamp != 0 && |
| 2268 | reqmsg->ibm_dststamp != net->ibn_incarnation) { |
| 2269 | CWARN("Stale connection request\n"); |
| 2270 | rej.ibr_why = IBLND_REJECT_CONN_STALE; |
| 2271 | goto failed; |
| 2272 | } |
| 2273 | |
| 2274 | /* I can accept peer's version */ |
| 2275 | version = reqmsg->ibm_version; |
| 2276 | |
| 2277 | if (reqmsg->ibm_type != IBLND_MSG_CONNREQ) { |
| 2278 | CERROR("Unexpected connreq msg type: %x from %s\n", |
| 2279 | reqmsg->ibm_type, libcfs_nid2str(nid)); |
| 2280 | goto failed; |
| 2281 | } |
| 2282 | |
| 2283 | if (reqmsg->ibm_u.connparams.ibcp_queue_depth != |
| 2284 | IBLND_MSG_QUEUE_SIZE(version)) { |
| 2285 | CERROR("Can't accept %s: incompatible queue depth %d (%d wanted)\n", |
| 2286 | libcfs_nid2str(nid), reqmsg->ibm_u.connparams.ibcp_queue_depth, |
| 2287 | IBLND_MSG_QUEUE_SIZE(version)); |
| 2288 | |
| 2289 | if (version == IBLND_MSG_VERSION) |
| 2290 | rej.ibr_why = IBLND_REJECT_MSG_QUEUE_SIZE; |
| 2291 | |
| 2292 | goto failed; |
| 2293 | } |
| 2294 | |
| 2295 | if (reqmsg->ibm_u.connparams.ibcp_max_frags != |
| 2296 | IBLND_RDMA_FRAGS(version)) { |
| 2297 | CERROR("Can't accept %s(version %x): " |
| 2298 | "incompatible max_frags %d (%d wanted)\n", |
| 2299 | libcfs_nid2str(nid), version, |
| 2300 | reqmsg->ibm_u.connparams.ibcp_max_frags, |
| 2301 | IBLND_RDMA_FRAGS(version)); |
| 2302 | |
| 2303 | if (version == IBLND_MSG_VERSION) |
| 2304 | rej.ibr_why = IBLND_REJECT_RDMA_FRAGS; |
| 2305 | |
| 2306 | goto failed; |
| 2307 | |
| 2308 | } |
| 2309 | |
| 2310 | if (reqmsg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) { |
| 2311 | CERROR("Can't accept %s: message size %d too big (%d max)\n", |
| 2312 | libcfs_nid2str(nid), |
| 2313 | reqmsg->ibm_u.connparams.ibcp_max_msg_size, |
| 2314 | IBLND_MSG_SIZE); |
| 2315 | goto failed; |
| 2316 | } |
| 2317 | |
| 2318 | /* assume 'nid' is a new peer; create */ |
| 2319 | rc = kiblnd_create_peer(ni, &peer, nid); |
| 2320 | if (rc != 0) { |
| 2321 | CERROR("Can't create peer for %s\n", libcfs_nid2str(nid)); |
| 2322 | rej.ibr_why = IBLND_REJECT_NO_RESOURCES; |
| 2323 | goto failed; |
| 2324 | } |
| 2325 | |
| 2326 | write_lock_irqsave(g_lock, flags); |
| 2327 | |
| 2328 | peer2 = kiblnd_find_peer_locked(nid); |
| 2329 | if (peer2 != NULL) { |
| 2330 | if (peer2->ibp_version == 0) { |
| 2331 | peer2->ibp_version = version; |
| 2332 | peer2->ibp_incarnation = reqmsg->ibm_srcstamp; |
| 2333 | } |
| 2334 | |
| 2335 | /* not the guy I've talked with */ |
| 2336 | if (peer2->ibp_incarnation != reqmsg->ibm_srcstamp || |
| 2337 | peer2->ibp_version != version) { |
| 2338 | kiblnd_close_peer_conns_locked(peer2, -ESTALE); |
| 2339 | write_unlock_irqrestore(g_lock, flags); |
| 2340 | |
| 2341 | CWARN("Conn stale %s [old ver: %x, new ver: %x]\n", |
| 2342 | libcfs_nid2str(nid), peer2->ibp_version, version); |
| 2343 | |
| 2344 | kiblnd_peer_decref(peer); |
| 2345 | rej.ibr_why = IBLND_REJECT_CONN_STALE; |
| 2346 | goto failed; |
| 2347 | } |
| 2348 | |
| 2349 | /* tie-break connection race in favour of the higher NID */ |
| 2350 | if (peer2->ibp_connecting != 0 && |
| 2351 | nid < ni->ni_nid) { |
| 2352 | write_unlock_irqrestore(g_lock, flags); |
| 2353 | |
| 2354 | CWARN("Conn race %s\n", libcfs_nid2str(peer2->ibp_nid)); |
| 2355 | |
| 2356 | kiblnd_peer_decref(peer); |
| 2357 | rej.ibr_why = IBLND_REJECT_CONN_RACE; |
| 2358 | goto failed; |
| 2359 | } |
| 2360 | |
| 2361 | peer2->ibp_accepting++; |
| 2362 | kiblnd_peer_addref(peer2); |
| 2363 | |
| 2364 | write_unlock_irqrestore(g_lock, flags); |
| 2365 | kiblnd_peer_decref(peer); |
| 2366 | peer = peer2; |
| 2367 | } else { |
| 2368 | /* Brand new peer */ |
| 2369 | LASSERT (peer->ibp_accepting == 0); |
| 2370 | LASSERT (peer->ibp_version == 0 && |
| 2371 | peer->ibp_incarnation == 0); |
| 2372 | |
| 2373 | peer->ibp_accepting = 1; |
| 2374 | peer->ibp_version = version; |
| 2375 | peer->ibp_incarnation = reqmsg->ibm_srcstamp; |
| 2376 | |
| 2377 | /* I have a ref on ni that prevents it being shutdown */ |
| 2378 | LASSERT (net->ibn_shutdown == 0); |
| 2379 | |
| 2380 | kiblnd_peer_addref(peer); |
| 2381 | list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid)); |
| 2382 | |
| 2383 | write_unlock_irqrestore(g_lock, flags); |
| 2384 | } |
| 2385 | |
| 2386 | conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_PASSIVE_WAIT, version); |
| 2387 | if (conn == NULL) { |
| 2388 | kiblnd_peer_connect_failed(peer, 0, -ENOMEM); |
| 2389 | kiblnd_peer_decref(peer); |
| 2390 | rej.ibr_why = IBLND_REJECT_NO_RESOURCES; |
| 2391 | goto failed; |
| 2392 | } |
| 2393 | |
| 2394 | /* conn now "owns" cmid, so I return success from here on to ensure the |
| 2395 | * CM callback doesn't destroy cmid. */ |
| 2396 | |
| 2397 | conn->ibc_incarnation = reqmsg->ibm_srcstamp; |
| 2398 | conn->ibc_credits = IBLND_MSG_QUEUE_SIZE(version); |
| 2399 | conn->ibc_reserved_credits = IBLND_MSG_QUEUE_SIZE(version); |
| 2400 | LASSERT (conn->ibc_credits + conn->ibc_reserved_credits + IBLND_OOB_MSGS(version) |
| 2401 | <= IBLND_RX_MSGS(version)); |
| 2402 | |
| 2403 | ackmsg = &conn->ibc_connvars->cv_msg; |
| 2404 | memset(ackmsg, 0, sizeof(*ackmsg)); |
| 2405 | |
| 2406 | kiblnd_init_msg(ackmsg, IBLND_MSG_CONNACK, |
| 2407 | sizeof(ackmsg->ibm_u.connparams)); |
| 2408 | ackmsg->ibm_u.connparams.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version); |
| 2409 | ackmsg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE; |
| 2410 | ackmsg->ibm_u.connparams.ibcp_max_frags = IBLND_RDMA_FRAGS(version); |
| 2411 | |
| 2412 | kiblnd_pack_msg(ni, ackmsg, version, 0, nid, reqmsg->ibm_srcstamp); |
| 2413 | |
| 2414 | memset(&cp, 0, sizeof(cp)); |
| 2415 | cp.private_data = ackmsg; |
| 2416 | cp.private_data_len = ackmsg->ibm_nob; |
| 2417 | cp.responder_resources = 0; /* No atomic ops or RDMA reads */ |
| 2418 | cp.initiator_depth = 0; |
| 2419 | cp.flow_control = 1; |
| 2420 | cp.retry_count = *kiblnd_tunables.kib_retry_count; |
| 2421 | cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count; |
| 2422 | |
| 2423 | CDEBUG(D_NET, "Accept %s\n", libcfs_nid2str(nid)); |
| 2424 | |
| 2425 | rc = rdma_accept(cmid, &cp); |
| 2426 | if (rc != 0) { |
| 2427 | CERROR("Can't accept %s: %d\n", libcfs_nid2str(nid), rc); |
| 2428 | rej.ibr_version = version; |
| 2429 | rej.ibr_why = IBLND_REJECT_FATAL; |
| 2430 | |
| 2431 | kiblnd_reject(cmid, &rej); |
| 2432 | kiblnd_connreq_done(conn, rc); |
| 2433 | kiblnd_conn_decref(conn); |
| 2434 | } |
| 2435 | |
| 2436 | lnet_ni_decref(ni); |
| 2437 | return 0; |
| 2438 | |
| 2439 | failed: |
| 2440 | if (ni != NULL) |
| 2441 | lnet_ni_decref(ni); |
| 2442 | |
| 2443 | rej.ibr_version = version; |
| 2444 | rej.ibr_cp.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version); |
| 2445 | rej.ibr_cp.ibcp_max_frags = IBLND_RDMA_FRAGS(version); |
| 2446 | kiblnd_reject(cmid, &rej); |
| 2447 | |
| 2448 | return -ECONNREFUSED; |
| 2449 | } |
| 2450 | |
| 2451 | void |
| 2452 | kiblnd_reconnect (kib_conn_t *conn, int version, |
| 2453 | __u64 incarnation, int why, kib_connparams_t *cp) |
| 2454 | { |
| 2455 | kib_peer_t *peer = conn->ibc_peer; |
| 2456 | char *reason; |
| 2457 | int retry = 0; |
| 2458 | unsigned long flags; |
| 2459 | |
| 2460 | LASSERT (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); |
| 2461 | LASSERT (peer->ibp_connecting > 0); /* 'conn' at least */ |
| 2462 | |
| 2463 | write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| 2464 | |
| 2465 | /* retry connection if it's still needed and no other connection |
| 2466 | * attempts (active or passive) are in progress |
| 2467 | * NB: reconnect is still needed even when ibp_tx_queue is |
| 2468 | * empty if ibp_version != version because reconnect may be |
| 2469 | * initiated by kiblnd_query() */ |
| 2470 | if ((!list_empty(&peer->ibp_tx_queue) || |
| 2471 | peer->ibp_version != version) && |
| 2472 | peer->ibp_connecting == 1 && |
| 2473 | peer->ibp_accepting == 0) { |
| 2474 | retry = 1; |
| 2475 | peer->ibp_connecting++; |
| 2476 | |
| 2477 | peer->ibp_version = version; |
| 2478 | peer->ibp_incarnation = incarnation; |
| 2479 | } |
| 2480 | |
| 2481 | write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| 2482 | |
| 2483 | if (!retry) |
| 2484 | return; |
| 2485 | |
| 2486 | switch (why) { |
| 2487 | default: |
| 2488 | reason = "Unknown"; |
| 2489 | break; |
| 2490 | |
| 2491 | case IBLND_REJECT_CONN_STALE: |
| 2492 | reason = "stale"; |
| 2493 | break; |
| 2494 | |
| 2495 | case IBLND_REJECT_CONN_RACE: |
| 2496 | reason = "conn race"; |
| 2497 | break; |
| 2498 | |
| 2499 | case IBLND_REJECT_CONN_UNCOMPAT: |
| 2500 | reason = "version negotiation"; |
| 2501 | break; |
| 2502 | } |
| 2503 | |
| 2504 | CNETERR("%s: retrying (%s), %x, %x, " |
| 2505 | "queue_dep: %d, max_frag: %d, msg_size: %d\n", |
| 2506 | libcfs_nid2str(peer->ibp_nid), |
| 2507 | reason, IBLND_MSG_VERSION, version, |
| 2508 | cp != NULL? cp->ibcp_queue_depth :IBLND_MSG_QUEUE_SIZE(version), |
| 2509 | cp != NULL? cp->ibcp_max_frags : IBLND_RDMA_FRAGS(version), |
| 2510 | cp != NULL? cp->ibcp_max_msg_size: IBLND_MSG_SIZE); |
| 2511 | |
| 2512 | kiblnd_connect_peer(peer); |
| 2513 | } |
| 2514 | |
| 2515 | void |
| 2516 | kiblnd_rejected (kib_conn_t *conn, int reason, void *priv, int priv_nob) |
| 2517 | { |
| 2518 | kib_peer_t *peer = conn->ibc_peer; |
| 2519 | |
| 2520 | LASSERT (!in_interrupt()); |
| 2521 | LASSERT (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); |
| 2522 | |
| 2523 | switch (reason) { |
| 2524 | case IB_CM_REJ_STALE_CONN: |
| 2525 | kiblnd_reconnect(conn, IBLND_MSG_VERSION, 0, |
| 2526 | IBLND_REJECT_CONN_STALE, NULL); |
| 2527 | break; |
| 2528 | |
| 2529 | case IB_CM_REJ_INVALID_SERVICE_ID: |
| 2530 | CNETERR("%s rejected: no listener at %d\n", |
| 2531 | libcfs_nid2str(peer->ibp_nid), |
| 2532 | *kiblnd_tunables.kib_service); |
| 2533 | break; |
| 2534 | |
| 2535 | case IB_CM_REJ_CONSUMER_DEFINED: |
| 2536 | if (priv_nob >= offsetof(kib_rej_t, ibr_padding)) { |
| 2537 | kib_rej_t *rej = priv; |
| 2538 | kib_connparams_t *cp = NULL; |
| 2539 | int flip = 0; |
| 2540 | __u64 incarnation = -1; |
| 2541 | |
| 2542 | /* NB. default incarnation is -1 because: |
| 2543 | * a) V1 will ignore dst incarnation in connreq. |
| 2544 | * b) V2 will provide incarnation while rejecting me, |
| 2545 | * -1 will be overwrote. |
| 2546 | * |
| 2547 | * if I try to connect to a V1 peer with V2 protocol, |
| 2548 | * it rejected me then upgrade to V2, I have no idea |
| 2549 | * about the upgrading and try to reconnect with V1, |
| 2550 | * in this case upgraded V2 can find out I'm trying to |
| 2551 | * talk to the old guy and reject me(incarnation is -1). |
| 2552 | */ |
| 2553 | |
| 2554 | if (rej->ibr_magic == __swab32(IBLND_MSG_MAGIC) || |
| 2555 | rej->ibr_magic == __swab32(LNET_PROTO_MAGIC)) { |
| 2556 | __swab32s(&rej->ibr_magic); |
| 2557 | __swab16s(&rej->ibr_version); |
| 2558 | flip = 1; |
| 2559 | } |
| 2560 | |
| 2561 | if (priv_nob >= sizeof(kib_rej_t) && |
| 2562 | rej->ibr_version > IBLND_MSG_VERSION_1) { |
| 2563 | /* priv_nob is always 148 in current version |
| 2564 | * of OFED, so we still need to check version. |
| 2565 | * (define of IB_CM_REJ_PRIVATE_DATA_SIZE) */ |
| 2566 | cp = &rej->ibr_cp; |
| 2567 | |
| 2568 | if (flip) { |
| 2569 | __swab64s(&rej->ibr_incarnation); |
| 2570 | __swab16s(&cp->ibcp_queue_depth); |
| 2571 | __swab16s(&cp->ibcp_max_frags); |
| 2572 | __swab32s(&cp->ibcp_max_msg_size); |
| 2573 | } |
| 2574 | |
| 2575 | incarnation = rej->ibr_incarnation; |
| 2576 | } |
| 2577 | |
| 2578 | if (rej->ibr_magic != IBLND_MSG_MAGIC && |
| 2579 | rej->ibr_magic != LNET_PROTO_MAGIC) { |
| 2580 | CERROR("%s rejected: consumer defined fatal error\n", |
| 2581 | libcfs_nid2str(peer->ibp_nid)); |
| 2582 | break; |
| 2583 | } |
| 2584 | |
| 2585 | if (rej->ibr_version != IBLND_MSG_VERSION && |
| 2586 | rej->ibr_version != IBLND_MSG_VERSION_1) { |
| 2587 | CERROR("%s rejected: o2iblnd version %x error\n", |
| 2588 | libcfs_nid2str(peer->ibp_nid), |
| 2589 | rej->ibr_version); |
| 2590 | break; |
| 2591 | } |
| 2592 | |
| 2593 | if (rej->ibr_why == IBLND_REJECT_FATAL && |
| 2594 | rej->ibr_version == IBLND_MSG_VERSION_1) { |
| 2595 | CDEBUG(D_NET, "rejected by old version peer %s: %x\n", |
| 2596 | libcfs_nid2str(peer->ibp_nid), rej->ibr_version); |
| 2597 | |
| 2598 | if (conn->ibc_version != IBLND_MSG_VERSION_1) |
| 2599 | rej->ibr_why = IBLND_REJECT_CONN_UNCOMPAT; |
| 2600 | } |
| 2601 | |
| 2602 | switch (rej->ibr_why) { |
| 2603 | case IBLND_REJECT_CONN_RACE: |
| 2604 | case IBLND_REJECT_CONN_STALE: |
| 2605 | case IBLND_REJECT_CONN_UNCOMPAT: |
| 2606 | kiblnd_reconnect(conn, rej->ibr_version, |
| 2607 | incarnation, rej->ibr_why, cp); |
| 2608 | break; |
| 2609 | |
| 2610 | case IBLND_REJECT_MSG_QUEUE_SIZE: |
| 2611 | CERROR("%s rejected: incompatible message queue depth %d, %d\n", |
| 2612 | libcfs_nid2str(peer->ibp_nid), cp->ibcp_queue_depth, |
| 2613 | IBLND_MSG_QUEUE_SIZE(conn->ibc_version)); |
| 2614 | break; |
| 2615 | |
| 2616 | case IBLND_REJECT_RDMA_FRAGS: |
| 2617 | CERROR("%s rejected: incompatible # of RDMA fragments %d, %d\n", |
| 2618 | libcfs_nid2str(peer->ibp_nid), cp->ibcp_max_frags, |
| 2619 | IBLND_RDMA_FRAGS(conn->ibc_version)); |
| 2620 | break; |
| 2621 | |
| 2622 | case IBLND_REJECT_NO_RESOURCES: |
| 2623 | CERROR("%s rejected: o2iblnd no resources\n", |
| 2624 | libcfs_nid2str(peer->ibp_nid)); |
| 2625 | break; |
| 2626 | |
| 2627 | case IBLND_REJECT_FATAL: |
| 2628 | CERROR("%s rejected: o2iblnd fatal error\n", |
| 2629 | libcfs_nid2str(peer->ibp_nid)); |
| 2630 | break; |
| 2631 | |
| 2632 | default: |
| 2633 | CERROR("%s rejected: o2iblnd reason %d\n", |
| 2634 | libcfs_nid2str(peer->ibp_nid), |
| 2635 | rej->ibr_why); |
| 2636 | break; |
| 2637 | } |
| 2638 | break; |
| 2639 | } |
| 2640 | /* fall through */ |
| 2641 | default: |
| 2642 | CNETERR("%s rejected: reason %d, size %d\n", |
| 2643 | libcfs_nid2str(peer->ibp_nid), reason, priv_nob); |
| 2644 | break; |
| 2645 | } |
| 2646 | |
| 2647 | kiblnd_connreq_done(conn, -ECONNREFUSED); |
| 2648 | } |
| 2649 | |
| 2650 | void |
| 2651 | kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob) |
| 2652 | { |
| 2653 | kib_peer_t *peer = conn->ibc_peer; |
| 2654 | lnet_ni_t *ni = peer->ibp_ni; |
| 2655 | kib_net_t *net = ni->ni_data; |
| 2656 | kib_msg_t *msg = priv; |
| 2657 | int ver = conn->ibc_version; |
| 2658 | int rc = kiblnd_unpack_msg(msg, priv_nob); |
| 2659 | unsigned long flags; |
| 2660 | |
| 2661 | LASSERT (net != NULL); |
| 2662 | |
| 2663 | if (rc != 0) { |
| 2664 | CERROR("Can't unpack connack from %s: %d\n", |
| 2665 | libcfs_nid2str(peer->ibp_nid), rc); |
| 2666 | goto failed; |
| 2667 | } |
| 2668 | |
| 2669 | if (msg->ibm_type != IBLND_MSG_CONNACK) { |
| 2670 | CERROR("Unexpected message %d from %s\n", |
| 2671 | msg->ibm_type, libcfs_nid2str(peer->ibp_nid)); |
| 2672 | rc = -EPROTO; |
| 2673 | goto failed; |
| 2674 | } |
| 2675 | |
| 2676 | if (ver != msg->ibm_version) { |
| 2677 | CERROR("%s replied version %x is different with " |
| 2678 | "requested version %x\n", |
| 2679 | libcfs_nid2str(peer->ibp_nid), msg->ibm_version, ver); |
| 2680 | rc = -EPROTO; |
| 2681 | goto failed; |
| 2682 | } |
| 2683 | |
| 2684 | if (msg->ibm_u.connparams.ibcp_queue_depth != |
| 2685 | IBLND_MSG_QUEUE_SIZE(ver)) { |
| 2686 | CERROR("%s has incompatible queue depth %d(%d wanted)\n", |
| 2687 | libcfs_nid2str(peer->ibp_nid), |
| 2688 | msg->ibm_u.connparams.ibcp_queue_depth, |
| 2689 | IBLND_MSG_QUEUE_SIZE(ver)); |
| 2690 | rc = -EPROTO; |
| 2691 | goto failed; |
| 2692 | } |
| 2693 | |
| 2694 | if (msg->ibm_u.connparams.ibcp_max_frags != |
| 2695 | IBLND_RDMA_FRAGS(ver)) { |
| 2696 | CERROR("%s has incompatible max_frags %d (%d wanted)\n", |
| 2697 | libcfs_nid2str(peer->ibp_nid), |
| 2698 | msg->ibm_u.connparams.ibcp_max_frags, |
| 2699 | IBLND_RDMA_FRAGS(ver)); |
| 2700 | rc = -EPROTO; |
| 2701 | goto failed; |
| 2702 | } |
| 2703 | |
| 2704 | if (msg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) { |
| 2705 | CERROR("%s max message size %d too big (%d max)\n", |
| 2706 | libcfs_nid2str(peer->ibp_nid), |
| 2707 | msg->ibm_u.connparams.ibcp_max_msg_size, |
| 2708 | IBLND_MSG_SIZE); |
| 2709 | rc = -EPROTO; |
| 2710 | goto failed; |
| 2711 | } |
| 2712 | |
| 2713 | read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| 2714 | if (msg->ibm_dstnid == ni->ni_nid && |
| 2715 | msg->ibm_dststamp == net->ibn_incarnation) |
| 2716 | rc = 0; |
| 2717 | else |
| 2718 | rc = -ESTALE; |
| 2719 | read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| 2720 | |
| 2721 | if (rc != 0) { |
| 2722 | CERROR("Bad connection reply from %s, rc = %d, " |
| 2723 | "version: %x max_frags: %d\n", |
| 2724 | libcfs_nid2str(peer->ibp_nid), rc, |
| 2725 | msg->ibm_version, msg->ibm_u.connparams.ibcp_max_frags); |
| 2726 | goto failed; |
| 2727 | } |
| 2728 | |
| 2729 | conn->ibc_incarnation = msg->ibm_srcstamp; |
| 2730 | conn->ibc_credits = |
| 2731 | conn->ibc_reserved_credits = IBLND_MSG_QUEUE_SIZE(ver); |
| 2732 | LASSERT (conn->ibc_credits + conn->ibc_reserved_credits + IBLND_OOB_MSGS(ver) |
| 2733 | <= IBLND_RX_MSGS(ver)); |
| 2734 | |
| 2735 | kiblnd_connreq_done(conn, 0); |
| 2736 | return; |
| 2737 | |
| 2738 | failed: |
| 2739 | /* NB My QP has already established itself, so I handle anything going |
| 2740 | * wrong here by setting ibc_comms_error. |
| 2741 | * kiblnd_connreq_done(0) moves the conn state to ESTABLISHED, but then |
| 2742 | * immediately tears it down. */ |
| 2743 | |
| 2744 | LASSERT (rc != 0); |
| 2745 | conn->ibc_comms_error = rc; |
| 2746 | kiblnd_connreq_done(conn, 0); |
| 2747 | } |
| 2748 | |
| 2749 | int |
| 2750 | kiblnd_active_connect (struct rdma_cm_id *cmid) |
| 2751 | { |
| 2752 | kib_peer_t *peer = (kib_peer_t *)cmid->context; |
| 2753 | kib_conn_t *conn; |
| 2754 | kib_msg_t *msg; |
| 2755 | struct rdma_conn_param cp; |
| 2756 | int version; |
| 2757 | __u64 incarnation; |
| 2758 | unsigned long flags; |
| 2759 | int rc; |
| 2760 | |
| 2761 | read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| 2762 | |
| 2763 | incarnation = peer->ibp_incarnation; |
| 2764 | version = (peer->ibp_version == 0) ? IBLND_MSG_VERSION : |
| 2765 | peer->ibp_version; |
| 2766 | |
| 2767 | read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| 2768 | |
| 2769 | conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_ACTIVE_CONNECT, version); |
| 2770 | if (conn == NULL) { |
| 2771 | kiblnd_peer_connect_failed(peer, 1, -ENOMEM); |
| 2772 | kiblnd_peer_decref(peer); /* lose cmid's ref */ |
| 2773 | return -ENOMEM; |
| 2774 | } |
| 2775 | |
| 2776 | /* conn "owns" cmid now, so I return success from here on to ensure the |
| 2777 | * CM callback doesn't destroy cmid. conn also takes over cmid's ref |
| 2778 | * on peer */ |
| 2779 | |
| 2780 | msg = &conn->ibc_connvars->cv_msg; |
| 2781 | |
| 2782 | memset(msg, 0, sizeof(*msg)); |
| 2783 | kiblnd_init_msg(msg, IBLND_MSG_CONNREQ, sizeof(msg->ibm_u.connparams)); |
| 2784 | msg->ibm_u.connparams.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version); |
| 2785 | msg->ibm_u.connparams.ibcp_max_frags = IBLND_RDMA_FRAGS(version); |
| 2786 | msg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE; |
| 2787 | |
| 2788 | kiblnd_pack_msg(peer->ibp_ni, msg, version, |
| 2789 | 0, peer->ibp_nid, incarnation); |
| 2790 | |
| 2791 | memset(&cp, 0, sizeof(cp)); |
| 2792 | cp.private_data = msg; |
| 2793 | cp.private_data_len = msg->ibm_nob; |
| 2794 | cp.responder_resources = 0; /* No atomic ops or RDMA reads */ |
| 2795 | cp.initiator_depth = 0; |
| 2796 | cp.flow_control = 1; |
| 2797 | cp.retry_count = *kiblnd_tunables.kib_retry_count; |
| 2798 | cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count; |
| 2799 | |
| 2800 | LASSERT(cmid->context == (void *)conn); |
| 2801 | LASSERT(conn->ibc_cmid == cmid); |
| 2802 | |
| 2803 | rc = rdma_connect(cmid, &cp); |
| 2804 | if (rc != 0) { |
| 2805 | CERROR("Can't connect to %s: %d\n", |
| 2806 | libcfs_nid2str(peer->ibp_nid), rc); |
| 2807 | kiblnd_connreq_done(conn, rc); |
| 2808 | kiblnd_conn_decref(conn); |
| 2809 | } |
| 2810 | |
| 2811 | return 0; |
| 2812 | } |
| 2813 | |
| 2814 | int |
| 2815 | kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) |
| 2816 | { |
| 2817 | kib_peer_t *peer; |
| 2818 | kib_conn_t *conn; |
| 2819 | int rc; |
| 2820 | |
| 2821 | switch (event->event) { |
| 2822 | default: |
| 2823 | CERROR("Unexpected event: %d, status: %d\n", |
| 2824 | event->event, event->status); |
| 2825 | LBUG(); |
| 2826 | |
| 2827 | case RDMA_CM_EVENT_CONNECT_REQUEST: |
| 2828 | /* destroy cmid on failure */ |
| 2829 | rc = kiblnd_passive_connect(cmid, |
| 2830 | (void *)KIBLND_CONN_PARAM(event), |
| 2831 | KIBLND_CONN_PARAM_LEN(event)); |
| 2832 | CDEBUG(D_NET, "connreq: %d\n", rc); |
| 2833 | return rc; |
| 2834 | |
| 2835 | case RDMA_CM_EVENT_ADDR_ERROR: |
| 2836 | peer = (kib_peer_t *)cmid->context; |
| 2837 | CNETERR("%s: ADDR ERROR %d\n", |
| 2838 | libcfs_nid2str(peer->ibp_nid), event->status); |
| 2839 | kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH); |
| 2840 | kiblnd_peer_decref(peer); |
| 2841 | return -EHOSTUNREACH; /* rc != 0 destroys cmid */ |
| 2842 | |
| 2843 | case RDMA_CM_EVENT_ADDR_RESOLVED: |
| 2844 | peer = (kib_peer_t *)cmid->context; |
| 2845 | |
| 2846 | CDEBUG(D_NET,"%s Addr resolved: %d\n", |
| 2847 | libcfs_nid2str(peer->ibp_nid), event->status); |
| 2848 | |
| 2849 | if (event->status != 0) { |
| 2850 | CNETERR("Can't resolve address for %s: %d\n", |
| 2851 | libcfs_nid2str(peer->ibp_nid), event->status); |
| 2852 | rc = event->status; |
| 2853 | } else { |
| 2854 | rc = rdma_resolve_route( |
| 2855 | cmid, *kiblnd_tunables.kib_timeout * 1000); |
| 2856 | if (rc == 0) |
| 2857 | return 0; |
| 2858 | /* Can't initiate route resolution */ |
| 2859 | CERROR("Can't resolve route for %s: %d\n", |
| 2860 | libcfs_nid2str(peer->ibp_nid), rc); |
| 2861 | } |
| 2862 | kiblnd_peer_connect_failed(peer, 1, rc); |
| 2863 | kiblnd_peer_decref(peer); |
| 2864 | return rc; /* rc != 0 destroys cmid */ |
| 2865 | |
| 2866 | case RDMA_CM_EVENT_ROUTE_ERROR: |
| 2867 | peer = (kib_peer_t *)cmid->context; |
| 2868 | CNETERR("%s: ROUTE ERROR %d\n", |
| 2869 | libcfs_nid2str(peer->ibp_nid), event->status); |
| 2870 | kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH); |
| 2871 | kiblnd_peer_decref(peer); |
| 2872 | return -EHOSTUNREACH; /* rc != 0 destroys cmid */ |
| 2873 | |
| 2874 | case RDMA_CM_EVENT_ROUTE_RESOLVED: |
| 2875 | peer = (kib_peer_t *)cmid->context; |
| 2876 | CDEBUG(D_NET,"%s Route resolved: %d\n", |
| 2877 | libcfs_nid2str(peer->ibp_nid), event->status); |
| 2878 | |
| 2879 | if (event->status == 0) |
| 2880 | return kiblnd_active_connect(cmid); |
| 2881 | |
| 2882 | CNETERR("Can't resolve route for %s: %d\n", |
| 2883 | libcfs_nid2str(peer->ibp_nid), event->status); |
| 2884 | kiblnd_peer_connect_failed(peer, 1, event->status); |
| 2885 | kiblnd_peer_decref(peer); |
| 2886 | return event->status; /* rc != 0 destroys cmid */ |
| 2887 | |
| 2888 | case RDMA_CM_EVENT_UNREACHABLE: |
| 2889 | conn = (kib_conn_t *)cmid->context; |
| 2890 | LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT || |
| 2891 | conn->ibc_state == IBLND_CONN_PASSIVE_WAIT); |
| 2892 | CNETERR("%s: UNREACHABLE %d\n", |
| 2893 | libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status); |
| 2894 | kiblnd_connreq_done(conn, -ENETDOWN); |
| 2895 | kiblnd_conn_decref(conn); |
| 2896 | return 0; |
| 2897 | |
| 2898 | case RDMA_CM_EVENT_CONNECT_ERROR: |
| 2899 | conn = (kib_conn_t *)cmid->context; |
| 2900 | LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT || |
| 2901 | conn->ibc_state == IBLND_CONN_PASSIVE_WAIT); |
| 2902 | CNETERR("%s: CONNECT ERROR %d\n", |
| 2903 | libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status); |
| 2904 | kiblnd_connreq_done(conn, -ENOTCONN); |
| 2905 | kiblnd_conn_decref(conn); |
| 2906 | return 0; |
| 2907 | |
| 2908 | case RDMA_CM_EVENT_REJECTED: |
| 2909 | conn = (kib_conn_t *)cmid->context; |
| 2910 | switch (conn->ibc_state) { |
| 2911 | default: |
| 2912 | LBUG(); |
| 2913 | |
| 2914 | case IBLND_CONN_PASSIVE_WAIT: |
| 2915 | CERROR ("%s: REJECTED %d\n", |
| 2916 | libcfs_nid2str(conn->ibc_peer->ibp_nid), |
| 2917 | event->status); |
| 2918 | kiblnd_connreq_done(conn, -ECONNRESET); |
| 2919 | break; |
| 2920 | |
| 2921 | case IBLND_CONN_ACTIVE_CONNECT: |
| 2922 | kiblnd_rejected(conn, event->status, |
| 2923 | (void *)KIBLND_CONN_PARAM(event), |
| 2924 | KIBLND_CONN_PARAM_LEN(event)); |
| 2925 | break; |
| 2926 | } |
| 2927 | kiblnd_conn_decref(conn); |
| 2928 | return 0; |
| 2929 | |
| 2930 | case RDMA_CM_EVENT_ESTABLISHED: |
| 2931 | conn = (kib_conn_t *)cmid->context; |
| 2932 | switch (conn->ibc_state) { |
| 2933 | default: |
| 2934 | LBUG(); |
| 2935 | |
| 2936 | case IBLND_CONN_PASSIVE_WAIT: |
| 2937 | CDEBUG(D_NET, "ESTABLISHED (passive): %s\n", |
| 2938 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 2939 | kiblnd_connreq_done(conn, 0); |
| 2940 | break; |
| 2941 | |
| 2942 | case IBLND_CONN_ACTIVE_CONNECT: |
| 2943 | CDEBUG(D_NET, "ESTABLISHED(active): %s\n", |
| 2944 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 2945 | kiblnd_check_connreply(conn, |
| 2946 | (void *)KIBLND_CONN_PARAM(event), |
| 2947 | KIBLND_CONN_PARAM_LEN(event)); |
| 2948 | break; |
| 2949 | } |
| 2950 | /* net keeps its ref on conn! */ |
| 2951 | return 0; |
| 2952 | |
| 2953 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: |
| 2954 | CDEBUG(D_NET, "Ignore TIMEWAIT_EXIT event\n"); |
| 2955 | return 0; |
| 2956 | case RDMA_CM_EVENT_DISCONNECTED: |
| 2957 | conn = (kib_conn_t *)cmid->context; |
| 2958 | if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { |
| 2959 | CERROR("%s DISCONNECTED\n", |
| 2960 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 2961 | kiblnd_connreq_done(conn, -ECONNRESET); |
| 2962 | } else { |
| 2963 | kiblnd_close_conn(conn, 0); |
| 2964 | } |
| 2965 | kiblnd_conn_decref(conn); |
| 2966 | cmid->context = NULL; |
| 2967 | return 0; |
| 2968 | |
| 2969 | case RDMA_CM_EVENT_DEVICE_REMOVAL: |
| 2970 | LCONSOLE_ERROR_MSG(0x131, |
| 2971 | "Received notification of device removal\n" |
| 2972 | "Please shutdown LNET to allow this to proceed\n"); |
| 2973 | /* Can't remove network from underneath LNET for now, so I have |
| 2974 | * to ignore this */ |
| 2975 | return 0; |
| 2976 | |
| 2977 | case RDMA_CM_EVENT_ADDR_CHANGE: |
| 2978 | LCONSOLE_INFO("Physical link changed (eg hca/port)\n"); |
| 2979 | return 0; |
| 2980 | } |
| 2981 | } |
| 2982 | |
| 2983 | static int |
| 2984 | kiblnd_check_txs_locked(kib_conn_t *conn, struct list_head *txs) |
| 2985 | { |
| 2986 | kib_tx_t *tx; |
| 2987 | struct list_head *ttmp; |
| 2988 | |
| 2989 | list_for_each (ttmp, txs) { |
| 2990 | tx = list_entry (ttmp, kib_tx_t, tx_list); |
| 2991 | |
| 2992 | if (txs != &conn->ibc_active_txs) { |
| 2993 | LASSERT (tx->tx_queued); |
| 2994 | } else { |
| 2995 | LASSERT (!tx->tx_queued); |
| 2996 | LASSERT (tx->tx_waiting || tx->tx_sending != 0); |
| 2997 | } |
| 2998 | |
| 2999 | if (cfs_time_aftereq (jiffies, tx->tx_deadline)) { |
| 3000 | CERROR("Timed out tx: %s, %lu seconds\n", |
| 3001 | kiblnd_queue2str(conn, txs), |
| 3002 | cfs_duration_sec(jiffies - tx->tx_deadline)); |
| 3003 | return 1; |
| 3004 | } |
| 3005 | } |
| 3006 | |
| 3007 | return 0; |
| 3008 | } |
| 3009 | |
| 3010 | static int |
| 3011 | kiblnd_conn_timed_out_locked(kib_conn_t *conn) |
| 3012 | { |
| 3013 | return kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue) || |
| 3014 | kiblnd_check_txs_locked(conn, &conn->ibc_tx_noops) || |
| 3015 | kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_rsrvd) || |
| 3016 | kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_nocred) || |
| 3017 | kiblnd_check_txs_locked(conn, &conn->ibc_active_txs); |
| 3018 | } |
| 3019 | |
| 3020 | void |
| 3021 | kiblnd_check_conns (int idx) |
| 3022 | { |
| 3023 | LIST_HEAD (closes); |
| 3024 | LIST_HEAD (checksends); |
| 3025 | struct list_head *peers = &kiblnd_data.kib_peers[idx]; |
| 3026 | struct list_head *ptmp; |
| 3027 | kib_peer_t *peer; |
| 3028 | kib_conn_t *conn; |
| 3029 | struct list_head *ctmp; |
| 3030 | unsigned long flags; |
| 3031 | |
| 3032 | /* NB. We expect to have a look at all the peers and not find any |
| 3033 | * RDMAs to time out, so we just use a shared lock while we |
| 3034 | * take a look... */ |
| 3035 | read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| 3036 | |
| 3037 | list_for_each (ptmp, peers) { |
| 3038 | peer = list_entry (ptmp, kib_peer_t, ibp_list); |
| 3039 | |
| 3040 | list_for_each (ctmp, &peer->ibp_conns) { |
| 3041 | int timedout; |
| 3042 | int sendnoop; |
| 3043 | |
| 3044 | conn = list_entry(ctmp, kib_conn_t, ibc_list); |
| 3045 | |
| 3046 | LASSERT (conn->ibc_state == IBLND_CONN_ESTABLISHED); |
| 3047 | |
| 3048 | spin_lock(&conn->ibc_lock); |
| 3049 | |
| 3050 | sendnoop = kiblnd_need_noop(conn); |
| 3051 | timedout = kiblnd_conn_timed_out_locked(conn); |
| 3052 | if (!sendnoop && !timedout) { |
| 3053 | spin_unlock(&conn->ibc_lock); |
| 3054 | continue; |
| 3055 | } |
| 3056 | |
| 3057 | if (timedout) { |
| 3058 | CERROR("Timed out RDMA with %s (%lu): " |
| 3059 | "c: %u, oc: %u, rc: %u\n", |
| 3060 | libcfs_nid2str(peer->ibp_nid), |
| 3061 | cfs_duration_sec(cfs_time_current() - |
| 3062 | peer->ibp_last_alive), |
| 3063 | conn->ibc_credits, |
| 3064 | conn->ibc_outstanding_credits, |
| 3065 | conn->ibc_reserved_credits); |
| 3066 | list_add(&conn->ibc_connd_list, &closes); |
| 3067 | } else { |
| 3068 | list_add(&conn->ibc_connd_list, |
| 3069 | &checksends); |
| 3070 | } |
| 3071 | /* +ref for 'closes' or 'checksends' */ |
| 3072 | kiblnd_conn_addref(conn); |
| 3073 | |
| 3074 | spin_unlock(&conn->ibc_lock); |
| 3075 | } |
| 3076 | } |
| 3077 | |
| 3078 | read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| 3079 | |
| 3080 | /* Handle timeout by closing the whole |
| 3081 | * connection. We can only be sure RDMA activity |
| 3082 | * has ceased once the QP has been modified. */ |
| 3083 | while (!list_empty(&closes)) { |
| 3084 | conn = list_entry(closes.next, |
| 3085 | kib_conn_t, ibc_connd_list); |
| 3086 | list_del(&conn->ibc_connd_list); |
| 3087 | kiblnd_close_conn(conn, -ETIMEDOUT); |
| 3088 | kiblnd_conn_decref(conn); |
| 3089 | } |
| 3090 | |
| 3091 | /* In case we have enough credits to return via a |
| 3092 | * NOOP, but there were no non-blocking tx descs |
| 3093 | * free to do it last time... */ |
| 3094 | while (!list_empty(&checksends)) { |
| 3095 | conn = list_entry(checksends.next, |
| 3096 | kib_conn_t, ibc_connd_list); |
| 3097 | list_del(&conn->ibc_connd_list); |
| 3098 | kiblnd_check_sends(conn); |
| 3099 | kiblnd_conn_decref(conn); |
| 3100 | } |
| 3101 | } |
| 3102 | |
| 3103 | void |
| 3104 | kiblnd_disconnect_conn (kib_conn_t *conn) |
| 3105 | { |
| 3106 | LASSERT (!in_interrupt()); |
| 3107 | LASSERT (current == kiblnd_data.kib_connd); |
| 3108 | LASSERT (conn->ibc_state == IBLND_CONN_CLOSING); |
| 3109 | |
| 3110 | rdma_disconnect(conn->ibc_cmid); |
| 3111 | kiblnd_finalise_conn(conn); |
| 3112 | |
| 3113 | kiblnd_peer_notify(conn->ibc_peer); |
| 3114 | } |
| 3115 | |
| 3116 | int |
| 3117 | kiblnd_connd (void *arg) |
| 3118 | { |
| 3119 | wait_queue_t wait; |
| 3120 | unsigned long flags; |
| 3121 | kib_conn_t *conn; |
| 3122 | int timeout; |
| 3123 | int i; |
| 3124 | int dropped_lock; |
| 3125 | int peer_index = 0; |
| 3126 | unsigned long deadline = jiffies; |
| 3127 | |
| 3128 | cfs_block_allsigs (); |
| 3129 | |
| 3130 | init_waitqueue_entry_current (&wait); |
| 3131 | kiblnd_data.kib_connd = current; |
| 3132 | |
| 3133 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| 3134 | |
| 3135 | while (!kiblnd_data.kib_shutdown) { |
| 3136 | |
| 3137 | dropped_lock = 0; |
| 3138 | |
| 3139 | if (!list_empty (&kiblnd_data.kib_connd_zombies)) { |
| 3140 | conn = list_entry(kiblnd_data. \ |
| 3141 | kib_connd_zombies.next, |
| 3142 | kib_conn_t, ibc_list); |
| 3143 | list_del(&conn->ibc_list); |
| 3144 | |
| 3145 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, |
| 3146 | flags); |
| 3147 | dropped_lock = 1; |
| 3148 | |
| 3149 | kiblnd_destroy_conn(conn); |
| 3150 | |
| 3151 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| 3152 | } |
| 3153 | |
| 3154 | if (!list_empty(&kiblnd_data.kib_connd_conns)) { |
| 3155 | conn = list_entry(kiblnd_data.kib_connd_conns.next, |
| 3156 | kib_conn_t, ibc_list); |
| 3157 | list_del(&conn->ibc_list); |
| 3158 | |
| 3159 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, |
| 3160 | flags); |
| 3161 | dropped_lock = 1; |
| 3162 | |
| 3163 | kiblnd_disconnect_conn(conn); |
| 3164 | kiblnd_conn_decref(conn); |
| 3165 | |
| 3166 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| 3167 | } |
| 3168 | |
| 3169 | /* careful with the jiffy wrap... */ |
| 3170 | timeout = (int)(deadline - jiffies); |
| 3171 | if (timeout <= 0) { |
| 3172 | const int n = 4; |
| 3173 | const int p = 1; |
| 3174 | int chunk = kiblnd_data.kib_peer_hash_size; |
| 3175 | |
| 3176 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); |
| 3177 | dropped_lock = 1; |
| 3178 | |
| 3179 | /* Time to check for RDMA timeouts on a few more |
| 3180 | * peers: I do checks every 'p' seconds on a |
| 3181 | * proportion of the peer table and I need to check |
| 3182 | * every connection 'n' times within a timeout |
| 3183 | * interval, to ensure I detect a timeout on any |
| 3184 | * connection within (n+1)/n times the timeout |
| 3185 | * interval. */ |
| 3186 | |
| 3187 | if (*kiblnd_tunables.kib_timeout > n * p) |
| 3188 | chunk = (chunk * n * p) / |
| 3189 | *kiblnd_tunables.kib_timeout; |
| 3190 | if (chunk == 0) |
| 3191 | chunk = 1; |
| 3192 | |
| 3193 | for (i = 0; i < chunk; i++) { |
| 3194 | kiblnd_check_conns(peer_index); |
| 3195 | peer_index = (peer_index + 1) % |
| 3196 | kiblnd_data.kib_peer_hash_size; |
| 3197 | } |
| 3198 | |
| 3199 | deadline += p * HZ; |
| 3200 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| 3201 | } |
| 3202 | |
| 3203 | if (dropped_lock) |
| 3204 | continue; |
| 3205 | |
| 3206 | /* Nothing to do for 'timeout' */ |
| 3207 | set_current_state(TASK_INTERRUPTIBLE); |
| 3208 | add_wait_queue(&kiblnd_data.kib_connd_waitq, &wait); |
| 3209 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); |
| 3210 | |
| 3211 | waitq_timedwait(&wait, TASK_INTERRUPTIBLE, timeout); |
| 3212 | |
| 3213 | set_current_state(TASK_RUNNING); |
| 3214 | remove_wait_queue(&kiblnd_data.kib_connd_waitq, &wait); |
| 3215 | spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| 3216 | } |
| 3217 | |
| 3218 | spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); |
| 3219 | |
| 3220 | kiblnd_thread_fini(); |
| 3221 | return 0; |
| 3222 | } |
| 3223 | |
| 3224 | void |
| 3225 | kiblnd_qp_event(struct ib_event *event, void *arg) |
| 3226 | { |
| 3227 | kib_conn_t *conn = arg; |
| 3228 | |
| 3229 | switch (event->event) { |
| 3230 | case IB_EVENT_COMM_EST: |
| 3231 | CDEBUG(D_NET, "%s established\n", |
| 3232 | libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| 3233 | return; |
| 3234 | |
| 3235 | default: |
| 3236 | CERROR("%s: Async QP event type %d\n", |
| 3237 | libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event); |
| 3238 | return; |
| 3239 | } |
| 3240 | } |
| 3241 | |
| 3242 | void |
| 3243 | kiblnd_complete (struct ib_wc *wc) |
| 3244 | { |
| 3245 | switch (kiblnd_wreqid2type(wc->wr_id)) { |
| 3246 | default: |
| 3247 | LBUG(); |
| 3248 | |
| 3249 | case IBLND_WID_RDMA: |
| 3250 | /* We only get RDMA completion notification if it fails. All |
| 3251 | * subsequent work items, including the final SEND will fail |
| 3252 | * too. However we can't print out any more info about the |
| 3253 | * failing RDMA because 'tx' might be back on the idle list or |
| 3254 | * even reused already if we didn't manage to post all our work |
| 3255 | * items */ |
| 3256 | CNETERR("RDMA (tx: %p) failed: %d\n", |
| 3257 | kiblnd_wreqid2ptr(wc->wr_id), wc->status); |
| 3258 | return; |
| 3259 | |
| 3260 | case IBLND_WID_TX: |
| 3261 | kiblnd_tx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status); |
| 3262 | return; |
| 3263 | |
| 3264 | case IBLND_WID_RX: |
| 3265 | kiblnd_rx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status, |
| 3266 | wc->byte_len); |
| 3267 | return; |
| 3268 | } |
| 3269 | } |
| 3270 | |
| 3271 | void |
| 3272 | kiblnd_cq_completion(struct ib_cq *cq, void *arg) |
| 3273 | { |
| 3274 | /* NB I'm not allowed to schedule this conn once its refcount has |
| 3275 | * reached 0. Since fundamentally I'm racing with scheduler threads |
| 3276 | * consuming my CQ I could be called after all completions have |
| 3277 | * occurred. But in this case, ibc_nrx == 0 && ibc_nsends_posted == 0 |
| 3278 | * and this CQ is about to be destroyed so I NOOP. */ |
| 3279 | kib_conn_t *conn = (kib_conn_t *)arg; |
| 3280 | struct kib_sched_info *sched = conn->ibc_sched; |
| 3281 | unsigned long flags; |
| 3282 | |
| 3283 | LASSERT(cq == conn->ibc_cq); |
| 3284 | |
| 3285 | spin_lock_irqsave(&sched->ibs_lock, flags); |
| 3286 | |
| 3287 | conn->ibc_ready = 1; |
| 3288 | |
| 3289 | if (!conn->ibc_scheduled && |
| 3290 | (conn->ibc_nrx > 0 || |
| 3291 | conn->ibc_nsends_posted > 0)) { |
| 3292 | kiblnd_conn_addref(conn); /* +1 ref for sched_conns */ |
| 3293 | conn->ibc_scheduled = 1; |
| 3294 | list_add_tail(&conn->ibc_sched_list, &sched->ibs_conns); |
| 3295 | |
| 3296 | if (waitqueue_active(&sched->ibs_waitq)) |
| 3297 | wake_up(&sched->ibs_waitq); |
| 3298 | } |
| 3299 | |
| 3300 | spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| 3301 | } |
| 3302 | |
| 3303 | void |
| 3304 | kiblnd_cq_event(struct ib_event *event, void *arg) |
| 3305 | { |
| 3306 | kib_conn_t *conn = arg; |
| 3307 | |
| 3308 | CERROR("%s: async CQ event type %d\n", |
| 3309 | libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event); |
| 3310 | } |
| 3311 | |
| 3312 | int |
| 3313 | kiblnd_scheduler(void *arg) |
| 3314 | { |
| 3315 | long id = (long)arg; |
| 3316 | struct kib_sched_info *sched; |
| 3317 | kib_conn_t *conn; |
| 3318 | wait_queue_t wait; |
| 3319 | unsigned long flags; |
| 3320 | struct ib_wc wc; |
| 3321 | int did_something; |
| 3322 | int busy_loops = 0; |
| 3323 | int rc; |
| 3324 | |
| 3325 | cfs_block_allsigs(); |
| 3326 | |
| 3327 | init_waitqueue_entry_current(&wait); |
| 3328 | |
| 3329 | sched = kiblnd_data.kib_scheds[KIB_THREAD_CPT(id)]; |
| 3330 | |
| 3331 | rc = cfs_cpt_bind(lnet_cpt_table(), sched->ibs_cpt); |
| 3332 | if (rc != 0) { |
| 3333 | CWARN("Failed to bind on CPT %d, please verify whether " |
| 3334 | "all CPUs are healthy and reload modules if necessary, " |
| 3335 | "otherwise your system might under risk of low " |
| 3336 | "performance\n", sched->ibs_cpt); |
| 3337 | } |
| 3338 | |
| 3339 | spin_lock_irqsave(&sched->ibs_lock, flags); |
| 3340 | |
| 3341 | while (!kiblnd_data.kib_shutdown) { |
| 3342 | if (busy_loops++ >= IBLND_RESCHED) { |
| 3343 | spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| 3344 | |
| 3345 | cond_resched(); |
| 3346 | busy_loops = 0; |
| 3347 | |
| 3348 | spin_lock_irqsave(&sched->ibs_lock, flags); |
| 3349 | } |
| 3350 | |
| 3351 | did_something = 0; |
| 3352 | |
| 3353 | if (!list_empty(&sched->ibs_conns)) { |
| 3354 | conn = list_entry(sched->ibs_conns.next, |
| 3355 | kib_conn_t, ibc_sched_list); |
| 3356 | /* take over kib_sched_conns' ref on conn... */ |
| 3357 | LASSERT(conn->ibc_scheduled); |
| 3358 | list_del(&conn->ibc_sched_list); |
| 3359 | conn->ibc_ready = 0; |
| 3360 | |
| 3361 | spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| 3362 | |
| 3363 | rc = ib_poll_cq(conn->ibc_cq, 1, &wc); |
| 3364 | if (rc == 0) { |
| 3365 | rc = ib_req_notify_cq(conn->ibc_cq, |
| 3366 | IB_CQ_NEXT_COMP); |
| 3367 | if (rc < 0) { |
| 3368 | CWARN("%s: ib_req_notify_cq failed: %d, " |
| 3369 | "closing connection\n", |
| 3370 | libcfs_nid2str(conn->ibc_peer->ibp_nid), rc); |
| 3371 | kiblnd_close_conn(conn, -EIO); |
| 3372 | kiblnd_conn_decref(conn); |
| 3373 | spin_lock_irqsave(&sched->ibs_lock, |
| 3374 | flags); |
| 3375 | continue; |
| 3376 | } |
| 3377 | |
| 3378 | rc = ib_poll_cq(conn->ibc_cq, 1, &wc); |
| 3379 | } |
| 3380 | |
| 3381 | if (rc < 0) { |
| 3382 | CWARN("%s: ib_poll_cq failed: %d, " |
| 3383 | "closing connection\n", |
| 3384 | libcfs_nid2str(conn->ibc_peer->ibp_nid), |
| 3385 | rc); |
| 3386 | kiblnd_close_conn(conn, -EIO); |
| 3387 | kiblnd_conn_decref(conn); |
| 3388 | spin_lock_irqsave(&sched->ibs_lock, flags); |
| 3389 | continue; |
| 3390 | } |
| 3391 | |
| 3392 | spin_lock_irqsave(&sched->ibs_lock, flags); |
| 3393 | |
| 3394 | if (rc != 0 || conn->ibc_ready) { |
| 3395 | /* There may be another completion waiting; get |
| 3396 | * another scheduler to check while I handle |
| 3397 | * this one... */ |
| 3398 | /* +1 ref for sched_conns */ |
| 3399 | kiblnd_conn_addref(conn); |
| 3400 | list_add_tail(&conn->ibc_sched_list, |
| 3401 | &sched->ibs_conns); |
| 3402 | if (waitqueue_active(&sched->ibs_waitq)) |
| 3403 | wake_up(&sched->ibs_waitq); |
| 3404 | } else { |
| 3405 | conn->ibc_scheduled = 0; |
| 3406 | } |
| 3407 | |
| 3408 | if (rc != 0) { |
| 3409 | spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| 3410 | kiblnd_complete(&wc); |
| 3411 | |
| 3412 | spin_lock_irqsave(&sched->ibs_lock, flags); |
| 3413 | } |
| 3414 | |
| 3415 | kiblnd_conn_decref(conn); /* ...drop my ref from above */ |
| 3416 | did_something = 1; |
| 3417 | } |
| 3418 | |
| 3419 | if (did_something) |
| 3420 | continue; |
| 3421 | |
| 3422 | set_current_state(TASK_INTERRUPTIBLE); |
| 3423 | add_wait_queue_exclusive(&sched->ibs_waitq, &wait); |
| 3424 | spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| 3425 | |
| 3426 | waitq_wait(&wait, TASK_INTERRUPTIBLE); |
| 3427 | busy_loops = 0; |
| 3428 | |
| 3429 | remove_wait_queue(&sched->ibs_waitq, &wait); |
| 3430 | set_current_state(TASK_RUNNING); |
| 3431 | spin_lock_irqsave(&sched->ibs_lock, flags); |
| 3432 | } |
| 3433 | |
| 3434 | spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| 3435 | |
| 3436 | kiblnd_thread_fini(); |
| 3437 | return 0; |
| 3438 | } |
| 3439 | |
| 3440 | int |
| 3441 | kiblnd_failover_thread(void *arg) |
| 3442 | { |
| 3443 | rwlock_t *glock = &kiblnd_data.kib_global_lock; |
| 3444 | kib_dev_t *dev; |
| 3445 | wait_queue_t wait; |
| 3446 | unsigned long flags; |
| 3447 | int rc; |
| 3448 | |
| 3449 | LASSERT (*kiblnd_tunables.kib_dev_failover != 0); |
| 3450 | |
| 3451 | cfs_block_allsigs (); |
| 3452 | |
| 3453 | init_waitqueue_entry_current(&wait); |
| 3454 | write_lock_irqsave(glock, flags); |
| 3455 | |
| 3456 | while (!kiblnd_data.kib_shutdown) { |
| 3457 | int do_failover = 0; |
| 3458 | int long_sleep; |
| 3459 | |
| 3460 | list_for_each_entry(dev, &kiblnd_data.kib_failed_devs, |
| 3461 | ibd_fail_list) { |
| 3462 | if (cfs_time_before(cfs_time_current(), |
| 3463 | dev->ibd_next_failover)) |
| 3464 | continue; |
| 3465 | do_failover = 1; |
| 3466 | break; |
| 3467 | } |
| 3468 | |
| 3469 | if (do_failover) { |
| 3470 | list_del_init(&dev->ibd_fail_list); |
| 3471 | dev->ibd_failover = 1; |
| 3472 | write_unlock_irqrestore(glock, flags); |
| 3473 | |
| 3474 | rc = kiblnd_dev_failover(dev); |
| 3475 | |
| 3476 | write_lock_irqsave(glock, flags); |
| 3477 | |
| 3478 | LASSERT (dev->ibd_failover); |
| 3479 | dev->ibd_failover = 0; |
| 3480 | if (rc >= 0) { /* Device is OK or failover succeed */ |
| 3481 | dev->ibd_next_failover = cfs_time_shift(3); |
| 3482 | continue; |
| 3483 | } |
| 3484 | |
| 3485 | /* failed to failover, retry later */ |
| 3486 | dev->ibd_next_failover = |
| 3487 | cfs_time_shift(min(dev->ibd_failed_failover, 10)); |
| 3488 | if (kiblnd_dev_can_failover(dev)) { |
| 3489 | list_add_tail(&dev->ibd_fail_list, |
| 3490 | &kiblnd_data.kib_failed_devs); |
| 3491 | } |
| 3492 | |
| 3493 | continue; |
| 3494 | } |
| 3495 | |
| 3496 | /* long sleep if no more pending failover */ |
| 3497 | long_sleep = list_empty(&kiblnd_data.kib_failed_devs); |
| 3498 | |
| 3499 | set_current_state(TASK_INTERRUPTIBLE); |
| 3500 | add_wait_queue(&kiblnd_data.kib_failover_waitq, &wait); |
| 3501 | write_unlock_irqrestore(glock, flags); |
| 3502 | |
| 3503 | rc = schedule_timeout(long_sleep ? cfs_time_seconds(10) : |
| 3504 | cfs_time_seconds(1)); |
| 3505 | set_current_state(TASK_RUNNING); |
| 3506 | remove_wait_queue(&kiblnd_data.kib_failover_waitq, &wait); |
| 3507 | write_lock_irqsave(glock, flags); |
| 3508 | |
| 3509 | if (!long_sleep || rc != 0) |
| 3510 | continue; |
| 3511 | |
| 3512 | /* have a long sleep, routine check all active devices, |
| 3513 | * we need checking like this because if there is not active |
| 3514 | * connection on the dev and no SEND from local, we may listen |
| 3515 | * on wrong HCA for ever while there is a bonding failover */ |
| 3516 | list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) { |
| 3517 | if (kiblnd_dev_can_failover(dev)) { |
| 3518 | list_add_tail(&dev->ibd_fail_list, |
| 3519 | &kiblnd_data.kib_failed_devs); |
| 3520 | } |
| 3521 | } |
| 3522 | } |
| 3523 | |
| 3524 | write_unlock_irqrestore(glock, flags); |
| 3525 | |
| 3526 | kiblnd_thread_fini(); |
| 3527 | return 0; |
| 3528 | } |