1 /* 2 * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2009 Intel Corporation. All rights reserved. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Maintained at www.Open-FCoE.org 19 */ 20 21 #include <linux/types.h> 22 #include <linux/module.h> 23 #include <linux/kernel.h> 24 #include <linux/list.h> 25 #include <linux/spinlock.h> 26 #include <linux/timer.h> 27 #include <linux/netdevice.h> 28 #include <linux/etherdevice.h> 29 #include <linux/ethtool.h> 30 #include <linux/if_ether.h> 31 #include <linux/if_vlan.h> 32 #include <linux/errno.h> 33 #include <linux/bitops.h> 34 #include <linux/slab.h> 35 #include <net/rtnetlink.h> 36 37 #include <scsi/fc/fc_els.h> 38 #include <scsi/fc/fc_fs.h> 39 #include <scsi/fc/fc_fip.h> 40 #include <scsi/fc/fc_encaps.h> 41 #include <scsi/fc/fc_fcoe.h> 42 #include <scsi/fc/fc_fcp.h> 43 44 #include <scsi/libfc.h> 45 #include <scsi/libfcoe.h> 46 47 #include "libfcoe.h" 48 49 #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */ 50 #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */ 51 52 static void fcoe_ctlr_timeout(unsigned long); 53 static void fcoe_ctlr_timer_work(struct work_struct *); 54 static void fcoe_ctlr_recv_work(struct work_struct *); 55 static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *); 56 57 static void fcoe_ctlr_vn_start(struct fcoe_ctlr *); 58 static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *); 59 static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *); 60 static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *); 61 62 static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; 63 static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS; 64 static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS; 65 static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS; 66 67 static const char * const fcoe_ctlr_states[] = { 68 [FIP_ST_DISABLED] = "DISABLED", 69 [FIP_ST_LINK_WAIT] = "LINK_WAIT", 70 [FIP_ST_AUTO] = "AUTO", 71 [FIP_ST_NON_FIP] = "NON_FIP", 72 [FIP_ST_ENABLED] = "ENABLED", 73 [FIP_ST_VNMP_START] = "VNMP_START", 74 [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1", 75 [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2", 76 [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM", 77 [FIP_ST_VNMP_UP] = "VNMP_UP", 78 }; 79 80 static const char *fcoe_ctlr_state(enum fip_state state) 81 { 82 const char *cp = "unknown"; 83 84 if (state < ARRAY_SIZE(fcoe_ctlr_states)) 85 cp = fcoe_ctlr_states[state]; 86 if (!cp) 87 cp = "unknown"; 88 return cp; 89 } 90 91 /** 92 * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state. 93 * @fip: The FCoE controller 94 * @state: The new state 95 */ 96 static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state) 97 { 98 if (state == fip->state) 99 return; 100 if (fip->lp) 101 LIBFCOE_FIP_DBG(fip, "state %s -> %s\n", 102 fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state)); 103 fip->state = state; 104 } 105 106 /** 107 * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid 108 * @fcf: The FCF to check 109 * 110 * Return non-zero if FCF fcoe_size has been validated. 111 */ 112 static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf) 113 { 114 return (fcf->flags & FIP_FL_SOL) != 0; 115 } 116 117 /** 118 * fcoe_ctlr_fcf_usable() - Check if a FCF is usable 119 * @fcf: The FCF to check 120 * 121 * Return non-zero if the FCF is usable. 122 */ 123 static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf) 124 { 125 u16 flags = FIP_FL_SOL | FIP_FL_AVAIL; 126 127 return (fcf->flags & flags) == flags; 128 } 129 130 /** 131 * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses 132 * @fip: The FCoE controller 133 */ 134 static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip) 135 { 136 if (fip->mode == FIP_MODE_VN2VN) 137 hton24(fip->dest_addr, FIP_VN_FC_MAP); 138 else 139 hton24(fip->dest_addr, FIP_DEF_FC_MAP); 140 hton24(fip->dest_addr + 3, 0); 141 fip->map_dest = 1; 142 } 143 144 /** 145 * fcoe_ctlr_init() - Initialize the FCoE Controller instance 146 * @fip: The FCoE controller to initialize 147 */ 148 void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode) 149 { 150 fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); 151 fip->mode = mode; 152 INIT_LIST_HEAD(&fip->fcfs); 153 mutex_init(&fip->ctlr_mutex); 154 spin_lock_init(&fip->ctlr_lock); 155 fip->flogi_oxid = FC_XID_UNKNOWN; 156 setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); 157 INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work); 158 INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); 159 skb_queue_head_init(&fip->fip_recv_list); 160 } 161 EXPORT_SYMBOL(fcoe_ctlr_init); 162 163 /** 164 * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller 165 * @fip: The FCoE controller whose FCFs are to be reset 166 * 167 * Called with &fcoe_ctlr lock held. 168 */ 169 static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) 170 { 171 struct fcoe_fcf *fcf; 172 struct fcoe_fcf *next; 173 174 fip->sel_fcf = NULL; 175 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { 176 list_del(&fcf->list); 177 kfree(fcf); 178 } 179 fip->fcf_count = 0; 180 fip->sel_time = 0; 181 } 182 183 /** 184 * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller 185 * @fip: The FCoE controller to tear down 186 * 187 * This is called by FCoE drivers before freeing the &fcoe_ctlr. 188 * 189 * The receive handler will have been deleted before this to guarantee 190 * that no more recv_work will be scheduled. 191 * 192 * The timer routine will simply return once we set FIP_ST_DISABLED. 193 * This guarantees that no further timeouts or work will be scheduled. 194 */ 195 void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) 196 { 197 cancel_work_sync(&fip->recv_work); 198 skb_queue_purge(&fip->fip_recv_list); 199 200 mutex_lock(&fip->ctlr_mutex); 201 fcoe_ctlr_set_state(fip, FIP_ST_DISABLED); 202 fcoe_ctlr_reset_fcfs(fip); 203 mutex_unlock(&fip->ctlr_mutex); 204 del_timer_sync(&fip->timer); 205 cancel_work_sync(&fip->timer_work); 206 } 207 EXPORT_SYMBOL(fcoe_ctlr_destroy); 208 209 /** 210 * fcoe_ctlr_announce() - announce new FCF selection 211 * @fip: The FCoE controller 212 * 213 * Also sets the destination MAC for FCoE and control packets 214 * 215 * Called with neither ctlr_mutex nor ctlr_lock held. 216 */ 217 static void fcoe_ctlr_announce(struct fcoe_ctlr *fip) 218 { 219 struct fcoe_fcf *sel; 220 struct fcoe_fcf *fcf; 221 222 mutex_lock(&fip->ctlr_mutex); 223 spin_lock_bh(&fip->ctlr_lock); 224 225 kfree_skb(fip->flogi_req); 226 fip->flogi_req = NULL; 227 list_for_each_entry(fcf, &fip->fcfs, list) 228 fcf->flogi_sent = 0; 229 230 spin_unlock_bh(&fip->ctlr_lock); 231 sel = fip->sel_fcf; 232 233 if (sel && !compare_ether_addr(sel->fcf_mac, fip->dest_addr)) 234 goto unlock; 235 if (!is_zero_ether_addr(fip->dest_addr)) { 236 printk(KERN_NOTICE "libfcoe: host%d: " 237 "FIP Fibre-Channel Forwarder MAC %pM deselected\n", 238 fip->lp->host->host_no, fip->dest_addr); 239 memset(fip->dest_addr, 0, ETH_ALEN); 240 } 241 if (sel) { 242 printk(KERN_INFO "libfcoe: host%d: FIP selected " 243 "Fibre-Channel Forwarder MAC %pM\n", 244 fip->lp->host->host_no, sel->fcf_mac); 245 memcpy(fip->dest_addr, sel->fcoe_mac, ETH_ALEN); 246 fip->map_dest = 0; 247 } 248 unlock: 249 mutex_unlock(&fip->ctlr_mutex); 250 } 251 252 /** 253 * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port 254 * @fip: The FCoE controller to get the maximum FCoE size from 255 * 256 * Returns the maximum packet size including the FCoE header and trailer, 257 * but not including any Ethernet or VLAN headers. 258 */ 259 static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip) 260 { 261 /* 262 * Determine the max FCoE frame size allowed, including 263 * FCoE header and trailer. 264 * Note: lp->mfs is currently the payload size, not the frame size. 265 */ 266 return fip->lp->mfs + sizeof(struct fc_frame_header) + 267 sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof); 268 } 269 270 /** 271 * fcoe_ctlr_solicit() - Send a FIP solicitation 272 * @fip: The FCoE controller to send the solicitation on 273 * @fcf: The destination FCF (if NULL, a multicast solicitation is sent) 274 */ 275 static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf) 276 { 277 struct sk_buff *skb; 278 struct fip_sol { 279 struct ethhdr eth; 280 struct fip_header fip; 281 struct { 282 struct fip_mac_desc mac; 283 struct fip_wwn_desc wwnn; 284 struct fip_size_desc size; 285 } __packed desc; 286 } __packed * sol; 287 u32 fcoe_size; 288 289 skb = dev_alloc_skb(sizeof(*sol)); 290 if (!skb) 291 return; 292 293 sol = (struct fip_sol *)skb->data; 294 295 memset(sol, 0, sizeof(*sol)); 296 memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN); 297 memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN); 298 sol->eth.h_proto = htons(ETH_P_FIP); 299 300 sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); 301 sol->fip.fip_op = htons(FIP_OP_DISC); 302 sol->fip.fip_subcode = FIP_SC_SOL; 303 sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW); 304 sol->fip.fip_flags = htons(FIP_FL_FPMA); 305 if (fip->spma) 306 sol->fip.fip_flags |= htons(FIP_FL_SPMA); 307 308 sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; 309 sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW; 310 memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); 311 312 sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; 313 sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW; 314 put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn); 315 316 fcoe_size = fcoe_ctlr_fcoe_size(fip); 317 sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; 318 sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW; 319 sol->desc.size.fd_size = htons(fcoe_size); 320 321 skb_put(skb, sizeof(*sol)); 322 skb->protocol = htons(ETH_P_FIP); 323 skb->priority = fip->priority; 324 skb_reset_mac_header(skb); 325 skb_reset_network_header(skb); 326 fip->send(fip, skb); 327 328 if (!fcf) 329 fip->sol_time = jiffies; 330 } 331 332 /** 333 * fcoe_ctlr_link_up() - Start FCoE controller 334 * @fip: The FCoE controller to start 335 * 336 * Called from the LLD when the network link is ready. 337 */ 338 void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) 339 { 340 mutex_lock(&fip->ctlr_mutex); 341 if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { 342 mutex_unlock(&fip->ctlr_mutex); 343 fc_linkup(fip->lp); 344 } else if (fip->state == FIP_ST_LINK_WAIT) { 345 fcoe_ctlr_set_state(fip, fip->mode); 346 switch (fip->mode) { 347 default: 348 LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode); 349 /* fall-through */ 350 case FIP_MODE_AUTO: 351 LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n"); 352 /* fall-through */ 353 case FIP_MODE_FABRIC: 354 case FIP_MODE_NON_FIP: 355 mutex_unlock(&fip->ctlr_mutex); 356 fc_linkup(fip->lp); 357 fcoe_ctlr_solicit(fip, NULL); 358 break; 359 case FIP_MODE_VN2VN: 360 fcoe_ctlr_vn_start(fip); 361 mutex_unlock(&fip->ctlr_mutex); 362 fc_linkup(fip->lp); 363 break; 364 } 365 } else 366 mutex_unlock(&fip->ctlr_mutex); 367 } 368 EXPORT_SYMBOL(fcoe_ctlr_link_up); 369 370 /** 371 * fcoe_ctlr_reset() - Reset a FCoE controller 372 * @fip: The FCoE controller to reset 373 */ 374 static void fcoe_ctlr_reset(struct fcoe_ctlr *fip) 375 { 376 fcoe_ctlr_reset_fcfs(fip); 377 del_timer(&fip->timer); 378 fip->ctlr_ka_time = 0; 379 fip->port_ka_time = 0; 380 fip->sol_time = 0; 381 fip->flogi_oxid = FC_XID_UNKNOWN; 382 fcoe_ctlr_map_dest(fip); 383 } 384 385 /** 386 * fcoe_ctlr_link_down() - Stop a FCoE controller 387 * @fip: The FCoE controller to be stopped 388 * 389 * Returns non-zero if the link was up and now isn't. 390 * 391 * Called from the LLD when the network link is not ready. 392 * There may be multiple calls while the link is down. 393 */ 394 int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) 395 { 396 int link_dropped; 397 398 LIBFCOE_FIP_DBG(fip, "link down.\n"); 399 mutex_lock(&fip->ctlr_mutex); 400 fcoe_ctlr_reset(fip); 401 link_dropped = fip->state != FIP_ST_LINK_WAIT; 402 fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); 403 mutex_unlock(&fip->ctlr_mutex); 404 405 if (link_dropped) 406 fc_linkdown(fip->lp); 407 return link_dropped; 408 } 409 EXPORT_SYMBOL(fcoe_ctlr_link_down); 410 411 /** 412 * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF 413 * @fip: The FCoE controller to send the FKA on 414 * @lport: libfc fc_lport to send from 415 * @ports: 0 for controller keep-alive, 1 for port keep-alive 416 * @sa: The source MAC address 417 * 418 * A controller keep-alive is sent every fka_period (typically 8 seconds). 419 * The source MAC is the native MAC address. 420 * 421 * A port keep-alive is sent every 90 seconds while logged in. 422 * The source MAC is the assigned mapped source address. 423 * The destination is the FCF's F-port. 424 */ 425 static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, 426 struct fc_lport *lport, 427 int ports, u8 *sa) 428 { 429 struct sk_buff *skb; 430 struct fip_kal { 431 struct ethhdr eth; 432 struct fip_header fip; 433 struct fip_mac_desc mac; 434 } __packed * kal; 435 struct fip_vn_desc *vn; 436 u32 len; 437 struct fc_lport *lp; 438 struct fcoe_fcf *fcf; 439 440 fcf = fip->sel_fcf; 441 lp = fip->lp; 442 if (!fcf || (ports && !lp->port_id)) 443 return; 444 445 len = sizeof(*kal) + ports * sizeof(*vn); 446 skb = dev_alloc_skb(len); 447 if (!skb) 448 return; 449 450 kal = (struct fip_kal *)skb->data; 451 memset(kal, 0, len); 452 memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); 453 memcpy(kal->eth.h_source, sa, ETH_ALEN); 454 kal->eth.h_proto = htons(ETH_P_FIP); 455 456 kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); 457 kal->fip.fip_op = htons(FIP_OP_CTRL); 458 kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; 459 kal->fip.fip_dl_len = htons((sizeof(kal->mac) + 460 ports * sizeof(*vn)) / FIP_BPW); 461 kal->fip.fip_flags = htons(FIP_FL_FPMA); 462 if (fip->spma) 463 kal->fip.fip_flags |= htons(FIP_FL_SPMA); 464 465 kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; 466 kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; 467 memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); 468 if (ports) { 469 vn = (struct fip_vn_desc *)(kal + 1); 470 vn->fd_desc.fip_dtype = FIP_DT_VN_ID; 471 vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; 472 memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); 473 hton24(vn->fd_fc_id, lport->port_id); 474 put_unaligned_be64(lport->wwpn, &vn->fd_wwpn); 475 } 476 skb_put(skb, len); 477 skb->protocol = htons(ETH_P_FIP); 478 skb->priority = fip->priority; 479 skb_reset_mac_header(skb); 480 skb_reset_network_header(skb); 481 fip->send(fip, skb); 482 } 483 484 /** 485 * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it 486 * @fip: The FCoE controller for the ELS frame 487 * @dtype: The FIP descriptor type for the frame 488 * @skb: The FCoE ELS frame including FC header but no FCoE headers 489 * @d_id: The destination port ID. 490 * 491 * Returns non-zero error code on failure. 492 * 493 * The caller must check that the length is a multiple of 4. 494 * 495 * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). 496 * Headroom includes the FIP encapsulation description, FIP header, and 497 * Ethernet header. The tailroom is for the FIP MAC descriptor. 498 */ 499 static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, 500 u8 dtype, struct sk_buff *skb, u32 d_id) 501 { 502 struct fip_encaps_head { 503 struct ethhdr eth; 504 struct fip_header fip; 505 struct fip_encaps encaps; 506 } __packed * cap; 507 struct fc_frame_header *fh; 508 struct fip_mac_desc *mac; 509 struct fcoe_fcf *fcf; 510 size_t dlen; 511 u16 fip_flags; 512 u8 op; 513 514 fh = (struct fc_frame_header *)skb->data; 515 op = *(u8 *)(fh + 1); 516 dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ 517 cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap)); 518 memset(cap, 0, sizeof(*cap)); 519 520 if (lport->point_to_multipoint) { 521 if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest)) 522 return -ENODEV; 523 fip_flags = 0; 524 } else { 525 fcf = fip->sel_fcf; 526 if (!fcf) 527 return -ENODEV; 528 fip_flags = fcf->flags; 529 fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : 530 FIP_FL_FPMA; 531 if (!fip_flags) 532 return -ENODEV; 533 memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); 534 } 535 memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); 536 cap->eth.h_proto = htons(ETH_P_FIP); 537 538 cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); 539 cap->fip.fip_op = htons(FIP_OP_LS); 540 if (op == ELS_LS_ACC || op == ELS_LS_RJT) 541 cap->fip.fip_subcode = FIP_SC_REP; 542 else 543 cap->fip.fip_subcode = FIP_SC_REQ; 544 cap->fip.fip_flags = htons(fip_flags); 545 546 cap->encaps.fd_desc.fip_dtype = dtype; 547 cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; 548 549 if (op != ELS_LS_RJT) { 550 dlen += sizeof(*mac); 551 mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac)); 552 memset(mac, 0, sizeof(*mac)); 553 mac->fd_desc.fip_dtype = FIP_DT_MAC; 554 mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; 555 if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) { 556 memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); 557 } else if (fip->mode == FIP_MODE_VN2VN) { 558 hton24(mac->fd_mac, FIP_VN_FC_MAP); 559 hton24(mac->fd_mac + 3, fip->port_id); 560 } else if (fip_flags & FIP_FL_SPMA) { 561 LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n"); 562 memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); 563 } else { 564 LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n"); 565 /* FPMA only FLOGI. Must leave the MAC desc zeroed. */ 566 } 567 } 568 cap->fip.fip_dl_len = htons(dlen / FIP_BPW); 569 570 skb->protocol = htons(ETH_P_FIP); 571 skb->priority = fip->priority; 572 skb_reset_mac_header(skb); 573 skb_reset_network_header(skb); 574 return 0; 575 } 576 577 /** 578 * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. 579 * @fip: FCoE controller. 580 * @lport: libfc fc_lport to send from 581 * @skb: FCoE ELS frame including FC header but no FCoE headers. 582 * 583 * Returns a non-zero error code if the frame should not be sent. 584 * Returns zero if the caller should send the frame with FCoE encapsulation. 585 * 586 * The caller must check that the length is a multiple of 4. 587 * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). 588 * The the skb must also be an fc_frame. 589 * 590 * This is called from the lower-level driver with spinlocks held, 591 * so we must not take a mutex here. 592 */ 593 int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, 594 struct sk_buff *skb) 595 { 596 struct fc_frame *fp; 597 struct fc_frame_header *fh; 598 u16 old_xid; 599 u8 op; 600 u8 mac[ETH_ALEN]; 601 602 fp = container_of(skb, struct fc_frame, skb); 603 fh = (struct fc_frame_header *)skb->data; 604 op = *(u8 *)(fh + 1); 605 606 if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) { 607 old_xid = fip->flogi_oxid; 608 fip->flogi_oxid = ntohs(fh->fh_ox_id); 609 if (fip->state == FIP_ST_AUTO) { 610 if (old_xid == FC_XID_UNKNOWN) 611 fip->flogi_count = 0; 612 fip->flogi_count++; 613 if (fip->flogi_count < 3) 614 goto drop; 615 fcoe_ctlr_map_dest(fip); 616 return 0; 617 } 618 if (fip->state == FIP_ST_NON_FIP) 619 fcoe_ctlr_map_dest(fip); 620 } 621 622 if (fip->state == FIP_ST_NON_FIP) 623 return 0; 624 if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN) 625 goto drop; 626 switch (op) { 627 case ELS_FLOGI: 628 op = FIP_DT_FLOGI; 629 if (fip->mode == FIP_MODE_VN2VN) 630 break; 631 spin_lock_bh(&fip->ctlr_lock); 632 kfree_skb(fip->flogi_req); 633 fip->flogi_req = skb; 634 fip->flogi_req_send = 1; 635 spin_unlock_bh(&fip->ctlr_lock); 636 schedule_work(&fip->timer_work); 637 return -EINPROGRESS; 638 case ELS_FDISC: 639 if (ntoh24(fh->fh_s_id)) 640 return 0; 641 op = FIP_DT_FDISC; 642 break; 643 case ELS_LOGO: 644 if (fip->mode == FIP_MODE_VN2VN) { 645 if (fip->state != FIP_ST_VNMP_UP) 646 return -EINVAL; 647 if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI) 648 return -EINVAL; 649 } else { 650 if (fip->state != FIP_ST_ENABLED) 651 return 0; 652 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) 653 return 0; 654 } 655 op = FIP_DT_LOGO; 656 break; 657 case ELS_LS_ACC: 658 /* 659 * If non-FIP, we may have gotten an SID by accepting an FLOGI 660 * from a point-to-point connection. Switch to using 661 * the source mac based on the SID. The destination 662 * MAC in this case would have been set by receiving the 663 * FLOGI. 664 */ 665 if (fip->state == FIP_ST_NON_FIP) { 666 if (fip->flogi_oxid == FC_XID_UNKNOWN) 667 return 0; 668 fip->flogi_oxid = FC_XID_UNKNOWN; 669 fc_fcoe_set_mac(mac, fh->fh_d_id); 670 fip->update_mac(lport, mac); 671 } 672 /* fall through */ 673 case ELS_LS_RJT: 674 op = fr_encaps(fp); 675 if (op) 676 break; 677 return 0; 678 default: 679 if (fip->state != FIP_ST_ENABLED && 680 fip->state != FIP_ST_VNMP_UP) 681 goto drop; 682 return 0; 683 } 684 LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n", 685 op, ntoh24(fh->fh_d_id)); 686 if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id))) 687 goto drop; 688 fip->send(fip, skb); 689 return -EINPROGRESS; 690 drop: 691 kfree_skb(skb); 692 return -EINVAL; 693 } 694 EXPORT_SYMBOL(fcoe_ctlr_els_send); 695 696 /** 697 * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller 698 * @fip: The FCoE controller to free FCFs on 699 * 700 * Called with lock held and preemption disabled. 701 * 702 * An FCF is considered old if we have missed two advertisements. 703 * That is, there have been no valid advertisement from it for 2.5 704 * times its keep-alive period. 705 * 706 * In addition, determine the time when an FCF selection can occur. 707 * 708 * Also, increment the MissDiscAdvCount when no advertisement is received 709 * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB). 710 * 711 * Returns the time in jiffies for the next call. 712 */ 713 static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) 714 { 715 struct fcoe_fcf *fcf; 716 struct fcoe_fcf *next; 717 unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); 718 unsigned long deadline; 719 unsigned long sel_time = 0; 720 struct fcoe_dev_stats *stats; 721 722 stats = per_cpu_ptr(fip->lp->dev_stats, get_cpu()); 723 724 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { 725 deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2; 726 if (fip->sel_fcf == fcf) { 727 if (time_after(jiffies, deadline)) { 728 stats->MissDiscAdvCount++; 729 printk(KERN_INFO "libfcoe: host%d: " 730 "Missing Discovery Advertisement " 731 "for fab %16.16llx count %lld\n", 732 fip->lp->host->host_no, fcf->fabric_name, 733 stats->MissDiscAdvCount); 734 } else if (time_after(next_timer, deadline)) 735 next_timer = deadline; 736 } 737 738 deadline += fcf->fka_period; 739 if (time_after_eq(jiffies, deadline)) { 740 if (fip->sel_fcf == fcf) 741 fip->sel_fcf = NULL; 742 list_del(&fcf->list); 743 WARN_ON(!fip->fcf_count); 744 fip->fcf_count--; 745 kfree(fcf); 746 stats->VLinkFailureCount++; 747 } else { 748 if (time_after(next_timer, deadline)) 749 next_timer = deadline; 750 if (fcoe_ctlr_mtu_valid(fcf) && 751 (!sel_time || time_before(sel_time, fcf->time))) 752 sel_time = fcf->time; 753 } 754 } 755 put_cpu(); 756 if (sel_time && !fip->sel_fcf && !fip->sel_time) { 757 sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); 758 fip->sel_time = sel_time; 759 } 760 761 return next_timer; 762 } 763 764 /** 765 * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry 766 * @fip: The FCoE controller receiving the advertisement 767 * @skb: The received FIP advertisement frame 768 * @fcf: The resulting FCF entry 769 * 770 * Returns zero on a valid parsed advertisement, 771 * otherwise returns non zero value. 772 */ 773 static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip, 774 struct sk_buff *skb, struct fcoe_fcf *fcf) 775 { 776 struct fip_header *fiph; 777 struct fip_desc *desc = NULL; 778 struct fip_wwn_desc *wwn; 779 struct fip_fab_desc *fab; 780 struct fip_fka_desc *fka; 781 unsigned long t; 782 size_t rlen; 783 size_t dlen; 784 u32 desc_mask; 785 786 memset(fcf, 0, sizeof(*fcf)); 787 fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); 788 789 fiph = (struct fip_header *)skb->data; 790 fcf->flags = ntohs(fiph->fip_flags); 791 792 /* 793 * mask of required descriptors. validating each one clears its bit. 794 */ 795 desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | 796 BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA); 797 798 rlen = ntohs(fiph->fip_dl_len) * 4; 799 if (rlen + sizeof(*fiph) > skb->len) 800 return -EINVAL; 801 802 desc = (struct fip_desc *)(fiph + 1); 803 while (rlen > 0) { 804 dlen = desc->fip_dlen * FIP_BPW; 805 if (dlen < sizeof(*desc) || dlen > rlen) 806 return -EINVAL; 807 /* Drop Adv if there are duplicate critical descriptors */ 808 if ((desc->fip_dtype < 32) && 809 !(desc_mask & 1U << desc->fip_dtype)) { 810 LIBFCOE_FIP_DBG(fip, "Duplicate Critical " 811 "Descriptors in FIP adv\n"); 812 return -EINVAL; 813 } 814 switch (desc->fip_dtype) { 815 case FIP_DT_PRI: 816 if (dlen != sizeof(struct fip_pri_desc)) 817 goto len_err; 818 fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; 819 desc_mask &= ~BIT(FIP_DT_PRI); 820 break; 821 case FIP_DT_MAC: 822 if (dlen != sizeof(struct fip_mac_desc)) 823 goto len_err; 824 memcpy(fcf->fcf_mac, 825 ((struct fip_mac_desc *)desc)->fd_mac, 826 ETH_ALEN); 827 memcpy(fcf->fcoe_mac, fcf->fcf_mac, ETH_ALEN); 828 if (!is_valid_ether_addr(fcf->fcf_mac)) { 829 LIBFCOE_FIP_DBG(fip, 830 "Invalid MAC addr %pM in FIP adv\n", 831 fcf->fcf_mac); 832 return -EINVAL; 833 } 834 desc_mask &= ~BIT(FIP_DT_MAC); 835 break; 836 case FIP_DT_NAME: 837 if (dlen != sizeof(struct fip_wwn_desc)) 838 goto len_err; 839 wwn = (struct fip_wwn_desc *)desc; 840 fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); 841 desc_mask &= ~BIT(FIP_DT_NAME); 842 break; 843 case FIP_DT_FAB: 844 if (dlen != sizeof(struct fip_fab_desc)) 845 goto len_err; 846 fab = (struct fip_fab_desc *)desc; 847 fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); 848 fcf->vfid = ntohs(fab->fd_vfid); 849 fcf->fc_map = ntoh24(fab->fd_map); 850 desc_mask &= ~BIT(FIP_DT_FAB); 851 break; 852 case FIP_DT_FKA: 853 if (dlen != sizeof(struct fip_fka_desc)) 854 goto len_err; 855 fka = (struct fip_fka_desc *)desc; 856 if (fka->fd_flags & FIP_FKA_ADV_D) 857 fcf->fd_flags = 1; 858 t = ntohl(fka->fd_fka_period); 859 if (t >= FCOE_CTLR_MIN_FKA) 860 fcf->fka_period = msecs_to_jiffies(t); 861 desc_mask &= ~BIT(FIP_DT_FKA); 862 break; 863 case FIP_DT_MAP_OUI: 864 case FIP_DT_FCOE_SIZE: 865 case FIP_DT_FLOGI: 866 case FIP_DT_FDISC: 867 case FIP_DT_LOGO: 868 case FIP_DT_ELP: 869 default: 870 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " 871 "in FIP adv\n", desc->fip_dtype); 872 /* standard says ignore unknown descriptors >= 128 */ 873 if (desc->fip_dtype < FIP_DT_VENDOR_BASE) 874 return -EINVAL; 875 break; 876 } 877 desc = (struct fip_desc *)((char *)desc + dlen); 878 rlen -= dlen; 879 } 880 if (!fcf->fc_map || (fcf->fc_map & 0x10000)) 881 return -EINVAL; 882 if (!fcf->switch_name) 883 return -EINVAL; 884 if (desc_mask) { 885 LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n", 886 desc_mask); 887 return -EINVAL; 888 } 889 return 0; 890 891 len_err: 892 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", 893 desc->fip_dtype, dlen); 894 return -EINVAL; 895 } 896 897 /** 898 * fcoe_ctlr_recv_adv() - Handle an incoming advertisement 899 * @fip: The FCoE controller receiving the advertisement 900 * @skb: The received FIP packet 901 */ 902 static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) 903 { 904 struct fcoe_fcf *fcf; 905 struct fcoe_fcf new; 906 struct fcoe_fcf *found; 907 unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); 908 int first = 0; 909 int mtu_valid; 910 911 if (fcoe_ctlr_parse_adv(fip, skb, &new)) 912 return; 913 914 mutex_lock(&fip->ctlr_mutex); 915 first = list_empty(&fip->fcfs); 916 found = NULL; 917 list_for_each_entry(fcf, &fip->fcfs, list) { 918 if (fcf->switch_name == new.switch_name && 919 fcf->fabric_name == new.fabric_name && 920 fcf->fc_map == new.fc_map && 921 compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) { 922 found = fcf; 923 break; 924 } 925 } 926 if (!found) { 927 if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) 928 goto out; 929 930 fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); 931 if (!fcf) 932 goto out; 933 934 fip->fcf_count++; 935 memcpy(fcf, &new, sizeof(new)); 936 list_add(&fcf->list, &fip->fcfs); 937 } else { 938 /* 939 * Update the FCF's keep-alive descriptor flags. 940 * Other flag changes from new advertisements are 941 * ignored after a solicited advertisement is 942 * received and the FCF is selectable (usable). 943 */ 944 fcf->fd_flags = new.fd_flags; 945 if (!fcoe_ctlr_fcf_usable(fcf)) 946 fcf->flags = new.flags; 947 948 if (fcf == fip->sel_fcf && !fcf->fd_flags) { 949 fip->ctlr_ka_time -= fcf->fka_period; 950 fip->ctlr_ka_time += new.fka_period; 951 if (time_before(fip->ctlr_ka_time, fip->timer.expires)) 952 mod_timer(&fip->timer, fip->ctlr_ka_time); 953 } 954 fcf->fka_period = new.fka_period; 955 memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); 956 } 957 mtu_valid = fcoe_ctlr_mtu_valid(fcf); 958 fcf->time = jiffies; 959 if (!found) 960 LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n", 961 fcf->fabric_name, fcf->fcf_mac); 962 963 /* 964 * If this advertisement is not solicited and our max receive size 965 * hasn't been verified, send a solicited advertisement. 966 */ 967 if (!mtu_valid) 968 fcoe_ctlr_solicit(fip, fcf); 969 970 /* 971 * If its been a while since we did a solicit, and this is 972 * the first advertisement we've received, do a multicast 973 * solicitation to gather as many advertisements as we can 974 * before selection occurs. 975 */ 976 if (first && time_after(jiffies, fip->sol_time + sol_tov)) 977 fcoe_ctlr_solicit(fip, NULL); 978 979 /* 980 * Put this FCF at the head of the list for priority among equals. 981 * This helps in the case of an NPV switch which insists we use 982 * the FCF that answers multicast solicitations, not the others that 983 * are sending periodic multicast advertisements. 984 */ 985 if (mtu_valid) 986 list_move(&fcf->list, &fip->fcfs); 987 988 /* 989 * If this is the first validated FCF, note the time and 990 * set a timer to trigger selection. 991 */ 992 if (mtu_valid && !fip->sel_fcf && fcoe_ctlr_fcf_usable(fcf)) { 993 fip->sel_time = jiffies + 994 msecs_to_jiffies(FCOE_CTLR_START_DELAY); 995 if (!timer_pending(&fip->timer) || 996 time_before(fip->sel_time, fip->timer.expires)) 997 mod_timer(&fip->timer, fip->sel_time); 998 } 999 out: 1000 mutex_unlock(&fip->ctlr_mutex); 1001 } 1002 1003 /** 1004 * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame 1005 * @fip: The FCoE controller which received the packet 1006 * @skb: The received FIP packet 1007 */ 1008 static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) 1009 { 1010 struct fc_lport *lport = fip->lp; 1011 struct fip_header *fiph; 1012 struct fc_frame *fp = (struct fc_frame *)skb; 1013 struct fc_frame_header *fh = NULL; 1014 struct fip_desc *desc; 1015 struct fip_encaps *els; 1016 struct fcoe_dev_stats *stats; 1017 struct fcoe_fcf *sel; 1018 enum fip_desc_type els_dtype = 0; 1019 u8 els_op; 1020 u8 sub; 1021 u8 granted_mac[ETH_ALEN] = { 0 }; 1022 size_t els_len = 0; 1023 size_t rlen; 1024 size_t dlen; 1025 u32 desc_mask = 0; 1026 u32 desc_cnt = 0; 1027 1028 fiph = (struct fip_header *)skb->data; 1029 sub = fiph->fip_subcode; 1030 if (sub != FIP_SC_REQ && sub != FIP_SC_REP) 1031 goto drop; 1032 1033 rlen = ntohs(fiph->fip_dl_len) * 4; 1034 if (rlen + sizeof(*fiph) > skb->len) 1035 goto drop; 1036 1037 desc = (struct fip_desc *)(fiph + 1); 1038 while (rlen > 0) { 1039 desc_cnt++; 1040 dlen = desc->fip_dlen * FIP_BPW; 1041 if (dlen < sizeof(*desc) || dlen > rlen) 1042 goto drop; 1043 /* Drop ELS if there are duplicate critical descriptors */ 1044 if (desc->fip_dtype < 32) { 1045 if ((desc->fip_dtype != FIP_DT_MAC) && 1046 (desc_mask & 1U << desc->fip_dtype)) { 1047 LIBFCOE_FIP_DBG(fip, "Duplicate Critical " 1048 "Descriptors in FIP ELS\n"); 1049 goto drop; 1050 } 1051 desc_mask |= (1 << desc->fip_dtype); 1052 } 1053 switch (desc->fip_dtype) { 1054 case FIP_DT_MAC: 1055 sel = fip->sel_fcf; 1056 if (desc_cnt == 1) { 1057 LIBFCOE_FIP_DBG(fip, "FIP descriptors " 1058 "received out of order\n"); 1059 goto drop; 1060 } 1061 /* 1062 * Some switch implementations send two MAC descriptors, 1063 * with first MAC(granted_mac) being the FPMA, and the 1064 * second one(fcoe_mac) is used as destination address 1065 * for sending/receiving FCoE packets. FIP traffic is 1066 * sent using fip_mac. For regular switches, both 1067 * fip_mac and fcoe_mac would be the same. 1068 */ 1069 if (desc_cnt == 2) 1070 memcpy(granted_mac, 1071 ((struct fip_mac_desc *)desc)->fd_mac, 1072 ETH_ALEN); 1073 1074 if (dlen != sizeof(struct fip_mac_desc)) 1075 goto len_err; 1076 1077 if ((desc_cnt == 3) && (sel)) 1078 memcpy(sel->fcoe_mac, 1079 ((struct fip_mac_desc *)desc)->fd_mac, 1080 ETH_ALEN); 1081 break; 1082 case FIP_DT_FLOGI: 1083 case FIP_DT_FDISC: 1084 case FIP_DT_LOGO: 1085 case FIP_DT_ELP: 1086 if (desc_cnt != 1) { 1087 LIBFCOE_FIP_DBG(fip, "FIP descriptors " 1088 "received out of order\n"); 1089 goto drop; 1090 } 1091 if (fh) 1092 goto drop; 1093 if (dlen < sizeof(*els) + sizeof(*fh) + 1) 1094 goto len_err; 1095 els_len = dlen - sizeof(*els); 1096 els = (struct fip_encaps *)desc; 1097 fh = (struct fc_frame_header *)(els + 1); 1098 els_dtype = desc->fip_dtype; 1099 break; 1100 default: 1101 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " 1102 "in FIP adv\n", desc->fip_dtype); 1103 /* standard says ignore unknown descriptors >= 128 */ 1104 if (desc->fip_dtype < FIP_DT_VENDOR_BASE) 1105 goto drop; 1106 if (desc_cnt <= 2) { 1107 LIBFCOE_FIP_DBG(fip, "FIP descriptors " 1108 "received out of order\n"); 1109 goto drop; 1110 } 1111 break; 1112 } 1113 desc = (struct fip_desc *)((char *)desc + dlen); 1114 rlen -= dlen; 1115 } 1116 1117 if (!fh) 1118 goto drop; 1119 els_op = *(u8 *)(fh + 1); 1120 1121 if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) && 1122 sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) { 1123 if (els_op == ELS_LS_ACC) { 1124 if (!is_valid_ether_addr(granted_mac)) { 1125 LIBFCOE_FIP_DBG(fip, 1126 "Invalid MAC address %pM in FIP ELS\n", 1127 granted_mac); 1128 goto drop; 1129 } 1130 memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); 1131 1132 if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) { 1133 fip->flogi_oxid = FC_XID_UNKNOWN; 1134 if (els_dtype == FIP_DT_FLOGI) 1135 fcoe_ctlr_announce(fip); 1136 } 1137 } else if (els_dtype == FIP_DT_FLOGI && 1138 !fcoe_ctlr_flogi_retry(fip)) 1139 goto drop; /* retrying FLOGI so drop reject */ 1140 } 1141 1142 if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) && 1143 (!(1U << FIP_DT_MAC & desc_mask)))) { 1144 LIBFCOE_FIP_DBG(fip, "Missing critical descriptors " 1145 "in FIP ELS\n"); 1146 goto drop; 1147 } 1148 1149 /* 1150 * Convert skb into an fc_frame containing only the ELS. 1151 */ 1152 skb_pull(skb, (u8 *)fh - skb->data); 1153 skb_trim(skb, els_len); 1154 fp = (struct fc_frame *)skb; 1155 fc_frame_init(fp); 1156 fr_sof(fp) = FC_SOF_I3; 1157 fr_eof(fp) = FC_EOF_T; 1158 fr_dev(fp) = lport; 1159 fr_encaps(fp) = els_dtype; 1160 1161 stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 1162 stats->RxFrames++; 1163 stats->RxWords += skb->len / FIP_BPW; 1164 put_cpu(); 1165 1166 fc_exch_recv(lport, fp); 1167 return; 1168 1169 len_err: 1170 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", 1171 desc->fip_dtype, dlen); 1172 drop: 1173 kfree_skb(skb); 1174 } 1175 1176 /** 1177 * fcoe_ctlr_recv_els() - Handle an incoming link reset frame 1178 * @fip: The FCoE controller that received the frame 1179 * @fh: The received FIP header 1180 * 1181 * There may be multiple VN_Port descriptors. 1182 * The overall length has already been checked. 1183 */ 1184 static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, 1185 struct fip_header *fh) 1186 { 1187 struct fip_desc *desc; 1188 struct fip_mac_desc *mp; 1189 struct fip_wwn_desc *wp; 1190 struct fip_vn_desc *vp; 1191 size_t rlen; 1192 size_t dlen; 1193 struct fcoe_fcf *fcf = fip->sel_fcf; 1194 struct fc_lport *lport = fip->lp; 1195 struct fc_lport *vn_port = NULL; 1196 u32 desc_mask; 1197 int num_vlink_desc; 1198 int reset_phys_port = 0; 1199 struct fip_vn_desc **vlink_desc_arr = NULL; 1200 1201 LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); 1202 1203 if (!fcf || !lport->port_id) 1204 return; 1205 1206 /* 1207 * mask of required descriptors. Validating each one clears its bit. 1208 */ 1209 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME); 1210 1211 rlen = ntohs(fh->fip_dl_len) * FIP_BPW; 1212 desc = (struct fip_desc *)(fh + 1); 1213 1214 /* 1215 * Actually need to subtract 'sizeof(*mp) - sizeof(*wp)' from 'rlen' 1216 * before determining max Vx_Port descriptor but a buggy FCF could have 1217 * omited either or both MAC Address and Name Identifier descriptors 1218 */ 1219 num_vlink_desc = rlen / sizeof(*vp); 1220 if (num_vlink_desc) 1221 vlink_desc_arr = kmalloc(sizeof(vp) * num_vlink_desc, 1222 GFP_ATOMIC); 1223 if (!vlink_desc_arr) 1224 return; 1225 num_vlink_desc = 0; 1226 1227 while (rlen >= sizeof(*desc)) { 1228 dlen = desc->fip_dlen * FIP_BPW; 1229 if (dlen > rlen) 1230 goto err; 1231 /* Drop CVL if there are duplicate critical descriptors */ 1232 if ((desc->fip_dtype < 32) && 1233 (desc->fip_dtype != FIP_DT_VN_ID) && 1234 !(desc_mask & 1U << desc->fip_dtype)) { 1235 LIBFCOE_FIP_DBG(fip, "Duplicate Critical " 1236 "Descriptors in FIP CVL\n"); 1237 goto err; 1238 } 1239 switch (desc->fip_dtype) { 1240 case FIP_DT_MAC: 1241 mp = (struct fip_mac_desc *)desc; 1242 if (dlen < sizeof(*mp)) 1243 goto err; 1244 if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac)) 1245 goto err; 1246 desc_mask &= ~BIT(FIP_DT_MAC); 1247 break; 1248 case FIP_DT_NAME: 1249 wp = (struct fip_wwn_desc *)desc; 1250 if (dlen < sizeof(*wp)) 1251 goto err; 1252 if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) 1253 goto err; 1254 desc_mask &= ~BIT(FIP_DT_NAME); 1255 break; 1256 case FIP_DT_VN_ID: 1257 vp = (struct fip_vn_desc *)desc; 1258 if (dlen < sizeof(*vp)) 1259 goto err; 1260 vlink_desc_arr[num_vlink_desc++] = vp; 1261 vn_port = fc_vport_id_lookup(lport, 1262 ntoh24(vp->fd_fc_id)); 1263 if (vn_port && (vn_port == lport)) { 1264 mutex_lock(&fip->ctlr_mutex); 1265 per_cpu_ptr(lport->dev_stats, 1266 get_cpu())->VLinkFailureCount++; 1267 put_cpu(); 1268 fcoe_ctlr_reset(fip); 1269 mutex_unlock(&fip->ctlr_mutex); 1270 } 1271 break; 1272 default: 1273 /* standard says ignore unknown descriptors >= 128 */ 1274 if (desc->fip_dtype < FIP_DT_VENDOR_BASE) 1275 goto err; 1276 break; 1277 } 1278 desc = (struct fip_desc *)((char *)desc + dlen); 1279 rlen -= dlen; 1280 } 1281 1282 /* 1283 * reset only if all required descriptors were present and valid. 1284 */ 1285 if (desc_mask) 1286 LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n", 1287 desc_mask); 1288 else if (!num_vlink_desc) { 1289 LIBFCOE_FIP_DBG(fip, "CVL: no Vx_Port descriptor found\n"); 1290 /* 1291 * No Vx_Port description. Clear all NPIV ports, 1292 * followed by physical port 1293 */ 1294 mutex_lock(&fip->ctlr_mutex); 1295 per_cpu_ptr(lport->dev_stats, 1296 get_cpu())->VLinkFailureCount++; 1297 put_cpu(); 1298 fcoe_ctlr_reset(fip); 1299 mutex_unlock(&fip->ctlr_mutex); 1300 1301 mutex_lock(&lport->lp_mutex); 1302 list_for_each_entry(vn_port, &lport->vports, list) 1303 fc_lport_reset(vn_port); 1304 mutex_unlock(&lport->lp_mutex); 1305 1306 fc_lport_reset(fip->lp); 1307 fcoe_ctlr_solicit(fip, NULL); 1308 } else { 1309 int i; 1310 1311 LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n"); 1312 for (i = 0; i < num_vlink_desc; i++) { 1313 vp = vlink_desc_arr[i]; 1314 vn_port = fc_vport_id_lookup(lport, 1315 ntoh24(vp->fd_fc_id)); 1316 if (!vn_port) 1317 continue; 1318 1319 /* 1320 * 'port_id' is already validated, check MAC address and 1321 * wwpn 1322 */ 1323 if (compare_ether_addr(fip->get_src_addr(vn_port), 1324 vp->fd_mac) != 0 || 1325 get_unaligned_be64(&vp->fd_wwpn) != 1326 vn_port->wwpn) 1327 continue; 1328 1329 if (vn_port == lport) 1330 /* 1331 * Physical port, defer processing till all 1332 * listed NPIV ports are cleared 1333 */ 1334 reset_phys_port = 1; 1335 else /* NPIV port */ 1336 fc_lport_reset(vn_port); 1337 } 1338 1339 if (reset_phys_port) { 1340 fc_lport_reset(fip->lp); 1341 fcoe_ctlr_solicit(fip, NULL); 1342 } 1343 } 1344 1345 err: 1346 kfree(vlink_desc_arr); 1347 } 1348 1349 /** 1350 * fcoe_ctlr_recv() - Receive a FIP packet 1351 * @fip: The FCoE controller that received the packet 1352 * @skb: The received FIP packet 1353 * 1354 * This may be called from either NET_RX_SOFTIRQ or IRQ. 1355 */ 1356 void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) 1357 { 1358 skb_queue_tail(&fip->fip_recv_list, skb); 1359 schedule_work(&fip->recv_work); 1360 } 1361 EXPORT_SYMBOL(fcoe_ctlr_recv); 1362 1363 /** 1364 * fcoe_ctlr_recv_handler() - Receive a FIP frame 1365 * @fip: The FCoE controller that received the frame 1366 * @skb: The received FIP frame 1367 * 1368 * Returns non-zero if the frame is dropped. 1369 */ 1370 static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) 1371 { 1372 struct fip_header *fiph; 1373 struct ethhdr *eh; 1374 enum fip_state state; 1375 u16 op; 1376 u8 sub; 1377 1378 if (skb_linearize(skb)) 1379 goto drop; 1380 if (skb->len < sizeof(*fiph)) 1381 goto drop; 1382 eh = eth_hdr(skb); 1383 if (fip->mode == FIP_MODE_VN2VN) { 1384 if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && 1385 compare_ether_addr(eh->h_dest, fcoe_all_vn2vn) && 1386 compare_ether_addr(eh->h_dest, fcoe_all_p2p)) 1387 goto drop; 1388 } else if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && 1389 compare_ether_addr(eh->h_dest, fcoe_all_enode)) 1390 goto drop; 1391 fiph = (struct fip_header *)skb->data; 1392 op = ntohs(fiph->fip_op); 1393 sub = fiph->fip_subcode; 1394 1395 if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) 1396 goto drop; 1397 if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) 1398 goto drop; 1399 1400 mutex_lock(&fip->ctlr_mutex); 1401 state = fip->state; 1402 if (state == FIP_ST_AUTO) { 1403 fip->map_dest = 0; 1404 fcoe_ctlr_set_state(fip, FIP_ST_ENABLED); 1405 state = FIP_ST_ENABLED; 1406 LIBFCOE_FIP_DBG(fip, "Using FIP mode\n"); 1407 } 1408 mutex_unlock(&fip->ctlr_mutex); 1409 1410 if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN) 1411 return fcoe_ctlr_vn_recv(fip, skb); 1412 1413 if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP && 1414 state != FIP_ST_VNMP_CLAIM) 1415 goto drop; 1416 1417 if (op == FIP_OP_LS) { 1418 fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ 1419 return 0; 1420 } 1421 1422 if (state != FIP_ST_ENABLED) 1423 goto drop; 1424 1425 if (op == FIP_OP_DISC && sub == FIP_SC_ADV) 1426 fcoe_ctlr_recv_adv(fip, skb); 1427 else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) 1428 fcoe_ctlr_recv_clr_vlink(fip, fiph); 1429 kfree_skb(skb); 1430 return 0; 1431 drop: 1432 kfree_skb(skb); 1433 return -1; 1434 } 1435 1436 /** 1437 * fcoe_ctlr_select() - Select the best FCF (if possible) 1438 * @fip: The FCoE controller 1439 * 1440 * Returns the selected FCF, or NULL if none are usable. 1441 * 1442 * If there are conflicting advertisements, no FCF can be chosen. 1443 * 1444 * If there is already a selected FCF, this will choose a better one or 1445 * an equivalent one that hasn't already been sent a FLOGI. 1446 * 1447 * Called with lock held. 1448 */ 1449 static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip) 1450 { 1451 struct fcoe_fcf *fcf; 1452 struct fcoe_fcf *best = fip->sel_fcf; 1453 struct fcoe_fcf *first; 1454 1455 first = list_first_entry(&fip->fcfs, struct fcoe_fcf, list); 1456 1457 list_for_each_entry(fcf, &fip->fcfs, list) { 1458 LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx " 1459 "VFID %d mac %pM map %x val %d " 1460 "sent %u pri %u\n", 1461 fcf->fabric_name, fcf->vfid, fcf->fcf_mac, 1462 fcf->fc_map, fcoe_ctlr_mtu_valid(fcf), 1463 fcf->flogi_sent, fcf->pri); 1464 if (fcf->fabric_name != first->fabric_name || 1465 fcf->vfid != first->vfid || 1466 fcf->fc_map != first->fc_map) { 1467 LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " 1468 "or FC-MAP\n"); 1469 return NULL; 1470 } 1471 if (fcf->flogi_sent) 1472 continue; 1473 if (!fcoe_ctlr_fcf_usable(fcf)) { 1474 LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx " 1475 "map %x %svalid %savailable\n", 1476 fcf->fabric_name, fcf->fc_map, 1477 (fcf->flags & FIP_FL_SOL) ? "" : "in", 1478 (fcf->flags & FIP_FL_AVAIL) ? 1479 "" : "un"); 1480 continue; 1481 } 1482 if (!best || fcf->pri < best->pri || best->flogi_sent) 1483 best = fcf; 1484 } 1485 fip->sel_fcf = best; 1486 if (best) { 1487 LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac); 1488 fip->port_ka_time = jiffies + 1489 msecs_to_jiffies(FIP_VN_KA_PERIOD); 1490 fip->ctlr_ka_time = jiffies + best->fka_period; 1491 if (time_before(fip->ctlr_ka_time, fip->timer.expires)) 1492 mod_timer(&fip->timer, fip->ctlr_ka_time); 1493 } 1494 return best; 1495 } 1496 1497 /** 1498 * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF 1499 * @fip: The FCoE controller 1500 * 1501 * Returns non-zero error if it could not be sent. 1502 * 1503 * Called with ctlr_mutex and ctlr_lock held. 1504 * Caller must verify that fip->sel_fcf is not NULL. 1505 */ 1506 static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip) 1507 { 1508 struct sk_buff *skb; 1509 struct sk_buff *skb_orig; 1510 struct fc_frame_header *fh; 1511 int error; 1512 1513 skb_orig = fip->flogi_req; 1514 if (!skb_orig) 1515 return -EINVAL; 1516 1517 /* 1518 * Clone and send the FLOGI request. If clone fails, use original. 1519 */ 1520 skb = skb_clone(skb_orig, GFP_ATOMIC); 1521 if (!skb) { 1522 skb = skb_orig; 1523 fip->flogi_req = NULL; 1524 } 1525 fh = (struct fc_frame_header *)skb->data; 1526 error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb, 1527 ntoh24(fh->fh_d_id)); 1528 if (error) { 1529 kfree_skb(skb); 1530 return error; 1531 } 1532 fip->send(fip, skb); 1533 fip->sel_fcf->flogi_sent = 1; 1534 return 0; 1535 } 1536 1537 /** 1538 * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible 1539 * @fip: The FCoE controller 1540 * 1541 * Returns non-zero error code if there's no FLOGI request to retry or 1542 * no alternate FCF available. 1543 */ 1544 static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip) 1545 { 1546 struct fcoe_fcf *fcf; 1547 int error; 1548 1549 mutex_lock(&fip->ctlr_mutex); 1550 spin_lock_bh(&fip->ctlr_lock); 1551 LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n"); 1552 fcf = fcoe_ctlr_select(fip); 1553 if (!fcf || fcf->flogi_sent) { 1554 kfree_skb(fip->flogi_req); 1555 fip->flogi_req = NULL; 1556 error = -ENOENT; 1557 } else { 1558 fcoe_ctlr_solicit(fip, NULL); 1559 error = fcoe_ctlr_flogi_send_locked(fip); 1560 } 1561 spin_unlock_bh(&fip->ctlr_lock); 1562 mutex_unlock(&fip->ctlr_mutex); 1563 return error; 1564 } 1565 1566 1567 /** 1568 * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI. 1569 * @fip: The FCoE controller that timed out 1570 * 1571 * Done here because fcoe_ctlr_els_send() can't get mutex. 1572 * 1573 * Called with ctlr_mutex held. The caller must not hold ctlr_lock. 1574 */ 1575 static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip) 1576 { 1577 struct fcoe_fcf *fcf; 1578 1579 spin_lock_bh(&fip->ctlr_lock); 1580 fcf = fip->sel_fcf; 1581 if (!fcf || !fip->flogi_req_send) 1582 goto unlock; 1583 1584 LIBFCOE_FIP_DBG(fip, "sending FLOGI\n"); 1585 1586 /* 1587 * If this FLOGI is being sent due to a timeout retry 1588 * to the same FCF as before, select a different FCF if possible. 1589 */ 1590 if (fcf->flogi_sent) { 1591 LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n"); 1592 fcf = fcoe_ctlr_select(fip); 1593 if (!fcf || fcf->flogi_sent) { 1594 LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n"); 1595 list_for_each_entry(fcf, &fip->fcfs, list) 1596 fcf->flogi_sent = 0; 1597 fcf = fcoe_ctlr_select(fip); 1598 } 1599 } 1600 if (fcf) { 1601 fcoe_ctlr_flogi_send_locked(fip); 1602 fip->flogi_req_send = 0; 1603 } else /* XXX */ 1604 LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n"); 1605 unlock: 1606 spin_unlock_bh(&fip->ctlr_lock); 1607 } 1608 1609 /** 1610 * fcoe_ctlr_timeout() - FIP timeout handler 1611 * @arg: The FCoE controller that timed out 1612 */ 1613 static void fcoe_ctlr_timeout(unsigned long arg) 1614 { 1615 struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg; 1616 1617 schedule_work(&fip->timer_work); 1618 } 1619 1620 /** 1621 * fcoe_ctlr_timer_work() - Worker thread function for timer work 1622 * @work: Handle to a FCoE controller 1623 * 1624 * Ages FCFs. Triggers FCF selection if possible. 1625 * Sends keep-alives and resets. 1626 */ 1627 static void fcoe_ctlr_timer_work(struct work_struct *work) 1628 { 1629 struct fcoe_ctlr *fip; 1630 struct fc_lport *vport; 1631 u8 *mac; 1632 u8 reset = 0; 1633 u8 send_ctlr_ka = 0; 1634 u8 send_port_ka = 0; 1635 struct fcoe_fcf *sel; 1636 struct fcoe_fcf *fcf; 1637 unsigned long next_timer; 1638 1639 fip = container_of(work, struct fcoe_ctlr, timer_work); 1640 if (fip->mode == FIP_MODE_VN2VN) 1641 return fcoe_ctlr_vn_timeout(fip); 1642 mutex_lock(&fip->ctlr_mutex); 1643 if (fip->state == FIP_ST_DISABLED) { 1644 mutex_unlock(&fip->ctlr_mutex); 1645 return; 1646 } 1647 1648 fcf = fip->sel_fcf; 1649 next_timer = fcoe_ctlr_age_fcfs(fip); 1650 1651 sel = fip->sel_fcf; 1652 if (!sel && fip->sel_time) { 1653 if (time_after_eq(jiffies, fip->sel_time)) { 1654 sel = fcoe_ctlr_select(fip); 1655 fip->sel_time = 0; 1656 } else if (time_after(next_timer, fip->sel_time)) 1657 next_timer = fip->sel_time; 1658 } 1659 1660 if (sel && fip->flogi_req_send) 1661 fcoe_ctlr_flogi_send(fip); 1662 else if (!sel && fcf) 1663 reset = 1; 1664 1665 if (sel && !sel->fd_flags) { 1666 if (time_after_eq(jiffies, fip->ctlr_ka_time)) { 1667 fip->ctlr_ka_time = jiffies + sel->fka_period; 1668 send_ctlr_ka = 1; 1669 } 1670 if (time_after(next_timer, fip->ctlr_ka_time)) 1671 next_timer = fip->ctlr_ka_time; 1672 1673 if (time_after_eq(jiffies, fip->port_ka_time)) { 1674 fip->port_ka_time = jiffies + 1675 msecs_to_jiffies(FIP_VN_KA_PERIOD); 1676 send_port_ka = 1; 1677 } 1678 if (time_after(next_timer, fip->port_ka_time)) 1679 next_timer = fip->port_ka_time; 1680 } 1681 if (!list_empty(&fip->fcfs)) 1682 mod_timer(&fip->timer, next_timer); 1683 mutex_unlock(&fip->ctlr_mutex); 1684 1685 if (reset) { 1686 fc_lport_reset(fip->lp); 1687 /* restart things with a solicitation */ 1688 fcoe_ctlr_solicit(fip, NULL); 1689 } 1690 1691 if (send_ctlr_ka) 1692 fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr); 1693 1694 if (send_port_ka) { 1695 mutex_lock(&fip->lp->lp_mutex); 1696 mac = fip->get_src_addr(fip->lp); 1697 fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); 1698 list_for_each_entry(vport, &fip->lp->vports, list) { 1699 mac = fip->get_src_addr(vport); 1700 fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); 1701 } 1702 mutex_unlock(&fip->lp->lp_mutex); 1703 } 1704 } 1705 1706 /** 1707 * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames 1708 * @recv_work: Handle to a FCoE controller 1709 */ 1710 static void fcoe_ctlr_recv_work(struct work_struct *recv_work) 1711 { 1712 struct fcoe_ctlr *fip; 1713 struct sk_buff *skb; 1714 1715 fip = container_of(recv_work, struct fcoe_ctlr, recv_work); 1716 while ((skb = skb_dequeue(&fip->fip_recv_list))) 1717 fcoe_ctlr_recv_handler(fip, skb); 1718 } 1719 1720 /** 1721 * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response 1722 * @fip: The FCoE controller 1723 * @fp: The FC frame to snoop 1724 * 1725 * Snoop potential response to FLOGI or even incoming FLOGI. 1726 * 1727 * The caller has checked that we are waiting for login as indicated 1728 * by fip->flogi_oxid != FC_XID_UNKNOWN. 1729 * 1730 * The caller is responsible for freeing the frame. 1731 * Fill in the granted_mac address. 1732 * 1733 * Return non-zero if the frame should not be delivered to libfc. 1734 */ 1735 int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, 1736 struct fc_frame *fp) 1737 { 1738 struct fc_frame_header *fh; 1739 u8 op; 1740 u8 *sa; 1741 1742 sa = eth_hdr(&fp->skb)->h_source; 1743 fh = fc_frame_header_get(fp); 1744 if (fh->fh_type != FC_TYPE_ELS) 1745 return 0; 1746 1747 op = fc_frame_payload_op(fp); 1748 if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && 1749 fip->flogi_oxid == ntohs(fh->fh_ox_id)) { 1750 1751 mutex_lock(&fip->ctlr_mutex); 1752 if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { 1753 mutex_unlock(&fip->ctlr_mutex); 1754 return -EINVAL; 1755 } 1756 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); 1757 LIBFCOE_FIP_DBG(fip, 1758 "received FLOGI LS_ACC using non-FIP mode\n"); 1759 1760 /* 1761 * FLOGI accepted. 1762 * If the src mac addr is FC_OUI-based, then we mark the 1763 * address_mode flag to use FC_OUI-based Ethernet DA. 1764 * Otherwise we use the FCoE gateway addr 1765 */ 1766 if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { 1767 fcoe_ctlr_map_dest(fip); 1768 } else { 1769 memcpy(fip->dest_addr, sa, ETH_ALEN); 1770 fip->map_dest = 0; 1771 } 1772 fip->flogi_oxid = FC_XID_UNKNOWN; 1773 mutex_unlock(&fip->ctlr_mutex); 1774 fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id); 1775 } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { 1776 /* 1777 * Save source MAC for point-to-point responses. 1778 */ 1779 mutex_lock(&fip->ctlr_mutex); 1780 if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { 1781 memcpy(fip->dest_addr, sa, ETH_ALEN); 1782 fip->map_dest = 0; 1783 if (fip->state == FIP_ST_AUTO) 1784 LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. " 1785 "Setting non-FIP mode\n"); 1786 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); 1787 } 1788 mutex_unlock(&fip->ctlr_mutex); 1789 } 1790 return 0; 1791 } 1792 EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); 1793 1794 /** 1795 * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN 1796 * @mac: The MAC address to convert 1797 * @scheme: The scheme to use when converting 1798 * @port: The port indicator for converting 1799 * 1800 * Returns: u64 fc world wide name 1801 */ 1802 u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], 1803 unsigned int scheme, unsigned int port) 1804 { 1805 u64 wwn; 1806 u64 host_mac; 1807 1808 /* The MAC is in NO, so flip only the low 48 bits */ 1809 host_mac = ((u64) mac[0] << 40) | 1810 ((u64) mac[1] << 32) | 1811 ((u64) mac[2] << 24) | 1812 ((u64) mac[3] << 16) | 1813 ((u64) mac[4] << 8) | 1814 (u64) mac[5]; 1815 1816 WARN_ON(host_mac >= (1ULL << 48)); 1817 wwn = host_mac | ((u64) scheme << 60); 1818 switch (scheme) { 1819 case 1: 1820 WARN_ON(port != 0); 1821 break; 1822 case 2: 1823 WARN_ON(port >= 0xfff); 1824 wwn |= (u64) port << 48; 1825 break; 1826 default: 1827 WARN_ON(1); 1828 break; 1829 } 1830 1831 return wwn; 1832 } 1833 EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); 1834 1835 /** 1836 * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv 1837 * @rdata: libfc remote port 1838 */ 1839 static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata) 1840 { 1841 return (struct fcoe_rport *)(rdata + 1); 1842 } 1843 1844 /** 1845 * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply. 1846 * @fip: The FCoE controller 1847 * @sub: sub-opcode for probe request, reply, or advertisement. 1848 * @dest: The destination Ethernet MAC address 1849 * @min_len: minimum size of the Ethernet payload to be sent 1850 */ 1851 static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip, 1852 enum fip_vn2vn_subcode sub, 1853 const u8 *dest, size_t min_len) 1854 { 1855 struct sk_buff *skb; 1856 struct fip_frame { 1857 struct ethhdr eth; 1858 struct fip_header fip; 1859 struct fip_mac_desc mac; 1860 struct fip_wwn_desc wwnn; 1861 struct fip_vn_desc vn; 1862 } __packed * frame; 1863 struct fip_fc4_feat *ff; 1864 struct fip_size_desc *size; 1865 u32 fcp_feat; 1866 size_t len; 1867 size_t dlen; 1868 1869 len = sizeof(*frame); 1870 dlen = 0; 1871 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { 1872 dlen = sizeof(struct fip_fc4_feat) + 1873 sizeof(struct fip_size_desc); 1874 len += dlen; 1875 } 1876 dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn); 1877 len = max(len, min_len + sizeof(struct ethhdr)); 1878 1879 skb = dev_alloc_skb(len); 1880 if (!skb) 1881 return; 1882 1883 frame = (struct fip_frame *)skb->data; 1884 memset(frame, 0, len); 1885 memcpy(frame->eth.h_dest, dest, ETH_ALEN); 1886 memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN); 1887 frame->eth.h_proto = htons(ETH_P_FIP); 1888 1889 frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); 1890 frame->fip.fip_op = htons(FIP_OP_VN2VN); 1891 frame->fip.fip_subcode = sub; 1892 frame->fip.fip_dl_len = htons(dlen / FIP_BPW); 1893 1894 frame->mac.fd_desc.fip_dtype = FIP_DT_MAC; 1895 frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW; 1896 memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); 1897 1898 frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME; 1899 frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW; 1900 put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn); 1901 1902 frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID; 1903 frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW; 1904 hton24(frame->vn.fd_mac, FIP_VN_FC_MAP); 1905 hton24(frame->vn.fd_mac + 3, fip->port_id); 1906 hton24(frame->vn.fd_fc_id, fip->port_id); 1907 put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn); 1908 1909 /* 1910 * For claims, add FC-4 features. 1911 * TBD: Add interface to get fc-4 types and features from libfc. 1912 */ 1913 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { 1914 ff = (struct fip_fc4_feat *)(frame + 1); 1915 ff->fd_desc.fip_dtype = FIP_DT_FC4F; 1916 ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW; 1917 ff->fd_fts = fip->lp->fcts; 1918 1919 fcp_feat = 0; 1920 if (fip->lp->service_params & FCP_SPPF_INIT_FCN) 1921 fcp_feat |= FCP_FEAT_INIT; 1922 if (fip->lp->service_params & FCP_SPPF_TARG_FCN) 1923 fcp_feat |= FCP_FEAT_TARG; 1924 fcp_feat <<= (FC_TYPE_FCP * 4) % 32; 1925 ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat); 1926 1927 size = (struct fip_size_desc *)(ff + 1); 1928 size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; 1929 size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW; 1930 size->fd_size = htons(fcoe_ctlr_fcoe_size(fip)); 1931 } 1932 1933 skb_put(skb, len); 1934 skb->protocol = htons(ETH_P_FIP); 1935 skb->priority = fip->priority; 1936 skb_reset_mac_header(skb); 1937 skb_reset_network_header(skb); 1938 1939 fip->send(fip, skb); 1940 } 1941 1942 /** 1943 * fcoe_ctlr_vn_rport_callback - Event handler for rport events. 1944 * @lport: The lport which is receiving the event 1945 * @rdata: remote port private data 1946 * @event: The event that occurred 1947 * 1948 * Locking Note: The rport lock must not be held when calling this function. 1949 */ 1950 static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport, 1951 struct fc_rport_priv *rdata, 1952 enum fc_rport_event event) 1953 { 1954 struct fcoe_ctlr *fip = lport->disc.priv; 1955 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); 1956 1957 LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n", 1958 rdata->ids.port_id, event); 1959 1960 mutex_lock(&fip->ctlr_mutex); 1961 switch (event) { 1962 case RPORT_EV_READY: 1963 frport->login_count = 0; 1964 break; 1965 case RPORT_EV_LOGO: 1966 case RPORT_EV_FAILED: 1967 case RPORT_EV_STOP: 1968 frport->login_count++; 1969 if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) { 1970 LIBFCOE_FIP_DBG(fip, 1971 "rport FLOGI limited port_id %6.6x\n", 1972 rdata->ids.port_id); 1973 lport->tt.rport_logoff(rdata); 1974 } 1975 break; 1976 default: 1977 break; 1978 } 1979 mutex_unlock(&fip->ctlr_mutex); 1980 } 1981 1982 static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = { 1983 .event_callback = fcoe_ctlr_vn_rport_callback, 1984 }; 1985 1986 /** 1987 * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode 1988 * @fip: The FCoE controller 1989 * 1990 * Called with ctlr_mutex held. 1991 */ 1992 static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport) 1993 { 1994 mutex_lock(&lport->disc.disc_mutex); 1995 lport->disc.disc_callback = NULL; 1996 mutex_unlock(&lport->disc.disc_mutex); 1997 } 1998 1999 /** 2000 * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode 2001 * @fip: The FCoE controller 2002 * 2003 * Called through the local port template for discovery. 2004 * Called without the ctlr_mutex held. 2005 */ 2006 static void fcoe_ctlr_disc_stop(struct fc_lport *lport) 2007 { 2008 struct fcoe_ctlr *fip = lport->disc.priv; 2009 2010 mutex_lock(&fip->ctlr_mutex); 2011 fcoe_ctlr_disc_stop_locked(lport); 2012 mutex_unlock(&fip->ctlr_mutex); 2013 } 2014 2015 /** 2016 * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode 2017 * @fip: The FCoE controller 2018 * 2019 * Called through the local port template for discovery. 2020 * Called without the ctlr_mutex held. 2021 */ 2022 static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport) 2023 { 2024 fcoe_ctlr_disc_stop(lport); 2025 lport->tt.rport_flush_queue(); 2026 synchronize_rcu(); 2027 } 2028 2029 /** 2030 * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id 2031 * @fip: The FCoE controller 2032 * 2033 * Called with fcoe_ctlr lock held. 2034 */ 2035 static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip) 2036 { 2037 unsigned long wait; 2038 u32 port_id; 2039 2040 fcoe_ctlr_disc_stop_locked(fip->lp); 2041 2042 /* 2043 * Get proposed port ID. 2044 * If this is the first try after link up, use any previous port_id. 2045 * If there was none, use the low bits of the port_name. 2046 * On subsequent tries, get the next random one. 2047 * Don't use reserved IDs, use another non-zero value, just as random. 2048 */ 2049 port_id = fip->port_id; 2050 if (fip->probe_tries) 2051 port_id = prandom32(&fip->rnd_state) & 0xffff; 2052 else if (!port_id) 2053 port_id = fip->lp->wwpn & 0xffff; 2054 if (!port_id || port_id == 0xffff) 2055 port_id = 1; 2056 fip->port_id = port_id; 2057 2058 if (fip->probe_tries < FIP_VN_RLIM_COUNT) { 2059 fip->probe_tries++; 2060 wait = random32() % FIP_VN_PROBE_WAIT; 2061 } else 2062 wait = FIP_VN_RLIM_INT; 2063 mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait)); 2064 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START); 2065 } 2066 2067 /** 2068 * fcoe_ctlr_vn_start() - Start in VN2VN mode 2069 * @fip: The FCoE controller 2070 * 2071 * Called with fcoe_ctlr lock held. 2072 */ 2073 static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip) 2074 { 2075 fip->probe_tries = 0; 2076 prandom32_seed(&fip->rnd_state, fip->lp->wwpn); 2077 fcoe_ctlr_vn_restart(fip); 2078 } 2079 2080 /** 2081 * fcoe_ctlr_vn_parse - parse probe request or response 2082 * @fip: The FCoE controller 2083 * @skb: incoming packet 2084 * @rdata: buffer for resulting parsed VN entry plus fcoe_rport 2085 * 2086 * Returns non-zero error number on error. 2087 * Does not consume the packet. 2088 */ 2089 static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip, 2090 struct sk_buff *skb, 2091 struct fc_rport_priv *rdata) 2092 { 2093 struct fip_header *fiph; 2094 struct fip_desc *desc = NULL; 2095 struct fip_mac_desc *macd = NULL; 2096 struct fip_wwn_desc *wwn = NULL; 2097 struct fip_vn_desc *vn = NULL; 2098 struct fip_size_desc *size = NULL; 2099 struct fcoe_rport *frport; 2100 size_t rlen; 2101 size_t dlen; 2102 u32 desc_mask = 0; 2103 u32 dtype; 2104 u8 sub; 2105 2106 memset(rdata, 0, sizeof(*rdata) + sizeof(*frport)); 2107 frport = fcoe_ctlr_rport(rdata); 2108 2109 fiph = (struct fip_header *)skb->data; 2110 frport->flags = ntohs(fiph->fip_flags); 2111 2112 sub = fiph->fip_subcode; 2113 switch (sub) { 2114 case FIP_SC_VN_PROBE_REQ: 2115 case FIP_SC_VN_PROBE_REP: 2116 case FIP_SC_VN_BEACON: 2117 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | 2118 BIT(FIP_DT_VN_ID); 2119 break; 2120 case FIP_SC_VN_CLAIM_NOTIFY: 2121 case FIP_SC_VN_CLAIM_REP: 2122 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | 2123 BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) | 2124 BIT(FIP_DT_FCOE_SIZE); 2125 break; 2126 default: 2127 LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub); 2128 return -EINVAL; 2129 } 2130 2131 rlen = ntohs(fiph->fip_dl_len) * 4; 2132 if (rlen + sizeof(*fiph) > skb->len) 2133 return -EINVAL; 2134 2135 desc = (struct fip_desc *)(fiph + 1); 2136 while (rlen > 0) { 2137 dlen = desc->fip_dlen * FIP_BPW; 2138 if (dlen < sizeof(*desc) || dlen > rlen) 2139 return -EINVAL; 2140 2141 dtype = desc->fip_dtype; 2142 if (dtype < 32) { 2143 if (!(desc_mask & BIT(dtype))) { 2144 LIBFCOE_FIP_DBG(fip, 2145 "unexpected or duplicated desc " 2146 "desc type %u in " 2147 "FIP VN2VN subtype %u\n", 2148 dtype, sub); 2149 return -EINVAL; 2150 } 2151 desc_mask &= ~BIT(dtype); 2152 } 2153 2154 switch (dtype) { 2155 case FIP_DT_MAC: 2156 if (dlen != sizeof(struct fip_mac_desc)) 2157 goto len_err; 2158 macd = (struct fip_mac_desc *)desc; 2159 if (!is_valid_ether_addr(macd->fd_mac)) { 2160 LIBFCOE_FIP_DBG(fip, 2161 "Invalid MAC addr %pM in FIP VN2VN\n", 2162 macd->fd_mac); 2163 return -EINVAL; 2164 } 2165 memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN); 2166 break; 2167 case FIP_DT_NAME: 2168 if (dlen != sizeof(struct fip_wwn_desc)) 2169 goto len_err; 2170 wwn = (struct fip_wwn_desc *)desc; 2171 rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn); 2172 break; 2173 case FIP_DT_VN_ID: 2174 if (dlen != sizeof(struct fip_vn_desc)) 2175 goto len_err; 2176 vn = (struct fip_vn_desc *)desc; 2177 memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN); 2178 rdata->ids.port_id = ntoh24(vn->fd_fc_id); 2179 rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn); 2180 break; 2181 case FIP_DT_FC4F: 2182 if (dlen != sizeof(struct fip_fc4_feat)) 2183 goto len_err; 2184 break; 2185 case FIP_DT_FCOE_SIZE: 2186 if (dlen != sizeof(struct fip_size_desc)) 2187 goto len_err; 2188 size = (struct fip_size_desc *)desc; 2189 frport->fcoe_len = ntohs(size->fd_size); 2190 break; 2191 default: 2192 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " 2193 "in FIP probe\n", dtype); 2194 /* standard says ignore unknown descriptors >= 128 */ 2195 if (dtype < FIP_DT_VENDOR_BASE) 2196 return -EINVAL; 2197 break; 2198 } 2199 desc = (struct fip_desc *)((char *)desc + dlen); 2200 rlen -= dlen; 2201 } 2202 return 0; 2203 2204 len_err: 2205 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", 2206 dtype, dlen); 2207 return -EINVAL; 2208 } 2209 2210 /** 2211 * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification. 2212 * @fip: The FCoE controller 2213 * 2214 * Called with ctlr_mutex held. 2215 */ 2216 static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip) 2217 { 2218 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0); 2219 fip->sol_time = jiffies; 2220 } 2221 2222 /** 2223 * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request. 2224 * @fip: The FCoE controller 2225 * @rdata: parsed remote port with frport from the probe request 2226 * 2227 * Called with ctlr_mutex held. 2228 */ 2229 static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip, 2230 struct fc_rport_priv *rdata) 2231 { 2232 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); 2233 2234 if (rdata->ids.port_id != fip->port_id) 2235 return; 2236 2237 switch (fip->state) { 2238 case FIP_ST_VNMP_CLAIM: 2239 case FIP_ST_VNMP_UP: 2240 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, 2241 frport->enode_mac, 0); 2242 break; 2243 case FIP_ST_VNMP_PROBE1: 2244 case FIP_ST_VNMP_PROBE2: 2245 /* 2246 * Decide whether to reply to the Probe. 2247 * Our selected address is never a "recorded" one, so 2248 * only reply if our WWPN is greater and the 2249 * Probe's REC bit is not set. 2250 * If we don't reply, we will change our address. 2251 */ 2252 if (fip->lp->wwpn > rdata->ids.port_name && 2253 !(frport->flags & FIP_FL_REC_OR_P2P)) { 2254 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, 2255 frport->enode_mac, 0); 2256 break; 2257 } 2258 /* fall through */ 2259 case FIP_ST_VNMP_START: 2260 fcoe_ctlr_vn_restart(fip); 2261 break; 2262 default: 2263 break; 2264 } 2265 } 2266 2267 /** 2268 * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply. 2269 * @fip: The FCoE controller 2270 * @rdata: parsed remote port with frport from the probe request 2271 * 2272 * Called with ctlr_mutex held. 2273 */ 2274 static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip, 2275 struct fc_rport_priv *rdata) 2276 { 2277 if (rdata->ids.port_id != fip->port_id) 2278 return; 2279 switch (fip->state) { 2280 case FIP_ST_VNMP_START: 2281 case FIP_ST_VNMP_PROBE1: 2282 case FIP_ST_VNMP_PROBE2: 2283 case FIP_ST_VNMP_CLAIM: 2284 fcoe_ctlr_vn_restart(fip); 2285 break; 2286 case FIP_ST_VNMP_UP: 2287 fcoe_ctlr_vn_send_claim(fip); 2288 break; 2289 default: 2290 break; 2291 } 2292 } 2293 2294 /** 2295 * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply. 2296 * @fip: The FCoE controller 2297 * @new: newly-parsed remote port with frport as a template for new rdata 2298 * 2299 * Called with ctlr_mutex held. 2300 */ 2301 static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new) 2302 { 2303 struct fc_lport *lport = fip->lp; 2304 struct fc_rport_priv *rdata; 2305 struct fc_rport_identifiers *ids; 2306 struct fcoe_rport *frport; 2307 u32 port_id; 2308 2309 port_id = new->ids.port_id; 2310 if (port_id == fip->port_id) 2311 return; 2312 2313 mutex_lock(&lport->disc.disc_mutex); 2314 rdata = lport->tt.rport_create(lport, port_id); 2315 if (!rdata) { 2316 mutex_unlock(&lport->disc.disc_mutex); 2317 return; 2318 } 2319 2320 rdata->ops = &fcoe_ctlr_vn_rport_ops; 2321 rdata->disc_id = lport->disc.disc_id; 2322 2323 ids = &rdata->ids; 2324 if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) || 2325 (ids->node_name != -1 && ids->node_name != new->ids.node_name)) 2326 lport->tt.rport_logoff(rdata); 2327 ids->port_name = new->ids.port_name; 2328 ids->node_name = new->ids.node_name; 2329 mutex_unlock(&lport->disc.disc_mutex); 2330 2331 frport = fcoe_ctlr_rport(rdata); 2332 LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n", 2333 port_id, frport->fcoe_len ? "old" : "new"); 2334 *frport = *fcoe_ctlr_rport(new); 2335 frport->time = 0; 2336 } 2337 2338 /** 2339 * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address 2340 * @fip: The FCoE controller 2341 * @port_id: The port_id of the remote VN_node 2342 * @mac: buffer which will hold the VN_NODE destination MAC address, if found. 2343 * 2344 * Returns non-zero error if no remote port found. 2345 */ 2346 static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac) 2347 { 2348 struct fc_lport *lport = fip->lp; 2349 struct fc_rport_priv *rdata; 2350 struct fcoe_rport *frport; 2351 int ret = -1; 2352 2353 rcu_read_lock(); 2354 rdata = lport->tt.rport_lookup(lport, port_id); 2355 if (rdata) { 2356 frport = fcoe_ctlr_rport(rdata); 2357 memcpy(mac, frport->enode_mac, ETH_ALEN); 2358 ret = 0; 2359 } 2360 rcu_read_unlock(); 2361 return ret; 2362 } 2363 2364 /** 2365 * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification 2366 * @fip: The FCoE controller 2367 * @new: newly-parsed remote port with frport as a template for new rdata 2368 * 2369 * Called with ctlr_mutex held. 2370 */ 2371 static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip, 2372 struct fc_rport_priv *new) 2373 { 2374 struct fcoe_rport *frport = fcoe_ctlr_rport(new); 2375 2376 if (frport->flags & FIP_FL_REC_OR_P2P) { 2377 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); 2378 return; 2379 } 2380 switch (fip->state) { 2381 case FIP_ST_VNMP_START: 2382 case FIP_ST_VNMP_PROBE1: 2383 case FIP_ST_VNMP_PROBE2: 2384 if (new->ids.port_id == fip->port_id) 2385 fcoe_ctlr_vn_restart(fip); 2386 break; 2387 case FIP_ST_VNMP_CLAIM: 2388 case FIP_ST_VNMP_UP: 2389 if (new->ids.port_id == fip->port_id) { 2390 if (new->ids.port_name > fip->lp->wwpn) { 2391 fcoe_ctlr_vn_restart(fip); 2392 break; 2393 } 2394 fcoe_ctlr_vn_send_claim(fip); 2395 break; 2396 } 2397 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac, 2398 min((u32)frport->fcoe_len, 2399 fcoe_ctlr_fcoe_size(fip))); 2400 fcoe_ctlr_vn_add(fip, new); 2401 break; 2402 default: 2403 break; 2404 } 2405 } 2406 2407 /** 2408 * fcoe_ctlr_vn_claim_resp() - handle received Claim Response 2409 * @fip: The FCoE controller that received the frame 2410 * @new: newly-parsed remote port with frport from the Claim Response 2411 * 2412 * Called with ctlr_mutex held. 2413 */ 2414 static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip, 2415 struct fc_rport_priv *new) 2416 { 2417 LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n", 2418 new->ids.port_id, fcoe_ctlr_state(fip->state)); 2419 if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM) 2420 fcoe_ctlr_vn_add(fip, new); 2421 } 2422 2423 /** 2424 * fcoe_ctlr_vn_beacon() - handle received beacon. 2425 * @fip: The FCoE controller that received the frame 2426 * @new: newly-parsed remote port with frport from the Beacon 2427 * 2428 * Called with ctlr_mutex held. 2429 */ 2430 static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip, 2431 struct fc_rport_priv *new) 2432 { 2433 struct fc_lport *lport = fip->lp; 2434 struct fc_rport_priv *rdata; 2435 struct fcoe_rport *frport; 2436 2437 frport = fcoe_ctlr_rport(new); 2438 if (frport->flags & FIP_FL_REC_OR_P2P) { 2439 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); 2440 return; 2441 } 2442 mutex_lock(&lport->disc.disc_mutex); 2443 rdata = lport->tt.rport_lookup(lport, new->ids.port_id); 2444 if (rdata) 2445 kref_get(&rdata->kref); 2446 mutex_unlock(&lport->disc.disc_mutex); 2447 if (rdata) { 2448 if (rdata->ids.node_name == new->ids.node_name && 2449 rdata->ids.port_name == new->ids.port_name) { 2450 frport = fcoe_ctlr_rport(rdata); 2451 if (!frport->time && fip->state == FIP_ST_VNMP_UP) 2452 lport->tt.rport_login(rdata); 2453 frport->time = jiffies; 2454 } 2455 kref_put(&rdata->kref, lport->tt.rport_destroy); 2456 return; 2457 } 2458 if (fip->state != FIP_ST_VNMP_UP) 2459 return; 2460 2461 /* 2462 * Beacon from a new neighbor. 2463 * Send a claim notify if one hasn't been sent recently. 2464 * Don't add the neighbor yet. 2465 */ 2466 LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n", 2467 new->ids.port_id); 2468 if (time_after(jiffies, 2469 fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT))) 2470 fcoe_ctlr_vn_send_claim(fip); 2471 } 2472 2473 /** 2474 * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons 2475 * @fip: The FCoE controller 2476 * 2477 * Called with ctlr_mutex held. 2478 * Called only in state FIP_ST_VNMP_UP. 2479 * Returns the soonest time for next age-out or a time far in the future. 2480 */ 2481 static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip) 2482 { 2483 struct fc_lport *lport = fip->lp; 2484 struct fc_rport_priv *rdata; 2485 struct fcoe_rport *frport; 2486 unsigned long next_time; 2487 unsigned long deadline; 2488 2489 next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10); 2490 mutex_lock(&lport->disc.disc_mutex); 2491 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) { 2492 frport = fcoe_ctlr_rport(rdata); 2493 if (!frport->time) 2494 continue; 2495 deadline = frport->time + 2496 msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10); 2497 if (time_after_eq(jiffies, deadline)) { 2498 frport->time = 0; 2499 LIBFCOE_FIP_DBG(fip, 2500 "port %16.16llx fc_id %6.6x beacon expired\n", 2501 rdata->ids.port_name, rdata->ids.port_id); 2502 lport->tt.rport_logoff(rdata); 2503 } else if (time_before(deadline, next_time)) 2504 next_time = deadline; 2505 } 2506 mutex_unlock(&lport->disc.disc_mutex); 2507 return next_time; 2508 } 2509 2510 /** 2511 * fcoe_ctlr_vn_recv() - Receive a FIP frame 2512 * @fip: The FCoE controller that received the frame 2513 * @skb: The received FIP frame 2514 * 2515 * Returns non-zero if the frame is dropped. 2516 * Always consumes the frame. 2517 */ 2518 static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) 2519 { 2520 struct fip_header *fiph; 2521 enum fip_vn2vn_subcode sub; 2522 struct { 2523 struct fc_rport_priv rdata; 2524 struct fcoe_rport frport; 2525 } buf; 2526 int rc; 2527 2528 fiph = (struct fip_header *)skb->data; 2529 sub = fiph->fip_subcode; 2530 2531 rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata); 2532 if (rc) { 2533 LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc); 2534 goto drop; 2535 } 2536 2537 mutex_lock(&fip->ctlr_mutex); 2538 switch (sub) { 2539 case FIP_SC_VN_PROBE_REQ: 2540 fcoe_ctlr_vn_probe_req(fip, &buf.rdata); 2541 break; 2542 case FIP_SC_VN_PROBE_REP: 2543 fcoe_ctlr_vn_probe_reply(fip, &buf.rdata); 2544 break; 2545 case FIP_SC_VN_CLAIM_NOTIFY: 2546 fcoe_ctlr_vn_claim_notify(fip, &buf.rdata); 2547 break; 2548 case FIP_SC_VN_CLAIM_REP: 2549 fcoe_ctlr_vn_claim_resp(fip, &buf.rdata); 2550 break; 2551 case FIP_SC_VN_BEACON: 2552 fcoe_ctlr_vn_beacon(fip, &buf.rdata); 2553 break; 2554 default: 2555 LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub); 2556 rc = -1; 2557 break; 2558 } 2559 mutex_unlock(&fip->ctlr_mutex); 2560 drop: 2561 kfree_skb(skb); 2562 return rc; 2563 } 2564 2565 /** 2566 * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode. 2567 * @lport: The local port 2568 * @fp: The received frame 2569 * 2570 * This should never be called since we don't see RSCNs or other 2571 * fabric-generated ELSes. 2572 */ 2573 static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp) 2574 { 2575 struct fc_seq_els_data rjt_data; 2576 2577 rjt_data.reason = ELS_RJT_UNSUP; 2578 rjt_data.explan = ELS_EXPL_NONE; 2579 lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); 2580 fc_frame_free(fp); 2581 } 2582 2583 /** 2584 * fcoe_ctlr_disc_recv - start discovery for VN2VN mode. 2585 * @fip: The FCoE controller 2586 * 2587 * This sets a flag indicating that remote ports should be created 2588 * and started for the peers we discover. We use the disc_callback 2589 * pointer as that flag. Peers already discovered are created here. 2590 * 2591 * The lport lock is held during this call. The callback must be done 2592 * later, without holding either the lport or discovery locks. 2593 * The fcoe_ctlr lock may also be held during this call. 2594 */ 2595 static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *, 2596 enum fc_disc_event), 2597 struct fc_lport *lport) 2598 { 2599 struct fc_disc *disc = &lport->disc; 2600 struct fcoe_ctlr *fip = disc->priv; 2601 2602 mutex_lock(&disc->disc_mutex); 2603 disc->disc_callback = callback; 2604 disc->disc_id = (disc->disc_id + 2) | 1; 2605 disc->pending = 1; 2606 schedule_work(&fip->timer_work); 2607 mutex_unlock(&disc->disc_mutex); 2608 } 2609 2610 /** 2611 * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state. 2612 * @fip: The FCoE controller 2613 * 2614 * Starts the FLOGI and PLOGI login process to each discovered rport for which 2615 * we've received at least one beacon. 2616 * Performs the discovery complete callback. 2617 */ 2618 static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip) 2619 { 2620 struct fc_lport *lport = fip->lp; 2621 struct fc_disc *disc = &lport->disc; 2622 struct fc_rport_priv *rdata; 2623 struct fcoe_rport *frport; 2624 void (*callback)(struct fc_lport *, enum fc_disc_event); 2625 2626 mutex_lock(&disc->disc_mutex); 2627 callback = disc->pending ? disc->disc_callback : NULL; 2628 disc->pending = 0; 2629 list_for_each_entry_rcu(rdata, &disc->rports, peers) { 2630 frport = fcoe_ctlr_rport(rdata); 2631 if (frport->time) 2632 lport->tt.rport_login(rdata); 2633 } 2634 mutex_unlock(&disc->disc_mutex); 2635 if (callback) 2636 callback(lport, DISC_EV_SUCCESS); 2637 } 2638 2639 /** 2640 * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode. 2641 * @fip: The FCoE controller 2642 */ 2643 static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip) 2644 { 2645 unsigned long next_time; 2646 u8 mac[ETH_ALEN]; 2647 u32 new_port_id = 0; 2648 2649 mutex_lock(&fip->ctlr_mutex); 2650 switch (fip->state) { 2651 case FIP_ST_VNMP_START: 2652 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1); 2653 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); 2654 next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT); 2655 break; 2656 case FIP_ST_VNMP_PROBE1: 2657 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2); 2658 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); 2659 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); 2660 break; 2661 case FIP_ST_VNMP_PROBE2: 2662 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM); 2663 new_port_id = fip->port_id; 2664 hton24(mac, FIP_VN_FC_MAP); 2665 hton24(mac + 3, new_port_id); 2666 fcoe_ctlr_map_dest(fip); 2667 fip->update_mac(fip->lp, mac); 2668 fcoe_ctlr_vn_send_claim(fip); 2669 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); 2670 break; 2671 case FIP_ST_VNMP_CLAIM: 2672 /* 2673 * This may be invoked either by starting discovery so don't 2674 * go to the next state unless it's been long enough. 2675 */ 2676 next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT); 2677 if (time_after_eq(jiffies, next_time)) { 2678 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP); 2679 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, 2680 fcoe_all_vn2vn, 0); 2681 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); 2682 fip->port_ka_time = next_time; 2683 } 2684 fcoe_ctlr_vn_disc(fip); 2685 break; 2686 case FIP_ST_VNMP_UP: 2687 next_time = fcoe_ctlr_vn_age(fip); 2688 if (time_after_eq(jiffies, fip->port_ka_time)) { 2689 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, 2690 fcoe_all_vn2vn, 0); 2691 fip->port_ka_time = jiffies + 2692 msecs_to_jiffies(FIP_VN_BEACON_INT + 2693 (random32() % FIP_VN_BEACON_FUZZ)); 2694 } 2695 if (time_before(fip->port_ka_time, next_time)) 2696 next_time = fip->port_ka_time; 2697 break; 2698 case FIP_ST_LINK_WAIT: 2699 goto unlock; 2700 default: 2701 WARN(1, "unexpected state %d\n", fip->state); 2702 goto unlock; 2703 } 2704 mod_timer(&fip->timer, next_time); 2705 unlock: 2706 mutex_unlock(&fip->ctlr_mutex); 2707 2708 /* If port ID is new, notify local port after dropping ctlr_mutex */ 2709 if (new_port_id) 2710 fc_lport_set_local_id(fip->lp, new_port_id); 2711 } 2712 2713 /** 2714 * fcoe_libfc_config() - Sets up libfc related properties for local port 2715 * @lp: The local port to configure libfc for 2716 * @fip: The FCoE controller in use by the local port 2717 * @tt: The libfc function template 2718 * @init_fcp: If non-zero, the FCP portion of libfc should be initialized 2719 * 2720 * Returns : 0 for success 2721 */ 2722 int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, 2723 const struct libfc_function_template *tt, int init_fcp) 2724 { 2725 /* Set the function pointers set by the LLDD */ 2726 memcpy(&lport->tt, tt, sizeof(*tt)); 2727 if (init_fcp && fc_fcp_init(lport)) 2728 return -ENOMEM; 2729 fc_exch_init(lport); 2730 fc_elsct_init(lport); 2731 fc_lport_init(lport); 2732 if (fip->mode == FIP_MODE_VN2VN) 2733 lport->rport_priv_size = sizeof(struct fcoe_rport); 2734 fc_rport_init(lport); 2735 if (fip->mode == FIP_MODE_VN2VN) { 2736 lport->point_to_multipoint = 1; 2737 lport->tt.disc_recv_req = fcoe_ctlr_disc_recv; 2738 lport->tt.disc_start = fcoe_ctlr_disc_start; 2739 lport->tt.disc_stop = fcoe_ctlr_disc_stop; 2740 lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final; 2741 mutex_init(&lport->disc.disc_mutex); 2742 INIT_LIST_HEAD(&lport->disc.rports); 2743 lport->disc.priv = fip; 2744 } else { 2745 fc_disc_init(lport); 2746 } 2747 return 0; 2748 } 2749 EXPORT_SYMBOL_GPL(fcoe_libfc_config); 2750