1 /* 2 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, write to the Free Software Foundation, Inc., 15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 16 * 17 * Maintained at www.Open-FCoE.org 18 */ 19 20 #include <linux/module.h> 21 #include <linux/spinlock.h> 22 #include <linux/netdevice.h> 23 #include <linux/etherdevice.h> 24 #include <linux/ethtool.h> 25 #include <linux/if_ether.h> 26 #include <linux/if_vlan.h> 27 #include <linux/crc32.h> 28 #include <linux/slab.h> 29 #include <linux/cpu.h> 30 #include <linux/fs.h> 31 #include <linux/sysfs.h> 32 #include <linux/ctype.h> 33 #include <linux/workqueue.h> 34 #include <net/dcbnl.h> 35 #include <net/dcbevent.h> 36 #include <scsi/scsi_tcq.h> 37 #include <scsi/scsicam.h> 38 #include <scsi/scsi_transport.h> 39 #include <scsi/scsi_transport_fc.h> 40 #include <net/rtnetlink.h> 41 42 #include <scsi/fc/fc_encaps.h> 43 #include <scsi/fc/fc_fip.h> 44 #include <scsi/fc/fc_fcoe.h> 45 46 #include <scsi/libfc.h> 47 #include <scsi/fc_frame.h> 48 #include <scsi/libfcoe.h> 49 50 #include "fcoe.h" 51 52 MODULE_AUTHOR("Open-FCoE.org"); 53 MODULE_DESCRIPTION("FCoE"); 54 MODULE_LICENSE("GPL v2"); 55 56 /* Performance tuning parameters for fcoe */ 57 static unsigned int fcoe_ddp_min = 4096; 58 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); 59 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ 60 "Direct Data Placement (DDP)."); 61 62 unsigned int fcoe_debug_logging; 63 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR); 64 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); 65 66 static DEFINE_MUTEX(fcoe_config_mutex); 67 68 static struct workqueue_struct *fcoe_wq; 69 70 /* fcoe host list */ 71 /* must only by accessed under the RTNL mutex */ 72 static LIST_HEAD(fcoe_hostlist); 73 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); 74 75 /* Function Prototypes */ 76 static int fcoe_reset(struct Scsi_Host *); 77 static int fcoe_xmit(struct fc_lport *, struct fc_frame *); 78 static int fcoe_rcv(struct sk_buff *, struct net_device *, 79 struct packet_type *, struct net_device *); 80 static void fcoe_percpu_clean(struct fc_lport *); 81 static int fcoe_link_ok(struct fc_lport *); 82 83 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); 84 static int fcoe_hostlist_add(const struct fc_lport *); 85 static void fcoe_hostlist_del(const struct fc_lport *); 86 87 static int fcoe_device_notification(struct notifier_block *, ulong, void *); 88 static void fcoe_dev_setup(void); 89 static void fcoe_dev_cleanup(void); 90 static struct fcoe_interface 91 *fcoe_hostlist_lookup_port(const struct net_device *); 92 93 static int fcoe_fip_recv(struct sk_buff *, struct net_device *, 94 struct packet_type *, struct net_device *); 95 static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *, 96 struct packet_type *, struct net_device *); 97 98 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); 99 static void fcoe_update_src_mac(struct fc_lport *, u8 *); 100 static u8 *fcoe_get_src_mac(struct fc_lport *); 101 static void fcoe_destroy_work(struct work_struct *); 102 103 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, 104 unsigned int); 105 static int fcoe_ddp_done(struct fc_lport *, u16); 106 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *, 107 unsigned int); 108 static int fcoe_dcb_app_notification(struct notifier_block *notifier, 109 ulong event, void *ptr); 110 111 static bool fcoe_match(struct net_device *netdev); 112 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode); 113 static int fcoe_destroy(struct net_device *netdev); 114 static int fcoe_enable(struct net_device *netdev); 115 static int fcoe_disable(struct net_device *netdev); 116 117 /* fcoe_syfs control interface handlers */ 118 static int fcoe_ctlr_alloc(struct net_device *netdev); 119 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev); 120 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev); 121 122 static struct fc_seq *fcoe_elsct_send(struct fc_lport *, 123 u32 did, struct fc_frame *, 124 unsigned int op, 125 void (*resp)(struct fc_seq *, 126 struct fc_frame *, 127 void *), 128 void *, u32 timeout); 129 static void fcoe_recv_frame(struct sk_buff *skb); 130 131 /* notification function for packets from net device */ 132 static struct notifier_block fcoe_notifier = { 133 .notifier_call = fcoe_device_notification, 134 }; 135 136 /* notification function for DCB events */ 137 static struct notifier_block dcb_notifier = { 138 .notifier_call = fcoe_dcb_app_notification, 139 }; 140 141 static struct scsi_transport_template *fcoe_nport_scsi_transport; 142 static struct scsi_transport_template *fcoe_vport_scsi_transport; 143 144 static int fcoe_vport_destroy(struct fc_vport *); 145 static int fcoe_vport_create(struct fc_vport *, bool disabled); 146 static int fcoe_vport_disable(struct fc_vport *, bool disable); 147 static void fcoe_set_vport_symbolic_name(struct fc_vport *); 148 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); 149 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *); 150 151 152 static struct fcoe_sysfs_function_template fcoe_sysfs_templ = { 153 .set_fcoe_ctlr_mode = fcoe_ctlr_mode, 154 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled, 155 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb, 156 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb, 157 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb, 158 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb, 159 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb, 160 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb, 161 162 .get_fcoe_fcf_selected = fcoe_fcf_get_selected, 163 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id, 164 }; 165 166 static struct libfc_function_template fcoe_libfc_fcn_templ = { 167 .frame_send = fcoe_xmit, 168 .ddp_setup = fcoe_ddp_setup, 169 .ddp_done = fcoe_ddp_done, 170 .ddp_target = fcoe_ddp_target, 171 .elsct_send = fcoe_elsct_send, 172 .get_lesb = fcoe_get_lesb, 173 .lport_set_port_id = fcoe_set_port_id, 174 }; 175 176 static struct fc_function_template fcoe_nport_fc_functions = { 177 .show_host_node_name = 1, 178 .show_host_port_name = 1, 179 .show_host_supported_classes = 1, 180 .show_host_supported_fc4s = 1, 181 .show_host_active_fc4s = 1, 182 .show_host_maxframe_size = 1, 183 .show_host_serial_number = 1, 184 .show_host_manufacturer = 1, 185 .show_host_model = 1, 186 .show_host_model_description = 1, 187 .show_host_hardware_version = 1, 188 .show_host_driver_version = 1, 189 .show_host_firmware_version = 1, 190 .show_host_optionrom_version = 1, 191 192 .show_host_port_id = 1, 193 .show_host_supported_speeds = 1, 194 .get_host_speed = fc_get_host_speed, 195 .show_host_speed = 1, 196 .show_host_port_type = 1, 197 .get_host_port_state = fc_get_host_port_state, 198 .show_host_port_state = 1, 199 .show_host_symbolic_name = 1, 200 201 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 202 .show_rport_maxframe_size = 1, 203 .show_rport_supported_classes = 1, 204 205 .show_host_fabric_name = 1, 206 .show_starget_node_name = 1, 207 .show_starget_port_name = 1, 208 .show_starget_port_id = 1, 209 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 210 .show_rport_dev_loss_tmo = 1, 211 .get_fc_host_stats = fc_get_host_stats, 212 .issue_fc_host_lip = fcoe_reset, 213 214 .terminate_rport_io = fc_rport_terminate_io, 215 216 .vport_create = fcoe_vport_create, 217 .vport_delete = fcoe_vport_destroy, 218 .vport_disable = fcoe_vport_disable, 219 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, 220 221 .bsg_request = fc_lport_bsg_request, 222 }; 223 224 static struct fc_function_template fcoe_vport_fc_functions = { 225 .show_host_node_name = 1, 226 .show_host_port_name = 1, 227 .show_host_supported_classes = 1, 228 .show_host_supported_fc4s = 1, 229 .show_host_active_fc4s = 1, 230 .show_host_maxframe_size = 1, 231 .show_host_serial_number = 1, 232 .show_host_manufacturer = 1, 233 .show_host_model = 1, 234 .show_host_model_description = 1, 235 .show_host_hardware_version = 1, 236 .show_host_driver_version = 1, 237 .show_host_firmware_version = 1, 238 .show_host_optionrom_version = 1, 239 240 .show_host_port_id = 1, 241 .show_host_supported_speeds = 1, 242 .get_host_speed = fc_get_host_speed, 243 .show_host_speed = 1, 244 .show_host_port_type = 1, 245 .get_host_port_state = fc_get_host_port_state, 246 .show_host_port_state = 1, 247 .show_host_symbolic_name = 1, 248 249 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 250 .show_rport_maxframe_size = 1, 251 .show_rport_supported_classes = 1, 252 253 .show_host_fabric_name = 1, 254 .show_starget_node_name = 1, 255 .show_starget_port_name = 1, 256 .show_starget_port_id = 1, 257 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 258 .show_rport_dev_loss_tmo = 1, 259 .get_fc_host_stats = fc_get_host_stats, 260 .issue_fc_host_lip = fcoe_reset, 261 262 .terminate_rport_io = fc_rport_terminate_io, 263 264 .bsg_request = fc_lport_bsg_request, 265 }; 266 267 static struct scsi_host_template fcoe_shost_template = { 268 .module = THIS_MODULE, 269 .name = "FCoE Driver", 270 .proc_name = FCOE_NAME, 271 .queuecommand = fc_queuecommand, 272 .eh_abort_handler = fc_eh_abort, 273 .eh_device_reset_handler = fc_eh_device_reset, 274 .eh_host_reset_handler = fc_eh_host_reset, 275 .slave_alloc = fc_slave_alloc, 276 .change_queue_depth = scsi_change_queue_depth, 277 .this_id = -1, 278 .cmd_per_lun = 3, 279 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, 280 .use_clustering = ENABLE_CLUSTERING, 281 .sg_tablesize = SG_ALL, 282 .max_sectors = 0xffff, 283 .track_queue_depth = 1, 284 }; 285 286 /** 287 * fcoe_interface_setup() - Setup a FCoE interface 288 * @fcoe: The new FCoE interface 289 * @netdev: The net device that the fcoe interface is on 290 * 291 * Returns : 0 for success 292 * Locking: must be called with the RTNL mutex held 293 */ 294 static int fcoe_interface_setup(struct fcoe_interface *fcoe, 295 struct net_device *netdev) 296 { 297 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 298 struct netdev_hw_addr *ha; 299 struct net_device *real_dev; 300 u8 flogi_maddr[ETH_ALEN]; 301 const struct net_device_ops *ops; 302 303 fcoe->netdev = netdev; 304 305 /* Let LLD initialize for FCoE */ 306 ops = netdev->netdev_ops; 307 if (ops->ndo_fcoe_enable) { 308 if (ops->ndo_fcoe_enable(netdev)) 309 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" 310 " specific feature for LLD.\n"); 311 } 312 313 /* Do not support for bonding device */ 314 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) { 315 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); 316 return -EOPNOTSUPP; 317 } 318 319 /* look for SAN MAC address, if multiple SAN MACs exist, only 320 * use the first one for SPMA */ 321 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? 322 vlan_dev_real_dev(netdev) : netdev; 323 fcoe->realdev = real_dev; 324 rcu_read_lock(); 325 for_each_dev_addr(real_dev, ha) { 326 if ((ha->type == NETDEV_HW_ADDR_T_SAN) && 327 (is_valid_ether_addr(ha->addr))) { 328 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); 329 fip->spma = 1; 330 break; 331 } 332 } 333 rcu_read_unlock(); 334 335 /* setup Source Mac Address */ 336 if (!fip->spma) 337 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); 338 339 /* 340 * Add FCoE MAC address as second unicast MAC address 341 * or enter promiscuous mode if not capable of listening 342 * for multiple unicast MACs. 343 */ 344 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 345 dev_uc_add(netdev, flogi_maddr); 346 if (fip->spma) 347 dev_uc_add(netdev, fip->ctl_src_addr); 348 if (fip->mode == FIP_MODE_VN2VN) { 349 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); 350 dev_mc_add(netdev, FIP_ALL_P2P_MACS); 351 } else 352 dev_mc_add(netdev, FIP_ALL_ENODE_MACS); 353 354 /* 355 * setup the receive function from ethernet driver 356 * on the ethertype for the given device 357 */ 358 fcoe->fcoe_packet_type.func = fcoe_rcv; 359 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE); 360 fcoe->fcoe_packet_type.dev = netdev; 361 dev_add_pack(&fcoe->fcoe_packet_type); 362 363 fcoe->fip_packet_type.func = fcoe_fip_recv; 364 fcoe->fip_packet_type.type = htons(ETH_P_FIP); 365 fcoe->fip_packet_type.dev = netdev; 366 dev_add_pack(&fcoe->fip_packet_type); 367 368 if (netdev != real_dev) { 369 fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv; 370 fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP); 371 fcoe->fip_vlan_packet_type.dev = real_dev; 372 dev_add_pack(&fcoe->fip_vlan_packet_type); 373 } 374 return 0; 375 } 376 377 /** 378 * fcoe_interface_create() - Create a FCoE interface on a net device 379 * @netdev: The net device to create the FCoE interface on 380 * @fip_mode: The mode to use for FIP 381 * 382 * Returns: pointer to a struct fcoe_interface or NULL on error 383 */ 384 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, 385 enum fip_state fip_mode) 386 { 387 struct fcoe_ctlr_device *ctlr_dev; 388 struct fcoe_ctlr *ctlr; 389 struct fcoe_interface *fcoe; 390 int size; 391 int err; 392 393 if (!try_module_get(THIS_MODULE)) { 394 FCOE_NETDEV_DBG(netdev, 395 "Could not get a reference to the module\n"); 396 fcoe = ERR_PTR(-EBUSY); 397 goto out; 398 } 399 400 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface); 401 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ, 402 size); 403 if (!ctlr_dev) { 404 FCOE_DBG("Failed to add fcoe_ctlr_device\n"); 405 fcoe = ERR_PTR(-ENOMEM); 406 goto out_putmod; 407 } 408 409 ctlr = fcoe_ctlr_device_priv(ctlr_dev); 410 ctlr->cdev = ctlr_dev; 411 fcoe = fcoe_ctlr_priv(ctlr); 412 413 dev_hold(netdev); 414 415 /* 416 * Initialize FIP. 417 */ 418 fcoe_ctlr_init(ctlr, fip_mode); 419 ctlr->send = fcoe_fip_send; 420 ctlr->update_mac = fcoe_update_src_mac; 421 ctlr->get_src_addr = fcoe_get_src_mac; 422 423 err = fcoe_interface_setup(fcoe, netdev); 424 if (err) { 425 fcoe_ctlr_destroy(ctlr); 426 fcoe_ctlr_device_delete(ctlr_dev); 427 dev_put(netdev); 428 fcoe = ERR_PTR(err); 429 goto out_putmod; 430 } 431 432 goto out; 433 434 out_putmod: 435 module_put(THIS_MODULE); 436 out: 437 return fcoe; 438 } 439 440 /** 441 * fcoe_interface_remove() - remove FCoE interface from netdev 442 * @fcoe: The FCoE interface to be cleaned up 443 * 444 * Caller must be holding the RTNL mutex 445 */ 446 static void fcoe_interface_remove(struct fcoe_interface *fcoe) 447 { 448 struct net_device *netdev = fcoe->netdev; 449 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 450 u8 flogi_maddr[ETH_ALEN]; 451 const struct net_device_ops *ops; 452 453 /* 454 * Don't listen for Ethernet packets anymore. 455 * synchronize_net() ensures that the packet handlers are not running 456 * on another CPU. dev_remove_pack() would do that, this calls the 457 * unsyncronized version __dev_remove_pack() to avoid multiple delays. 458 */ 459 __dev_remove_pack(&fcoe->fcoe_packet_type); 460 __dev_remove_pack(&fcoe->fip_packet_type); 461 if (netdev != fcoe->realdev) 462 __dev_remove_pack(&fcoe->fip_vlan_packet_type); 463 synchronize_net(); 464 465 /* Delete secondary MAC addresses */ 466 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 467 dev_uc_del(netdev, flogi_maddr); 468 if (fip->spma) 469 dev_uc_del(netdev, fip->ctl_src_addr); 470 if (fip->mode == FIP_MODE_VN2VN) { 471 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); 472 dev_mc_del(netdev, FIP_ALL_P2P_MACS); 473 } else 474 dev_mc_del(netdev, FIP_ALL_ENODE_MACS); 475 476 /* Tell the LLD we are done w/ FCoE */ 477 ops = netdev->netdev_ops; 478 if (ops->ndo_fcoe_disable) { 479 if (ops->ndo_fcoe_disable(netdev)) 480 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" 481 " specific feature for LLD.\n"); 482 } 483 fcoe->removed = 1; 484 } 485 486 487 /** 488 * fcoe_interface_cleanup() - Clean up a FCoE interface 489 * @fcoe: The FCoE interface to be cleaned up 490 */ 491 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) 492 { 493 struct net_device *netdev = fcoe->netdev; 494 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 495 496 rtnl_lock(); 497 if (!fcoe->removed) 498 fcoe_interface_remove(fcoe); 499 rtnl_unlock(); 500 501 /* Release the self-reference taken during fcoe_interface_create() */ 502 /* tear-down the FCoE controller */ 503 fcoe_ctlr_destroy(fip); 504 scsi_host_put(fip->lp->host); 505 dev_put(netdev); 506 module_put(THIS_MODULE); 507 } 508 509 /** 510 * fcoe_fip_recv() - Handler for received FIP frames 511 * @skb: The receive skb 512 * @netdev: The associated net device 513 * @ptype: The packet_type structure which was used to register this handler 514 * @orig_dev: The original net_device the the skb was received on. 515 * (in case dev is a bond) 516 * 517 * Returns: 0 for success 518 */ 519 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, 520 struct packet_type *ptype, 521 struct net_device *orig_dev) 522 { 523 struct fcoe_interface *fcoe; 524 struct fcoe_ctlr *ctlr; 525 526 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); 527 ctlr = fcoe_to_ctlr(fcoe); 528 fcoe_ctlr_recv(ctlr, skb); 529 return 0; 530 } 531 532 /** 533 * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames 534 * @skb: The receive skb 535 * @netdev: The associated net device 536 * @ptype: The packet_type structure which was used to register this handler 537 * @orig_dev: The original net_device the the skb was received on. 538 * (in case dev is a bond) 539 * 540 * Returns: 0 for success 541 */ 542 static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev, 543 struct packet_type *ptype, 544 struct net_device *orig_dev) 545 { 546 struct fcoe_interface *fcoe; 547 struct fcoe_ctlr *ctlr; 548 549 fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type); 550 ctlr = fcoe_to_ctlr(fcoe); 551 fcoe_ctlr_recv(ctlr, skb); 552 return 0; 553 } 554 555 /** 556 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame 557 * @port: The FCoE port 558 * @skb: The FIP/FCoE packet to be sent 559 */ 560 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb) 561 { 562 if (port->fcoe_pending_queue.qlen) 563 fcoe_check_wait_queue(port->lport, skb); 564 else if (fcoe_start_io(skb)) 565 fcoe_check_wait_queue(port->lport, skb); 566 } 567 568 /** 569 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame 570 * @fip: The FCoE controller 571 * @skb: The FIP packet to be sent 572 */ 573 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 574 { 575 struct fcoe_interface *fcoe = fcoe_from_ctlr(fip); 576 struct fip_frame { 577 struct ethhdr eth; 578 struct fip_header fip; 579 } __packed *frame; 580 581 /* 582 * Use default VLAN for FIP VLAN discovery protocol 583 */ 584 frame = (struct fip_frame *)skb->data; 585 if (frame->fip.fip_op == ntohs(FIP_OP_VLAN) && 586 fcoe->realdev != fcoe->netdev) 587 skb->dev = fcoe->realdev; 588 else 589 skb->dev = fcoe->netdev; 590 fcoe_port_send(lport_priv(fip->lp), skb); 591 } 592 593 /** 594 * fcoe_update_src_mac() - Update the Ethernet MAC filters 595 * @lport: The local port to update the source MAC on 596 * @addr: Unicast MAC address to add 597 * 598 * Remove any previously-set unicast MAC filter. 599 * Add secondary FCoE MAC address filter for our OUI. 600 */ 601 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) 602 { 603 struct fcoe_port *port = lport_priv(lport); 604 struct fcoe_interface *fcoe = port->priv; 605 606 if (!is_zero_ether_addr(port->data_src_addr)) 607 dev_uc_del(fcoe->netdev, port->data_src_addr); 608 if (!is_zero_ether_addr(addr)) 609 dev_uc_add(fcoe->netdev, addr); 610 memcpy(port->data_src_addr, addr, ETH_ALEN); 611 } 612 613 /** 614 * fcoe_get_src_mac() - return the Ethernet source address for an lport 615 * @lport: libfc lport 616 */ 617 static u8 *fcoe_get_src_mac(struct fc_lport *lport) 618 { 619 struct fcoe_port *port = lport_priv(lport); 620 621 return port->data_src_addr; 622 } 623 624 /** 625 * fcoe_lport_config() - Set up a local port 626 * @lport: The local port to be setup 627 * 628 * Returns: 0 for success 629 */ 630 static int fcoe_lport_config(struct fc_lport *lport) 631 { 632 lport->link_up = 0; 633 lport->qfull = 0; 634 lport->max_retry_count = 3; 635 lport->max_rport_retry_count = 3; 636 lport->e_d_tov = 2 * 1000; /* FC-FS default */ 637 lport->r_a_tov = 2 * 2 * 1000; 638 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 639 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); 640 lport->does_npiv = 1; 641 642 fc_lport_init_stats(lport); 643 644 /* lport fc_lport related configuration */ 645 fc_lport_config(lport); 646 647 /* offload related configuration */ 648 lport->crc_offload = 0; 649 lport->seq_offload = 0; 650 lport->lro_enabled = 0; 651 lport->lro_xid = 0; 652 lport->lso_max = 0; 653 654 return 0; 655 } 656 657 /** 658 * fcoe_netdev_features_change - Updates the lport's offload flags based 659 * on the LLD netdev's FCoE feature flags 660 */ 661 static void fcoe_netdev_features_change(struct fc_lport *lport, 662 struct net_device *netdev) 663 { 664 mutex_lock(&lport->lp_mutex); 665 666 if (netdev->features & NETIF_F_SG) 667 lport->sg_supp = 1; 668 else 669 lport->sg_supp = 0; 670 671 if (netdev->features & NETIF_F_FCOE_CRC) { 672 lport->crc_offload = 1; 673 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); 674 } else { 675 lport->crc_offload = 0; 676 } 677 678 if (netdev->features & NETIF_F_FSO) { 679 lport->seq_offload = 1; 680 lport->lso_max = netdev->gso_max_size; 681 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", 682 lport->lso_max); 683 } else { 684 lport->seq_offload = 0; 685 lport->lso_max = 0; 686 } 687 688 if (netdev->fcoe_ddp_xid) { 689 lport->lro_enabled = 1; 690 lport->lro_xid = netdev->fcoe_ddp_xid; 691 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", 692 lport->lro_xid); 693 } else { 694 lport->lro_enabled = 0; 695 lport->lro_xid = 0; 696 } 697 698 mutex_unlock(&lport->lp_mutex); 699 } 700 701 /** 702 * fcoe_netdev_config() - Set up net devive for SW FCoE 703 * @lport: The local port that is associated with the net device 704 * @netdev: The associated net device 705 * 706 * Must be called after fcoe_lport_config() as it will use local port mutex 707 * 708 * Returns: 0 for success 709 */ 710 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) 711 { 712 u32 mfs; 713 u64 wwnn, wwpn; 714 struct fcoe_interface *fcoe; 715 struct fcoe_ctlr *ctlr; 716 struct fcoe_port *port; 717 718 /* Setup lport private data to point to fcoe softc */ 719 port = lport_priv(lport); 720 fcoe = port->priv; 721 ctlr = fcoe_to_ctlr(fcoe); 722 723 /* Figure out the VLAN ID, if any */ 724 if (netdev->priv_flags & IFF_802_1Q_VLAN) 725 lport->vlan = vlan_dev_vlan_id(netdev); 726 else 727 lport->vlan = 0; 728 729 /* 730 * Determine max frame size based on underlying device and optional 731 * user-configured limit. If the MFS is too low, fcoe_link_ok() 732 * will return 0, so do this first. 733 */ 734 mfs = netdev->mtu; 735 if (netdev->features & NETIF_F_FCOE_MTU) { 736 mfs = FCOE_MTU; 737 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); 738 } 739 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); 740 if (fc_set_mfs(lport, mfs)) 741 return -EINVAL; 742 743 /* offload features support */ 744 fcoe_netdev_features_change(lport, netdev); 745 746 skb_queue_head_init(&port->fcoe_pending_queue); 747 port->fcoe_pending_queue_active = 0; 748 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); 749 750 fcoe_link_speed_update(lport); 751 752 if (!lport->vport) { 753 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) 754 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0); 755 fc_set_wwnn(lport, wwnn); 756 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) 757 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 758 2, 0); 759 fc_set_wwpn(lport, wwpn); 760 } 761 762 return 0; 763 } 764 765 /** 766 * fcoe_shost_config() - Set up the SCSI host associated with a local port 767 * @lport: The local port 768 * @dev: The device associated with the SCSI host 769 * 770 * Must be called after fcoe_lport_config() and fcoe_netdev_config() 771 * 772 * Returns: 0 for success 773 */ 774 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) 775 { 776 int rc = 0; 777 778 /* lport scsi host config */ 779 lport->host->max_lun = FCOE_MAX_LUN; 780 lport->host->max_id = FCOE_MAX_FCP_TARGET; 781 lport->host->max_channel = 0; 782 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; 783 784 if (lport->vport) 785 lport->host->transportt = fcoe_vport_scsi_transport; 786 else 787 lport->host->transportt = fcoe_nport_scsi_transport; 788 789 /* add the new host to the SCSI-ml */ 790 rc = scsi_add_host(lport->host, dev); 791 if (rc) { 792 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " 793 "error on scsi_add_host\n"); 794 return rc; 795 } 796 797 if (!lport->vport) 798 fc_host_max_npiv_vports(lport->host) = USHRT_MAX; 799 800 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 801 "%s v%s over %s", FCOE_NAME, FCOE_VERSION, 802 fcoe_netdev(lport)->name); 803 804 return 0; 805 } 806 807 808 /** 809 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE 810 * @lport: The local port that is associated with the net device 811 * @netdev: The associated net device 812 * 813 * Must be called after fcoe_shost_config() as it will use local port mutex 814 * 815 */ 816 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev) 817 { 818 struct fcoe_interface *fcoe; 819 struct fcoe_port *port; 820 struct net_device *realdev; 821 int rc; 822 823 port = lport_priv(lport); 824 fcoe = port->priv; 825 realdev = fcoe->realdev; 826 827 /* No FDMI state m/c for NPIV ports */ 828 if (lport->vport) 829 return; 830 831 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) { 832 struct netdev_fcoe_hbainfo *fdmi; 833 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL); 834 if (!fdmi) 835 return; 836 837 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev, 838 fdmi); 839 if (rc) { 840 printk(KERN_INFO "fcoe: Failed to retrieve FDMI " 841 "information from netdev.\n"); 842 return; 843 } 844 845 snprintf(fc_host_serial_number(lport->host), 846 FC_SERIAL_NUMBER_SIZE, 847 "%s", 848 fdmi->serial_number); 849 snprintf(fc_host_manufacturer(lport->host), 850 FC_SERIAL_NUMBER_SIZE, 851 "%s", 852 fdmi->manufacturer); 853 snprintf(fc_host_model(lport->host), 854 FC_SYMBOLIC_NAME_SIZE, 855 "%s", 856 fdmi->model); 857 snprintf(fc_host_model_description(lport->host), 858 FC_SYMBOLIC_NAME_SIZE, 859 "%s", 860 fdmi->model_description); 861 snprintf(fc_host_hardware_version(lport->host), 862 FC_VERSION_STRING_SIZE, 863 "%s", 864 fdmi->hardware_version); 865 snprintf(fc_host_driver_version(lport->host), 866 FC_VERSION_STRING_SIZE, 867 "%s", 868 fdmi->driver_version); 869 snprintf(fc_host_optionrom_version(lport->host), 870 FC_VERSION_STRING_SIZE, 871 "%s", 872 fdmi->optionrom_version); 873 snprintf(fc_host_firmware_version(lport->host), 874 FC_VERSION_STRING_SIZE, 875 "%s", 876 fdmi->firmware_version); 877 878 /* Enable FDMI lport states */ 879 lport->fdmi_enabled = 1; 880 kfree(fdmi); 881 } else { 882 lport->fdmi_enabled = 0; 883 printk(KERN_INFO "fcoe: No FDMI support.\n"); 884 } 885 } 886 887 /** 888 * fcoe_oem_match() - The match routine for the offloaded exchange manager 889 * @fp: The I/O frame 890 * 891 * This routine will be associated with an exchange manager (EM). When 892 * the libfc exchange handling code is looking for an EM to use it will 893 * call this routine and pass it the frame that it wishes to send. This 894 * routine will return True if the associated EM is to be used and False 895 * if the echange code should continue looking for an EM. 896 * 897 * The offload EM that this routine is associated with will handle any 898 * packets that are for SCSI read requests. 899 * 900 * This has been enhanced to work when FCoE stack is operating in target 901 * mode. 902 * 903 * Returns: True for read types I/O, otherwise returns false. 904 */ 905 static bool fcoe_oem_match(struct fc_frame *fp) 906 { 907 struct fc_frame_header *fh = fc_frame_header_get(fp); 908 struct fcp_cmnd *fcp; 909 910 if (fc_fcp_is_read(fr_fsp(fp)) && 911 (fr_fsp(fp)->data_len > fcoe_ddp_min)) 912 return true; 913 else if ((fr_fsp(fp) == NULL) && 914 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) && 915 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) { 916 fcp = fc_frame_payload_get(fp, sizeof(*fcp)); 917 if ((fcp->fc_flags & FCP_CFL_WRDATA) && 918 (ntohl(fcp->fc_dl) > fcoe_ddp_min)) 919 return true; 920 } 921 return false; 922 } 923 924 /** 925 * fcoe_em_config() - Allocate and configure an exchange manager 926 * @lport: The local port that the new EM will be associated with 927 * 928 * Returns: 0 on success 929 */ 930 static inline int fcoe_em_config(struct fc_lport *lport) 931 { 932 struct fcoe_port *port = lport_priv(lport); 933 struct fcoe_interface *fcoe = port->priv; 934 struct fcoe_interface *oldfcoe = NULL; 935 struct net_device *old_real_dev, *cur_real_dev; 936 u16 min_xid = FCOE_MIN_XID; 937 u16 max_xid = FCOE_MAX_XID; 938 939 /* 940 * Check if need to allocate an em instance for 941 * offload exchange ids to be shared across all VN_PORTs/lport. 942 */ 943 if (!lport->lro_enabled || !lport->lro_xid || 944 (lport->lro_xid >= max_xid)) { 945 lport->lro_xid = 0; 946 goto skip_oem; 947 } 948 949 /* 950 * Reuse existing offload em instance in case 951 * it is already allocated on real eth device 952 */ 953 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 954 cur_real_dev = vlan_dev_real_dev(fcoe->netdev); 955 else 956 cur_real_dev = fcoe->netdev; 957 958 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { 959 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 960 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); 961 else 962 old_real_dev = oldfcoe->netdev; 963 964 if (cur_real_dev == old_real_dev) { 965 fcoe->oem = oldfcoe->oem; 966 break; 967 } 968 } 969 970 if (fcoe->oem) { 971 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { 972 printk(KERN_ERR "fcoe_em_config: failed to add " 973 "offload em:%p on interface:%s\n", 974 fcoe->oem, fcoe->netdev->name); 975 return -ENOMEM; 976 } 977 } else { 978 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, 979 FCOE_MIN_XID, lport->lro_xid, 980 fcoe_oem_match); 981 if (!fcoe->oem) { 982 printk(KERN_ERR "fcoe_em_config: failed to allocate " 983 "em for offload exches on interface:%s\n", 984 fcoe->netdev->name); 985 return -ENOMEM; 986 } 987 } 988 989 /* 990 * Exclude offload EM xid range from next EM xid range. 991 */ 992 min_xid += lport->lro_xid + 1; 993 994 skip_oem: 995 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { 996 printk(KERN_ERR "fcoe_em_config: failed to " 997 "allocate em on interface %s\n", fcoe->netdev->name); 998 return -ENOMEM; 999 } 1000 1001 return 0; 1002 } 1003 1004 /** 1005 * fcoe_if_destroy() - Tear down a SW FCoE instance 1006 * @lport: The local port to be destroyed 1007 * 1008 */ 1009 static void fcoe_if_destroy(struct fc_lport *lport) 1010 { 1011 struct fcoe_port *port = lport_priv(lport); 1012 struct fcoe_interface *fcoe = port->priv; 1013 struct net_device *netdev = fcoe->netdev; 1014 1015 FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); 1016 1017 /* Logout of the fabric */ 1018 fc_fabric_logoff(lport); 1019 1020 /* Cleanup the fc_lport */ 1021 fc_lport_destroy(lport); 1022 1023 /* Stop the transmit retry timer */ 1024 del_timer_sync(&port->timer); 1025 1026 /* Free existing transmit skbs */ 1027 fcoe_clean_pending_queue(lport); 1028 1029 rtnl_lock(); 1030 if (!is_zero_ether_addr(port->data_src_addr)) 1031 dev_uc_del(netdev, port->data_src_addr); 1032 if (lport->vport) 1033 synchronize_net(); 1034 else 1035 fcoe_interface_remove(fcoe); 1036 rtnl_unlock(); 1037 1038 /* Free queued packets for the per-CPU receive threads */ 1039 fcoe_percpu_clean(lport); 1040 1041 /* Detach from the scsi-ml */ 1042 fc_remove_host(lport->host); 1043 scsi_remove_host(lport->host); 1044 1045 /* Destroy lport scsi_priv */ 1046 fc_fcp_destroy(lport); 1047 1048 /* There are no more rports or I/O, free the EM */ 1049 fc_exch_mgr_free(lport); 1050 1051 /* Free memory used by statistical counters */ 1052 fc_lport_free_stats(lport); 1053 1054 /* 1055 * Release the Scsi_Host for vport but hold on to 1056 * master lport until it fcoe interface fully cleaned-up. 1057 */ 1058 if (lport->vport) 1059 scsi_host_put(lport->host); 1060 } 1061 1062 /** 1063 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device 1064 * @lport: The local port to setup DDP for 1065 * @xid: The exchange ID for this DDP transfer 1066 * @sgl: The scatterlist describing this transfer 1067 * @sgc: The number of sg items 1068 * 1069 * Returns: 0 if the DDP context was not configured 1070 */ 1071 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, 1072 struct scatterlist *sgl, unsigned int sgc) 1073 { 1074 struct net_device *netdev = fcoe_netdev(lport); 1075 1076 if (netdev->netdev_ops->ndo_fcoe_ddp_setup) 1077 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, 1078 xid, sgl, 1079 sgc); 1080 1081 return 0; 1082 } 1083 1084 /** 1085 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device 1086 * @lport: The local port to setup DDP for 1087 * @xid: The exchange ID for this DDP transfer 1088 * @sgl: The scatterlist describing this transfer 1089 * @sgc: The number of sg items 1090 * 1091 * Returns: 0 if the DDP context was not configured 1092 */ 1093 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, 1094 struct scatterlist *sgl, unsigned int sgc) 1095 { 1096 struct net_device *netdev = fcoe_netdev(lport); 1097 1098 if (netdev->netdev_ops->ndo_fcoe_ddp_target) 1099 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, 1100 sgl, sgc); 1101 1102 return 0; 1103 } 1104 1105 1106 /** 1107 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device 1108 * @lport: The local port to complete DDP on 1109 * @xid: The exchange ID for this DDP transfer 1110 * 1111 * Returns: the length of data that have been completed by DDP 1112 */ 1113 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) 1114 { 1115 struct net_device *netdev = fcoe_netdev(lport); 1116 1117 if (netdev->netdev_ops->ndo_fcoe_ddp_done) 1118 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); 1119 return 0; 1120 } 1121 1122 /** 1123 * fcoe_if_create() - Create a FCoE instance on an interface 1124 * @fcoe: The FCoE interface to create a local port on 1125 * @parent: The device pointer to be the parent in sysfs for the SCSI host 1126 * @npiv: Indicates if the port is a vport or not 1127 * 1128 * Creates a fc_lport instance and a Scsi_Host instance and configure them. 1129 * 1130 * Returns: The allocated fc_lport or an error pointer 1131 */ 1132 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, 1133 struct device *parent, int npiv) 1134 { 1135 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1136 struct net_device *netdev = fcoe->netdev; 1137 struct fc_lport *lport, *n_port; 1138 struct fcoe_port *port; 1139 struct Scsi_Host *shost; 1140 int rc; 1141 /* 1142 * parent is only a vport if npiv is 1, 1143 * but we'll only use vport in that case so go ahead and set it 1144 */ 1145 struct fc_vport *vport = dev_to_vport(parent); 1146 1147 FCOE_NETDEV_DBG(netdev, "Create Interface\n"); 1148 1149 if (!npiv) 1150 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); 1151 else 1152 lport = libfc_vport_create(vport, sizeof(*port)); 1153 1154 if (!lport) { 1155 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); 1156 rc = -ENOMEM; 1157 goto out; 1158 } 1159 port = lport_priv(lport); 1160 port->lport = lport; 1161 port->priv = fcoe; 1162 port->get_netdev = fcoe_netdev; 1163 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; 1164 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; 1165 INIT_WORK(&port->destroy_work, fcoe_destroy_work); 1166 1167 /* 1168 * Need to add the lport to the hostlist 1169 * so we catch NETDEV_CHANGE events. 1170 */ 1171 fcoe_hostlist_add(lport); 1172 1173 /* configure a fc_lport including the exchange manager */ 1174 rc = fcoe_lport_config(lport); 1175 if (rc) { 1176 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " 1177 "interface\n"); 1178 goto out_host_put; 1179 } 1180 1181 if (npiv) { 1182 FCOE_NETDEV_DBG(netdev, "Setting vport names, " 1183 "%16.16llx %16.16llx\n", 1184 vport->node_name, vport->port_name); 1185 fc_set_wwnn(lport, vport->node_name); 1186 fc_set_wwpn(lport, vport->port_name); 1187 } 1188 1189 /* configure lport network properties */ 1190 rc = fcoe_netdev_config(lport, netdev); 1191 if (rc) { 1192 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " 1193 "interface\n"); 1194 goto out_lp_destroy; 1195 } 1196 1197 /* configure lport scsi host properties */ 1198 rc = fcoe_shost_config(lport, parent); 1199 if (rc) { 1200 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " 1201 "interface\n"); 1202 goto out_lp_destroy; 1203 } 1204 1205 /* Initialize the library */ 1206 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1); 1207 if (rc) { 1208 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " 1209 "interface\n"); 1210 goto out_lp_destroy; 1211 } 1212 1213 /* Initialized FDMI information */ 1214 fcoe_fdmi_info(lport, netdev); 1215 1216 /* 1217 * fcoe_em_alloc() and fcoe_hostlist_add() both 1218 * need to be atomic with respect to other changes to the 1219 * hostlist since fcoe_em_alloc() looks for an existing EM 1220 * instance on host list updated by fcoe_hostlist_add(). 1221 * 1222 * This is currently handled through the fcoe_config_mutex 1223 * begin held. 1224 */ 1225 if (!npiv) 1226 /* lport exch manager allocation */ 1227 rc = fcoe_em_config(lport); 1228 else { 1229 shost = vport_to_shost(vport); 1230 n_port = shost_priv(shost); 1231 rc = fc_exch_mgr_list_clone(n_port, lport); 1232 } 1233 1234 if (rc) { 1235 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); 1236 goto out_lp_destroy; 1237 } 1238 1239 return lport; 1240 1241 out_lp_destroy: 1242 fc_exch_mgr_free(lport); 1243 out_host_put: 1244 fcoe_hostlist_del(lport); 1245 scsi_host_put(lport->host); 1246 out: 1247 return ERR_PTR(rc); 1248 } 1249 1250 /** 1251 * fcoe_if_init() - Initialization routine for fcoe.ko 1252 * 1253 * Attaches the SW FCoE transport to the FC transport 1254 * 1255 * Returns: 0 on success 1256 */ 1257 static int __init fcoe_if_init(void) 1258 { 1259 /* attach to scsi transport */ 1260 fcoe_nport_scsi_transport = 1261 fc_attach_transport(&fcoe_nport_fc_functions); 1262 fcoe_vport_scsi_transport = 1263 fc_attach_transport(&fcoe_vport_fc_functions); 1264 1265 if (!fcoe_nport_scsi_transport) { 1266 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); 1267 return -ENODEV; 1268 } 1269 1270 return 0; 1271 } 1272 1273 /** 1274 * fcoe_if_exit() - Tear down fcoe.ko 1275 * 1276 * Detaches the SW FCoE transport from the FC transport 1277 * 1278 * Returns: 0 on success 1279 */ 1280 static int __exit fcoe_if_exit(void) 1281 { 1282 fc_release_transport(fcoe_nport_scsi_transport); 1283 fc_release_transport(fcoe_vport_scsi_transport); 1284 fcoe_nport_scsi_transport = NULL; 1285 fcoe_vport_scsi_transport = NULL; 1286 return 0; 1287 } 1288 1289 static void fcoe_thread_cleanup_local(unsigned int cpu) 1290 { 1291 struct page *crc_eof; 1292 struct fcoe_percpu_s *p; 1293 1294 p = per_cpu_ptr(&fcoe_percpu, cpu); 1295 spin_lock_bh(&p->fcoe_rx_list.lock); 1296 crc_eof = p->crc_eof_page; 1297 p->crc_eof_page = NULL; 1298 p->crc_eof_offset = 0; 1299 spin_unlock_bh(&p->fcoe_rx_list.lock); 1300 1301 if (crc_eof) 1302 put_page(crc_eof); 1303 flush_work(&p->work); 1304 } 1305 1306 /** 1307 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming 1308 * command. 1309 * 1310 * This routine selects next CPU based on cpumask to distribute 1311 * incoming requests in round robin. 1312 * 1313 * Returns: int CPU number 1314 */ 1315 static inline unsigned int fcoe_select_cpu(void) 1316 { 1317 static unsigned int selected_cpu; 1318 1319 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask); 1320 if (selected_cpu >= nr_cpu_ids) 1321 selected_cpu = cpumask_first(cpu_online_mask); 1322 1323 return selected_cpu; 1324 } 1325 1326 /** 1327 * fcoe_rcv() - Receive packets from a net device 1328 * @skb: The received packet 1329 * @netdev: The net device that the packet was received on 1330 * @ptype: The packet type context 1331 * @olddev: The last device net device 1332 * 1333 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a 1334 * FC frame and passes the frame to libfc. 1335 * 1336 * Returns: 0 for success 1337 */ 1338 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, 1339 struct packet_type *ptype, struct net_device *olddev) 1340 { 1341 struct fc_lport *lport; 1342 struct fcoe_rcv_info *fr; 1343 struct fcoe_ctlr *ctlr; 1344 struct fcoe_interface *fcoe; 1345 struct fc_frame_header *fh; 1346 struct fcoe_percpu_s *fps; 1347 struct ethhdr *eh; 1348 unsigned int cpu; 1349 1350 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); 1351 ctlr = fcoe_to_ctlr(fcoe); 1352 lport = ctlr->lp; 1353 if (unlikely(!lport)) { 1354 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n"); 1355 goto err2; 1356 } 1357 if (!lport->link_up) 1358 goto err2; 1359 1360 FCOE_NETDEV_DBG(netdev, 1361 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1362 skb->len, skb->data_len, skb->head, skb->data, 1363 skb_tail_pointer(skb), skb_end_pointer(skb), 1364 skb->csum, skb->dev ? skb->dev->name : "<NULL>"); 1365 1366 1367 skb = skb_share_check(skb, GFP_ATOMIC); 1368 1369 if (skb == NULL) 1370 return NET_RX_DROP; 1371 1372 eh = eth_hdr(skb); 1373 1374 if (is_fip_mode(ctlr) && 1375 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) { 1376 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", 1377 eh->h_source); 1378 goto err; 1379 } 1380 1381 /* 1382 * Check for minimum frame length, and make sure required FCoE 1383 * and FC headers are pulled into the linear data area. 1384 */ 1385 if (unlikely((skb->len < FCOE_MIN_FRAME) || 1386 !pskb_may_pull(skb, FCOE_HEADER_LEN))) 1387 goto err; 1388 1389 skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); 1390 fh = (struct fc_frame_header *) skb_transport_header(skb); 1391 1392 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { 1393 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", 1394 eh->h_dest); 1395 goto err; 1396 } 1397 1398 fr = fcoe_dev_from_skb(skb); 1399 fr->fr_dev = lport; 1400 1401 /* 1402 * In case the incoming frame's exchange is originated from 1403 * the initiator, then received frame's exchange id is ANDed 1404 * with fc_cpu_mask bits to get the same cpu on which exchange 1405 * was originated, otherwise select cpu using rx exchange id 1406 * or fcoe_select_cpu(). 1407 */ 1408 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) 1409 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; 1410 else { 1411 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN) 1412 cpu = fcoe_select_cpu(); 1413 else 1414 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; 1415 } 1416 1417 if (cpu >= nr_cpu_ids) 1418 goto err; 1419 1420 fps = &per_cpu(fcoe_percpu, cpu); 1421 spin_lock(&fps->fcoe_rx_list.lock); 1422 /* 1423 * We now have a valid CPU that we're targeting for 1424 * this skb. We also have this receive thread locked, 1425 * so we're free to queue skbs into it's queue. 1426 */ 1427 1428 /* 1429 * Note: We used to have a set of conditions under which we would 1430 * call fcoe_recv_frame directly, rather than queuing to the rx list 1431 * as it could save a few cycles, but doing so is prohibited, as 1432 * fcoe_recv_frame has several paths that may sleep, which is forbidden 1433 * in softirq context. 1434 */ 1435 __skb_queue_tail(&fps->fcoe_rx_list, skb); 1436 schedule_work_on(cpu, &fps->work); 1437 spin_unlock(&fps->fcoe_rx_list.lock); 1438 1439 return NET_RX_SUCCESS; 1440 err: 1441 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++; 1442 put_cpu(); 1443 err2: 1444 kfree_skb(skb); 1445 return NET_RX_DROP; 1446 } 1447 1448 /** 1449 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC 1450 * @skb: The packet to be transmitted 1451 * @tlen: The total length of the trailer 1452 * 1453 * Returns: 0 for success 1454 */ 1455 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) 1456 { 1457 struct fcoe_percpu_s *fps; 1458 int rc; 1459 1460 fps = &get_cpu_var(fcoe_percpu); 1461 rc = fcoe_get_paged_crc_eof(skb, tlen, fps); 1462 put_cpu_var(fcoe_percpu); 1463 1464 return rc; 1465 } 1466 1467 /** 1468 * fcoe_xmit() - Transmit a FCoE frame 1469 * @lport: The local port that the frame is to be transmitted for 1470 * @fp: The frame to be transmitted 1471 * 1472 * Return: 0 for success 1473 */ 1474 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) 1475 { 1476 int wlen; 1477 u32 crc; 1478 struct ethhdr *eh; 1479 struct fcoe_crc_eof *cp; 1480 struct sk_buff *skb; 1481 struct fc_stats *stats; 1482 struct fc_frame_header *fh; 1483 unsigned int hlen; /* header length implies the version */ 1484 unsigned int tlen; /* trailer length */ 1485 unsigned int elen; /* eth header, may include vlan */ 1486 struct fcoe_port *port = lport_priv(lport); 1487 struct fcoe_interface *fcoe = port->priv; 1488 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1489 u8 sof, eof; 1490 struct fcoe_hdr *hp; 1491 1492 WARN_ON((fr_len(fp) % sizeof(u32)) != 0); 1493 1494 fh = fc_frame_header_get(fp); 1495 skb = fp_skb(fp); 1496 wlen = skb->len / FCOE_WORD_TO_BYTE; 1497 1498 if (!lport->link_up) { 1499 kfree_skb(skb); 1500 return 0; 1501 } 1502 1503 if (unlikely(fh->fh_type == FC_TYPE_ELS) && 1504 fcoe_ctlr_els_send(ctlr, lport, skb)) 1505 return 0; 1506 1507 sof = fr_sof(fp); 1508 eof = fr_eof(fp); 1509 1510 elen = sizeof(struct ethhdr); 1511 hlen = sizeof(struct fcoe_hdr); 1512 tlen = sizeof(struct fcoe_crc_eof); 1513 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; 1514 1515 /* crc offload */ 1516 if (likely(lport->crc_offload)) { 1517 skb->ip_summed = CHECKSUM_PARTIAL; 1518 skb->csum_start = skb_headroom(skb); 1519 skb->csum_offset = skb->len; 1520 crc = 0; 1521 } else { 1522 skb->ip_summed = CHECKSUM_NONE; 1523 crc = fcoe_fc_crc(fp); 1524 } 1525 1526 /* copy port crc and eof to the skb buff */ 1527 if (skb_is_nonlinear(skb)) { 1528 skb_frag_t *frag; 1529 if (fcoe_alloc_paged_crc_eof(skb, tlen)) { 1530 kfree_skb(skb); 1531 return -ENOMEM; 1532 } 1533 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; 1534 cp = kmap_atomic(skb_frag_page(frag)) 1535 + frag->page_offset; 1536 } else { 1537 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); 1538 } 1539 1540 memset(cp, 0, sizeof(*cp)); 1541 cp->fcoe_eof = eof; 1542 cp->fcoe_crc32 = cpu_to_le32(~crc); 1543 1544 if (skb_is_nonlinear(skb)) { 1545 kunmap_atomic(cp); 1546 cp = NULL; 1547 } 1548 1549 /* adjust skb network/transport offsets to match mac/fcoe/port */ 1550 skb_push(skb, elen + hlen); 1551 skb_reset_mac_header(skb); 1552 skb_reset_network_header(skb); 1553 skb->mac_len = elen; 1554 skb->protocol = htons(ETH_P_FCOE); 1555 skb->priority = fcoe->priority; 1556 1557 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN && 1558 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) { 1559 /* must set skb->dev before calling vlan_put_tag */ 1560 skb->dev = fcoe->realdev; 1561 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1562 vlan_dev_vlan_id(fcoe->netdev)); 1563 } else 1564 skb->dev = fcoe->netdev; 1565 1566 /* fill up mac and fcoe headers */ 1567 eh = eth_hdr(skb); 1568 eh->h_proto = htons(ETH_P_FCOE); 1569 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN); 1570 if (ctlr->map_dest) 1571 memcpy(eh->h_dest + 3, fh->fh_d_id, 3); 1572 1573 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN)) 1574 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN); 1575 else 1576 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); 1577 1578 hp = (struct fcoe_hdr *)(eh + 1); 1579 memset(hp, 0, sizeof(*hp)); 1580 if (FC_FCOE_VER) 1581 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); 1582 hp->fcoe_sof = sof; 1583 1584 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ 1585 if (lport->seq_offload && fr_max_payload(fp)) { 1586 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; 1587 skb_shinfo(skb)->gso_size = fr_max_payload(fp); 1588 } else { 1589 skb_shinfo(skb)->gso_type = 0; 1590 skb_shinfo(skb)->gso_size = 0; 1591 } 1592 /* update tx stats: regardless if LLD fails */ 1593 stats = per_cpu_ptr(lport->stats, get_cpu()); 1594 stats->TxFrames++; 1595 stats->TxWords += wlen; 1596 put_cpu(); 1597 1598 /* send down to lld */ 1599 fr_dev(fp) = lport; 1600 fcoe_port_send(port, skb); 1601 return 0; 1602 } 1603 1604 /** 1605 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC 1606 * @lport: The local port the frame was received on 1607 * @fp: The received frame 1608 * 1609 * Return: 0 on passing filtering checks 1610 */ 1611 static inline int fcoe_filter_frames(struct fc_lport *lport, 1612 struct fc_frame *fp) 1613 { 1614 struct fcoe_ctlr *ctlr; 1615 struct fcoe_interface *fcoe; 1616 struct fc_frame_header *fh; 1617 struct sk_buff *skb = (struct sk_buff *)fp; 1618 struct fc_stats *stats; 1619 1620 /* 1621 * We only check CRC if no offload is available and if it is 1622 * it's solicited data, in which case, the FCP layer would 1623 * check it during the copy. 1624 */ 1625 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) 1626 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1627 else 1628 fr_flags(fp) |= FCPHF_CRC_UNCHECKED; 1629 1630 fh = (struct fc_frame_header *) skb_transport_header(skb); 1631 fh = fc_frame_header_get(fp); 1632 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) 1633 return 0; 1634 1635 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; 1636 ctlr = fcoe_to_ctlr(fcoe); 1637 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && 1638 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { 1639 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); 1640 return -EINVAL; 1641 } 1642 1643 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || 1644 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { 1645 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1646 return 0; 1647 } 1648 1649 stats = per_cpu_ptr(lport->stats, get_cpu()); 1650 stats->InvalidCRCCount++; 1651 if (stats->InvalidCRCCount < 5) 1652 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); 1653 put_cpu(); 1654 return -EINVAL; 1655 } 1656 1657 /** 1658 * fcoe_recv_frame() - process a single received frame 1659 * @skb: frame to process 1660 */ 1661 static void fcoe_recv_frame(struct sk_buff *skb) 1662 { 1663 u32 fr_len; 1664 struct fc_lport *lport; 1665 struct fcoe_rcv_info *fr; 1666 struct fc_stats *stats; 1667 struct fcoe_crc_eof crc_eof; 1668 struct fc_frame *fp; 1669 struct fcoe_port *port; 1670 struct fcoe_hdr *hp; 1671 1672 fr = fcoe_dev_from_skb(skb); 1673 lport = fr->fr_dev; 1674 if (unlikely(!lport)) { 1675 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n"); 1676 kfree_skb(skb); 1677 return; 1678 } 1679 1680 FCOE_NETDEV_DBG(skb->dev, 1681 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1682 skb->len, skb->data_len, 1683 skb->head, skb->data, skb_tail_pointer(skb), 1684 skb_end_pointer(skb), skb->csum, 1685 skb->dev ? skb->dev->name : "<NULL>"); 1686 1687 port = lport_priv(lport); 1688 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ 1689 1690 /* 1691 * Frame length checks and setting up the header pointers 1692 * was done in fcoe_rcv already. 1693 */ 1694 hp = (struct fcoe_hdr *) skb_network_header(skb); 1695 1696 stats = per_cpu_ptr(lport->stats, get_cpu()); 1697 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { 1698 if (stats->ErrorFrames < 5) 1699 printk(KERN_WARNING "fcoe: FCoE version " 1700 "mismatch: The frame has " 1701 "version %x, but the " 1702 "initiator supports version " 1703 "%x\n", FC_FCOE_DECAPS_VER(hp), 1704 FC_FCOE_VER); 1705 goto drop; 1706 } 1707 1708 skb_pull(skb, sizeof(struct fcoe_hdr)); 1709 fr_len = skb->len - sizeof(struct fcoe_crc_eof); 1710 1711 stats->RxFrames++; 1712 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; 1713 1714 fp = (struct fc_frame *)skb; 1715 fc_frame_init(fp); 1716 fr_dev(fp) = lport; 1717 fr_sof(fp) = hp->fcoe_sof; 1718 1719 /* Copy out the CRC and EOF trailer for access */ 1720 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) 1721 goto drop; 1722 fr_eof(fp) = crc_eof.fcoe_eof; 1723 fr_crc(fp) = crc_eof.fcoe_crc32; 1724 if (pskb_trim(skb, fr_len)) 1725 goto drop; 1726 1727 if (!fcoe_filter_frames(lport, fp)) { 1728 put_cpu(); 1729 fc_exch_recv(lport, fp); 1730 return; 1731 } 1732 drop: 1733 stats->ErrorFrames++; 1734 put_cpu(); 1735 kfree_skb(skb); 1736 } 1737 1738 /** 1739 * fcoe_receive_work() - The per-CPU worker 1740 * @work: The work struct 1741 * 1742 */ 1743 static void fcoe_receive_work(struct work_struct *work) 1744 { 1745 struct fcoe_percpu_s *p; 1746 struct sk_buff *skb; 1747 struct sk_buff_head tmp; 1748 1749 p = container_of(work, struct fcoe_percpu_s, work); 1750 skb_queue_head_init(&tmp); 1751 1752 spin_lock_bh(&p->fcoe_rx_list.lock); 1753 skb_queue_splice_init(&p->fcoe_rx_list, &tmp); 1754 spin_unlock_bh(&p->fcoe_rx_list.lock); 1755 1756 if (!skb_queue_len(&tmp)) 1757 return; 1758 1759 while ((skb = __skb_dequeue(&tmp))) 1760 fcoe_recv_frame(skb); 1761 } 1762 1763 /** 1764 * fcoe_dev_setup() - Setup the link change notification interface 1765 */ 1766 static void fcoe_dev_setup(void) 1767 { 1768 register_dcbevent_notifier(&dcb_notifier); 1769 register_netdevice_notifier(&fcoe_notifier); 1770 } 1771 1772 /** 1773 * fcoe_dev_cleanup() - Cleanup the link change notification interface 1774 */ 1775 static void fcoe_dev_cleanup(void) 1776 { 1777 unregister_dcbevent_notifier(&dcb_notifier); 1778 unregister_netdevice_notifier(&fcoe_notifier); 1779 } 1780 1781 static struct fcoe_interface * 1782 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev) 1783 { 1784 struct fcoe_interface *fcoe; 1785 struct net_device *real_dev; 1786 1787 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1788 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 1789 real_dev = vlan_dev_real_dev(fcoe->netdev); 1790 else 1791 real_dev = fcoe->netdev; 1792 1793 if (netdev == real_dev) 1794 return fcoe; 1795 } 1796 return NULL; 1797 } 1798 1799 static int fcoe_dcb_app_notification(struct notifier_block *notifier, 1800 ulong event, void *ptr) 1801 { 1802 struct dcb_app_type *entry = ptr; 1803 struct fcoe_ctlr *ctlr; 1804 struct fcoe_interface *fcoe; 1805 struct net_device *netdev; 1806 int prio; 1807 1808 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE) 1809 return NOTIFY_OK; 1810 1811 netdev = dev_get_by_index(&init_net, entry->ifindex); 1812 if (!netdev) 1813 return NOTIFY_OK; 1814 1815 fcoe = fcoe_hostlist_lookup_realdev_port(netdev); 1816 dev_put(netdev); 1817 if (!fcoe) 1818 return NOTIFY_OK; 1819 1820 ctlr = fcoe_to_ctlr(fcoe); 1821 1822 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE) 1823 prio = ffs(entry->app.priority) - 1; 1824 else 1825 prio = entry->app.priority; 1826 1827 if (prio < 0) 1828 return NOTIFY_OK; 1829 1830 if (entry->app.protocol == ETH_P_FIP || 1831 entry->app.protocol == ETH_P_FCOE) 1832 ctlr->priority = prio; 1833 1834 if (entry->app.protocol == ETH_P_FCOE) 1835 fcoe->priority = prio; 1836 1837 return NOTIFY_OK; 1838 } 1839 1840 /** 1841 * fcoe_device_notification() - Handler for net device events 1842 * @notifier: The context of the notification 1843 * @event: The type of event 1844 * @ptr: The net device that the event was on 1845 * 1846 * This function is called by the Ethernet driver in case of link change event. 1847 * 1848 * Returns: 0 for success 1849 */ 1850 static int fcoe_device_notification(struct notifier_block *notifier, 1851 ulong event, void *ptr) 1852 { 1853 struct fcoe_ctlr_device *cdev; 1854 struct fc_lport *lport = NULL; 1855 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 1856 struct fcoe_ctlr *ctlr; 1857 struct fcoe_interface *fcoe; 1858 struct fcoe_port *port; 1859 struct fc_stats *stats; 1860 u32 link_possible = 1; 1861 u32 mfs; 1862 int rc = NOTIFY_OK; 1863 1864 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1865 if (fcoe->netdev == netdev) { 1866 ctlr = fcoe_to_ctlr(fcoe); 1867 lport = ctlr->lp; 1868 break; 1869 } 1870 } 1871 if (!lport) { 1872 rc = NOTIFY_DONE; 1873 goto out; 1874 } 1875 1876 switch (event) { 1877 case NETDEV_DOWN: 1878 case NETDEV_GOING_DOWN: 1879 link_possible = 0; 1880 break; 1881 case NETDEV_UP: 1882 case NETDEV_CHANGE: 1883 break; 1884 case NETDEV_CHANGEMTU: 1885 if (netdev->features & NETIF_F_FCOE_MTU) 1886 break; 1887 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + 1888 sizeof(struct fcoe_crc_eof)); 1889 if (mfs >= FC_MIN_MAX_FRAME) 1890 fc_set_mfs(lport, mfs); 1891 break; 1892 case NETDEV_REGISTER: 1893 break; 1894 case NETDEV_UNREGISTER: 1895 list_del(&fcoe->list); 1896 port = lport_priv(ctlr->lp); 1897 queue_work(fcoe_wq, &port->destroy_work); 1898 goto out; 1899 break; 1900 case NETDEV_FEAT_CHANGE: 1901 fcoe_netdev_features_change(lport, netdev); 1902 break; 1903 default: 1904 FCOE_NETDEV_DBG(netdev, "Unknown event %ld " 1905 "from netdev netlink\n", event); 1906 } 1907 1908 fcoe_link_speed_update(lport); 1909 1910 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 1911 1912 if (link_possible && !fcoe_link_ok(lport)) { 1913 switch (cdev->enabled) { 1914 case FCOE_CTLR_DISABLED: 1915 pr_info("Link up while interface is disabled.\n"); 1916 break; 1917 case FCOE_CTLR_ENABLED: 1918 case FCOE_CTLR_UNUSED: 1919 fcoe_ctlr_link_up(ctlr); 1920 }; 1921 } else if (fcoe_ctlr_link_down(ctlr)) { 1922 switch (cdev->enabled) { 1923 case FCOE_CTLR_DISABLED: 1924 pr_info("Link down while interface is disabled.\n"); 1925 break; 1926 case FCOE_CTLR_ENABLED: 1927 case FCOE_CTLR_UNUSED: 1928 stats = per_cpu_ptr(lport->stats, get_cpu()); 1929 stats->LinkFailureCount++; 1930 put_cpu(); 1931 fcoe_clean_pending_queue(lport); 1932 }; 1933 } 1934 out: 1935 return rc; 1936 } 1937 1938 /** 1939 * fcoe_disable() - Disables a FCoE interface 1940 * @netdev : The net_device object the Ethernet interface to create on 1941 * 1942 * Called from fcoe transport. 1943 * 1944 * Returns: 0 for success 1945 * 1946 * Deprecated: use fcoe_ctlr_enabled() 1947 */ 1948 static int fcoe_disable(struct net_device *netdev) 1949 { 1950 struct fcoe_ctlr *ctlr; 1951 struct fcoe_interface *fcoe; 1952 int rc = 0; 1953 1954 mutex_lock(&fcoe_config_mutex); 1955 1956 rtnl_lock(); 1957 fcoe = fcoe_hostlist_lookup_port(netdev); 1958 rtnl_unlock(); 1959 1960 if (fcoe) { 1961 ctlr = fcoe_to_ctlr(fcoe); 1962 fcoe_ctlr_link_down(ctlr); 1963 fcoe_clean_pending_queue(ctlr->lp); 1964 } else 1965 rc = -ENODEV; 1966 1967 mutex_unlock(&fcoe_config_mutex); 1968 return rc; 1969 } 1970 1971 /** 1972 * fcoe_enable() - Enables a FCoE interface 1973 * @netdev : The net_device object the Ethernet interface to create on 1974 * 1975 * Called from fcoe transport. 1976 * 1977 * Returns: 0 for success 1978 */ 1979 static int fcoe_enable(struct net_device *netdev) 1980 { 1981 struct fcoe_ctlr *ctlr; 1982 struct fcoe_interface *fcoe; 1983 int rc = 0; 1984 1985 mutex_lock(&fcoe_config_mutex); 1986 rtnl_lock(); 1987 fcoe = fcoe_hostlist_lookup_port(netdev); 1988 rtnl_unlock(); 1989 1990 if (!fcoe) { 1991 rc = -ENODEV; 1992 goto out; 1993 } 1994 1995 ctlr = fcoe_to_ctlr(fcoe); 1996 1997 if (!fcoe_link_ok(ctlr->lp)) 1998 fcoe_ctlr_link_up(ctlr); 1999 2000 out: 2001 mutex_unlock(&fcoe_config_mutex); 2002 return rc; 2003 } 2004 2005 /** 2006 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller 2007 * @cdev: The FCoE Controller that is being enabled or disabled 2008 * 2009 * fcoe_sysfs will ensure that the state of 'enabled' has 2010 * changed, so no checking is necessary here. This routine simply 2011 * calls fcoe_enable or fcoe_disable, both of which are deprecated. 2012 * When those routines are removed the functionality can be merged 2013 * here. 2014 */ 2015 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev) 2016 { 2017 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev); 2018 struct fc_lport *lport = ctlr->lp; 2019 struct net_device *netdev = fcoe_netdev(lport); 2020 2021 switch (cdev->enabled) { 2022 case FCOE_CTLR_ENABLED: 2023 return fcoe_enable(netdev); 2024 case FCOE_CTLR_DISABLED: 2025 return fcoe_disable(netdev); 2026 case FCOE_CTLR_UNUSED: 2027 default: 2028 return -ENOTSUPP; 2029 }; 2030 } 2031 2032 /** 2033 * fcoe_ctlr_mode() - Switch FIP mode 2034 * @cdev: The FCoE Controller that is being modified 2035 * 2036 * When the FIP mode has been changed we need to update 2037 * the multicast addresses to ensure we get the correct 2038 * frames. 2039 */ 2040 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev) 2041 { 2042 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2043 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2044 2045 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN && 2046 ctlr->mode != FIP_MODE_VN2VN) { 2047 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS); 2048 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2049 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS); 2050 } else if (ctlr->mode != FIP_MODE_FABRIC) { 2051 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2052 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS); 2053 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS); 2054 } 2055 fcoe_ctlr_set_fip_mode(ctlr_dev); 2056 } 2057 2058 /** 2059 * fcoe_destroy() - Destroy a FCoE interface 2060 * @netdev : The net_device object the Ethernet interface to create on 2061 * 2062 * Called from fcoe transport 2063 * 2064 * Returns: 0 for success 2065 */ 2066 static int fcoe_destroy(struct net_device *netdev) 2067 { 2068 struct fcoe_ctlr *ctlr; 2069 struct fcoe_interface *fcoe; 2070 struct fc_lport *lport; 2071 struct fcoe_port *port; 2072 int rc = 0; 2073 2074 mutex_lock(&fcoe_config_mutex); 2075 rtnl_lock(); 2076 fcoe = fcoe_hostlist_lookup_port(netdev); 2077 if (!fcoe) { 2078 rc = -ENODEV; 2079 goto out_nodev; 2080 } 2081 ctlr = fcoe_to_ctlr(fcoe); 2082 lport = ctlr->lp; 2083 port = lport_priv(lport); 2084 list_del(&fcoe->list); 2085 queue_work(fcoe_wq, &port->destroy_work); 2086 out_nodev: 2087 rtnl_unlock(); 2088 mutex_unlock(&fcoe_config_mutex); 2089 return rc; 2090 } 2091 2092 /** 2093 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context 2094 * @work: Handle to the FCoE port to be destroyed 2095 */ 2096 static void fcoe_destroy_work(struct work_struct *work) 2097 { 2098 struct fcoe_ctlr_device *cdev; 2099 struct fcoe_ctlr *ctlr; 2100 struct fcoe_port *port; 2101 struct fcoe_interface *fcoe; 2102 struct Scsi_Host *shost; 2103 struct fc_host_attrs *fc_host; 2104 unsigned long flags; 2105 struct fc_vport *vport; 2106 struct fc_vport *next_vport; 2107 2108 port = container_of(work, struct fcoe_port, destroy_work); 2109 shost = port->lport->host; 2110 fc_host = shost_to_fc_host(shost); 2111 2112 /* Loop through all the vports and mark them for deletion */ 2113 spin_lock_irqsave(shost->host_lock, flags); 2114 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2115 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 2116 continue; 2117 } else { 2118 vport->flags |= FC_VPORT_DELETING; 2119 queue_work(fc_host_work_q(shost), 2120 &vport->vport_delete_work); 2121 } 2122 } 2123 spin_unlock_irqrestore(shost->host_lock, flags); 2124 2125 flush_workqueue(fc_host_work_q(shost)); 2126 2127 mutex_lock(&fcoe_config_mutex); 2128 2129 fcoe = port->priv; 2130 ctlr = fcoe_to_ctlr(fcoe); 2131 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2132 2133 fcoe_if_destroy(port->lport); 2134 fcoe_interface_cleanup(fcoe); 2135 2136 mutex_unlock(&fcoe_config_mutex); 2137 2138 fcoe_ctlr_device_delete(cdev); 2139 } 2140 2141 /** 2142 * fcoe_match() - Check if the FCoE is supported on the given netdevice 2143 * @netdev : The net_device object the Ethernet interface to create on 2144 * 2145 * Called from fcoe transport. 2146 * 2147 * Returns: always returns true as this is the default FCoE transport, 2148 * i.e., support all netdevs. 2149 */ 2150 static bool fcoe_match(struct net_device *netdev) 2151 { 2152 return true; 2153 } 2154 2155 /** 2156 * fcoe_dcb_create() - Initialize DCB attributes and hooks 2157 * @netdev: The net_device object of the L2 link that should be queried 2158 * @port: The fcoe_port to bind FCoE APP priority with 2159 * @ 2160 */ 2161 static void fcoe_dcb_create(struct fcoe_interface *fcoe) 2162 { 2163 #ifdef CONFIG_DCB 2164 int dcbx; 2165 u8 fup, up; 2166 struct net_device *netdev = fcoe->realdev; 2167 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2168 struct dcb_app app = { 2169 .priority = 0, 2170 .protocol = ETH_P_FCOE 2171 }; 2172 2173 /* setup DCB priority attributes. */ 2174 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) { 2175 dcbx = netdev->dcbnl_ops->getdcbx(netdev); 2176 2177 if (dcbx & DCB_CAP_DCBX_VER_IEEE) { 2178 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; 2179 up = dcb_ieee_getapp_mask(netdev, &app); 2180 app.protocol = ETH_P_FIP; 2181 fup = dcb_ieee_getapp_mask(netdev, &app); 2182 } else { 2183 app.selector = DCB_APP_IDTYPE_ETHTYPE; 2184 up = dcb_getapp(netdev, &app); 2185 app.protocol = ETH_P_FIP; 2186 fup = dcb_getapp(netdev, &app); 2187 } 2188 2189 fcoe->priority = ffs(up) ? ffs(up) - 1 : 0; 2190 ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority; 2191 } 2192 #endif 2193 } 2194 2195 enum fcoe_create_link_state { 2196 FCOE_CREATE_LINK_DOWN, 2197 FCOE_CREATE_LINK_UP, 2198 }; 2199 2200 /** 2201 * _fcoe_create() - (internal) Create a fcoe interface 2202 * @netdev : The net_device object the Ethernet interface to create on 2203 * @fip_mode: The FIP mode for this creation 2204 * @link_state: The ctlr link state on creation 2205 * 2206 * Called from either the libfcoe 'create' module parameter 2207 * via fcoe_create or from fcoe_syfs's ctlr_create file. 2208 * 2209 * libfcoe's 'create' module parameter is deprecated so some 2210 * consolidation of code can be done when that interface is 2211 * removed. 2212 */ 2213 static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode, 2214 enum fcoe_create_link_state link_state) 2215 { 2216 int rc = 0; 2217 struct fcoe_ctlr_device *ctlr_dev; 2218 struct fcoe_ctlr *ctlr; 2219 struct fcoe_interface *fcoe; 2220 struct fc_lport *lport; 2221 2222 mutex_lock(&fcoe_config_mutex); 2223 rtnl_lock(); 2224 2225 /* look for existing lport */ 2226 if (fcoe_hostlist_lookup(netdev)) { 2227 rc = -EEXIST; 2228 goto out_nodev; 2229 } 2230 2231 fcoe = fcoe_interface_create(netdev, fip_mode); 2232 if (IS_ERR(fcoe)) { 2233 rc = PTR_ERR(fcoe); 2234 goto out_nodev; 2235 } 2236 2237 ctlr = fcoe_to_ctlr(fcoe); 2238 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr); 2239 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0); 2240 if (IS_ERR(lport)) { 2241 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", 2242 netdev->name); 2243 rc = -EIO; 2244 rtnl_unlock(); 2245 fcoe_interface_cleanup(fcoe); 2246 mutex_unlock(&fcoe_config_mutex); 2247 fcoe_ctlr_device_delete(ctlr_dev); 2248 goto out; 2249 } 2250 2251 /* Make this the "master" N_Port */ 2252 ctlr->lp = lport; 2253 2254 /* setup DCB priority attributes. */ 2255 fcoe_dcb_create(fcoe); 2256 2257 /* start FIP Discovery and FLOGI */ 2258 lport->boot_time = jiffies; 2259 fc_fabric_login(lport); 2260 2261 /* 2262 * If the fcoe_ctlr_device is to be set to DISABLED 2263 * it must be done after the lport is added to the 2264 * hostlist, but before the rtnl_lock is released. 2265 * This is because the rtnl_lock protects the 2266 * hostlist that fcoe_device_notification uses. If 2267 * the FCoE Controller is intended to be created 2268 * DISABLED then 'enabled' needs to be considered 2269 * handling link events. 'enabled' must be set 2270 * before the lport can be found in the hostlist 2271 * when a link up event is received. 2272 */ 2273 if (link_state == FCOE_CREATE_LINK_UP) 2274 ctlr_dev->enabled = FCOE_CTLR_ENABLED; 2275 else 2276 ctlr_dev->enabled = FCOE_CTLR_DISABLED; 2277 2278 if (link_state == FCOE_CREATE_LINK_UP && 2279 !fcoe_link_ok(lport)) { 2280 rtnl_unlock(); 2281 fcoe_ctlr_link_up(ctlr); 2282 mutex_unlock(&fcoe_config_mutex); 2283 return rc; 2284 } 2285 2286 out_nodev: 2287 rtnl_unlock(); 2288 mutex_unlock(&fcoe_config_mutex); 2289 out: 2290 return rc; 2291 } 2292 2293 /** 2294 * fcoe_create() - Create a fcoe interface 2295 * @netdev : The net_device object the Ethernet interface to create on 2296 * @fip_mode: The FIP mode for this creation 2297 * 2298 * Called from fcoe transport 2299 * 2300 * Returns: 0 for success 2301 */ 2302 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode) 2303 { 2304 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP); 2305 } 2306 2307 /** 2308 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs 2309 * @netdev: The net_device to be used by the allocated FCoE Controller 2310 * 2311 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr 2312 * in a link_down state. The allows the user an opportunity to configure 2313 * the FCoE Controller from sysfs before enabling the FCoE Controller. 2314 * 2315 * Creating in with this routine starts the FCoE Controller in Fabric 2316 * mode. The user can change to VN2VN or another mode before enabling. 2317 */ 2318 static int fcoe_ctlr_alloc(struct net_device *netdev) 2319 { 2320 return _fcoe_create(netdev, FIP_MODE_FABRIC, 2321 FCOE_CREATE_LINK_DOWN); 2322 } 2323 2324 /** 2325 * fcoe_link_ok() - Check if the link is OK for a local port 2326 * @lport: The local port to check link on 2327 * 2328 * Returns: 0 if link is UP and OK, -1 if not 2329 * 2330 */ 2331 static int fcoe_link_ok(struct fc_lport *lport) 2332 { 2333 struct net_device *netdev = fcoe_netdev(lport); 2334 2335 if (netif_oper_up(netdev)) 2336 return 0; 2337 return -1; 2338 } 2339 2340 /** 2341 * fcoe_percpu_clean() - Clear all pending skbs for an local port 2342 * @lport: The local port whose skbs are to be cleared 2343 * 2344 * Must be called with fcoe_create_mutex held to single-thread completion. 2345 * 2346 * This flushes the pending skbs by flush the work item for each CPU. The work 2347 * item on each possible CPU is flushed because we may have used the per-CPU 2348 * struct of an offline CPU. 2349 */ 2350 static void fcoe_percpu_clean(struct fc_lport *lport) 2351 { 2352 struct fcoe_percpu_s *pp; 2353 unsigned int cpu; 2354 2355 for_each_possible_cpu(cpu) { 2356 pp = &per_cpu(fcoe_percpu, cpu); 2357 2358 flush_work(&pp->work); 2359 } 2360 } 2361 2362 /** 2363 * fcoe_reset() - Reset a local port 2364 * @shost: The SCSI host associated with the local port to be reset 2365 * 2366 * Returns: Always 0 (return value required by FC transport template) 2367 */ 2368 static int fcoe_reset(struct Scsi_Host *shost) 2369 { 2370 struct fc_lport *lport = shost_priv(shost); 2371 struct fcoe_port *port = lport_priv(lport); 2372 struct fcoe_interface *fcoe = port->priv; 2373 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2374 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2375 2376 fcoe_ctlr_link_down(ctlr); 2377 fcoe_clean_pending_queue(ctlr->lp); 2378 2379 if (cdev->enabled != FCOE_CTLR_DISABLED && 2380 !fcoe_link_ok(ctlr->lp)) 2381 fcoe_ctlr_link_up(ctlr); 2382 return 0; 2383 } 2384 2385 /** 2386 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device 2387 * @netdev: The net device used as a key 2388 * 2389 * Locking: Must be called with the RNL mutex held. 2390 * 2391 * Returns: NULL or the FCoE interface 2392 */ 2393 static struct fcoe_interface * 2394 fcoe_hostlist_lookup_port(const struct net_device *netdev) 2395 { 2396 struct fcoe_interface *fcoe; 2397 2398 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 2399 if (fcoe->netdev == netdev) 2400 return fcoe; 2401 } 2402 return NULL; 2403 } 2404 2405 /** 2406 * fcoe_hostlist_lookup() - Find the local port associated with a 2407 * given net device 2408 * @netdev: The netdevice used as a key 2409 * 2410 * Locking: Must be called with the RTNL mutex held 2411 * 2412 * Returns: NULL or the local port 2413 */ 2414 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) 2415 { 2416 struct fcoe_ctlr *ctlr; 2417 struct fcoe_interface *fcoe; 2418 2419 fcoe = fcoe_hostlist_lookup_port(netdev); 2420 ctlr = fcoe_to_ctlr(fcoe); 2421 return (fcoe) ? ctlr->lp : NULL; 2422 } 2423 2424 /** 2425 * fcoe_hostlist_add() - Add the FCoE interface identified by a local 2426 * port to the hostlist 2427 * @lport: The local port that identifies the FCoE interface to be added 2428 * 2429 * Locking: must be called with the RTNL mutex held 2430 * 2431 * Returns: 0 for success 2432 */ 2433 static int fcoe_hostlist_add(const struct fc_lport *lport) 2434 { 2435 struct fcoe_interface *fcoe; 2436 struct fcoe_port *port; 2437 2438 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); 2439 if (!fcoe) { 2440 port = lport_priv(lport); 2441 fcoe = port->priv; 2442 list_add_tail(&fcoe->list, &fcoe_hostlist); 2443 } 2444 return 0; 2445 } 2446 2447 /** 2448 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local 2449 * port to the hostlist 2450 * @lport: The local port that identifies the FCoE interface to be added 2451 * 2452 * Locking: must be called with the RTNL mutex held 2453 * 2454 */ 2455 static void fcoe_hostlist_del(const struct fc_lport *lport) 2456 { 2457 struct fcoe_interface *fcoe; 2458 struct fcoe_port *port; 2459 2460 port = lport_priv(lport); 2461 fcoe = port->priv; 2462 list_del(&fcoe->list); 2463 return; 2464 } 2465 2466 static struct fcoe_transport fcoe_sw_transport = { 2467 .name = {FCOE_TRANSPORT_DEFAULT}, 2468 .attached = false, 2469 .list = LIST_HEAD_INIT(fcoe_sw_transport.list), 2470 .match = fcoe_match, 2471 .alloc = fcoe_ctlr_alloc, 2472 .create = fcoe_create, 2473 .destroy = fcoe_destroy, 2474 .enable = fcoe_enable, 2475 .disable = fcoe_disable, 2476 }; 2477 2478 /** 2479 * fcoe_init() - Initialize fcoe.ko 2480 * 2481 * Returns: 0 on success, or a negative value on failure 2482 */ 2483 static int __init fcoe_init(void) 2484 { 2485 struct fcoe_percpu_s *p; 2486 unsigned int cpu; 2487 int rc = 0; 2488 2489 fcoe_wq = alloc_workqueue("fcoe", 0, 0); 2490 if (!fcoe_wq) 2491 return -ENOMEM; 2492 2493 /* register as a fcoe transport */ 2494 rc = fcoe_transport_attach(&fcoe_sw_transport); 2495 if (rc) { 2496 printk(KERN_ERR "failed to register an fcoe transport, check " 2497 "if libfcoe is loaded\n"); 2498 goto out_destroy; 2499 } 2500 2501 mutex_lock(&fcoe_config_mutex); 2502 2503 for_each_possible_cpu(cpu) { 2504 p = per_cpu_ptr(&fcoe_percpu, cpu); 2505 INIT_WORK(&p->work, fcoe_receive_work); 2506 skb_queue_head_init(&p->fcoe_rx_list); 2507 } 2508 2509 /* Setup link change notification */ 2510 fcoe_dev_setup(); 2511 2512 rc = fcoe_if_init(); 2513 if (rc) 2514 goto out_free; 2515 2516 mutex_unlock(&fcoe_config_mutex); 2517 return 0; 2518 2519 out_free: 2520 mutex_unlock(&fcoe_config_mutex); 2521 out_destroy: 2522 destroy_workqueue(fcoe_wq); 2523 return rc; 2524 } 2525 module_init(fcoe_init); 2526 2527 /** 2528 * fcoe_exit() - Clean up fcoe.ko 2529 * 2530 * Returns: 0 on success or a negative value on failure 2531 */ 2532 static void __exit fcoe_exit(void) 2533 { 2534 struct fcoe_interface *fcoe, *tmp; 2535 struct fcoe_ctlr *ctlr; 2536 struct fcoe_port *port; 2537 unsigned int cpu; 2538 2539 mutex_lock(&fcoe_config_mutex); 2540 2541 fcoe_dev_cleanup(); 2542 2543 /* releases the associated fcoe hosts */ 2544 rtnl_lock(); 2545 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { 2546 ctlr = fcoe_to_ctlr(fcoe); 2547 port = lport_priv(ctlr->lp); 2548 fcoe_hostlist_del(port->lport); 2549 queue_work(fcoe_wq, &port->destroy_work); 2550 } 2551 rtnl_unlock(); 2552 2553 for_each_possible_cpu(cpu) 2554 fcoe_thread_cleanup_local(cpu); 2555 2556 mutex_unlock(&fcoe_config_mutex); 2557 2558 /* 2559 * destroy_work's may be chained but destroy_workqueue() 2560 * can take care of them. Just kill the fcoe_wq. 2561 */ 2562 destroy_workqueue(fcoe_wq); 2563 2564 /* 2565 * Detaching from the scsi transport must happen after all 2566 * destroys are done on the fcoe_wq. destroy_workqueue will 2567 * enusre the fcoe_wq is flushed. 2568 */ 2569 fcoe_if_exit(); 2570 2571 /* detach from fcoe transport */ 2572 fcoe_transport_detach(&fcoe_sw_transport); 2573 } 2574 module_exit(fcoe_exit); 2575 2576 /** 2577 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler 2578 * @seq: active sequence in the FLOGI or FDISC exchange 2579 * @fp: response frame, or error encoded in a pointer (timeout) 2580 * @arg: pointer the the fcoe_ctlr structure 2581 * 2582 * This handles MAC address management for FCoE, then passes control on to 2583 * the libfc FLOGI response handler. 2584 */ 2585 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2586 { 2587 struct fcoe_ctlr *fip = arg; 2588 struct fc_exch *exch = fc_seq_exch(seq); 2589 struct fc_lport *lport = exch->lp; 2590 u8 *mac; 2591 2592 if (IS_ERR(fp)) 2593 goto done; 2594 2595 mac = fr_cb(fp)->granted_mac; 2596 /* pre-FIP */ 2597 if (is_zero_ether_addr(mac)) 2598 fcoe_ctlr_recv_flogi(fip, lport, fp); 2599 if (!is_zero_ether_addr(mac)) 2600 fcoe_update_src_mac(lport, mac); 2601 done: 2602 fc_lport_flogi_resp(seq, fp, lport); 2603 } 2604 2605 /** 2606 * fcoe_logo_resp() - FCoE specific LOGO response handler 2607 * @seq: active sequence in the LOGO exchange 2608 * @fp: response frame, or error encoded in a pointer (timeout) 2609 * @arg: pointer the the fcoe_ctlr structure 2610 * 2611 * This handles MAC address management for FCoE, then passes control on to 2612 * the libfc LOGO response handler. 2613 */ 2614 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2615 { 2616 struct fc_lport *lport = arg; 2617 static u8 zero_mac[ETH_ALEN] = { 0 }; 2618 2619 if (!IS_ERR(fp)) 2620 fcoe_update_src_mac(lport, zero_mac); 2621 fc_lport_logo_resp(seq, fp, lport); 2622 } 2623 2624 /** 2625 * fcoe_elsct_send - FCoE specific ELS handler 2626 * 2627 * This does special case handling of FIP encapsualted ELS exchanges for FCoE, 2628 * using FCoE specific response handlers and passing the FIP controller as 2629 * the argument (the lport is still available from the exchange). 2630 * 2631 * Most of the work here is just handed off to the libfc routine. 2632 */ 2633 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, 2634 struct fc_frame *fp, unsigned int op, 2635 void (*resp)(struct fc_seq *, 2636 struct fc_frame *, 2637 void *), 2638 void *arg, u32 timeout) 2639 { 2640 struct fcoe_port *port = lport_priv(lport); 2641 struct fcoe_interface *fcoe = port->priv; 2642 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 2643 struct fc_frame_header *fh = fc_frame_header_get(fp); 2644 2645 switch (op) { 2646 case ELS_FLOGI: 2647 case ELS_FDISC: 2648 if (lport->point_to_multipoint) 2649 break; 2650 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, 2651 fip, timeout); 2652 case ELS_LOGO: 2653 /* only hook onto fabric logouts, not port logouts */ 2654 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) 2655 break; 2656 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, 2657 lport, timeout); 2658 } 2659 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); 2660 } 2661 2662 /** 2663 * fcoe_vport_create() - create an fc_host/scsi_host for a vport 2664 * @vport: fc_vport object to create a new fc_host for 2665 * @disabled: start the new fc_host in a disabled state by default? 2666 * 2667 * Returns: 0 for success 2668 */ 2669 static int fcoe_vport_create(struct fc_vport *vport, bool disabled) 2670 { 2671 struct Scsi_Host *shost = vport_to_shost(vport); 2672 struct fc_lport *n_port = shost_priv(shost); 2673 struct fcoe_port *port = lport_priv(n_port); 2674 struct fcoe_interface *fcoe = port->priv; 2675 struct net_device *netdev = fcoe->netdev; 2676 struct fc_lport *vn_port; 2677 int rc; 2678 char buf[32]; 2679 2680 rc = fcoe_validate_vport_create(vport); 2681 if (rc) { 2682 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf)); 2683 printk(KERN_ERR "fcoe: Failed to create vport, " 2684 "WWPN (0x%s) already exists\n", 2685 buf); 2686 return rc; 2687 } 2688 2689 mutex_lock(&fcoe_config_mutex); 2690 rtnl_lock(); 2691 vn_port = fcoe_if_create(fcoe, &vport->dev, 1); 2692 rtnl_unlock(); 2693 mutex_unlock(&fcoe_config_mutex); 2694 2695 if (IS_ERR(vn_port)) { 2696 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", 2697 netdev->name); 2698 return -EIO; 2699 } 2700 2701 if (disabled) { 2702 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2703 } else { 2704 vn_port->boot_time = jiffies; 2705 fc_fabric_login(vn_port); 2706 fc_vport_setlink(vn_port); 2707 } 2708 return 0; 2709 } 2710 2711 /** 2712 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport 2713 * @vport: fc_vport object that is being destroyed 2714 * 2715 * Returns: 0 for success 2716 */ 2717 static int fcoe_vport_destroy(struct fc_vport *vport) 2718 { 2719 struct Scsi_Host *shost = vport_to_shost(vport); 2720 struct fc_lport *n_port = shost_priv(shost); 2721 struct fc_lport *vn_port = vport->dd_data; 2722 2723 mutex_lock(&n_port->lp_mutex); 2724 list_del(&vn_port->list); 2725 mutex_unlock(&n_port->lp_mutex); 2726 2727 mutex_lock(&fcoe_config_mutex); 2728 fcoe_if_destroy(vn_port); 2729 mutex_unlock(&fcoe_config_mutex); 2730 2731 return 0; 2732 } 2733 2734 /** 2735 * fcoe_vport_disable() - change vport state 2736 * @vport: vport to bring online/offline 2737 * @disable: should the vport be disabled? 2738 */ 2739 static int fcoe_vport_disable(struct fc_vport *vport, bool disable) 2740 { 2741 struct fc_lport *lport = vport->dd_data; 2742 2743 if (disable) { 2744 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2745 fc_fabric_logoff(lport); 2746 } else { 2747 lport->boot_time = jiffies; 2748 fc_fabric_login(lport); 2749 fc_vport_setlink(lport); 2750 } 2751 2752 return 0; 2753 } 2754 2755 /** 2756 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name 2757 * @vport: fc_vport with a new symbolic name string 2758 * 2759 * After generating a new symbolic name string, a new RSPN_ID request is 2760 * sent to the name server. There is no response handler, so if it fails 2761 * for some reason it will not be retried. 2762 */ 2763 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) 2764 { 2765 struct fc_lport *lport = vport->dd_data; 2766 struct fc_frame *fp; 2767 size_t len; 2768 2769 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 2770 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, 2771 fcoe_netdev(lport)->name, vport->symbolic_name); 2772 2773 if (lport->state != LPORT_ST_READY) 2774 return; 2775 2776 len = strnlen(fc_host_symbolic_name(lport->host), 255); 2777 fp = fc_frame_alloc(lport, 2778 sizeof(struct fc_ct_hdr) + 2779 sizeof(struct fc_ns_rspn) + len); 2780 if (!fp) 2781 return; 2782 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, 2783 NULL, NULL, 3 * lport->r_a_tov); 2784 } 2785 2786 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev) 2787 { 2788 struct fcoe_ctlr_device *ctlr_dev = 2789 fcoe_fcf_dev_to_ctlr_dev(fcf_dev); 2790 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2791 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2792 2793 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev); 2794 } 2795 2796 /** 2797 * fcoe_set_port_id() - Callback from libfc when Port_ID is set. 2798 * @lport: the local port 2799 * @port_id: the port ID 2800 * @fp: the received frame, if any, that caused the port_id to be set. 2801 * 2802 * This routine handles the case where we received a FLOGI and are 2803 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() 2804 * so it can set the non-mapped mode and gateway address. 2805 * 2806 * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). 2807 */ 2808 static void fcoe_set_port_id(struct fc_lport *lport, 2809 u32 port_id, struct fc_frame *fp) 2810 { 2811 struct fcoe_port *port = lport_priv(lport); 2812 struct fcoe_interface *fcoe = port->priv; 2813 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2814 2815 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) 2816 fcoe_ctlr_recv_flogi(ctlr, lport, fp); 2817 } 2818