1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. 4 * 5 * Maintained at www.Open-FCoE.org 6 */ 7 8 #include <linux/module.h> 9 #include <linux/spinlock.h> 10 #include <linux/netdevice.h> 11 #include <linux/etherdevice.h> 12 #include <linux/ethtool.h> 13 #include <linux/if_ether.h> 14 #include <linux/if_vlan.h> 15 #include <linux/crc32.h> 16 #include <linux/slab.h> 17 #include <linux/cpu.h> 18 #include <linux/fs.h> 19 #include <linux/sysfs.h> 20 #include <linux/ctype.h> 21 #include <linux/workqueue.h> 22 #include <net/dcbnl.h> 23 #include <net/dcbevent.h> 24 #include <scsi/scsi_tcq.h> 25 #include <scsi/scsicam.h> 26 #include <scsi/scsi_transport.h> 27 #include <scsi/scsi_transport_fc.h> 28 #include <net/rtnetlink.h> 29 30 #include <scsi/fc/fc_encaps.h> 31 #include <scsi/fc/fc_fip.h> 32 #include <scsi/fc/fc_fcoe.h> 33 34 #include <scsi/libfc.h> 35 #include <scsi/fc_frame.h> 36 #include <scsi/libfcoe.h> 37 38 #include "fcoe.h" 39 40 MODULE_AUTHOR("Open-FCoE.org"); 41 MODULE_DESCRIPTION("FCoE"); 42 MODULE_LICENSE("GPL v2"); 43 44 /* Performance tuning parameters for fcoe */ 45 static unsigned int fcoe_ddp_min = 4096; 46 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); 47 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ 48 "Direct Data Placement (DDP)."); 49 50 unsigned int fcoe_debug_logging; 51 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR); 52 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); 53 54 static unsigned int fcoe_e_d_tov = 2 * 1000; 55 module_param_named(e_d_tov, fcoe_e_d_tov, int, S_IRUGO|S_IWUSR); 56 MODULE_PARM_DESC(e_d_tov, "E_D_TOV in ms, default 2000"); 57 58 static unsigned int fcoe_r_a_tov = 2 * 2 * 1000; 59 module_param_named(r_a_tov, fcoe_r_a_tov, int, S_IRUGO|S_IWUSR); 60 MODULE_PARM_DESC(r_a_tov, "R_A_TOV in ms, default 4000"); 61 62 static DEFINE_MUTEX(fcoe_config_mutex); 63 64 static struct workqueue_struct *fcoe_wq; 65 66 /* fcoe host list */ 67 /* must only by accessed under the RTNL mutex */ 68 static LIST_HEAD(fcoe_hostlist); 69 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); 70 71 /* Function Prototypes */ 72 static int fcoe_reset(struct Scsi_Host *); 73 static int fcoe_xmit(struct fc_lport *, struct fc_frame *); 74 static int fcoe_rcv(struct sk_buff *, struct net_device *, 75 struct packet_type *, struct net_device *); 76 static void fcoe_percpu_clean(struct fc_lport *); 77 static int fcoe_link_ok(struct fc_lport *); 78 79 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); 80 static int fcoe_hostlist_add(const struct fc_lport *); 81 static void fcoe_hostlist_del(const struct fc_lport *); 82 83 static int fcoe_device_notification(struct notifier_block *, ulong, void *); 84 static void fcoe_dev_setup(void); 85 static void fcoe_dev_cleanup(void); 86 static struct fcoe_interface 87 *fcoe_hostlist_lookup_port(const struct net_device *); 88 89 static int fcoe_fip_recv(struct sk_buff *, struct net_device *, 90 struct packet_type *, struct net_device *); 91 static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *, 92 struct packet_type *, struct net_device *); 93 94 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); 95 static void fcoe_update_src_mac(struct fc_lport *, u8 *); 96 static u8 *fcoe_get_src_mac(struct fc_lport *); 97 static void fcoe_destroy_work(struct work_struct *); 98 99 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, 100 unsigned int); 101 static int fcoe_ddp_done(struct fc_lport *, u16); 102 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *, 103 unsigned int); 104 static int fcoe_dcb_app_notification(struct notifier_block *notifier, 105 ulong event, void *ptr); 106 107 static bool fcoe_match(struct net_device *netdev); 108 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode); 109 static int fcoe_destroy(struct net_device *netdev); 110 static int fcoe_enable(struct net_device *netdev); 111 static int fcoe_disable(struct net_device *netdev); 112 113 /* fcoe_syfs control interface handlers */ 114 static int fcoe_ctlr_alloc(struct net_device *netdev); 115 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev); 116 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev); 117 118 static struct fc_seq *fcoe_elsct_send(struct fc_lport *, 119 u32 did, struct fc_frame *, 120 unsigned int op, 121 void (*resp)(struct fc_seq *, 122 struct fc_frame *, 123 void *), 124 void *, u32 timeout); 125 static void fcoe_recv_frame(struct sk_buff *skb); 126 127 /* notification function for packets from net device */ 128 static struct notifier_block fcoe_notifier = { 129 .notifier_call = fcoe_device_notification, 130 }; 131 132 /* notification function for DCB events */ 133 static struct notifier_block dcb_notifier = { 134 .notifier_call = fcoe_dcb_app_notification, 135 }; 136 137 static struct scsi_transport_template *fcoe_nport_scsi_transport; 138 static struct scsi_transport_template *fcoe_vport_scsi_transport; 139 140 static int fcoe_vport_destroy(struct fc_vport *); 141 static int fcoe_vport_create(struct fc_vport *, bool disabled); 142 static int fcoe_vport_disable(struct fc_vport *, bool disable); 143 static void fcoe_set_vport_symbolic_name(struct fc_vport *); 144 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); 145 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *); 146 static void fcoe_vport_remove(struct fc_lport *); 147 148 static struct fcoe_sysfs_function_template fcoe_sysfs_templ = { 149 .set_fcoe_ctlr_mode = fcoe_ctlr_mode, 150 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled, 151 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb, 152 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb, 153 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb, 154 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb, 155 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb, 156 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb, 157 158 .get_fcoe_fcf_selected = fcoe_fcf_get_selected, 159 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id, 160 }; 161 162 static struct libfc_function_template fcoe_libfc_fcn_templ = { 163 .frame_send = fcoe_xmit, 164 .ddp_setup = fcoe_ddp_setup, 165 .ddp_done = fcoe_ddp_done, 166 .ddp_target = fcoe_ddp_target, 167 .elsct_send = fcoe_elsct_send, 168 .get_lesb = fcoe_get_lesb, 169 .lport_set_port_id = fcoe_set_port_id, 170 }; 171 172 static struct fc_function_template fcoe_nport_fc_functions = { 173 .show_host_node_name = 1, 174 .show_host_port_name = 1, 175 .show_host_supported_classes = 1, 176 .show_host_supported_fc4s = 1, 177 .show_host_active_fc4s = 1, 178 .show_host_maxframe_size = 1, 179 .show_host_serial_number = 1, 180 .show_host_manufacturer = 1, 181 .show_host_model = 1, 182 .show_host_model_description = 1, 183 .show_host_hardware_version = 1, 184 .show_host_driver_version = 1, 185 .show_host_firmware_version = 1, 186 .show_host_optionrom_version = 1, 187 188 .show_host_port_id = 1, 189 .show_host_supported_speeds = 1, 190 .get_host_speed = fc_get_host_speed, 191 .show_host_speed = 1, 192 .show_host_port_type = 1, 193 .get_host_port_state = fc_get_host_port_state, 194 .show_host_port_state = 1, 195 .show_host_symbolic_name = 1, 196 197 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 198 .show_rport_maxframe_size = 1, 199 .show_rport_supported_classes = 1, 200 201 .show_host_fabric_name = 1, 202 .show_starget_node_name = 1, 203 .show_starget_port_name = 1, 204 .show_starget_port_id = 1, 205 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 206 .show_rport_dev_loss_tmo = 1, 207 .get_fc_host_stats = fc_get_host_stats, 208 .issue_fc_host_lip = fcoe_reset, 209 210 .terminate_rport_io = fc_rport_terminate_io, 211 212 .vport_create = fcoe_vport_create, 213 .vport_delete = fcoe_vport_destroy, 214 .vport_disable = fcoe_vport_disable, 215 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, 216 217 .bsg_request = fc_lport_bsg_request, 218 }; 219 220 static struct fc_function_template fcoe_vport_fc_functions = { 221 .show_host_node_name = 1, 222 .show_host_port_name = 1, 223 .show_host_supported_classes = 1, 224 .show_host_supported_fc4s = 1, 225 .show_host_active_fc4s = 1, 226 .show_host_maxframe_size = 1, 227 .show_host_serial_number = 1, 228 .show_host_manufacturer = 1, 229 .show_host_model = 1, 230 .show_host_model_description = 1, 231 .show_host_hardware_version = 1, 232 .show_host_driver_version = 1, 233 .show_host_firmware_version = 1, 234 .show_host_optionrom_version = 1, 235 236 .show_host_port_id = 1, 237 .show_host_supported_speeds = 1, 238 .get_host_speed = fc_get_host_speed, 239 .show_host_speed = 1, 240 .show_host_port_type = 1, 241 .get_host_port_state = fc_get_host_port_state, 242 .show_host_port_state = 1, 243 .show_host_symbolic_name = 1, 244 245 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 246 .show_rport_maxframe_size = 1, 247 .show_rport_supported_classes = 1, 248 249 .show_host_fabric_name = 1, 250 .show_starget_node_name = 1, 251 .show_starget_port_name = 1, 252 .show_starget_port_id = 1, 253 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 254 .show_rport_dev_loss_tmo = 1, 255 .get_fc_host_stats = fc_get_host_stats, 256 .issue_fc_host_lip = fcoe_reset, 257 258 .terminate_rport_io = fc_rport_terminate_io, 259 260 .bsg_request = fc_lport_bsg_request, 261 }; 262 263 static struct scsi_host_template fcoe_shost_template = { 264 .module = THIS_MODULE, 265 .name = "FCoE Driver", 266 .proc_name = FCOE_NAME, 267 .queuecommand = fc_queuecommand, 268 .eh_timed_out = fc_eh_timed_out, 269 .eh_abort_handler = fc_eh_abort, 270 .eh_device_reset_handler = fc_eh_device_reset, 271 .eh_host_reset_handler = fc_eh_host_reset, 272 .slave_alloc = fc_slave_alloc, 273 .change_queue_depth = scsi_change_queue_depth, 274 .this_id = -1, 275 .cmd_per_lun = 3, 276 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, 277 .sg_tablesize = SG_ALL, 278 .max_sectors = 0xffff, 279 .track_queue_depth = 1, 280 }; 281 282 /** 283 * fcoe_interface_setup() - Setup a FCoE interface 284 * @fcoe: The new FCoE interface 285 * @netdev: The net device that the fcoe interface is on 286 * 287 * Returns : 0 for success 288 * Locking: must be called with the RTNL mutex held 289 */ 290 static int fcoe_interface_setup(struct fcoe_interface *fcoe, 291 struct net_device *netdev) 292 { 293 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 294 struct netdev_hw_addr *ha; 295 struct net_device *real_dev; 296 u8 flogi_maddr[ETH_ALEN]; 297 const struct net_device_ops *ops; 298 299 fcoe->netdev = netdev; 300 301 /* Let LLD initialize for FCoE */ 302 ops = netdev->netdev_ops; 303 if (ops->ndo_fcoe_enable) { 304 if (ops->ndo_fcoe_enable(netdev)) 305 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" 306 " specific feature for LLD.\n"); 307 } 308 309 /* Do not support for bonding device */ 310 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) { 311 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); 312 return -EOPNOTSUPP; 313 } 314 315 /* look for SAN MAC address, if multiple SAN MACs exist, only 316 * use the first one for SPMA */ 317 real_dev = is_vlan_dev(netdev) ? vlan_dev_real_dev(netdev) : netdev; 318 fcoe->realdev = real_dev; 319 rcu_read_lock(); 320 for_each_dev_addr(real_dev, ha) { 321 if ((ha->type == NETDEV_HW_ADDR_T_SAN) && 322 (is_valid_ether_addr(ha->addr))) { 323 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); 324 fip->spma = 1; 325 break; 326 } 327 } 328 rcu_read_unlock(); 329 330 /* setup Source Mac Address */ 331 if (!fip->spma) 332 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); 333 334 /* 335 * Add FCoE MAC address as second unicast MAC address 336 * or enter promiscuous mode if not capable of listening 337 * for multiple unicast MACs. 338 */ 339 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 340 dev_uc_add(netdev, flogi_maddr); 341 if (fip->spma) 342 dev_uc_add(netdev, fip->ctl_src_addr); 343 if (fip->mode == FIP_MODE_VN2VN) { 344 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); 345 dev_mc_add(netdev, FIP_ALL_P2P_MACS); 346 } else 347 dev_mc_add(netdev, FIP_ALL_ENODE_MACS); 348 349 /* 350 * setup the receive function from ethernet driver 351 * on the ethertype for the given device 352 */ 353 fcoe->fcoe_packet_type.func = fcoe_rcv; 354 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE); 355 fcoe->fcoe_packet_type.dev = netdev; 356 dev_add_pack(&fcoe->fcoe_packet_type); 357 358 fcoe->fip_packet_type.func = fcoe_fip_recv; 359 fcoe->fip_packet_type.type = htons(ETH_P_FIP); 360 fcoe->fip_packet_type.dev = netdev; 361 dev_add_pack(&fcoe->fip_packet_type); 362 363 if (netdev != real_dev) { 364 fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv; 365 fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP); 366 fcoe->fip_vlan_packet_type.dev = real_dev; 367 dev_add_pack(&fcoe->fip_vlan_packet_type); 368 } 369 return 0; 370 } 371 372 /** 373 * fcoe_interface_create() - Create a FCoE interface on a net device 374 * @netdev: The net device to create the FCoE interface on 375 * @fip_mode: The mode to use for FIP 376 * 377 * Returns: pointer to a struct fcoe_interface or NULL on error 378 */ 379 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, 380 enum fip_mode fip_mode) 381 { 382 struct fcoe_ctlr_device *ctlr_dev; 383 struct fcoe_ctlr *ctlr; 384 struct fcoe_interface *fcoe; 385 int size; 386 int err; 387 388 if (!try_module_get(THIS_MODULE)) { 389 FCOE_NETDEV_DBG(netdev, 390 "Could not get a reference to the module\n"); 391 fcoe = ERR_PTR(-EBUSY); 392 goto out; 393 } 394 395 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface); 396 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ, 397 size); 398 if (!ctlr_dev) { 399 FCOE_DBG("Failed to add fcoe_ctlr_device\n"); 400 fcoe = ERR_PTR(-ENOMEM); 401 goto out_putmod; 402 } 403 404 ctlr = fcoe_ctlr_device_priv(ctlr_dev); 405 ctlr->cdev = ctlr_dev; 406 fcoe = fcoe_ctlr_priv(ctlr); 407 408 dev_hold(netdev); 409 410 /* 411 * Initialize FIP. 412 */ 413 fcoe_ctlr_init(ctlr, fip_mode); 414 ctlr->send = fcoe_fip_send; 415 ctlr->update_mac = fcoe_update_src_mac; 416 ctlr->get_src_addr = fcoe_get_src_mac; 417 418 err = fcoe_interface_setup(fcoe, netdev); 419 if (err) { 420 fcoe_ctlr_destroy(ctlr); 421 fcoe_ctlr_device_delete(ctlr_dev); 422 dev_put(netdev); 423 fcoe = ERR_PTR(err); 424 goto out_putmod; 425 } 426 427 goto out; 428 429 out_putmod: 430 module_put(THIS_MODULE); 431 out: 432 return fcoe; 433 } 434 435 /** 436 * fcoe_interface_remove() - remove FCoE interface from netdev 437 * @fcoe: The FCoE interface to be cleaned up 438 * 439 * Caller must be holding the RTNL mutex 440 */ 441 static void fcoe_interface_remove(struct fcoe_interface *fcoe) 442 { 443 struct net_device *netdev = fcoe->netdev; 444 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 445 u8 flogi_maddr[ETH_ALEN]; 446 const struct net_device_ops *ops; 447 448 /* 449 * Don't listen for Ethernet packets anymore. 450 * synchronize_net() ensures that the packet handlers are not running 451 * on another CPU. dev_remove_pack() would do that, this calls the 452 * unsyncronized version __dev_remove_pack() to avoid multiple delays. 453 */ 454 __dev_remove_pack(&fcoe->fcoe_packet_type); 455 __dev_remove_pack(&fcoe->fip_packet_type); 456 if (netdev != fcoe->realdev) 457 __dev_remove_pack(&fcoe->fip_vlan_packet_type); 458 synchronize_net(); 459 460 /* Delete secondary MAC addresses */ 461 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 462 dev_uc_del(netdev, flogi_maddr); 463 if (fip->spma) 464 dev_uc_del(netdev, fip->ctl_src_addr); 465 if (fip->mode == FIP_MODE_VN2VN) { 466 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); 467 dev_mc_del(netdev, FIP_ALL_P2P_MACS); 468 } else 469 dev_mc_del(netdev, FIP_ALL_ENODE_MACS); 470 471 /* Tell the LLD we are done w/ FCoE */ 472 ops = netdev->netdev_ops; 473 if (ops->ndo_fcoe_disable) { 474 if (ops->ndo_fcoe_disable(netdev)) 475 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" 476 " specific feature for LLD.\n"); 477 } 478 fcoe->removed = 1; 479 } 480 481 482 /** 483 * fcoe_interface_cleanup() - Clean up a FCoE interface 484 * @fcoe: The FCoE interface to be cleaned up 485 */ 486 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) 487 { 488 struct net_device *netdev = fcoe->netdev; 489 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 490 491 /* Release the self-reference taken during fcoe_interface_create() */ 492 /* tear-down the FCoE controller */ 493 fcoe_ctlr_destroy(fip); 494 scsi_host_put(fip->lp->host); 495 dev_put(netdev); 496 module_put(THIS_MODULE); 497 } 498 499 /** 500 * fcoe_fip_recv() - Handler for received FIP frames 501 * @skb: The receive skb 502 * @netdev: The associated net device 503 * @ptype: The packet_type structure which was used to register this handler 504 * @orig_dev: The original net_device the skb was received on. 505 * (in case dev is a bond) 506 * 507 * Returns: 0 for success 508 */ 509 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, 510 struct packet_type *ptype, 511 struct net_device *orig_dev) 512 { 513 struct fcoe_interface *fcoe; 514 struct fcoe_ctlr *ctlr; 515 516 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); 517 ctlr = fcoe_to_ctlr(fcoe); 518 fcoe_ctlr_recv(ctlr, skb); 519 return 0; 520 } 521 522 /** 523 * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames 524 * @skb: The receive skb 525 * @netdev: The associated net device 526 * @ptype: The packet_type structure which was used to register this handler 527 * @orig_dev: The original net_device the skb was received on. 528 * (in case dev is a bond) 529 * 530 * Returns: 0 for success 531 */ 532 static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev, 533 struct packet_type *ptype, 534 struct net_device *orig_dev) 535 { 536 struct fcoe_interface *fcoe; 537 struct fcoe_ctlr *ctlr; 538 539 fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type); 540 ctlr = fcoe_to_ctlr(fcoe); 541 fcoe_ctlr_recv(ctlr, skb); 542 return 0; 543 } 544 545 /** 546 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame 547 * @port: The FCoE port 548 * @skb: The FIP/FCoE packet to be sent 549 */ 550 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb) 551 { 552 if (port->fcoe_pending_queue.qlen) 553 fcoe_check_wait_queue(port->lport, skb); 554 else if (fcoe_start_io(skb)) 555 fcoe_check_wait_queue(port->lport, skb); 556 } 557 558 /** 559 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame 560 * @fip: The FCoE controller 561 * @skb: The FIP packet to be sent 562 */ 563 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 564 { 565 struct fcoe_interface *fcoe = fcoe_from_ctlr(fip); 566 struct fip_frame { 567 struct ethhdr eth; 568 struct fip_header fip; 569 } __packed *frame; 570 571 /* 572 * Use default VLAN for FIP VLAN discovery protocol 573 */ 574 frame = (struct fip_frame *)skb->data; 575 if (ntohs(frame->eth.h_proto) == ETH_P_FIP && 576 ntohs(frame->fip.fip_op) == FIP_OP_VLAN && 577 fcoe->realdev != fcoe->netdev) 578 skb->dev = fcoe->realdev; 579 else 580 skb->dev = fcoe->netdev; 581 fcoe_port_send(lport_priv(fip->lp), skb); 582 } 583 584 /** 585 * fcoe_update_src_mac() - Update the Ethernet MAC filters 586 * @lport: The local port to update the source MAC on 587 * @addr: Unicast MAC address to add 588 * 589 * Remove any previously-set unicast MAC filter. 590 * Add secondary FCoE MAC address filter for our OUI. 591 */ 592 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) 593 { 594 struct fcoe_port *port = lport_priv(lport); 595 struct fcoe_interface *fcoe = port->priv; 596 597 if (!is_zero_ether_addr(port->data_src_addr)) 598 dev_uc_del(fcoe->netdev, port->data_src_addr); 599 if (!is_zero_ether_addr(addr)) 600 dev_uc_add(fcoe->netdev, addr); 601 memcpy(port->data_src_addr, addr, ETH_ALEN); 602 } 603 604 /** 605 * fcoe_get_src_mac() - return the Ethernet source address for an lport 606 * @lport: libfc lport 607 */ 608 static u8 *fcoe_get_src_mac(struct fc_lport *lport) 609 { 610 struct fcoe_port *port = lport_priv(lport); 611 612 return port->data_src_addr; 613 } 614 615 /** 616 * fcoe_lport_config() - Set up a local port 617 * @lport: The local port to be setup 618 * 619 * Returns: 0 for success 620 */ 621 static int fcoe_lport_config(struct fc_lport *lport) 622 { 623 lport->link_up = 0; 624 lport->qfull = 0; 625 lport->max_retry_count = 3; 626 lport->max_rport_retry_count = 3; 627 lport->e_d_tov = fcoe_e_d_tov; 628 lport->r_a_tov = fcoe_r_a_tov; 629 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 630 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); 631 lport->does_npiv = 1; 632 633 fc_lport_init_stats(lport); 634 635 /* lport fc_lport related configuration */ 636 fc_lport_config(lport); 637 638 /* offload related configuration */ 639 lport->crc_offload = 0; 640 lport->seq_offload = 0; 641 lport->lro_enabled = 0; 642 lport->lro_xid = 0; 643 lport->lso_max = 0; 644 645 return 0; 646 } 647 648 /** 649 * fcoe_netdev_features_change - Updates the lport's offload flags based 650 * on the LLD netdev's FCoE feature flags 651 */ 652 static void fcoe_netdev_features_change(struct fc_lport *lport, 653 struct net_device *netdev) 654 { 655 mutex_lock(&lport->lp_mutex); 656 657 if (netdev->features & NETIF_F_SG) 658 lport->sg_supp = 1; 659 else 660 lport->sg_supp = 0; 661 662 if (netdev->features & NETIF_F_FCOE_CRC) { 663 lport->crc_offload = 1; 664 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); 665 } else { 666 lport->crc_offload = 0; 667 } 668 669 if (netdev->features & NETIF_F_FSO) { 670 lport->seq_offload = 1; 671 lport->lso_max = netdev->gso_max_size; 672 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", 673 lport->lso_max); 674 } else { 675 lport->seq_offload = 0; 676 lport->lso_max = 0; 677 } 678 679 if (netdev->fcoe_ddp_xid) { 680 lport->lro_enabled = 1; 681 lport->lro_xid = netdev->fcoe_ddp_xid; 682 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", 683 lport->lro_xid); 684 } else { 685 lport->lro_enabled = 0; 686 lport->lro_xid = 0; 687 } 688 689 mutex_unlock(&lport->lp_mutex); 690 } 691 692 /** 693 * fcoe_netdev_config() - Set up net devive for SW FCoE 694 * @lport: The local port that is associated with the net device 695 * @netdev: The associated net device 696 * 697 * Must be called after fcoe_lport_config() as it will use local port mutex 698 * 699 * Returns: 0 for success 700 */ 701 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) 702 { 703 u32 mfs; 704 u64 wwnn, wwpn; 705 struct fcoe_interface *fcoe; 706 struct fcoe_ctlr *ctlr; 707 struct fcoe_port *port; 708 709 /* Setup lport private data to point to fcoe softc */ 710 port = lport_priv(lport); 711 fcoe = port->priv; 712 ctlr = fcoe_to_ctlr(fcoe); 713 714 /* Figure out the VLAN ID, if any */ 715 if (is_vlan_dev(netdev)) 716 lport->vlan = vlan_dev_vlan_id(netdev); 717 else 718 lport->vlan = 0; 719 720 /* 721 * Determine max frame size based on underlying device and optional 722 * user-configured limit. If the MFS is too low, fcoe_link_ok() 723 * will return 0, so do this first. 724 */ 725 mfs = netdev->mtu; 726 if (netdev->features & NETIF_F_FCOE_MTU) { 727 mfs = FCOE_MTU; 728 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); 729 } 730 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); 731 if (fc_set_mfs(lport, mfs)) 732 return -EINVAL; 733 734 /* offload features support */ 735 fcoe_netdev_features_change(lport, netdev); 736 737 skb_queue_head_init(&port->fcoe_pending_queue); 738 port->fcoe_pending_queue_active = 0; 739 timer_setup(&port->timer, fcoe_queue_timer, 0); 740 741 fcoe_link_speed_update(lport); 742 743 if (!lport->vport) { 744 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) 745 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0); 746 fc_set_wwnn(lport, wwnn); 747 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) 748 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 749 2, 0); 750 fc_set_wwpn(lport, wwpn); 751 } 752 753 return 0; 754 } 755 756 /** 757 * fcoe_shost_config() - Set up the SCSI host associated with a local port 758 * @lport: The local port 759 * @dev: The device associated with the SCSI host 760 * 761 * Must be called after fcoe_lport_config() and fcoe_netdev_config() 762 * 763 * Returns: 0 for success 764 */ 765 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) 766 { 767 int rc = 0; 768 769 /* lport scsi host config */ 770 lport->host->max_lun = FCOE_MAX_LUN; 771 lport->host->max_id = FCOE_MAX_FCP_TARGET; 772 lport->host->max_channel = 0; 773 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; 774 775 if (lport->vport) 776 lport->host->transportt = fcoe_vport_scsi_transport; 777 else 778 lport->host->transportt = fcoe_nport_scsi_transport; 779 780 /* add the new host to the SCSI-ml */ 781 rc = scsi_add_host(lport->host, dev); 782 if (rc) { 783 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " 784 "error on scsi_add_host\n"); 785 return rc; 786 } 787 788 if (!lport->vport) 789 fc_host_max_npiv_vports(lport->host) = USHRT_MAX; 790 791 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 792 "%s v%s over %s", FCOE_NAME, FCOE_VERSION, 793 fcoe_netdev(lport)->name); 794 795 return 0; 796 } 797 798 799 /** 800 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE 801 * @lport: The local port that is associated with the net device 802 * @netdev: The associated net device 803 * 804 * Must be called after fcoe_shost_config() as it will use local port mutex 805 * 806 */ 807 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev) 808 { 809 struct fcoe_interface *fcoe; 810 struct fcoe_port *port; 811 struct net_device *realdev; 812 int rc; 813 814 port = lport_priv(lport); 815 fcoe = port->priv; 816 realdev = fcoe->realdev; 817 818 /* No FDMI state m/c for NPIV ports */ 819 if (lport->vport) 820 return; 821 822 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) { 823 struct netdev_fcoe_hbainfo *fdmi; 824 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL); 825 if (!fdmi) 826 return; 827 828 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev, 829 fdmi); 830 if (rc) { 831 printk(KERN_INFO "fcoe: Failed to retrieve FDMI " 832 "information from netdev.\n"); 833 return; 834 } 835 836 snprintf(fc_host_serial_number(lport->host), 837 FC_SERIAL_NUMBER_SIZE, 838 "%s", 839 fdmi->serial_number); 840 snprintf(fc_host_manufacturer(lport->host), 841 FC_SERIAL_NUMBER_SIZE, 842 "%s", 843 fdmi->manufacturer); 844 snprintf(fc_host_model(lport->host), 845 FC_SYMBOLIC_NAME_SIZE, 846 "%s", 847 fdmi->model); 848 snprintf(fc_host_model_description(lport->host), 849 FC_SYMBOLIC_NAME_SIZE, 850 "%s", 851 fdmi->model_description); 852 snprintf(fc_host_hardware_version(lport->host), 853 FC_VERSION_STRING_SIZE, 854 "%s", 855 fdmi->hardware_version); 856 snprintf(fc_host_driver_version(lport->host), 857 FC_VERSION_STRING_SIZE, 858 "%s", 859 fdmi->driver_version); 860 snprintf(fc_host_optionrom_version(lport->host), 861 FC_VERSION_STRING_SIZE, 862 "%s", 863 fdmi->optionrom_version); 864 snprintf(fc_host_firmware_version(lport->host), 865 FC_VERSION_STRING_SIZE, 866 "%s", 867 fdmi->firmware_version); 868 869 /* Enable FDMI lport states */ 870 lport->fdmi_enabled = 1; 871 kfree(fdmi); 872 } else { 873 lport->fdmi_enabled = 0; 874 printk(KERN_INFO "fcoe: No FDMI support.\n"); 875 } 876 } 877 878 /** 879 * fcoe_oem_match() - The match routine for the offloaded exchange manager 880 * @fp: The I/O frame 881 * 882 * This routine will be associated with an exchange manager (EM). When 883 * the libfc exchange handling code is looking for an EM to use it will 884 * call this routine and pass it the frame that it wishes to send. This 885 * routine will return True if the associated EM is to be used and False 886 * if the echange code should continue looking for an EM. 887 * 888 * The offload EM that this routine is associated with will handle any 889 * packets that are for SCSI read requests. 890 * 891 * This has been enhanced to work when FCoE stack is operating in target 892 * mode. 893 * 894 * Returns: True for read types I/O, otherwise returns false. 895 */ 896 static bool fcoe_oem_match(struct fc_frame *fp) 897 { 898 struct fc_frame_header *fh = fc_frame_header_get(fp); 899 struct fcp_cmnd *fcp; 900 901 if (fc_fcp_is_read(fr_fsp(fp)) && 902 (fr_fsp(fp)->data_len > fcoe_ddp_min)) 903 return true; 904 else if ((fr_fsp(fp) == NULL) && 905 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) && 906 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) { 907 fcp = fc_frame_payload_get(fp, sizeof(*fcp)); 908 if ((fcp->fc_flags & FCP_CFL_WRDATA) && 909 (ntohl(fcp->fc_dl) > fcoe_ddp_min)) 910 return true; 911 } 912 return false; 913 } 914 915 /** 916 * fcoe_em_config() - Allocate and configure an exchange manager 917 * @lport: The local port that the new EM will be associated with 918 * 919 * Returns: 0 on success 920 */ 921 static inline int fcoe_em_config(struct fc_lport *lport) 922 { 923 struct fcoe_port *port = lport_priv(lport); 924 struct fcoe_interface *fcoe = port->priv; 925 struct fcoe_interface *oldfcoe = NULL; 926 struct net_device *old_real_dev, *cur_real_dev; 927 u16 min_xid = FCOE_MIN_XID; 928 u16 max_xid = FCOE_MAX_XID; 929 930 /* 931 * Check if need to allocate an em instance for 932 * offload exchange ids to be shared across all VN_PORTs/lport. 933 */ 934 if (!lport->lro_enabled || !lport->lro_xid || 935 (lport->lro_xid >= max_xid)) { 936 lport->lro_xid = 0; 937 goto skip_oem; 938 } 939 940 /* 941 * Reuse existing offload em instance in case 942 * it is already allocated on real eth device 943 */ 944 if (is_vlan_dev(fcoe->netdev)) 945 cur_real_dev = vlan_dev_real_dev(fcoe->netdev); 946 else 947 cur_real_dev = fcoe->netdev; 948 949 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { 950 if (is_vlan_dev(oldfcoe->netdev)) 951 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); 952 else 953 old_real_dev = oldfcoe->netdev; 954 955 if (cur_real_dev == old_real_dev) { 956 fcoe->oem = oldfcoe->oem; 957 break; 958 } 959 } 960 961 if (fcoe->oem) { 962 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { 963 printk(KERN_ERR "fcoe_em_config: failed to add " 964 "offload em:%p on interface:%s\n", 965 fcoe->oem, fcoe->netdev->name); 966 return -ENOMEM; 967 } 968 } else { 969 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, 970 FCOE_MIN_XID, lport->lro_xid, 971 fcoe_oem_match); 972 if (!fcoe->oem) { 973 printk(KERN_ERR "fcoe_em_config: failed to allocate " 974 "em for offload exches on interface:%s\n", 975 fcoe->netdev->name); 976 return -ENOMEM; 977 } 978 } 979 980 /* 981 * Exclude offload EM xid range from next EM xid range. 982 */ 983 min_xid += lport->lro_xid + 1; 984 985 skip_oem: 986 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { 987 printk(KERN_ERR "fcoe_em_config: failed to " 988 "allocate em on interface %s\n", fcoe->netdev->name); 989 return -ENOMEM; 990 } 991 992 return 0; 993 } 994 995 /** 996 * fcoe_if_destroy() - Tear down a SW FCoE instance 997 * @lport: The local port to be destroyed 998 * 999 * Locking: Must be called with the RTNL mutex held. 1000 * 1001 */ 1002 static void fcoe_if_destroy(struct fc_lport *lport) 1003 { 1004 struct fcoe_port *port = lport_priv(lport); 1005 struct fcoe_interface *fcoe = port->priv; 1006 struct net_device *netdev = fcoe->netdev; 1007 1008 FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); 1009 1010 /* Logout of the fabric */ 1011 fc_fabric_logoff(lport); 1012 1013 /* Cleanup the fc_lport */ 1014 fc_lport_destroy(lport); 1015 1016 /* Stop the transmit retry timer */ 1017 del_timer_sync(&port->timer); 1018 1019 /* Free existing transmit skbs */ 1020 fcoe_clean_pending_queue(lport); 1021 1022 if (!is_zero_ether_addr(port->data_src_addr)) 1023 dev_uc_del(netdev, port->data_src_addr); 1024 if (lport->vport) 1025 synchronize_net(); 1026 else 1027 fcoe_interface_remove(fcoe); 1028 1029 /* Free queued packets for the per-CPU receive threads */ 1030 fcoe_percpu_clean(lport); 1031 1032 /* Detach from the scsi-ml */ 1033 fc_remove_host(lport->host); 1034 scsi_remove_host(lport->host); 1035 1036 /* Destroy lport scsi_priv */ 1037 fc_fcp_destroy(lport); 1038 1039 /* There are no more rports or I/O, free the EM */ 1040 fc_exch_mgr_free(lport); 1041 1042 /* Free memory used by statistical counters */ 1043 fc_lport_free_stats(lport); 1044 1045 /* 1046 * Release the Scsi_Host for vport but hold on to 1047 * master lport until it fcoe interface fully cleaned-up. 1048 */ 1049 if (lport->vport) 1050 scsi_host_put(lport->host); 1051 } 1052 1053 /** 1054 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device 1055 * @lport: The local port to setup DDP for 1056 * @xid: The exchange ID for this DDP transfer 1057 * @sgl: The scatterlist describing this transfer 1058 * @sgc: The number of sg items 1059 * 1060 * Returns: 0 if the DDP context was not configured 1061 */ 1062 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, 1063 struct scatterlist *sgl, unsigned int sgc) 1064 { 1065 struct net_device *netdev = fcoe_netdev(lport); 1066 1067 if (netdev->netdev_ops->ndo_fcoe_ddp_setup) 1068 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, 1069 xid, sgl, 1070 sgc); 1071 1072 return 0; 1073 } 1074 1075 /** 1076 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device 1077 * @lport: The local port to setup DDP for 1078 * @xid: The exchange ID for this DDP transfer 1079 * @sgl: The scatterlist describing this transfer 1080 * @sgc: The number of sg items 1081 * 1082 * Returns: 0 if the DDP context was not configured 1083 */ 1084 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, 1085 struct scatterlist *sgl, unsigned int sgc) 1086 { 1087 struct net_device *netdev = fcoe_netdev(lport); 1088 1089 if (netdev->netdev_ops->ndo_fcoe_ddp_target) 1090 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, 1091 sgl, sgc); 1092 1093 return 0; 1094 } 1095 1096 1097 /** 1098 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device 1099 * @lport: The local port to complete DDP on 1100 * @xid: The exchange ID for this DDP transfer 1101 * 1102 * Returns: the length of data that have been completed by DDP 1103 */ 1104 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) 1105 { 1106 struct net_device *netdev = fcoe_netdev(lport); 1107 1108 if (netdev->netdev_ops->ndo_fcoe_ddp_done) 1109 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); 1110 return 0; 1111 } 1112 1113 /** 1114 * fcoe_if_create() - Create a FCoE instance on an interface 1115 * @fcoe: The FCoE interface to create a local port on 1116 * @parent: The device pointer to be the parent in sysfs for the SCSI host 1117 * @npiv: Indicates if the port is a vport or not 1118 * 1119 * Creates a fc_lport instance and a Scsi_Host instance and configure them. 1120 * 1121 * Returns: The allocated fc_lport or an error pointer 1122 */ 1123 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, 1124 struct device *parent, int npiv) 1125 { 1126 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1127 struct net_device *netdev = fcoe->netdev; 1128 struct fc_lport *lport, *n_port; 1129 struct fcoe_port *port; 1130 struct Scsi_Host *shost; 1131 int rc; 1132 /* 1133 * parent is only a vport if npiv is 1, 1134 * but we'll only use vport in that case so go ahead and set it 1135 */ 1136 struct fc_vport *vport = dev_to_vport(parent); 1137 1138 FCOE_NETDEV_DBG(netdev, "Create Interface\n"); 1139 1140 if (!npiv) 1141 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); 1142 else 1143 lport = libfc_vport_create(vport, sizeof(*port)); 1144 1145 if (!lport) { 1146 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); 1147 rc = -ENOMEM; 1148 goto out; 1149 } 1150 port = lport_priv(lport); 1151 port->lport = lport; 1152 port->priv = fcoe; 1153 port->get_netdev = fcoe_netdev; 1154 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; 1155 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; 1156 INIT_WORK(&port->destroy_work, fcoe_destroy_work); 1157 1158 /* 1159 * Need to add the lport to the hostlist 1160 * so we catch NETDEV_CHANGE events. 1161 */ 1162 fcoe_hostlist_add(lport); 1163 1164 /* configure a fc_lport including the exchange manager */ 1165 rc = fcoe_lport_config(lport); 1166 if (rc) { 1167 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " 1168 "interface\n"); 1169 goto out_host_put; 1170 } 1171 1172 if (npiv) { 1173 FCOE_NETDEV_DBG(netdev, "Setting vport names, " 1174 "%16.16llx %16.16llx\n", 1175 vport->node_name, vport->port_name); 1176 fc_set_wwnn(lport, vport->node_name); 1177 fc_set_wwpn(lport, vport->port_name); 1178 } 1179 1180 /* configure lport network properties */ 1181 rc = fcoe_netdev_config(lport, netdev); 1182 if (rc) { 1183 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " 1184 "interface\n"); 1185 goto out_lp_destroy; 1186 } 1187 1188 /* configure lport scsi host properties */ 1189 rc = fcoe_shost_config(lport, parent); 1190 if (rc) { 1191 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " 1192 "interface\n"); 1193 goto out_lp_destroy; 1194 } 1195 1196 /* Initialize the library */ 1197 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1); 1198 if (rc) { 1199 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " 1200 "interface\n"); 1201 goto out_lp_destroy; 1202 } 1203 1204 /* Initialized FDMI information */ 1205 fcoe_fdmi_info(lport, netdev); 1206 1207 /* 1208 * fcoe_em_alloc() and fcoe_hostlist_add() both 1209 * need to be atomic with respect to other changes to the 1210 * hostlist since fcoe_em_alloc() looks for an existing EM 1211 * instance on host list updated by fcoe_hostlist_add(). 1212 * 1213 * This is currently handled through the fcoe_config_mutex 1214 * begin held. 1215 */ 1216 if (!npiv) 1217 /* lport exch manager allocation */ 1218 rc = fcoe_em_config(lport); 1219 else { 1220 shost = vport_to_shost(vport); 1221 n_port = shost_priv(shost); 1222 rc = fc_exch_mgr_list_clone(n_port, lport); 1223 } 1224 1225 if (rc) { 1226 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); 1227 goto out_lp_destroy; 1228 } 1229 1230 return lport; 1231 1232 out_lp_destroy: 1233 fc_exch_mgr_free(lport); 1234 out_host_put: 1235 fcoe_hostlist_del(lport); 1236 scsi_host_put(lport->host); 1237 out: 1238 return ERR_PTR(rc); 1239 } 1240 1241 /** 1242 * fcoe_if_init() - Initialization routine for fcoe.ko 1243 * 1244 * Attaches the SW FCoE transport to the FC transport 1245 * 1246 * Returns: 0 on success 1247 */ 1248 static int __init fcoe_if_init(void) 1249 { 1250 /* attach to scsi transport */ 1251 fcoe_nport_scsi_transport = 1252 fc_attach_transport(&fcoe_nport_fc_functions); 1253 if (!fcoe_nport_scsi_transport) 1254 goto err; 1255 1256 fcoe_vport_scsi_transport = 1257 fc_attach_transport(&fcoe_vport_fc_functions); 1258 if (!fcoe_vport_scsi_transport) 1259 goto err_vport; 1260 1261 return 0; 1262 1263 err_vport: 1264 fc_release_transport(fcoe_nport_scsi_transport); 1265 err: 1266 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); 1267 return -ENODEV; 1268 } 1269 1270 /** 1271 * fcoe_if_exit() - Tear down fcoe.ko 1272 * 1273 * Detaches the SW FCoE transport from the FC transport 1274 * 1275 * Returns: 0 on success 1276 */ 1277 static int __exit fcoe_if_exit(void) 1278 { 1279 fc_release_transport(fcoe_nport_scsi_transport); 1280 fc_release_transport(fcoe_vport_scsi_transport); 1281 fcoe_nport_scsi_transport = NULL; 1282 fcoe_vport_scsi_transport = NULL; 1283 return 0; 1284 } 1285 1286 static void fcoe_thread_cleanup_local(unsigned int cpu) 1287 { 1288 struct page *crc_eof; 1289 struct fcoe_percpu_s *p; 1290 1291 p = per_cpu_ptr(&fcoe_percpu, cpu); 1292 spin_lock_bh(&p->fcoe_rx_list.lock); 1293 crc_eof = p->crc_eof_page; 1294 p->crc_eof_page = NULL; 1295 p->crc_eof_offset = 0; 1296 spin_unlock_bh(&p->fcoe_rx_list.lock); 1297 1298 if (crc_eof) 1299 put_page(crc_eof); 1300 flush_work(&p->work); 1301 } 1302 1303 /** 1304 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming 1305 * command. 1306 * 1307 * This routine selects next CPU based on cpumask to distribute 1308 * incoming requests in round robin. 1309 * 1310 * Returns: int CPU number 1311 */ 1312 static inline unsigned int fcoe_select_cpu(void) 1313 { 1314 static unsigned int selected_cpu; 1315 1316 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask); 1317 if (selected_cpu >= nr_cpu_ids) 1318 selected_cpu = cpumask_first(cpu_online_mask); 1319 1320 return selected_cpu; 1321 } 1322 1323 /** 1324 * fcoe_rcv() - Receive packets from a net device 1325 * @skb: The received packet 1326 * @netdev: The net device that the packet was received on 1327 * @ptype: The packet type context 1328 * @olddev: The last device net device 1329 * 1330 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a 1331 * FC frame and passes the frame to libfc. 1332 * 1333 * Returns: 0 for success 1334 */ 1335 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, 1336 struct packet_type *ptype, struct net_device *olddev) 1337 { 1338 struct fc_lport *lport; 1339 struct fcoe_rcv_info *fr; 1340 struct fcoe_ctlr *ctlr; 1341 struct fcoe_interface *fcoe; 1342 struct fc_frame_header *fh; 1343 struct fcoe_percpu_s *fps; 1344 struct ethhdr *eh; 1345 unsigned int cpu; 1346 1347 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); 1348 ctlr = fcoe_to_ctlr(fcoe); 1349 lport = ctlr->lp; 1350 if (unlikely(!lport)) { 1351 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n"); 1352 goto err2; 1353 } 1354 if (!lport->link_up) 1355 goto err2; 1356 1357 FCOE_NETDEV_DBG(netdev, 1358 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1359 skb->len, skb->data_len, skb->head, skb->data, 1360 skb_tail_pointer(skb), skb_end_pointer(skb), 1361 skb->csum, skb->dev ? skb->dev->name : "<NULL>"); 1362 1363 1364 skb = skb_share_check(skb, GFP_ATOMIC); 1365 1366 if (skb == NULL) 1367 return NET_RX_DROP; 1368 1369 eh = eth_hdr(skb); 1370 1371 if (is_fip_mode(ctlr) && 1372 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) { 1373 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", 1374 eh->h_source); 1375 goto err; 1376 } 1377 1378 /* 1379 * Check for minimum frame length, and make sure required FCoE 1380 * and FC headers are pulled into the linear data area. 1381 */ 1382 if (unlikely((skb->len < FCOE_MIN_FRAME) || 1383 !pskb_may_pull(skb, FCOE_HEADER_LEN))) 1384 goto err; 1385 1386 skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); 1387 fh = (struct fc_frame_header *) skb_transport_header(skb); 1388 1389 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { 1390 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", 1391 eh->h_dest); 1392 goto err; 1393 } 1394 1395 fr = fcoe_dev_from_skb(skb); 1396 fr->fr_dev = lport; 1397 1398 /* 1399 * In case the incoming frame's exchange is originated from 1400 * the initiator, then received frame's exchange id is ANDed 1401 * with fc_cpu_mask bits to get the same cpu on which exchange 1402 * was originated, otherwise select cpu using rx exchange id 1403 * or fcoe_select_cpu(). 1404 */ 1405 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) 1406 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; 1407 else { 1408 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN) 1409 cpu = fcoe_select_cpu(); 1410 else 1411 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; 1412 } 1413 1414 if (cpu >= nr_cpu_ids) 1415 goto err; 1416 1417 fps = &per_cpu(fcoe_percpu, cpu); 1418 spin_lock(&fps->fcoe_rx_list.lock); 1419 /* 1420 * We now have a valid CPU that we're targeting for 1421 * this skb. We also have this receive thread locked, 1422 * so we're free to queue skbs into it's queue. 1423 */ 1424 1425 /* 1426 * Note: We used to have a set of conditions under which we would 1427 * call fcoe_recv_frame directly, rather than queuing to the rx list 1428 * as it could save a few cycles, but doing so is prohibited, as 1429 * fcoe_recv_frame has several paths that may sleep, which is forbidden 1430 * in softirq context. 1431 */ 1432 __skb_queue_tail(&fps->fcoe_rx_list, skb); 1433 schedule_work_on(cpu, &fps->work); 1434 spin_unlock(&fps->fcoe_rx_list.lock); 1435 1436 return NET_RX_SUCCESS; 1437 err: 1438 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++; 1439 put_cpu(); 1440 err2: 1441 kfree_skb(skb); 1442 return NET_RX_DROP; 1443 } 1444 1445 /** 1446 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC 1447 * @skb: The packet to be transmitted 1448 * @tlen: The total length of the trailer 1449 * 1450 * Returns: 0 for success 1451 */ 1452 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) 1453 { 1454 struct fcoe_percpu_s *fps; 1455 int rc; 1456 1457 fps = &get_cpu_var(fcoe_percpu); 1458 rc = fcoe_get_paged_crc_eof(skb, tlen, fps); 1459 put_cpu_var(fcoe_percpu); 1460 1461 return rc; 1462 } 1463 1464 /** 1465 * fcoe_xmit() - Transmit a FCoE frame 1466 * @lport: The local port that the frame is to be transmitted for 1467 * @fp: The frame to be transmitted 1468 * 1469 * Return: 0 for success 1470 */ 1471 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) 1472 { 1473 int wlen; 1474 u32 crc; 1475 struct ethhdr *eh; 1476 struct fcoe_crc_eof *cp; 1477 struct sk_buff *skb; 1478 struct fc_stats *stats; 1479 struct fc_frame_header *fh; 1480 unsigned int hlen; /* header length implies the version */ 1481 unsigned int tlen; /* trailer length */ 1482 unsigned int elen; /* eth header, may include vlan */ 1483 struct fcoe_port *port = lport_priv(lport); 1484 struct fcoe_interface *fcoe = port->priv; 1485 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1486 u8 sof, eof; 1487 struct fcoe_hdr *hp; 1488 1489 WARN_ON((fr_len(fp) % sizeof(u32)) != 0); 1490 1491 fh = fc_frame_header_get(fp); 1492 skb = fp_skb(fp); 1493 wlen = skb->len / FCOE_WORD_TO_BYTE; 1494 1495 if (!lport->link_up) { 1496 kfree_skb(skb); 1497 return 0; 1498 } 1499 1500 if (unlikely(fh->fh_type == FC_TYPE_ELS) && 1501 fcoe_ctlr_els_send(ctlr, lport, skb)) 1502 return 0; 1503 1504 sof = fr_sof(fp); 1505 eof = fr_eof(fp); 1506 1507 elen = sizeof(struct ethhdr); 1508 hlen = sizeof(struct fcoe_hdr); 1509 tlen = sizeof(struct fcoe_crc_eof); 1510 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; 1511 1512 /* crc offload */ 1513 if (likely(lport->crc_offload)) { 1514 skb->ip_summed = CHECKSUM_PARTIAL; 1515 skb->csum_start = skb_headroom(skb); 1516 skb->csum_offset = skb->len; 1517 crc = 0; 1518 } else { 1519 skb->ip_summed = CHECKSUM_NONE; 1520 crc = fcoe_fc_crc(fp); 1521 } 1522 1523 /* copy port crc and eof to the skb buff */ 1524 if (skb_is_nonlinear(skb)) { 1525 skb_frag_t *frag; 1526 if (fcoe_alloc_paged_crc_eof(skb, tlen)) { 1527 kfree_skb(skb); 1528 return -ENOMEM; 1529 } 1530 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; 1531 cp = kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag); 1532 } else { 1533 cp = skb_put(skb, tlen); 1534 } 1535 1536 memset(cp, 0, sizeof(*cp)); 1537 cp->fcoe_eof = eof; 1538 cp->fcoe_crc32 = cpu_to_le32(~crc); 1539 1540 if (skb_is_nonlinear(skb)) { 1541 kunmap_atomic(cp); 1542 cp = NULL; 1543 } 1544 1545 /* adjust skb network/transport offsets to match mac/fcoe/port */ 1546 skb_push(skb, elen + hlen); 1547 skb_reset_mac_header(skb); 1548 skb_reset_network_header(skb); 1549 skb->mac_len = elen; 1550 skb->protocol = htons(ETH_P_FCOE); 1551 skb->priority = fcoe->priority; 1552 1553 if (is_vlan_dev(fcoe->netdev) && 1554 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) { 1555 /* must set skb->dev before calling vlan_put_tag */ 1556 skb->dev = fcoe->realdev; 1557 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1558 vlan_dev_vlan_id(fcoe->netdev)); 1559 } else 1560 skb->dev = fcoe->netdev; 1561 1562 /* fill up mac and fcoe headers */ 1563 eh = eth_hdr(skb); 1564 eh->h_proto = htons(ETH_P_FCOE); 1565 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN); 1566 if (ctlr->map_dest) 1567 memcpy(eh->h_dest + 3, fh->fh_d_id, 3); 1568 1569 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN)) 1570 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN); 1571 else 1572 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); 1573 1574 hp = (struct fcoe_hdr *)(eh + 1); 1575 memset(hp, 0, sizeof(*hp)); 1576 if (FC_FCOE_VER) 1577 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); 1578 hp->fcoe_sof = sof; 1579 1580 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ 1581 if (lport->seq_offload && fr_max_payload(fp)) { 1582 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; 1583 skb_shinfo(skb)->gso_size = fr_max_payload(fp); 1584 } else { 1585 skb_shinfo(skb)->gso_type = 0; 1586 skb_shinfo(skb)->gso_size = 0; 1587 } 1588 /* update tx stats: regardless if LLD fails */ 1589 stats = per_cpu_ptr(lport->stats, get_cpu()); 1590 stats->TxFrames++; 1591 stats->TxWords += wlen; 1592 put_cpu(); 1593 1594 /* send down to lld */ 1595 fr_dev(fp) = lport; 1596 fcoe_port_send(port, skb); 1597 return 0; 1598 } 1599 1600 /** 1601 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC 1602 * @lport: The local port the frame was received on 1603 * @fp: The received frame 1604 * 1605 * Return: 0 on passing filtering checks 1606 */ 1607 static inline int fcoe_filter_frames(struct fc_lport *lport, 1608 struct fc_frame *fp) 1609 { 1610 struct fcoe_ctlr *ctlr; 1611 struct fcoe_interface *fcoe; 1612 struct fc_frame_header *fh; 1613 struct sk_buff *skb = (struct sk_buff *)fp; 1614 struct fc_stats *stats; 1615 1616 /* 1617 * We only check CRC if no offload is available and if it is 1618 * it's solicited data, in which case, the FCP layer would 1619 * check it during the copy. 1620 */ 1621 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) 1622 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1623 else 1624 fr_flags(fp) |= FCPHF_CRC_UNCHECKED; 1625 1626 fh = fc_frame_header_get(fp); 1627 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) 1628 return 0; 1629 1630 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; 1631 ctlr = fcoe_to_ctlr(fcoe); 1632 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && 1633 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { 1634 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); 1635 return -EINVAL; 1636 } 1637 1638 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || 1639 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { 1640 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1641 return 0; 1642 } 1643 1644 stats = per_cpu_ptr(lport->stats, get_cpu()); 1645 stats->InvalidCRCCount++; 1646 if (stats->InvalidCRCCount < 5) 1647 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); 1648 put_cpu(); 1649 return -EINVAL; 1650 } 1651 1652 /** 1653 * fcoe_recv_frame() - process a single received frame 1654 * @skb: frame to process 1655 */ 1656 static void fcoe_recv_frame(struct sk_buff *skb) 1657 { 1658 u32 fr_len; 1659 struct fc_lport *lport; 1660 struct fcoe_rcv_info *fr; 1661 struct fc_stats *stats; 1662 struct fcoe_crc_eof crc_eof; 1663 struct fc_frame *fp; 1664 struct fcoe_hdr *hp; 1665 1666 fr = fcoe_dev_from_skb(skb); 1667 lport = fr->fr_dev; 1668 if (unlikely(!lport)) { 1669 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n"); 1670 kfree_skb(skb); 1671 return; 1672 } 1673 1674 FCOE_NETDEV_DBG(skb->dev, 1675 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1676 skb->len, skb->data_len, 1677 skb->head, skb->data, skb_tail_pointer(skb), 1678 skb_end_pointer(skb), skb->csum, 1679 skb->dev ? skb->dev->name : "<NULL>"); 1680 1681 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ 1682 1683 /* 1684 * Frame length checks and setting up the header pointers 1685 * was done in fcoe_rcv already. 1686 */ 1687 hp = (struct fcoe_hdr *) skb_network_header(skb); 1688 1689 stats = per_cpu_ptr(lport->stats, get_cpu()); 1690 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { 1691 if (stats->ErrorFrames < 5) 1692 printk(KERN_WARNING "fcoe: FCoE version " 1693 "mismatch: The frame has " 1694 "version %x, but the " 1695 "initiator supports version " 1696 "%x\n", FC_FCOE_DECAPS_VER(hp), 1697 FC_FCOE_VER); 1698 goto drop; 1699 } 1700 1701 skb_pull(skb, sizeof(struct fcoe_hdr)); 1702 fr_len = skb->len - sizeof(struct fcoe_crc_eof); 1703 1704 stats->RxFrames++; 1705 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; 1706 1707 fp = (struct fc_frame *)skb; 1708 fc_frame_init(fp); 1709 fr_dev(fp) = lport; 1710 fr_sof(fp) = hp->fcoe_sof; 1711 1712 /* Copy out the CRC and EOF trailer for access */ 1713 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) 1714 goto drop; 1715 fr_eof(fp) = crc_eof.fcoe_eof; 1716 fr_crc(fp) = crc_eof.fcoe_crc32; 1717 if (pskb_trim(skb, fr_len)) 1718 goto drop; 1719 1720 if (!fcoe_filter_frames(lport, fp)) { 1721 put_cpu(); 1722 fc_exch_recv(lport, fp); 1723 return; 1724 } 1725 drop: 1726 stats->ErrorFrames++; 1727 put_cpu(); 1728 kfree_skb(skb); 1729 } 1730 1731 /** 1732 * fcoe_receive_work() - The per-CPU worker 1733 * @work: The work struct 1734 * 1735 */ 1736 static void fcoe_receive_work(struct work_struct *work) 1737 { 1738 struct fcoe_percpu_s *p; 1739 struct sk_buff *skb; 1740 struct sk_buff_head tmp; 1741 1742 p = container_of(work, struct fcoe_percpu_s, work); 1743 skb_queue_head_init(&tmp); 1744 1745 spin_lock_bh(&p->fcoe_rx_list.lock); 1746 skb_queue_splice_init(&p->fcoe_rx_list, &tmp); 1747 spin_unlock_bh(&p->fcoe_rx_list.lock); 1748 1749 if (!skb_queue_len(&tmp)) 1750 return; 1751 1752 while ((skb = __skb_dequeue(&tmp))) 1753 fcoe_recv_frame(skb); 1754 } 1755 1756 /** 1757 * fcoe_dev_setup() - Setup the link change notification interface 1758 */ 1759 static void fcoe_dev_setup(void) 1760 { 1761 register_dcbevent_notifier(&dcb_notifier); 1762 register_netdevice_notifier(&fcoe_notifier); 1763 } 1764 1765 /** 1766 * fcoe_dev_cleanup() - Cleanup the link change notification interface 1767 */ 1768 static void fcoe_dev_cleanup(void) 1769 { 1770 unregister_dcbevent_notifier(&dcb_notifier); 1771 unregister_netdevice_notifier(&fcoe_notifier); 1772 } 1773 1774 static struct fcoe_interface * 1775 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev) 1776 { 1777 struct fcoe_interface *fcoe; 1778 struct net_device *real_dev; 1779 1780 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1781 if (is_vlan_dev(fcoe->netdev)) 1782 real_dev = vlan_dev_real_dev(fcoe->netdev); 1783 else 1784 real_dev = fcoe->netdev; 1785 1786 if (netdev == real_dev) 1787 return fcoe; 1788 } 1789 return NULL; 1790 } 1791 1792 static int fcoe_dcb_app_notification(struct notifier_block *notifier, 1793 ulong event, void *ptr) 1794 { 1795 struct dcb_app_type *entry = ptr; 1796 struct fcoe_ctlr *ctlr; 1797 struct fcoe_interface *fcoe; 1798 struct net_device *netdev; 1799 int prio; 1800 1801 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE) 1802 return NOTIFY_OK; 1803 1804 netdev = dev_get_by_index(&init_net, entry->ifindex); 1805 if (!netdev) 1806 return NOTIFY_OK; 1807 1808 fcoe = fcoe_hostlist_lookup_realdev_port(netdev); 1809 dev_put(netdev); 1810 if (!fcoe) 1811 return NOTIFY_OK; 1812 1813 ctlr = fcoe_to_ctlr(fcoe); 1814 1815 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE) 1816 prio = ffs(entry->app.priority) - 1; 1817 else 1818 prio = entry->app.priority; 1819 1820 if (prio < 0) 1821 return NOTIFY_OK; 1822 1823 if (entry->app.protocol == ETH_P_FIP || 1824 entry->app.protocol == ETH_P_FCOE) 1825 ctlr->priority = prio; 1826 1827 if (entry->app.protocol == ETH_P_FCOE) 1828 fcoe->priority = prio; 1829 1830 return NOTIFY_OK; 1831 } 1832 1833 /** 1834 * fcoe_device_notification() - Handler for net device events 1835 * @notifier: The context of the notification 1836 * @event: The type of event 1837 * @ptr: The net device that the event was on 1838 * 1839 * This function is called by the Ethernet driver in case of link change event. 1840 * 1841 * Returns: 0 for success 1842 */ 1843 static int fcoe_device_notification(struct notifier_block *notifier, 1844 ulong event, void *ptr) 1845 { 1846 struct fcoe_ctlr_device *cdev; 1847 struct fc_lport *lport = NULL; 1848 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 1849 struct fcoe_ctlr *ctlr; 1850 struct fcoe_interface *fcoe; 1851 struct fc_stats *stats; 1852 u32 link_possible = 1; 1853 u32 mfs; 1854 int rc = NOTIFY_OK; 1855 1856 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1857 if (fcoe->netdev == netdev) { 1858 ctlr = fcoe_to_ctlr(fcoe); 1859 lport = ctlr->lp; 1860 break; 1861 } 1862 } 1863 if (!lport) { 1864 rc = NOTIFY_DONE; 1865 goto out; 1866 } 1867 1868 switch (event) { 1869 case NETDEV_DOWN: 1870 case NETDEV_GOING_DOWN: 1871 link_possible = 0; 1872 break; 1873 case NETDEV_UP: 1874 case NETDEV_CHANGE: 1875 break; 1876 case NETDEV_CHANGEMTU: 1877 if (netdev->features & NETIF_F_FCOE_MTU) 1878 break; 1879 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + 1880 sizeof(struct fcoe_crc_eof)); 1881 if (mfs >= FC_MIN_MAX_FRAME) 1882 fc_set_mfs(lport, mfs); 1883 break; 1884 case NETDEV_REGISTER: 1885 break; 1886 case NETDEV_UNREGISTER: 1887 list_del(&fcoe->list); 1888 fcoe_vport_remove(lport); 1889 mutex_lock(&fcoe_config_mutex); 1890 fcoe_if_destroy(lport); 1891 if (!fcoe->removed) 1892 fcoe_interface_remove(fcoe); 1893 fcoe_interface_cleanup(fcoe); 1894 mutex_unlock(&fcoe_config_mutex); 1895 fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr)); 1896 goto out; 1897 break; 1898 case NETDEV_FEAT_CHANGE: 1899 fcoe_netdev_features_change(lport, netdev); 1900 break; 1901 default: 1902 FCOE_NETDEV_DBG(netdev, "Unknown event %ld " 1903 "from netdev netlink\n", event); 1904 } 1905 1906 fcoe_link_speed_update(lport); 1907 1908 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 1909 1910 if (link_possible && !fcoe_link_ok(lport)) { 1911 switch (cdev->enabled) { 1912 case FCOE_CTLR_DISABLED: 1913 pr_info("Link up while interface is disabled.\n"); 1914 break; 1915 case FCOE_CTLR_ENABLED: 1916 case FCOE_CTLR_UNUSED: 1917 fcoe_ctlr_link_up(ctlr); 1918 } 1919 } else if (fcoe_ctlr_link_down(ctlr)) { 1920 switch (cdev->enabled) { 1921 case FCOE_CTLR_DISABLED: 1922 pr_info("Link down while interface is disabled.\n"); 1923 break; 1924 case FCOE_CTLR_ENABLED: 1925 case FCOE_CTLR_UNUSED: 1926 stats = per_cpu_ptr(lport->stats, get_cpu()); 1927 stats->LinkFailureCount++; 1928 put_cpu(); 1929 fcoe_clean_pending_queue(lport); 1930 } 1931 } 1932 out: 1933 return rc; 1934 } 1935 1936 /** 1937 * fcoe_disable() - Disables a FCoE interface 1938 * @netdev : The net_device object the Ethernet interface to create on 1939 * 1940 * Called from fcoe transport. 1941 * 1942 * Returns: 0 for success 1943 * 1944 * Deprecated: use fcoe_ctlr_enabled() 1945 */ 1946 static int fcoe_disable(struct net_device *netdev) 1947 { 1948 struct fcoe_ctlr *ctlr; 1949 struct fcoe_interface *fcoe; 1950 int rc = 0; 1951 1952 mutex_lock(&fcoe_config_mutex); 1953 1954 rtnl_lock(); 1955 fcoe = fcoe_hostlist_lookup_port(netdev); 1956 rtnl_unlock(); 1957 1958 if (fcoe) { 1959 ctlr = fcoe_to_ctlr(fcoe); 1960 fcoe_ctlr_link_down(ctlr); 1961 fcoe_clean_pending_queue(ctlr->lp); 1962 } else 1963 rc = -ENODEV; 1964 1965 mutex_unlock(&fcoe_config_mutex); 1966 return rc; 1967 } 1968 1969 /** 1970 * fcoe_enable() - Enables a FCoE interface 1971 * @netdev : The net_device object the Ethernet interface to create on 1972 * 1973 * Called from fcoe transport. 1974 * 1975 * Returns: 0 for success 1976 */ 1977 static int fcoe_enable(struct net_device *netdev) 1978 { 1979 struct fcoe_ctlr *ctlr; 1980 struct fcoe_interface *fcoe; 1981 int rc = 0; 1982 1983 mutex_lock(&fcoe_config_mutex); 1984 rtnl_lock(); 1985 fcoe = fcoe_hostlist_lookup_port(netdev); 1986 rtnl_unlock(); 1987 1988 if (!fcoe) { 1989 rc = -ENODEV; 1990 goto out; 1991 } 1992 1993 ctlr = fcoe_to_ctlr(fcoe); 1994 1995 if (!fcoe_link_ok(ctlr->lp)) 1996 fcoe_ctlr_link_up(ctlr); 1997 1998 out: 1999 mutex_unlock(&fcoe_config_mutex); 2000 return rc; 2001 } 2002 2003 /** 2004 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller 2005 * @cdev: The FCoE Controller that is being enabled or disabled 2006 * 2007 * fcoe_sysfs will ensure that the state of 'enabled' has 2008 * changed, so no checking is necessary here. This routine simply 2009 * calls fcoe_enable or fcoe_disable, both of which are deprecated. 2010 * When those routines are removed the functionality can be merged 2011 * here. 2012 */ 2013 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev) 2014 { 2015 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev); 2016 struct fc_lport *lport = ctlr->lp; 2017 struct net_device *netdev = fcoe_netdev(lport); 2018 2019 switch (cdev->enabled) { 2020 case FCOE_CTLR_ENABLED: 2021 return fcoe_enable(netdev); 2022 case FCOE_CTLR_DISABLED: 2023 return fcoe_disable(netdev); 2024 case FCOE_CTLR_UNUSED: 2025 default: 2026 return -ENOTSUPP; 2027 }; 2028 } 2029 2030 /** 2031 * fcoe_ctlr_mode() - Switch FIP mode 2032 * @cdev: The FCoE Controller that is being modified 2033 * 2034 * When the FIP mode has been changed we need to update 2035 * the multicast addresses to ensure we get the correct 2036 * frames. 2037 */ 2038 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev) 2039 { 2040 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2041 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2042 2043 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN && 2044 ctlr->mode != FIP_MODE_VN2VN) { 2045 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS); 2046 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2047 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS); 2048 } else if (ctlr->mode != FIP_MODE_FABRIC) { 2049 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2050 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS); 2051 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS); 2052 } 2053 fcoe_ctlr_set_fip_mode(ctlr_dev); 2054 } 2055 2056 /** 2057 * fcoe_destroy() - Destroy a FCoE interface 2058 * @netdev : The net_device object the Ethernet interface to create on 2059 * 2060 * Called from fcoe transport 2061 * 2062 * Returns: 0 for success 2063 */ 2064 static int fcoe_destroy(struct net_device *netdev) 2065 { 2066 struct fcoe_ctlr *ctlr; 2067 struct fcoe_interface *fcoe; 2068 struct fc_lport *lport; 2069 struct fcoe_port *port; 2070 int rc = 0; 2071 2072 mutex_lock(&fcoe_config_mutex); 2073 rtnl_lock(); 2074 fcoe = fcoe_hostlist_lookup_port(netdev); 2075 if (!fcoe) { 2076 rc = -ENODEV; 2077 goto out_nodev; 2078 } 2079 ctlr = fcoe_to_ctlr(fcoe); 2080 lport = ctlr->lp; 2081 port = lport_priv(lport); 2082 list_del(&fcoe->list); 2083 queue_work(fcoe_wq, &port->destroy_work); 2084 out_nodev: 2085 rtnl_unlock(); 2086 mutex_unlock(&fcoe_config_mutex); 2087 return rc; 2088 } 2089 2090 /** 2091 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context 2092 * @work: Handle to the FCoE port to be destroyed 2093 */ 2094 static void fcoe_destroy_work(struct work_struct *work) 2095 { 2096 struct fcoe_ctlr_device *cdev; 2097 struct fcoe_ctlr *ctlr; 2098 struct fcoe_port *port; 2099 struct fcoe_interface *fcoe; 2100 2101 port = container_of(work, struct fcoe_port, destroy_work); 2102 2103 fcoe_vport_remove(port->lport); 2104 2105 mutex_lock(&fcoe_config_mutex); 2106 2107 fcoe = port->priv; 2108 ctlr = fcoe_to_ctlr(fcoe); 2109 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2110 2111 rtnl_lock(); 2112 fcoe_if_destroy(port->lport); 2113 if (!fcoe->removed) 2114 fcoe_interface_remove(fcoe); 2115 rtnl_unlock(); 2116 fcoe_interface_cleanup(fcoe); 2117 2118 mutex_unlock(&fcoe_config_mutex); 2119 2120 fcoe_ctlr_device_delete(cdev); 2121 } 2122 2123 /** 2124 * fcoe_match() - Check if the FCoE is supported on the given netdevice 2125 * @netdev : The net_device object the Ethernet interface to create on 2126 * 2127 * Called from fcoe transport. 2128 * 2129 * Returns: always returns true as this is the default FCoE transport, 2130 * i.e., support all netdevs. 2131 */ 2132 static bool fcoe_match(struct net_device *netdev) 2133 { 2134 return true; 2135 } 2136 2137 /** 2138 * fcoe_dcb_create() - Initialize DCB attributes and hooks 2139 * @netdev: The net_device object of the L2 link that should be queried 2140 * @port: The fcoe_port to bind FCoE APP priority with 2141 * @ 2142 */ 2143 static void fcoe_dcb_create(struct fcoe_interface *fcoe) 2144 { 2145 int ctlr_prio = TC_PRIO_BESTEFFORT; 2146 int fcoe_prio = TC_PRIO_INTERACTIVE; 2147 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2148 #ifdef CONFIG_DCB 2149 int dcbx; 2150 u8 fup, up; 2151 struct net_device *netdev = fcoe->realdev; 2152 struct dcb_app app = { 2153 .priority = 0, 2154 .protocol = ETH_P_FCOE 2155 }; 2156 2157 /* setup DCB priority attributes. */ 2158 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) { 2159 dcbx = netdev->dcbnl_ops->getdcbx(netdev); 2160 2161 if (dcbx & DCB_CAP_DCBX_VER_IEEE) { 2162 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; 2163 up = dcb_ieee_getapp_mask(netdev, &app); 2164 app.protocol = ETH_P_FIP; 2165 fup = dcb_ieee_getapp_mask(netdev, &app); 2166 } else { 2167 app.selector = DCB_APP_IDTYPE_ETHTYPE; 2168 up = dcb_getapp(netdev, &app); 2169 app.protocol = ETH_P_FIP; 2170 fup = dcb_getapp(netdev, &app); 2171 } 2172 2173 fcoe_prio = ffs(up) ? ffs(up) - 1 : 0; 2174 ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio; 2175 } 2176 #endif 2177 fcoe->priority = fcoe_prio; 2178 ctlr->priority = ctlr_prio; 2179 } 2180 2181 enum fcoe_create_link_state { 2182 FCOE_CREATE_LINK_DOWN, 2183 FCOE_CREATE_LINK_UP, 2184 }; 2185 2186 /** 2187 * _fcoe_create() - (internal) Create a fcoe interface 2188 * @netdev : The net_device object the Ethernet interface to create on 2189 * @fip_mode: The FIP mode for this creation 2190 * @link_state: The ctlr link state on creation 2191 * 2192 * Called from either the libfcoe 'create' module parameter 2193 * via fcoe_create or from fcoe_syfs's ctlr_create file. 2194 * 2195 * libfcoe's 'create' module parameter is deprecated so some 2196 * consolidation of code can be done when that interface is 2197 * removed. 2198 */ 2199 static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode, 2200 enum fcoe_create_link_state link_state) 2201 { 2202 int rc = 0; 2203 struct fcoe_ctlr_device *ctlr_dev; 2204 struct fcoe_ctlr *ctlr; 2205 struct fcoe_interface *fcoe; 2206 struct fc_lport *lport; 2207 2208 mutex_lock(&fcoe_config_mutex); 2209 rtnl_lock(); 2210 2211 /* look for existing lport */ 2212 if (fcoe_hostlist_lookup(netdev)) { 2213 rc = -EEXIST; 2214 goto out_nodev; 2215 } 2216 2217 fcoe = fcoe_interface_create(netdev, fip_mode); 2218 if (IS_ERR(fcoe)) { 2219 rc = PTR_ERR(fcoe); 2220 goto out_nodev; 2221 } 2222 2223 ctlr = fcoe_to_ctlr(fcoe); 2224 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr); 2225 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0); 2226 if (IS_ERR(lport)) { 2227 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", 2228 netdev->name); 2229 rc = -EIO; 2230 if (!fcoe->removed) 2231 fcoe_interface_remove(fcoe); 2232 rtnl_unlock(); 2233 fcoe_interface_cleanup(fcoe); 2234 mutex_unlock(&fcoe_config_mutex); 2235 fcoe_ctlr_device_delete(ctlr_dev); 2236 return rc; 2237 } 2238 2239 /* Make this the "master" N_Port */ 2240 ctlr->lp = lport; 2241 2242 /* setup DCB priority attributes. */ 2243 fcoe_dcb_create(fcoe); 2244 2245 /* start FIP Discovery and FLOGI */ 2246 lport->boot_time = jiffies; 2247 fc_fabric_login(lport); 2248 2249 /* 2250 * If the fcoe_ctlr_device is to be set to DISABLED 2251 * it must be done after the lport is added to the 2252 * hostlist, but before the rtnl_lock is released. 2253 * This is because the rtnl_lock protects the 2254 * hostlist that fcoe_device_notification uses. If 2255 * the FCoE Controller is intended to be created 2256 * DISABLED then 'enabled' needs to be considered 2257 * handling link events. 'enabled' must be set 2258 * before the lport can be found in the hostlist 2259 * when a link up event is received. 2260 */ 2261 if (link_state == FCOE_CREATE_LINK_UP) 2262 ctlr_dev->enabled = FCOE_CTLR_ENABLED; 2263 else 2264 ctlr_dev->enabled = FCOE_CTLR_DISABLED; 2265 2266 if (link_state == FCOE_CREATE_LINK_UP && 2267 !fcoe_link_ok(lport)) { 2268 rtnl_unlock(); 2269 fcoe_ctlr_link_up(ctlr); 2270 mutex_unlock(&fcoe_config_mutex); 2271 return rc; 2272 } 2273 2274 out_nodev: 2275 rtnl_unlock(); 2276 mutex_unlock(&fcoe_config_mutex); 2277 2278 return rc; 2279 } 2280 2281 /** 2282 * fcoe_create() - Create a fcoe interface 2283 * @netdev : The net_device object the Ethernet interface to create on 2284 * @fip_mode: The FIP mode for this creation 2285 * 2286 * Called from fcoe transport 2287 * 2288 * Returns: 0 for success 2289 */ 2290 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode) 2291 { 2292 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP); 2293 } 2294 2295 /** 2296 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs 2297 * @netdev: The net_device to be used by the allocated FCoE Controller 2298 * 2299 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr 2300 * in a link_down state. The allows the user an opportunity to configure 2301 * the FCoE Controller from sysfs before enabling the FCoE Controller. 2302 * 2303 * Creating in with this routine starts the FCoE Controller in Fabric 2304 * mode. The user can change to VN2VN or another mode before enabling. 2305 */ 2306 static int fcoe_ctlr_alloc(struct net_device *netdev) 2307 { 2308 return _fcoe_create(netdev, FIP_MODE_FABRIC, 2309 FCOE_CREATE_LINK_DOWN); 2310 } 2311 2312 /** 2313 * fcoe_link_ok() - Check if the link is OK for a local port 2314 * @lport: The local port to check link on 2315 * 2316 * Returns: 0 if link is UP and OK, -1 if not 2317 * 2318 */ 2319 static int fcoe_link_ok(struct fc_lport *lport) 2320 { 2321 struct net_device *netdev = fcoe_netdev(lport); 2322 2323 if (netif_oper_up(netdev)) 2324 return 0; 2325 return -1; 2326 } 2327 2328 /** 2329 * fcoe_percpu_clean() - Clear all pending skbs for an local port 2330 * @lport: The local port whose skbs are to be cleared 2331 * 2332 * Must be called with fcoe_create_mutex held to single-thread completion. 2333 * 2334 * This flushes the pending skbs by flush the work item for each CPU. The work 2335 * item on each possible CPU is flushed because we may have used the per-CPU 2336 * struct of an offline CPU. 2337 */ 2338 static void fcoe_percpu_clean(struct fc_lport *lport) 2339 { 2340 struct fcoe_percpu_s *pp; 2341 unsigned int cpu; 2342 2343 for_each_possible_cpu(cpu) { 2344 pp = &per_cpu(fcoe_percpu, cpu); 2345 2346 flush_work(&pp->work); 2347 } 2348 } 2349 2350 /** 2351 * fcoe_reset() - Reset a local port 2352 * @shost: The SCSI host associated with the local port to be reset 2353 * 2354 * Returns: Always 0 (return value required by FC transport template) 2355 */ 2356 static int fcoe_reset(struct Scsi_Host *shost) 2357 { 2358 struct fc_lport *lport = shost_priv(shost); 2359 struct fcoe_port *port = lport_priv(lport); 2360 struct fcoe_interface *fcoe = port->priv; 2361 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2362 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2363 2364 fcoe_ctlr_link_down(ctlr); 2365 fcoe_clean_pending_queue(ctlr->lp); 2366 2367 if (cdev->enabled != FCOE_CTLR_DISABLED && 2368 !fcoe_link_ok(ctlr->lp)) 2369 fcoe_ctlr_link_up(ctlr); 2370 return 0; 2371 } 2372 2373 /** 2374 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device 2375 * @netdev: The net device used as a key 2376 * 2377 * Locking: Must be called with the RNL mutex held. 2378 * 2379 * Returns: NULL or the FCoE interface 2380 */ 2381 static struct fcoe_interface * 2382 fcoe_hostlist_lookup_port(const struct net_device *netdev) 2383 { 2384 struct fcoe_interface *fcoe; 2385 2386 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 2387 if (fcoe->netdev == netdev) 2388 return fcoe; 2389 } 2390 return NULL; 2391 } 2392 2393 /** 2394 * fcoe_hostlist_lookup() - Find the local port associated with a 2395 * given net device 2396 * @netdev: The netdevice used as a key 2397 * 2398 * Locking: Must be called with the RTNL mutex held 2399 * 2400 * Returns: NULL or the local port 2401 */ 2402 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) 2403 { 2404 struct fcoe_ctlr *ctlr; 2405 struct fcoe_interface *fcoe; 2406 2407 fcoe = fcoe_hostlist_lookup_port(netdev); 2408 ctlr = fcoe_to_ctlr(fcoe); 2409 return (fcoe) ? ctlr->lp : NULL; 2410 } 2411 2412 /** 2413 * fcoe_hostlist_add() - Add the FCoE interface identified by a local 2414 * port to the hostlist 2415 * @lport: The local port that identifies the FCoE interface to be added 2416 * 2417 * Locking: must be called with the RTNL mutex held 2418 * 2419 * Returns: 0 for success 2420 */ 2421 static int fcoe_hostlist_add(const struct fc_lport *lport) 2422 { 2423 struct fcoe_interface *fcoe; 2424 struct fcoe_port *port; 2425 2426 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); 2427 if (!fcoe) { 2428 port = lport_priv(lport); 2429 fcoe = port->priv; 2430 list_add_tail(&fcoe->list, &fcoe_hostlist); 2431 } 2432 return 0; 2433 } 2434 2435 /** 2436 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local 2437 * port to the hostlist 2438 * @lport: The local port that identifies the FCoE interface to be added 2439 * 2440 * Locking: must be called with the RTNL mutex held 2441 * 2442 */ 2443 static void fcoe_hostlist_del(const struct fc_lport *lport) 2444 { 2445 struct fcoe_interface *fcoe; 2446 struct fcoe_port *port; 2447 2448 port = lport_priv(lport); 2449 fcoe = port->priv; 2450 list_del(&fcoe->list); 2451 return; 2452 } 2453 2454 static struct fcoe_transport fcoe_sw_transport = { 2455 .name = {FCOE_TRANSPORT_DEFAULT}, 2456 .attached = false, 2457 .list = LIST_HEAD_INIT(fcoe_sw_transport.list), 2458 .match = fcoe_match, 2459 .alloc = fcoe_ctlr_alloc, 2460 .create = fcoe_create, 2461 .destroy = fcoe_destroy, 2462 .enable = fcoe_enable, 2463 .disable = fcoe_disable, 2464 }; 2465 2466 /** 2467 * fcoe_init() - Initialize fcoe.ko 2468 * 2469 * Returns: 0 on success, or a negative value on failure 2470 */ 2471 static int __init fcoe_init(void) 2472 { 2473 struct fcoe_percpu_s *p; 2474 unsigned int cpu; 2475 int rc = 0; 2476 2477 fcoe_wq = alloc_workqueue("fcoe", 0, 0); 2478 if (!fcoe_wq) 2479 return -ENOMEM; 2480 2481 /* register as a fcoe transport */ 2482 rc = fcoe_transport_attach(&fcoe_sw_transport); 2483 if (rc) { 2484 printk(KERN_ERR "failed to register an fcoe transport, check " 2485 "if libfcoe is loaded\n"); 2486 goto out_destroy; 2487 } 2488 2489 mutex_lock(&fcoe_config_mutex); 2490 2491 for_each_possible_cpu(cpu) { 2492 p = per_cpu_ptr(&fcoe_percpu, cpu); 2493 INIT_WORK(&p->work, fcoe_receive_work); 2494 skb_queue_head_init(&p->fcoe_rx_list); 2495 } 2496 2497 /* Setup link change notification */ 2498 fcoe_dev_setup(); 2499 2500 rc = fcoe_if_init(); 2501 if (rc) 2502 goto out_free; 2503 2504 mutex_unlock(&fcoe_config_mutex); 2505 return 0; 2506 2507 out_free: 2508 mutex_unlock(&fcoe_config_mutex); 2509 out_destroy: 2510 destroy_workqueue(fcoe_wq); 2511 return rc; 2512 } 2513 module_init(fcoe_init); 2514 2515 /** 2516 * fcoe_exit() - Clean up fcoe.ko 2517 * 2518 * Returns: 0 on success or a negative value on failure 2519 */ 2520 static void __exit fcoe_exit(void) 2521 { 2522 struct fcoe_interface *fcoe, *tmp; 2523 struct fcoe_ctlr *ctlr; 2524 struct fcoe_port *port; 2525 unsigned int cpu; 2526 2527 mutex_lock(&fcoe_config_mutex); 2528 2529 fcoe_dev_cleanup(); 2530 2531 /* releases the associated fcoe hosts */ 2532 rtnl_lock(); 2533 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { 2534 ctlr = fcoe_to_ctlr(fcoe); 2535 port = lport_priv(ctlr->lp); 2536 fcoe_hostlist_del(port->lport); 2537 queue_work(fcoe_wq, &port->destroy_work); 2538 } 2539 rtnl_unlock(); 2540 2541 for_each_possible_cpu(cpu) 2542 fcoe_thread_cleanup_local(cpu); 2543 2544 mutex_unlock(&fcoe_config_mutex); 2545 2546 /* 2547 * destroy_work's may be chained but destroy_workqueue() 2548 * can take care of them. Just kill the fcoe_wq. 2549 */ 2550 destroy_workqueue(fcoe_wq); 2551 2552 /* 2553 * Detaching from the scsi transport must happen after all 2554 * destroys are done on the fcoe_wq. destroy_workqueue will 2555 * enusre the fcoe_wq is flushed. 2556 */ 2557 fcoe_if_exit(); 2558 2559 /* detach from fcoe transport */ 2560 fcoe_transport_detach(&fcoe_sw_transport); 2561 } 2562 module_exit(fcoe_exit); 2563 2564 /** 2565 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler 2566 * @seq: active sequence in the FLOGI or FDISC exchange 2567 * @fp: response frame, or error encoded in a pointer (timeout) 2568 * @arg: pointer to the fcoe_ctlr structure 2569 * 2570 * This handles MAC address management for FCoE, then passes control on to 2571 * the libfc FLOGI response handler. 2572 */ 2573 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2574 { 2575 struct fcoe_ctlr *fip = arg; 2576 struct fc_exch *exch = fc_seq_exch(seq); 2577 struct fc_lport *lport = exch->lp; 2578 u8 *mac; 2579 2580 if (IS_ERR(fp)) 2581 goto done; 2582 2583 mac = fr_cb(fp)->granted_mac; 2584 /* pre-FIP */ 2585 if (is_zero_ether_addr(mac)) 2586 fcoe_ctlr_recv_flogi(fip, lport, fp); 2587 if (!is_zero_ether_addr(mac)) 2588 fcoe_update_src_mac(lport, mac); 2589 done: 2590 fc_lport_flogi_resp(seq, fp, lport); 2591 } 2592 2593 /** 2594 * fcoe_logo_resp() - FCoE specific LOGO response handler 2595 * @seq: active sequence in the LOGO exchange 2596 * @fp: response frame, or error encoded in a pointer (timeout) 2597 * @arg: pointer to the fcoe_ctlr structure 2598 * 2599 * This handles MAC address management for FCoE, then passes control on to 2600 * the libfc LOGO response handler. 2601 */ 2602 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2603 { 2604 struct fc_lport *lport = arg; 2605 static u8 zero_mac[ETH_ALEN] = { 0 }; 2606 2607 if (!IS_ERR(fp)) 2608 fcoe_update_src_mac(lport, zero_mac); 2609 fc_lport_logo_resp(seq, fp, lport); 2610 } 2611 2612 /** 2613 * fcoe_elsct_send - FCoE specific ELS handler 2614 * 2615 * This does special case handling of FIP encapsualted ELS exchanges for FCoE, 2616 * using FCoE specific response handlers and passing the FIP controller as 2617 * the argument (the lport is still available from the exchange). 2618 * 2619 * Most of the work here is just handed off to the libfc routine. 2620 */ 2621 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, 2622 struct fc_frame *fp, unsigned int op, 2623 void (*resp)(struct fc_seq *, 2624 struct fc_frame *, 2625 void *), 2626 void *arg, u32 timeout) 2627 { 2628 struct fcoe_port *port = lport_priv(lport); 2629 struct fcoe_interface *fcoe = port->priv; 2630 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 2631 struct fc_frame_header *fh = fc_frame_header_get(fp); 2632 2633 switch (op) { 2634 case ELS_FLOGI: 2635 case ELS_FDISC: 2636 if (lport->point_to_multipoint) 2637 break; 2638 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, 2639 fip, timeout); 2640 case ELS_LOGO: 2641 /* only hook onto fabric logouts, not port logouts */ 2642 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) 2643 break; 2644 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, 2645 lport, timeout); 2646 } 2647 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); 2648 } 2649 2650 /** 2651 * fcoe_vport_create() - create an fc_host/scsi_host for a vport 2652 * @vport: fc_vport object to create a new fc_host for 2653 * @disabled: start the new fc_host in a disabled state by default? 2654 * 2655 * Returns: 0 for success 2656 */ 2657 static int fcoe_vport_create(struct fc_vport *vport, bool disabled) 2658 { 2659 struct Scsi_Host *shost = vport_to_shost(vport); 2660 struct fc_lport *n_port = shost_priv(shost); 2661 struct fcoe_port *port = lport_priv(n_port); 2662 struct fcoe_interface *fcoe = port->priv; 2663 struct net_device *netdev = fcoe->netdev; 2664 struct fc_lport *vn_port; 2665 int rc; 2666 char buf[32]; 2667 2668 rc = fcoe_validate_vport_create(vport); 2669 if (rc) { 2670 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf)); 2671 printk(KERN_ERR "fcoe: Failed to create vport, " 2672 "WWPN (0x%s) already exists\n", 2673 buf); 2674 return rc; 2675 } 2676 2677 mutex_lock(&fcoe_config_mutex); 2678 rtnl_lock(); 2679 vn_port = fcoe_if_create(fcoe, &vport->dev, 1); 2680 rtnl_unlock(); 2681 mutex_unlock(&fcoe_config_mutex); 2682 2683 if (IS_ERR(vn_port)) { 2684 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", 2685 netdev->name); 2686 return -EIO; 2687 } 2688 2689 if (disabled) { 2690 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2691 } else { 2692 vn_port->boot_time = jiffies; 2693 fc_fabric_login(vn_port); 2694 fc_vport_setlink(vn_port); 2695 } 2696 return 0; 2697 } 2698 2699 /** 2700 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport 2701 * @vport: fc_vport object that is being destroyed 2702 * 2703 * Returns: 0 for success 2704 */ 2705 static int fcoe_vport_destroy(struct fc_vport *vport) 2706 { 2707 struct Scsi_Host *shost = vport_to_shost(vport); 2708 struct fc_lport *n_port = shost_priv(shost); 2709 struct fc_lport *vn_port = vport->dd_data; 2710 2711 mutex_lock(&n_port->lp_mutex); 2712 list_del(&vn_port->list); 2713 mutex_unlock(&n_port->lp_mutex); 2714 2715 mutex_lock(&fcoe_config_mutex); 2716 rtnl_lock(); 2717 fcoe_if_destroy(vn_port); 2718 rtnl_unlock(); 2719 mutex_unlock(&fcoe_config_mutex); 2720 2721 return 0; 2722 } 2723 2724 /** 2725 * fcoe_vport_remove() - remove attached vports 2726 * @lport: lport for which the vports should be removed 2727 */ 2728 static void fcoe_vport_remove(struct fc_lport *lport) 2729 { 2730 struct Scsi_Host *shost; 2731 struct fc_host_attrs *fc_host; 2732 unsigned long flags; 2733 struct fc_vport *vport; 2734 struct fc_vport *next_vport; 2735 2736 shost = lport->host; 2737 fc_host = shost_to_fc_host(shost); 2738 2739 /* Loop through all the vports and mark them for deletion */ 2740 spin_lock_irqsave(shost->host_lock, flags); 2741 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2742 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 2743 continue; 2744 } else { 2745 vport->flags |= FC_VPORT_DELETING; 2746 queue_work(fc_host_work_q(shost), 2747 &vport->vport_delete_work); 2748 } 2749 } 2750 spin_unlock_irqrestore(shost->host_lock, flags); 2751 2752 flush_workqueue(fc_host_work_q(shost)); 2753 } 2754 2755 /** 2756 * fcoe_vport_disable() - change vport state 2757 * @vport: vport to bring online/offline 2758 * @disable: should the vport be disabled? 2759 */ 2760 static int fcoe_vport_disable(struct fc_vport *vport, bool disable) 2761 { 2762 struct fc_lport *lport = vport->dd_data; 2763 2764 if (disable) { 2765 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2766 fc_fabric_logoff(lport); 2767 } else { 2768 lport->boot_time = jiffies; 2769 fc_fabric_login(lport); 2770 fc_vport_setlink(lport); 2771 } 2772 2773 return 0; 2774 } 2775 2776 /** 2777 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name 2778 * @vport: fc_vport with a new symbolic name string 2779 * 2780 * After generating a new symbolic name string, a new RSPN_ID request is 2781 * sent to the name server. There is no response handler, so if it fails 2782 * for some reason it will not be retried. 2783 */ 2784 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) 2785 { 2786 struct fc_lport *lport = vport->dd_data; 2787 struct fc_frame *fp; 2788 size_t len; 2789 2790 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 2791 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, 2792 fcoe_netdev(lport)->name, vport->symbolic_name); 2793 2794 if (lport->state != LPORT_ST_READY) 2795 return; 2796 2797 len = strnlen(fc_host_symbolic_name(lport->host), 255); 2798 fp = fc_frame_alloc(lport, 2799 sizeof(struct fc_ct_hdr) + 2800 sizeof(struct fc_ns_rspn) + len); 2801 if (!fp) 2802 return; 2803 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, 2804 NULL, NULL, 3 * lport->r_a_tov); 2805 } 2806 2807 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev) 2808 { 2809 struct fcoe_ctlr_device *ctlr_dev = 2810 fcoe_fcf_dev_to_ctlr_dev(fcf_dev); 2811 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2812 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2813 2814 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev); 2815 } 2816 2817 /** 2818 * fcoe_set_port_id() - Callback from libfc when Port_ID is set. 2819 * @lport: the local port 2820 * @port_id: the port ID 2821 * @fp: the received frame, if any, that caused the port_id to be set. 2822 * 2823 * This routine handles the case where we received a FLOGI and are 2824 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() 2825 * so it can set the non-mapped mode and gateway address. 2826 * 2827 * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). 2828 */ 2829 static void fcoe_set_port_id(struct fc_lport *lport, 2830 u32 port_id, struct fc_frame *fp) 2831 { 2832 struct fcoe_port *port = lport_priv(lport); 2833 struct fcoe_interface *fcoe = port->priv; 2834 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2835 2836 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) 2837 fcoe_ctlr_recv_flogi(ctlr, lport, fp); 2838 } 2839