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