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 = netdev->gso_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 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++; 1438 put_cpu(); 1439 err2: 1440 kfree_skb(skb); 1441 return NET_RX_DROP; 1442 } 1443 1444 /** 1445 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC 1446 * @skb: The packet to be transmitted 1447 * @tlen: The total length of the trailer 1448 * 1449 * Returns: 0 for success 1450 */ 1451 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) 1452 { 1453 struct fcoe_percpu_s *fps; 1454 int rc; 1455 1456 fps = &get_cpu_var(fcoe_percpu); 1457 rc = fcoe_get_paged_crc_eof(skb, tlen, fps); 1458 put_cpu_var(fcoe_percpu); 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_stats *stats; 1478 struct fc_frame_header *fh; 1479 unsigned int hlen; /* header length implies the version */ 1480 unsigned int tlen; /* trailer length */ 1481 unsigned int elen; /* eth header, may include vlan */ 1482 struct fcoe_port *port = lport_priv(lport); 1483 struct fcoe_interface *fcoe = port->priv; 1484 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1485 u8 sof, eof; 1486 struct fcoe_hdr *hp; 1487 1488 WARN_ON((fr_len(fp) % sizeof(u32)) != 0); 1489 1490 fh = fc_frame_header_get(fp); 1491 skb = fp_skb(fp); 1492 wlen = skb->len / FCOE_WORD_TO_BYTE; 1493 1494 if (!lport->link_up) { 1495 kfree_skb(skb); 1496 return 0; 1497 } 1498 1499 if (unlikely(fh->fh_type == FC_TYPE_ELS) && 1500 fcoe_ctlr_els_send(ctlr, lport, skb)) 1501 return 0; 1502 1503 sof = fr_sof(fp); 1504 eof = fr_eof(fp); 1505 1506 elen = sizeof(struct ethhdr); 1507 hlen = sizeof(struct fcoe_hdr); 1508 tlen = sizeof(struct fcoe_crc_eof); 1509 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; 1510 1511 /* crc offload */ 1512 if (likely(lport->crc_offload)) { 1513 skb->ip_summed = CHECKSUM_PARTIAL; 1514 skb->csum_start = skb_headroom(skb); 1515 skb->csum_offset = skb->len; 1516 crc = 0; 1517 } else { 1518 skb->ip_summed = CHECKSUM_NONE; 1519 crc = fcoe_fc_crc(fp); 1520 } 1521 1522 /* copy port crc and eof to the skb buff */ 1523 if (skb_is_nonlinear(skb)) { 1524 skb_frag_t *frag; 1525 if (fcoe_alloc_paged_crc_eof(skb, tlen)) { 1526 kfree_skb(skb); 1527 return -ENOMEM; 1528 } 1529 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; 1530 cp = kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag); 1531 } else { 1532 cp = skb_put(skb, tlen); 1533 } 1534 1535 memset(cp, 0, sizeof(*cp)); 1536 cp->fcoe_eof = eof; 1537 cp->fcoe_crc32 = cpu_to_le32(~crc); 1538 1539 if (skb_is_nonlinear(skb)) { 1540 kunmap_atomic(cp); 1541 cp = NULL; 1542 } 1543 1544 /* adjust skb network/transport offsets to match mac/fcoe/port */ 1545 skb_push(skb, elen + hlen); 1546 skb_reset_mac_header(skb); 1547 skb_reset_network_header(skb); 1548 skb->mac_len = elen; 1549 skb->protocol = htons(ETH_P_FCOE); 1550 skb->priority = fcoe->priority; 1551 1552 if (is_vlan_dev(fcoe->netdev) && 1553 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) { 1554 /* must set skb->dev before calling vlan_put_tag */ 1555 skb->dev = fcoe->realdev; 1556 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1557 vlan_dev_vlan_id(fcoe->netdev)); 1558 } else 1559 skb->dev = fcoe->netdev; 1560 1561 /* fill up mac and fcoe headers */ 1562 eh = eth_hdr(skb); 1563 eh->h_proto = htons(ETH_P_FCOE); 1564 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN); 1565 if (ctlr->map_dest) 1566 memcpy(eh->h_dest + 3, fh->fh_d_id, 3); 1567 1568 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN)) 1569 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN); 1570 else 1571 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); 1572 1573 hp = (struct fcoe_hdr *)(eh + 1); 1574 memset(hp, 0, sizeof(*hp)); 1575 if (FC_FCOE_VER) 1576 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); 1577 hp->fcoe_sof = sof; 1578 1579 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ 1580 if (lport->seq_offload && fr_max_payload(fp)) { 1581 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; 1582 skb_shinfo(skb)->gso_size = fr_max_payload(fp); 1583 } else { 1584 skb_shinfo(skb)->gso_type = 0; 1585 skb_shinfo(skb)->gso_size = 0; 1586 } 1587 /* update tx stats: regardless if LLD fails */ 1588 stats = per_cpu_ptr(lport->stats, get_cpu()); 1589 stats->TxFrames++; 1590 stats->TxWords += wlen; 1591 put_cpu(); 1592 1593 /* send down to lld */ 1594 fr_dev(fp) = lport; 1595 fcoe_port_send(port, skb); 1596 return 0; 1597 } 1598 1599 /** 1600 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC 1601 * @lport: The local port the frame was received on 1602 * @fp: The received frame 1603 * 1604 * Return: 0 on passing filtering checks 1605 */ 1606 static inline int fcoe_filter_frames(struct fc_lport *lport, 1607 struct fc_frame *fp) 1608 { 1609 struct fcoe_ctlr *ctlr; 1610 struct fcoe_interface *fcoe; 1611 struct fc_frame_header *fh; 1612 struct sk_buff *skb = (struct sk_buff *)fp; 1613 struct fc_stats *stats; 1614 1615 /* 1616 * We only check CRC if no offload is available and if it is 1617 * it's solicited data, in which case, the FCP layer would 1618 * check it during the copy. 1619 */ 1620 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) 1621 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1622 else 1623 fr_flags(fp) |= FCPHF_CRC_UNCHECKED; 1624 1625 fh = fc_frame_header_get(fp); 1626 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) 1627 return 0; 1628 1629 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; 1630 ctlr = fcoe_to_ctlr(fcoe); 1631 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && 1632 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { 1633 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); 1634 return -EINVAL; 1635 } 1636 1637 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || 1638 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { 1639 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1640 return 0; 1641 } 1642 1643 stats = per_cpu_ptr(lport->stats, get_cpu()); 1644 stats->InvalidCRCCount++; 1645 if (stats->InvalidCRCCount < 5) 1646 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); 1647 put_cpu(); 1648 return -EINVAL; 1649 } 1650 1651 /** 1652 * fcoe_recv_frame() - process a single received frame 1653 * @skb: frame to process 1654 */ 1655 static void fcoe_recv_frame(struct sk_buff *skb) 1656 { 1657 u32 fr_len; 1658 struct fc_lport *lport; 1659 struct fcoe_rcv_info *fr; 1660 struct fc_stats *stats; 1661 struct fcoe_crc_eof crc_eof; 1662 struct fc_frame *fp; 1663 struct fcoe_hdr *hp; 1664 1665 fr = fcoe_dev_from_skb(skb); 1666 lport = fr->fr_dev; 1667 if (unlikely(!lport)) { 1668 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n"); 1669 kfree_skb(skb); 1670 return; 1671 } 1672 1673 FCOE_NETDEV_DBG(skb->dev, 1674 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1675 skb->len, skb->data_len, 1676 skb->head, skb->data, skb_tail_pointer(skb), 1677 skb_end_pointer(skb), skb->csum, 1678 skb->dev ? skb->dev->name : "<NULL>"); 1679 1680 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ 1681 1682 /* 1683 * Frame length checks and setting up the header pointers 1684 * was done in fcoe_rcv already. 1685 */ 1686 hp = (struct fcoe_hdr *) skb_network_header(skb); 1687 1688 stats = per_cpu_ptr(lport->stats, get_cpu()); 1689 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { 1690 if (stats->ErrorFrames < 5) 1691 printk(KERN_WARNING "fcoe: FCoE version " 1692 "mismatch: The frame has " 1693 "version %x, but the " 1694 "initiator supports version " 1695 "%x\n", FC_FCOE_DECAPS_VER(hp), 1696 FC_FCOE_VER); 1697 goto drop; 1698 } 1699 1700 skb_pull(skb, sizeof(struct fcoe_hdr)); 1701 fr_len = skb->len - sizeof(struct fcoe_crc_eof); 1702 1703 stats->RxFrames++; 1704 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; 1705 1706 fp = (struct fc_frame *)skb; 1707 fc_frame_init(fp); 1708 fr_dev(fp) = lport; 1709 fr_sof(fp) = hp->fcoe_sof; 1710 1711 /* Copy out the CRC and EOF trailer for access */ 1712 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) 1713 goto drop; 1714 fr_eof(fp) = crc_eof.fcoe_eof; 1715 fr_crc(fp) = crc_eof.fcoe_crc32; 1716 if (pskb_trim(skb, fr_len)) 1717 goto drop; 1718 1719 if (!fcoe_filter_frames(lport, fp)) { 1720 put_cpu(); 1721 fc_exch_recv(lport, fp); 1722 return; 1723 } 1724 drop: 1725 stats->ErrorFrames++; 1726 put_cpu(); 1727 kfree_skb(skb); 1728 } 1729 1730 /** 1731 * fcoe_receive_work() - The per-CPU worker 1732 * @work: The work struct 1733 * 1734 */ 1735 static void fcoe_receive_work(struct work_struct *work) 1736 { 1737 struct fcoe_percpu_s *p; 1738 struct sk_buff *skb; 1739 struct sk_buff_head tmp; 1740 1741 p = container_of(work, struct fcoe_percpu_s, work); 1742 skb_queue_head_init(&tmp); 1743 1744 spin_lock_bh(&p->fcoe_rx_list.lock); 1745 skb_queue_splice_init(&p->fcoe_rx_list, &tmp); 1746 spin_unlock_bh(&p->fcoe_rx_list.lock); 1747 1748 if (!skb_queue_len(&tmp)) 1749 return; 1750 1751 while ((skb = __skb_dequeue(&tmp))) 1752 fcoe_recv_frame(skb); 1753 } 1754 1755 /** 1756 * fcoe_dev_setup() - Setup the link change notification interface 1757 */ 1758 static void fcoe_dev_setup(void) 1759 { 1760 register_dcbevent_notifier(&dcb_notifier); 1761 register_netdevice_notifier(&fcoe_notifier); 1762 } 1763 1764 /** 1765 * fcoe_dev_cleanup() - Cleanup the link change notification interface 1766 */ 1767 static void fcoe_dev_cleanup(void) 1768 { 1769 unregister_dcbevent_notifier(&dcb_notifier); 1770 unregister_netdevice_notifier(&fcoe_notifier); 1771 } 1772 1773 static struct fcoe_interface * 1774 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev) 1775 { 1776 struct fcoe_interface *fcoe; 1777 struct net_device *real_dev; 1778 1779 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1780 if (is_vlan_dev(fcoe->netdev)) 1781 real_dev = vlan_dev_real_dev(fcoe->netdev); 1782 else 1783 real_dev = fcoe->netdev; 1784 1785 if (netdev == real_dev) 1786 return fcoe; 1787 } 1788 return NULL; 1789 } 1790 1791 static int fcoe_dcb_app_notification(struct notifier_block *notifier, 1792 ulong event, void *ptr) 1793 { 1794 struct dcb_app_type *entry = ptr; 1795 struct fcoe_ctlr *ctlr; 1796 struct fcoe_interface *fcoe; 1797 struct net_device *netdev; 1798 int prio; 1799 1800 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE) 1801 return NOTIFY_OK; 1802 1803 netdev = dev_get_by_index(&init_net, entry->ifindex); 1804 if (!netdev) 1805 return NOTIFY_OK; 1806 1807 fcoe = fcoe_hostlist_lookup_realdev_port(netdev); 1808 dev_put(netdev); 1809 if (!fcoe) 1810 return NOTIFY_OK; 1811 1812 ctlr = fcoe_to_ctlr(fcoe); 1813 1814 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE) 1815 prio = ffs(entry->app.priority) - 1; 1816 else 1817 prio = entry->app.priority; 1818 1819 if (prio < 0) 1820 return NOTIFY_OK; 1821 1822 if (entry->app.protocol == ETH_P_FIP || 1823 entry->app.protocol == ETH_P_FCOE) 1824 ctlr->priority = prio; 1825 1826 if (entry->app.protocol == ETH_P_FCOE) 1827 fcoe->priority = prio; 1828 1829 return NOTIFY_OK; 1830 } 1831 1832 /** 1833 * fcoe_device_notification() - Handler for net device events 1834 * @notifier: The context of the notification 1835 * @event: The type of event 1836 * @ptr: The net device that the event was on 1837 * 1838 * This function is called by the Ethernet driver in case of link change event. 1839 * 1840 * Returns: 0 for success 1841 */ 1842 static int fcoe_device_notification(struct notifier_block *notifier, 1843 ulong event, void *ptr) 1844 { 1845 struct fcoe_ctlr_device *cdev; 1846 struct fc_lport *lport = NULL; 1847 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 1848 struct fcoe_ctlr *ctlr; 1849 struct fcoe_interface *fcoe; 1850 struct fc_stats *stats; 1851 u32 link_possible = 1; 1852 u32 mfs; 1853 int rc = NOTIFY_OK; 1854 1855 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1856 if (fcoe->netdev == netdev) { 1857 ctlr = fcoe_to_ctlr(fcoe); 1858 lport = ctlr->lp; 1859 break; 1860 } 1861 } 1862 if (!lport) { 1863 rc = NOTIFY_DONE; 1864 goto out; 1865 } 1866 1867 switch (event) { 1868 case NETDEV_DOWN: 1869 case NETDEV_GOING_DOWN: 1870 link_possible = 0; 1871 break; 1872 case NETDEV_UP: 1873 case NETDEV_CHANGE: 1874 break; 1875 case NETDEV_CHANGEMTU: 1876 if (netdev->features & NETIF_F_FCOE_MTU) 1877 break; 1878 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + 1879 sizeof(struct fcoe_crc_eof)); 1880 if (mfs >= FC_MIN_MAX_FRAME) 1881 fc_set_mfs(lport, mfs); 1882 break; 1883 case NETDEV_REGISTER: 1884 break; 1885 case NETDEV_UNREGISTER: 1886 list_del(&fcoe->list); 1887 fcoe_vport_remove(lport); 1888 mutex_lock(&fcoe_config_mutex); 1889 fcoe_if_destroy(lport); 1890 if (!fcoe->removed) 1891 fcoe_interface_remove(fcoe); 1892 fcoe_interface_cleanup(fcoe); 1893 mutex_unlock(&fcoe_config_mutex); 1894 fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr)); 1895 goto out; 1896 case NETDEV_FEAT_CHANGE: 1897 fcoe_netdev_features_change(lport, netdev); 1898 break; 1899 default: 1900 FCOE_NETDEV_DBG(netdev, "Unknown event %ld " 1901 "from netdev netlink\n", event); 1902 } 1903 1904 fcoe_link_speed_update(lport); 1905 1906 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 1907 1908 if (link_possible && !fcoe_link_ok(lport)) { 1909 switch (cdev->enabled) { 1910 case FCOE_CTLR_DISABLED: 1911 pr_info("Link up while interface is disabled.\n"); 1912 break; 1913 case FCOE_CTLR_ENABLED: 1914 case FCOE_CTLR_UNUSED: 1915 fcoe_ctlr_link_up(ctlr); 1916 } 1917 } else if (fcoe_ctlr_link_down(ctlr)) { 1918 switch (cdev->enabled) { 1919 case FCOE_CTLR_DISABLED: 1920 pr_info("Link down while interface is disabled.\n"); 1921 break; 1922 case FCOE_CTLR_ENABLED: 1923 case FCOE_CTLR_UNUSED: 1924 stats = per_cpu_ptr(lport->stats, get_cpu()); 1925 stats->LinkFailureCount++; 1926 put_cpu(); 1927 fcoe_clean_pending_queue(lport); 1928 } 1929 } 1930 out: 1931 return rc; 1932 } 1933 1934 /** 1935 * fcoe_disable() - Disables a FCoE interface 1936 * @netdev : The net_device object the Ethernet interface to create on 1937 * 1938 * Called from fcoe transport. 1939 * 1940 * Returns: 0 for success 1941 * 1942 * Deprecated: use fcoe_ctlr_enabled() 1943 */ 1944 static int fcoe_disable(struct net_device *netdev) 1945 { 1946 struct fcoe_ctlr *ctlr; 1947 struct fcoe_interface *fcoe; 1948 int rc = 0; 1949 1950 mutex_lock(&fcoe_config_mutex); 1951 1952 rtnl_lock(); 1953 fcoe = fcoe_hostlist_lookup_port(netdev); 1954 rtnl_unlock(); 1955 1956 if (fcoe) { 1957 ctlr = fcoe_to_ctlr(fcoe); 1958 fcoe_ctlr_link_down(ctlr); 1959 fcoe_clean_pending_queue(ctlr->lp); 1960 } else 1961 rc = -ENODEV; 1962 1963 mutex_unlock(&fcoe_config_mutex); 1964 return rc; 1965 } 1966 1967 /** 1968 * fcoe_enable() - Enables a FCoE interface 1969 * @netdev : The net_device object the Ethernet interface to create on 1970 * 1971 * Called from fcoe transport. 1972 * 1973 * Returns: 0 for success 1974 */ 1975 static int fcoe_enable(struct net_device *netdev) 1976 { 1977 struct fcoe_ctlr *ctlr; 1978 struct fcoe_interface *fcoe; 1979 int rc = 0; 1980 1981 mutex_lock(&fcoe_config_mutex); 1982 rtnl_lock(); 1983 fcoe = fcoe_hostlist_lookup_port(netdev); 1984 rtnl_unlock(); 1985 1986 if (!fcoe) { 1987 rc = -ENODEV; 1988 goto out; 1989 } 1990 1991 ctlr = fcoe_to_ctlr(fcoe); 1992 1993 if (!fcoe_link_ok(ctlr->lp)) 1994 fcoe_ctlr_link_up(ctlr); 1995 1996 out: 1997 mutex_unlock(&fcoe_config_mutex); 1998 return rc; 1999 } 2000 2001 /** 2002 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller 2003 * @cdev: The FCoE Controller that is being enabled or disabled 2004 * 2005 * fcoe_sysfs will ensure that the state of 'enabled' has 2006 * changed, so no checking is necessary here. This routine simply 2007 * calls fcoe_enable or fcoe_disable, both of which are deprecated. 2008 * When those routines are removed the functionality can be merged 2009 * here. 2010 */ 2011 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev) 2012 { 2013 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev); 2014 struct fc_lport *lport = ctlr->lp; 2015 struct net_device *netdev = fcoe_netdev(lport); 2016 2017 switch (cdev->enabled) { 2018 case FCOE_CTLR_ENABLED: 2019 return fcoe_enable(netdev); 2020 case FCOE_CTLR_DISABLED: 2021 return fcoe_disable(netdev); 2022 case FCOE_CTLR_UNUSED: 2023 default: 2024 return -ENOTSUPP; 2025 } 2026 } 2027 2028 /** 2029 * fcoe_ctlr_mode() - Switch FIP mode 2030 * @ctlr_dev: The FCoE Controller that is being modified 2031 * 2032 * When the FIP mode has been changed we need to update 2033 * the multicast addresses to ensure we get the correct 2034 * frames. 2035 */ 2036 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev) 2037 { 2038 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2039 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2040 2041 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN && 2042 ctlr->mode != FIP_MODE_VN2VN) { 2043 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS); 2044 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2045 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS); 2046 } else if (ctlr->mode != FIP_MODE_FABRIC) { 2047 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2048 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS); 2049 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS); 2050 } 2051 fcoe_ctlr_set_fip_mode(ctlr_dev); 2052 } 2053 2054 /** 2055 * fcoe_destroy() - Destroy a FCoE interface 2056 * @netdev : The net_device object the Ethernet interface to create on 2057 * 2058 * Called from fcoe transport 2059 * 2060 * Returns: 0 for success 2061 */ 2062 static int fcoe_destroy(struct net_device *netdev) 2063 { 2064 struct fcoe_ctlr *ctlr; 2065 struct fcoe_interface *fcoe; 2066 struct fc_lport *lport; 2067 struct fcoe_port *port; 2068 int rc = 0; 2069 2070 mutex_lock(&fcoe_config_mutex); 2071 rtnl_lock(); 2072 fcoe = fcoe_hostlist_lookup_port(netdev); 2073 if (!fcoe) { 2074 rc = -ENODEV; 2075 goto out_nodev; 2076 } 2077 ctlr = fcoe_to_ctlr(fcoe); 2078 lport = ctlr->lp; 2079 port = lport_priv(lport); 2080 list_del(&fcoe->list); 2081 queue_work(fcoe_wq, &port->destroy_work); 2082 out_nodev: 2083 rtnl_unlock(); 2084 mutex_unlock(&fcoe_config_mutex); 2085 return rc; 2086 } 2087 2088 /** 2089 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context 2090 * @work: Handle to the FCoE port to be destroyed 2091 */ 2092 static void fcoe_destroy_work(struct work_struct *work) 2093 { 2094 struct fcoe_ctlr_device *cdev; 2095 struct fcoe_ctlr *ctlr; 2096 struct fcoe_port *port; 2097 struct fcoe_interface *fcoe; 2098 2099 port = container_of(work, struct fcoe_port, destroy_work); 2100 2101 fcoe_vport_remove(port->lport); 2102 2103 mutex_lock(&fcoe_config_mutex); 2104 2105 fcoe = port->priv; 2106 ctlr = fcoe_to_ctlr(fcoe); 2107 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2108 2109 rtnl_lock(); 2110 fcoe_if_destroy(port->lport); 2111 if (!fcoe->removed) 2112 fcoe_interface_remove(fcoe); 2113 rtnl_unlock(); 2114 fcoe_interface_cleanup(fcoe); 2115 2116 mutex_unlock(&fcoe_config_mutex); 2117 2118 fcoe_ctlr_device_delete(cdev); 2119 } 2120 2121 /** 2122 * fcoe_match() - Check if the FCoE is supported on the given netdevice 2123 * @netdev : The net_device object the Ethernet interface to create on 2124 * 2125 * Called from fcoe transport. 2126 * 2127 * Returns: always returns true as this is the default FCoE transport, 2128 * i.e., support all netdevs. 2129 */ 2130 static bool fcoe_match(struct net_device *netdev) 2131 { 2132 return true; 2133 } 2134 2135 /** 2136 * fcoe_dcb_create() - Initialize DCB attributes and hooks 2137 * @fcoe: The new FCoE interface 2138 */ 2139 static void fcoe_dcb_create(struct fcoe_interface *fcoe) 2140 { 2141 int ctlr_prio = TC_PRIO_BESTEFFORT; 2142 int fcoe_prio = TC_PRIO_INTERACTIVE; 2143 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2144 #ifdef CONFIG_DCB 2145 int dcbx; 2146 u8 fup, up; 2147 struct net_device *netdev = fcoe->realdev; 2148 struct dcb_app app = { 2149 .priority = 0, 2150 .protocol = ETH_P_FCOE 2151 }; 2152 2153 /* setup DCB priority attributes. */ 2154 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) { 2155 dcbx = netdev->dcbnl_ops->getdcbx(netdev); 2156 2157 if (dcbx & DCB_CAP_DCBX_VER_IEEE) { 2158 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; 2159 up = dcb_ieee_getapp_mask(netdev, &app); 2160 app.protocol = ETH_P_FIP; 2161 fup = dcb_ieee_getapp_mask(netdev, &app); 2162 } else { 2163 app.selector = DCB_APP_IDTYPE_ETHTYPE; 2164 up = dcb_getapp(netdev, &app); 2165 app.protocol = ETH_P_FIP; 2166 fup = dcb_getapp(netdev, &app); 2167 } 2168 2169 fcoe_prio = ffs(up) ? ffs(up) - 1 : 0; 2170 ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio; 2171 } 2172 #endif 2173 fcoe->priority = fcoe_prio; 2174 ctlr->priority = ctlr_prio; 2175 } 2176 2177 enum fcoe_create_link_state { 2178 FCOE_CREATE_LINK_DOWN, 2179 FCOE_CREATE_LINK_UP, 2180 }; 2181 2182 /** 2183 * _fcoe_create() - (internal) Create a fcoe interface 2184 * @netdev : The net_device object the Ethernet interface to create on 2185 * @fip_mode: The FIP mode for this creation 2186 * @link_state: The ctlr link state on creation 2187 * 2188 * Called from either the libfcoe 'create' module parameter 2189 * via fcoe_create or from fcoe_syfs's ctlr_create file. 2190 * 2191 * libfcoe's 'create' module parameter is deprecated so some 2192 * consolidation of code can be done when that interface is 2193 * removed. 2194 */ 2195 static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode, 2196 enum fcoe_create_link_state link_state) 2197 { 2198 int rc = 0; 2199 struct fcoe_ctlr_device *ctlr_dev; 2200 struct fcoe_ctlr *ctlr; 2201 struct fcoe_interface *fcoe; 2202 struct fc_lport *lport; 2203 2204 mutex_lock(&fcoe_config_mutex); 2205 rtnl_lock(); 2206 2207 /* look for existing lport */ 2208 if (fcoe_hostlist_lookup(netdev)) { 2209 rc = -EEXIST; 2210 goto out_nodev; 2211 } 2212 2213 fcoe = fcoe_interface_create(netdev, fip_mode); 2214 if (IS_ERR(fcoe)) { 2215 rc = PTR_ERR(fcoe); 2216 goto out_nodev; 2217 } 2218 2219 ctlr = fcoe_to_ctlr(fcoe); 2220 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr); 2221 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0); 2222 if (IS_ERR(lport)) { 2223 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", 2224 netdev->name); 2225 rc = -EIO; 2226 if (!fcoe->removed) 2227 fcoe_interface_remove(fcoe); 2228 rtnl_unlock(); 2229 fcoe_interface_cleanup(fcoe); 2230 mutex_unlock(&fcoe_config_mutex); 2231 fcoe_ctlr_device_delete(ctlr_dev); 2232 return rc; 2233 } 2234 2235 /* Make this the "master" N_Port */ 2236 ctlr->lp = lport; 2237 2238 /* setup DCB priority attributes. */ 2239 fcoe_dcb_create(fcoe); 2240 2241 /* start FIP Discovery and FLOGI */ 2242 lport->boot_time = jiffies; 2243 fc_fabric_login(lport); 2244 2245 /* 2246 * If the fcoe_ctlr_device is to be set to DISABLED 2247 * it must be done after the lport is added to the 2248 * hostlist, but before the rtnl_lock is released. 2249 * This is because the rtnl_lock protects the 2250 * hostlist that fcoe_device_notification uses. If 2251 * the FCoE Controller is intended to be created 2252 * DISABLED then 'enabled' needs to be considered 2253 * handling link events. 'enabled' must be set 2254 * before the lport can be found in the hostlist 2255 * when a link up event is received. 2256 */ 2257 if (link_state == FCOE_CREATE_LINK_UP) 2258 ctlr_dev->enabled = FCOE_CTLR_ENABLED; 2259 else 2260 ctlr_dev->enabled = FCOE_CTLR_DISABLED; 2261 2262 if (link_state == FCOE_CREATE_LINK_UP && 2263 !fcoe_link_ok(lport)) { 2264 rtnl_unlock(); 2265 fcoe_ctlr_link_up(ctlr); 2266 mutex_unlock(&fcoe_config_mutex); 2267 return rc; 2268 } 2269 2270 out_nodev: 2271 rtnl_unlock(); 2272 mutex_unlock(&fcoe_config_mutex); 2273 2274 return rc; 2275 } 2276 2277 /** 2278 * fcoe_create() - Create a fcoe interface 2279 * @netdev : The net_device object the Ethernet interface to create on 2280 * @fip_mode: The FIP mode for this creation 2281 * 2282 * Called from fcoe transport 2283 * 2284 * Returns: 0 for success 2285 */ 2286 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode) 2287 { 2288 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP); 2289 } 2290 2291 /** 2292 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs 2293 * @netdev: The net_device to be used by the allocated FCoE Controller 2294 * 2295 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr 2296 * in a link_down state. The allows the user an opportunity to configure 2297 * the FCoE Controller from sysfs before enabling the FCoE Controller. 2298 * 2299 * Creating in with this routine starts the FCoE Controller in Fabric 2300 * mode. The user can change to VN2VN or another mode before enabling. 2301 */ 2302 static int fcoe_ctlr_alloc(struct net_device *netdev) 2303 { 2304 return _fcoe_create(netdev, FIP_MODE_FABRIC, 2305 FCOE_CREATE_LINK_DOWN); 2306 } 2307 2308 /** 2309 * fcoe_link_ok() - Check if the link is OK for a local port 2310 * @lport: The local port to check link on 2311 * 2312 * Returns: 0 if link is UP and OK, -1 if not 2313 * 2314 */ 2315 static int fcoe_link_ok(struct fc_lport *lport) 2316 { 2317 struct net_device *netdev = fcoe_netdev(lport); 2318 2319 if (netif_oper_up(netdev)) 2320 return 0; 2321 return -1; 2322 } 2323 2324 /** 2325 * fcoe_percpu_clean() - Clear all pending skbs for an local port 2326 * @lport: The local port whose skbs are to be cleared 2327 * 2328 * Must be called with fcoe_create_mutex held to single-thread completion. 2329 * 2330 * This flushes the pending skbs by flush the work item for each CPU. The work 2331 * item on each possible CPU is flushed because we may have used the per-CPU 2332 * struct of an offline CPU. 2333 */ 2334 static void fcoe_percpu_clean(struct fc_lport *lport) 2335 { 2336 struct fcoe_percpu_s *pp; 2337 unsigned int cpu; 2338 2339 for_each_possible_cpu(cpu) { 2340 pp = &per_cpu(fcoe_percpu, cpu); 2341 2342 flush_work(&pp->work); 2343 } 2344 } 2345 2346 /** 2347 * fcoe_reset() - Reset a local port 2348 * @shost: The SCSI host associated with the local port to be reset 2349 * 2350 * Returns: Always 0 (return value required by FC transport template) 2351 */ 2352 static int fcoe_reset(struct Scsi_Host *shost) 2353 { 2354 struct fc_lport *lport = shost_priv(shost); 2355 struct fcoe_port *port = lport_priv(lport); 2356 struct fcoe_interface *fcoe = port->priv; 2357 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2358 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2359 2360 fcoe_ctlr_link_down(ctlr); 2361 fcoe_clean_pending_queue(ctlr->lp); 2362 2363 if (cdev->enabled != FCOE_CTLR_DISABLED && 2364 !fcoe_link_ok(ctlr->lp)) 2365 fcoe_ctlr_link_up(ctlr); 2366 return 0; 2367 } 2368 2369 /** 2370 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device 2371 * @netdev: The net device used as a key 2372 * 2373 * Locking: Must be called with the RNL mutex held. 2374 * 2375 * Returns: NULL or the FCoE interface 2376 */ 2377 static struct fcoe_interface * 2378 fcoe_hostlist_lookup_port(const struct net_device *netdev) 2379 { 2380 struct fcoe_interface *fcoe; 2381 2382 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 2383 if (fcoe->netdev == netdev) 2384 return fcoe; 2385 } 2386 return NULL; 2387 } 2388 2389 /** 2390 * fcoe_hostlist_lookup() - Find the local port associated with a 2391 * given net device 2392 * @netdev: The netdevice used as a key 2393 * 2394 * Locking: Must be called with the RTNL mutex held 2395 * 2396 * Returns: NULL or the local port 2397 */ 2398 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) 2399 { 2400 struct fcoe_ctlr *ctlr; 2401 struct fcoe_interface *fcoe; 2402 2403 fcoe = fcoe_hostlist_lookup_port(netdev); 2404 ctlr = fcoe_to_ctlr(fcoe); 2405 return (fcoe) ? ctlr->lp : NULL; 2406 } 2407 2408 /** 2409 * fcoe_hostlist_add() - Add the FCoE interface identified by a local 2410 * port to the hostlist 2411 * @lport: The local port that identifies the FCoE interface to be added 2412 * 2413 * Locking: must be called with the RTNL mutex held 2414 * 2415 * Returns: 0 for success 2416 */ 2417 static int fcoe_hostlist_add(const struct fc_lport *lport) 2418 { 2419 struct fcoe_interface *fcoe; 2420 struct fcoe_port *port; 2421 2422 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); 2423 if (!fcoe) { 2424 port = lport_priv(lport); 2425 fcoe = port->priv; 2426 list_add_tail(&fcoe->list, &fcoe_hostlist); 2427 } 2428 return 0; 2429 } 2430 2431 /** 2432 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local 2433 * port to the hostlist 2434 * @lport: The local port that identifies the FCoE interface to be added 2435 * 2436 * Locking: must be called with the RTNL mutex held 2437 * 2438 */ 2439 static void fcoe_hostlist_del(const struct fc_lport *lport) 2440 { 2441 struct fcoe_interface *fcoe; 2442 struct fcoe_port *port; 2443 2444 port = lport_priv(lport); 2445 fcoe = port->priv; 2446 list_del(&fcoe->list); 2447 return; 2448 } 2449 2450 static struct fcoe_transport fcoe_sw_transport = { 2451 .name = {FCOE_TRANSPORT_DEFAULT}, 2452 .attached = false, 2453 .list = LIST_HEAD_INIT(fcoe_sw_transport.list), 2454 .match = fcoe_match, 2455 .alloc = fcoe_ctlr_alloc, 2456 .create = fcoe_create, 2457 .destroy = fcoe_destroy, 2458 .enable = fcoe_enable, 2459 .disable = fcoe_disable, 2460 }; 2461 2462 /** 2463 * fcoe_init() - Initialize fcoe.ko 2464 * 2465 * Returns: 0 on success, or a negative value on failure 2466 */ 2467 static int __init fcoe_init(void) 2468 { 2469 struct fcoe_percpu_s *p; 2470 unsigned int cpu; 2471 int rc = 0; 2472 2473 fcoe_wq = alloc_workqueue("fcoe", 0, 0); 2474 if (!fcoe_wq) 2475 return -ENOMEM; 2476 2477 /* register as a fcoe transport */ 2478 rc = fcoe_transport_attach(&fcoe_sw_transport); 2479 if (rc) { 2480 printk(KERN_ERR "failed to register an fcoe transport, check " 2481 "if libfcoe is loaded\n"); 2482 goto out_destroy; 2483 } 2484 2485 mutex_lock(&fcoe_config_mutex); 2486 2487 for_each_possible_cpu(cpu) { 2488 p = per_cpu_ptr(&fcoe_percpu, cpu); 2489 INIT_WORK(&p->work, fcoe_receive_work); 2490 skb_queue_head_init(&p->fcoe_rx_list); 2491 } 2492 2493 /* Setup link change notification */ 2494 fcoe_dev_setup(); 2495 2496 rc = fcoe_if_init(); 2497 if (rc) 2498 goto out_free; 2499 2500 mutex_unlock(&fcoe_config_mutex); 2501 return 0; 2502 2503 out_free: 2504 mutex_unlock(&fcoe_config_mutex); 2505 out_destroy: 2506 destroy_workqueue(fcoe_wq); 2507 return rc; 2508 } 2509 module_init(fcoe_init); 2510 2511 /** 2512 * fcoe_exit() - Clean up fcoe.ko 2513 * 2514 * Returns: 0 on success or a negative value on failure 2515 */ 2516 static void __exit fcoe_exit(void) 2517 { 2518 struct fcoe_interface *fcoe, *tmp; 2519 struct fcoe_ctlr *ctlr; 2520 struct fcoe_port *port; 2521 unsigned int cpu; 2522 2523 mutex_lock(&fcoe_config_mutex); 2524 2525 fcoe_dev_cleanup(); 2526 2527 /* releases the associated fcoe hosts */ 2528 rtnl_lock(); 2529 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { 2530 ctlr = fcoe_to_ctlr(fcoe); 2531 port = lport_priv(ctlr->lp); 2532 fcoe_hostlist_del(port->lport); 2533 queue_work(fcoe_wq, &port->destroy_work); 2534 } 2535 rtnl_unlock(); 2536 2537 for_each_possible_cpu(cpu) 2538 fcoe_thread_cleanup_local(cpu); 2539 2540 mutex_unlock(&fcoe_config_mutex); 2541 2542 /* 2543 * destroy_work's may be chained but destroy_workqueue() 2544 * can take care of them. Just kill the fcoe_wq. 2545 */ 2546 destroy_workqueue(fcoe_wq); 2547 2548 /* 2549 * Detaching from the scsi transport must happen after all 2550 * destroys are done on the fcoe_wq. destroy_workqueue will 2551 * enusre the fcoe_wq is flushed. 2552 */ 2553 fcoe_if_exit(); 2554 2555 /* detach from fcoe transport */ 2556 fcoe_transport_detach(&fcoe_sw_transport); 2557 } 2558 module_exit(fcoe_exit); 2559 2560 /** 2561 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler 2562 * @seq: active sequence in the FLOGI or FDISC exchange 2563 * @fp: response frame, or error encoded in a pointer (timeout) 2564 * @arg: pointer to the fcoe_ctlr structure 2565 * 2566 * This handles MAC address management for FCoE, then passes control on to 2567 * the libfc FLOGI response handler. 2568 */ 2569 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2570 { 2571 struct fcoe_ctlr *fip = arg; 2572 struct fc_exch *exch = fc_seq_exch(seq); 2573 struct fc_lport *lport = exch->lp; 2574 u8 *mac; 2575 2576 if (IS_ERR(fp)) 2577 goto done; 2578 2579 mac = fr_cb(fp)->granted_mac; 2580 /* pre-FIP */ 2581 if (is_zero_ether_addr(mac)) 2582 fcoe_ctlr_recv_flogi(fip, lport, fp); 2583 if (!is_zero_ether_addr(mac)) 2584 fcoe_update_src_mac(lport, mac); 2585 done: 2586 fc_lport_flogi_resp(seq, fp, lport); 2587 } 2588 2589 /** 2590 * fcoe_logo_resp() - FCoE specific LOGO response handler 2591 * @seq: active sequence in the LOGO exchange 2592 * @fp: response frame, or error encoded in a pointer (timeout) 2593 * @arg: pointer to the fcoe_ctlr structure 2594 * 2595 * This handles MAC address management for FCoE, then passes control on to 2596 * the libfc LOGO response handler. 2597 */ 2598 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2599 { 2600 struct fc_lport *lport = arg; 2601 static u8 zero_mac[ETH_ALEN] = { 0 }; 2602 2603 if (!IS_ERR(fp)) 2604 fcoe_update_src_mac(lport, zero_mac); 2605 fc_lport_logo_resp(seq, fp, lport); 2606 } 2607 2608 /* 2609 * fcoe_elsct_send - FCoE specific ELS handler 2610 * 2611 * This does special case handling of FIP encapsualted ELS exchanges for FCoE, 2612 * using FCoE specific response handlers and passing the FIP controller as 2613 * the argument (the lport is still available from the exchange). 2614 * 2615 * Most of the work here is just handed off to the libfc routine. 2616 */ 2617 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, 2618 struct fc_frame *fp, unsigned int op, 2619 void (*resp)(struct fc_seq *, 2620 struct fc_frame *, 2621 void *), 2622 void *arg, u32 timeout) 2623 { 2624 struct fcoe_port *port = lport_priv(lport); 2625 struct fcoe_interface *fcoe = port->priv; 2626 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 2627 struct fc_frame_header *fh = fc_frame_header_get(fp); 2628 2629 switch (op) { 2630 case ELS_FLOGI: 2631 case ELS_FDISC: 2632 if (lport->point_to_multipoint) 2633 break; 2634 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, 2635 fip, timeout); 2636 case ELS_LOGO: 2637 /* only hook onto fabric logouts, not port logouts */ 2638 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) 2639 break; 2640 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, 2641 lport, timeout); 2642 } 2643 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); 2644 } 2645 2646 /** 2647 * fcoe_vport_create() - create an fc_host/scsi_host for a vport 2648 * @vport: fc_vport object to create a new fc_host for 2649 * @disabled: start the new fc_host in a disabled state by default? 2650 * 2651 * Returns: 0 for success 2652 */ 2653 static int fcoe_vport_create(struct fc_vport *vport, bool disabled) 2654 { 2655 struct Scsi_Host *shost = vport_to_shost(vport); 2656 struct fc_lport *n_port = shost_priv(shost); 2657 struct fcoe_port *port = lport_priv(n_port); 2658 struct fcoe_interface *fcoe = port->priv; 2659 struct net_device *netdev = fcoe->netdev; 2660 struct fc_lport *vn_port; 2661 int rc; 2662 char buf[32]; 2663 2664 rc = fcoe_validate_vport_create(vport); 2665 if (rc) { 2666 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf)); 2667 printk(KERN_ERR "fcoe: Failed to create vport, " 2668 "WWPN (0x%s) already exists\n", 2669 buf); 2670 return rc; 2671 } 2672 2673 mutex_lock(&fcoe_config_mutex); 2674 rtnl_lock(); 2675 vn_port = fcoe_if_create(fcoe, &vport->dev, 1); 2676 rtnl_unlock(); 2677 mutex_unlock(&fcoe_config_mutex); 2678 2679 if (IS_ERR(vn_port)) { 2680 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", 2681 netdev->name); 2682 return -EIO; 2683 } 2684 2685 if (disabled) { 2686 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2687 } else { 2688 vn_port->boot_time = jiffies; 2689 fc_fabric_login(vn_port); 2690 fc_vport_setlink(vn_port); 2691 } 2692 return 0; 2693 } 2694 2695 /** 2696 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport 2697 * @vport: fc_vport object that is being destroyed 2698 * 2699 * Returns: 0 for success 2700 */ 2701 static int fcoe_vport_destroy(struct fc_vport *vport) 2702 { 2703 struct Scsi_Host *shost = vport_to_shost(vport); 2704 struct fc_lport *n_port = shost_priv(shost); 2705 struct fc_lport *vn_port = vport->dd_data; 2706 2707 mutex_lock(&n_port->lp_mutex); 2708 list_del(&vn_port->list); 2709 mutex_unlock(&n_port->lp_mutex); 2710 2711 mutex_lock(&fcoe_config_mutex); 2712 rtnl_lock(); 2713 fcoe_if_destroy(vn_port); 2714 rtnl_unlock(); 2715 mutex_unlock(&fcoe_config_mutex); 2716 2717 return 0; 2718 } 2719 2720 /** 2721 * fcoe_vport_remove() - remove attached vports 2722 * @lport: lport for which the vports should be removed 2723 */ 2724 static void fcoe_vport_remove(struct fc_lport *lport) 2725 { 2726 struct Scsi_Host *shost; 2727 struct fc_host_attrs *fc_host; 2728 unsigned long flags; 2729 struct fc_vport *vport; 2730 struct fc_vport *next_vport; 2731 2732 shost = lport->host; 2733 fc_host = shost_to_fc_host(shost); 2734 2735 /* Loop through all the vports and mark them for deletion */ 2736 spin_lock_irqsave(shost->host_lock, flags); 2737 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2738 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 2739 continue; 2740 } else { 2741 vport->flags |= FC_VPORT_DELETING; 2742 queue_work(fc_host_work_q(shost), 2743 &vport->vport_delete_work); 2744 } 2745 } 2746 spin_unlock_irqrestore(shost->host_lock, flags); 2747 2748 flush_workqueue(fc_host_work_q(shost)); 2749 } 2750 2751 /** 2752 * fcoe_vport_disable() - change vport state 2753 * @vport: vport to bring online/offline 2754 * @disable: should the vport be disabled? 2755 */ 2756 static int fcoe_vport_disable(struct fc_vport *vport, bool disable) 2757 { 2758 struct fc_lport *lport = vport->dd_data; 2759 2760 if (disable) { 2761 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2762 fc_fabric_logoff(lport); 2763 } else { 2764 lport->boot_time = jiffies; 2765 fc_fabric_login(lport); 2766 fc_vport_setlink(lport); 2767 } 2768 2769 return 0; 2770 } 2771 2772 /** 2773 * fcoe_set_vport_symbolic_name() - append vport string to symbolic name 2774 * @vport: fc_vport with a new symbolic name string 2775 * 2776 * After generating a new symbolic name string, a new RSPN_ID request is 2777 * sent to the name server. There is no response handler, so if it fails 2778 * for some reason it will not be retried. 2779 */ 2780 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) 2781 { 2782 struct fc_lport *lport = vport->dd_data; 2783 struct fc_frame *fp; 2784 size_t len; 2785 2786 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 2787 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, 2788 fcoe_netdev(lport)->name, vport->symbolic_name); 2789 2790 if (lport->state != LPORT_ST_READY) 2791 return; 2792 2793 len = strnlen(fc_host_symbolic_name(lport->host), 255); 2794 fp = fc_frame_alloc(lport, 2795 sizeof(struct fc_ct_hdr) + 2796 sizeof(struct fc_ns_rspn) + len); 2797 if (!fp) 2798 return; 2799 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, 2800 NULL, NULL, 3 * lport->r_a_tov); 2801 } 2802 2803 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev) 2804 { 2805 struct fcoe_ctlr_device *ctlr_dev = 2806 fcoe_fcf_dev_to_ctlr_dev(fcf_dev); 2807 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2808 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2809 2810 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev); 2811 } 2812 2813 /** 2814 * fcoe_set_port_id() - Callback from libfc when Port_ID is set. 2815 * @lport: the local port 2816 * @port_id: the port ID 2817 * @fp: the received frame, if any, that caused the port_id to be set. 2818 * 2819 * This routine handles the case where we received a FLOGI and are 2820 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() 2821 * so it can set the non-mapped mode and gateway address. 2822 * 2823 * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). 2824 */ 2825 static void fcoe_set_port_id(struct fc_lport *lport, 2826 u32 port_id, struct fc_frame *fp) 2827 { 2828 struct fcoe_port *port = lport_priv(lport); 2829 struct fcoe_interface *fcoe = port->priv; 2830 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2831 2832 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) 2833 fcoe_ctlr_recv_flogi(ctlr, lport, fp); 2834 } 2835