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