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 static const u8 flogi_maddr[ETH_ALEN] = FC_FCOE_FLOGI_MAC; 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 (netif_is_bond_master(netdev)) { 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 dev_uc_add(netdev, flogi_maddr); 340 if (fip->spma) 341 dev_uc_add(netdev, fip->ctl_src_addr); 342 if (fip->mode == FIP_MODE_VN2VN) { 343 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); 344 dev_mc_add(netdev, FIP_ALL_P2P_MACS); 345 } else 346 dev_mc_add(netdev, FIP_ALL_ENODE_MACS); 347 348 /* 349 * setup the receive function from ethernet driver 350 * on the ethertype for the given device 351 */ 352 fcoe->fcoe_packet_type.func = fcoe_rcv; 353 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE); 354 fcoe->fcoe_packet_type.dev = netdev; 355 dev_add_pack(&fcoe->fcoe_packet_type); 356 357 fcoe->fip_packet_type.func = fcoe_fip_recv; 358 fcoe->fip_packet_type.type = htons(ETH_P_FIP); 359 fcoe->fip_packet_type.dev = netdev; 360 dev_add_pack(&fcoe->fip_packet_type); 361 362 if (netdev != real_dev) { 363 fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv; 364 fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP); 365 fcoe->fip_vlan_packet_type.dev = real_dev; 366 dev_add_pack(&fcoe->fip_vlan_packet_type); 367 } 368 return 0; 369 } 370 371 /** 372 * fcoe_interface_create() - Create a FCoE interface on a net device 373 * @netdev: The net device to create the FCoE interface on 374 * @fip_mode: The mode to use for FIP 375 * 376 * Returns: pointer to a struct fcoe_interface or NULL on error 377 */ 378 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, 379 enum fip_mode fip_mode) 380 { 381 struct fcoe_ctlr_device *ctlr_dev; 382 struct fcoe_ctlr *ctlr; 383 struct fcoe_interface *fcoe; 384 int size; 385 int err; 386 387 if (!try_module_get(THIS_MODULE)) { 388 FCOE_NETDEV_DBG(netdev, 389 "Could not get a reference to the module\n"); 390 fcoe = ERR_PTR(-EBUSY); 391 goto out; 392 } 393 394 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface); 395 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ, 396 size); 397 if (!ctlr_dev) { 398 FCOE_DBG("Failed to add fcoe_ctlr_device\n"); 399 fcoe = ERR_PTR(-ENOMEM); 400 goto out_putmod; 401 } 402 403 ctlr = fcoe_ctlr_device_priv(ctlr_dev); 404 ctlr->cdev = ctlr_dev; 405 fcoe = fcoe_ctlr_priv(ctlr); 406 407 dev_hold(netdev); 408 409 /* 410 * Initialize FIP. 411 */ 412 fcoe_ctlr_init(ctlr, fip_mode); 413 ctlr->send = fcoe_fip_send; 414 ctlr->update_mac = fcoe_update_src_mac; 415 ctlr->get_src_addr = fcoe_get_src_mac; 416 417 err = fcoe_interface_setup(fcoe, netdev); 418 if (err) { 419 fcoe_ctlr_destroy(ctlr); 420 fcoe_ctlr_device_delete(ctlr_dev); 421 dev_put(netdev); 422 fcoe = ERR_PTR(err); 423 goto out_putmod; 424 } 425 426 goto out; 427 428 out_putmod: 429 module_put(THIS_MODULE); 430 out: 431 return fcoe; 432 } 433 434 /** 435 * fcoe_interface_remove() - remove FCoE interface from netdev 436 * @fcoe: The FCoE interface to be cleaned up 437 * 438 * Caller must be holding the RTNL mutex 439 */ 440 static void fcoe_interface_remove(struct fcoe_interface *fcoe) 441 { 442 struct net_device *netdev = fcoe->netdev; 443 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 444 static const u8 flogi_maddr[ETH_ALEN] = FC_FCOE_FLOGI_MAC; 445 const struct net_device_ops *ops; 446 447 /* 448 * Don't listen for Ethernet packets anymore. 449 * synchronize_net() ensures that the packet handlers are not running 450 * on another CPU. dev_remove_pack() would do that, this calls the 451 * unsyncronized version __dev_remove_pack() to avoid multiple delays. 452 */ 453 __dev_remove_pack(&fcoe->fcoe_packet_type); 454 __dev_remove_pack(&fcoe->fip_packet_type); 455 if (netdev != fcoe->realdev) 456 __dev_remove_pack(&fcoe->fip_vlan_packet_type); 457 synchronize_net(); 458 459 /* Delete secondary MAC addresses */ 460 dev_uc_del(netdev, flogi_maddr); 461 if (fip->spma) 462 dev_uc_del(netdev, fip->ctl_src_addr); 463 if (fip->mode == FIP_MODE_VN2VN) { 464 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); 465 dev_mc_del(netdev, FIP_ALL_P2P_MACS); 466 } else 467 dev_mc_del(netdev, FIP_ALL_ENODE_MACS); 468 469 /* Tell the LLD we are done w/ FCoE */ 470 ops = netdev->netdev_ops; 471 if (ops->ndo_fcoe_disable) { 472 if (ops->ndo_fcoe_disable(netdev)) 473 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" 474 " specific feature for LLD.\n"); 475 } 476 fcoe->removed = 1; 477 } 478 479 480 /** 481 * fcoe_interface_cleanup() - Clean up a FCoE interface 482 * @fcoe: The FCoE interface to be cleaned up 483 */ 484 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) 485 { 486 struct net_device *netdev = fcoe->netdev; 487 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 488 489 /* Release the self-reference taken during fcoe_interface_create() */ 490 /* tear-down the FCoE controller */ 491 fcoe_ctlr_destroy(fip); 492 scsi_host_put(fip->lp->host); 493 dev_put(netdev); 494 module_put(THIS_MODULE); 495 } 496 497 /** 498 * fcoe_fip_recv() - Handler for received FIP frames 499 * @skb: The receive skb 500 * @netdev: The associated net device 501 * @ptype: The packet_type structure which was used to register this handler 502 * @orig_dev: The original net_device the skb was received on. 503 * (in case dev is a bond) 504 * 505 * Returns: 0 for success 506 */ 507 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, 508 struct packet_type *ptype, 509 struct net_device *orig_dev) 510 { 511 struct fcoe_interface *fcoe; 512 struct fcoe_ctlr *ctlr; 513 514 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); 515 ctlr = fcoe_to_ctlr(fcoe); 516 fcoe_ctlr_recv(ctlr, skb); 517 return 0; 518 } 519 520 /** 521 * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames 522 * @skb: The receive skb 523 * @netdev: The associated net device 524 * @ptype: The packet_type structure which was used to register this handler 525 * @orig_dev: The original net_device the skb was received on. 526 * (in case dev is a bond) 527 * 528 * Returns: 0 for success 529 */ 530 static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev, 531 struct packet_type *ptype, 532 struct net_device *orig_dev) 533 { 534 struct fcoe_interface *fcoe; 535 struct fcoe_ctlr *ctlr; 536 537 fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type); 538 ctlr = fcoe_to_ctlr(fcoe); 539 fcoe_ctlr_recv(ctlr, skb); 540 return 0; 541 } 542 543 /** 544 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame 545 * @port: The FCoE port 546 * @skb: The FIP/FCoE packet to be sent 547 */ 548 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb) 549 { 550 if (port->fcoe_pending_queue.qlen) 551 fcoe_check_wait_queue(port->lport, skb); 552 else if (fcoe_start_io(skb)) 553 fcoe_check_wait_queue(port->lport, skb); 554 } 555 556 /** 557 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame 558 * @fip: The FCoE controller 559 * @skb: The FIP packet to be sent 560 */ 561 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 562 { 563 struct fcoe_interface *fcoe = fcoe_from_ctlr(fip); 564 struct fip_frame { 565 struct ethhdr eth; 566 struct fip_header fip; 567 } __packed *frame; 568 569 /* 570 * Use default VLAN for FIP VLAN discovery protocol 571 */ 572 frame = (struct fip_frame *)skb->data; 573 if (ntohs(frame->eth.h_proto) == ETH_P_FIP && 574 ntohs(frame->fip.fip_op) == FIP_OP_VLAN && 575 fcoe->realdev != fcoe->netdev) 576 skb->dev = fcoe->realdev; 577 else 578 skb->dev = fcoe->netdev; 579 fcoe_port_send(lport_priv(fip->lp), skb); 580 } 581 582 /** 583 * fcoe_update_src_mac() - Update the Ethernet MAC filters 584 * @lport: The local port to update the source MAC on 585 * @addr: Unicast MAC address to add 586 * 587 * Remove any previously-set unicast MAC filter. 588 * Add secondary FCoE MAC address filter for our OUI. 589 */ 590 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) 591 { 592 struct fcoe_port *port = lport_priv(lport); 593 struct fcoe_interface *fcoe = port->priv; 594 595 if (!is_zero_ether_addr(port->data_src_addr)) 596 dev_uc_del(fcoe->netdev, port->data_src_addr); 597 if (!is_zero_ether_addr(addr)) 598 dev_uc_add(fcoe->netdev, addr); 599 memcpy(port->data_src_addr, addr, ETH_ALEN); 600 } 601 602 /** 603 * fcoe_get_src_mac() - return the Ethernet source address for an lport 604 * @lport: libfc lport 605 */ 606 static u8 *fcoe_get_src_mac(struct fc_lport *lport) 607 { 608 struct fcoe_port *port = lport_priv(lport); 609 610 return port->data_src_addr; 611 } 612 613 /** 614 * fcoe_lport_config() - Set up a local port 615 * @lport: The local port to be setup 616 * 617 * Returns: 0 for success 618 */ 619 static int fcoe_lport_config(struct fc_lport *lport) 620 { 621 lport->link_up = 0; 622 lport->qfull = 0; 623 lport->max_retry_count = 3; 624 lport->max_rport_retry_count = 3; 625 lport->e_d_tov = fcoe_e_d_tov; 626 lport->r_a_tov = fcoe_r_a_tov; 627 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 628 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); 629 lport->does_npiv = 1; 630 631 fc_lport_init_stats(lport); 632 633 /* lport fc_lport related configuration */ 634 fc_lport_config(lport); 635 636 /* offload related configuration */ 637 lport->crc_offload = 0; 638 lport->seq_offload = 0; 639 lport->lro_enabled = 0; 640 lport->lro_xid = 0; 641 lport->lso_max = 0; 642 643 return 0; 644 } 645 646 /* 647 * fcoe_netdev_features_change - Updates the lport's offload flags based 648 * on the LLD netdev's FCoE feature flags 649 */ 650 static void fcoe_netdev_features_change(struct fc_lport *lport, 651 struct net_device *netdev) 652 { 653 mutex_lock(&lport->lp_mutex); 654 655 if (netdev->features & NETIF_F_SG) 656 lport->sg_supp = 1; 657 else 658 lport->sg_supp = 0; 659 660 if (netdev->features & NETIF_F_FCOE_CRC) { 661 lport->crc_offload = 1; 662 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); 663 } else { 664 lport->crc_offload = 0; 665 } 666 667 if (netdev->features & NETIF_F_FSO) { 668 lport->seq_offload = 1; 669 lport->lso_max = netdev->gso_max_size; 670 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", 671 lport->lso_max); 672 } else { 673 lport->seq_offload = 0; 674 lport->lso_max = 0; 675 } 676 677 if (netdev->fcoe_ddp_xid) { 678 lport->lro_enabled = 1; 679 lport->lro_xid = netdev->fcoe_ddp_xid; 680 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", 681 lport->lro_xid); 682 } else { 683 lport->lro_enabled = 0; 684 lport->lro_xid = 0; 685 } 686 687 mutex_unlock(&lport->lp_mutex); 688 } 689 690 /** 691 * fcoe_netdev_config() - Set up net devive for SW FCoE 692 * @lport: The local port that is associated with the net device 693 * @netdev: The associated net device 694 * 695 * Must be called after fcoe_lport_config() as it will use local port mutex 696 * 697 * Returns: 0 for success 698 */ 699 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) 700 { 701 u32 mfs; 702 u64 wwnn, wwpn; 703 struct fcoe_interface *fcoe; 704 struct fcoe_ctlr *ctlr; 705 struct fcoe_port *port; 706 707 /* Setup lport private data to point to fcoe softc */ 708 port = lport_priv(lport); 709 fcoe = port->priv; 710 ctlr = fcoe_to_ctlr(fcoe); 711 712 /* Figure out the VLAN ID, if any */ 713 if (is_vlan_dev(netdev)) 714 lport->vlan = vlan_dev_vlan_id(netdev); 715 else 716 lport->vlan = 0; 717 718 /* 719 * Determine max frame size based on underlying device and optional 720 * user-configured limit. If the MFS is too low, fcoe_link_ok() 721 * will return 0, so do this first. 722 */ 723 mfs = netdev->mtu; 724 if (netdev->features & NETIF_F_FCOE_MTU) { 725 mfs = FCOE_MTU; 726 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); 727 } 728 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); 729 if (fc_set_mfs(lport, mfs)) 730 return -EINVAL; 731 732 /* offload features support */ 733 fcoe_netdev_features_change(lport, netdev); 734 735 skb_queue_head_init(&port->fcoe_pending_queue); 736 port->fcoe_pending_queue_active = 0; 737 timer_setup(&port->timer, fcoe_queue_timer, 0); 738 739 fcoe_link_speed_update(lport); 740 741 if (!lport->vport) { 742 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) 743 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0); 744 fc_set_wwnn(lport, wwnn); 745 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) 746 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 747 2, 0); 748 fc_set_wwpn(lport, wwpn); 749 } 750 751 return 0; 752 } 753 754 /** 755 * fcoe_shost_config() - Set up the SCSI host associated with a local port 756 * @lport: The local port 757 * @dev: The device associated with the SCSI host 758 * 759 * Must be called after fcoe_lport_config() and fcoe_netdev_config() 760 * 761 * Returns: 0 for success 762 */ 763 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) 764 { 765 int rc = 0; 766 767 /* lport scsi host config */ 768 lport->host->max_lun = FCOE_MAX_LUN; 769 lport->host->max_id = FCOE_MAX_FCP_TARGET; 770 lport->host->max_channel = 0; 771 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; 772 773 if (lport->vport) 774 lport->host->transportt = fcoe_vport_scsi_transport; 775 else 776 lport->host->transportt = fcoe_nport_scsi_transport; 777 778 /* add the new host to the SCSI-ml */ 779 rc = scsi_add_host(lport->host, dev); 780 if (rc) { 781 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " 782 "error on scsi_add_host\n"); 783 return rc; 784 } 785 786 if (!lport->vport) 787 fc_host_max_npiv_vports(lport->host) = USHRT_MAX; 788 789 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 790 "%s v%s over %s", FCOE_NAME, FCOE_VERSION, 791 fcoe_netdev(lport)->name); 792 793 return 0; 794 } 795 796 797 /** 798 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE 799 * @lport: The local port that is associated with the net device 800 * @netdev: The associated net device 801 * 802 * Must be called after fcoe_shost_config() as it will use local port mutex 803 * 804 */ 805 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev) 806 { 807 struct fcoe_interface *fcoe; 808 struct fcoe_port *port; 809 struct net_device *realdev; 810 int rc; 811 812 port = lport_priv(lport); 813 fcoe = port->priv; 814 realdev = fcoe->realdev; 815 816 /* No FDMI state m/c for NPIV ports */ 817 if (lport->vport) 818 return; 819 820 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) { 821 struct netdev_fcoe_hbainfo *fdmi; 822 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL); 823 if (!fdmi) 824 return; 825 826 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev, 827 fdmi); 828 if (rc) { 829 printk(KERN_INFO "fcoe: Failed to retrieve FDMI " 830 "information from netdev.\n"); 831 return; 832 } 833 834 snprintf(fc_host_serial_number(lport->host), 835 FC_SERIAL_NUMBER_SIZE, 836 "%s", 837 fdmi->serial_number); 838 snprintf(fc_host_manufacturer(lport->host), 839 FC_SERIAL_NUMBER_SIZE, 840 "%s", 841 fdmi->manufacturer); 842 snprintf(fc_host_model(lport->host), 843 FC_SYMBOLIC_NAME_SIZE, 844 "%s", 845 fdmi->model); 846 snprintf(fc_host_model_description(lport->host), 847 FC_SYMBOLIC_NAME_SIZE, 848 "%s", 849 fdmi->model_description); 850 snprintf(fc_host_hardware_version(lport->host), 851 FC_VERSION_STRING_SIZE, 852 "%s", 853 fdmi->hardware_version); 854 snprintf(fc_host_driver_version(lport->host), 855 FC_VERSION_STRING_SIZE, 856 "%s", 857 fdmi->driver_version); 858 snprintf(fc_host_optionrom_version(lport->host), 859 FC_VERSION_STRING_SIZE, 860 "%s", 861 fdmi->optionrom_version); 862 snprintf(fc_host_firmware_version(lport->host), 863 FC_VERSION_STRING_SIZE, 864 "%s", 865 fdmi->firmware_version); 866 867 /* Enable FDMI lport states */ 868 lport->fdmi_enabled = 1; 869 kfree(fdmi); 870 } else { 871 lport->fdmi_enabled = 0; 872 printk(KERN_INFO "fcoe: No FDMI support.\n"); 873 } 874 } 875 876 /** 877 * fcoe_oem_match() - The match routine for the offloaded exchange manager 878 * @fp: The I/O frame 879 * 880 * This routine will be associated with an exchange manager (EM). When 881 * the libfc exchange handling code is looking for an EM to use it will 882 * call this routine and pass it the frame that it wishes to send. This 883 * routine will return True if the associated EM is to be used and False 884 * if the echange code should continue looking for an EM. 885 * 886 * The offload EM that this routine is associated with will handle any 887 * packets that are for SCSI read requests. 888 * 889 * This has been enhanced to work when FCoE stack is operating in target 890 * mode. 891 * 892 * Returns: True for read types I/O, otherwise returns false. 893 */ 894 static bool fcoe_oem_match(struct fc_frame *fp) 895 { 896 struct fc_frame_header *fh = fc_frame_header_get(fp); 897 struct fcp_cmnd *fcp; 898 899 if (fc_fcp_is_read(fr_fsp(fp)) && 900 (fr_fsp(fp)->data_len > fcoe_ddp_min)) 901 return true; 902 else if ((fr_fsp(fp) == NULL) && 903 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) && 904 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) { 905 fcp = fc_frame_payload_get(fp, sizeof(*fcp)); 906 if ((fcp->fc_flags & FCP_CFL_WRDATA) && 907 (ntohl(fcp->fc_dl) > fcoe_ddp_min)) 908 return true; 909 } 910 return false; 911 } 912 913 /** 914 * fcoe_em_config() - Allocate and configure an exchange manager 915 * @lport: The local port that the new EM will be associated with 916 * 917 * Returns: 0 on success 918 */ 919 static inline int fcoe_em_config(struct fc_lport *lport) 920 { 921 struct fcoe_port *port = lport_priv(lport); 922 struct fcoe_interface *fcoe = port->priv; 923 struct fcoe_interface *oldfcoe = NULL; 924 struct net_device *old_real_dev, *cur_real_dev; 925 u16 min_xid = FCOE_MIN_XID; 926 u16 max_xid = FCOE_MAX_XID; 927 928 /* 929 * Check if need to allocate an em instance for 930 * offload exchange ids to be shared across all VN_PORTs/lport. 931 */ 932 if (!lport->lro_enabled || !lport->lro_xid || 933 (lport->lro_xid >= max_xid)) { 934 lport->lro_xid = 0; 935 goto skip_oem; 936 } 937 938 /* 939 * Reuse existing offload em instance in case 940 * it is already allocated on real eth device 941 */ 942 if (is_vlan_dev(fcoe->netdev)) 943 cur_real_dev = vlan_dev_real_dev(fcoe->netdev); 944 else 945 cur_real_dev = fcoe->netdev; 946 947 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { 948 if (is_vlan_dev(oldfcoe->netdev)) 949 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); 950 else 951 old_real_dev = oldfcoe->netdev; 952 953 if (cur_real_dev == old_real_dev) { 954 fcoe->oem = oldfcoe->oem; 955 break; 956 } 957 } 958 959 if (fcoe->oem) { 960 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { 961 printk(KERN_ERR "fcoe_em_config: failed to add " 962 "offload em:%p on interface:%s\n", 963 fcoe->oem, fcoe->netdev->name); 964 return -ENOMEM; 965 } 966 } else { 967 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, 968 FCOE_MIN_XID, lport->lro_xid, 969 fcoe_oem_match); 970 if (!fcoe->oem) { 971 printk(KERN_ERR "fcoe_em_config: failed to allocate " 972 "em for offload exches on interface:%s\n", 973 fcoe->netdev->name); 974 return -ENOMEM; 975 } 976 } 977 978 /* 979 * Exclude offload EM xid range from next EM xid range. 980 */ 981 min_xid += lport->lro_xid + 1; 982 983 skip_oem: 984 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { 985 printk(KERN_ERR "fcoe_em_config: failed to " 986 "allocate em on interface %s\n", fcoe->netdev->name); 987 return -ENOMEM; 988 } 989 990 return 0; 991 } 992 993 /** 994 * fcoe_if_destroy() - Tear down a SW FCoE instance 995 * @lport: The local port to be destroyed 996 * 997 * Locking: Must be called with the RTNL mutex held. 998 * 999 */ 1000 static void fcoe_if_destroy(struct fc_lport *lport) 1001 { 1002 struct fcoe_port *port = lport_priv(lport); 1003 struct fcoe_interface *fcoe = port->priv; 1004 struct net_device *netdev = fcoe->netdev; 1005 1006 FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); 1007 1008 /* Logout of the fabric */ 1009 fc_fabric_logoff(lport); 1010 1011 /* Cleanup the fc_lport */ 1012 fc_lport_destroy(lport); 1013 1014 /* Stop the transmit retry timer */ 1015 del_timer_sync(&port->timer); 1016 1017 /* Free existing transmit skbs */ 1018 fcoe_clean_pending_queue(lport); 1019 1020 if (!is_zero_ether_addr(port->data_src_addr)) 1021 dev_uc_del(netdev, port->data_src_addr); 1022 if (lport->vport) 1023 synchronize_net(); 1024 else 1025 fcoe_interface_remove(fcoe); 1026 1027 /* Free queued packets for the per-CPU receive threads */ 1028 fcoe_percpu_clean(lport); 1029 1030 /* Detach from the scsi-ml */ 1031 fc_remove_host(lport->host); 1032 scsi_remove_host(lport->host); 1033 1034 /* Destroy lport scsi_priv */ 1035 fc_fcp_destroy(lport); 1036 1037 /* There are no more rports or I/O, free the EM */ 1038 fc_exch_mgr_free(lport); 1039 1040 /* Free memory used by statistical counters */ 1041 fc_lport_free_stats(lport); 1042 1043 /* 1044 * Release the Scsi_Host for vport but hold on to 1045 * master lport until it fcoe interface fully cleaned-up. 1046 */ 1047 if (lport->vport) 1048 scsi_host_put(lport->host); 1049 } 1050 1051 /** 1052 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device 1053 * @lport: The local port to setup DDP for 1054 * @xid: The exchange ID for this DDP transfer 1055 * @sgl: The scatterlist describing this transfer 1056 * @sgc: The number of sg items 1057 * 1058 * Returns: 0 if the DDP context was not configured 1059 */ 1060 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, 1061 struct scatterlist *sgl, unsigned int sgc) 1062 { 1063 struct net_device *netdev = fcoe_netdev(lport); 1064 1065 if (netdev->netdev_ops->ndo_fcoe_ddp_setup) 1066 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, 1067 xid, sgl, 1068 sgc); 1069 1070 return 0; 1071 } 1072 1073 /** 1074 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device 1075 * @lport: The local port to setup DDP for 1076 * @xid: The exchange ID for this DDP transfer 1077 * @sgl: The scatterlist describing this transfer 1078 * @sgc: The number of sg items 1079 * 1080 * Returns: 0 if the DDP context was not configured 1081 */ 1082 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, 1083 struct scatterlist *sgl, unsigned int sgc) 1084 { 1085 struct net_device *netdev = fcoe_netdev(lport); 1086 1087 if (netdev->netdev_ops->ndo_fcoe_ddp_target) 1088 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, 1089 sgl, sgc); 1090 1091 return 0; 1092 } 1093 1094 1095 /** 1096 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device 1097 * @lport: The local port to complete DDP on 1098 * @xid: The exchange ID for this DDP transfer 1099 * 1100 * Returns: the length of data that have been completed by DDP 1101 */ 1102 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) 1103 { 1104 struct net_device *netdev = fcoe_netdev(lport); 1105 1106 if (netdev->netdev_ops->ndo_fcoe_ddp_done) 1107 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); 1108 return 0; 1109 } 1110 1111 /** 1112 * fcoe_if_create() - Create a FCoE instance on an interface 1113 * @fcoe: The FCoE interface to create a local port on 1114 * @parent: The device pointer to be the parent in sysfs for the SCSI host 1115 * @npiv: Indicates if the port is a vport or not 1116 * 1117 * Creates a fc_lport instance and a Scsi_Host instance and configure them. 1118 * 1119 * Returns: The allocated fc_lport or an error pointer 1120 */ 1121 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, 1122 struct device *parent, int npiv) 1123 { 1124 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1125 struct net_device *netdev = fcoe->netdev; 1126 struct fc_lport *lport, *n_port; 1127 struct fcoe_port *port; 1128 struct Scsi_Host *shost; 1129 int rc; 1130 /* 1131 * parent is only a vport if npiv is 1, 1132 * but we'll only use vport in that case so go ahead and set it 1133 */ 1134 struct fc_vport *vport = dev_to_vport(parent); 1135 1136 FCOE_NETDEV_DBG(netdev, "Create Interface\n"); 1137 1138 if (!npiv) 1139 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); 1140 else 1141 lport = libfc_vport_create(vport, sizeof(*port)); 1142 1143 if (!lport) { 1144 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); 1145 rc = -ENOMEM; 1146 goto out; 1147 } 1148 port = lport_priv(lport); 1149 port->lport = lport; 1150 port->priv = fcoe; 1151 port->get_netdev = fcoe_netdev; 1152 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; 1153 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; 1154 INIT_WORK(&port->destroy_work, fcoe_destroy_work); 1155 1156 /* 1157 * Need to add the lport to the hostlist 1158 * so we catch NETDEV_CHANGE events. 1159 */ 1160 fcoe_hostlist_add(lport); 1161 1162 /* configure a fc_lport including the exchange manager */ 1163 rc = fcoe_lport_config(lport); 1164 if (rc) { 1165 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " 1166 "interface\n"); 1167 goto out_host_put; 1168 } 1169 1170 if (npiv) { 1171 FCOE_NETDEV_DBG(netdev, "Setting vport names, " 1172 "%16.16llx %16.16llx\n", 1173 vport->node_name, vport->port_name); 1174 fc_set_wwnn(lport, vport->node_name); 1175 fc_set_wwpn(lport, vport->port_name); 1176 } 1177 1178 /* configure lport network properties */ 1179 rc = fcoe_netdev_config(lport, netdev); 1180 if (rc) { 1181 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " 1182 "interface\n"); 1183 goto out_lp_destroy; 1184 } 1185 1186 /* configure lport scsi host properties */ 1187 rc = fcoe_shost_config(lport, parent); 1188 if (rc) { 1189 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " 1190 "interface\n"); 1191 goto out_lp_destroy; 1192 } 1193 1194 /* Initialize the library */ 1195 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1); 1196 if (rc) { 1197 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " 1198 "interface\n"); 1199 goto out_lp_destroy; 1200 } 1201 1202 /* Initialized FDMI information */ 1203 fcoe_fdmi_info(lport, netdev); 1204 1205 /* 1206 * fcoe_em_alloc() and fcoe_hostlist_add() both 1207 * need to be atomic with respect to other changes to the 1208 * hostlist since fcoe_em_alloc() looks for an existing EM 1209 * instance on host list updated by fcoe_hostlist_add(). 1210 * 1211 * This is currently handled through the fcoe_config_mutex 1212 * begin held. 1213 */ 1214 if (!npiv) 1215 /* lport exch manager allocation */ 1216 rc = fcoe_em_config(lport); 1217 else { 1218 shost = vport_to_shost(vport); 1219 n_port = shost_priv(shost); 1220 rc = fc_exch_mgr_list_clone(n_port, lport); 1221 } 1222 1223 if (rc) { 1224 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); 1225 goto out_lp_destroy; 1226 } 1227 1228 return lport; 1229 1230 out_lp_destroy: 1231 fc_exch_mgr_free(lport); 1232 out_host_put: 1233 fcoe_hostlist_del(lport); 1234 scsi_host_put(lport->host); 1235 out: 1236 return ERR_PTR(rc); 1237 } 1238 1239 /** 1240 * fcoe_if_init() - Initialization routine for fcoe.ko 1241 * 1242 * Attaches the SW FCoE transport to the FC transport 1243 * 1244 * Returns: 0 on success 1245 */ 1246 static int __init fcoe_if_init(void) 1247 { 1248 /* attach to scsi transport */ 1249 fcoe_nport_scsi_transport = 1250 fc_attach_transport(&fcoe_nport_fc_functions); 1251 if (!fcoe_nport_scsi_transport) 1252 goto err; 1253 1254 fcoe_vport_scsi_transport = 1255 fc_attach_transport(&fcoe_vport_fc_functions); 1256 if (!fcoe_vport_scsi_transport) 1257 goto err_vport; 1258 1259 return 0; 1260 1261 err_vport: 1262 fc_release_transport(fcoe_nport_scsi_transport); 1263 err: 1264 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); 1265 return -ENODEV; 1266 } 1267 1268 /** 1269 * fcoe_if_exit() - Tear down fcoe.ko 1270 * 1271 * Detaches the SW FCoE transport from the FC transport 1272 * 1273 * Returns: 0 on success 1274 */ 1275 static int __exit fcoe_if_exit(void) 1276 { 1277 fc_release_transport(fcoe_nport_scsi_transport); 1278 fc_release_transport(fcoe_vport_scsi_transport); 1279 fcoe_nport_scsi_transport = NULL; 1280 fcoe_vport_scsi_transport = NULL; 1281 return 0; 1282 } 1283 1284 static void fcoe_thread_cleanup_local(unsigned int cpu) 1285 { 1286 struct page *crc_eof; 1287 struct fcoe_percpu_s *p; 1288 1289 p = per_cpu_ptr(&fcoe_percpu, cpu); 1290 spin_lock_bh(&p->fcoe_rx_list.lock); 1291 crc_eof = p->crc_eof_page; 1292 p->crc_eof_page = NULL; 1293 p->crc_eof_offset = 0; 1294 spin_unlock_bh(&p->fcoe_rx_list.lock); 1295 1296 if (crc_eof) 1297 put_page(crc_eof); 1298 flush_work(&p->work); 1299 } 1300 1301 /** 1302 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming 1303 * command. 1304 * 1305 * This routine selects next CPU based on cpumask to distribute 1306 * incoming requests in round robin. 1307 * 1308 * Returns: int CPU number 1309 */ 1310 static inline unsigned int fcoe_select_cpu(void) 1311 { 1312 static unsigned int selected_cpu; 1313 1314 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask); 1315 if (selected_cpu >= nr_cpu_ids) 1316 selected_cpu = cpumask_first(cpu_online_mask); 1317 1318 return selected_cpu; 1319 } 1320 1321 /** 1322 * fcoe_rcv() - Receive packets from a net device 1323 * @skb: The received packet 1324 * @netdev: The net device that the packet was received on 1325 * @ptype: The packet type context 1326 * @olddev: The last device net device 1327 * 1328 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a 1329 * FC frame and passes the frame to libfc. 1330 * 1331 * Returns: 0 for success 1332 */ 1333 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, 1334 struct packet_type *ptype, struct net_device *olddev) 1335 { 1336 struct fc_lport *lport; 1337 struct fcoe_rcv_info *fr; 1338 struct fcoe_ctlr *ctlr; 1339 struct fcoe_interface *fcoe; 1340 struct fc_frame_header *fh; 1341 struct fcoe_percpu_s *fps; 1342 struct ethhdr *eh; 1343 unsigned int cpu; 1344 1345 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); 1346 ctlr = fcoe_to_ctlr(fcoe); 1347 lport = ctlr->lp; 1348 if (unlikely(!lport)) { 1349 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n"); 1350 goto err2; 1351 } 1352 if (!lport->link_up) 1353 goto err2; 1354 1355 FCOE_NETDEV_DBG(netdev, 1356 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1357 skb->len, skb->data_len, skb->head, skb->data, 1358 skb_tail_pointer(skb), skb_end_pointer(skb), 1359 skb->csum, skb->dev ? skb->dev->name : "<NULL>"); 1360 1361 1362 skb = skb_share_check(skb, GFP_ATOMIC); 1363 1364 if (skb == NULL) 1365 return NET_RX_DROP; 1366 1367 eh = eth_hdr(skb); 1368 1369 if (is_fip_mode(ctlr) && 1370 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) { 1371 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", 1372 eh->h_source); 1373 goto err; 1374 } 1375 1376 /* 1377 * Check for minimum frame length, and make sure required FCoE 1378 * and FC headers are pulled into the linear data area. 1379 */ 1380 if (unlikely((skb->len < FCOE_MIN_FRAME) || 1381 !pskb_may_pull(skb, FCOE_HEADER_LEN))) 1382 goto err; 1383 1384 skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); 1385 fh = (struct fc_frame_header *) skb_transport_header(skb); 1386 1387 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { 1388 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", 1389 eh->h_dest); 1390 goto err; 1391 } 1392 1393 fr = fcoe_dev_from_skb(skb); 1394 fr->fr_dev = lport; 1395 1396 /* 1397 * In case the incoming frame's exchange is originated from 1398 * the initiator, then received frame's exchange id is ANDed 1399 * with fc_cpu_mask bits to get the same cpu on which exchange 1400 * was originated, otherwise select cpu using rx exchange id 1401 * or fcoe_select_cpu(). 1402 */ 1403 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) 1404 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; 1405 else { 1406 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN) 1407 cpu = fcoe_select_cpu(); 1408 else 1409 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; 1410 } 1411 1412 if (cpu >= nr_cpu_ids) 1413 goto err; 1414 1415 fps = &per_cpu(fcoe_percpu, cpu); 1416 spin_lock(&fps->fcoe_rx_list.lock); 1417 /* 1418 * We now have a valid CPU that we're targeting for 1419 * this skb. We also have this receive thread locked, 1420 * so we're free to queue skbs into it's queue. 1421 */ 1422 1423 /* 1424 * Note: We used to have a set of conditions under which we would 1425 * call fcoe_recv_frame directly, rather than queuing to the rx list 1426 * as it could save a few cycles, but doing so is prohibited, as 1427 * fcoe_recv_frame has several paths that may sleep, which is forbidden 1428 * in softirq context. 1429 */ 1430 __skb_queue_tail(&fps->fcoe_rx_list, skb); 1431 schedule_work_on(cpu, &fps->work); 1432 spin_unlock(&fps->fcoe_rx_list.lock); 1433 1434 return NET_RX_SUCCESS; 1435 err: 1436 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++; 1437 put_cpu(); 1438 err2: 1439 kfree_skb(skb); 1440 return NET_RX_DROP; 1441 } 1442 1443 /** 1444 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC 1445 * @skb: The packet to be transmitted 1446 * @tlen: The total length of the trailer 1447 * 1448 * Returns: 0 for success 1449 */ 1450 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) 1451 { 1452 struct fcoe_percpu_s *fps; 1453 int rc; 1454 1455 fps = &get_cpu_var(fcoe_percpu); 1456 rc = fcoe_get_paged_crc_eof(skb, tlen, fps); 1457 put_cpu_var(fcoe_percpu); 1458 1459 return rc; 1460 } 1461 1462 /** 1463 * fcoe_xmit() - Transmit a FCoE frame 1464 * @lport: The local port that the frame is to be transmitted for 1465 * @fp: The frame to be transmitted 1466 * 1467 * Return: 0 for success 1468 */ 1469 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) 1470 { 1471 int wlen; 1472 u32 crc; 1473 struct ethhdr *eh; 1474 struct fcoe_crc_eof *cp; 1475 struct sk_buff *skb; 1476 struct fc_stats *stats; 1477 struct fc_frame_header *fh; 1478 unsigned int hlen; /* header length implies the version */ 1479 unsigned int tlen; /* trailer length */ 1480 unsigned int elen; /* eth header, may include vlan */ 1481 struct fcoe_port *port = lport_priv(lport); 1482 struct fcoe_interface *fcoe = port->priv; 1483 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1484 u8 sof, eof; 1485 struct fcoe_hdr *hp; 1486 1487 WARN_ON((fr_len(fp) % sizeof(u32)) != 0); 1488 1489 fh = fc_frame_header_get(fp); 1490 skb = fp_skb(fp); 1491 wlen = skb->len / FCOE_WORD_TO_BYTE; 1492 1493 if (!lport->link_up) { 1494 kfree_skb(skb); 1495 return 0; 1496 } 1497 1498 if (unlikely(fh->fh_type == FC_TYPE_ELS) && 1499 fcoe_ctlr_els_send(ctlr, lport, skb)) 1500 return 0; 1501 1502 sof = fr_sof(fp); 1503 eof = fr_eof(fp); 1504 1505 elen = sizeof(struct ethhdr); 1506 hlen = sizeof(struct fcoe_hdr); 1507 tlen = sizeof(struct fcoe_crc_eof); 1508 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; 1509 1510 /* crc offload */ 1511 if (likely(lport->crc_offload)) { 1512 skb->ip_summed = CHECKSUM_PARTIAL; 1513 skb->csum_start = skb_headroom(skb); 1514 skb->csum_offset = skb->len; 1515 crc = 0; 1516 } else { 1517 skb->ip_summed = CHECKSUM_NONE; 1518 crc = fcoe_fc_crc(fp); 1519 } 1520 1521 /* copy port crc and eof to the skb buff */ 1522 if (skb_is_nonlinear(skb)) { 1523 skb_frag_t *frag; 1524 if (fcoe_alloc_paged_crc_eof(skb, tlen)) { 1525 kfree_skb(skb); 1526 return -ENOMEM; 1527 } 1528 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; 1529 cp = kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag); 1530 } else { 1531 cp = skb_put(skb, tlen); 1532 } 1533 1534 memset(cp, 0, sizeof(*cp)); 1535 cp->fcoe_eof = eof; 1536 cp->fcoe_crc32 = cpu_to_le32(~crc); 1537 1538 if (skb_is_nonlinear(skb)) { 1539 kunmap_atomic(cp); 1540 cp = NULL; 1541 } 1542 1543 /* adjust skb network/transport offsets to match mac/fcoe/port */ 1544 skb_push(skb, elen + hlen); 1545 skb_reset_mac_header(skb); 1546 skb_reset_network_header(skb); 1547 skb->mac_len = elen; 1548 skb->protocol = htons(ETH_P_FCOE); 1549 skb->priority = fcoe->priority; 1550 1551 if (is_vlan_dev(fcoe->netdev) && 1552 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) { 1553 /* must set skb->dev before calling vlan_put_tag */ 1554 skb->dev = fcoe->realdev; 1555 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1556 vlan_dev_vlan_id(fcoe->netdev)); 1557 } else 1558 skb->dev = fcoe->netdev; 1559 1560 /* fill up mac and fcoe headers */ 1561 eh = eth_hdr(skb); 1562 eh->h_proto = htons(ETH_P_FCOE); 1563 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN); 1564 if (ctlr->map_dest) 1565 memcpy(eh->h_dest + 3, fh->fh_d_id, 3); 1566 1567 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN)) 1568 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN); 1569 else 1570 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); 1571 1572 hp = (struct fcoe_hdr *)(eh + 1); 1573 memset(hp, 0, sizeof(*hp)); 1574 if (FC_FCOE_VER) 1575 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); 1576 hp->fcoe_sof = sof; 1577 1578 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ 1579 if (lport->seq_offload && fr_max_payload(fp)) { 1580 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; 1581 skb_shinfo(skb)->gso_size = fr_max_payload(fp); 1582 } else { 1583 skb_shinfo(skb)->gso_type = 0; 1584 skb_shinfo(skb)->gso_size = 0; 1585 } 1586 /* update tx stats: regardless if LLD fails */ 1587 stats = per_cpu_ptr(lport->stats, get_cpu()); 1588 stats->TxFrames++; 1589 stats->TxWords += wlen; 1590 put_cpu(); 1591 1592 /* send down to lld */ 1593 fr_dev(fp) = lport; 1594 fcoe_port_send(port, skb); 1595 return 0; 1596 } 1597 1598 /** 1599 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC 1600 * @lport: The local port the frame was received on 1601 * @fp: The received frame 1602 * 1603 * Return: 0 on passing filtering checks 1604 */ 1605 static inline int fcoe_filter_frames(struct fc_lport *lport, 1606 struct fc_frame *fp) 1607 { 1608 struct fcoe_ctlr *ctlr; 1609 struct fcoe_interface *fcoe; 1610 struct fc_frame_header *fh; 1611 struct sk_buff *skb = (struct sk_buff *)fp; 1612 struct fc_stats *stats; 1613 1614 /* 1615 * We only check CRC if no offload is available and if it is 1616 * it's solicited data, in which case, the FCP layer would 1617 * check it during the copy. 1618 */ 1619 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) 1620 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1621 else 1622 fr_flags(fp) |= FCPHF_CRC_UNCHECKED; 1623 1624 fh = fc_frame_header_get(fp); 1625 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) 1626 return 0; 1627 1628 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; 1629 ctlr = fcoe_to_ctlr(fcoe); 1630 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && 1631 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { 1632 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); 1633 return -EINVAL; 1634 } 1635 1636 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || 1637 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { 1638 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1639 return 0; 1640 } 1641 1642 stats = per_cpu_ptr(lport->stats, get_cpu()); 1643 stats->InvalidCRCCount++; 1644 if (stats->InvalidCRCCount < 5) 1645 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); 1646 put_cpu(); 1647 return -EINVAL; 1648 } 1649 1650 /** 1651 * fcoe_recv_frame() - process a single received frame 1652 * @skb: frame to process 1653 */ 1654 static void fcoe_recv_frame(struct sk_buff *skb) 1655 { 1656 u32 fr_len; 1657 struct fc_lport *lport; 1658 struct fcoe_rcv_info *fr; 1659 struct fc_stats *stats; 1660 struct fcoe_crc_eof crc_eof; 1661 struct fc_frame *fp; 1662 struct fcoe_hdr *hp; 1663 1664 fr = fcoe_dev_from_skb(skb); 1665 lport = fr->fr_dev; 1666 if (unlikely(!lport)) { 1667 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n"); 1668 kfree_skb(skb); 1669 return; 1670 } 1671 1672 FCOE_NETDEV_DBG(skb->dev, 1673 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1674 skb->len, skb->data_len, 1675 skb->head, skb->data, skb_tail_pointer(skb), 1676 skb_end_pointer(skb), skb->csum, 1677 skb->dev ? skb->dev->name : "<NULL>"); 1678 1679 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ 1680 1681 /* 1682 * Frame length checks and setting up the header pointers 1683 * was done in fcoe_rcv already. 1684 */ 1685 hp = (struct fcoe_hdr *) skb_network_header(skb); 1686 1687 stats = per_cpu_ptr(lport->stats, get_cpu()); 1688 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { 1689 if (stats->ErrorFrames < 5) 1690 printk(KERN_WARNING "fcoe: FCoE version " 1691 "mismatch: The frame has " 1692 "version %x, but the " 1693 "initiator supports version " 1694 "%x\n", FC_FCOE_DECAPS_VER(hp), 1695 FC_FCOE_VER); 1696 goto drop; 1697 } 1698 1699 skb_pull(skb, sizeof(struct fcoe_hdr)); 1700 fr_len = skb->len - sizeof(struct fcoe_crc_eof); 1701 1702 stats->RxFrames++; 1703 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; 1704 1705 fp = (struct fc_frame *)skb; 1706 fc_frame_init(fp); 1707 fr_dev(fp) = lport; 1708 fr_sof(fp) = hp->fcoe_sof; 1709 1710 /* Copy out the CRC and EOF trailer for access */ 1711 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) 1712 goto drop; 1713 fr_eof(fp) = crc_eof.fcoe_eof; 1714 fr_crc(fp) = crc_eof.fcoe_crc32; 1715 if (pskb_trim(skb, fr_len)) 1716 goto drop; 1717 1718 if (!fcoe_filter_frames(lport, fp)) { 1719 put_cpu(); 1720 fc_exch_recv(lport, fp); 1721 return; 1722 } 1723 drop: 1724 stats->ErrorFrames++; 1725 put_cpu(); 1726 kfree_skb(skb); 1727 } 1728 1729 /** 1730 * fcoe_receive_work() - The per-CPU worker 1731 * @work: The work struct 1732 * 1733 */ 1734 static void fcoe_receive_work(struct work_struct *work) 1735 { 1736 struct fcoe_percpu_s *p; 1737 struct sk_buff *skb; 1738 struct sk_buff_head tmp; 1739 1740 p = container_of(work, struct fcoe_percpu_s, work); 1741 skb_queue_head_init(&tmp); 1742 1743 spin_lock_bh(&p->fcoe_rx_list.lock); 1744 skb_queue_splice_init(&p->fcoe_rx_list, &tmp); 1745 spin_unlock_bh(&p->fcoe_rx_list.lock); 1746 1747 if (!skb_queue_len(&tmp)) 1748 return; 1749 1750 while ((skb = __skb_dequeue(&tmp))) 1751 fcoe_recv_frame(skb); 1752 } 1753 1754 /** 1755 * fcoe_dev_setup() - Setup the link change notification interface 1756 */ 1757 static void fcoe_dev_setup(void) 1758 { 1759 register_dcbevent_notifier(&dcb_notifier); 1760 register_netdevice_notifier(&fcoe_notifier); 1761 } 1762 1763 /** 1764 * fcoe_dev_cleanup() - Cleanup the link change notification interface 1765 */ 1766 static void fcoe_dev_cleanup(void) 1767 { 1768 unregister_dcbevent_notifier(&dcb_notifier); 1769 unregister_netdevice_notifier(&fcoe_notifier); 1770 } 1771 1772 static struct fcoe_interface * 1773 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev) 1774 { 1775 struct fcoe_interface *fcoe; 1776 struct net_device *real_dev; 1777 1778 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1779 if (is_vlan_dev(fcoe->netdev)) 1780 real_dev = vlan_dev_real_dev(fcoe->netdev); 1781 else 1782 real_dev = fcoe->netdev; 1783 1784 if (netdev == real_dev) 1785 return fcoe; 1786 } 1787 return NULL; 1788 } 1789 1790 static int fcoe_dcb_app_notification(struct notifier_block *notifier, 1791 ulong event, void *ptr) 1792 { 1793 struct dcb_app_type *entry = ptr; 1794 struct fcoe_ctlr *ctlr; 1795 struct fcoe_interface *fcoe; 1796 struct net_device *netdev; 1797 int prio; 1798 1799 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE) 1800 return NOTIFY_OK; 1801 1802 netdev = dev_get_by_index(&init_net, entry->ifindex); 1803 if (!netdev) 1804 return NOTIFY_OK; 1805 1806 fcoe = fcoe_hostlist_lookup_realdev_port(netdev); 1807 dev_put(netdev); 1808 if (!fcoe) 1809 return NOTIFY_OK; 1810 1811 ctlr = fcoe_to_ctlr(fcoe); 1812 1813 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE) 1814 prio = ffs(entry->app.priority) - 1; 1815 else 1816 prio = entry->app.priority; 1817 1818 if (prio < 0) 1819 return NOTIFY_OK; 1820 1821 if (entry->app.protocol == ETH_P_FIP || 1822 entry->app.protocol == ETH_P_FCOE) 1823 ctlr->priority = prio; 1824 1825 if (entry->app.protocol == ETH_P_FCOE) 1826 fcoe->priority = prio; 1827 1828 return NOTIFY_OK; 1829 } 1830 1831 /** 1832 * fcoe_device_notification() - Handler for net device events 1833 * @notifier: The context of the notification 1834 * @event: The type of event 1835 * @ptr: The net device that the event was on 1836 * 1837 * This function is called by the Ethernet driver in case of link change event. 1838 * 1839 * Returns: 0 for success 1840 */ 1841 static int fcoe_device_notification(struct notifier_block *notifier, 1842 ulong event, void *ptr) 1843 { 1844 struct fcoe_ctlr_device *cdev; 1845 struct fc_lport *lport = NULL; 1846 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 1847 struct fcoe_ctlr *ctlr; 1848 struct fcoe_interface *fcoe; 1849 struct fc_stats *stats; 1850 u32 link_possible = 1; 1851 u32 mfs; 1852 int rc = NOTIFY_OK; 1853 1854 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1855 if (fcoe->netdev == netdev) { 1856 ctlr = fcoe_to_ctlr(fcoe); 1857 lport = ctlr->lp; 1858 break; 1859 } 1860 } 1861 if (!lport) { 1862 rc = NOTIFY_DONE; 1863 goto out; 1864 } 1865 1866 switch (event) { 1867 case NETDEV_DOWN: 1868 case NETDEV_GOING_DOWN: 1869 link_possible = 0; 1870 break; 1871 case NETDEV_UP: 1872 case NETDEV_CHANGE: 1873 break; 1874 case NETDEV_CHANGEMTU: 1875 if (netdev->features & NETIF_F_FCOE_MTU) 1876 break; 1877 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + 1878 sizeof(struct fcoe_crc_eof)); 1879 if (mfs >= FC_MIN_MAX_FRAME) 1880 fc_set_mfs(lport, mfs); 1881 break; 1882 case NETDEV_REGISTER: 1883 break; 1884 case NETDEV_UNREGISTER: 1885 list_del(&fcoe->list); 1886 fcoe_vport_remove(lport); 1887 mutex_lock(&fcoe_config_mutex); 1888 fcoe_if_destroy(lport); 1889 if (!fcoe->removed) 1890 fcoe_interface_remove(fcoe); 1891 fcoe_interface_cleanup(fcoe); 1892 mutex_unlock(&fcoe_config_mutex); 1893 fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr)); 1894 goto out; 1895 case NETDEV_FEAT_CHANGE: 1896 fcoe_netdev_features_change(lport, netdev); 1897 break; 1898 default: 1899 FCOE_NETDEV_DBG(netdev, "Unknown event %ld " 1900 "from netdev netlink\n", event); 1901 } 1902 1903 fcoe_link_speed_update(lport); 1904 1905 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 1906 1907 if (link_possible && !fcoe_link_ok(lport)) { 1908 switch (cdev->enabled) { 1909 case FCOE_CTLR_DISABLED: 1910 pr_info("Link up while interface is disabled.\n"); 1911 break; 1912 case FCOE_CTLR_ENABLED: 1913 case FCOE_CTLR_UNUSED: 1914 fcoe_ctlr_link_up(ctlr); 1915 } 1916 } else if (fcoe_ctlr_link_down(ctlr)) { 1917 switch (cdev->enabled) { 1918 case FCOE_CTLR_DISABLED: 1919 pr_info("Link down while interface is disabled.\n"); 1920 break; 1921 case FCOE_CTLR_ENABLED: 1922 case FCOE_CTLR_UNUSED: 1923 stats = per_cpu_ptr(lport->stats, get_cpu()); 1924 stats->LinkFailureCount++; 1925 put_cpu(); 1926 fcoe_clean_pending_queue(lport); 1927 } 1928 } 1929 out: 1930 return rc; 1931 } 1932 1933 /** 1934 * fcoe_disable() - Disables a FCoE interface 1935 * @netdev : The net_device object the Ethernet interface to create on 1936 * 1937 * Called from fcoe transport. 1938 * 1939 * Returns: 0 for success 1940 * 1941 * Deprecated: use fcoe_ctlr_enabled() 1942 */ 1943 static int fcoe_disable(struct net_device *netdev) 1944 { 1945 struct fcoe_ctlr *ctlr; 1946 struct fcoe_interface *fcoe; 1947 int rc = 0; 1948 1949 mutex_lock(&fcoe_config_mutex); 1950 1951 rtnl_lock(); 1952 fcoe = fcoe_hostlist_lookup_port(netdev); 1953 rtnl_unlock(); 1954 1955 if (fcoe) { 1956 ctlr = fcoe_to_ctlr(fcoe); 1957 fcoe_ctlr_link_down(ctlr); 1958 fcoe_clean_pending_queue(ctlr->lp); 1959 } else 1960 rc = -ENODEV; 1961 1962 mutex_unlock(&fcoe_config_mutex); 1963 return rc; 1964 } 1965 1966 /** 1967 * fcoe_enable() - Enables a FCoE interface 1968 * @netdev : The net_device object the Ethernet interface to create on 1969 * 1970 * Called from fcoe transport. 1971 * 1972 * Returns: 0 for success 1973 */ 1974 static int fcoe_enable(struct net_device *netdev) 1975 { 1976 struct fcoe_ctlr *ctlr; 1977 struct fcoe_interface *fcoe; 1978 int rc = 0; 1979 1980 mutex_lock(&fcoe_config_mutex); 1981 rtnl_lock(); 1982 fcoe = fcoe_hostlist_lookup_port(netdev); 1983 rtnl_unlock(); 1984 1985 if (!fcoe) { 1986 rc = -ENODEV; 1987 goto out; 1988 } 1989 1990 ctlr = fcoe_to_ctlr(fcoe); 1991 1992 if (!fcoe_link_ok(ctlr->lp)) 1993 fcoe_ctlr_link_up(ctlr); 1994 1995 out: 1996 mutex_unlock(&fcoe_config_mutex); 1997 return rc; 1998 } 1999 2000 /** 2001 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller 2002 * @cdev: The FCoE Controller that is being enabled or disabled 2003 * 2004 * fcoe_sysfs will ensure that the state of 'enabled' has 2005 * changed, so no checking is necessary here. This routine simply 2006 * calls fcoe_enable or fcoe_disable, both of which are deprecated. 2007 * When those routines are removed the functionality can be merged 2008 * here. 2009 */ 2010 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev) 2011 { 2012 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev); 2013 struct fc_lport *lport = ctlr->lp; 2014 struct net_device *netdev = fcoe_netdev(lport); 2015 2016 switch (cdev->enabled) { 2017 case FCOE_CTLR_ENABLED: 2018 return fcoe_enable(netdev); 2019 case FCOE_CTLR_DISABLED: 2020 return fcoe_disable(netdev); 2021 case FCOE_CTLR_UNUSED: 2022 default: 2023 return -ENOTSUPP; 2024 } 2025 } 2026 2027 /** 2028 * fcoe_ctlr_mode() - Switch FIP mode 2029 * @ctlr_dev: The FCoE Controller that is being modified 2030 * 2031 * When the FIP mode has been changed we need to update 2032 * the multicast addresses to ensure we get the correct 2033 * frames. 2034 */ 2035 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev) 2036 { 2037 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2038 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2039 2040 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN && 2041 ctlr->mode != FIP_MODE_VN2VN) { 2042 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS); 2043 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2044 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS); 2045 } else if (ctlr->mode != FIP_MODE_FABRIC) { 2046 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2047 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS); 2048 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS); 2049 } 2050 fcoe_ctlr_set_fip_mode(ctlr_dev); 2051 } 2052 2053 /** 2054 * fcoe_destroy() - Destroy a FCoE interface 2055 * @netdev : The net_device object the Ethernet interface to create on 2056 * 2057 * Called from fcoe transport 2058 * 2059 * Returns: 0 for success 2060 */ 2061 static int fcoe_destroy(struct net_device *netdev) 2062 { 2063 struct fcoe_ctlr *ctlr; 2064 struct fcoe_interface *fcoe; 2065 struct fc_lport *lport; 2066 struct fcoe_port *port; 2067 int rc = 0; 2068 2069 mutex_lock(&fcoe_config_mutex); 2070 rtnl_lock(); 2071 fcoe = fcoe_hostlist_lookup_port(netdev); 2072 if (!fcoe) { 2073 rc = -ENODEV; 2074 goto out_nodev; 2075 } 2076 ctlr = fcoe_to_ctlr(fcoe); 2077 lport = ctlr->lp; 2078 port = lport_priv(lport); 2079 list_del(&fcoe->list); 2080 queue_work(fcoe_wq, &port->destroy_work); 2081 out_nodev: 2082 rtnl_unlock(); 2083 mutex_unlock(&fcoe_config_mutex); 2084 return rc; 2085 } 2086 2087 /** 2088 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context 2089 * @work: Handle to the FCoE port to be destroyed 2090 */ 2091 static void fcoe_destroy_work(struct work_struct *work) 2092 { 2093 struct fcoe_ctlr_device *cdev; 2094 struct fcoe_ctlr *ctlr; 2095 struct fcoe_port *port; 2096 struct fcoe_interface *fcoe; 2097 2098 port = container_of(work, struct fcoe_port, destroy_work); 2099 2100 fcoe_vport_remove(port->lport); 2101 2102 mutex_lock(&fcoe_config_mutex); 2103 2104 fcoe = port->priv; 2105 ctlr = fcoe_to_ctlr(fcoe); 2106 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2107 2108 rtnl_lock(); 2109 fcoe_if_destroy(port->lport); 2110 if (!fcoe->removed) 2111 fcoe_interface_remove(fcoe); 2112 rtnl_unlock(); 2113 fcoe_interface_cleanup(fcoe); 2114 2115 mutex_unlock(&fcoe_config_mutex); 2116 2117 fcoe_ctlr_device_delete(cdev); 2118 } 2119 2120 /** 2121 * fcoe_match() - Check if the FCoE is supported on the given netdevice 2122 * @netdev : The net_device object the Ethernet interface to create on 2123 * 2124 * Called from fcoe transport. 2125 * 2126 * Returns: always returns true as this is the default FCoE transport, 2127 * i.e., support all netdevs. 2128 */ 2129 static bool fcoe_match(struct net_device *netdev) 2130 { 2131 return true; 2132 } 2133 2134 /** 2135 * fcoe_dcb_create() - Initialize DCB attributes and hooks 2136 * @fcoe: The new FCoE interface 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_set_vport_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