1 /* 2 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, write to the Free Software Foundation, Inc., 15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 16 * 17 * Maintained at www.Open-FCoE.org 18 */ 19 20 #include <linux/module.h> 21 #include <linux/spinlock.h> 22 #include <linux/netdevice.h> 23 #include <linux/etherdevice.h> 24 #include <linux/ethtool.h> 25 #include <linux/if_ether.h> 26 #include <linux/if_vlan.h> 27 #include <linux/crc32.h> 28 #include <linux/slab.h> 29 #include <linux/cpu.h> 30 #include <linux/fs.h> 31 #include <linux/sysfs.h> 32 #include <linux/ctype.h> 33 #include <linux/workqueue.h> 34 #include <net/dcbnl.h> 35 #include <net/dcbevent.h> 36 #include <scsi/scsi_tcq.h> 37 #include <scsi/scsicam.h> 38 #include <scsi/scsi_transport.h> 39 #include <scsi/scsi_transport_fc.h> 40 #include <net/rtnetlink.h> 41 42 #include <scsi/fc/fc_encaps.h> 43 #include <scsi/fc/fc_fip.h> 44 #include <scsi/fc/fc_fcoe.h> 45 46 #include <scsi/libfc.h> 47 #include <scsi/fc_frame.h> 48 #include <scsi/libfcoe.h> 49 50 #include "fcoe.h" 51 52 MODULE_AUTHOR("Open-FCoE.org"); 53 MODULE_DESCRIPTION("FCoE"); 54 MODULE_LICENSE("GPL v2"); 55 56 /* Performance tuning parameters for fcoe */ 57 static unsigned int fcoe_ddp_min = 4096; 58 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); 59 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ 60 "Direct Data Placement (DDP)."); 61 62 unsigned int fcoe_debug_logging; 63 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR); 64 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); 65 66 static unsigned int fcoe_e_d_tov = 2 * 1000; 67 module_param_named(e_d_tov, fcoe_e_d_tov, int, S_IRUGO|S_IWUSR); 68 MODULE_PARM_DESC(e_d_tov, "E_D_TOV in ms, default 2000"); 69 70 static unsigned int fcoe_r_a_tov = 2 * 2 * 1000; 71 module_param_named(r_a_tov, fcoe_r_a_tov, int, S_IRUGO|S_IWUSR); 72 MODULE_PARM_DESC(r_a_tov, "R_A_TOV in ms, default 4000"); 73 74 static DEFINE_MUTEX(fcoe_config_mutex); 75 76 static struct workqueue_struct *fcoe_wq; 77 78 /* fcoe host list */ 79 /* must only by accessed under the RTNL mutex */ 80 static LIST_HEAD(fcoe_hostlist); 81 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); 82 83 /* Function Prototypes */ 84 static int fcoe_reset(struct Scsi_Host *); 85 static int fcoe_xmit(struct fc_lport *, struct fc_frame *); 86 static int fcoe_rcv(struct sk_buff *, struct net_device *, 87 struct packet_type *, struct net_device *); 88 static void fcoe_percpu_clean(struct fc_lport *); 89 static int fcoe_link_ok(struct fc_lport *); 90 91 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); 92 static int fcoe_hostlist_add(const struct fc_lport *); 93 static void fcoe_hostlist_del(const struct fc_lport *); 94 95 static int fcoe_device_notification(struct notifier_block *, ulong, void *); 96 static void fcoe_dev_setup(void); 97 static void fcoe_dev_cleanup(void); 98 static struct fcoe_interface 99 *fcoe_hostlist_lookup_port(const struct net_device *); 100 101 static int fcoe_fip_recv(struct sk_buff *, struct net_device *, 102 struct packet_type *, struct net_device *); 103 static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *, 104 struct packet_type *, struct net_device *); 105 106 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); 107 static void fcoe_update_src_mac(struct fc_lport *, u8 *); 108 static u8 *fcoe_get_src_mac(struct fc_lport *); 109 static void fcoe_destroy_work(struct work_struct *); 110 111 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, 112 unsigned int); 113 static int fcoe_ddp_done(struct fc_lport *, u16); 114 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *, 115 unsigned int); 116 static int fcoe_dcb_app_notification(struct notifier_block *notifier, 117 ulong event, void *ptr); 118 119 static bool fcoe_match(struct net_device *netdev); 120 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode); 121 static int fcoe_destroy(struct net_device *netdev); 122 static int fcoe_enable(struct net_device *netdev); 123 static int fcoe_disable(struct net_device *netdev); 124 125 /* fcoe_syfs control interface handlers */ 126 static int fcoe_ctlr_alloc(struct net_device *netdev); 127 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev); 128 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev); 129 130 static struct fc_seq *fcoe_elsct_send(struct fc_lport *, 131 u32 did, struct fc_frame *, 132 unsigned int op, 133 void (*resp)(struct fc_seq *, 134 struct fc_frame *, 135 void *), 136 void *, u32 timeout); 137 static void fcoe_recv_frame(struct sk_buff *skb); 138 139 /* notification function for packets from net device */ 140 static struct notifier_block fcoe_notifier = { 141 .notifier_call = fcoe_device_notification, 142 }; 143 144 /* notification function for DCB events */ 145 static struct notifier_block dcb_notifier = { 146 .notifier_call = fcoe_dcb_app_notification, 147 }; 148 149 static struct scsi_transport_template *fcoe_nport_scsi_transport; 150 static struct scsi_transport_template *fcoe_vport_scsi_transport; 151 152 static int fcoe_vport_destroy(struct fc_vport *); 153 static int fcoe_vport_create(struct fc_vport *, bool disabled); 154 static int fcoe_vport_disable(struct fc_vport *, bool disable); 155 static void fcoe_set_vport_symbolic_name(struct fc_vport *); 156 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); 157 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *); 158 static void fcoe_vport_remove(struct fc_lport *); 159 160 static struct fcoe_sysfs_function_template fcoe_sysfs_templ = { 161 .set_fcoe_ctlr_mode = fcoe_ctlr_mode, 162 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled, 163 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb, 164 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb, 165 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb, 166 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb, 167 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb, 168 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb, 169 170 .get_fcoe_fcf_selected = fcoe_fcf_get_selected, 171 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id, 172 }; 173 174 static struct libfc_function_template fcoe_libfc_fcn_templ = { 175 .frame_send = fcoe_xmit, 176 .ddp_setup = fcoe_ddp_setup, 177 .ddp_done = fcoe_ddp_done, 178 .ddp_target = fcoe_ddp_target, 179 .elsct_send = fcoe_elsct_send, 180 .get_lesb = fcoe_get_lesb, 181 .lport_set_port_id = fcoe_set_port_id, 182 }; 183 184 static struct fc_function_template fcoe_nport_fc_functions = { 185 .show_host_node_name = 1, 186 .show_host_port_name = 1, 187 .show_host_supported_classes = 1, 188 .show_host_supported_fc4s = 1, 189 .show_host_active_fc4s = 1, 190 .show_host_maxframe_size = 1, 191 .show_host_serial_number = 1, 192 .show_host_manufacturer = 1, 193 .show_host_model = 1, 194 .show_host_model_description = 1, 195 .show_host_hardware_version = 1, 196 .show_host_driver_version = 1, 197 .show_host_firmware_version = 1, 198 .show_host_optionrom_version = 1, 199 200 .show_host_port_id = 1, 201 .show_host_supported_speeds = 1, 202 .get_host_speed = fc_get_host_speed, 203 .show_host_speed = 1, 204 .show_host_port_type = 1, 205 .get_host_port_state = fc_get_host_port_state, 206 .show_host_port_state = 1, 207 .show_host_symbolic_name = 1, 208 209 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 210 .show_rport_maxframe_size = 1, 211 .show_rport_supported_classes = 1, 212 213 .show_host_fabric_name = 1, 214 .show_starget_node_name = 1, 215 .show_starget_port_name = 1, 216 .show_starget_port_id = 1, 217 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 218 .show_rport_dev_loss_tmo = 1, 219 .get_fc_host_stats = fc_get_host_stats, 220 .issue_fc_host_lip = fcoe_reset, 221 222 .terminate_rport_io = fc_rport_terminate_io, 223 224 .vport_create = fcoe_vport_create, 225 .vport_delete = fcoe_vport_destroy, 226 .vport_disable = fcoe_vport_disable, 227 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, 228 229 .bsg_request = fc_lport_bsg_request, 230 }; 231 232 static struct fc_function_template fcoe_vport_fc_functions = { 233 .show_host_node_name = 1, 234 .show_host_port_name = 1, 235 .show_host_supported_classes = 1, 236 .show_host_supported_fc4s = 1, 237 .show_host_active_fc4s = 1, 238 .show_host_maxframe_size = 1, 239 .show_host_serial_number = 1, 240 .show_host_manufacturer = 1, 241 .show_host_model = 1, 242 .show_host_model_description = 1, 243 .show_host_hardware_version = 1, 244 .show_host_driver_version = 1, 245 .show_host_firmware_version = 1, 246 .show_host_optionrom_version = 1, 247 248 .show_host_port_id = 1, 249 .show_host_supported_speeds = 1, 250 .get_host_speed = fc_get_host_speed, 251 .show_host_speed = 1, 252 .show_host_port_type = 1, 253 .get_host_port_state = fc_get_host_port_state, 254 .show_host_port_state = 1, 255 .show_host_symbolic_name = 1, 256 257 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 258 .show_rport_maxframe_size = 1, 259 .show_rport_supported_classes = 1, 260 261 .show_host_fabric_name = 1, 262 .show_starget_node_name = 1, 263 .show_starget_port_name = 1, 264 .show_starget_port_id = 1, 265 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 266 .show_rport_dev_loss_tmo = 1, 267 .get_fc_host_stats = fc_get_host_stats, 268 .issue_fc_host_lip = fcoe_reset, 269 270 .terminate_rport_io = fc_rport_terminate_io, 271 272 .bsg_request = fc_lport_bsg_request, 273 }; 274 275 static struct scsi_host_template fcoe_shost_template = { 276 .module = THIS_MODULE, 277 .name = "FCoE Driver", 278 .proc_name = FCOE_NAME, 279 .queuecommand = fc_queuecommand, 280 .eh_timed_out = fc_eh_timed_out, 281 .eh_abort_handler = fc_eh_abort, 282 .eh_device_reset_handler = fc_eh_device_reset, 283 .eh_host_reset_handler = fc_eh_host_reset, 284 .slave_alloc = fc_slave_alloc, 285 .change_queue_depth = scsi_change_queue_depth, 286 .this_id = -1, 287 .cmd_per_lun = 3, 288 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, 289 .sg_tablesize = SG_ALL, 290 .max_sectors = 0xffff, 291 .track_queue_depth = 1, 292 }; 293 294 /** 295 * fcoe_interface_setup() - Setup a FCoE interface 296 * @fcoe: The new FCoE interface 297 * @netdev: The net device that the fcoe interface is on 298 * 299 * Returns : 0 for success 300 * Locking: must be called with the RTNL mutex held 301 */ 302 static int fcoe_interface_setup(struct fcoe_interface *fcoe, 303 struct net_device *netdev) 304 { 305 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 306 struct netdev_hw_addr *ha; 307 struct net_device *real_dev; 308 u8 flogi_maddr[ETH_ALEN]; 309 const struct net_device_ops *ops; 310 311 fcoe->netdev = netdev; 312 313 /* Let LLD initialize for FCoE */ 314 ops = netdev->netdev_ops; 315 if (ops->ndo_fcoe_enable) { 316 if (ops->ndo_fcoe_enable(netdev)) 317 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" 318 " specific feature for LLD.\n"); 319 } 320 321 /* Do not support for bonding device */ 322 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) { 323 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); 324 return -EOPNOTSUPP; 325 } 326 327 /* look for SAN MAC address, if multiple SAN MACs exist, only 328 * use the first one for SPMA */ 329 real_dev = is_vlan_dev(netdev) ? vlan_dev_real_dev(netdev) : netdev; 330 fcoe->realdev = real_dev; 331 rcu_read_lock(); 332 for_each_dev_addr(real_dev, ha) { 333 if ((ha->type == NETDEV_HW_ADDR_T_SAN) && 334 (is_valid_ether_addr(ha->addr))) { 335 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); 336 fip->spma = 1; 337 break; 338 } 339 } 340 rcu_read_unlock(); 341 342 /* setup Source Mac Address */ 343 if (!fip->spma) 344 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); 345 346 /* 347 * Add FCoE MAC address as second unicast MAC address 348 * or enter promiscuous mode if not capable of listening 349 * for multiple unicast MACs. 350 */ 351 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 352 dev_uc_add(netdev, flogi_maddr); 353 if (fip->spma) 354 dev_uc_add(netdev, fip->ctl_src_addr); 355 if (fip->mode == FIP_MODE_VN2VN) { 356 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); 357 dev_mc_add(netdev, FIP_ALL_P2P_MACS); 358 } else 359 dev_mc_add(netdev, FIP_ALL_ENODE_MACS); 360 361 /* 362 * setup the receive function from ethernet driver 363 * on the ethertype for the given device 364 */ 365 fcoe->fcoe_packet_type.func = fcoe_rcv; 366 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE); 367 fcoe->fcoe_packet_type.dev = netdev; 368 dev_add_pack(&fcoe->fcoe_packet_type); 369 370 fcoe->fip_packet_type.func = fcoe_fip_recv; 371 fcoe->fip_packet_type.type = htons(ETH_P_FIP); 372 fcoe->fip_packet_type.dev = netdev; 373 dev_add_pack(&fcoe->fip_packet_type); 374 375 if (netdev != real_dev) { 376 fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv; 377 fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP); 378 fcoe->fip_vlan_packet_type.dev = real_dev; 379 dev_add_pack(&fcoe->fip_vlan_packet_type); 380 } 381 return 0; 382 } 383 384 /** 385 * fcoe_interface_create() - Create a FCoE interface on a net device 386 * @netdev: The net device to create the FCoE interface on 387 * @fip_mode: The mode to use for FIP 388 * 389 * Returns: pointer to a struct fcoe_interface or NULL on error 390 */ 391 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, 392 enum fip_state fip_mode) 393 { 394 struct fcoe_ctlr_device *ctlr_dev; 395 struct fcoe_ctlr *ctlr; 396 struct fcoe_interface *fcoe; 397 int size; 398 int err; 399 400 if (!try_module_get(THIS_MODULE)) { 401 FCOE_NETDEV_DBG(netdev, 402 "Could not get a reference to the module\n"); 403 fcoe = ERR_PTR(-EBUSY); 404 goto out; 405 } 406 407 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface); 408 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ, 409 size); 410 if (!ctlr_dev) { 411 FCOE_DBG("Failed to add fcoe_ctlr_device\n"); 412 fcoe = ERR_PTR(-ENOMEM); 413 goto out_putmod; 414 } 415 416 ctlr = fcoe_ctlr_device_priv(ctlr_dev); 417 ctlr->cdev = ctlr_dev; 418 fcoe = fcoe_ctlr_priv(ctlr); 419 420 dev_hold(netdev); 421 422 /* 423 * Initialize FIP. 424 */ 425 fcoe_ctlr_init(ctlr, fip_mode); 426 ctlr->send = fcoe_fip_send; 427 ctlr->update_mac = fcoe_update_src_mac; 428 ctlr->get_src_addr = fcoe_get_src_mac; 429 430 err = fcoe_interface_setup(fcoe, netdev); 431 if (err) { 432 fcoe_ctlr_destroy(ctlr); 433 fcoe_ctlr_device_delete(ctlr_dev); 434 dev_put(netdev); 435 fcoe = ERR_PTR(err); 436 goto out_putmod; 437 } 438 439 goto out; 440 441 out_putmod: 442 module_put(THIS_MODULE); 443 out: 444 return fcoe; 445 } 446 447 /** 448 * fcoe_interface_remove() - remove FCoE interface from netdev 449 * @fcoe: The FCoE interface to be cleaned up 450 * 451 * Caller must be holding the RTNL mutex 452 */ 453 static void fcoe_interface_remove(struct fcoe_interface *fcoe) 454 { 455 struct net_device *netdev = fcoe->netdev; 456 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 457 u8 flogi_maddr[ETH_ALEN]; 458 const struct net_device_ops *ops; 459 460 /* 461 * Don't listen for Ethernet packets anymore. 462 * synchronize_net() ensures that the packet handlers are not running 463 * on another CPU. dev_remove_pack() would do that, this calls the 464 * unsyncronized version __dev_remove_pack() to avoid multiple delays. 465 */ 466 __dev_remove_pack(&fcoe->fcoe_packet_type); 467 __dev_remove_pack(&fcoe->fip_packet_type); 468 if (netdev != fcoe->realdev) 469 __dev_remove_pack(&fcoe->fip_vlan_packet_type); 470 synchronize_net(); 471 472 /* Delete secondary MAC addresses */ 473 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 474 dev_uc_del(netdev, flogi_maddr); 475 if (fip->spma) 476 dev_uc_del(netdev, fip->ctl_src_addr); 477 if (fip->mode == FIP_MODE_VN2VN) { 478 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); 479 dev_mc_del(netdev, FIP_ALL_P2P_MACS); 480 } else 481 dev_mc_del(netdev, FIP_ALL_ENODE_MACS); 482 483 /* Tell the LLD we are done w/ FCoE */ 484 ops = netdev->netdev_ops; 485 if (ops->ndo_fcoe_disable) { 486 if (ops->ndo_fcoe_disable(netdev)) 487 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" 488 " specific feature for LLD.\n"); 489 } 490 fcoe->removed = 1; 491 } 492 493 494 /** 495 * fcoe_interface_cleanup() - Clean up a FCoE interface 496 * @fcoe: The FCoE interface to be cleaned up 497 */ 498 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) 499 { 500 struct net_device *netdev = fcoe->netdev; 501 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 502 503 /* Release the self-reference taken during fcoe_interface_create() */ 504 /* tear-down the FCoE controller */ 505 fcoe_ctlr_destroy(fip); 506 scsi_host_put(fip->lp->host); 507 dev_put(netdev); 508 module_put(THIS_MODULE); 509 } 510 511 /** 512 * fcoe_fip_recv() - Handler for received FIP frames 513 * @skb: The receive skb 514 * @netdev: The associated net device 515 * @ptype: The packet_type structure which was used to register this handler 516 * @orig_dev: The original net_device the skb was received on. 517 * (in case dev is a bond) 518 * 519 * Returns: 0 for success 520 */ 521 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, 522 struct packet_type *ptype, 523 struct net_device *orig_dev) 524 { 525 struct fcoe_interface *fcoe; 526 struct fcoe_ctlr *ctlr; 527 528 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); 529 ctlr = fcoe_to_ctlr(fcoe); 530 fcoe_ctlr_recv(ctlr, skb); 531 return 0; 532 } 533 534 /** 535 * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames 536 * @skb: The receive skb 537 * @netdev: The associated net device 538 * @ptype: The packet_type structure which was used to register this handler 539 * @orig_dev: The original net_device the skb was received on. 540 * (in case dev is a bond) 541 * 542 * Returns: 0 for success 543 */ 544 static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev, 545 struct packet_type *ptype, 546 struct net_device *orig_dev) 547 { 548 struct fcoe_interface *fcoe; 549 struct fcoe_ctlr *ctlr; 550 551 fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type); 552 ctlr = fcoe_to_ctlr(fcoe); 553 fcoe_ctlr_recv(ctlr, skb); 554 return 0; 555 } 556 557 /** 558 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame 559 * @port: The FCoE port 560 * @skb: The FIP/FCoE packet to be sent 561 */ 562 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb) 563 { 564 if (port->fcoe_pending_queue.qlen) 565 fcoe_check_wait_queue(port->lport, skb); 566 else if (fcoe_start_io(skb)) 567 fcoe_check_wait_queue(port->lport, skb); 568 } 569 570 /** 571 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame 572 * @fip: The FCoE controller 573 * @skb: The FIP packet to be sent 574 */ 575 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 576 { 577 struct fcoe_interface *fcoe = fcoe_from_ctlr(fip); 578 struct fip_frame { 579 struct ethhdr eth; 580 struct fip_header fip; 581 } __packed *frame; 582 583 /* 584 * Use default VLAN for FIP VLAN discovery protocol 585 */ 586 frame = (struct fip_frame *)skb->data; 587 if (ntohs(frame->eth.h_proto) == ETH_P_FIP && 588 ntohs(frame->fip.fip_op) == FIP_OP_VLAN && 589 fcoe->realdev != fcoe->netdev) 590 skb->dev = fcoe->realdev; 591 else 592 skb->dev = fcoe->netdev; 593 fcoe_port_send(lport_priv(fip->lp), skb); 594 } 595 596 /** 597 * fcoe_update_src_mac() - Update the Ethernet MAC filters 598 * @lport: The local port to update the source MAC on 599 * @addr: Unicast MAC address to add 600 * 601 * Remove any previously-set unicast MAC filter. 602 * Add secondary FCoE MAC address filter for our OUI. 603 */ 604 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) 605 { 606 struct fcoe_port *port = lport_priv(lport); 607 struct fcoe_interface *fcoe = port->priv; 608 609 if (!is_zero_ether_addr(port->data_src_addr)) 610 dev_uc_del(fcoe->netdev, port->data_src_addr); 611 if (!is_zero_ether_addr(addr)) 612 dev_uc_add(fcoe->netdev, addr); 613 memcpy(port->data_src_addr, addr, ETH_ALEN); 614 } 615 616 /** 617 * fcoe_get_src_mac() - return the Ethernet source address for an lport 618 * @lport: libfc lport 619 */ 620 static u8 *fcoe_get_src_mac(struct fc_lport *lport) 621 { 622 struct fcoe_port *port = lport_priv(lport); 623 624 return port->data_src_addr; 625 } 626 627 /** 628 * fcoe_lport_config() - Set up a local port 629 * @lport: The local port to be setup 630 * 631 * Returns: 0 for success 632 */ 633 static int fcoe_lport_config(struct fc_lport *lport) 634 { 635 lport->link_up = 0; 636 lport->qfull = 0; 637 lport->max_retry_count = 3; 638 lport->max_rport_retry_count = 3; 639 lport->e_d_tov = fcoe_e_d_tov; 640 lport->r_a_tov = fcoe_r_a_tov; 641 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 642 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); 643 lport->does_npiv = 1; 644 645 fc_lport_init_stats(lport); 646 647 /* lport fc_lport related configuration */ 648 fc_lport_config(lport); 649 650 /* offload related configuration */ 651 lport->crc_offload = 0; 652 lport->seq_offload = 0; 653 lport->lro_enabled = 0; 654 lport->lro_xid = 0; 655 lport->lso_max = 0; 656 657 return 0; 658 } 659 660 /** 661 * fcoe_netdev_features_change - Updates the lport's offload flags based 662 * on the LLD netdev's FCoE feature flags 663 */ 664 static void fcoe_netdev_features_change(struct fc_lport *lport, 665 struct net_device *netdev) 666 { 667 mutex_lock(&lport->lp_mutex); 668 669 if (netdev->features & NETIF_F_SG) 670 lport->sg_supp = 1; 671 else 672 lport->sg_supp = 0; 673 674 if (netdev->features & NETIF_F_FCOE_CRC) { 675 lport->crc_offload = 1; 676 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); 677 } else { 678 lport->crc_offload = 0; 679 } 680 681 if (netdev->features & NETIF_F_FSO) { 682 lport->seq_offload = 1; 683 lport->lso_max = netdev->gso_max_size; 684 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", 685 lport->lso_max); 686 } else { 687 lport->seq_offload = 0; 688 lport->lso_max = 0; 689 } 690 691 if (netdev->fcoe_ddp_xid) { 692 lport->lro_enabled = 1; 693 lport->lro_xid = netdev->fcoe_ddp_xid; 694 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", 695 lport->lro_xid); 696 } else { 697 lport->lro_enabled = 0; 698 lport->lro_xid = 0; 699 } 700 701 mutex_unlock(&lport->lp_mutex); 702 } 703 704 /** 705 * fcoe_netdev_config() - Set up net devive for SW FCoE 706 * @lport: The local port that is associated with the net device 707 * @netdev: The associated net device 708 * 709 * Must be called after fcoe_lport_config() as it will use local port mutex 710 * 711 * Returns: 0 for success 712 */ 713 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) 714 { 715 u32 mfs; 716 u64 wwnn, wwpn; 717 struct fcoe_interface *fcoe; 718 struct fcoe_ctlr *ctlr; 719 struct fcoe_port *port; 720 721 /* Setup lport private data to point to fcoe softc */ 722 port = lport_priv(lport); 723 fcoe = port->priv; 724 ctlr = fcoe_to_ctlr(fcoe); 725 726 /* Figure out the VLAN ID, if any */ 727 if (is_vlan_dev(netdev)) 728 lport->vlan = vlan_dev_vlan_id(netdev); 729 else 730 lport->vlan = 0; 731 732 /* 733 * Determine max frame size based on underlying device and optional 734 * user-configured limit. If the MFS is too low, fcoe_link_ok() 735 * will return 0, so do this first. 736 */ 737 mfs = netdev->mtu; 738 if (netdev->features & NETIF_F_FCOE_MTU) { 739 mfs = FCOE_MTU; 740 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); 741 } 742 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); 743 if (fc_set_mfs(lport, mfs)) 744 return -EINVAL; 745 746 /* offload features support */ 747 fcoe_netdev_features_change(lport, netdev); 748 749 skb_queue_head_init(&port->fcoe_pending_queue); 750 port->fcoe_pending_queue_active = 0; 751 timer_setup(&port->timer, fcoe_queue_timer, 0); 752 753 fcoe_link_speed_update(lport); 754 755 if (!lport->vport) { 756 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) 757 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0); 758 fc_set_wwnn(lport, wwnn); 759 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) 760 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 761 2, 0); 762 fc_set_wwpn(lport, wwpn); 763 } 764 765 return 0; 766 } 767 768 /** 769 * fcoe_shost_config() - Set up the SCSI host associated with a local port 770 * @lport: The local port 771 * @dev: The device associated with the SCSI host 772 * 773 * Must be called after fcoe_lport_config() and fcoe_netdev_config() 774 * 775 * Returns: 0 for success 776 */ 777 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) 778 { 779 int rc = 0; 780 781 /* lport scsi host config */ 782 lport->host->max_lun = FCOE_MAX_LUN; 783 lport->host->max_id = FCOE_MAX_FCP_TARGET; 784 lport->host->max_channel = 0; 785 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; 786 787 if (lport->vport) 788 lport->host->transportt = fcoe_vport_scsi_transport; 789 else 790 lport->host->transportt = fcoe_nport_scsi_transport; 791 792 /* add the new host to the SCSI-ml */ 793 rc = scsi_add_host(lport->host, dev); 794 if (rc) { 795 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " 796 "error on scsi_add_host\n"); 797 return rc; 798 } 799 800 if (!lport->vport) 801 fc_host_max_npiv_vports(lport->host) = USHRT_MAX; 802 803 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 804 "%s v%s over %s", FCOE_NAME, FCOE_VERSION, 805 fcoe_netdev(lport)->name); 806 807 return 0; 808 } 809 810 811 /** 812 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE 813 * @lport: The local port that is associated with the net device 814 * @netdev: The associated net device 815 * 816 * Must be called after fcoe_shost_config() as it will use local port mutex 817 * 818 */ 819 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev) 820 { 821 struct fcoe_interface *fcoe; 822 struct fcoe_port *port; 823 struct net_device *realdev; 824 int rc; 825 826 port = lport_priv(lport); 827 fcoe = port->priv; 828 realdev = fcoe->realdev; 829 830 /* No FDMI state m/c for NPIV ports */ 831 if (lport->vport) 832 return; 833 834 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) { 835 struct netdev_fcoe_hbainfo *fdmi; 836 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL); 837 if (!fdmi) 838 return; 839 840 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev, 841 fdmi); 842 if (rc) { 843 printk(KERN_INFO "fcoe: Failed to retrieve FDMI " 844 "information from netdev.\n"); 845 return; 846 } 847 848 snprintf(fc_host_serial_number(lport->host), 849 FC_SERIAL_NUMBER_SIZE, 850 "%s", 851 fdmi->serial_number); 852 snprintf(fc_host_manufacturer(lport->host), 853 FC_SERIAL_NUMBER_SIZE, 854 "%s", 855 fdmi->manufacturer); 856 snprintf(fc_host_model(lport->host), 857 FC_SYMBOLIC_NAME_SIZE, 858 "%s", 859 fdmi->model); 860 snprintf(fc_host_model_description(lport->host), 861 FC_SYMBOLIC_NAME_SIZE, 862 "%s", 863 fdmi->model_description); 864 snprintf(fc_host_hardware_version(lport->host), 865 FC_VERSION_STRING_SIZE, 866 "%s", 867 fdmi->hardware_version); 868 snprintf(fc_host_driver_version(lport->host), 869 FC_VERSION_STRING_SIZE, 870 "%s", 871 fdmi->driver_version); 872 snprintf(fc_host_optionrom_version(lport->host), 873 FC_VERSION_STRING_SIZE, 874 "%s", 875 fdmi->optionrom_version); 876 snprintf(fc_host_firmware_version(lport->host), 877 FC_VERSION_STRING_SIZE, 878 "%s", 879 fdmi->firmware_version); 880 881 /* Enable FDMI lport states */ 882 lport->fdmi_enabled = 1; 883 kfree(fdmi); 884 } else { 885 lport->fdmi_enabled = 0; 886 printk(KERN_INFO "fcoe: No FDMI support.\n"); 887 } 888 } 889 890 /** 891 * fcoe_oem_match() - The match routine for the offloaded exchange manager 892 * @fp: The I/O frame 893 * 894 * This routine will be associated with an exchange manager (EM). When 895 * the libfc exchange handling code is looking for an EM to use it will 896 * call this routine and pass it the frame that it wishes to send. This 897 * routine will return True if the associated EM is to be used and False 898 * if the echange code should continue looking for an EM. 899 * 900 * The offload EM that this routine is associated with will handle any 901 * packets that are for SCSI read requests. 902 * 903 * This has been enhanced to work when FCoE stack is operating in target 904 * mode. 905 * 906 * Returns: True for read types I/O, otherwise returns false. 907 */ 908 static bool fcoe_oem_match(struct fc_frame *fp) 909 { 910 struct fc_frame_header *fh = fc_frame_header_get(fp); 911 struct fcp_cmnd *fcp; 912 913 if (fc_fcp_is_read(fr_fsp(fp)) && 914 (fr_fsp(fp)->data_len > fcoe_ddp_min)) 915 return true; 916 else if ((fr_fsp(fp) == NULL) && 917 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) && 918 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) { 919 fcp = fc_frame_payload_get(fp, sizeof(*fcp)); 920 if ((fcp->fc_flags & FCP_CFL_WRDATA) && 921 (ntohl(fcp->fc_dl) > fcoe_ddp_min)) 922 return true; 923 } 924 return false; 925 } 926 927 /** 928 * fcoe_em_config() - Allocate and configure an exchange manager 929 * @lport: The local port that the new EM will be associated with 930 * 931 * Returns: 0 on success 932 */ 933 static inline int fcoe_em_config(struct fc_lport *lport) 934 { 935 struct fcoe_port *port = lport_priv(lport); 936 struct fcoe_interface *fcoe = port->priv; 937 struct fcoe_interface *oldfcoe = NULL; 938 struct net_device *old_real_dev, *cur_real_dev; 939 u16 min_xid = FCOE_MIN_XID; 940 u16 max_xid = FCOE_MAX_XID; 941 942 /* 943 * Check if need to allocate an em instance for 944 * offload exchange ids to be shared across all VN_PORTs/lport. 945 */ 946 if (!lport->lro_enabled || !lport->lro_xid || 947 (lport->lro_xid >= max_xid)) { 948 lport->lro_xid = 0; 949 goto skip_oem; 950 } 951 952 /* 953 * Reuse existing offload em instance in case 954 * it is already allocated on real eth device 955 */ 956 if (is_vlan_dev(fcoe->netdev)) 957 cur_real_dev = vlan_dev_real_dev(fcoe->netdev); 958 else 959 cur_real_dev = fcoe->netdev; 960 961 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { 962 if (is_vlan_dev(oldfcoe->netdev)) 963 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); 964 else 965 old_real_dev = oldfcoe->netdev; 966 967 if (cur_real_dev == old_real_dev) { 968 fcoe->oem = oldfcoe->oem; 969 break; 970 } 971 } 972 973 if (fcoe->oem) { 974 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { 975 printk(KERN_ERR "fcoe_em_config: failed to add " 976 "offload em:%p on interface:%s\n", 977 fcoe->oem, fcoe->netdev->name); 978 return -ENOMEM; 979 } 980 } else { 981 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, 982 FCOE_MIN_XID, lport->lro_xid, 983 fcoe_oem_match); 984 if (!fcoe->oem) { 985 printk(KERN_ERR "fcoe_em_config: failed to allocate " 986 "em for offload exches on interface:%s\n", 987 fcoe->netdev->name); 988 return -ENOMEM; 989 } 990 } 991 992 /* 993 * Exclude offload EM xid range from next EM xid range. 994 */ 995 min_xid += lport->lro_xid + 1; 996 997 skip_oem: 998 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { 999 printk(KERN_ERR "fcoe_em_config: failed to " 1000 "allocate em on interface %s\n", fcoe->netdev->name); 1001 return -ENOMEM; 1002 } 1003 1004 return 0; 1005 } 1006 1007 /** 1008 * fcoe_if_destroy() - Tear down a SW FCoE instance 1009 * @lport: The local port to be destroyed 1010 * 1011 * Locking: Must be called with the RTNL mutex held. 1012 * 1013 */ 1014 static void fcoe_if_destroy(struct fc_lport *lport) 1015 { 1016 struct fcoe_port *port = lport_priv(lport); 1017 struct fcoe_interface *fcoe = port->priv; 1018 struct net_device *netdev = fcoe->netdev; 1019 1020 FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); 1021 1022 /* Logout of the fabric */ 1023 fc_fabric_logoff(lport); 1024 1025 /* Cleanup the fc_lport */ 1026 fc_lport_destroy(lport); 1027 1028 /* Stop the transmit retry timer */ 1029 del_timer_sync(&port->timer); 1030 1031 /* Free existing transmit skbs */ 1032 fcoe_clean_pending_queue(lport); 1033 1034 if (!is_zero_ether_addr(port->data_src_addr)) 1035 dev_uc_del(netdev, port->data_src_addr); 1036 if (lport->vport) 1037 synchronize_net(); 1038 else 1039 fcoe_interface_remove(fcoe); 1040 1041 /* Free queued packets for the per-CPU receive threads */ 1042 fcoe_percpu_clean(lport); 1043 1044 /* Detach from the scsi-ml */ 1045 fc_remove_host(lport->host); 1046 scsi_remove_host(lport->host); 1047 1048 /* Destroy lport scsi_priv */ 1049 fc_fcp_destroy(lport); 1050 1051 /* There are no more rports or I/O, free the EM */ 1052 fc_exch_mgr_free(lport); 1053 1054 /* Free memory used by statistical counters */ 1055 fc_lport_free_stats(lport); 1056 1057 /* 1058 * Release the Scsi_Host for vport but hold on to 1059 * master lport until it fcoe interface fully cleaned-up. 1060 */ 1061 if (lport->vport) 1062 scsi_host_put(lport->host); 1063 } 1064 1065 /** 1066 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device 1067 * @lport: The local port to setup DDP for 1068 * @xid: The exchange ID for this DDP transfer 1069 * @sgl: The scatterlist describing this transfer 1070 * @sgc: The number of sg items 1071 * 1072 * Returns: 0 if the DDP context was not configured 1073 */ 1074 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, 1075 struct scatterlist *sgl, unsigned int sgc) 1076 { 1077 struct net_device *netdev = fcoe_netdev(lport); 1078 1079 if (netdev->netdev_ops->ndo_fcoe_ddp_setup) 1080 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, 1081 xid, sgl, 1082 sgc); 1083 1084 return 0; 1085 } 1086 1087 /** 1088 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device 1089 * @lport: The local port to setup DDP for 1090 * @xid: The exchange ID for this DDP transfer 1091 * @sgl: The scatterlist describing this transfer 1092 * @sgc: The number of sg items 1093 * 1094 * Returns: 0 if the DDP context was not configured 1095 */ 1096 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, 1097 struct scatterlist *sgl, unsigned int sgc) 1098 { 1099 struct net_device *netdev = fcoe_netdev(lport); 1100 1101 if (netdev->netdev_ops->ndo_fcoe_ddp_target) 1102 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, 1103 sgl, sgc); 1104 1105 return 0; 1106 } 1107 1108 1109 /** 1110 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device 1111 * @lport: The local port to complete DDP on 1112 * @xid: The exchange ID for this DDP transfer 1113 * 1114 * Returns: the length of data that have been completed by DDP 1115 */ 1116 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) 1117 { 1118 struct net_device *netdev = fcoe_netdev(lport); 1119 1120 if (netdev->netdev_ops->ndo_fcoe_ddp_done) 1121 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); 1122 return 0; 1123 } 1124 1125 /** 1126 * fcoe_if_create() - Create a FCoE instance on an interface 1127 * @fcoe: The FCoE interface to create a local port on 1128 * @parent: The device pointer to be the parent in sysfs for the SCSI host 1129 * @npiv: Indicates if the port is a vport or not 1130 * 1131 * Creates a fc_lport instance and a Scsi_Host instance and configure them. 1132 * 1133 * Returns: The allocated fc_lport or an error pointer 1134 */ 1135 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, 1136 struct device *parent, int npiv) 1137 { 1138 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1139 struct net_device *netdev = fcoe->netdev; 1140 struct fc_lport *lport, *n_port; 1141 struct fcoe_port *port; 1142 struct Scsi_Host *shost; 1143 int rc; 1144 /* 1145 * parent is only a vport if npiv is 1, 1146 * but we'll only use vport in that case so go ahead and set it 1147 */ 1148 struct fc_vport *vport = dev_to_vport(parent); 1149 1150 FCOE_NETDEV_DBG(netdev, "Create Interface\n"); 1151 1152 if (!npiv) 1153 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); 1154 else 1155 lport = libfc_vport_create(vport, sizeof(*port)); 1156 1157 if (!lport) { 1158 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); 1159 rc = -ENOMEM; 1160 goto out; 1161 } 1162 port = lport_priv(lport); 1163 port->lport = lport; 1164 port->priv = fcoe; 1165 port->get_netdev = fcoe_netdev; 1166 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; 1167 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; 1168 INIT_WORK(&port->destroy_work, fcoe_destroy_work); 1169 1170 /* 1171 * Need to add the lport to the hostlist 1172 * so we catch NETDEV_CHANGE events. 1173 */ 1174 fcoe_hostlist_add(lport); 1175 1176 /* configure a fc_lport including the exchange manager */ 1177 rc = fcoe_lport_config(lport); 1178 if (rc) { 1179 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " 1180 "interface\n"); 1181 goto out_host_put; 1182 } 1183 1184 if (npiv) { 1185 FCOE_NETDEV_DBG(netdev, "Setting vport names, " 1186 "%16.16llx %16.16llx\n", 1187 vport->node_name, vport->port_name); 1188 fc_set_wwnn(lport, vport->node_name); 1189 fc_set_wwpn(lport, vport->port_name); 1190 } 1191 1192 /* configure lport network properties */ 1193 rc = fcoe_netdev_config(lport, netdev); 1194 if (rc) { 1195 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " 1196 "interface\n"); 1197 goto out_lp_destroy; 1198 } 1199 1200 /* configure lport scsi host properties */ 1201 rc = fcoe_shost_config(lport, parent); 1202 if (rc) { 1203 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " 1204 "interface\n"); 1205 goto out_lp_destroy; 1206 } 1207 1208 /* Initialize the library */ 1209 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1); 1210 if (rc) { 1211 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " 1212 "interface\n"); 1213 goto out_lp_destroy; 1214 } 1215 1216 /* Initialized FDMI information */ 1217 fcoe_fdmi_info(lport, netdev); 1218 1219 /* 1220 * fcoe_em_alloc() and fcoe_hostlist_add() both 1221 * need to be atomic with respect to other changes to the 1222 * hostlist since fcoe_em_alloc() looks for an existing EM 1223 * instance on host list updated by fcoe_hostlist_add(). 1224 * 1225 * This is currently handled through the fcoe_config_mutex 1226 * begin held. 1227 */ 1228 if (!npiv) 1229 /* lport exch manager allocation */ 1230 rc = fcoe_em_config(lport); 1231 else { 1232 shost = vport_to_shost(vport); 1233 n_port = shost_priv(shost); 1234 rc = fc_exch_mgr_list_clone(n_port, lport); 1235 } 1236 1237 if (rc) { 1238 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); 1239 goto out_lp_destroy; 1240 } 1241 1242 return lport; 1243 1244 out_lp_destroy: 1245 fc_exch_mgr_free(lport); 1246 out_host_put: 1247 fcoe_hostlist_del(lport); 1248 scsi_host_put(lport->host); 1249 out: 1250 return ERR_PTR(rc); 1251 } 1252 1253 /** 1254 * fcoe_if_init() - Initialization routine for fcoe.ko 1255 * 1256 * Attaches the SW FCoE transport to the FC transport 1257 * 1258 * Returns: 0 on success 1259 */ 1260 static int __init fcoe_if_init(void) 1261 { 1262 /* attach to scsi transport */ 1263 fcoe_nport_scsi_transport = 1264 fc_attach_transport(&fcoe_nport_fc_functions); 1265 fcoe_vport_scsi_transport = 1266 fc_attach_transport(&fcoe_vport_fc_functions); 1267 1268 if (!fcoe_nport_scsi_transport) { 1269 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); 1270 return -ENODEV; 1271 } 1272 1273 return 0; 1274 } 1275 1276 /** 1277 * fcoe_if_exit() - Tear down fcoe.ko 1278 * 1279 * Detaches the SW FCoE transport from the FC transport 1280 * 1281 * Returns: 0 on success 1282 */ 1283 static int __exit fcoe_if_exit(void) 1284 { 1285 fc_release_transport(fcoe_nport_scsi_transport); 1286 fc_release_transport(fcoe_vport_scsi_transport); 1287 fcoe_nport_scsi_transport = NULL; 1288 fcoe_vport_scsi_transport = NULL; 1289 return 0; 1290 } 1291 1292 static void fcoe_thread_cleanup_local(unsigned int cpu) 1293 { 1294 struct page *crc_eof; 1295 struct fcoe_percpu_s *p; 1296 1297 p = per_cpu_ptr(&fcoe_percpu, cpu); 1298 spin_lock_bh(&p->fcoe_rx_list.lock); 1299 crc_eof = p->crc_eof_page; 1300 p->crc_eof_page = NULL; 1301 p->crc_eof_offset = 0; 1302 spin_unlock_bh(&p->fcoe_rx_list.lock); 1303 1304 if (crc_eof) 1305 put_page(crc_eof); 1306 flush_work(&p->work); 1307 } 1308 1309 /** 1310 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming 1311 * command. 1312 * 1313 * This routine selects next CPU based on cpumask to distribute 1314 * incoming requests in round robin. 1315 * 1316 * Returns: int CPU number 1317 */ 1318 static inline unsigned int fcoe_select_cpu(void) 1319 { 1320 static unsigned int selected_cpu; 1321 1322 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask); 1323 if (selected_cpu >= nr_cpu_ids) 1324 selected_cpu = cpumask_first(cpu_online_mask); 1325 1326 return selected_cpu; 1327 } 1328 1329 /** 1330 * fcoe_rcv() - Receive packets from a net device 1331 * @skb: The received packet 1332 * @netdev: The net device that the packet was received on 1333 * @ptype: The packet type context 1334 * @olddev: The last device net device 1335 * 1336 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a 1337 * FC frame and passes the frame to libfc. 1338 * 1339 * Returns: 0 for success 1340 */ 1341 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, 1342 struct packet_type *ptype, struct net_device *olddev) 1343 { 1344 struct fc_lport *lport; 1345 struct fcoe_rcv_info *fr; 1346 struct fcoe_ctlr *ctlr; 1347 struct fcoe_interface *fcoe; 1348 struct fc_frame_header *fh; 1349 struct fcoe_percpu_s *fps; 1350 struct ethhdr *eh; 1351 unsigned int cpu; 1352 1353 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); 1354 ctlr = fcoe_to_ctlr(fcoe); 1355 lport = ctlr->lp; 1356 if (unlikely(!lport)) { 1357 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n"); 1358 goto err2; 1359 } 1360 if (!lport->link_up) 1361 goto err2; 1362 1363 FCOE_NETDEV_DBG(netdev, 1364 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1365 skb->len, skb->data_len, skb->head, skb->data, 1366 skb_tail_pointer(skb), skb_end_pointer(skb), 1367 skb->csum, skb->dev ? skb->dev->name : "<NULL>"); 1368 1369 1370 skb = skb_share_check(skb, GFP_ATOMIC); 1371 1372 if (skb == NULL) 1373 return NET_RX_DROP; 1374 1375 eh = eth_hdr(skb); 1376 1377 if (is_fip_mode(ctlr) && 1378 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) { 1379 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", 1380 eh->h_source); 1381 goto err; 1382 } 1383 1384 /* 1385 * Check for minimum frame length, and make sure required FCoE 1386 * and FC headers are pulled into the linear data area. 1387 */ 1388 if (unlikely((skb->len < FCOE_MIN_FRAME) || 1389 !pskb_may_pull(skb, FCOE_HEADER_LEN))) 1390 goto err; 1391 1392 skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); 1393 fh = (struct fc_frame_header *) skb_transport_header(skb); 1394 1395 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { 1396 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", 1397 eh->h_dest); 1398 goto err; 1399 } 1400 1401 fr = fcoe_dev_from_skb(skb); 1402 fr->fr_dev = lport; 1403 1404 /* 1405 * In case the incoming frame's exchange is originated from 1406 * the initiator, then received frame's exchange id is ANDed 1407 * with fc_cpu_mask bits to get the same cpu on which exchange 1408 * was originated, otherwise select cpu using rx exchange id 1409 * or fcoe_select_cpu(). 1410 */ 1411 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) 1412 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; 1413 else { 1414 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN) 1415 cpu = fcoe_select_cpu(); 1416 else 1417 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; 1418 } 1419 1420 if (cpu >= nr_cpu_ids) 1421 goto err; 1422 1423 fps = &per_cpu(fcoe_percpu, cpu); 1424 spin_lock(&fps->fcoe_rx_list.lock); 1425 /* 1426 * We now have a valid CPU that we're targeting for 1427 * this skb. We also have this receive thread locked, 1428 * so we're free to queue skbs into it's queue. 1429 */ 1430 1431 /* 1432 * Note: We used to have a set of conditions under which we would 1433 * call fcoe_recv_frame directly, rather than queuing to the rx list 1434 * as it could save a few cycles, but doing so is prohibited, as 1435 * fcoe_recv_frame has several paths that may sleep, which is forbidden 1436 * in softirq context. 1437 */ 1438 __skb_queue_tail(&fps->fcoe_rx_list, skb); 1439 schedule_work_on(cpu, &fps->work); 1440 spin_unlock(&fps->fcoe_rx_list.lock); 1441 1442 return NET_RX_SUCCESS; 1443 err: 1444 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++; 1445 put_cpu(); 1446 err2: 1447 kfree_skb(skb); 1448 return NET_RX_DROP; 1449 } 1450 1451 /** 1452 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC 1453 * @skb: The packet to be transmitted 1454 * @tlen: The total length of the trailer 1455 * 1456 * Returns: 0 for success 1457 */ 1458 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) 1459 { 1460 struct fcoe_percpu_s *fps; 1461 int rc; 1462 1463 fps = &get_cpu_var(fcoe_percpu); 1464 rc = fcoe_get_paged_crc_eof(skb, tlen, fps); 1465 put_cpu_var(fcoe_percpu); 1466 1467 return rc; 1468 } 1469 1470 /** 1471 * fcoe_xmit() - Transmit a FCoE frame 1472 * @lport: The local port that the frame is to be transmitted for 1473 * @fp: The frame to be transmitted 1474 * 1475 * Return: 0 for success 1476 */ 1477 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) 1478 { 1479 int wlen; 1480 u32 crc; 1481 struct ethhdr *eh; 1482 struct fcoe_crc_eof *cp; 1483 struct sk_buff *skb; 1484 struct fc_stats *stats; 1485 struct fc_frame_header *fh; 1486 unsigned int hlen; /* header length implies the version */ 1487 unsigned int tlen; /* trailer length */ 1488 unsigned int elen; /* eth header, may include vlan */ 1489 struct fcoe_port *port = lport_priv(lport); 1490 struct fcoe_interface *fcoe = port->priv; 1491 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1492 u8 sof, eof; 1493 struct fcoe_hdr *hp; 1494 1495 WARN_ON((fr_len(fp) % sizeof(u32)) != 0); 1496 1497 fh = fc_frame_header_get(fp); 1498 skb = fp_skb(fp); 1499 wlen = skb->len / FCOE_WORD_TO_BYTE; 1500 1501 if (!lport->link_up) { 1502 kfree_skb(skb); 1503 return 0; 1504 } 1505 1506 if (unlikely(fh->fh_type == FC_TYPE_ELS) && 1507 fcoe_ctlr_els_send(ctlr, lport, skb)) 1508 return 0; 1509 1510 sof = fr_sof(fp); 1511 eof = fr_eof(fp); 1512 1513 elen = sizeof(struct ethhdr); 1514 hlen = sizeof(struct fcoe_hdr); 1515 tlen = sizeof(struct fcoe_crc_eof); 1516 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; 1517 1518 /* crc offload */ 1519 if (likely(lport->crc_offload)) { 1520 skb->ip_summed = CHECKSUM_PARTIAL; 1521 skb->csum_start = skb_headroom(skb); 1522 skb->csum_offset = skb->len; 1523 crc = 0; 1524 } else { 1525 skb->ip_summed = CHECKSUM_NONE; 1526 crc = fcoe_fc_crc(fp); 1527 } 1528 1529 /* copy port crc and eof to the skb buff */ 1530 if (skb_is_nonlinear(skb)) { 1531 skb_frag_t *frag; 1532 if (fcoe_alloc_paged_crc_eof(skb, tlen)) { 1533 kfree_skb(skb); 1534 return -ENOMEM; 1535 } 1536 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; 1537 cp = kmap_atomic(skb_frag_page(frag)) 1538 + frag->page_offset; 1539 } else { 1540 cp = skb_put(skb, tlen); 1541 } 1542 1543 memset(cp, 0, sizeof(*cp)); 1544 cp->fcoe_eof = eof; 1545 cp->fcoe_crc32 = cpu_to_le32(~crc); 1546 1547 if (skb_is_nonlinear(skb)) { 1548 kunmap_atomic(cp); 1549 cp = NULL; 1550 } 1551 1552 /* adjust skb network/transport offsets to match mac/fcoe/port */ 1553 skb_push(skb, elen + hlen); 1554 skb_reset_mac_header(skb); 1555 skb_reset_network_header(skb); 1556 skb->mac_len = elen; 1557 skb->protocol = htons(ETH_P_FCOE); 1558 skb->priority = fcoe->priority; 1559 1560 if (is_vlan_dev(fcoe->netdev) && 1561 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) { 1562 /* must set skb->dev before calling vlan_put_tag */ 1563 skb->dev = fcoe->realdev; 1564 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1565 vlan_dev_vlan_id(fcoe->netdev)); 1566 } else 1567 skb->dev = fcoe->netdev; 1568 1569 /* fill up mac and fcoe headers */ 1570 eh = eth_hdr(skb); 1571 eh->h_proto = htons(ETH_P_FCOE); 1572 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN); 1573 if (ctlr->map_dest) 1574 memcpy(eh->h_dest + 3, fh->fh_d_id, 3); 1575 1576 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN)) 1577 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN); 1578 else 1579 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); 1580 1581 hp = (struct fcoe_hdr *)(eh + 1); 1582 memset(hp, 0, sizeof(*hp)); 1583 if (FC_FCOE_VER) 1584 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); 1585 hp->fcoe_sof = sof; 1586 1587 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ 1588 if (lport->seq_offload && fr_max_payload(fp)) { 1589 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; 1590 skb_shinfo(skb)->gso_size = fr_max_payload(fp); 1591 } else { 1592 skb_shinfo(skb)->gso_type = 0; 1593 skb_shinfo(skb)->gso_size = 0; 1594 } 1595 /* update tx stats: regardless if LLD fails */ 1596 stats = per_cpu_ptr(lport->stats, get_cpu()); 1597 stats->TxFrames++; 1598 stats->TxWords += wlen; 1599 put_cpu(); 1600 1601 /* send down to lld */ 1602 fr_dev(fp) = lport; 1603 fcoe_port_send(port, skb); 1604 return 0; 1605 } 1606 1607 /** 1608 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC 1609 * @lport: The local port the frame was received on 1610 * @fp: The received frame 1611 * 1612 * Return: 0 on passing filtering checks 1613 */ 1614 static inline int fcoe_filter_frames(struct fc_lport *lport, 1615 struct fc_frame *fp) 1616 { 1617 struct fcoe_ctlr *ctlr; 1618 struct fcoe_interface *fcoe; 1619 struct fc_frame_header *fh; 1620 struct sk_buff *skb = (struct sk_buff *)fp; 1621 struct fc_stats *stats; 1622 1623 /* 1624 * We only check CRC if no offload is available and if it is 1625 * it's solicited data, in which case, the FCP layer would 1626 * check it during the copy. 1627 */ 1628 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) 1629 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1630 else 1631 fr_flags(fp) |= FCPHF_CRC_UNCHECKED; 1632 1633 fh = (struct fc_frame_header *) skb_transport_header(skb); 1634 fh = fc_frame_header_get(fp); 1635 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) 1636 return 0; 1637 1638 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; 1639 ctlr = fcoe_to_ctlr(fcoe); 1640 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && 1641 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { 1642 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); 1643 return -EINVAL; 1644 } 1645 1646 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || 1647 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { 1648 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1649 return 0; 1650 } 1651 1652 stats = per_cpu_ptr(lport->stats, get_cpu()); 1653 stats->InvalidCRCCount++; 1654 if (stats->InvalidCRCCount < 5) 1655 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); 1656 put_cpu(); 1657 return -EINVAL; 1658 } 1659 1660 /** 1661 * fcoe_recv_frame() - process a single received frame 1662 * @skb: frame to process 1663 */ 1664 static void fcoe_recv_frame(struct sk_buff *skb) 1665 { 1666 u32 fr_len; 1667 struct fc_lport *lport; 1668 struct fcoe_rcv_info *fr; 1669 struct fc_stats *stats; 1670 struct fcoe_crc_eof crc_eof; 1671 struct fc_frame *fp; 1672 struct fcoe_hdr *hp; 1673 1674 fr = fcoe_dev_from_skb(skb); 1675 lport = fr->fr_dev; 1676 if (unlikely(!lport)) { 1677 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n"); 1678 kfree_skb(skb); 1679 return; 1680 } 1681 1682 FCOE_NETDEV_DBG(skb->dev, 1683 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1684 skb->len, skb->data_len, 1685 skb->head, skb->data, skb_tail_pointer(skb), 1686 skb_end_pointer(skb), skb->csum, 1687 skb->dev ? skb->dev->name : "<NULL>"); 1688 1689 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ 1690 1691 /* 1692 * Frame length checks and setting up the header pointers 1693 * was done in fcoe_rcv already. 1694 */ 1695 hp = (struct fcoe_hdr *) skb_network_header(skb); 1696 1697 stats = per_cpu_ptr(lport->stats, get_cpu()); 1698 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { 1699 if (stats->ErrorFrames < 5) 1700 printk(KERN_WARNING "fcoe: FCoE version " 1701 "mismatch: The frame has " 1702 "version %x, but the " 1703 "initiator supports version " 1704 "%x\n", FC_FCOE_DECAPS_VER(hp), 1705 FC_FCOE_VER); 1706 goto drop; 1707 } 1708 1709 skb_pull(skb, sizeof(struct fcoe_hdr)); 1710 fr_len = skb->len - sizeof(struct fcoe_crc_eof); 1711 1712 stats->RxFrames++; 1713 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; 1714 1715 fp = (struct fc_frame *)skb; 1716 fc_frame_init(fp); 1717 fr_dev(fp) = lport; 1718 fr_sof(fp) = hp->fcoe_sof; 1719 1720 /* Copy out the CRC and EOF trailer for access */ 1721 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) 1722 goto drop; 1723 fr_eof(fp) = crc_eof.fcoe_eof; 1724 fr_crc(fp) = crc_eof.fcoe_crc32; 1725 if (pskb_trim(skb, fr_len)) 1726 goto drop; 1727 1728 if (!fcoe_filter_frames(lport, fp)) { 1729 put_cpu(); 1730 fc_exch_recv(lport, fp); 1731 return; 1732 } 1733 drop: 1734 stats->ErrorFrames++; 1735 put_cpu(); 1736 kfree_skb(skb); 1737 } 1738 1739 /** 1740 * fcoe_receive_work() - The per-CPU worker 1741 * @work: The work struct 1742 * 1743 */ 1744 static void fcoe_receive_work(struct work_struct *work) 1745 { 1746 struct fcoe_percpu_s *p; 1747 struct sk_buff *skb; 1748 struct sk_buff_head tmp; 1749 1750 p = container_of(work, struct fcoe_percpu_s, work); 1751 skb_queue_head_init(&tmp); 1752 1753 spin_lock_bh(&p->fcoe_rx_list.lock); 1754 skb_queue_splice_init(&p->fcoe_rx_list, &tmp); 1755 spin_unlock_bh(&p->fcoe_rx_list.lock); 1756 1757 if (!skb_queue_len(&tmp)) 1758 return; 1759 1760 while ((skb = __skb_dequeue(&tmp))) 1761 fcoe_recv_frame(skb); 1762 } 1763 1764 /** 1765 * fcoe_dev_setup() - Setup the link change notification interface 1766 */ 1767 static void fcoe_dev_setup(void) 1768 { 1769 register_dcbevent_notifier(&dcb_notifier); 1770 register_netdevice_notifier(&fcoe_notifier); 1771 } 1772 1773 /** 1774 * fcoe_dev_cleanup() - Cleanup the link change notification interface 1775 */ 1776 static void fcoe_dev_cleanup(void) 1777 { 1778 unregister_dcbevent_notifier(&dcb_notifier); 1779 unregister_netdevice_notifier(&fcoe_notifier); 1780 } 1781 1782 static struct fcoe_interface * 1783 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev) 1784 { 1785 struct fcoe_interface *fcoe; 1786 struct net_device *real_dev; 1787 1788 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1789 if (is_vlan_dev(fcoe->netdev)) 1790 real_dev = vlan_dev_real_dev(fcoe->netdev); 1791 else 1792 real_dev = fcoe->netdev; 1793 1794 if (netdev == real_dev) 1795 return fcoe; 1796 } 1797 return NULL; 1798 } 1799 1800 static int fcoe_dcb_app_notification(struct notifier_block *notifier, 1801 ulong event, void *ptr) 1802 { 1803 struct dcb_app_type *entry = ptr; 1804 struct fcoe_ctlr *ctlr; 1805 struct fcoe_interface *fcoe; 1806 struct net_device *netdev; 1807 int prio; 1808 1809 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE) 1810 return NOTIFY_OK; 1811 1812 netdev = dev_get_by_index(&init_net, entry->ifindex); 1813 if (!netdev) 1814 return NOTIFY_OK; 1815 1816 fcoe = fcoe_hostlist_lookup_realdev_port(netdev); 1817 dev_put(netdev); 1818 if (!fcoe) 1819 return NOTIFY_OK; 1820 1821 ctlr = fcoe_to_ctlr(fcoe); 1822 1823 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE) 1824 prio = ffs(entry->app.priority) - 1; 1825 else 1826 prio = entry->app.priority; 1827 1828 if (prio < 0) 1829 return NOTIFY_OK; 1830 1831 if (entry->app.protocol == ETH_P_FIP || 1832 entry->app.protocol == ETH_P_FCOE) 1833 ctlr->priority = prio; 1834 1835 if (entry->app.protocol == ETH_P_FCOE) 1836 fcoe->priority = prio; 1837 1838 return NOTIFY_OK; 1839 } 1840 1841 /** 1842 * fcoe_device_notification() - Handler for net device events 1843 * @notifier: The context of the notification 1844 * @event: The type of event 1845 * @ptr: The net device that the event was on 1846 * 1847 * This function is called by the Ethernet driver in case of link change event. 1848 * 1849 * Returns: 0 for success 1850 */ 1851 static int fcoe_device_notification(struct notifier_block *notifier, 1852 ulong event, void *ptr) 1853 { 1854 struct fcoe_ctlr_device *cdev; 1855 struct fc_lport *lport = NULL; 1856 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 1857 struct fcoe_ctlr *ctlr; 1858 struct fcoe_interface *fcoe; 1859 struct fc_stats *stats; 1860 u32 link_possible = 1; 1861 u32 mfs; 1862 int rc = NOTIFY_OK; 1863 1864 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1865 if (fcoe->netdev == netdev) { 1866 ctlr = fcoe_to_ctlr(fcoe); 1867 lport = ctlr->lp; 1868 break; 1869 } 1870 } 1871 if (!lport) { 1872 rc = NOTIFY_DONE; 1873 goto out; 1874 } 1875 1876 switch (event) { 1877 case NETDEV_DOWN: 1878 case NETDEV_GOING_DOWN: 1879 link_possible = 0; 1880 break; 1881 case NETDEV_UP: 1882 case NETDEV_CHANGE: 1883 break; 1884 case NETDEV_CHANGEMTU: 1885 if (netdev->features & NETIF_F_FCOE_MTU) 1886 break; 1887 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + 1888 sizeof(struct fcoe_crc_eof)); 1889 if (mfs >= FC_MIN_MAX_FRAME) 1890 fc_set_mfs(lport, mfs); 1891 break; 1892 case NETDEV_REGISTER: 1893 break; 1894 case NETDEV_UNREGISTER: 1895 list_del(&fcoe->list); 1896 fcoe_vport_remove(lport); 1897 mutex_lock(&fcoe_config_mutex); 1898 fcoe_if_destroy(lport); 1899 if (!fcoe->removed) 1900 fcoe_interface_remove(fcoe); 1901 fcoe_interface_cleanup(fcoe); 1902 mutex_unlock(&fcoe_config_mutex); 1903 fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr)); 1904 goto out; 1905 break; 1906 case NETDEV_FEAT_CHANGE: 1907 fcoe_netdev_features_change(lport, netdev); 1908 break; 1909 default: 1910 FCOE_NETDEV_DBG(netdev, "Unknown event %ld " 1911 "from netdev netlink\n", event); 1912 } 1913 1914 fcoe_link_speed_update(lport); 1915 1916 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 1917 1918 if (link_possible && !fcoe_link_ok(lport)) { 1919 switch (cdev->enabled) { 1920 case FCOE_CTLR_DISABLED: 1921 pr_info("Link up while interface is disabled.\n"); 1922 break; 1923 case FCOE_CTLR_ENABLED: 1924 case FCOE_CTLR_UNUSED: 1925 fcoe_ctlr_link_up(ctlr); 1926 }; 1927 } else if (fcoe_ctlr_link_down(ctlr)) { 1928 switch (cdev->enabled) { 1929 case FCOE_CTLR_DISABLED: 1930 pr_info("Link down while interface is disabled.\n"); 1931 break; 1932 case FCOE_CTLR_ENABLED: 1933 case FCOE_CTLR_UNUSED: 1934 stats = per_cpu_ptr(lport->stats, get_cpu()); 1935 stats->LinkFailureCount++; 1936 put_cpu(); 1937 fcoe_clean_pending_queue(lport); 1938 }; 1939 } 1940 out: 1941 return rc; 1942 } 1943 1944 /** 1945 * fcoe_disable() - Disables a FCoE interface 1946 * @netdev : The net_device object the Ethernet interface to create on 1947 * 1948 * Called from fcoe transport. 1949 * 1950 * Returns: 0 for success 1951 * 1952 * Deprecated: use fcoe_ctlr_enabled() 1953 */ 1954 static int fcoe_disable(struct net_device *netdev) 1955 { 1956 struct fcoe_ctlr *ctlr; 1957 struct fcoe_interface *fcoe; 1958 int rc = 0; 1959 1960 mutex_lock(&fcoe_config_mutex); 1961 1962 rtnl_lock(); 1963 fcoe = fcoe_hostlist_lookup_port(netdev); 1964 rtnl_unlock(); 1965 1966 if (fcoe) { 1967 ctlr = fcoe_to_ctlr(fcoe); 1968 fcoe_ctlr_link_down(ctlr); 1969 fcoe_clean_pending_queue(ctlr->lp); 1970 } else 1971 rc = -ENODEV; 1972 1973 mutex_unlock(&fcoe_config_mutex); 1974 return rc; 1975 } 1976 1977 /** 1978 * fcoe_enable() - Enables a FCoE interface 1979 * @netdev : The net_device object the Ethernet interface to create on 1980 * 1981 * Called from fcoe transport. 1982 * 1983 * Returns: 0 for success 1984 */ 1985 static int fcoe_enable(struct net_device *netdev) 1986 { 1987 struct fcoe_ctlr *ctlr; 1988 struct fcoe_interface *fcoe; 1989 int rc = 0; 1990 1991 mutex_lock(&fcoe_config_mutex); 1992 rtnl_lock(); 1993 fcoe = fcoe_hostlist_lookup_port(netdev); 1994 rtnl_unlock(); 1995 1996 if (!fcoe) { 1997 rc = -ENODEV; 1998 goto out; 1999 } 2000 2001 ctlr = fcoe_to_ctlr(fcoe); 2002 2003 if (!fcoe_link_ok(ctlr->lp)) 2004 fcoe_ctlr_link_up(ctlr); 2005 2006 out: 2007 mutex_unlock(&fcoe_config_mutex); 2008 return rc; 2009 } 2010 2011 /** 2012 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller 2013 * @cdev: The FCoE Controller that is being enabled or disabled 2014 * 2015 * fcoe_sysfs will ensure that the state of 'enabled' has 2016 * changed, so no checking is necessary here. This routine simply 2017 * calls fcoe_enable or fcoe_disable, both of which are deprecated. 2018 * When those routines are removed the functionality can be merged 2019 * here. 2020 */ 2021 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev) 2022 { 2023 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev); 2024 struct fc_lport *lport = ctlr->lp; 2025 struct net_device *netdev = fcoe_netdev(lport); 2026 2027 switch (cdev->enabled) { 2028 case FCOE_CTLR_ENABLED: 2029 return fcoe_enable(netdev); 2030 case FCOE_CTLR_DISABLED: 2031 return fcoe_disable(netdev); 2032 case FCOE_CTLR_UNUSED: 2033 default: 2034 return -ENOTSUPP; 2035 }; 2036 } 2037 2038 /** 2039 * fcoe_ctlr_mode() - Switch FIP mode 2040 * @cdev: The FCoE Controller that is being modified 2041 * 2042 * When the FIP mode has been changed we need to update 2043 * the multicast addresses to ensure we get the correct 2044 * frames. 2045 */ 2046 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev) 2047 { 2048 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2049 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2050 2051 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN && 2052 ctlr->mode != FIP_MODE_VN2VN) { 2053 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS); 2054 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2055 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS); 2056 } else if (ctlr->mode != FIP_MODE_FABRIC) { 2057 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2058 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS); 2059 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS); 2060 } 2061 fcoe_ctlr_set_fip_mode(ctlr_dev); 2062 } 2063 2064 /** 2065 * fcoe_destroy() - Destroy a FCoE interface 2066 * @netdev : The net_device object the Ethernet interface to create on 2067 * 2068 * Called from fcoe transport 2069 * 2070 * Returns: 0 for success 2071 */ 2072 static int fcoe_destroy(struct net_device *netdev) 2073 { 2074 struct fcoe_ctlr *ctlr; 2075 struct fcoe_interface *fcoe; 2076 struct fc_lport *lport; 2077 struct fcoe_port *port; 2078 int rc = 0; 2079 2080 mutex_lock(&fcoe_config_mutex); 2081 rtnl_lock(); 2082 fcoe = fcoe_hostlist_lookup_port(netdev); 2083 if (!fcoe) { 2084 rc = -ENODEV; 2085 goto out_nodev; 2086 } 2087 ctlr = fcoe_to_ctlr(fcoe); 2088 lport = ctlr->lp; 2089 port = lport_priv(lport); 2090 list_del(&fcoe->list); 2091 queue_work(fcoe_wq, &port->destroy_work); 2092 out_nodev: 2093 rtnl_unlock(); 2094 mutex_unlock(&fcoe_config_mutex); 2095 return rc; 2096 } 2097 2098 /** 2099 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context 2100 * @work: Handle to the FCoE port to be destroyed 2101 */ 2102 static void fcoe_destroy_work(struct work_struct *work) 2103 { 2104 struct fcoe_ctlr_device *cdev; 2105 struct fcoe_ctlr *ctlr; 2106 struct fcoe_port *port; 2107 struct fcoe_interface *fcoe; 2108 2109 port = container_of(work, struct fcoe_port, destroy_work); 2110 2111 fcoe_vport_remove(port->lport); 2112 2113 mutex_lock(&fcoe_config_mutex); 2114 2115 fcoe = port->priv; 2116 ctlr = fcoe_to_ctlr(fcoe); 2117 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2118 2119 rtnl_lock(); 2120 fcoe_if_destroy(port->lport); 2121 if (!fcoe->removed) 2122 fcoe_interface_remove(fcoe); 2123 rtnl_unlock(); 2124 fcoe_interface_cleanup(fcoe); 2125 2126 mutex_unlock(&fcoe_config_mutex); 2127 2128 fcoe_ctlr_device_delete(cdev); 2129 } 2130 2131 /** 2132 * fcoe_match() - Check if the FCoE is supported on the given netdevice 2133 * @netdev : The net_device object the Ethernet interface to create on 2134 * 2135 * Called from fcoe transport. 2136 * 2137 * Returns: always returns true as this is the default FCoE transport, 2138 * i.e., support all netdevs. 2139 */ 2140 static bool fcoe_match(struct net_device *netdev) 2141 { 2142 return true; 2143 } 2144 2145 /** 2146 * fcoe_dcb_create() - Initialize DCB attributes and hooks 2147 * @netdev: The net_device object of the L2 link that should be queried 2148 * @port: The fcoe_port to bind FCoE APP priority with 2149 * @ 2150 */ 2151 static void fcoe_dcb_create(struct fcoe_interface *fcoe) 2152 { 2153 int ctlr_prio = TC_PRIO_BESTEFFORT; 2154 int fcoe_prio = TC_PRIO_INTERACTIVE; 2155 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2156 #ifdef CONFIG_DCB 2157 int dcbx; 2158 u8 fup, up; 2159 struct net_device *netdev = fcoe->realdev; 2160 struct dcb_app app = { 2161 .priority = 0, 2162 .protocol = ETH_P_FCOE 2163 }; 2164 2165 /* setup DCB priority attributes. */ 2166 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) { 2167 dcbx = netdev->dcbnl_ops->getdcbx(netdev); 2168 2169 if (dcbx & DCB_CAP_DCBX_VER_IEEE) { 2170 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; 2171 up = dcb_ieee_getapp_mask(netdev, &app); 2172 app.protocol = ETH_P_FIP; 2173 fup = dcb_ieee_getapp_mask(netdev, &app); 2174 } else { 2175 app.selector = DCB_APP_IDTYPE_ETHTYPE; 2176 up = dcb_getapp(netdev, &app); 2177 app.protocol = ETH_P_FIP; 2178 fup = dcb_getapp(netdev, &app); 2179 } 2180 2181 fcoe_prio = ffs(up) ? ffs(up) - 1 : 0; 2182 ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio; 2183 } 2184 #endif 2185 fcoe->priority = fcoe_prio; 2186 ctlr->priority = ctlr_prio; 2187 } 2188 2189 enum fcoe_create_link_state { 2190 FCOE_CREATE_LINK_DOWN, 2191 FCOE_CREATE_LINK_UP, 2192 }; 2193 2194 /** 2195 * _fcoe_create() - (internal) Create a fcoe interface 2196 * @netdev : The net_device object the Ethernet interface to create on 2197 * @fip_mode: The FIP mode for this creation 2198 * @link_state: The ctlr link state on creation 2199 * 2200 * Called from either the libfcoe 'create' module parameter 2201 * via fcoe_create or from fcoe_syfs's ctlr_create file. 2202 * 2203 * libfcoe's 'create' module parameter is deprecated so some 2204 * consolidation of code can be done when that interface is 2205 * removed. 2206 */ 2207 static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode, 2208 enum fcoe_create_link_state link_state) 2209 { 2210 int rc = 0; 2211 struct fcoe_ctlr_device *ctlr_dev; 2212 struct fcoe_ctlr *ctlr; 2213 struct fcoe_interface *fcoe; 2214 struct fc_lport *lport; 2215 2216 mutex_lock(&fcoe_config_mutex); 2217 rtnl_lock(); 2218 2219 /* look for existing lport */ 2220 if (fcoe_hostlist_lookup(netdev)) { 2221 rc = -EEXIST; 2222 goto out_nodev; 2223 } 2224 2225 fcoe = fcoe_interface_create(netdev, fip_mode); 2226 if (IS_ERR(fcoe)) { 2227 rc = PTR_ERR(fcoe); 2228 goto out_nodev; 2229 } 2230 2231 ctlr = fcoe_to_ctlr(fcoe); 2232 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr); 2233 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0); 2234 if (IS_ERR(lport)) { 2235 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", 2236 netdev->name); 2237 rc = -EIO; 2238 if (!fcoe->removed) 2239 fcoe_interface_remove(fcoe); 2240 rtnl_unlock(); 2241 fcoe_interface_cleanup(fcoe); 2242 mutex_unlock(&fcoe_config_mutex); 2243 fcoe_ctlr_device_delete(ctlr_dev); 2244 return rc; 2245 } 2246 2247 /* Make this the "master" N_Port */ 2248 ctlr->lp = lport; 2249 2250 /* setup DCB priority attributes. */ 2251 fcoe_dcb_create(fcoe); 2252 2253 /* start FIP Discovery and FLOGI */ 2254 lport->boot_time = jiffies; 2255 fc_fabric_login(lport); 2256 2257 /* 2258 * If the fcoe_ctlr_device is to be set to DISABLED 2259 * it must be done after the lport is added to the 2260 * hostlist, but before the rtnl_lock is released. 2261 * This is because the rtnl_lock protects the 2262 * hostlist that fcoe_device_notification uses. If 2263 * the FCoE Controller is intended to be created 2264 * DISABLED then 'enabled' needs to be considered 2265 * handling link events. 'enabled' must be set 2266 * before the lport can be found in the hostlist 2267 * when a link up event is received. 2268 */ 2269 if (link_state == FCOE_CREATE_LINK_UP) 2270 ctlr_dev->enabled = FCOE_CTLR_ENABLED; 2271 else 2272 ctlr_dev->enabled = FCOE_CTLR_DISABLED; 2273 2274 if (link_state == FCOE_CREATE_LINK_UP && 2275 !fcoe_link_ok(lport)) { 2276 rtnl_unlock(); 2277 fcoe_ctlr_link_up(ctlr); 2278 mutex_unlock(&fcoe_config_mutex); 2279 return rc; 2280 } 2281 2282 out_nodev: 2283 rtnl_unlock(); 2284 mutex_unlock(&fcoe_config_mutex); 2285 2286 return rc; 2287 } 2288 2289 /** 2290 * fcoe_create() - Create a fcoe interface 2291 * @netdev : The net_device object the Ethernet interface to create on 2292 * @fip_mode: The FIP mode for this creation 2293 * 2294 * Called from fcoe transport 2295 * 2296 * Returns: 0 for success 2297 */ 2298 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode) 2299 { 2300 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP); 2301 } 2302 2303 /** 2304 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs 2305 * @netdev: The net_device to be used by the allocated FCoE Controller 2306 * 2307 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr 2308 * in a link_down state. The allows the user an opportunity to configure 2309 * the FCoE Controller from sysfs before enabling the FCoE Controller. 2310 * 2311 * Creating in with this routine starts the FCoE Controller in Fabric 2312 * mode. The user can change to VN2VN or another mode before enabling. 2313 */ 2314 static int fcoe_ctlr_alloc(struct net_device *netdev) 2315 { 2316 return _fcoe_create(netdev, FIP_MODE_FABRIC, 2317 FCOE_CREATE_LINK_DOWN); 2318 } 2319 2320 /** 2321 * fcoe_link_ok() - Check if the link is OK for a local port 2322 * @lport: The local port to check link on 2323 * 2324 * Returns: 0 if link is UP and OK, -1 if not 2325 * 2326 */ 2327 static int fcoe_link_ok(struct fc_lport *lport) 2328 { 2329 struct net_device *netdev = fcoe_netdev(lport); 2330 2331 if (netif_oper_up(netdev)) 2332 return 0; 2333 return -1; 2334 } 2335 2336 /** 2337 * fcoe_percpu_clean() - Clear all pending skbs for an local port 2338 * @lport: The local port whose skbs are to be cleared 2339 * 2340 * Must be called with fcoe_create_mutex held to single-thread completion. 2341 * 2342 * This flushes the pending skbs by flush the work item for each CPU. The work 2343 * item on each possible CPU is flushed because we may have used the per-CPU 2344 * struct of an offline CPU. 2345 */ 2346 static void fcoe_percpu_clean(struct fc_lport *lport) 2347 { 2348 struct fcoe_percpu_s *pp; 2349 unsigned int cpu; 2350 2351 for_each_possible_cpu(cpu) { 2352 pp = &per_cpu(fcoe_percpu, cpu); 2353 2354 flush_work(&pp->work); 2355 } 2356 } 2357 2358 /** 2359 * fcoe_reset() - Reset a local port 2360 * @shost: The SCSI host associated with the local port to be reset 2361 * 2362 * Returns: Always 0 (return value required by FC transport template) 2363 */ 2364 static int fcoe_reset(struct Scsi_Host *shost) 2365 { 2366 struct fc_lport *lport = shost_priv(shost); 2367 struct fcoe_port *port = lport_priv(lport); 2368 struct fcoe_interface *fcoe = port->priv; 2369 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2370 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2371 2372 fcoe_ctlr_link_down(ctlr); 2373 fcoe_clean_pending_queue(ctlr->lp); 2374 2375 if (cdev->enabled != FCOE_CTLR_DISABLED && 2376 !fcoe_link_ok(ctlr->lp)) 2377 fcoe_ctlr_link_up(ctlr); 2378 return 0; 2379 } 2380 2381 /** 2382 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device 2383 * @netdev: The net device used as a key 2384 * 2385 * Locking: Must be called with the RNL mutex held. 2386 * 2387 * Returns: NULL or the FCoE interface 2388 */ 2389 static struct fcoe_interface * 2390 fcoe_hostlist_lookup_port(const struct net_device *netdev) 2391 { 2392 struct fcoe_interface *fcoe; 2393 2394 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 2395 if (fcoe->netdev == netdev) 2396 return fcoe; 2397 } 2398 return NULL; 2399 } 2400 2401 /** 2402 * fcoe_hostlist_lookup() - Find the local port associated with a 2403 * given net device 2404 * @netdev: The netdevice used as a key 2405 * 2406 * Locking: Must be called with the RTNL mutex held 2407 * 2408 * Returns: NULL or the local port 2409 */ 2410 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) 2411 { 2412 struct fcoe_ctlr *ctlr; 2413 struct fcoe_interface *fcoe; 2414 2415 fcoe = fcoe_hostlist_lookup_port(netdev); 2416 ctlr = fcoe_to_ctlr(fcoe); 2417 return (fcoe) ? ctlr->lp : NULL; 2418 } 2419 2420 /** 2421 * fcoe_hostlist_add() - Add the FCoE interface identified by a local 2422 * port to the hostlist 2423 * @lport: The local port that identifies the FCoE interface to be added 2424 * 2425 * Locking: must be called with the RTNL mutex held 2426 * 2427 * Returns: 0 for success 2428 */ 2429 static int fcoe_hostlist_add(const struct fc_lport *lport) 2430 { 2431 struct fcoe_interface *fcoe; 2432 struct fcoe_port *port; 2433 2434 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); 2435 if (!fcoe) { 2436 port = lport_priv(lport); 2437 fcoe = port->priv; 2438 list_add_tail(&fcoe->list, &fcoe_hostlist); 2439 } 2440 return 0; 2441 } 2442 2443 /** 2444 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local 2445 * port to the hostlist 2446 * @lport: The local port that identifies the FCoE interface to be added 2447 * 2448 * Locking: must be called with the RTNL mutex held 2449 * 2450 */ 2451 static void fcoe_hostlist_del(const struct fc_lport *lport) 2452 { 2453 struct fcoe_interface *fcoe; 2454 struct fcoe_port *port; 2455 2456 port = lport_priv(lport); 2457 fcoe = port->priv; 2458 list_del(&fcoe->list); 2459 return; 2460 } 2461 2462 static struct fcoe_transport fcoe_sw_transport = { 2463 .name = {FCOE_TRANSPORT_DEFAULT}, 2464 .attached = false, 2465 .list = LIST_HEAD_INIT(fcoe_sw_transport.list), 2466 .match = fcoe_match, 2467 .alloc = fcoe_ctlr_alloc, 2468 .create = fcoe_create, 2469 .destroy = fcoe_destroy, 2470 .enable = fcoe_enable, 2471 .disable = fcoe_disable, 2472 }; 2473 2474 /** 2475 * fcoe_init() - Initialize fcoe.ko 2476 * 2477 * Returns: 0 on success, or a negative value on failure 2478 */ 2479 static int __init fcoe_init(void) 2480 { 2481 struct fcoe_percpu_s *p; 2482 unsigned int cpu; 2483 int rc = 0; 2484 2485 fcoe_wq = alloc_workqueue("fcoe", 0, 0); 2486 if (!fcoe_wq) 2487 return -ENOMEM; 2488 2489 /* register as a fcoe transport */ 2490 rc = fcoe_transport_attach(&fcoe_sw_transport); 2491 if (rc) { 2492 printk(KERN_ERR "failed to register an fcoe transport, check " 2493 "if libfcoe is loaded\n"); 2494 goto out_destroy; 2495 } 2496 2497 mutex_lock(&fcoe_config_mutex); 2498 2499 for_each_possible_cpu(cpu) { 2500 p = per_cpu_ptr(&fcoe_percpu, cpu); 2501 INIT_WORK(&p->work, fcoe_receive_work); 2502 skb_queue_head_init(&p->fcoe_rx_list); 2503 } 2504 2505 /* Setup link change notification */ 2506 fcoe_dev_setup(); 2507 2508 rc = fcoe_if_init(); 2509 if (rc) 2510 goto out_free; 2511 2512 mutex_unlock(&fcoe_config_mutex); 2513 return 0; 2514 2515 out_free: 2516 mutex_unlock(&fcoe_config_mutex); 2517 out_destroy: 2518 destroy_workqueue(fcoe_wq); 2519 return rc; 2520 } 2521 module_init(fcoe_init); 2522 2523 /** 2524 * fcoe_exit() - Clean up fcoe.ko 2525 * 2526 * Returns: 0 on success or a negative value on failure 2527 */ 2528 static void __exit fcoe_exit(void) 2529 { 2530 struct fcoe_interface *fcoe, *tmp; 2531 struct fcoe_ctlr *ctlr; 2532 struct fcoe_port *port; 2533 unsigned int cpu; 2534 2535 mutex_lock(&fcoe_config_mutex); 2536 2537 fcoe_dev_cleanup(); 2538 2539 /* releases the associated fcoe hosts */ 2540 rtnl_lock(); 2541 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { 2542 ctlr = fcoe_to_ctlr(fcoe); 2543 port = lport_priv(ctlr->lp); 2544 fcoe_hostlist_del(port->lport); 2545 queue_work(fcoe_wq, &port->destroy_work); 2546 } 2547 rtnl_unlock(); 2548 2549 for_each_possible_cpu(cpu) 2550 fcoe_thread_cleanup_local(cpu); 2551 2552 mutex_unlock(&fcoe_config_mutex); 2553 2554 /* 2555 * destroy_work's may be chained but destroy_workqueue() 2556 * can take care of them. Just kill the fcoe_wq. 2557 */ 2558 destroy_workqueue(fcoe_wq); 2559 2560 /* 2561 * Detaching from the scsi transport must happen after all 2562 * destroys are done on the fcoe_wq. destroy_workqueue will 2563 * enusre the fcoe_wq is flushed. 2564 */ 2565 fcoe_if_exit(); 2566 2567 /* detach from fcoe transport */ 2568 fcoe_transport_detach(&fcoe_sw_transport); 2569 } 2570 module_exit(fcoe_exit); 2571 2572 /** 2573 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler 2574 * @seq: active sequence in the FLOGI or FDISC exchange 2575 * @fp: response frame, or error encoded in a pointer (timeout) 2576 * @arg: pointer to the fcoe_ctlr structure 2577 * 2578 * This handles MAC address management for FCoE, then passes control on to 2579 * the libfc FLOGI response handler. 2580 */ 2581 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2582 { 2583 struct fcoe_ctlr *fip = arg; 2584 struct fc_exch *exch = fc_seq_exch(seq); 2585 struct fc_lport *lport = exch->lp; 2586 u8 *mac; 2587 2588 if (IS_ERR(fp)) 2589 goto done; 2590 2591 mac = fr_cb(fp)->granted_mac; 2592 /* pre-FIP */ 2593 if (is_zero_ether_addr(mac)) 2594 fcoe_ctlr_recv_flogi(fip, lport, fp); 2595 if (!is_zero_ether_addr(mac)) 2596 fcoe_update_src_mac(lport, mac); 2597 done: 2598 fc_lport_flogi_resp(seq, fp, lport); 2599 } 2600 2601 /** 2602 * fcoe_logo_resp() - FCoE specific LOGO response handler 2603 * @seq: active sequence in the LOGO exchange 2604 * @fp: response frame, or error encoded in a pointer (timeout) 2605 * @arg: pointer to the fcoe_ctlr structure 2606 * 2607 * This handles MAC address management for FCoE, then passes control on to 2608 * the libfc LOGO response handler. 2609 */ 2610 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2611 { 2612 struct fc_lport *lport = arg; 2613 static u8 zero_mac[ETH_ALEN] = { 0 }; 2614 2615 if (!IS_ERR(fp)) 2616 fcoe_update_src_mac(lport, zero_mac); 2617 fc_lport_logo_resp(seq, fp, lport); 2618 } 2619 2620 /** 2621 * fcoe_elsct_send - FCoE specific ELS handler 2622 * 2623 * This does special case handling of FIP encapsualted ELS exchanges for FCoE, 2624 * using FCoE specific response handlers and passing the FIP controller as 2625 * the argument (the lport is still available from the exchange). 2626 * 2627 * Most of the work here is just handed off to the libfc routine. 2628 */ 2629 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, 2630 struct fc_frame *fp, unsigned int op, 2631 void (*resp)(struct fc_seq *, 2632 struct fc_frame *, 2633 void *), 2634 void *arg, u32 timeout) 2635 { 2636 struct fcoe_port *port = lport_priv(lport); 2637 struct fcoe_interface *fcoe = port->priv; 2638 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 2639 struct fc_frame_header *fh = fc_frame_header_get(fp); 2640 2641 switch (op) { 2642 case ELS_FLOGI: 2643 case ELS_FDISC: 2644 if (lport->point_to_multipoint) 2645 break; 2646 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, 2647 fip, timeout); 2648 case ELS_LOGO: 2649 /* only hook onto fabric logouts, not port logouts */ 2650 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) 2651 break; 2652 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, 2653 lport, timeout); 2654 } 2655 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); 2656 } 2657 2658 /** 2659 * fcoe_vport_create() - create an fc_host/scsi_host for a vport 2660 * @vport: fc_vport object to create a new fc_host for 2661 * @disabled: start the new fc_host in a disabled state by default? 2662 * 2663 * Returns: 0 for success 2664 */ 2665 static int fcoe_vport_create(struct fc_vport *vport, bool disabled) 2666 { 2667 struct Scsi_Host *shost = vport_to_shost(vport); 2668 struct fc_lport *n_port = shost_priv(shost); 2669 struct fcoe_port *port = lport_priv(n_port); 2670 struct fcoe_interface *fcoe = port->priv; 2671 struct net_device *netdev = fcoe->netdev; 2672 struct fc_lport *vn_port; 2673 int rc; 2674 char buf[32]; 2675 2676 rc = fcoe_validate_vport_create(vport); 2677 if (rc) { 2678 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf)); 2679 printk(KERN_ERR "fcoe: Failed to create vport, " 2680 "WWPN (0x%s) already exists\n", 2681 buf); 2682 return rc; 2683 } 2684 2685 mutex_lock(&fcoe_config_mutex); 2686 rtnl_lock(); 2687 vn_port = fcoe_if_create(fcoe, &vport->dev, 1); 2688 rtnl_unlock(); 2689 mutex_unlock(&fcoe_config_mutex); 2690 2691 if (IS_ERR(vn_port)) { 2692 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", 2693 netdev->name); 2694 return -EIO; 2695 } 2696 2697 if (disabled) { 2698 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2699 } else { 2700 vn_port->boot_time = jiffies; 2701 fc_fabric_login(vn_port); 2702 fc_vport_setlink(vn_port); 2703 } 2704 return 0; 2705 } 2706 2707 /** 2708 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport 2709 * @vport: fc_vport object that is being destroyed 2710 * 2711 * Returns: 0 for success 2712 */ 2713 static int fcoe_vport_destroy(struct fc_vport *vport) 2714 { 2715 struct Scsi_Host *shost = vport_to_shost(vport); 2716 struct fc_lport *n_port = shost_priv(shost); 2717 struct fc_lport *vn_port = vport->dd_data; 2718 2719 mutex_lock(&n_port->lp_mutex); 2720 list_del(&vn_port->list); 2721 mutex_unlock(&n_port->lp_mutex); 2722 2723 mutex_lock(&fcoe_config_mutex); 2724 rtnl_lock(); 2725 fcoe_if_destroy(vn_port); 2726 rtnl_unlock(); 2727 mutex_unlock(&fcoe_config_mutex); 2728 2729 return 0; 2730 } 2731 2732 /** 2733 * fcoe_vport_remove() - remove attached vports 2734 * @lport: lport for which the vports should be removed 2735 */ 2736 static void fcoe_vport_remove(struct fc_lport *lport) 2737 { 2738 struct Scsi_Host *shost; 2739 struct fc_host_attrs *fc_host; 2740 unsigned long flags; 2741 struct fc_vport *vport; 2742 struct fc_vport *next_vport; 2743 2744 shost = lport->host; 2745 fc_host = shost_to_fc_host(shost); 2746 2747 /* Loop through all the vports and mark them for deletion */ 2748 spin_lock_irqsave(shost->host_lock, flags); 2749 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2750 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 2751 continue; 2752 } else { 2753 vport->flags |= FC_VPORT_DELETING; 2754 queue_work(fc_host_work_q(shost), 2755 &vport->vport_delete_work); 2756 } 2757 } 2758 spin_unlock_irqrestore(shost->host_lock, flags); 2759 2760 flush_workqueue(fc_host_work_q(shost)); 2761 } 2762 2763 /** 2764 * fcoe_vport_disable() - change vport state 2765 * @vport: vport to bring online/offline 2766 * @disable: should the vport be disabled? 2767 */ 2768 static int fcoe_vport_disable(struct fc_vport *vport, bool disable) 2769 { 2770 struct fc_lport *lport = vport->dd_data; 2771 2772 if (disable) { 2773 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2774 fc_fabric_logoff(lport); 2775 } else { 2776 lport->boot_time = jiffies; 2777 fc_fabric_login(lport); 2778 fc_vport_setlink(lport); 2779 } 2780 2781 return 0; 2782 } 2783 2784 /** 2785 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name 2786 * @vport: fc_vport with a new symbolic name string 2787 * 2788 * After generating a new symbolic name string, a new RSPN_ID request is 2789 * sent to the name server. There is no response handler, so if it fails 2790 * for some reason it will not be retried. 2791 */ 2792 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) 2793 { 2794 struct fc_lport *lport = vport->dd_data; 2795 struct fc_frame *fp; 2796 size_t len; 2797 2798 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 2799 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, 2800 fcoe_netdev(lport)->name, vport->symbolic_name); 2801 2802 if (lport->state != LPORT_ST_READY) 2803 return; 2804 2805 len = strnlen(fc_host_symbolic_name(lport->host), 255); 2806 fp = fc_frame_alloc(lport, 2807 sizeof(struct fc_ct_hdr) + 2808 sizeof(struct fc_ns_rspn) + len); 2809 if (!fp) 2810 return; 2811 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, 2812 NULL, NULL, 3 * lport->r_a_tov); 2813 } 2814 2815 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev) 2816 { 2817 struct fcoe_ctlr_device *ctlr_dev = 2818 fcoe_fcf_dev_to_ctlr_dev(fcf_dev); 2819 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2820 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2821 2822 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev); 2823 } 2824 2825 /** 2826 * fcoe_set_port_id() - Callback from libfc when Port_ID is set. 2827 * @lport: the local port 2828 * @port_id: the port ID 2829 * @fp: the received frame, if any, that caused the port_id to be set. 2830 * 2831 * This routine handles the case where we received a FLOGI and are 2832 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() 2833 * so it can set the non-mapped mode and gateway address. 2834 * 2835 * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). 2836 */ 2837 static void fcoe_set_port_id(struct fc_lport *lport, 2838 u32 port_id, struct fc_frame *fp) 2839 { 2840 struct fcoe_port *port = lport_priv(lport); 2841 struct fcoe_interface *fcoe = port->priv; 2842 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2843 2844 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) 2845 fcoe_ctlr_recv_flogi(ctlr, lport, fp); 2846 } 2847