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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.4 *5 * Maintained at www.Open-FCoE.org6 */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 40MODULE_AUTHOR("Open-FCoE.org");41MODULE_DESCRIPTION("FCoE");42MODULE_LICENSE("GPL v2");43 44/* Performance tuning parameters for fcoe */45static unsigned int fcoe_ddp_min = 4096;46module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);47MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \48 "Direct Data Placement (DDP).");49 50unsigned int fcoe_debug_logging;51module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);52MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");53 54static unsigned int fcoe_e_d_tov = 2 * 1000;55module_param_named(e_d_tov, fcoe_e_d_tov, int, S_IRUGO|S_IWUSR);56MODULE_PARM_DESC(e_d_tov, "E_D_TOV in ms, default 2000");57 58static unsigned int fcoe_r_a_tov = 2 * 2 * 1000;59module_param_named(r_a_tov, fcoe_r_a_tov, int, S_IRUGO|S_IWUSR);60MODULE_PARM_DESC(r_a_tov, "R_A_TOV in ms, default 4000");61 62static DEFINE_MUTEX(fcoe_config_mutex);63 64static struct workqueue_struct *fcoe_wq;65 66/* fcoe host list */67/* must only by accessed under the RTNL mutex */68static LIST_HEAD(fcoe_hostlist);69static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);70 71/* Function Prototypes */72static int fcoe_reset(struct Scsi_Host *);73static int fcoe_xmit(struct fc_lport *, struct fc_frame *);74static int fcoe_rcv(struct sk_buff *, struct net_device *,75 struct packet_type *, struct net_device *);76static void fcoe_percpu_clean(struct fc_lport *);77static int fcoe_link_ok(struct fc_lport *);78 79static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);80static int fcoe_hostlist_add(const struct fc_lport *);81static void fcoe_hostlist_del(const struct fc_lport *);82 83static int fcoe_device_notification(struct notifier_block *, ulong, void *);84static void fcoe_dev_setup(void);85static void fcoe_dev_cleanup(void);86static struct fcoe_interface87*fcoe_hostlist_lookup_port(const struct net_device *);88 89static int fcoe_fip_recv(struct sk_buff *, struct net_device *,90 struct packet_type *, struct net_device *);91static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *,92 struct packet_type *, struct net_device *);93 94static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);95static void fcoe_update_src_mac(struct fc_lport *, u8 *);96static u8 *fcoe_get_src_mac(struct fc_lport *);97static void fcoe_destroy_work(struct work_struct *);98 99static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,100 unsigned int);101static int fcoe_ddp_done(struct fc_lport *, u16);102static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,103 unsigned int);104static int fcoe_dcb_app_notification(struct notifier_block *notifier,105 ulong event, void *ptr);106 107static bool fcoe_match(struct net_device *netdev);108static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode);109static int fcoe_destroy(struct net_device *netdev);110static int fcoe_enable(struct net_device *netdev);111static int fcoe_disable(struct net_device *netdev);112 113/* fcoe_syfs control interface handlers */114static int fcoe_ctlr_alloc(struct net_device *netdev);115static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);116static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev);117 118static 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);125static void fcoe_recv_frame(struct sk_buff *skb);126 127/* notification function for packets from net device */128static struct notifier_block fcoe_notifier = {129 .notifier_call = fcoe_device_notification,130};131 132/* notification function for DCB events */133static struct notifier_block dcb_notifier = {134 .notifier_call = fcoe_dcb_app_notification,135};136 137static struct scsi_transport_template *fcoe_nport_scsi_transport;138static struct scsi_transport_template *fcoe_vport_scsi_transport;139 140static int fcoe_vport_destroy(struct fc_vport *);141static int fcoe_vport_create(struct fc_vport *, bool disabled);142static int fcoe_vport_disable(struct fc_vport *, bool disable);143static void fcoe_set_vport_symbolic_name(struct fc_vport *);144static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);145static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);146static void fcoe_vport_remove(struct fc_lport *);147 148static 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 162static 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 172static 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 220static 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 263static const struct scsi_host_template fcoe_shost_template = {264 .module = THIS_MODULE,265 .name = "FCoE Driver",266 .proc_name = FCOE_NAME,267 .queuecommand = fc_queuecommand,268 .eh_timed_out = fc_eh_timed_out,269 .eh_abort_handler = fc_eh_abort,270 .eh_device_reset_handler = fc_eh_device_reset,271 .eh_host_reset_handler = fc_eh_host_reset,272 .slave_alloc = fc_slave_alloc,273 .change_queue_depth = scsi_change_queue_depth,274 .this_id = -1,275 .cmd_per_lun = 3,276 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,277 .sg_tablesize = SG_ALL,278 .max_sectors = 0xffff,279 .track_queue_depth = 1,280 .cmd_size = sizeof(struct libfc_cmd_priv),281};282 283/**284 * fcoe_interface_setup() - Setup a FCoE interface285 * @fcoe: The new FCoE interface286 * @netdev: The net device that the fcoe interface is on287 *288 * Returns : 0 for success289 * Locking: must be called with the RTNL mutex held290 */291static int fcoe_interface_setup(struct fcoe_interface *fcoe,292 struct net_device *netdev)293{294 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);295 struct netdev_hw_addr *ha;296 struct net_device *real_dev;297 static const u8 flogi_maddr[ETH_ALEN] = FC_FCOE_FLOGI_MAC;298 const struct net_device_ops *ops;299 300 fcoe->netdev = netdev;301 302 /* Let LLD initialize for FCoE */303 ops = netdev->netdev_ops;304 if (ops->ndo_fcoe_enable) {305 if (ops->ndo_fcoe_enable(netdev))306 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"307 " specific feature for LLD.\n");308 }309 310 /* Do not support for bonding device */311 if (netif_is_bond_master(netdev)) {312 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");313 return -EOPNOTSUPP;314 }315 316 /* look for SAN MAC address, if multiple SAN MACs exist, only317 * use the first one for SPMA */318 real_dev = is_vlan_dev(netdev) ? vlan_dev_real_dev(netdev) : netdev;319 fcoe->realdev = real_dev;320 rcu_read_lock();321 for_each_dev_addr(real_dev, ha) {322 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&323 (is_valid_ether_addr(ha->addr))) {324 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);325 fip->spma = 1;326 break;327 }328 }329 rcu_read_unlock();330 331 /* setup Source Mac Address */332 if (!fip->spma)333 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);334 335 /*336 * Add FCoE MAC address as second unicast MAC address337 * or enter promiscuous mode if not capable of listening338 * for multiple unicast MACs.339 */340 dev_uc_add(netdev, flogi_maddr);341 if (fip->spma)342 dev_uc_add(netdev, fip->ctl_src_addr);343 if (fip->mode == FIP_MODE_VN2VN) {344 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);345 dev_mc_add(netdev, FIP_ALL_P2P_MACS);346 } else347 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);348 349 /*350 * setup the receive function from ethernet driver351 * on the ethertype for the given device352 */353 fcoe->fcoe_packet_type.func = fcoe_rcv;354 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE);355 fcoe->fcoe_packet_type.dev = netdev;356 dev_add_pack(&fcoe->fcoe_packet_type);357 358 fcoe->fip_packet_type.func = fcoe_fip_recv;359 fcoe->fip_packet_type.type = htons(ETH_P_FIP);360 fcoe->fip_packet_type.dev = netdev;361 dev_add_pack(&fcoe->fip_packet_type);362 363 if (netdev != real_dev) {364 fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv;365 fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP);366 fcoe->fip_vlan_packet_type.dev = real_dev;367 dev_add_pack(&fcoe->fip_vlan_packet_type);368 }369 return 0;370}371 372/**373 * fcoe_interface_create() - Create a FCoE interface on a net device374 * @netdev: The net device to create the FCoE interface on375 * @fip_mode: The mode to use for FIP376 *377 * Returns: pointer to a struct fcoe_interface or NULL on error378 */379static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,380 enum fip_mode fip_mode)381{382 struct fcoe_ctlr_device *ctlr_dev;383 struct fcoe_ctlr *ctlr;384 struct fcoe_interface *fcoe;385 int size;386 int err;387 388 if (!try_module_get(THIS_MODULE)) {389 FCOE_NETDEV_DBG(netdev,390 "Could not get a reference to the module\n");391 fcoe = ERR_PTR(-EBUSY);392 goto out;393 }394 395 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);396 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,397 size);398 if (!ctlr_dev) {399 FCOE_DBG("Failed to add fcoe_ctlr_device\n");400 fcoe = ERR_PTR(-ENOMEM);401 goto out_putmod;402 }403 404 ctlr = fcoe_ctlr_device_priv(ctlr_dev);405 ctlr->cdev = ctlr_dev;406 fcoe = fcoe_ctlr_priv(ctlr);407 408 dev_hold(netdev);409 410 /*411 * Initialize FIP.412 */413 fcoe_ctlr_init(ctlr, fip_mode);414 ctlr->send = fcoe_fip_send;415 ctlr->update_mac = fcoe_update_src_mac;416 ctlr->get_src_addr = fcoe_get_src_mac;417 418 err = fcoe_interface_setup(fcoe, netdev);419 if (err) {420 fcoe_ctlr_destroy(ctlr);421 fcoe_ctlr_device_delete(ctlr_dev);422 dev_put(netdev);423 fcoe = ERR_PTR(err);424 goto out_putmod;425 }426 427 goto out;428 429out_putmod:430 module_put(THIS_MODULE);431out:432 return fcoe;433}434 435/**436 * fcoe_interface_remove() - remove FCoE interface from netdev437 * @fcoe: The FCoE interface to be cleaned up438 *439 * Caller must be holding the RTNL mutex440 */441static void fcoe_interface_remove(struct fcoe_interface *fcoe)442{443 struct net_device *netdev = fcoe->netdev;444 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);445 static const u8 flogi_maddr[ETH_ALEN] = FC_FCOE_FLOGI_MAC;446 const struct net_device_ops *ops;447 448 /*449 * Don't listen for Ethernet packets anymore.450 * synchronize_net() ensures that the packet handlers are not running451 * on another CPU. dev_remove_pack() would do that, this calls the452 * unsyncronized version __dev_remove_pack() to avoid multiple delays.453 */454 __dev_remove_pack(&fcoe->fcoe_packet_type);455 __dev_remove_pack(&fcoe->fip_packet_type);456 if (netdev != fcoe->realdev)457 __dev_remove_pack(&fcoe->fip_vlan_packet_type);458 synchronize_net();459 460 /* Delete secondary MAC addresses */461 dev_uc_del(netdev, flogi_maddr);462 if (fip->spma)463 dev_uc_del(netdev, fip->ctl_src_addr);464 if (fip->mode == FIP_MODE_VN2VN) {465 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);466 dev_mc_del(netdev, FIP_ALL_P2P_MACS);467 } else468 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);469 470 /* Tell the LLD we are done w/ FCoE */471 ops = netdev->netdev_ops;472 if (ops->ndo_fcoe_disable) {473 if (ops->ndo_fcoe_disable(netdev))474 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"475 " specific feature for LLD.\n");476 }477 fcoe->removed = 1;478}479 480 481/**482 * fcoe_interface_cleanup() - Clean up a FCoE interface483 * @fcoe: The FCoE interface to be cleaned up484 */485static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)486{487 struct net_device *netdev = fcoe->netdev;488 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);489 490 /* Release the self-reference taken during fcoe_interface_create() */491 /* tear-down the FCoE controller */492 fcoe_ctlr_destroy(fip);493 scsi_host_put(fip->lp->host);494 dev_put(netdev);495 module_put(THIS_MODULE);496}497 498/**499 * fcoe_fip_recv() - Handler for received FIP frames500 * @skb: The receive skb501 * @netdev: The associated net device502 * @ptype: The packet_type structure which was used to register this handler503 * @orig_dev: The original net_device the skb was received on.504 * (in case dev is a bond)505 *506 * Returns: 0 for success507 */508static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,509 struct packet_type *ptype,510 struct net_device *orig_dev)511{512 struct fcoe_interface *fcoe;513 struct fcoe_ctlr *ctlr;514 515 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);516 ctlr = fcoe_to_ctlr(fcoe);517 fcoe_ctlr_recv(ctlr, skb);518 return 0;519}520 521/**522 * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames523 * @skb: The receive skb524 * @netdev: The associated net device525 * @ptype: The packet_type structure which was used to register this handler526 * @orig_dev: The original net_device the skb was received on.527 * (in case dev is a bond)528 *529 * Returns: 0 for success530 */531static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev,532 struct packet_type *ptype,533 struct net_device *orig_dev)534{535 struct fcoe_interface *fcoe;536 struct fcoe_ctlr *ctlr;537 538 fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type);539 ctlr = fcoe_to_ctlr(fcoe);540 fcoe_ctlr_recv(ctlr, skb);541 return 0;542}543 544/**545 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame546 * @port: The FCoE port547 * @skb: The FIP/FCoE packet to be sent548 */549static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)550{551 if (port->fcoe_pending_queue.qlen)552 fcoe_check_wait_queue(port->lport, skb);553 else if (fcoe_start_io(skb))554 fcoe_check_wait_queue(port->lport, skb);555}556 557/**558 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame559 * @fip: The FCoE controller560 * @skb: The FIP packet to be sent561 */562static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)563{564 struct fcoe_interface *fcoe = fcoe_from_ctlr(fip);565 struct fip_frame {566 struct ethhdr eth;567 struct fip_header fip;568 } __packed *frame;569 570 /*571 * Use default VLAN for FIP VLAN discovery protocol572 */573 frame = (struct fip_frame *)skb->data;574 if (ntohs(frame->eth.h_proto) == ETH_P_FIP &&575 ntohs(frame->fip.fip_op) == FIP_OP_VLAN &&576 fcoe->realdev != fcoe->netdev)577 skb->dev = fcoe->realdev;578 else579 skb->dev = fcoe->netdev;580 fcoe_port_send(lport_priv(fip->lp), skb);581}582 583/**584 * fcoe_update_src_mac() - Update the Ethernet MAC filters585 * @lport: The local port to update the source MAC on586 * @addr: Unicast MAC address to add587 *588 * Remove any previously-set unicast MAC filter.589 * Add secondary FCoE MAC address filter for our OUI.590 */591static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)592{593 struct fcoe_port *port = lport_priv(lport);594 struct fcoe_interface *fcoe = port->priv;595 596 if (!is_zero_ether_addr(port->data_src_addr))597 dev_uc_del(fcoe->netdev, port->data_src_addr);598 if (!is_zero_ether_addr(addr))599 dev_uc_add(fcoe->netdev, addr);600 memcpy(port->data_src_addr, addr, ETH_ALEN);601}602 603/**604 * fcoe_get_src_mac() - return the Ethernet source address for an lport605 * @lport: libfc lport606 */607static u8 *fcoe_get_src_mac(struct fc_lport *lport)608{609 struct fcoe_port *port = lport_priv(lport);610 611 return port->data_src_addr;612}613 614/**615 * fcoe_lport_config() - Set up a local port616 * @lport: The local port to be setup617 *618 * Returns: 0 for success619 */620static int fcoe_lport_config(struct fc_lport *lport)621{622 lport->link_up = 0;623 lport->qfull = 0;624 lport->max_retry_count = 3;625 lport->max_rport_retry_count = 3;626 lport->e_d_tov = fcoe_e_d_tov;627 lport->r_a_tov = fcoe_r_a_tov;628 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |629 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);630 lport->does_npiv = 1;631 632 fc_lport_init_stats(lport);633 634 /* lport fc_lport related configuration */635 fc_lport_config(lport);636 637 /* offload related configuration */638 lport->crc_offload = 0;639 lport->seq_offload = 0;640 lport->lro_enabled = 0;641 lport->lro_xid = 0;642 lport->lso_max = 0;643 644 return 0;645}646 647/*648 * fcoe_netdev_features_change - Updates the lport's offload flags based649 * on the LLD netdev's FCoE feature flags650 */651static void fcoe_netdev_features_change(struct fc_lport *lport,652 struct net_device *netdev)653{654 mutex_lock(&lport->lp_mutex);655 656 if (netdev->features & NETIF_F_SG)657 lport->sg_supp = 1;658 else659 lport->sg_supp = 0;660 661 if (netdev->features & NETIF_F_FCOE_CRC) {662 lport->crc_offload = 1;663 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");664 } else {665 lport->crc_offload = 0;666 }667 668 if (netdev->features & NETIF_F_FSO) {669 lport->seq_offload = 1;670 lport->lso_max = min(netdev->gso_max_size, GSO_LEGACY_MAX_SIZE);671 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",672 lport->lso_max);673 } else {674 lport->seq_offload = 0;675 lport->lso_max = 0;676 }677 678 if (netdev->fcoe_ddp_xid) {679 lport->lro_enabled = 1;680 lport->lro_xid = netdev->fcoe_ddp_xid;681 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",682 lport->lro_xid);683 } else {684 lport->lro_enabled = 0;685 lport->lro_xid = 0;686 }687 688 mutex_unlock(&lport->lp_mutex);689}690 691/**692 * fcoe_netdev_config() - Set up net devive for SW FCoE693 * @lport: The local port that is associated with the net device694 * @netdev: The associated net device695 *696 * Must be called after fcoe_lport_config() as it will use local port mutex697 *698 * Returns: 0 for success699 */700static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)701{702 u32 mfs;703 u64 wwnn, wwpn;704 struct fcoe_interface *fcoe;705 struct fcoe_ctlr *ctlr;706 struct fcoe_port *port;707 708 /* Setup lport private data to point to fcoe softc */709 port = lport_priv(lport);710 fcoe = port->priv;711 ctlr = fcoe_to_ctlr(fcoe);712 713 /* Figure out the VLAN ID, if any */714 if (is_vlan_dev(netdev))715 lport->vlan = vlan_dev_vlan_id(netdev);716 else717 lport->vlan = 0;718 719 /*720 * Determine max frame size based on underlying device and optional721 * user-configured limit. If the MFS is too low, fcoe_link_ok()722 * will return 0, so do this first.723 */724 mfs = netdev->mtu;725 if (netdev->fcoe_mtu) {726 mfs = FCOE_MTU;727 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);728 }729 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));730 if (fc_set_mfs(lport, mfs))731 return -EINVAL;732 733 /* offload features support */734 fcoe_netdev_features_change(lport, netdev);735 736 skb_queue_head_init(&port->fcoe_pending_queue);737 port->fcoe_pending_queue_active = 0;738 timer_setup(&port->timer, fcoe_queue_timer, 0);739 740 fcoe_link_speed_update(lport);741 742 if (!lport->vport) {743 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))744 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);745 fc_set_wwnn(lport, wwnn);746 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))747 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,748 2, 0);749 fc_set_wwpn(lport, wwpn);750 }751 752 return 0;753}754 755/**756 * fcoe_shost_config() - Set up the SCSI host associated with a local port757 * @lport: The local port758 * @dev: The device associated with the SCSI host759 *760 * Must be called after fcoe_lport_config() and fcoe_netdev_config()761 *762 * Returns: 0 for success763 */764static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)765{766 int rc = 0;767 768 /* lport scsi host config */769 lport->host->max_lun = FCOE_MAX_LUN;770 lport->host->max_id = FCOE_MAX_FCP_TARGET;771 lport->host->max_channel = 0;772 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;773 774 if (lport->vport)775 lport->host->transportt = fcoe_vport_scsi_transport;776 else777 lport->host->transportt = fcoe_nport_scsi_transport;778 779 /* add the new host to the SCSI-ml */780 rc = scsi_add_host(lport->host, dev);781 if (rc) {782 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "783 "error on scsi_add_host\n");784 return rc;785 }786 787 if (!lport->vport)788 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;789 790 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,791 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,792 fcoe_netdev(lport)->name);793 794 return 0;795}796 797 798/**799 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE800 * @lport: The local port that is associated with the net device801 * @netdev: The associated net device802 *803 * Must be called after fcoe_shost_config() as it will use local port mutex804 *805 */806static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)807{808 struct fcoe_interface *fcoe;809 struct fcoe_port *port;810 struct net_device *realdev;811 int rc;812 813 port = lport_priv(lport);814 fcoe = port->priv;815 realdev = fcoe->realdev;816 817 /* No FDMI state m/c for NPIV ports */818 if (lport->vport)819 return;820 821 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {822 struct netdev_fcoe_hbainfo *fdmi;823 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);824 if (!fdmi)825 return;826 827 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,828 fdmi);829 if (rc) {830 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "831 "information from netdev.\n");832 return;833 }834 835 snprintf(fc_host_serial_number(lport->host),836 FC_SERIAL_NUMBER_SIZE,837 "%s",838 fdmi->serial_number);839 snprintf(fc_host_manufacturer(lport->host),840 FC_SERIAL_NUMBER_SIZE,841 "%s",842 fdmi->manufacturer);843 snprintf(fc_host_model(lport->host),844 FC_SYMBOLIC_NAME_SIZE,845 "%s",846 fdmi->model);847 snprintf(fc_host_model_description(lport->host),848 FC_SYMBOLIC_NAME_SIZE,849 "%s",850 fdmi->model_description);851 snprintf(fc_host_hardware_version(lport->host),852 FC_VERSION_STRING_SIZE,853 "%s",854 fdmi->hardware_version);855 snprintf(fc_host_driver_version(lport->host),856 FC_VERSION_STRING_SIZE,857 "%s",858 fdmi->driver_version);859 snprintf(fc_host_optionrom_version(lport->host),860 FC_VERSION_STRING_SIZE,861 "%s",862 fdmi->optionrom_version);863 snprintf(fc_host_firmware_version(lport->host),864 FC_VERSION_STRING_SIZE,865 "%s",866 fdmi->firmware_version);867 868 /* Enable FDMI lport states */869 lport->fdmi_enabled = 1;870 kfree(fdmi);871 } else {872 lport->fdmi_enabled = 0;873 printk(KERN_INFO "fcoe: No FDMI support.\n");874 }875}876 877/**878 * fcoe_oem_match() - The match routine for the offloaded exchange manager879 * @fp: The I/O frame880 *881 * This routine will be associated with an exchange manager (EM). When882 * the libfc exchange handling code is looking for an EM to use it will883 * call this routine and pass it the frame that it wishes to send. This884 * routine will return True if the associated EM is to be used and False885 * if the echange code should continue looking for an EM.886 *887 * The offload EM that this routine is associated with will handle any888 * packets that are for SCSI read requests.889 *890 * This has been enhanced to work when FCoE stack is operating in target891 * mode.892 *893 * Returns: True for read types I/O, otherwise returns false.894 */895static bool fcoe_oem_match(struct fc_frame *fp)896{897 struct fc_frame_header *fh = fc_frame_header_get(fp);898 struct fcp_cmnd *fcp;899 900 if (fc_fcp_is_read(fr_fsp(fp)) &&901 (fr_fsp(fp)->data_len > fcoe_ddp_min))902 return true;903 else if ((fr_fsp(fp) == NULL) &&904 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&905 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {906 fcp = fc_frame_payload_get(fp, sizeof(*fcp));907 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&908 (ntohl(fcp->fc_dl) > fcoe_ddp_min))909 return true;910 }911 return false;912}913 914/**915 * fcoe_em_config() - Allocate and configure an exchange manager916 * @lport: The local port that the new EM will be associated with917 *918 * Returns: 0 on success919 */920static inline int fcoe_em_config(struct fc_lport *lport)921{922 struct fcoe_port *port = lport_priv(lport);923 struct fcoe_interface *fcoe = port->priv;924 struct fcoe_interface *oldfcoe = NULL;925 struct net_device *old_real_dev, *cur_real_dev;926 u16 min_xid = FCOE_MIN_XID;927 u16 max_xid = FCOE_MAX_XID;928 929 /*930 * Check if need to allocate an em instance for931 * offload exchange ids to be shared across all VN_PORTs/lport.932 */933 if (!lport->lro_enabled || !lport->lro_xid ||934 (lport->lro_xid >= max_xid)) {935 lport->lro_xid = 0;936 goto skip_oem;937 }938 939 /*940 * Reuse existing offload em instance in case941 * it is already allocated on real eth device942 */943 if (is_vlan_dev(fcoe->netdev))944 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);945 else946 cur_real_dev = fcoe->netdev;947 948 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {949 if (is_vlan_dev(oldfcoe->netdev))950 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);951 else952 old_real_dev = oldfcoe->netdev;953 954 if (cur_real_dev == old_real_dev) {955 fcoe->oem = oldfcoe->oem;956 break;957 }958 }959 960 if (fcoe->oem) {961 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {962 printk(KERN_ERR "fcoe_em_config: failed to add "963 "offload em:%p on interface:%s\n",964 fcoe->oem, fcoe->netdev->name);965 return -ENOMEM;966 }967 } else {968 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,969 FCOE_MIN_XID, lport->lro_xid,970 fcoe_oem_match);971 if (!fcoe->oem) {972 printk(KERN_ERR "fcoe_em_config: failed to allocate "973 "em for offload exches on interface:%s\n",974 fcoe->netdev->name);975 return -ENOMEM;976 }977 }978 979 /*980 * Exclude offload EM xid range from next EM xid range.981 */982 min_xid += lport->lro_xid + 1;983 984skip_oem:985 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {986 printk(KERN_ERR "fcoe_em_config: failed to "987 "allocate em on interface %s\n", fcoe->netdev->name);988 return -ENOMEM;989 }990 991 return 0;992}993 994/**995 * fcoe_if_destroy() - Tear down a SW FCoE instance996 * @lport: The local port to be destroyed997 *998 * Locking: Must be called with the RTNL mutex held.999 *1000 */1001static void fcoe_if_destroy(struct fc_lport *lport)1002{1003 struct fcoe_port *port = lport_priv(lport);1004 struct fcoe_interface *fcoe = port->priv;1005 struct net_device *netdev = fcoe->netdev;1006 1007 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");1008 1009 /* Logout of the fabric */1010 fc_fabric_logoff(lport);1011 1012 /* Cleanup the fc_lport */1013 fc_lport_destroy(lport);1014 1015 /* Stop the transmit retry timer */1016 del_timer_sync(&port->timer);1017 1018 /* Free existing transmit skbs */1019 fcoe_clean_pending_queue(lport);1020 1021 if (!is_zero_ether_addr(port->data_src_addr))1022 dev_uc_del(netdev, port->data_src_addr);1023 if (lport->vport)1024 synchronize_net();1025 else1026 fcoe_interface_remove(fcoe);1027 1028 /* Free queued packets for the per-CPU receive threads */1029 fcoe_percpu_clean(lport);1030 1031 /* Detach from the scsi-ml */1032 fc_remove_host(lport->host);1033 scsi_remove_host(lport->host);1034 1035 /* Destroy lport scsi_priv */1036 fc_fcp_destroy(lport);1037 1038 /* There are no more rports or I/O, free the EM */1039 fc_exch_mgr_free(lport);1040 1041 /* Free memory used by statistical counters */1042 fc_lport_free_stats(lport);1043 1044 /*1045 * Release the Scsi_Host for vport but hold on to1046 * master lport until it fcoe interface fully cleaned-up.1047 */1048 if (lport->vport)1049 scsi_host_put(lport->host);1050}1051 1052/**1053 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device1054 * @lport: The local port to setup DDP for1055 * @xid: The exchange ID for this DDP transfer1056 * @sgl: The scatterlist describing this transfer1057 * @sgc: The number of sg items1058 *1059 * Returns: 0 if the DDP context was not configured1060 */1061static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,1062 struct scatterlist *sgl, unsigned int sgc)1063{1064 struct net_device *netdev = fcoe_netdev(lport);1065 1066 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)1067 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,1068 xid, sgl,1069 sgc);1070 1071 return 0;1072}1073 1074/**1075 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device1076 * @lport: The local port to setup DDP for1077 * @xid: The exchange ID for this DDP transfer1078 * @sgl: The scatterlist describing this transfer1079 * @sgc: The number of sg items1080 *1081 * Returns: 0 if the DDP context was not configured1082 */1083static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,1084 struct scatterlist *sgl, unsigned int sgc)1085{1086 struct net_device *netdev = fcoe_netdev(lport);1087 1088 if (netdev->netdev_ops->ndo_fcoe_ddp_target)1089 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,1090 sgl, sgc);1091 1092 return 0;1093}1094 1095 1096/**1097 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device1098 * @lport: The local port to complete DDP on1099 * @xid: The exchange ID for this DDP transfer1100 *1101 * Returns: the length of data that have been completed by DDP1102 */1103static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)1104{1105 struct net_device *netdev = fcoe_netdev(lport);1106 1107 if (netdev->netdev_ops->ndo_fcoe_ddp_done)1108 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);1109 return 0;1110}1111 1112/**1113 * fcoe_if_create() - Create a FCoE instance on an interface1114 * @fcoe: The FCoE interface to create a local port on1115 * @parent: The device pointer to be the parent in sysfs for the SCSI host1116 * @npiv: Indicates if the port is a vport or not1117 *1118 * Creates a fc_lport instance and a Scsi_Host instance and configure them.1119 *1120 * Returns: The allocated fc_lport or an error pointer1121 */1122static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,1123 struct device *parent, int npiv)1124{1125 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);1126 struct net_device *netdev = fcoe->netdev;1127 struct fc_lport *lport, *n_port;1128 struct fcoe_port *port;1129 struct Scsi_Host *shost;1130 int rc;1131 /*1132 * parent is only a vport if npiv is 1,1133 * but we'll only use vport in that case so go ahead and set it1134 */1135 struct fc_vport *vport = dev_to_vport(parent);1136 1137 FCOE_NETDEV_DBG(netdev, "Create Interface\n");1138 1139 if (!npiv)1140 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));1141 else1142 lport = libfc_vport_create(vport, sizeof(*port));1143 1144 if (!lport) {1145 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");1146 rc = -ENOMEM;1147 goto out;1148 }1149 port = lport_priv(lport);1150 port->lport = lport;1151 port->priv = fcoe;1152 port->get_netdev = fcoe_netdev;1153 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;1154 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;1155 INIT_WORK(&port->destroy_work, fcoe_destroy_work);1156 1157 /*1158 * Need to add the lport to the hostlist1159 * so we catch NETDEV_CHANGE events.1160 */1161 fcoe_hostlist_add(lport);1162 1163 /* configure a fc_lport including the exchange manager */1164 rc = fcoe_lport_config(lport);1165 if (rc) {1166 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "1167 "interface\n");1168 goto out_host_put;1169 }1170 1171 if (npiv) {1172 FCOE_NETDEV_DBG(netdev, "Setting vport names, "1173 "%16.16llx %16.16llx\n",1174 vport->node_name, vport->port_name);1175 fc_set_wwnn(lport, vport->node_name);1176 fc_set_wwpn(lport, vport->port_name);1177 }1178 1179 /* configure lport network properties */1180 rc = fcoe_netdev_config(lport, netdev);1181 if (rc) {1182 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "1183 "interface\n");1184 goto out_lp_destroy;1185 }1186 1187 /* configure lport scsi host properties */1188 rc = fcoe_shost_config(lport, parent);1189 if (rc) {1190 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "1191 "interface\n");1192 goto out_lp_destroy;1193 }1194 1195 /* Initialize the library */1196 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);1197 if (rc) {1198 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "1199 "interface\n");1200 goto out_lp_destroy;1201 }1202 1203 /* Initialized FDMI information */1204 fcoe_fdmi_info(lport, netdev);1205 1206 /*1207 * fcoe_em_alloc() and fcoe_hostlist_add() both1208 * need to be atomic with respect to other changes to the1209 * hostlist since fcoe_em_alloc() looks for an existing EM1210 * instance on host list updated by fcoe_hostlist_add().1211 *1212 * This is currently handled through the fcoe_config_mutex1213 * begin held.1214 */1215 if (!npiv)1216 /* lport exch manager allocation */1217 rc = fcoe_em_config(lport);1218 else {1219 shost = vport_to_shost(vport);1220 n_port = shost_priv(shost);1221 rc = fc_exch_mgr_list_clone(n_port, lport);1222 }1223 1224 if (rc) {1225 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");1226 goto out_lp_destroy;1227 }1228 1229 return lport;1230 1231out_lp_destroy:1232 fc_exch_mgr_free(lport);1233out_host_put:1234 fcoe_hostlist_del(lport);1235 scsi_host_put(lport->host);1236out:1237 return ERR_PTR(rc);1238}1239 1240/**1241 * fcoe_if_init() - Initialization routine for fcoe.ko1242 *1243 * Attaches the SW FCoE transport to the FC transport1244 *1245 * Returns: 0 on success1246 */1247static int __init fcoe_if_init(void)1248{1249 /* attach to scsi transport */1250 fcoe_nport_scsi_transport =1251 fc_attach_transport(&fcoe_nport_fc_functions);1252 if (!fcoe_nport_scsi_transport)1253 goto err;1254 1255 fcoe_vport_scsi_transport =1256 fc_attach_transport(&fcoe_vport_fc_functions);1257 if (!fcoe_vport_scsi_transport)1258 goto err_vport;1259 1260 return 0;1261 1262err_vport:1263 fc_release_transport(fcoe_nport_scsi_transport);1264err:1265 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");1266 return -ENODEV;1267}1268 1269/**1270 * fcoe_if_exit() - Tear down fcoe.ko1271 *1272 * Detaches the SW FCoE transport from the FC transport1273 *1274 * Returns: 0 on success1275 */1276static int __exit fcoe_if_exit(void)1277{1278 fc_release_transport(fcoe_nport_scsi_transport);1279 fc_release_transport(fcoe_vport_scsi_transport);1280 fcoe_nport_scsi_transport = NULL;1281 fcoe_vport_scsi_transport = NULL;1282 return 0;1283}1284 1285static void fcoe_thread_cleanup_local(unsigned int cpu)1286{1287 struct page *crc_eof;1288 struct fcoe_percpu_s *p;1289 1290 p = per_cpu_ptr(&fcoe_percpu, cpu);1291 spin_lock_bh(&p->fcoe_rx_list.lock);1292 crc_eof = p->crc_eof_page;1293 p->crc_eof_page = NULL;1294 p->crc_eof_offset = 0;1295 spin_unlock_bh(&p->fcoe_rx_list.lock);1296 1297 if (crc_eof)1298 put_page(crc_eof);1299 flush_work(&p->work);1300}1301 1302/**1303 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming1304 * command.1305 *1306 * This routine selects next CPU based on cpumask to distribute1307 * incoming requests in round robin.1308 *1309 * Returns: int CPU number1310 */1311static inline unsigned int fcoe_select_cpu(void)1312{1313 static unsigned int selected_cpu;1314 1315 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);1316 if (selected_cpu >= nr_cpu_ids)1317 selected_cpu = cpumask_first(cpu_online_mask);1318 1319 return selected_cpu;1320}1321 1322/**1323 * fcoe_rcv() - Receive packets from a net device1324 * @skb: The received packet1325 * @netdev: The net device that the packet was received on1326 * @ptype: The packet type context1327 * @olddev: The last device net device1328 *1329 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a1330 * FC frame and passes the frame to libfc.1331 *1332 * Returns: 0 for success1333 */1334static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,1335 struct packet_type *ptype, struct net_device *olddev)1336{1337 struct fc_lport *lport;1338 struct fcoe_rcv_info *fr;1339 struct fcoe_ctlr *ctlr;1340 struct fcoe_interface *fcoe;1341 struct fc_frame_header *fh;1342 struct fcoe_percpu_s *fps;1343 struct ethhdr *eh;1344 unsigned int cpu;1345 1346 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);1347 ctlr = fcoe_to_ctlr(fcoe);1348 lport = ctlr->lp;1349 if (unlikely(!lport)) {1350 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");1351 goto err2;1352 }1353 if (!lport->link_up)1354 goto err2;1355 1356 FCOE_NETDEV_DBG(netdev,1357 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",1358 skb->len, skb->data_len, skb->head, skb->data,1359 skb_tail_pointer(skb), skb_end_pointer(skb),1360 skb->csum, skb->dev ? skb->dev->name : "<NULL>");1361 1362 1363 skb = skb_share_check(skb, GFP_ATOMIC);1364 1365 if (skb == NULL)1366 return NET_RX_DROP;1367 1368 eh = eth_hdr(skb);1369 1370 if (is_fip_mode(ctlr) &&1371 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {1372 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",1373 eh->h_source);1374 goto err;1375 }1376 1377 /*1378 * Check for minimum frame length, and make sure required FCoE1379 * and FC headers are pulled into the linear data area.1380 */1381 if (unlikely((skb->len < FCOE_MIN_FRAME) ||1382 !pskb_may_pull(skb, FCOE_HEADER_LEN)))1383 goto err;1384 1385 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));1386 fh = (struct fc_frame_header *) skb_transport_header(skb);1387 1388 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {1389 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",1390 eh->h_dest);1391 goto err;1392 }1393 1394 fr = fcoe_dev_from_skb(skb);1395 fr->fr_dev = lport;1396 1397 /*1398 * In case the incoming frame's exchange is originated from1399 * the initiator, then received frame's exchange id is ANDed1400 * with fc_cpu_mask bits to get the same cpu on which exchange1401 * was originated, otherwise select cpu using rx exchange id1402 * or fcoe_select_cpu().1403 */1404 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)1405 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;1406 else {1407 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)1408 cpu = fcoe_select_cpu();1409 else1410 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;1411 }1412 1413 if (cpu >= nr_cpu_ids)1414 goto err;1415 1416 fps = &per_cpu(fcoe_percpu, cpu);1417 spin_lock(&fps->fcoe_rx_list.lock);1418 /*1419 * We now have a valid CPU that we're targeting for1420 * this skb. We also have this receive thread locked,1421 * so we're free to queue skbs into it's queue.1422 */1423 1424 /*1425 * Note: We used to have a set of conditions under which we would1426 * call fcoe_recv_frame directly, rather than queuing to the rx list1427 * as it could save a few cycles, but doing so is prohibited, as1428 * fcoe_recv_frame has several paths that may sleep, which is forbidden1429 * in softirq context.1430 */1431 __skb_queue_tail(&fps->fcoe_rx_list, skb);1432 schedule_work_on(cpu, &fps->work);1433 spin_unlock(&fps->fcoe_rx_list.lock);1434 1435 return NET_RX_SUCCESS;1436err:1437 this_cpu_inc(lport->stats->ErrorFrames);1438err2:1439 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 CRC1445 * @skb: The packet to be transmitted1446 * @tlen: The total length of the trailer1447 *1448 * Returns: 0 for success1449 */1450static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)1451{1452 struct fcoe_percpu_s *fps;1453 int rc;1454 1455 local_lock(&fcoe_percpu.lock);1456 fps = this_cpu_ptr(&fcoe_percpu);1457 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);1458 local_unlock(&fcoe_percpu.lock);1459 1460 return rc;1461}1462 1463/**1464 * fcoe_xmit() - Transmit a FCoE frame1465 * @lport: The local port that the frame is to be transmitted for1466 * @fp: The frame to be transmitted1467 *1468 * Return: 0 for success1469 */1470static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)1471{1472 int wlen;1473 u32 crc;1474 struct ethhdr *eh;1475 struct fcoe_crc_eof *cp;1476 struct sk_buff *skb;1477 struct fc_frame_header *fh;1478 unsigned int hlen; /* header length implies the version */1479 unsigned int tlen; /* trailer length */1480 unsigned int elen; /* eth header, may include vlan */1481 struct fcoe_port *port = lport_priv(lport);1482 struct fcoe_interface *fcoe = port->priv;1483 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);1484 u8 sof, eof;1485 struct fcoe_hdr *hp;1486 1487 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);1488 1489 fh = fc_frame_header_get(fp);1490 skb = fp_skb(fp);1491 1492 if (!lport->link_up) {1493 kfree_skb(skb);1494 return 0;1495 }1496 1497 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&1498 fcoe_ctlr_els_send(ctlr, lport, skb))1499 return 0;1500 1501 sof = fr_sof(fp);1502 eof = fr_eof(fp);1503 1504 elen = sizeof(struct ethhdr);1505 hlen = sizeof(struct fcoe_hdr);1506 tlen = sizeof(struct fcoe_crc_eof);1507 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;1508 1509 /* crc offload */1510 if (likely(lport->crc_offload)) {1511 skb->ip_summed = CHECKSUM_PARTIAL;1512 skb->csum_start = skb_headroom(skb);1513 skb->csum_offset = skb->len;1514 crc = 0;1515 } else {1516 skb->ip_summed = CHECKSUM_NONE;1517 crc = fcoe_fc_crc(fp);1518 }1519 1520 /* copy port crc and eof to the skb buff */1521 if (skb_is_nonlinear(skb)) {1522 skb_frag_t *frag;1523 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {1524 kfree_skb(skb);1525 return -ENOMEM;1526 }1527 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];1528 cp = kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag);1529 } else {1530 cp = skb_put(skb, tlen);1531 }1532 1533 memset(cp, 0, sizeof(*cp));1534 cp->fcoe_eof = eof;1535 cp->fcoe_crc32 = cpu_to_le32(~crc);1536 1537 if (skb_is_nonlinear(skb)) {1538 kunmap_atomic(cp);1539 cp = NULL;1540 }1541 1542 /* adjust skb network/transport offsets to match mac/fcoe/port */1543 skb_push(skb, elen + hlen);1544 skb_reset_mac_header(skb);1545 skb_reset_network_header(skb);1546 skb->mac_len = elen;1547 skb->protocol = htons(ETH_P_FCOE);1548 skb->priority = fcoe->priority;1549 1550 if (is_vlan_dev(fcoe->netdev) &&1551 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {1552 /* must set skb->dev before calling vlan_put_tag */1553 skb->dev = fcoe->realdev;1554 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),1555 vlan_dev_vlan_id(fcoe->netdev));1556 } else1557 skb->dev = fcoe->netdev;1558 1559 /* fill up mac and fcoe headers */1560 eh = eth_hdr(skb);1561 eh->h_proto = htons(ETH_P_FCOE);1562 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);1563 if (ctlr->map_dest)1564 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);1565 1566 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))1567 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);1568 else1569 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);1570 1571 hp = (struct fcoe_hdr *)(eh + 1);1572 memset(hp, 0, sizeof(*hp));1573 if (FC_FCOE_VER)1574 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);1575 hp->fcoe_sof = sof;1576 1577 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */1578 if (lport->seq_offload && fr_max_payload(fp)) {1579 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;1580 skb_shinfo(skb)->gso_size = fr_max_payload(fp);1581 } else {1582 skb_shinfo(skb)->gso_type = 0;1583 skb_shinfo(skb)->gso_size = 0;1584 }1585 /* update tx stats: regardless if LLD fails */1586 this_cpu_inc(lport->stats->TxFrames);1587 this_cpu_add(lport->stats->TxWords, wlen);1588 1589 /* send down to lld */1590 fr_dev(fp) = lport;1591 fcoe_port_send(port, skb);1592 return 0;1593}1594 1595/**1596 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC1597 * @lport: The local port the frame was received on1598 * @fp: The received frame1599 *1600 * Return: 0 on passing filtering checks1601 */1602static inline int fcoe_filter_frames(struct fc_lport *lport,1603 struct fc_frame *fp)1604{1605 struct fcoe_ctlr *ctlr;1606 struct fcoe_interface *fcoe;1607 struct fc_frame_header *fh;1608 struct sk_buff *skb = (struct sk_buff *)fp;1609 1610 /*1611 * We only check CRC if no offload is available and if it is1612 * it's solicited data, in which case, the FCP layer would1613 * check it during the copy.1614 */1615 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)1616 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;1617 else1618 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;1619 1620 fh = fc_frame_header_get(fp);1621 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)1622 return 0;1623 1624 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;1625 ctlr = fcoe_to_ctlr(fcoe);1626 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&1627 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {1628 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");1629 return -EINVAL;1630 }1631 1632 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||1633 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {1634 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;1635 return 0;1636 }1637 1638 if (this_cpu_inc_return(lport->stats->InvalidCRCCount) < 5)1639 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");1640 return -EINVAL;1641}1642 1643/**1644 * fcoe_recv_frame() - process a single received frame1645 * @skb: frame to process1646 */1647static void fcoe_recv_frame(struct sk_buff *skb)1648{1649 u32 fr_len;1650 struct fc_lport *lport;1651 struct fcoe_rcv_info *fr;1652 struct fcoe_crc_eof crc_eof;1653 struct fc_frame *fp;1654 struct fcoe_hdr *hp;1655 1656 fr = fcoe_dev_from_skb(skb);1657 lport = fr->fr_dev;1658 if (unlikely(!lport)) {1659 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");1660 kfree_skb(skb);1661 return;1662 }1663 1664 FCOE_NETDEV_DBG(skb->dev,1665 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",1666 skb->len, skb->data_len,1667 skb->head, skb->data, skb_tail_pointer(skb),1668 skb_end_pointer(skb), skb->csum,1669 skb->dev ? skb->dev->name : "<NULL>");1670 1671 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */1672 1673 /*1674 * Frame length checks and setting up the header pointers1675 * was done in fcoe_rcv already.1676 */1677 hp = (struct fcoe_hdr *) skb_network_header(skb);1678 1679 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {1680 struct fc_stats *stats;1681 1682 stats = per_cpu_ptr(lport->stats, raw_smp_processor_id());1683 if (READ_ONCE(stats->ErrorFrames) < 5)1684 printk(KERN_WARNING "fcoe: FCoE version "1685 "mismatch: The frame has "1686 "version %x, but the "1687 "initiator supports version "1688 "%x\n", FC_FCOE_DECAPS_VER(hp),1689 FC_FCOE_VER);1690 goto drop;1691 }1692 1693 skb_pull(skb, sizeof(struct fcoe_hdr));1694 fr_len = skb->len - sizeof(struct fcoe_crc_eof);1695 1696 this_cpu_inc(lport->stats->RxFrames);1697 this_cpu_add(lport->stats->RxWords, fr_len / FCOE_WORD_TO_BYTE);1698 1699 fp = (struct fc_frame *)skb;1700 fc_frame_init(fp);1701 fr_dev(fp) = lport;1702 fr_sof(fp) = hp->fcoe_sof;1703 1704 /* Copy out the CRC and EOF trailer for access */1705 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))1706 goto drop;1707 fr_eof(fp) = crc_eof.fcoe_eof;1708 fr_crc(fp) = crc_eof.fcoe_crc32;1709 if (pskb_trim(skb, fr_len))1710 goto drop;1711 1712 if (!fcoe_filter_frames(lport, fp)) {1713 fc_exch_recv(lport, fp);1714 return;1715 }1716drop:1717 this_cpu_inc(lport->stats->ErrorFrames);1718 kfree_skb(skb);1719}1720 1721/**1722 * fcoe_receive_work() - The per-CPU worker1723 * @work: The work struct1724 *1725 */1726static void fcoe_receive_work(struct work_struct *work)1727{1728 struct fcoe_percpu_s *p;1729 struct sk_buff *skb;1730 struct sk_buff_head tmp;1731 1732 p = container_of(work, struct fcoe_percpu_s, work);1733 skb_queue_head_init(&tmp);1734 1735 spin_lock_bh(&p->fcoe_rx_list.lock);1736 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);1737 spin_unlock_bh(&p->fcoe_rx_list.lock);1738 1739 if (!skb_queue_len(&tmp))1740 return;1741 1742 while ((skb = __skb_dequeue(&tmp)))1743 fcoe_recv_frame(skb);1744}1745 1746/**1747 * fcoe_dev_setup() - Setup the link change notification interface1748 */1749static void fcoe_dev_setup(void)1750{1751 register_dcbevent_notifier(&dcb_notifier);1752 register_netdevice_notifier(&fcoe_notifier);1753}1754 1755/**1756 * fcoe_dev_cleanup() - Cleanup the link change notification interface1757 */1758static void fcoe_dev_cleanup(void)1759{1760 unregister_dcbevent_notifier(&dcb_notifier);1761 unregister_netdevice_notifier(&fcoe_notifier);1762}1763 1764static struct fcoe_interface *1765fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)1766{1767 struct fcoe_interface *fcoe;1768 struct net_device *real_dev;1769 1770 list_for_each_entry(fcoe, &fcoe_hostlist, list) {1771 if (is_vlan_dev(fcoe->netdev))1772 real_dev = vlan_dev_real_dev(fcoe->netdev);1773 else1774 real_dev = fcoe->netdev;1775 1776 if (netdev == real_dev)1777 return fcoe;1778 }1779 return NULL;1780}1781 1782static int fcoe_dcb_app_notification(struct notifier_block *notifier,1783 ulong event, void *ptr)1784{1785 struct dcb_app_type *entry = ptr;1786 struct fcoe_ctlr *ctlr;1787 struct fcoe_interface *fcoe;1788 struct net_device *netdev;1789 int prio;1790 1791 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)1792 return NOTIFY_OK;1793 1794 netdev = dev_get_by_index(&init_net, entry->ifindex);1795 if (!netdev)1796 return NOTIFY_OK;1797 1798 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);1799 dev_put(netdev);1800 if (!fcoe)1801 return NOTIFY_OK;1802 1803 ctlr = fcoe_to_ctlr(fcoe);1804 1805 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)1806 prio = ffs(entry->app.priority) - 1;1807 else1808 prio = entry->app.priority;1809 1810 if (prio < 0)1811 return NOTIFY_OK;1812 1813 if (entry->app.protocol == ETH_P_FIP ||1814 entry->app.protocol == ETH_P_FCOE)1815 ctlr->priority = prio;1816 1817 if (entry->app.protocol == ETH_P_FCOE)1818 fcoe->priority = prio;1819 1820 return NOTIFY_OK;1821}1822 1823/**1824 * fcoe_device_notification() - Handler for net device events1825 * @notifier: The context of the notification1826 * @event: The type of event1827 * @ptr: The net device that the event was on1828 *1829 * This function is called by the Ethernet driver in case of link change event.1830 *1831 * Returns: 0 for success1832 */1833static int fcoe_device_notification(struct notifier_block *notifier,1834 ulong event, void *ptr)1835{1836 struct fcoe_ctlr_device *cdev;1837 struct fc_lport *lport = NULL;1838 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);1839 struct fcoe_ctlr *ctlr;1840 struct fcoe_interface *fcoe;1841 u32 link_possible = 1;1842 u32 mfs;1843 int rc = NOTIFY_OK;1844 1845 list_for_each_entry(fcoe, &fcoe_hostlist, list) {1846 if (fcoe->netdev == netdev) {1847 ctlr = fcoe_to_ctlr(fcoe);1848 lport = ctlr->lp;1849 break;1850 }1851 }1852 if (!lport) {1853 rc = NOTIFY_DONE;1854 goto out;1855 }1856 1857 switch (event) {1858 case NETDEV_DOWN:1859 case NETDEV_GOING_DOWN:1860 link_possible = 0;1861 break;1862 case NETDEV_UP:1863 case NETDEV_CHANGE:1864 break;1865 case NETDEV_CHANGEMTU:1866 if (netdev->fcoe_mtu)1867 break;1868 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +1869 sizeof(struct fcoe_crc_eof));1870 if (mfs >= FC_MIN_MAX_FRAME)1871 fc_set_mfs(lport, mfs);1872 break;1873 case NETDEV_REGISTER:1874 break;1875 case NETDEV_UNREGISTER:1876 list_del(&fcoe->list);1877 fcoe_vport_remove(lport);1878 mutex_lock(&fcoe_config_mutex);1879 fcoe_if_destroy(lport);1880 if (!fcoe->removed)1881 fcoe_interface_remove(fcoe);1882 fcoe_interface_cleanup(fcoe);1883 mutex_unlock(&fcoe_config_mutex);1884 fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr));1885 goto out;1886 case NETDEV_FEAT_CHANGE:1887 fcoe_netdev_features_change(lport, netdev);1888 break;1889 default:1890 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "1891 "from netdev netlink\n", event);1892 }1893 1894 fcoe_link_speed_update(lport);1895 1896 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);1897 1898 if (link_possible && !fcoe_link_ok(lport)) {1899 switch (cdev->enabled) {1900 case FCOE_CTLR_DISABLED:1901 pr_info("Link up while interface is disabled.\n");1902 break;1903 case FCOE_CTLR_ENABLED:1904 case FCOE_CTLR_UNUSED:1905 fcoe_ctlr_link_up(ctlr);1906 }1907 } else if (fcoe_ctlr_link_down(ctlr)) {1908 switch (cdev->enabled) {1909 case FCOE_CTLR_DISABLED:1910 pr_info("Link down while interface is disabled.\n");1911 break;1912 case FCOE_CTLR_ENABLED:1913 case FCOE_CTLR_UNUSED:1914 this_cpu_inc(lport->stats->LinkFailureCount);1915 fcoe_clean_pending_queue(lport);1916 }1917 }1918out:1919 return rc;1920}1921 1922/**1923 * fcoe_disable() - Disables a FCoE interface1924 * @netdev : The net_device object the Ethernet interface to create on1925 *1926 * Called from fcoe transport.1927 *1928 * Returns: 0 for success1929 *1930 * Deprecated: use fcoe_ctlr_enabled()1931 */1932static int fcoe_disable(struct net_device *netdev)1933{1934 struct fcoe_ctlr *ctlr;1935 struct fcoe_interface *fcoe;1936 int rc = 0;1937 1938 mutex_lock(&fcoe_config_mutex);1939 1940 rtnl_lock();1941 fcoe = fcoe_hostlist_lookup_port(netdev);1942 rtnl_unlock();1943 1944 if (fcoe) {1945 ctlr = fcoe_to_ctlr(fcoe);1946 fcoe_ctlr_link_down(ctlr);1947 fcoe_clean_pending_queue(ctlr->lp);1948 } else1949 rc = -ENODEV;1950 1951 mutex_unlock(&fcoe_config_mutex);1952 return rc;1953}1954 1955/**1956 * fcoe_enable() - Enables a FCoE interface1957 * @netdev : The net_device object the Ethernet interface to create on1958 *1959 * Called from fcoe transport.1960 *1961 * Returns: 0 for success1962 */1963static int fcoe_enable(struct net_device *netdev)1964{1965 struct fcoe_ctlr *ctlr;1966 struct fcoe_interface *fcoe;1967 int rc = 0;1968 1969 mutex_lock(&fcoe_config_mutex);1970 rtnl_lock();1971 fcoe = fcoe_hostlist_lookup_port(netdev);1972 rtnl_unlock();1973 1974 if (!fcoe) {1975 rc = -ENODEV;1976 goto out;1977 }1978 1979 ctlr = fcoe_to_ctlr(fcoe);1980 1981 if (!fcoe_link_ok(ctlr->lp))1982 fcoe_ctlr_link_up(ctlr);1983 1984out:1985 mutex_unlock(&fcoe_config_mutex);1986 return rc;1987}1988 1989/**1990 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller1991 * @cdev: The FCoE Controller that is being enabled or disabled1992 *1993 * fcoe_sysfs will ensure that the state of 'enabled' has1994 * changed, so no checking is necessary here. This routine simply1995 * calls fcoe_enable or fcoe_disable, both of which are deprecated.1996 * When those routines are removed the functionality can be merged1997 * here.1998 */1999static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)2000{2001 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);2002 struct fc_lport *lport = ctlr->lp;2003 struct net_device *netdev = fcoe_netdev(lport);2004 2005 switch (cdev->enabled) {2006 case FCOE_CTLR_ENABLED:2007 return fcoe_enable(netdev);2008 case FCOE_CTLR_DISABLED:2009 return fcoe_disable(netdev);2010 case FCOE_CTLR_UNUSED:2011 default:2012 return -ENOTSUPP;2013 }2014}2015 2016/**2017 * fcoe_ctlr_mode() - Switch FIP mode2018 * @ctlr_dev: The FCoE Controller that is being modified2019 *2020 * When the FIP mode has been changed we need to update2021 * the multicast addresses to ensure we get the correct2022 * frames.2023 */2024static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev)2025{2026 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);2027 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);2028 2029 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN &&2030 ctlr->mode != FIP_MODE_VN2VN) {2031 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS);2032 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS);2033 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS);2034 } else if (ctlr->mode != FIP_MODE_FABRIC) {2035 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS);2036 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS);2037 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS);2038 }2039 fcoe_ctlr_set_fip_mode(ctlr_dev);2040}2041 2042/**2043 * fcoe_destroy() - Destroy a FCoE interface2044 * @netdev : The net_device object the Ethernet interface to create on2045 *2046 * Called from fcoe transport2047 *2048 * Returns: 0 for success2049 */2050static int fcoe_destroy(struct net_device *netdev)2051{2052 struct fcoe_ctlr *ctlr;2053 struct fcoe_interface *fcoe;2054 struct fc_lport *lport;2055 struct fcoe_port *port;2056 int rc = 0;2057 2058 mutex_lock(&fcoe_config_mutex);2059 rtnl_lock();2060 fcoe = fcoe_hostlist_lookup_port(netdev);2061 if (!fcoe) {2062 rc = -ENODEV;2063 goto out_nodev;2064 }2065 ctlr = fcoe_to_ctlr(fcoe);2066 lport = ctlr->lp;2067 port = lport_priv(lport);2068 list_del(&fcoe->list);2069 queue_work(fcoe_wq, &port->destroy_work);2070out_nodev:2071 rtnl_unlock();2072 mutex_unlock(&fcoe_config_mutex);2073 return rc;2074}2075 2076/**2077 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context2078 * @work: Handle to the FCoE port to be destroyed2079 */2080static void fcoe_destroy_work(struct work_struct *work)2081{2082 struct fcoe_ctlr_device *cdev;2083 struct fcoe_ctlr *ctlr;2084 struct fcoe_port *port;2085 struct fcoe_interface *fcoe;2086 2087 port = container_of(work, struct fcoe_port, destroy_work);2088 2089 fcoe_vport_remove(port->lport);2090 2091 mutex_lock(&fcoe_config_mutex);2092 2093 fcoe = port->priv;2094 ctlr = fcoe_to_ctlr(fcoe);2095 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);2096 2097 rtnl_lock();2098 fcoe_if_destroy(port->lport);2099 if (!fcoe->removed)2100 fcoe_interface_remove(fcoe);2101 rtnl_unlock();2102 fcoe_interface_cleanup(fcoe);2103 2104 mutex_unlock(&fcoe_config_mutex);2105 2106 fcoe_ctlr_device_delete(cdev);2107}2108 2109/**2110 * fcoe_match() - Check if the FCoE is supported on the given netdevice2111 * @netdev : The net_device object the Ethernet interface to create on2112 *2113 * Called from fcoe transport.2114 *2115 * Returns: always returns true as this is the default FCoE transport,2116 * i.e., support all netdevs.2117 */2118static bool fcoe_match(struct net_device *netdev)2119{2120 return true;2121}2122 2123/**2124 * fcoe_dcb_create() - Initialize DCB attributes and hooks2125 * @fcoe: The new FCoE interface2126 */2127static void fcoe_dcb_create(struct fcoe_interface *fcoe)2128{2129 int ctlr_prio = TC_PRIO_BESTEFFORT;2130 int fcoe_prio = TC_PRIO_INTERACTIVE;2131 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);2132#ifdef CONFIG_DCB2133 int dcbx;2134 u8 fup, up;2135 struct net_device *netdev = fcoe->realdev;2136 struct dcb_app app = {2137 .priority = 0,2138 .protocol = ETH_P_FCOE2139 };2140 2141 /* setup DCB priority attributes. */2142 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {2143 dcbx = netdev->dcbnl_ops->getdcbx(netdev);2144 2145 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {2146 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;2147 up = dcb_ieee_getapp_mask(netdev, &app);2148 app.protocol = ETH_P_FIP;2149 fup = dcb_ieee_getapp_mask(netdev, &app);2150 } else {2151 app.selector = DCB_APP_IDTYPE_ETHTYPE;2152 up = dcb_getapp(netdev, &app);2153 app.protocol = ETH_P_FIP;2154 fup = dcb_getapp(netdev, &app);2155 }2156 2157 fcoe_prio = ffs(up) ? ffs(up) - 1 : 0;2158 ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio;2159 }2160#endif2161 fcoe->priority = fcoe_prio;2162 ctlr->priority = ctlr_prio;2163}2164 2165enum fcoe_create_link_state {2166 FCOE_CREATE_LINK_DOWN,2167 FCOE_CREATE_LINK_UP,2168};2169 2170/**2171 * _fcoe_create() - (internal) Create a fcoe interface2172 * @netdev : The net_device object the Ethernet interface to create on2173 * @fip_mode: The FIP mode for this creation2174 * @link_state: The ctlr link state on creation2175 *2176 * Called from either the libfcoe 'create' module parameter2177 * via fcoe_create or from fcoe_syfs's ctlr_create file.2178 *2179 * libfcoe's 'create' module parameter is deprecated so some2180 * consolidation of code can be done when that interface is2181 * removed.2182 */2183static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode,2184 enum fcoe_create_link_state link_state)2185{2186 int rc = 0;2187 struct fcoe_ctlr_device *ctlr_dev;2188 struct fcoe_ctlr *ctlr;2189 struct fcoe_interface *fcoe;2190 struct fc_lport *lport;2191 2192 mutex_lock(&fcoe_config_mutex);2193 rtnl_lock();2194 2195 /* look for existing lport */2196 if (fcoe_hostlist_lookup(netdev)) {2197 rc = -EEXIST;2198 goto out_nodev;2199 }2200 2201 fcoe = fcoe_interface_create(netdev, fip_mode);2202 if (IS_ERR(fcoe)) {2203 rc = PTR_ERR(fcoe);2204 goto out_nodev;2205 }2206 2207 ctlr = fcoe_to_ctlr(fcoe);2208 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);2209 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);2210 if (IS_ERR(lport)) {2211 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",2212 netdev->name);2213 rc = -EIO;2214 if (!fcoe->removed)2215 fcoe_interface_remove(fcoe);2216 rtnl_unlock();2217 fcoe_interface_cleanup(fcoe);2218 mutex_unlock(&fcoe_config_mutex);2219 fcoe_ctlr_device_delete(ctlr_dev);2220 return rc;2221 }2222 2223 /* Make this the "master" N_Port */2224 ctlr->lp = lport;2225 2226 /* setup DCB priority attributes. */2227 fcoe_dcb_create(fcoe);2228 2229 /* start FIP Discovery and FLOGI */2230 lport->boot_time = jiffies;2231 fc_fabric_login(lport);2232 2233 /*2234 * If the fcoe_ctlr_device is to be set to DISABLED2235 * it must be done after the lport is added to the2236 * hostlist, but before the rtnl_lock is released.2237 * This is because the rtnl_lock protects the2238 * hostlist that fcoe_device_notification uses. If2239 * the FCoE Controller is intended to be created2240 * DISABLED then 'enabled' needs to be considered2241 * handling link events. 'enabled' must be set2242 * before the lport can be found in the hostlist2243 * when a link up event is received.2244 */2245 if (link_state == FCOE_CREATE_LINK_UP)2246 ctlr_dev->enabled = FCOE_CTLR_ENABLED;2247 else2248 ctlr_dev->enabled = FCOE_CTLR_DISABLED;2249 2250 if (link_state == FCOE_CREATE_LINK_UP &&2251 !fcoe_link_ok(lport)) {2252 rtnl_unlock();2253 fcoe_ctlr_link_up(ctlr);2254 mutex_unlock(&fcoe_config_mutex);2255 return rc;2256 }2257 2258out_nodev:2259 rtnl_unlock();2260 mutex_unlock(&fcoe_config_mutex);2261 2262 return rc;2263}2264 2265/**2266 * fcoe_create() - Create a fcoe interface2267 * @netdev : The net_device object the Ethernet interface to create on2268 * @fip_mode: The FIP mode for this creation2269 *2270 * Called from fcoe transport2271 *2272 * Returns: 0 for success2273 */2274static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode)2275{2276 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);2277}2278 2279/**2280 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs2281 * @netdev: The net_device to be used by the allocated FCoE Controller2282 *2283 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr2284 * in a link_down state. The allows the user an opportunity to configure2285 * the FCoE Controller from sysfs before enabling the FCoE Controller.2286 *2287 * Creating in with this routine starts the FCoE Controller in Fabric2288 * mode. The user can change to VN2VN or another mode before enabling.2289 */2290static int fcoe_ctlr_alloc(struct net_device *netdev)2291{2292 return _fcoe_create(netdev, FIP_MODE_FABRIC,2293 FCOE_CREATE_LINK_DOWN);2294}2295 2296/**2297 * fcoe_link_ok() - Check if the link is OK for a local port2298 * @lport: The local port to check link on2299 *2300 * Returns: 0 if link is UP and OK, -1 if not2301 *2302 */2303static int fcoe_link_ok(struct fc_lport *lport)2304{2305 struct net_device *netdev = fcoe_netdev(lport);2306 2307 if (netif_oper_up(netdev))2308 return 0;2309 return -1;2310}2311 2312/**2313 * fcoe_percpu_clean() - Clear all pending skbs for an local port2314 * @lport: The local port whose skbs are to be cleared2315 *2316 * Must be called with fcoe_create_mutex held to single-thread completion.2317 *2318 * This flushes the pending skbs by flush the work item for each CPU. The work2319 * item on each possible CPU is flushed because we may have used the per-CPU2320 * struct of an offline CPU.2321 */2322static void fcoe_percpu_clean(struct fc_lport *lport)2323{2324 struct fcoe_percpu_s *pp;2325 unsigned int cpu;2326 2327 for_each_possible_cpu(cpu) {2328 pp = &per_cpu(fcoe_percpu, cpu);2329 2330 flush_work(&pp->work);2331 }2332}2333 2334/**2335 * fcoe_reset() - Reset a local port2336 * @shost: The SCSI host associated with the local port to be reset2337 *2338 * Returns: Always 0 (return value required by FC transport template)2339 */2340static int fcoe_reset(struct Scsi_Host *shost)2341{2342 struct fc_lport *lport = shost_priv(shost);2343 struct fcoe_port *port = lport_priv(lport);2344 struct fcoe_interface *fcoe = port->priv;2345 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);2346 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);2347 2348 fcoe_ctlr_link_down(ctlr);2349 fcoe_clean_pending_queue(ctlr->lp);2350 2351 if (cdev->enabled != FCOE_CTLR_DISABLED &&2352 !fcoe_link_ok(ctlr->lp))2353 fcoe_ctlr_link_up(ctlr);2354 return 0;2355}2356 2357/**2358 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device2359 * @netdev: The net device used as a key2360 *2361 * Locking: Must be called with the RNL mutex held.2362 *2363 * Returns: NULL or the FCoE interface2364 */2365static struct fcoe_interface *2366fcoe_hostlist_lookup_port(const struct net_device *netdev)2367{2368 struct fcoe_interface *fcoe;2369 2370 list_for_each_entry(fcoe, &fcoe_hostlist, list) {2371 if (fcoe->netdev == netdev)2372 return fcoe;2373 }2374 return NULL;2375}2376 2377/**2378 * fcoe_hostlist_lookup() - Find the local port associated with a2379 * given net device2380 * @netdev: The netdevice used as a key2381 *2382 * Locking: Must be called with the RTNL mutex held2383 *2384 * Returns: NULL or the local port2385 */2386static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)2387{2388 struct fcoe_ctlr *ctlr;2389 struct fcoe_interface *fcoe;2390 2391 fcoe = fcoe_hostlist_lookup_port(netdev);2392 ctlr = fcoe_to_ctlr(fcoe);2393 return (fcoe) ? ctlr->lp : NULL;2394}2395 2396/**2397 * fcoe_hostlist_add() - Add the FCoE interface identified by a local2398 * port to the hostlist2399 * @lport: The local port that identifies the FCoE interface to be added2400 *2401 * Locking: must be called with the RTNL mutex held2402 *2403 * Returns: 0 for success2404 */2405static int fcoe_hostlist_add(const struct fc_lport *lport)2406{2407 struct fcoe_interface *fcoe;2408 struct fcoe_port *port;2409 2410 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));2411 if (!fcoe) {2412 port = lport_priv(lport);2413 fcoe = port->priv;2414 list_add_tail(&fcoe->list, &fcoe_hostlist);2415 }2416 return 0;2417}2418 2419/**2420 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local2421 * port to the hostlist2422 * @lport: The local port that identifies the FCoE interface to be added2423 *2424 * Locking: must be called with the RTNL mutex held2425 *2426 */2427static void fcoe_hostlist_del(const struct fc_lport *lport)2428{2429 struct fcoe_interface *fcoe;2430 struct fcoe_port *port;2431 2432 port = lport_priv(lport);2433 fcoe = port->priv;2434 list_del(&fcoe->list);2435 return;2436}2437 2438static struct fcoe_transport fcoe_sw_transport = {2439 .name = {FCOE_TRANSPORT_DEFAULT},2440 .attached = false,2441 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),2442 .match = fcoe_match,2443 .alloc = fcoe_ctlr_alloc,2444 .create = fcoe_create,2445 .destroy = fcoe_destroy,2446 .enable = fcoe_enable,2447 .disable = fcoe_disable,2448};2449 2450/**2451 * fcoe_init() - Initialize fcoe.ko2452 *2453 * Returns: 0 on success, or a negative value on failure2454 */2455static int __init fcoe_init(void)2456{2457 struct fcoe_percpu_s *p;2458 unsigned int cpu;2459 int rc = 0;2460 2461 fcoe_wq = alloc_workqueue("fcoe", 0, 0);2462 if (!fcoe_wq)2463 return -ENOMEM;2464 2465 /* register as a fcoe transport */2466 rc = fcoe_transport_attach(&fcoe_sw_transport);2467 if (rc) {2468 printk(KERN_ERR "failed to register an fcoe transport, check "2469 "if libfcoe is loaded\n");2470 goto out_destroy;2471 }2472 2473 mutex_lock(&fcoe_config_mutex);2474 2475 for_each_possible_cpu(cpu) {2476 p = per_cpu_ptr(&fcoe_percpu, cpu);2477 INIT_WORK(&p->work, fcoe_receive_work);2478 skb_queue_head_init(&p->fcoe_rx_list);2479 local_lock_init(&p->lock);2480 }2481 2482 /* Setup link change notification */2483 fcoe_dev_setup();2484 2485 rc = fcoe_if_init();2486 if (rc)2487 goto out_free;2488 2489 mutex_unlock(&fcoe_config_mutex);2490 return 0;2491 2492out_free:2493 mutex_unlock(&fcoe_config_mutex);2494 fcoe_transport_detach(&fcoe_sw_transport);2495out_destroy:2496 destroy_workqueue(fcoe_wq);2497 return rc;2498}2499module_init(fcoe_init);2500 2501/**2502 * fcoe_exit() - Clean up fcoe.ko2503 *2504 * Returns: 0 on success or a negative value on failure2505 */2506static void __exit fcoe_exit(void)2507{2508 struct fcoe_interface *fcoe, *tmp;2509 struct fcoe_ctlr *ctlr;2510 struct fcoe_port *port;2511 unsigned int cpu;2512 2513 mutex_lock(&fcoe_config_mutex);2514 2515 fcoe_dev_cleanup();2516 2517 /* releases the associated fcoe hosts */2518 rtnl_lock();2519 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {2520 ctlr = fcoe_to_ctlr(fcoe);2521 port = lport_priv(ctlr->lp);2522 fcoe_hostlist_del(port->lport);2523 queue_work(fcoe_wq, &port->destroy_work);2524 }2525 rtnl_unlock();2526 2527 for_each_possible_cpu(cpu)2528 fcoe_thread_cleanup_local(cpu);2529 2530 mutex_unlock(&fcoe_config_mutex);2531 2532 /*2533 * destroy_work's may be chained but destroy_workqueue()2534 * can take care of them. Just kill the fcoe_wq.2535 */2536 destroy_workqueue(fcoe_wq);2537 2538 /*2539 * Detaching from the scsi transport must happen after all2540 * destroys are done on the fcoe_wq. destroy_workqueue will2541 * enusre the fcoe_wq is flushed.2542 */2543 fcoe_if_exit();2544 2545 /* detach from fcoe transport */2546 fcoe_transport_detach(&fcoe_sw_transport);2547}2548module_exit(fcoe_exit);2549 2550/**2551 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler2552 * @seq: active sequence in the FLOGI or FDISC exchange2553 * @fp: response frame, or error encoded in a pointer (timeout)2554 * @arg: pointer to the fcoe_ctlr structure2555 *2556 * This handles MAC address management for FCoE, then passes control on to2557 * the libfc FLOGI response handler.2558 */2559static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)2560{2561 struct fcoe_ctlr *fip = arg;2562 struct fc_exch *exch = fc_seq_exch(seq);2563 struct fc_lport *lport = exch->lp;2564 u8 *mac;2565 2566 if (IS_ERR(fp))2567 goto done;2568 2569 mac = fr_cb(fp)->granted_mac;2570 /* pre-FIP */2571 if (is_zero_ether_addr(mac))2572 fcoe_ctlr_recv_flogi(fip, lport, fp);2573 else2574 fcoe_update_src_mac(lport, mac);2575done:2576 fc_lport_flogi_resp(seq, fp, lport);2577}2578 2579/**2580 * fcoe_logo_resp() - FCoE specific LOGO response handler2581 * @seq: active sequence in the LOGO exchange2582 * @fp: response frame, or error encoded in a pointer (timeout)2583 * @arg: pointer to the fcoe_ctlr structure2584 *2585 * This handles MAC address management for FCoE, then passes control on to2586 * the libfc LOGO response handler.2587 */2588static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)2589{2590 struct fc_lport *lport = arg;2591 static u8 zero_mac[ETH_ALEN] = { 0 };2592 2593 if (!IS_ERR(fp))2594 fcoe_update_src_mac(lport, zero_mac);2595 fc_lport_logo_resp(seq, fp, lport);2596}2597 2598/*2599 * fcoe_elsct_send - FCoE specific ELS handler2600 *2601 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,2602 * using FCoE specific response handlers and passing the FIP controller as2603 * the argument (the lport is still available from the exchange).2604 *2605 * Most of the work here is just handed off to the libfc routine.2606 */2607static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,2608 struct fc_frame *fp, unsigned int op,2609 void (*resp)(struct fc_seq *,2610 struct fc_frame *,2611 void *),2612 void *arg, u32 timeout)2613{2614 struct fcoe_port *port = lport_priv(lport);2615 struct fcoe_interface *fcoe = port->priv;2616 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);2617 struct fc_frame_header *fh = fc_frame_header_get(fp);2618 2619 switch (op) {2620 case ELS_FLOGI:2621 case ELS_FDISC:2622 if (lport->point_to_multipoint)2623 break;2624 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,2625 fip, timeout);2626 case ELS_LOGO:2627 /* only hook onto fabric logouts, not port logouts */2628 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)2629 break;2630 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,2631 lport, timeout);2632 }2633 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);2634}2635 2636/**2637 * fcoe_vport_create() - create an fc_host/scsi_host for a vport2638 * @vport: fc_vport object to create a new fc_host for2639 * @disabled: start the new fc_host in a disabled state by default?2640 *2641 * Returns: 0 for success2642 */2643static int fcoe_vport_create(struct fc_vport *vport, bool disabled)2644{2645 struct Scsi_Host *shost = vport_to_shost(vport);2646 struct fc_lport *n_port = shost_priv(shost);2647 struct fcoe_port *port = lport_priv(n_port);2648 struct fcoe_interface *fcoe = port->priv;2649 struct net_device *netdev = fcoe->netdev;2650 struct fc_lport *vn_port;2651 int rc;2652 char buf[32];2653 2654 rc = fcoe_validate_vport_create(vport);2655 if (rc) {2656 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));2657 printk(KERN_ERR "fcoe: Failed to create vport, "2658 "WWPN (0x%s) already exists\n",2659 buf);2660 return rc;2661 }2662 2663 mutex_lock(&fcoe_config_mutex);2664 rtnl_lock();2665 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);2666 rtnl_unlock();2667 mutex_unlock(&fcoe_config_mutex);2668 2669 if (IS_ERR(vn_port)) {2670 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",2671 netdev->name);2672 return -EIO;2673 }2674 2675 if (disabled) {2676 fc_vport_set_state(vport, FC_VPORT_DISABLED);2677 } else {2678 vn_port->boot_time = jiffies;2679 fc_fabric_login(vn_port);2680 fc_vport_setlink(vn_port);2681 }2682 return 0;2683}2684 2685/**2686 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport2687 * @vport: fc_vport object that is being destroyed2688 *2689 * Returns: 0 for success2690 */2691static int fcoe_vport_destroy(struct fc_vport *vport)2692{2693 struct Scsi_Host *shost = vport_to_shost(vport);2694 struct fc_lport *n_port = shost_priv(shost);2695 struct fc_lport *vn_port = vport->dd_data;2696 2697 mutex_lock(&n_port->lp_mutex);2698 list_del(&vn_port->list);2699 mutex_unlock(&n_port->lp_mutex);2700 2701 mutex_lock(&fcoe_config_mutex);2702 rtnl_lock();2703 fcoe_if_destroy(vn_port);2704 rtnl_unlock();2705 mutex_unlock(&fcoe_config_mutex);2706 2707 return 0;2708}2709 2710/**2711 * fcoe_vport_remove() - remove attached vports2712 * @lport: lport for which the vports should be removed2713 */2714static void fcoe_vport_remove(struct fc_lport *lport)2715{2716 struct Scsi_Host *shost;2717 struct fc_host_attrs *fc_host;2718 unsigned long flags;2719 struct fc_vport *vport;2720 struct fc_vport *next_vport;2721 2722 shost = lport->host;2723 fc_host = shost_to_fc_host(shost);2724 2725 /* Loop through all the vports and mark them for deletion */2726 spin_lock_irqsave(shost->host_lock, flags);2727 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {2728 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {2729 continue;2730 } else {2731 vport->flags |= FC_VPORT_DELETING;2732 queue_work(fc_host_work_q(shost),2733 &vport->vport_delete_work);2734 }2735 }2736 spin_unlock_irqrestore(shost->host_lock, flags);2737 2738 flush_workqueue(fc_host_work_q(shost));2739}2740 2741/**2742 * fcoe_vport_disable() - change vport state2743 * @vport: vport to bring online/offline2744 * @disable: should the vport be disabled?2745 */2746static int fcoe_vport_disable(struct fc_vport *vport, bool disable)2747{2748 struct fc_lport *lport = vport->dd_data;2749 2750 if (disable) {2751 fc_vport_set_state(vport, FC_VPORT_DISABLED);2752 fc_fabric_logoff(lport);2753 } else {2754 lport->boot_time = jiffies;2755 fc_fabric_login(lport);2756 fc_vport_setlink(lport);2757 }2758 2759 return 0;2760}2761 2762/**2763 * fcoe_set_vport_symbolic_name() - append vport string to symbolic name2764 * @vport: fc_vport with a new symbolic name string2765 *2766 * After generating a new symbolic name string, a new RSPN_ID request is2767 * sent to the name server. There is no response handler, so if it fails2768 * for some reason it will not be retried.2769 */2770static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)2771{2772 struct fc_lport *lport = vport->dd_data;2773 struct fc_frame *fp;2774 size_t len;2775 2776 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,2777 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,2778 fcoe_netdev(lport)->name, vport->symbolic_name);2779 2780 if (lport->state != LPORT_ST_READY)2781 return;2782 2783 len = strnlen(fc_host_symbolic_name(lport->host), 255);2784 fp = fc_frame_alloc(lport,2785 sizeof(struct fc_ct_hdr) +2786 sizeof(struct fc_ns_rspn) + len);2787 if (!fp)2788 return;2789 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,2790 NULL, NULL, 3 * lport->r_a_tov);2791}2792 2793static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)2794{2795 struct fcoe_ctlr_device *ctlr_dev =2796 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);2797 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);2798 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);2799 2800 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);2801}2802 2803/**2804 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.2805 * @lport: the local port2806 * @port_id: the port ID2807 * @fp: the received frame, if any, that caused the port_id to be set.2808 *2809 * This routine handles the case where we received a FLOGI and are2810 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()2811 * so it can set the non-mapped mode and gateway address.2812 *2813 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().2814 */2815static void fcoe_set_port_id(struct fc_lport *lport,2816 u32 port_id, struct fc_frame *fp)2817{2818 struct fcoe_port *port = lport_priv(lport);2819 struct fcoe_interface *fcoe = port->priv;2820 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);2821 2822 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)2823 fcoe_ctlr_recv_flogi(ctlr, lport, fp);2824}2825