| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Robert Love | 2849 | 26.69% | 24 | 12.77% |
| Christopher Leech | 2037 | 19.08% | 25 | 13.30% |
| Vasu Dev | 1764 | 16.52% | 36 | 19.15% |
| Hannes Reinecke | 686 | 6.43% | 11 | 5.85% |
| Yi Zou | 649 | 6.08% | 16 | 8.51% |
| Bhanu Prakash Gollapudi | 628 | 5.88% | 2 | 1.06% |
| Neerav Parikh | 557 | 5.22% | 8 | 4.26% |
| John Fastabend | 508 | 4.76% | 2 | 1.06% |
| Joe Eykholt | 273 | 2.56% | 11 | 5.85% |
| Sebastian Andrzej Siewior | 236 | 2.21% | 2 | 1.06% |
| Neil Horman | 131 | 1.23% | 7 | 3.72% |
| Kiran Patil | 95 | 0.89% | 3 | 1.60% |
| Bart Van Assche | 50 | 0.47% | 3 | 1.60% |
| Tejun Heo | 46 | 0.43% | 2 | 1.06% |
| zhengbin | 24 | 0.22% | 1 | 0.53% |
| Davidlohr Bueso A | 22 | 0.21% | 1 | 0.53% |
| Parav Pandit | 18 | 0.17% | 1 | 0.53% |
| Jiri Pirko | 16 | 0.15% | 4 | 2.13% |
| Christoph Hellwig | 11 | 0.10% | 4 | 2.13% |
| Steve Ma | 10 | 0.09% | 1 | 0.53% |
| Kees Cook | 10 | 0.09% | 2 | 1.06% |
| Milan P. Gandhi | 7 | 0.07% | 2 | 1.06% |
| Lee Jones | 5 | 0.05% | 2 | 1.06% |
| Wei Yongjun | 5 | 0.05% | 1 | 0.53% |
| Alexander Duyck | 5 | 0.05% | 1 | 0.53% |
| Abhijeet Joglekar | 5 | 0.05% | 1 | 0.53% |
| Ian Campbell | 3 | 0.03% | 1 | 0.53% |
| Randy Dunlap | 3 | 0.03% | 1 | 0.53% |
| MichelleJin | 3 | 0.03% | 1 | 0.53% |
| Jonathan Lemon | 3 | 0.03% | 1 | 0.53% |
| Michael Christie | 2 | 0.02% | 1 | 0.53% |
| Colin Ian King | 2 | 0.02% | 1 | 0.53% |
| Dan Carpenter | 2 | 0.02% | 1 | 0.53% |
| Joe Perches | 2 | 0.02% | 1 | 0.53% |
| Thomas Gleixner | 2 | 0.02% | 1 | 0.53% |
| Vaishali Thakkar | 1 | 0.01% | 1 | 0.53% |
| Patrick McHardy | 1 | 0.01% | 1 | 0.53% |
| Tom Herbert | 1 | 0.01% | 1 | 0.53% |
| Alexey Dobriyan | 1 | 0.01% | 1 | 0.53% |
| Yihao Han | 1 | 0.01% | 1 | 0.53% |
| Sedat Dilek | 1 | 0.01% | 1 | 0.53% |
| Total | 10675 | 188 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. * * Maintained at www.Open-FCoE.org */ #include <linux/module.h> #include <linux/spinlock.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/ethtool.h> #include <linux/if_ether.h> #include <linux/if_vlan.h> #include <linux/crc32.h> #include <linux/slab.h> #include <linux/cpu.h> #include <linux/fs.h> #include <linux/sysfs.h> #include <linux/ctype.h> #include <linux/workqueue.h> #include <net/dcbnl.h> #include <net/dcbevent.h> #include <scsi/scsi_tcq.h> #include <scsi/scsicam.h> #include <scsi/scsi_transport.h> #include <scsi/scsi_transport_fc.h> #include <net/rtnetlink.h> #include <scsi/fc/fc_encaps.h> #include <scsi/fc/fc_fip.h> #include <scsi/fc/fc_fcoe.h> #include <scsi/libfc.h> #include <scsi/fc_frame.h> #include <scsi/libfcoe.h> #include "fcoe.h" MODULE_AUTHOR("Open-FCoE.org"); MODULE_DESCRIPTION("FCoE"); MODULE_LICENSE("GPL v2"); /* Performance tuning parameters for fcoe */ static unsigned int fcoe_ddp_min = 4096; module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ "Direct Data Placement (DDP)."); unsigned int fcoe_debug_logging; module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); static unsigned int fcoe_e_d_tov = 2 * 1000; module_param_named(e_d_tov, fcoe_e_d_tov, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(e_d_tov, "E_D_TOV in ms, default 2000"); static unsigned int fcoe_r_a_tov = 2 * 2 * 1000; module_param_named(r_a_tov, fcoe_r_a_tov, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(r_a_tov, "R_A_TOV in ms, default 4000"); static DEFINE_MUTEX(fcoe_config_mutex); static struct workqueue_struct *fcoe_wq; /* fcoe host list */ /* must only by accessed under the RTNL mutex */ static LIST_HEAD(fcoe_hostlist); static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); /* Function Prototypes */ static int fcoe_reset(struct Scsi_Host *); static int fcoe_xmit(struct fc_lport *, struct fc_frame *); static int fcoe_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); static void fcoe_percpu_clean(struct fc_lport *); static int fcoe_link_ok(struct fc_lport *); static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); static int fcoe_hostlist_add(const struct fc_lport *); static void fcoe_hostlist_del(const struct fc_lport *); static int fcoe_device_notification(struct notifier_block *, ulong, void *); static void fcoe_dev_setup(void); static void fcoe_dev_cleanup(void); static struct fcoe_interface *fcoe_hostlist_lookup_port(const struct net_device *); static int fcoe_fip_recv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); static void fcoe_update_src_mac(struct fc_lport *, u8 *); static u8 *fcoe_get_src_mac(struct fc_lport *); static void fcoe_destroy_work(struct work_struct *); static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, unsigned int); static int fcoe_ddp_done(struct fc_lport *, u16); static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *, unsigned int); static int fcoe_dcb_app_notification(struct notifier_block *notifier, ulong event, void *ptr); static bool fcoe_match(struct net_device *netdev); static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode); static int fcoe_destroy(struct net_device *netdev); static int fcoe_enable(struct net_device *netdev); static int fcoe_disable(struct net_device *netdev); /* fcoe_syfs control interface handlers */ static int fcoe_ctlr_alloc(struct net_device *netdev); static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev); static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev); static struct fc_seq *fcoe_elsct_send(struct fc_lport *, u32 did, struct fc_frame *, unsigned int op, void (*resp)(struct fc_seq *, struct fc_frame *, void *), void *, u32 timeout); static void fcoe_recv_frame(struct sk_buff *skb); /* notification function for packets from net device */ static struct notifier_block fcoe_notifier = { .notifier_call = fcoe_device_notification, }; /* notification function for DCB events */ static struct notifier_block dcb_notifier = { .notifier_call = fcoe_dcb_app_notification, }; static struct scsi_transport_template *fcoe_nport_scsi_transport; static struct scsi_transport_template *fcoe_vport_scsi_transport; static int fcoe_vport_destroy(struct fc_vport *); static int fcoe_vport_create(struct fc_vport *, bool disabled); static int fcoe_vport_disable(struct fc_vport *, bool disable); static void fcoe_set_vport_symbolic_name(struct fc_vport *); static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *); static void fcoe_vport_remove(struct fc_lport *); static struct fcoe_sysfs_function_template fcoe_sysfs_templ = { .set_fcoe_ctlr_mode = fcoe_ctlr_mode, .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled, .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb, .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb, .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb, .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb, .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb, .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb, .get_fcoe_fcf_selected = fcoe_fcf_get_selected, .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id, }; static struct libfc_function_template fcoe_libfc_fcn_templ = { .frame_send = fcoe_xmit, .ddp_setup = fcoe_ddp_setup, .ddp_done = fcoe_ddp_done, .ddp_target = fcoe_ddp_target, .elsct_send = fcoe_elsct_send, .get_lesb = fcoe_get_lesb, .lport_set_port_id = fcoe_set_port_id, }; static struct fc_function_template fcoe_nport_fc_functions = { .show_host_node_name = 1, .show_host_port_name = 1, .show_host_supported_classes = 1, .show_host_supported_fc4s = 1, .show_host_active_fc4s = 1, .show_host_maxframe_size = 1, .show_host_serial_number = 1, .show_host_manufacturer = 1, .show_host_model = 1, .show_host_model_description = 1, .show_host_hardware_version = 1, .show_host_driver_version = 1, .show_host_firmware_version = 1, .show_host_optionrom_version = 1, .show_host_port_id = 1, .show_host_supported_speeds = 1, .get_host_speed = fc_get_host_speed, .show_host_speed = 1, .show_host_port_type = 1, .get_host_port_state = fc_get_host_port_state, .show_host_port_state = 1, .show_host_symbolic_name = 1, .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), .show_rport_maxframe_size = 1, .show_rport_supported_classes = 1, .show_host_fabric_name = 1, .show_starget_node_name = 1, .show_starget_port_name = 1, .show_starget_port_id = 1, .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, .show_rport_dev_loss_tmo = 1, .get_fc_host_stats = fc_get_host_stats, .issue_fc_host_lip = fcoe_reset, .terminate_rport_io = fc_rport_terminate_io, .vport_create = fcoe_vport_create, .vport_delete = fcoe_vport_destroy, .vport_disable = fcoe_vport_disable, .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, .bsg_request = fc_lport_bsg_request, }; static struct fc_function_template fcoe_vport_fc_functions = { .show_host_node_name = 1, .show_host_port_name = 1, .show_host_supported_classes = 1, .show_host_supported_fc4s = 1, .show_host_active_fc4s = 1, .show_host_maxframe_size = 1, .show_host_serial_number = 1, .show_host_manufacturer = 1, .show_host_model = 1, .show_host_model_description = 1, .show_host_hardware_version = 1, .show_host_driver_version = 1, .show_host_firmware_version = 1, .show_host_optionrom_version = 1, .show_host_port_id = 1, .show_host_supported_speeds = 1, .get_host_speed = fc_get_host_speed, .show_host_speed = 1, .show_host_port_type = 1, .get_host_port_state = fc_get_host_port_state, .show_host_port_state = 1, .show_host_symbolic_name = 1, .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), .show_rport_maxframe_size = 1, .show_rport_supported_classes = 1, .show_host_fabric_name = 1, .show_starget_node_name = 1, .show_starget_port_name = 1, .show_starget_port_id = 1, .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, .show_rport_dev_loss_tmo = 1, .get_fc_host_stats = fc_get_host_stats, .issue_fc_host_lip = fcoe_reset, .terminate_rport_io = fc_rport_terminate_io, .bsg_request = fc_lport_bsg_request, }; static struct scsi_host_template fcoe_shost_template = { .module = THIS_MODULE, .name = "FCoE Driver", .proc_name = FCOE_NAME, .queuecommand = fc_queuecommand, .eh_timed_out = fc_eh_timed_out, .eh_abort_handler = fc_eh_abort, .eh_device_reset_handler = fc_eh_device_reset, .eh_host_reset_handler = fc_eh_host_reset, .slave_alloc = fc_slave_alloc, .change_queue_depth = scsi_change_queue_depth, .this_id = -1, .cmd_per_lun = 3, .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, .sg_tablesize = SG_ALL, .max_sectors = 0xffff, .track_queue_depth = 1, .cmd_size = sizeof(struct libfc_cmd_priv), }; /** * fcoe_interface_setup() - Setup a FCoE interface * @fcoe: The new FCoE interface * @netdev: The net device that the fcoe interface is on * * Returns : 0 for success * Locking: must be called with the RTNL mutex held */ static int fcoe_interface_setup(struct fcoe_interface *fcoe, struct net_device *netdev) { struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); struct netdev_hw_addr *ha; struct net_device *real_dev; static const u8 flogi_maddr[ETH_ALEN] = FC_FCOE_FLOGI_MAC; const struct net_device_ops *ops; fcoe->netdev = netdev; /* Let LLD initialize for FCoE */ ops = netdev->netdev_ops; if (ops->ndo_fcoe_enable) { if (ops->ndo_fcoe_enable(netdev)) FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" " specific feature for LLD.\n"); } /* Do not support for bonding device */ if (netif_is_bond_master(netdev)) { FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); return -EOPNOTSUPP; } /* look for SAN MAC address, if multiple SAN MACs exist, only * use the first one for SPMA */ real_dev = is_vlan_dev(netdev) ? vlan_dev_real_dev(netdev) : netdev; fcoe->realdev = real_dev; rcu_read_lock(); for_each_dev_addr(real_dev, ha) { if ((ha->type == NETDEV_HW_ADDR_T_SAN) && (is_valid_ether_addr(ha->addr))) { memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); fip->spma = 1; break; } } rcu_read_unlock(); /* setup Source Mac Address */ if (!fip->spma) memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); /* * Add FCoE MAC address as second unicast MAC address * or enter promiscuous mode if not capable of listening * for multiple unicast MACs. */ dev_uc_add(netdev, flogi_maddr); if (fip->spma) dev_uc_add(netdev, fip->ctl_src_addr); if (fip->mode == FIP_MODE_VN2VN) { dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); dev_mc_add(netdev, FIP_ALL_P2P_MACS); } else dev_mc_add(netdev, FIP_ALL_ENODE_MACS); /* * setup the receive function from ethernet driver * on the ethertype for the given device */ fcoe->fcoe_packet_type.func = fcoe_rcv; fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE); fcoe->fcoe_packet_type.dev = netdev; dev_add_pack(&fcoe->fcoe_packet_type); fcoe->fip_packet_type.func = fcoe_fip_recv; fcoe->fip_packet_type.type = htons(ETH_P_FIP); fcoe->fip_packet_type.dev = netdev; dev_add_pack(&fcoe->fip_packet_type); if (netdev != real_dev) { fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv; fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP); fcoe->fip_vlan_packet_type.dev = real_dev; dev_add_pack(&fcoe->fip_vlan_packet_type); } return 0; } /** * fcoe_interface_create() - Create a FCoE interface on a net device * @netdev: The net device to create the FCoE interface on * @fip_mode: The mode to use for FIP * * Returns: pointer to a struct fcoe_interface or NULL on error */ static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, enum fip_mode fip_mode) { struct fcoe_ctlr_device *ctlr_dev; struct fcoe_ctlr *ctlr; struct fcoe_interface *fcoe; int size; int err; if (!try_module_get(THIS_MODULE)) { FCOE_NETDEV_DBG(netdev, "Could not get a reference to the module\n"); fcoe = ERR_PTR(-EBUSY); goto out; } size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface); ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ, size); if (!ctlr_dev) { FCOE_DBG("Failed to add fcoe_ctlr_device\n"); fcoe = ERR_PTR(-ENOMEM); goto out_putmod; } ctlr = fcoe_ctlr_device_priv(ctlr_dev); ctlr->cdev = ctlr_dev; fcoe = fcoe_ctlr_priv(ctlr); dev_hold(netdev); /* * Initialize FIP. */ fcoe_ctlr_init(ctlr, fip_mode); ctlr->send = fcoe_fip_send; ctlr->update_mac = fcoe_update_src_mac; ctlr->get_src_addr = fcoe_get_src_mac; err = fcoe_interface_setup(fcoe, netdev); if (err) { fcoe_ctlr_destroy(ctlr); fcoe_ctlr_device_delete(ctlr_dev); dev_put(netdev); fcoe = ERR_PTR(err); goto out_putmod; } goto out; out_putmod: module_put(THIS_MODULE); out: return fcoe; } /** * fcoe_interface_remove() - remove FCoE interface from netdev * @fcoe: The FCoE interface to be cleaned up * * Caller must be holding the RTNL mutex */ static void fcoe_interface_remove(struct fcoe_interface *fcoe) { struct net_device *netdev = fcoe->netdev; struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); static const u8 flogi_maddr[ETH_ALEN] = FC_FCOE_FLOGI_MAC; const struct net_device_ops *ops; /* * Don't listen for Ethernet packets anymore. * synchronize_net() ensures that the packet handlers are not running * on another CPU. dev_remove_pack() would do that, this calls the * unsyncronized version __dev_remove_pack() to avoid multiple delays. */ __dev_remove_pack(&fcoe->fcoe_packet_type); __dev_remove_pack(&fcoe->fip_packet_type); if (netdev != fcoe->realdev) __dev_remove_pack(&fcoe->fip_vlan_packet_type); synchronize_net(); /* Delete secondary MAC addresses */ dev_uc_del(netdev, flogi_maddr); if (fip->spma) dev_uc_del(netdev, fip->ctl_src_addr); if (fip->mode == FIP_MODE_VN2VN) { dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); dev_mc_del(netdev, FIP_ALL_P2P_MACS); } else dev_mc_del(netdev, FIP_ALL_ENODE_MACS); /* Tell the LLD we are done w/ FCoE */ ops = netdev->netdev_ops; if (ops->ndo_fcoe_disable) { if (ops->ndo_fcoe_disable(netdev)) FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" " specific feature for LLD.\n"); } fcoe->removed = 1; } /** * fcoe_interface_cleanup() - Clean up a FCoE interface * @fcoe: The FCoE interface to be cleaned up */ static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) { struct net_device *netdev = fcoe->netdev; struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); /* Release the self-reference taken during fcoe_interface_create() */ /* tear-down the FCoE controller */ fcoe_ctlr_destroy(fip); scsi_host_put(fip->lp->host); dev_put(netdev); module_put(THIS_MODULE); } /** * fcoe_fip_recv() - Handler for received FIP frames * @skb: The receive skb * @netdev: The associated net device * @ptype: The packet_type structure which was used to register this handler * @orig_dev: The original net_device the skb was received on. * (in case dev is a bond) * * Returns: 0 for success */ static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, struct packet_type *ptype, struct net_device *orig_dev) { struct fcoe_interface *fcoe; struct fcoe_ctlr *ctlr; fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); ctlr = fcoe_to_ctlr(fcoe); fcoe_ctlr_recv(ctlr, skb); return 0; } /** * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames * @skb: The receive skb * @netdev: The associated net device * @ptype: The packet_type structure which was used to register this handler * @orig_dev: The original net_device the skb was received on. * (in case dev is a bond) * * Returns: 0 for success */ static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev, struct packet_type *ptype, struct net_device *orig_dev) { struct fcoe_interface *fcoe; struct fcoe_ctlr *ctlr; fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type); ctlr = fcoe_to_ctlr(fcoe); fcoe_ctlr_recv(ctlr, skb); return 0; } /** * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame * @port: The FCoE port * @skb: The FIP/FCoE packet to be sent */ static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb) { if (port->fcoe_pending_queue.qlen) fcoe_check_wait_queue(port->lport, skb); else if (fcoe_start_io(skb)) fcoe_check_wait_queue(port->lport, skb); } /** * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame * @fip: The FCoE controller * @skb: The FIP packet to be sent */ static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) { struct fcoe_interface *fcoe = fcoe_from_ctlr(fip); struct fip_frame { struct ethhdr eth; struct fip_header fip; } __packed *frame; /* * Use default VLAN for FIP VLAN discovery protocol */ frame = (struct fip_frame *)skb->data; if (ntohs(frame->eth.h_proto) == ETH_P_FIP && ntohs(frame->fip.fip_op) == FIP_OP_VLAN && fcoe->realdev != fcoe->netdev) skb->dev = fcoe->realdev; else skb->dev = fcoe->netdev; fcoe_port_send(lport_priv(fip->lp), skb); } /** * fcoe_update_src_mac() - Update the Ethernet MAC filters * @lport: The local port to update the source MAC on * @addr: Unicast MAC address to add * * Remove any previously-set unicast MAC filter. * Add secondary FCoE MAC address filter for our OUI. */ static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) { struct fcoe_port *port = lport_priv(lport); struct fcoe_interface *fcoe = port->priv; if (!is_zero_ether_addr(port->data_src_addr)) dev_uc_del(fcoe->netdev, port->data_src_addr); if (!is_zero_ether_addr(addr)) dev_uc_add(fcoe->netdev, addr); memcpy(port->data_src_addr, addr, ETH_ALEN); } /** * fcoe_get_src_mac() - return the Ethernet source address for an lport * @lport: libfc lport */ static u8 *fcoe_get_src_mac(struct fc_lport *lport) { struct fcoe_port *port = lport_priv(lport); return port->data_src_addr; } /** * fcoe_lport_config() - Set up a local port * @lport: The local port to be setup * * Returns: 0 for success */ static int fcoe_lport_config(struct fc_lport *lport) { lport->link_up = 0; lport->qfull = 0; lport->max_retry_count = 3; lport->max_rport_retry_count = 3; lport->e_d_tov = fcoe_e_d_tov; lport->r_a_tov = fcoe_r_a_tov; lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); lport->does_npiv = 1; fc_lport_init_stats(lport); /* lport fc_lport related configuration */ fc_lport_config(lport); /* offload related configuration */ lport->crc_offload = 0; lport->seq_offload = 0; lport->lro_enabled = 0; lport->lro_xid = 0; lport->lso_max = 0; return 0; } /* * fcoe_netdev_features_change - Updates the lport's offload flags based * on the LLD netdev's FCoE feature flags */ static void fcoe_netdev_features_change(struct fc_lport *lport, struct net_device *netdev) { mutex_lock(&lport->lp_mutex); if (netdev->features & NETIF_F_SG) lport->sg_supp = 1; else lport->sg_supp = 0; if (netdev->features & NETIF_F_FCOE_CRC) { lport->crc_offload = 1; FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); } else { lport->crc_offload = 0; } if (netdev->features & NETIF_F_FSO) { lport->seq_offload = 1; lport->lso_max = min(netdev->gso_max_size, GSO_LEGACY_MAX_SIZE); FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", lport->lso_max); } else { lport->seq_offload = 0; lport->lso_max = 0; } if (netdev->fcoe_ddp_xid) { lport->lro_enabled = 1; lport->lro_xid = netdev->fcoe_ddp_xid; FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", lport->lro_xid); } else { lport->lro_enabled = 0; lport->lro_xid = 0; } mutex_unlock(&lport->lp_mutex); } /** * fcoe_netdev_config() - Set up net devive for SW FCoE * @lport: The local port that is associated with the net device * @netdev: The associated net device * * Must be called after fcoe_lport_config() as it will use local port mutex * * Returns: 0 for success */ static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) { u32 mfs; u64 wwnn, wwpn; struct fcoe_interface *fcoe; struct fcoe_ctlr *ctlr; struct fcoe_port *port; /* Setup lport private data to point to fcoe softc */ port = lport_priv(lport); fcoe = port->priv; ctlr = fcoe_to_ctlr(fcoe); /* Figure out the VLAN ID, if any */ if (is_vlan_dev(netdev)) lport->vlan = vlan_dev_vlan_id(netdev); else lport->vlan = 0; /* * Determine max frame size based on underlying device and optional * user-configured limit. If the MFS is too low, fcoe_link_ok() * will return 0, so do this first. */ mfs = netdev->mtu; if (netdev->features & NETIF_F_FCOE_MTU) { mfs = FCOE_MTU; FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); } mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); if (fc_set_mfs(lport, mfs)) return -EINVAL; /* offload features support */ fcoe_netdev_features_change(lport, netdev); skb_queue_head_init(&port->fcoe_pending_queue); port->fcoe_pending_queue_active = 0; timer_setup(&port->timer, fcoe_queue_timer, 0); fcoe_link_speed_update(lport); if (!lport->vport) { if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0); fc_set_wwnn(lport, wwnn); if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 2, 0); fc_set_wwpn(lport, wwpn); } return 0; } /** * fcoe_shost_config() - Set up the SCSI host associated with a local port * @lport: The local port * @dev: The device associated with the SCSI host * * Must be called after fcoe_lport_config() and fcoe_netdev_config() * * Returns: 0 for success */ static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) { int rc = 0; /* lport scsi host config */ lport->host->max_lun = FCOE_MAX_LUN; lport->host->max_id = FCOE_MAX_FCP_TARGET; lport->host->max_channel = 0; lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; if (lport->vport) lport->host->transportt = fcoe_vport_scsi_transport; else lport->host->transportt = fcoe_nport_scsi_transport; /* add the new host to the SCSI-ml */ rc = scsi_add_host(lport->host, dev); if (rc) { FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " "error on scsi_add_host\n"); return rc; } if (!lport->vport) fc_host_max_npiv_vports(lport->host) = USHRT_MAX; snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, "%s v%s over %s", FCOE_NAME, FCOE_VERSION, fcoe_netdev(lport)->name); return 0; } /** * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE * @lport: The local port that is associated with the net device * @netdev: The associated net device * * Must be called after fcoe_shost_config() as it will use local port mutex * */ static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev) { struct fcoe_interface *fcoe; struct fcoe_port *port; struct net_device *realdev; int rc; port = lport_priv(lport); fcoe = port->priv; realdev = fcoe->realdev; /* No FDMI state m/c for NPIV ports */ if (lport->vport) return; if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) { struct netdev_fcoe_hbainfo *fdmi; fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL); if (!fdmi) return; rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev, fdmi); if (rc) { printk(KERN_INFO "fcoe: Failed to retrieve FDMI " "information from netdev.\n"); return; } snprintf(fc_host_serial_number(lport->host), FC_SERIAL_NUMBER_SIZE, "%s", fdmi->serial_number); snprintf(fc_host_manufacturer(lport->host), FC_SERIAL_NUMBER_SIZE, "%s", fdmi->manufacturer); snprintf(fc_host_model(lport->host), FC_SYMBOLIC_NAME_SIZE, "%s", fdmi->model); snprintf(fc_host_model_description(lport->host), FC_SYMBOLIC_NAME_SIZE, "%s", fdmi->model_description); snprintf(fc_host_hardware_version(lport->host), FC_VERSION_STRING_SIZE, "%s", fdmi->hardware_version); snprintf(fc_host_driver_version(lport->host), FC_VERSION_STRING_SIZE, "%s", fdmi->driver_version); snprintf(fc_host_optionrom_version(lport->host), FC_VERSION_STRING_SIZE, "%s", fdmi->optionrom_version); snprintf(fc_host_firmware_version(lport->host), FC_VERSION_STRING_SIZE, "%s", fdmi->firmware_version); /* Enable FDMI lport states */ lport->fdmi_enabled = 1; kfree(fdmi); } else { lport->fdmi_enabled = 0; printk(KERN_INFO "fcoe: No FDMI support.\n"); } } /** * fcoe_oem_match() - The match routine for the offloaded exchange manager * @fp: The I/O frame * * This routine will be associated with an exchange manager (EM). When * the libfc exchange handling code is looking for an EM to use it will * call this routine and pass it the frame that it wishes to send. This * routine will return True if the associated EM is to be used and False * if the echange code should continue looking for an EM. * * The offload EM that this routine is associated with will handle any * packets that are for SCSI read requests. * * This has been enhanced to work when FCoE stack is operating in target * mode. * * Returns: True for read types I/O, otherwise returns false. */ static bool fcoe_oem_match(struct fc_frame *fp) { struct fc_frame_header *fh = fc_frame_header_get(fp); struct fcp_cmnd *fcp; if (fc_fcp_is_read(fr_fsp(fp)) && (fr_fsp(fp)->data_len > fcoe_ddp_min)) return true; else if ((fr_fsp(fp) == NULL) && (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) && (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) { fcp = fc_frame_payload_get(fp, sizeof(*fcp)); if ((fcp->fc_flags & FCP_CFL_WRDATA) && (ntohl(fcp->fc_dl) > fcoe_ddp_min)) return true; } return false; } /** * fcoe_em_config() - Allocate and configure an exchange manager * @lport: The local port that the new EM will be associated with * * Returns: 0 on success */ static inline int fcoe_em_config(struct fc_lport *lport) { struct fcoe_port *port = lport_priv(lport); struct fcoe_interface *fcoe = port->priv; struct fcoe_interface *oldfcoe = NULL; struct net_device *old_real_dev, *cur_real_dev; u16 min_xid = FCOE_MIN_XID; u16 max_xid = FCOE_MAX_XID; /* * Check if need to allocate an em instance for * offload exchange ids to be shared across all VN_PORTs/lport. */ if (!lport->lro_enabled || !lport->lro_xid || (lport->lro_xid >= max_xid)) { lport->lro_xid = 0; goto skip_oem; } /* * Reuse existing offload em instance in case * it is already allocated on real eth device */ if (is_vlan_dev(fcoe->netdev)) cur_real_dev = vlan_dev_real_dev(fcoe->netdev); else cur_real_dev = fcoe->netdev; list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { if (is_vlan_dev(oldfcoe->netdev)) old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); else old_real_dev = oldfcoe->netdev; if (cur_real_dev == old_real_dev) { fcoe->oem = oldfcoe->oem; break; } } if (fcoe->oem) { if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { printk(KERN_ERR "fcoe_em_config: failed to add " "offload em:%p on interface:%s\n", fcoe->oem, fcoe->netdev->name); return -ENOMEM; } } else { fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, FCOE_MIN_XID, lport->lro_xid, fcoe_oem_match); if (!fcoe->oem) { printk(KERN_ERR "fcoe_em_config: failed to allocate " "em for offload exches on interface:%s\n", fcoe->netdev->name); return -ENOMEM; } } /* * Exclude offload EM xid range from next EM xid range. */ min_xid += lport->lro_xid + 1; skip_oem: if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { printk(KERN_ERR "fcoe_em_config: failed to " "allocate em on interface %s\n", fcoe->netdev->name); return -ENOMEM; } return 0; } /** * fcoe_if_destroy() - Tear down a SW FCoE instance * @lport: The local port to be destroyed * * Locking: Must be called with the RTNL mutex held. * */ static void fcoe_if_destroy(struct fc_lport *lport) { struct fcoe_port *port = lport_priv(lport); struct fcoe_interface *fcoe = port->priv; struct net_device *netdev = fcoe->netdev; FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); /* Logout of the fabric */ fc_fabric_logoff(lport); /* Cleanup the fc_lport */ fc_lport_destroy(lport); /* Stop the transmit retry timer */ del_timer_sync(&port->timer); /* Free existing transmit skbs */ fcoe_clean_pending_queue(lport); if (!is_zero_ether_addr(port->data_src_addr)) dev_uc_del(netdev, port->data_src_addr); if (lport->vport) synchronize_net(); else fcoe_interface_remove(fcoe); /* Free queued packets for the per-CPU receive threads */ fcoe_percpu_clean(lport); /* Detach from the scsi-ml */ fc_remove_host(lport->host); scsi_remove_host(lport->host); /* Destroy lport scsi_priv */ fc_fcp_destroy(lport); /* There are no more rports or I/O, free the EM */ fc_exch_mgr_free(lport); /* Free memory used by statistical counters */ fc_lport_free_stats(lport); /* * Release the Scsi_Host for vport but hold on to * master lport until it fcoe interface fully cleaned-up. */ if (lport->vport) scsi_host_put(lport->host); } /** * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device * @lport: The local port to setup DDP for * @xid: The exchange ID for this DDP transfer * @sgl: The scatterlist describing this transfer * @sgc: The number of sg items * * Returns: 0 if the DDP context was not configured */ static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, struct scatterlist *sgl, unsigned int sgc) { struct net_device *netdev = fcoe_netdev(lport); if (netdev->netdev_ops->ndo_fcoe_ddp_setup) return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, xid, sgl, sgc); return 0; } /** * fcoe_ddp_target() - Call a LLD's ddp_target through the net device * @lport: The local port to setup DDP for * @xid: The exchange ID for this DDP transfer * @sgl: The scatterlist describing this transfer * @sgc: The number of sg items * * Returns: 0 if the DDP context was not configured */ static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, struct scatterlist *sgl, unsigned int sgc) { struct net_device *netdev = fcoe_netdev(lport); if (netdev->netdev_ops->ndo_fcoe_ddp_target) return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, sgl, sgc); return 0; } /** * fcoe_ddp_done() - Call a LLD's ddp_done through the net device * @lport: The local port to complete DDP on * @xid: The exchange ID for this DDP transfer * * Returns: the length of data that have been completed by DDP */ static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) { struct net_device *netdev = fcoe_netdev(lport); if (netdev->netdev_ops->ndo_fcoe_ddp_done) return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); return 0; } /** * fcoe_if_create() - Create a FCoE instance on an interface * @fcoe: The FCoE interface to create a local port on * @parent: The device pointer to be the parent in sysfs for the SCSI host * @npiv: Indicates if the port is a vport or not * * Creates a fc_lport instance and a Scsi_Host instance and configure them. * * Returns: The allocated fc_lport or an error pointer */ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, struct device *parent, int npiv) { struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); struct net_device *netdev = fcoe->netdev; struct fc_lport *lport, *n_port; struct fcoe_port *port; struct Scsi_Host *shost; int rc; /* * parent is only a vport if npiv is 1, * but we'll only use vport in that case so go ahead and set it */ struct fc_vport *vport = dev_to_vport(parent); FCOE_NETDEV_DBG(netdev, "Create Interface\n"); if (!npiv) lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); else lport = libfc_vport_create(vport, sizeof(*port)); if (!lport) { FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); rc = -ENOMEM; goto out; } port = lport_priv(lport); port->lport = lport; port->priv = fcoe; port->get_netdev = fcoe_netdev; port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; INIT_WORK(&port->destroy_work, fcoe_destroy_work); /* * Need to add the lport to the hostlist * so we catch NETDEV_CHANGE events. */ fcoe_hostlist_add(lport); /* configure a fc_lport including the exchange manager */ rc = fcoe_lport_config(lport); if (rc) { FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " "interface\n"); goto out_host_put; } if (npiv) { FCOE_NETDEV_DBG(netdev, "Setting vport names, " "%16.16llx %16.16llx\n", vport->node_name, vport->port_name); fc_set_wwnn(lport, vport->node_name); fc_set_wwpn(lport, vport->port_name); } /* configure lport network properties */ rc = fcoe_netdev_config(lport, netdev); if (rc) { FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " "interface\n"); goto out_lp_destroy; } /* configure lport scsi host properties */ rc = fcoe_shost_config(lport, parent); if (rc) { FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " "interface\n"); goto out_lp_destroy; } /* Initialize the library */ rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1); if (rc) { FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " "interface\n"); goto out_lp_destroy; } /* Initialized FDMI information */ fcoe_fdmi_info(lport, netdev); /* * fcoe_em_alloc() and fcoe_hostlist_add() both * need to be atomic with respect to other changes to the * hostlist since fcoe_em_alloc() looks for an existing EM * instance on host list updated by fcoe_hostlist_add(). * * This is currently handled through the fcoe_config_mutex * begin held. */ if (!npiv) /* lport exch manager allocation */ rc = fcoe_em_config(lport); else { shost = vport_to_shost(vport); n_port = shost_priv(shost); rc = fc_exch_mgr_list_clone(n_port, lport); } if (rc) { FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); goto out_lp_destroy; } return lport; out_lp_destroy: fc_exch_mgr_free(lport); out_host_put: fcoe_hostlist_del(lport); scsi_host_put(lport->host); out: return ERR_PTR(rc); } /** * fcoe_if_init() - Initialization routine for fcoe.ko * * Attaches the SW FCoE transport to the FC transport * * Returns: 0 on success */ static int __init fcoe_if_init(void) { /* attach to scsi transport */ fcoe_nport_scsi_transport = fc_attach_transport(&fcoe_nport_fc_functions); if (!fcoe_nport_scsi_transport) goto err; fcoe_vport_scsi_transport = fc_attach_transport(&fcoe_vport_fc_functions); if (!fcoe_vport_scsi_transport) goto err_vport; return 0; err_vport: fc_release_transport(fcoe_nport_scsi_transport); err: printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); return -ENODEV; } /** * fcoe_if_exit() - Tear down fcoe.ko * * Detaches the SW FCoE transport from the FC transport * * Returns: 0 on success */ static int __exit fcoe_if_exit(void) { fc_release_transport(fcoe_nport_scsi_transport); fc_release_transport(fcoe_vport_scsi_transport); fcoe_nport_scsi_transport = NULL; fcoe_vport_scsi_transport = NULL; return 0; } static void fcoe_thread_cleanup_local(unsigned int cpu) { struct page *crc_eof; struct fcoe_percpu_s *p; p = per_cpu_ptr(&fcoe_percpu, cpu); spin_lock_bh(&p->fcoe_rx_list.lock); crc_eof = p->crc_eof_page; p->crc_eof_page = NULL; p->crc_eof_offset = 0; spin_unlock_bh(&p->fcoe_rx_list.lock); if (crc_eof) put_page(crc_eof); flush_work(&p->work); } /** * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming * command. * * This routine selects next CPU based on cpumask to distribute * incoming requests in round robin. * * Returns: int CPU number */ static inline unsigned int fcoe_select_cpu(void) { static unsigned int selected_cpu; selected_cpu = cpumask_next(selected_cpu, cpu_online_mask); if (selected_cpu >= nr_cpu_ids) selected_cpu = cpumask_first(cpu_online_mask); return selected_cpu; } /** * fcoe_rcv() - Receive packets from a net device * @skb: The received packet * @netdev: The net device that the packet was received on * @ptype: The packet type context * @olddev: The last device net device * * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a * FC frame and passes the frame to libfc. * * Returns: 0 for success */ static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, struct packet_type *ptype, struct net_device *olddev) { struct fc_lport *lport; struct fcoe_rcv_info *fr; struct fcoe_ctlr *ctlr; struct fcoe_interface *fcoe; struct fc_frame_header *fh; struct fcoe_percpu_s *fps; struct ethhdr *eh; unsigned int cpu; fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); ctlr = fcoe_to_ctlr(fcoe); lport = ctlr->lp; if (unlikely(!lport)) { FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n"); goto err2; } if (!lport->link_up) goto err2; FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", skb->len, skb->data_len, skb->head, skb->data, skb_tail_pointer(skb), skb_end_pointer(skb), skb->csum, skb->dev ? skb->dev->name : "<NULL>"); skb = skb_share_check(skb, GFP_ATOMIC); if (skb == NULL) return NET_RX_DROP; eh = eth_hdr(skb); if (is_fip_mode(ctlr) && !ether_addr_equal(eh->h_source, ctlr->dest_addr)) { FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", eh->h_source); goto err; } /* * Check for minimum frame length, and make sure required FCoE * and FC headers are pulled into the linear data area. */ if (unlikely((skb->len < FCOE_MIN_FRAME) || !pskb_may_pull(skb, FCOE_HEADER_LEN))) goto err; skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); fh = (struct fc_frame_header *) skb_transport_header(skb); if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", eh->h_dest); goto err; } fr = fcoe_dev_from_skb(skb); fr->fr_dev = lport; /* * In case the incoming frame's exchange is originated from * the initiator, then received frame's exchange id is ANDed * with fc_cpu_mask bits to get the same cpu on which exchange * was originated, otherwise select cpu using rx exchange id * or fcoe_select_cpu(). */ if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; else { if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN) cpu = fcoe_select_cpu(); else cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; } if (cpu >= nr_cpu_ids) goto err; fps = &per_cpu(fcoe_percpu, cpu); spin_lock(&fps->fcoe_rx_list.lock); /* * We now have a valid CPU that we're targeting for * this skb. We also have this receive thread locked, * so we're free to queue skbs into it's queue. */ /* * Note: We used to have a set of conditions under which we would * call fcoe_recv_frame directly, rather than queuing to the rx list * as it could save a few cycles, but doing so is prohibited, as * fcoe_recv_frame has several paths that may sleep, which is forbidden * in softirq context. */ __skb_queue_tail(&fps->fcoe_rx_list, skb); schedule_work_on(cpu, &fps->work); spin_unlock(&fps->fcoe_rx_list.lock); return NET_RX_SUCCESS; err: this_cpu_inc(lport->stats->ErrorFrames); err2: kfree_skb(skb); return NET_RX_DROP; } /** * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC * @skb: The packet to be transmitted * @tlen: The total length of the trailer * * Returns: 0 for success */ static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) { struct fcoe_percpu_s *fps; int rc; local_lock(&fcoe_percpu.lock); fps = this_cpu_ptr(&fcoe_percpu); rc = fcoe_get_paged_crc_eof(skb, tlen, fps); local_unlock(&fcoe_percpu.lock); return rc; } /** * fcoe_xmit() - Transmit a FCoE frame * @lport: The local port that the frame is to be transmitted for * @fp: The frame to be transmitted * * Return: 0 for success */ static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) { int wlen; u32 crc; struct ethhdr *eh; struct fcoe_crc_eof *cp; struct sk_buff *skb; struct fc_frame_header *fh; unsigned int hlen; /* header length implies the version */ unsigned int tlen; /* trailer length */ unsigned int elen; /* eth header, may include vlan */ struct fcoe_port *port = lport_priv(lport); struct fcoe_interface *fcoe = port->priv; struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); u8 sof, eof; struct fcoe_hdr *hp; WARN_ON((fr_len(fp) % sizeof(u32)) != 0); fh = fc_frame_header_get(fp); skb = fp_skb(fp); if (!lport->link_up) { kfree_skb(skb); return 0; } if (unlikely(fh->fh_type == FC_TYPE_ELS) && fcoe_ctlr_els_send(ctlr, lport, skb)) return 0; sof = fr_sof(fp); eof = fr_eof(fp); elen = sizeof(struct ethhdr); hlen = sizeof(struct fcoe_hdr); tlen = sizeof(struct fcoe_crc_eof); wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; /* crc offload */ if (likely(lport->crc_offload)) { skb->ip_summed = CHECKSUM_PARTIAL; skb->csum_start = skb_headroom(skb); skb->csum_offset = skb->len; crc = 0; } else { skb->ip_summed = CHECKSUM_NONE; crc = fcoe_fc_crc(fp); } /* copy port crc and eof to the skb buff */ if (skb_is_nonlinear(skb)) { skb_frag_t *frag; if (fcoe_alloc_paged_crc_eof(skb, tlen)) { kfree_skb(skb); return -ENOMEM; } frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; cp = kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag); } else { cp = skb_put(skb, tlen); } memset(cp, 0, sizeof(*cp)); cp->fcoe_eof = eof; cp->fcoe_crc32 = cpu_to_le32(~crc); if (skb_is_nonlinear(skb)) { kunmap_atomic(cp); cp = NULL; } /* adjust skb network/transport offsets to match mac/fcoe/port */ skb_push(skb, elen + hlen); skb_reset_mac_header(skb); skb_reset_network_header(skb); skb->mac_len = elen; skb->protocol = htons(ETH_P_FCOE); skb->priority = fcoe->priority; if (is_vlan_dev(fcoe->netdev) && fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) { /* must set skb->dev before calling vlan_put_tag */ skb->dev = fcoe->realdev; __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_dev_vlan_id(fcoe->netdev)); } else skb->dev = fcoe->netdev; /* fill up mac and fcoe headers */ eh = eth_hdr(skb); eh->h_proto = htons(ETH_P_FCOE); memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN); if (ctlr->map_dest) memcpy(eh->h_dest + 3, fh->fh_d_id, 3); if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN)) memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN); else memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); hp = (struct fcoe_hdr *)(eh + 1); memset(hp, 0, sizeof(*hp)); if (FC_FCOE_VER) FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); hp->fcoe_sof = sof; /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ if (lport->seq_offload && fr_max_payload(fp)) { skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; skb_shinfo(skb)->gso_size = fr_max_payload(fp); } else { skb_shinfo(skb)->gso_type = 0; skb_shinfo(skb)->gso_size = 0; } /* update tx stats: regardless if LLD fails */ this_cpu_inc(lport->stats->TxFrames); this_cpu_add(lport->stats->TxWords, wlen); /* send down to lld */ fr_dev(fp) = lport; fcoe_port_send(port, skb); return 0; } /** * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC * @lport: The local port the frame was received on * @fp: The received frame * * Return: 0 on passing filtering checks */ static inline int fcoe_filter_frames(struct fc_lport *lport, struct fc_frame *fp) { struct fcoe_ctlr *ctlr; struct fcoe_interface *fcoe; struct fc_frame_header *fh; struct sk_buff *skb = (struct sk_buff *)fp; /* * We only check CRC if no offload is available and if it is * it's solicited data, in which case, the FCP layer would * check it during the copy. */ if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; else fr_flags(fp) |= FCPHF_CRC_UNCHECKED; fh = fc_frame_header_get(fp); if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) return 0; fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; ctlr = fcoe_to_ctlr(fcoe); if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); return -EINVAL; } if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; return 0; } if (this_cpu_inc_return(lport->stats->InvalidCRCCount) < 5) printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); return -EINVAL; } /** * fcoe_recv_frame() - process a single received frame * @skb: frame to process */ static void fcoe_recv_frame(struct sk_buff *skb) { u32 fr_len; struct fc_lport *lport; struct fcoe_rcv_info *fr; struct fcoe_crc_eof crc_eof; struct fc_frame *fp; struct fcoe_hdr *hp; fr = fcoe_dev_from_skb(skb); lport = fr->fr_dev; if (unlikely(!lport)) { FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n"); kfree_skb(skb); return; } FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", skb->len, skb->data_len, skb->head, skb->data, skb_tail_pointer(skb), skb_end_pointer(skb), skb->csum, skb->dev ? skb->dev->name : "<NULL>"); skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ /* * Frame length checks and setting up the header pointers * was done in fcoe_rcv already. */ hp = (struct fcoe_hdr *) skb_network_header(skb); if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { struct fc_stats *stats; stats = per_cpu_ptr(lport->stats, raw_smp_processor_id()); if (READ_ONCE(stats->ErrorFrames) < 5) printk(KERN_WARNING "fcoe: FCoE version " "mismatch: The frame has " "version %x, but the " "initiator supports version " "%x\n", FC_FCOE_DECAPS_VER(hp), FC_FCOE_VER); goto drop; } skb_pull(skb, sizeof(struct fcoe_hdr)); fr_len = skb->len - sizeof(struct fcoe_crc_eof); this_cpu_inc(lport->stats->RxFrames); this_cpu_add(lport->stats->RxWords, fr_len / FCOE_WORD_TO_BYTE); fp = (struct fc_frame *)skb; fc_frame_init(fp); fr_dev(fp) = lport; fr_sof(fp) = hp->fcoe_sof; /* Copy out the CRC and EOF trailer for access */ if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) goto drop; fr_eof(fp) = crc_eof.fcoe_eof; fr_crc(fp) = crc_eof.fcoe_crc32; if (pskb_trim(skb, fr_len)) goto drop; if (!fcoe_filter_frames(lport, fp)) { fc_exch_recv(lport, fp); return; } drop: this_cpu_inc(lport->stats->ErrorFrames); kfree_skb(skb); } /** * fcoe_receive_work() - The per-CPU worker * @work: The work struct * */ static void fcoe_receive_work(struct work_struct *work) { struct fcoe_percpu_s *p; struct sk_buff *skb; struct sk_buff_head tmp; p = container_of(work, struct fcoe_percpu_s, work); skb_queue_head_init(&tmp); spin_lock_bh(&p->fcoe_rx_list.lock); skb_queue_splice_init(&p->fcoe_rx_list, &tmp); spin_unlock_bh(&p->fcoe_rx_list.lock); if (!skb_queue_len(&tmp)) return; while ((skb = __skb_dequeue(&tmp))) fcoe_recv_frame(skb); } /** * fcoe_dev_setup() - Setup the link change notification interface */ static void fcoe_dev_setup(void) { register_dcbevent_notifier(&dcb_notifier); register_netdevice_notifier(&fcoe_notifier); } /** * fcoe_dev_cleanup() - Cleanup the link change notification interface */ static void fcoe_dev_cleanup(void) { unregister_dcbevent_notifier(&dcb_notifier); unregister_netdevice_notifier(&fcoe_notifier); } static struct fcoe_interface * fcoe_hostlist_lookup_realdev_port(struct net_device *netdev) { struct fcoe_interface *fcoe; struct net_device *real_dev; list_for_each_entry(fcoe, &fcoe_hostlist, list) { if (is_vlan_dev(fcoe->netdev)) real_dev = vlan_dev_real_dev(fcoe->netdev); else real_dev = fcoe->netdev; if (netdev == real_dev) return fcoe; } return NULL; } static int fcoe_dcb_app_notification(struct notifier_block *notifier, ulong event, void *ptr) { struct dcb_app_type *entry = ptr; struct fcoe_ctlr *ctlr; struct fcoe_interface *fcoe; struct net_device *netdev; int prio; if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE) return NOTIFY_OK; netdev = dev_get_by_index(&init_net, entry->ifindex); if (!netdev) return NOTIFY_OK; fcoe = fcoe_hostlist_lookup_realdev_port(netdev); dev_put(netdev); if (!fcoe) return NOTIFY_OK; ctlr = fcoe_to_ctlr(fcoe); if (entry->dcbx & DCB_CAP_DCBX_VER_CEE) prio = ffs(entry->app.priority) - 1; else prio = entry->app.priority; if (prio < 0) return NOTIFY_OK; if (entry->app.protocol == ETH_P_FIP || entry->app.protocol == ETH_P_FCOE) ctlr->priority = prio; if (entry->app.protocol == ETH_P_FCOE) fcoe->priority = prio; return NOTIFY_OK; } /** * fcoe_device_notification() - Handler for net device events * @notifier: The context of the notification * @event: The type of event * @ptr: The net device that the event was on * * This function is called by the Ethernet driver in case of link change event. * * Returns: 0 for success */ static int fcoe_device_notification(struct notifier_block *notifier, ulong event, void *ptr) { struct fcoe_ctlr_device *cdev; struct fc_lport *lport = NULL; struct net_device *netdev = netdev_notifier_info_to_dev(ptr); struct fcoe_ctlr *ctlr; struct fcoe_interface *fcoe; u32 link_possible = 1; u32 mfs; int rc = NOTIFY_OK; list_for_each_entry(fcoe, &fcoe_hostlist, list) { if (fcoe->netdev == netdev) { ctlr = fcoe_to_ctlr(fcoe); lport = ctlr->lp; break; } } if (!lport) { rc = NOTIFY_DONE; goto out; } switch (event) { case NETDEV_DOWN: case NETDEV_GOING_DOWN: link_possible = 0; break; case NETDEV_UP: case NETDEV_CHANGE: break; case NETDEV_CHANGEMTU: if (netdev->features & NETIF_F_FCOE_MTU) break; mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); if (mfs >= FC_MIN_MAX_FRAME) fc_set_mfs(lport, mfs); break; case NETDEV_REGISTER: break; case NETDEV_UNREGISTER: list_del(&fcoe->list); fcoe_vport_remove(lport); mutex_lock(&fcoe_config_mutex); fcoe_if_destroy(lport); if (!fcoe->removed) fcoe_interface_remove(fcoe); fcoe_interface_cleanup(fcoe); mutex_unlock(&fcoe_config_mutex); fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr)); goto out; case NETDEV_FEAT_CHANGE: fcoe_netdev_features_change(lport, netdev); break; default: FCOE_NETDEV_DBG(netdev, "Unknown event %ld " "from netdev netlink\n", event); } fcoe_link_speed_update(lport); cdev = fcoe_ctlr_to_ctlr_dev(ctlr); if (link_possible && !fcoe_link_ok(lport)) { switch (cdev->enabled) { case FCOE_CTLR_DISABLED: pr_info("Link up while interface is disabled.\n"); break; case FCOE_CTLR_ENABLED: case FCOE_CTLR_UNUSED: fcoe_ctlr_link_up(ctlr); } } else if (fcoe_ctlr_link_down(ctlr)) { switch (cdev->enabled) { case FCOE_CTLR_DISABLED: pr_info("Link down while interface is disabled.\n"); break; case FCOE_CTLR_ENABLED: case FCOE_CTLR_UNUSED: this_cpu_inc(lport->stats->LinkFailureCount); fcoe_clean_pending_queue(lport); } } out: return rc; } /** * fcoe_disable() - Disables a FCoE interface * @netdev : The net_device object the Ethernet interface to create on * * Called from fcoe transport. * * Returns: 0 for success * * Deprecated: use fcoe_ctlr_enabled() */ static int fcoe_disable(struct net_device *netdev) { struct fcoe_ctlr *ctlr; struct fcoe_interface *fcoe; int rc = 0; mutex_lock(&fcoe_config_mutex); rtnl_lock(); fcoe = fcoe_hostlist_lookup_port(netdev); rtnl_unlock(); if (fcoe) { ctlr = fcoe_to_ctlr(fcoe); fcoe_ctlr_link_down(ctlr); fcoe_clean_pending_queue(ctlr->lp); } else rc = -ENODEV; mutex_unlock(&fcoe_config_mutex); return rc; } /** * fcoe_enable() - Enables a FCoE interface * @netdev : The net_device object the Ethernet interface to create on * * Called from fcoe transport. * * Returns: 0 for success */ static int fcoe_enable(struct net_device *netdev) { struct fcoe_ctlr *ctlr; struct fcoe_interface *fcoe; int rc = 0; mutex_lock(&fcoe_config_mutex); rtnl_lock(); fcoe = fcoe_hostlist_lookup_port(netdev); rtnl_unlock(); if (!fcoe) { rc = -ENODEV; goto out; } ctlr = fcoe_to_ctlr(fcoe); if (!fcoe_link_ok(ctlr->lp)) fcoe_ctlr_link_up(ctlr); out: mutex_unlock(&fcoe_config_mutex); return rc; } /** * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller * @cdev: The FCoE Controller that is being enabled or disabled * * fcoe_sysfs will ensure that the state of 'enabled' has * changed, so no checking is necessary here. This routine simply * calls fcoe_enable or fcoe_disable, both of which are deprecated. * When those routines are removed the functionality can be merged * here. */ static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev) { struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev); struct fc_lport *lport = ctlr->lp; struct net_device *netdev = fcoe_netdev(lport); switch (cdev->enabled) { case FCOE_CTLR_ENABLED: return fcoe_enable(netdev); case FCOE_CTLR_DISABLED: return fcoe_disable(netdev); case FCOE_CTLR_UNUSED: default: return -ENOTSUPP; } } /** * fcoe_ctlr_mode() - Switch FIP mode * @ctlr_dev: The FCoE Controller that is being modified * * When the FIP mode has been changed we need to update * the multicast addresses to ensure we get the correct * frames. */ static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev) { struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN && ctlr->mode != FIP_MODE_VN2VN) { dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS); dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS); dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS); } else if (ctlr->mode != FIP_MODE_FABRIC) { dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS); dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS); dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS); } fcoe_ctlr_set_fip_mode(ctlr_dev); } /** * fcoe_destroy() - Destroy a FCoE interface * @netdev : The net_device object the Ethernet interface to create on * * Called from fcoe transport * * Returns: 0 for success */ static int fcoe_destroy(struct net_device *netdev) { struct fcoe_ctlr *ctlr; struct fcoe_interface *fcoe; struct fc_lport *lport; struct fcoe_port *port; int rc = 0; mutex_lock(&fcoe_config_mutex); rtnl_lock(); fcoe = fcoe_hostlist_lookup_port(netdev); if (!fcoe) { rc = -ENODEV; goto out_nodev; } ctlr = fcoe_to_ctlr(fcoe); lport = ctlr->lp; port = lport_priv(lport); list_del(&fcoe->list); queue_work(fcoe_wq, &port->destroy_work); out_nodev: rtnl_unlock(); mutex_unlock(&fcoe_config_mutex); return rc; } /** * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context * @work: Handle to the FCoE port to be destroyed */ static void fcoe_destroy_work(struct work_struct *work) { struct fcoe_ctlr_device *cdev; struct fcoe_ctlr *ctlr; struct fcoe_port *port; struct fcoe_interface *fcoe; port = container_of(work, struct fcoe_port, destroy_work); fcoe_vport_remove(port->lport); mutex_lock(&fcoe_config_mutex); fcoe = port->priv; ctlr = fcoe_to_ctlr(fcoe); cdev = fcoe_ctlr_to_ctlr_dev(ctlr); rtnl_lock(); fcoe_if_destroy(port->lport); if (!fcoe->removed) fcoe_interface_remove(fcoe); rtnl_unlock(); fcoe_interface_cleanup(fcoe); mutex_unlock(&fcoe_config_mutex); fcoe_ctlr_device_delete(cdev); } /** * fcoe_match() - Check if the FCoE is supported on the given netdevice * @netdev : The net_device object the Ethernet interface to create on * * Called from fcoe transport. * * Returns: always returns true as this is the default FCoE transport, * i.e., support all netdevs. */ static bool fcoe_match(struct net_device *netdev) { return true; } /** * fcoe_dcb_create() - Initialize DCB attributes and hooks * @fcoe: The new FCoE interface */ static void fcoe_dcb_create(struct fcoe_interface *fcoe) { int ctlr_prio = TC_PRIO_BESTEFFORT; int fcoe_prio = TC_PRIO_INTERACTIVE; struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); #ifdef CONFIG_DCB int dcbx; u8 fup, up; struct net_device *netdev = fcoe->realdev; struct dcb_app app = { .priority = 0, .protocol = ETH_P_FCOE }; /* setup DCB priority attributes. */ if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) { dcbx = netdev->dcbnl_ops->getdcbx(netdev); if (dcbx & DCB_CAP_DCBX_VER_IEEE) { app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; up = dcb_ieee_getapp_mask(netdev, &app); app.protocol = ETH_P_FIP; fup = dcb_ieee_getapp_mask(netdev, &app); } else { app.selector = DCB_APP_IDTYPE_ETHTYPE; up = dcb_getapp(netdev, &app); app.protocol = ETH_P_FIP; fup = dcb_getapp(netdev, &app); } fcoe_prio = ffs(up) ? ffs(up) - 1 : 0; ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio; } #endif fcoe->priority = fcoe_prio; ctlr->priority = ctlr_prio; } enum fcoe_create_link_state { FCOE_CREATE_LINK_DOWN, FCOE_CREATE_LINK_UP, }; /** * _fcoe_create() - (internal) Create a fcoe interface * @netdev : The net_device object the Ethernet interface to create on * @fip_mode: The FIP mode for this creation * @link_state: The ctlr link state on creation * * Called from either the libfcoe 'create' module parameter * via fcoe_create or from fcoe_syfs's ctlr_create file. * * libfcoe's 'create' module parameter is deprecated so some * consolidation of code can be done when that interface is * removed. */ static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode, enum fcoe_create_link_state link_state) { int rc = 0; struct fcoe_ctlr_device *ctlr_dev; struct fcoe_ctlr *ctlr; struct fcoe_interface *fcoe; struct fc_lport *lport; mutex_lock(&fcoe_config_mutex); rtnl_lock(); /* look for existing lport */ if (fcoe_hostlist_lookup(netdev)) { rc = -EEXIST; goto out_nodev; } fcoe = fcoe_interface_create(netdev, fip_mode); if (IS_ERR(fcoe)) { rc = PTR_ERR(fcoe); goto out_nodev; } ctlr = fcoe_to_ctlr(fcoe); ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr); lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0); if (IS_ERR(lport)) { printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", netdev->name); rc = -EIO; if (!fcoe->removed) fcoe_interface_remove(fcoe); rtnl_unlock(); fcoe_interface_cleanup(fcoe); mutex_unlock(&fcoe_config_mutex); fcoe_ctlr_device_delete(ctlr_dev); return rc; } /* Make this the "master" N_Port */ ctlr->lp = lport; /* setup DCB priority attributes. */ fcoe_dcb_create(fcoe); /* start FIP Discovery and FLOGI */ lport->boot_time = jiffies; fc_fabric_login(lport); /* * If the fcoe_ctlr_device is to be set to DISABLED * it must be done after the lport is added to the * hostlist, but before the rtnl_lock is released. * This is because the rtnl_lock protects the * hostlist that fcoe_device_notification uses. If * the FCoE Controller is intended to be created * DISABLED then 'enabled' needs to be considered * handling link events. 'enabled' must be set * before the lport can be found in the hostlist * when a link up event is received. */ if (link_state == FCOE_CREATE_LINK_UP) ctlr_dev->enabled = FCOE_CTLR_ENABLED; else ctlr_dev->enabled = FCOE_CTLR_DISABLED; if (link_state == FCOE_CREATE_LINK_UP && !fcoe_link_ok(lport)) { rtnl_unlock(); fcoe_ctlr_link_up(ctlr); mutex_unlock(&fcoe_config_mutex); return rc; } out_nodev: rtnl_unlock(); mutex_unlock(&fcoe_config_mutex); return rc; } /** * fcoe_create() - Create a fcoe interface * @netdev : The net_device object the Ethernet interface to create on * @fip_mode: The FIP mode for this creation * * Called from fcoe transport * * Returns: 0 for success */ static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode) { return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP); } /** * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs * @netdev: The net_device to be used by the allocated FCoE Controller * * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr * in a link_down state. The allows the user an opportunity to configure * the FCoE Controller from sysfs before enabling the FCoE Controller. * * Creating in with this routine starts the FCoE Controller in Fabric * mode. The user can change to VN2VN or another mode before enabling. */ static int fcoe_ctlr_alloc(struct net_device *netdev) { return _fcoe_create(netdev, FIP_MODE_FABRIC, FCOE_CREATE_LINK_DOWN); } /** * fcoe_link_ok() - Check if the link is OK for a local port * @lport: The local port to check link on * * Returns: 0 if link is UP and OK, -1 if not * */ static int fcoe_link_ok(struct fc_lport *lport) { struct net_device *netdev = fcoe_netdev(lport); if (netif_oper_up(netdev)) return 0; return -1; } /** * fcoe_percpu_clean() - Clear all pending skbs for an local port * @lport: The local port whose skbs are to be cleared * * Must be called with fcoe_create_mutex held to single-thread completion. * * This flushes the pending skbs by flush the work item for each CPU. The work * item on each possible CPU is flushed because we may have used the per-CPU * struct of an offline CPU. */ static void fcoe_percpu_clean(struct fc_lport *lport) { struct fcoe_percpu_s *pp; unsigned int cpu; for_each_possible_cpu(cpu) { pp = &per_cpu(fcoe_percpu, cpu); flush_work(&pp->work); } } /** * fcoe_reset() - Reset a local port * @shost: The SCSI host associated with the local port to be reset * * Returns: Always 0 (return value required by FC transport template) */ static int fcoe_reset(struct Scsi_Host *shost) { struct fc_lport *lport = shost_priv(shost); struct fcoe_port *port = lport_priv(lport); struct fcoe_interface *fcoe = port->priv; struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr); fcoe_ctlr_link_down(ctlr); fcoe_clean_pending_queue(ctlr->lp); if (cdev->enabled != FCOE_CTLR_DISABLED && !fcoe_link_ok(ctlr->lp)) fcoe_ctlr_link_up(ctlr); return 0; } /** * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device * @netdev: The net device used as a key * * Locking: Must be called with the RNL mutex held. * * Returns: NULL or the FCoE interface */ static struct fcoe_interface * fcoe_hostlist_lookup_port(const struct net_device *netdev) { struct fcoe_interface *fcoe; list_for_each_entry(fcoe, &fcoe_hostlist, list) { if (fcoe->netdev == netdev) return fcoe; } return NULL; } /** * fcoe_hostlist_lookup() - Find the local port associated with a * given net device * @netdev: The netdevice used as a key * * Locking: Must be called with the RTNL mutex held * * Returns: NULL or the local port */ static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) { struct fcoe_ctlr *ctlr; struct fcoe_interface *fcoe; fcoe = fcoe_hostlist_lookup_port(netdev); ctlr = fcoe_to_ctlr(fcoe); return (fcoe) ? ctlr->lp : NULL; } /** * fcoe_hostlist_add() - Add the FCoE interface identified by a local * port to the hostlist * @lport: The local port that identifies the FCoE interface to be added * * Locking: must be called with the RTNL mutex held * * Returns: 0 for success */ static int fcoe_hostlist_add(const struct fc_lport *lport) { struct fcoe_interface *fcoe; struct fcoe_port *port; fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); if (!fcoe) { port = lport_priv(lport); fcoe = port->priv; list_add_tail(&fcoe->list, &fcoe_hostlist); } return 0; } /** * fcoe_hostlist_del() - Remove the FCoE interface identified by a local * port to the hostlist * @lport: The local port that identifies the FCoE interface to be added * * Locking: must be called with the RTNL mutex held * */ static void fcoe_hostlist_del(const struct fc_lport *lport) { struct fcoe_interface *fcoe; struct fcoe_port *port; port = lport_priv(lport); fcoe = port->priv; list_del(&fcoe->list); return; } static struct fcoe_transport fcoe_sw_transport = { .name = {FCOE_TRANSPORT_DEFAULT}, .attached = false, .list = LIST_HEAD_INIT(fcoe_sw_transport.list), .match = fcoe_match, .alloc = fcoe_ctlr_alloc, .create = fcoe_create, .destroy = fcoe_destroy, .enable = fcoe_enable, .disable = fcoe_disable, }; /** * fcoe_init() - Initialize fcoe.ko * * Returns: 0 on success, or a negative value on failure */ static int __init fcoe_init(void) { struct fcoe_percpu_s *p; unsigned int cpu; int rc = 0; fcoe_wq = alloc_workqueue("fcoe", 0, 0); if (!fcoe_wq) return -ENOMEM; /* register as a fcoe transport */ rc = fcoe_transport_attach(&fcoe_sw_transport); if (rc) { printk(KERN_ERR "failed to register an fcoe transport, check " "if libfcoe is loaded\n"); goto out_destroy; } mutex_lock(&fcoe_config_mutex); for_each_possible_cpu(cpu) { p = per_cpu_ptr(&fcoe_percpu, cpu); INIT_WORK(&p->work, fcoe_receive_work); skb_queue_head_init(&p->fcoe_rx_list); local_lock_init(&p->lock); } /* Setup link change notification */ fcoe_dev_setup(); rc = fcoe_if_init(); if (rc) goto out_free; mutex_unlock(&fcoe_config_mutex); return 0; out_free: mutex_unlock(&fcoe_config_mutex); out_destroy: destroy_workqueue(fcoe_wq); return rc; } module_init(fcoe_init); /** * fcoe_exit() - Clean up fcoe.ko * * Returns: 0 on success or a negative value on failure */ static void __exit fcoe_exit(void) { struct fcoe_interface *fcoe, *tmp; struct fcoe_ctlr *ctlr; struct fcoe_port *port; unsigned int cpu; mutex_lock(&fcoe_config_mutex); fcoe_dev_cleanup(); /* releases the associated fcoe hosts */ rtnl_lock(); list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { ctlr = fcoe_to_ctlr(fcoe); port = lport_priv(ctlr->lp); fcoe_hostlist_del(port->lport); queue_work(fcoe_wq, &port->destroy_work); } rtnl_unlock(); for_each_possible_cpu(cpu) fcoe_thread_cleanup_local(cpu); mutex_unlock(&fcoe_config_mutex); /* * destroy_work's may be chained but destroy_workqueue() * can take care of them. Just kill the fcoe_wq. */ destroy_workqueue(fcoe_wq); /* * Detaching from the scsi transport must happen after all * destroys are done on the fcoe_wq. destroy_workqueue will * enusre the fcoe_wq is flushed. */ fcoe_if_exit(); /* detach from fcoe transport */ fcoe_transport_detach(&fcoe_sw_transport); } module_exit(fcoe_exit); /** * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler * @seq: active sequence in the FLOGI or FDISC exchange * @fp: response frame, or error encoded in a pointer (timeout) * @arg: pointer to the fcoe_ctlr structure * * This handles MAC address management for FCoE, then passes control on to * the libfc FLOGI response handler. */ static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) { struct fcoe_ctlr *fip = arg; struct fc_exch *exch = fc_seq_exch(seq); struct fc_lport *lport = exch->lp; u8 *mac; if (IS_ERR(fp)) goto done; mac = fr_cb(fp)->granted_mac; /* pre-FIP */ if (is_zero_ether_addr(mac)) fcoe_ctlr_recv_flogi(fip, lport, fp); else fcoe_update_src_mac(lport, mac); done: fc_lport_flogi_resp(seq, fp, lport); } /** * fcoe_logo_resp() - FCoE specific LOGO response handler * @seq: active sequence in the LOGO exchange * @fp: response frame, or error encoded in a pointer (timeout) * @arg: pointer to the fcoe_ctlr structure * * This handles MAC address management for FCoE, then passes control on to * the libfc LOGO response handler. */ static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) { struct fc_lport *lport = arg; static u8 zero_mac[ETH_ALEN] = { 0 }; if (!IS_ERR(fp)) fcoe_update_src_mac(lport, zero_mac); fc_lport_logo_resp(seq, fp, lport); } /* * fcoe_elsct_send - FCoE specific ELS handler * * This does special case handling of FIP encapsualted ELS exchanges for FCoE, * using FCoE specific response handlers and passing the FIP controller as * the argument (the lport is still available from the exchange). * * Most of the work here is just handed off to the libfc routine. */ static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, struct fc_frame *fp, unsigned int op, void (*resp)(struct fc_seq *, struct fc_frame *, void *), void *arg, u32 timeout) { struct fcoe_port *port = lport_priv(lport); struct fcoe_interface *fcoe = port->priv; struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); struct fc_frame_header *fh = fc_frame_header_get(fp); switch (op) { case ELS_FLOGI: case ELS_FDISC: if (lport->point_to_multipoint) break; return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, fip, timeout); case ELS_LOGO: /* only hook onto fabric logouts, not port logouts */ if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) break; return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, lport, timeout); } return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); } /** * fcoe_vport_create() - create an fc_host/scsi_host for a vport * @vport: fc_vport object to create a new fc_host for * @disabled: start the new fc_host in a disabled state by default? * * Returns: 0 for success */ static int fcoe_vport_create(struct fc_vport *vport, bool disabled) { struct Scsi_Host *shost = vport_to_shost(vport); struct fc_lport *n_port = shost_priv(shost); struct fcoe_port *port = lport_priv(n_port); struct fcoe_interface *fcoe = port->priv; struct net_device *netdev = fcoe->netdev; struct fc_lport *vn_port; int rc; char buf[32]; rc = fcoe_validate_vport_create(vport); if (rc) { fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf)); printk(KERN_ERR "fcoe: Failed to create vport, " "WWPN (0x%s) already exists\n", buf); return rc; } mutex_lock(&fcoe_config_mutex); rtnl_lock(); vn_port = fcoe_if_create(fcoe, &vport->dev, 1); rtnl_unlock(); mutex_unlock(&fcoe_config_mutex); if (IS_ERR(vn_port)) { printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", netdev->name); return -EIO; } if (disabled) { fc_vport_set_state(vport, FC_VPORT_DISABLED); } else { vn_port->boot_time = jiffies; fc_fabric_login(vn_port); fc_vport_setlink(vn_port); } return 0; } /** * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport * @vport: fc_vport object that is being destroyed * * Returns: 0 for success */ static int fcoe_vport_destroy(struct fc_vport *vport) { struct Scsi_Host *shost = vport_to_shost(vport); struct fc_lport *n_port = shost_priv(shost); struct fc_lport *vn_port = vport->dd_data; mutex_lock(&n_port->lp_mutex); list_del(&vn_port->list); mutex_unlock(&n_port->lp_mutex); mutex_lock(&fcoe_config_mutex); rtnl_lock(); fcoe_if_destroy(vn_port); rtnl_unlock(); mutex_unlock(&fcoe_config_mutex); return 0; } /** * fcoe_vport_remove() - remove attached vports * @lport: lport for which the vports should be removed */ static void fcoe_vport_remove(struct fc_lport *lport) { struct Scsi_Host *shost; struct fc_host_attrs *fc_host; unsigned long flags; struct fc_vport *vport; struct fc_vport *next_vport; shost = lport->host; fc_host = shost_to_fc_host(shost); /* Loop through all the vports and mark them for deletion */ spin_lock_irqsave(shost->host_lock, flags); list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { continue; } else { vport->flags |= FC_VPORT_DELETING; queue_work(fc_host_work_q(shost), &vport->vport_delete_work); } } spin_unlock_irqrestore(shost->host_lock, flags); flush_workqueue(fc_host_work_q(shost)); } /** * fcoe_vport_disable() - change vport state * @vport: vport to bring online/offline * @disable: should the vport be disabled? */ static int fcoe_vport_disable(struct fc_vport *vport, bool disable) { struct fc_lport *lport = vport->dd_data; if (disable) { fc_vport_set_state(vport, FC_VPORT_DISABLED); fc_fabric_logoff(lport); } else { lport->boot_time = jiffies; fc_fabric_login(lport); fc_vport_setlink(lport); } return 0; } /** * fcoe_set_vport_symbolic_name() - append vport string to symbolic name * @vport: fc_vport with a new symbolic name string * * After generating a new symbolic name string, a new RSPN_ID request is * sent to the name server. There is no response handler, so if it fails * for some reason it will not be retried. */ static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) { struct fc_lport *lport = vport->dd_data; struct fc_frame *fp; size_t len; snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, fcoe_netdev(lport)->name, vport->symbolic_name); if (lport->state != LPORT_ST_READY) return; len = strnlen(fc_host_symbolic_name(lport->host), 255); fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + sizeof(struct fc_ns_rspn) + len); if (!fp) return; lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, NULL, NULL, 3 * lport->r_a_tov); } static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev) { struct fcoe_ctlr_device *ctlr_dev = fcoe_fcf_dev_to_ctlr_dev(fcf_dev); struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev); } /** * fcoe_set_port_id() - Callback from libfc when Port_ID is set. * @lport: the local port * @port_id: the port ID * @fp: the received frame, if any, that caused the port_id to be set. * * This routine handles the case where we received a FLOGI and are * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() * so it can set the non-mapped mode and gateway address. * * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). */ static void fcoe_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp) { struct fcoe_port *port = lport_priv(lport); struct fcoe_interface *fcoe = port->priv; struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) fcoe_ctlr_recv_flogi(ctlr, lport, fp); }
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