/* * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. * Copyright (c) 2009 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. * * Maintained at www.Open-FCoE.org */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if !defined(__VMKLNX__) #include #endif /* !defined(__VMKLNX__) */ #include #include #include #include #include #include #include #include #if defined(__VMKLNX__) #include "fcoe.h" #include #endif /* defined(__VMKLNX__) */ MODULE_AUTHOR("Open-FCoE.org"); MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs"); MODULE_LICENSE("GPLv2"); #if defined(__VMKLNX__) /* * Match the major version number with libfcoe.sc scons file */ MODULE_VERSION("1.0.24.9.4-0vmw") #endif /* defined(__VMKLNX__) */ #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */ #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */ #if defined(__VMKLNX__) /* libfcoe log level*/ #define LIBFCOE_MODULE_NAME "libfcoe" vmk_LogComponent libfcoeLog; /* module_param for turning on/off VN2VN */ static char *vn2vn_ports = "All ports are set to fabric by default. User specifices vn2vn ports"; module_param(vn2vn_ports, charp, S_IRUGO); MODULE_PARM_DESC(vn2vn_ports, "'Turn on VN2VN feature on select ports (or all)\n" " (default == 0)"); #endif /* #if defined(__VMKLNX__) */ static void fcoe_ctlr_timeout(unsigned long); static void fcoe_ctlr_timer_work(struct work_struct *); static void fcoe_ctlr_recv_work(struct work_struct *); static void fcoe_ctlr_select(struct fcoe_ctlr *fip); u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS; u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS; u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS; unsigned int libfcoe_debug_logging = 0x2; module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); #if defined(__VMKLNX__) static int fcoe_ctlr_vlan_request(struct fcoe_ctlr *fip); static int fcoe_ctlr_recv_vlan_notification(struct fcoe_ctlr *fip, struct fip_header *fh); /* * This is defined to check the compatibility of fcoe_ctlr structural changes * with previous released drivers which uses libfcoe. */ #define SAME_OFFSET(st1, st2, field) (offsetof(st1, field) == offsetof(st2, field)) VMK_ASSERT_LIST(struct_fcoe_ctlr_offset_check, VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, state)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, mode)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, lp)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, sel_fcf)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, fcfs)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, fcf_count)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, sol_time)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, sel_time)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, port_ka_time)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, ctlr_ka_time)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, timer)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, timer_work)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, recv_work)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, fip_recv_list)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, user_mfs)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, flogi_oxid)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, flogi_count)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, reset_req)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, map_dest)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, spma)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, send_ctlr_ka)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, send_port_ka)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, dest_addr)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, ctl_src_addr)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, vlan_id)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, send)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, update_mac)); VMK_ASSERT_ON_COMPILE(SAME_OFFSET(struct fcoe_ctlr, struct fcoe_ctlr_9_2_2_x, get_src_addr)); ) VMK_ASSERT_LIST(struct_fcoe_ctlr, VMK_ASSERT_ON_COMPILE(sizeof(struct fcoe_ctlr) == sizeof(struct fcoe_ctlr_9_2_2_x)); ) #endif /* defined(__VMKLNX__) */ /** * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid * @fcf: The FCF to check * * Return non-zero if FCF fcoe_size has been validated. */ static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf) { return (fcf->flags & FIP_FL_SOL) != 0; } /** * fcoe_ctlr_fcf_usable() - Check if a FCF is usable * @fcf: The FCF to check * * Return non-zero if the FCF is usable. */ static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf) { u16 flags = FIP_FL_SOL | FIP_FL_AVAIL; return (fcf->flags & flags) == flags; } /** * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses * @fip: The FCoE controller */ void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip) { u8 *ptr; if (fip->mode == FIP_MODE_VN2VN) hton24(fip->dest_addr, FIP_VN_FC_MAP); else hton24(fip->dest_addr, FIP_DEF_FC_MAP); ptr = &fip->dest_addr[3]; hton24(ptr, 0); fip->map_dest = 1; } /** * fcoe_ctlr_init() - Initialize the FCoE Controller instance * @fip: The FCoE controller to initialize */ /* _VMKLNX_CODECHECK_: fcoe_ctlr_init */ void fcoe_ctlr_init(struct fcoe_ctlr *fip) { fip->state = FIP_ST_LINK_WAIT; fip->mode = FIP_MODE_AUTO; INIT_LIST_HEAD(&fip->fcfs); INIT_LIST_HEAD(&fip->remote_vn_ports); #if defined(__VMKLNX__) fip->ctlr_lock = kmalloc(sizeof(spinlock_t), GFP_ATOMIC); spin_lock_init(fip->ctlr_lock); # else mutex_init(&fip->ctlr_mutex); #endif /* defined(__VMKLNX__) */ fip->flogi_oxid = FC_XID_UNKNOWN; setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work); INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); skb_queue_head_init(&fip->fip_recv_list); } EXPORT_SYMBOL(fcoe_ctlr_init); #if defined(__VMKLNX__) static int __init libfcoe_init(void) { VMK_ReturnStatus vmkStat; vmk_LogProperties logProps; vmkStat = vmk_NameInitialize(&logProps.name, LIBFCOE_MODULE_NAME); VMK_ASSERT(vmkStat == VMK_OK); logProps.module = vmklnx_this_module_id; logProps.heap = vmk_ModuleGetHeapID(vmklnx_this_module_id); logProps.defaultLevel = 0; logProps.throttle = NULL; vmkStat = vmk_LogRegister(&logProps, &libfcoeLog); if (vmkStat != VMK_OK) { printk(KERN_ERR "LIBFCOE vmk_LogRegister failed: %s.\n", vmk_StatusToString(vmkStat)); return 1; } vmk_LogSetCurrentLogLevel(libfcoeLog, libfcoe_debug_logging); return 0; } module_init(libfcoe_init); static void __exit libfcoe_exit(void) { vmk_LogUnregister(libfcoeLog); } module_exit(libfcoe_exit); #endif /* defined(__VMKLNX__) */ /** * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller * @fip: The FCoE controller whose FCFs are to be reset * * Called with &fcoe_ctlr lock held. */ static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) { struct fcoe_fcf *fcf; struct fcoe_fcf *next; fip->sel_fcf = NULL; list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { list_del(&fcf->list); kfree(fcf); } fip->fcf_count = 0; fip->sel_time = 0; } /** * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller * @fip: The FCoE controller to tear down * * This is called by FCoE drivers before freeing the &fcoe_ctlr. * * The receive handler will have been deleted before this to guarantee * that no more recv_work will be scheduled. * * The timer routine will simply return once we set FIP_ST_DISABLED. * This guarantees that no further timeouts or work will be scheduled. */ /* _VMKLNX_CODECHECK_: fcoe_ctlr_destroy */ void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) { cancel_work_sync(&fip->recv_work); skb_queue_purge(&fip->fip_recv_list); #if defined(__VMKLNX__) spin_lock_bh(fip->ctlr_lock); #else mutex_lock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) fip->state = FIP_ST_DISABLED; fcoe_ctlr_reset_fcfs(fip); #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); kfree(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) del_timer_sync(&fip->timer); cancel_work_sync(&fip->timer_work); } EXPORT_SYMBOL(fcoe_ctlr_destroy); /** * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port * @fip: The FCoE controller to get the maximum FCoE size from * * Returns the maximum packet size including the FCoE header and trailer, * but not including any Ethernet or VLAN headers. */ u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip) { /* * Determine the max FCoE frame size allowed, including * FCoE header and trailer. * Note: lp->mfs is currently the payload size, not the frame size. */ return fip->lp->mfs + sizeof(struct fc_frame_header) + sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof); } /** * fcoe_ctlr_solicit() - Send a FIP solicitation * @fip: The FCoE controller to send the solicitation on * @fcf: The destination FCF (if NULL, a multicast solicitation is sent) */ static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf) { struct sk_buff *skb; struct fip_sol { struct ethhdr eth; struct fip_header fip; struct { struct fip_mac_desc mac; struct fip_wwn_desc wwnn; struct fip_size_desc size; } __attribute__((packed)) desc; } __attribute__((packed)) *sol; u32 fcoe_size; if (0 == fip->vlan_id) return; skb = dev_alloc_skb(sizeof(*sol)); if (!skb) return; sol = (struct fip_sol *)skb->data; memset(sol, 0, sizeof(*sol)); memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN); memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN); sol->eth.h_proto = htons(ETH_P_FIP); sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); sol->fip.fip_op = htons(FIP_OP_DISC); sol->fip.fip_subcode = FIP_SC_SOL; sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW); sol->fip.fip_flags = htons(FIP_FL_FPMA); if (fip->spma) sol->fip.fip_flags |= htons(FIP_FL_SPMA); sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW; memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW; put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn); fcoe_size = fcoe_ctlr_fcoe_size(fip); sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW; sol->desc.size.fd_size = htons(fcoe_size); skb_put(skb, sizeof(*sol)); skb->protocol = htons(ETH_P_FIP); skb_reset_mac_header(skb); skb_reset_network_header(skb); fip->send(fip, skb); if (!fcf) fip->sol_time = jiffies; } /** * fcoe_ctlr_link_up() - Start FCoE controller * @fip: The FCoE controller to start * * Called from the LLD when the network link is ready. * * ESX Deviation Notes: * FIP VLAN discovery is only invoked for port that depends on ESX to do it. * For device that does FIP VLAN discovery in firmare or the driver, it should * set fip->vlan_id to FCOE_FIP_NO_VLAN_DISCOVERY. */ /* _VMKLNX_CODECHECK_: fcoe_ctlr_link_up */ void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) { struct net_device *netdev; char *port_ptr = NULL; u16 vlan_id; #if defined(__VMKLNX__) spin_lock_bh(fip->ctlr_lock); #else mutex_lock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) fc_linkup(fip->lp); } else if (fip->state == FIP_ST_LINK_WAIT) { #if defined(__VMKLNX__) if (fip->vlan_id != FCOE_FIP_NO_VLAN_DISCOVERY) { #endif /* defined(__VMKLNX__) */ netdev = (fip->lp)->tt.get_cna_netdev(fip->lp); VMK_ASSERT(netdev); port_ptr = strstr(vn2vn_ports, netdev->name); #if defined(__VMKLNX__) if (port_ptr || (netdev->features & NETIF_F_CNA_VN2VN)) #else if (port_ptr) #endif /* defined(__VMKLNX__) */ { fip->mode = FIP_MODE_VN2VN; printk("fcoe_ctlr_link_up: setting vn2vn mode for %s\n", netdev->name); } else { fip->mode = FIP_MODE_FABRIC; printk("fcoe_ctlr_link_up: setting fabric mode for %s\n", netdev->name); } #if defined(__VMKLNX__) } #endif /* defined(__VMKLNX__) */ fip->state = fip->mode; switch (fip->mode) { default: LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode); /* fall-through */ case FIP_MODE_AUTO: LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n"); case FIP_MODE_FABRIC: #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) fc_linkup(fip->lp); #if defined(__VMKLNX__) if (fip->vlan_id == FCOE_FIP_NO_VLAN_DISCOVERY) { fcoe_ctlr_solicit(fip, NULL); } else { struct net_device *netdev; netdev = (fip->lp)->tt.get_cna_netdev(fip->lp); VMK_ASSERT(netdev); vlan_id = vmklnx_cna_get_vlan_tag(netdev) & VLAN_VID_MASK; if (fip->vlan_id == 0 && vlan_id != 0 && vlan_id < FCOE_FIP_NO_VLAN_DISCOVERY) { fip->vlan_id = FCOE_FIP_NO_VLAN_DISCOVERY; LIBFCOE_FIP_DBG(fip, "vlan id already known(%d), " "no FIP VLAN discovery needed\n", vlan_id); fcoe_ctlr_solicit(fip, NULL); } else { fcoe_ctlr_vlan_request(fip); } } #else /* !defined(__VMKLNX__) */ fcoe_ctlr_solicit(fip, NULL); #endif /* defined(__VMKLNX__) */ break; case FIP_MODE_VN2VN: fip->lp->point_to_multipoint = 1; fip->lp->tt.disc_recv_req = fcoe_ctlr_disc_recv; fip->lp->tt.disc_start = fcoe_ctlr_disc_start; fip->lp->tt.disc_stop = fcoe_ctlr_disc_stop; fip->lp->tt.disc_stop_final = fcoe_ctlr_disc_stop_final; fip->lp->disc.priv = fip; fcoe_ctlr_vn_start(fip); #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) fc_linkup(fip->lp); /* * Current VN2VN specification does not have any info on * vlan setting, but network l2 switches needs VLAN to * send traffic across. According to the T11 clarification * "http://www.t11.org/ftp/t11/pub/fc/bb-6/12-218v2.pdf" * document user can configure static VLAN-ID or choose not * to. If there is no vlan-id set by the user just message * in the log and move on. */ netdev = (fip->lp)->tt.get_cna_netdev(fip->lp); VMK_ASSERT(netdev); vlan_id = vmklnx_cna_get_vlan_tag(netdev) & VLAN_VID_MASK; if (!vlan_id) { printk("host%d: fip: static vlan id (%d) is NOT" "set, no FIP VLAN discovery \n", (fip)->lp->host->host_no, vlan_id); } break; } } else { #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) } } EXPORT_SYMBOL(fcoe_ctlr_link_up); /** * fcoe_ctlr_reset() - Reset a FCoE controller * @fip: The FCoE controller to reset */ static void fcoe_ctlr_reset(struct fcoe_ctlr *fip) { fcoe_ctlr_reset_fcfs(fip); #if !defined(__VMKLNX__) del_timer(&fip->timer); #else /* !defined(__VMKLNX__) */ /* * Remove the timer only if FIP VLAN discovery has succeeded. */ if (fip->vlan_id != 0) { del_timer(&fip->timer); } #endif /* !defined(__VMKLNX__) */ fip->ctlr_ka_time = 0; fip->port_ka_time = 0; fip->sol_time = 0; fip->flogi_oxid = FC_XID_UNKNOWN; fip->map_dest = 0; } /** * fcoe_ctlr_link_down() - Stop a FCoE controller * @fip: The FCoE controller to be stopped * * Returns non-zero if the link was up and now isn't. * * Called from the LLD when the network link is not ready. * There may be multiple calls while the link is down. */ /* _VMKLNX_CODECHECK_: fcoe_ctlr_link_down */ int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) { int link_dropped; LIBFCOE_FIP_DBG(fip, "link down.\n"); #if defined(__VMKLNX__) spin_lock_bh(fip->ctlr_lock); #else mutex_lock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) fcoe_ctlr_reset(fip); link_dropped = fip->state != FIP_ST_LINK_WAIT; fip->state = FIP_ST_LINK_WAIT; #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) if (link_dropped) fc_linkdown(fip->lp); return link_dropped; } EXPORT_SYMBOL(fcoe_ctlr_link_down); /** * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF * @fip: The FCoE controller to send the FKA on * @lport: libfc fc_lport to send from * @ports: 0 for controller keep-alive, 1 for port keep-alive * @sa: The source MAC address * * A controller keep-alive is sent every fka_period (typically 8 seconds). * The source MAC is the native MAC address. * * A port keep-alive is sent every 90 seconds while logged in. * The source MAC is the assigned mapped source address. * The destination is the FCF's F-port. */ static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, struct fc_lport *lport, int ports, u8 *sa) { struct sk_buff *skb; struct fip_kal { struct ethhdr eth; struct fip_header fip; struct fip_mac_desc mac; } __attribute__((packed)) *kal; struct fip_vn_desc *vn; u32 len; struct fc_lport *lp; struct fcoe_fcf *fcf; fcf = fip->sel_fcf; lp = fip->lp; if (!fcf || !fc_host_port_id(lp->host)) return; len = sizeof(*kal) + ports * sizeof(*vn); skb = dev_alloc_skb(len); if (!skb) { LIBFCOE_FIP_DBG(fip, "skb alloc failed- not sending FIP KA\n"); return; } kal = (struct fip_kal *)skb->data; memset(kal, 0, len); memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); memcpy(kal->eth.h_source, sa, ETH_ALEN); kal->eth.h_proto = htons(ETH_P_FIP); kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); kal->fip.fip_op = htons(FIP_OP_CTRL); kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; kal->fip.fip_dl_len = htons((sizeof(kal->mac) + ports * sizeof(*vn)) / FIP_BPW); kal->fip.fip_flags = htons(FIP_FL_FPMA); if (fip->spma) kal->fip.fip_flags |= htons(FIP_FL_SPMA); kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); if (ports) { vn = (struct fip_vn_desc *)(kal + 1); vn->fd_desc.fip_dtype = FIP_DT_VN_ID; vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); hton24(vn->fd_fc_id, fc_host_port_id(lp->host)); put_unaligned_be64(lp->wwpn, &vn->fd_wwpn); } skb_put(skb, len); skb->protocol = htons(ETH_P_FIP); skb_reset_mac_header(skb); skb_reset_network_header(skb); fip->send(fip, skb); } /** * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it * @fip: The FCoE controller for the ELS frame * @lport: local port * @dtype: The FIP descriptor type for the frame * @skb: The FCoE ELS frame including FC header but no FCoE headers * @d_id: The destination port ID. * Returns non-zero error code on failure. * * The caller must check that the length is a multiple of 4. * * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). * Headroom includes the FIP encapsulation description, FIP header, and * Ethernet header. The tailroom is for the FIP MAC descriptor. */ static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, u8 dtype, struct sk_buff *skb, u32 d_id) { struct fip_encaps_head { struct ethhdr eth; struct fip_header fip; struct fip_encaps encaps; } __attribute__((packed)) *cap; struct fc_frame_header *fh; struct fip_mac_desc *mac; struct fcoe_fcf *fcf; size_t dlen; u16 fip_flags; u8 op; u8 *mac_ptr; fh = (struct fc_frame_header *)skb->data; op = *(u8 *)(fh + 1); dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap)); memset(cap, 0, sizeof(*cap)); if (lport->point_to_multipoint) { if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest)) return -ENODEV; fip_flags = 0; } else { fcf = fip->sel_fcf; if (!fcf) return -ENODEV; fip_flags = fcf->flags; fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : FIP_FL_FPMA; if (!fip_flags) return -ENODEV; memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); } memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); cap->eth.h_proto = htons(ETH_P_FIP); cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); cap->fip.fip_op = htons(FIP_OP_LS); if (op == ELS_LS_ACC || op == ELS_LS_RJT) cap->fip.fip_subcode = FIP_SC_REP; else cap->fip.fip_subcode = FIP_SC_REQ; cap->fip.fip_flags = htons(fip_flags); cap->encaps.fd_desc.fip_dtype = dtype; cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; if (op != ELS_LS_RJT) { dlen += sizeof(*mac); mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac)); memset(mac, 0, sizeof(*mac)); mac->fd_desc.fip_dtype = FIP_DT_MAC; mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) { memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); } else if (fip->mode == FIP_MODE_VN2VN) { hton24(mac->fd_mac, FIP_VN_FC_MAP); mac_ptr = &mac->fd_mac[3]; hton24(mac_ptr, fip->port_id); } else if (fip_flags & FIP_FL_SPMA) { LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n"); memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); } else { LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n"); /* FPMA only FLOGI. Must leave the MAC desc zeroed. */ } } cap->fip.fip_dl_len = htons(dlen / FIP_BPW); skb->protocol = htons(ETH_P_FIP); skb_reset_mac_header(skb); skb_reset_network_header(skb); return 0; } /** * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. * @fip: FCoE controller. * @lport: libfc fc_lport to send from * @skb: FCoE ELS frame including FC header but no FCoE headers. * * Returns a non-zero error code if the frame should not be sent. * Returns zero if the caller should send the frame with FCoE encapsulation. * * The caller must check that the length is a multiple of 4. * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). */ /* _VMKLNX_CODECHECK_: fcoe_ctlr_els_send */ int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, struct sk_buff *skb) { struct fc_frame *fp; struct fc_frame_header *fh; u16 old_xid; u8 op; u8 mac[ETH_ALEN]; fp = container_of(skb, struct fc_frame, skb); fh = (struct fc_frame_header *)skb->data; op = *(u8 *)(fh + 1); if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) { old_xid = fip->flogi_oxid; fip->flogi_oxid = ntohs(fh->fh_ox_id); if (fip->state == FIP_ST_AUTO) { if (old_xid == FC_XID_UNKNOWN) fip->flogi_count = 0; fip->flogi_count++; if (fip->flogi_count < 3) goto drop; fcoe_ctlr_map_dest(fip); return 0; } if (fip->state == FIP_ST_NON_FIP) fip->map_dest = 1; } if (fip->state == FIP_ST_NON_FIP) return 0; if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN) goto drop; switch (op) { case ELS_FLOGI: op = FIP_DT_FLOGI; break; case ELS_FDISC: if (ntoh24(fh->fh_s_id)) return 0; op = FIP_DT_FDISC; break; case ELS_LOGO: if (fip->mode == FIP_MODE_VN2VN) { if (fip->state != FIP_ST_VNMP_UP) return -EINVAL; if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI) return -EINVAL; } else { if (fip->state != FIP_ST_ENABLED) return 0; if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) return 0; } op = FIP_DT_LOGO; break; case ELS_LS_ACC: /* * Here we must've gotten an SID by accepting an FLOGI * If non-FIP, we may have gotten an SID by accepting an FLOGI * from a point-to-point connection. Switch to using * the source mac based on the SID. The destination * MAC in this case would have been set by receving the * FLOGI. */ if (fip->state == FIP_ST_NON_FIP) { if (fip->flogi_oxid == FC_XID_UNKNOWN) return 0; fip->flogi_oxid = FC_XID_UNKNOWN; fc_fcoe_set_mac(mac, fh->fh_d_id); fip->update_mac(lport, mac); } /* fall through */ case ELS_LS_RJT: op = fr_encaps(fp); if (op) break; return 0; default: if (fip->state != FIP_ST_ENABLED && fip->state != FIP_ST_VNMP_UP) goto drop; return 0; } LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n", op, ntoh24(fh->fh_d_id)); if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id))) goto drop; fip->send(fip, skb); return -EINPROGRESS; drop: kfree_skb(skb); return -EINVAL; } EXPORT_SYMBOL(fcoe_ctlr_els_send); /** * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller * @fip: The FCoE controller to free FCFs on * * Called with lock held and preemption disabled. * * An FCF is considered old if we have missed three advertisements. * That is, there have been no valid advertisement from it for three * times its keep-alive period including fuzz. * * In addition, determine the time when an FCF selection can occur. * * Also, increment the MissDiscAdvCount when no advertisement is received * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB). */ static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) { struct fcoe_fcf *fcf; struct fcoe_fcf *next; unsigned long sel_time = 0; unsigned long mda_time = 0; struct fcoe_dev_stats *stats; list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { mda_time = fcf->fka_period + (fcf->fka_period >> 1); if ((fip->sel_fcf == fcf) && (time_after(jiffies, fcf->time + mda_time))) { mod_timer(&fip->timer, jiffies + mda_time); #if defined(__VMKLNX__) stats = FCOE_PER_CPU_PTR(fip->lp->dev_stats, smp_processor_id(), sizeof(struct fcoe_dev_stats)); #else stats = per_cpu_ptr(fip->lp->dev_stats, smp_processor_id()); #endif stats->MissDiscAdvCount++; printk(KERN_INFO "libfcoe: host%d: Missing Discovery " "Advertisement for fab %16.16llx count %lld\n", fip->lp->host->host_no, fcf->fabric_name, stats->MissDiscAdvCount); } if (time_after_eq(jiffies, fcf->time + fcf->fka_period * 3 + msecs_to_jiffies(FIP_FCF_FUZZ * 3))) { if (fip->sel_fcf == fcf) fip->sel_fcf = NULL; list_del(&fcf->list); WARN_ON(!fip->fcf_count); fip->fcf_count--; kfree(fcf); #if defined(__VMKLNX__) stats = FCOE_PER_CPU_PTR(fip->lp->dev_stats, smp_processor_id(), sizeof(struct fcoe_dev_stats)); #else stats = per_cpu_ptr(fip->lp->dev_stats, smp_processor_id()); #endif stats->VLinkFailureCount++; } else if (fcoe_ctlr_mtu_valid(fcf) && (!sel_time || time_before(sel_time, fcf->time))) { sel_time = fcf->time; } } if (sel_time && !fip->sel_fcf && !fip->sel_time) { sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); fip->sel_time = sel_time; if (time_before(sel_time, fip->timer.expires)) mod_timer(&fip->timer, sel_time); } } /** * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry * @fip: The FCoE controller receiving the advertisement * @skb: The received FIP advertisement frame * @fcf: The resulting FCF entry * * Returns zero on a valid parsed advertisement, * otherwise returns non zero value. */ static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip, struct sk_buff *skb, struct fcoe_fcf *fcf) { struct fip_header *fiph; struct fip_desc *desc = NULL; struct fip_wwn_desc *wwn; struct fip_fab_desc *fab; struct fip_fka_desc *fka; unsigned long t; size_t rlen; size_t dlen; memset(fcf, 0, sizeof(*fcf)); fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); fiph = (struct fip_header *)skb->data; fcf->flags = ntohs(fiph->fip_flags); rlen = ntohs(fiph->fip_dl_len) * 4; if (rlen + sizeof(*fiph) > skb->len) return -EINVAL; desc = (struct fip_desc *)(fiph + 1); while (rlen > 0) { dlen = desc->fip_dlen * FIP_BPW; if (dlen < sizeof(*desc) || dlen > rlen) return -EINVAL; switch (desc->fip_dtype) { case FIP_DT_PRI: if (dlen != sizeof(struct fip_pri_desc)) goto len_err; fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; break; case FIP_DT_MAC: if (dlen != sizeof(struct fip_mac_desc)) goto len_err; memcpy(fcf->fcf_mac, ((struct fip_mac_desc *)desc)->fd_mac, ETH_ALEN); if (!is_valid_ether_addr(fcf->fcf_mac)) { LIBFCOE_FIP_DBG(fip, "Invalid MAC addr %pM in FIP adv\n", fcf->fcf_mac); return -EINVAL; } break; case FIP_DT_NAME: if (dlen != sizeof(struct fip_wwn_desc)) goto len_err; wwn = (struct fip_wwn_desc *)desc; fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); break; case FIP_DT_FAB: if (dlen != sizeof(struct fip_fab_desc)) goto len_err; fab = (struct fip_fab_desc *)desc; fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); fcf->vfid = ntohs(fab->fd_vfid); fcf->fc_map = ntoh24(fab->fd_map); break; case FIP_DT_FKA: if (dlen != sizeof(struct fip_fka_desc)) goto len_err; fka = (struct fip_fka_desc *)desc; if (fka->fd_flags & FIP_FKA_ADV_D) fcf->fd_flags = 1; t = ntohl(fka->fd_fka_period); if (t >= FCOE_CTLR_MIN_FKA) fcf->fka_period = msecs_to_jiffies(t); break; case FIP_DT_MAP_OUI: case FIP_DT_FCOE_SIZE: case FIP_DT_FLOGI: case FIP_DT_FDISC: case FIP_DT_LOGO: case FIP_DT_ELP: default: LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " "in FIP adv\n", desc->fip_dtype); /* standard says ignore unknown descriptors >= 128 */ if (desc->fip_dtype < FIP_DT_VENDOR_BASE) return -EINVAL; continue; } desc = (struct fip_desc *)((char *)desc + dlen); rlen -= dlen; } if (!fcf->fc_map || (fcf->fc_map & 0x10000)) return -EINVAL; if (!fcf->switch_name) return -EINVAL; return 0; len_err: LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", desc->fip_dtype, dlen); return -EINVAL; } /** * fcoe_ctlr_recv_adv() - Handle an incoming advertisement * @fip: The FCoE controller receiving the advertisement * @skb: The received FIP packet */ static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) { struct fcoe_fcf *fcf; struct fcoe_fcf new; unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); int first = 0; int mtu_valid; int found = 0; if (fcoe_ctlr_parse_adv(fip, skb, &new)) return; #if defined(__VMKLNX__) spin_lock_bh(fip->ctlr_lock); #else mutex_lock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) first = list_empty(&fip->fcfs); list_for_each_entry(fcf, &fip->fcfs, list) { if (fcf->switch_name == new.switch_name && fcf->fabric_name == new.fabric_name && fcf->fc_map == new.fc_map && compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) { found = 1; break; } } if (!found) { if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) goto out; fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); if (!fcf) goto out; fip->fcf_count++; memcpy(fcf, &new, sizeof(new)); list_add(&fcf->list, &fip->fcfs); } else { /* * Flags in advertisements are ignored once the FCF is * selected. Flags in unsolicited advertisements are * ignored after a usable solicited advertisement * has been received. */ fcf->fd_flags = new.fd_flags; if (!fcoe_ctlr_fcf_usable(fcf)) fcf->flags = new.flags; if (fcf == fip->sel_fcf && !fcf->fd_flags) { fip->ctlr_ka_time -= fcf->fka_period; fip->ctlr_ka_time += new.fka_period; if (time_before(fip->ctlr_ka_time, fip->timer.expires)) mod_timer(&fip->timer, fip->ctlr_ka_time); } fcf->fka_period = new.fka_period; memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); } mtu_valid = fcoe_ctlr_mtu_valid(fcf); fcf->time = jiffies; if (!found) { LIBFCOE_FIP_DBG(fip, "New FCF for fab %16.16llx " "map %x val %d mac %02x:%02x:%02x:%02x:%02x:%02x\n", fcf->fabric_name, fcf->fc_map, mtu_valid, fcf->fcf_mac[0], fcf->fcf_mac[1], fcf->fcf_mac[2], fcf->fcf_mac[3], fcf->fcf_mac[4], fcf->fcf_mac[5]); } /* * If this advertisement is not solicited and our max receive size * hasn't been verified, send a solicited advertisement. */ if (!mtu_valid) fcoe_ctlr_solicit(fip, fcf); /* * If its been a while since we did a solicit, and this is * the first advertisement we've received, do a multicast * solicitation to gather as many advertisements as we can * before selection occurs. */ if (first && time_after(jiffies, fip->sol_time + sol_tov)) fcoe_ctlr_solicit(fip, NULL); /* * Put this FCF at the head of the list for priority among equals. * This helps in the case of an NPV switch which insists we use * the FCF that answers multicast solicitations, not the others that * are sending periodic multicast advertisements. */ if (mtu_valid) { list_move(&fcf->list, &fip->fcfs); } /* * If this is the first validated FCF, note the time and * set a timer to trigger selection. * * Update FCF sel_time on new FCF aka FCF that is not in list * and FCF selection has not happened yet. */ if (mtu_valid && !fip->sel_fcf && fcoe_ctlr_fcf_usable(fcf)) { if (!found) { fip->sel_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); } if (!timer_pending(&fip->timer) || time_before(fip->sel_time, fip->timer.expires)) mod_timer(&fip->timer, fip->sel_time); } out: #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) } /** * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame * @fip: The FCoE controller which received the packet * @skb: The received FIP packet */ static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) { struct fc_lport *lport = fip->lp; struct fip_header *fiph; struct fc_frame *fp = (struct fc_frame *)skb; struct fc_frame_header *fh = NULL; struct fip_desc *desc; struct fip_encaps *els; struct fcoe_dev_stats *stats; enum fip_desc_type els_dtype = 0; u8 els_op; u8 sub; u8 granted_mac[ETH_ALEN] = { 0 }; size_t els_len = 0; size_t rlen; size_t dlen; fiph = (struct fip_header *)skb->data; sub = fiph->fip_subcode; if (sub != FIP_SC_REQ && sub != FIP_SC_REP) goto drop; rlen = ntohs(fiph->fip_dl_len) * 4; if (rlen + sizeof(*fiph) > skb->len) goto drop; desc = (struct fip_desc *)(fiph + 1); while (rlen > 0) { dlen = desc->fip_dlen * FIP_BPW; if (dlen < sizeof(*desc) || dlen > rlen) goto drop; switch (desc->fip_dtype) { case FIP_DT_MAC: if (dlen != sizeof(struct fip_mac_desc)) goto len_err; memcpy(granted_mac, ((struct fip_mac_desc *)desc)->fd_mac, ETH_ALEN); if (!is_valid_ether_addr(granted_mac)) { LIBFCOE_FIP_DBG(fip, "Invalid MAC address " "in FIP ELS\n"); goto drop; } memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); break; case FIP_DT_FLOGI: case FIP_DT_FDISC: case FIP_DT_LOGO: case FIP_DT_ELP: if (fh) goto drop; if (dlen < sizeof(*els) + sizeof(*fh) + 1) goto len_err; els_len = dlen - sizeof(*els); els = (struct fip_encaps *)desc; fh = (struct fc_frame_header *)(els + 1); els_dtype = desc->fip_dtype; break; default: LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " "in FIP adv\n", desc->fip_dtype); /* standard says ignore unknown descriptors >= 128 */ if (desc->fip_dtype < FIP_DT_VENDOR_BASE) goto drop; continue; } desc = (struct fip_desc *)((char *)desc + dlen); rlen -= dlen; } if (!fh) goto drop; els_op = *(u8 *)(fh + 1); #if defined(__VMKLNX__) /* * retry FLOGI on next available FCF if FLOGI fails. * This is for supporting NPV mode */ if (els_dtype == FIP_DT_FLOGI && sub == FIP_SC_REP && fip->flogi_oxid == ntohs(fh->fh_ox_id) && fip->mode != FIP_MODE_VN2VN ) { if (els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac)) { fip->flogi_oxid = FC_XID_UNKNOWN; } else if(fip->sel_fcf != NULL) { /* FLOGI failed, select next FCF */ LIBFCOE_FIP_DBG(fip, "FLOGI failed -Try next FCF\n"); fip->sel_fcf->flags &= ~FIP_FL_AVAIL; fcoe_ctlr_select(fip); if( fip->sel_fcf != NULL ) { memcpy(fip->dest_addr, fip->sel_fcf->fcf_mac, ETH_ALEN); fip->port_ka_time = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); fip->ctlr_ka_time = jiffies + fip->sel_fcf->fka_period; if (!timer_pending(&fip->timer) || time_before(fip->ctlr_ka_time, fip->timer.expires)) { mod_timer(&fip->timer, fip->ctlr_ka_time); } } } } #else /* !defined(__VMKLNX__) */ if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) && sub == FIP_SC_REP && els_op == ELS_LS_ACC && fip->mode != FIP_MODE_VN2VN) { if (!is_valid_ether_addr(granted_mac)) { LIBFCOE_FIP_DBG(fip, "Invalid MAC address %pM in FIP ELS\n", granted_mac); goto drop; } memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) fip->flogi_oxid = FC_XID_UNKNOWN; } #endif /* !defined(__VMKLNX__) */ /* * Convert skb into an fc_frame containing only the ELS. */ skb_pull(skb, (u8 *)fh - skb->data); skb_trim(skb, els_len); fp = (struct fc_frame *)skb; fc_frame_init(fp); fr_sof(fp) = FC_SOF_I3; fr_eof(fp) = FC_EOF_T; fr_dev(fp) = lport; fr_encaps(fp) = els_dtype; #if defined(__VMKLNX__) stats = FCOE_PER_CPU_PTR(lport->dev_stats, get_cpu(), sizeof(struct fcoe_dev_stats)); #else stats = per_cpu_ptr(lport->dev_stats, get_cpu()); #endif stats->RxFrames++; stats->RxWords += skb->len / FIP_BPW; put_cpu(); fc_exch_recv(lport, fp); return; len_err: LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", desc->fip_dtype, dlen); drop: kfree_skb(skb); } /** * fcoe_ctlr_recv_els() - Handle an incoming link reset frame * @fip: The FCoE controller that received the frame * @fh: The received FIP header * * There may be multiple VN_Port descriptors. * The overall length has already been checked. */ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, struct fip_header *fh) { struct fip_desc *desc; struct fip_mac_desc *mp; struct fip_wwn_desc *wp; struct fip_vn_desc *vp; size_t rlen; size_t dlen; struct fcoe_fcf *fcf = fip->sel_fcf; struct fc_lport *lport = fip->lp; u32 desc_mask; LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); if (!fcf || !fc_host_port_id(lport->host)) return; /* * mask of required descriptors. Validating each one clears its bit. */ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID); rlen = ntohs(fh->fip_dl_len) * FIP_BPW; desc = (struct fip_desc *)(fh + 1); while (rlen >= sizeof(*desc)) { dlen = desc->fip_dlen * FIP_BPW; if (dlen > rlen) return; switch (desc->fip_dtype) { case FIP_DT_MAC: mp = (struct fip_mac_desc *)desc; if (dlen < sizeof(*mp)) return; if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac)) return; desc_mask &= ~BIT(FIP_DT_MAC); break; case FIP_DT_NAME: wp = (struct fip_wwn_desc *)desc; if (dlen < sizeof(*wp)) return; if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) return; desc_mask &= ~BIT(FIP_DT_NAME); break; case FIP_DT_VN_ID: vp = (struct fip_vn_desc *)desc; if (dlen < sizeof(*vp)) return; if (compare_ether_addr(vp->fd_mac, fip->get_src_addr(lport)) != 0 || get_unaligned_be64(&vp->fd_wwpn) != lport->wwpn || ntoh24(vp->fd_fc_id) != fc_host_port_id(lport->host)) { LIBFCOE_FIP_DBG(fip, "incorrect Vx_Port Identification descriptor: " "fd_mac=%02x:%02x:%02x:%02x:%02x:%02x\n, fd_wwpn=%016llx, fd_fc_id=%02x%02x%02x\n", vp->fd_mac[0], vp->fd_mac[1], vp->fd_mac[2], vp->fd_mac[3], vp->fd_mac[4], vp->fd_mac[5], vp->fd_wwpn, vp->fd_fc_id[0], vp->fd_fc_id[1], vp->fd_fc_id[2]); return; } desc_mask &= ~BIT(FIP_DT_VN_ID); break; default: /* standard says ignore unknown descriptors >= 128 */ if (desc->fip_dtype < FIP_DT_VENDOR_BASE) return; break; } desc = (struct fip_desc *)((char *)desc + dlen); rlen -= dlen; } /* * reset only if all required descriptors were present and valid. */ if (desc_mask) { LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n", desc_mask); } else { LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n"); #if defined(__VMKLNX__) spin_lock_bh(fip->ctlr_lock); FCOE_PER_CPU_PTR(lport->dev_stats, smp_processor_id(), sizeof(struct fcoe_dev_stats))->VLinkFailureCount++; #else mutex_lock(&fip->ctlr_mutex); per_cpu_ptr(lport->dev_stats, smp_processor_id())->VLinkFailureCount++; #endif fcoe_ctlr_reset(fip); #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) fc_lport_reset(fip->lp); #if defined(__VMKLNX__) if (fip->vlan_id == FCOE_FIP_NO_VLAN_DISCOVERY) { fcoe_ctlr_solicit(fip, NULL); } else { fcoe_ctlr_vlan_request(fip); } #else /* !defined(__VMKLNX__) */ fcoe_ctlr_solicit(fip, NULL); #endif /* defined(__VMKLNX__) */ } } /** * fcoe_ctlr_recv() - Receive a FIP packet * @fip: The FCoE controller that received the packet * @skb: The received FIP packet * * This may be called from either NET_RX_SOFTIRQ or IRQ. */ /* _VMKLNX_CODECHECK_: fcoe_ctlr_recv */ void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) { skb_queue_tail(&fip->fip_recv_list, skb); schedule_work(&fip->recv_work); } EXPORT_SYMBOL(fcoe_ctlr_recv); /** * fcoe_ctlr_recv_handler() - Receive a FIP frame * @fip: The FCoE controller that received the frame * @skb: The received FIP frame * * Returns non-zero if the frame is dropped. */ static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) { struct fip_header *fiph; struct ethhdr *eh; enum fip_state state; u16 op; u8 sub; if (skb_linearize(skb)) goto drop; if (skb->len < sizeof(*fiph)) goto drop; eh = eth_hdr(skb); if (fip->mode == FIP_MODE_VN2VN) { if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && compare_ether_addr(eh->h_dest, fcoe_all_vn2vn) && compare_ether_addr(eh->h_dest, fcoe_all_p2p)) goto drop; } else if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && compare_ether_addr(eh->h_dest, fcoe_all_enode)) goto drop; fiph = (struct fip_header *)skb->data; op = ntohs(fiph->fip_op); sub = fiph->fip_subcode; if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) goto drop; if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) goto drop; #if defined(__VMKLNX__) spin_lock_bh(fip->ctlr_lock); #else mutex_lock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) state = fip->state; if (state == FIP_ST_AUTO) { fip->map_dest = 0; fip->state = FIP_ST_ENABLED; state = FIP_ST_ENABLED; LIBFCOE_FIP_DBG(fip, "Using FIP mode\n"); } #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN) return fcoe_ctlr_vn_recv(fip, skb); if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP && state != FIP_ST_VNMP_CLAIM) goto drop; if (op == FIP_OP_LS) { fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ return 0; } if (state != FIP_ST_ENABLED) goto drop; if (op == FIP_OP_DISC && sub == FIP_SC_ADV) fcoe_ctlr_recv_adv(fip, skb); else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) fcoe_ctlr_recv_clr_vlink(fip, fiph); #if defined(__VMKLNX__) else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_REP) { if (fip->vlan_id != FCOE_FIP_NO_VLAN_DISCOVERY) { fcoe_ctlr_recv_vlan_notification(fip, fiph); } } #endif /* defined(__VMKLNX__) */ kfree_skb(skb); return 0; drop: kfree_skb(skb); return -1; } /** * fcoe_ctlr_select() - Select the best FCF (if possible) * @fip: The FCoE controller * * If there are conflicting advertisements, no FCF can be chosen. * * Called with lock held. */ static void fcoe_ctlr_select(struct fcoe_ctlr *fip) { struct fcoe_fcf *fcf; struct fcoe_fcf *best = NULL; list_for_each_entry(fcf, &fip->fcfs, list) { LIBFCOE_FIP_DBG(fip, "consider FCF for fab %16.16llx " "VFID %d map %x val %d\n", fcf->fabric_name, fcf->vfid, fcf->fc_map, fcoe_ctlr_mtu_valid(fcf)); if (!fcoe_ctlr_fcf_usable(fcf)) { LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx " "map %x %svalid %savailable\n", fcf->fabric_name, fcf->fc_map, (fcf->flags & FIP_FL_SOL) ? "" : "in", (fcf->flags & FIP_FL_AVAIL) ? "" : "un"); continue; } if (!best) { best = fcf; continue; } if (fcf->fabric_name != best->fabric_name || fcf->vfid != best->vfid || fcf->fc_map != best->fc_map) { LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " "or FC-MAP\n"); return; } if (fcf->pri < best->pri) best = fcf; } fip->sel_fcf = best; } /** * fcoe_ctlr_timeout() - FIP timeout handler * @arg: The FCoE controller that timed out * * Ages FCFs. Triggers FCF selection if possible. Sends keep-alives. */ static void fcoe_ctlr_timeout(unsigned long arg) { struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg; struct fcoe_fcf *sel; struct fcoe_fcf *fcf; unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); #if defined(__VMKLNX__) spin_lock_bh(fip->ctlr_lock); #else mutex_lock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) if (fip->state == FIP_ST_DISABLED) { #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) return; } #if defined(__VMKLNX__) /* handle FIP VLAN request timeout */ if (0 == fip->vlan_id) { schedule_work(&fip->timer_work); #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) return; } #endif /* defined(__VMKLNX__) */ fcf = fip->sel_fcf; fcoe_ctlr_age_fcfs(fip); sel = fip->sel_fcf; if (!sel && fip->sel_time && time_after_eq(jiffies, fip->sel_time)) { fcoe_ctlr_select(fip); sel = fip->sel_fcf; fip->sel_time = 0; } if (sel != fcf) { fcf = sel; /* the old FCF may have been freed */ if (sel) { #if defined(__VMKLNX__) printk(KERN_INFO "libfcoe: host%d: FIP selected " "Fibre-Channel Forwarder MAC " "%02x:%02x:%02x:%02x:%02x:%02x\n", fip->lp->host->host_no, sel->fcf_mac[0], sel->fcf_mac[1], sel->fcf_mac[2], sel->fcf_mac[3], sel->fcf_mac[4], sel->fcf_mac[5]); #else /* !defined(__VMKLNX__) */ printk(KERN_INFO "libfcoe: host%d: FIP selected " "Fibre-Channel Forwarder MAC %pM\n", fip->lp->host->host_no, sel->fcf_mac); #endif /* defined(__VMKLNX__) */ memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN); fip->port_ka_time = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); fip->ctlr_ka_time = jiffies + sel->fka_period; if (time_after(next_timer, fip->ctlr_ka_time)) next_timer = fip->ctlr_ka_time; } else { printk(KERN_NOTICE "libfcoe: host%d: " "FIP Fibre-Channel Forwarder timed out. " "Starting FCF discovery.\n", fip->lp->host->host_no); fip->reset_req = 1; schedule_work(&fip->timer_work); } } if (sel && !sel->fd_flags) { if (time_after_eq(jiffies, fip->ctlr_ka_time)) { fip->ctlr_ka_time = jiffies + sel->fka_period; fip->send_ctlr_ka = 1; } if (time_after(next_timer, fip->ctlr_ka_time)) next_timer = fip->ctlr_ka_time; if (time_after_eq(jiffies, fip->port_ka_time)) { fip->port_ka_time = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); fip->send_port_ka = 1; } if (time_after(next_timer, fip->port_ka_time)) next_timer = fip->port_ka_time; mod_timer(&fip->timer, next_timer); } else if (fip->sel_time) { next_timer = fip->sel_time + msecs_to_jiffies(FCOE_CTLR_START_DELAY); mod_timer(&fip->timer, next_timer); } if (fip->send_ctlr_ka || fip->send_port_ka) schedule_work(&fip->timer_work); #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) } #if defined(__VMKLNX__) /** * fcoe_ctlr_l2_link_ok() - Check if L2 link is OK for the local port * @lport: The local port to check link on * * Returns: TRUE if L2 link is OK, FALSE otherwise */ static inline int fcoe_ctlr_l2_link_ok(struct fc_lport *lport) { struct net_device *netdev = NULL; if (lport->tt.get_cna_netdev) { netdev = lport->tt.get_cna_netdev(lport); VMK_ASSERT(netdev); } if (netdev && (netdev->flags & IFF_UP) && netif_carrier_ok(netdev)) { return TRUE; } return FALSE; } #endif /* defined(__VMKLNX__) */ /** * fcoe_ctlr_timer_work() - Worker thread function for timer work * @work: Handle to a FCoE controller * * Sends keep-alives and resets which must not * be called from the timer directly, since they use a mutex. */ static void fcoe_ctlr_timer_work(struct work_struct *work) { struct fcoe_ctlr *fip; struct fc_lport *vport; u8 *mac; int reset; fip = container_of(work, struct fcoe_ctlr, timer_work); if (fip->mode == FIP_MODE_VN2VN) { fcoe_ctlr_vn_timeout(fip); return; } #if defined(__VMKLNX__) spin_lock_bh(fip->ctlr_lock); #else mutex_lock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) reset = fip->reset_req; fip->reset_req = 0; #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) if (reset) { fc_lport_reset(fip->lp); #if defined(__VMKLNX__) /* * In Linux, FIP VLAN discovery is managed in userland. * For ESX, we drive VLAN discovery directly as we have * no userland agent for this purpose. */ if (fip->vlan_id == FCOE_FIP_NO_VLAN_DISCOVERY) { fcoe_ctlr_solicit(fip, NULL); } else { fcoe_ctlr_vlan_request(fip); } } else if (fcoe_ctlr_l2_link_ok(fip->lp) && (0 == fip->vlan_id)) { /* If L2 link is up, keep retrying VLAN discovery */ LIBFCOE_FIP_DBG(fip, "host%u: FIP VLAN ID unavail. " "Retry VLAN discovery.\n", fip->lp->host->host_no); fcoe_ctlr_vlan_request(fip); #endif /* defined(__VMKLNX__) */ } if (fip->send_ctlr_ka) { fip->send_ctlr_ka = 0; fcoe_ctlr_send_keep_alive(fip, fip->lp, 0, fip->ctl_src_addr); } if (fip->send_port_ka) { fip->send_port_ka = 0; mutex_lock(&fip->lp->lp_mutex); mac = fip->get_src_addr(fip->lp); fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); list_for_each_entry(vport, &fip->lp->vports, list) { mac = fip->get_src_addr(vport); fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); } mutex_unlock(&fip->lp->lp_mutex); } } /** * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames * @recv_work: Handle to a FCoE controller */ static void fcoe_ctlr_recv_work(struct work_struct *recv_work) { struct fcoe_ctlr *fip; struct sk_buff *skb; fip = container_of(recv_work, struct fcoe_ctlr, recv_work); while ((skb = skb_dequeue(&fip->fip_recv_list))) fcoe_ctlr_recv_handler(fip, skb); } /** * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response * @fip: The FCoE controller * @lport: not in use * @fp: The FC frame to snoop * * Snoop potential response to FLOGI or even incoming FLOGI. * * The caller has checked that we are waiting for login as indicated * by fip->flogi_oxid != FC_XID_UNKNOWN. * * The caller is responsible for freeing the frame. * Fill in the granted_mac address. * * Return non-zero if the frame should not be delivered to libfc. */ /* _VMKLNX_CODECHECK_: fcoe_ctlr_recv_flogi */ int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, struct fc_frame *fp) { struct fc_frame_header *fh; u8 op; u8 *sa; sa = eth_hdr(&fp->skb)->h_source; fh = fc_frame_header_get(fp); if (fh->fh_type != FC_TYPE_ELS) return 0; op = fc_frame_payload_op(fp); if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && fip->flogi_oxid == ntohs(fh->fh_ox_id)) { #if defined(__VMKLNX__) spin_lock_bh(fip->ctlr_lock); #else mutex_lock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) return -EINVAL; } fip->state = FIP_ST_NON_FIP; LIBFCOE_FIP_DBG(fip, "received FLOGI LS_ACC using non-FIP mode\n"); /* * FLOGI accepted. * If the src mac addr is FC_OUI-based, then we mark the * address_mode flag to use FC_OUI-based Ethernet DA. * Otherwise we use the FCoE gateway addr */ if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { fcoe_ctlr_map_dest(fip); } else { memcpy(fip->dest_addr, sa, ETH_ALEN); fip->map_dest = 0; } fip->flogi_oxid = FC_XID_UNKNOWN; #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id); } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { /* * Save source MAC for point-to-point responses. */ #if defined(__VMKLNX__) spin_lock_bh(fip->ctlr_lock); #else mutex_lock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { memcpy(fip->dest_addr, sa, ETH_ALEN); fip->map_dest = 0; if (fip->state == FIP_ST_AUTO) LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. " "Setting non-FIP mode\n"); fip->state = FIP_ST_NON_FIP; } #if defined(__VMKLNX__) spin_unlock_bh(fip->ctlr_lock); #else mutex_unlock(&fip->ctlr_mutex); #endif // defined(__VMKLNX__) } return 0; } EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); /** * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN * @mac: The MAC address to convert * @scheme: The scheme to use when converting * @port: The port indicator for converting * * Returns: u64 fc world wide name */ /* _VMKLNX_CODECHECK_: fcoe_wwn_from_mac */ u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], unsigned int scheme, unsigned int port) { u64 wwn; u64 host_mac; /* The MAC is in NO, so flip only the low 48 bits */ host_mac = ((u64) mac[0] << 40) | ((u64) mac[1] << 32) | ((u64) mac[2] << 24) | ((u64) mac[3] << 16) | ((u64) mac[4] << 8) | (u64) mac[5]; WARN_ON(host_mac >= (1ULL << 48)); wwn = host_mac | ((u64) scheme << 60); switch (scheme) { case 1: WARN_ON(port != 0); break; case 2: WARN_ON(port >= 0xfff); wwn |= (u64) port << 48; break; default: WARN_ON(1); break; } return wwn; } EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); /** * fcoe_libfc_config() - Sets up libfc related properties for local port * @lp: The local port to configure libfc for // * @fip: The FCoE controller in use by the local port * @tt: The libfc function template * * Returns : 0 for success */ /* _VMKLNX_CODECHECK_: fcoe_libfc_config */ int fcoe_libfc_config(struct fc_lport *lport, const struct libfc_function_template *tt) { /* Set the function pointers set by the LLDD */ memcpy(&lport->tt, tt, sizeof(*tt)); if (fc_fcp_init(lport)) return -ENOMEM; fc_exch_init(lport); fc_elsct_init(lport); fc_lport_init(lport); fc_rport_init(lport); fc_disc_init(lport); return 0; } EXPORT_SYMBOL_GPL(fcoe_libfc_config); #if defined(__VMKLNX__) /** * fcoe_ctlr_vlan_request() - Send FIP VLAN request. * @fip: The FCoE controller * * Return 0 on success; -1 on failure. */ static int fcoe_ctlr_vlan_request(struct fcoe_ctlr *fip) { struct sk_buff *skb; struct fip_vlan_req { struct ethhdr eth; struct fip_header fip; struct fip_mac_desc mac; } __attribute__((packed)) *vlan_req; struct net_device *netdev; VMK_ASSERT(fip->vlan_id != FCOE_FIP_NO_VLAN_DISCOVERY); skb = dev_alloc_skb(sizeof(*vlan_req)); if (!skb) { LIBFCOE_FIP_DBG(fip, "Cannot allocate skb\n"); return -1; } vlan_req = (struct fip_vlan_req *)skb->data; memset(vlan_req, 0, sizeof(*vlan_req)); memcpy(vlan_req->eth.h_dest, FIP_ALL_FCF_MACS, ETH_ALEN); memcpy(vlan_req->eth.h_source, fip->ctl_src_addr, ETH_ALEN); vlan_req->eth.h_proto = htons(ETH_P_FIP); vlan_req->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); vlan_req->fip.fip_op = htons(FIP_OP_VLAN); vlan_req->fip.fip_subcode = FIP_SC_VL_REQ; vlan_req->fip.fip_dl_len = htons(sizeof(vlan_req->mac) / FIP_BPW); vlan_req->fip.fip_flags = 0; vlan_req->mac.fd_desc.fip_dtype = FIP_DT_MAC; vlan_req->mac.fd_desc.fip_dlen = sizeof(vlan_req->mac) / FIP_BPW; memcpy(vlan_req->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); skb_put(skb, sizeof(*vlan_req)); skb->protocol = htons(ETH_P_FIP); skb_reset_mac_header(skb); skb_reset_network_header(skb); fip->vlan_id = 0; if ((fip->lp)->tt.get_cna_netdev) { netdev = (fip->lp)->tt.get_cna_netdev(fip->lp); VMK_ASSERT(netdev); if (vmklnx_cna_set_vlan_tag(netdev, 0) == -1) { LIBFCOE_FIP_DBG(fip, "%s: vmklnx_cna_set_vlan_tag() " "failed\n", __FUNCTION__); kfree_skb(skb); return -1; } } fip->send(fip, skb); #define VLAN_DISC_RETRY_TMO 2000 mod_timer(&fip->timer, jiffies + msecs_to_jiffies(VLAN_DISC_RETRY_TMO)); LIBFCOE_FIP_DBG(fip, "fcoe_ctlr_vlan_request() is done\n"); return 0; } /** * fcoe_ctlr_recv_vlan_notification() - Handle FIP VLAN notification. * @fip: The FCoE controller * @fh: FIP header * * Return 0 on success; -1 on failure. */ static int fcoe_ctlr_recv_vlan_notification(struct fcoe_ctlr *fip, struct fip_header *fh) { struct fip_desc *desc; struct fip_mac_desc *mp; struct fip_vlan_desc *vp; size_t rlen; size_t dlen; u32 desc_mask; u16 fd_vlan; u16 new_vlan = 0; int old_vlan_valid = 0; LIBFCOE_FIP_DBG(fip, "FIP VLAN notification received\n"); /* * mask of required descriptors. Validating each one clears its bit. */ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_VLAN); rlen = ntohs(fh->fip_dl_len) * FIP_BPW; desc = (struct fip_desc *)(fh + 1); while (rlen >= sizeof(*desc)) { dlen = desc->fip_dlen * FIP_BPW; if (dlen > rlen) { LIBFCOE_FIP_DBG(fip, "invalid dlen (%lu), larger than rlen (%lu)\n", dlen, rlen ); return -1; } switch (desc->fip_dtype) { case FIP_DT_MAC: mp = (struct fip_mac_desc *)desc; if (dlen < sizeof(*mp)) { LIBFCOE_FIP_DBG(fip, "invalid dlen (%lu) in " "FIP_DT_MAC descriptor\n", dlen ); return -1; } LIBFCOE_FIP_DBG(fip, "fd_mac=%x:%x:%x:%x:%x:%x\n", mp->fd_mac[0], mp->fd_mac[1], mp->fd_mac[2], mp->fd_mac[3], mp->fd_mac[4], mp->fd_mac[5] ); desc_mask &= ~BIT(FIP_DT_MAC); break; case FIP_DT_VLAN: vp = (struct fip_vlan_desc *)desc; if (dlen < sizeof(*vp)) { LIBFCOE_FIP_DBG(fip, "invalid dlen (%lu) in " "FIP_DT_VLAN descriptor\n", dlen ); return -1; } fd_vlan = ntohs(vp->fd_vlan); LIBFCOE_FIP_DBG(fip, "fd_vlan=%d\n", fd_vlan ); if (fd_vlan == fip->vlan_id) { old_vlan_valid = 1; } else if (0 == new_vlan) { new_vlan = fd_vlan; } desc_mask &= ~BIT(FIP_DT_VLAN); break; default: /* standard says ignore unknown descriptors >= 128 */ if (desc->fip_dtype < FIP_DT_VENDOR_BASE) { LIBFCOE_FIP_DBG(fip, "invalid fip_dtype (%d)\n", desc->fip_dtype ); return -1; } break; } desc = (struct fip_desc *)((char *)desc + dlen); rlen -= dlen; } if (desc_mask) { LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n", desc_mask); return -1; } if (!old_vlan_valid && (new_vlan != 0)) { struct net_device *netdev; if (new_vlan > VLAN_MAX_VALID_VID) { LIBFCOE_FIP_DBG(fip, "invalid vlan id %d, ignored\n", new_vlan); return -1; } fip->vlan_id = new_vlan; if ((fip->lp)->tt.get_cna_netdev) { netdev = (fip->lp)->tt.get_cna_netdev(fip->lp); VMK_ASSERT(netdev); if (vmklnx_cna_set_vlan_tag(netdev, fip->vlan_id) == -1) { LIBFCOE_FIP_DBG(fip, "%s: vmklnx_cna_set_vlan_tag() failed\n", __FUNCTION__); return -1; } } fcoe_ctlr_solicit(fip, NULL); } return 0; } #endif /* defined(__VMKLNX__) */