| /* |
| * 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 <linux/types.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/spinlock.h> |
| #include <linux/timer.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/netdevice.h> |
| #include <linux/errno.h> |
| #include <linux/bitops.h> |
| #include <net/rtnetlink.h> |
| |
| #include <scsi/fc/fc_els.h> |
| #include <scsi/fc/fc_fs.h> |
| #include <scsi/fc/fc_fip.h> |
| #include <scsi/fc/fc_encaps.h> |
| #include <scsi/fc/fc_fcoe.h> |
| |
| #include <scsi/libfc.h> |
| #include <scsi/libfcoe.h> |
| |
| MODULE_AUTHOR("Open-FCoE.org"); |
| MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs"); |
| MODULE_LICENSE("GPL v2"); |
| |
| #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */ |
| #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */ |
| |
| static void fcoe_ctlr_timeout(unsigned long); |
| static void fcoe_ctlr_link_work(struct work_struct *); |
| static void fcoe_ctlr_recv_work(struct work_struct *); |
| |
| static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
| |
| unsigned int libfcoe_debug_logging; |
| module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR); |
| MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); |
| |
| #define LIBFCOE_LOGGING 0x01 /* General logging, not categorized */ |
| #define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */ |
| |
| #define LIBFCOE_CHECK_LOGGING(LEVEL, CMD) \ |
| do { \ |
| if (unlikely(libfcoe_debug_logging & LEVEL)) \ |
| do { \ |
| CMD; \ |
| } while (0); \ |
| } while (0) |
| |
| #define LIBFCOE_DBG(fmt, args...) \ |
| LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING, \ |
| printk(KERN_INFO "libfcoe: " fmt, ##args);) |
| |
| #define LIBFCOE_FIP_DBG(fmt, args...) \ |
| LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \ |
| printk(KERN_INFO "fip: " fmt, ##args);) |
| |
| /* |
| * 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; |
| } |
| |
| /* |
| * 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_init() - Initialize the FCoE Controller instance. |
| * @fip: FCoE controller. |
| */ |
| void fcoe_ctlr_init(struct fcoe_ctlr *fip) |
| { |
| fip->state = FIP_ST_LINK_WAIT; |
| INIT_LIST_HEAD(&fip->fcfs); |
| spin_lock_init(&fip->lock); |
| fip->flogi_oxid = FC_XID_UNKNOWN; |
| setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); |
| INIT_WORK(&fip->link_work, fcoe_ctlr_link_work); |
| INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); |
| skb_queue_head_init(&fip->fip_recv_list); |
| } |
| EXPORT_SYMBOL(fcoe_ctlr_init); |
| |
| /** |
| * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller. |
| * @fip: FCoE controller. |
| * |
| * 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 the FCoE controller. |
| * @fip: FCoE controller. |
| * |
| * 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. |
| */ |
| void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) |
| { |
| flush_work(&fip->recv_work); |
| spin_lock_bh(&fip->lock); |
| fip->state = FIP_ST_DISABLED; |
| fcoe_ctlr_reset_fcfs(fip); |
| spin_unlock_bh(&fip->lock); |
| del_timer_sync(&fip->timer); |
| flush_work(&fip->link_work); |
| } |
| EXPORT_SYMBOL(fcoe_ctlr_destroy); |
| |
| /** |
| * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port. |
| * @fip: FCoE controller. |
| * |
| * Returns the maximum packet size including the FCoE header and trailer, |
| * but not including any Ethernet or VLAN headers. |
| */ |
| static inline 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 solicitation. |
| * @fip: FCoE controller. |
| * @fcf: 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; |
| |
| 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: FCoE controller. |
| * |
| * Called from the LLD when the network link is ready. |
| */ |
| void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) |
| { |
| spin_lock_bh(&fip->lock); |
| if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { |
| fip->last_link = 1; |
| fip->link = 1; |
| spin_unlock_bh(&fip->lock); |
| fc_linkup(fip->lp); |
| } else if (fip->state == FIP_ST_LINK_WAIT) { |
| fip->state = FIP_ST_AUTO; |
| fip->last_link = 1; |
| fip->link = 1; |
| spin_unlock_bh(&fip->lock); |
| LIBFCOE_FIP_DBG("%s", "setting AUTO mode.\n"); |
| fc_linkup(fip->lp); |
| fcoe_ctlr_solicit(fip, NULL); |
| } else |
| spin_unlock_bh(&fip->lock); |
| } |
| EXPORT_SYMBOL(fcoe_ctlr_link_up); |
| |
| /** |
| * fcoe_ctlr_reset() - Reset FIP. |
| * @fip: FCoE controller. |
| * @new_state: FIP state to be entered. |
| * |
| * Returns non-zero if the link was up and now isn't. |
| */ |
| static int fcoe_ctlr_reset(struct fcoe_ctlr *fip, enum fip_state new_state) |
| { |
| struct fc_lport *lp = fip->lp; |
| int link_dropped; |
| |
| spin_lock_bh(&fip->lock); |
| fcoe_ctlr_reset_fcfs(fip); |
| del_timer(&fip->timer); |
| fip->state = new_state; |
| fip->ctlr_ka_time = 0; |
| fip->port_ka_time = 0; |
| fip->sol_time = 0; |
| fip->flogi_oxid = FC_XID_UNKNOWN; |
| fip->map_dest = 0; |
| fip->last_link = 0; |
| link_dropped = fip->link; |
| fip->link = 0; |
| spin_unlock_bh(&fip->lock); |
| |
| if (link_dropped) |
| fc_linkdown(lp); |
| |
| if (new_state == FIP_ST_ENABLED) { |
| fcoe_ctlr_solicit(fip, NULL); |
| fc_linkup(lp); |
| link_dropped = 0; |
| } |
| return link_dropped; |
| } |
| |
| /** |
| * fcoe_ctlr_link_down() - Stop FCoE controller. |
| * @fip: FCoE controller. |
| * |
| * 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. |
| */ |
| int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) |
| { |
| return fcoe_ctlr_reset(fip, FIP_ST_LINK_WAIT); |
| } |
| EXPORT_SYMBOL(fcoe_ctlr_link_down); |
| |
| /** |
| * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF. |
| * @fip: FCoE controller. |
| * @ports: 0 for controller keep-alive, 1 for port keep-alive. |
| * @sa: 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, 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 = fcoe_ctlr_fcoe_size(fip) + sizeof(struct ethhdr); |
| BUG_ON(len < sizeof(*kal) + sizeof(*vn)); |
| skb = dev_alloc_skb(len); |
| if (!skb) |
| 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->data_src_addr, 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: FCoE controller. |
| * @dtype: FIP descriptor type for the frame. |
| * @skb: FCoE ELS frame including FC header but no FCoE headers. |
| * |
| * 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, |
| u8 dtype, struct sk_buff *skb) |
| { |
| struct fip_encaps_head { |
| struct ethhdr eth; |
| struct fip_header fip; |
| struct fip_encaps encaps; |
| } __attribute__((packed)) *cap; |
| struct fip_mac_desc *mac; |
| struct fcoe_fcf *fcf; |
| size_t dlen; |
| u16 fip_flags; |
| |
| fcf = fip->sel_fcf; |
| if (!fcf) |
| return -ENODEV; |
| |
| /* set flags according to both FCF and lport's capability on SPMA */ |
| fip_flags = fcf->flags; |
| fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : FIP_FL_FPMA; |
| if (!fip_flags) |
| return -ENODEV; |
| |
| 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)); |
| 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); |
| cap->fip.fip_subcode = FIP_SC_REQ; |
| cap->fip.fip_dl_len = htons((dlen + sizeof(*mac)) / FIP_BPW); |
| cap->fip.fip_flags = htons(fip_flags); |
| |
| cap->encaps.fd_desc.fip_dtype = dtype; |
| cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; |
| |
| 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) |
| memcpy(mac->fd_mac, fip->data_src_addr, ETH_ALEN); |
| else if (fip->spma) |
| memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); |
| |
| 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. |
| * @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). |
| */ |
| int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct sk_buff *skb) |
| { |
| struct fc_frame_header *fh; |
| u16 old_xid; |
| u8 op; |
| |
| fh = (struct fc_frame_header *)skb->data; |
| op = *(u8 *)(fh + 1); |
| |
| if (op == ELS_FLOGI) { |
| 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; |
| fip->map_dest = 1; |
| return 0; |
| } |
| if (fip->state == FIP_ST_NON_FIP) |
| fip->map_dest = 1; |
| } |
| |
| if (fip->state == FIP_ST_NON_FIP) |
| return 0; |
| |
| 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->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: |
| if (fip->flogi_oxid == FC_XID_UNKNOWN) |
| return 0; |
| if (!ntoh24(fh->fh_s_id)) |
| return 0; |
| if (fip->state == FIP_ST_AUTO) |
| return 0; |
| /* |
| * Here we must've 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. |
| */ |
| fip->flogi_oxid = FC_XID_UNKNOWN; |
| fc_fcoe_set_mac(fip->data_src_addr, fh->fh_s_id); |
| return 0; |
| default: |
| if (fip->state != FIP_ST_ENABLED) |
| goto drop; |
| return 0; |
| } |
| if (fcoe_ctlr_encaps(fip, op, skb)) |
| 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: FCoE controller. |
| * |
| * Called with lock held. |
| * |
| * 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. |
| */ |
| static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) |
| { |
| struct fcoe_fcf *fcf; |
| struct fcoe_fcf *next; |
| unsigned long sel_time = 0; |
| |
| list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { |
| if (time_after(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); |
| } else if (fcoe_ctlr_mtu_valid(fcf) && |
| (!sel_time || time_before(sel_time, fcf->time))) { |
| sel_time = fcf->time; |
| } |
| } |
| if (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); |
| } else { |
| fip->sel_time = 0; |
| } |
| } |
| |
| /** |
| * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry. |
| * @skb: received FIP advertisement frame |
| * @fcf: resulting FCF entry. |
| * |
| * Returns zero on a valid parsed advertisement, |
| * otherwise returns non zero value. |
| */ |
| static int fcoe_ctlr_parse_adv(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("Invalid MAC address " |
| "in FIP adv\n"); |
| 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; |
| 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("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 || !fcf->fabric_name) |
| return -EINVAL; |
| return 0; |
| |
| len_err: |
| LIBFCOE_FIP_DBG("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: FCoE controller. |
| * @skb: 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; |
| struct fcoe_fcf *found; |
| unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); |
| int first = 0; |
| int mtu_valid; |
| |
| if (fcoe_ctlr_parse_adv(skb, &new)) |
| return; |
| |
| spin_lock_bh(&fip->lock); |
| first = list_empty(&fip->fcfs); |
| found = NULL; |
| 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 = fcf; |
| 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. |
| */ |
| if (fcf == fip->sel_fcf) { |
| 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); |
| } else if (!fcoe_ctlr_fcf_usable(fcf)) |
| fcf->flags = new.flags; |
| 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("New FCF for fab %llx map %x val %d\n", |
| fcf->fabric_name, fcf->fc_map, mtu_valid); |
| } |
| |
| /* |
| * 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); |
| |
| /* |
| * If this is the first validated FCF, note the time and |
| * set a timer to trigger selection. |
| */ |
| if (mtu_valid && !fip->sel_time && fcoe_ctlr_fcf_usable(fcf)) { |
| 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: |
| spin_unlock_bh(&fip->lock); |
| } |
| |
| /** |
| * fcoe_ctlr_recv_els() - Handle an incoming FIP-encapsulated ELS frame. |
| * @fip: FCoE controller. |
| * @skb: Received FIP packet. |
| */ |
| static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) |
| { |
| struct fc_lport *lp = fip->lp; |
| struct fip_header *fiph; |
| struct fc_frame *fp; |
| 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("Invalid MAC address " |
| "in FIP ELS\n"); |
| goto drop; |
| } |
| 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("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 (els_dtype == FIP_DT_FLOGI && sub == FIP_SC_REP && |
| fip->flogi_oxid == ntohs(fh->fh_ox_id) && |
| els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac)) { |
| fip->flogi_oxid = FC_XID_UNKNOWN; |
| fip->update_mac(fip, fip->data_src_addr, granted_mac); |
| memcpy(fip->data_src_addr, granted_mac, ETH_ALEN); |
| } |
| |
| /* |
| * 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) = lp; |
| |
| stats = fc_lport_get_stats(lp); |
| stats->RxFrames++; |
| stats->RxWords += skb->len / FIP_BPW; |
| |
| fc_exch_recv(lp, fp); |
| return; |
| |
| len_err: |
| LIBFCOE_FIP_DBG("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: FCoE controller. |
| * @fh: 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 *lp = fip->lp; |
| u32 desc_mask; |
| |
| LIBFCOE_FIP_DBG("Clear Virtual Link received\n"); |
| if (!fcf) |
| return; |
| if (!fcf || !fc_host_port_id(lp->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->data_src_addr) == 0 && |
| get_unaligned_be64(&vp->fd_wwpn) == lp->wwpn && |
| ntoh24(vp->fd_fc_id) == fc_host_port_id(lp->host)) |
| 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("missing descriptors mask %x\n", desc_mask); |
| } else { |
| LIBFCOE_FIP_DBG("performing Clear Virtual Link\n"); |
| fcoe_ctlr_reset(fip, FIP_ST_ENABLED); |
| } |
| } |
| |
| /** |
| * fcoe_ctlr_recv() - Receive a FIP frame. |
| * @fip: FCoE controller. |
| * @skb: Received FIP packet. |
| * |
| * This is called from NET_RX_SOFTIRQ. |
| */ |
| void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) |
| { |
| spin_lock_bh(&fip->fip_recv_list.lock); |
| __skb_queue_tail(&fip->fip_recv_list, skb); |
| spin_unlock_bh(&fip->fip_recv_list.lock); |
| schedule_work(&fip->recv_work); |
| } |
| EXPORT_SYMBOL(fcoe_ctlr_recv); |
| |
| /** |
| * fcoe_ctlr_recv_handler() - Receive a FIP frame. |
| * @fip: FCoE controller. |
| * @skb: Received FIP packet. |
| * |
| * 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 (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && |
| compare_ether_addr(eh->h_dest, FIP_ALL_ENODE_MACS)) |
| 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; |
| |
| spin_lock_bh(&fip->lock); |
| state = fip->state; |
| if (state == FIP_ST_AUTO) { |
| fip->map_dest = 0; |
| fip->state = FIP_ST_ENABLED; |
| state = FIP_ST_ENABLED; |
| LIBFCOE_FIP_DBG("Using FIP mode\n"); |
| } |
| spin_unlock_bh(&fip->lock); |
| if (state != FIP_ST_ENABLED) |
| goto drop; |
| |
| if (op == FIP_OP_LS) { |
| fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ |
| return 0; |
| } |
| 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); |
| kfree_skb(skb); |
| return 0; |
| drop: |
| kfree_skb(skb); |
| return -1; |
| } |
| |
| /** |
| * fcoe_ctlr_select() - Select the best FCF, if possible. |
| * @fip: 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("consider FCF for fab %llx 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("FCF for fab %llx 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("Conflicting fabric, VFID, " |
| "or FC-MAP\n"); |
| return; |
| } |
| if (fcf->pri < best->pri) |
| best = fcf; |
| } |
| fip->sel_fcf = best; |
| } |
| |
| /** |
| * fcoe_ctlr_timeout() - FIP timer function. |
| * @arg: &fcoe_ctlr pointer. |
| * |
| * 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); |
| u8 send_ctlr_ka; |
| u8 send_port_ka; |
| |
| spin_lock_bh(&fip->lock); |
| if (fip->state == FIP_ST_DISABLED) { |
| spin_unlock_bh(&fip->lock); |
| return; |
| } |
| |
| 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) { |
| printk(KERN_INFO "libfcoe: host%d: FIP selected " |
| "Fibre-Channel Forwarder MAC %pM\n", |
| fip->lp->host->host_no, sel->fcf_mac); |
| 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; |
| fip->link = 1; |
| } else { |
| printk(KERN_NOTICE "libfcoe: host%d: " |
| "FIP Fibre-Channel Forwarder timed out. " |
| "Starting FCF discovery.\n", |
| fip->lp->host->host_no); |
| fip->link = 0; |
| } |
| schedule_work(&fip->link_work); |
| } |
| |
| send_ctlr_ka = 0; |
| send_port_ka = 0; |
| if (sel) { |
| if (time_after_eq(jiffies, fip->ctlr_ka_time)) { |
| fip->ctlr_ka_time = jiffies + sel->fka_period; |
| 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); |
| 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); |
| } |
| spin_unlock_bh(&fip->lock); |
| |
| if (send_ctlr_ka) |
| fcoe_ctlr_send_keep_alive(fip, 0, fip->ctl_src_addr); |
| if (send_port_ka) |
| fcoe_ctlr_send_keep_alive(fip, 1, fip->data_src_addr); |
| } |
| |
| /** |
| * fcoe_ctlr_link_work() - worker thread function for link changes. |
| * @work: pointer to link_work member inside &fcoe_ctlr. |
| * |
| * See if the link status has changed and if so, report it. |
| * |
| * This is here because fc_linkup() and fc_linkdown() must not |
| * be called from the timer directly, since they use a mutex. |
| */ |
| static void fcoe_ctlr_link_work(struct work_struct *work) |
| { |
| struct fcoe_ctlr *fip; |
| int link; |
| int last_link; |
| |
| fip = container_of(work, struct fcoe_ctlr, link_work); |
| spin_lock_bh(&fip->lock); |
| last_link = fip->last_link; |
| link = fip->link; |
| fip->last_link = link; |
| spin_unlock_bh(&fip->lock); |
| |
| if (last_link != link) { |
| if (link) |
| fc_linkup(fip->lp); |
| else |
| fcoe_ctlr_reset(fip, FIP_ST_LINK_WAIT); |
| } |
| } |
| |
| /** |
| * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames. |
| * @recv_work: pointer to recv_work member inside &fcoe_ctlr. |
| */ |
| 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); |
| spin_lock_bh(&fip->fip_recv_list.lock); |
| while ((skb = __skb_dequeue(&fip->fip_recv_list))) { |
| spin_unlock_bh(&fip->fip_recv_list.lock); |
| fcoe_ctlr_recv_handler(fip, skb); |
| spin_lock_bh(&fip->fip_recv_list.lock); |
| } |
| spin_unlock_bh(&fip->fip_recv_list.lock); |
| } |
| |
| /** |
| * fcoe_ctlr_recv_flogi() - snoop Pre-FIP receipt of FLOGI response or request. |
| * @fip: FCoE controller. |
| * @fp: FC frame. |
| * @sa: Ethernet source MAC address from received FCoE frame. |
| * |
| * 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. |
| * |
| * Return non-zero if the frame should not be delivered to libfc. |
| */ |
| int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_frame *fp, u8 *sa) |
| { |
| struct fc_frame_header *fh; |
| u8 op; |
| u8 mac[ETH_ALEN]; |
| |
| 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)) { |
| |
| spin_lock_bh(&fip->lock); |
| if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { |
| spin_unlock_bh(&fip->lock); |
| return -EINVAL; |
| } |
| fip->state = FIP_ST_NON_FIP; |
| LIBFCOE_FIP_DBG("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)) { |
| fip->map_dest = 1; |
| } else { |
| memcpy(fip->dest_addr, sa, ETH_ALEN); |
| fip->map_dest = 0; |
| } |
| fip->flogi_oxid = FC_XID_UNKNOWN; |
| memcpy(mac, fip->data_src_addr, ETH_ALEN); |
| fc_fcoe_set_mac(fip->data_src_addr, fh->fh_d_id); |
| spin_unlock_bh(&fip->lock); |
| |
| fip->update_mac(fip, mac, fip->data_src_addr); |
| } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { |
| /* |
| * Save source MAC for point-to-point responses. |
| */ |
| spin_lock_bh(&fip->lock); |
| 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_NON_FIP) |
| LIBFCOE_FIP_DBG("received FLOGI REQ, " |
| "using non-FIP mode\n"); |
| fip->state = FIP_ST_NON_FIP; |
| } |
| spin_unlock_bh(&fip->lock); |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); |
| |
| /** |
| * fcoe_wwn_from_mac() - Converts 48-bit IEEE MAC address to 64-bit FC WWN. |
| * @mac: mac address |
| * @scheme: check port |
| * @port: port indicator for converting |
| * |
| * Returns: u64 fc world wide name |
| */ |
| 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 lport |
| * @lp: ptr to the fc_lport |
| * @tt: libfc function template |
| * |
| * Returns : 0 for success |
| */ |
| int fcoe_libfc_config(struct fc_lport *lp, struct libfc_function_template *tt) |
| { |
| /* Set the function pointers set by the LLDD */ |
| memcpy(&lp->tt, tt, sizeof(*tt)); |
| if (fc_fcp_init(lp)) |
| return -ENOMEM; |
| fc_exch_init(lp); |
| fc_elsct_init(lp); |
| fc_lport_init(lp); |
| fc_rport_init(lp); |
| fc_disc_init(lp); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(fcoe_libfc_config); |