--- /dev/null
+/*
+ * 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/errno.h>
+#include <linux/bitops.h>
+#include <linux/slab.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/fc/fc_fcp.h>
+
+#include <scsi/libfc.h>
+#include <scsi/libfcoe.h>
+
+#include "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_timer_work(struct work_struct *);
+static void fcoe_ctlr_recv_work(struct work_struct *);
+static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *);
+
+static void fcoe_ctlr_vn_start(struct fcoe_ctlr *);
+static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *);
+static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *);
+static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *);
+
+static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
+static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS;
+static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS;
+static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_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");
+
+static const char * const fcoe_ctlr_states[] = {
+ [FIP_ST_DISABLED] = "DISABLED",
+ [FIP_ST_LINK_WAIT] = "LINK_WAIT",
+ [FIP_ST_AUTO] = "AUTO",
+ [FIP_ST_NON_FIP] = "NON_FIP",
+ [FIP_ST_ENABLED] = "ENABLED",
+ [FIP_ST_VNMP_START] = "VNMP_START",
+ [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1",
+ [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2",
+ [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM",
+ [FIP_ST_VNMP_UP] = "VNMP_UP",
+};
+
+static const char *fcoe_ctlr_state(enum fip_state state)
+{
+ const char *cp = "unknown";
+
+ if (state < ARRAY_SIZE(fcoe_ctlr_states))
+ cp = fcoe_ctlr_states[state];
+ if (!cp)
+ cp = "unknown";
+ return cp;
+}
+
+/**
+ * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state.
+ * @fip: The FCoE controller
+ * @state: The new state
+ */
+static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state)
+{
+ if (state == fip->state)
+ return;
+ if (fip->lp)
+ LIBFCOE_FIP_DBG(fip, "state %s -> %s\n",
+ fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state));
+ fip->state = state;
+}
+
+/**
+ * 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
+ */
+static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip)
+{
+ if (fip->mode == FIP_MODE_VN2VN)
+ hton24(fip->dest_addr, FIP_VN_FC_MAP);
+ else
+ hton24(fip->dest_addr, FIP_DEF_FC_MAP);
+ hton24(fip->dest_addr + 3, 0);
+ fip->map_dest = 1;
+}
+
+/**
+ * fcoe_ctlr_init() - Initialize the FCoE Controller instance
+ * @fip: The FCoE controller to initialize
+ */
+void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode)
+{
+ fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
+ fip->mode = mode;
+ INIT_LIST_HEAD(&fip->fcfs);
+ mutex_init(&fip->ctlr_mutex);
+ spin_lock_init(&fip->ctlr_lock);
+ 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);
+
+/**
+ * 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.
+ */
+void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
+{
+ cancel_work_sync(&fip->recv_work);
+ skb_queue_purge(&fip->fip_recv_list);
+
+ mutex_lock(&fip->ctlr_mutex);
+ fcoe_ctlr_set_state(fip, FIP_ST_DISABLED);
+ fcoe_ctlr_reset_fcfs(fip);
+ mutex_unlock(&fip->ctlr_mutex);
+ del_timer_sync(&fip->timer);
+ cancel_work_sync(&fip->timer_work);
+}
+EXPORT_SYMBOL(fcoe_ctlr_destroy);
+
+/**
+ * fcoe_ctlr_announce() - announce new FCF selection
+ * @fip: The FCoE controller
+ *
+ * Also sets the destination MAC for FCoE and control packets
+ *
+ * Called with neither ctlr_mutex nor ctlr_lock held.
+ */
+static void fcoe_ctlr_announce(struct fcoe_ctlr *fip)
+{
+ struct fcoe_fcf *sel;
+ struct fcoe_fcf *fcf;
+
+ mutex_lock(&fip->ctlr_mutex);
+ spin_lock_bh(&fip->ctlr_lock);
+
+ kfree_skb(fip->flogi_req);
+ fip->flogi_req = NULL;
+ list_for_each_entry(fcf, &fip->fcfs, list)
+ fcf->flogi_sent = 0;
+
+ spin_unlock_bh(&fip->ctlr_lock);
+ sel = fip->sel_fcf;
+
+ if (sel && !compare_ether_addr(sel->fcf_mac, fip->dest_addr))
+ goto unlock;
+ if (!is_zero_ether_addr(fip->dest_addr)) {
+ printk(KERN_NOTICE "libfcoe: host%d: "
+ "FIP Fibre-Channel Forwarder MAC %pM deselected\n",
+ fip->lp->host->host_no, fip->dest_addr);
+ memset(fip->dest_addr, 0, ETH_ALEN);
+ }
+ 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->map_dest = 0;
+ }
+unlock:
+ mutex_unlock(&fip->ctlr_mutex);
+}
+
+/**
+ * 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.
+ */
+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 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;
+ } __packed desc;
+ } __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: The FCoE controller to start
+ *
+ * Called from the LLD when the network link is ready.
+ */
+void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
+{
+ mutex_lock(&fip->ctlr_mutex);
+ if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) {
+ mutex_unlock(&fip->ctlr_mutex);
+ fc_linkup(fip->lp);
+ } else if (fip->state == FIP_ST_LINK_WAIT) {
+ fcoe_ctlr_set_state(fip, 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");
+ /* fall-through */
+ case FIP_MODE_FABRIC:
+ case FIP_MODE_NON_FIP:
+ mutex_unlock(&fip->ctlr_mutex);
+ fc_linkup(fip->lp);
+ fcoe_ctlr_solicit(fip, NULL);
+ break;
+ case FIP_MODE_VN2VN:
+ fcoe_ctlr_vn_start(fip);
+ mutex_unlock(&fip->ctlr_mutex);
+ fc_linkup(fip->lp);
+ break;
+ }
+ } else
+ mutex_unlock(&fip->ctlr_mutex);
+}
+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);
+ del_timer(&fip->timer);
+ fip->ctlr_ka_time = 0;
+ fip->port_ka_time = 0;
+ fip->sol_time = 0;
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ fcoe_ctlr_map_dest(fip);
+}
+
+/**
+ * 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.
+ */
+int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
+{
+ int link_dropped;
+
+ LIBFCOE_FIP_DBG(fip, "link down.\n");
+ mutex_lock(&fip->ctlr_mutex);
+ fcoe_ctlr_reset(fip);
+ link_dropped = fip->state != FIP_ST_LINK_WAIT;
+ fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
+ mutex_unlock(&fip->ctlr_mutex);
+
+ 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;
+ } __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 || (ports && !lp->port_id))
+ return;
+
+ len = sizeof(*kal) + ports * 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->get_src_addr(lport), ETH_ALEN);
+ hton24(vn->fd_fc_id, lport->port_id);
+ put_unaligned_be64(lport->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
+ * @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;
+ } __packed * cap;
+ struct fc_frame_header *fh;
+ struct fip_mac_desc *mac;
+ struct fcoe_fcf *fcf;
+ size_t dlen;
+ u16 fip_flags;
+ u8 op;
+
+ 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);
+ hton24(mac->fd_mac + 3, 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).
+ * The the skb must also be an fc_frame.
+ *
+ * This is called from the lower-level driver with spinlocks held,
+ * so we must not take a mutex here.
+ */
+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)
+ fcoe_ctlr_map_dest(fip);
+ }
+
+ 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;
+ if (fip->mode == FIP_MODE_VN2VN)
+ break;
+ spin_lock_bh(&fip->ctlr_lock);
+ kfree_skb(fip->flogi_req);
+ fip->flogi_req = skb;
+ fip->flogi_req_send = 1;
+ spin_unlock_bh(&fip->ctlr_lock);
+ schedule_work(&fip->timer_work);
+ return -EINPROGRESS;
+ 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:
+ /*
+ * 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 two advertisements.
+ * That is, there have been no valid advertisement from it for 2.5
+ * times its keep-alive period.
+ *
+ * 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).
+ *
+ * Returns the time in jiffies for the next call.
+ */
+static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
+{
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf *next;
+ unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
+ unsigned long deadline;
+ unsigned long sel_time = 0;
+ struct fcoe_dev_stats *stats;
+
+ stats = per_cpu_ptr(fip->lp->dev_stats, get_cpu());
+
+ list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
+ deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2;
+ if (fip->sel_fcf == fcf) {
+ if (time_after(jiffies, deadline)) {
+ 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);
+ } else if (time_after(next_timer, deadline))
+ next_timer = deadline;
+ }
+
+ deadline += fcf->fka_period;
+ if (time_after_eq(jiffies, deadline)) {
+ if (fip->sel_fcf == fcf)
+ fip->sel_fcf = NULL;
+ list_del(&fcf->list);
+ WARN_ON(!fip->fcf_count);
+ fip->fcf_count--;
+ kfree(fcf);
+ stats->VLinkFailureCount++;
+ } else {
+ if (time_after(next_timer, deadline))
+ next_timer = deadline;
+ if (fcoe_ctlr_mtu_valid(fcf) &&
+ (!sel_time || time_before(sel_time, fcf->time)))
+ sel_time = fcf->time;
+ }
+ }
+ put_cpu();
+ if (sel_time && !fip->sel_fcf && !fip->sel_time) {
+ sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY);
+ fip->sel_time = sel_time;
+ }
+
+ return next_timer;
+}
+
+/**
+ * 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;
+ u32 desc_mask;
+
+ 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);
+
+ /*
+ * mask of required descriptors. validating each one clears its bit.
+ */
+ desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
+ BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA);
+
+ 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;
+ /* Drop Adv if there are duplicate critical descriptors */
+ if ((desc->fip_dtype < 32) &&
+ !(desc_mask & 1U << desc->fip_dtype)) {
+ LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
+ "Descriptors in FIP adv\n");
+ 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;
+ desc_mask &= ~BIT(FIP_DT_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;
+ }
+ desc_mask &= ~BIT(FIP_DT_MAC);
+ 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);
+ desc_mask &= ~BIT(FIP_DT_NAME);
+ 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);
+ desc_mask &= ~BIT(FIP_DT_FAB);
+ 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);
+ desc_mask &= ~BIT(FIP_DT_FKA);
+ 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;
+ break;
+ }
+ 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;
+ if (desc_mask) {
+ LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n",
+ desc_mask);
+ 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;
+ 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(fip, skb, &new))
+ return;
+
+ mutex_lock(&fip->ctlr_mutex);
+ 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 {
+ /*
+ * Update the FCF's keep-alive descriptor flags.
+ * Other flag changes from new advertisements are
+ * ignored after a solicited advertisement is
+ * received and the FCF is selectable (usable).
+ */
+ 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 fab %16.16llx mac %pM\n",
+ fcf->fabric_name, fcf->fcf_mac);
+
+ /*
+ * 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_del(&fcf->list);
+ list_add(&fcf->list, &fip->fcfs);
+ }
+
+ /*
+ * If this is the first validated FCF, note the time and
+ * set a timer to trigger selection.
+ */
+ if (mtu_valid && !fip->sel_fcf && 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:
+ mutex_unlock(&fip->ctlr_mutex);
+}
+
+/**
+ * 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;
+ u32 desc_mask = 0;
+ u32 desc_cnt = 0;
+
+ 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) {
+ desc_cnt++;
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen < sizeof(*desc) || dlen > rlen)
+ goto drop;
+ /* Drop ELS if there are duplicate critical descriptors */
+ if (desc->fip_dtype < 32) {
+ if (desc_mask & 1U << desc->fip_dtype) {
+ LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
+ "Descriptors in FIP ELS\n");
+ goto drop;
+ }
+ desc_mask |= (1 << desc->fip_dtype);
+ }
+ switch (desc->fip_dtype) {
+ case FIP_DT_MAC:
+ if (desc_cnt == 1) {
+ LIBFCOE_FIP_DBG(fip, "FIP descriptors "
+ "received out of order\n");
+ goto drop;
+ }
+
+ if (dlen != sizeof(struct fip_mac_desc))
+ goto len_err;
+ memcpy(granted_mac,
+ ((struct fip_mac_desc *)desc)->fd_mac,
+ ETH_ALEN);
+ break;
+ case FIP_DT_FLOGI:
+ case FIP_DT_FDISC:
+ case FIP_DT_LOGO:
+ case FIP_DT_ELP:
+ if (desc_cnt != 1) {
+ LIBFCOE_FIP_DBG(fip, "FIP descriptors "
+ "received out of order\n");
+ goto drop;
+ }
+ 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;
+ if (desc_cnt <= 2) {
+ LIBFCOE_FIP_DBG(fip, "FIP descriptors "
+ "received out of order\n");
+ goto drop;
+ }
+ break;
+ }
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
+ }
+
+ if (!fh)
+ goto drop;
+ els_op = *(u8 *)(fh + 1);
+
+ if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) &&
+ sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) {
+ if (els_op == ELS_LS_ACC) {
+ 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;
+ if (els_dtype == FIP_DT_FLOGI)
+ fcoe_ctlr_announce(fip);
+ }
+ } else if (els_dtype == FIP_DT_FLOGI &&
+ !fcoe_ctlr_flogi_retry(fip))
+ goto drop; /* retrying FLOGI so drop reject */
+ }
+
+ if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) &&
+ (!(1U << FIP_DT_MAC & desc_mask)))) {
+ LIBFCOE_FIP_DBG(fip, "Missing critical descriptors "
+ "in FIP ELS\n");
+ goto drop;
+ }
+
+ /*
+ * 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;
+
+ stats = per_cpu_ptr(lport->dev_stats, get_cpu());
+ 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;
+ struct fc_lport *vn_port = NULL;
+ u32 desc_mask;
+ int is_vn_port = 0;
+
+ LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
+
+ if (!fcf || !lport->port_id)
+ 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;
+ /* Drop CVL if there are duplicate critical descriptors */
+ if ((desc->fip_dtype < 32) &&
+ !(desc_mask & 1U << desc->fip_dtype)) {
+ LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
+ "Descriptors in FIP CVL\n");
+ 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) == lport->port_id) {
+ desc_mask &= ~BIT(FIP_DT_VN_ID);
+ break;
+ }
+ /* check if clr_vlink is for NPIV port */
+ mutex_lock(&lport->lp_mutex);
+ list_for_each_entry(vn_port, &lport->vports, list) {
+ if (compare_ether_addr(vp->fd_mac,
+ fip->get_src_addr(vn_port)) == 0 &&
+ (get_unaligned_be64(&vp->fd_wwpn)
+ == vn_port->wwpn) &&
+ (ntoh24(vp->fd_fc_id) ==
+ fc_host_port_id(vn_port->host))) {
+ desc_mask &= ~BIT(FIP_DT_VN_ID);
+ is_vn_port = 1;
+ break;
+ }
+ }
+ mutex_unlock(&lport->lp_mutex);
+
+ 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 (is_vn_port)
+ fc_lport_reset(vn_port);
+ else {
+ mutex_lock(&fip->ctlr_mutex);
+ per_cpu_ptr(lport->dev_stats,
+ get_cpu())->VLinkFailureCount++;
+ put_cpu();
+ fcoe_ctlr_reset(fip);
+ mutex_unlock(&fip->ctlr_mutex);
+
+ fc_lport_reset(fip->lp);
+ fcoe_ctlr_solicit(fip, NULL);
+ }
+ }
+}
+
+/**
+ * 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.
+ */
+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;
+
+ mutex_lock(&fip->ctlr_mutex);
+ state = fip->state;
+ if (state == FIP_ST_AUTO) {
+ fip->map_dest = 0;
+ fcoe_ctlr_set_state(fip, FIP_ST_ENABLED);
+ state = FIP_ST_ENABLED;
+ LIBFCOE_FIP_DBG(fip, "Using FIP mode\n");
+ }
+ mutex_unlock(&fip->ctlr_mutex);
+
+ 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);
+ kfree_skb(skb);
+ return 0;
+drop:
+ kfree_skb(skb);
+ return -1;
+}
+
+/**
+ * fcoe_ctlr_select() - Select the best FCF (if possible)
+ * @fip: The FCoE controller
+ *
+ * Returns the selected FCF, or NULL if none are usable.
+ *
+ * If there are conflicting advertisements, no FCF can be chosen.
+ *
+ * If there is already a selected FCF, this will choose a better one or
+ * an equivalent one that hasn't already been sent a FLOGI.
+ *
+ * Called with lock held.
+ */
+static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip)
+{
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf *best = fip->sel_fcf;
+ struct fcoe_fcf *first;
+
+ first = list_first_entry(&fip->fcfs, struct fcoe_fcf, list);
+
+ list_for_each_entry(fcf, &fip->fcfs, list) {
+ LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx "
+ "VFID %d mac %pM map %x val %d "
+ "sent %u pri %u\n",
+ fcf->fabric_name, fcf->vfid, fcf->fcf_mac,
+ fcf->fc_map, fcoe_ctlr_mtu_valid(fcf),
+ fcf->flogi_sent, fcf->pri);
+ if (fcf->fabric_name != first->fabric_name ||
+ fcf->vfid != first->vfid ||
+ fcf->fc_map != first->fc_map) {
+ LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, "
+ "or FC-MAP\n");
+ return NULL;
+ }
+ if (fcf->flogi_sent)
+ continue;
+ 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 || fcf->pri < best->pri || best->flogi_sent)
+ best = fcf;
+ }
+ fip->sel_fcf = best;
+ if (best) {
+ LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac);
+ fip->port_ka_time = jiffies +
+ msecs_to_jiffies(FIP_VN_KA_PERIOD);
+ fip->ctlr_ka_time = jiffies + best->fka_period;
+ if (time_before(fip->ctlr_ka_time, fip->timer.expires))
+ mod_timer(&fip->timer, fip->ctlr_ka_time);
+ }
+ return best;
+}
+
+/**
+ * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF
+ * @fip: The FCoE controller
+ *
+ * Returns non-zero error if it could not be sent.
+ *
+ * Called with ctlr_mutex and ctlr_lock held.
+ * Caller must verify that fip->sel_fcf is not NULL.
+ */
+static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip)
+{
+ struct sk_buff *skb;
+ struct sk_buff *skb_orig;
+ struct fc_frame_header *fh;
+ int error;
+
+ skb_orig = fip->flogi_req;
+ if (!skb_orig)
+ return -EINVAL;
+
+ /*
+ * Clone and send the FLOGI request. If clone fails, use original.
+ */
+ skb = skb_clone(skb_orig, GFP_ATOMIC);
+ if (!skb) {
+ skb = skb_orig;
+ fip->flogi_req = NULL;
+ }
+ fh = (struct fc_frame_header *)skb->data;
+ error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb,
+ ntoh24(fh->fh_d_id));
+ if (error) {
+ kfree_skb(skb);
+ return error;
+ }
+ fip->send(fip, skb);
+ fip->sel_fcf->flogi_sent = 1;
+ return 0;
+}
+
+/**
+ * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible
+ * @fip: The FCoE controller
+ *
+ * Returns non-zero error code if there's no FLOGI request to retry or
+ * no alternate FCF available.
+ */
+static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip)
+{
+ struct fcoe_fcf *fcf;
+ int error;
+
+ mutex_lock(&fip->ctlr_mutex);
+ spin_lock_bh(&fip->ctlr_lock);
+ LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n");
+ fcf = fcoe_ctlr_select(fip);
+ if (!fcf || fcf->flogi_sent) {
+ kfree_skb(fip->flogi_req);
+ fip->flogi_req = NULL;
+ error = -ENOENT;
+ } else {
+ fcoe_ctlr_solicit(fip, NULL);
+ error = fcoe_ctlr_flogi_send_locked(fip);
+ }
+ spin_unlock_bh(&fip->ctlr_lock);
+ mutex_unlock(&fip->ctlr_mutex);
+ return error;
+}
+
+
+/**
+ * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI.
+ * @fip: The FCoE controller that timed out
+ *
+ * Done here because fcoe_ctlr_els_send() can't get mutex.
+ *
+ * Called with ctlr_mutex held. The caller must not hold ctlr_lock.
+ */
+static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip)
+{
+ struct fcoe_fcf *fcf;
+
+ spin_lock_bh(&fip->ctlr_lock);
+ fcf = fip->sel_fcf;
+ if (!fcf || !fip->flogi_req_send)
+ goto unlock;
+
+ LIBFCOE_FIP_DBG(fip, "sending FLOGI\n");
+
+ /*
+ * If this FLOGI is being sent due to a timeout retry
+ * to the same FCF as before, select a different FCF if possible.
+ */
+ if (fcf->flogi_sent) {
+ LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n");
+ fcf = fcoe_ctlr_select(fip);
+ if (!fcf || fcf->flogi_sent) {
+ LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n");
+ list_for_each_entry(fcf, &fip->fcfs, list)
+ fcf->flogi_sent = 0;
+ fcf = fcoe_ctlr_select(fip);
+ }
+ }
+ if (fcf) {
+ fcoe_ctlr_flogi_send_locked(fip);
+ fip->flogi_req_send = 0;
+ } else /* XXX */
+ LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n");
+unlock:
+ spin_unlock_bh(&fip->ctlr_lock);
+}
+
+/**
+ * fcoe_ctlr_timeout() - FIP timeout handler
+ * @arg: The FCoE controller that timed out
+ */
+static void fcoe_ctlr_timeout(unsigned long arg)
+{
+ struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg;
+
+ schedule_work(&fip->timer_work);
+}
+
+/**
+ * fcoe_ctlr_timer_work() - Worker thread function for timer work
+ * @work: Handle to a FCoE controller
+ *
+ * Ages FCFs. Triggers FCF selection if possible.
+ * Sends keep-alives and resets.
+ */
+static void fcoe_ctlr_timer_work(struct work_struct *work)
+{
+ struct fcoe_ctlr *fip;
+ struct fc_lport *vport;
+ u8 *mac;
+ u8 reset = 0;
+ u8 send_ctlr_ka = 0;
+ u8 send_port_ka = 0;
+ struct fcoe_fcf *sel;
+ struct fcoe_fcf *fcf;
+ unsigned long next_timer;
+
+ fip = container_of(work, struct fcoe_ctlr, timer_work);
+ if (fip->mode == FIP_MODE_VN2VN)
+ return fcoe_ctlr_vn_timeout(fip);
+ mutex_lock(&fip->ctlr_mutex);
+ if (fip->state == FIP_ST_DISABLED) {
+ mutex_unlock(&fip->ctlr_mutex);
+ return;
+ }
+
+ fcf = fip->sel_fcf;
+ next_timer = fcoe_ctlr_age_fcfs(fip);
+
+ sel = fip->sel_fcf;
+ if (!sel && fip->sel_time) {
+ if (time_after_eq(jiffies, fip->sel_time)) {
+ sel = fcoe_ctlr_select(fip);
+ fip->sel_time = 0;
+ } else if (time_after(next_timer, fip->sel_time))
+ next_timer = fip->sel_time;
+ }
+
+ if (sel && fip->flogi_req_send)
+ fcoe_ctlr_flogi_send(fip);
+ else if (!sel && fcf)
+ reset = 1;
+
+ if (sel && !sel->fd_flags) {
+ 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;
+ }
+ if (!list_empty(&fip->fcfs))
+ mod_timer(&fip->timer, next_timer);
+ mutex_unlock(&fip->ctlr_mutex);
+
+ if (reset) {
+ fc_lport_reset(fip->lp);
+ /* restart things with a solicitation */
+ fcoe_ctlr_solicit(fip, NULL);
+ }
+
+ if (send_ctlr_ka)
+ fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
+
+ if (send_port_ka) {
+ 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
+ * @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.
+ */
+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)) {
+
+ mutex_lock(&fip->ctlr_mutex);
+ if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
+ mutex_unlock(&fip->ctlr_mutex);
+ return -EINVAL;
+ }
+ fcoe_ctlr_set_state(fip, 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;
+ mutex_unlock(&fip->ctlr_mutex);
+ 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.
+ */
+ mutex_lock(&fip->ctlr_mutex);
+ 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");
+ fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
+ }
+ mutex_unlock(&fip->ctlr_mutex);
+ }
+ 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
+ */
+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_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv
+ * @rdata: libfc remote port
+ */
+static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata)
+{
+ return (struct fcoe_rport *)(rdata + 1);
+}
+
+/**
+ * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply.
+ * @fip: The FCoE controller
+ * @sub: sub-opcode for probe request, reply, or advertisement.
+ * @dest: The destination Ethernet MAC address
+ * @min_len: minimum size of the Ethernet payload to be sent
+ */
+static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip,
+ enum fip_vn2vn_subcode sub,
+ const u8 *dest, size_t min_len)
+{
+ struct sk_buff *skb;
+ struct fip_frame {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct fip_mac_desc mac;
+ struct fip_wwn_desc wwnn;
+ struct fip_vn_desc vn;
+ } __packed * frame;
+ struct fip_fc4_feat *ff;
+ struct fip_size_desc *size;
+ u32 fcp_feat;
+ size_t len;
+ size_t dlen;
+
+ len = sizeof(*frame);
+ dlen = 0;
+ if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
+ dlen = sizeof(struct fip_fc4_feat) +
+ sizeof(struct fip_size_desc);
+ len += dlen;
+ }
+ dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn);
+ len = max(len, min_len + sizeof(struct ethhdr));
+
+ skb = dev_alloc_skb(len);
+ if (!skb)
+ return;
+
+ frame = (struct fip_frame *)skb->data;
+ memset(frame, 0, len);
+ memcpy(frame->eth.h_dest, dest, ETH_ALEN);
+ memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
+ frame->eth.h_proto = htons(ETH_P_FIP);
+
+ frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ frame->fip.fip_op = htons(FIP_OP_VN2VN);
+ frame->fip.fip_subcode = sub;
+ frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
+
+ frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
+ frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
+ memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
+
+ frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
+ frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW;
+ put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn);
+
+ frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID;
+ frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW;
+ hton24(frame->vn.fd_mac, FIP_VN_FC_MAP);
+ hton24(frame->vn.fd_mac + 3, fip->port_id);
+ hton24(frame->vn.fd_fc_id, fip->port_id);
+ put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn);
+
+ /*
+ * For claims, add FC-4 features.
+ * TBD: Add interface to get fc-4 types and features from libfc.
+ */
+ if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
+ ff = (struct fip_fc4_feat *)(frame + 1);
+ ff->fd_desc.fip_dtype = FIP_DT_FC4F;
+ ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW;
+ ff->fd_fts = fip->lp->fcts;
+
+ fcp_feat = 0;
+ if (fip->lp->service_params & FCP_SPPF_INIT_FCN)
+ fcp_feat |= FCP_FEAT_INIT;
+ if (fip->lp->service_params & FCP_SPPF_TARG_FCN)
+ fcp_feat |= FCP_FEAT_TARG;
+ fcp_feat <<= (FC_TYPE_FCP * 4) % 32;
+ ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat);
+
+ size = (struct fip_size_desc *)(ff + 1);
+ size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
+ size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW;
+ size->fd_size = htons(fcoe_ctlr_fcoe_size(fip));
+ }
+
+ 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_vn_rport_callback - Event handler for rport events.
+ * @lport: The lport which is receiving the event
+ * @rdata: remote port private data
+ * @event: The event that occured
+ *
+ * Locking Note: The rport lock must not be held when calling this function.
+ */
+static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport,
+ struct fc_rport_priv *rdata,
+ enum fc_rport_event event)
+{
+ struct fcoe_ctlr *fip = lport->disc.priv;
+ struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
+
+ LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n",
+ rdata->ids.port_id, event);
+
+ mutex_lock(&fip->ctlr_mutex);
+ switch (event) {
+ case RPORT_EV_READY:
+ frport->login_count = 0;
+ break;
+ case RPORT_EV_LOGO:
+ case RPORT_EV_FAILED:
+ case RPORT_EV_STOP:
+ frport->login_count++;
+ if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) {
+ LIBFCOE_FIP_DBG(fip,
+ "rport FLOGI limited port_id %6.6x\n",
+ rdata->ids.port_id);
+ lport->tt.rport_logoff(rdata);
+ }
+ break;
+ default:
+ break;
+ }
+ mutex_unlock(&fip->ctlr_mutex);
+}
+
+static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = {
+ .event_callback = fcoe_ctlr_vn_rport_callback,
+};
+
+/**
+ * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode
+ * @fip: The FCoE controller
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport)
+{
+ mutex_lock(&lport->disc.disc_mutex);
+ lport->disc.disc_callback = NULL;
+ mutex_unlock(&lport->disc.disc_mutex);
+}
+
+/**
+ * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode
+ * @fip: The FCoE controller
+ *
+ * Called through the local port template for discovery.
+ * Called without the ctlr_mutex held.
+ */
+static void fcoe_ctlr_disc_stop(struct fc_lport *lport)
+{
+ struct fcoe_ctlr *fip = lport->disc.priv;
+
+ mutex_lock(&fip->ctlr_mutex);
+ fcoe_ctlr_disc_stop_locked(lport);
+ mutex_unlock(&fip->ctlr_mutex);
+}
+
+/**
+ * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode
+ * @fip: The FCoE controller
+ *
+ * Called through the local port template for discovery.
+ * Called without the ctlr_mutex held.
+ */
+static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport)
+{
+ fcoe_ctlr_disc_stop(lport);
+ lport->tt.rport_flush_queue();
+ synchronize_rcu();
+}
+
+/**
+ * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id
+ * @fip: The FCoE controller
+ *
+ * Called with fcoe_ctlr lock held.
+ */
+static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
+{
+ unsigned long wait;
+ u32 port_id;
+
+ fcoe_ctlr_disc_stop_locked(fip->lp);
+
+ /*
+ * Get proposed port ID.
+ * If this is the first try after link up, use any previous port_id.
+ * If there was none, use the low bits of the port_name.
+ * On subsequent tries, get the next random one.
+ * Don't use reserved IDs, use another non-zero value, just as random.
+ */
+ port_id = fip->port_id;
+ if (fip->probe_tries)
+ port_id = prandom32(&fip->rnd_state) & 0xffff;
+ else if (!port_id)
+ port_id = fip->lp->wwpn & 0xffff;
+ if (!port_id || port_id == 0xffff)
+ port_id = 1;
+ fip->port_id = port_id;
+
+ if (fip->probe_tries < FIP_VN_RLIM_COUNT) {
+ fip->probe_tries++;
+ wait = random32() % FIP_VN_PROBE_WAIT;
+ } else
+ wait = FIP_VN_RLIM_INT;
+ mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait));
+ fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START);
+}
+
+/**
+ * fcoe_ctlr_vn_start() - Start in VN2VN mode
+ * @fip: The FCoE controller
+ *
+ * Called with fcoe_ctlr lock held.
+ */
+static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip)
+{
+ fip->probe_tries = 0;
+ prandom32_seed(&fip->rnd_state, fip->lp->wwpn);
+ fcoe_ctlr_vn_restart(fip);
+}
+
+/**
+ * fcoe_ctlr_vn_parse - parse probe request or response
+ * @fip: The FCoE controller
+ * @skb: incoming packet
+ * @rdata: buffer for resulting parsed VN entry plus fcoe_rport
+ *
+ * Returns non-zero error number on error.
+ * Does not consume the packet.
+ */
+static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip,
+ struct sk_buff *skb,
+ struct fc_rport_priv *rdata)
+{
+ struct fip_header *fiph;
+ struct fip_desc *desc = NULL;
+ struct fip_mac_desc *macd = NULL;
+ struct fip_wwn_desc *wwn = NULL;
+ struct fip_vn_desc *vn = NULL;
+ struct fip_size_desc *size = NULL;
+ struct fcoe_rport *frport;
+ size_t rlen;
+ size_t dlen;
+ u32 desc_mask = 0;
+ u32 dtype;
+ u8 sub;
+
+ memset(rdata, 0, sizeof(*rdata) + sizeof(*frport));
+ frport = fcoe_ctlr_rport(rdata);
+
+ fiph = (struct fip_header *)skb->data;
+ frport->flags = ntohs(fiph->fip_flags);
+
+ sub = fiph->fip_subcode;
+ switch (sub) {
+ case FIP_SC_VN_PROBE_REQ:
+ case FIP_SC_VN_PROBE_REP:
+ case FIP_SC_VN_BEACON:
+ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
+ BIT(FIP_DT_VN_ID);
+ break;
+ case FIP_SC_VN_CLAIM_NOTIFY:
+ case FIP_SC_VN_CLAIM_REP:
+ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
+ BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) |
+ BIT(FIP_DT_FCOE_SIZE);
+ break;
+ default:
+ LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
+ return -EINVAL;
+ }
+
+ 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;
+
+ dtype = desc->fip_dtype;
+ if (dtype < 32) {
+ if (!(desc_mask & BIT(dtype))) {
+ LIBFCOE_FIP_DBG(fip,
+ "unexpected or duplicated desc "
+ "desc type %u in "
+ "FIP VN2VN subtype %u\n",
+ dtype, sub);
+ return -EINVAL;
+ }
+ desc_mask &= ~BIT(dtype);
+ }
+
+ switch (dtype) {
+ case FIP_DT_MAC:
+ if (dlen != sizeof(struct fip_mac_desc))
+ goto len_err;
+ macd = (struct fip_mac_desc *)desc;
+ if (!is_valid_ether_addr(macd->fd_mac)) {
+ LIBFCOE_FIP_DBG(fip,
+ "Invalid MAC addr %pM in FIP VN2VN\n",
+ macd->fd_mac);
+ return -EINVAL;
+ }
+ memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
+ break;
+ case FIP_DT_NAME:
+ if (dlen != sizeof(struct fip_wwn_desc))
+ goto len_err;
+ wwn = (struct fip_wwn_desc *)desc;
+ rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn);
+ break;
+ case FIP_DT_VN_ID:
+ if (dlen != sizeof(struct fip_vn_desc))
+ goto len_err;
+ vn = (struct fip_vn_desc *)desc;
+ memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN);
+ rdata->ids.port_id = ntoh24(vn->fd_fc_id);
+ rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn);
+ break;
+ case FIP_DT_FC4F:
+ if (dlen != sizeof(struct fip_fc4_feat))
+ goto len_err;
+ break;
+ case FIP_DT_FCOE_SIZE:
+ if (dlen != sizeof(struct fip_size_desc))
+ goto len_err;
+ size = (struct fip_size_desc *)desc;
+ frport->fcoe_len = ntohs(size->fd_size);
+ break;
+ default:
+ LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
+ "in FIP probe\n", dtype);
+ /* standard says ignore unknown descriptors >= 128 */
+ if (dtype < FIP_DT_VENDOR_BASE)
+ return -EINVAL;
+ break;
+ }
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
+ }
+ return 0;
+
+len_err:
+ LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
+ dtype, dlen);
+ return -EINVAL;
+}
+
+/**
+ * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification.
+ * @fip: The FCoE controller
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip)
+{
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0);
+ fip->sol_time = jiffies;
+}
+
+/**
+ * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request.
+ * @fip: The FCoE controller
+ * @rdata: parsed remote port with frport from the probe request
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip,
+ struct fc_rport_priv *rdata)
+{
+ struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
+
+ if (rdata->ids.port_id != fip->port_id)
+ return;
+
+ switch (fip->state) {
+ case FIP_ST_VNMP_CLAIM:
+ case FIP_ST_VNMP_UP:
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
+ frport->enode_mac, 0);
+ break;
+ case FIP_ST_VNMP_PROBE1:
+ case FIP_ST_VNMP_PROBE2:
+ /*
+ * Decide whether to reply to the Probe.
+ * Our selected address is never a "recorded" one, so
+ * only reply if our WWPN is greater and the
+ * Probe's REC bit is not set.
+ * If we don't reply, we will change our address.
+ */
+ if (fip->lp->wwpn > rdata->ids.port_name &&
+ !(frport->flags & FIP_FL_REC_OR_P2P)) {
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
+ frport->enode_mac, 0);
+ break;
+ }
+ /* fall through */
+ case FIP_ST_VNMP_START:
+ fcoe_ctlr_vn_restart(fip);
+ break;
+ default:
+ break;
+ }
+}
+
+/**
+ * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply.
+ * @fip: The FCoE controller
+ * @rdata: parsed remote port with frport from the probe request
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip,
+ struct fc_rport_priv *rdata)
+{
+ if (rdata->ids.port_id != fip->port_id)
+ return;
+ switch (fip->state) {
+ case FIP_ST_VNMP_START:
+ case FIP_ST_VNMP_PROBE1:
+ case FIP_ST_VNMP_PROBE2:
+ case FIP_ST_VNMP_CLAIM:
+ fcoe_ctlr_vn_restart(fip);
+ break;
+ case FIP_ST_VNMP_UP:
+ fcoe_ctlr_vn_send_claim(fip);
+ break;
+ default:
+ break;
+ }
+}
+
+/**
+ * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply.
+ * @fip: The FCoE controller
+ * @new: newly-parsed remote port with frport as a template for new rdata
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new)
+{
+ struct fc_lport *lport = fip->lp;
+ struct fc_rport_priv *rdata;
+ struct fc_rport_identifiers *ids;
+ struct fcoe_rport *frport;
+ u32 port_id;
+
+ port_id = new->ids.port_id;
+ if (port_id == fip->port_id)
+ return;
+
+ mutex_lock(&lport->disc.disc_mutex);
+ rdata = lport->tt.rport_create(lport, port_id);
+ if (!rdata) {
+ mutex_unlock(&lport->disc.disc_mutex);
+ return;
+ }
+
+ rdata->ops = &fcoe_ctlr_vn_rport_ops;
+ rdata->disc_id = lport->disc.disc_id;
+
+ ids = &rdata->ids;
+ if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) ||
+ (ids->node_name != -1 && ids->node_name != new->ids.node_name))
+ lport->tt.rport_logoff(rdata);
+ ids->port_name = new->ids.port_name;
+ ids->node_name = new->ids.node_name;
+ mutex_unlock(&lport->disc.disc_mutex);
+
+ frport = fcoe_ctlr_rport(rdata);
+ LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n",
+ port_id, frport->fcoe_len ? "old" : "new");
+ *frport = *fcoe_ctlr_rport(new);
+ frport->time = 0;
+}
+
+/**
+ * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address
+ * @fip: The FCoE controller
+ * @port_id: The port_id of the remote VN_node
+ * @mac: buffer which will hold the VN_NODE destination MAC address, if found.
+ *
+ * Returns non-zero error if no remote port found.
+ */
+static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac)
+{
+ struct fc_lport *lport = fip->lp;
+ struct fc_rport_priv *rdata;
+ struct fcoe_rport *frport;
+ int ret = -1;
+
+ rcu_read_lock();
+ rdata = lport->tt.rport_lookup(lport, port_id);
+ if (rdata) {
+ frport = fcoe_ctlr_rport(rdata);
+ memcpy(mac, frport->enode_mac, ETH_ALEN);
+ ret = 0;
+ }
+ rcu_read_unlock();
+ return ret;
+}
+
+/**
+ * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification
+ * @fip: The FCoE controller
+ * @new: newly-parsed remote port with frport as a template for new rdata
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip,
+ struct fc_rport_priv *new)
+{
+ struct fcoe_rport *frport = fcoe_ctlr_rport(new);
+
+ if (frport->flags & FIP_FL_REC_OR_P2P) {
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
+ return;
+ }
+ switch (fip->state) {
+ case FIP_ST_VNMP_START:
+ case FIP_ST_VNMP_PROBE1:
+ case FIP_ST_VNMP_PROBE2:
+ if (new->ids.port_id == fip->port_id)
+ fcoe_ctlr_vn_restart(fip);
+ break;
+ case FIP_ST_VNMP_CLAIM:
+ case FIP_ST_VNMP_UP:
+ if (new->ids.port_id == fip->port_id) {
+ if (new->ids.port_name > fip->lp->wwpn) {
+ fcoe_ctlr_vn_restart(fip);
+ break;
+ }
+ fcoe_ctlr_vn_send_claim(fip);
+ break;
+ }
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac,
+ min((u32)frport->fcoe_len,
+ fcoe_ctlr_fcoe_size(fip)));
+ fcoe_ctlr_vn_add(fip, new);
+ break;
+ default:
+ break;
+ }
+}
+
+/**
+ * fcoe_ctlr_vn_claim_resp() - handle received Claim Response
+ * @fip: The FCoE controller that received the frame
+ * @new: newly-parsed remote port with frport from the Claim Response
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip,
+ struct fc_rport_priv *new)
+{
+ LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n",
+ new->ids.port_id, fcoe_ctlr_state(fip->state));
+ if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM)
+ fcoe_ctlr_vn_add(fip, new);
+}
+
+/**
+ * fcoe_ctlr_vn_beacon() - handle received beacon.
+ * @fip: The FCoE controller that received the frame
+ * @new: newly-parsed remote port with frport from the Beacon
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip,
+ struct fc_rport_priv *new)
+{
+ struct fc_lport *lport = fip->lp;
+ struct fc_rport_priv *rdata;
+ struct fcoe_rport *frport;
+
+ frport = fcoe_ctlr_rport(new);
+ if (frport->flags & FIP_FL_REC_OR_P2P) {
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
+ return;
+ }
+ mutex_lock(&lport->disc.disc_mutex);
+ rdata = lport->tt.rport_lookup(lport, new->ids.port_id);
+ if (rdata)
+ kref_get(&rdata->kref);
+ mutex_unlock(&lport->disc.disc_mutex);
+ if (rdata) {
+ if (rdata->ids.node_name == new->ids.node_name &&
+ rdata->ids.port_name == new->ids.port_name) {
+ frport = fcoe_ctlr_rport(rdata);
+ if (!frport->time && fip->state == FIP_ST_VNMP_UP)
+ lport->tt.rport_login(rdata);
+ frport->time = jiffies;
+ }
+ kref_put(&rdata->kref, lport->tt.rport_destroy);
+ return;
+ }
+ if (fip->state != FIP_ST_VNMP_UP)
+ return;
+
+ /*
+ * Beacon from a new neighbor.
+ * Send a claim notify if one hasn't been sent recently.
+ * Don't add the neighbor yet.
+ */
+ LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n",
+ new->ids.port_id);
+ if (time_after(jiffies,
+ fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT)))
+ fcoe_ctlr_vn_send_claim(fip);
+}
+
+/**
+ * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons
+ * @fip: The FCoE controller
+ *
+ * Called with ctlr_mutex held.
+ * Called only in state FIP_ST_VNMP_UP.
+ * Returns the soonest time for next age-out or a time far in the future.
+ */
+static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip)
+{
+ struct fc_lport *lport = fip->lp;
+ struct fc_rport_priv *rdata;
+ struct fcoe_rport *frport;
+ unsigned long next_time;
+ unsigned long deadline;
+
+ next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10);
+ mutex_lock(&lport->disc.disc_mutex);
+ list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
+ frport = fcoe_ctlr_rport(rdata);
+ if (!frport->time)
+ continue;
+ deadline = frport->time +
+ msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10);
+ if (time_after_eq(jiffies, deadline)) {
+ frport->time = 0;
+ LIBFCOE_FIP_DBG(fip,
+ "port %16.16llx fc_id %6.6x beacon expired\n",
+ rdata->ids.port_name, rdata->ids.port_id);
+ lport->tt.rport_logoff(rdata);
+ } else if (time_before(deadline, next_time))
+ next_time = deadline;
+ }
+ mutex_unlock(&lport->disc.disc_mutex);
+ return next_time;
+}
+
+/**
+ * fcoe_ctlr_vn_recv() - 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.
+ * Always consumes the frame.
+ */
+static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
+{
+ struct fip_header *fiph;
+ enum fip_vn2vn_subcode sub;
+ struct {
+ struct fc_rport_priv rdata;
+ struct fcoe_rport frport;
+ } buf;
+ int rc;
+
+ fiph = (struct fip_header *)skb->data;
+ sub = fiph->fip_subcode;
+
+ rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata);
+ if (rc) {
+ LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc);
+ goto drop;
+ }
+
+ mutex_lock(&fip->ctlr_mutex);
+ switch (sub) {
+ case FIP_SC_VN_PROBE_REQ:
+ fcoe_ctlr_vn_probe_req(fip, &buf.rdata);
+ break;
+ case FIP_SC_VN_PROBE_REP:
+ fcoe_ctlr_vn_probe_reply(fip, &buf.rdata);
+ break;
+ case FIP_SC_VN_CLAIM_NOTIFY:
+ fcoe_ctlr_vn_claim_notify(fip, &buf.rdata);
+ break;
+ case FIP_SC_VN_CLAIM_REP:
+ fcoe_ctlr_vn_claim_resp(fip, &buf.rdata);
+ break;
+ case FIP_SC_VN_BEACON:
+ fcoe_ctlr_vn_beacon(fip, &buf.rdata);
+ break;
+ default:
+ LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub);
+ rc = -1;
+ break;
+ }
+ mutex_unlock(&fip->ctlr_mutex);
+drop:
+ kfree_skb(skb);
+ return rc;
+}
+
+/**
+ * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode.
+ * @lport: The local port
+ * @fp: The received frame
+ *
+ * This should never be called since we don't see RSCNs or other
+ * fabric-generated ELSes.
+ */
+static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp)
+{
+ struct fc_seq_els_data rjt_data;
+
+ rjt_data.reason = ELS_RJT_UNSUP;
+ rjt_data.explan = ELS_EXPL_NONE;
+ lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
+ fc_frame_free(fp);
+}
+
+/**
+ * fcoe_ctlr_disc_recv - start discovery for VN2VN mode.
+ * @fip: The FCoE controller
+ *
+ * This sets a flag indicating that remote ports should be created
+ * and started for the peers we discover. We use the disc_callback
+ * pointer as that flag. Peers already discovered are created here.
+ *
+ * The lport lock is held during this call. The callback must be done
+ * later, without holding either the lport or discovery locks.
+ * The fcoe_ctlr lock may also be held during this call.
+ */
+static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *,
+ enum fc_disc_event),
+ struct fc_lport *lport)
+{
+ struct fc_disc *disc = &lport->disc;
+ struct fcoe_ctlr *fip = disc->priv;
+
+ mutex_lock(&disc->disc_mutex);
+ disc->disc_callback = callback;
+ disc->disc_id = (disc->disc_id + 2) | 1;
+ disc->pending = 1;
+ schedule_work(&fip->timer_work);
+ mutex_unlock(&disc->disc_mutex);
+}
+
+/**
+ * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state.
+ * @fip: The FCoE controller
+ *
+ * Starts the FLOGI and PLOGI login process to each discovered rport for which
+ * we've received at least one beacon.
+ * Performs the discovery complete callback.
+ */
+static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip)
+{
+ struct fc_lport *lport = fip->lp;
+ struct fc_disc *disc = &lport->disc;
+ struct fc_rport_priv *rdata;
+ struct fcoe_rport *frport;
+ void (*callback)(struct fc_lport *, enum fc_disc_event);
+
+ mutex_lock(&disc->disc_mutex);
+ callback = disc->pending ? disc->disc_callback : NULL;
+ disc->pending = 0;
+ list_for_each_entry_rcu(rdata, &disc->rports, peers) {
+ frport = fcoe_ctlr_rport(rdata);
+ if (frport->time)
+ lport->tt.rport_login(rdata);
+ }
+ mutex_unlock(&disc->disc_mutex);
+ if (callback)
+ callback(lport, DISC_EV_SUCCESS);
+}
+
+/**
+ * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode.
+ * @fip: The FCoE controller
+ */
+static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
+{
+ unsigned long next_time;
+ u8 mac[ETH_ALEN];
+ u32 new_port_id = 0;
+
+ mutex_lock(&fip->ctlr_mutex);
+ switch (fip->state) {
+ case FIP_ST_VNMP_START:
+ fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1);
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
+ next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT);
+ break;
+ case FIP_ST_VNMP_PROBE1:
+ fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2);
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
+ next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
+ break;
+ case FIP_ST_VNMP_PROBE2:
+ fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM);
+ new_port_id = fip->port_id;
+ hton24(mac, FIP_VN_FC_MAP);
+ hton24(mac + 3, new_port_id);
+ fcoe_ctlr_map_dest(fip);
+ fip->update_mac(fip->lp, mac);
+ fcoe_ctlr_vn_send_claim(fip);
+ next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
+ break;
+ case FIP_ST_VNMP_CLAIM:
+ /*
+ * This may be invoked either by starting discovery so don't
+ * go to the next state unless it's been long enough.
+ */
+ next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT);
+ if (time_after_eq(jiffies, next_time)) {
+ fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP);
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
+ fcoe_all_vn2vn, 0);
+ next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
+ fip->port_ka_time = next_time;
+ }
+ fcoe_ctlr_vn_disc(fip);
+ break;
+ case FIP_ST_VNMP_UP:
+ next_time = fcoe_ctlr_vn_age(fip);
+ if (time_after_eq(jiffies, fip->port_ka_time)) {
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
+ fcoe_all_vn2vn, 0);
+ fip->port_ka_time = jiffies +
+ msecs_to_jiffies(FIP_VN_BEACON_INT +
+ (random32() % FIP_VN_BEACON_FUZZ));
+ }
+ if (time_before(fip->port_ka_time, next_time))
+ next_time = fip->port_ka_time;
+ break;
+ case FIP_ST_LINK_WAIT:
+ goto unlock;
+ default:
+ WARN(1, "unexpected state %d\n", fip->state);
+ goto unlock;
+ }
+ mod_timer(&fip->timer, next_time);
+unlock:
+ mutex_unlock(&fip->ctlr_mutex);
+
+ /* If port ID is new, notify local port after dropping ctlr_mutex */
+ if (new_port_id)
+ fc_lport_set_local_id(fip->lp, new_port_id);
+}
+
+/**
+ * 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
+ * @init_fcp: If non-zero, the FCP portion of libfc should be initialized
+ *
+ * Returns : 0 for success
+ */
+int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip,
+ const struct libfc_function_template *tt, int init_fcp)
+{
+ /* Set the function pointers set by the LLDD */
+ memcpy(&lport->tt, tt, sizeof(*tt));
+ if (init_fcp && fc_fcp_init(lport))
+ return -ENOMEM;
+ fc_exch_init(lport);
+ fc_elsct_init(lport);
+ fc_lport_init(lport);
+ if (fip->mode == FIP_MODE_VN2VN)
+ lport->rport_priv_size = sizeof(struct fcoe_rport);
+ fc_rport_init(lport);
+ if (fip->mode == FIP_MODE_VN2VN) {
+ lport->point_to_multipoint = 1;
+ lport->tt.disc_recv_req = fcoe_ctlr_disc_recv;
+ lport->tt.disc_start = fcoe_ctlr_disc_start;
+ lport->tt.disc_stop = fcoe_ctlr_disc_stop;
+ lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final;
+ mutex_init(&lport->disc.disc_mutex);
+ INIT_LIST_HEAD(&lport->disc.rports);
+ lport->disc.priv = fip;
+ } else {
+ fc_disc_init(lport);
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_libfc_config);
+++ /dev/null
-/*
- * 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/errno.h>
-#include <linux/bitops.h>
-#include <linux/slab.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/fc/fc_fcp.h>
-
-#include <scsi/libfc.h>
-#include <scsi/libfcoe.h>
-
-#include "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_timer_work(struct work_struct *);
-static void fcoe_ctlr_recv_work(struct work_struct *);
-static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *);
-
-static void fcoe_ctlr_vn_start(struct fcoe_ctlr *);
-static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *);
-static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *);
-static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *);
-
-static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
-static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS;
-static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS;
-static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_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");
-
-static const char *fcoe_ctlr_states[] = {
- [FIP_ST_DISABLED] = "DISABLED",
- [FIP_ST_LINK_WAIT] = "LINK_WAIT",
- [FIP_ST_AUTO] = "AUTO",
- [FIP_ST_NON_FIP] = "NON_FIP",
- [FIP_ST_ENABLED] = "ENABLED",
- [FIP_ST_VNMP_START] = "VNMP_START",
- [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1",
- [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2",
- [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM",
- [FIP_ST_VNMP_UP] = "VNMP_UP",
-};
-
-static const char *fcoe_ctlr_state(enum fip_state state)
-{
- const char *cp = "unknown";
-
- if (state < ARRAY_SIZE(fcoe_ctlr_states))
- cp = fcoe_ctlr_states[state];
- if (!cp)
- cp = "unknown";
- return cp;
-}
-
-/**
- * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state.
- * @fip: The FCoE controller
- * @state: The new state
- */
-static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state)
-{
- if (state == fip->state)
- return;
- if (fip->lp)
- LIBFCOE_FIP_DBG(fip, "state %s -> %s\n",
- fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state));
- fip->state = state;
-}
-
-/**
- * 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
- */
-static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip)
-{
- if (fip->mode == FIP_MODE_VN2VN)
- hton24(fip->dest_addr, FIP_VN_FC_MAP);
- else
- hton24(fip->dest_addr, FIP_DEF_FC_MAP);
- hton24(fip->dest_addr + 3, 0);
- fip->map_dest = 1;
-}
-
-/**
- * fcoe_ctlr_init() - Initialize the FCoE Controller instance
- * @fip: The FCoE controller to initialize
- */
-void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode)
-{
- fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
- fip->mode = mode;
- INIT_LIST_HEAD(&fip->fcfs);
- mutex_init(&fip->ctlr_mutex);
- spin_lock_init(&fip->ctlr_lock);
- 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);
-
-/**
- * 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.
- */
-void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
-{
- cancel_work_sync(&fip->recv_work);
- skb_queue_purge(&fip->fip_recv_list);
-
- mutex_lock(&fip->ctlr_mutex);
- fcoe_ctlr_set_state(fip, FIP_ST_DISABLED);
- fcoe_ctlr_reset_fcfs(fip);
- mutex_unlock(&fip->ctlr_mutex);
- del_timer_sync(&fip->timer);
- cancel_work_sync(&fip->timer_work);
-}
-EXPORT_SYMBOL(fcoe_ctlr_destroy);
-
-/**
- * fcoe_ctlr_announce() - announce new FCF selection
- * @fip: The FCoE controller
- *
- * Also sets the destination MAC for FCoE and control packets
- *
- * Called with neither ctlr_mutex nor ctlr_lock held.
- */
-static void fcoe_ctlr_announce(struct fcoe_ctlr *fip)
-{
- struct fcoe_fcf *sel;
- struct fcoe_fcf *fcf;
-
- mutex_lock(&fip->ctlr_mutex);
- spin_lock_bh(&fip->ctlr_lock);
-
- kfree_skb(fip->flogi_req);
- fip->flogi_req = NULL;
- list_for_each_entry(fcf, &fip->fcfs, list)
- fcf->flogi_sent = 0;
-
- spin_unlock_bh(&fip->ctlr_lock);
- sel = fip->sel_fcf;
-
- if (sel && !compare_ether_addr(sel->fcf_mac, fip->dest_addr))
- goto unlock;
- if (!is_zero_ether_addr(fip->dest_addr)) {
- printk(KERN_NOTICE "libfcoe: host%d: "
- "FIP Fibre-Channel Forwarder MAC %pM deselected\n",
- fip->lp->host->host_no, fip->dest_addr);
- memset(fip->dest_addr, 0, ETH_ALEN);
- }
- 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->map_dest = 0;
- }
-unlock:
- mutex_unlock(&fip->ctlr_mutex);
-}
-
-/**
- * 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.
- */
-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 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;
-
- 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.
- */
-void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
-{
- mutex_lock(&fip->ctlr_mutex);
- if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) {
- mutex_unlock(&fip->ctlr_mutex);
- fc_linkup(fip->lp);
- } else if (fip->state == FIP_ST_LINK_WAIT) {
- fcoe_ctlr_set_state(fip, 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");
- /* fall-through */
- case FIP_MODE_FABRIC:
- case FIP_MODE_NON_FIP:
- mutex_unlock(&fip->ctlr_mutex);
- fc_linkup(fip->lp);
- fcoe_ctlr_solicit(fip, NULL);
- break;
- case FIP_MODE_VN2VN:
- fcoe_ctlr_vn_start(fip);
- mutex_unlock(&fip->ctlr_mutex);
- fc_linkup(fip->lp);
- break;
- }
- } else
- mutex_unlock(&fip->ctlr_mutex);
-}
-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);
- del_timer(&fip->timer);
- fip->ctlr_ka_time = 0;
- fip->port_ka_time = 0;
- fip->sol_time = 0;
- fip->flogi_oxid = FC_XID_UNKNOWN;
- fcoe_ctlr_map_dest(fip);
-}
-
-/**
- * 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.
- */
-int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
-{
- int link_dropped;
-
- LIBFCOE_FIP_DBG(fip, "link down.\n");
- mutex_lock(&fip->ctlr_mutex);
- fcoe_ctlr_reset(fip);
- link_dropped = fip->state != FIP_ST_LINK_WAIT;
- fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
- mutex_unlock(&fip->ctlr_mutex);
-
- 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 || (ports && !lp->port_id))
- return;
-
- len = sizeof(*kal) + ports * 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->get_src_addr(lport), ETH_ALEN);
- hton24(vn->fd_fc_id, lport->port_id);
- put_unaligned_be64(lport->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
- * @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;
-
- 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);
- hton24(mac->fd_mac + 3, 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).
- * The the skb must also be an fc_frame.
- *
- * This is called from the lower-level driver with spinlocks held,
- * so we must not take a mutex here.
- */
-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)
- fcoe_ctlr_map_dest(fip);
- }
-
- 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;
- if (fip->mode == FIP_MODE_VN2VN)
- break;
- spin_lock_bh(&fip->ctlr_lock);
- kfree_skb(fip->flogi_req);
- fip->flogi_req = skb;
- fip->flogi_req_send = 1;
- spin_unlock_bh(&fip->ctlr_lock);
- schedule_work(&fip->timer_work);
- return -EINPROGRESS;
- 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:
- /*
- * 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 two advertisements.
- * That is, there have been no valid advertisement from it for 2.5
- * times its keep-alive period.
- *
- * 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).
- *
- * Returns the time in jiffies for the next call.
- */
-static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
-{
- struct fcoe_fcf *fcf;
- struct fcoe_fcf *next;
- unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
- unsigned long deadline;
- unsigned long sel_time = 0;
- struct fcoe_dev_stats *stats;
-
- stats = per_cpu_ptr(fip->lp->dev_stats, get_cpu());
-
- list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
- deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2;
- if (fip->sel_fcf == fcf) {
- if (time_after(jiffies, deadline)) {
- 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);
- } else if (time_after(next_timer, deadline))
- next_timer = deadline;
- }
-
- deadline += fcf->fka_period;
- if (time_after_eq(jiffies, deadline)) {
- if (fip->sel_fcf == fcf)
- fip->sel_fcf = NULL;
- list_del(&fcf->list);
- WARN_ON(!fip->fcf_count);
- fip->fcf_count--;
- kfree(fcf);
- stats->VLinkFailureCount++;
- } else {
- if (time_after(next_timer, deadline))
- next_timer = deadline;
- if (fcoe_ctlr_mtu_valid(fcf) &&
- (!sel_time || time_before(sel_time, fcf->time)))
- sel_time = fcf->time;
- }
- }
- put_cpu();
- if (sel_time && !fip->sel_fcf && !fip->sel_time) {
- sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY);
- fip->sel_time = sel_time;
- }
-
- return next_timer;
-}
-
-/**
- * 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;
- u32 desc_mask;
-
- 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);
-
- /*
- * mask of required descriptors. validating each one clears its bit.
- */
- desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
- BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA);
-
- 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;
- /* Drop Adv if there are duplicate critical descriptors */
- if ((desc->fip_dtype < 32) &&
- !(desc_mask & 1U << desc->fip_dtype)) {
- LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
- "Descriptors in FIP adv\n");
- 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;
- desc_mask &= ~BIT(FIP_DT_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;
- }
- desc_mask &= ~BIT(FIP_DT_MAC);
- 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);
- desc_mask &= ~BIT(FIP_DT_NAME);
- 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);
- desc_mask &= ~BIT(FIP_DT_FAB);
- 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);
- desc_mask &= ~BIT(FIP_DT_FKA);
- 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;
- break;
- }
- 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;
- if (desc_mask) {
- LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n",
- desc_mask);
- 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;
- 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(fip, skb, &new))
- return;
-
- mutex_lock(&fip->ctlr_mutex);
- 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 {
- /*
- * Update the FCF's keep-alive descriptor flags.
- * Other flag changes from new advertisements are
- * ignored after a solicited advertisement is
- * received and the FCF is selectable (usable).
- */
- 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 fab %16.16llx mac %pM\n",
- fcf->fabric_name, fcf->fcf_mac);
-
- /*
- * 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_del(&fcf->list);
- list_add(&fcf->list, &fip->fcfs);
- }
-
- /*
- * If this is the first validated FCF, note the time and
- * set a timer to trigger selection.
- */
- if (mtu_valid && !fip->sel_fcf && 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:
- mutex_unlock(&fip->ctlr_mutex);
-}
-
-/**
- * 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;
- u32 desc_mask = 0;
- u32 desc_cnt = 0;
-
- 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) {
- desc_cnt++;
- dlen = desc->fip_dlen * FIP_BPW;
- if (dlen < sizeof(*desc) || dlen > rlen)
- goto drop;
- /* Drop ELS if there are duplicate critical descriptors */
- if (desc->fip_dtype < 32) {
- if (desc_mask & 1U << desc->fip_dtype) {
- LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
- "Descriptors in FIP ELS\n");
- goto drop;
- }
- desc_mask |= (1 << desc->fip_dtype);
- }
- switch (desc->fip_dtype) {
- case FIP_DT_MAC:
- if (desc_cnt == 1) {
- LIBFCOE_FIP_DBG(fip, "FIP descriptors "
- "received out of order\n");
- goto drop;
- }
-
- if (dlen != sizeof(struct fip_mac_desc))
- goto len_err;
- memcpy(granted_mac,
- ((struct fip_mac_desc *)desc)->fd_mac,
- ETH_ALEN);
- break;
- case FIP_DT_FLOGI:
- case FIP_DT_FDISC:
- case FIP_DT_LOGO:
- case FIP_DT_ELP:
- if (desc_cnt != 1) {
- LIBFCOE_FIP_DBG(fip, "FIP descriptors "
- "received out of order\n");
- goto drop;
- }
- 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;
- if (desc_cnt <= 2) {
- LIBFCOE_FIP_DBG(fip, "FIP descriptors "
- "received out of order\n");
- goto drop;
- }
- break;
- }
- desc = (struct fip_desc *)((char *)desc + dlen);
- rlen -= dlen;
- }
-
- if (!fh)
- goto drop;
- els_op = *(u8 *)(fh + 1);
-
- if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) &&
- sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) {
- if (els_op == ELS_LS_ACC) {
- 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;
- if (els_dtype == FIP_DT_FLOGI)
- fcoe_ctlr_announce(fip);
- }
- } else if (els_dtype == FIP_DT_FLOGI &&
- !fcoe_ctlr_flogi_retry(fip))
- goto drop; /* retrying FLOGI so drop reject */
- }
-
- if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) &&
- (!(1U << FIP_DT_MAC & desc_mask)))) {
- LIBFCOE_FIP_DBG(fip, "Missing critical descriptors "
- "in FIP ELS\n");
- goto drop;
- }
-
- /*
- * 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;
-
- stats = per_cpu_ptr(lport->dev_stats, get_cpu());
- 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;
- struct fc_lport *vn_port = NULL;
- u32 desc_mask;
- int is_vn_port = 0;
-
- LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
-
- if (!fcf || !lport->port_id)
- 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;
- /* Drop CVL if there are duplicate critical descriptors */
- if ((desc->fip_dtype < 32) &&
- !(desc_mask & 1U << desc->fip_dtype)) {
- LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
- "Descriptors in FIP CVL\n");
- 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) == lport->port_id) {
- desc_mask &= ~BIT(FIP_DT_VN_ID);
- break;
- }
- /* check if clr_vlink is for NPIV port */
- mutex_lock(&lport->lp_mutex);
- list_for_each_entry(vn_port, &lport->vports, list) {
- if (compare_ether_addr(vp->fd_mac,
- fip->get_src_addr(vn_port)) == 0 &&
- (get_unaligned_be64(&vp->fd_wwpn)
- == vn_port->wwpn) &&
- (ntoh24(vp->fd_fc_id) ==
- fc_host_port_id(vn_port->host))) {
- desc_mask &= ~BIT(FIP_DT_VN_ID);
- is_vn_port = 1;
- break;
- }
- }
- mutex_unlock(&lport->lp_mutex);
-
- 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 (is_vn_port)
- fc_lport_reset(vn_port);
- else {
- mutex_lock(&fip->ctlr_mutex);
- per_cpu_ptr(lport->dev_stats,
- get_cpu())->VLinkFailureCount++;
- put_cpu();
- fcoe_ctlr_reset(fip);
- mutex_unlock(&fip->ctlr_mutex);
-
- fc_lport_reset(fip->lp);
- fcoe_ctlr_solicit(fip, NULL);
- }
- }
-}
-
-/**
- * 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.
- */
-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;
-
- mutex_lock(&fip->ctlr_mutex);
- state = fip->state;
- if (state == FIP_ST_AUTO) {
- fip->map_dest = 0;
- fcoe_ctlr_set_state(fip, FIP_ST_ENABLED);
- state = FIP_ST_ENABLED;
- LIBFCOE_FIP_DBG(fip, "Using FIP mode\n");
- }
- mutex_unlock(&fip->ctlr_mutex);
-
- 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);
- kfree_skb(skb);
- return 0;
-drop:
- kfree_skb(skb);
- return -1;
-}
-
-/**
- * fcoe_ctlr_select() - Select the best FCF (if possible)
- * @fip: The FCoE controller
- *
- * Returns the selected FCF, or NULL if none are usable.
- *
- * If there are conflicting advertisements, no FCF can be chosen.
- *
- * If there is already a selected FCF, this will choose a better one or
- * an equivalent one that hasn't already been sent a FLOGI.
- *
- * Called with lock held.
- */
-static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip)
-{
- struct fcoe_fcf *fcf;
- struct fcoe_fcf *best = fip->sel_fcf;
- struct fcoe_fcf *first;
-
- first = list_first_entry(&fip->fcfs, struct fcoe_fcf, list);
-
- list_for_each_entry(fcf, &fip->fcfs, list) {
- LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx "
- "VFID %d mac %pM map %x val %d "
- "sent %u pri %u\n",
- fcf->fabric_name, fcf->vfid, fcf->fcf_mac,
- fcf->fc_map, fcoe_ctlr_mtu_valid(fcf),
- fcf->flogi_sent, fcf->pri);
- if (fcf->fabric_name != first->fabric_name ||
- fcf->vfid != first->vfid ||
- fcf->fc_map != first->fc_map) {
- LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, "
- "or FC-MAP\n");
- return NULL;
- }
- if (fcf->flogi_sent)
- continue;
- 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 || fcf->pri < best->pri || best->flogi_sent)
- best = fcf;
- }
- fip->sel_fcf = best;
- if (best) {
- LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac);
- fip->port_ka_time = jiffies +
- msecs_to_jiffies(FIP_VN_KA_PERIOD);
- fip->ctlr_ka_time = jiffies + best->fka_period;
- if (time_before(fip->ctlr_ka_time, fip->timer.expires))
- mod_timer(&fip->timer, fip->ctlr_ka_time);
- }
- return best;
-}
-
-/**
- * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF
- * @fip: The FCoE controller
- *
- * Returns non-zero error if it could not be sent.
- *
- * Called with ctlr_mutex and ctlr_lock held.
- * Caller must verify that fip->sel_fcf is not NULL.
- */
-static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip)
-{
- struct sk_buff *skb;
- struct sk_buff *skb_orig;
- struct fc_frame_header *fh;
- int error;
-
- skb_orig = fip->flogi_req;
- if (!skb_orig)
- return -EINVAL;
-
- /*
- * Clone and send the FLOGI request. If clone fails, use original.
- */
- skb = skb_clone(skb_orig, GFP_ATOMIC);
- if (!skb) {
- skb = skb_orig;
- fip->flogi_req = NULL;
- }
- fh = (struct fc_frame_header *)skb->data;
- error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb,
- ntoh24(fh->fh_d_id));
- if (error) {
- kfree_skb(skb);
- return error;
- }
- fip->send(fip, skb);
- fip->sel_fcf->flogi_sent = 1;
- return 0;
-}
-
-/**
- * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible
- * @fip: The FCoE controller
- *
- * Returns non-zero error code if there's no FLOGI request to retry or
- * no alternate FCF available.
- */
-static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip)
-{
- struct fcoe_fcf *fcf;
- int error;
-
- mutex_lock(&fip->ctlr_mutex);
- spin_lock_bh(&fip->ctlr_lock);
- LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n");
- fcf = fcoe_ctlr_select(fip);
- if (!fcf || fcf->flogi_sent) {
- kfree_skb(fip->flogi_req);
- fip->flogi_req = NULL;
- error = -ENOENT;
- } else {
- fcoe_ctlr_solicit(fip, NULL);
- error = fcoe_ctlr_flogi_send_locked(fip);
- }
- spin_unlock_bh(&fip->ctlr_lock);
- mutex_unlock(&fip->ctlr_mutex);
- return error;
-}
-
-
-/**
- * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI.
- * @fip: The FCoE controller that timed out
- *
- * Done here because fcoe_ctlr_els_send() can't get mutex.
- *
- * Called with ctlr_mutex held. The caller must not hold ctlr_lock.
- */
-static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip)
-{
- struct fcoe_fcf *fcf;
-
- spin_lock_bh(&fip->ctlr_lock);
- fcf = fip->sel_fcf;
- if (!fcf || !fip->flogi_req_send)
- goto unlock;
-
- LIBFCOE_FIP_DBG(fip, "sending FLOGI\n");
-
- /*
- * If this FLOGI is being sent due to a timeout retry
- * to the same FCF as before, select a different FCF if possible.
- */
- if (fcf->flogi_sent) {
- LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n");
- fcf = fcoe_ctlr_select(fip);
- if (!fcf || fcf->flogi_sent) {
- LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n");
- list_for_each_entry(fcf, &fip->fcfs, list)
- fcf->flogi_sent = 0;
- fcf = fcoe_ctlr_select(fip);
- }
- }
- if (fcf) {
- fcoe_ctlr_flogi_send_locked(fip);
- fip->flogi_req_send = 0;
- } else /* XXX */
- LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n");
-unlock:
- spin_unlock_bh(&fip->ctlr_lock);
-}
-
-/**
- * fcoe_ctlr_timeout() - FIP timeout handler
- * @arg: The FCoE controller that timed out
- */
-static void fcoe_ctlr_timeout(unsigned long arg)
-{
- struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg;
-
- schedule_work(&fip->timer_work);
-}
-
-/**
- * fcoe_ctlr_timer_work() - Worker thread function for timer work
- * @work: Handle to a FCoE controller
- *
- * Ages FCFs. Triggers FCF selection if possible.
- * Sends keep-alives and resets.
- */
-static void fcoe_ctlr_timer_work(struct work_struct *work)
-{
- struct fcoe_ctlr *fip;
- struct fc_lport *vport;
- u8 *mac;
- u8 reset = 0;
- u8 send_ctlr_ka = 0;
- u8 send_port_ka = 0;
- struct fcoe_fcf *sel;
- struct fcoe_fcf *fcf;
- unsigned long next_timer;
-
- fip = container_of(work, struct fcoe_ctlr, timer_work);
- if (fip->mode == FIP_MODE_VN2VN)
- return fcoe_ctlr_vn_timeout(fip);
- mutex_lock(&fip->ctlr_mutex);
- if (fip->state == FIP_ST_DISABLED) {
- mutex_unlock(&fip->ctlr_mutex);
- return;
- }
-
- fcf = fip->sel_fcf;
- next_timer = fcoe_ctlr_age_fcfs(fip);
-
- sel = fip->sel_fcf;
- if (!sel && fip->sel_time) {
- if (time_after_eq(jiffies, fip->sel_time)) {
- sel = fcoe_ctlr_select(fip);
- fip->sel_time = 0;
- } else if (time_after(next_timer, fip->sel_time))
- next_timer = fip->sel_time;
- }
-
- if (sel && fip->flogi_req_send)
- fcoe_ctlr_flogi_send(fip);
- else if (!sel && fcf)
- reset = 1;
-
- if (sel && !sel->fd_flags) {
- 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;
- }
- if (!list_empty(&fip->fcfs))
- mod_timer(&fip->timer, next_timer);
- mutex_unlock(&fip->ctlr_mutex);
-
- if (reset) {
- fc_lport_reset(fip->lp);
- /* restart things with a solicitation */
- fcoe_ctlr_solicit(fip, NULL);
- }
-
- if (send_ctlr_ka)
- fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
-
- if (send_port_ka) {
- 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
- * @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.
- */
-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)) {
-
- mutex_lock(&fip->ctlr_mutex);
- if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
- mutex_unlock(&fip->ctlr_mutex);
- return -EINVAL;
- }
- fcoe_ctlr_set_state(fip, 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;
- mutex_unlock(&fip->ctlr_mutex);
- 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.
- */
- mutex_lock(&fip->ctlr_mutex);
- 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");
- fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
- }
- mutex_unlock(&fip->ctlr_mutex);
- }
- 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
- */
-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_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv
- * @rdata: libfc remote port
- */
-static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata)
-{
- return (struct fcoe_rport *)(rdata + 1);
-}
-
-/**
- * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply.
- * @fip: The FCoE controller
- * @sub: sub-opcode for probe request, reply, or advertisement.
- * @dest: The destination Ethernet MAC address
- * @min_len: minimum size of the Ethernet payload to be sent
- */
-static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip,
- enum fip_vn2vn_subcode sub,
- const u8 *dest, size_t min_len)
-{
- struct sk_buff *skb;
- struct fip_frame {
- struct ethhdr eth;
- struct fip_header fip;
- struct fip_mac_desc mac;
- struct fip_wwn_desc wwnn;
- struct fip_vn_desc vn;
- } __attribute__((packed)) *frame;
- struct fip_fc4_feat *ff;
- struct fip_size_desc *size;
- u32 fcp_feat;
- size_t len;
- size_t dlen;
-
- len = sizeof(*frame);
- dlen = 0;
- if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
- dlen = sizeof(struct fip_fc4_feat) +
- sizeof(struct fip_size_desc);
- len += dlen;
- }
- dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn);
- len = max(len, min_len + sizeof(struct ethhdr));
-
- skb = dev_alloc_skb(len);
- if (!skb)
- return;
-
- frame = (struct fip_frame *)skb->data;
- memset(frame, 0, len);
- memcpy(frame->eth.h_dest, dest, ETH_ALEN);
- memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
- frame->eth.h_proto = htons(ETH_P_FIP);
-
- frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
- frame->fip.fip_op = htons(FIP_OP_VN2VN);
- frame->fip.fip_subcode = sub;
- frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
-
- frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
- frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
- memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
-
- frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
- frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW;
- put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn);
-
- frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID;
- frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW;
- hton24(frame->vn.fd_mac, FIP_VN_FC_MAP);
- hton24(frame->vn.fd_mac + 3, fip->port_id);
- hton24(frame->vn.fd_fc_id, fip->port_id);
- put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn);
-
- /*
- * For claims, add FC-4 features.
- * TBD: Add interface to get fc-4 types and features from libfc.
- */
- if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
- ff = (struct fip_fc4_feat *)(frame + 1);
- ff->fd_desc.fip_dtype = FIP_DT_FC4F;
- ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW;
- ff->fd_fts = fip->lp->fcts;
-
- fcp_feat = 0;
- if (fip->lp->service_params & FCP_SPPF_INIT_FCN)
- fcp_feat |= FCP_FEAT_INIT;
- if (fip->lp->service_params & FCP_SPPF_TARG_FCN)
- fcp_feat |= FCP_FEAT_TARG;
- fcp_feat <<= (FC_TYPE_FCP * 4) % 32;
- ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat);
-
- size = (struct fip_size_desc *)(ff + 1);
- size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
- size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW;
- size->fd_size = htons(fcoe_ctlr_fcoe_size(fip));
- }
-
- 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_vn_rport_callback - Event handler for rport events.
- * @lport: The lport which is receiving the event
- * @rdata: remote port private data
- * @event: The event that occured
- *
- * Locking Note: The rport lock must not be held when calling this function.
- */
-static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport,
- struct fc_rport_priv *rdata,
- enum fc_rport_event event)
-{
- struct fcoe_ctlr *fip = lport->disc.priv;
- struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
-
- LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n",
- rdata->ids.port_id, event);
-
- mutex_lock(&fip->ctlr_mutex);
- switch (event) {
- case RPORT_EV_READY:
- frport->login_count = 0;
- break;
- case RPORT_EV_LOGO:
- case RPORT_EV_FAILED:
- case RPORT_EV_STOP:
- frport->login_count++;
- if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) {
- LIBFCOE_FIP_DBG(fip,
- "rport FLOGI limited port_id %6.6x\n",
- rdata->ids.port_id);
- lport->tt.rport_logoff(rdata);
- }
- break;
- default:
- break;
- }
- mutex_unlock(&fip->ctlr_mutex);
-}
-
-static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = {
- .event_callback = fcoe_ctlr_vn_rport_callback,
-};
-
-/**
- * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode
- * @fip: The FCoE controller
- *
- * Called with ctlr_mutex held.
- */
-static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport)
-{
- mutex_lock(&lport->disc.disc_mutex);
- lport->disc.disc_callback = NULL;
- mutex_unlock(&lport->disc.disc_mutex);
-}
-
-/**
- * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode
- * @fip: The FCoE controller
- *
- * Called through the local port template for discovery.
- * Called without the ctlr_mutex held.
- */
-static void fcoe_ctlr_disc_stop(struct fc_lport *lport)
-{
- struct fcoe_ctlr *fip = lport->disc.priv;
-
- mutex_lock(&fip->ctlr_mutex);
- fcoe_ctlr_disc_stop_locked(lport);
- mutex_unlock(&fip->ctlr_mutex);
-}
-
-/**
- * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode
- * @fip: The FCoE controller
- *
- * Called through the local port template for discovery.
- * Called without the ctlr_mutex held.
- */
-static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport)
-{
- fcoe_ctlr_disc_stop(lport);
- lport->tt.rport_flush_queue();
- synchronize_rcu();
-}
-
-/**
- * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id
- * @fip: The FCoE controller
- *
- * Called with fcoe_ctlr lock held.
- */
-static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
-{
- unsigned long wait;
- u32 port_id;
-
- fcoe_ctlr_disc_stop_locked(fip->lp);
-
- /*
- * Get proposed port ID.
- * If this is the first try after link up, use any previous port_id.
- * If there was none, use the low bits of the port_name.
- * On subsequent tries, get the next random one.
- * Don't use reserved IDs, use another non-zero value, just as random.
- */
- port_id = fip->port_id;
- if (fip->probe_tries)
- port_id = prandom32(&fip->rnd_state) & 0xffff;
- else if (!port_id)
- port_id = fip->lp->wwpn & 0xffff;
- if (!port_id || port_id == 0xffff)
- port_id = 1;
- fip->port_id = port_id;
-
- if (fip->probe_tries < FIP_VN_RLIM_COUNT) {
- fip->probe_tries++;
- wait = random32() % FIP_VN_PROBE_WAIT;
- } else
- wait = FIP_VN_RLIM_INT;
- mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait));
- fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START);
-}
-
-/**
- * fcoe_ctlr_vn_start() - Start in VN2VN mode
- * @fip: The FCoE controller
- *
- * Called with fcoe_ctlr lock held.
- */
-static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip)
-{
- fip->probe_tries = 0;
- prandom32_seed(&fip->rnd_state, fip->lp->wwpn);
- fcoe_ctlr_vn_restart(fip);
-}
-
-/**
- * fcoe_ctlr_vn_parse - parse probe request or response
- * @fip: The FCoE controller
- * @skb: incoming packet
- * @rdata: buffer for resulting parsed VN entry plus fcoe_rport
- *
- * Returns non-zero error number on error.
- * Does not consume the packet.
- */
-static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip,
- struct sk_buff *skb,
- struct fc_rport_priv *rdata)
-{
- struct fip_header *fiph;
- struct fip_desc *desc = NULL;
- struct fip_mac_desc *macd = NULL;
- struct fip_wwn_desc *wwn = NULL;
- struct fip_vn_desc *vn = NULL;
- struct fip_size_desc *size = NULL;
- struct fcoe_rport *frport;
- size_t rlen;
- size_t dlen;
- u32 desc_mask = 0;
- u32 dtype;
- u8 sub;
-
- memset(rdata, 0, sizeof(*rdata) + sizeof(*frport));
- frport = fcoe_ctlr_rport(rdata);
-
- fiph = (struct fip_header *)skb->data;
- frport->flags = ntohs(fiph->fip_flags);
-
- sub = fiph->fip_subcode;
- switch (sub) {
- case FIP_SC_VN_PROBE_REQ:
- case FIP_SC_VN_PROBE_REP:
- case FIP_SC_VN_BEACON:
- desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
- BIT(FIP_DT_VN_ID);
- break;
- case FIP_SC_VN_CLAIM_NOTIFY:
- case FIP_SC_VN_CLAIM_REP:
- desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
- BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) |
- BIT(FIP_DT_FCOE_SIZE);
- break;
- default:
- LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
- return -EINVAL;
- }
-
- 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;
-
- dtype = desc->fip_dtype;
- if (dtype < 32) {
- if (!(desc_mask & BIT(dtype))) {
- LIBFCOE_FIP_DBG(fip,
- "unexpected or duplicated desc "
- "desc type %u in "
- "FIP VN2VN subtype %u\n",
- dtype, sub);
- return -EINVAL;
- }
- desc_mask &= ~BIT(dtype);
- }
-
- switch (dtype) {
- case FIP_DT_MAC:
- if (dlen != sizeof(struct fip_mac_desc))
- goto len_err;
- macd = (struct fip_mac_desc *)desc;
- if (!is_valid_ether_addr(macd->fd_mac)) {
- LIBFCOE_FIP_DBG(fip,
- "Invalid MAC addr %pM in FIP VN2VN\n",
- macd->fd_mac);
- return -EINVAL;
- }
- memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
- break;
- case FIP_DT_NAME:
- if (dlen != sizeof(struct fip_wwn_desc))
- goto len_err;
- wwn = (struct fip_wwn_desc *)desc;
- rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn);
- break;
- case FIP_DT_VN_ID:
- if (dlen != sizeof(struct fip_vn_desc))
- goto len_err;
- vn = (struct fip_vn_desc *)desc;
- memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN);
- rdata->ids.port_id = ntoh24(vn->fd_fc_id);
- rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn);
- break;
- case FIP_DT_FC4F:
- if (dlen != sizeof(struct fip_fc4_feat))
- goto len_err;
- break;
- case FIP_DT_FCOE_SIZE:
- if (dlen != sizeof(struct fip_size_desc))
- goto len_err;
- size = (struct fip_size_desc *)desc;
- frport->fcoe_len = ntohs(size->fd_size);
- break;
- default:
- LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
- "in FIP probe\n", dtype);
- /* standard says ignore unknown descriptors >= 128 */
- if (dtype < FIP_DT_VENDOR_BASE)
- return -EINVAL;
- break;
- }
- desc = (struct fip_desc *)((char *)desc + dlen);
- rlen -= dlen;
- }
- return 0;
-
-len_err:
- LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
- dtype, dlen);
- return -EINVAL;
-}
-
-/**
- * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification.
- * @fip: The FCoE controller
- *
- * Called with ctlr_mutex held.
- */
-static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip)
-{
- fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0);
- fip->sol_time = jiffies;
-}
-
-/**
- * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request.
- * @fip: The FCoE controller
- * @rdata: parsed remote port with frport from the probe request
- *
- * Called with ctlr_mutex held.
- */
-static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip,
- struct fc_rport_priv *rdata)
-{
- struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
-
- if (rdata->ids.port_id != fip->port_id)
- return;
-
- switch (fip->state) {
- case FIP_ST_VNMP_CLAIM:
- case FIP_ST_VNMP_UP:
- fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
- frport->enode_mac, 0);
- break;
- case FIP_ST_VNMP_PROBE1:
- case FIP_ST_VNMP_PROBE2:
- /*
- * Decide whether to reply to the Probe.
- * Our selected address is never a "recorded" one, so
- * only reply if our WWPN is greater and the
- * Probe's REC bit is not set.
- * If we don't reply, we will change our address.
- */
- if (fip->lp->wwpn > rdata->ids.port_name &&
- !(frport->flags & FIP_FL_REC_OR_P2P)) {
- fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
- frport->enode_mac, 0);
- break;
- }
- /* fall through */
- case FIP_ST_VNMP_START:
- fcoe_ctlr_vn_restart(fip);
- break;
- default:
- break;
- }
-}
-
-/**
- * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply.
- * @fip: The FCoE controller
- * @rdata: parsed remote port with frport from the probe request
- *
- * Called with ctlr_mutex held.
- */
-static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip,
- struct fc_rport_priv *rdata)
-{
- if (rdata->ids.port_id != fip->port_id)
- return;
- switch (fip->state) {
- case FIP_ST_VNMP_START:
- case FIP_ST_VNMP_PROBE1:
- case FIP_ST_VNMP_PROBE2:
- case FIP_ST_VNMP_CLAIM:
- fcoe_ctlr_vn_restart(fip);
- break;
- case FIP_ST_VNMP_UP:
- fcoe_ctlr_vn_send_claim(fip);
- break;
- default:
- break;
- }
-}
-
-/**
- * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply.
- * @fip: The FCoE controller
- * @new: newly-parsed remote port with frport as a template for new rdata
- *
- * Called with ctlr_mutex held.
- */
-static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new)
-{
- struct fc_lport *lport = fip->lp;
- struct fc_rport_priv *rdata;
- struct fc_rport_identifiers *ids;
- struct fcoe_rport *frport;
- u32 port_id;
-
- port_id = new->ids.port_id;
- if (port_id == fip->port_id)
- return;
-
- mutex_lock(&lport->disc.disc_mutex);
- rdata = lport->tt.rport_create(lport, port_id);
- if (!rdata) {
- mutex_unlock(&lport->disc.disc_mutex);
- return;
- }
-
- rdata->ops = &fcoe_ctlr_vn_rport_ops;
- rdata->disc_id = lport->disc.disc_id;
-
- ids = &rdata->ids;
- if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) ||
- (ids->node_name != -1 && ids->node_name != new->ids.node_name))
- lport->tt.rport_logoff(rdata);
- ids->port_name = new->ids.port_name;
- ids->node_name = new->ids.node_name;
- mutex_unlock(&lport->disc.disc_mutex);
-
- frport = fcoe_ctlr_rport(rdata);
- LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n",
- port_id, frport->fcoe_len ? "old" : "new");
- *frport = *fcoe_ctlr_rport(new);
- frport->time = 0;
-}
-
-/**
- * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address
- * @fip: The FCoE controller
- * @port_id: The port_id of the remote VN_node
- * @mac: buffer which will hold the VN_NODE destination MAC address, if found.
- *
- * Returns non-zero error if no remote port found.
- */
-static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac)
-{
- struct fc_lport *lport = fip->lp;
- struct fc_rport_priv *rdata;
- struct fcoe_rport *frport;
- int ret = -1;
-
- rcu_read_lock();
- rdata = lport->tt.rport_lookup(lport, port_id);
- if (rdata) {
- frport = fcoe_ctlr_rport(rdata);
- memcpy(mac, frport->enode_mac, ETH_ALEN);
- ret = 0;
- }
- rcu_read_unlock();
- return ret;
-}
-
-/**
- * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification
- * @fip: The FCoE controller
- * @new: newly-parsed remote port with frport as a template for new rdata
- *
- * Called with ctlr_mutex held.
- */
-static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip,
- struct fc_rport_priv *new)
-{
- struct fcoe_rport *frport = fcoe_ctlr_rport(new);
-
- if (frport->flags & FIP_FL_REC_OR_P2P) {
- fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
- return;
- }
- switch (fip->state) {
- case FIP_ST_VNMP_START:
- case FIP_ST_VNMP_PROBE1:
- case FIP_ST_VNMP_PROBE2:
- if (new->ids.port_id == fip->port_id)
- fcoe_ctlr_vn_restart(fip);
- break;
- case FIP_ST_VNMP_CLAIM:
- case FIP_ST_VNMP_UP:
- if (new->ids.port_id == fip->port_id) {
- if (new->ids.port_name > fip->lp->wwpn) {
- fcoe_ctlr_vn_restart(fip);
- break;
- }
- fcoe_ctlr_vn_send_claim(fip);
- break;
- }
- fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac,
- min((u32)frport->fcoe_len,
- fcoe_ctlr_fcoe_size(fip)));
- fcoe_ctlr_vn_add(fip, new);
- break;
- default:
- break;
- }
-}
-
-/**
- * fcoe_ctlr_vn_claim_resp() - handle received Claim Response
- * @fip: The FCoE controller that received the frame
- * @new: newly-parsed remote port with frport from the Claim Response
- *
- * Called with ctlr_mutex held.
- */
-static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip,
- struct fc_rport_priv *new)
-{
- LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n",
- new->ids.port_id, fcoe_ctlr_state(fip->state));
- if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM)
- fcoe_ctlr_vn_add(fip, new);
-}
-
-/**
- * fcoe_ctlr_vn_beacon() - handle received beacon.
- * @fip: The FCoE controller that received the frame
- * @new: newly-parsed remote port with frport from the Beacon
- *
- * Called with ctlr_mutex held.
- */
-static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip,
- struct fc_rport_priv *new)
-{
- struct fc_lport *lport = fip->lp;
- struct fc_rport_priv *rdata;
- struct fcoe_rport *frport;
-
- frport = fcoe_ctlr_rport(new);
- if (frport->flags & FIP_FL_REC_OR_P2P) {
- fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
- return;
- }
- mutex_lock(&lport->disc.disc_mutex);
- rdata = lport->tt.rport_lookup(lport, new->ids.port_id);
- if (rdata)
- kref_get(&rdata->kref);
- mutex_unlock(&lport->disc.disc_mutex);
- if (rdata) {
- if (rdata->ids.node_name == new->ids.node_name &&
- rdata->ids.port_name == new->ids.port_name) {
- frport = fcoe_ctlr_rport(rdata);
- if (!frport->time && fip->state == FIP_ST_VNMP_UP)
- lport->tt.rport_login(rdata);
- frport->time = jiffies;
- }
- kref_put(&rdata->kref, lport->tt.rport_destroy);
- return;
- }
- if (fip->state != FIP_ST_VNMP_UP)
- return;
-
- /*
- * Beacon from a new neighbor.
- * Send a claim notify if one hasn't been sent recently.
- * Don't add the neighbor yet.
- */
- LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n",
- new->ids.port_id);
- if (time_after(jiffies,
- fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT)))
- fcoe_ctlr_vn_send_claim(fip);
-}
-
-/**
- * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons
- * @fip: The FCoE controller
- *
- * Called with ctlr_mutex held.
- * Called only in state FIP_ST_VNMP_UP.
- * Returns the soonest time for next age-out or a time far in the future.
- */
-static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip)
-{
- struct fc_lport *lport = fip->lp;
- struct fc_rport_priv *rdata;
- struct fcoe_rport *frport;
- unsigned long next_time;
- unsigned long deadline;
-
- next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10);
- mutex_lock(&lport->disc.disc_mutex);
- list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
- frport = fcoe_ctlr_rport(rdata);
- if (!frport->time)
- continue;
- deadline = frport->time +
- msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10);
- if (time_after_eq(jiffies, deadline)) {
- frport->time = 0;
- LIBFCOE_FIP_DBG(fip,
- "port %16.16llx fc_id %6.6x beacon expired\n",
- rdata->ids.port_name, rdata->ids.port_id);
- lport->tt.rport_logoff(rdata);
- } else if (time_before(deadline, next_time))
- next_time = deadline;
- }
- mutex_unlock(&lport->disc.disc_mutex);
- return next_time;
-}
-
-/**
- * fcoe_ctlr_vn_recv() - 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.
- * Always consumes the frame.
- */
-static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
-{
- struct fip_header *fiph;
- enum fip_vn2vn_subcode sub;
- struct {
- struct fc_rport_priv rdata;
- struct fcoe_rport frport;
- } buf;
- int rc;
-
- fiph = (struct fip_header *)skb->data;
- sub = fiph->fip_subcode;
-
- rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata);
- if (rc) {
- LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc);
- goto drop;
- }
-
- mutex_lock(&fip->ctlr_mutex);
- switch (sub) {
- case FIP_SC_VN_PROBE_REQ:
- fcoe_ctlr_vn_probe_req(fip, &buf.rdata);
- break;
- case FIP_SC_VN_PROBE_REP:
- fcoe_ctlr_vn_probe_reply(fip, &buf.rdata);
- break;
- case FIP_SC_VN_CLAIM_NOTIFY:
- fcoe_ctlr_vn_claim_notify(fip, &buf.rdata);
- break;
- case FIP_SC_VN_CLAIM_REP:
- fcoe_ctlr_vn_claim_resp(fip, &buf.rdata);
- break;
- case FIP_SC_VN_BEACON:
- fcoe_ctlr_vn_beacon(fip, &buf.rdata);
- break;
- default:
- LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub);
- rc = -1;
- break;
- }
- mutex_unlock(&fip->ctlr_mutex);
-drop:
- kfree_skb(skb);
- return rc;
-}
-
-/**
- * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode.
- * @lport: The local port
- * @fp: The received frame
- *
- * This should never be called since we don't see RSCNs or other
- * fabric-generated ELSes.
- */
-static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp)
-{
- struct fc_seq_els_data rjt_data;
-
- rjt_data.reason = ELS_RJT_UNSUP;
- rjt_data.explan = ELS_EXPL_NONE;
- lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
- fc_frame_free(fp);
-}
-
-/**
- * fcoe_ctlr_disc_recv - start discovery for VN2VN mode.
- * @fip: The FCoE controller
- *
- * This sets a flag indicating that remote ports should be created
- * and started for the peers we discover. We use the disc_callback
- * pointer as that flag. Peers already discovered are created here.
- *
- * The lport lock is held during this call. The callback must be done
- * later, without holding either the lport or discovery locks.
- * The fcoe_ctlr lock may also be held during this call.
- */
-static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *,
- enum fc_disc_event),
- struct fc_lport *lport)
-{
- struct fc_disc *disc = &lport->disc;
- struct fcoe_ctlr *fip = disc->priv;
-
- mutex_lock(&disc->disc_mutex);
- disc->disc_callback = callback;
- disc->disc_id = (disc->disc_id + 2) | 1;
- disc->pending = 1;
- schedule_work(&fip->timer_work);
- mutex_unlock(&disc->disc_mutex);
-}
-
-/**
- * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state.
- * @fip: The FCoE controller
- *
- * Starts the FLOGI and PLOGI login process to each discovered rport for which
- * we've received at least one beacon.
- * Performs the discovery complete callback.
- */
-static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip)
-{
- struct fc_lport *lport = fip->lp;
- struct fc_disc *disc = &lport->disc;
- struct fc_rport_priv *rdata;
- struct fcoe_rport *frport;
- void (*callback)(struct fc_lport *, enum fc_disc_event);
-
- mutex_lock(&disc->disc_mutex);
- callback = disc->pending ? disc->disc_callback : NULL;
- disc->pending = 0;
- list_for_each_entry_rcu(rdata, &disc->rports, peers) {
- frport = fcoe_ctlr_rport(rdata);
- if (frport->time)
- lport->tt.rport_login(rdata);
- }
- mutex_unlock(&disc->disc_mutex);
- if (callback)
- callback(lport, DISC_EV_SUCCESS);
-}
-
-/**
- * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode.
- * @fip: The FCoE controller
- */
-static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
-{
- unsigned long next_time;
- u8 mac[ETH_ALEN];
- u32 new_port_id = 0;
-
- mutex_lock(&fip->ctlr_mutex);
- switch (fip->state) {
- case FIP_ST_VNMP_START:
- fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1);
- fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
- next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT);
- break;
- case FIP_ST_VNMP_PROBE1:
- fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2);
- fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
- next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
- break;
- case FIP_ST_VNMP_PROBE2:
- fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM);
- new_port_id = fip->port_id;
- hton24(mac, FIP_VN_FC_MAP);
- hton24(mac + 3, new_port_id);
- fcoe_ctlr_map_dest(fip);
- fip->update_mac(fip->lp, mac);
- fcoe_ctlr_vn_send_claim(fip);
- next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
- break;
- case FIP_ST_VNMP_CLAIM:
- /*
- * This may be invoked either by starting discovery so don't
- * go to the next state unless it's been long enough.
- */
- next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT);
- if (time_after_eq(jiffies, next_time)) {
- fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP);
- fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
- fcoe_all_vn2vn, 0);
- next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
- fip->port_ka_time = next_time;
- }
- fcoe_ctlr_vn_disc(fip);
- break;
- case FIP_ST_VNMP_UP:
- next_time = fcoe_ctlr_vn_age(fip);
- if (time_after_eq(jiffies, fip->port_ka_time)) {
- fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
- fcoe_all_vn2vn, 0);
- fip->port_ka_time = jiffies +
- msecs_to_jiffies(FIP_VN_BEACON_INT +
- (random32() % FIP_VN_BEACON_FUZZ));
- }
- if (time_before(fip->port_ka_time, next_time))
- next_time = fip->port_ka_time;
- break;
- case FIP_ST_LINK_WAIT:
- goto unlock;
- default:
- WARN(1, "unexpected state %d\n", fip->state);
- goto unlock;
- }
- mod_timer(&fip->timer, next_time);
-unlock:
- mutex_unlock(&fip->ctlr_mutex);
-
- /* If port ID is new, notify local port after dropping ctlr_mutex */
- if (new_port_id)
- fc_lport_set_local_id(fip->lp, new_port_id);
-}
-
-/**
- * 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
- * @init_fcp: If non-zero, the FCP portion of libfc should be initialized
- *
- * Returns : 0 for success
- */
-int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip,
- const struct libfc_function_template *tt, int init_fcp)
-{
- /* Set the function pointers set by the LLDD */
- memcpy(&lport->tt, tt, sizeof(*tt));
- if (init_fcp && fc_fcp_init(lport))
- return -ENOMEM;
- fc_exch_init(lport);
- fc_elsct_init(lport);
- fc_lport_init(lport);
- if (fip->mode == FIP_MODE_VN2VN)
- lport->rport_priv_size = sizeof(struct fcoe_rport);
- fc_rport_init(lport);
- if (fip->mode == FIP_MODE_VN2VN) {
- lport->point_to_multipoint = 1;
- lport->tt.disc_recv_req = fcoe_ctlr_disc_recv;
- lport->tt.disc_start = fcoe_ctlr_disc_start;
- lport->tt.disc_stop = fcoe_ctlr_disc_stop;
- lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final;
- mutex_init(&lport->disc.disc_mutex);
- INIT_LIST_HEAD(&lport->disc.rports);
- lport->disc.priv = fip;
- } else {
- fc_disc_init(lport);
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(fcoe_libfc_config);
projects / firefly-linux-kernel-4.4.55.git / commitdiff