| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Joe Eykholt | 10440 | 71.82% | 33 | 23.40% |
| Hannes Reinecke | 1379 | 9.49% | 18 | 12.77% |
| Robert Love | 904 | 6.22% | 17 | 12.06% |
| Bhanu Prakash Gollapudi | 753 | 5.18% | 12 | 8.51% |
| Vasu Dev | 282 | 1.94% | 6 | 4.26% |
| Christopher Leech | 231 | 1.59% | 10 | 7.09% |
| Yi Zou | 119 | 0.82% | 8 | 5.67% |
| Chad Dupuis | 100 | 0.69% | 1 | 0.71% |
| Bart Van Assche | 46 | 0.32% | 2 | 1.42% |
| Chengfeng Ye | 40 | 0.28% | 1 | 0.71% |
| John Fastabend | 32 | 0.22% | 1 | 0.71% |
| Sebastian Andrzej Siewior | 32 | 0.22% | 1 | 0.71% |
| Krishna Mohan | 24 | 0.17% | 1 | 0.71% |
| Kees Cook | 20 | 0.14% | 2 | 1.42% |
| Joe Perches | 18 | 0.12% | 2 | 1.42% |
| Sedat Dilek | 17 | 0.12% | 1 | 0.71% |
| Neil Horman | 15 | 0.10% | 1 | 0.71% |
| Neerav Parikh | 14 | 0.10% | 1 | 0.71% |
| Lee Jones | 14 | 0.10% | 2 | 1.42% |
| Gustavo A. R. Silva | 9 | 0.06% | 2 | 1.42% |
| Johannes Thumshirn | 6 | 0.04% | 1 | 0.71% |
| Jason A. Donenfeld | 6 | 0.04% | 2 | 1.42% |
| Javed Hasan | 5 | 0.03% | 1 | 0.71% |
| Usha Ketineni | 5 | 0.03% | 1 | 0.71% |
| Mark D Rustad | 4 | 0.03% | 1 | 0.71% |
| Abhijeet Joglekar | 3 | 0.02% | 1 | 0.71% |
| Wei Yongjun | 2 | 0.01% | 1 | 0.71% |
| Akinobu Mita | 2 | 0.01% | 1 | 0.71% |
| Kaladhar Musunuru | 2 | 0.01% | 1 | 0.71% |
| Lucas De Marchi | 2 | 0.01% | 1 | 0.71% |
| Thomas Gleixner | 2 | 0.01% | 1 | 0.71% |
| Linus Torvalds (pre-git) | 2 | 0.01% | 1 | 0.71% |
| Linus Torvalds | 1 | 0.01% | 1 | 0.71% |
| Kirill A. Shutemov | 1 | 0.01% | 1 | 0.71% |
| Masahiro Yamada | 1 | 0.01% | 1 | 0.71% |
| Johannes Berg | 1 | 0.01% | 1 | 0.71% |
| Miaohe Lin | 1 | 0.01% | 1 | 0.71% |
| Christophe Jaillet | 1 | 0.01% | 1 | 0.71% |
| Total | 14536 | 141 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. * Copyright (c) 2009 Intel Corporation. All rights reserved. * * 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" #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(struct timer_list *); 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 int fcoe_ctlr_vlan_recv(struct fcoe_ctlr *, struct sk_buff *); 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; 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 * @mode: FIP mode to set */ void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_mode mode) { fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); fip->mode = mode; fip->fip_resp = false; INIT_LIST_HEAD(&fip->fcfs); mutex_init(&fip->ctlr_mutex); spin_lock_init(&fip->ctlr_lock); fip->flogi_oxid = FC_XID_UNKNOWN; timer_setup(&fip->timer, fcoe_ctlr_timeout, 0); 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_sysfs_fcf_add() - Add a fcoe_fcf{,_device} to a fcoe_ctlr{,_device} * @new: The newly discovered FCF * * Called with fip->ctlr_mutex held */ static int fcoe_sysfs_fcf_add(struct fcoe_fcf *new) { struct fcoe_ctlr *fip = new->fip; struct fcoe_ctlr_device *ctlr_dev; struct fcoe_fcf_device *temp, *fcf_dev; int rc = -ENOMEM; LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n", new->fabric_name, new->fcf_mac); temp = kzalloc(sizeof(*temp), GFP_KERNEL); if (!temp) goto out; temp->fabric_name = new->fabric_name; temp->switch_name = new->switch_name; temp->fc_map = new->fc_map; temp->vfid = new->vfid; memcpy(temp->mac, new->fcf_mac, ETH_ALEN); temp->priority = new->pri; temp->fka_period = new->fka_period; temp->selected = 0; /* default to unselected */ /* * If ctlr_dev doesn't exist then it means we're a libfcoe user * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device. * fnic would be an example of a driver with this behavior. In this * case we want to add the fcoe_fcf to the fcoe_ctlr list, but we * don't want to make sysfs changes. */ ctlr_dev = fcoe_ctlr_to_ctlr_dev(fip); if (ctlr_dev) { mutex_lock(&ctlr_dev->lock); fcf_dev = fcoe_fcf_device_add(ctlr_dev, temp); if (unlikely(!fcf_dev)) { rc = -ENOMEM; mutex_unlock(&ctlr_dev->lock); goto out; } /* * The fcoe_sysfs layer can return a CONNECTED fcf that * has a priv (fcf was never deleted) or a CONNECTED fcf * that doesn't have a priv (fcf was deleted). However, * libfcoe will always delete FCFs before trying to add * them. This is ensured because both recv_adv and * age_fcfs are protected by the the fcoe_ctlr's mutex. * This means that we should never get a FCF with a * non-NULL priv pointer. */ BUG_ON(fcf_dev->priv); fcf_dev->priv = new; new->fcf_dev = fcf_dev; mutex_unlock(&ctlr_dev->lock); } list_add(&new->list, &fip->fcfs); fip->fcf_count++; rc = 0; out: kfree(temp); return rc; } /** * fcoe_sysfs_fcf_del() - Remove a fcoe_fcf{,_device} to a fcoe_ctlr{,_device} * @new: The FCF to be removed * * Called with fip->ctlr_mutex held */ static void fcoe_sysfs_fcf_del(struct fcoe_fcf *new) { struct fcoe_ctlr *fip = new->fip; struct fcoe_ctlr_device *cdev; struct fcoe_fcf_device *fcf_dev; list_del(&new->list); fip->fcf_count--; /* * If ctlr_dev doesn't exist then it means we're a libfcoe user * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device * or a fcoe_fcf_device. * * fnic would be an example of a driver with this behavior. In this * case we want to remove the fcoe_fcf from the fcoe_ctlr list (above), * but we don't want to make sysfs changes. */ cdev = fcoe_ctlr_to_ctlr_dev(fip); if (cdev) { mutex_lock(&cdev->lock); fcf_dev = fcoe_fcf_to_fcf_dev(new); WARN_ON(!fcf_dev); new->fcf_dev = NULL; fcoe_fcf_device_delete(fcf_dev); mutex_unlock(&cdev->lock); } kfree(new); } /** * 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) { fcoe_sysfs_fcf_del(fcf); } WARN_ON(fip->fcf_count); 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; unsigned long flags; mutex_lock(&fip->ctlr_mutex); spin_lock_irqsave(&fip->ctlr_lock, flags); kfree_skb(fip->flogi_req); fip->flogi_req = NULL; list_for_each_entry(fcf, &fip->fcfs, list) fcf->flogi_sent = 0; spin_unlock_irqrestore(&fip->ctlr_lock, flags); sel = fip->sel_fcf; if (sel && ether_addr_equal(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); eth_zero_addr(fip->dest_addr); } 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->fcoe_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->priority = fip->priority; 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) { if (fip->mode == FIP_MODE_NON_FIP) fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); else fcoe_ctlr_set_state(fip, FIP_ST_AUTO); switch (fip->mode) { default: LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode); fallthrough; case FIP_MODE_AUTO: LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n"); fallthrough; 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->priority = fip->priority; skb_reset_mac_header(skb); skb_reset_network_header(skb); fip->send(fip, skb); } /** * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it * @fip: The FCoE controller for the ELS frame * @lport: The local port * @dtype: The FIP descriptor type for the frame * @skb: The FCoE ELS frame including FC header but no FCoE headers * @d_id: The destination port ID. * * Returns non-zero error code on failure. * * The caller must check that the length is a multiple of 4. * * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). * Headroom includes the FIP encapsulation description, FIP header, and * Ethernet header. The tailroom is for the FIP MAC descriptor. */ static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, u8 dtype, struct sk_buff *skb, u32 d_id) { struct fip_encaps_head { struct ethhdr eth; struct fip_header fip; struct fip_encaps encaps; } __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 = 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 = skb_put_zero(skb, 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->priority = fip->priority; 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; unsigned long flags; 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_irqsave(&fip->ctlr_lock, flags); kfree_skb(fip->flogi_req); fip->flogi_req = skb; fip->flogi_req_send = 1; spin_unlock_irqrestore(&fip->ctlr_lock, flags); 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) goto drop; if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI) goto drop; } 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 receiving 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); } fallthrough; 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: LIBFCOE_FIP_DBG(fip, "drop els_send op %u d_id %x\n", op, ntoh24(fh->fh_d_id)); 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 list_head del_list; INIT_LIST_HEAD(&del_list); 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)) { u64 miss_cnt; miss_cnt = this_cpu_inc_return(fip->lp->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, miss_cnt); } 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; /* * Move to delete list so we can call * fcoe_sysfs_fcf_del (which can sleep) * after the put_cpu(). */ list_del(&fcf->list); list_add(&fcf->list, &del_list); this_cpu_inc(fip->lp->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; } } list_for_each_entry_safe(fcf, next, &del_list, list) { /* Removes fcf from current list */ fcoe_sysfs_fcf_del(fcf); } 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); memcpy(fcf->fcoe_mac, fcf->fcf_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_NON_CRITICAL) 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; unsigned long sol_tov = msecs_to_jiffies(FCOE_CTLR_SOL_TOV); int first = 0; int mtu_valid; int found = 0; int rc = 0; if (fcoe_ctlr_parse_adv(fip, skb, &new)) return; mutex_lock(&fip->ctlr_mutex); first = list_empty(&fip->fcfs); list_for_each_entry(fcf, &fip->fcfs, list) { if (fcf->switch_name == new.switch_name && fcf->fabric_name == new.fabric_name && fcf->fc_map == new.fc_map && ether_addr_equal(fcf->fcf_mac, new.fcf_mac)) { found = 1; break; } } if (!found) { if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) goto out; fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); if (!fcf) goto out; memcpy(fcf, &new, sizeof(new)); fcf->fip = fip; rc = fcoe_sysfs_fcf_add(fcf); if (rc) { printk(KERN_ERR "Failed to allocate sysfs instance " "for FCF, fab %16.16llx mac %pM\n", new.fabric_name, new.fcf_mac); kfree(fcf); goto out; } } 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_move(&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 && !fip->sel_time && fcoe_ctlr_fcf_usable(fcf)) { fip->sel_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); if (!timer_pending(&fip->timer) || time_before(fip->sel_time, fip->timer.expires)) mod_timer(&fip->timer, fip->sel_time); } out: 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_fcf *sel; 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->fip_dtype != FIP_DT_MAC) && (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: sel = fip->sel_fcf; if (desc_cnt == 1) { LIBFCOE_FIP_DBG(fip, "FIP descriptors " "received out of order\n"); goto drop; } /* * Some switch implementations send two MAC descriptors, * with first MAC(granted_mac) being the FPMA, and the * second one(fcoe_mac) is used as destination address * for sending/receiving FCoE packets. FIP traffic is * sent using fip_mac. For regular switches, both * fip_mac and fcoe_mac would be the same. */ if (desc_cnt == 2) memcpy(granted_mac, ((struct fip_mac_desc *)desc)->fd_mac, ETH_ALEN); if (dlen != sizeof(struct fip_mac_desc)) goto len_err; if ((desc_cnt == 3) && (sel)) memcpy(sel->fcoe_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_NON_CRITICAL) 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; this_cpu_inc(lport->stats->RxFrames); this_cpu_add(lport->stats->RxWords, skb->len / FIP_BPW); 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_clr_vlink() - Handle an incoming link reset frame * @fip: The FCoE controller that received the frame * @skb: The received FIP packet * * 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 sk_buff *skb) { 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 num_vlink_desc; int reset_phys_port = 0; struct fip_vn_desc **vlink_desc_arr = NULL; struct fip_header *fh = (struct fip_header *)skb->data; struct ethhdr *eh = eth_hdr(skb); LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); if (!fcf) { /* * We are yet to select best FCF, but we got CVL in the * meantime. reset the ctlr and let it rediscover the FCF */ LIBFCOE_FIP_DBG(fip, "Resetting fcoe_ctlr as FCF has not been " "selected yet\n"); mutex_lock(&fip->ctlr_mutex); fcoe_ctlr_reset(fip); mutex_unlock(&fip->ctlr_mutex); return; } /* * If we've selected an FCF check that the CVL is from there to avoid * processing CVLs from an unexpected source. If it is from an * unexpected source drop it on the floor. */ if (!ether_addr_equal(eh->h_source, fcf->fcf_mac)) { LIBFCOE_FIP_DBG(fip, "Dropping CVL due to source address " "mismatch with FCF src=%pM\n", eh->h_source); return; } /* * If we haven't logged into the fabric but receive a CVL we should * reset everything and go back to solicitation. */ if (!lport->port_id) { LIBFCOE_FIP_DBG(fip, "lport not logged in, resoliciting\n"); mutex_lock(&fip->ctlr_mutex); fcoe_ctlr_reset(fip); mutex_unlock(&fip->ctlr_mutex); fc_lport_reset(fip->lp); fcoe_ctlr_solicit(fip, NULL); return; } /* * mask of required descriptors. Validating each one clears its bit. */ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME); rlen = ntohs(fh->fip_dl_len) * FIP_BPW; desc = (struct fip_desc *)(fh + 1); /* * Actually need to subtract 'sizeof(*mp) - sizeof(*wp)' from 'rlen' * before determining max Vx_Port descriptor but a buggy FCF could have * omitted either or both MAC Address and Name Identifier descriptors */ num_vlink_desc = rlen / sizeof(*vp); if (num_vlink_desc) vlink_desc_arr = kmalloc_array(num_vlink_desc, sizeof(vp), GFP_ATOMIC); if (!vlink_desc_arr) return; num_vlink_desc = 0; while (rlen >= sizeof(*desc)) { dlen = desc->fip_dlen * FIP_BPW; if (dlen > rlen) goto err; /* Drop CVL if there are duplicate critical descriptors */ if ((desc->fip_dtype < 32) && (desc->fip_dtype != FIP_DT_VN_ID) && !(desc_mask & 1U << desc->fip_dtype)) { LIBFCOE_FIP_DBG(fip, "Duplicate Critical " "Descriptors in FIP CVL\n"); goto err; } switch (desc->fip_dtype) { case FIP_DT_MAC: mp = (struct fip_mac_desc *)desc; if (dlen < sizeof(*mp)) goto err; if (!ether_addr_equal(mp->fd_mac, fcf->fcf_mac)) goto err; desc_mask &= ~BIT(FIP_DT_MAC); break; case FIP_DT_NAME: wp = (struct fip_wwn_desc *)desc; if (dlen < sizeof(*wp)) goto err; if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) goto err; desc_mask &= ~BIT(FIP_DT_NAME); break; case FIP_DT_VN_ID: vp = (struct fip_vn_desc *)desc; if (dlen < sizeof(*vp)) goto err; vlink_desc_arr[num_vlink_desc++] = vp; vn_port = fc_vport_id_lookup(lport, ntoh24(vp->fd_fc_id)); if (vn_port && (vn_port == lport)) { mutex_lock(&fip->ctlr_mutex); this_cpu_inc(lport->stats->VLinkFailureCount); fcoe_ctlr_reset(fip); mutex_unlock(&fip->ctlr_mutex); } break; default: /* standard says ignore unknown descriptors >= 128 */ if (desc->fip_dtype < FIP_DT_NON_CRITICAL) goto err; 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 if (!num_vlink_desc) { LIBFCOE_FIP_DBG(fip, "CVL: no Vx_Port descriptor found\n"); /* * No Vx_Port description. Clear all NPIV ports, * followed by physical port */ mutex_lock(&fip->ctlr_mutex); this_cpu_inc(lport->stats->VLinkFailureCount); fcoe_ctlr_reset(fip); mutex_unlock(&fip->ctlr_mutex); mutex_lock(&lport->lp_mutex); list_for_each_entry(vn_port, &lport->vports, list) fc_lport_reset(vn_port); mutex_unlock(&lport->lp_mutex); fc_lport_reset(fip->lp); fcoe_ctlr_solicit(fip, NULL); } else { int i; LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n"); for (i = 0; i < num_vlink_desc; i++) { vp = vlink_desc_arr[i]; vn_port = fc_vport_id_lookup(lport, ntoh24(vp->fd_fc_id)); if (!vn_port) continue; /* * 'port_id' is already validated, check MAC address and * wwpn */ if (!ether_addr_equal(fip->get_src_addr(vn_port), vp->fd_mac) || get_unaligned_be64(&vp->fd_wwpn) != vn_port->wwpn) continue; if (vn_port == lport) /* * Physical port, defer processing till all * listed NPIV ports are cleared */ reset_phys_port = 1; else /* NPIV port */ fc_lport_reset(vn_port); } if (reset_phys_port) { fc_lport_reset(fip->lp); fcoe_ctlr_solicit(fip, NULL); } } err: kfree(vlink_desc_arr); } /** * 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 = skb_share_check(skb, GFP_ATOMIC); if (!skb) return; 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; bool fip_vlan_resp = false; 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 (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) && !ether_addr_equal(eh->h_dest, fcoe_all_vn2vn) && !ether_addr_equal(eh->h_dest, fcoe_all_p2p)) goto drop; } else if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) && !ether_addr_equal(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"); } fip_vlan_resp = fip->fip_resp; mutex_unlock(&fip->ctlr_mutex); if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN) return fcoe_ctlr_vn_recv(fip, skb); if (fip_vlan_resp && op == FIP_OP_VLAN) { LIBFCOE_FIP_DBG(fip, "fip vlan discovery\n"); return fcoe_ctlr_vlan_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, skb); 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; 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 (!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; if (fcf->fabric_name != best->fabric_name || fcf->vfid != best->vfid || fcf->fc_map != best->fc_map) { LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " "or FC-MAP\n"); return NULL; } } 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; unsigned long flags; int error; mutex_lock(&fip->ctlr_mutex); spin_lock_irqsave(&fip->ctlr_lock, flags); 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_irqrestore(&fip->ctlr_lock, flags); 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; unsigned long flags; spin_lock_irqsave(&fip->ctlr_lock, flags); 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_irqrestore(&fip->ctlr_lock, flags); } /** * fcoe_ctlr_timeout() - FIP timeout handler * @t: Timer context use to obtain the controller reference */ static void fcoe_ctlr_timeout(struct timer_list *t) { struct fcoe_ctlr *fip = from_timer(fip, t, timer); 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 * @lport: The local port * @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 (ether_addr_equal(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[ETH_ALEN], 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 container_of(rdata, struct fcoe_rport, rdata); } /** * 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_vn2vn_probe_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_vn2vn_probe_frame *)skb->data; memset(frame, 0, len); memcpy(frame->eth.h_dest, dest, ETH_ALEN); if (sub == FIP_SC_VN_BEACON) { hton24(frame->eth.h_source, FIP_VN_FC_MAP); hton24(frame->eth.h_source + 3, fip->port_id); } else { 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->priority = fip->priority; 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 occurred * * 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); fc_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 * @lport: The local port * * Called with ctlr_mutex held. */ static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport) { struct fc_rport_priv *rdata; mutex_lock(&lport->disc.disc_mutex); list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) { if (kref_get_unless_zero(&rdata->kref)) { fc_rport_logoff(rdata); kref_put(&rdata->kref, fc_rport_destroy); } } lport->disc.disc_callback = NULL; mutex_unlock(&lport->disc.disc_mutex); } /** * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode * @lport: The local port * * 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 * @lport: The local port * * 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); fc_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 = prandom_u32_state(&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 = get_random_u32_below(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; prandom_seed_state(&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 * @frport: parsed FCoE rport from the probe request * * 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 fcoe_rport *frport) { 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; size_t rlen; size_t dlen; u32 desc_mask = 0; u32 dtype; u8 sub; 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; frport->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); frport->rdata.ids.port_id = ntoh24(vn->fd_fc_id); frport->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_NON_CRITICAL) 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 * @frport: parsed FCoE rport from the probe request * * Called with ctlr_mutex held. */ static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip, struct fcoe_rport *frport) { if (frport->rdata.ids.port_id != fip->port_id) return; switch (fip->state) { case FIP_ST_VNMP_CLAIM: case FIP_ST_VNMP_UP: LIBFCOE_FIP_DBG(fip, "vn_probe_req: send reply, state %x\n", fip->state); 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 > frport->rdata.ids.port_name && !(frport->flags & FIP_FL_REC_OR_P2P)) { LIBFCOE_FIP_DBG(fip, "vn_probe_req: " "port_id collision\n"); fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, frport->enode_mac, 0); break; } fallthrough; case FIP_ST_VNMP_START: LIBFCOE_FIP_DBG(fip, "vn_probe_req: " "restart VN2VN negotiation\n"); fcoe_ctlr_vn_restart(fip); break; default: LIBFCOE_FIP_DBG(fip, "vn_probe_req: ignore state %x\n", fip->state); break; } } /** * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply. * @fip: The FCoE controller * @frport: parsed FCoE rport from the probe request * * Called with ctlr_mutex held. */ static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip, struct fcoe_rport *frport) { if (frport->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: LIBFCOE_FIP_DBG(fip, "vn_probe_reply: restart state %x\n", fip->state); fcoe_ctlr_vn_restart(fip); break; case FIP_ST_VNMP_UP: LIBFCOE_FIP_DBG(fip, "vn_probe_reply: send claim notify\n"); 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 FCoE rport as a template for new rdata * * Called with ctlr_mutex held. */ static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fcoe_rport *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->rdata.ids.port_id; if (port_id == fip->port_id) return; mutex_lock(&lport->disc.disc_mutex); rdata = fc_rport_create(lport, port_id); if (!rdata) { mutex_unlock(&lport->disc.disc_mutex); return; } mutex_lock(&rdata->rp_mutex); mutex_unlock(&lport->disc.disc_mutex); 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->rdata.ids.port_name) || (ids->node_name != -1 && ids->node_name != new->rdata.ids.node_name)) { mutex_unlock(&rdata->rp_mutex); LIBFCOE_FIP_DBG(fip, "vn_add rport logoff %6.6x\n", port_id); fc_rport_logoff(rdata); mutex_lock(&rdata->rp_mutex); } ids->port_name = new->rdata.ids.port_name; ids->node_name = new->rdata.ids.node_name; mutex_unlock(&rdata->rp_mutex); frport = fcoe_ctlr_rport(rdata); LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s state %d\n", port_id, frport->fcoe_len ? "old" : "new", rdata->rp_state); frport->fcoe_len = new->fcoe_len; frport->flags = new->flags; frport->login_count = new->login_count; memcpy(frport->enode_mac, new->enode_mac, ETH_ALEN); memcpy(frport->vn_mac, new->vn_mac, ETH_ALEN); 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; rdata = fc_rport_lookup(lport, port_id); if (rdata) { frport = fcoe_ctlr_rport(rdata); memcpy(mac, frport->enode_mac, ETH_ALEN); ret = 0; kref_put(&rdata->kref, fc_rport_destroy); } return ret; } /** * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification * @fip: The FCoE controller * @new: newly-parsed FCoE rport as a template for new rdata * * Called with ctlr_mutex held. */ static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip, struct fcoe_rport *new) { if (new->flags & FIP_FL_REC_OR_P2P) { LIBFCOE_FIP_DBG(fip, "send probe req for P2P/REC\n"); 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->rdata.ids.port_id == fip->port_id) { LIBFCOE_FIP_DBG(fip, "vn_claim_notify: " "restart, state %d\n", fip->state); fcoe_ctlr_vn_restart(fip); } break; case FIP_ST_VNMP_CLAIM: case FIP_ST_VNMP_UP: if (new->rdata.ids.port_id == fip->port_id) { if (new->rdata.ids.port_name > fip->lp->wwpn) { LIBFCOE_FIP_DBG(fip, "vn_claim_notify: " "restart, port_id collision\n"); fcoe_ctlr_vn_restart(fip); break; } LIBFCOE_FIP_DBG(fip, "vn_claim_notify: " "send claim notify\n"); fcoe_ctlr_vn_send_claim(fip); break; } LIBFCOE_FIP_DBG(fip, "vn_claim_notify: send reply to %x\n", new->rdata.ids.port_id); fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, new->enode_mac, min((u32)new->fcoe_len, fcoe_ctlr_fcoe_size(fip))); fcoe_ctlr_vn_add(fip, new); break; default: LIBFCOE_FIP_DBG(fip, "vn_claim_notify: " "ignoring claim from %x\n", new->rdata.ids.port_id); break; } } /** * fcoe_ctlr_vn_claim_resp() - handle received Claim Response * @fip: The FCoE controller that received the frame * @new: newly-parsed FCoE rport from the Claim Response * * Called with ctlr_mutex held. */ static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip, struct fcoe_rport *new) { LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n", new->rdata.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 FCoE rport from the Beacon * * Called with ctlr_mutex held. */ static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip, struct fcoe_rport *new) { struct fc_lport *lport = fip->lp; struct fc_rport_priv *rdata; struct fcoe_rport *frport; if (new->flags & FIP_FL_REC_OR_P2P) { LIBFCOE_FIP_DBG(fip, "p2p beacon while in vn2vn mode\n"); fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); return; } rdata = fc_rport_lookup(lport, new->rdata.ids.port_id); if (rdata) { if (rdata->ids.node_name == new->rdata.ids.node_name && rdata->ids.port_name == new->rdata.ids.port_name) { frport = fcoe_ctlr_rport(rdata); LIBFCOE_FIP_DBG(fip, "beacon from rport %x\n", rdata->ids.port_id); if (!frport->time && fip->state == FIP_ST_VNMP_UP) { LIBFCOE_FIP_DBG(fip, "beacon expired " "for rport %x\n", rdata->ids.port_id); fc_rport_login(rdata); } frport->time = jiffies; } kref_put(&rdata->kref, fc_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->rdata.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) { if (!kref_get_unless_zero(&rdata->kref)) continue; frport = fcoe_ctlr_rport(rdata); if (!frport->time) { kref_put(&rdata->kref, fc_rport_destroy); 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); fc_rport_logoff(rdata); } else if (time_before(deadline, next_time)) next_time = deadline; kref_put(&rdata->kref, fc_rport_destroy); } 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 fcoe_rport frport = { }; int rc, vlan_id = 0; fiph = (struct fip_header *)skb->data; sub = fiph->fip_subcode; if (fip->lp->vlan) vlan_id = skb_vlan_tag_get_id(skb); if (vlan_id && vlan_id != fip->lp->vlan) { LIBFCOE_FIP_DBG(fip, "vn_recv drop frame sub %x vlan %d\n", sub, vlan_id); rc = -EAGAIN; goto drop; } rc = fcoe_ctlr_vn_parse(fip, skb, &frport); 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, &frport); break; case FIP_SC_VN_PROBE_REP: fcoe_ctlr_vn_probe_reply(fip, &frport); break; case FIP_SC_VN_CLAIM_NOTIFY: fcoe_ctlr_vn_claim_notify(fip, &frport); break; case FIP_SC_VN_CLAIM_REP: fcoe_ctlr_vn_claim_resp(fip, &frport); break; case FIP_SC_VN_BEACON: fcoe_ctlr_vn_beacon(fip, &frport); 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_vlan_parse - parse vlan discovery request or response * @fip: The FCoE controller * @skb: incoming packet * @frport: parsed FCoE rport from the probe request * * Returns non-zero error number on error. * Does not consume the packet. */ static int fcoe_ctlr_vlan_parse(struct fcoe_ctlr *fip, struct sk_buff *skb, struct fcoe_rport *frport) { struct fip_header *fiph; struct fip_desc *desc = NULL; struct fip_mac_desc *macd = NULL; struct fip_wwn_desc *wwn = NULL; size_t rlen; size_t dlen; u32 desc_mask = 0; u32 dtype; u8 sub; fiph = (struct fip_header *)skb->data; frport->flags = ntohs(fiph->fip_flags); sub = fiph->fip_subcode; switch (sub) { case FIP_SC_VL_REQ: desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME); 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; frport->rdata.ids.node_name = get_unaligned_be64(&wwn->fd_wwn); 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_NON_CRITICAL) 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_vlan_send() - Send a FIP VLAN Notification * @fip: The FCoE controller * @sub: sub-opcode for vlan notification or vn2vn vlan notification * @dest: The destination Ethernet MAC address */ static void fcoe_ctlr_vlan_send(struct fcoe_ctlr *fip, enum fip_vlan_subcode sub, const u8 *dest) { struct sk_buff *skb; struct fip_vlan_notify_frame { struct ethhdr eth; struct fip_header fip; struct fip_mac_desc mac; struct fip_vlan_desc vlan; } __packed * frame; size_t len; size_t dlen; len = sizeof(*frame); dlen = sizeof(frame->mac) + sizeof(frame->vlan); len = max(len, sizeof(struct ethhdr)); skb = dev_alloc_skb(len); if (!skb) return; LIBFCOE_FIP_DBG(fip, "fip %s vlan notification, vlan %d\n", fip->mode == FIP_MODE_VN2VN ? "vn2vn" : "fcf", fip->lp->vlan); frame = (struct fip_vlan_notify_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_VLAN); 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->vlan.fd_desc.fip_dtype = FIP_DT_VLAN; frame->vlan.fd_desc.fip_dlen = sizeof(frame->vlan) / FIP_BPW; put_unaligned_be16(fip->lp->vlan, &frame->vlan.fd_vlan); skb_put(skb, len); skb->protocol = htons(ETH_P_FIP); skb->priority = fip->priority; skb_reset_mac_header(skb); skb_reset_network_header(skb); fip->send(fip, skb); } /** * fcoe_ctlr_vlan_disc_reply() - send FIP VLAN Discovery Notification. * @fip: The FCoE controller * @frport: The newly-parsed FCoE rport from the Discovery Request * * Called with ctlr_mutex held. */ static void fcoe_ctlr_vlan_disc_reply(struct fcoe_ctlr *fip, struct fcoe_rport *frport) { enum fip_vlan_subcode sub = FIP_SC_VL_NOTE; if (fip->mode == FIP_MODE_VN2VN) sub = FIP_SC_VL_VN2VN_NOTE; fcoe_ctlr_vlan_send(fip, sub, frport->enode_mac); } /** * fcoe_ctlr_vlan_recv - vlan request receive handler for VN2VN mode. * @fip: The FCoE controller * @skb: The received FIP packet */ static int fcoe_ctlr_vlan_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) { struct fip_header *fiph; enum fip_vlan_subcode sub; struct fcoe_rport frport = { }; int rc; fiph = (struct fip_header *)skb->data; sub = fiph->fip_subcode; rc = fcoe_ctlr_vlan_parse(fip, skb, &frport); if (rc) { LIBFCOE_FIP_DBG(fip, "vlan_recv vlan_parse error %d\n", rc); goto drop; } mutex_lock(&fip->ctlr_mutex); if (sub == FIP_SC_VL_REQ) fcoe_ctlr_vlan_disc_reply(fip, &frport); 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; fc_seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); fc_frame_free(fp); } /* * fcoe_ctlr_disc_start - start discovery for VN2VN mode. * * 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) { if (!kref_get_unless_zero(&rdata->kref)) continue; frport = fcoe_ctlr_rport(rdata); if (frport->time) fc_rport_login(rdata); kref_put(&rdata->kref, fc_rport_destroy); } 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); LIBFCOE_FIP_DBG(fip, "vn_timeout: send 1st probe request\n"); 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); LIBFCOE_FIP_DBG(fip, "vn_timeout: send 2nd probe request\n"); 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); LIBFCOE_FIP_DBG(fip, "vn_timeout: send claim notify\n"); 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); LIBFCOE_FIP_DBG(fip, "vn_timeout: send vn2vn beacon\n"); 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)) { LIBFCOE_FIP_DBG(fip, "vn_timeout: send vn2vn beacon\n"); 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 + get_random_u32_below(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_ctlr_mode_set() - Set or reset the ctlr's mode * @lport: The local port to be (re)configured * @fip: The FCoE controller whose mode is changing * @fip_mode: The new fip mode * * Note that the we shouldn't be changing the libfc discovery settings * (fc_disc_config) while an lport is going through the libfc state * machine. The mode can only be changed when a fcoe_ctlr device is * disabled, so that should ensure that this routine is only called * when nothing is happening. */ static void fcoe_ctlr_mode_set(struct fc_lport *lport, struct fcoe_ctlr *fip, enum fip_mode fip_mode) { void *priv; WARN_ON(lport->state != LPORT_ST_RESET && lport->state != LPORT_ST_DISABLED); if (fip_mode == FIP_MODE_VN2VN) { lport->rport_priv_size = sizeof(struct fcoe_rport); 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; priv = fip; } else { lport->rport_priv_size = 0; lport->point_to_multipoint = 0; lport->tt.disc_recv_req = NULL; lport->tt.disc_start = NULL; lport->tt.disc_stop = NULL; lport->tt.disc_stop_final = NULL; priv = lport; } fc_disc_config(lport, priv); } /** * fcoe_libfc_config() - Sets up libfc related properties for local port * @lport: 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); fc_disc_init(lport); fcoe_ctlr_mode_set(lport, fip, fip->mode); return 0; } EXPORT_SYMBOL_GPL(fcoe_libfc_config); void fcoe_fcf_get_selected(struct fcoe_fcf_device *fcf_dev) { struct fcoe_ctlr_device *ctlr_dev = fcoe_fcf_dev_to_ctlr_dev(fcf_dev); struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr_dev); struct fcoe_fcf *fcf; mutex_lock(&fip->ctlr_mutex); mutex_lock(&ctlr_dev->lock); fcf = fcoe_fcf_device_priv(fcf_dev); if (fcf) fcf_dev->selected = (fcf == fip->sel_fcf) ? 1 : 0; else fcf_dev->selected = 0; mutex_unlock(&ctlr_dev->lock); mutex_unlock(&fip->ctlr_mutex); } EXPORT_SYMBOL(fcoe_fcf_get_selected); void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *ctlr_dev) { struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); struct fc_lport *lport = ctlr->lp; mutex_lock(&ctlr->ctlr_mutex); switch (ctlr_dev->mode) { case FIP_CONN_TYPE_VN2VN: ctlr->mode = FIP_MODE_VN2VN; break; case FIP_CONN_TYPE_FABRIC: default: ctlr->mode = FIP_MODE_FABRIC; break; } mutex_unlock(&ctlr->ctlr_mutex); fcoe_ctlr_mode_set(lport, ctlr, ctlr->mode); } EXPORT_SYMBOL(fcoe_ctlr_set_fip_mode);
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