1412 lines
38 KiB
C
1412 lines
38 KiB
C
/*
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* Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2009 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Maintained at www.Open-FCoE.org
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*/
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/timer.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include <linux/errno.h>
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#include <linux/bitops.h>
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#include <net/rtnetlink.h>
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#include <scsi/fc/fc_els.h>
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#include <scsi/fc/fc_fs.h>
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#include <scsi/fc/fc_fip.h>
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#include <scsi/fc/fc_encaps.h>
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#include <scsi/fc/fc_fcoe.h>
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#include <scsi/libfc.h>
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#include <scsi/libfcoe.h>
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MODULE_AUTHOR("Open-FCoE.org");
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MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs");
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MODULE_LICENSE("GPL v2");
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#define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */
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#define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */
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static void fcoe_ctlr_timeout(unsigned long);
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static void fcoe_ctlr_link_work(struct work_struct *);
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static void fcoe_ctlr_recv_work(struct work_struct *);
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static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
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unsigned int libfcoe_debug_logging;
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module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
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#define LIBFCOE_LOGGING 0x01 /* General logging, not categorized */
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#define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */
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#define LIBFCOE_CHECK_LOGGING(LEVEL, CMD) \
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do { \
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if (unlikely(libfcoe_debug_logging & LEVEL)) \
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do { \
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CMD; \
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} while (0); \
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} while (0)
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#define LIBFCOE_DBG(fmt, args...) \
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LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING, \
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printk(KERN_INFO "libfcoe: " fmt, ##args);)
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#define LIBFCOE_FIP_DBG(fip, fmt, args...) \
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LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \
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printk(KERN_INFO "host%d: fip: " fmt, \
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(fip)->lp->host->host_no, ##args);)
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/**
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* fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid
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* @fcf: The FCF to check
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*
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* Return non-zero if FCF fcoe_size has been validated.
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*/
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static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf)
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{
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return (fcf->flags & FIP_FL_SOL) != 0;
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}
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/**
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* fcoe_ctlr_fcf_usable() - Check if a FCF is usable
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* @fcf: The FCF to check
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*
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* Return non-zero if the FCF is usable.
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*/
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static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf)
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{
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u16 flags = FIP_FL_SOL | FIP_FL_AVAIL;
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return (fcf->flags & flags) == flags;
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}
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/**
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* fcoe_ctlr_init() - Initialize the FCoE Controller instance
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* @fip: The FCoE controller to initialize
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*/
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void fcoe_ctlr_init(struct fcoe_ctlr *fip)
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{
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fip->state = FIP_ST_LINK_WAIT;
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fip->mode = FIP_ST_AUTO;
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INIT_LIST_HEAD(&fip->fcfs);
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spin_lock_init(&fip->lock);
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fip->flogi_oxid = FC_XID_UNKNOWN;
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setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip);
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INIT_WORK(&fip->link_work, fcoe_ctlr_link_work);
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INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work);
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skb_queue_head_init(&fip->fip_recv_list);
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}
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EXPORT_SYMBOL(fcoe_ctlr_init);
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/**
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* fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller
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* @fip: The FCoE controller whose FCFs are to be reset
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*
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* Called with &fcoe_ctlr lock held.
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*/
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static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip)
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{
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struct fcoe_fcf *fcf;
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struct fcoe_fcf *next;
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fip->sel_fcf = NULL;
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list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
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list_del(&fcf->list);
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kfree(fcf);
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}
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fip->fcf_count = 0;
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fip->sel_time = 0;
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}
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/**
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* fcoe_ctlr_destroy() - Disable and tear down a FCoE controller
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* @fip: The FCoE controller to tear down
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*
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* This is called by FCoE drivers before freeing the &fcoe_ctlr.
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*
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* The receive handler will have been deleted before this to guarantee
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* that no more recv_work will be scheduled.
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*
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* The timer routine will simply return once we set FIP_ST_DISABLED.
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* This guarantees that no further timeouts or work will be scheduled.
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*/
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void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
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{
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cancel_work_sync(&fip->recv_work);
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skb_queue_purge(&fip->fip_recv_list);
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spin_lock_bh(&fip->lock);
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fip->state = FIP_ST_DISABLED;
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fcoe_ctlr_reset_fcfs(fip);
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spin_unlock_bh(&fip->lock);
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del_timer_sync(&fip->timer);
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cancel_work_sync(&fip->link_work);
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}
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EXPORT_SYMBOL(fcoe_ctlr_destroy);
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/**
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* fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port
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* @fip: The FCoE controller to get the maximum FCoE size from
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*
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* Returns the maximum packet size including the FCoE header and trailer,
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* but not including any Ethernet or VLAN headers.
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*/
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static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip)
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{
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/*
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* Determine the max FCoE frame size allowed, including
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* FCoE header and trailer.
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* Note: lp->mfs is currently the payload size, not the frame size.
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*/
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return fip->lp->mfs + sizeof(struct fc_frame_header) +
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sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof);
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}
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/**
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* fcoe_ctlr_solicit() - Send a FIP solicitation
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* @fip: The FCoE controller to send the solicitation on
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* @fcf: The destination FCF (if NULL, a multicast solicitation is sent)
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*/
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static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
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{
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struct sk_buff *skb;
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struct fip_sol {
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struct ethhdr eth;
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struct fip_header fip;
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struct {
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struct fip_mac_desc mac;
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struct fip_wwn_desc wwnn;
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struct fip_size_desc size;
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} __attribute__((packed)) desc;
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} __attribute__((packed)) *sol;
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u32 fcoe_size;
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skb = dev_alloc_skb(sizeof(*sol));
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if (!skb)
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return;
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sol = (struct fip_sol *)skb->data;
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memset(sol, 0, sizeof(*sol));
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memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN);
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memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
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sol->eth.h_proto = htons(ETH_P_FIP);
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sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
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sol->fip.fip_op = htons(FIP_OP_DISC);
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sol->fip.fip_subcode = FIP_SC_SOL;
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sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW);
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sol->fip.fip_flags = htons(FIP_FL_FPMA);
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if (fip->spma)
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sol->fip.fip_flags |= htons(FIP_FL_SPMA);
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sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
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sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW;
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memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
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sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
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sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW;
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put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn);
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fcoe_size = fcoe_ctlr_fcoe_size(fip);
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sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
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sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW;
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sol->desc.size.fd_size = htons(fcoe_size);
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skb_put(skb, sizeof(*sol));
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skb->protocol = htons(ETH_P_FIP);
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skb_reset_mac_header(skb);
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skb_reset_network_header(skb);
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fip->send(fip, skb);
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if (!fcf)
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fip->sol_time = jiffies;
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}
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/**
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* fcoe_ctlr_link_up() - Start FCoE controller
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* @fip: The FCoE controller to start
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*
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* Called from the LLD when the network link is ready.
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*/
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void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
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{
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spin_lock_bh(&fip->lock);
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if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) {
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fip->last_link = 1;
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fip->link = 1;
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spin_unlock_bh(&fip->lock);
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fc_linkup(fip->lp);
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} else if (fip->state == FIP_ST_LINK_WAIT) {
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fip->state = fip->mode;
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fip->last_link = 1;
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fip->link = 1;
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spin_unlock_bh(&fip->lock);
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if (fip->state == FIP_ST_AUTO)
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LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n");
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fc_linkup(fip->lp);
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fcoe_ctlr_solicit(fip, NULL);
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} else
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spin_unlock_bh(&fip->lock);
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}
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EXPORT_SYMBOL(fcoe_ctlr_link_up);
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/**
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* fcoe_ctlr_reset() - Reset a FCoE controller
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* @fip: The FCoE controller to reset
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*/
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static void fcoe_ctlr_reset(struct fcoe_ctlr *fip)
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{
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fcoe_ctlr_reset_fcfs(fip);
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del_timer(&fip->timer);
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fip->ctlr_ka_time = 0;
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fip->port_ka_time = 0;
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fip->sol_time = 0;
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fip->flogi_oxid = FC_XID_UNKNOWN;
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fip->map_dest = 0;
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}
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/**
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* fcoe_ctlr_link_down() - Stop a FCoE controller
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* @fip: The FCoE controller to be stopped
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*
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* Returns non-zero if the link was up and now isn't.
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*
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* Called from the LLD when the network link is not ready.
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* There may be multiple calls while the link is down.
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*/
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int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
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{
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int link_dropped;
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LIBFCOE_FIP_DBG(fip, "link down.\n");
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spin_lock_bh(&fip->lock);
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fcoe_ctlr_reset(fip);
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link_dropped = fip->link;
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fip->link = 0;
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fip->last_link = 0;
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fip->state = FIP_ST_LINK_WAIT;
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spin_unlock_bh(&fip->lock);
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if (link_dropped)
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fc_linkdown(fip->lp);
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return link_dropped;
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}
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EXPORT_SYMBOL(fcoe_ctlr_link_down);
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/**
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* fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF
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* @fip: The FCoE controller to send the FKA on
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* @lport: libfc fc_lport to send from
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* @ports: 0 for controller keep-alive, 1 for port keep-alive
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* @sa: The source MAC address
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*
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* A controller keep-alive is sent every fka_period (typically 8 seconds).
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* The source MAC is the native MAC address.
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*
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* A port keep-alive is sent every 90 seconds while logged in.
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* The source MAC is the assigned mapped source address.
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* The destination is the FCF's F-port.
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*/
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static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
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struct fc_lport *lport,
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int ports, u8 *sa)
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{
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struct sk_buff *skb;
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struct fip_kal {
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struct ethhdr eth;
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struct fip_header fip;
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struct fip_mac_desc mac;
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} __attribute__((packed)) *kal;
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struct fip_vn_desc *vn;
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u32 len;
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struct fc_lport *lp;
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struct fcoe_fcf *fcf;
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fcf = fip->sel_fcf;
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lp = fip->lp;
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if (!fcf || !fc_host_port_id(lp->host))
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return;
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len = sizeof(*kal) + ports * sizeof(*vn);
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skb = dev_alloc_skb(len);
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if (!skb)
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return;
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kal = (struct fip_kal *)skb->data;
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memset(kal, 0, len);
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memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
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memcpy(kal->eth.h_source, sa, ETH_ALEN);
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kal->eth.h_proto = htons(ETH_P_FIP);
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kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
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kal->fip.fip_op = htons(FIP_OP_CTRL);
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kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE;
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kal->fip.fip_dl_len = htons((sizeof(kal->mac) +
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ports * sizeof(*vn)) / FIP_BPW);
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kal->fip.fip_flags = htons(FIP_FL_FPMA);
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if (fip->spma)
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kal->fip.fip_flags |= htons(FIP_FL_SPMA);
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kal->mac.fd_desc.fip_dtype = FIP_DT_MAC;
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kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW;
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memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
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if (ports) {
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vn = (struct fip_vn_desc *)(kal + 1);
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vn->fd_desc.fip_dtype = FIP_DT_VN_ID;
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vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW;
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memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
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hton24(vn->fd_fc_id, fc_host_port_id(lp->host));
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put_unaligned_be64(lp->wwpn, &vn->fd_wwpn);
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}
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skb_put(skb, len);
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skb->protocol = htons(ETH_P_FIP);
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skb_reset_mac_header(skb);
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skb_reset_network_header(skb);
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fip->send(fip, skb);
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}
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/**
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* fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it
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* @fip: The FCoE controller for the ELS frame
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* @dtype: The FIP descriptor type for the frame
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* @skb: The FCoE ELS frame including FC header but no FCoE headers
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*
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* Returns non-zero error code on failure.
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*
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* The caller must check that the length is a multiple of 4.
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*
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* The @skb must have enough headroom (28 bytes) and tailroom (8 bytes).
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* Headroom includes the FIP encapsulation description, FIP header, and
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* Ethernet header. The tailroom is for the FIP MAC descriptor.
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*/
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static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport,
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u8 dtype, struct sk_buff *skb)
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{
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struct fip_encaps_head {
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struct ethhdr eth;
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struct fip_header fip;
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struct fip_encaps encaps;
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} __attribute__((packed)) *cap;
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struct fip_mac_desc *mac;
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struct fcoe_fcf *fcf;
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size_t dlen;
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u16 fip_flags;
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fcf = fip->sel_fcf;
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if (!fcf)
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return -ENODEV;
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/* set flags according to both FCF and lport's capability on SPMA */
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fip_flags = fcf->flags;
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fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : FIP_FL_FPMA;
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if (!fip_flags)
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return -ENODEV;
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dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */
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cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap));
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memset(cap, 0, sizeof(*cap));
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memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
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memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
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cap->eth.h_proto = htons(ETH_P_FIP);
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cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
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cap->fip.fip_op = htons(FIP_OP_LS);
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cap->fip.fip_subcode = FIP_SC_REQ;
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cap->fip.fip_dl_len = htons((dlen + sizeof(*mac)) / FIP_BPW);
|
|
cap->fip.fip_flags = htons(fip_flags);
|
|
|
|
cap->encaps.fd_desc.fip_dtype = dtype;
|
|
cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW;
|
|
|
|
mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac));
|
|
memset(mac, 0, sizeof(mac));
|
|
mac->fd_desc.fip_dtype = FIP_DT_MAC;
|
|
mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW;
|
|
if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC)
|
|
memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
|
|
else if (fip->spma)
|
|
memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN);
|
|
|
|
skb->protocol = htons(ETH_P_FIP);
|
|
skb_reset_mac_header(skb);
|
|
skb_reset_network_header(skb);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate.
|
|
* @fip: FCoE controller.
|
|
* @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).
|
|
*/
|
|
int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct fc_frame_header *fh;
|
|
u16 old_xid;
|
|
u8 op;
|
|
u8 mac[ETH_ALEN];
|
|
|
|
fh = (struct fc_frame_header *)skb->data;
|
|
op = *(u8 *)(fh + 1);
|
|
|
|
if (op == ELS_FLOGI) {
|
|
old_xid = fip->flogi_oxid;
|
|
fip->flogi_oxid = ntohs(fh->fh_ox_id);
|
|
if (fip->state == FIP_ST_AUTO) {
|
|
if (old_xid == FC_XID_UNKNOWN)
|
|
fip->flogi_count = 0;
|
|
fip->flogi_count++;
|
|
if (fip->flogi_count < 3)
|
|
goto drop;
|
|
fip->map_dest = 1;
|
|
return 0;
|
|
}
|
|
if (fip->state == FIP_ST_NON_FIP)
|
|
fip->map_dest = 1;
|
|
}
|
|
|
|
if (fip->state == FIP_ST_NON_FIP)
|
|
return 0;
|
|
if (!fip->sel_fcf)
|
|
goto drop;
|
|
|
|
switch (op) {
|
|
case ELS_FLOGI:
|
|
op = FIP_DT_FLOGI;
|
|
break;
|
|
case ELS_FDISC:
|
|
if (ntoh24(fh->fh_s_id))
|
|
return 0;
|
|
op = FIP_DT_FDISC;
|
|
break;
|
|
case ELS_LOGO:
|
|
if (fip->state != FIP_ST_ENABLED)
|
|
return 0;
|
|
if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
|
|
return 0;
|
|
op = FIP_DT_LOGO;
|
|
break;
|
|
case ELS_LS_ACC:
|
|
if (fip->flogi_oxid == FC_XID_UNKNOWN)
|
|
return 0;
|
|
if (!ntoh24(fh->fh_s_id))
|
|
return 0;
|
|
if (fip->state == FIP_ST_AUTO)
|
|
return 0;
|
|
/*
|
|
* Here we must've gotten an SID by accepting an FLOGI
|
|
* from a point-to-point connection. Switch to using
|
|
* the source mac based on the SID. The destination
|
|
* MAC in this case would have been set by receving the
|
|
* FLOGI.
|
|
*/
|
|
fip->flogi_oxid = FC_XID_UNKNOWN;
|
|
fc_fcoe_set_mac(mac, fh->fh_d_id);
|
|
fip->update_mac(lport, mac);
|
|
return 0;
|
|
default:
|
|
if (fip->state != FIP_ST_ENABLED)
|
|
goto drop;
|
|
return 0;
|
|
}
|
|
if (fcoe_ctlr_encaps(fip, lport, op, skb))
|
|
goto drop;
|
|
fip->send(fip, skb);
|
|
return -EINPROGRESS;
|
|
drop:
|
|
kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
EXPORT_SYMBOL(fcoe_ctlr_els_send);
|
|
|
|
/**
|
|
* fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller
|
|
* @fip: The FCoE controller to free FCFs on
|
|
*
|
|
* Called with lock held.
|
|
*
|
|
* An FCF is considered old if we have missed three advertisements.
|
|
* That is, there have been no valid advertisement from it for three
|
|
* times its keep-alive period including fuzz.
|
|
*
|
|
* In addition, determine the time when an FCF selection can occur.
|
|
*
|
|
* Also, increment the MissDiscAdvCount when no advertisement is received
|
|
* for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB).
|
|
*/
|
|
static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
|
|
{
|
|
struct fcoe_fcf *fcf;
|
|
struct fcoe_fcf *next;
|
|
unsigned long sel_time = 0;
|
|
unsigned long mda_time = 0;
|
|
|
|
list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
|
|
mda_time = fcf->fka_period + (fcf->fka_period >> 1);
|
|
if ((fip->sel_fcf == fcf) &&
|
|
(time_after(jiffies, fcf->time + mda_time))) {
|
|
mod_timer(&fip->timer, jiffies + mda_time);
|
|
fc_lport_get_stats(fip->lp)->MissDiscAdvCount++;
|
|
printk(KERN_INFO "libfcoe: host%d: Missing Discovery "
|
|
"Advertisement for fab %llx count %lld\n",
|
|
fip->lp->host->host_no, fcf->fabric_name,
|
|
fc_lport_get_stats(fip->lp)->MissDiscAdvCount);
|
|
}
|
|
if (time_after(jiffies, fcf->time + fcf->fka_period * 3 +
|
|
msecs_to_jiffies(FIP_FCF_FUZZ * 3))) {
|
|
if (fip->sel_fcf == fcf)
|
|
fip->sel_fcf = NULL;
|
|
list_del(&fcf->list);
|
|
WARN_ON(!fip->fcf_count);
|
|
fip->fcf_count--;
|
|
kfree(fcf);
|
|
fc_lport_get_stats(fip->lp)->VLinkFailureCount++;
|
|
} else if (fcoe_ctlr_mtu_valid(fcf) &&
|
|
(!sel_time || time_before(sel_time, fcf->time))) {
|
|
sel_time = fcf->time;
|
|
}
|
|
}
|
|
if (sel_time) {
|
|
sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY);
|
|
fip->sel_time = sel_time;
|
|
if (time_before(sel_time, fip->timer.expires))
|
|
mod_timer(&fip->timer, sel_time);
|
|
} else {
|
|
fip->sel_time = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry
|
|
* @fip: The FCoE controller receiving the advertisement
|
|
* @skb: The received FIP advertisement frame
|
|
* @fcf: The resulting FCF entry
|
|
*
|
|
* Returns zero on a valid parsed advertisement,
|
|
* otherwise returns non zero value.
|
|
*/
|
|
static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip,
|
|
struct sk_buff *skb, struct fcoe_fcf *fcf)
|
|
{
|
|
struct fip_header *fiph;
|
|
struct fip_desc *desc = NULL;
|
|
struct fip_wwn_desc *wwn;
|
|
struct fip_fab_desc *fab;
|
|
struct fip_fka_desc *fka;
|
|
unsigned long t;
|
|
size_t rlen;
|
|
size_t dlen;
|
|
|
|
memset(fcf, 0, sizeof(*fcf));
|
|
fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA);
|
|
|
|
fiph = (struct fip_header *)skb->data;
|
|
fcf->flags = ntohs(fiph->fip_flags);
|
|
|
|
rlen = ntohs(fiph->fip_dl_len) * 4;
|
|
if (rlen + sizeof(*fiph) > skb->len)
|
|
return -EINVAL;
|
|
|
|
desc = (struct fip_desc *)(fiph + 1);
|
|
while (rlen > 0) {
|
|
dlen = desc->fip_dlen * FIP_BPW;
|
|
if (dlen < sizeof(*desc) || dlen > rlen)
|
|
return -EINVAL;
|
|
switch (desc->fip_dtype) {
|
|
case FIP_DT_PRI:
|
|
if (dlen != sizeof(struct fip_pri_desc))
|
|
goto len_err;
|
|
fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri;
|
|
break;
|
|
case FIP_DT_MAC:
|
|
if (dlen != sizeof(struct fip_mac_desc))
|
|
goto len_err;
|
|
memcpy(fcf->fcf_mac,
|
|
((struct fip_mac_desc *)desc)->fd_mac,
|
|
ETH_ALEN);
|
|
if (!is_valid_ether_addr(fcf->fcf_mac)) {
|
|
LIBFCOE_FIP_DBG(fip, "Invalid MAC address "
|
|
"in FIP adv\n");
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
case FIP_DT_NAME:
|
|
if (dlen != sizeof(struct fip_wwn_desc))
|
|
goto len_err;
|
|
wwn = (struct fip_wwn_desc *)desc;
|
|
fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn);
|
|
break;
|
|
case FIP_DT_FAB:
|
|
if (dlen != sizeof(struct fip_fab_desc))
|
|
goto len_err;
|
|
fab = (struct fip_fab_desc *)desc;
|
|
fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn);
|
|
fcf->vfid = ntohs(fab->fd_vfid);
|
|
fcf->fc_map = ntoh24(fab->fd_map);
|
|
break;
|
|
case FIP_DT_FKA:
|
|
if (dlen != sizeof(struct fip_fka_desc))
|
|
goto len_err;
|
|
fka = (struct fip_fka_desc *)desc;
|
|
if (fka->fd_flags & FIP_FKA_ADV_D)
|
|
fcf->fd_flags = 1;
|
|
t = ntohl(fka->fd_fka_period);
|
|
if (t >= FCOE_CTLR_MIN_FKA)
|
|
fcf->fka_period = msecs_to_jiffies(t);
|
|
break;
|
|
case FIP_DT_MAP_OUI:
|
|
case FIP_DT_FCOE_SIZE:
|
|
case FIP_DT_FLOGI:
|
|
case FIP_DT_FDISC:
|
|
case FIP_DT_LOGO:
|
|
case FIP_DT_ELP:
|
|
default:
|
|
LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
|
|
"in FIP adv\n", desc->fip_dtype);
|
|
/* standard says ignore unknown descriptors >= 128 */
|
|
if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
|
|
return -EINVAL;
|
|
continue;
|
|
}
|
|
desc = (struct fip_desc *)((char *)desc + dlen);
|
|
rlen -= dlen;
|
|
}
|
|
if (!fcf->fc_map || (fcf->fc_map & 0x10000))
|
|
return -EINVAL;
|
|
if (!fcf->switch_name || !fcf->fabric_name)
|
|
return -EINVAL;
|
|
return 0;
|
|
|
|
len_err:
|
|
LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
|
|
desc->fip_dtype, dlen);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_recv_adv() - Handle an incoming advertisement
|
|
* @fip: The FCoE controller receiving the advertisement
|
|
* @skb: The received FIP packet
|
|
*/
|
|
static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
|
|
{
|
|
struct fcoe_fcf *fcf;
|
|
struct fcoe_fcf new;
|
|
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;
|
|
|
|
spin_lock_bh(&fip->lock);
|
|
first = list_empty(&fip->fcfs);
|
|
found = NULL;
|
|
list_for_each_entry(fcf, &fip->fcfs, list) {
|
|
if (fcf->switch_name == new.switch_name &&
|
|
fcf->fabric_name == new.fabric_name &&
|
|
fcf->fc_map == new.fc_map &&
|
|
compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) {
|
|
found = fcf;
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT)
|
|
goto out;
|
|
|
|
fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC);
|
|
if (!fcf)
|
|
goto out;
|
|
|
|
fip->fcf_count++;
|
|
memcpy(fcf, &new, sizeof(new));
|
|
list_add(&fcf->list, &fip->fcfs);
|
|
} else {
|
|
/*
|
|
* Flags in advertisements are ignored once the FCF is
|
|
* selected. Flags in unsolicited advertisements are
|
|
* ignored after a usable solicited advertisement
|
|
* has been received.
|
|
*/
|
|
if (fcf == fip->sel_fcf) {
|
|
fip->ctlr_ka_time -= fcf->fka_period;
|
|
fip->ctlr_ka_time += new.fka_period;
|
|
if (time_before(fip->ctlr_ka_time, fip->timer.expires))
|
|
mod_timer(&fip->timer, fip->ctlr_ka_time);
|
|
} else if (!fcoe_ctlr_fcf_usable(fcf))
|
|
fcf->flags = new.flags;
|
|
fcf->fka_period = new.fka_period;
|
|
memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN);
|
|
}
|
|
mtu_valid = fcoe_ctlr_mtu_valid(fcf);
|
|
fcf->time = jiffies;
|
|
if (!found) {
|
|
LIBFCOE_FIP_DBG(fip, "New FCF for fab %llx map %x val %d\n",
|
|
fcf->fabric_name, fcf->fc_map, mtu_valid);
|
|
}
|
|
|
|
/*
|
|
* If this advertisement is not solicited and our max receive size
|
|
* hasn't been verified, send a solicited advertisement.
|
|
*/
|
|
if (!mtu_valid)
|
|
fcoe_ctlr_solicit(fip, fcf);
|
|
|
|
/*
|
|
* If its been a while since we did a solicit, and this is
|
|
* the first advertisement we've received, do a multicast
|
|
* solicitation to gather as many advertisements as we can
|
|
* before selection occurs.
|
|
*/
|
|
if (first && time_after(jiffies, fip->sol_time + sol_tov))
|
|
fcoe_ctlr_solicit(fip, NULL);
|
|
|
|
/*
|
|
* If this is the first validated FCF, note the time and
|
|
* set a timer to trigger selection.
|
|
*/
|
|
if (mtu_valid && !fip->sel_time && fcoe_ctlr_fcf_usable(fcf)) {
|
|
fip->sel_time = jiffies +
|
|
msecs_to_jiffies(FCOE_CTLR_START_DELAY);
|
|
if (!timer_pending(&fip->timer) ||
|
|
time_before(fip->sel_time, fip->timer.expires))
|
|
mod_timer(&fip->timer, fip->sel_time);
|
|
}
|
|
out:
|
|
spin_unlock_bh(&fip->lock);
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame
|
|
* @fip: The FCoE controller which received the packet
|
|
* @skb: The received FIP packet
|
|
*/
|
|
static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
|
|
{
|
|
struct fc_lport *lport = fip->lp;
|
|
struct fip_header *fiph;
|
|
struct fc_frame *fp = (struct fc_frame *)skb;
|
|
struct fc_frame_header *fh = NULL;
|
|
struct fip_desc *desc;
|
|
struct fip_encaps *els;
|
|
struct fcoe_dev_stats *stats;
|
|
enum fip_desc_type els_dtype = 0;
|
|
u8 els_op;
|
|
u8 sub;
|
|
u8 granted_mac[ETH_ALEN] = { 0 };
|
|
size_t els_len = 0;
|
|
size_t rlen;
|
|
size_t dlen;
|
|
|
|
fiph = (struct fip_header *)skb->data;
|
|
sub = fiph->fip_subcode;
|
|
if (sub != FIP_SC_REQ && sub != FIP_SC_REP)
|
|
goto drop;
|
|
|
|
rlen = ntohs(fiph->fip_dl_len) * 4;
|
|
if (rlen + sizeof(*fiph) > skb->len)
|
|
goto drop;
|
|
|
|
desc = (struct fip_desc *)(fiph + 1);
|
|
while (rlen > 0) {
|
|
dlen = desc->fip_dlen * FIP_BPW;
|
|
if (dlen < sizeof(*desc) || dlen > rlen)
|
|
goto drop;
|
|
switch (desc->fip_dtype) {
|
|
case FIP_DT_MAC:
|
|
if (dlen != sizeof(struct fip_mac_desc))
|
|
goto len_err;
|
|
memcpy(granted_mac,
|
|
((struct fip_mac_desc *)desc)->fd_mac,
|
|
ETH_ALEN);
|
|
if (!is_valid_ether_addr(granted_mac)) {
|
|
LIBFCOE_FIP_DBG(fip, "Invalid MAC address "
|
|
"in FIP ELS\n");
|
|
goto drop;
|
|
}
|
|
memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN);
|
|
break;
|
|
case FIP_DT_FLOGI:
|
|
case FIP_DT_FDISC:
|
|
case FIP_DT_LOGO:
|
|
case FIP_DT_ELP:
|
|
if (fh)
|
|
goto drop;
|
|
if (dlen < sizeof(*els) + sizeof(*fh) + 1)
|
|
goto len_err;
|
|
els_len = dlen - sizeof(*els);
|
|
els = (struct fip_encaps *)desc;
|
|
fh = (struct fc_frame_header *)(els + 1);
|
|
els_dtype = desc->fip_dtype;
|
|
break;
|
|
default:
|
|
LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
|
|
"in FIP adv\n", desc->fip_dtype);
|
|
/* standard says ignore unknown descriptors >= 128 */
|
|
if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
|
|
goto drop;
|
|
continue;
|
|
}
|
|
desc = (struct fip_desc *)((char *)desc + dlen);
|
|
rlen -= dlen;
|
|
}
|
|
|
|
if (!fh)
|
|
goto drop;
|
|
els_op = *(u8 *)(fh + 1);
|
|
|
|
if (els_dtype == FIP_DT_FLOGI && sub == FIP_SC_REP &&
|
|
fip->flogi_oxid == ntohs(fh->fh_ox_id) &&
|
|
els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac))
|
|
fip->flogi_oxid = FC_XID_UNKNOWN;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
stats = fc_lport_get_stats(lport);
|
|
stats->RxFrames++;
|
|
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_els() - Handle an incoming link reset frame
|
|
* @fip: The FCoE controller that received the frame
|
|
* @fh: The received FIP header
|
|
*
|
|
* There may be multiple VN_Port descriptors.
|
|
* The overall length has already been checked.
|
|
*/
|
|
static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
|
|
struct fip_header *fh)
|
|
{
|
|
struct fip_desc *desc;
|
|
struct fip_mac_desc *mp;
|
|
struct fip_wwn_desc *wp;
|
|
struct fip_vn_desc *vp;
|
|
size_t rlen;
|
|
size_t dlen;
|
|
struct fcoe_fcf *fcf = fip->sel_fcf;
|
|
struct fc_lport *lport = fip->lp;
|
|
u32 desc_mask;
|
|
|
|
LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
|
|
if (!fcf)
|
|
return;
|
|
if (!fcf || !fc_host_port_id(lport->host))
|
|
return;
|
|
|
|
/*
|
|
* mask of required descriptors. Validating each one clears its bit.
|
|
*/
|
|
desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID);
|
|
|
|
rlen = ntohs(fh->fip_dl_len) * FIP_BPW;
|
|
desc = (struct fip_desc *)(fh + 1);
|
|
while (rlen >= sizeof(*desc)) {
|
|
dlen = desc->fip_dlen * FIP_BPW;
|
|
if (dlen > rlen)
|
|
return;
|
|
switch (desc->fip_dtype) {
|
|
case FIP_DT_MAC:
|
|
mp = (struct fip_mac_desc *)desc;
|
|
if (dlen < sizeof(*mp))
|
|
return;
|
|
if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac))
|
|
return;
|
|
desc_mask &= ~BIT(FIP_DT_MAC);
|
|
break;
|
|
case FIP_DT_NAME:
|
|
wp = (struct fip_wwn_desc *)desc;
|
|
if (dlen < sizeof(*wp))
|
|
return;
|
|
if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name)
|
|
return;
|
|
desc_mask &= ~BIT(FIP_DT_NAME);
|
|
break;
|
|
case FIP_DT_VN_ID:
|
|
vp = (struct fip_vn_desc *)desc;
|
|
if (dlen < sizeof(*vp))
|
|
return;
|
|
if (compare_ether_addr(vp->fd_mac,
|
|
fip->get_src_addr(lport)) == 0 &&
|
|
get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn &&
|
|
ntoh24(vp->fd_fc_id) ==
|
|
fc_host_port_id(lport->host))
|
|
desc_mask &= ~BIT(FIP_DT_VN_ID);
|
|
break;
|
|
default:
|
|
/* standard says ignore unknown descriptors >= 128 */
|
|
if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
|
|
return;
|
|
break;
|
|
}
|
|
desc = (struct fip_desc *)((char *)desc + dlen);
|
|
rlen -= dlen;
|
|
}
|
|
|
|
/*
|
|
* reset only if all required descriptors were present and valid.
|
|
*/
|
|
if (desc_mask) {
|
|
LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n",
|
|
desc_mask);
|
|
} else {
|
|
LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n");
|
|
|
|
spin_lock_bh(&fip->lock);
|
|
fc_lport_get_stats(lport)->VLinkFailureCount++;
|
|
fcoe_ctlr_reset(fip);
|
|
spin_unlock_bh(&fip->lock);
|
|
|
|
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 (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) &&
|
|
compare_ether_addr(eh->h_dest, FIP_ALL_ENODE_MACS))
|
|
goto drop;
|
|
fiph = (struct fip_header *)skb->data;
|
|
op = ntohs(fiph->fip_op);
|
|
sub = fiph->fip_subcode;
|
|
|
|
if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
|
|
goto drop;
|
|
if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
|
|
goto drop;
|
|
|
|
spin_lock_bh(&fip->lock);
|
|
state = fip->state;
|
|
if (state == FIP_ST_AUTO) {
|
|
fip->map_dest = 0;
|
|
fip->state = FIP_ST_ENABLED;
|
|
state = FIP_ST_ENABLED;
|
|
LIBFCOE_FIP_DBG(fip, "Using FIP mode\n");
|
|
}
|
|
spin_unlock_bh(&fip->lock);
|
|
if (state != FIP_ST_ENABLED)
|
|
goto drop;
|
|
|
|
if (op == FIP_OP_LS) {
|
|
fcoe_ctlr_recv_els(fip, skb); /* consumes skb */
|
|
return 0;
|
|
}
|
|
if (op == FIP_OP_DISC && sub == FIP_SC_ADV)
|
|
fcoe_ctlr_recv_adv(fip, skb);
|
|
else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK)
|
|
fcoe_ctlr_recv_clr_vlink(fip, fiph);
|
|
kfree_skb(skb);
|
|
return 0;
|
|
drop:
|
|
kfree_skb(skb);
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_select() - Select the best FCF (if possible)
|
|
* @fip: The FCoE controller
|
|
*
|
|
* If there are conflicting advertisements, no FCF can be chosen.
|
|
*
|
|
* Called with lock held.
|
|
*/
|
|
static void fcoe_ctlr_select(struct fcoe_ctlr *fip)
|
|
{
|
|
struct fcoe_fcf *fcf;
|
|
struct fcoe_fcf *best = NULL;
|
|
|
|
list_for_each_entry(fcf, &fip->fcfs, list) {
|
|
LIBFCOE_FIP_DBG(fip, "consider FCF for fab %llx VFID %d map %x "
|
|
"val %d\n", fcf->fabric_name, fcf->vfid,
|
|
fcf->fc_map, fcoe_ctlr_mtu_valid(fcf));
|
|
if (!fcoe_ctlr_fcf_usable(fcf)) {
|
|
LIBFCOE_FIP_DBG(fip, "FCF for fab %llx map %x %svalid "
|
|
"%savailable\n", fcf->fabric_name,
|
|
fcf->fc_map, (fcf->flags & FIP_FL_SOL)
|
|
? "" : "in", (fcf->flags & FIP_FL_AVAIL)
|
|
? "" : "un");
|
|
continue;
|
|
}
|
|
if (!best) {
|
|
best = fcf;
|
|
continue;
|
|
}
|
|
if (fcf->fabric_name != best->fabric_name ||
|
|
fcf->vfid != best->vfid ||
|
|
fcf->fc_map != best->fc_map) {
|
|
LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, "
|
|
"or FC-MAP\n");
|
|
return;
|
|
}
|
|
if (fcf->pri < best->pri)
|
|
best = fcf;
|
|
}
|
|
fip->sel_fcf = best;
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_timeout() - FIP timeout handler
|
|
* @arg: The FCoE controller that timed out
|
|
*
|
|
* Ages FCFs. Triggers FCF selection if possible. Sends keep-alives.
|
|
*/
|
|
static void fcoe_ctlr_timeout(unsigned long arg)
|
|
{
|
|
struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg;
|
|
struct fcoe_fcf *sel;
|
|
struct fcoe_fcf *fcf;
|
|
unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
|
|
|
|
spin_lock_bh(&fip->lock);
|
|
if (fip->state == FIP_ST_DISABLED) {
|
|
spin_unlock_bh(&fip->lock);
|
|
return;
|
|
}
|
|
|
|
fcf = fip->sel_fcf;
|
|
fcoe_ctlr_age_fcfs(fip);
|
|
|
|
sel = fip->sel_fcf;
|
|
if (!sel && fip->sel_time && time_after_eq(jiffies, fip->sel_time)) {
|
|
fcoe_ctlr_select(fip);
|
|
sel = fip->sel_fcf;
|
|
fip->sel_time = 0;
|
|
}
|
|
|
|
if (sel != fcf) {
|
|
fcf = sel; /* the old FCF may have been freed */
|
|
if (sel) {
|
|
printk(KERN_INFO "libfcoe: host%d: FIP selected "
|
|
"Fibre-Channel Forwarder MAC %pM\n",
|
|
fip->lp->host->host_no, sel->fcf_mac);
|
|
memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN);
|
|
fip->port_ka_time = jiffies +
|
|
msecs_to_jiffies(FIP_VN_KA_PERIOD);
|
|
fip->ctlr_ka_time = jiffies + sel->fka_period;
|
|
} else {
|
|
printk(KERN_NOTICE "libfcoe: host%d: "
|
|
"FIP Fibre-Channel Forwarder timed out. "
|
|
"Starting FCF discovery.\n",
|
|
fip->lp->host->host_no);
|
|
fip->reset_req = 1;
|
|
schedule_work(&fip->link_work);
|
|
}
|
|
}
|
|
|
|
if (sel && !sel->fd_flags) {
|
|
if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
|
|
fip->ctlr_ka_time = jiffies + sel->fka_period;
|
|
fip->send_ctlr_ka = 1;
|
|
}
|
|
if (time_after(next_timer, fip->ctlr_ka_time))
|
|
next_timer = fip->ctlr_ka_time;
|
|
|
|
if (time_after_eq(jiffies, fip->port_ka_time)) {
|
|
fip->port_ka_time = jiffies +
|
|
msecs_to_jiffies(FIP_VN_KA_PERIOD);
|
|
fip->send_port_ka = 1;
|
|
}
|
|
if (time_after(next_timer, fip->port_ka_time))
|
|
next_timer = fip->port_ka_time;
|
|
mod_timer(&fip->timer, next_timer);
|
|
} else if (fip->sel_time) {
|
|
next_timer = fip->sel_time +
|
|
msecs_to_jiffies(FCOE_CTLR_START_DELAY);
|
|
mod_timer(&fip->timer, next_timer);
|
|
}
|
|
if (fip->send_ctlr_ka || fip->send_port_ka)
|
|
schedule_work(&fip->link_work);
|
|
spin_unlock_bh(&fip->lock);
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_link_work() - Worker thread function for link changes
|
|
* @work: Handle to a FCoE controller
|
|
*
|
|
* See if the link status has changed and if so, report it.
|
|
*
|
|
* This is here because fc_linkup() and fc_linkdown() must not
|
|
* be called from the timer directly, since they use a mutex.
|
|
*/
|
|
static void fcoe_ctlr_link_work(struct work_struct *work)
|
|
{
|
|
struct fcoe_ctlr *fip;
|
|
struct fc_lport *vport;
|
|
u8 *mac;
|
|
int link;
|
|
int last_link;
|
|
int reset;
|
|
|
|
fip = container_of(work, struct fcoe_ctlr, link_work);
|
|
spin_lock_bh(&fip->lock);
|
|
last_link = fip->last_link;
|
|
link = fip->link;
|
|
fip->last_link = link;
|
|
reset = fip->reset_req;
|
|
fip->reset_req = 0;
|
|
spin_unlock_bh(&fip->lock);
|
|
|
|
if (last_link != link) {
|
|
if (link)
|
|
fc_linkup(fip->lp);
|
|
else
|
|
fc_linkdown(fip->lp);
|
|
} else if (reset && link)
|
|
fc_lport_reset(fip->lp);
|
|
|
|
if (fip->send_ctlr_ka) {
|
|
fip->send_ctlr_ka = 0;
|
|
fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
|
|
}
|
|
if (fip->send_port_ka) {
|
|
fip->send_port_ka = 0;
|
|
mutex_lock(&fip->lp->lp_mutex);
|
|
mac = fip->get_src_addr(fip->lp);
|
|
fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac);
|
|
list_for_each_entry(vport, &fip->lp->vports, list) {
|
|
mac = fip->get_src_addr(vport);
|
|
fcoe_ctlr_send_keep_alive(fip, vport, 1, mac);
|
|
}
|
|
mutex_unlock(&fip->lp->lp_mutex);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames
|
|
* @recv_work: Handle to a FCoE controller
|
|
*/
|
|
static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
|
|
{
|
|
struct fcoe_ctlr *fip;
|
|
struct sk_buff *skb;
|
|
|
|
fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
|
|
while ((skb = skb_dequeue(&fip->fip_recv_list)))
|
|
fcoe_ctlr_recv_handler(fip, skb);
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response
|
|
* @fip: The FCoE controller
|
|
* @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)) {
|
|
|
|
spin_lock_bh(&fip->lock);
|
|
if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
|
|
spin_unlock_bh(&fip->lock);
|
|
return -EINVAL;
|
|
}
|
|
fip->state = FIP_ST_NON_FIP;
|
|
LIBFCOE_FIP_DBG(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)) {
|
|
fip->map_dest = 1;
|
|
} else {
|
|
memcpy(fip->dest_addr, sa, ETH_ALEN);
|
|
fip->map_dest = 0;
|
|
}
|
|
fip->flogi_oxid = FC_XID_UNKNOWN;
|
|
spin_unlock_bh(&fip->lock);
|
|
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.
|
|
*/
|
|
spin_lock_bh(&fip->lock);
|
|
if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) {
|
|
memcpy(fip->dest_addr, sa, ETH_ALEN);
|
|
fip->map_dest = 0;
|
|
if (fip->state == FIP_ST_NON_FIP)
|
|
LIBFCOE_FIP_DBG(fip, "received FLOGI REQ, "
|
|
"using non-FIP mode\n");
|
|
fip->state = FIP_ST_NON_FIP;
|
|
}
|
|
spin_unlock_bh(&fip->lock);
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
|
|
|
|
/**
|
|
* fcoe_wwn_from_mac() - Converts 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_libfc_config() - Sets up libfc related properties for local port
|
|
* @lp: The local port to configure libfc for
|
|
* @tt: The libfc function template
|
|
*
|
|
* Returns : 0 for success
|
|
*/
|
|
int fcoe_libfc_config(struct fc_lport *lport,
|
|
struct libfc_function_template *tt)
|
|
{
|
|
/* Set the function pointers set by the LLDD */
|
|
memcpy(&lport->tt, tt, sizeof(*tt));
|
|
if (fc_fcp_init(lport))
|
|
return -ENOMEM;
|
|
fc_exch_init(lport);
|
|
fc_elsct_init(lport);
|
|
fc_lport_init(lport);
|
|
fc_rport_init(lport);
|
|
fc_disc_init(lport);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(fcoe_libfc_config);
|
|
|