73f2233d9d
by restoring the ifv_proto field in the vlan softc and putting it to use this time. It's a good companion for ifv_encaplen, which has already been used throughout this driver.
1489 lines
38 KiB
C
1489 lines
38 KiB
C
/*-
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* Copyright 1998 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* if_vlan.c - pseudo-device driver for IEEE 802.1Q virtual LANs.
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* Might be extended some day to also handle IEEE 802.1p priority
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* tagging. This is sort of sneaky in the implementation, since
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* we need to pretend to be enough of an Ethernet implementation
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* to make arp work. The way we do this is by telling everyone
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* that we are an Ethernet, and then catch the packets that
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* ether_output() left on our output queue when it calls
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* if_start(), rewrite them for use by the real outgoing interface,
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* and ask it to send them.
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*/
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#include "opt_inet.h"
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#include "opt_vlan.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/rwlock.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <net/bpf.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_clone.h>
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#include <net/if_arp.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/if_vlan_var.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#endif
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#define VLANNAME "vlan"
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#define VLAN_DEF_HWIDTH 4
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#define VLAN_IFFLAGS (IFF_BROADCAST | IFF_MULTICAST)
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LIST_HEAD(ifvlanhead, ifvlan);
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struct ifvlantrunk {
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struct ifnet *parent; /* parent interface of this trunk */
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struct rwlock rw;
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#ifdef VLAN_ARRAY
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#define VLAN_ARRAY_SIZE (EVL_VLID_MASK + 1)
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struct ifvlan *vlans[VLAN_ARRAY_SIZE]; /* static table */
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#else
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struct ifvlanhead *hash; /* dynamic hash-list table */
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uint16_t hmask;
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uint16_t hwidth;
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#endif
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int refcnt;
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LIST_ENTRY(ifvlantrunk) trunk_entry;
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};
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static LIST_HEAD(, ifvlantrunk) trunk_list;
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struct vlan_mc_entry {
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struct ether_addr mc_addr;
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SLIST_ENTRY(vlan_mc_entry) mc_entries;
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};
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struct ifvlan {
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struct ifvlantrunk *ifv_trunk;
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struct ifnet *ifv_ifp;
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#define TRUNK(ifv) ((ifv)->ifv_trunk)
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#define PARENT(ifv) ((ifv)->ifv_trunk->parent)
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int ifv_pflags; /* special flags we have set on parent */
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struct ifv_linkmib {
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int ifvm_encaplen; /* encapsulation length */
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int ifvm_mtufudge; /* MTU fudged by this much */
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int ifvm_mintu; /* min transmission unit */
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uint16_t ifvm_proto; /* encapsulation ethertype */
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uint16_t ifvm_tag; /* tag to apply on packets leaving if */
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} ifv_mib;
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SLIST_HEAD(, vlan_mc_entry) vlan_mc_listhead;
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LIST_ENTRY(ifvlan) ifv_list;
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};
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#define ifv_proto ifv_mib.ifvm_proto
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#define ifv_tag ifv_mib.ifvm_tag
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#define ifv_encaplen ifv_mib.ifvm_encaplen
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#define ifv_mtufudge ifv_mib.ifvm_mtufudge
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#define ifv_mintu ifv_mib.ifvm_mintu
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/* Special flags we should propagate to parent. */
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static struct {
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int flag;
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int (*func)(struct ifnet *, int);
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} vlan_pflags[] = {
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{IFF_PROMISC, ifpromisc},
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{IFF_ALLMULTI, if_allmulti},
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{0, NULL}
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};
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SYSCTL_DECL(_net_link);
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SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN");
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SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency");
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static int soft_pad = 0;
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SYSCTL_INT(_net_link_vlan, OID_AUTO, soft_pad, CTLFLAG_RW, &soft_pad, 0,
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"pad short frames before tagging");
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static MALLOC_DEFINE(M_VLAN, VLANNAME, "802.1Q Virtual LAN Interface");
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static eventhandler_tag ifdetach_tag;
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/*
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* We have a global mutex, that is used to serialize configuration
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* changes and isn't used in normal packet delivery.
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*
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* We also have a per-trunk rwlock, that is locked shared on packet
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* processing and exclusive when configuration is changed.
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*
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* The VLAN_ARRAY substitutes the dynamic hash with a static array
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* with 4096 entries. In theory this can give a boots in processing,
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* however on practice it does not. Probably this is because array
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* is too big to fit into CPU cache.
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*/
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static struct mtx ifv_mtx;
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#define VLAN_LOCK_INIT() mtx_init(&ifv_mtx, "vlan_global", NULL, MTX_DEF)
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#define VLAN_LOCK_DESTROY() mtx_destroy(&ifv_mtx)
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#define VLAN_LOCK_ASSERT() mtx_assert(&ifv_mtx, MA_OWNED)
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#define VLAN_LOCK() mtx_lock(&ifv_mtx)
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#define VLAN_UNLOCK() mtx_unlock(&ifv_mtx)
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#define TRUNK_LOCK_INIT(trunk) rw_init(&(trunk)->rw, VLANNAME)
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#define TRUNK_LOCK_DESTROY(trunk) rw_destroy(&(trunk)->rw)
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#define TRUNK_LOCK(trunk) rw_wlock(&(trunk)->rw)
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#define TRUNK_UNLOCK(trunk) rw_wunlock(&(trunk)->rw)
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#define TRUNK_LOCK_ASSERT(trunk) rw_assert(&(trunk)->rw, RA_WLOCKED)
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#define TRUNK_RLOCK(trunk) rw_rlock(&(trunk)->rw)
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#define TRUNK_RUNLOCK(trunk) rw_runlock(&(trunk)->rw)
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#define TRUNK_LOCK_RASSERT(trunk) rw_assert(&(trunk)->rw, RA_RLOCKED)
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#ifndef VLAN_ARRAY
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static void vlan_inithash(struct ifvlantrunk *trunk);
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static void vlan_freehash(struct ifvlantrunk *trunk);
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static int vlan_inshash(struct ifvlantrunk *trunk, struct ifvlan *ifv);
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static int vlan_remhash(struct ifvlantrunk *trunk, struct ifvlan *ifv);
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static void vlan_growhash(struct ifvlantrunk *trunk, int howmuch);
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static __inline struct ifvlan * vlan_gethash(struct ifvlantrunk *trunk,
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uint16_t tag);
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#endif
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static void trunk_destroy(struct ifvlantrunk *trunk);
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static void vlan_start(struct ifnet *ifp);
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static void vlan_init(void *foo);
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static void vlan_input(struct ifnet *ifp, struct mbuf *m);
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static int vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr);
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static int vlan_setflag(struct ifnet *ifp, int flag, int status,
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int (*func)(struct ifnet *, int));
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static int vlan_setflags(struct ifnet *ifp, int status);
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static int vlan_setmulti(struct ifnet *ifp);
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static int vlan_unconfig(struct ifnet *ifp);
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static int vlan_unconfig_locked(struct ifnet *ifp);
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static int vlan_config(struct ifvlan *ifv, struct ifnet *p, uint16_t tag);
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static void vlan_link_state(struct ifnet *ifp, int link);
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static void vlan_capabilities(struct ifvlan *ifv);
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static void vlan_trunk_capabilities(struct ifnet *ifp);
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static struct ifnet *vlan_clone_match_ethertag(struct if_clone *,
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const char *, int *);
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static int vlan_clone_match(struct if_clone *, const char *);
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static int vlan_clone_create(struct if_clone *, char *, size_t, caddr_t);
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static int vlan_clone_destroy(struct if_clone *, struct ifnet *);
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static void vlan_ifdetach(void *arg, struct ifnet *ifp);
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static struct if_clone vlan_cloner = IFC_CLONE_INITIALIZER(VLANNAME, NULL,
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IF_MAXUNIT, NULL, vlan_clone_match, vlan_clone_create, vlan_clone_destroy);
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#ifndef VLAN_ARRAY
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#define HASH(n, m) ((((n) >> 8) ^ ((n) >> 4) ^ (n)) & (m))
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static void
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vlan_inithash(struct ifvlantrunk *trunk)
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{
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int i, n;
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/*
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* The trunk must not be locked here since we call malloc(M_WAITOK).
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* It is OK in case this function is called before the trunk struct
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* gets hooked up and becomes visible from other threads.
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*/
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KASSERT(trunk->hwidth == 0 && trunk->hash == NULL,
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("%s: hash already initialized", __func__));
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trunk->hwidth = VLAN_DEF_HWIDTH;
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n = 1 << trunk->hwidth;
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trunk->hmask = n - 1;
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trunk->hash = malloc(sizeof(struct ifvlanhead) * n, M_VLAN, M_WAITOK);
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for (i = 0; i < n; i++)
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LIST_INIT(&trunk->hash[i]);
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}
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static void
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vlan_freehash(struct ifvlantrunk *trunk)
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{
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#ifdef INVARIANTS
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int i;
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KASSERT(trunk->hwidth > 0, ("%s: hwidth not positive", __func__));
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for (i = 0; i < (1 << trunk->hwidth); i++)
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KASSERT(LIST_EMPTY(&trunk->hash[i]),
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("%s: hash table not empty", __func__));
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#endif
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free(trunk->hash, M_VLAN);
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trunk->hash = NULL;
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trunk->hwidth = trunk->hmask = 0;
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}
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static int
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vlan_inshash(struct ifvlantrunk *trunk, struct ifvlan *ifv)
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{
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int i, b;
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struct ifvlan *ifv2;
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TRUNK_LOCK_ASSERT(trunk);
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KASSERT(trunk->hwidth > 0, ("%s: hwidth not positive", __func__));
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b = 1 << trunk->hwidth;
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i = HASH(ifv->ifv_tag, trunk->hmask);
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LIST_FOREACH(ifv2, &trunk->hash[i], ifv_list)
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if (ifv->ifv_tag == ifv2->ifv_tag)
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return (EEXIST);
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/*
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* Grow the hash when the number of vlans exceeds half of the number of
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* hash buckets squared. This will make the average linked-list length
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* buckets/2.
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*/
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if (trunk->refcnt > (b * b) / 2) {
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vlan_growhash(trunk, 1);
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i = HASH(ifv->ifv_tag, trunk->hmask);
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}
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LIST_INSERT_HEAD(&trunk->hash[i], ifv, ifv_list);
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trunk->refcnt++;
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return (0);
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}
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static int
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vlan_remhash(struct ifvlantrunk *trunk, struct ifvlan *ifv)
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{
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int i, b;
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struct ifvlan *ifv2;
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TRUNK_LOCK_ASSERT(trunk);
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KASSERT(trunk->hwidth > 0, ("%s: hwidth not positive", __func__));
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b = 1 << trunk->hwidth;
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i = HASH(ifv->ifv_tag, trunk->hmask);
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LIST_FOREACH(ifv2, &trunk->hash[i], ifv_list)
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if (ifv2 == ifv) {
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trunk->refcnt--;
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LIST_REMOVE(ifv2, ifv_list);
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if (trunk->refcnt < (b * b) / 2)
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vlan_growhash(trunk, -1);
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return (0);
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}
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panic("%s: vlan not found\n", __func__);
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return (ENOENT); /*NOTREACHED*/
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}
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|
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/*
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* Grow the hash larger or smaller if memory permits.
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*/
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static void
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vlan_growhash(struct ifvlantrunk *trunk, int howmuch)
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{
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struct ifvlan *ifv;
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struct ifvlanhead *hash2;
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int hwidth2, i, j, n, n2;
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TRUNK_LOCK_ASSERT(trunk);
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KASSERT(trunk->hwidth > 0, ("%s: hwidth not positive", __func__));
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if (howmuch == 0) {
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/* Harmless yet obvious coding error */
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printf("%s: howmuch is 0\n", __func__);
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return;
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}
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hwidth2 = trunk->hwidth + howmuch;
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n = 1 << trunk->hwidth;
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n2 = 1 << hwidth2;
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/* Do not shrink the table below the default */
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if (hwidth2 < VLAN_DEF_HWIDTH)
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return;
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|
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/* M_NOWAIT because we're called with trunk mutex held */
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hash2 = malloc(sizeof(struct ifvlanhead) * n2, M_VLAN, M_NOWAIT);
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if (hash2 == NULL) {
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printf("%s: out of memory -- hash size not changed\n",
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__func__);
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return; /* We can live with the old hash table */
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}
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for (j = 0; j < n2; j++)
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LIST_INIT(&hash2[j]);
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for (i = 0; i < n; i++)
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while (!LIST_EMPTY(&trunk->hash[i])) {
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ifv = LIST_FIRST(&trunk->hash[i]);
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LIST_REMOVE(ifv, ifv_list);
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j = HASH(ifv->ifv_tag, n2 - 1);
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LIST_INSERT_HEAD(&hash2[j], ifv, ifv_list);
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}
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free(trunk->hash, M_VLAN);
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trunk->hash = hash2;
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trunk->hwidth = hwidth2;
|
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trunk->hmask = n2 - 1;
|
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}
|
|
|
|
static __inline struct ifvlan *
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vlan_gethash(struct ifvlantrunk *trunk, uint16_t tag)
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{
|
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struct ifvlan *ifv;
|
|
|
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TRUNK_LOCK_RASSERT(trunk);
|
|
|
|
LIST_FOREACH(ifv, &trunk->hash[HASH(tag, trunk->hmask)], ifv_list)
|
|
if (ifv->ifv_tag == tag)
|
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return (ifv);
|
|
return (NULL);
|
|
}
|
|
|
|
#if 0
|
|
/* Debugging code to view the hashtables. */
|
|
static void
|
|
vlan_dumphash(struct ifvlantrunk *trunk)
|
|
{
|
|
int i;
|
|
struct ifvlan *ifv;
|
|
|
|
for (i = 0; i < (1 << trunk->hwidth); i++) {
|
|
printf("%d: ", i);
|
|
LIST_FOREACH(ifv, &trunk->hash[i], ifv_list)
|
|
printf("%s ", ifv->ifv_ifp->if_xname);
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|
printf("\n");
|
|
}
|
|
}
|
|
#endif /* 0 */
|
|
#endif /* !VLAN_ARRAY */
|
|
|
|
static void
|
|
trunk_destroy(struct ifvlantrunk *trunk)
|
|
{
|
|
VLAN_LOCK_ASSERT();
|
|
|
|
TRUNK_LOCK(trunk);
|
|
#ifndef VLAN_ARRAY
|
|
vlan_freehash(trunk);
|
|
#endif
|
|
trunk->parent->if_vlantrunk = NULL;
|
|
LIST_REMOVE(trunk, trunk_entry);
|
|
TRUNK_UNLOCK(trunk);
|
|
TRUNK_LOCK_DESTROY(trunk);
|
|
free(trunk, M_VLAN);
|
|
}
|
|
|
|
/*
|
|
* Program our multicast filter. What we're actually doing is
|
|
* programming the multicast filter of the parent. This has the
|
|
* side effect of causing the parent interface to receive multicast
|
|
* traffic that it doesn't really want, which ends up being discarded
|
|
* later by the upper protocol layers. Unfortunately, there's no way
|
|
* to avoid this: there really is only one physical interface.
|
|
*
|
|
* XXX: There is a possible race here if more than one thread is
|
|
* modifying the multicast state of the vlan interface at the same time.
|
|
*/
|
|
static int
|
|
vlan_setmulti(struct ifnet *ifp)
|
|
{
|
|
struct ifnet *ifp_p;
|
|
struct ifmultiaddr *ifma, *rifma = NULL;
|
|
struct ifvlan *sc;
|
|
struct vlan_mc_entry *mc = NULL;
|
|
struct sockaddr_dl sdl;
|
|
int error;
|
|
|
|
/*VLAN_LOCK_ASSERT();*/
|
|
|
|
/* Find the parent. */
|
|
sc = ifp->if_softc;
|
|
ifp_p = PARENT(sc);
|
|
|
|
bzero((char *)&sdl, sizeof(sdl));
|
|
sdl.sdl_len = sizeof(sdl);
|
|
sdl.sdl_family = AF_LINK;
|
|
sdl.sdl_index = ifp_p->if_index;
|
|
sdl.sdl_type = IFT_ETHER;
|
|
sdl.sdl_alen = ETHER_ADDR_LEN;
|
|
|
|
/* First, remove any existing filter entries. */
|
|
while (SLIST_FIRST(&sc->vlan_mc_listhead) != NULL) {
|
|
mc = SLIST_FIRST(&sc->vlan_mc_listhead);
|
|
bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN);
|
|
error = if_delmulti(ifp_p, (struct sockaddr *)&sdl);
|
|
if (error)
|
|
return (error);
|
|
SLIST_REMOVE_HEAD(&sc->vlan_mc_listhead, mc_entries);
|
|
free(mc, M_VLAN);
|
|
}
|
|
|
|
/* Now program new ones. */
|
|
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
|
|
if (ifma->ifma_addr->sa_family != AF_LINK)
|
|
continue;
|
|
mc = malloc(sizeof(struct vlan_mc_entry), M_VLAN, M_NOWAIT);
|
|
if (mc == NULL)
|
|
return (ENOMEM);
|
|
bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
|
|
(char *)&mc->mc_addr, ETHER_ADDR_LEN);
|
|
SLIST_INSERT_HEAD(&sc->vlan_mc_listhead, mc, mc_entries);
|
|
bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
|
|
LLADDR(&sdl), ETHER_ADDR_LEN);
|
|
error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* A handler for network interface departure events.
|
|
* Track departure of trunks here so that we don't access invalid
|
|
* pointers or whatever if a trunk is ripped from under us, e.g.,
|
|
* by ejecting its hot-plug card.
|
|
*/
|
|
static void
|
|
vlan_ifdetach(void *arg __unused, struct ifnet *ifp)
|
|
{
|
|
struct ifvlan *ifv;
|
|
int i;
|
|
|
|
/*
|
|
* Check if it's a trunk interface first of all
|
|
* to avoid needless locking.
|
|
*/
|
|
if (ifp->if_vlantrunk == NULL)
|
|
return;
|
|
|
|
VLAN_LOCK();
|
|
/*
|
|
* OK, it's a trunk. Loop over and detach all vlan's on it.
|
|
* Check trunk pointer after each vlan_unconfig() as it will
|
|
* free it and set to NULL after the last vlan was detached.
|
|
*/
|
|
#ifdef VLAN_ARRAY
|
|
for (i = 0; i < VLAN_ARRAY_SIZE; i++)
|
|
if ((ifv = ifp->if_vlantrunk->vlans[i])) {
|
|
vlan_unconfig_locked(ifv->ifv_ifp);
|
|
if (ifp->if_vlantrunk == NULL)
|
|
break;
|
|
}
|
|
#else /* VLAN_ARRAY */
|
|
restart:
|
|
for (i = 0; i < (1 << ifp->if_vlantrunk->hwidth); i++)
|
|
if ((ifv = LIST_FIRST(&ifp->if_vlantrunk->hash[i]))) {
|
|
vlan_unconfig_locked(ifv->ifv_ifp);
|
|
if (ifp->if_vlantrunk)
|
|
goto restart; /* trunk->hwidth can change */
|
|
else
|
|
break;
|
|
}
|
|
#endif /* VLAN_ARRAY */
|
|
/* Trunk should have been destroyed in vlan_unconfig(). */
|
|
KASSERT(ifp->if_vlantrunk == NULL, ("%s: purge failed", __func__));
|
|
VLAN_UNLOCK();
|
|
}
|
|
|
|
/*
|
|
* VLAN support can be loaded as a module. The only place in the
|
|
* system that's intimately aware of this is ether_input. We hook
|
|
* into this code through vlan_input_p which is defined there and
|
|
* set here. Noone else in the system should be aware of this so
|
|
* we use an explicit reference here.
|
|
*/
|
|
extern void (*vlan_input_p)(struct ifnet *, struct mbuf *);
|
|
|
|
/* For if_link_state_change() eyes only... */
|
|
extern void (*vlan_link_state_p)(struct ifnet *, int);
|
|
|
|
static int
|
|
vlan_modevent(module_t mod, int type, void *data)
|
|
{
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
ifdetach_tag = EVENTHANDLER_REGISTER(ifnet_departure_event,
|
|
vlan_ifdetach, NULL, EVENTHANDLER_PRI_ANY);
|
|
if (ifdetach_tag == NULL)
|
|
return (ENOMEM);
|
|
LIST_INIT(&trunk_list);
|
|
VLAN_LOCK_INIT();
|
|
vlan_input_p = vlan_input;
|
|
vlan_link_state_p = vlan_link_state;
|
|
vlan_trunk_cap_p = vlan_trunk_capabilities;
|
|
if_clone_attach(&vlan_cloner);
|
|
break;
|
|
case MOD_UNLOAD:
|
|
{
|
|
struct ifvlantrunk *trunk, *trunk1;
|
|
|
|
if_clone_detach(&vlan_cloner);
|
|
EVENTHANDLER_DEREGISTER(ifnet_departure_event, ifdetach_tag);
|
|
vlan_input_p = NULL;
|
|
vlan_link_state_p = NULL;
|
|
vlan_trunk_cap_p = NULL;
|
|
VLAN_LOCK();
|
|
LIST_FOREACH_SAFE(trunk, &trunk_list, trunk_entry, trunk1)
|
|
trunk_destroy(trunk);
|
|
VLAN_UNLOCK();
|
|
VLAN_LOCK_DESTROY();
|
|
break;
|
|
}
|
|
default:
|
|
return (EOPNOTSUPP);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static moduledata_t vlan_mod = {
|
|
"if_vlan",
|
|
vlan_modevent,
|
|
0
|
|
};
|
|
|
|
DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
|
|
MODULE_VERSION(if_vlan, 3);
|
|
MODULE_DEPEND(if_vlan, miibus, 1, 1, 1);
|
|
|
|
static struct ifnet *
|
|
vlan_clone_match_ethertag(struct if_clone *ifc, const char *name, int *tag)
|
|
{
|
|
const char *cp;
|
|
struct ifnet *ifp;
|
|
int t = 0;
|
|
|
|
/* Check for <etherif>.<vlan> style interface names. */
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(ifp, &ifnet, if_link) {
|
|
if (ifp->if_type != IFT_ETHER)
|
|
continue;
|
|
if (strncmp(ifp->if_xname, name, strlen(ifp->if_xname)) != 0)
|
|
continue;
|
|
cp = name + strlen(ifp->if_xname);
|
|
if (*cp != '.')
|
|
continue;
|
|
for(; *cp != '\0'; cp++) {
|
|
if (*cp < '0' || *cp > '9')
|
|
continue;
|
|
t = (t * 10) + (*cp - '0');
|
|
}
|
|
if (tag != NULL)
|
|
*tag = t;
|
|
break;
|
|
}
|
|
IFNET_RUNLOCK();
|
|
|
|
return (ifp);
|
|
}
|
|
|
|
static int
|
|
vlan_clone_match(struct if_clone *ifc, const char *name)
|
|
{
|
|
const char *cp;
|
|
|
|
if (vlan_clone_match_ethertag(ifc, name, NULL) != NULL)
|
|
return (1);
|
|
|
|
if (strncmp(VLANNAME, name, strlen(VLANNAME)) != 0)
|
|
return (0);
|
|
for (cp = name + 4; *cp != '\0'; cp++) {
|
|
if (*cp < '0' || *cp > '9')
|
|
return (0);
|
|
}
|
|
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
vlan_clone_create(struct if_clone *ifc, char *name, size_t len, caddr_t params)
|
|
{
|
|
char *dp;
|
|
int wildcard;
|
|
int unit;
|
|
int error;
|
|
int tag;
|
|
int ethertag;
|
|
struct ifvlan *ifv;
|
|
struct ifnet *ifp;
|
|
struct ifnet *p;
|
|
struct vlanreq vlr;
|
|
static const u_char eaddr[6]; /* 00:00:00:00:00:00 */
|
|
|
|
/*
|
|
* There are 3 (ugh) ways to specify the cloned device:
|
|
* o pass a parameter block with the clone request.
|
|
* o specify parameters in the text of the clone device name
|
|
* o specify no parameters and get an unattached device that
|
|
* must be configured separately.
|
|
* The first technique is preferred; the latter two are
|
|
* supported for backwards compatibilty.
|
|
*/
|
|
if (params) {
|
|
error = copyin(params, &vlr, sizeof(vlr));
|
|
if (error)
|
|
return error;
|
|
p = ifunit(vlr.vlr_parent);
|
|
if (p == NULL)
|
|
return ENXIO;
|
|
/*
|
|
* Don't let the caller set up a VLAN tag with
|
|
* anything except VLID bits.
|
|
*/
|
|
if (vlr.vlr_tag & ~EVL_VLID_MASK)
|
|
return (EINVAL);
|
|
error = ifc_name2unit(name, &unit);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
ethertag = 1;
|
|
tag = vlr.vlr_tag;
|
|
wildcard = (unit < 0);
|
|
} else if ((p = vlan_clone_match_ethertag(ifc, name, &tag)) != NULL) {
|
|
ethertag = 1;
|
|
unit = -1;
|
|
wildcard = 0;
|
|
|
|
/*
|
|
* Don't let the caller set up a VLAN tag with
|
|
* anything except VLID bits.
|
|
*/
|
|
if (tag & ~EVL_VLID_MASK)
|
|
return (EINVAL);
|
|
} else {
|
|
ethertag = 0;
|
|
|
|
error = ifc_name2unit(name, &unit);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
wildcard = (unit < 0);
|
|
}
|
|
|
|
error = ifc_alloc_unit(ifc, &unit);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
/* In the wildcard case, we need to update the name. */
|
|
if (wildcard) {
|
|
for (dp = name; *dp != '\0'; dp++);
|
|
if (snprintf(dp, len - (dp-name), "%d", unit) >
|
|
len - (dp-name) - 1) {
|
|
panic("%s: interface name too long", __func__);
|
|
}
|
|
}
|
|
|
|
ifv = malloc(sizeof(struct ifvlan), M_VLAN, M_WAITOK | M_ZERO);
|
|
ifp = ifv->ifv_ifp = if_alloc(IFT_ETHER);
|
|
if (ifp == NULL) {
|
|
ifc_free_unit(ifc, unit);
|
|
free(ifv, M_VLAN);
|
|
return (ENOSPC);
|
|
}
|
|
SLIST_INIT(&ifv->vlan_mc_listhead);
|
|
|
|
ifp->if_softc = ifv;
|
|
/*
|
|
* Set the name manually rather than using if_initname because
|
|
* we don't conform to the default naming convention for interfaces.
|
|
*/
|
|
strlcpy(ifp->if_xname, name, IFNAMSIZ);
|
|
ifp->if_dname = ifc->ifc_name;
|
|
ifp->if_dunit = unit;
|
|
/* NB: flags are not set here */
|
|
ifp->if_linkmib = &ifv->ifv_mib;
|
|
ifp->if_linkmiblen = sizeof(ifv->ifv_mib);
|
|
/* NB: mtu is not set here */
|
|
|
|
ifp->if_init = vlan_init;
|
|
ifp->if_start = vlan_start;
|
|
ifp->if_ioctl = vlan_ioctl;
|
|
ifp->if_snd.ifq_maxlen = ifqmaxlen;
|
|
ifp->if_flags = VLAN_IFFLAGS;
|
|
ether_ifattach(ifp, eaddr);
|
|
/* Now undo some of the damage... */
|
|
ifp->if_baudrate = 0;
|
|
ifp->if_type = IFT_L2VLAN;
|
|
ifp->if_hdrlen = ETHER_VLAN_ENCAP_LEN;
|
|
|
|
if (ethertag) {
|
|
error = vlan_config(ifv, p, tag);
|
|
if (error != 0) {
|
|
/*
|
|
* Since we've partialy failed, we need to back
|
|
* out all the way, otherwise userland could get
|
|
* confused. Thus, we destroy the interface.
|
|
*/
|
|
ether_ifdetach(ifp);
|
|
vlan_unconfig(ifp);
|
|
if_free_type(ifp, IFT_ETHER);
|
|
free(ifv, M_VLAN);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/* Update flags on the parent, if necessary. */
|
|
vlan_setflags(ifp, 1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vlan_clone_destroy(struct if_clone *ifc, struct ifnet *ifp)
|
|
{
|
|
struct ifvlan *ifv = ifp->if_softc;
|
|
int unit = ifp->if_dunit;
|
|
|
|
ether_ifdetach(ifp); /* first, remove it from system-wide lists */
|
|
vlan_unconfig(ifp); /* now it can be unconfigured and freed */
|
|
if_free_type(ifp, IFT_ETHER);
|
|
free(ifv, M_VLAN);
|
|
ifc_free_unit(ifc, unit);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The ifp->if_init entry point for vlan(4) is a no-op.
|
|
*/
|
|
static void
|
|
vlan_init(void *foo __unused)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* The if_start method for vlan(4) interface. It doesn't
|
|
* raises the IFF_DRV_OACTIVE flag, since it is called
|
|
* only from IFQ_HANDOFF() macro in ether_output_frame().
|
|
* If the interface queue is full, and vlan_start() is
|
|
* not called, the queue would never get emptied and
|
|
* interface would stall forever.
|
|
*/
|
|
static void
|
|
vlan_start(struct ifnet *ifp)
|
|
{
|
|
struct ifvlan *ifv;
|
|
struct ifnet *p;
|
|
struct mbuf *m;
|
|
int error;
|
|
|
|
ifv = ifp->if_softc;
|
|
p = PARENT(ifv);
|
|
|
|
for (;;) {
|
|
IF_DEQUEUE(&ifp->if_snd, m);
|
|
if (m == 0)
|
|
break;
|
|
BPF_MTAP(ifp, m);
|
|
|
|
/*
|
|
* Do not run parent's if_start() if the parent is not up,
|
|
* or parent's driver will cause a system crash.
|
|
*/
|
|
if (!((p->if_flags & IFF_UP) &&
|
|
(p->if_drv_flags & IFF_DRV_RUNNING))) {
|
|
m_freem(m);
|
|
ifp->if_collisions++;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Pad the frame to the minimum size allowed if told to.
|
|
* This option is in accord with IEEE Std 802.1Q, 2003 Ed.,
|
|
* paragraph C.4.4.3.b. It can help to work around buggy
|
|
* bridges that violate paragraph C.4.4.3.a from the same
|
|
* document, i.e., fail to pad short frames after untagging.
|
|
* E.g., a tagged frame 66 bytes long (incl. FCS) is OK, but
|
|
* untagging it will produce a 62-byte frame, which is a runt
|
|
* and requires padding. There are VLAN-enabled network
|
|
* devices that just discard such runts instead or mishandle
|
|
* them somehow.
|
|
*/
|
|
if (soft_pad) {
|
|
static char pad[8]; /* just zeros */
|
|
int n;
|
|
|
|
for (n = ETHERMIN + ETHER_HDR_LEN - m->m_pkthdr.len;
|
|
n > 0; n -= sizeof(pad))
|
|
if (!m_append(m, min(n, sizeof(pad)), pad))
|
|
break;
|
|
|
|
if (n > 0) {
|
|
if_printf(ifp, "cannot pad short frame\n");
|
|
ifp->if_oerrors++;
|
|
m_freem(m);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If underlying interface can do VLAN tag insertion itself,
|
|
* just pass the packet along. However, we need some way to
|
|
* tell the interface where the packet came from so that it
|
|
* knows how to find the VLAN tag to use, so we attach a
|
|
* packet tag that holds it.
|
|
*/
|
|
if (p->if_capenable & IFCAP_VLAN_HWTAGGING) {
|
|
struct m_tag *mtag = (struct m_tag *)
|
|
uma_zalloc(zone_mtag_vlan, M_NOWAIT);
|
|
if (mtag == NULL) {
|
|
ifp->if_oerrors++;
|
|
m_freem(m);
|
|
continue;
|
|
}
|
|
VLAN_TAG_VALUE(mtag) = ifv->ifv_tag;
|
|
m_tag_prepend(m, mtag);
|
|
m->m_flags |= M_VLANTAG;
|
|
} else {
|
|
struct ether_vlan_header *evl;
|
|
|
|
M_PREPEND(m, ifv->ifv_encaplen, M_DONTWAIT);
|
|
if (m == NULL) {
|
|
if_printf(ifp,
|
|
"unable to prepend VLAN header\n");
|
|
ifp->if_oerrors++;
|
|
continue;
|
|
}
|
|
/* M_PREPEND takes care of m_len, m_pkthdr.len for us */
|
|
|
|
if (m->m_len < sizeof(*evl)) {
|
|
m = m_pullup(m, sizeof(*evl));
|
|
if (m == NULL) {
|
|
if_printf(ifp,
|
|
"cannot pullup VLAN header\n");
|
|
ifp->if_oerrors++;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Transform the Ethernet header into an Ethernet header
|
|
* with 802.1Q encapsulation.
|
|
*/
|
|
bcopy(mtod(m, char *) + ifv->ifv_encaplen,
|
|
mtod(m, char *), ETHER_HDR_LEN);
|
|
evl = mtod(m, struct ether_vlan_header *);
|
|
evl->evl_proto = evl->evl_encap_proto;
|
|
evl->evl_encap_proto = htons(ifv->ifv_proto);
|
|
evl->evl_tag = htons(ifv->ifv_tag);
|
|
#ifdef DEBUG
|
|
printf("%s: %*D\n", __func__, (int)sizeof(*evl),
|
|
(unsigned char *)evl, ":");
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Send it, precisely as ether_output() would have.
|
|
* We are already running at splimp.
|
|
*/
|
|
IFQ_HANDOFF(p, m, error);
|
|
if (!error)
|
|
ifp->if_opackets++;
|
|
else
|
|
ifp->if_oerrors++;
|
|
}
|
|
}
|
|
|
|
static void
|
|
vlan_input(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct ifvlantrunk *trunk = ifp->if_vlantrunk;
|
|
struct ifvlan *ifv;
|
|
struct m_tag *mtag;
|
|
uint16_t tag;
|
|
|
|
KASSERT(trunk != NULL, ("%s: no trunk", __func__));
|
|
|
|
if (m->m_flags & M_VLANTAG) {
|
|
/*
|
|
* Packet is tagged, but m contains a normal
|
|
* Ethernet frame; the tag is stored out-of-band.
|
|
*/
|
|
mtag = m_tag_locate(m, MTAG_VLAN, MTAG_VLAN_TAG, NULL);
|
|
KASSERT(mtag != NULL,
|
|
("%s: M_VLANTAG without m_tag", __func__));
|
|
tag = EVL_VLANOFTAG(VLAN_TAG_VALUE(mtag));
|
|
m_tag_delete(m, mtag);
|
|
m->m_flags &= ~M_VLANTAG;
|
|
} else {
|
|
struct ether_vlan_header *evl;
|
|
|
|
/*
|
|
* Packet is tagged in-band as specified by 802.1q.
|
|
*/
|
|
mtag = NULL;
|
|
switch (ifp->if_type) {
|
|
case IFT_ETHER:
|
|
if (m->m_len < sizeof(*evl) &&
|
|
(m = m_pullup(m, sizeof(*evl))) == NULL) {
|
|
if_printf(ifp, "cannot pullup VLAN header\n");
|
|
return;
|
|
}
|
|
evl = mtod(m, struct ether_vlan_header *);
|
|
tag = EVL_VLANOFTAG(ntohs(evl->evl_tag));
|
|
|
|
/*
|
|
* Restore the original ethertype. We'll remove
|
|
* the encapsulation after we've found the vlan
|
|
* interface corresponding to the tag.
|
|
*/
|
|
evl->evl_encap_proto = evl->evl_proto;
|
|
break;
|
|
default:
|
|
#ifdef INVARIANTS
|
|
panic("%s: %s has unsupported if_type %u",
|
|
__func__, ifp->if_xname, ifp->if_type);
|
|
#endif
|
|
m_freem(m);
|
|
ifp->if_noproto++;
|
|
return;
|
|
}
|
|
}
|
|
|
|
TRUNK_RLOCK(trunk);
|
|
#ifdef VLAN_ARRAY
|
|
ifv = trunk->vlans[tag];
|
|
#else
|
|
ifv = vlan_gethash(trunk, tag);
|
|
#endif
|
|
if (ifv == NULL || (ifv->ifv_ifp->if_flags & IFF_UP) == 0) {
|
|
TRUNK_RUNLOCK(trunk);
|
|
m_freem(m);
|
|
ifp->if_noproto++;
|
|
return;
|
|
}
|
|
TRUNK_RUNLOCK(trunk);
|
|
|
|
if (mtag == NULL) {
|
|
/*
|
|
* Packet had an in-line encapsulation header;
|
|
* remove it. The original header has already
|
|
* been fixed up above.
|
|
*/
|
|
bcopy(mtod(m, caddr_t),
|
|
mtod(m, caddr_t) + ETHER_VLAN_ENCAP_LEN,
|
|
ETHER_HDR_LEN);
|
|
m_adj(m, ETHER_VLAN_ENCAP_LEN);
|
|
}
|
|
|
|
m->m_pkthdr.rcvif = ifv->ifv_ifp;
|
|
ifv->ifv_ifp->if_ipackets++;
|
|
|
|
/* Pass it back through the parent's input routine. */
|
|
(*ifp->if_input)(ifv->ifv_ifp, m);
|
|
}
|
|
|
|
static int
|
|
vlan_config(struct ifvlan *ifv, struct ifnet *p, uint16_t tag)
|
|
{
|
|
struct ifvlantrunk *trunk;
|
|
struct ifnet *ifp;
|
|
int error = 0;
|
|
|
|
/* VID numbers 0x0 and 0xFFF are reserved */
|
|
if (tag == 0 || tag == 0xFFF)
|
|
return (EINVAL);
|
|
if (p->if_type != IFT_ETHER)
|
|
return (EPROTONOSUPPORT);
|
|
if ((p->if_flags & VLAN_IFFLAGS) != VLAN_IFFLAGS)
|
|
return (EPROTONOSUPPORT);
|
|
if (ifv->ifv_trunk)
|
|
return (EBUSY);
|
|
|
|
if (p->if_vlantrunk == NULL) {
|
|
trunk = malloc(sizeof(struct ifvlantrunk),
|
|
M_VLAN, M_WAITOK | M_ZERO);
|
|
#ifndef VLAN_ARRAY
|
|
vlan_inithash(trunk);
|
|
#endif
|
|
VLAN_LOCK();
|
|
if (p->if_vlantrunk != NULL) {
|
|
/* A race that that is very unlikely to be hit. */
|
|
#ifndef VLAN_ARRAY
|
|
vlan_freehash(trunk);
|
|
#endif
|
|
free(trunk, M_VLAN);
|
|
goto exists;
|
|
}
|
|
TRUNK_LOCK_INIT(trunk);
|
|
LIST_INSERT_HEAD(&trunk_list, trunk, trunk_entry);
|
|
TRUNK_LOCK(trunk);
|
|
p->if_vlantrunk = trunk;
|
|
trunk->parent = p;
|
|
} else {
|
|
VLAN_LOCK();
|
|
exists:
|
|
trunk = p->if_vlantrunk;
|
|
TRUNK_LOCK(trunk);
|
|
}
|
|
|
|
ifv->ifv_tag = tag; /* must set this before vlan_inshash() */
|
|
#ifdef VLAN_ARRAY
|
|
if (trunk->vlans[tag] != NULL) {
|
|
error = EEXIST;
|
|
goto done;
|
|
}
|
|
trunk->vlans[tag] = ifv;
|
|
trunk->refcnt++;
|
|
#else
|
|
error = vlan_inshash(trunk, ifv);
|
|
if (error)
|
|
goto done;
|
|
#endif
|
|
ifv->ifv_proto = ETHERTYPE_VLAN;
|
|
ifv->ifv_encaplen = ETHER_VLAN_ENCAP_LEN;
|
|
ifv->ifv_mintu = ETHERMIN;
|
|
ifv->ifv_pflags = 0;
|
|
|
|
/*
|
|
* If the parent supports the VLAN_MTU capability,
|
|
* i.e. can Tx/Rx larger than ETHER_MAX_LEN frames,
|
|
* use it.
|
|
*/
|
|
if (p->if_capenable & IFCAP_VLAN_MTU) {
|
|
/*
|
|
* No need to fudge the MTU since the parent can
|
|
* handle extended frames.
|
|
*/
|
|
ifv->ifv_mtufudge = 0;
|
|
} else {
|
|
/*
|
|
* Fudge the MTU by the encapsulation size. This
|
|
* makes us incompatible with strictly compliant
|
|
* 802.1Q implementations, but allows us to use
|
|
* the feature with other NetBSD implementations,
|
|
* which might still be useful.
|
|
*/
|
|
ifv->ifv_mtufudge = ifv->ifv_encaplen;
|
|
}
|
|
|
|
ifv->ifv_trunk = trunk;
|
|
ifp = ifv->ifv_ifp;
|
|
ifp->if_mtu = p->if_mtu - ifv->ifv_mtufudge;
|
|
ifp->if_baudrate = p->if_baudrate;
|
|
/*
|
|
* Copy only a selected subset of flags from the parent.
|
|
* Other flags are none of our business.
|
|
*/
|
|
#define VLAN_COPY_FLAGS (IFF_SIMPLEX)
|
|
ifp->if_flags &= ~VLAN_COPY_FLAGS;
|
|
ifp->if_flags |= p->if_flags & VLAN_COPY_FLAGS;
|
|
#undef VLAN_COPY_FLAGS
|
|
|
|
ifp->if_link_state = p->if_link_state;
|
|
|
|
vlan_capabilities(ifv);
|
|
|
|
/*
|
|
* Set up our ``Ethernet address'' to reflect the underlying
|
|
* physical interface's.
|
|
*/
|
|
bcopy(IF_LLADDR(p), IF_LLADDR(ifp), ETHER_ADDR_LEN);
|
|
|
|
/*
|
|
* Configure multicast addresses that may already be
|
|
* joined on the vlan device.
|
|
*/
|
|
(void)vlan_setmulti(ifp); /* XXX: VLAN lock held */
|
|
|
|
/* We are ready for operation now. */
|
|
ifp->if_drv_flags |= IFF_DRV_RUNNING;
|
|
done:
|
|
TRUNK_UNLOCK(trunk);
|
|
VLAN_UNLOCK();
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
vlan_unconfig(struct ifnet *ifp)
|
|
{
|
|
int ret;
|
|
|
|
VLAN_LOCK();
|
|
ret = vlan_unconfig_locked(ifp);
|
|
VLAN_UNLOCK();
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
vlan_unconfig_locked(struct ifnet *ifp)
|
|
{
|
|
struct ifvlantrunk *trunk;
|
|
struct vlan_mc_entry *mc;
|
|
struct ifvlan *ifv;
|
|
int error;
|
|
|
|
VLAN_LOCK_ASSERT();
|
|
|
|
ifv = ifp->if_softc;
|
|
trunk = ifv->ifv_trunk;
|
|
|
|
if (trunk) {
|
|
struct sockaddr_dl sdl;
|
|
struct ifnet *p = trunk->parent;
|
|
|
|
TRUNK_LOCK(trunk);
|
|
|
|
/*
|
|
* Since the interface is being unconfigured, we need to
|
|
* empty the list of multicast groups that we may have joined
|
|
* while we were alive from the parent's list.
|
|
*/
|
|
bzero((char *)&sdl, sizeof(sdl));
|
|
sdl.sdl_len = sizeof(sdl);
|
|
sdl.sdl_family = AF_LINK;
|
|
sdl.sdl_index = p->if_index;
|
|
sdl.sdl_type = IFT_ETHER;
|
|
sdl.sdl_alen = ETHER_ADDR_LEN;
|
|
|
|
while(SLIST_FIRST(&ifv->vlan_mc_listhead) != NULL) {
|
|
mc = SLIST_FIRST(&ifv->vlan_mc_listhead);
|
|
bcopy((char *)&mc->mc_addr, LLADDR(&sdl),
|
|
ETHER_ADDR_LEN);
|
|
error = if_delmulti(p, (struct sockaddr *)&sdl);
|
|
if (error)
|
|
return (error);
|
|
SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries);
|
|
free(mc, M_VLAN);
|
|
}
|
|
|
|
vlan_setflags(ifp, 0); /* clear special flags on parent */
|
|
#ifdef VLAN_ARRAY
|
|
trunk->vlans[ifv->ifv_tag] = NULL;
|
|
trunk->refcnt--;
|
|
#else
|
|
vlan_remhash(trunk, ifv);
|
|
#endif
|
|
ifv->ifv_trunk = NULL;
|
|
|
|
/*
|
|
* Check if we were the last.
|
|
*/
|
|
if (trunk->refcnt == 0) {
|
|
trunk->parent->if_vlantrunk = NULL;
|
|
/*
|
|
* XXXGL: If some ithread has already entered
|
|
* vlan_input() and is now blocked on the trunk
|
|
* lock, then it should preempt us right after
|
|
* unlock and finish its work. Then we will acquire
|
|
* lock again in trunk_destroy().
|
|
* XXX: not true in case of VLAN_ARRAY
|
|
*/
|
|
TRUNK_UNLOCK(trunk);
|
|
trunk_destroy(trunk);
|
|
} else
|
|
TRUNK_UNLOCK(trunk);
|
|
}
|
|
|
|
/* Disconnect from parent. */
|
|
if (ifv->ifv_pflags)
|
|
if_printf(ifp, "%s: ifv_pflags unclean\n", __func__);
|
|
ifp->if_mtu = ETHERMTU;
|
|
ifp->if_link_state = LINK_STATE_UNKNOWN;
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* Handle a reference counted flag that should be set on the parent as well */
|
|
static int
|
|
vlan_setflag(struct ifnet *ifp, int flag, int status,
|
|
int (*func)(struct ifnet *, int))
|
|
{
|
|
struct ifvlan *ifv;
|
|
int error;
|
|
|
|
/* XXX VLAN_LOCK_ASSERT(); */
|
|
|
|
ifv = ifp->if_softc;
|
|
status = status ? (ifp->if_flags & flag) : 0;
|
|
/* Now "status" contains the flag value or 0 */
|
|
|
|
/*
|
|
* See if recorded parent's status is different from what
|
|
* we want it to be. If it is, flip it. We record parent's
|
|
* status in ifv_pflags so that we won't clear parent's flag
|
|
* we haven't set. In fact, we don't clear or set parent's
|
|
* flags directly, but get or release references to them.
|
|
* That's why we can be sure that recorded flags still are
|
|
* in accord with actual parent's flags.
|
|
*/
|
|
if (status != (ifv->ifv_pflags & flag)) {
|
|
error = (*func)(PARENT(ifv), status);
|
|
if (error)
|
|
return (error);
|
|
ifv->ifv_pflags &= ~flag;
|
|
ifv->ifv_pflags |= status;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Handle IFF_* flags that require certain changes on the parent:
|
|
* if "status" is true, update parent's flags respective to our if_flags;
|
|
* if "status" is false, forcedly clear the flags set on parent.
|
|
*/
|
|
static int
|
|
vlan_setflags(struct ifnet *ifp, int status)
|
|
{
|
|
int error, i;
|
|
|
|
for (i = 0; vlan_pflags[i].flag; i++) {
|
|
error = vlan_setflag(ifp, vlan_pflags[i].flag,
|
|
status, vlan_pflags[i].func);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/* Inform all vlans that their parent has changed link state */
|
|
static void
|
|
vlan_link_state(struct ifnet *ifp, int link)
|
|
{
|
|
struct ifvlantrunk *trunk = ifp->if_vlantrunk;
|
|
struct ifvlan *ifv;
|
|
int i;
|
|
|
|
TRUNK_LOCK(trunk);
|
|
#ifdef VLAN_ARRAY
|
|
for (i = 0; i < VLAN_ARRAY_SIZE; i++)
|
|
if (trunk->vlans[i] != NULL) {
|
|
ifv = trunk->vlans[i];
|
|
#else
|
|
for (i = 0; i < (1 << trunk->hwidth); i++) {
|
|
LIST_FOREACH(ifv, &trunk->hash[i], ifv_list)
|
|
#endif
|
|
if_link_state_change(ifv->ifv_ifp,
|
|
trunk->parent->if_link_state);
|
|
}
|
|
TRUNK_UNLOCK(trunk);
|
|
}
|
|
|
|
static void
|
|
vlan_capabilities(struct ifvlan *ifv)
|
|
{
|
|
struct ifnet *p = PARENT(ifv);
|
|
struct ifnet *ifp = ifv->ifv_ifp;
|
|
|
|
TRUNK_LOCK_ASSERT(TRUNK(ifv));
|
|
|
|
/*
|
|
* If the parent interface can do checksum offloading
|
|
* on VLANs, then propagate its hardware-assisted
|
|
* checksumming flags. Also assert that checksum
|
|
* offloading requires hardware VLAN tagging.
|
|
*/
|
|
if (p->if_capabilities & IFCAP_VLAN_HWCSUM)
|
|
ifp->if_capabilities = p->if_capabilities & IFCAP_HWCSUM;
|
|
|
|
if (p->if_capenable & IFCAP_VLAN_HWCSUM &&
|
|
p->if_capenable & IFCAP_VLAN_HWTAGGING) {
|
|
ifp->if_capenable = p->if_capenable & IFCAP_HWCSUM;
|
|
ifp->if_hwassist = p->if_hwassist;
|
|
} else {
|
|
ifp->if_capenable = 0;
|
|
ifp->if_hwassist = 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
vlan_trunk_capabilities(struct ifnet *ifp)
|
|
{
|
|
struct ifvlantrunk *trunk = ifp->if_vlantrunk;
|
|
struct ifvlan *ifv;
|
|
int i;
|
|
|
|
TRUNK_LOCK(trunk);
|
|
#ifdef VLAN_ARRAY
|
|
for (i = 0; i < VLAN_ARRAY_SIZE; i++)
|
|
if (trunk->vlans[i] != NULL) {
|
|
ifv = trunk->vlans[i];
|
|
#else
|
|
for (i = 0; i < (1 << trunk->hwidth); i++) {
|
|
LIST_FOREACH(ifv, &trunk->hash[i], ifv_list)
|
|
#endif
|
|
vlan_capabilities(ifv);
|
|
}
|
|
TRUNK_UNLOCK(trunk);
|
|
}
|
|
|
|
static int
|
|
vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct ifnet *p;
|
|
struct ifreq *ifr;
|
|
struct ifvlan *ifv;
|
|
struct vlanreq vlr;
|
|
int error = 0;
|
|
|
|
ifr = (struct ifreq *)data;
|
|
ifa = (struct ifaddr *)data;
|
|
ifv = ifp->if_softc;
|
|
|
|
switch (cmd) {
|
|
case SIOCSIFADDR:
|
|
ifp->if_flags |= IFF_UP;
|
|
|
|
switch (ifa->ifa_addr->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
arp_ifinit(ifv->ifv_ifp, ifa);
|
|
break;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case SIOCGIFADDR:
|
|
{
|
|
struct sockaddr *sa;
|
|
|
|
sa = (struct sockaddr *) &ifr->ifr_data;
|
|
bcopy(IF_LLADDR(ifp), (caddr_t)sa->sa_data,
|
|
ETHER_ADDR_LEN);
|
|
}
|
|
break;
|
|
|
|
case SIOCGIFMEDIA:
|
|
VLAN_LOCK();
|
|
if (TRUNK(ifv) != NULL) {
|
|
error = (*PARENT(ifv)->if_ioctl)(PARENT(ifv),
|
|
SIOCGIFMEDIA, data);
|
|
VLAN_UNLOCK();
|
|
/* Limit the result to the parent's current config. */
|
|
if (error == 0) {
|
|
struct ifmediareq *ifmr;
|
|
|
|
ifmr = (struct ifmediareq *)data;
|
|
if (ifmr->ifm_count >= 1 && ifmr->ifm_ulist) {
|
|
ifmr->ifm_count = 1;
|
|
error = copyout(&ifmr->ifm_current,
|
|
ifmr->ifm_ulist,
|
|
sizeof(int));
|
|
}
|
|
}
|
|
} else {
|
|
VLAN_UNLOCK();
|
|
error = EINVAL;
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFMEDIA:
|
|
error = EINVAL;
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
/*
|
|
* Set the interface MTU.
|
|
*/
|
|
VLAN_LOCK();
|
|
if (TRUNK(ifv) != NULL) {
|
|
if (ifr->ifr_mtu >
|
|
(PARENT(ifv)->if_mtu - ifv->ifv_mtufudge) ||
|
|
ifr->ifr_mtu <
|
|
(ifv->ifv_mintu - ifv->ifv_mtufudge))
|
|
error = EINVAL;
|
|
else
|
|
ifp->if_mtu = ifr->ifr_mtu;
|
|
} else
|
|
error = EINVAL;
|
|
VLAN_UNLOCK();
|
|
break;
|
|
|
|
case SIOCSETVLAN:
|
|
error = copyin(ifr->ifr_data, &vlr, sizeof(vlr));
|
|
if (error)
|
|
break;
|
|
if (vlr.vlr_parent[0] == '\0') {
|
|
vlan_unconfig(ifp);
|
|
break;
|
|
}
|
|
p = ifunit(vlr.vlr_parent);
|
|
if (p == 0) {
|
|
error = ENOENT;
|
|
break;
|
|
}
|
|
/*
|
|
* Don't let the caller set up a VLAN tag with
|
|
* anything except VLID bits.
|
|
*/
|
|
if (vlr.vlr_tag & ~EVL_VLID_MASK) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
error = vlan_config(ifv, p, vlr.vlr_tag);
|
|
if (error)
|
|
break;
|
|
|
|
/* Update flags on the parent, if necessary. */
|
|
vlan_setflags(ifp, 1);
|
|
break;
|
|
|
|
case SIOCGETVLAN:
|
|
bzero(&vlr, sizeof(vlr));
|
|
VLAN_LOCK();
|
|
if (TRUNK(ifv) != NULL) {
|
|
strlcpy(vlr.vlr_parent, PARENT(ifv)->if_xname,
|
|
sizeof(vlr.vlr_parent));
|
|
vlr.vlr_tag = ifv->ifv_tag;
|
|
}
|
|
VLAN_UNLOCK();
|
|
error = copyout(&vlr, ifr->ifr_data, sizeof(vlr));
|
|
break;
|
|
|
|
case SIOCSIFFLAGS:
|
|
/*
|
|
* We should propagate selected flags to the parent,
|
|
* e.g., promiscuous mode.
|
|
*/
|
|
if (TRUNK(ifv) != NULL)
|
|
error = vlan_setflags(ifp, 1);
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
/*
|
|
* If we don't have a parent, just remember the membership for
|
|
* when we do.
|
|
*/
|
|
if (TRUNK(ifv) != NULL)
|
|
error = vlan_setmulti(ifp);
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
}
|
|
|
|
return (error);
|
|
}
|