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- /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 2010 Bjoern A. Zeeb <bz@FreeBSD.org>
- * Copyright (c) 1980, 1986, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #include "opt_bpf.h"
- #include "opt_inet6.h"
- #include "opt_inet.h"
- #include "opt_ddb.h"
- #include <sys/param.h>
- #include <sys/capsicum.h>
- #include <sys/conf.h>
- #include <sys/eventhandler.h>
- #include <sys/malloc.h>
- #include <sys/domainset.h>
- #include <sys/sbuf.h>
- #include <sys/bus.h>
- #include <sys/epoch.h>
- #include <sys/mbuf.h>
- #include <sys/systm.h>
- #include <sys/priv.h>
- #include <sys/proc.h>
- #include <sys/socket.h>
- #include <sys/socketvar.h>
- #include <sys/protosw.h>
- #include <sys/kernel.h>
- #include <sys/lock.h>
- #include <sys/refcount.h>
- #include <sys/module.h>
- #include <sys/nv.h>
- #include <sys/rwlock.h>
- #include <sys/sockio.h>
- #include <sys/syslog.h>
- #include <sys/sysctl.h>
- #include <sys/sysent.h>
- #include <sys/taskqueue.h>
- #include <sys/domain.h>
- #include <sys/jail.h>
- #include <sys/priv.h>
- #ifdef DDB
- #include <ddb/ddb.h>
- #endif
- #include <machine/stdarg.h>
- #include <vm/uma.h>
- #include <net/bpf.h>
- #include <net/ethernet.h>
- #include <net/if.h>
- #include <net/if_arp.h>
- #include <net/if_clone.h>
- #include <net/if_dl.h>
- #include <net/if_strings.h>
- #include <net/if_types.h>
- #include <net/if_var.h>
- #include <net/if_media.h>
- #include <net/if_mib.h>
- #include <net/if_private.h>
- #include <net/if_vlan_var.h>
- #include <net/radix.h>
- #include <net/route.h>
- #include <net/route/route_ctl.h>
- #include <net/vnet.h>
- #if defined(INET) || defined(INET6)
- #include <net/ethernet.h>
- #include <netinet/in.h>
- #include <netinet/in_var.h>
- #include <netinet/ip.h>
- #include <netinet/ip_carp.h>
- #ifdef INET
- #include <net/debugnet.h>
- #include <netinet/if_ether.h>
- #endif /* INET */
- #ifdef INET6
- #include <netinet6/in6_var.h>
- #include <netinet6/in6_ifattach.h>
- #endif /* INET6 */
- #endif /* INET || INET6 */
- #include <security/mac/mac_framework.h>
- /*
- * Consumers of struct ifreq such as tcpdump assume no pad between ifr_name
- * and ifr_ifru when it is used in SIOCGIFCONF.
- */
- _Static_assert(sizeof(((struct ifreq *)0)->ifr_name) ==
- offsetof(struct ifreq, ifr_ifru), "gap between ifr_name and ifr_ifru");
- __read_mostly epoch_t net_epoch_preempt;
- #ifdef COMPAT_FREEBSD32
- #include <sys/mount.h>
- #include <compat/freebsd32/freebsd32.h>
- struct ifreq_buffer32 {
- uint32_t length; /* (size_t) */
- uint32_t buffer; /* (void *) */
- };
- /*
- * Interface request structure used for socket
- * ioctl's. All interface ioctl's must have parameter
- * definitions which begin with ifr_name. The
- * remainder may be interface specific.
- */
- struct ifreq32 {
- char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
- union {
- struct sockaddr ifru_addr;
- struct sockaddr ifru_dstaddr;
- struct sockaddr ifru_broadaddr;
- struct ifreq_buffer32 ifru_buffer;
- short ifru_flags[2];
- short ifru_index;
- int ifru_jid;
- int ifru_metric;
- int ifru_mtu;
- int ifru_phys;
- int ifru_media;
- uint32_t ifru_data;
- int ifru_cap[2];
- u_int ifru_fib;
- u_char ifru_vlan_pcp;
- } ifr_ifru;
- };
- CTASSERT(sizeof(struct ifreq) == sizeof(struct ifreq32));
- CTASSERT(__offsetof(struct ifreq, ifr_ifru) ==
- __offsetof(struct ifreq32, ifr_ifru));
- struct ifconf32 {
- int32_t ifc_len;
- union {
- uint32_t ifcu_buf;
- uint32_t ifcu_req;
- } ifc_ifcu;
- };
- #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
- struct ifdrv32 {
- char ifd_name[IFNAMSIZ];
- uint32_t ifd_cmd;
- uint32_t ifd_len;
- uint32_t ifd_data;
- };
- #define SIOCSDRVSPEC32 _IOC_NEWTYPE(SIOCSDRVSPEC, struct ifdrv32)
- #define SIOCGDRVSPEC32 _IOC_NEWTYPE(SIOCGDRVSPEC, struct ifdrv32)
- struct ifgroupreq32 {
- char ifgr_name[IFNAMSIZ];
- u_int ifgr_len;
- union {
- char ifgru_group[IFNAMSIZ];
- uint32_t ifgru_groups;
- } ifgr_ifgru;
- };
- #define SIOCAIFGROUP32 _IOC_NEWTYPE(SIOCAIFGROUP, struct ifgroupreq32)
- #define SIOCGIFGROUP32 _IOC_NEWTYPE(SIOCGIFGROUP, struct ifgroupreq32)
- #define SIOCDIFGROUP32 _IOC_NEWTYPE(SIOCDIFGROUP, struct ifgroupreq32)
- #define SIOCGIFGMEMB32 _IOC_NEWTYPE(SIOCGIFGMEMB, struct ifgroupreq32)
- struct ifmediareq32 {
- char ifm_name[IFNAMSIZ];
- int ifm_current;
- int ifm_mask;
- int ifm_status;
- int ifm_active;
- int ifm_count;
- uint32_t ifm_ulist; /* (int *) */
- };
- #define SIOCGIFMEDIA32 _IOC_NEWTYPE(SIOCGIFMEDIA, struct ifmediareq32)
- #define SIOCGIFXMEDIA32 _IOC_NEWTYPE(SIOCGIFXMEDIA, struct ifmediareq32)
- #endif /* COMPAT_FREEBSD32 */
- union ifreq_union {
- struct ifreq ifr;
- #ifdef COMPAT_FREEBSD32
- struct ifreq32 ifr32;
- #endif
- };
- SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
- "Link layers");
- SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
- "Generic link-management");
- SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
- &ifqmaxlen, 0, "max send queue size");
- /* Log link state change events */
- static int log_link_state_change = 1;
- SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
- &log_link_state_change, 0,
- "log interface link state change events");
- /* Log promiscuous mode change events */
- static int log_promisc_mode_change = 1;
- SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN,
- &log_promisc_mode_change, 1,
- "log promiscuous mode change events");
- /* Interface description */
- static unsigned int ifdescr_maxlen = 1024;
- SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
- &ifdescr_maxlen, 0,
- "administrative maximum length for interface description");
- static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
- /* global sx for non-critical path ifdescr */
- static struct sx ifdescr_sx;
- SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
- void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
- void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
- /* These are external hooks for CARP. */
- void (*carp_linkstate_p)(struct ifnet *ifp);
- void (*carp_demote_adj_p)(int, char *);
- int (*carp_master_p)(struct ifaddr *);
- #if defined(INET) || defined(INET6)
- int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
- int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
- const struct sockaddr *sa);
- int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
- int (*carp_attach_p)(struct ifaddr *, int);
- void (*carp_detach_p)(struct ifaddr *, bool);
- #endif
- #ifdef INET
- int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
- #endif
- #ifdef INET6
- struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
- caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
- const struct in6_addr *taddr);
- #endif
- struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
- /*
- * XXX: Style; these should be sorted alphabetically, and unprototyped
- * static functions should be prototyped. Currently they are sorted by
- * declaration order.
- */
- static void if_attachdomain(void *);
- static void if_attachdomain1(struct ifnet *);
- static int ifconf(u_long, caddr_t);
- static void if_input_default(struct ifnet *, struct mbuf *);
- static int if_requestencap_default(struct ifnet *, struct if_encap_req *);
- static int if_setflag(struct ifnet *, int, int, int *, int);
- static int if_transmit_default(struct ifnet *ifp, struct mbuf *m);
- static void if_unroute(struct ifnet *, int flag, int fam);
- static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
- static void do_link_state_change(void *, int);
- static int if_getgroup(struct ifgroupreq *, struct ifnet *);
- static int if_getgroupmembers(struct ifgroupreq *);
- static void if_delgroups(struct ifnet *);
- static void if_attach_internal(struct ifnet *, bool);
- static int if_detach_internal(struct ifnet *, bool);
- static void if_siocaddmulti(void *, int);
- static void if_link_ifnet(struct ifnet *);
- static bool if_unlink_ifnet(struct ifnet *, bool);
- #ifdef VIMAGE
- static int if_vmove(struct ifnet *, struct vnet *);
- #endif
- #ifdef INET6
- /*
- * XXX: declare here to avoid to include many inet6 related files..
- * should be more generalized?
- */
- extern void nd6_setmtu(struct ifnet *);
- #endif
- /* ipsec helper hooks */
- VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
- VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
- int ifqmaxlen = IFQ_MAXLEN;
- VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
- VNET_DEFINE(struct ifgrouphead, ifg_head);
- /* Table of ifnet by index. */
- static int if_index;
- static int if_indexlim = 8;
- static struct ifindex_entry {
- struct ifnet *ife_ifnet;
- uint16_t ife_gencnt;
- } *ifindex_table;
- SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system,
- CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
- "Variables global to all interfaces");
- static int
- sysctl_ifcount(SYSCTL_HANDLER_ARGS)
- {
- int rv = 0;
- IFNET_RLOCK();
- for (int i = 1; i <= if_index; i++)
- if (ifindex_table[i].ife_ifnet != NULL &&
- ifindex_table[i].ife_ifnet->if_vnet == curvnet)
- rv = i;
- IFNET_RUNLOCK();
- return (sysctl_handle_int(oidp, &rv, 0, req));
- }
- SYSCTL_PROC(_net_link_generic_system, IFMIB_IFCOUNT, ifcount,
- CTLTYPE_INT | CTLFLAG_VNET | CTLFLAG_RD, NULL, 0, sysctl_ifcount, "I",
- "Maximum known interface index");
- /*
- * The global network interface list (V_ifnet) and related state (such as
- * if_index, if_indexlim, and ifindex_table) are protected by an sxlock.
- * This may be acquired to stabilise the list, or we may rely on NET_EPOCH.
- */
- struct sx ifnet_sxlock;
- SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
- struct sx ifnet_detach_sxlock;
- SX_SYSINIT_FLAGS(ifnet_detach, &ifnet_detach_sxlock, "ifnet_detach_sx",
- SX_RECURSE);
- #ifdef VIMAGE
- #define VNET_IS_SHUTTING_DOWN(_vnet) \
- ((_vnet)->vnet_shutdown && (_vnet)->vnet_state < SI_SUB_VNET_DONE)
- #endif
- static if_com_alloc_t *if_com_alloc[256];
- static if_com_free_t *if_com_free[256];
- static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
- MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
- MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
- struct ifnet *
- ifnet_byindex(u_int idx)
- {
- struct ifnet *ifp;
- NET_EPOCH_ASSERT();
- if (__predict_false(idx > if_index))
- return (NULL);
- ifp = ck_pr_load_ptr(&ifindex_table[idx].ife_ifnet);
- if (curvnet != NULL && ifp != NULL && ifp->if_vnet != curvnet)
- ifp = NULL;
- return (ifp);
- }
- struct ifnet *
- ifnet_byindex_ref(u_int idx)
- {
- struct ifnet *ifp;
- ifp = ifnet_byindex(idx);
- if (ifp == NULL || (ifp->if_flags & IFF_DYING))
- return (NULL);
- if (!if_try_ref(ifp))
- return (NULL);
- return (ifp);
- }
- struct ifnet *
- ifnet_byindexgen(uint16_t idx, uint16_t gen)
- {
- struct ifnet *ifp;
- NET_EPOCH_ASSERT();
- if (__predict_false(idx > if_index))
- return (NULL);
- ifp = ck_pr_load_ptr(&ifindex_table[idx].ife_ifnet);
- if (ifindex_table[idx].ife_gencnt == gen)
- return (ifp);
- else
- return (NULL);
- }
- /*
- * Network interface utility routines.
- *
- * Routines with ifa_ifwith* names take sockaddr *'s as
- * parameters.
- */
- static void
- if_init_idxtable(void *arg __unused)
- {
- ifindex_table = malloc(if_indexlim * sizeof(*ifindex_table),
- M_IFNET, M_WAITOK | M_ZERO);
- }
- SYSINIT(if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, if_init_idxtable, NULL);
- static void
- vnet_if_init(const void *unused __unused)
- {
- CK_STAILQ_INIT(&V_ifnet);
- CK_STAILQ_INIT(&V_ifg_head);
- vnet_if_clone_init();
- }
- VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
- NULL);
- static void
- if_link_ifnet(struct ifnet *ifp)
- {
- IFNET_WLOCK();
- CK_STAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
- #ifdef VIMAGE
- curvnet->vnet_ifcnt++;
- #endif
- IFNET_WUNLOCK();
- }
- static bool
- if_unlink_ifnet(struct ifnet *ifp, bool vmove)
- {
- struct ifnet *iter;
- int found = 0;
- IFNET_WLOCK();
- CK_STAILQ_FOREACH(iter, &V_ifnet, if_link)
- if (iter == ifp) {
- CK_STAILQ_REMOVE(&V_ifnet, ifp, ifnet, if_link);
- if (!vmove)
- ifp->if_flags |= IFF_DYING;
- found = 1;
- break;
- }
- #ifdef VIMAGE
- curvnet->vnet_ifcnt--;
- #endif
- IFNET_WUNLOCK();
- return (found);
- }
- #ifdef VIMAGE
- static void
- vnet_if_return(const void *unused __unused)
- {
- struct ifnet *ifp, *nifp;
- struct ifnet **pending;
- int found __diagused;
- int i;
- i = 0;
- /*
- * We need to protect our access to the V_ifnet tailq. Ordinarily we'd
- * enter NET_EPOCH, but that's not possible, because if_vmove() calls
- * if_detach_internal(), which waits for NET_EPOCH callbacks to
- * complete. We can't do that from within NET_EPOCH.
- *
- * However, we can also use the IFNET_xLOCK, which is the V_ifnet
- * read/write lock. We cannot hold the lock as we call if_vmove()
- * though, as that presents LOR w.r.t ifnet_sx, in_multi_sx and iflib
- * ctx lock.
- */
- IFNET_WLOCK();
- pending = malloc(sizeof(struct ifnet *) * curvnet->vnet_ifcnt,
- M_IFNET, M_WAITOK | M_ZERO);
- /* Return all inherited interfaces to their parent vnets. */
- CK_STAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) {
- if (ifp->if_home_vnet != ifp->if_vnet) {
- found = if_unlink_ifnet(ifp, true);
- MPASS(found);
- pending[i++] = ifp;
- }
- }
- IFNET_WUNLOCK();
- for (int j = 0; j < i; j++) {
- sx_xlock(&ifnet_detach_sxlock);
- if_vmove(pending[j], pending[j]->if_home_vnet);
- sx_xunlock(&ifnet_detach_sxlock);
- }
- free(pending, M_IFNET);
- }
- VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY,
- vnet_if_return, NULL);
- #endif
- /*
- * Allocate a struct ifnet and an index for an interface. A layer 2
- * common structure will also be allocated if an allocation routine is
- * registered for the passed type.
- */
- static struct ifnet *
- if_alloc_domain(u_char type, int numa_domain)
- {
- struct ifnet *ifp;
- u_short idx;
- KASSERT(numa_domain <= IF_NODOM, ("numa_domain too large"));
- if (numa_domain == IF_NODOM)
- ifp = malloc(sizeof(struct ifnet), M_IFNET,
- M_WAITOK | M_ZERO);
- else
- ifp = malloc_domainset(sizeof(struct ifnet), M_IFNET,
- DOMAINSET_PREF(numa_domain), M_WAITOK | M_ZERO);
- ifp->if_type = type;
- ifp->if_alloctype = type;
- ifp->if_numa_domain = numa_domain;
- #ifdef VIMAGE
- ifp->if_vnet = curvnet;
- #endif
- if (if_com_alloc[type] != NULL) {
- ifp->if_l2com = if_com_alloc[type](type, ifp);
- KASSERT(ifp->if_l2com, ("%s: if_com_alloc[%u] failed", __func__,
- type));
- }
- IF_ADDR_LOCK_INIT(ifp);
- TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
- TASK_INIT(&ifp->if_addmultitask, 0, if_siocaddmulti, ifp);
- ifp->if_afdata_initialized = 0;
- IF_AFDATA_LOCK_INIT(ifp);
- CK_STAILQ_INIT(&ifp->if_addrhead);
- CK_STAILQ_INIT(&ifp->if_multiaddrs);
- CK_STAILQ_INIT(&ifp->if_groups);
- #ifdef MAC
- mac_ifnet_init(ifp);
- #endif
- ifq_init(&ifp->if_snd, ifp);
- refcount_init(&ifp->if_refcount, 1); /* Index reference. */
- for (int i = 0; i < IFCOUNTERS; i++)
- ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
- ifp->if_get_counter = if_get_counter_default;
- ifp->if_pcp = IFNET_PCP_NONE;
- /* Allocate an ifindex array entry. */
- IFNET_WLOCK();
- /*
- * Try to find an empty slot below if_index. If we fail, take the
- * next slot.
- */
- for (idx = 1; idx <= if_index; idx++) {
- if (ifindex_table[idx].ife_ifnet == NULL)
- break;
- }
- /* Catch if_index overflow. */
- if (idx >= if_indexlim) {
- struct ifindex_entry *new, *old;
- int newlim;
- newlim = if_indexlim * 2;
- new = malloc(newlim * sizeof(*new), M_IFNET, M_WAITOK | M_ZERO);
- memcpy(new, ifindex_table, if_indexlim * sizeof(*new));
- old = ifindex_table;
- ck_pr_store_ptr(&ifindex_table, new);
- if_indexlim = newlim;
- NET_EPOCH_WAIT();
- free(old, M_IFNET);
- }
- if (idx > if_index)
- if_index = idx;
- ifp->if_index = idx;
- ifp->if_idxgen = ifindex_table[idx].ife_gencnt;
- ck_pr_store_ptr(&ifindex_table[idx].ife_ifnet, ifp);
- IFNET_WUNLOCK();
- return (ifp);
- }
- struct ifnet *
- if_alloc_dev(u_char type, device_t dev)
- {
- int numa_domain;
- if (dev == NULL || bus_get_domain(dev, &numa_domain) != 0)
- return (if_alloc_domain(type, IF_NODOM));
- return (if_alloc_domain(type, numa_domain));
- }
- struct ifnet *
- if_alloc(u_char type)
- {
- return (if_alloc_domain(type, IF_NODOM));
- }
- /*
- * Do the actual work of freeing a struct ifnet, and layer 2 common
- * structure. This call is made when the network epoch guarantees
- * us that nobody holds a pointer to the interface.
- */
- static void
- if_free_deferred(epoch_context_t ctx)
- {
- struct ifnet *ifp = __containerof(ctx, struct ifnet, if_epoch_ctx);
- KASSERT((ifp->if_flags & IFF_DYING),
- ("%s: interface not dying", __func__));
- if (if_com_free[ifp->if_alloctype] != NULL)
- if_com_free[ifp->if_alloctype](ifp->if_l2com,
- ifp->if_alloctype);
- #ifdef MAC
- mac_ifnet_destroy(ifp);
- #endif /* MAC */
- IF_AFDATA_DESTROY(ifp);
- IF_ADDR_LOCK_DESTROY(ifp);
- ifq_delete(&ifp->if_snd);
- for (int i = 0; i < IFCOUNTERS; i++)
- counter_u64_free(ifp->if_counters[i]);
- if_freedescr(ifp->if_description);
- free(ifp->if_hw_addr, M_IFADDR);
- free(ifp, M_IFNET);
- }
- /*
- * Deregister an interface and free the associated storage.
- */
- void
- if_free(struct ifnet *ifp)
- {
- ifp->if_flags |= IFF_DYING; /* XXX: Locking */
- /*
- * XXXGL: An interface index is really an alias to ifp pointer.
- * Why would we clear the alias now, and not in the deferred
- * context? Indeed there is nothing wrong with some network
- * thread obtaining ifp via ifnet_byindex() inside the network
- * epoch and then dereferencing ifp while we perform if_free(),
- * and after if_free() finished, too.
- *
- * This early index freeing was important back when ifindex was
- * virtualized and interface would outlive the vnet.
- */
- IFNET_WLOCK();
- MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
- ck_pr_store_ptr(&ifindex_table[ifp->if_index].ife_ifnet, NULL);
- ifindex_table[ifp->if_index].ife_gencnt++;
- while (if_index > 0 && ifindex_table[if_index].ife_ifnet == NULL)
- if_index--;
- IFNET_WUNLOCK();
- if (refcount_release(&ifp->if_refcount))
- NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx);
- }
- /*
- * Interfaces to keep an ifnet type-stable despite the possibility of the
- * driver calling if_free(). If there are additional references, we defer
- * freeing the underlying data structure.
- */
- void
- if_ref(struct ifnet *ifp)
- {
- u_int old __diagused;
- /* We don't assert the ifnet list lock here, but arguably should. */
- old = refcount_acquire(&ifp->if_refcount);
- KASSERT(old > 0, ("%s: ifp %p has 0 refs", __func__, ifp));
- }
- bool
- if_try_ref(struct ifnet *ifp)
- {
- NET_EPOCH_ASSERT();
- return (refcount_acquire_if_not_zero(&ifp->if_refcount));
- }
- void
- if_rele(struct ifnet *ifp)
- {
- if (!refcount_release(&ifp->if_refcount))
- return;
- NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx);
- }
- void
- ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
- {
- mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
- if (ifq->ifq_maxlen == 0)
- ifq->ifq_maxlen = ifqmaxlen;
- ifq->altq_type = 0;
- ifq->altq_disc = NULL;
- ifq->altq_flags &= ALTQF_CANTCHANGE;
- ifq->altq_tbr = NULL;
- ifq->altq_ifp = ifp;
- }
- void
- ifq_delete(struct ifaltq *ifq)
- {
- mtx_destroy(&ifq->ifq_mtx);
- }
- /*
- * Perform generic interface initialization tasks and attach the interface
- * to the list of "active" interfaces. If vmove flag is set on entry
- * to if_attach_internal(), perform only a limited subset of initialization
- * tasks, given that we are moving from one vnet to another an ifnet which
- * has already been fully initialized.
- *
- * Note that if_detach_internal() removes group membership unconditionally
- * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
- * Thus, when if_vmove() is applied to a cloned interface, group membership
- * is lost while a cloned one always joins a group whose name is
- * ifc->ifc_name. To recover this after if_detach_internal() and
- * if_attach_internal(), the cloner should be specified to
- * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
- * attempts to join a group whose name is ifc->ifc_name.
- *
- * XXX:
- * - The decision to return void and thus require this function to
- * succeed is questionable.
- * - We should probably do more sanity checking. For instance we don't
- * do anything to insure if_xname is unique or non-empty.
- */
- void
- if_attach(struct ifnet *ifp)
- {
- if_attach_internal(ifp, false);
- }
- /*
- * Compute the least common TSO limit.
- */
- void
- if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
- {
- /*
- * 1) If there is no limit currently, take the limit from
- * the network adapter.
- *
- * 2) If the network adapter has a limit below the current
- * limit, apply it.
- */
- if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
- ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
- pmax->tsomaxbytes = ifp->if_hw_tsomax;
- }
- if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
- ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
- pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
- }
- if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
- ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
- pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
- }
- }
- /*
- * Update TSO limit of a network adapter.
- *
- * Returns zero if no change. Else non-zero.
- */
- int
- if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
- {
- int retval = 0;
- if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
- ifp->if_hw_tsomax = pmax->tsomaxbytes;
- retval++;
- }
- if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
- ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
- retval++;
- }
- if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
- ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
- retval++;
- }
- return (retval);
- }
- static void
- if_attach_internal(struct ifnet *ifp, bool vmove)
- {
- unsigned socksize, ifasize;
- int namelen, masklen;
- struct sockaddr_dl *sdl;
- struct ifaddr *ifa;
- MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
- #ifdef VIMAGE
- ifp->if_vnet = curvnet;
- if (ifp->if_home_vnet == NULL)
- ifp->if_home_vnet = curvnet;
- #endif
- if_addgroup(ifp, IFG_ALL);
- #ifdef VIMAGE
- /* Restore group membership for cloned interface. */
- if (vmove)
- if_clone_restoregroup(ifp);
- #endif
- getmicrotime(&ifp->if_lastchange);
- ifp->if_epoch = time_uptime;
- KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
- (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
- ("transmit and qflush must both either be set or both be NULL"));
- if (ifp->if_transmit == NULL) {
- ifp->if_transmit = if_transmit_default;
- ifp->if_qflush = if_qflush;
- }
- if (ifp->if_input == NULL)
- ifp->if_input = if_input_default;
- if (ifp->if_requestencap == NULL)
- ifp->if_requestencap = if_requestencap_default;
- if (!vmove) {
- #ifdef MAC
- mac_ifnet_create(ifp);
- #endif
- /*
- * Create a Link Level name for this device.
- */
- namelen = strlen(ifp->if_xname);
- /*
- * Always save enough space for any possiable name so we
- * can do a rename in place later.
- */
- masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
- socksize = masklen + ifp->if_addrlen;
- if (socksize < sizeof(*sdl))
- socksize = sizeof(*sdl);
- socksize = roundup2(socksize, sizeof(long));
- ifasize = sizeof(*ifa) + 2 * socksize;
- ifa = ifa_alloc(ifasize, M_WAITOK);
- sdl = (struct sockaddr_dl *)(ifa + 1);
- sdl->sdl_len = socksize;
- sdl->sdl_family = AF_LINK;
- bcopy(ifp->if_xname, sdl->sdl_data, namelen);
- sdl->sdl_nlen = namelen;
- sdl->sdl_index = ifp->if_index;
- sdl->sdl_type = ifp->if_type;
- ifp->if_addr = ifa;
- ifa->ifa_ifp = ifp;
- ifa->ifa_addr = (struct sockaddr *)sdl;
- sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
- ifa->ifa_netmask = (struct sockaddr *)sdl;
- sdl->sdl_len = masklen;
- while (namelen != 0)
- sdl->sdl_data[--namelen] = 0xff;
- CK_STAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
- /* Reliably crash if used uninitialized. */
- ifp->if_broadcastaddr = NULL;
- if (ifp->if_type == IFT_ETHER) {
- ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR,
- M_WAITOK | M_ZERO);
- }
- #if defined(INET) || defined(INET6)
- /* Use defaults for TSO, if nothing is set */
- if (ifp->if_hw_tsomax == 0 &&
- ifp->if_hw_tsomaxsegcount == 0 &&
- ifp->if_hw_tsomaxsegsize == 0) {
- /*
- * The TSO defaults needs to be such that an
- * NFS mbuf list of 35 mbufs totalling just
- * below 64K works and that a chain of mbufs
- * can be defragged into at most 32 segments:
- */
- ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
- (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
- ifp->if_hw_tsomaxsegcount = 35;
- ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
- /* XXX some drivers set IFCAP_TSO after ethernet attach */
- if (ifp->if_capabilities & IFCAP_TSO) {
- if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
- ifp->if_hw_tsomax,
- ifp->if_hw_tsomaxsegcount,
- ifp->if_hw_tsomaxsegsize);
- }
- }
- #endif
- }
- #ifdef VIMAGE
- else {
- /*
- * Update the interface index in the link layer address
- * of the interface.
- */
- for (ifa = ifp->if_addr; ifa != NULL;
- ifa = CK_STAILQ_NEXT(ifa, ifa_link)) {
- if (ifa->ifa_addr->sa_family == AF_LINK) {
- sdl = (struct sockaddr_dl *)ifa->ifa_addr;
- sdl->sdl_index = ifp->if_index;
- }
- }
- }
- #endif
- if_link_ifnet(ifp);
- if (domain_init_status >= 2)
- if_attachdomain1(ifp);
- EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
- if (IS_DEFAULT_VNET(curvnet))
- devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
- }
- static void
- if_epochalloc(void *dummy __unused)
- {
- net_epoch_preempt = epoch_alloc("Net preemptible", EPOCH_PREEMPT);
- }
- SYSINIT(ifepochalloc, SI_SUB_EPOCH, SI_ORDER_ANY, if_epochalloc, NULL);
- static void
- if_attachdomain(void *dummy)
- {
- struct ifnet *ifp;
- CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link)
- if_attachdomain1(ifp);
- }
- SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
- if_attachdomain, NULL);
- static void
- if_attachdomain1(struct ifnet *ifp)
- {
- struct domain *dp;
- /*
- * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
- * cannot lock ifp->if_afdata initialization, entirely.
- */
- IF_AFDATA_LOCK(ifp);
- if (ifp->if_afdata_initialized >= domain_init_status) {
- IF_AFDATA_UNLOCK(ifp);
- log(LOG_WARNING, "%s called more than once on %s\n",
- __func__, ifp->if_xname);
- return;
- }
- ifp->if_afdata_initialized = domain_init_status;
- IF_AFDATA_UNLOCK(ifp);
- /* address family dependent data region */
- bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
- SLIST_FOREACH(dp, &domains, dom_next) {
- if (dp->dom_ifattach)
- ifp->if_afdata[dp->dom_family] =
- (*dp->dom_ifattach)(ifp);
- }
- }
- /*
- * Remove any unicast or broadcast network addresses from an interface.
- */
- void
- if_purgeaddrs(struct ifnet *ifp)
- {
- struct ifaddr *ifa;
- #ifdef INET6
- /*
- * Need to leave multicast addresses of proxy NDP llentries
- * before in6_purgeifaddr() because the llentries are keys
- * for in6_multi objects of proxy NDP entries.
- * in6_purgeifaddr()s clean up llentries including proxy NDPs
- * then we would lose the keys if they are called earlier.
- */
- in6_purge_proxy_ndp(ifp);
- #endif
- while (1) {
- struct epoch_tracker et;
- NET_EPOCH_ENTER(et);
- CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
- if (ifa->ifa_addr->sa_family != AF_LINK)
- break;
- }
- NET_EPOCH_EXIT(et);
- if (ifa == NULL)
- break;
- #ifdef INET
- /* XXX: Ugly!! ad hoc just for INET */
- if (ifa->ifa_addr->sa_family == AF_INET) {
- struct ifreq ifr;
- bzero(&ifr, sizeof(ifr));
- ifr.ifr_addr = *ifa->ifa_addr;
- if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
- NULL) == 0)
- continue;
- }
- #endif /* INET */
- #ifdef INET6
- if (ifa->ifa_addr->sa_family == AF_INET6) {
- in6_purgeifaddr((struct in6_ifaddr *)ifa);
- /* ifp_addrhead is already updated */
- continue;
- }
- #endif /* INET6 */
- IF_ADDR_WLOCK(ifp);
- CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
- IF_ADDR_WUNLOCK(ifp);
- ifa_free(ifa);
- }
- }
- /*
- * Remove any multicast network addresses from an interface when an ifnet
- * is going away.
- */
- static void
- if_purgemaddrs(struct ifnet *ifp)
- {
- struct ifmultiaddr *ifma;
- IF_ADDR_WLOCK(ifp);
- while (!CK_STAILQ_EMPTY(&ifp->if_multiaddrs)) {
- ifma = CK_STAILQ_FIRST(&ifp->if_multiaddrs);
- CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
- if_delmulti_locked(ifp, ifma, 1);
- }
- IF_ADDR_WUNLOCK(ifp);
- }
- /*
- * Detach an interface, removing it from the list of "active" interfaces.
- * If vmove flag is set on entry to if_detach_internal(), perform only a
- * limited subset of cleanup tasks, given that we are moving an ifnet from
- * one vnet to another, where it must be fully operational.
- *
- * XXXRW: There are some significant questions about event ordering, and
- * how to prevent things from starting to use the interface during detach.
- */
- void
- if_detach(struct ifnet *ifp)
- {
- bool found;
- CURVNET_SET_QUIET(ifp->if_vnet);
- found = if_unlink_ifnet(ifp, false);
- if (found) {
- sx_xlock(&ifnet_detach_sxlock);
- if_detach_internal(ifp, false);
- sx_xunlock(&ifnet_detach_sxlock);
- }
- CURVNET_RESTORE();
- }
- /*
- * The vmove flag, if set, indicates that we are called from a callpath
- * that is moving an interface to a different vnet instance.
- *
- * The shutdown flag, if set, indicates that we are called in the
- * process of shutting down a vnet instance. Currently only the
- * vnet_if_return SYSUNINIT function sets it. Note: we can be called
- * on a vnet instance shutdown without this flag being set, e.g., when
- * the cloned interfaces are destoyed as first thing of teardown.
- */
- static int
- if_detach_internal(struct ifnet *ifp, bool vmove)
- {
- struct ifaddr *ifa;
- int i;
- struct domain *dp;
- #ifdef VIMAGE
- bool shutdown;
- shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
- #endif
- sx_assert(&ifnet_detach_sxlock, SX_XLOCKED);
- /*
- * At this point we know the interface still was on the ifnet list
- * and we removed it so we are in a stable state.
- */
- NET_EPOCH_WAIT();
- /*
- * Ensure all pending EPOCH(9) callbacks have been executed. This
- * fixes issues about late destruction of multicast options
- * which lead to leave group calls, which in turn access the
- * belonging ifnet structure:
- */
- NET_EPOCH_DRAIN_CALLBACKS();
- /*
- * In any case (destroy or vmove) detach us from the groups
- * and remove/wait for pending events on the taskq.
- * XXX-BZ in theory an interface could still enqueue a taskq change?
- */
- if_delgroups(ifp);
- taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
- taskqueue_drain(taskqueue_swi, &ifp->if_addmultitask);
- if_down(ifp);
- #ifdef VIMAGE
- /*
- * On VNET shutdown abort here as the stack teardown will do all
- * the work top-down for us.
- */
- if (shutdown) {
- /* Give interface users the chance to clean up. */
- EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
- /*
- * In case of a vmove we are done here without error.
- * If we would signal an error it would lead to the same
- * abort as if we did not find the ifnet anymore.
- * if_detach() calls us in void context and does not care
- * about an early abort notification, so life is splendid :)
- */
- goto finish_vnet_shutdown;
- }
- #endif
- /*
- * At this point we are not tearing down a VNET and are either
- * going to destroy or vmove the interface and have to cleanup
- * accordingly.
- */
- /*
- * Remove routes and flush queues.
- */
- #ifdef ALTQ
- if (ALTQ_IS_ENABLED(&ifp->if_snd))
- altq_disable(&ifp->if_snd);
- if (ALTQ_IS_ATTACHED(&ifp->if_snd))
- altq_detach(&ifp->if_snd);
- #endif
- if_purgeaddrs(ifp);
- #ifdef INET
- in_ifdetach(ifp);
- #endif
- #ifdef INET6
- /*
- * Remove all IPv6 kernel structs related to ifp. This should be done
- * before removing routing entries below, since IPv6 interface direct
- * routes are expected to be removed by the IPv6-specific kernel API.
- * Otherwise, the kernel will detect some inconsistency and bark it.
- */
- in6_ifdetach(ifp);
- #endif
- if_purgemaddrs(ifp);
- EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
- if (IS_DEFAULT_VNET(curvnet))
- devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
- if (!vmove) {
- /*
- * Prevent further calls into the device driver via ifnet.
- */
- if_dead(ifp);
- /*
- * Clean up all addresses.
- */
- IF_ADDR_WLOCK(ifp);
- if (!CK_STAILQ_EMPTY(&ifp->if_addrhead)) {
- ifa = CK_STAILQ_FIRST(&ifp->if_addrhead);
- CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
- IF_ADDR_WUNLOCK(ifp);
- ifa_free(ifa);
- } else
- IF_ADDR_WUNLOCK(ifp);
- }
- rt_flushifroutes(ifp);
- #ifdef VIMAGE
- finish_vnet_shutdown:
- #endif
- /*
- * We cannot hold the lock over dom_ifdetach calls as they might
- * sleep, for example trying to drain a callout, thus open up the
- * theoretical race with re-attaching.
- */
- IF_AFDATA_LOCK(ifp);
- i = ifp->if_afdata_initialized;
- ifp->if_afdata_initialized = 0;
- IF_AFDATA_UNLOCK(ifp);
- if (i == 0)
- return (0);
- SLIST_FOREACH(dp, &domains, dom_next) {
- if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) {
- (*dp->dom_ifdetach)(ifp,
- ifp->if_afdata[dp->dom_family]);
- ifp->if_afdata[dp->dom_family] = NULL;
- }
- }
- return (0);
- }
- #ifdef VIMAGE
- /*
- * if_vmove() performs a limited version of if_detach() in current
- * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
- */
- static int
- if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
- {
- int rc;
- /*
- * Detach from current vnet, but preserve LLADDR info, do not
- * mark as dead etc. so that the ifnet can be reattached later.
- * If we cannot find it, we lost the race to someone else.
- */
- rc = if_detach_internal(ifp, true);
- if (rc != 0)
- return (rc);
- /*
- * Perform interface-specific reassignment tasks, if provided by
- * the driver.
- */
- if (ifp->if_reassign != NULL)
- ifp->if_reassign(ifp, new_vnet, NULL);
- /*
- * Switch to the context of the target vnet.
- */
- CURVNET_SET_QUIET(new_vnet);
- if_attach_internal(ifp, true);
- CURVNET_RESTORE();
- return (0);
- }
- /*
- * Move an ifnet to or from another child prison/vnet, specified by the jail id.
- */
- static int
- if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
- {
- struct prison *pr;
- struct ifnet *difp;
- int error;
- bool found __diagused;
- bool shutdown;
- MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
- /* Try to find the prison within our visibility. */
- sx_slock(&allprison_lock);
- pr = prison_find_child(td->td_ucred->cr_prison, jid);
- sx_sunlock(&allprison_lock);
- if (pr == NULL)
- return (ENXIO);
- prison_hold_locked(pr);
- mtx_unlock(&pr->pr_mtx);
- /* Do not try to move the iface from and to the same prison. */
- if (pr->pr_vnet == ifp->if_vnet) {
- prison_free(pr);
- return (EEXIST);
- }
- /* Make sure the named iface does not exists in the dst. prison/vnet. */
- /* XXX Lock interfaces to avoid races. */
- CURVNET_SET_QUIET(pr->pr_vnet);
- difp = ifunit(ifname);
- CURVNET_RESTORE();
- if (difp != NULL) {
- prison_free(pr);
- return (EEXIST);
- }
- sx_xlock(&ifnet_detach_sxlock);
- /* Make sure the VNET is stable. */
- shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
- if (shutdown) {
- sx_xunlock(&ifnet_detach_sxlock);
- prison_free(pr);
- return (EBUSY);
- }
- found = if_unlink_ifnet(ifp, true);
- if (! found) {
- sx_xunlock(&ifnet_detach_sxlock);
- prison_free(pr);
- return (ENODEV);
- }
- /* Move the interface into the child jail/vnet. */
- error = if_vmove(ifp, pr->pr_vnet);
- /* Report the new if_xname back to the userland on success. */
- if (error == 0)
- sprintf(ifname, "%s", ifp->if_xname);
- sx_xunlock(&ifnet_detach_sxlock);
- prison_free(pr);
- return (error);
- }
- static int
- if_vmove_reclaim(struct thread *td, char *ifname, int jid)
- {
- struct prison *pr;
- struct vnet *vnet_dst;
- struct ifnet *ifp;
- int error, found __diagused;
- bool shutdown;
- /* Try to find the prison within our visibility. */
- sx_slock(&allprison_lock);
- pr = prison_find_child(td->td_ucred->cr_prison, jid);
- sx_sunlock(&allprison_lock);
- if (pr == NULL)
- return (ENXIO);
- prison_hold_locked(pr);
- mtx_unlock(&pr->pr_mtx);
- /* Make sure the named iface exists in the source prison/vnet. */
- CURVNET_SET(pr->pr_vnet);
- ifp = ifunit(ifname); /* XXX Lock to avoid races. */
- if (ifp == NULL) {
- CURVNET_RESTORE();
- prison_free(pr);
- return (ENXIO);
- }
- /* Do not try to move the iface from and to the same prison. */
- vnet_dst = TD_TO_VNET(td);
- if (vnet_dst == ifp->if_vnet) {
- CURVNET_RESTORE();
- prison_free(pr);
- return (EEXIST);
- }
- /* Make sure the VNET is stable. */
- shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
- if (shutdown) {
- CURVNET_RESTORE();
- prison_free(pr);
- return (EBUSY);
- }
- /* Get interface back from child jail/vnet. */
- found = if_unlink_ifnet(ifp, true);
- MPASS(found);
- sx_xlock(&ifnet_detach_sxlock);
- error = if_vmove(ifp, vnet_dst);
- sx_xunlock(&ifnet_detach_sxlock);
- CURVNET_RESTORE();
- /* Report the new if_xname back to the userland on success. */
- if (error == 0)
- sprintf(ifname, "%s", ifp->if_xname);
- prison_free(pr);
- return (error);
- }
- #endif /* VIMAGE */
- /*
- * Add a group to an interface
- */
- int
- if_addgroup(struct ifnet *ifp, const char *groupname)
- {
- struct ifg_list *ifgl;
- struct ifg_group *ifg = NULL;
- struct ifg_member *ifgm;
- int new = 0;
- if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
- groupname[strlen(groupname) - 1] <= '9')
- return (EINVAL);
- IFNET_WLOCK();
- CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
- if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
- IFNET_WUNLOCK();
- return (EEXIST);
- }
- if ((ifgl = malloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) {
- IFNET_WUNLOCK();
- return (ENOMEM);
- }
- if ((ifgm = malloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) {
- free(ifgl, M_TEMP);
- IFNET_WUNLOCK();
- return (ENOMEM);
- }
- CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
- if (!strcmp(ifg->ifg_group, groupname))
- break;
- if (ifg == NULL) {
- if ((ifg = malloc(sizeof(*ifg), M_TEMP, M_NOWAIT)) == NULL) {
- free(ifgl, M_TEMP);
- free(ifgm, M_TEMP);
- IFNET_WUNLOCK();
- return (ENOMEM);
- }
- strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
- ifg->ifg_refcnt = 0;
- CK_STAILQ_INIT(&ifg->ifg_members);
- CK_STAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
- new = 1;
- }
- ifg->ifg_refcnt++;
- ifgl->ifgl_group = ifg;
- ifgm->ifgm_ifp = ifp;
- IF_ADDR_WLOCK(ifp);
- CK_STAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
- CK_STAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
- IF_ADDR_WUNLOCK(ifp);
- IFNET_WUNLOCK();
- if (new)
- EVENTHANDLER_INVOKE(group_attach_event, ifg);
- EVENTHANDLER_INVOKE(group_change_event, groupname);
- return (0);
- }
- /*
- * Helper function to remove a group out of an interface. Expects the global
- * ifnet lock to be write-locked, and drops it before returning.
- */
- static void
- _if_delgroup_locked(struct ifnet *ifp, struct ifg_list *ifgl,
- const char *groupname)
- {
- struct ifg_member *ifgm;
- bool freeifgl;
- IFNET_WLOCK_ASSERT();
- IF_ADDR_WLOCK(ifp);
- CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next);
- IF_ADDR_WUNLOCK(ifp);
- CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) {
- if (ifgm->ifgm_ifp == ifp) {
- CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
- ifg_member, ifgm_next);
- break;
- }
- }
- if (--ifgl->ifgl_group->ifg_refcnt == 0) {
- CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group,
- ifg_next);
- freeifgl = true;
- } else {
- freeifgl = false;
- }
- IFNET_WUNLOCK();
- NET_EPOCH_WAIT();
- EVENTHANDLER_INVOKE(group_change_event, groupname);
- if (freeifgl) {
- EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
- free(ifgl->ifgl_group, M_TEMP);
- }
- free(ifgm, M_TEMP);
- free(ifgl, M_TEMP);
- }
- /*
- * Remove a group from an interface
- */
- int
- if_delgroup(struct ifnet *ifp, const char *groupname)
- {
- struct ifg_list *ifgl;
- IFNET_WLOCK();
- CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
- if (strcmp(ifgl->ifgl_group->ifg_group, groupname) == 0)
- break;
- if (ifgl == NULL) {
- IFNET_WUNLOCK();
- return (ENOENT);
- }
- _if_delgroup_locked(ifp, ifgl, groupname);
- return (0);
- }
- /*
- * Remove an interface from all groups
- */
- static void
- if_delgroups(struct ifnet *ifp)
- {
- struct ifg_list *ifgl;
- char groupname[IFNAMSIZ];
- IFNET_WLOCK();
- while ((ifgl = CK_STAILQ_FIRST(&ifp->if_groups)) != NULL) {
- strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
- _if_delgroup_locked(ifp, ifgl, groupname);
- IFNET_WLOCK();
- }
- IFNET_WUNLOCK();
- }
- /*
- * Stores all groups from an interface in memory pointed to by ifgr.
- */
- static int
- if_getgroup(struct ifgroupreq *ifgr, struct ifnet *ifp)
- {
- int len, error;
- struct ifg_list *ifgl;
- struct ifg_req ifgrq, *ifgp;
- NET_EPOCH_ASSERT();
- if (ifgr->ifgr_len == 0) {
- CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
- ifgr->ifgr_len += sizeof(struct ifg_req);
- return (0);
- }
- len = ifgr->ifgr_len;
- ifgp = ifgr->ifgr_groups;
- /* XXX: wire */
- CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
- if (len < sizeof(ifgrq))
- return (EINVAL);
- bzero(&ifgrq, sizeof ifgrq);
- strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
- sizeof(ifgrq.ifgrq_group));
- if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req))))
- return (error);
- len -= sizeof(ifgrq);
- ifgp++;
- }
- return (0);
- }
- /*
- * Stores all members of a group in memory pointed to by igfr
- */
- static int
- if_getgroupmembers(struct ifgroupreq *ifgr)
- {
- struct ifg_group *ifg;
- struct ifg_member *ifgm;
- struct ifg_req ifgrq, *ifgp;
- int len, error;
- IFNET_RLOCK();
- CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
- if (strcmp(ifg->ifg_group, ifgr->ifgr_name) == 0)
- break;
- if (ifg == NULL) {
- IFNET_RUNLOCK();
- return (ENOENT);
- }
- if (ifgr->ifgr_len == 0) {
- CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
- ifgr->ifgr_len += sizeof(ifgrq);
- IFNET_RUNLOCK();
- return (0);
- }
- len = ifgr->ifgr_len;
- ifgp = ifgr->ifgr_groups;
- CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
- if (len < sizeof(ifgrq)) {
- IFNET_RUNLOCK();
- return (EINVAL);
- }
- bzero(&ifgrq, sizeof ifgrq);
- strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
- sizeof(ifgrq.ifgrq_member));
- if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
- IFNET_RUNLOCK();
- return (error);
- }
- len -= sizeof(ifgrq);
- ifgp++;
- }
- IFNET_RUNLOCK();
- return (0);
- }
- /*
- * Return counter values from counter(9)s stored in ifnet.
- */
- uint64_t
- if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
- {
- KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
- return (counter_u64_fetch(ifp->if_counters[cnt]));
- }
- /*
- * Increase an ifnet counter. Usually used for counters shared
- * between the stack and a driver, but function supports them all.
- */
- void
- if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
- {
- KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
- counter_u64_add(ifp->if_counters[cnt], inc);
- }
- /*
- * Copy data from ifnet to userland API structure if_data.
- */
- void
- if_data_copy(struct ifnet *ifp, struct if_data *ifd)
- {
- ifd->ifi_type = ifp->if_type;
- ifd->ifi_physical = 0;
- ifd->ifi_addrlen = ifp->if_addrlen;
- ifd->ifi_hdrlen = ifp->if_hdrlen;
- ifd->ifi_link_state = ifp->if_link_state;
- ifd->ifi_vhid = 0;
- ifd->ifi_datalen = sizeof(struct if_data);
- ifd->ifi_mtu = ifp->if_mtu;
- ifd->ifi_metric = ifp->if_metric;
- ifd->ifi_baudrate = ifp->if_baudrate;
- ifd->ifi_hwassist = ifp->if_hwassist;
- ifd->ifi_epoch = ifp->if_epoch;
- ifd->ifi_lastchange = ifp->if_lastchange;
- ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
- ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
- ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
- ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
- ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
- ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
- ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
- ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
- ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
- ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
- ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
- ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
- }
- /*
- * Initialization, destruction and refcounting functions for ifaddrs.
- */
- struct ifaddr *
- ifa_alloc(size_t size, int flags)
- {
- struct ifaddr *ifa;
- KASSERT(size >= sizeof(struct ifaddr),
- ("%s: invalid size %zu", __func__, size));
- ifa = malloc(size, M_IFADDR, M_ZERO | flags);
- if (ifa == NULL)
- return (NULL);
- if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
- goto fail;
- if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
- goto fail;
- if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
- goto fail;
- if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
- goto fail;
- refcount_init(&ifa->ifa_refcnt, 1);
- return (ifa);
- fail:
- /* free(NULL) is okay */
- counter_u64_free(ifa->ifa_opackets);
- counter_u64_free(ifa->ifa_ipackets);
- counter_u64_free(ifa->ifa_obytes);
- counter_u64_free(ifa->ifa_ibytes);
- free(ifa, M_IFADDR);
- return (NULL);
- }
- void
- ifa_ref(struct ifaddr *ifa)
- {
- u_int old __diagused;
- old = refcount_acquire(&ifa->ifa_refcnt);
- KASSERT(old > 0, ("%s: ifa %p has 0 refs", __func__, ifa));
- }
- int
- ifa_try_ref(struct ifaddr *ifa)
- {
- NET_EPOCH_ASSERT();
- return (refcount_acquire_if_not_zero(&ifa->ifa_refcnt));
- }
- static void
- ifa_destroy(epoch_context_t ctx)
- {
- struct ifaddr *ifa;
- ifa = __containerof(ctx, struct ifaddr, ifa_epoch_ctx);
- counter_u64_free(ifa->ifa_opackets);
- counter_u64_free(ifa->ifa_ipackets);
- counter_u64_free(ifa->ifa_obytes);
- counter_u64_free(ifa->ifa_ibytes);
- free(ifa, M_IFADDR);
- }
- void
- ifa_free(struct ifaddr *ifa)
- {
- if (refcount_release(&ifa->ifa_refcnt))
- NET_EPOCH_CALL(ifa_destroy, &ifa->ifa_epoch_ctx);
- }
- /*
- * XXX: Because sockaddr_dl has deeper structure than the sockaddr
- * structs used to represent other address families, it is necessary
- * to perform a different comparison.
- */
- #define sa_dl_equal(a1, a2) \
- ((((const struct sockaddr_dl *)(a1))->sdl_len == \
- ((const struct sockaddr_dl *)(a2))->sdl_len) && \
- (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
- CLLADDR((const struct sockaddr_dl *)(a2)), \
- ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
- /*
- * Locate an interface based on a complete address.
- */
- /*ARGSUSED*/
- struct ifaddr *
- ifa_ifwithaddr(const struct sockaddr *addr)
- {
- struct ifnet *ifp;
- struct ifaddr *ifa;
- NET_EPOCH_ASSERT();
- CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
- CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
- if (ifa->ifa_addr->sa_family != addr->sa_family)
- continue;
- if (sa_equal(addr, ifa->ifa_addr)) {
- goto done;
- }
- /* IP6 doesn't have broadcast */
- if ((ifp->if_flags & IFF_BROADCAST) &&
- ifa->ifa_broadaddr &&
- ifa->ifa_broadaddr->sa_len != 0 &&
- sa_equal(ifa->ifa_broadaddr, addr)) {
- goto done;
- }
- }
- }
- ifa = NULL;
- done:
- return (ifa);
- }
- int
- ifa_ifwithaddr_check(const struct sockaddr *addr)
- {
- struct epoch_tracker et;
- int rc;
- NET_EPOCH_ENTER(et);
- rc = (ifa_ifwithaddr(addr) != NULL);
- NET_EPOCH_EXIT(et);
- return (rc);
- }
- /*
- * Locate an interface based on the broadcast address.
- */
- /* ARGSUSED */
- struct ifaddr *
- ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
- {
- struct ifnet *ifp;
- struct ifaddr *ifa;
- NET_EPOCH_ASSERT();
- CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
- if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
- continue;
- CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
- if (ifa->ifa_addr->sa_family != addr->sa_family)
- continue;
- if ((ifp->if_flags & IFF_BROADCAST) &&
- ifa->ifa_broadaddr &&
- ifa->ifa_broadaddr->sa_len != 0 &&
- sa_equal(ifa->ifa_broadaddr, addr)) {
- goto done;
- }
- }
- }
- ifa = NULL;
- done:
- return (ifa);
- }
- /*
- * Locate the point to point interface with a given destination address.
- */
- /*ARGSUSED*/
- struct ifaddr *
- ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
- {
- struct ifnet *ifp;
- struct ifaddr *ifa;
- NET_EPOCH_ASSERT();
- CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
- if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
- continue;
- if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
- continue;
- CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
- if (ifa->ifa_addr->sa_family != addr->sa_family)
- continue;
- if (ifa->ifa_dstaddr != NULL &&
- sa_equal(addr, ifa->ifa_dstaddr)) {
- goto done;
- }
- }
- }
- ifa = NULL;
- done:
- return (ifa);
- }
- /*
- * Find an interface on a specific network. If many, choice
- * is most specific found.
- */
- struct ifaddr *
- ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
- {
- struct ifnet *ifp;
- struct ifaddr *ifa;
- struct ifaddr *ifa_maybe = NULL;
- u_int af = addr->sa_family;
- const char *addr_data = addr->sa_data, *cplim;
- NET_EPOCH_ASSERT();
- /*
- * AF_LINK addresses can be looked up directly by their index number,
- * so do that if we can.
- */
- if (af == AF_LINK) {
- ifp = ifnet_byindex(
- ((const struct sockaddr_dl *)addr)->sdl_index);
- return (ifp ? ifp->if_addr : NULL);
- }
- /*
- * Scan though each interface, looking for ones that have addresses
- * in this address family and the requested fib.
- */
- CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
- if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
- continue;
- CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
- const char *cp, *cp2, *cp3;
- if (ifa->ifa_addr->sa_family != af)
- next: continue;
- if (af == AF_INET &&
- ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
- /*
- * This is a bit broken as it doesn't
- * take into account that the remote end may
- * be a single node in the network we are
- * looking for.
- * The trouble is that we don't know the
- * netmask for the remote end.
- */
- if (ifa->ifa_dstaddr != NULL &&
- sa_equal(addr, ifa->ifa_dstaddr)) {
- goto done;
- }
- } else {
- /*
- * Scan all the bits in the ifa's address.
- * If a bit dissagrees with what we are
- * looking for, mask it with the netmask
- * to see if it really matters.
- * (A byte at a time)
- */
- if (ifa->ifa_netmask == 0)
- continue;
- cp = addr_data;
- cp2 = ifa->ifa_addr->sa_data;
- cp3 = ifa->ifa_netmask->sa_data;
- cplim = ifa->ifa_netmask->sa_len
- + (char *)ifa->ifa_netmask;
- while (cp3 < cplim)
- if ((*cp++ ^ *cp2++) & *cp3++)
- goto next; /* next address! */
- /*
- * If the netmask of what we just found
- * is more specific than what we had before
- * (if we had one), or if the virtual status
- * of new prefix is better than of the old one,
- * then remember the new one before continuing
- * to search for an even better one.
- */
- if (ifa_maybe == NULL ||
- ifa_preferred(ifa_maybe, ifa) ||
- rn_refines((caddr_t)ifa->ifa_netmask,
- (caddr_t)ifa_maybe->ifa_netmask)) {
- ifa_maybe = ifa;
- }
- }
- }
- }
- ifa = ifa_maybe;
- ifa_maybe = NULL;
- done:
- return (ifa);
- }
- /*
- * Find an interface address specific to an interface best matching
- * a given address.
- */
- struct ifaddr *
- ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
- {
- struct ifaddr *ifa;
- const char *cp, *cp2, *cp3;
- char *cplim;
- struct ifaddr *ifa_maybe = NULL;
- u_int af = addr->sa_family;
- if (af >= AF_MAX)
- return (NULL);
- NET_EPOCH_ASSERT();
- CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
- if (ifa->ifa_addr->sa_family != af)
- continue;
- if (ifa_maybe == NULL)
- ifa_maybe = ifa;
- if (ifa->ifa_netmask == 0) {
- if (sa_equal(addr, ifa->ifa_addr) ||
- (ifa->ifa_dstaddr &&
- sa_equal(addr, ifa->ifa_dstaddr)))
- goto done;
- continue;
- }
- if (ifp->if_flags & IFF_POINTOPOINT) {
- if (ifa->ifa_dstaddr && sa_equal(addr, ifa->ifa_dstaddr))
- goto done;
- } else {
- cp = addr->sa_data;
- cp2 = ifa->ifa_addr->sa_data;
- cp3 = ifa->ifa_netmask->sa_data;
- cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
- for (; cp3 < cplim; cp3++)
- if ((*cp++ ^ *cp2++) & *cp3)
- break;
- if (cp3 == cplim)
- goto done;
- }
- }
- ifa = ifa_maybe;
- done:
- return (ifa);
- }
- /*
- * See whether new ifa is better than current one:
- * 1) A non-virtual one is preferred over virtual.
- * 2) A virtual in master state preferred over any other state.
- *
- * Used in several address selecting functions.
- */
- int
- ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
- {
- return (cur->ifa_carp && (!next->ifa_carp ||
- ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
- }
- struct sockaddr_dl *
- link_alloc_sdl(size_t size, int flags)
- {
- return (malloc(size, M_TEMP, flags));
- }
- void
- link_free_sdl(struct sockaddr *sa)
- {
- free(sa, M_TEMP);
- }
- /*
- * Fills in given sdl with interface basic info.
- * Returns pointer to filled sdl.
- */
- struct sockaddr_dl *
- link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
- {
- struct sockaddr_dl *sdl;
- sdl = (struct sockaddr_dl *)paddr;
- memset(sdl, 0, sizeof(struct sockaddr_dl));
- sdl->sdl_len = sizeof(struct sockaddr_dl);
- sdl->sdl_family = AF_LINK;
- sdl->sdl_index = ifp->if_index;
- sdl->sdl_type = iftype;
- return (sdl);
- }
- /*
- * Mark an interface down and notify protocols of
- * the transition.
- */
- static void
- if_unroute(struct ifnet *ifp, int flag, int fam)
- {
- KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
- ifp->if_flags &= ~flag;
- getmicrotime(&ifp->if_lastchange);
- ifp->if_qflush(ifp);
- if (ifp->if_carp)
- (*carp_linkstate_p)(ifp);
- rt_ifmsg(ifp, IFF_UP);
- }
- void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
- void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
- struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
- struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
- int (*vlan_tag_p)(struct ifnet *, uint16_t *);
- int (*vlan_pcp_p)(struct ifnet *, uint16_t *);
- int (*vlan_setcookie_p)(struct ifnet *, void *);
- void *(*vlan_cookie_p)(struct ifnet *);
- /*
- * Handle a change in the interface link state. To avoid LORs
- * between driver lock and upper layer locks, as well as possible
- * recursions, we post event to taskqueue, and all job
- * is done in static do_link_state_change().
- */
- void
- if_link_state_change(struct ifnet *ifp, int link_state)
- {
- /* Return if state hasn't changed. */
- if (ifp->if_link_state == link_state)
- return;
- ifp->if_link_state = link_state;
- /* XXXGL: reference ifp? */
- taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
- }
- static void
- do_link_state_change(void *arg, int pending)
- {
- struct ifnet *ifp;
- int link_state;
- ifp = arg;
- link_state = ifp->if_link_state;
- CURVNET_SET(ifp->if_vnet);
- rt_ifmsg(ifp, 0);
- if (ifp->if_vlantrunk != NULL)
- (*vlan_link_state_p)(ifp);
- if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
- ifp->if_l2com != NULL)
- (*ng_ether_link_state_p)(ifp, link_state);
- if (ifp->if_carp)
- (*carp_linkstate_p)(ifp);
- if (ifp->if_bridge)
- ifp->if_bridge_linkstate(ifp);
- if (ifp->if_lagg)
- (*lagg_linkstate_p)(ifp, link_state);
- if (IS_DEFAULT_VNET(curvnet))
- devctl_notify("IFNET", ifp->if_xname,
- (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
- NULL);
- if (pending > 1)
- if_printf(ifp, "%d link states coalesced\n", pending);
- if (log_link_state_change)
- if_printf(ifp, "link state changed to %s\n",
- (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
- EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state);
- CURVNET_RESTORE();
- }
- /*
- * Mark an interface down and notify protocols of
- * the transition.
- */
- void
- if_down(struct ifnet *ifp)
- {
- EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN);
- if_unroute(ifp, IFF_UP, AF_UNSPEC);
- }
- /*
- * Mark an interface up and notify protocols of
- * the transition.
- */
- void
- if_up(struct ifnet *ifp)
- {
- ifp->if_flags |= IFF_UP;
- getmicrotime(&ifp->if_lastchange);
- if (ifp->if_carp)
- (*carp_linkstate_p)(ifp);
- rt_ifmsg(ifp, IFF_UP);
- EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP);
- }
- /*
- * Flush an interface queue.
- */
- void
- if_qflush(struct ifnet *ifp)
- {
- struct mbuf *m, *n;
- struct ifaltq *ifq;
- ifq = &ifp->if_snd;
- IFQ_LOCK(ifq);
- #ifdef ALTQ
- if (ALTQ_IS_ENABLED(ifq))
- ALTQ_PURGE(ifq);
- #endif
- n = ifq->ifq_head;
- while ((m = n) != NULL) {
- n = m->m_nextpkt;
- m_freem(m);
- }
- ifq->ifq_head = 0;
- ifq->ifq_tail = 0;
- ifq->ifq_len = 0;
- IFQ_UNLOCK(ifq);
- }
- /*
- * Map interface name to interface structure pointer, with or without
- * returning a reference.
- */
- struct ifnet *
- ifunit_ref(const char *name)
- {
- struct epoch_tracker et;
- struct ifnet *ifp;
- NET_EPOCH_ENTER(et);
- CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
- if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
- !(ifp->if_flags & IFF_DYING))
- break;
- }
- if (ifp != NULL) {
- if_ref(ifp);
- MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
- }
- NET_EPOCH_EXIT(et);
- return (ifp);
- }
- struct ifnet *
- ifunit(const char *name)
- {
- struct epoch_tracker et;
- struct ifnet *ifp;
- NET_EPOCH_ENTER(et);
- CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
- if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
- break;
- }
- NET_EPOCH_EXIT(et);
- return (ifp);
- }
- void *
- ifr_buffer_get_buffer(void *data)
- {
- union ifreq_union *ifrup;
- ifrup = data;
- #ifdef COMPAT_FREEBSD32
- if (SV_CURPROC_FLAG(SV_ILP32))
- return ((void *)(uintptr_t)
- ifrup->ifr32.ifr_ifru.ifru_buffer.buffer);
- #endif
- return (ifrup->ifr.ifr_ifru.ifru_buffer.buffer);
- }
- static void
- ifr_buffer_set_buffer_null(void *data)
- {
- union ifreq_union *ifrup;
- ifrup = data;
- #ifdef COMPAT_FREEBSD32
- if (SV_CURPROC_FLAG(SV_ILP32))
- ifrup->ifr32.ifr_ifru.ifru_buffer.buffer = 0;
- else
- #endif
- ifrup->ifr.ifr_ifru.ifru_buffer.buffer = NULL;
- }
- size_t
- ifr_buffer_get_length(void *data)
- {
- union ifreq_union *ifrup;
- ifrup = data;
- #ifdef COMPAT_FREEBSD32
- if (SV_CURPROC_FLAG(SV_ILP32))
- return (ifrup->ifr32.ifr_ifru.ifru_buffer.length);
- #endif
- return (ifrup->ifr.ifr_ifru.ifru_buffer.length);
- }
- static void
- ifr_buffer_set_length(void *data, size_t len)
- {
- union ifreq_union *ifrup;
- ifrup = data;
- #ifdef COMPAT_FREEBSD32
- if (SV_CURPROC_FLAG(SV_ILP32))
- ifrup->ifr32.ifr_ifru.ifru_buffer.length = len;
- else
- #endif
- ifrup->ifr.ifr_ifru.ifru_buffer.length = len;
- }
- void *
- ifr_data_get_ptr(void *ifrp)
- {
- union ifreq_union *ifrup;
- ifrup = ifrp;
- #ifdef COMPAT_FREEBSD32
- if (SV_CURPROC_FLAG(SV_ILP32))
- return ((void *)(uintptr_t)
- ifrup->ifr32.ifr_ifru.ifru_data);
- #endif
- return (ifrup->ifr.ifr_ifru.ifru_data);
- }
- struct ifcap_nv_bit_name {
- uint64_t cap_bit;
- const char *cap_name;
- };
- #define CAPNV(x) {.cap_bit = IFCAP_##x, \
- .cap_name = __CONCAT(IFCAP_, __CONCAT(x, _NAME)) }
- const struct ifcap_nv_bit_name ifcap_nv_bit_names[] = {
- CAPNV(RXCSUM),
- CAPNV(TXCSUM),
- CAPNV(NETCONS),
- CAPNV(VLAN_MTU),
- CAPNV(VLAN_HWTAGGING),
- CAPNV(JUMBO_MTU),
- CAPNV(POLLING),
- CAPNV(VLAN_HWCSUM),
- CAPNV(TSO4),
- CAPNV(TSO6),
- CAPNV(LRO),
- CAPNV(WOL_UCAST),
- CAPNV(WOL_MCAST),
- CAPNV(WOL_MAGIC),
- CAPNV(TOE4),
- CAPNV(TOE6),
- CAPNV(VLAN_HWFILTER),
- CAPNV(VLAN_HWTSO),
- CAPNV(LINKSTATE),
- CAPNV(NETMAP),
- CAPNV(RXCSUM_IPV6),
- CAPNV(TXCSUM_IPV6),
- CAPNV(HWSTATS),
- CAPNV(TXRTLMT),
- CAPNV(HWRXTSTMP),
- CAPNV(MEXTPG),
- CAPNV(TXTLS4),
- CAPNV(TXTLS6),
- CAPNV(VXLAN_HWCSUM),
- CAPNV(VXLAN_HWTSO),
- CAPNV(TXTLS_RTLMT),
- {0, NULL}
- };
- #define CAP2NV(x) {.cap_bit = IFCAP2_BIT(IFCAP2_##x), \
- .cap_name = __CONCAT(IFCAP2_, __CONCAT(x, _NAME)) }
- const struct ifcap_nv_bit_name ifcap2_nv_bit_names[] = {
- CAP2NV(RXTLS4),
- CAP2NV(RXTLS6),
- CAP2NV(IPSEC_OFFLOAD),
- {0, NULL}
- };
- #undef CAPNV
- #undef CAP2NV
- int
- if_capnv_to_capint(const nvlist_t *nv, int *old_cap,
- const struct ifcap_nv_bit_name *nn, bool all)
- {
- int i, res;
- res = 0;
- for (i = 0; nn[i].cap_name != NULL; i++) {
- if (nvlist_exists_bool(nv, nn[i].cap_name)) {
- if (all || nvlist_get_bool(nv, nn[i].cap_name))
- res |= nn[i].cap_bit;
- } else {
- res |= *old_cap & nn[i].cap_bit;
- }
- }
- return (res);
- }
- void
- if_capint_to_capnv(nvlist_t *nv, const struct ifcap_nv_bit_name *nn,
- int ifr_cap, int ifr_req)
- {
- int i;
- for (i = 0; nn[i].cap_name != NULL; i++) {
- if ((nn[i].cap_bit & ifr_cap) != 0) {
- nvlist_add_bool(nv, nn[i].cap_name,
- (nn[i].cap_bit & ifr_req) != 0);
- }
- }
- }
- /*
- * Hardware specific interface ioctls.
- */
- int
- ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
- {
- struct ifreq *ifr;
- int error = 0, do_ifup = 0;
- int new_flags, temp_flags;
- size_t descrlen, nvbuflen;
- char *descrbuf;
- char new_name[IFNAMSIZ];
- void *buf;
- nvlist_t *nvcap;
- struct siocsifcapnv_driver_data drv_ioctl_data;
- ifr = (struct ifreq *)data;
- switch (cmd) {
- case SIOCGIFINDEX:
- ifr->ifr_index = ifp->if_index;
- break;
- case SIOCGIFFLAGS:
- temp_flags = ifp->if_flags | ifp->if_drv_flags;
- ifr->ifr_flags = temp_flags & 0xffff;
- ifr->ifr_flagshigh = temp_flags >> 16;
- break;
- case SIOCGIFCAP:
- ifr->ifr_reqcap = ifp->if_capabilities;
- ifr->ifr_curcap = ifp->if_capenable;
- break;
- case SIOCGIFCAPNV:
- if ((ifp->if_capabilities & IFCAP_NV) == 0) {
- error = EINVAL;
- break;
- }
- buf = NULL;
- nvcap = nvlist_create(0);
- for (;;) {
- if_capint_to_capnv(nvcap, ifcap_nv_bit_names,
- ifp->if_capabilities, ifp->if_capenable);
- if_capint_to_capnv(nvcap, ifcap2_nv_bit_names,
- ifp->if_capabilities2, ifp->if_capenable2);
- error = (*ifp->if_ioctl)(ifp, SIOCGIFCAPNV,
- __DECONST(caddr_t, nvcap));
- if (error != 0) {
- if_printf(ifp,
- "SIOCGIFCAPNV driver mistake: nvlist error %d\n",
- error);
- break;
- }
- buf = nvlist_pack(nvcap, &nvbuflen);
- if (buf == NULL) {
- error = nvlist_error(nvcap);
- if (error == 0)
- error = EDOOFUS;
- break;
- }
- if (nvbuflen > ifr->ifr_cap_nv.buf_length) {
- ifr->ifr_cap_nv.length = nvbuflen;
- ifr->ifr_cap_nv.buffer = NULL;
- error = EFBIG;
- break;
- }
- ifr->ifr_cap_nv.length = nvbuflen;
- error = copyout(buf, ifr->ifr_cap_nv.buffer, nvbuflen);
- break;
- }
- free(buf, M_NVLIST);
- nvlist_destroy(nvcap);
- break;
- case SIOCGIFDATA:
- {
- struct if_data ifd;
- /* Ensure uninitialised padding is not leaked. */
- memset(&ifd, 0, sizeof(ifd));
- if_data_copy(ifp, &ifd);
- error = copyout(&ifd, ifr_data_get_ptr(ifr), sizeof(ifd));
- break;
- }
- #ifdef MAC
- case SIOCGIFMAC:
- error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
- break;
- #endif
- case SIOCGIFMETRIC:
- ifr->ifr_metric = ifp->if_metric;
- break;
- case SIOCGIFMTU:
- ifr->ifr_mtu = ifp->if_mtu;
- break;
- case SIOCGIFPHYS:
- /* XXXGL: did this ever worked? */
- ifr->ifr_phys = 0;
- break;
- case SIOCGIFDESCR:
- error = 0;
- sx_slock(&ifdescr_sx);
- if (ifp->if_description == NULL)
- error = ENOMSG;
- else {
- /* space for terminating nul */
- descrlen = strlen(ifp->if_description) + 1;
- if (ifr_buffer_get_length(ifr) < descrlen)
- ifr_buffer_set_buffer_null(ifr);
- else
- error = copyout(ifp->if_description,
- ifr_buffer_get_buffer(ifr), descrlen);
- ifr_buffer_set_length(ifr, descrlen);
- }
- sx_sunlock(&ifdescr_sx);
- break;
- case SIOCSIFDESCR:
- error = priv_check(td, PRIV_NET_SETIFDESCR);
- if (error)
- return (error);
- /*
- * Copy only (length-1) bytes to make sure that
- * if_description is always nul terminated. The
- * length parameter is supposed to count the
- * terminating nul in.
- */
- if (ifr_buffer_get_length(ifr) > ifdescr_maxlen)
- return (ENAMETOOLONG);
- else if (ifr_buffer_get_length(ifr) == 0)
- descrbuf = NULL;
- else {
- descrbuf = if_allocdescr(ifr_buffer_get_length(ifr), M_WAITOK);
- error = copyin(ifr_buffer_get_buffer(ifr), descrbuf,
- ifr_buffer_get_length(ifr) - 1);
- if (error) {
- if_freedescr(descrbuf);
- break;
- }
- }
- if_setdescr(ifp, descrbuf);
- getmicrotime(&ifp->if_lastchange);
- break;
- case SIOCGIFFIB:
- ifr->ifr_fib = ifp->if_fib;
- break;
- case SIOCSIFFIB:
- error = priv_check(td, PRIV_NET_SETIFFIB);
- if (error)
- return (error);
- if (ifr->ifr_fib >= rt_numfibs)
- return (EINVAL);
- ifp->if_fib = ifr->ifr_fib;
- break;
- case SIOCSIFFLAGS:
- error = priv_check(td, PRIV_NET_SETIFFLAGS);
- if (error)
- return (error);
- /*
- * Currently, no driver owned flags pass the IFF_CANTCHANGE
- * check, so we don't need special handling here yet.
- */
- new_flags = (ifr->ifr_flags & 0xffff) |
- (ifr->ifr_flagshigh << 16);
- if (ifp->if_flags & IFF_UP &&
- (new_flags & IFF_UP) == 0) {
- if_down(ifp);
- } else if (new_flags & IFF_UP &&
- (ifp->if_flags & IFF_UP) == 0) {
- do_ifup = 1;
- }
- /* See if permanently promiscuous mode bit is about to flip */
- if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
- if (new_flags & IFF_PPROMISC)
- ifp->if_flags |= IFF_PROMISC;
- else if (ifp->if_pcount == 0)
- ifp->if_flags &= ~IFF_PROMISC;
- if (log_promisc_mode_change)
- if_printf(ifp, "permanently promiscuous mode %s\n",
- ((new_flags & IFF_PPROMISC) ?
- "enabled" : "disabled"));
- }
- ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
- (new_flags &~ IFF_CANTCHANGE);
- if (ifp->if_ioctl) {
- (void) (*ifp->if_ioctl)(ifp, cmd, data);
- }
- if (do_ifup)
- if_up(ifp);
- getmicrotime(&ifp->if_lastchange);
- break;
- case SIOCSIFCAP:
- error = priv_check(td, PRIV_NET_SETIFCAP);
- if (error != 0)
- return (error);
- if (ifp->if_ioctl == NULL)
- return (EOPNOTSUPP);
- if (ifr->ifr_reqcap & ~ifp->if_capabilities)
- return (EINVAL);
- error = (*ifp->if_ioctl)(ifp, cmd, data);
- if (error == 0)
- getmicrotime(&ifp->if_lastchange);
- break;
- case SIOCSIFCAPNV:
- error = priv_check(td, PRIV_NET_SETIFCAP);
- if (error != 0)
- return (error);
- if (ifp->if_ioctl == NULL)
- return (EOPNOTSUPP);
- if ((ifp->if_capabilities & IFCAP_NV) == 0)
- return (EINVAL);
- if (ifr->ifr_cap_nv.length > IFR_CAP_NV_MAXBUFSIZE)
- return (EINVAL);
- nvcap = NULL;
- buf = malloc(ifr->ifr_cap_nv.length, M_TEMP, M_WAITOK);
- for (;;) {
- error = copyin(ifr->ifr_cap_nv.buffer, buf,
- ifr->ifr_cap_nv.length);
- if (error != 0)
- break;
- nvcap = nvlist_unpack(buf, ifr->ifr_cap_nv.length, 0);
- if (nvcap == NULL) {
- error = EINVAL;
- break;
- }
- drv_ioctl_data.reqcap = if_capnv_to_capint(nvcap,
- &ifp->if_capenable, ifcap_nv_bit_names, false);
- if ((drv_ioctl_data.reqcap &
- ~ifp->if_capabilities) != 0) {
- error = EINVAL;
- break;
- }
- drv_ioctl_data.reqcap2 = if_capnv_to_capint(nvcap,
- &ifp->if_capenable2, ifcap2_nv_bit_names, false);
- if ((drv_ioctl_data.reqcap2 &
- ~ifp->if_capabilities2) != 0) {
- error = EINVAL;
- break;
- }
- drv_ioctl_data.nvcap = nvcap;
- error = (*ifp->if_ioctl)(ifp, SIOCSIFCAPNV,
- (caddr_t)&drv_ioctl_data);
- break;
- }
- nvlist_destroy(nvcap);
- free(buf, M_TEMP);
- if (error == 0)
- getmicrotime(&ifp->if_lastchange);
- break;
- #ifdef MAC
- case SIOCSIFMAC:
- error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
- break;
- #endif
- case SIOCSIFNAME:
- error = priv_check(td, PRIV_NET_SETIFNAME);
- if (error)
- return (error);
- error = copyinstr(ifr_data_get_ptr(ifr), new_name, IFNAMSIZ,
- NULL);
- if (error != 0)
- return (error);
- error = if_rename(ifp, new_name);
- break;
- #ifdef VIMAGE
- case SIOCSIFVNET:
- error = priv_check(td, PRIV_NET_SETIFVNET);
- if (error)
- return (error);
- error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
- break;
- #endif
- case SIOCSIFMETRIC:
- error = priv_check(td, PRIV_NET_SETIFMETRIC);
- if (error)
- return (error);
- ifp->if_metric = ifr->ifr_metric;
- getmicrotime(&ifp->if_lastchange);
- break;
- case SIOCSIFPHYS:
- error = priv_check(td, PRIV_NET_SETIFPHYS);
- if (error)
- return (error);
- if (ifp->if_ioctl == NULL)
- return (EOPNOTSUPP);
- error = (*ifp->if_ioctl)(ifp, cmd, data);
- if (error == 0)
- getmicrotime(&ifp->if_lastchange);
- break;
- case SIOCSIFMTU:
- {
- u_long oldmtu = ifp->if_mtu;
- error = priv_check(td, PRIV_NET_SETIFMTU);
- if (error)
- return (error);
- if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
- return (EINVAL);
- if (ifp->if_ioctl == NULL)
- return (EOPNOTSUPP);
- /* Disallow MTU changes on bridge member interfaces. */
- if (ifp->if_bridge)
- return (EOPNOTSUPP);
- error = (*ifp->if_ioctl)(ifp, cmd, data);
- if (error == 0) {
- getmicrotime(&ifp->if_lastchange);
- rt_ifmsg(ifp, 0);
- #ifdef INET
- DEBUGNET_NOTIFY_MTU(ifp);
- #endif
- }
- /*
- * If the link MTU changed, do network layer specific procedure.
- */
- if (ifp->if_mtu != oldmtu)
- if_notifymtu(ifp);
- break;
- }
- case SIOCADDMULTI:
- case SIOCDELMULTI:
- if (cmd == SIOCADDMULTI)
- error = priv_check(td, PRIV_NET_ADDMULTI);
- else
- error = priv_check(td, PRIV_NET_DELMULTI);
- if (error)
- return (error);
- /* Don't allow group membership on non-multicast interfaces. */
- if ((ifp->if_flags & IFF_MULTICAST) == 0)
- return (EOPNOTSUPP);
- /* Don't let users screw up protocols' entries. */
- if (ifr->ifr_addr.sa_family != AF_LINK)
- return (EINVAL);
- if (cmd == SIOCADDMULTI) {
- struct epoch_tracker et;
- struct ifmultiaddr *ifma;
- /*
- * Userland is only permitted to join groups once
- * via the if_addmulti() KPI, because it cannot hold
- * struct ifmultiaddr * between calls. It may also
- * lose a race while we check if the membership
- * already exists.
- */
- NET_EPOCH_ENTER(et);
- ifma = if_findmulti(ifp, &ifr->ifr_addr);
- NET_EPOCH_EXIT(et);
- if (ifma != NULL)
- error = EADDRINUSE;
- else
- error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
- } else {
- error = if_delmulti(ifp, &ifr->ifr_addr);
- }
- if (error == 0)
- getmicrotime(&ifp->if_lastchange);
- break;
- case SIOCSIFPHYADDR:
- case SIOCDIFPHYADDR:
- #ifdef INET6
- case SIOCSIFPHYADDR_IN6:
- #endif
- case SIOCSIFMEDIA:
- case SIOCSIFGENERIC:
- error = priv_check(td, PRIV_NET_HWIOCTL);
- if (error)
- return (error);
- if (ifp->if_ioctl == NULL)
- return (EOPNOTSUPP);
- error = (*ifp->if_ioctl)(ifp, cmd, data);
- if (error == 0)
- getmicrotime(&ifp->if_lastchange);
- break;
- case SIOCGIFSTATUS:
- case SIOCGIFPSRCADDR:
- case SIOCGIFPDSTADDR:
- case SIOCGIFMEDIA:
- case SIOCGIFXMEDIA:
- case SIOCGIFGENERIC:
- case SIOCGIFRSSKEY:
- case SIOCGIFRSSHASH:
- case SIOCGIFDOWNREASON:
- if (ifp->if_ioctl == NULL)
- return (EOPNOTSUPP);
- error = (*ifp->if_ioctl)(ifp, cmd, data);
- break;
- case SIOCSIFLLADDR:
- error = priv_check(td, PRIV_NET_SETLLADDR);
- if (error)
- return (error);
- error = if_setlladdr(ifp,
- ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
- break;
- case SIOCGHWADDR:
- error = if_gethwaddr(ifp, ifr);
- break;
- case SIOCAIFGROUP:
- error = priv_check(td, PRIV_NET_ADDIFGROUP);
- if (error)
- return (error);
- error = if_addgroup(ifp,
- ((struct ifgroupreq *)data)->ifgr_group);
- if (error != 0)
- return (error);
- break;
- case SIOCGIFGROUP:
- {
- struct epoch_tracker et;
- NET_EPOCH_ENTER(et);
- error = if_getgroup((struct ifgroupreq *)data, ifp);
- NET_EPOCH_EXIT(et);
- break;
- }
- case SIOCDIFGROUP:
- error = priv_check(td, PRIV_NET_DELIFGROUP);
- if (error)
- return (error);
- error = if_delgroup(ifp,
- ((struct ifgroupreq *)data)->ifgr_group);
- if (error != 0)
- return (error);
- break;
- default:
- error = ENOIOCTL;
- break;
- }
- return (error);
- }
- /*
- * Interface ioctls.
- */
- int
- ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
- {
- #ifdef COMPAT_FREEBSD32
- union {
- struct ifconf ifc;
- struct ifdrv ifd;
- struct ifgroupreq ifgr;
- struct ifmediareq ifmr;
- } thunk;
- u_long saved_cmd;
- struct ifconf32 *ifc32;
- struct ifdrv32 *ifd32;
- struct ifgroupreq32 *ifgr32;
- struct ifmediareq32 *ifmr32;
- #endif
- struct ifnet *ifp;
- struct ifreq *ifr;
- int error;
- int oif_flags;
- #ifdef VIMAGE
- bool shutdown;
- #endif
- CURVNET_SET(so->so_vnet);
- #ifdef VIMAGE
- /* Make sure the VNET is stable. */
- shutdown = VNET_IS_SHUTTING_DOWN(so->so_vnet);
- if (shutdown) {
- CURVNET_RESTORE();
- return (EBUSY);
- }
- #endif
- #ifdef COMPAT_FREEBSD32
- saved_cmd = cmd;
- switch (cmd) {
- case SIOCGIFCONF32:
- ifc32 = (struct ifconf32 *)data;
- thunk.ifc.ifc_len = ifc32->ifc_len;
- thunk.ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
- data = (caddr_t)&thunk.ifc;
- cmd = SIOCGIFCONF;
- break;
- case SIOCGDRVSPEC32:
- case SIOCSDRVSPEC32:
- ifd32 = (struct ifdrv32 *)data;
- memcpy(thunk.ifd.ifd_name, ifd32->ifd_name,
- sizeof(thunk.ifd.ifd_name));
- thunk.ifd.ifd_cmd = ifd32->ifd_cmd;
- thunk.ifd.ifd_len = ifd32->ifd_len;
- thunk.ifd.ifd_data = PTRIN(ifd32->ifd_data);
- data = (caddr_t)&thunk.ifd;
- cmd = _IOC_NEWTYPE(cmd, struct ifdrv);
- break;
- case SIOCAIFGROUP32:
- case SIOCGIFGROUP32:
- case SIOCDIFGROUP32:
- case SIOCGIFGMEMB32:
- ifgr32 = (struct ifgroupreq32 *)data;
- memcpy(thunk.ifgr.ifgr_name, ifgr32->ifgr_name,
- sizeof(thunk.ifgr.ifgr_name));
- thunk.ifgr.ifgr_len = ifgr32->ifgr_len;
- switch (cmd) {
- case SIOCAIFGROUP32:
- case SIOCDIFGROUP32:
- memcpy(thunk.ifgr.ifgr_group, ifgr32->ifgr_group,
- sizeof(thunk.ifgr.ifgr_group));
- break;
- case SIOCGIFGROUP32:
- case SIOCGIFGMEMB32:
- thunk.ifgr.ifgr_groups = PTRIN(ifgr32->ifgr_groups);
- break;
- }
- data = (caddr_t)&thunk.ifgr;
- cmd = _IOC_NEWTYPE(cmd, struct ifgroupreq);
- break;
- case SIOCGIFMEDIA32:
- case SIOCGIFXMEDIA32:
- ifmr32 = (struct ifmediareq32 *)data;
- memcpy(thunk.ifmr.ifm_name, ifmr32->ifm_name,
- sizeof(thunk.ifmr.ifm_name));
- thunk.ifmr.ifm_current = ifmr32->ifm_current;
- thunk.ifmr.ifm_mask = ifmr32->ifm_mask;
- thunk.ifmr.ifm_status = ifmr32->ifm_status;
- thunk.ifmr.ifm_active = ifmr32->ifm_active;
- thunk.ifmr.ifm_count = ifmr32->ifm_count;
- thunk.ifmr.ifm_ulist = PTRIN(ifmr32->ifm_ulist);
- data = (caddr_t)&thunk.ifmr;
- cmd = _IOC_NEWTYPE(cmd, struct ifmediareq);
- break;
- }
- #endif
- switch (cmd) {
- case SIOCGIFCONF:
- error = ifconf(cmd, data);
- goto out_noref;
- }
- ifr = (struct ifreq *)data;
- switch (cmd) {
- #ifdef VIMAGE
- case SIOCSIFRVNET:
- error = priv_check(td, PRIV_NET_SETIFVNET);
- if (error == 0)
- error = if_vmove_reclaim(td, ifr->ifr_name,
- ifr->ifr_jid);
- goto out_noref;
- #endif
- case SIOCIFCREATE:
- case SIOCIFCREATE2:
- error = priv_check(td, PRIV_NET_IFCREATE);
- if (error == 0)
- error = if_clone_create(ifr->ifr_name,
- sizeof(ifr->ifr_name), cmd == SIOCIFCREATE2 ?
- ifr_data_get_ptr(ifr) : NULL);
- goto out_noref;
- case SIOCIFDESTROY:
- error = priv_check(td, PRIV_NET_IFDESTROY);
- if (error == 0) {
- sx_xlock(&ifnet_detach_sxlock);
- error = if_clone_destroy(ifr->ifr_name);
- sx_xunlock(&ifnet_detach_sxlock);
- }
- goto out_noref;
- case SIOCIFGCLONERS:
- error = if_clone_list((struct if_clonereq *)data);
- goto out_noref;
- case SIOCGIFGMEMB:
- error = if_getgroupmembers((struct ifgroupreq *)data);
- goto out_noref;
- #if defined(INET) || defined(INET6)
- case SIOCSVH:
- case SIOCGVH:
- if (carp_ioctl_p == NULL)
- error = EPROTONOSUPPORT;
- else
- error = (*carp_ioctl_p)(ifr, cmd, td);
- goto out_noref;
- #endif
- }
- ifp = ifunit_ref(ifr->ifr_name);
- if (ifp == NULL) {
- error = ENXIO;
- goto out_noref;
- }
- error = ifhwioctl(cmd, ifp, data, td);
- if (error != ENOIOCTL)
- goto out_ref;
- oif_flags = ifp->if_flags;
- if (so->so_proto == NULL) {
- error = EOPNOTSUPP;
- goto out_ref;
- }
- /*
- * Pass the request on to the socket control method, and if the
- * latter returns EOPNOTSUPP, directly to the interface.
- *
- * Make an exception for the legacy SIOCSIF* requests. Drivers
- * trust SIOCSIFADDR et al to come from an already privileged
- * layer, and do not perform any credentials checks or input
- * validation.
- */
- error = so->so_proto->pr_control(so, cmd, data, ifp, td);
- if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
- cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
- cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
- error = (*ifp->if_ioctl)(ifp, cmd, data);
- if (!(oif_flags & IFF_UP) && (ifp->if_flags & IFF_UP))
- if_up(ifp);
- out_ref:
- if_rele(ifp);
- out_noref:
- CURVNET_RESTORE();
- #ifdef COMPAT_FREEBSD32
- if (error != 0)
- return (error);
- switch (saved_cmd) {
- case SIOCGIFCONF32:
- ifc32->ifc_len = thunk.ifc.ifc_len;
- break;
- case SIOCGDRVSPEC32:
- /*
- * SIOCGDRVSPEC is IOWR, but nothing actually touches
- * the struct so just assert that ifd_len (the only
- * field it might make sense to update) hasn't
- * changed.
- */
- KASSERT(thunk.ifd.ifd_len == ifd32->ifd_len,
- ("ifd_len was updated %u -> %zu", ifd32->ifd_len,
- thunk.ifd.ifd_len));
- break;
- case SIOCGIFGROUP32:
- case SIOCGIFGMEMB32:
- ifgr32->ifgr_len = thunk.ifgr.ifgr_len;
- break;
- case SIOCGIFMEDIA32:
- case SIOCGIFXMEDIA32:
- ifmr32->ifm_current = thunk.ifmr.ifm_current;
- ifmr32->ifm_mask = thunk.ifmr.ifm_mask;
- ifmr32->ifm_status = thunk.ifmr.ifm_status;
- ifmr32->ifm_active = thunk.ifmr.ifm_active;
- ifmr32->ifm_count = thunk.ifmr.ifm_count;
- break;
- }
- #endif
- return (error);
- }
- int
- if_rename(struct ifnet *ifp, char *new_name)
- {
- struct ifaddr *ifa;
- struct sockaddr_dl *sdl;
- size_t namelen, onamelen;
- char old_name[IFNAMSIZ];
- char strbuf[IFNAMSIZ + 8];
- if (new_name[0] == '\0')
- return (EINVAL);
- if (strcmp(new_name, ifp->if_xname) == 0)
- return (0);
- if (ifunit(new_name) != NULL)
- return (EEXIST);
- /*
- * XXX: Locking. Nothing else seems to lock if_flags,
- * and there are numerous other races with the
- * ifunit() checks not being atomic with namespace
- * changes (renames, vmoves, if_attach, etc).
- */
- ifp->if_flags |= IFF_RENAMING;
- EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
- if_printf(ifp, "changing name to '%s'\n", new_name);
- IF_ADDR_WLOCK(ifp);
- strlcpy(old_name, ifp->if_xname, sizeof(old_name));
- strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
- ifa = ifp->if_addr;
- sdl = (struct sockaddr_dl *)ifa->ifa_addr;
- namelen = strlen(new_name);
- onamelen = sdl->sdl_nlen;
- /*
- * Move the address if needed. This is safe because we
- * allocate space for a name of length IFNAMSIZ when we
- * create this in if_attach().
- */
- if (namelen != onamelen) {
- bcopy(sdl->sdl_data + onamelen,
- sdl->sdl_data + namelen, sdl->sdl_alen);
- }
- bcopy(new_name, sdl->sdl_data, namelen);
- sdl->sdl_nlen = namelen;
- sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
- bzero(sdl->sdl_data, onamelen);
- while (namelen != 0)
- sdl->sdl_data[--namelen] = 0xff;
- IF_ADDR_WUNLOCK(ifp);
- EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
- ifp->if_flags &= ~IFF_RENAMING;
- snprintf(strbuf, sizeof(strbuf), "name=%s", new_name);
- devctl_notify("IFNET", old_name, "RENAME", strbuf);
- return (0);
- }
- /*
- * The code common to handling reference counted flags,
- * e.g., in ifpromisc() and if_allmulti().
- * The "pflag" argument can specify a permanent mode flag to check,
- * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
- *
- * Only to be used on stack-owned flags, not driver-owned flags.
- */
- static int
- if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
- {
- struct ifreq ifr;
- int error;
- int oldflags, oldcount;
- /* Sanity checks to catch programming errors */
- KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
- ("%s: setting driver-owned flag %d", __func__, flag));
- if (onswitch)
- KASSERT(*refcount >= 0,
- ("%s: increment negative refcount %d for flag %d",
- __func__, *refcount, flag));
- else
- KASSERT(*refcount > 0,
- ("%s: decrement non-positive refcount %d for flag %d",
- __func__, *refcount, flag));
- /* In case this mode is permanent, just touch refcount */
- if (ifp->if_flags & pflag) {
- *refcount += onswitch ? 1 : -1;
- return (0);
- }
- /* Save ifnet parameters for if_ioctl() may fail */
- oldcount = *refcount;
- oldflags = ifp->if_flags;
- /*
- * See if we aren't the only and touching refcount is enough.
- * Actually toggle interface flag if we are the first or last.
- */
- if (onswitch) {
- if ((*refcount)++)
- return (0);
- ifp->if_flags |= flag;
- } else {
- if (--(*refcount))
- return (0);
- ifp->if_flags &= ~flag;
- }
- /* Call down the driver since we've changed interface flags */
- if (ifp->if_ioctl == NULL) {
- error = EOPNOTSUPP;
- goto recover;
- }
- ifr.ifr_flags = ifp->if_flags & 0xffff;
- ifr.ifr_flagshigh = ifp->if_flags >> 16;
- error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
- if (error)
- goto recover;
- /* Notify userland that interface flags have changed */
- rt_ifmsg(ifp, flag);
- return (0);
- recover:
- /* Recover after driver error */
- *refcount = oldcount;
- ifp->if_flags = oldflags;
- return (error);
- }
- /*
- * Set/clear promiscuous mode on interface ifp based on the truth value
- * of pswitch. The calls are reference counted so that only the first
- * "on" request actually has an effect, as does the final "off" request.
- * Results are undefined if the "off" and "on" requests are not matched.
- */
- int
- ifpromisc(struct ifnet *ifp, int pswitch)
- {
- int error;
- int oldflags = ifp->if_flags;
- error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
- &ifp->if_pcount, pswitch);
- /* If promiscuous mode status has changed, log a message */
- if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
- log_promisc_mode_change)
- if_printf(ifp, "promiscuous mode %s\n",
- (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
- return (error);
- }
- /*
- * Return interface configuration
- * of system. List may be used
- * in later ioctl's (above) to get
- * other information.
- */
- /*ARGSUSED*/
- static int
- ifconf(u_long cmd, caddr_t data)
- {
- struct ifconf *ifc = (struct ifconf *)data;
- struct ifnet *ifp;
- struct ifaddr *ifa;
- struct ifreq ifr;
- struct sbuf *sb;
- int error, full = 0, valid_len, max_len;
- /* Limit initial buffer size to maxphys to avoid DoS from userspace. */
- max_len = maxphys - 1;
- /* Prevent hostile input from being able to crash the system */
- if (ifc->ifc_len <= 0)
- return (EINVAL);
- again:
- if (ifc->ifc_len <= max_len) {
- max_len = ifc->ifc_len;
- full = 1;
- }
- sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
- max_len = 0;
- valid_len = 0;
- IFNET_RLOCK();
- CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
- struct epoch_tracker et;
- int addrs;
- /*
- * Zero the ifr to make sure we don't disclose the contents
- * of the stack.
- */
- memset(&ifr, 0, sizeof(ifr));
- if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
- >= sizeof(ifr.ifr_name)) {
- sbuf_delete(sb);
- IFNET_RUNLOCK();
- return (ENAMETOOLONG);
- }
- addrs = 0;
- NET_EPOCH_ENTER(et);
- CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
- struct sockaddr *sa = ifa->ifa_addr;
- if (prison_if(curthread->td_ucred, sa) != 0)
- continue;
- addrs++;
- if (sa->sa_len <= sizeof(*sa)) {
- if (sa->sa_len < sizeof(*sa)) {
- memset(&ifr.ifr_ifru.ifru_addr, 0,
- sizeof(ifr.ifr_ifru.ifru_addr));
- memcpy(&ifr.ifr_ifru.ifru_addr, sa,
- sa->sa_len);
- } else
- ifr.ifr_ifru.ifru_addr = *sa;
- sbuf_bcat(sb, &ifr, sizeof(ifr));
- max_len += sizeof(ifr);
- } else {
- sbuf_bcat(sb, &ifr,
- offsetof(struct ifreq, ifr_addr));
- max_len += offsetof(struct ifreq, ifr_addr);
- sbuf_bcat(sb, sa, sa->sa_len);
- max_len += sa->sa_len;
- }
- if (sbuf_error(sb) == 0)
- valid_len = sbuf_len(sb);
- }
- NET_EPOCH_EXIT(et);
- if (addrs == 0) {
- sbuf_bcat(sb, &ifr, sizeof(ifr));
- max_len += sizeof(ifr);
- if (sbuf_error(sb) == 0)
- valid_len = sbuf_len(sb);
- }
- }
- IFNET_RUNLOCK();
- /*
- * If we didn't allocate enough space (uncommon), try again. If
- * we have already allocated as much space as we are allowed,
- * return what we've got.
- */
- if (valid_len != max_len && !full) {
- sbuf_delete(sb);
- goto again;
- }
- ifc->ifc_len = valid_len;
- sbuf_finish(sb);
- error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
- sbuf_delete(sb);
- return (error);
- }
- /*
- * Just like ifpromisc(), but for all-multicast-reception mode.
- */
- int
- if_allmulti(struct ifnet *ifp, int onswitch)
- {
- return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
- }
- struct ifmultiaddr *
- if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
- {
- struct ifmultiaddr *ifma;
- IF_ADDR_LOCK_ASSERT(ifp);
- CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
- if (sa->sa_family == AF_LINK) {
- if (sa_dl_equal(ifma->ifma_addr, sa))
- break;
- } else {
- if (sa_equal(ifma->ifma_addr, sa))
- break;
- }
- }
- return ifma;
- }
- /*
- * Allocate a new ifmultiaddr and initialize based on passed arguments. We
- * make copies of passed sockaddrs. The ifmultiaddr will not be added to
- * the ifnet multicast address list here, so the caller must do that and
- * other setup work (such as notifying the device driver). The reference
- * count is initialized to 1.
- */
- static struct ifmultiaddr *
- if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
- int mflags)
- {
- struct ifmultiaddr *ifma;
- struct sockaddr *dupsa;
- ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
- M_ZERO);
- if (ifma == NULL)
- return (NULL);
- dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
- if (dupsa == NULL) {
- free(ifma, M_IFMADDR);
- return (NULL);
- }
- bcopy(sa, dupsa, sa->sa_len);
- ifma->ifma_addr = dupsa;
- ifma->ifma_ifp = ifp;
- ifma->ifma_refcount = 1;
- ifma->ifma_protospec = NULL;
- if (llsa == NULL) {
- ifma->ifma_lladdr = NULL;
- return (ifma);
- }
- dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
- if (dupsa == NULL) {
- free(ifma->ifma_addr, M_IFMADDR);
- free(ifma, M_IFMADDR);
- return (NULL);
- }
- bcopy(llsa, dupsa, llsa->sa_len);
- ifma->ifma_lladdr = dupsa;
- return (ifma);
- }
- /*
- * if_freemulti: free ifmultiaddr structure and possibly attached related
- * addresses. The caller is responsible for implementing reference
- * counting, notifying the driver, handling routing messages, and releasing
- * any dependent link layer state.
- */
- #ifdef MCAST_VERBOSE
- extern void kdb_backtrace(void);
- #endif
- static void
- if_freemulti_internal(struct ifmultiaddr *ifma)
- {
- KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
- ifma->ifma_refcount));
- if (ifma->ifma_lladdr != NULL)
- free(ifma->ifma_lladdr, M_IFMADDR);
- #ifdef MCAST_VERBOSE
- kdb_backtrace();
- printf("%s freeing ifma: %p\n", __func__, ifma);
- #endif
- free(ifma->ifma_addr, M_IFMADDR);
- free(ifma, M_IFMADDR);
- }
- static void
- if_destroymulti(epoch_context_t ctx)
- {
- struct ifmultiaddr *ifma;
- ifma = __containerof(ctx, struct ifmultiaddr, ifma_epoch_ctx);
- if_freemulti_internal(ifma);
- }
- void
- if_freemulti(struct ifmultiaddr *ifma)
- {
- KASSERT(ifma->ifma_refcount == 0, ("if_freemulti_epoch: refcount %d",
- ifma->ifma_refcount));
- NET_EPOCH_CALL(if_destroymulti, &ifma->ifma_epoch_ctx);
- }
- /*
- * Register an additional multicast address with a network interface.
- *
- * - If the address is already present, bump the reference count on the
- * address and return.
- * - If the address is not link-layer, look up a link layer address.
- * - Allocate address structures for one or both addresses, and attach to the
- * multicast address list on the interface. If automatically adding a link
- * layer address, the protocol address will own a reference to the link
- * layer address, to be freed when it is freed.
- * - Notify the network device driver of an addition to the multicast address
- * list.
- *
- * 'sa' points to caller-owned memory with the desired multicast address.
- *
- * 'retifma' will be used to return a pointer to the resulting multicast
- * address reference, if desired.
- */
- int
- if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
- struct ifmultiaddr **retifma)
- {
- struct ifmultiaddr *ifma, *ll_ifma;
- struct sockaddr *llsa;
- struct sockaddr_dl sdl;
- int error;
- #ifdef INET
- IN_MULTI_LIST_UNLOCK_ASSERT();
- #endif
- #ifdef INET6
- IN6_MULTI_LIST_UNLOCK_ASSERT();
- #endif
- /*
- * If the address is already present, return a new reference to it;
- * otherwise, allocate storage and set up a new address.
- */
- IF_ADDR_WLOCK(ifp);
- ifma = if_findmulti(ifp, sa);
- if (ifma != NULL) {
- ifma->ifma_refcount++;
- if (retifma != NULL)
- *retifma = ifma;
- IF_ADDR_WUNLOCK(ifp);
- return (0);
- }
- /*
- * The address isn't already present; resolve the protocol address
- * into a link layer address, and then look that up, bump its
- * refcount or allocate an ifma for that also.
- * Most link layer resolving functions returns address data which
- * fits inside default sockaddr_dl structure. However callback
- * can allocate another sockaddr structure, in that case we need to
- * free it later.
- */
- llsa = NULL;
- ll_ifma = NULL;
- if (ifp->if_resolvemulti != NULL) {
- /* Provide called function with buffer size information */
- sdl.sdl_len = sizeof(sdl);
- llsa = (struct sockaddr *)&sdl;
- error = ifp->if_resolvemulti(ifp, &llsa, sa);
- if (error)
- goto unlock_out;
- }
- /*
- * Allocate the new address. Don't hook it up yet, as we may also
- * need to allocate a link layer multicast address.
- */
- ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
- if (ifma == NULL) {
- error = ENOMEM;
- goto free_llsa_out;
- }
- /*
- * If a link layer address is found, we'll need to see if it's
- * already present in the address list, or allocate is as well.
- * When this block finishes, the link layer address will be on the
- * list.
- */
- if (llsa != NULL) {
- ll_ifma = if_findmulti(ifp, llsa);
- if (ll_ifma == NULL) {
- ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
- if (ll_ifma == NULL) {
- --ifma->ifma_refcount;
- if_freemulti(ifma);
- error = ENOMEM;
- goto free_llsa_out;
- }
- ll_ifma->ifma_flags |= IFMA_F_ENQUEUED;
- CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
- ifma_link);
- } else
- ll_ifma->ifma_refcount++;
- ifma->ifma_llifma = ll_ifma;
- }
- /*
- * We now have a new multicast address, ifma, and possibly a new or
- * referenced link layer address. Add the primary address to the
- * ifnet address list.
- */
- ifma->ifma_flags |= IFMA_F_ENQUEUED;
- CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
- if (retifma != NULL)
- *retifma = ifma;
- /*
- * Must generate the message while holding the lock so that 'ifma'
- * pointer is still valid.
- */
- rt_newmaddrmsg(RTM_NEWMADDR, ifma);
- IF_ADDR_WUNLOCK(ifp);
- /*
- * We are certain we have added something, so call down to the
- * interface to let them know about it.
- */
- if (ifp->if_ioctl != NULL) {
- if (THREAD_CAN_SLEEP())
- (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
- else
- taskqueue_enqueue(taskqueue_swi, &ifp->if_addmultitask);
- }
- if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
- link_free_sdl(llsa);
- return (0);
- free_llsa_out:
- if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
- link_free_sdl(llsa);
- unlock_out:
- IF_ADDR_WUNLOCK(ifp);
- return (error);
- }
- static void
- if_siocaddmulti(void *arg, int pending)
- {
- struct ifnet *ifp;
- ifp = arg;
- #ifdef DIAGNOSTIC
- if (pending > 1)
- if_printf(ifp, "%d SIOCADDMULTI coalesced\n", pending);
- #endif
- CURVNET_SET(ifp->if_vnet);
- (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
- CURVNET_RESTORE();
- }
- /*
- * Delete a multicast group membership by network-layer group address.
- *
- * Returns ENOENT if the entry could not be found. If ifp no longer
- * exists, results are undefined. This entry point should only be used
- * from subsystems which do appropriate locking to hold ifp for the
- * duration of the call.
- * Network-layer protocol domains must use if_delmulti_ifma().
- */
- int
- if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
- {
- struct ifmultiaddr *ifma;
- int lastref;
- KASSERT(ifp, ("%s: NULL ifp", __func__));
- IF_ADDR_WLOCK(ifp);
- lastref = 0;
- ifma = if_findmulti(ifp, sa);
- if (ifma != NULL)
- lastref = if_delmulti_locked(ifp, ifma, 0);
- IF_ADDR_WUNLOCK(ifp);
- if (ifma == NULL)
- return (ENOENT);
- if (lastref && ifp->if_ioctl != NULL) {
- (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
- }
- return (0);
- }
- /*
- * Delete all multicast group membership for an interface.
- * Should be used to quickly flush all multicast filters.
- */
- void
- if_delallmulti(struct ifnet *ifp)
- {
- struct ifmultiaddr *ifma;
- struct ifmultiaddr *next;
- IF_ADDR_WLOCK(ifp);
- CK_STAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
- if_delmulti_locked(ifp, ifma, 0);
- IF_ADDR_WUNLOCK(ifp);
- }
- void
- if_delmulti_ifma(struct ifmultiaddr *ifma)
- {
- if_delmulti_ifma_flags(ifma, 0);
- }
- /*
- * Delete a multicast group membership by group membership pointer.
- * Network-layer protocol domains must use this routine.
- *
- * It is safe to call this routine if the ifp disappeared.
- */
- void
- if_delmulti_ifma_flags(struct ifmultiaddr *ifma, int flags)
- {
- struct ifnet *ifp;
- int lastref;
- MCDPRINTF("%s freeing ifma: %p\n", __func__, ifma);
- #ifdef INET
- IN_MULTI_LIST_UNLOCK_ASSERT();
- #endif
- ifp = ifma->ifma_ifp;
- #ifdef DIAGNOSTIC
- if (ifp == NULL) {
- printf("%s: ifma_ifp seems to be detached\n", __func__);
- } else {
- struct epoch_tracker et;
- struct ifnet *oifp;
- NET_EPOCH_ENTER(et);
- CK_STAILQ_FOREACH(oifp, &V_ifnet, if_link)
- if (ifp == oifp)
- break;
- NET_EPOCH_EXIT(et);
- if (ifp != oifp)
- ifp = NULL;
- }
- #endif
- /*
- * If and only if the ifnet instance exists: Acquire the address lock.
- */
- if (ifp != NULL)
- IF_ADDR_WLOCK(ifp);
- lastref = if_delmulti_locked(ifp, ifma, flags);
- if (ifp != NULL) {
- /*
- * If and only if the ifnet instance exists:
- * Release the address lock.
- * If the group was left: update the hardware hash filter.
- */
- IF_ADDR_WUNLOCK(ifp);
- if (lastref && ifp->if_ioctl != NULL) {
- (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
- }
- }
- }
- /*
- * Perform deletion of network-layer and/or link-layer multicast address.
- *
- * Return 0 if the reference count was decremented.
- * Return 1 if the final reference was released, indicating that the
- * hardware hash filter should be reprogrammed.
- */
- static int
- if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
- {
- struct ifmultiaddr *ll_ifma;
- if (ifp != NULL && ifma->ifma_ifp != NULL) {
- KASSERT(ifma->ifma_ifp == ifp,
- ("%s: inconsistent ifp %p", __func__, ifp));
- IF_ADDR_WLOCK_ASSERT(ifp);
- }
- ifp = ifma->ifma_ifp;
- MCDPRINTF("%s freeing %p from %s \n", __func__, ifma, ifp ? ifp->if_xname : "");
- /*
- * If the ifnet is detaching, null out references to ifnet,
- * so that upper protocol layers will notice, and not attempt
- * to obtain locks for an ifnet which no longer exists. The
- * routing socket announcement must happen before the ifnet
- * instance is detached from the system.
- */
- if (detaching) {
- #ifdef DIAGNOSTIC
- printf("%s: detaching ifnet instance %p\n", __func__, ifp);
- #endif
- /*
- * ifp may already be nulled out if we are being reentered
- * to delete the ll_ifma.
- */
- if (ifp != NULL) {
- rt_newmaddrmsg(RTM_DELMADDR, ifma);
- ifma->ifma_ifp = NULL;
- }
- }
- if (--ifma->ifma_refcount > 0)
- return 0;
- if (ifp != NULL && detaching == 0 && (ifma->ifma_flags & IFMA_F_ENQUEUED)) {
- CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
- ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
- }
- /*
- * If this ifma is a network-layer ifma, a link-layer ifma may
- * have been associated with it. Release it first if so.
- */
- ll_ifma = ifma->ifma_llifma;
- if (ll_ifma != NULL) {
- KASSERT(ifma->ifma_lladdr != NULL,
- ("%s: llifma w/o lladdr", __func__));
- if (detaching)
- ll_ifma->ifma_ifp = NULL; /* XXX */
- if (--ll_ifma->ifma_refcount == 0) {
- if (ifp != NULL) {
- if (ll_ifma->ifma_flags & IFMA_F_ENQUEUED) {
- CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifmultiaddr,
- ifma_link);
- ll_ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
- }
- }
- if_freemulti(ll_ifma);
- }
- }
- #ifdef INVARIANTS
- if (ifp) {
- struct ifmultiaddr *ifmatmp;
- CK_STAILQ_FOREACH(ifmatmp, &ifp->if_multiaddrs, ifma_link)
- MPASS(ifma != ifmatmp);
- }
- #endif
- if_freemulti(ifma);
- /*
- * The last reference to this instance of struct ifmultiaddr
- * was released; the hardware should be notified of this change.
- */
- return 1;
- }
- /*
- * Set the link layer address on an interface.
- *
- * At this time we only support certain types of interfaces,
- * and we don't allow the length of the address to change.
- *
- * Set noinline to be dtrace-friendly
- */
- __noinline int
- if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
- {
- struct sockaddr_dl *sdl;
- struct ifaddr *ifa;
- struct ifreq ifr;
- ifa = ifp->if_addr;
- if (ifa == NULL)
- return (EINVAL);
- sdl = (struct sockaddr_dl *)ifa->ifa_addr;
- if (sdl == NULL)
- return (EINVAL);
- if (len != sdl->sdl_alen) /* don't allow length to change */
- return (EINVAL);
- switch (ifp->if_type) {
- case IFT_ETHER:
- case IFT_XETHER:
- case IFT_L2VLAN:
- case IFT_BRIDGE:
- case IFT_IEEE8023ADLAG:
- bcopy(lladdr, LLADDR(sdl), len);
- break;
- default:
- return (ENODEV);
- }
- /*
- * If the interface is already up, we need
- * to re-init it in order to reprogram its
- * address filter.
- */
- if ((ifp->if_flags & IFF_UP) != 0) {
- if (ifp->if_ioctl) {
- ifp->if_flags &= ~IFF_UP;
- ifr.ifr_flags = ifp->if_flags & 0xffff;
- ifr.ifr_flagshigh = ifp->if_flags >> 16;
- (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
- ifp->if_flags |= IFF_UP;
- ifr.ifr_flags = ifp->if_flags & 0xffff;
- ifr.ifr_flagshigh = ifp->if_flags >> 16;
- (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
- }
- }
- EVENTHANDLER_INVOKE(iflladdr_event, ifp);
- return (0);
- }
- /*
- * Compat function for handling basic encapsulation requests.
- * Not converted stacks (FDDI, IB, ..) supports traditional
- * output model: ARP (and other similar L2 protocols) are handled
- * inside output routine, arpresolve/nd6_resolve() returns MAC
- * address instead of full prepend.
- *
- * This function creates calculated header==MAC for IPv4/IPv6 and
- * returns EAFNOSUPPORT (which is then handled in ARP code) for other
- * address families.
- */
- static int
- if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
- {
- if (req->rtype != IFENCAP_LL)
- return (EOPNOTSUPP);
- if (req->bufsize < req->lladdr_len)
- return (ENOMEM);
- switch (req->family) {
- case AF_INET:
- case AF_INET6:
- break;
- default:
- return (EAFNOSUPPORT);
- }
- /* Copy lladdr to storage as is */
- memmove(req->buf, req->lladdr, req->lladdr_len);
- req->bufsize = req->lladdr_len;
- req->lladdr_off = 0;
- return (0);
- }
- /*
- * Tunnel interfaces can nest, also they may cause infinite recursion
- * calls when misconfigured. We'll prevent this by detecting loops.
- * High nesting level may cause stack exhaustion. We'll prevent this
- * by introducing upper limit.
- *
- * Return 0, if tunnel nesting count is equal or less than limit.
- */
- int
- if_tunnel_check_nesting(struct ifnet *ifp, struct mbuf *m, uint32_t cookie,
- int limit)
- {
- struct m_tag *mtag;
- int count;
- count = 1;
- mtag = NULL;
- while ((mtag = m_tag_locate(m, cookie, 0, mtag)) != NULL) {
- if (*(struct ifnet **)(mtag + 1) == ifp) {
- log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp));
- return (EIO);
- }
- count++;
- }
- if (count > limit) {
- log(LOG_NOTICE,
- "%s: if_output recursively called too many times(%d)\n",
- if_name(ifp), count);
- return (EIO);
- }
- mtag = m_tag_alloc(cookie, 0, sizeof(struct ifnet *), M_NOWAIT);
- if (mtag == NULL)
- return (ENOMEM);
- *(struct ifnet **)(mtag + 1) = ifp;
- m_tag_prepend(m, mtag);
- return (0);
- }
- /*
- * Get the link layer address that was read from the hardware at attach.
- *
- * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type
- * their component interfaces as IFT_IEEE8023ADLAG.
- */
- int
- if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr)
- {
- if (ifp->if_hw_addr == NULL)
- return (ENODEV);
- switch (ifp->if_type) {
- case IFT_ETHER:
- case IFT_IEEE8023ADLAG:
- bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen);
- return (0);
- default:
- return (ENODEV);
- }
- }
- /*
- * The name argument must be a pointer to storage which will last as
- * long as the interface does. For physical devices, the result of
- * device_get_name(dev) is a good choice and for pseudo-devices a
- * static string works well.
- */
- void
- if_initname(struct ifnet *ifp, const char *name, int unit)
- {
- ifp->if_dname = name;
- ifp->if_dunit = unit;
- if (unit != IF_DUNIT_NONE)
- snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
- else
- strlcpy(ifp->if_xname, name, IFNAMSIZ);
- }
- static int
- if_vlog(struct ifnet *ifp, int pri, const char *fmt, va_list ap)
- {
- char if_fmt[256];
- snprintf(if_fmt, sizeof(if_fmt), "%s: %s", ifp->if_xname, fmt);
- vlog(pri, if_fmt, ap);
- return (0);
- }
- int
- if_printf(struct ifnet *ifp, const char *fmt, ...)
- {
- va_list ap;
- va_start(ap, fmt);
- if_vlog(ifp, LOG_INFO, fmt, ap);
- va_end(ap);
- return (0);
- }
- int
- if_log(struct ifnet *ifp, int pri, const char *fmt, ...)
- {
- va_list ap;
- va_start(ap, fmt);
- if_vlog(ifp, pri, fmt, ap);
- va_end(ap);
- return (0);
- }
- void
- if_start(struct ifnet *ifp)
- {
- (*(ifp)->if_start)(ifp);
- }
- /*
- * Backwards compatibility interface for drivers
- * that have not implemented it
- */
- static int
- if_transmit_default(struct ifnet *ifp, struct mbuf *m)
- {
- int error;
- IFQ_HANDOFF(ifp, m, error);
- return (error);
- }
- static void
- if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
- {
- m_freem(m);
- }
- int
- if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
- {
- int active = 0;
- IF_LOCK(ifq);
- if (_IF_QFULL(ifq)) {
- IF_UNLOCK(ifq);
- if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
- m_freem(m);
- return (0);
- }
- if (ifp != NULL) {
- if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
- if (m->m_flags & (M_BCAST|M_MCAST))
- if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
- active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
- }
- _IF_ENQUEUE(ifq, m);
- IF_UNLOCK(ifq);
- if (ifp != NULL && !active)
- (*(ifp)->if_start)(ifp);
- return (1);
- }
- void
- if_register_com_alloc(u_char type,
- if_com_alloc_t *a, if_com_free_t *f)
- {
- KASSERT(if_com_alloc[type] == NULL,
- ("if_register_com_alloc: %d already registered", type));
- KASSERT(if_com_free[type] == NULL,
- ("if_register_com_alloc: %d free already registered", type));
- if_com_alloc[type] = a;
- if_com_free[type] = f;
- }
- void
- if_deregister_com_alloc(u_char type)
- {
- KASSERT(if_com_alloc[type] != NULL,
- ("if_deregister_com_alloc: %d not registered", type));
- KASSERT(if_com_free[type] != NULL,
- ("if_deregister_com_alloc: %d free not registered", type));
- /*
- * Ensure all pending EPOCH(9) callbacks have been executed. This
- * fixes issues about late invocation of if_destroy(), which leads
- * to memory leak from if_com_alloc[type] allocated if_l2com.
- */
- NET_EPOCH_DRAIN_CALLBACKS();
- if_com_alloc[type] = NULL;
- if_com_free[type] = NULL;
- }
- /* API for driver access to network stack owned ifnet.*/
- uint64_t
- if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
- {
- uint64_t oldbrate;
- oldbrate = ifp->if_baudrate;
- ifp->if_baudrate = baudrate;
- return (oldbrate);
- }
- uint64_t
- if_getbaudrate(const if_t ifp)
- {
- return (ifp->if_baudrate);
- }
- int
- if_setcapabilities(if_t ifp, int capabilities)
- {
- ifp->if_capabilities = capabilities;
- return (0);
- }
- int
- if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
- {
- ifp->if_capabilities &= ~clearbit;
- ifp->if_capabilities |= setbit;
- return (0);
- }
- int
- if_getcapabilities(const if_t ifp)
- {
- return (ifp->if_capabilities);
- }
- int
- if_setcapenable(if_t ifp, int capabilities)
- {
- ifp->if_capenable = capabilities;
- return (0);
- }
- int
- if_setcapenablebit(if_t ifp, int setcap, int clearcap)
- {
- ifp->if_capenable &= ~clearcap;
- ifp->if_capenable |= setcap;
- return (0);
- }
- int
- if_setcapabilities2(if_t ifp, int capabilities)
- {
- ifp->if_capabilities2 = capabilities;
- return (0);
- }
- int
- if_setcapabilities2bit(if_t ifp, int setbit, int clearbit)
- {
- ifp->if_capabilities2 &= ~clearbit;
- ifp->if_capabilities2 |= setbit;
- return (0);
- }
- int
- if_getcapabilities2(const if_t ifp)
- {
- return (ifp->if_capabilities2);
- }
- int
- if_setcapenable2(if_t ifp, int capabilities2)
- {
- ifp->if_capenable2 = capabilities2;
- return (0);
- }
- int
- if_setcapenable2bit(if_t ifp, int setcap, int clearcap)
- {
- ifp->if_capenable2 &= ~clearcap;
- ifp->if_capenable2 |= setcap;
- return (0);
- }
- const char *
- if_getdname(const if_t ifp)
- {
- return (ifp->if_dname);
- }
- void
- if_setdname(if_t ifp, const char *dname)
- {
- ifp->if_dname = dname;
- }
- const char *
- if_name(if_t ifp)
- {
- return (ifp->if_xname);
- }
- int
- if_setname(if_t ifp, const char *name)
- {
- if (strlen(name) > sizeof(ifp->if_xname) - 1)
- return (ENAMETOOLONG);
- strcpy(ifp->if_xname, name);
- return (0);
- }
- int
- if_togglecapenable(if_t ifp, int togglecap)
- {
- ifp->if_capenable ^= togglecap;
- return (0);
- }
- int
- if_getcapenable(const if_t ifp)
- {
- return (ifp->if_capenable);
- }
- int
- if_togglecapenable2(if_t ifp, int togglecap)
- {
- ifp->if_capenable2 ^= togglecap;
- return (0);
- }
- int
- if_getcapenable2(const if_t ifp)
- {
- return (ifp->if_capenable2);
- }
- int
- if_getdunit(const if_t ifp)
- {
- return (ifp->if_dunit);
- }
- int
- if_getindex(const if_t ifp)
- {
- return (ifp->if_index);
- }
- int
- if_getidxgen(const if_t ifp)
- {
- return (ifp->if_idxgen);
- }
- const char *
- if_getdescr(if_t ifp)
- {
- return (ifp->if_description);
- }
- void
- if_setdescr(if_t ifp, char *descrbuf)
- {
- sx_xlock(&ifdescr_sx);
- char *odescrbuf = ifp->if_description;
- ifp->if_description = descrbuf;
- sx_xunlock(&ifdescr_sx);
- if_freedescr(odescrbuf);
- }
- char *
- if_allocdescr(size_t sz, int malloc_flag)
- {
- malloc_flag &= (M_WAITOK | M_NOWAIT);
- return (malloc(sz, M_IFDESCR, M_ZERO | malloc_flag));
- }
- void
- if_freedescr(char *descrbuf)
- {
- free(descrbuf, M_IFDESCR);
- }
- int
- if_getalloctype(const if_t ifp)
- {
- return (ifp->if_alloctype);
- }
- void
- if_setlastchange(if_t ifp)
- {
- getmicrotime(&ifp->if_lastchange);
- }
- /*
- * This is largely undesirable because it ties ifnet to a device, but does
- * provide flexiblity for an embedded product vendor. Should be used with
- * the understanding that it violates the interface boundaries, and should be
- * a last resort only.
- */
- int
- if_setdev(if_t ifp, void *dev)
- {
- return (0);
- }
- int
- if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
- {
- ifp->if_drv_flags &= ~clear_flags;
- ifp->if_drv_flags |= set_flags;
- return (0);
- }
- int
- if_getdrvflags(const if_t ifp)
- {
- return (ifp->if_drv_flags);
- }
- int
- if_setdrvflags(if_t ifp, int flags)
- {
- ifp->if_drv_flags = flags;
- return (0);
- }
- int
- if_setflags(if_t ifp, int flags)
- {
- ifp->if_flags = flags;
- return (0);
- }
- int
- if_setflagbits(if_t ifp, int set, int clear)
- {
- ifp->if_flags &= ~clear;
- ifp->if_flags |= set;
- return (0);
- }
- int
- if_getflags(const if_t ifp)
- {
- return (ifp->if_flags);
- }
- int
- if_clearhwassist(if_t ifp)
- {
- ifp->if_hwassist = 0;
- return (0);
- }
- int
- if_sethwassistbits(if_t ifp, int toset, int toclear)
- {
- ifp->if_hwassist &= ~toclear;
- ifp->if_hwassist |= toset;
- return (0);
- }
- int
- if_sethwassist(if_t ifp, int hwassist_bit)
- {
- ifp->if_hwassist = hwassist_bit;
- return (0);
- }
- int
- if_gethwassist(const if_t ifp)
- {
- return (ifp->if_hwassist);
- }
- int
- if_togglehwassist(if_t ifp, int toggle_bits)
- {
- ifp->if_hwassist ^= toggle_bits;
- return (0);
- }
- int
- if_setmtu(if_t ifp, int mtu)
- {
- ifp->if_mtu = mtu;
- return (0);
- }
- void
- if_notifymtu(if_t ifp)
- {
- #ifdef INET6
- nd6_setmtu(ifp);
- #endif
- rt_updatemtu(ifp);
- }
- int
- if_getmtu(const if_t ifp)
- {
- return (ifp->if_mtu);
- }
- int
- if_getmtu_family(const if_t ifp, int family)
- {
- struct domain *dp;
- SLIST_FOREACH(dp, &domains, dom_next) {
- if (dp->dom_family == family && dp->dom_ifmtu != NULL)
- return (dp->dom_ifmtu(ifp));
- }
- return (ifp->if_mtu);
- }
- /*
- * Methods for drivers to access interface unicast and multicast
- * link level addresses. Driver shall not know 'struct ifaddr' neither
- * 'struct ifmultiaddr'.
- */
- u_int
- if_lladdr_count(if_t ifp)
- {
- struct epoch_tracker et;
- struct ifaddr *ifa;
- u_int count;
- count = 0;
- NET_EPOCH_ENTER(et);
- CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
- if (ifa->ifa_addr->sa_family == AF_LINK)
- count++;
- NET_EPOCH_EXIT(et);
- return (count);
- }
- int
- if_foreach(if_foreach_cb_t cb, void *cb_arg)
- {
- if_t ifp;
- int error;
- NET_EPOCH_ASSERT();
- MPASS(cb);
- error = 0;
- CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
- error = cb(ifp, cb_arg);
- if (error != 0)
- break;
- }
- return (error);
- }
- /*
- * Iterates over the list of interfaces, permitting callback function @cb to sleep.
- * Stops iteration if @cb returns non-zero error code.
- * Returns the last error code from @cb.
- * @match_cb: optional match callback limiting the iteration to only matched interfaces
- * @match_arg: argument to pass to @match_cb
- * @cb: iteration callback
- * @cb_arg: argument to pass to @cb
- */
- int
- if_foreach_sleep(if_foreach_match_t match_cb, void *match_arg, if_foreach_cb_t cb,
- void *cb_arg)
- {
- int match_count = 0, array_size = 16; /* 128 bytes for malloc */
- struct ifnet **match_array = NULL;
- int error = 0;
- MPASS(cb);
- while (true) {
- struct ifnet **new_array;
- int new_size = array_size;
- struct epoch_tracker et;
- struct ifnet *ifp;
- while (new_size < match_count)
- new_size *= 2;
- new_array = malloc(new_size * sizeof(void *), M_TEMP, M_WAITOK);
- if (match_array != NULL)
- memcpy(new_array, match_array, array_size * sizeof(void *));
- free(match_array, M_TEMP);
- match_array = new_array;
- array_size = new_size;
- match_count = 0;
- NET_EPOCH_ENTER(et);
- CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
- if (match_cb != NULL && !match_cb(ifp, match_arg))
- continue;
- if (match_count < array_size) {
- if (if_try_ref(ifp))
- match_array[match_count++] = ifp;
- } else
- match_count++;
- }
- NET_EPOCH_EXIT(et);
- if (match_count > array_size) {
- for (int i = 0; i < array_size; i++)
- if_rele(match_array[i]);
- continue;
- } else {
- for (int i = 0; i < match_count; i++) {
- if (error == 0)
- error = cb(match_array[i], cb_arg);
- if_rele(match_array[i]);
- }
- free(match_array, M_TEMP);
- break;
- }
- }
- return (error);
- }
- /*
- * Uses just 1 pointer of the 4 available in the public struct.
- */
- if_t
- if_iter_start(struct if_iter *iter)
- {
- if_t ifp;
- NET_EPOCH_ASSERT();
- bzero(iter, sizeof(*iter));
- ifp = CK_STAILQ_FIRST(&V_ifnet);
- if (ifp != NULL)
- iter->context[0] = CK_STAILQ_NEXT(ifp, if_link);
- else
- iter->context[0] = NULL;
- return (ifp);
- }
- if_t
- if_iter_next(struct if_iter *iter)
- {
- if_t cur_ifp = iter->context[0];
- if (cur_ifp != NULL)
- iter->context[0] = CK_STAILQ_NEXT(cur_ifp, if_link);
- return (cur_ifp);
- }
- void
- if_iter_finish(struct if_iter *iter)
- {
- /* Nothing to do here for now. */
- }
- u_int
- if_foreach_lladdr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
- {
- struct epoch_tracker et;
- struct ifaddr *ifa;
- u_int count;
- MPASS(cb);
- count = 0;
- NET_EPOCH_ENTER(et);
- CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
- if (ifa->ifa_addr->sa_family != AF_LINK)
- continue;
- count += (*cb)(cb_arg, (struct sockaddr_dl *)ifa->ifa_addr,
- count);
- }
- NET_EPOCH_EXIT(et);
- return (count);
- }
- u_int
- if_llmaddr_count(if_t ifp)
- {
- struct epoch_tracker et;
- struct ifmultiaddr *ifma;
- int count;
- count = 0;
- NET_EPOCH_ENTER(et);
- CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
- if (ifma->ifma_addr->sa_family == AF_LINK)
- count++;
- NET_EPOCH_EXIT(et);
- return (count);
- }
- bool
- if_maddr_empty(if_t ifp)
- {
- return (CK_STAILQ_EMPTY(&ifp->if_multiaddrs));
- }
- u_int
- if_foreach_llmaddr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
- {
- struct epoch_tracker et;
- struct ifmultiaddr *ifma;
- u_int count;
- MPASS(cb);
- count = 0;
- NET_EPOCH_ENTER(et);
- CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
- if (ifma->ifma_addr->sa_family != AF_LINK)
- continue;
- count += (*cb)(cb_arg, (struct sockaddr_dl *)ifma->ifma_addr,
- count);
- }
- NET_EPOCH_EXIT(et);
- return (count);
- }
- u_int
- if_foreach_addr_type(if_t ifp, int type, if_addr_cb_t cb, void *cb_arg)
- {
- struct epoch_tracker et;
- struct ifaddr *ifa;
- u_int count;
- MPASS(cb);
- count = 0;
- NET_EPOCH_ENTER(et);
- CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
- if (ifa->ifa_addr->sa_family != type)
- continue;
- count += (*cb)(cb_arg, ifa, count);
- }
- NET_EPOCH_EXIT(et);
- return (count);
- }
- struct ifaddr *
- ifa_iter_start(if_t ifp, struct ifa_iter *iter)
- {
- struct ifaddr *ifa;
- NET_EPOCH_ASSERT();
- bzero(iter, sizeof(*iter));
- ifa = CK_STAILQ_FIRST(&ifp->if_addrhead);
- if (ifa != NULL)
- iter->context[0] = CK_STAILQ_NEXT(ifa, ifa_link);
- else
- iter->context[0] = NULL;
- return (ifa);
- }
- struct ifaddr *
- ifa_iter_next(struct ifa_iter *iter)
- {
- struct ifaddr *ifa = iter->context[0];
- if (ifa != NULL)
- iter->context[0] = CK_STAILQ_NEXT(ifa, ifa_link);
- return (ifa);
- }
- void
- ifa_iter_finish(struct ifa_iter *iter)
- {
- /* Nothing to do here for now. */
- }
- int
- if_setsoftc(if_t ifp, void *softc)
- {
- ifp->if_softc = softc;
- return (0);
- }
- void *
- if_getsoftc(const if_t ifp)
- {
- return (ifp->if_softc);
- }
- void
- if_setrcvif(struct mbuf *m, if_t ifp)
- {
- MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
- m->m_pkthdr.rcvif = (struct ifnet *)ifp;
- }
- void
- if_setvtag(struct mbuf *m, uint16_t tag)
- {
- m->m_pkthdr.ether_vtag = tag;
- }
- uint16_t
- if_getvtag(struct mbuf *m)
- {
- return (m->m_pkthdr.ether_vtag);
- }
- int
- if_sendq_empty(if_t ifp)
- {
- return (IFQ_DRV_IS_EMPTY(&ifp->if_snd));
- }
- struct ifaddr *
- if_getifaddr(const if_t ifp)
- {
- return (ifp->if_addr);
- }
- int
- if_getamcount(const if_t ifp)
- {
- return (ifp->if_amcount);
- }
- int
- if_setsendqready(if_t ifp)
- {
- IFQ_SET_READY(&ifp->if_snd);
- return (0);
- }
- int
- if_setsendqlen(if_t ifp, int tx_desc_count)
- {
- IFQ_SET_MAXLEN(&ifp->if_snd, tx_desc_count);
- ifp->if_snd.ifq_drv_maxlen = tx_desc_count;
- return (0);
- }
- void
- if_setnetmapadapter(if_t ifp, struct netmap_adapter *na)
- {
- ifp->if_netmap = na;
- }
- struct netmap_adapter *
- if_getnetmapadapter(if_t ifp)
- {
- return (ifp->if_netmap);
- }
- int
- if_vlantrunkinuse(if_t ifp)
- {
- return (ifp->if_vlantrunk != NULL);
- }
- void
- if_init(if_t ifp, void *ctx)
- {
- (*ifp->if_init)(ctx);
- }
- void
- if_input(if_t ifp, struct mbuf* sendmp)
- {
- (*ifp->if_input)(ifp, sendmp);
- }
- int
- if_transmit(if_t ifp, struct mbuf *m)
- {
- return ((*ifp->if_transmit)(ifp, m));
- }
- int
- if_resolvemulti(if_t ifp, struct sockaddr **srcs, struct sockaddr *dst)
- {
- if (ifp->if_resolvemulti == NULL)
- return (EOPNOTSUPP);
- return (ifp->if_resolvemulti(ifp, srcs, dst));
- }
- int
- if_ioctl(if_t ifp, u_long cmd, void *data)
- {
- if (ifp->if_ioctl == NULL)
- return (EOPNOTSUPP);
- return (ifp->if_ioctl(ifp, cmd, data));
- }
- struct mbuf *
- if_dequeue(if_t ifp)
- {
- struct mbuf *m;
- IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
- return (m);
- }
- int
- if_sendq_prepend(if_t ifp, struct mbuf *m)
- {
- IFQ_DRV_PREPEND(&ifp->if_snd, m);
- return (0);
- }
- int
- if_setifheaderlen(if_t ifp, int len)
- {
- ifp->if_hdrlen = len;
- return (0);
- }
- caddr_t
- if_getlladdr(const if_t ifp)
- {
- return (IF_LLADDR(ifp));
- }
- void *
- if_gethandle(u_char type)
- {
- return (if_alloc(type));
- }
- void
- if_vlancap(if_t ifp)
- {
- VLAN_CAPABILITIES(ifp);
- }
- int
- if_sethwtsomax(if_t ifp, u_int if_hw_tsomax)
- {
- ifp->if_hw_tsomax = if_hw_tsomax;
- return (0);
- }
- int
- if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount)
- {
- ifp->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount;
- return (0);
- }
- int
- if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize)
- {
- ifp->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize;
- return (0);
- }
- u_int
- if_gethwtsomax(const if_t ifp)
- {
- return (ifp->if_hw_tsomax);
- }
- u_int
- if_gethwtsomaxsegcount(const if_t ifp)
- {
- return (ifp->if_hw_tsomaxsegcount);
- }
- u_int
- if_gethwtsomaxsegsize(const if_t ifp)
- {
- return (ifp->if_hw_tsomaxsegsize);
- }
- void
- if_setinitfn(if_t ifp, if_init_fn_t init_fn)
- {
- ifp->if_init = init_fn;
- }
- void
- if_setinputfn(if_t ifp, if_input_fn_t input_fn)
- {
- ifp->if_input = input_fn;
- }
- if_input_fn_t
- if_getinputfn(if_t ifp)
- {
- return (ifp->if_input);
- }
- void
- if_setioctlfn(if_t ifp, if_ioctl_fn_t ioctl_fn)
- {
- ifp->if_ioctl = ioctl_fn;
- }
- void
- if_setoutputfn(if_t ifp, if_output_fn_t output_fn)
- {
- ifp->if_output = output_fn;
- }
- void
- if_setstartfn(if_t ifp, if_start_fn_t start_fn)
- {
- ifp->if_start = start_fn;
- }
- if_start_fn_t
- if_getstartfn(if_t ifp)
- {
- return (ifp->if_start);
- }
- void
- if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
- {
- ifp->if_transmit = start_fn;
- }
- if_transmit_fn_t
- if_gettransmitfn(if_t ifp)
- {
- return (ifp->if_transmit);
- }
- void
- if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
- {
- ifp->if_qflush = flush_fn;
- }
- void
- if_setsndtagallocfn(if_t ifp, if_snd_tag_alloc_t alloc_fn)
- {
- ifp->if_snd_tag_alloc = alloc_fn;
- }
- int
- if_snd_tag_alloc(if_t ifp, union if_snd_tag_alloc_params *params,
- struct m_snd_tag **mstp)
- {
- if (ifp->if_snd_tag_alloc == NULL)
- return (EOPNOTSUPP);
- return (ifp->if_snd_tag_alloc(ifp, params, mstp));
- }
- void
- if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
- {
- ifp->if_get_counter = fn;
- }
- void
- if_setreassignfn(if_t ifp, if_reassign_fn_t fn)
- {
- ifp->if_reassign = fn;
- }
- void
- if_setratelimitqueryfn(if_t ifp, if_ratelimit_query_t fn)
- {
- ifp->if_ratelimit_query = fn;
- }
- void
- if_setdebugnet_methods(if_t ifp, struct debugnet_methods *m)
- {
- ifp->if_debugnet_methods = m;
- }
- struct label *
- if_getmaclabel(if_t ifp)
- {
- return (ifp->if_label);
- }
- void
- if_setmaclabel(if_t ifp, struct label *label)
- {
- ifp->if_label = label;
- }
- int
- if_gettype(if_t ifp)
- {
- return (ifp->if_type);
- }
- void *
- if_getllsoftc(if_t ifp)
- {
- return (ifp->if_llsoftc);
- }
- void
- if_setllsoftc(if_t ifp, void *llsoftc)
- {
- ifp->if_llsoftc = llsoftc;
- };
- int
- if_getlinkstate(if_t ifp)
- {
- return (ifp->if_link_state);
- }
- const uint8_t *
- if_getbroadcastaddr(if_t ifp)
- {
- return (ifp->if_broadcastaddr);
- }
- void
- if_setbroadcastaddr(if_t ifp, const uint8_t *addr)
- {
- ifp->if_broadcastaddr = addr;
- }
- int
- if_getnumadomain(if_t ifp)
- {
- return (ifp->if_numa_domain);
- }
- uint64_t
- if_getcounter(if_t ifp, ift_counter counter)
- {
- return (ifp->if_get_counter(ifp, counter));
- }
- bool
- if_altq_is_enabled(if_t ifp)
- {
- return (ALTQ_IS_ENABLED(&ifp->if_snd));
- }
- struct vnet *
- if_getvnet(if_t ifp)
- {
- return (ifp->if_vnet);
- }
- void *
- if_getafdata(if_t ifp, int af)
- {
- return (ifp->if_afdata[af]);
- }
- u_int
- if_getfib(if_t ifp)
- {
- return (ifp->if_fib);
- }
- uint8_t
- if_getaddrlen(if_t ifp)
- {
- return (ifp->if_addrlen);
- }
- struct bpf_if *
- if_getbpf(if_t ifp)
- {
- return (ifp->if_bpf);
- }
- struct ifvlantrunk *
- if_getvlantrunk(if_t ifp)
- {
- return (ifp->if_vlantrunk);
- }
- uint8_t
- if_getpcp(if_t ifp)
- {
- return (ifp->if_pcp);
- }
- void *
- if_getl2com(if_t ifp)
- {
- return (ifp->if_l2com);
- }
- void
- if_setipsec_accel_methods(if_t ifp, const struct if_ipsec_accel_methods *m)
- {
- ifp->if_ipsec_accel_m = m;
- }
- #ifdef DDB
- static void
- if_show_ifnet(struct ifnet *ifp)
- {
- if (ifp == NULL)
- return;
- db_printf("%s:\n", ifp->if_xname);
- #define IF_DB_PRINTF(f, e) db_printf(" %s = " f "\n", #e, ifp->e);
- IF_DB_PRINTF("%s", if_dname);
- IF_DB_PRINTF("%d", if_dunit);
- IF_DB_PRINTF("%s", if_description);
- IF_DB_PRINTF("%u", if_index);
- IF_DB_PRINTF("%d", if_idxgen);
- IF_DB_PRINTF("%u", if_refcount);
- IF_DB_PRINTF("%p", if_softc);
- IF_DB_PRINTF("%p", if_l2com);
- IF_DB_PRINTF("%p", if_llsoftc);
- IF_DB_PRINTF("%d", if_amcount);
- IF_DB_PRINTF("%p", if_addr);
- IF_DB_PRINTF("%p", if_broadcastaddr);
- IF_DB_PRINTF("%p", if_afdata);
- IF_DB_PRINTF("%d", if_afdata_initialized);
- IF_DB_PRINTF("%u", if_fib);
- IF_DB_PRINTF("%p", if_vnet);
- IF_DB_PRINTF("%p", if_home_vnet);
- IF_DB_PRINTF("%p", if_vlantrunk);
- IF_DB_PRINTF("%p", if_bpf);
- IF_DB_PRINTF("%u", if_pcount);
- IF_DB_PRINTF("%p", if_bridge);
- IF_DB_PRINTF("%p", if_lagg);
- IF_DB_PRINTF("%p", if_pf_kif);
- IF_DB_PRINTF("%p", if_carp);
- IF_DB_PRINTF("%p", if_label);
- IF_DB_PRINTF("%p", if_netmap);
- IF_DB_PRINTF("0x%08x", if_flags);
- IF_DB_PRINTF("0x%08x", if_drv_flags);
- IF_DB_PRINTF("0x%08x", if_capabilities);
- IF_DB_PRINTF("0x%08x", if_capenable);
- IF_DB_PRINTF("%p", if_snd.ifq_head);
- IF_DB_PRINTF("%p", if_snd.ifq_tail);
- IF_DB_PRINTF("%d", if_snd.ifq_len);
- IF_DB_PRINTF("%d", if_snd.ifq_maxlen);
- IF_DB_PRINTF("%p", if_snd.ifq_drv_head);
- IF_DB_PRINTF("%p", if_snd.ifq_drv_tail);
- IF_DB_PRINTF("%d", if_snd.ifq_drv_len);
- IF_DB_PRINTF("%d", if_snd.ifq_drv_maxlen);
- IF_DB_PRINTF("%d", if_snd.altq_type);
- IF_DB_PRINTF("%x", if_snd.altq_flags);
- #undef IF_DB_PRINTF
- }
- DB_SHOW_COMMAND(ifnet, db_show_ifnet)
- {
- if (!have_addr) {
- db_printf("usage: show ifnet <struct ifnet *>\n");
- return;
- }
- if_show_ifnet((struct ifnet *)addr);
- }
- DB_SHOW_ALL_COMMAND(ifnets, db_show_all_ifnets)
- {
- struct ifnet *ifp;
- u_short idx;
- for (idx = 1; idx <= if_index; idx++) {
- ifp = ifindex_table[idx].ife_ifnet;
- if (ifp == NULL)
- continue;
- db_printf( "%20s ifp=%p\n", ifp->if_xname, ifp);
- if (db_pager_quit)
- break;
- }
- }
- #endif /* DDB */
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