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gems-kernel/source/THIRDPARTY/xnu/bsd/skywalk/nexus/flowswitch/fsw.c
Sam Sneed f5727805f2 add darwin/xnu functionality
2024-06-03 11:29:39 -05:00

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/*
* Copyright (c) 2015-2023 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (C) 2013-2014 Universita` di Pisa. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <pexpert/pexpert.h> /* for PE_parse_boot_argn */
#include <skywalk/os_skywalk_private.h>
#include <skywalk/nexus/flowswitch/nx_flowswitch.h>
#include <skywalk/nexus/flowswitch/fsw_var.h>
#include <skywalk/nexus/netif/nx_netif.h>
#include <skywalk/nexus/netif/nx_netif_compat.h>
#include <net/bpf.h>
#include <net/if.h>
#include <net/pktsched/pktsched_netem.h>
#include <sys/eventhandler.h>
#if (DEVELOPMENT || DEBUG)
SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, chain_enqueue,
CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_chain_enqueue, 0, "");
#endif /* !DEVELOPMENT && !DEBUG */
/*
* Configures the flowswitch to utilize user packet pool with
* dual sized buffers.
* A non-zero value enables the support.
*/
#if defined(XNU_TARGET_OS_IOS) || defined(XNU_TARGET_OS_OSX)
uint32_t fsw_use_dual_sized_pool = 1;
#else
uint32_t fsw_use_dual_sized_pool = 0;
#endif
uint32_t fsw_chain_enqueue = 1;
static int __nx_fsw_inited = 0;
static eventhandler_tag __nx_fsw_ifnet_eventhandler_tag = NULL;
static eventhandler_tag __nx_fsw_protoctl_eventhandler_tag = NULL;
static SKMEM_TYPE_DEFINE(nx_fsw_zone, struct nx_flowswitch);
static SKMEM_TYPE_DEFINE(nx_fsw_stats_zone, struct __nx_stats_fsw);
#define SKMEM_TAG_FSW_PORTS "com.apple.skywalk.fsw.ports"
SKMEM_TAG_DEFINE(skmem_tag_fsw_ports, SKMEM_TAG_FSW_PORTS);
#define SKMEM_TAG_FSW_FOB_HASH "com.apple.skywalk.fsw.fsw.fob.hash"
SKMEM_TAG_DEFINE(skmem_tag_fsw_fob_hash, SKMEM_TAG_FSW_FOB_HASH);
#define SKMEM_TAG_FSW_FRB_HASH "com.apple.skywalk.fsw.fsw.frb.hash"
SKMEM_TAG_DEFINE(skmem_tag_fsw_frb_hash, SKMEM_TAG_FSW_FRB_HASH);
#define SKMEM_TAG_FSW_FRIB_HASH "com.apple.skywalk.fsw.fsw.frib.hash"
SKMEM_TAG_DEFINE(skmem_tag_fsw_frib_hash, SKMEM_TAG_FSW_FRIB_HASH);
#define SKMEM_TAG_FSW_FRAG_MGR "com.apple.skywalk.fsw.fsw.frag.mgr"
SKMEM_TAG_DEFINE(skmem_tag_fsw_frag_mgr, SKMEM_TAG_FSW_FRAG_MGR);
/* 64-bit mask with range */
#define BMASK64(_beg, _end) \
((NX_FSW_CHUNK_FREE >> (63 - (_end))) & ~((1ULL << (_beg)) - 1))
static int fsw_detach(struct nx_flowswitch *fsw, struct nexus_adapter *hwna,
boolean_t purge);
int
fsw_attach_vp(struct kern_nexus *nx, struct kern_channel *ch,
struct chreq *chr, struct nxbind *nxb, struct proc *p,
struct nexus_vp_adapter **vpna)
{
#pragma unused(ch)
struct nx_flowswitch *fsw = NX_FSW_PRIVATE(nx);
SK_LOG_VAR(char *cr_name = chr->cr_name);
int err = 0;
SK_LOCK_ASSERT_HELD();
ASSERT(!(chr->cr_mode & CHMODE_CONFIG));
*vpna = NULL;
/* if there's an existing adapter on the nexus port then use it */
FSW_WLOCK(fsw);
err = fsw_port_alloc(fsw, nxb, vpna, chr->cr_port, p, FALSE, FALSE);
FSW_WUNLOCK(fsw);
if (err != 0) {
ASSERT(*vpna == NULL);
goto out;
} else if (*vpna != NULL) {
/*
* Use the existing adapter on that port; fsw_port_alloc()
* callback has retained a reference count on the adapter.
*/
goto out;
}
ASSERT(*vpna == NULL);
/* create a virtual port; callee holds vpna ref */
err = fsw_vp_na_create(nx, chr, p, vpna);
if (err != 0) {
SK_ERR("vpna create failed (err %d)", err);
goto out;
}
FSW_WLOCK(fsw);
err = fsw_port_alloc(fsw, nxb, vpna, (*vpna)->vpna_nx_port, p, FALSE, FALSE);
FSW_WUNLOCK(fsw);
out:
if ((*vpna) != NULL) {
SK_DF(err ? SK_VERB_ERROR : SK_VERB_FSW,
"vpna \"%s\" (0x%llx) refs %u to fsw \"%s\" "
"nx_port %d (err %d)", (*vpna)->vpna_up.na_name,
SK_KVA(&(*vpna)->vpna_up), (*vpna)->vpna_up.na_refcount,
cr_name, (int)(*vpna)->vpna_nx_port, err);
if (err != 0) {
na_release_locked(&(*vpna)->vpna_up);
*vpna = NULL;
}
}
return err;
}
static int
fsw_nx_check(struct nx_flowswitch *fsw, struct kern_nexus *hw_nx)
{
#pragma unused(fsw)
nexus_type_t hw_nxdom_type = NX_DOM(hw_nx)->nxdom_type;
if (hw_nxdom_type != NEXUS_TYPE_NET_IF) {
return EINVAL;
}
/* it's a netif below */
return 0;
}
static int
fsw_ctl_flow_add(struct nx_flowswitch *fsw, struct proc *p,
struct nx_flow_req *req)
{
struct flow_owner *fo;
int error = 0;
ASSERT(p != PROC_NULL);
if (p != kernproc) {
/* special port shouldn't be bound via this method */
if (req->nfr_nx_port < FSW_VP_USER_MIN) {
return EINVAL;
}
req->nfr_flags |= (NXFLOWREQF_TRACK | NXFLOWREQF_FLOWADV);
} else {
/* no flow track or advisory support for bsd flow */
ASSERT((req->nfr_flags & NXFLOWREQF_TRACK) == 0);
ASSERT((req->nfr_flags & NXFLOWREQF_FLOWADV) == 0);
ASSERT((req->nfr_flags & NXFLOWREQF_LOW_LATENCY) == 0);
}
/* init kernel only fields */
if (p != kernproc) {
nx_flow_req_internalize(req);
}
req->nfr_pid = proc_pid(p);
if (req->nfr_epid == -1) {
req->nfr_epid = proc_pid(p);
}
if (req->nfr_flow_demux_count > MAX_FLOW_DEMUX_PATTERN) {
SK_ERR("invalid flow demux count %u", req->nfr_flow_demux_count);
return EINVAL;
}
fo = fsw_flow_add(fsw, req, &error);
ASSERT(fo != NULL || error != 0);
if (error == 0) {
// user space don't need this flow stats
flow_stats_release(req->nfr_flow_stats);
}
if (p != kernproc) {
nx_flow_req_externalize(req);
}
return error;
}
static int
fsw_ctl_flow_del(struct nx_flowswitch *fsw, struct proc *p,
struct nx_flow_req *req)
{
int err;
nx_flow_req_internalize(req);
req->nfr_pid = proc_pid(p);
err = fsw_flow_del(fsw, req, TRUE, NULL);
nx_flow_req_externalize(req);
return err;
}
static int
fsw_ctl_flow_config(struct nx_flowswitch *fsw, struct proc *p,
struct nx_flow_req *req)
{
int err;
nx_flow_req_internalize(req);
req->nfr_pid = proc_pid(p);
err = fsw_flow_config(fsw, req);
nx_flow_req_externalize(req);
return err;
}
#if (DEVELOPMENT || DEBUG)
static int
fsw_rps_threads_sysctl SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg2)
struct nx_flowswitch *fsw = arg1;
uint32_t nthreads;
int changed;
int error;
error = sysctl_io_number(req, fsw->fsw_rps_nthreads,
sizeof(fsw->fsw_rps_nthreads), &nthreads, &changed);
if (error == 0 && changed != 0) {
error = fsw_rps_set_nthreads(fsw, nthreads);
}
return error;
}
#endif /* !DEVELOPMENT && !DEBUG */
void
fsw_get_tso_capabilities(struct ifnet *ifp, uint32_t *tso_v4_mtu, uint32_t *tso_v6_mtu)
{
#pragma unused(ifp)
*tso_v4_mtu = 0;
*tso_v6_mtu = 0;
#ifdef XNU_TARGET_OS_OSX
struct nx_flowswitch *fsw;
fsw = fsw_ifp_to_fsw(ifp);
if (fsw == NULL) {
return;
}
switch (fsw->fsw_tso_mode) {
case FSW_TSO_MODE_HW: {
ASSERT(ifp->if_tso_v4_mtu != 0 || ifp->if_tso_v6_mtu != 0);
*tso_v4_mtu = ifp->if_tso_v4_mtu;
*tso_v6_mtu = ifp->if_tso_v6_mtu;
break;
}
case FSW_TSO_MODE_SW: {
ASSERT(fsw->fsw_tso_sw_mtu != 0);
*tso_v4_mtu = fsw->fsw_tso_sw_mtu;
*tso_v6_mtu = fsw->fsw_tso_sw_mtu;
break;
}
default:
break;
}
#endif /* XNU_TARGET_OS_OSX */
}
static void
fsw_tso_setup(struct nx_flowswitch *fsw)
{
fsw->fsw_tso_mode = FSW_TSO_MODE_NONE;
#ifdef XNU_TARGET_OS_OSX
struct ifnet *ifp = fsw->fsw_ifp;
if (!SKYWALK_CAPABLE(ifp) || !SKYWALK_NATIVE(ifp)) {
DTRACE_SKYWALK2(tso__no__support, struct nx_flowswitch *, fsw,
ifnet_t, ifp);
return;
}
struct nx_netif *nif = NA(ifp)->nifna_netif;
uint32_t large_buf_size = NX_PROV_PARAMS(fsw->fsw_nx)->nxp_large_buf_size;
if (large_buf_size == 0) {
DTRACE_SKYWALK2(no__large__buf, struct nx_flowswitch *, fsw,
ifnet_t, ifp);
return;
}
/*
* Unlike _dlil_adjust_large_buf_size_for_tso(), we check the nif_hwassist
* flags here for the original flags because nx_netif_host_adjust_if_capabilities()
* has already been called.
*/
if (((nif->nif_hwassist & IFNET_TSO_IPV4) != 0 && ifp->if_tso_v4_mtu != 0) ||
((nif->nif_hwassist & IFNET_TSO_IPV6) != 0 && ifp->if_tso_v6_mtu != 0)) {
ASSERT(large_buf_size <= ifp->if_tso_v4_mtu ||
large_buf_size <= ifp->if_tso_v6_mtu);
fsw->fsw_tso_mode = FSW_TSO_MODE_HW;
} else {
if (sk_fsw_gso_mtu != 0 && large_buf_size >= sk_fsw_gso_mtu) {
fsw->fsw_tso_mode = FSW_TSO_MODE_SW;
fsw->fsw_tso_sw_mtu = sk_fsw_gso_mtu;
}
}
DTRACE_SKYWALK3(tso__mode, struct nx_flowswitch *, fsw,
fsw_tso_mode_t, fsw->fsw_tso_mode, uint32_t, large_buf_size);
#endif /* XNU_TARGET_OS_OSX */
}
static int
fsw_setup_ifp(struct nx_flowswitch *fsw, struct nexus_adapter *hwna)
{
int error = 0;
struct ifnet *ifp = hwna->na_ifp;
struct kern_pbufpool *pp = skmem_arena_nexus(hwna->na_arena)->arn_rx_pp;
size_t f_limit = pp->pp_kmd_region->skr_c_obj_cnt / 2;
ASSERT((hwna->na_type == NA_NETIF_HOST) ||
(hwna->na_type == NA_NETIF_COMPAT_HOST));
SK_LOCK_ASSERT_HELD();
/*
* XXX: we don't support non TXSTART interface.
* There are assumptions in fsw_port_flush_enqueue_dst() about
* single threaded write to destination rings.
*/
if ((ifp->if_eflags & IFEF_TXSTART) == 0) {
SK_ERR("non TXSTART interface not supported ifp(0x%llx)",
SK_KVA(ifp));
return ENOTSUP;
}
FSW_WLOCK(fsw);
ASSERT(fsw->fsw_ifp == NULL);
ASSERT(fsw->fsw_nifna == NULL);
ASSERT(fsw->fsw_resolve == NULL);
ASSERT(fsw->fsw_frame == NULL);
ASSERT(fsw->fsw_demux == NULL);
ASSERT(fsw->fsw_pkt_copy_from_pkt == NULL);
ASSERT(fsw->fsw_pkt_copy_from_mbuf == NULL);
ASSERT(fsw->fsw_pkt_copy_to_mbuf == NULL);
fsw->fsw_ipfm = fsw_ip_frag_mgr_create(fsw, ifp, f_limit);
if (fsw->fsw_ipfm == NULL) {
FSW_WUNLOCK(fsw);
return ENOMEM;
}
switch (ifp->if_family) {
case IFNET_FAMILY_ETHERNET:
error = fsw_ethernet_setup(fsw, ifp);
fsw->fsw_ifp_dlt = DLT_EN10MB;
break;
case IFNET_FAMILY_CELLULAR:
error = fsw_cellular_setup(fsw, ifp);
fsw->fsw_ifp_dlt = DLT_RAW;
break;
default:
if (ifp->if_family == IFNET_FAMILY_IPSEC ||
ifp->if_family == IFNET_FAMILY_UTUN) {
error = fsw_ip_setup(fsw, ifp);
fsw->fsw_ifp_dlt = DLT_RAW;
break;
}
error = ENOTSUP;
break;
}
if (error != 0) {
FSW_WUNLOCK(fsw);
return error;
}
ASSERT(fsw->fsw_resolve != NULL);
if (NX_PROV(fsw->fsw_nx)->nxprov_region_params[SKMEM_REGION_KMD].
srp_max_frags > 1 || pp->pp_max_frags > 1) {
fsw->fsw_pkt_copy_from_pkt = pkt_copy_multi_buflet_from_pkt;
fsw->fsw_pkt_copy_from_mbuf = pkt_copy_multi_buflet_from_mbuf;
fsw->fsw_pkt_copy_to_mbuf = pkt_copy_multi_buflet_to_mbuf;
} else {
fsw->fsw_pkt_copy_from_pkt = pkt_copy_from_pkt;
fsw->fsw_pkt_copy_from_mbuf = pkt_copy_from_mbuf;
fsw->fsw_pkt_copy_to_mbuf = pkt_copy_to_mbuf;
}
/*
* Since it is possible for fsw to refer to the ifp after all
* underlying hwnas are freed (see fsw_teardown_ifp()), we need
* an extra reference to the ifp here.
*
* We also cache the netif adapter of the interface, as it's
* needed for each packet enqueued to the classq. There is no
* need to retain a refcnt for the same reason as above.
*
* We hold the busy lock across these, just in case an interface
* detach and reattach happens, as fsw_flow_bind() relies on the
* same lock as well before making its checks.
*/
lck_mtx_lock(&fsw->fsw_detach_barrier_lock);
ASSERT((ifp->if_eflags & IFEF_TXSTART) != 0);
fsw->fsw_ifp = ifp;
fsw->fsw_nifna = &ifp->if_na->nifna_up;
ifp->if_na->nifna_netif->nif_fsw = fsw;
ifp->if_na->nifna_netif->nif_fsw_nxadv =
fsw->fsw_nx->nx_adv.flowswitch_nxv_adv;
(void) strlcpy(fsw->fsw_flow_mgr->fm_name,
if_name(ifp), IFNAMSIZ);
fsw_classq_setup(fsw, hwna);
fsw->fsw_classq_enabled = TRUE;
fsw->fsw_src_lla_gencnt = 0;
fsw_tso_setup(fsw);
ASSERT(fsw->fsw_reap_thread != THREAD_NULL);
(void) snprintf(fsw->fsw_reap_name, sizeof(fsw->fsw_reap_name),
FSW_REAP_THREADNAME, ifp->if_xname, "");
thread_set_thread_name(fsw->fsw_reap_thread, fsw->fsw_reap_name);
error = fsw_netagent_register(fsw, ifp);
SK_DF(error ? SK_VERB_ERROR : SK_VERB_FSW,
"fsw_netagent_register %s (family %u) (err %d)",
if_name(ifp), ifp->if_family, error);
/*
* Clear NXF_REJECT to allow new channels to be opened
* to this nexus, in case this is an interface reattach.
* Otherwise this flag should already be cleared.
*/
if (error == 0) {
os_atomic_andnot(&fsw->fsw_nx->nx_flags, NXF_REJECT, relaxed);
}
lck_mtx_unlock(&fsw->fsw_detach_barrier_lock);
/*
* Wake up the reaper thread.
*/
if (error == 0) {
fsw_reap_sched(fsw);
}
/* init skoid */
skoid_create(&fsw->fsw_skoid,
SKOID_SNODE(_kern_skywalk_flowswitch), if_name(ifp),
CTLFLAG_RW);
#if (DEVELOPMENT || DEBUG)
if (SKYWALK_NATIVE(fsw->fsw_ifp)) {
skoid_add_handler(&fsw->fsw_skoid, "rps_nthreads", CTLFLAG_RW,
fsw_rps_threads_sysctl, fsw, 0);
}
#endif /* !DEVELOPMENT && !DEBUG */
FSW_WUNLOCK(fsw);
return error;
}
static void
fsw_teardown_ifp(struct nx_flowswitch *fsw, struct nexus_adapter *hwna)
{
struct ifnet *ifp;
SK_LOCK_ASSERT_HELD();
FSW_WLOCK_ASSERT_HELD(fsw);
ifp = fsw->fsw_ifp;
ASSERT(ifp != NULL);
ASSERT((ifp->if_eflags & IFEF_TXSTART) != 0);
fsw_netagent_unregister(fsw, ifp);
if (fsw->fsw_ipfm != NULL) {
fsw_ip_frag_mgr_destroy(fsw->fsw_ipfm);
}
skoid_destroy(&fsw->fsw_skoid);
SK_DF(SK_VERB_FSW, "%sdetached from %s (family %u)",
((fsw->fsw_agent_session != NULL) ? "netagent" : ""),
if_name(ifp), ifp->if_family);
if (hwna != NULL) {
fsw_classq_teardown(fsw, hwna);
}
/*
* Set NXF_REJECT on the nexus, which would cause existing adapters
* to be marked similarly; channels associated with them would then
* cease to function.
*/
os_atomic_or(&fsw->fsw_nx->nx_flags, NXF_REJECT, relaxed);
/* see notes on fsw_na_attach() about I/O refcnt */
if (ifp->if_na != NULL) {
ifp->if_na->nifna_netif->nif_fsw = NULL;
ifp->if_na->nifna_netif->nif_fsw_nxadv = NULL;
os_atomic_thread_fence(seq_cst);
}
fsw->fsw_ifp = NULL;
fsw->fsw_nifna = NULL;
fsw->fsw_resolve = NULL;
fsw->fsw_frame = NULL;
fsw->fsw_frame_headroom = 0;
fsw->fsw_demux = NULL;
fsw->fsw_classq_enabled = FALSE;
fsw->fsw_pkt_copy_from_pkt = NULL;
fsw->fsw_pkt_copy_from_mbuf = NULL;
fsw->fsw_pkt_copy_to_mbuf = NULL;
if (ifp->if_input_netem != NULL) {
netem_destroy(ifp->if_input_netem);
ifp->if_input_netem = NULL;
}
ASSERT(fsw->fsw_reap_thread != THREAD_NULL);
(void) snprintf(fsw->fsw_reap_name, sizeof(fsw->fsw_reap_name),
FSW_REAP_THREADNAME, if_name(ifp), "_detached");
thread_set_thread_name(fsw->fsw_reap_thread, fsw->fsw_reap_name);
}
static int
fsw_host_setup(struct nx_flowswitch *fsw)
{
struct nexus_adapter *hwna;
struct ifnet *ifp;
SK_LOCK_ASSERT_HELD();
hwna = fsw->fsw_host_ch->ch_na;
ASSERT(hwna != NULL);
/* the netif below must have an ifnet attached (dev/host port) */
if ((ifp = hwna->na_ifp) == NULL) {
return ENXIO;
}
/*
* XXX: we don't support multiple rx rings yet.
* There are assumptions in fsw_port_flush_enqueue_dst() about
* single threaded write to destination rings.
*/
if (SKYWALK_NATIVE(ifp) && (hwna->na_num_rx_rings > 1)) {
SK_ERR("ifp(0x%llx): multiple rx rings(%d) not supported",
SK_KVA(ifp), hwna->na_num_rx_rings);
return ENOTSUP;
}
lck_mtx_lock(&fsw->fsw_detach_barrier_lock);
if ((fsw->fsw_detach_flags & FSW_DETACHF_DETACHING) != 0) {
lck_mtx_unlock(&fsw->fsw_detach_barrier_lock);
return EBUSY;
}
fsw->fsw_detach_flags = 0;
lck_mtx_unlock(&fsw->fsw_detach_barrier_lock);
int error = fsw_setup_ifp(fsw, hwna);
ASSERT(error != 0 || fsw->fsw_ifp != NULL);
if (error != 0) {
return error;
}
/* update the interface index */
ASSERT(NX_PROV(fsw->fsw_nx)->nxprov_params->nxp_ifindex == 0);
NX_PROV(fsw->fsw_nx)->nxprov_params->nxp_ifindex = ifp->if_index;
return 0;
}
static int
fsw_host_teardown(struct nx_flowswitch *fsw)
{
struct nexus_adapter *hwna = fsw->fsw_host_ch->ch_na;
SK_LOCK_ASSERT_HELD();
return fsw_detach(fsw, hwna, FALSE);
}
#if SK_LOG
/* Hoisted out of line to reduce kernel stack footprint */
SK_LOG_ATTRIBUTE
static void
fsw_ctl_attach_log(const struct nx_spec_req *nsr,
const struct kern_nexus *nx, int err)
{
uuid_string_t uuidstr, ifuuidstr;
const char *nustr;
if (nsr->nsr_flags & NXSPECREQ_UUID) {
nustr = sk_uuid_unparse(nsr->nsr_uuid, uuidstr);
} else if (nsr->nsr_flags & NXSPECREQ_IFP) {
(void) snprintf((char *)uuidstr, sizeof(uuidstr), "0x%llx",
SK_KVA(nsr->nsr_ifp));
nustr = uuidstr;
} else {
nustr = nsr->nsr_name;
}
SK_DF(err ? SK_VERB_ERROR : SK_VERB_FSW,
"nexus 0x%llx (%s) name/uuid \"%s\" if_uuid %s flags 0x%x err %d",
SK_KVA(nx), NX_DOM_PROV(nx)->nxdom_prov_name, nustr,
sk_uuid_unparse(nsr->nsr_if_uuid, ifuuidstr), nsr->nsr_flags, err);
}
#endif /* SK_LOG */
SK_NO_INLINE_ATTRIBUTE
static void
fsw_netif_set_callbacks_common(struct nx_flowswitch *fsw, boolean_t set)
{
struct nexus_adapter *hwna = fsw->fsw_dev_ch->ch_na;
ASSERT(hwna->na_type == NA_NETIF_DEV ||
hwna->na_type == NA_NETIF_COMPAT_DEV);
if (set) {
netif_hwna_set_mode(hwna, NETIF_MODE_FSW, fsw_devna_rx);
} else {
netif_hwna_clear_mode(hwna);
}
}
SK_NO_INLINE_ATTRIBUTE
static void
fsw_netif_set_callbacks(struct nx_flowswitch *fsw)
{
fsw_netif_set_callbacks_common(fsw, TRUE);
}
SK_NO_INLINE_ATTRIBUTE
static void
fsw_netif_clear_callbacks(struct nx_flowswitch *fsw)
{
fsw_netif_set_callbacks_common(fsw, FALSE);
}
SK_NO_INLINE_ATTRIBUTE
static void
fsw_dp_start(struct nx_flowswitch *fsw)
{
ASSERT(fsw->fsw_dev_ch != NULL);
ASSERT(fsw->fsw_host_ch != NULL);
fsw_netif_set_callbacks(fsw);
na_start_spec(fsw->fsw_dev_ch->ch_nexus, fsw->fsw_dev_ch);
na_start_spec(fsw->fsw_host_ch->ch_nexus, fsw->fsw_host_ch);
}
SK_NO_INLINE_ATTRIBUTE
static int
fsw_dp_stop(struct nx_flowswitch *fsw, struct ifnet **ifpp)
{
struct ifnet *ifp;
FSW_WLOCK(fsw);
if ((fsw->fsw_state_flags & FSW_STATEF_QUIESCED) != 0) {
FSW_WUNLOCK(fsw);
return EALREADY;
}
fsw->fsw_state_flags |= FSW_STATEF_QUIESCED;
FSW_WUNLOCK(fsw);
/*
* For regular kernel-attached interfaces, quiescing is handled by
* the ifnet detach thread, which calls dlil_quiesce_and_detach_nexuses().
* For interfaces created by skywalk test cases, flowswitch/netif nexuses
* are constructed on the fly and can also be torn down on the fly.
* dlil_quiesce_and_detach_nexuses() won't help here because any nexus
* can be detached while the interface is still attached.
*/
if ((ifp = fsw->fsw_ifp) != NULL &&
ifnet_datamov_suspend_if_needed(ifp)) {
SK_UNLOCK();
ifnet_datamov_drain(ifp);
/* Reference will be released by caller */
*ifpp = ifp;
SK_LOCK();
}
ASSERT(fsw->fsw_dev_ch != NULL);
ASSERT(fsw->fsw_host_ch != NULL);
na_stop_spec(fsw->fsw_host_ch->ch_nexus, fsw->fsw_host_ch);
na_stop_spec(fsw->fsw_dev_ch->ch_nexus, fsw->fsw_dev_ch);
fsw_netif_clear_callbacks(fsw);
return 0;
}
SK_NO_INLINE_ATTRIBUTE
static int
fsw_netif_port_setup(struct nx_flowswitch *fsw, struct kern_nexus *hw_nx,
boolean_t host)
{
struct chreq chr;
struct kern_channel *ch;
int err;
bzero(&chr, sizeof(chr));
uuid_copy(chr.cr_spec_uuid, hw_nx->nx_uuid);
chr.cr_ring_id = CHANNEL_RING_ID_ANY;
chr.cr_port = host ? NEXUS_PORT_NET_IF_HOST : NEXUS_PORT_NET_IF_DEV;
chr.cr_mode |= CHMODE_CONFIG | (host ? CHMODE_HOST : 0);
err = 0;
ch = ch_open_special(hw_nx, &chr, FALSE, &err);
if (ch == NULL) {
SK_ERR("ch_open_special(%s) failed: %d",
host ? "host" : "dev", err);
return err;
}
if (host) {
fsw->fsw_host_ch = ch;
} else {
fsw->fsw_dev_ch = ch;
}
return 0;
}
SK_NO_INLINE_ATTRIBUTE
static int
fsw_netif_port_teardown(struct nx_flowswitch *fsw, boolean_t host)
{
struct kern_channel *ch;
ch = host ? fsw->fsw_host_ch : fsw->fsw_dev_ch;
if (ch == NULL) {
return EINVAL;
}
if (host) {
fsw->fsw_host_ch = NULL;
} else {
fsw->fsw_dev_ch = NULL;
}
ch_close_special(ch);
(void) ch_release_locked(ch);
return 0;
}
SK_NO_INLINE_ATTRIBUTE
static int
fsw_devna_setup(struct nx_flowswitch *fsw, struct kern_nexus *hw_nx)
{
return fsw_netif_port_setup(fsw, hw_nx, FALSE);
}
SK_NO_INLINE_ATTRIBUTE
static int
fsw_hostna_setup(struct nx_flowswitch *fsw, struct kern_nexus *hw_nx)
{
return fsw_netif_port_setup(fsw, hw_nx, TRUE);
}
SK_NO_INLINE_ATTRIBUTE
static int
fsw_devna_teardown(struct nx_flowswitch *fsw)
{
return fsw_netif_port_teardown(fsw, FALSE);
}
SK_NO_INLINE_ATTRIBUTE
static int
fsw_hostna_teardown(struct nx_flowswitch *fsw)
{
return fsw_netif_port_teardown(fsw, TRUE);
}
/* Process NXCFG_CMD_ATTACH */
SK_NO_INLINE_ATTRIBUTE
static int
fsw_ctl_attach(struct kern_nexus *nx, struct proc *p, struct nx_spec_req *nsr)
{
#pragma unused(p)
struct nx_flowswitch *fsw = NX_FSW_PRIVATE(nx);
struct kern_nexus *hw_nx = NULL;
int err = 0;
SK_LOCK_ASSERT_HELD();
/*
* The flowswitch only accepts UUID as an identifier, since it
* represents the UUID of the kernel object we are trying to
* attach to this flowswitch.
*/
if ((nsr->nsr_flags & (NXSPECREQ_UUID | NXSPECREQ_IFP)) !=
NXSPECREQ_UUID || uuid_is_null(nsr->nsr_uuid)) {
err = EINVAL;
goto done;
}
if (fsw->fsw_dev_ch != NULL) {
ASSERT(fsw->fsw_host_ch != NULL);
err = EEXIST;
goto done;
}
hw_nx = nx_find(nsr->nsr_uuid, TRUE);
if (hw_nx == NULL) {
err = ENOENT;
goto done;
} else if (hw_nx == nx) {
err = EINVAL;
goto done;
}
/* preflight check to see if the nexus is attachable to us */
err = fsw_nx_check(fsw, hw_nx);
if (err != 0) {
goto done;
}
err = fsw_devna_setup(fsw, hw_nx);
if (err != 0) {
goto done;
}
err = fsw_hostna_setup(fsw, hw_nx);
if (err != 0) {
(void) fsw_devna_teardown(fsw);
goto done;
}
err = fsw_host_setup(fsw);
if (err != 0) {
(void) fsw_hostna_teardown(fsw);
(void) fsw_devna_teardown(fsw);
goto done;
}
fsw_dp_start(fsw);
/* return the devna UUID */
uuid_copy(nsr->nsr_if_uuid, fsw->fsw_dev_ch->ch_na->na_uuid);
ASSERT(!uuid_is_null(nsr->nsr_if_uuid));
done:
#if SK_LOG
if (__improbable(sk_verbose != 0)) {
fsw_ctl_attach_log(nsr, nx, err);
}
#endif /* SK_LOG */
if (hw_nx != NULL) {
nx_release_locked(hw_nx);
}
return err;
}
SK_NO_INLINE_ATTRIBUTE
static void
fsw_cleanup(struct nx_flowswitch *fsw)
{
int err;
struct ifnet *ifp = NULL;
if (fsw->fsw_dev_ch == NULL) {
ASSERT(fsw->fsw_host_ch == NULL);
return;
}
err = fsw_dp_stop(fsw, &ifp);
if (err != 0) {
return;
}
err = fsw_host_teardown(fsw);
VERIFY(err == 0);
err = fsw_hostna_teardown(fsw);
VERIFY(err == 0);
err = fsw_devna_teardown(fsw);
VERIFY(err == 0);
if (ifp != NULL) {
ifnet_datamov_resume(ifp);
}
}
int
fsw_ctl_detach(struct kern_nexus *nx, struct proc *p,
struct nx_spec_req *nsr)
{
#pragma unused(p)
struct nx_flowswitch *fsw = NX_FSW_PRIVATE(nx);
int err = 0;
SK_LOCK_ASSERT_HELD();
/*
* nsr is NULL when we're called from the destructor, and it
* implies that we'll detach everything that is attached.
*/
if (nsr == NULL) {
fsw_cleanup(fsw);
ASSERT(fsw->fsw_dev_ch == NULL);
ASSERT(fsw->fsw_host_ch == NULL);
goto done;
}
if (uuid_is_null(nsr->nsr_if_uuid)) {
err = EINVAL;
goto done;
} else if (fsw->fsw_dev_ch == NULL || fsw->fsw_host_ch == NULL) {
err = ENXIO;
goto done;
}
/* check if the devna uuid is correct */
if (uuid_compare(nsr->nsr_if_uuid,
fsw->fsw_dev_ch->ch_na->na_uuid) != 0) {
err = ESRCH;
goto done;
}
fsw_cleanup(fsw);
done:
#if SK_LOG
if (nsr != NULL) {
uuid_string_t ifuuidstr;
SK_DF(err ? SK_VERB_ERROR : SK_VERB_FSW,
"nexus 0x%llx (%s) if_uuid %s flags 0x%x err %d",
SK_KVA(nx), NX_DOM_PROV(nx)->nxdom_prov_name,
sk_uuid_unparse(nsr->nsr_if_uuid, ifuuidstr),
nsr->nsr_flags, err);
} else {
SK_DF(err ? SK_VERB_ERROR : SK_VERB_FSW,
"nexus 0x%llx (%s) ANY err %d", SK_KVA(nx),
NX_DOM_PROV(nx)->nxdom_prov_name, err);
}
#endif /* SK_LOG */
return err;
}
static int
fsw_netem_config(struct nx_flowswitch *fsw, void *data)
{
struct ifnet *ifp = fsw->fsw_ifp;
struct if_netem_params *params = data;
int ret;
if (ifp == NULL) {
return ENODEV;
}
SK_LOCK_ASSERT_HELD();
#define fsw_INPUT_NETEM_THREADNAME "if_input_netem_%s@fsw"
#define fsw_INPUT_NETEM_THREADNAME_LEN 32
char netem_name[fsw_INPUT_NETEM_THREADNAME_LEN];
(void) snprintf(netem_name, sizeof(netem_name),
fsw_INPUT_NETEM_THREADNAME, if_name(ifp));
ret = netem_config(&ifp->if_input_netem, netem_name, ifp, params, fsw,
fsw_dev_input_netem_dequeue, FSW_VP_DEV_BATCH_MAX);
return ret;
}
int
fsw_ctl(struct kern_nexus *nx, nxcfg_cmd_t nc_cmd, struct proc *p,
void *data)
{
struct nx_flowswitch *fsw = NX_FSW_PRIVATE(nx);
struct nx_spec_req *nsr = data;
struct nx_flow_req *req = data;
boolean_t need_check;
int error = 0;
switch (nc_cmd) {
case NXCFG_CMD_FLOW_ADD:
case NXCFG_CMD_FLOW_DEL:
if (uuid_is_null(req->nfr_flow_uuid)) {
error = EINVAL;
goto done;
}
if (p != kernproc) {
req->nfr_flags &= NXFLOWREQF_MASK;
}
req->nfr_flowadv_idx = FLOWADV_IDX_NONE;
if (nc_cmd == NXCFG_CMD_FLOW_DEL) {
break;
}
need_check = FALSE;
if (req->nfr_epid != -1 && proc_pid(p) != req->nfr_epid) {
need_check = TRUE;
} else if (!uuid_is_null(req->nfr_euuid)) {
uuid_t uuid;
/* get the UUID of the issuing process */
proc_getexecutableuuid(p, uuid, sizeof(uuid));
/*
* If this is not issued by a process for its own
* executable UUID and if the process does not have
* the necessary privilege, reject the request.
* The logic is similar to so_set_effective_uuid().
*/
if (uuid_compare(req->nfr_euuid, uuid) != 0) {
need_check = TRUE;
}
}
if (need_check) {
kauth_cred_t cred = kauth_cred_proc_ref(p);
error = priv_check_cred(cred,
PRIV_NET_PRIVILEGED_SOCKET_DELEGATE, 0);
kauth_cred_unref(&cred);
if (error != 0) {
goto done;
}
}
break;
default:
break;
}
switch (nc_cmd) {
case NXCFG_CMD_ATTACH:
error = fsw_ctl_attach(nx, p, nsr);
break;
case NXCFG_CMD_DETACH:
error = fsw_ctl_detach(nx, p, nsr);
break;
case NXCFG_CMD_FLOW_ADD: /* struct nx_flow_req */
error = fsw_ctl_flow_add(fsw, p, data);
break;
case NXCFG_CMD_FLOW_DEL: /* struct nx_flow_req */
error = fsw_ctl_flow_del(fsw, p, data);
break;
case NXCFG_CMD_FLOW_CONFIG:
error = fsw_ctl_flow_config(fsw, p, data);
break;
case NXCFG_CMD_NETEM: /* struct if_netem_params */
error = fsw_netem_config(fsw, data);
break;
default:
SK_ERR("invalid cmd %u", nc_cmd);
error = EINVAL;
break;
}
done:
return error;
}
struct nx_flowswitch *
fsw_ifp_to_fsw(struct ifnet *ifp)
{
struct nx_flowswitch *fsw = NULL;
if (ifp->if_na != NULL) {
fsw = ifp->if_na->nifna_netif->nif_fsw;
}
return fsw;
}
static void
fsw_ifnet_event_callback(struct eventhandler_entry_arg ee_arg __unused,
struct ifnet *ifp, struct sockaddr *ip_addr __unused,
intf_event_code_t intf_ev_code)
{
struct nx_flowswitch *fsw = NULL;
if (ifp->if_na == NULL) {
return;
}
SK_LOCK();
fsw = fsw_ifp_to_fsw(ifp);
if (fsw != NULL) {
switch (intf_ev_code) {
case INTF_EVENT_CODE_LLADDR_UPDATE:
if ((fsw->fsw_ifp == NULL) ||
(fsw->fsw_ifp_dlt != DLT_EN10MB)) {
break;
}
VERIFY(fsw->fsw_ifp == ifp);
SK_DF(SK_VERB_FSW, "MAC address change detected for %s",
if_name(fsw->fsw_ifp));
(void) ifnet_lladdr_copy_bytes(ifp, fsw->fsw_ether_shost,
ETHER_ADDR_LEN);
os_atomic_inc(&fsw->fsw_src_lla_gencnt, relaxed);
break;
case INTF_EVENT_CODE_LOW_POWER_UPDATE:
if (fsw->fsw_ifp == NULL) {
break;
}
VERIFY(fsw->fsw_ifp == ifp);
if (ifp->if_xflags & IFXF_LOW_POWER) {
SK_DF(SK_VERB_FSW,
"Low power mode updated for %s",
if_name(fsw->fsw_ifp));
fsw_reap_sched(fsw);
}
break;
default:
break;
}
}
SK_UNLOCK();
}
static void
fsw_protoctl_event_callback(struct eventhandler_entry_arg ee_arg,
struct ifnet *ifp, struct sockaddr *p_laddr, struct sockaddr *p_raddr,
uint16_t lport, uint16_t rport, uint8_t proto, uint32_t protoctl_event_code,
struct protoctl_ev_val *p_val)
{
#pragma unused(ee_arg)
struct nx_flowswitch *fsw = NULL;
struct flow_entry *fe = NULL;
boolean_t netagent_update_flow = FALSE;
uuid_t fe_uuid;
if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) {
return;
}
/*
* XXX Right now only handle the event if we have enough
* information to match the entire flow.
*/
if (lport == 0 || rport == 0 || p_laddr == NULL || p_raddr == NULL) {
return;
}
SK_LOCK();
fsw = fsw_ifp_to_fsw(ifp);
if (fsw == NULL) {
goto out;
}
if (!fsw_detach_barrier_add(fsw)) {
fsw = NULL;
SK_ERR("netagent detached");
goto out;
}
struct flow_key fk __sk_aligned(16);
FLOW_KEY_CLEAR(&fk);
fk.fk_proto = proto;
if (p_laddr->sa_family == AF_INET) {
fk.fk_ipver = IPVERSION;
fk.fk_src4 = SIN(p_laddr)->sin_addr;
fk.fk_dst4 = SIN(p_raddr)->sin_addr;
} else {
fk.fk_ipver = IPV6_VERSION;
fk.fk_src6 = SIN6(p_laddr)->sin6_addr;
/*
* rdar://107435899 The scope ID for destination address needs
* to be cleared out before looking up the flow entry for this
* 5-tuple, because addresses in flow entries do not contain the
* scope ID.
*/
struct in6_addr *in6;
fk.fk_dst6 = SIN6(p_raddr)->sin6_addr;
in6 = &fk.fk_dst6;
if (in6_embedded_scope && IN6_IS_SCOPE_EMBED(in6)) {
in6->s6_addr16[1] = 0;
}
}
fk.fk_sport = lport;
fk.fk_dport = rport;
fk.fk_mask = FKMASK_5TUPLE;
fe = flow_mgr_find_fe_by_key(fsw->fsw_flow_mgr, &fk);
if (__improbable(fe == NULL)) {
goto out;
}
uuid_copy(fe_uuid, fe->fe_uuid);
/*
* If the protocol notification is for TCP, make sure
* protocol event received is for bytes in the flight.
* XXX Redirect events are not delivered as protocol events
* but as better route events.
* Also redirect events do not indicate loss of the packet.
*/
if (proto != IPPROTO_TCP) {
p_val->tcp_seq_number = 0;
}
netagent_update_flow = TRUE;
out:
SK_UNLOCK();
if (netagent_update_flow) {
int error = 0;
#if SK_LOG
char dbgbuf[FLOWENTRY_DBGBUF_SIZE];
SK_DF(SK_VERB_FLOW, "Update flow entry \"%s\" for protocol "
"event %d with value %d and tcp sequence number %d",
fe_as_string(fe, dbgbuf, sizeof(dbgbuf)),
protoctl_event_code, p_val->val, p_val->tcp_seq_number);
#endif /* SK_LOG */
if ((error = netagent_update_flow_protoctl_event(
fsw->fsw_agent_session, fe_uuid, protoctl_event_code,
p_val->val, p_val->tcp_seq_number)) != 0) {
#if SK_LOG
SK_DF(SK_VERB_FLOW, "Error: %d. Could not update "
"flow entry \"%s\" for protocol event %d with "
"value %d and tcp sequence number %d", error,
dbgbuf, protoctl_event_code, p_val->val,
p_val->tcp_seq_number);
#endif /* SK_LOG */
}
}
if (fe != NULL) {
flow_entry_release(&fe);
}
if (fsw != NULL) {
fsw_detach_barrier_remove(fsw);
}
}
int
fsw_netagent_add_remove(struct kern_nexus *nx, boolean_t add)
{
struct nx_flowswitch *fsw = NULL;
int error = 0;
SK_LOCK_ASSERT_HELD();
VERIFY(nx != NULL);
VERIFY(NX_PROV(nx) != NULL);
VERIFY(NX_DOM_PROV(nx) != NULL);
if (NX_DOM(nx)->nxdom_type != NEXUS_TYPE_FLOW_SWITCH) {
error = EINVAL;
goto out;
}
fsw = NX_FSW_PRIVATE(nx);
VERIFY(fsw != NULL);
FSW_WLOCK(fsw);
if (fsw->fsw_agent_session == NULL) {
error = ENXIO;
goto out;
}
ASSERT(!uuid_is_null(fsw->fsw_agent_uuid));
if (add) {
if (FSW_NETAGENT_ADDED(fsw)) {
/* agent already added */
error = EEXIST;
} else if (fsw->fsw_ifp->if_bridge != NULL) {
/* see rdar://107076453 */
SK_ERR("%s is bridged, not adding netagent",
if_name(fsw->fsw_ifp));
error = EBUSY;
} else {
fsw->fsw_state_flags |= FSW_STATEF_NETAGENT_ADDED;
if (if_is_fsw_netagent_enabled()) {
fsw->fsw_state_flags
|= FSW_STATEF_NETAGENT_ENABLED;
}
if_add_netagent(fsw->fsw_ifp, fsw->fsw_agent_uuid);
SK_D("flowswitch netagent added for interface %s",
if_name(fsw->fsw_ifp));
}
} else {
if (!FSW_NETAGENT_ADDED(fsw)) {
/* agent has not been added */
error = ENOENT;
} else {
fsw->fsw_state_flags &= ~(FSW_STATEF_NETAGENT_ADDED |
FSW_STATEF_NETAGENT_ENABLED);
if_delete_netagent(fsw->fsw_ifp, fsw->fsw_agent_uuid);
SK_D("flowswitch netagent removed for interface %s",
if_name(fsw->fsw_ifp));
}
}
out:
if (fsw != NULL) {
FSW_UNLOCK(fsw);
}
return error;
}
void
fsw_netagent_update(struct kern_nexus *nx)
{
struct nx_flowswitch *fsw = NULL;
SK_LOCK_ASSERT_HELD();
VERIFY(nx != NULL);
VERIFY(NX_PROV(nx) != NULL);
VERIFY(NX_DOM_PROV(nx) != NULL);
if (NX_DOM(nx)->nxdom_type != NEXUS_TYPE_FLOW_SWITCH) {
goto out;
}
fsw = NX_FSW_PRIVATE(nx);
VERIFY(fsw != NULL);
FSW_WLOCK(fsw);
if (fsw->fsw_agent_session == NULL) {
goto out;
}
ASSERT(!uuid_is_null(fsw->fsw_agent_uuid));
uint32_t flags = netagent_get_flags(fsw->fsw_agent_uuid);
const bool ip_agent = ifnet_needs_fsw_ip_netagent(fsw->fsw_ifp);
const bool transport_agent = ifnet_needs_fsw_transport_netagent(fsw->fsw_ifp);
if (ip_agent || transport_agent) {
flags |= NETAGENT_FLAG_NEXUS_LISTENER;
} else {
flags &= ~NETAGENT_FLAG_NEXUS_LISTENER;
}
if (transport_agent) {
flags |= NETAGENT_FLAG_NEXUS_PROVIDER;
} else {
flags &= ~NETAGENT_FLAG_NEXUS_PROVIDER;
}
if (ip_agent) {
flags |= NETAGENT_FLAG_CUSTOM_IP_NEXUS;
} else {
flags &= ~NETAGENT_FLAG_CUSTOM_IP_NEXUS;
}
if (netagent_set_flags(fsw->fsw_agent_uuid, flags) == 0) {
SK_D("flowswitch netagent updated for interface %s",
if_name(fsw->fsw_ifp));
}
out:
if (fsw != NULL) {
FSW_UNLOCK(fsw);
}
}
static int
fsw_port_ctor(struct nx_flowswitch *fsw, struct nexus_vp_adapter *vpna,
const struct nxbind *nxb)
{
#pragma unused(nxb)
int err = 0;
SK_LOCK_ASSERT_HELD();
ASSERT(nxb == NULL || !(nxb->nxb_flags & NXBF_MATCH_UNIQUEID) ||
vpna->vpna_pid == nxb->nxb_pid);
/*
* Reject regular channel open requests unless there is
* something attached to the host port of the flowswitch.
*/
if (vpna->vpna_nx_port >= FSW_VP_USER_MIN) {
struct nexus_adapter *na = &vpna->vpna_up;
struct ifnet *ifp = fsw->fsw_ifp;
if (ifp == NULL) {
err = ENXIO;
goto done;
}
/* if adapter supports mitigation, set default value */
if (na->na_flags & (NAF_TX_MITIGATION | NAF_RX_MITIGATION)) {
if (IFNET_IS_WIFI(ifp)) {
na->na_ch_mit_ival = CH_MIT_IVAL_WIFI;
} else if (IFNET_IS_CELLULAR(ifp)) {
na->na_ch_mit_ival = CH_MIT_IVAL_CELLULAR;
} else if (IFNET_IS_ETHERNET(ifp)) {
na->na_ch_mit_ival = CH_MIT_IVAL_ETHERNET;
} else {
na->na_ch_mit_ival = CH_MIT_IVAL_DEFAULT;
}
}
}
done:
SK_DF(err ? SK_VERB_ERROR : SK_VERB_FSW,
"fsw 0x%llx nx_port %d vpna_pid %d vpna_pid_bound %u mit_ival %llu "
"(err %d)", SK_KVA(fsw), (int)vpna->vpna_nx_port, vpna->vpna_pid,
vpna->vpna_pid_bound, vpna->vpna_up.na_ch_mit_ival, err);
return err;
}
static bool
fsw_port_dtor(struct nx_flowswitch *fsw, const struct nexus_vp_adapter *vpna)
{
struct flow_mgr *fm = fsw->fsw_flow_mgr;
nexus_port_t nx_port = vpna->vpna_nx_port;
uint32_t purge_cnt;
ASSERT(fsw == vpna->vpna_fsw);
ASSERT(nx_port != NEXUS_PORT_ANY);
/*
* If this nexus port was bound to a PID, we just need to look at a
* single bucket and iterate from there. Note that in any case, we
* can't just search for a single flow_owner based on the PID itself,
* since a given process may be opening multiple channels to the
* flowswitch; hence we search for the ones matching this nexus port.
*
* Close any open flows on the port and remove the flow owner and
* nexus port binding.
*/
purge_cnt = flow_owner_detach_nexus_port(fm, vpna->vpna_pid_bound,
vpna->vpna_pid, nx_port, FALSE);
SK_DF(SK_VERB_FSW,
"fsw 0x%llx nx_port %d pid %d pid_bound %u defunct %u "
"purged %u", SK_KVA(fsw), (int)nx_port,
vpna->vpna_pid, vpna->vpna_pid_bound, vpna->vpna_defunct,
purge_cnt);
return purge_cnt != 0;
}
/*
* Flowswitch nexus port allocator.
*
* A nexus port is represented by a bit in the port bitmap; its state is
* either free or allocated. A free state implies that the port has no
* nxbind AND no nexus adapter association. An allocated state means that
* either it has a nxbind OR a nexus adapter assocation. This routine
* manages the nexus adapter association with a nexus port; nxbind is
* handled separately via nx_fsw_port_bind().
*
* The caller of this routine may optionally pass in a NULL nexus adapter.
* In such a case (*vpna is NULL), this routine checks to see if the port
* has already been associated with an adapter, and returns a reference to
* that adapter. No action is taken on a port that doesn't have an adapter
* associated. Otherwise (*vpna is non-NULL), this routine associates that
* adapter with a port that's not already associated with one; the reference
* to the adapter is untouched here, as the caller is expected to handle it.
*
* The flowswitch code invokes this routine each time it is requested to
* find an adapter via nx_fsw_na_find(). The counterpart of this routine,
* nx_fsw_port_free(), is only executed ONCE by the adapter's destructor.
* This allows for multiple channels to be opened to a nexus port, each
* time holding a reference to that same nexus adapter. The releasing of
* the nexus port only happens when the last channel closes.
*/
static int
fsw_port_alloc__(struct nx_flowswitch *fsw, struct nxbind *nxb,
struct nexus_vp_adapter **vpna, nexus_port_t nx_port, struct proc *p)
{
struct kern_nexus *nx = fsw->fsw_nx;
boolean_t refonly = FALSE;
int error = 0;
FSW_WLOCK_ASSERT_HELD(fsw);
error = nx_port_alloc(nx, nx_port, nxb, (struct nexus_adapter **)vpna, p);
if (error == 0 && *vpna != NULL && !refonly) {
/* initialize the nexus port and the adapter occupying it */
(*vpna)->vpna_fsw = fsw;
(*vpna)->vpna_nx_port = nx_port;
(*vpna)->vpna_pid = proc_pid(p);
if (nxb != NULL && (nxb->nxb_flags & NXBF_MATCH_UNIQUEID)) {
ASSERT((*vpna)->vpna_pid == nxb->nxb_pid);
(*vpna)->vpna_pid_bound = TRUE;
} else {
(*vpna)->vpna_pid_bound = FALSE;
}
error = fsw_port_ctor(fsw, *vpna, nxb);
if (error != 0) {
fsw_port_free(fsw, (*vpna),
(*vpna)->vpna_nx_port, FALSE);
}
}
#if SK_LOG
if (*vpna != NULL) {
SK_DF(error ? SK_VERB_ERROR : SK_VERB_FSW,
"+++ vpna \"%s\" (0x%llx) <-> fsw 0x%llx "
"%sport %d refonly %u (err %d)",
(*vpna)->vpna_up.na_name, SK_KVA(*vpna), SK_KVA(fsw),
nx_fsw_dom_port_is_reserved(nx, nx_port) ?
"[reserved] " : "", (int)nx_port, refonly, error);
} else {
SK_DF(error ? SK_VERB_ERROR : SK_VERB_FSW,
"+++ fsw 0x%llx nx_port %d refonly %u "
"(err %d)", SK_KVA(fsw), (int)nx_port, refonly, error);
}
#endif /* SK_LOG */
return error;
}
int
fsw_port_alloc(struct nx_flowswitch *fsw, struct nxbind *nxb,
struct nexus_vp_adapter **vpna, nexus_port_t nx_port, struct proc *p,
boolean_t ifattach, boolean_t host)
{
int err = 0;
FSW_WLOCK_ASSERT_HELD(fsw);
if (ifattach) {
/* override port to either NX_FSW_{HOST,DEV} */
nx_port = (host ? FSW_VP_HOST : FSW_VP_DEV);
/* allocate reserved port for ifattach */
err = fsw_port_alloc__(fsw, nxb, vpna, nx_port, p);
} else if (host) {
/* host is valid only for ifattach */
err = EINVAL;
} else {
/* nexus port otherwise (reserve dev and host for ifattach) */
err = fsw_port_alloc__(fsw, nxb, vpna, nx_port, p);
}
return err;
}
/*
* Remove nexus port association from a nexus adapter. This call is
* the opposite of fsw_port_alloc(), except that it is called only
* at nx_fsw_vp_na_dtor() destructor time. See above notes
* on fsw_port_alloc().
*/
void
fsw_port_free(struct nx_flowswitch *fsw, struct nexus_vp_adapter *vpna,
nexus_port_t nx_port, boolean_t defunct)
{
struct kern_nexus *nx = fsw->fsw_nx;
FSW_WLOCK_ASSERT_HELD(fsw);
ASSERT(vpna->vpna_fsw == fsw);
if (defunct) {
vpna->vpna_defunct = TRUE;
nx_port_defunct(nx, nx_port);
}
bool destroyed = fsw_port_dtor(fsw, vpna);
if (destroyed) {
/*
* If the extension's destructor no longer needs to be
* bound to any channel client, release the binding.
*/
nx_port_unbind(nx, nx_port);
}
/*
* If this is a defunct, then stop here as the port is still
* occupied by the channel. We'll come here again later when
* the actual close happens.
*/
if (defunct) {
return;
}
SK_DF(SK_VERB_FSW, "--- vpna \"%s\" (0x%llx) -!- fsw 0x%llx "
"nx_port %d defunct %u", vpna->vpna_up.na_name, SK_KVA(vpna),
SK_KVA(fsw), (int)nx_port, vpna->vpna_defunct);
nx_port_free(nx, nx_port);
vpna->vpna_fsw = NULL;
vpna->vpna_nx_port = NEXUS_PORT_ANY;
vpna->vpna_pid_bound = FALSE;
vpna->vpna_pid = -1;
vpna->vpna_defunct = FALSE;
}
int
fsw_port_na_activate(struct nx_flowswitch *fsw,
struct nexus_vp_adapter *vpna, na_activate_mode_t mode)
{
struct flow_mgr *fm = fsw->fsw_flow_mgr;
uint32_t fo_cnt = 0;
SK_LOCK_ASSERT_HELD();
/* The following code relies on the static value asserted below */
_CASSERT(FSW_VP_DEV == 0);
_CASSERT(FSW_VP_HOST == 1);
ASSERT(NA_IS_ACTIVE(&vpna->vpna_up));
ASSERT(vpna->vpna_nx_port != NEXUS_PORT_ANY);
switch (mode) {
case NA_ACTIVATE_MODE_ON:
break;
case NA_ACTIVATE_MODE_DEFUNCT:
break;
case NA_ACTIVATE_MODE_OFF:
break;
default:
VERIFY(0);
/* NOTREACHED */
__builtin_unreachable();
}
/* nothing further to do for special ports */
if (vpna->vpna_nx_port < FSW_VP_USER_MIN) {
goto done;
}
/* activate any flow owner related resources (e.g. flowadv), if any */
fo_cnt = flow_owner_activate_nexus_port(fm, vpna->vpna_pid_bound,
vpna->vpna_pid, vpna->vpna_nx_port, &vpna->vpna_up, mode);
done:
SK_DF(SK_VERB_FSW,
"fsw 0x%llx %s nx_port %d vpna_pid %d vpna_pid_bound %u fo_cnt %u",
SK_KVA(fsw), na_activate_mode2str(mode), (int)vpna->vpna_nx_port,
vpna->vpna_pid, vpna->vpna_pid_bound, fo_cnt);
return 0;
}
int
fsw_port_na_defunct(struct nx_flowswitch *fsw, struct nexus_vp_adapter *vpna)
{
int err = 0;
SK_LOCK_ASSERT_HELD();
ASSERT(vpna->vpna_nx_port >= FSW_VP_USER_MIN);
/*
* During defunct, we want to purge all flows associated to this
* port and the flow owner as well. This is accomplished as part
* of calling the port's destructor. However, we still want to
* occupy the nexus port since there's a channel open to it.
*/
FSW_WLOCK(fsw);
if (!vpna->vpna_defunct) {
fsw_port_free(fsw, vpna, vpna->vpna_nx_port, TRUE);
} else {
err = EALREADY;
}
FSW_WUNLOCK(fsw);
return err;
}
static size_t
fsw_mib_get_flow(struct nx_flowswitch *fsw,
struct nexus_mib_filter *filter, void *out, size_t len)
{
struct flow_mgr *fm = fsw->fsw_flow_mgr;
size_t sf_size = sizeof(struct sk_stats_flow);
__block size_t actual_space = 0;
__block struct sk_stats_flow *sf = out;
struct flow_entry *fe;
FSW_LOCK_ASSERT_HELD(fsw);
if (filter->nmf_bitmap & NXMIB_FILTER_FLOW_ID) {
fe = flow_mgr_get_fe_by_uuid_rlock(fm, filter->nmf_flow_id);
if (fe != NULL) {
if (out != NULL && len >= sf_size) {
flow_entry_stats_get(fe, sf);
}
flow_entry_release(&fe);
return sf_size;
}
return 0;
} else if (filter->nmf_bitmap & NXMIB_FILTER_INFO_TUPLE) {
struct info_tuple *itpl = &filter->nmf_info_tuple;
struct flow_key fk;
bzero(&fk, sizeof(fk));
if (itpl->itpl_local_sa.sa_family == AF_INET &&
itpl->itpl_remote_sa.sa_family == AF_INET) {
fk.fk_mask = FKMASK_5TUPLE;
fk.fk_ipver = IPVERSION;
fk.fk_proto = itpl->itpl_proto;
fk.fk_src4 = itpl->itpl_local_sin.sin_addr;
fk.fk_dst4 = itpl->itpl_remote_sin.sin_addr;
fk.fk_sport = itpl->itpl_local_sin.sin_port;
fk.fk_dport = itpl->itpl_remote_sin.sin_port;
} else if (itpl->itpl_local_sa.sa_family == AF_INET6 &&
itpl->itpl_remote_sa.sa_family == AF_INET6) {
fk.fk_mask = FKMASK_5TUPLE;
fk.fk_ipver = IPV6_VERSION;
fk.fk_proto = itpl->itpl_proto;
fk.fk_src6 = itpl->itpl_local_sin6.sin6_addr;
fk.fk_dst6 = itpl->itpl_remote_sin6.sin6_addr;
fk.fk_sport = itpl->itpl_local_sin6.sin6_port;
fk.fk_dport = itpl->itpl_remote_sin6.sin6_port;
} else {
SK_ERR("invalid info tuple: local af %d remote af %d",
itpl->itpl_local_sa.sa_family,
itpl->itpl_remote_sa.sa_family);
return 0;
}
fe = flow_mgr_find_fe_by_key(fsw->fsw_flow_mgr, &fk);
if (fe != NULL) {
if (out != NULL && len >= sf_size) {
flow_entry_stats_get(fe, sf);
}
flow_entry_release(&fe);
return sf_size;
}
return 0;
}
flow_mgr_foreach_flow(fsw->fsw_flow_mgr, ^(struct flow_entry *_fe) {
actual_space += sf_size;
if (out == NULL || actual_space > len) {
return;
}
flow_entry_stats_get(_fe, sf);
sf++;
});
/*
* Also return the ones in deferred free list.
*/
lck_mtx_lock(&fsw->fsw_linger_lock);
TAILQ_FOREACH(fe, &fsw->fsw_linger_head, fe_linger_link) {
actual_space += sf_size;
if (out == NULL || actual_space > len) {
continue;
}
flow_entry_stats_get(fe, sf);
sf++;
}
lck_mtx_unlock(&fsw->fsw_linger_lock);
return actual_space;
}
static size_t
fsw_mib_get_flow_adv(struct nx_flowswitch *fsw,
struct nexus_mib_filter *filter, void *out, size_t len)
{
#pragma unused(filter)
uint32_t fae_idx;
size_t actual_space = 0;
struct kern_channel *ch = NULL;
struct sk_stats_flow_adv *sfa = NULL;
struct sk_stats_flow_adv_ent *sfae = NULL;
struct __flowadv_entry *fae = NULL;
size_t sfa_size = sizeof(struct sk_stats_flow_adv);
size_t sfae_size = sizeof(struct sk_stats_flow_adv_ent);
uint32_t max_flowadv =
fsw->fsw_nx->nx_prov->nxprov_params->nxp_flowadv_max;
SK_LOCK_ASSERT_HELD();
sfa = out;
/* copyout flow advisory table (allocated entries only) */
STAILQ_FOREACH(ch, &fsw->fsw_nx->nx_ch_head, ch_link) {
struct skmem_arena *ar;
struct skmem_arena_nexus *arn;
struct nexus_adapter *na;
/* ch_lock isn't needed here since sk_lock is held */
if ((ch->ch_flags & CHANF_CLOSING) ||
(na = ch->ch_na) == NULL) {
/* channel is closing */
continue;
}
ar = na->na_arena;
arn = skmem_arena_nexus(ar);
AR_LOCK(ar);
if (arn->arn_flowadv_obj == NULL) {
ASSERT(ar->ar_flags & ARF_DEFUNCT);
AR_UNLOCK(ar);
continue;
}
actual_space += sfa_size;
/* fill out flowadv_table info */
if (out != NULL && actual_space <= len) {
uuid_copy(sfa->sfa_nx_uuid, fsw->fsw_nx->nx_uuid);
(void) strlcpy(sfa->sfa_if_name,
fsw->fsw_flow_mgr->fm_name, IFNAMSIZ);
sfa->sfa_owner_pid = ch->ch_pid;
sfa->sfa_entries_count = 0;
}
/* fill out flowadv_entries */
sfae = &sfa->sfa_entries[0];
for (fae_idx = 0; fae_idx < max_flowadv; fae_idx++) {
fae = &arn->arn_flowadv_obj[fae_idx];
if (!uuid_is_null(fae->fae_id)) {
actual_space += sfae_size;
if (out == NULL || actual_space > len) {
continue;
}
/* fill out entry */
uuid_copy(sfae->sfae_flow_id, fae->fae_id);
sfae->sfae_flags = fae->fae_flags;
sfae++;
sfa->sfa_entries_count++;
}
}
sfa = (struct sk_stats_flow_adv *)
((uintptr_t)out + actual_space);
AR_UNLOCK(ar);
}
return actual_space;
}
static inline void
fsw_fo2sfo(struct nx_flowswitch *fsw, struct flow_owner *fo,
struct sk_stats_flow_owner *sfo)
{
struct flow_mgr *fm = fsw->fsw_flow_mgr;
uuid_copy(sfo->sfo_nx_uuid, fsw->fsw_nx->nx_uuid);
(void) strlcpy(sfo->sfo_if_name, fsw->fsw_flow_mgr->fm_name,
IFNAMSIZ);
sfo->sfo_bucket_idx = flow_mgr_get_fob_idx(fm, FO_BUCKET(fo));
(void) snprintf(sfo->sfo_name, sizeof(sfo->sfo_name), "%s",
fo->fo_name);
sfo->sfo_pid = fo->fo_pid;
sfo->sfo_nx_port = fo->fo_nx_port;
sfo->sfo_nx_port_pid_bound = fo->fo_nx_port_pid_bound;
sfo->sfo_nx_port_destroyed = fo->fo_nx_port_destroyed;
}
static size_t
fsw_mib_get_flow_owner(struct nx_flowswitch *fsw,
struct nexus_mib_filter *filter, void *out, size_t len)
{
#pragma unused(filter)
uint32_t i;
size_t actual_space = 0;
struct flow_mgr *fm = fsw->fsw_flow_mgr;
struct sk_stats_flow_owner *sfo = out;
size_t sfo_size = sizeof(struct sk_stats_flow_owner);
struct flow_owner *fo;
FSW_LOCK_ASSERT_HELD(fsw);
/*
* Ideally we'd like to hide the bucket level details from flow library
* user, but there is no simple way to iterate flow_owner with
* buckets/RB_TREE nested. So keep it as is.
*/
for (i = 0; i < fm->fm_owner_buckets_cnt; i++) {
struct flow_owner_bucket *fob = flow_mgr_get_fob_at_idx(fm, i);
FOB_LOCK(fob);
RB_FOREACH(fo, flow_owner_tree, &fob->fob_owner_head) {
actual_space += sfo_size;
if (out == NULL || actual_space > len) {
continue;
}
fsw_fo2sfo(fsw, fo, sfo);
sfo++;
}
FOB_UNLOCK(fob);
}
return actual_space;
}
static inline void
fsw_fr2sfr(struct nx_flowswitch *fsw, struct flow_route *fr,
struct sk_stats_flow_route *sfr, boolean_t ll_scrub)
{
uuid_copy(sfr->sfr_nx_uuid, fsw->fsw_nx->nx_uuid);
uuid_copy(sfr->sfr_uuid, fr->fr_uuid);
(void) strlcpy(sfr->sfr_if_name, fsw->fsw_flow_mgr->fm_name,
IFNAMSIZ);
sfr->sfr_bucket_idx = fr->fr_frb->frb_idx;
sfr->sfr_id_bucket_idx = fr->fr_frib->frib_idx;
if (fr->fr_flags & FLOWRTF_ATTACHED) {
sfr->sfr_flags |= SFLOWRTF_ATTACHED;
}
if (fr->fr_flags & FLOWRTF_ONLINK) {
sfr->sfr_flags |= SFLOWRTF_ONLINK;
}
if (fr->fr_flags & FLOWRTF_GATEWAY) {
sfr->sfr_flags |= SFLOWRTF_GATEWAY;
}
if (fr->fr_flags & FLOWRTF_RESOLVED) {
sfr->sfr_flags |= SFLOWRTF_RESOLVED;
}
if (fr->fr_flags & FLOWRTF_HAS_LLINFO) {
sfr->sfr_flags |= SFLOWRTF_HAS_LLINFO;
}
if (fr->fr_flags & FLOWRTF_DELETED) {
sfr->sfr_flags |= SFLOWRTF_DELETED;
}
if (fr->fr_flags & FLOWRTF_DST_LL_MCAST) {
sfr->sfr_flags |= SFLOWRTF_DST_LL_MCAST;
}
if (fr->fr_flags & FLOWRTF_DST_LL_BCAST) {
sfr->sfr_flags |= SFLOWRTF_DST_LL_BCAST;
}
lck_spin_lock(&fr->fr_reflock);
ASSERT(fr->fr_usecnt >= FLOW_ROUTE_MINREF);
sfr->sfr_usecnt = fr->fr_usecnt - FLOW_ROUTE_MINREF;
if (fr->fr_expire != 0) {
sfr->sfr_expire = (int64_t)(fr->fr_expire - net_uptime());
} else {
sfr->sfr_expire = 0;
}
lck_spin_unlock(&fr->fr_reflock);
sfr->sfr_laddr = fr->fr_laddr;
sfr->sfr_faddr = fr->fr_faddr;
sfr->sfr_gaddr = fr->fr_gaddr;
if (ll_scrub) {
static const uint8_t unspec[ETHER_ADDR_LEN] = {[0] = 2 };
bcopy(&unspec, &sfr->sfr_ether_dhost, ETHER_ADDR_LEN);
} else {
bcopy(&fr->fr_eth.ether_dhost, &sfr->sfr_ether_dhost,
ETHER_ADDR_LEN);
}
}
#if CONFIG_MACF
extern int dlil_lladdr_ckreq;
#endif /* CONFIG_MACF */
static size_t
fsw_mib_get_flow_route(struct nx_flowswitch *fsw,
struct nexus_mib_filter *filter, void *out, size_t len, struct proc *p)
{
#pragma unused(filter)
uint32_t i;
size_t actual_space = 0;
struct flow_mgr *fm = fsw->fsw_flow_mgr;
struct sk_stats_flow_route *sfr = out;
size_t sfo_size = sizeof(struct sk_stats_flow_route);
struct flow_route *fr;
boolean_t ll_scrub;
FSW_LOCK_ASSERT_HELD(fsw);
/*
* To get the link-layer info, the caller must have the following
* in their sandbox profile (or not be sandboxed at all), else we
* scrub it clean just like dlil_ifaddr_bytes() does:
*
* (allow system-info (info-type "net.link.addr"))
*
* If scrubbed, we return 02:00:00:00:00:00.
*/
#if CONFIG_MACF
ll_scrub = (dlil_lladdr_ckreq &&
skywalk_mac_system_check_proc_cred(p, "net.link.addr") != 0);
#else /* !CONFIG_MACF */
ll_scrub = FALSE;
#endif /* !CONFIG_MACF */
for (i = 0; i < fm->fm_route_buckets_cnt; i++) {
struct flow_route_bucket *frb = flow_mgr_get_frb_at_idx(fm, i);
FRB_RLOCK(frb);
RB_FOREACH(fr, flow_route_tree, &frb->frb_head) {
actual_space += sfo_size;
if (out == NULL || actual_space > len) {
continue;
}
fsw_fr2sfr(fsw, fr, sfr, ll_scrub);
sfr++;
}
FRB_UNLOCK(frb);
}
return actual_space;
}
static inline void
fsw_nxs2nus(struct nx_flowswitch *fsw, struct nexus_mib_filter *filter,
pid_t pid, struct __nx_stats_fsw *nxs, struct sk_stats_userstack *sus)
{
uuid_copy(sus->sus_nx_uuid, fsw->fsw_nx->nx_uuid);
(void) strlcpy(sus->sus_if_name, fsw->fsw_flow_mgr->fm_name,
IFNAMSIZ);
sus->sus_owner_pid = pid;
if (filter->nmf_type & NXMIB_IP_STATS) {
sus->sus_ip = nxs->nxs_ipstat;
}
if (filter->nmf_type & NXMIB_IP6_STATS) {
sus->sus_ip6 = nxs->nxs_ip6stat;
}
if (filter->nmf_type & NXMIB_TCP_STATS) {
sus->sus_tcp = nxs->nxs_tcpstat;
}
if (filter->nmf_type & NXMIB_UDP_STATS) {
sus->sus_udp = nxs->nxs_udpstat;
}
if (filter->nmf_type & NXMIB_QUIC_STATS) {
sus->sus_quic = nxs->nxs_quicstat;
}
}
static size_t
fsw_mib_get_userstack_stats(struct nx_flowswitch *fsw,
struct nexus_mib_filter *filter, void *out, size_t len)
{
size_t actual_space = 0;
struct kern_channel *ch;
struct __nx_stats_fsw *nxs;
struct sk_stats_userstack *sus = out;
size_t sus_size = sizeof(struct sk_stats_userstack);
SK_LOCK_ASSERT_HELD();
/* copyout saved stats from closed ports */
if (((filter->nmf_bitmap & NXMIB_FILTER_PID) &&
(filter->nmf_pid == 0)) ||
!(filter->nmf_bitmap & NXMIB_FILTER_PID)) {
actual_space += sus_size;
if (out != NULL && actual_space <= len) {
nxs = fsw->fsw_closed_na_stats;
fsw_nxs2nus(fsw, filter, 0, nxs, sus);
sus++;
}
}
/*
* XXX Currently a proc only opens one channel to nexus so we don't do
* per proc aggregation of inet stats now as this needs lots of code
*/
/* copyout per process stats */
STAILQ_FOREACH(ch, &fsw->fsw_nx->nx_ch_head, ch_link) {
struct skmem_arena *ar;
struct nexus_adapter *na;
/* ch_lock isn't needed here since sk_lock is held */
if ((ch->ch_flags & CHANF_CLOSING) ||
(na = ch->ch_na) == NULL) {
/* channel is closing */
continue;
}
if ((filter->nmf_bitmap & NXMIB_FILTER_PID) &&
filter->nmf_pid != ch->ch_pid) {
continue;
}
ar = na->na_arena;
AR_LOCK(ar);
nxs = skmem_arena_nexus(ar)->arn_stats_obj;
if (nxs == NULL) {
ASSERT(ar->ar_flags & ARF_DEFUNCT);
AR_UNLOCK(ar);
continue;
}
actual_space += sus_size;
if (out == NULL || actual_space > len) {
AR_UNLOCK(ar);
continue;
}
fsw_nxs2nus(fsw, filter, ch->ch_pid, nxs, sus);
sus++;
AR_UNLOCK(ar);
}
return actual_space;
}
static size_t
fsw_mib_get_stats(struct nx_flowswitch *fsw, void *out, size_t len)
{
struct sk_stats_flow_switch *sfs = out;
size_t actual_space = sizeof(struct sk_stats_flow_switch);
if (out != NULL && actual_space <= len) {
uuid_copy(sfs->sfs_nx_uuid, fsw->fsw_nx->nx_uuid);
(void) strlcpy(sfs->sfs_if_name,
fsw->fsw_flow_mgr->fm_name, IFNAMSIZ);
sfs->sfs_fsws = fsw->fsw_stats;
}
return actual_space;
}
size_t
fsw_mib_get(struct nx_flowswitch *fsw, struct nexus_mib_filter *filter,
void *out, size_t len, struct proc *p)
{
size_t ret;
switch (filter->nmf_type) {
case NXMIB_FSW_STATS:
ret = fsw_mib_get_stats(fsw, out, len);
break;
case NXMIB_FLOW:
ret = fsw_mib_get_flow(fsw, filter, out, len);
break;
case NXMIB_FLOW_OWNER:
ret = fsw_mib_get_flow_owner(fsw, filter, out, len);
break;
case NXMIB_FLOW_ROUTE:
ret = fsw_mib_get_flow_route(fsw, filter, out, len, p);
break;
case NXMIB_TCP_STATS:
case NXMIB_UDP_STATS:
case NXMIB_IP_STATS:
case NXMIB_IP6_STATS:
case NXMIB_USERSTACK_STATS:
ret = fsw_mib_get_userstack_stats(fsw, filter, out, len);
break;
case NXMIB_FLOW_ADV:
ret = fsw_mib_get_flow_adv(fsw, filter, out, len);
break;
default:
ret = 0;
break;
}
return ret;
}
void
fsw_fold_stats(struct nx_flowswitch *fsw,
void *data, nexus_stats_type_t type)
{
ASSERT(data != NULL);
FSW_LOCK_ASSERT_HELD(fsw);
switch (type) {
case NEXUS_STATS_TYPE_FSW:
{
struct __nx_stats_fsw *d, *s;
d = fsw->fsw_closed_na_stats;
s = data;
ip_stats_fold(&d->nxs_ipstat, &s->nxs_ipstat);
ip6_stats_fold(&d->nxs_ip6stat, &s->nxs_ip6stat);
tcp_stats_fold(&d->nxs_tcpstat, &s->nxs_tcpstat);
udp_stats_fold(&d->nxs_udpstat, &s->nxs_udpstat);
quic_stats_fold(&d->nxs_quicstat, &s->nxs_quicstat);
break;
}
case NEXUS_STATS_TYPE_CHAN_ERRORS:
{
struct __nx_stats_channel_errors *s = data;
fsw_vp_channel_error_stats_fold(&fsw->fsw_stats, s);
break;
}
default:
VERIFY(0);
/* NOTREACHED */
__builtin_unreachable();
}
}
boolean_t
fsw_detach_barrier_add(struct nx_flowswitch *fsw)
{
lck_mtx_lock_spin(&fsw->fsw_detach_barrier_lock);
if (__improbable(fsw->fsw_detach_flags != 0 ||
fsw->fsw_ifp == NULL || fsw->fsw_agent_session == NULL)) {
lck_mtx_unlock(&fsw->fsw_detach_barrier_lock);
return FALSE;
}
fsw->fsw_detach_barriers++;
lck_mtx_unlock(&fsw->fsw_detach_barrier_lock);
return TRUE;
}
void
fsw_detach_barrier_remove(struct nx_flowswitch *fsw)
{
lck_mtx_lock_spin(&fsw->fsw_detach_barrier_lock);
ASSERT((fsw->fsw_detach_flags & FSW_DETACHF_DETACHED) == 0);
ASSERT(fsw->fsw_detach_barriers != 0);
fsw->fsw_detach_barriers--;
/* if there's a thread waiting to detach the interface, let it know */
if (__improbable((fsw->fsw_detach_waiters > 0) &&
(fsw->fsw_detach_barriers == 0))) {
fsw->fsw_detach_waiters = 0;
wakeup(&fsw->fsw_detach_waiters);
}
lck_mtx_unlock(&fsw->fsw_detach_barrier_lock);
}
/*
* Generic resolver for non-Ethernet interfaces.
*/
int
fsw_generic_resolve(struct nx_flowswitch *fsw, struct flow_route *fr,
struct __kern_packet *pkt)
{
#pragma unused(pkt)
#if SK_LOG
char dst_s[MAX_IPv6_STR_LEN];
#endif /* SK_LOG */
struct ifnet *ifp = fsw->fsw_ifp;
struct rtentry *tgt_rt = NULL;
int err = 0;
ASSERT(fr != NULL);
ASSERT(ifp != NULL);
FR_LOCK(fr);
/*
* If the destination is on-link, we use the final destination
* address as target. If it's off-link, we use the gateway
* address instead. Point tgt_rt to the the destination or
* gateway route accordingly.
*/
if (fr->fr_flags & FLOWRTF_ONLINK) {
tgt_rt = fr->fr_rt_dst;
} else if (fr->fr_flags & FLOWRTF_GATEWAY) {
tgt_rt = fr->fr_rt_gw;
}
/*
* Perform another routing table lookup if necessary.
*/
if (tgt_rt == NULL || !(tgt_rt->rt_flags & RTF_UP) ||
fr->fr_want_configure) {
if (fr->fr_want_configure == 0) {
os_atomic_inc(&fr->fr_want_configure, relaxed);
}
err = flow_route_configure(fr, ifp, NULL);
if (err != 0) {
SK_ERR("failed to configure route to %s on %s (err %d)",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s,
sizeof(dst_s)), ifp->if_xname, err);
goto done;
}
/* refresh pointers */
if (fr->fr_flags & FLOWRTF_ONLINK) {
tgt_rt = fr->fr_rt_dst;
} else if (fr->fr_flags & FLOWRTF_GATEWAY) {
tgt_rt = fr->fr_rt_gw;
}
}
if (__improbable(!(fr->fr_flags & (FLOWRTF_ONLINK | FLOWRTF_GATEWAY)))) {
err = EHOSTUNREACH;
SK_ERR("invalid route for %s on %s (err %d)",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s,
sizeof(dst_s)), ifp->if_xname, err);
goto done;
}
ASSERT(tgt_rt != NULL);
done:
if (__probable(err == 0)) {
/*
* There's no actual resolution taking place here, so just
* mark it with FLOWRTF_RESOLVED for consistency.
*/
os_atomic_or(&fr->fr_flags, FLOWRTF_RESOLVED, relaxed);
os_atomic_store(&fr->fr_want_probe, 0, release);
} else {
os_atomic_andnot(&fr->fr_flags, FLOWRTF_RESOLVED, relaxed);
flow_route_cleanup(fr);
}
FR_UNLOCK(fr);
return err;
}
static void
fsw_read_boot_args(void)
{
(void) PE_parse_boot_argn("fsw_use_dual_sized_pool",
&fsw_use_dual_sized_pool, sizeof(fsw_use_dual_sized_pool));
}
void
fsw_init(void)
{
_CASSERT(NX_FSW_CHUNK_FREE == (uint64_t)-1);
_CASSERT(PKT_MAX_PROTO_HEADER_SIZE <= NX_FSW_MINBUFSIZE);
if (!__nx_fsw_inited) {
fsw_read_boot_args();
/*
* Register callbacks for interface & protocol events
* Use dummy arg for callback cookie.
*/
__nx_fsw_ifnet_eventhandler_tag =
EVENTHANDLER_REGISTER(&ifnet_evhdlr_ctxt,
ifnet_event, fsw_ifnet_event_callback,
eventhandler_entry_dummy_arg, EVENTHANDLER_PRI_ANY);
VERIFY(__nx_fsw_ifnet_eventhandler_tag != NULL);
__nx_fsw_protoctl_eventhandler_tag =
EVENTHANDLER_REGISTER(&protoctl_evhdlr_ctxt,
protoctl_event, fsw_protoctl_event_callback,
eventhandler_entry_dummy_arg, EVENTHANDLER_PRI_ANY);
VERIFY(__nx_fsw_protoctl_eventhandler_tag != NULL);
__nx_fsw_inited = 1;
}
}
void
fsw_uninit(void)
{
if (__nx_fsw_inited) {
EVENTHANDLER_DEREGISTER(&ifnet_evhdlr_ctxt, ifnet_event,
__nx_fsw_ifnet_eventhandler_tag);
EVENTHANDLER_DEREGISTER(&protoctl_evhdlr_ctxt, protoctl_event,
__nx_fsw_protoctl_eventhandler_tag);
__nx_fsw_inited = 0;
}
}
struct nx_flowswitch *
fsw_alloc(zalloc_flags_t how)
{
struct nx_flowswitch *fsw;
struct __nx_stats_fsw *nsfw;
SK_LOCK_ASSERT_HELD();
nsfw = zalloc_flags(nx_fsw_stats_zone, how | Z_ZERO);
if (nsfw == NULL) {
return NULL;
}
fsw = zalloc_flags(nx_fsw_zone, how | Z_ZERO);
if (fsw == NULL) {
zfree(nx_fsw_stats_zone, nsfw);
return NULL;
}
FSW_RWINIT(fsw);
fsw->fsw_dev_ch = NULL;
fsw->fsw_host_ch = NULL;
fsw->fsw_closed_na_stats = nsfw;
SK_DF(SK_VERB_MEM, "fsw 0x%llx ALLOC", SK_KVA(fsw));
return fsw;
}
static int
fsw_detach(struct nx_flowswitch *fsw, struct nexus_adapter *hwna,
boolean_t purge)
{
struct kern_nexus_provider *nx_prov = fsw->fsw_nx->nx_prov;
boolean_t do_dtor = FALSE;
SK_LOCK_ASSERT_HELD();
/*
* return error if the the host port detach is in progress
* or already detached.
* For the case of flowswitch free (i.e. purge is TRUE) we have to
* cleanup everything, so we will block if needed.
*/
lck_mtx_lock(&fsw->fsw_detach_barrier_lock);
if (!purge && fsw->fsw_detach_flags != 0) {
SK_ERR("fsw detaching");
lck_mtx_unlock(&fsw->fsw_detach_barrier_lock);
return EBUSY;
}
VERIFY(purge || fsw->fsw_detach_flags == 0);
/*
* mark the flowswitch as detaching and release sk_lock while
* waiting for other threads to exit. Maintain lock/unlock
* ordering between the two locks.
*/
fsw->fsw_detach_flags |= FSW_DETACHF_DETACHING;
lck_mtx_unlock(&fsw->fsw_detach_barrier_lock);
SK_UNLOCK();
/*
* wait until all threads needing accesses to the flowswitch
* netagent get out, and mark this as detached to prevent
* further access requests from being admitted.
*/
lck_mtx_lock(&fsw->fsw_detach_barrier_lock);
while (fsw->fsw_detach_barriers != 0) {
fsw->fsw_detach_waiters++;
(void) msleep(&fsw->fsw_detach_waiters,
&fsw->fsw_detach_barrier_lock,
(PZERO + 1), __FUNCTION__, NULL);
}
VERIFY(fsw->fsw_detach_barriers == 0);
VERIFY(fsw->fsw_detach_flags != 0);
fsw->fsw_detach_flags &= ~FSW_DETACHF_DETACHING;
/*
* if the NA detach thread as well as the flowswitch free thread were
* both waiting, then the thread which wins the race is responsible
* for doing the dtor work.
*/
if (fsw->fsw_detach_flags == 0) {
fsw->fsw_detach_flags |= FSW_DETACHF_DETACHED;
do_dtor = TRUE;
}
VERIFY(fsw->fsw_detach_flags == FSW_DETACHF_DETACHED);
lck_mtx_unlock(&fsw->fsw_detach_barrier_lock);
SK_LOCK();
FSW_WLOCK(fsw);
if (do_dtor) {
if (fsw->fsw_ifp != NULL) {
fsw_teardown_ifp(fsw, hwna);
ASSERT(fsw->fsw_ifp == NULL);
ASSERT(fsw->fsw_nifna == NULL);
}
bzero(fsw->fsw_slla, sizeof(fsw->fsw_slla));
nx_prov->nxprov_params->nxp_ifindex = 0;
/* free any flow entries in the deferred list */
fsw_linger_purge(fsw);
}
/*
* If we are destroying the instance, release lock to let all
* outstanding agent threads to enter, followed by waiting until
* all of them exit the critical section before continuing.
*/
if (purge) {
FSW_UNLOCK(fsw);
flow_mgr_terminate(fsw->fsw_flow_mgr);
FSW_WLOCK(fsw);
}
FSW_WUNLOCK(fsw);
return 0;
}
void
fsw_free(struct nx_flowswitch *fsw)
{
int err;
SK_LOCK_ASSERT_HELD();
ASSERT(fsw != NULL);
err = fsw_detach(fsw, NULL, TRUE);
VERIFY(err == 0);
fsw_dp_dtor(fsw);
ASSERT(fsw->fsw_dev_ch == NULL);
ASSERT(fsw->fsw_host_ch == NULL);
ASSERT(fsw->fsw_closed_na_stats != NULL);
zfree(nx_fsw_stats_zone, fsw->fsw_closed_na_stats);
fsw->fsw_closed_na_stats = NULL;
FSW_RWDESTROY(fsw);
SK_DF(SK_VERB_MEM, "fsw 0x%llx FREE", SK_KVA(fsw));
zfree(nx_fsw_zone, fsw);
}
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