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5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242 | /* * 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. */ /* * BSD LICENSE * * Copyright(c) 2015 NEC Europe Ltd. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 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. * * Neither the name of NEC Europe Ltd. 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 COPYRIGHT HOLDERS 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 COPYRIGHT * OWNER 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 <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 <kern/sched_prim.h> #include <kern/uipc_domain.h> #include <sys/kdebug.h> #include <sys/sdt.h> #include <net/bpf.h> #include <net/if_ports_used.h> #include <net/pktap.h> #include <net/droptap.h> #include <net/pktsched/pktsched_netem.h> #include <netinet/tcp.h> #include <netinet/udp.h> #include <netinet/ip.h> #include <netinet/ip6.h> #include <netinet/in_var.h> extern kern_return_t thread_terminate(thread_t); #define FSW_ZONE_MAX 256 #define FSW_ZONE_NAME "skywalk.nx.fsw" static uint64_t fsw_reap_last __sk_aligned(8); static uint64_t fsw_want_purge __sk_aligned(8); #define NX_FSW_FE_TABLESZ 256 /* some power of 2 */ static uint32_t fsw_fe_table_size = NX_FSW_FE_TABLESZ; #define NX_FSW_FOB_HASHSZ 31 /* some mersenne prime */ static uint32_t fsw_flow_owner_buckets = NX_FSW_FOB_HASHSZ; #define NX_FSW_FRB_HASHSZ 128 /* some power of 2 */ static uint32_t fsw_flow_route_buckets = NX_FSW_FRB_HASHSZ; #define NX_FSW_FRIB_HASHSZ 13 /* some mersenne prime */ static uint32_t fsw_flow_route_id_buckets = NX_FSW_FRIB_HASHSZ; #define NX_FSW_FLOW_REAP_INTERVAL 1 /* seconds */ static uint32_t fsw_flow_reap_interval = NX_FSW_FLOW_REAP_INTERVAL; #define NX_FSW_RX_STALL_THRES 0 /* seconds (0 = disable) */ static uint32_t fsw_rx_stall_thresh = NX_FSW_RX_STALL_THRES; #define NX_FSW_RX_STALL_DEFUNCT 1 /* defunct Rx-stalled channel (0 = disable) */ static uint32_t fsw_rx_stall_defunct = NX_FSW_RX_STALL_DEFUNCT; #define NX_FSW_FLOW_PURGE_THRES 0 /* purge every N reaps (0 = disable) */ static uint32_t fsw_flow_purge_thresh = NX_FSW_FLOW_PURGE_THRES; #define FSW_REAP_IVAL (MAX(1, fsw_flow_reap_interval)) #define FSW_REAP_SK_THRES (FSW_REAP_IVAL << 5) #define FSW_REAP_IF_THRES (FSW_REAP_IVAL << 5) #define FSW_DRAIN_CH_THRES (FSW_REAP_IVAL << 5) #define FSW_IFSTATS_THRES 1 #define NX_FSW_CHANNEL_REAP_THRES 1000 /* threshold (bytes/sec) for reaping*/ uint64_t fsw_channel_reap_thresh = NX_FSW_CHANNEL_REAP_THRES; #define RX_BUFLET_BATCH_COUNT 64 /* max batch size for buflet allocation */ uint32_t fsw_rx_batch = NX_FSW_RXBATCH; /* # of packets per batch (RX) */ uint32_t fsw_tx_batch = NX_FSW_TXBATCH; /* # of packets per batch (TX) */ uint32_t fsw_gso_batch = 8; #if (DEVELOPMENT || DEBUG) SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, rx_batch, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_rx_batch, 0, "flowswitch Rx batch size"); SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, tx_batch, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_tx_batch, 0, "flowswitch Tx batch size"); SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, gso_batch, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_gso_batch, 0, "flowswitch GSO batch size"); SYSCTL_QUAD(_kern_skywalk_flowswitch, OID_AUTO, reap_throughput, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_channel_reap_thresh, "flowswitch channel reap threshold throughput (bytes/sec)"); #endif /* !DEVELOPMENT && !DEBUG */ SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, rx_agg_tcp, CTLFLAG_RW | CTLFLAG_LOCKED, &sk_fsw_rx_agg_tcp, 0, "flowswitch RX aggregation for tcp flows (enable/disable)"); SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, rx_agg_tcp_host, CTLFLAG_RW | CTLFLAG_LOCKED, &sk_fsw_rx_agg_tcp_host, 0, "flowswitch RX aggregation for tcp kernel path (0/1/2 (off/on/auto))"); SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, gso_mtu, CTLFLAG_RW | CTLFLAG_LOCKED, &sk_fsw_gso_mtu, 0, "flowswitch GSO for tcp flows (mtu > 0: enable, mtu == 0: disable)"); /* * IP reassembly * The "kern.skywalk.flowswitch.ip_reass" sysctl can be used to force * enable/disable the reassembly routine regardless of whether the * transport netagent is enabled or not. * * 'fsw_ip_reass' is a tri-state: * 0 means force IP reassembly off * 1 means force IP reassembly on * 2 means don't force the value, use what's appropriate for this flowswitch */ #define FSW_IP_REASS_FORCE_OFF 0 #define FSW_IP_REASS_FORCE_ON 1 #define FSW_IP_REASS_AUTO 2 uint32_t fsw_ip_reass = FSW_IP_REASS_AUTO; static int fsw_ip_reass_sysctl SYSCTL_HANDLER_ARGS { #pragma unused(oidp, arg1, arg2) unsigned int new_value; int changed; int error; error = sysctl_io_number(req, fsw_ip_reass, sizeof(fsw_ip_reass), &new_value, &changed); if (error == 0 && changed != 0) { if (new_value > FSW_IP_REASS_AUTO) { return EINVAL; } fsw_ip_reass = new_value; } return error; } SYSCTL_PROC(_kern_skywalk_flowswitch, OID_AUTO, ip_reass, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, 0, 0, fsw_ip_reass_sysctl, "IU", "adjust flowswitch IP reassembly"); #if (DEVELOPMENT || DEBUG) static uint64_t _fsw_inject_error = 0; #define _FSW_INJECT_ERROR(_en, _ev, _ec, _f, ...) \ _SK_INJECT_ERROR(_fsw_inject_error, _en, _ev, _ec, \ &FSW_STATS_VAL(_FSW_STATS_ERROR_INJECTIONS), _f, __VA_ARGS__) #define _FSW_INJECT_ERROR_SET(_en, _f, ...) do { \ if (__improbable(((_fsw_inject_error) & (1ULL << (_en))) != 0)) { \ SK_DF(SK_VERB_ERROR_INJECT, "injecting error %d", (_en));\ if ((_f) != NULL) \ (_f)(__VA_ARGS__); \ } \ } while (0) SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, flow_owner_buckets, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_flow_owner_buckets, 0, ""); SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, fe_table_size, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_fe_table_size, 0, ""); SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, flow_route_buckets, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_flow_route_buckets, 0, ""); SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, flow_route_id_buckets, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_flow_route_id_buckets, 0, ""); SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, flow_reap_interval, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_flow_reap_interval, 0, ""); SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, rx_stall_thresh, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_rx_stall_thresh, 0, ""); SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, rx_stall_defunct, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_rx_stall_defunct, 0, ""); SYSCTL_UINT(_kern_skywalk_flowswitch, OID_AUTO, flow_purge_thresh, CTLFLAG_RW | CTLFLAG_LOCKED, &fsw_flow_purge_thresh, 0, ""); SYSCTL_QUAD(_kern_skywalk_flowswitch, OID_AUTO, fsw_inject_error, CTLFLAG_RW | CTLFLAG_LOCKED, &_fsw_inject_error, ""); #else #define _FSW_INJECT_ERROR(_en, _ev, _ec, _f, ...) do { } while (0) #define _FSW_INJECT_ERROR_SET(_en, _f, ...) do { } while (0) #endif /* !DEVELOPMENT && !DEBUG */ static void fsw_linger_remove_internal(struct flow_entry_linger_head *, struct flow_entry *); static void fsw_reap_thread_func(void *, wait_result_t); static void fsw_reap_thread_cont(void *, wait_result_t); static void fsw_purge_cache(struct nx_flowswitch *, boolean_t); static void fsw_drain_channels(struct nx_flowswitch *, uint64_t, boolean_t); static uint32_t fsw_process_deferred(struct nx_flowswitch *); static uint32_t fsw_process_linger(struct nx_flowswitch *, uint32_t *); static void fsw_process_rxstrc(struct nx_flowswitch *); static int copy_packet_from_dev(struct nx_flowswitch *, struct __kern_packet *, struct __kern_packet *); static void fsw_ifp_inc_traffic_class_in_pkt(struct ifnet *, kern_packet_t); static void fsw_ifp_inc_traffic_class_out_pkt(struct ifnet *, uint32_t, uint32_t, uint32_t); static int __fsw_dp_inited = 0; int fsw_dp_init(void) { static_assert(FSW_VP_DEV == 0); static_assert(FSW_VP_HOST == 1); static_assert((FSW_VP_HOST + FSW_VP_DEV) < FSW_VP_USER_MIN); static_assert((FSW_VP_HOST + FSW_VP_DEV) < NEXUS_PORT_FLOW_SWITCH_CLIENT); ASSERT(!__fsw_dp_inited); flow_mgr_init(); flow_init(); __fsw_dp_inited = 1; return 0; } void fsw_dp_uninit(void) { if (__fsw_dp_inited) { flow_fini(); flow_mgr_fini(); __fsw_dp_inited = 0; } } static void dp_free_pktq(struct nx_flowswitch *fsw __sk_unused, struct pktq *pktq) { pp_free_pktq(pktq); } #define dp_drop_pktq(fsw, pktq, outgoing, _reason, line, _flags) do { \ uint32_t _len = KPKTQ_LEN(pktq); \ if (KPKTQ_EMPTY(pktq)) { \ ASSERT(_len == 0); \ break; \ } \ SK_DF(SK_VERB_FSW_DP | SK_VERB_DROP, "drop %d packets", _len); \ FSW_STATS_ADD(FSW_STATS_DROP, _len); \ DTRACE_SKYWALK1(fsw__dp__drop, int, _len); \ if (__probable(droptap_total_tap_count == 0)) { \ dp_free_pktq(fsw, pktq); \ break; \ } \ drop_func_t dropfunc; \ dropfunc = (outgoing) ? droptap_output_packet : droptap_input_packet; \ struct __kern_packet *kpkt = KPKTQ_FIRST(pktq); \ struct __kern_packet *next_pkt; \ for (; kpkt != NULL; kpkt = next_pkt) { \ next_pkt = kpkt->pkt_nextpkt; \ dropfunc(SK_PKT2PH(kpkt), _reason, __func__, line, _flags, \ fsw->fsw_ifp, kpkt->pkt_qum.qum_pid, NULL, -1, NULL, \ 0, 0); \ } \ dp_free_pktq(fsw, pktq); \ } while (0) #define dp_drop_pkt_single_nofree(fsw, pkt, outgoing, _reason, _flags) do { \ SK_DF(SK_VERB_FSW_DP | SK_VERB_DROP, "drop 1 packet"); \ FSW_STATS_ADD(FSW_STATS_DROP, 1); \ if (__probable(droptap_total_tap_count == 0)) { \ break; \ } \ drop_func_t dropfunc; \ dropfunc = (outgoing) ? droptap_output_packet : droptap_input_packet; \ dropfunc(SK_PKT2PH(pkt), _reason, __func__, __LINE__, _flags, \ fsw->fsw_ifp, (pkt)->pkt_qum.qum_pid, NULL, -1, NULL, 0, 0); \ } while (0) #define dp_drop_pkt_single(fsw, pkt, outgoing, _reason, _flags) do { \ SK_DF(SK_VERB_FSW_DP | SK_VERB_DROP, "drop 1 packet"); \ FSW_STATS_ADD(FSW_STATS_DROP, 1); \ if (__probable(droptap_total_tap_count == 0)) { \ pp_free_packet_single(pkt); \ break; \ } \ drop_func_t dropfunc; \ dropfunc = (outgoing) ? droptap_output_packet : droptap_input_packet; \ dropfunc(SK_PKT2PH(pkt), _reason, __func__, __LINE__, _flags, \ fsw->fsw_ifp, (pkt)->pkt_qum.qum_pid, NULL, -1, NULL, 0, 0); \ pp_free_packet_single(pkt); \ } while (0) #define dp_drop_pkt_chain(pkt, outgoing, _reason, _flags) do { \ if (__probable(droptap_total_tap_count == 0)) { \ pp_free_packet_chain(pkt, NULL); \ break; \ } \ drop_func_t dropfunc; \ dropfunc = (outgoing) ? droptap_output_packet : droptap_input_packet; \ struct __kern_packet *next_pkt; \ for (; pkt != NULL; pkt = next_pkt) { \ next_pkt = pkt->pkt_nextpkt; \ dropfunc(SK_PKT2PH(pkt), _reason, __func__, __LINE__, _flags, \ NULL, pkt->pkt_qum.qum_pid, NULL, -1, NULL, \ 0, 0); \ } \ pp_free_packet_chain(pkt, NULL); \ } while (0) SK_NO_INLINE_ATTRIBUTE void fsw_snoop(struct nx_flowswitch *fsw, struct flow_entry *fe, struct pktq *pktq, bool input) { pid_t pid; char proc_name_buf[FLOW_PROCESS_NAME_LENGTH]; const char *__null_terminated proc_name = NULL; pid_t epid; char eproc_name_buf[FLOW_PROCESS_NAME_LENGTH]; const char *__null_terminated eproc_name = NULL; sa_family_t af; bool tap_early = false; struct __kern_packet *pkt; ASSERT(fe != NULL); ASSERT(fsw->fsw_ifp != NULL); if (fe->fe_nx_port == FSW_VP_HOST) { /* allow packets to be tapped before aggregation happens */ tap_early = (input && fe->fe_key.fk_proto == IPPROTO_TCP); if (!tap_early) { /* all other traffic will be tapped in the dlil input path */ return; } } if (fe->fe_key.fk_ipver == IPVERSION) { af = AF_INET; } else if (fe->fe_key.fk_ipver == IPV6_VERSION) { af = AF_INET6; } else { return; } pid = fe->fe_pid; if (fe->fe_proc_name[0] != '\0') { proc_name = strbufcpy(proc_name_buf, sizeof(proc_name_buf), fe->fe_proc_name, sizeof(fe->fe_proc_name)); } epid = fe->fe_epid; if (fe->fe_eproc_name[0] != '\0') { eproc_name = strbufcpy(eproc_name_buf, sizeof(eproc_name_buf), fe->fe_eproc_name, sizeof(fe->fe_eproc_name)); } if (input) { KPKTQ_FOREACH(pkt, pktq) { pktap_input_packet(fsw->fsw_ifp, af, fsw->fsw_ifp_dlt, pid, proc_name, epid, eproc_name, SK_PKT2PH(pkt), NULL, 0, IPPROTO_TCP, fe->fe_flowid, tap_early ? PTH_FLAG_SOCKET: PTH_FLAG_NEXUS_CHAN); } } else { KPKTQ_FOREACH(pkt, pktq) { pktap_output_packet(fsw->fsw_ifp, af, fsw->fsw_ifp_dlt, pid, proc_name, epid, eproc_name, SK_PKT2PH(pkt), NULL, 0, 0, 0, PTH_FLAG_NEXUS_CHAN); } } } #if (DEVELOPMENT || DEBUG) static void _fsw_error35_handler(int step, struct flow_route *fr, struct __kern_packet *pkt, int *ret) { static boolean_t _err35_flag_modified = FALSE; switch (step) { case 1: if ((fr->fr_flags & (FLOWRTF_RESOLVED | FLOWRTF_HAS_LLINFO)) == (FLOWRTF_RESOLVED | FLOWRTF_HAS_LLINFO)) { fr->fr_flags &= ~FLOWRTF_RESOLVED; _err35_flag_modified = TRUE; } break; case 2: if (!_err35_flag_modified) { return; } if (pkt->pkt_pflags & PKT_F_MBUF_DATA) { m_freem(pkt->pkt_mbuf); pkt->pkt_pflags &= ~PKT_F_MBUF_DATA; pkt->pkt_mbuf = NULL; } *ret = EJUSTRETURN; fr->fr_flags |= FLOWRTF_RESOLVED; _err35_flag_modified = FALSE; break; default: VERIFY(0); /* not reached */ } } static void _fsw_error36_handler(int step, struct flow_route *fr, int *ret) { static boolean_t _err36_flag_modified = FALSE; switch (step) { case 1: if ((fr->fr_flags & (FLOWRTF_RESOLVED | FLOWRTF_HAS_LLINFO)) == (FLOWRTF_RESOLVED | FLOWRTF_HAS_LLINFO)) { fr->fr_flags &= ~FLOWRTF_RESOLVED; _err36_flag_modified = TRUE; } break; case 2: if (!_err36_flag_modified) { return; } *ret = ENETUNREACH; fr->fr_flags |= FLOWRTF_RESOLVED; _err36_flag_modified = FALSE; break; default: VERIFY(0); /* not reached */ } } #else /* !DEVELOPMENT && !DEBUG */ #define _fsw_error35_handler(...) #define _fsw_error36_handler(...) #endif /* DEVELOPMENT || DEBUG */ /* * Check if the source packet content can fit into the destination * ring's packet. Returns TRUE if the source packet can fit. * Note: Failures could be caused by misconfigured packet pool sizes, * missing packet size check again MTU or if the source packet is from * a compat netif and the attached mbuf is larger than MTU due to LRO. */ static inline boolean_t validate_pkt_len(struct __kern_packet *spkt, kern_packet_t dph, uint32_t skip_l2hlen, uint32_t l2hlen, uint16_t headroom, uint32_t *copy_len) { uint32_t tlen = 0; uint32_t splen = spkt->pkt_length - skip_l2hlen; if (l2hlen != 0) { VERIFY(skip_l2hlen == 0); tlen += l2hlen; } else if ((spkt->pkt_link_flags & PKT_LINKF_ETHFCS) != 0) { splen -= ETHER_CRC_LEN; } tlen += splen; *copy_len = splen; return tlen <= ((__packet_get_buflet_count(dph) * PP_BUF_SIZE_DEF(SK_PTR_ADDR_KPKT(dph)->pkt_qum.qum_pp)) - headroom); } #if SK_LOG /* Hoisted out of line to reduce kernel stack footprint */ SK_LOG_ATTRIBUTE static void copy_packet_from_dev_log(struct __kern_packet *spkt, struct __kern_packet *dpkt, struct proc *p) { uint64_t logflags = ((SK_VERB_FSW | SK_VERB_RX) | ((spkt->pkt_pflags & PKT_F_MBUF_DATA) ? SK_VERB_COPY_MBUF : SK_VERB_COPY)); char *daddr; uint32_t pkt_len; MD_BUFLET_ADDR_ABS(dpkt, daddr); pkt_len = __packet_get_real_data_length(dpkt); SK_DF(logflags, "%s(%d) splen %u dplen %u hr %u l2 %u", sk_proc_name(p), sk_proc_pid(p), spkt->pkt_length, dpkt->pkt_length, (uint32_t)dpkt->pkt_headroom, (uint32_t)dpkt->pkt_l2_len); SK_DF(logflags | SK_VERB_DUMP, "%s", sk_dump("buf", daddr, pkt_len, 128)); } #else #define copy_packet_from_dev_log(...) #endif /* SK_LOG */ static inline int copy_packet_from_dev(struct nx_flowswitch *fsw, struct __kern_packet *spkt, struct __kern_packet *dpkt) { /* * source and destination nexus don't share the packet pool * sync operation here is to * - alloc packet for the rx(dst) ring * - copy data/metadata from src packet to dst packet * - attach alloc'd packet to rx(dst) ring */ kern_packet_t dph = SK_PTR_ENCODE(dpkt, METADATA_TYPE(dpkt), METADATA_SUBTYPE(dpkt)); kern_packet_t sph = SK_PTR_ENCODE(spkt, METADATA_TYPE(spkt), METADATA_SUBTYPE(spkt)); boolean_t do_cksum_rx; uint16_t skip_l2h_len = spkt->pkt_l2_len; uint16_t iphlen; uint32_t dlen; int err; if (__improbable(!validate_pkt_len(spkt, dph, skip_l2h_len, 0, 0, &dlen))) { SK_ERR("bufcnt %d, bufsz %d", __packet_get_buflet_count(dph), PP_BUF_SIZE_DEF(dpkt->pkt_qum.qum_pp)); FSW_STATS_INC(FSW_STATS_RX_COPY_BAD_LEN); return EINVAL; } /* Copy packet metadata */ _QUM_COPY(&(spkt)->pkt_qum, &(dpkt)->pkt_qum); _PKT_COPY(spkt, dpkt); ASSERT(!(dpkt->pkt_qum.qum_qflags & QUM_F_KERNEL_ONLY) || PP_KERNEL_ONLY(dpkt->pkt_qum.qum_pp)); ASSERT(dpkt->pkt_mbuf == NULL); dpkt->pkt_headroom = 0; dpkt->pkt_l2_len = 0; /* don't include IP header from partial sum */ if (__probable((spkt->pkt_qum_qflags & QUM_F_FLOW_CLASSIFIED) != 0)) { iphlen = spkt->pkt_flow_ip_hlen; do_cksum_rx = sk_cksum_rx; } else { iphlen = 0; do_cksum_rx = FALSE; } /* Copy packet payload */ if ((spkt->pkt_pflags & PKT_F_MBUF_DATA) && (spkt->pkt_pflags & PKT_F_TRUNCATED)) { FSW_STATS_INC(FSW_STATS_RX_COPY_MBUF2PKT); /* * Source packet has truncated contents (just enough for * the classifer) of an mbuf from the compat driver; copy * the entire entire mbuf contents to destination packet. */ m_adj(spkt->pkt_mbuf, skip_l2h_len); ASSERT((uint32_t)m_pktlen(spkt->pkt_mbuf) >= dlen); fsw->fsw_pkt_copy_from_mbuf(NR_RX, dph, 0, spkt->pkt_mbuf, 0, dlen, do_cksum_rx, iphlen); } else { FSW_STATS_INC(FSW_STATS_RX_COPY_PKT2PKT); /* * Source packet has full contents, either from an mbuf * that came up from the compat driver, or because it * originated on the native driver; copy to destination. */ fsw->fsw_pkt_copy_from_pkt(NR_RX, dph, 0, sph, (spkt->pkt_headroom + spkt->pkt_l2_len), dlen, do_cksum_rx, iphlen, 0, FALSE); } #if DEBUG || DEVELOPMENT if (__improbable(pkt_trailers > 0)) { dlen += pkt_add_trailers(dph, dlen, iphlen); } #endif /* DEBUG || DEVELOPMENT */ /* Finalize and attach packet to Rx ring */ METADATA_ADJUST_LEN(dpkt, 0, 0); err = __packet_finalize(dph); VERIFY(err == 0); copy_packet_from_dev_log(spkt, dpkt, kernproc); if (spkt->pkt_pflags & PKT_F_MBUF_DATA) { ifp_inc_traffic_class_in(fsw->fsw_ifp, spkt->pkt_mbuf); mbuf_freem(spkt->pkt_mbuf); KPKT_CLEAR_MBUF_DATA(spkt); } else { fsw_ifp_inc_traffic_class_in_pkt(fsw->fsw_ifp, dph); } if (__probable(do_cksum_rx != 0)) { FSW_STATS_INC(FSW_STATS_RX_COPY_SUM); } return 0; } SK_NO_INLINE_ATTRIBUTE static struct __kern_packet * rx_process_ip_frag(struct nx_flowswitch *fsw, struct __kern_packet *pkt) { char *pkt_buf; void *l3_hdr; uint16_t nfrags, tlen; int err = 0; switch (fsw_ip_reass) { case FSW_IP_REASS_FORCE_OFF: return pkt; case FSW_IP_REASS_FORCE_ON: break; default: if (!FSW_NETAGENT_ENABLED(fsw) || flow_mgr_get_num_flows(fsw->fsw_flow_mgr) == 0) { return pkt; } break; } MD_BUFLET_ADDR_ABS(pkt, pkt_buf); l3_hdr = pkt_buf + pkt->pkt_headroom + pkt->pkt_l2_len; ASSERT(fsw->fsw_ipfm != NULL); ASSERT((pkt->pkt_qum_qflags & QUM_F_FLOW_CLASSIFIED) != 0); if (pkt->pkt_flow_ip_ver == IPVERSION) { struct ip *ip = l3_hdr; err = fsw_ip_frag_reass_v4(fsw->fsw_ipfm, &pkt, ip, &nfrags, &tlen); } else { struct ip6_hdr *ip6_hdr = l3_hdr; struct ip6_frag *__single ip6_frag = (struct ip6_frag *)((uint8_t *)l3_hdr + sizeof(struct ip6_hdr)); ASSERT(pkt->pkt_flow_ip_ver == IPV6_VERSION); /* we only handle frag header immediately after v6 header */ err = fsw_ip_frag_reass_v6(fsw->fsw_ipfm, &pkt, ip6_hdr, ip6_frag, &nfrags, &tlen); } if (__improbable(err != 0)) { /* if we get a bad fragment, free it */ pp_free_packet_single(pkt); pkt = NULL; } else { ASSERT(!((pkt != NULL) ^ (nfrags > 0))); } return pkt; } SK_NO_INLINE_ATTRIBUTE static void rx_prepare_packet_mbuf(struct nx_flowswitch *fsw, struct __kern_packet *pkt) { ASSERT(pkt->pkt_pflags & PKT_F_MBUF_DATA); uint32_t mlen = (uint32_t)m_pktlen(pkt->pkt_mbuf); kern_packet_t ph = SK_PTR_ENCODE(pkt, METADATA_TYPE(pkt), METADATA_SUBTYPE(pkt)); /* * This is the case when the packet is coming in from * compat-netif. This packet only has valid metadata * and an attached mbuf. We need to copy enough data * from the mbuf to the packet buffer for the * classifier. Compat netif packet pool is configured * with buffer size of NETIF_COMPAT_MAX_MBUF_DATA_COPY * which is just enough to hold the protocol headers * for the flowswitch classifier. */ pkt->pkt_headroom = 0; METADATA_ADJUST_LEN(pkt, 0, 0); /* * Copy the initial 128 bytes of the packet for * classification. * Ethernet(14) + IPv6 header(40) + * + IPv6 fragment header(8) + * TCP header with options(60). */ fsw->fsw_pkt_copy_from_mbuf(NR_RX, ph, pkt->pkt_headroom, pkt->pkt_mbuf, 0, MIN(mlen, NETIF_COMPAT_MAX_MBUF_DATA_COPY), FALSE, 0); int err = __packet_finalize_with_mbuf(pkt); VERIFY(err == 0); } static struct __kern_packet * rx_prepare_packet(struct nx_flowswitch *fsw, struct __kern_packet *pkt) { pkt->pkt_qum_qflags &= ~QUM_F_FLOW_CLASSIFIED; if (__improbable(pkt->pkt_pflags & PKT_F_MBUF_DATA)) { rx_prepare_packet_mbuf(fsw, pkt); } return pkt; } static struct flow_entry * lookup_flow_with_pkt(struct nx_flowswitch *fsw, struct __kern_packet *pkt, bool input, struct flow_entry *prev_fe) { struct flow_key key __sk_aligned(16); struct flow_entry *__single fe = NULL; ASSERT(pkt->pkt_qum_qflags & QUM_F_FLOW_CLASSIFIED); flow_pkt2key(pkt, input, &key); if (__probable(prev_fe != NULL && prev_fe->fe_key.fk_mask == FKMASK_5TUPLE)) { uint16_t saved_mask = key.fk_mask; key.fk_mask = FKMASK_5TUPLE; if (flow_key_cmp_mask(&prev_fe->fe_key, &key, &fk_mask_5tuple) == 0) { flow_entry_retain(prev_fe); fe = prev_fe; } else { key.fk_mask = saved_mask; } } top: if (__improbable(fe == NULL)) { fe = flow_mgr_find_fe_by_key(fsw->fsw_flow_mgr, &key); } if (__improbable(fe != NULL && (fe->fe_flags & (FLOWENTF_PARENT | FLOWENTF_CHILD)) != 0)) { /* Rx */ if (input) { if (fe->fe_flags & FLOWENTF_PARENT) { struct flow_entry *child_fe = rx_lookup_child_flow(fsw, fe, pkt); if (child_fe != NULL) { flow_entry_release(&fe); fe = child_fe; } } else { if (!rx_flow_demux_match(fsw, fe, pkt)) { flow_entry_release(&fe); fe = NULL; goto top; } } } else { /* Tx */ if (__improbable(!_UUID_MATCH(pkt->pkt_flow_id, fe->fe_uuid))) { if (__probable(fe->fe_flags & FLOWENTF_PARENT)) { struct flow_entry *__single parent_fe = fe; fe = tx_lookup_child_flow(parent_fe, pkt->pkt_flow_id); flow_entry_release(&parent_fe); } else { flow_entry_release(&fe); fe = NULL; goto top; } } } } SK_LOG_VAR(char fkbuf[FLOWKEY_DBGBUF_SIZE]); SK_DF(SK_VERB_FSW_DP | SK_VERB_LOOKUP, "%s %s %s \"%s\" fe %p", input ? "Rx" : "Tx", if_name(fsw->fsw_ifp), sk_proc_name(current_proc()), fk2str(&key, fkbuf, sizeof(fkbuf)), SK_KVA(fe)); return fe; } SK_NO_INLINE_ATTRIBUTE static bool pkt_is_for_listener(struct flow_entry *fe, struct __kern_packet *pkt) { struct nx_flowswitch *fsw = fe->fe_fsw; struct ifnet *ifp = fsw->fsw_ifp; struct in_ifaddr *ia = NULL; struct in_ifaddr *best_ia = NULL; struct in6_ifaddr *ia6 = NULL; struct in6_ifaddr *best_ia6 = NULL; struct ifnet *match_ifp = NULL; struct __flow *flow = pkt->pkt_flow; bool result = false; ASSERT(pkt->pkt_qum_qflags & QUM_F_FLOW_CLASSIFIED); if (flow->flow_ip_ver == IPVERSION) { if (IN_ZERONET(ntohl(flow->flow_ipv4_dst.s_addr)) || IN_LOOPBACK(ntohl(flow->flow_ipv4_dst.s_addr)) || IN_LINKLOCAL(ntohl(flow->flow_ipv4_dst.s_addr)) || IN_DS_LITE(ntohl(flow->flow_ipv4_dst.s_addr)) || IN_6TO4_RELAY_ANYCAST(ntohl(flow->flow_ipv4_dst.s_addr)) || IN_MULTICAST(ntohl(flow->flow_ipv4_dst.s_addr)) || INADDR_BROADCAST == flow->flow_ipv4_dst.s_addr) { result = true; goto done; } /* * Check for a match in the hash bucket. */ lck_rw_lock_shared(&in_ifaddr_rwlock); TAILQ_FOREACH(ia, INADDR_HASH(flow->flow_ipv4_dst.s_addr), ia_hash) { if (IA_SIN(ia)->sin_addr.s_addr == flow->flow_ipv4_dst.s_addr) { best_ia = ia; match_ifp = ia->ia_ifp; if (match_ifp == ifp) { break; } /* * Continue the loop in case there's a exact match with another * interface */ } } if (best_ia != NULL) { if (match_ifp != ifp && ipforwarding == 0 && (match_ifp->if_family == IFNET_FAMILY_IPSEC || match_ifp->if_family == IFNET_FAMILY_UTUN)) { /* * Drop when interface address check is strict and forwarding * is disabled */ } else { lck_rw_done(&in_ifaddr_rwlock); result = true; goto done; } } lck_rw_done(&in_ifaddr_rwlock); if (ifp->if_flags & IFF_BROADCAST) { /* * Check for broadcast addresses. * * Only accept broadcast packets that arrive via the matching * interface. Reception of forwarded directed broadcasts would be * handled via ip_forward() and ether_frameout() with the loopback * into the stack for SIMPLEX interfaces handled by ether_frameout(). */ struct ifaddr *ifa; ifnet_lock_shared(ifp); TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { if (ifa->ifa_addr->sa_family != AF_INET) { continue; } ia = ifatoia(ifa); if (satosin(&ia->ia_broadaddr)->sin_addr.s_addr == flow->flow_ipv4_dst.s_addr || ia->ia_netbroadcast.s_addr == flow->flow_ipv4_dst.s_addr) { ifnet_lock_done(ifp); result = true; goto done; } } ifnet_lock_done(ifp); } } else { struct in6_ifaddrhashhead *ia6_hash_head; if (IN6_IS_ADDR_LOOPBACK(&flow->flow_ipv6_dst) || IN6_IS_ADDR_LINKLOCAL(&flow->flow_ipv6_dst) || IN6_IS_ADDR_MULTICAST(&flow->flow_ipv6_dst)) { result = true; goto done; } /* * Check for exact addresses in the hash bucket. */ lck_rw_lock_shared(&in6_ifaddr_rwlock); /* XXX -fbounds-safety: external dependency on ip6_input.c */ ia6_hash_head = __unsafe_forge_bidi_indexable(struct in6_ifaddrhashhead *, in6_ifaddrhashtbl, in6addr_nhash * sizeof(*in6_ifaddrhashtbl)); ia6_hash_head = &ia6_hash_head[in6addr_hashval(&flow->flow_ipv6_dst)]; TAILQ_FOREACH(ia6, ia6_hash_head, ia6_hash) { if (in6_are_addr_equal_scoped(&ia6->ia_addr.sin6_addr, &flow->flow_ipv6_dst, ia6->ia_ifp->if_index, ifp->if_index)) { if ((ia6->ia6_flags & (IN6_IFF_NOTREADY | IN6_IFF_CLAT46))) { continue; } best_ia6 = ia6; if (ia6->ia_ifp == ifp) { break; } /* * Continue the loop in case there's a exact match with another * interface */ } } if (best_ia6 != NULL) { if (best_ia6->ia_ifp != ifp && ip6_forwarding == 0 && (best_ia6->ia_ifp->if_family == IFNET_FAMILY_IPSEC || best_ia6->ia_ifp->if_family == IFNET_FAMILY_UTUN)) { /* * Drop when interface address check is strict and forwarding * is disabled */ } else { lck_rw_done(&in6_ifaddr_rwlock); result = true; goto done; } } lck_rw_done(&in6_ifaddr_rwlock); } /* * In forwarding mode, if the destination address * of the packet does not match any interface * address, it maybe destined to the client device */ SK_DF(SK_VERB_FSW_DP | SK_VERB_RX | SK_VERB_FLOW, "Rx flow does not match interface address"); done: return result; } static struct flow_entry * rx_lookup_flow(struct nx_flowswitch *fsw, struct __kern_packet *pkt, struct flow_entry *prev_fe) { struct flow_entry *__single fe; fe = lookup_flow_with_pkt(fsw, pkt, true, prev_fe); _FSW_INJECT_ERROR(2, fe, NULL, flow_entry_release, &fe); if (fe == NULL) { FSW_STATS_INC(FSW_STATS_RX_FLOW_NOT_FOUND); return NULL; } if (__improbable(fe->fe_key.fk_mask == FKMASK_2TUPLE && fe->fe_flags & FLOWENTF_LISTENER) && !pkt_is_for_listener(fe, pkt)) { FSW_STATS_INC(FSW_STATS_RX_PKT_NOT_LISTENER); flow_entry_release(&fe); return NULL; } if (__improbable(fe->fe_flags & FLOWENTF_TORN_DOWN)) { FSW_STATS_INC(FSW_STATS_RX_FLOW_TORNDOWN); SK_DF(SK_VERB_FSW_DP | SK_VERB_RX | SK_VERB_FLOW, "Rx flow torn down"); flow_entry_release(&fe); return NULL; } if (__improbable(fe->fe_flags & FLOWENTF_AOP_OFFLOAD)) { FSW_STATS_INC(FSW_STATS_RX_DISABLED); SK_DF(SK_VERB_FSW_DP | SK_VERB_RX | SK_VERB_FLOW, "Rx not allowed for this flow"); flow_entry_release(&fe); } return fe; } static inline void rx_flow_batch_packets(struct flow_entry_list *fes, struct flow_entry *fe, struct __kern_packet *pkt, uint64_t tid) { /* * Among threads working on the same fe, the first thread that reaches here * will be responsible for processing all the packets until a point when * it does not see new packets in fe_rx_pktq. Other threads only * enqueue their packets but do not add the flow entry to their flow entry list. */ lck_mtx_lock(&fe->fe_rx_pktq_lock); if (fe->fe_rx_worker_tid == 0) { fe->fe_rx_worker_tid = tid; } else if (__improbable(fe->fe_rx_worker_tid != tid)) { STATS_INC(&fe->fe_fsw->fsw_stats, FSW_STATS_RX_FLOW_IN_USE); } if (__improbable(pkt->pkt_flow_ip_is_frag)) { fe->fe_rx_frag_count++; } fe->fe_rx_pktq_bytes += pkt->pkt_flow_ulen; /* KPKTQ_ENQUEUE_LIST is needed until frags become chained buflet */ if (KPKTQ_EMPTY(&fe->fe_rx_pktq) && tid == fe->fe_rx_worker_tid) { ASSERT(KPKTQ_LEN(&fe->fe_rx_pktq) == 0); TAILQ_INSERT_TAIL(fes, fe, fe_rx_link); KPKTQ_ENQUEUE_LIST(&fe->fe_rx_pktq, pkt); lck_mtx_unlock(&fe->fe_rx_pktq_lock); } else { KPKTQ_ENQUEUE_LIST(&fe->fe_rx_pktq, pkt); lck_mtx_unlock(&fe->fe_rx_pktq_lock); flow_entry_release(&fe); } } static void tx_flow_batch_packet(struct flow_entry_list *fes, struct flow_entry *fe, struct __kern_packet *pkt) { /* record frag continuation */ if (__improbable(pkt->pkt_flow_ip_is_first_frag)) { ASSERT(pkt->pkt_flow_ip_is_frag); fe->fe_tx_is_cont_frag = true; fe->fe_tx_frag_id = pkt->pkt_flow_ip_frag_id; } else if (__probable(!pkt->pkt_flow_ip_is_frag)) { fe->fe_tx_is_cont_frag = false; fe->fe_tx_frag_id = 0; } if (KPKTQ_EMPTY(&fe->fe_tx_pktq)) { ASSERT(KPKTQ_LEN(&fe->fe_tx_pktq) == 0); TAILQ_INSERT_TAIL(fes, fe, fe_tx_link); KPKTQ_ENQUEUE(&fe->fe_tx_pktq, pkt); } else { ASSERT(!TAILQ_EMPTY(fes)); KPKTQ_ENQUEUE(&fe->fe_tx_pktq, pkt); flow_entry_release(&fe); } } static inline void fsw_rx_ring_dequeue_pktq(struct nx_flowswitch *fsw, struct __kern_channel_ring *r, uint32_t n_pkts_max, struct pktq *pktq, uint32_t *n_bytes) { uint32_t n_pkts = 0; slot_idx_t idx, idx_end; idx = r->ckr_khead; idx_end = r->ckr_rhead; ASSERT(KPKTQ_EMPTY(pktq)); *n_bytes = 0; for (; n_pkts < n_pkts_max && idx != idx_end; idx = SLOT_NEXT(idx, r->ckr_lim)) { struct __kern_slot_desc *ksd = KR_KSD(r, idx); struct __kern_packet *pkt = ksd->sd_pkt; ASSERT(pkt->pkt_nextpkt == NULL); KR_SLOT_DETACH_METADATA(r, ksd); _FSW_INJECT_ERROR(20, pkt->pkt_qum_qflags, pkt->pkt_qum_qflags | QUM_F_DROPPED, null_func); if (__improbable(((pkt->pkt_qum_qflags & QUM_F_DROPPED) != 0)) || (pkt->pkt_length == 0)) { FSW_STATS_INC(FSW_STATS_DROP); pp_free_packet_single(pkt); continue; } n_pkts++; *n_bytes += pkt->pkt_length; KPKTQ_ENQUEUE(pktq, pkt); } r->ckr_khead = idx; r->ckr_ktail = SLOT_PREV(idx, r->ckr_lim); } /* * This is only for estimating how many packets each GSO packet will need. * The number does not need to be exact because any leftover packets allocated * will be freed. */ static uint32_t estimate_gso_pkts(struct __kern_packet *pkt) { packet_tso_flags_t tso_flags; uint16_t mss; uint32_t n_pkts = 0, total_hlen = 0, total_len = 0; tso_flags = pkt->pkt_csum_flags & PACKET_CSUM_TSO_FLAGS; mss = pkt->pkt_proto_seg_sz; if (tso_flags == PACKET_TSO_IPV4) { total_hlen = sizeof(struct ip) + sizeof(struct tcphdr); } else if (tso_flags == PACKET_TSO_IPV6) { total_hlen = sizeof(struct ip6_hdr) + sizeof(struct tcphdr); } if (total_hlen != 0 && mss != 0) { total_len = pkt->pkt_length; n_pkts = (uint32_t) (SK_ROUNDUP((total_len - total_hlen), mss) / mss); } DTRACE_SKYWALK5(estimate__gso, packet_tso_flags_t, tso_flags, uint32_t, total_hlen, uint32_t, total_len, uint16_t, mss, uint32_t, n_pkts); return n_pkts; } /* * This function retrieves a chain of packets of the same type only * (GSO or non-GSO). */ static inline void fsw_tx_ring_dequeue_pktq(struct nx_flowswitch *fsw, struct __kern_channel_ring *r, uint32_t n_pkts_max, struct pktq *pktq, uint32_t *n_bytes, uint32_t *gso_pkts_estimate) { uint32_t n_pkts = 0; slot_idx_t idx, idx_end; idx = r->ckr_khead; idx_end = r->ckr_rhead; struct nexus_vp_adapter *vpna = VPNA(KRNA(r)); boolean_t gso_enabled, gso_required; uint32_t gso_pkts; gso_enabled = (fsw->fsw_tso_mode == FSW_TSO_MODE_SW); ASSERT(KPKTQ_EMPTY(pktq)); *n_bytes = 0; for (; n_pkts < n_pkts_max && (!gso_enabled || fsw_gso_batch == 0 || *gso_pkts_estimate < fsw_gso_batch) && idx != idx_end; idx = SLOT_NEXT(idx, r->ckr_lim)) { struct __kern_slot_desc *ksd = KR_KSD(r, idx); struct __kern_packet *pkt = ksd->sd_pkt; ASSERT(pkt->pkt_nextpkt == NULL); _FSW_INJECT_ERROR(20, pkt->pkt_qum_qflags, pkt->pkt_qum_qflags | QUM_F_DROPPED, null_func); if (__improbable(((pkt->pkt_qum_qflags & QUM_F_DROPPED) != 0)) || (pkt->pkt_length == 0)) { KR_SLOT_DETACH_METADATA(r, ksd); FSW_STATS_INC(FSW_STATS_DROP); pp_free_packet_single(pkt); continue; } if (gso_enabled) { gso_pkts = estimate_gso_pkts(pkt); /* * We use the first packet to determine what * type the subsequent ones need to be (GSO or * non-GSO). */ if (n_pkts == 0) { gso_required = (gso_pkts != 0); } else { if (gso_required != (gso_pkts != 0)) { break; } } *gso_pkts_estimate += gso_pkts; } KR_SLOT_DETACH_METADATA(r, ksd); if (NA_CHANNEL_EVENT_ATTACHED(&vpna->vpna_up)) { __packet_set_tx_nx_port(SK_PKT2PH(pkt), vpna->vpna_nx_port, vpna->vpna_gencnt); } n_pkts++; *n_bytes += pkt->pkt_length; KPKTQ_ENQUEUE(pktq, pkt); } r->ckr_khead = idx; r->ckr_ktail = SLOT_PREV(idx, r->ckr_lim); DTRACE_SKYWALK5(tx__ring__dequeue, struct nx_flowswitch *, fsw, ifnet_t, fsw->fsw_ifp, uint32_t, n_pkts, uint32_t, *n_bytes, uint32_t, *gso_pkts_estimate); } static void fsw_ring_enqueue_pktq(struct nx_flowswitch *fsw, struct __kern_channel_ring *r, struct pktq *pktq) { #pragma unused(fsw) struct __kern_packet *pkt; struct __kern_quantum *kqum; uint32_t kr_space_avail = 0; uint32_t n, n_pkts = 0, n_bytes = 0; slot_idx_t idx = 0, idx_start = 0, idx_end = 0; kr_enter(r, TRUE); idx_start = r->ckr_ktail; kr_space_avail = kr_available_slots_rxring(r); _FSW_INJECT_ERROR(40, kr_space_avail, 0, null_func); n = MIN(kr_space_avail, KPKTQ_LEN(pktq)); _FSW_INJECT_ERROR(41, n, 0, null_func); idx_end = SLOT_INCREMENT(idx_start, n, r->ckr_lim); idx = idx_start; while (idx != idx_end) { KPKTQ_DEQUEUE(pktq, pkt); kqum = SK_PTR_ADDR_KQUM(pkt); kqum->qum_qflags |= QUM_F_FINALIZED; n_pkts++; n_bytes += pkt->pkt_length; KR_SLOT_ATTACH_METADATA(r, KR_KSD(r, idx), kqum); if (__improbable(pkt->pkt_trace_id != 0)) { KDBG(SK_KTRACE_PKT_RX_FSW | DBG_FUNC_END, pkt->pkt_trace_id); KDBG(SK_KTRACE_PKT_RX_CHN | DBG_FUNC_START, pkt->pkt_trace_id); } idx = SLOT_NEXT(idx, r->ckr_lim); } kr_update_stats(r, n_pkts, n_bytes); /* * ensure slot attachments are visible before updating the * tail pointer */ os_atomic_thread_fence(seq_cst); r->ckr_ktail = idx_end; kr_exit(r); r->ckr_na_notify(r, kernproc, NA_NOTEF_PUSH); SK_DF(SK_VERB_FSW_DP | SK_VERB_RING, "%s enqueued %d pkts", r->ckr_name, n_pkts); } static void pkts_to_pktq(struct __kern_packet **__counted_by(n_pkts)pkts, uint32_t n_pkts, struct pktq *pktq) { ASSERT(KPKTQ_EMPTY(pktq)); for (uint32_t i = 0; i < n_pkts; i++) { struct __kern_packet *__single pkt = pkts[i]; ASSERT(pkt->pkt_nextpkt == NULL); KPKTQ_ENQUEUE(pktq, pkt); } } /* * This function is modeled after nx_netif_host_grab_pkts() in nx_netif_host.c. */ SK_NO_INLINE_ATTRIBUTE static void convert_native_pktq_to_mbufs(struct nx_flowswitch *fsw, struct pktq *pktq, struct mbuf **m_headp, struct mbuf **m_tailp, uint32_t *cnt, uint32_t *bytes) { uint32_t tot_cnt; unsigned int num_segs = 1; struct mbuf *__single mhead, *__single head = NULL; struct mbuf *__single tail = NULL, **__single tailp = &head; uint32_t mhead_cnt, mhead_bufsize; uint32_t mhead_waste = 0; uint32_t mcnt = 0, mbytes = 0; uint32_t largest, max_pkt_len; struct __kern_packet *__single pkt; struct kern_pbufpool *pp; tot_cnt = KPKTQ_LEN(pktq); ASSERT(tot_cnt > 0); mhead_cnt = tot_cnt; /* * Opportunistically batch-allocate the mbufs based on the largest * packet size we've seen in the recent past. Note that we reset * fe_rx_largest_size below if we notice that we're under-utilizing the * allocated buffers (thus disabling this batch allocation). */ largest = *(volatile uint32_t*)&fsw->fsw_rx_largest_size; /* read once */ if (__probable(largest != 0)) { if (largest <= MCLBYTES) { mhead = m_allocpacket_internal(&mhead_cnt, MCLBYTES, &num_segs, M_NOWAIT, 1, 0); mhead_bufsize = MCLBYTES; } else if (largest <= MBIGCLBYTES) { mhead = m_allocpacket_internal(&mhead_cnt, MBIGCLBYTES, &num_segs, M_NOWAIT, 1, 0); mhead_bufsize = MBIGCLBYTES; } else if (largest <= M16KCLBYTES) { mhead = m_allocpacket_internal(&mhead_cnt, M16KCLBYTES, &num_segs, M_NOWAIT, 1, 0); mhead_bufsize = M16KCLBYTES; } else if (largest <= M16KCLBYTES * 2) { num_segs = 2; mhead = m_allocpacket_internal(&mhead_cnt, M16KCLBYTES * 2, &num_segs, M_NOWAIT, 1, 0); mhead_bufsize = M16KCLBYTES * 2; } else { mhead = NULL; mhead_bufsize = mhead_cnt = 0; } } else { mhead = NULL; mhead_bufsize = mhead_cnt = 0; } DTRACE_SKYWALK4(bufstats, uint32_t, largest, uint32_t, mhead_bufsize, uint32_t, mhead_cnt, uint32_t, tot_cnt); pp = __DECONST(struct kern_pbufpool *, KPKTQ_FIRST(pktq)->pkt_qum.qum_pp); max_pkt_len = PP_BUF_SIZE_DEF(pp) * pp->pp_max_frags; KPKTQ_FOREACH(pkt, pktq) { uint32_t tot_len, len; uint16_t pad, llhlen, iphlen; boolean_t do_cksum_rx; struct mbuf *__single m; int error; llhlen = pkt->pkt_l2_len; len = pkt->pkt_length; if (__improbable(len > max_pkt_len || len == 0 || llhlen > len)) { DTRACE_SKYWALK2(bad__len, struct nx_flowswitch *, fsw, struct __kern_packet *, pkt); FSW_STATS_INC(FSW_STATS_DROP); FSW_STATS_INC(FSW_STATS_RX_COPY_BAD_LEN); continue; } /* begin payload on 32-bit boundary; figure out the padding */ pad = (uint16_t)P2ROUNDUP(llhlen, sizeof(uint32_t)) - llhlen; tot_len = pad + len; /* remember largest packet size */ if (__improbable(largest < tot_len)) { largest = MAX(tot_len, MCLBYTES); } /* * If the above batch allocation returned partial * success, we try a blocking allocation here again. */ m = mhead; if (__improbable(m == NULL || tot_len > mhead_bufsize)) { ASSERT(mhead != NULL || mhead_cnt == 0); num_segs = 1; if (tot_len > M16KCLBYTES) { num_segs = 0; } if ((error = mbuf_allocpacket(MBUF_DONTWAIT, tot_len, &num_segs, &m)) != 0) { DTRACE_SKYWALK2(bad__len, struct nx_flowswitch *, fsw, struct __kern_packet *, pkt); FSW_STATS_INC(FSW_STATS_DROP_NOMEM_MBUF); FSW_STATS_INC(FSW_STATS_DROP); continue; } } else { mhead = m->m_nextpkt; m->m_nextpkt = NULL; ASSERT(mhead_cnt != 0); --mhead_cnt; /* check if we're underutilizing large buffers */ if (__improbable(mhead_bufsize > MCLBYTES && tot_len < (mhead_bufsize >> 1))) { ++mhead_waste; } /* * Clean up unused mbuf. * Ony need to do this when we pre-alloc 2x16K mbufs */ if (__improbable(mhead_bufsize >= tot_len + M16KCLBYTES)) { ASSERT(mhead_bufsize == 2 * M16KCLBYTES); struct mbuf *m_extra = m->m_next; ASSERT(m_extra != NULL); ASSERT(m_extra->m_len == 0); ASSERT(M_SIZE(m_extra) == M16KCLBYTES); m->m_next = NULL; m_freem(m_extra); FSW_STATS_INC(FSW_STATS_RX_WASTED_16KMBUF); } } m->m_data += pad; /* * XXX -fbounds-safety: external dependency * mtod does not work because m_len is 0 */ m->m_pkthdr.pkt_hdr = m_mtod_current(m); /* don't include IP header from partial sum */ if (__probable((pkt->pkt_qum_qflags & QUM_F_FLOW_CLASSIFIED) != 0)) { iphlen = pkt->pkt_flow_ip_hlen; do_cksum_rx = sk_cksum_rx; } else { iphlen = 0; do_cksum_rx = FALSE; } fsw->fsw_pkt_copy_to_mbuf(NR_RX, SK_PKT2PH(pkt), pkt->pkt_headroom, m, 0, len, do_cksum_rx, llhlen + iphlen); FSW_STATS_INC(FSW_STATS_RX_COPY_PKT2MBUF); if (do_cksum_rx) { FSW_STATS_INC(FSW_STATS_RX_COPY_SUM); } #if DEBUG || DEVELOPMENT if (__improbable(pkt_trailers > 0)) { (void) pkt_add_trailers_mbuf(m, llhlen + iphlen); } #endif /* DEBUG || DEVELOPMENT */ m_adj(m, llhlen); m->m_pkthdr.rcvif = fsw->fsw_ifp; if (__improbable((pkt->pkt_link_flags & PKT_LINKF_ETHFCS) != 0)) { m->m_flags |= M_HASFCS; } if (__improbable(pkt->pkt_pflags & PKT_F_WAKE_PKT)) { m->m_pkthdr.pkt_flags |= PKTF_WAKE_PKT; } ASSERT(m->m_nextpkt == NULL); tail = m; *tailp = m; tailp = &m->m_nextpkt; mcnt++; mbytes += m_pktlen(m); } /* free any leftovers */ if (__improbable(mhead != NULL)) { DTRACE_SKYWALK1(mhead__leftover, uint32_t, mhead_cnt); ASSERT(mhead_cnt != 0); (void) m_freem_list(mhead); mhead = NULL; mhead_cnt = 0; } /* reset if most packets (>50%) are smaller than our batch buffers */ if (__improbable(mhead_waste > ((uint32_t)tot_cnt >> 1))) { DTRACE_SKYWALK4(mhead__waste, struct nx_flowswitch *, fsw, struct flow_entry *, NULL, uint32_t, mhead_waste, uint32_t, tot_cnt); largest = 0; } if (largest != fsw->fsw_rx_largest_size) { os_atomic_store(&fsw->fsw_rx_largest_size, largest, release); } pp_free_pktq(pktq); *m_headp = head; *m_tailp = tail; *cnt = mcnt; *bytes = mbytes; } /* * This function only extracts the mbuf from the packet. The caller frees * the packet. */ static inline struct mbuf * convert_compat_pkt_to_mbuf(struct nx_flowswitch *fsw, struct __kern_packet *pkt) { struct mbuf *m; struct pkthdr *mhdr; uint16_t llhlen; m = pkt->pkt_mbuf; ASSERT(m != NULL); llhlen = pkt->pkt_l2_len; if (llhlen > pkt->pkt_length) { m_freem(m); KPKT_CLEAR_MBUF_DATA(pkt); DTRACE_SKYWALK2(bad__len, struct nx_flowswitch *, fsw, struct __kern_packet *, pkt); FSW_STATS_INC(FSW_STATS_DROP); FSW_STATS_INC(FSW_STATS_RX_COPY_BAD_LEN); return NULL; } mhdr = &m->m_pkthdr; if ((mhdr->csum_flags & CSUM_DATA_VALID) == 0 && PACKET_HAS_PARTIAL_CHECKSUM(pkt)) { mhdr->csum_flags &= ~CSUM_RX_FLAGS; mhdr->csum_flags |= (CSUM_DATA_VALID | CSUM_PARTIAL); mhdr->csum_rx_start = pkt->pkt_csum_rx_start_off; mhdr->csum_rx_val = pkt->pkt_csum_rx_value; } #if DEBUG || DEVELOPMENT uint32_t extra = 0; if (__improbable(pkt_trailers > 0)) { extra = pkt_add_trailers_mbuf(m, llhlen); } #endif /* DEBUG || DEVELOPMENT */ m_adj(m, llhlen); ASSERT((uint32_t)m_pktlen(m) == ((pkt->pkt_length - llhlen) + extra)); KPKT_CLEAR_MBUF_DATA(pkt); return m; } SK_NO_INLINE_ATTRIBUTE static void convert_compat_pktq_to_mbufs(struct nx_flowswitch *fsw, struct pktq *pktq, struct mbuf **m_head, struct mbuf **m_tail, uint32_t *cnt, uint32_t *bytes) { struct __kern_packet *pkt; struct mbuf *__single m, *__single head = NULL; struct mbuf *__single tail = NULL, **__single tailp = &head; uint32_t c = 0, b = 0; KPKTQ_FOREACH(pkt, pktq) { m = convert_compat_pkt_to_mbuf(fsw, pkt); if (__improbable(m == NULL)) { continue; } tail = m; *tailp = m; tailp = &m->m_nextpkt; c++; b += m_pktlen(m); } pp_free_pktq(pktq); *m_head = head; *m_tail = tail; *cnt = c; *bytes = b; } void fsw_host_sendup(struct ifnet *ifp, struct mbufq *host_mq) { struct ifnet_stat_increment_param s; if (mbufq_empty(host_mq)) { return; } bzero(&s, sizeof(s)); s.packets_in = host_mq->count; s.bytes_in = host_mq->bytes; dlil_input_handler(ifp, mbufq_first(host_mq), mbufq_last(host_mq), &s, FALSE, NULL); } void fsw_host_rx_cb(struct nx_flowswitch *fsw, struct pktq *pktq) { ifnet_fsw_rx_cb_t __single cb; void *__single cb_arg; ASSERT(!KPKTQ_EMPTY(pktq)); if (ifnet_get_flowswitch_rx_callback(fsw->fsw_ifp, &cb, &cb_arg) == 0) { ASSERT(cb != NULL); ASSERT(cb_arg != NULL); (*cb)(cb_arg, pktq); ifnet_release_flowswitch_rx_callback(fsw->fsw_ifp); if (KPKTQ_EMPTY(pktq)) { return; } else { DTRACE_SKYWALK2(leftover__pkts, struct nx_flowswitch *, fsw, struct pktq *, pktq); } } } void fsw_host_rx_enqueue_mbq(struct nx_flowswitch *fsw, struct pktq *pktq, struct mbufq *host_mq) { struct mbuf *__single m_head = NULL, *__single m_tail = NULL; uint32_t cnt = 0, bytes = 0; boolean_t compat; if (KPKTQ_EMPTY(pktq)) { return; } /* All packets in the pktq must have the same type */ compat = ((KPKTQ_FIRST(pktq)->pkt_pflags & PKT_F_MBUF_DATA) != 0); if (compat) { convert_compat_pktq_to_mbufs(fsw, pktq, &m_head, &m_tail, &cnt, &bytes); } else { convert_native_pktq_to_mbufs(fsw, pktq, &m_head, &m_tail, &cnt, &bytes); } if (__improbable(m_head == NULL)) { DTRACE_SKYWALK1(empty__head, struct nx_flowswitch *, fsw); return; } mbufq_enqueue(host_mq, m_head, m_tail, cnt, bytes); } void fsw_ring_enqueue_tail_drop(struct nx_flowswitch *fsw, struct __kern_channel_ring *r, struct pktq *pktq) { fsw_ring_enqueue_pktq(fsw, r, pktq); /* * Rx stall detection: don't update enqueue ts if dequeue ts < enqueue ts. * This is to ensure we use the timestamp of the earliest enqueue without * a dequeue. */ if (r->ckr_rx_dequeue_ts >= r->ckr_rx_enqueue_ts) { r->ckr_rx_enqueue_ts = net_uptime(); } FSW_STATS_ADD(FSW_STATS_RX_DST_RING_FULL, KPKTQ_LEN(pktq)); dp_drop_pktq(fsw, pktq, 0, DROP_REASON_RX_DST_RING_FULL, __LINE__, DROPTAP_FLAG_L2_MISSING); } static struct nexus_adapter * flow_get_na(struct nx_flowswitch *fsw, struct flow_entry *fe) { struct kern_nexus *nx = fsw->fsw_nx; struct nexus_adapter *na = NULL; nexus_port_t port = fe->fe_nx_port; if (port == FSW_VP_DEV || port == FSW_VP_HOST) { SK_ERR("dev or host ports have no NA"); return NULL; } if (__improbable(!nx_port_is_valid(nx, port))) { SK_DF(SK_VERB_FSW_DP, "%s[%d] port no longer valid", if_name(fsw->fsw_ifp), port); return NULL; } na = nx_port_get_na(nx, port); if (__improbable(na == NULL)) { FSW_STATS_INC(FSW_STATS_DST_NXPORT_INVALID); SK_DF(SK_VERB_FSW_DP, "%s[%d] NA no longer valid", if_name(fsw->fsw_ifp), port); return NULL; } if (__improbable(!NA_IS_ACTIVE(na))) { FSW_STATS_INC(FSW_STATS_DST_NXPORT_INACTIVE); SK_DF(SK_VERB_FSW_DP, "%s[%d] NA no longer active", if_name(fsw->fsw_ifp), port); return NULL; } if (__improbable(nx_port_is_defunct(nx, port))) { FSW_STATS_INC(FSW_STATS_DST_NXPORT_DEFUNCT); SK_DF(SK_VERB_FSW_DP, "%s[%d] NA defuncted", if_name(fsw->fsw_ifp), port); return NULL; } return na; } static inline struct __kern_channel_ring * flow_get_ring(struct nx_flowswitch *fsw, struct flow_entry *fe, enum txrx txrx) { struct nexus_vp_adapter *na = NULL; struct __kern_channel_ring *__single r = NULL; na = VPNA(flow_get_na(fsw, fe)); if (__improbable(na == NULL)) { return NULL; } switch (txrx) { case NR_RX: r = KR_SINGLE(&na->vpna_up.na_rx_rings[0]); break; case NR_TX: r = KR_SINGLE(&na->vpna_up.na_tx_rings[0]); break; default: __builtin_unreachable(); VERIFY(0); } if (__improbable(KR_DROP(r))) { FSW_STATS_INC(FSW_STATS_DST_RING_DROPMODE); SK_DF(SK_VERB_FSW_DP | SK_VERB_RING, "r %p %s drop mode", SK_KVA(r), r->ckr_name); return NULL; } ASSERT(KRNA(r)->na_md_type == NEXUS_META_TYPE_PACKET); #if (DEVELOPMENT || DEBUG) if (r != NULL) { _FSW_INJECT_ERROR(4, r, NULL, null_func); } #endif /* DEVELOPMENT || DEBUG */ return r; } struct __kern_channel_ring * fsw_flow_get_rx_ring(struct nx_flowswitch *fsw, struct flow_entry *fe) { return flow_get_ring(fsw, fe, NR_RX); } static bool dp_flow_route_process(struct nx_flowswitch *fsw, struct flow_entry *fe) { struct flow_route *fr = fe->fe_route; struct ifnet *ifp = fsw->fsw_ifp; if (__improbable(!(fe->fe_flags & FLOWENTF_NONVIABLE) && !fe->fe_want_nonviable && (fe->fe_key.fk_mask & FKMASK_SRC) && fe->fe_laddr_gencnt != ifp->if_nx_flowswitch.if_fsw_ipaddr_gencnt && !flow_route_key_validate(&fe->fe_key, ifp, &fe->fe_laddr_gencnt))) { /* * The source address is no longer around; we want this * flow to be nonviable, but that requires holding the lock * as writer (which isn't the case now.) Indicate that * we need to finalize the nonviable later down below. * * We also request that the flow route be re-configured, * if this is a connected mode flow. * */ if (!(fe->fe_flags & FLOWENTF_NONVIABLE)) { /* * fsw_pending_nonviable is a hint for reaper thread; * due to the fact that setting fe_want_nonviable and * incrementing fsw_pending_nonviable counter is not * atomic, let the increment happen first, and the * thread losing the CAS does decrement. */ os_atomic_inc(&fsw->fsw_pending_nonviable, relaxed); if (os_atomic_cmpxchg(&fe->fe_want_nonviable, 0, 1, acq_rel)) { fsw_reap_sched(fsw); } else { os_atomic_dec(&fsw->fsw_pending_nonviable, relaxed); } } if (fr != NULL) { os_atomic_inc(&fr->fr_want_configure, relaxed); } } /* if flow was (or is going to be) marked as nonviable, drop it */ if (__improbable(fe->fe_want_nonviable || (fe->fe_flags & FLOWENTF_NONVIABLE) != 0)) { SK_DF(SK_VERB_FSW_DP | SK_VERB_FLOW, "flow %p non-viable", SK_KVA(fe)); return false; } return true; } bool dp_flow_rx_route_process(struct nx_flowswitch *fsw, struct flow_entry *fe) { bool okay; okay = dp_flow_route_process(fsw, fe); #if (DEVELOPMENT || DEBUG) if (okay) { _FSW_INJECT_ERROR(5, okay, false, null_func); } #endif /* DEVELOPMENT || DEBUG */ return okay; } void dp_flow_rx_process(struct nx_flowswitch *fsw, struct flow_entry *fe, struct pktq *rx_pkts, uint32_t rx_bytes, struct mbufq *host_mq, uint32_t flags) { #pragma unused(flags) struct pktq dpkts; /* dst pool alloc'ed packets */ struct pktq disposed_pkts; /* done src packets */ struct pktq dropped_pkts; /* dropped src packets */ struct pktq transferred_pkts; /* dst packet ready for ring */ struct __kern_packet *pkt, *tpkt; struct kern_pbufpool *dpp; uint32_t n_pkts = KPKTQ_LEN(rx_pkts); uint64_t buf_array[RX_BUFLET_BATCH_COUNT]; uint16_t buf_array_iter = 0; uint32_t cnt, buf_cnt = 0; int err; drop_reason_t reason = DROP_REASON_UNSPECIFIED; uint16_t line = 0; KPKTQ_INIT(&dpkts); KPKTQ_INIT(&dropped_pkts); KPKTQ_INIT(&disposed_pkts); KPKTQ_INIT(&transferred_pkts); if (__improbable(!dp_flow_rx_route_process(fsw, fe))) { SK_ERR("Rx route bad"); fsw_snoop_and_dequeue(fe, &dropped_pkts, rx_pkts, true); FSW_STATS_ADD(FSW_STATS_RX_FLOW_NONVIABLE, n_pkts); reason = DROP_REASON_FSW_FLOW_NONVIABLE; line = __LINE__; goto done; } if (fe->fe_nx_port == FSW_VP_HOST) { /* * The host ring does not exist anymore so we can't take * the enqueue path below. This path should only be hit * for the rare tcp fragmentation case. */ fsw_host_rx_enqueue_mbq(fsw, rx_pkts, host_mq); return; } /* find the ring */ struct __kern_channel_ring *r; r = fsw_flow_get_rx_ring(fsw, fe); if (__improbable(r == NULL)) { fsw_snoop_and_dequeue(fe, &dropped_pkts, rx_pkts, true); reason = DROP_REASON_FSW_RX_RING_NOT_FOUND; line = __LINE__; goto done; } /* snoop before L2 is stripped */ if (__improbable(pktap_total_tap_count != 0)) { fsw_snoop(fsw, fe, rx_pkts, true); } dpp = r->ckr_pp; /* batch allocate enough packets */ err = pp_alloc_pktq(dpp, 1, &dpkts, n_pkts, NULL, NULL, SKMEM_NOSLEEP); if (__improbable(err == ENOMEM)) { ASSERT(KPKTQ_EMPTY(&dpkts)); KPKTQ_CONCAT(&dropped_pkts, rx_pkts); FSW_STATS_ADD(FSW_STATS_DROP_NOMEM_PKT, n_pkts); SK_ERR("failed to alloc %u pkts for kr %s, %p", n_pkts, r->ckr_name, SK_KVA(r)); reason = DROP_REASON_FSW_PP_ALLOC_FAILED; line = __LINE__; goto done; } /* * estimate total number of buflets for the packet chain. */ cnt = howmany(rx_bytes, PP_BUF_SIZE_DEF(dpp)); if (cnt > n_pkts) { ASSERT(dpp->pp_max_frags > 1); cnt -= n_pkts; buf_cnt = MIN(RX_BUFLET_BATCH_COUNT, cnt); err = pp_alloc_buflet_batch(dpp, buf_array, &buf_cnt, SKMEM_NOSLEEP, false); if (__improbable(buf_cnt == 0)) { KPKTQ_CONCAT(&dropped_pkts, rx_pkts); FSW_STATS_ADD(FSW_STATS_DROP_NOMEM_PKT, n_pkts); SK_ERR("failed to alloc %d buflets (err %d) for kr %s %p", cnt, err, r->ckr_name, SK_KVA(r)); reason = DROP_REASON_FSW_PP_ALLOC_FAILED; line = __LINE__; goto done; } err = 0; } /* extra processing for user flow */ KPKTQ_FOREACH_SAFE(pkt, rx_pkts, tpkt) { err = 0; KPKTQ_REMOVE(rx_pkts, pkt); if (rx_bytes > pkt->pkt_flow_ulen) { rx_bytes -= pkt->pkt_flow_ulen; } else { rx_bytes = 0; } err = flow_pkt_track(fe, pkt, true); _FSW_INJECT_ERROR(33, err, EPROTO, null_func); if (__improbable(err != 0)) { SK_DF(SK_VERB_FLOW_TRACK, "flow_pkt_track failed (err %d)", err); FSW_STATS_INC(FSW_STATS_RX_FLOW_TRACK_ERR); /* if need to trigger RST */ if (err == ENETRESET) { flow_track_abort_tcp(fe, pkt, NULL); } dp_drop_pkt_single(fsw, pkt, 0, DROP_REASON_FSW_FLOW_TRACK_ERR, DROPTAP_FLAG_L2_MISSING); continue; } /* transfer to dpkt */ if (pkt->pkt_qum.qum_pp != dpp) { struct __kern_buflet *bprev, *bnew; struct __kern_packet *dpkt = NULL; uint32_t n_bufs, i; KPKTQ_DEQUEUE(&dpkts, dpkt); /* XXX Why would dpkt be NULL at this point? */ if (__improbable(dpkt == NULL)) { FSW_STATS_INC(FSW_STATS_DROP_NOMEM_PKT); dp_drop_pkt_single(fsw, pkt, 0, DROP_REASON_FSW_PP_ALLOC_FAILED, DROPTAP_FLAG_L2_MISSING); continue; } n_bufs = howmany(pkt->pkt_length, PP_BUF_SIZE_DEF(dpp)); n_bufs--; for (i = 0; i < n_bufs; i++) { if (__improbable(buf_cnt == 0)) { ASSERT(dpp->pp_max_frags > 1); buf_array_iter = 0; cnt = howmany(rx_bytes, PP_BUF_SIZE_DEF(dpp)); n_pkts = KPKTQ_LEN(rx_pkts); if (cnt >= n_pkts) { cnt -= n_pkts; } else { cnt = 0; } cnt += (n_bufs - i); buf_cnt = MIN(RX_BUFLET_BATCH_COUNT, cnt); cnt = buf_cnt; err = pp_alloc_buflet_batch(dpp, buf_array, &buf_cnt, SKMEM_NOSLEEP, false); if (__improbable(buf_cnt == 0)) { FSW_STATS_INC(FSW_STATS_DROP_NOMEM_PKT); dp_drop_pkt_single(fsw, pkt, 0, DROP_REASON_FSW_PP_ALLOC_FAILED, DROPTAP_FLAG_L2_MISSING); pkt = NULL; pp_free_packet_single(dpkt); dpkt = NULL; SK_ERR("failed to alloc %d " "buflets (err %d) for " "kr %s, %p", cnt, err, r->ckr_name, SK_KVA(r)); break; } err = 0; } ASSERT(buf_cnt != 0); if (i == 0) { PKT_GET_FIRST_BUFLET(dpkt, 1, bprev); } /* * XXX -fbounds-safety: can't avoid using forge * unless we change the signature of * pp_alloc_buflet_batch(). */ bnew = __unsafe_forge_single(kern_buflet_t, buf_array[buf_array_iter]); buf_array[buf_array_iter] = 0; buf_array_iter++; buf_cnt--; VERIFY(kern_packet_add_buflet(SK_PKT2PH(dpkt), bprev, bnew) == 0); bprev = bnew; } if (__improbable(err != 0)) { continue; } err = copy_packet_from_dev(fsw, pkt, dpkt); _FSW_INJECT_ERROR(43, err, EINVAL, null_func); if (__improbable(err != 0)) { SK_ERR("copy packet failed (err %d)", err); dp_drop_pkt_single(fsw, pkt, 0, DROP_REASON_FSW_PKT_COPY_FAILED, DROPTAP_FLAG_L2_MISSING); pp_free_packet_single(dpkt); dpkt = NULL; continue; } KPKTQ_ENQUEUE(&disposed_pkts, pkt); pkt = dpkt; } _UUID_COPY(pkt->pkt_flow_id, fe->fe_uuid); _UUID_COPY(pkt->pkt_policy_euuid, fe->fe_eproc_uuid); pkt->pkt_policy_id = fe->fe_policy_id; pkt->pkt_skip_policy_id = fe->fe_skip_policy_id; pkt->pkt_transport_protocol = fe->fe_transport_protocol; if (pkt->pkt_bufs_cnt > 1) { pkt->pkt_aggr_type = PKT_AGGR_SINGLE_IP; } KPKTQ_ENQUEUE(&transferred_pkts, pkt); } KPKTQ_FINI(rx_pkts); if (KPKTQ_LEN(&transferred_pkts) > 0) { fsw_ring_enqueue_tail_drop(fsw, r, &transferred_pkts); } KPKTQ_FINI(&transferred_pkts); done: /* Free unused buflets */ while (buf_cnt > 0) { /* * XXX -fbounds-safety: can't avoid using forge unless we change * the signature of pp_alloc_buflet_batch(). */ pp_free_buflet(dpp, __unsafe_forge_single(kern_buflet_t, (kern_buflet_t)(buf_array[buf_array_iter]))); buf_array[buf_array_iter] = 0; buf_array_iter++; buf_cnt--; } dp_free_pktq(fsw, &dpkts); dp_free_pktq(fsw, &disposed_pkts); dp_drop_pktq(fsw, &dropped_pkts, 0, reason, line, DROPTAP_FLAG_L2_MISSING); } static inline void rx_flow_process(struct nx_flowswitch *fsw, struct flow_entry *fe, struct flow_entry_list *fes, struct mbufq *host_mq) { struct pktq rx_pkts; uint32_t rx_bytes; uint32_t rx_proc_flags; ASSERT(!KPKTQ_EMPTY(&fe->fe_rx_pktq)); ASSERT(KPKTQ_LEN(&fe->fe_rx_pktq) != 0); KPKTQ_INIT(&rx_pkts); for (;;) { lck_mtx_lock(&fe->fe_rx_pktq_lock); if (KPKTQ_EMPTY(&fe->fe_rx_pktq)) { fe->fe_rx_worker_tid = 0; TAILQ_REMOVE(fes, fe, fe_rx_link); lck_mtx_unlock(&fe->fe_rx_pktq_lock); break; } KPKTQ_CONCAT(&rx_pkts, &fe->fe_rx_pktq); KPKTQ_DISPOSE(&fe->fe_rx_pktq); rx_bytes = fe->fe_rx_pktq_bytes; rx_proc_flags = fe->fe_rx_frag_count ? FLOW_PROC_FLAG_FRAGMENTS : 0; fe->fe_rx_pktq_bytes = 0; fe->fe_rx_frag_count = 0; lck_mtx_unlock(&fe->fe_rx_pktq_lock); SK_DF(SK_VERB_FSW_DP | SK_VERB_RX, "Rx %d pkts for fe %p port %d", KPKTQ_LEN(&rx_pkts), fe, fe->fe_nx_port); /* flow related processing (default, agg, fpd, etc.) */ fe->fe_rx_process(fsw, fe, &rx_pkts, rx_bytes, host_mq, rx_proc_flags); } ASSERT(KPKTQ_EMPTY(&rx_pkts)); if (__improbable(fe->fe_want_withdraw)) { fsw_reap_sched(fsw); } } static void dp_rx_process_low_power_wake(struct nx_flowswitch *fsw, struct flow_entry *fe) { if (fe->fe_port_reservation == NULL || (fe->fe_flags & FLOWENTF_EXTRL_PORT) != 0) { return; } if (fe->fe_key.fk_proto == IPPROTO_TCP && (fe->fe_flags & FLOWENTF_CONNECTION_IDLE)) { os_log(wake_packet_log_handle, "dp_rx_process_low_power_wake LPW TCP connection idle"); if (flow_track_tcp_want_abort(fe)) { os_atomic_or(&fe->fe_flags, FLOWENTF_CLOSE_NOTIFY | FLOWENTF_WAIT_CLOSE, relaxed); fe->fe_want_withdraw = 1; flow_track_abort_tcp(fe, NULL, NULL); } } else { if_exit_lpw(fsw->fsw_ifp, "dp_rx_process_low_power_wake LPW connection not idle"); } } static inline void dp_rx_process_wake_packet(struct nx_flowswitch *fsw, struct flow_entry *fe, struct __kern_packet *pkt) { /* * We only care about wake packets of flows that belong the flow switch * as wake packets for the host stack are handled by the host input * function */ #if (DEBUG || DEVELOPMENT) /* For testing only */ if (__improbable(fsw->fsw_ifp->if_xflags & IFXF_MARK_WAKE_PKT)) { if (check_wake_pkt(fsw->fsw_ifp, pkt) == true) { /* * This is a one shot command */ fsw->fsw_ifp->if_xflags &= ~IFXF_MARK_WAKE_PKT; pkt->pkt_pflags |= PKT_F_WAKE_PKT; } } #endif /* (DEBUG || DEVELOPMENT) */ if (__improbable(pkt->pkt_pflags & PKT_F_WAKE_PKT)) { if_ports_used_match_pkt(fsw->fsw_ifp, pkt); /* * When a packet is received in LPW mode for an idle TCP connection, the connection * is aborted immediately with a RST so the peer drops the connection at once */ if (if_is_lpw_enabled(fsw->fsw_ifp)) { pkt->pkt_pflags |= __PKT_F_LPW; dp_rx_process_low_power_wake(fsw, fe); } } } static void _fsw_receive(struct nx_flowswitch *fsw, struct pktq *pktq) { struct __kern_packet *__single pkt, *__single tpkt; struct flow_entry_list fes = TAILQ_HEAD_INITIALIZER(fes); struct flow_entry *__single fe, *__single prev_fe; sa_family_t af; struct pktq host_pkts, dropped_pkts; drop_reason_t reason = DROP_REASON_UNSPECIFIED; uint16_t line = 0; int err; uint64_t thread_id; struct mbufq host_mq; struct ifnet *ifp; mbufq_init(&host_mq); KPKTQ_INIT(&host_pkts); KPKTQ_INIT(&dropped_pkts); FSW_RLOCK(fsw); if (__improbable(FSW_QUIESCED(fsw))) { DTRACE_SKYWALK1(rx__quiesced, struct nx_flowswitch *, fsw); KPKTQ_CONCAT(&dropped_pkts, pktq); reason = DROP_REASON_FSW_QUIESCED; line = __LINE__; goto done; } if (__improbable(fsw->fsw_demux == NULL)) { KPKTQ_CONCAT(&dropped_pkts, pktq); reason = DROP_REASON_FSW_DEMUX_FAILED; line = __LINE__; goto done; } ifp = fsw->fsw_ifp; thread_id = thread_tid(current_thread()); prev_fe = NULL; KPKTQ_FOREACH_SAFE(pkt, pktq, tpkt) { if (__probable(tpkt)) { void *baddr; MD_BUFLET_ADDR_ABS_PKT(tpkt, baddr); SK_PREFETCH(baddr, 0); /* prefetch L3 and L4 flow structs */ SK_PREFETCHW(tpkt->pkt_flow, 0); SK_PREFETCHW(tpkt->pkt_flow, 128); } KPKTQ_REMOVE(pktq, pkt); pkt = rx_prepare_packet(fsw, pkt); af = fsw->fsw_demux(fsw, pkt); if (__improbable(af == AF_UNSPEC)) { KPKTQ_ENQUEUE(&host_pkts, pkt); continue; } err = flow_pkt_classify(pkt, fsw->fsw_ifp, af, TRUE); _FSW_INJECT_ERROR(1, err, ENXIO, null_func); if (__improbable(err != 0)) { FSW_STATS_INC(FSW_STATS_RX_FLOW_EXTRACT_ERR); KPKTQ_ENQUEUE(&host_pkts, pkt); continue; } if (__improbable(pkt->pkt_flow_ip_is_frag)) { pkt = rx_process_ip_frag(fsw, pkt); if (pkt == NULL) { continue; } } prev_fe = fe = rx_lookup_flow(fsw, pkt, prev_fe); if (__improbable(fe == NULL)) { KPKTQ_ENQUEUE_LIST(&host_pkts, pkt); continue; } dp_rx_process_wake_packet(fsw, fe, pkt); rx_flow_batch_packets(&fes, fe, pkt, thread_id); prev_fe = fe; } struct flow_entry *tfe = NULL; TAILQ_FOREACH_SAFE(fe, &fes, fe_rx_link, tfe) { rx_flow_process(fsw, fe, &fes, &host_mq); flow_entry_release(&fe); } if (!KPKTQ_EMPTY(&host_pkts)) { fsw_host_rx_cb(fsw, &host_pkts); fsw_host_rx_enqueue_mbq(fsw, &host_pkts, &host_mq); } done: dp_drop_pktq(fsw, &dropped_pkts, 0, reason, line, 0); FSW_RUNLOCK(fsw); fsw_host_sendup(ifp, &host_mq); } #if (DEVELOPMENT || DEBUG) static void fsw_rps_rx(struct nx_flowswitch *fsw, uint32_t id, struct __kern_packet *pkt) { struct fsw_rps_thread *frt = &fsw->fsw_rps_threads[id]; lck_mtx_lock_spin(&frt->frt_lock); KPKTQ_ENQUEUE(&frt->frt_pktq, pkt); lck_mtx_unlock(&frt->frt_lock); } static void fsw_rps_thread_schedule(struct nx_flowswitch *fsw, uint32_t id) { struct fsw_rps_thread *frt = &fsw->fsw_rps_threads[id]; ASSERT(frt->frt_thread != THREAD_NULL); lck_mtx_lock_spin(&frt->frt_lock); ASSERT(!(frt->frt_flags & (FRT_TERMINATING | FRT_TERMINATED))); frt->frt_requests++; if (!(frt->frt_flags & FRT_RUNNING)) { thread_wakeup((caddr_t)frt); } lck_mtx_unlock(&frt->frt_lock); } __attribute__((noreturn)) static void fsw_rps_thread_cont(void *v, wait_result_t w) { struct fsw_rps_thread *__single frt = v; struct nx_flowswitch *fsw = frt->frt_fsw; lck_mtx_lock(&frt->frt_lock); if (__improbable(w == THREAD_INTERRUPTIBLE || (frt->frt_flags & FRT_TERMINATING) != 0)) { goto terminate; } if (KPKTQ_EMPTY(&frt->frt_pktq)) { goto done; } frt->frt_flags |= FRT_RUNNING; for (;;) { uint32_t requests = frt->frt_requests; struct pktq pkts; KPKTQ_INIT(&pkts); KPKTQ_CONCAT(&pkts, &frt->frt_pktq); lck_mtx_unlock(&frt->frt_lock); sk_protect_t protect; protect = sk_sync_protect(); _fsw_receive(fsw, &pkts); sk_sync_unprotect(protect); lck_mtx_lock(&frt->frt_lock); if ((frt->frt_flags & FRT_TERMINATING) != 0 || requests == frt->frt_requests) { frt->frt_requests = 0; break; } } done: lck_mtx_unlock(&frt->frt_lock); if (!(frt->frt_flags & FRT_TERMINATING)) { frt->frt_flags &= ~FRT_RUNNING; assert_wait(frt, THREAD_UNINT); thread_block_parameter(fsw_rps_thread_cont, frt); __builtin_unreachable(); } else { terminate: LCK_MTX_ASSERT(&frt->frt_lock, LCK_MTX_ASSERT_OWNED); frt->frt_flags &= ~(FRT_RUNNING | FRT_TERMINATING); frt->frt_flags |= FRT_TERMINATED; if (frt->frt_flags & FRT_TERMINATEBLOCK) { thread_wakeup((caddr_t)&frt); } lck_mtx_unlock(&frt->frt_lock); SK_D("fsw_rx_%s_%d terminated", if_name(fsw->fsw_ifp), frt->frt_idx); /* for the extra refcnt from kernel_thread_start() */ thread_deallocate(current_thread()); /* this is the end */ thread_terminate(current_thread()); /* NOTREACHED */ __builtin_unreachable(); } /* must never get here */ VERIFY(0); /* NOTREACHED */ __builtin_unreachable(); } __attribute__((noreturn)) static void fsw_rps_thread_func(void *v, wait_result_t w) { #pragma unused(w) struct fsw_rps_thread *__single frt = v; struct nx_flowswitch *fsw = frt->frt_fsw; const char *__null_terminated tname = NULL; char thread_name[MAXTHREADNAMESIZE]; bzero(thread_name, sizeof(thread_name)); tname = tsnprintf(thread_name, sizeof(thread_name), "fsw_rx_%s_%d", if_name(fsw->fsw_ifp), frt->frt_idx); thread_set_thread_name(frt->frt_thread, tname); SK_D("%s spawned", tname); net_thread_marks_push(NET_THREAD_SYNC_RX); assert_wait(frt, THREAD_UNINT); (void) thread_block_parameter(fsw_rps_thread_cont, frt); __builtin_unreachable(); } static void fsw_rps_thread_join(struct nx_flowswitch *fsw, uint32_t i) { struct fsw_rps_thread *frt = &fsw->fsw_rps_threads[i]; uint64_t f = (1 * NSEC_PER_MSEC); uint64_t s = (1000 * NSEC_PER_SEC); uint32_t c = 0; lck_mtx_lock(&frt->frt_lock); frt->frt_flags |= FRT_TERMINATING; while (!(frt->frt_flags & FRT_TERMINATED)) { uint64_t t = 0; nanoseconds_to_absolutetime((c++ == 0) ? f : s, &t); clock_absolutetime_interval_to_deadline(t, &t); ASSERT(t != 0); frt->frt_flags |= FRT_TERMINATEBLOCK; if (!(frt->frt_flags & FRT_RUNNING)) { thread_wakeup_one((caddr_t)frt); } (void) assert_wait_deadline(&frt->frt_thread, THREAD_UNINT, t); lck_mtx_unlock(&frt->frt_lock); thread_block(THREAD_CONTINUE_NULL); lck_mtx_lock(&frt->frt_lock); frt->frt_flags &= ~FRT_TERMINATEBLOCK; } ASSERT(frt->frt_flags & FRT_TERMINATED); lck_mtx_unlock(&frt->frt_lock); frt->frt_thread = THREAD_NULL; } static void fsw_rps_thread_spawn(struct nx_flowswitch *fsw, uint32_t i) { kern_return_t error; struct fsw_rps_thread *frt = &fsw->fsw_rps_threads[i]; lck_mtx_init(&frt->frt_lock, &nexus_lock_group, &nexus_lock_attr); frt->frt_idx = i; frt->frt_fsw = fsw; error = kernel_thread_start(fsw_rps_thread_func, frt, &frt->frt_thread); ASSERT(!error); KPKTQ_INIT(&frt->frt_pktq); } int fsw_rps_set_nthreads(struct nx_flowswitch* fsw, uint32_t n) { if (n > FSW_RPS_MAX_NTHREADS) { SK_ERR("rps nthreads %d, max %d", n, FSW_RPS_MAX_NTHREADS); return EINVAL; } FSW_WLOCK(fsw); if (n < fsw->fsw_rps_nthreads) { for (uint32_t i = n; i < fsw->fsw_rps_nthreads; i++) { fsw_rps_thread_join(fsw, i); } fsw->fsw_rps_threads = krealloc_type(struct fsw_rps_thread, fsw->fsw_rps_nthreads, n, fsw->fsw_rps_threads, Z_WAITOK | Z_ZERO | Z_NOFAIL); fsw->fsw_rps_nthreads = n; } else if (n > fsw->fsw_rps_nthreads) { uint32_t nthreads_old = fsw->fsw_rps_nthreads; fsw->fsw_rps_threads = krealloc_type(struct fsw_rps_thread, fsw->fsw_rps_nthreads, n, fsw->fsw_rps_threads, Z_WAITOK | Z_ZERO | Z_NOFAIL); fsw->fsw_rps_nthreads = n; for (uint32_t i = nthreads_old; i < n; i++) { fsw_rps_thread_spawn(fsw, i); } } FSW_WUNLOCK(fsw); return 0; } static uint32_t get_rps_id(struct nx_flowswitch *fsw, struct __kern_packet *pkt) { sa_family_t af = fsw->fsw_demux(fsw, pkt); if (__improbable(af == AF_UNSPEC)) { return 0; } flow_pkt_classify(pkt, fsw->fsw_ifp, af, true); if (__improbable((pkt->pkt_qum_qflags & QUM_F_FLOW_CLASSIFIED) == 0)) { return 0; } struct flow_key key; flow_pkt2key(pkt, true, &key); key.fk_mask = FKMASK_5TUPLE; uint32_t id = flow_key_hash(&key) % fsw->fsw_rps_nthreads; return id; } #endif /* !DEVELOPMENT && !DEBUG */ void fsw_receive(struct nx_flowswitch *fsw, struct pktq *pktq) { #if (DEVELOPMENT || DEBUG) FSW_RLOCK(fsw); if (fsw->fsw_rps_nthreads != 0) { struct __kern_packet *pkt, *tpkt; bitmap_t map = 0; static_assert(BITMAP_LEN(FSW_RPS_MAX_NTHREADS) == 1); KPKTQ_FOREACH_SAFE(pkt, pktq, tpkt) { uint32_t id = get_rps_id(fsw, pkt); KPKTQ_REMOVE(pktq, pkt); fsw_rps_rx(fsw, id, pkt); bitmap_set(&map, id); } for (int i = bitmap_first(&map, 64); i >= 0; i = bitmap_next(&map, i)) { fsw_rps_thread_schedule(fsw, i); } FSW_RUNLOCK(fsw); } else #endif /* !DEVELOPMENT && !DEBUG */ { #if (DEVELOPMENT || DEBUG) FSW_RUNLOCK(fsw); #endif /* !DEVELOPMENT && !DEBUG */ _fsw_receive(fsw, pktq); } } int fsw_dev_input_netem_dequeue(void *handle, pktsched_pkt_t *__counted_by(n_pkts)pkts, uint32_t n_pkts) { #pragma unused(handle) struct nx_flowswitch *__single fsw = handle; struct __kern_packet *kpkts[FSW_VP_DEV_BATCH_MAX]; struct pktq pktq; sk_protect_t protect; uint32_t i; ASSERT(n_pkts <= FSW_VP_DEV_BATCH_MAX); for (i = 0; i < n_pkts; i++) { ASSERT(pkts[i].pktsched_ptype == QP_PACKET); ASSERT(pkts[i].pktsched_pkt_kpkt != NULL); kpkts[i] = pkts[i].pktsched_pkt_kpkt; } protect = sk_sync_protect(); KPKTQ_INIT(&pktq); pkts_to_pktq(kpkts, n_pkts, &pktq); fsw_receive(fsw, &pktq); KPKTQ_FINI(&pktq); sk_sync_unprotect(protect); return 0; } static void fsw_dev_input_netem_enqueue(struct nx_flowswitch *fsw, struct pktq *q) { classq_pkt_t p; struct netem *__single ne; struct __kern_packet *pkt, *tpkt; ASSERT(fsw->fsw_ifp != NULL); ne = fsw->fsw_ifp->if_input_netem; ASSERT(ne != NULL); KPKTQ_FOREACH_SAFE(pkt, q, tpkt) { bool pdrop; KPKTQ_REMOVE(q, pkt); CLASSQ_PKT_INIT_PACKET(&p, pkt); netem_enqueue(ne, &p, &pdrop); } } void fsw_devna_rx(struct nexus_adapter *devna, struct __kern_packet *pkt_head, struct nexus_pkt_stats *out_stats) { struct __kern_packet *pkt = pkt_head, *next; struct nx_flowswitch *fsw; uint32_t n_bytes = 0, n_pkts = 0; uint64_t total_pkts = 0, total_bytes = 0; struct pktq q; KPKTQ_INIT(&q); if (__improbable(devna->na_ifp == NULL || (fsw = fsw_ifp_to_fsw(devna->na_ifp)) == NULL)) { SK_ERR("fsw not attached, dropping %d pkts", KPKTQ_LEN(&q)); dp_drop_pkt_chain(pkt_head, 0, DROP_REASON_FSW_QUIESCED, DROPTAP_FLAG_L2_MISSING); return; } while (pkt != NULL) { if (__improbable(pkt->pkt_trace_id != 0)) { KDBG(SK_KTRACE_PKT_RX_DRV | DBG_FUNC_END, pkt->pkt_trace_id); KDBG(SK_KTRACE_PKT_RX_FSW | DBG_FUNC_START, pkt->pkt_trace_id); } next = pkt->pkt_nextpkt; pkt->pkt_nextpkt = NULL; if (__probable((pkt->pkt_qum_qflags & QUM_F_DROPPED) == 0)) { KPKTQ_ENQUEUE(&q, pkt); n_bytes += pkt->pkt_length; } else { DTRACE_SKYWALK1(non__finalized__drop, struct __kern_packet *, pkt); FSW_STATS_INC(FSW_STATS_RX_PKT_NOT_FINALIZED); dp_drop_pkt_single(fsw, pkt, 0, DROP_REASON_FSW_RX_PKT_NOT_FINALIZED, DROPTAP_FLAG_L2_MISSING); pkt = NULL; } n_pkts = KPKTQ_LEN(&q); if (n_pkts == fsw_rx_batch || (next == NULL && n_pkts > 0)) { if (__improbable(fsw->fsw_ifp->if_input_netem != NULL)) { fsw_dev_input_netem_enqueue(fsw, &q); } else { fsw_receive(fsw, &q); } total_pkts += n_pkts; total_bytes += n_bytes; n_pkts = 0; n_bytes = 0; KPKTQ_FINI(&q); } pkt = next; } ASSERT(KPKTQ_LEN(&q) == 0); FSW_STATS_ADD(FSW_STATS_RX_PACKETS, total_pkts); if (out_stats != NULL) { out_stats->nps_pkts += total_pkts; out_stats->nps_bytes += total_bytes; } KDBG(SK_KTRACE_FSW_DEV_RING_FLUSH, SK_KVA(devna), total_pkts, total_bytes); } static int dp_copy_to_dev_mbuf(struct nx_flowswitch *fsw, struct __kern_packet *spkt, struct __kern_packet *dpkt) { struct mbuf *__single m = NULL; uint32_t bdlen, bdlim, bdoff; uint8_t *bdaddr; unsigned int one = 1; int err = 0; err = mbuf_allocpacket(MBUF_DONTWAIT, (fsw->fsw_frame_headroom + spkt->pkt_length), &one, &m); #if (DEVELOPMENT || DEBUG) if (m != NULL) { _FSW_INJECT_ERROR(11, m, NULL, m_freem, m); } #endif /* DEVELOPMENT || DEBUG */ if (__improbable(m == NULL)) { FSW_STATS_INC(FSW_STATS_DROP_NOMEM_MBUF); err = ENOBUFS; goto done; } MD_BUFLET_ADDR_ABS_DLEN(dpkt, bdaddr, bdlen, bdlim, bdoff); if (fsw->fsw_frame_headroom > bdlim) { SK_ERR("not enough space in buffer for headroom"); err = EINVAL; goto done; } dpkt->pkt_headroom = fsw->fsw_frame_headroom; dpkt->pkt_mbuf = m; dpkt->pkt_pflags |= PKT_F_MBUF_DATA; /* packet copy into mbuf */ fsw->fsw_pkt_copy_to_mbuf(NR_TX, SK_PTR_ENCODE(spkt, METADATA_TYPE(spkt), METADATA_SUBTYPE(spkt)), 0, m, fsw->fsw_frame_headroom, spkt->pkt_length, PACKET_HAS_PARTIAL_CHECKSUM(spkt), spkt->pkt_csum_tx_start_off); FSW_STATS_INC(FSW_STATS_TX_COPY_PKT2MBUF); /* header copy into dpkt buffer for classification */ kern_packet_t sph = SK_PTR_ENCODE(spkt, METADATA_TYPE(spkt), METADATA_SUBTYPE(spkt)); kern_packet_t dph = SK_PTR_ENCODE(dpkt, METADATA_TYPE(dpkt), METADATA_SUBTYPE(dpkt)); uint32_t copy_len = MIN(spkt->pkt_length, bdlim - dpkt->pkt_headroom); fsw->fsw_pkt_copy_from_pkt(NR_TX, dph, dpkt->pkt_headroom, sph, spkt->pkt_headroom, copy_len, FALSE, 0, 0, 0); if (copy_len < spkt->pkt_length) { dpkt->pkt_pflags |= PKT_F_TRUNCATED; } /* * fsw->fsw_frame_headroom is after m_data, thus we treat m_data same as * buflet baddr m_data always points to the beginning of packet and * should represents the same as baddr + headroom */ ASSERT((uintptr_t)m->m_data == ((uintptr_t)mbuf_datastart(m) + fsw->fsw_frame_headroom)); done: return err; } static int dp_copy_to_dev_pkt(struct nx_flowswitch *fsw, struct __kern_packet *spkt, struct __kern_packet *dpkt) { struct ifnet *ifp = fsw->fsw_ifp; uint16_t headroom = fsw->fsw_frame_headroom + ifp->if_tx_headroom; if (headroom > UINT8_MAX) { SK_ERR("headroom too large %d", headroom); return ERANGE; } dpkt->pkt_headroom = (uint8_t)headroom; ASSERT((dpkt->pkt_headroom & 0x7) == 0); dpkt->pkt_l2_len = 0; dpkt->pkt_link_flags = spkt->pkt_link_flags; kern_packet_t sph = SK_PTR_ENCODE(spkt, METADATA_TYPE(spkt), METADATA_SUBTYPE(spkt)); kern_packet_t dph = SK_PTR_ENCODE(dpkt, METADATA_TYPE(dpkt), METADATA_SUBTYPE(dpkt)); fsw->fsw_pkt_copy_from_pkt(NR_TX, dph, dpkt->pkt_headroom, sph, spkt->pkt_headroom, spkt->pkt_length, PACKET_HAS_PARTIAL_CHECKSUM(spkt), (spkt->pkt_csum_tx_start_off - spkt->pkt_headroom), (spkt->pkt_csum_tx_stuff_off - spkt->pkt_headroom), (spkt->pkt_csum_flags & PACKET_CSUM_ZERO_INVERT)); FSW_STATS_INC(FSW_STATS_TX_COPY_PKT2PKT); return 0; } #if SK_LOG /* Hoisted out of line to reduce kernel stack footprint */ SK_LOG_ATTRIBUTE static void dp_copy_to_dev_log(struct nx_flowswitch *fsw, const struct kern_pbufpool *pp, struct __kern_packet *spkt, struct __kern_packet *dpkt, int error) { struct proc *p = current_proc(); struct ifnet *ifp = fsw->fsw_ifp; uint64_t logflags = (SK_VERB_FSW_DP | SK_VERB_TX); if (error == ERANGE) { SK_ERR("packet too long, hr(fr+tx)+slen (%u+%u)+%u > " "dev_pp_max %u", (uint32_t)fsw->fsw_frame_headroom, (uint32_t)ifp->if_tx_headroom, spkt->pkt_length, (uint32_t)pp->pp_max_frags * PP_BUF_SIZE_DEF(pp)); } else if (error == ENOBUFS) { SK_DF(logflags, "%s(%d) packet allocation failure", sk_proc_name(p), sk_proc_pid(p)); } else if (error == 0) { ASSERT(dpkt != NULL); char *daddr; uint32_t pkt_len; MD_BUFLET_ADDR_ABS(dpkt, daddr); pkt_len = __packet_get_real_data_length(dpkt); SK_DF(logflags, "%s(%d) splen %u dplen %u hr %u (fr/tx %u/%u)", sk_proc_name(p), sk_proc_pid(p), spkt->pkt_length, dpkt->pkt_length, (uint32_t)dpkt->pkt_headroom, (uint32_t)fsw->fsw_frame_headroom, (uint32_t)ifp->if_tx_headroom); SK_DF(logflags | SK_VERB_DUMP, "%s", sk_dump("buf", daddr, pkt_len, 128)); } else { SK_DF(logflags, "%s(%d) error %d", sk_proc_name(p), sk_proc_pid(p), error); } } #else #define dp_copy_to_dev_log(...) #endif /* SK_LOG */ static void fsw_pkt_copy_metadata(struct __kern_packet *spkt, struct __kern_packet *dpkt) { ASSERT(!(spkt->pkt_pflags & PKT_F_MBUF_MASK)); ASSERT(!(spkt->pkt_pflags & PKT_F_PKT_MASK)); SK_PREFETCHW(dpkt->pkt_qum_buf.buf_addr, 0); /* Copy packet metadata */ _QUM_COPY(&(spkt)->pkt_qum, &(dpkt)->pkt_qum); _PKT_COPY(spkt, dpkt); _PKT_COPY_TX_PORT_DATA(spkt, dpkt); ASSERT((dpkt->pkt_qum.qum_qflags & QUM_F_KERNEL_ONLY) || !PP_KERNEL_ONLY(dpkt->pkt_qum.qum_pp)); ASSERT(dpkt->pkt_mbuf == NULL); /* Copy AQM metadata */ dpkt->pkt_flowsrc_type = spkt->pkt_flowsrc_type; dpkt->pkt_flowsrc_fidx = spkt->pkt_flowsrc_fidx; static_assert((offsetof(struct __flow, flow_src_id) % 8) == 0); _UUID_COPY(dpkt->pkt_flowsrc_id, spkt->pkt_flowsrc_id); _UUID_COPY(dpkt->pkt_policy_euuid, spkt->pkt_policy_euuid); dpkt->pkt_policy_id = spkt->pkt_policy_id; dpkt->pkt_skip_policy_id = spkt->pkt_skip_policy_id; } static int dp_copy_to_dev(struct nx_flowswitch *fsw, struct __kern_packet *spkt, struct __kern_packet *dpkt) { const struct kern_pbufpool *pp = dpkt->pkt_qum.qum_pp; struct ifnet *ifp = fsw->fsw_ifp; uint32_t dev_pkt_len; int err = 0; fsw_pkt_copy_metadata(spkt, dpkt); switch (fsw->fsw_classq_enq_ptype) { case QP_MBUF: err = dp_copy_to_dev_mbuf(fsw, spkt, dpkt); break; case QP_PACKET: dev_pkt_len = fsw->fsw_frame_headroom + ifp->if_tx_headroom + spkt->pkt_length; if (dev_pkt_len > pp->pp_max_frags * PP_BUF_SIZE_DEF(pp)) { FSW_STATS_INC(FSW_STATS_TX_COPY_BAD_LEN); err = ERANGE; goto done; } err = dp_copy_to_dev_pkt(fsw, spkt, dpkt); break; default: VERIFY(0); __builtin_unreachable(); } done: dp_copy_to_dev_log(fsw, pp, spkt, dpkt, err); return err; } static int dp_copy_headers_to_dev(struct nx_flowswitch *fsw, struct __kern_packet *spkt, struct __kern_packet *dpkt) { uint8_t *sbaddr, *dbaddr; uint16_t headroom = fsw->fsw_frame_headroom + fsw->fsw_ifp->if_tx_headroom; uint16_t hdrs_len_estimate = (uint16_t)MIN(spkt->pkt_length, 128); fsw_pkt_copy_metadata(spkt, dpkt); MD_BUFLET_ADDR_ABS(spkt, sbaddr); ASSERT(sbaddr != NULL); sbaddr += spkt->pkt_headroom; MD_BUFLET_ADDR_ABS(dpkt, dbaddr); ASSERT(dbaddr != NULL); dpkt->pkt_headroom = (uint8_t)headroom; dbaddr += headroom; pkt_copy(sbaddr, dbaddr, hdrs_len_estimate); METADATA_SET_LEN(dpkt, hdrs_len_estimate, headroom); /* packet length is set to the full length */ dpkt->pkt_length = spkt->pkt_length; dpkt->pkt_pflags |= PKT_F_TRUNCATED; return 0; } static struct mbuf * convert_pkt_to_mbuf(struct __kern_packet *pkt) { ASSERT(pkt->pkt_pflags & PKT_F_MBUF_DATA); ASSERT(pkt->pkt_mbuf != NULL); struct mbuf *m = pkt->pkt_mbuf; /* pass additional metadata generated from flow parse/lookup */ static_assert(sizeof(m->m_pkthdr.pkt_flowid) == sizeof(pkt->pkt_flow_token)); static_assert(sizeof(m->m_pkthdr.pkt_mpriv_srcid) == sizeof(pkt->pkt_flowsrc_token)); static_assert(sizeof(m->m_pkthdr.pkt_mpriv_fidx) == sizeof(pkt->pkt_flowsrc_fidx)); m->m_pkthdr.pkt_svc = pkt->pkt_svc_class; m->m_pkthdr.pkt_proto = pkt->pkt_flow->flow_ip_proto; m->m_pkthdr.pkt_flowid = pkt->pkt_flow_token; m->m_pkthdr.comp_gencnt = pkt->pkt_comp_gencnt; m->m_pkthdr.pkt_flowsrc = pkt->pkt_flowsrc_type; m->m_pkthdr.pkt_mpriv_srcid = pkt->pkt_flowsrc_token; m->m_pkthdr.pkt_mpriv_fidx = pkt->pkt_flowsrc_fidx; if (pkt->pkt_transport_protocol == IPPROTO_QUIC) { m->m_pkthdr.pkt_ext_flags |= PKTF_EXT_QUIC; } /* The packet should have a timestamp by the time we get here. */ m->m_pkthdr.pkt_timestamp = pkt->pkt_timestamp; m->m_pkthdr.pkt_flags &= ~PKTF_TS_VALID; m->m_pkthdr.pkt_flags &= ~PKT_F_COMMON_MASK; m->m_pkthdr.pkt_flags |= (pkt->pkt_pflags & PKT_F_COMMON_MASK); /* set pkt_hdr so that AQM can find IP header and mark ECN bits */ m->m_pkthdr.pkt_hdr = m_mtod_current(m) + pkt->pkt_l2_len; if ((pkt->pkt_pflags & PKT_F_START_SEQ) != 0) { m->m_pkthdr.tx_start_seq = ntohl(pkt->pkt_flow_tcp_seq); } KPKT_CLEAR_MBUF_DATA(pkt); /* mbuf has been consumed, release packet as well */ ASSERT(pkt->pkt_qum.qum_ksd == NULL); pp_free_packet_single(pkt); return m; } static void convert_pkt_to_mbuf_list(struct __kern_packet *pkt_list, struct mbuf **head, struct mbuf **tail, uint32_t *cnt, uint32_t *bytes) { struct __kern_packet *pkt = pkt_list, *next; struct mbuf *__single m_head = NULL, **__single m_tailp = &m_head; struct mbuf *__single m = NULL; uint32_t c = 0, b = 0; while (pkt != NULL) { next = pkt->pkt_nextpkt; pkt->pkt_nextpkt = NULL; m = convert_pkt_to_mbuf(pkt); ASSERT(m != NULL); *m_tailp = m; m_tailp = &m->m_nextpkt; c++; b += m_pktlen(m); pkt = next; } if (head != NULL) { *head = m_head; } if (tail != NULL) { *tail = m; } if (cnt != NULL) { *cnt = c; } if (bytes != NULL) { *bytes = b; } } SK_NO_INLINE_ATTRIBUTE static int classq_enqueue_flow_single(struct nx_flowswitch *fsw, struct __kern_packet *pkt) { struct ifnet *ifp = fsw->fsw_ifp; boolean_t pkt_drop = FALSE; int err; FSW_LOCK_ASSERT_HELD(fsw); ASSERT(fsw->fsw_classq_enabled); ASSERT(pkt->pkt_flow_token != 0); fsw_ifp_inc_traffic_class_out_pkt(ifp, pkt->pkt_svc_class, 1, pkt->pkt_length); if (__improbable(pkt->pkt_trace_id != 0)) { KDBG(SK_KTRACE_PKT_TX_FSW | DBG_FUNC_END, pkt->pkt_trace_id); KDBG(SK_KTRACE_PKT_TX_AQM | DBG_FUNC_START, pkt->pkt_trace_id); } switch (fsw->fsw_classq_enq_ptype) { case QP_MBUF: { /* compat interface */ struct mbuf *m; m = convert_pkt_to_mbuf(pkt); ASSERT(m != NULL); pkt = NULL; /* ifnet_enqueue consumes mbuf */ err = ifnet_enqueue_mbuf(ifp, m, false, &pkt_drop); m = NULL; #if (DEVELOPMENT || DEBUG) if (__improbable(!pkt_drop)) { _FSW_INJECT_ERROR(14, pkt_drop, TRUE, null_func); } #endif /* DEVELOPMENT || DEBUG */ if (pkt_drop) { FSW_STATS_INC(FSW_STATS_DROP); FSW_STATS_INC(FSW_STATS_TX_AQM_DROP); } break; } case QP_PACKET: { /* native interface */ /* ifnet_enqueue consumes packet */ err = ifnet_enqueue_pkt(ifp, ifp->if_snd, pkt, false, &pkt_drop); pkt = NULL; #if (DEVELOPMENT || DEBUG) if (__improbable(!pkt_drop)) { _FSW_INJECT_ERROR(14, pkt_drop, TRUE, null_func); } #endif /* DEVELOPMENT || DEBUG */ if (pkt_drop) { FSW_STATS_INC(FSW_STATS_DROP); FSW_STATS_INC(FSW_STATS_TX_AQM_DROP); } break; } default: err = EINVAL; VERIFY(0); /* NOTREACHED */ __builtin_unreachable(); } return err; } static int classq_enqueue_flow_chain(struct nx_flowswitch *fsw, struct __kern_packet *pkt_head, struct __kern_packet *pkt_tail, uint32_t cnt, uint32_t bytes) { struct ifnet *ifp = fsw->fsw_ifp; boolean_t pkt_drop = FALSE; uint32_t svc; int err; FSW_LOCK_ASSERT_HELD(fsw); ASSERT(fsw->fsw_classq_enabled); ASSERT(pkt_head->pkt_flow_token != 0); /* * All packets in the flow should have the same svc. */ svc = pkt_head->pkt_svc_class; fsw_ifp_inc_traffic_class_out_pkt(ifp, svc, cnt, bytes); switch (fsw->fsw_classq_enq_ptype) { case QP_MBUF: { /* compat interface */ struct mbuf *__single m_head = NULL, *__single m_tail = NULL; uint32_t c = 0, b = 0; convert_pkt_to_mbuf_list(pkt_head, &m_head, &m_tail, &c, &b); ASSERT(m_head != NULL && m_tail != NULL); ASSERT(c == cnt); ASSERT(b == bytes); pkt_head = NULL; /* ifnet_enqueue consumes mbuf */ err = ifnet_enqueue_mbuf_chain(ifp, m_head, m_tail, cnt, bytes, FALSE, &pkt_drop); m_head = NULL; m_tail = NULL; #if (DEVELOPMENT || DEBUG) if (__improbable(!pkt_drop)) { _FSW_INJECT_ERROR(14, pkt_drop, TRUE, null_func); } #endif /* DEVELOPMENT || DEBUG */ if (pkt_drop) { STATS_ADD(&fsw->fsw_stats, FSW_STATS_DROP, cnt); STATS_ADD(&fsw->fsw_stats, FSW_STATS_TX_AQM_DROP, cnt); } break; } case QP_PACKET: { /* native interface */ /* ifnet_enqueue consumes packet */ err = ifnet_enqueue_pkt_chain(ifp, ifp->if_snd, pkt_head, pkt_tail, cnt, bytes, FALSE, &pkt_drop); pkt_head = NULL; #if (DEVELOPMENT || DEBUG) if (__improbable(!pkt_drop)) { _FSW_INJECT_ERROR(14, pkt_drop, TRUE, null_func); } #endif /* DEVELOPMENT || DEBUG */ if (pkt_drop) { STATS_ADD(&fsw->fsw_stats, FSW_STATS_DROP, cnt); STATS_ADD(&fsw->fsw_stats, FSW_STATS_TX_AQM_DROP, cnt); } break; } default: err = EINVAL; VERIFY(0); /* NOTREACHED */ __builtin_unreachable(); } return err; } /* * This code path needs to be kept for interfaces without logical link support. */ static void classq_enqueue_flow(struct nx_flowswitch *fsw, struct flow_entry *fe, bool chain, uint32_t cnt, uint32_t bytes) { struct __kern_packet *pkt, *tail, *tpkt; flowadv_idx_t flow_adv_idx; bool flowadv_cap; flowadv_token_t flow_adv_token; int err; SK_DF(SK_VERB_FSW_DP | SK_VERB_AQM, "%s classq enqueued %d pkts", if_name(fsw->fsw_ifp), KPKTQ_LEN(&fe->fe_tx_pktq)); if (chain) { pkt = KPKTQ_FIRST(&fe->fe_tx_pktq); tail = KPKTQ_LAST(&fe->fe_tx_pktq); KPKTQ_INIT(&fe->fe_tx_pktq); if (pkt == NULL) { return; } flow_adv_idx = pkt->pkt_flowsrc_fidx; flowadv_cap = ((pkt->pkt_pflags & PKT_F_FLOW_ADV) != 0); flow_adv_token = pkt->pkt_flow_token; err = classq_enqueue_flow_chain(fsw, pkt, tail, cnt, bytes); DTRACE_SKYWALK3(chain__enqueue, uint32_t, cnt, uint32_t, bytes, int, err); } else { uint32_t c = 0, b = 0; KPKTQ_FOREACH_SAFE(pkt, &fe->fe_tx_pktq, tpkt) { KPKTQ_REMOVE(&fe->fe_tx_pktq, pkt); flow_adv_idx = pkt->pkt_flowsrc_fidx; flowadv_cap = ((pkt->pkt_pflags & PKT_F_FLOW_ADV) != 0); flow_adv_token = pkt->pkt_flow_token; c++; b += pkt->pkt_length; err = classq_enqueue_flow_single(fsw, pkt); } ASSERT(c == cnt); ASSERT(b == bytes); DTRACE_SKYWALK3(non__chain__enqueue, uint32_t, cnt, uint32_t, bytes, int, err); } } /* * Logical link code path */ static void classq_qset_enqueue_flow(struct nx_flowswitch *fsw, struct flow_entry *fe, bool chain, uint32_t cnt, uint32_t bytes) { struct __kern_packet *pkt, *tail; flowadv_idx_t flow_adv_idx; bool flowadv_cap; flowadv_token_t flow_adv_token; uint32_t flowctl = 0, dropped = 0; int err; SK_DF(SK_VERB_FSW_DP | SK_VERB_AQM, "%s classq enqueued %d pkts", if_name(fsw->fsw_ifp), KPKTQ_LEN(&fe->fe_tx_pktq)); pkt = KPKTQ_FIRST(&fe->fe_tx_pktq); tail = KPKTQ_LAST(&fe->fe_tx_pktq); KPKTQ_INIT(&fe->fe_tx_pktq); if (pkt == NULL) { return; } flow_adv_idx = pkt->pkt_flowsrc_fidx; flowadv_cap = ((pkt->pkt_pflags & PKT_F_FLOW_ADV) != 0); flow_adv_token = pkt->pkt_flow_token; err = netif_qset_enqueue(fe->fe_qset, chain, pkt, tail, cnt, bytes, &flowctl, &dropped); if (__improbable(err != 0) && dropped > 0) { STATS_ADD(&fsw->fsw_stats, FSW_STATS_DROP, dropped); STATS_ADD(&fsw->fsw_stats, FSW_STATS_TX_AQM_DROP, dropped); } } static void tx_finalize_packet(struct nx_flowswitch *fsw, struct __kern_packet *pkt) { #pragma unused(fsw) /* finalize here; no more changes to buflets after classq */ if (__probable(!(pkt->pkt_pflags & PKT_F_MBUF_DATA))) { kern_packet_t ph = SK_PTR_ENCODE(pkt, METADATA_TYPE(pkt), METADATA_SUBTYPE(pkt)); int err = __packet_finalize(ph); VERIFY(err == 0); } } static bool dp_flow_tx_route_process(struct nx_flowswitch *fsw, struct flow_entry *fe) { struct flow_route *fr = fe->fe_route; int err; ASSERT(fr != NULL); if (__improbable(!dp_flow_route_process(fsw, fe))) { return false; } if (fe->fe_qset_select == FE_QSET_SELECT_DYNAMIC) { flow_qset_select_dynamic(fsw, fe, TRUE); } _FSW_INJECT_ERROR(35, fr->fr_flags, fr->fr_flags, _fsw_error35_handler, 1, fr, NULL, NULL); _FSW_INJECT_ERROR(36, fr->fr_flags, fr->fr_flags, _fsw_error36_handler, 1, fr, NULL); /* * See if we need to resolve the flow route; note the test against * fr_flags here is done without any lock for performance. Thus * it's possible that we race against the thread performing route * event updates for a packet (which is OK). In any case we should * not have any assertion on fr_flags value(s) due to the lack of * serialization. */ if (fr->fr_flags & FLOWRTF_RESOLVED) { goto frame; } struct __kern_packet *pkt, *tpkt; KPKTQ_FOREACH_SAFE(pkt, &fe->fe_tx_pktq, tpkt) { err = fsw->fsw_resolve(fsw, fr, pkt); _FSW_INJECT_ERROR_SET(35, _fsw_error35_handler, 2, fr, pkt, &err); _FSW_INJECT_ERROR_SET(36, _fsw_error36_handler, 2, fr, &err); /* * If resolver returns EJUSTRETURN then we drop the pkt as the * resolver should have converted the pkt into mbuf (or * detached the attached mbuf from pkt) and added it to the * llinfo queue. If we do have a cached llinfo, then proceed * to using it even though it may be stale (very unlikely) * while the resolution is in progress. * Otherwise, any other error results in dropping pkt. */ if (err == EJUSTRETURN) { KPKTQ_REMOVE(&fe->fe_tx_pktq, pkt); pp_free_packet_single(pkt); FSW_STATS_INC(FSW_STATS_TX_RESOLV_PENDING); continue; } else if (err != 0 && (fr->fr_flags & FLOWRTF_HAS_LLINFO)) { /* use existing llinfo */ FSW_STATS_INC(FSW_STATS_TX_RESOLV_STALE); } else if (err != 0) { KPKTQ_REMOVE(&fe->fe_tx_pktq, pkt); dp_drop_pkt_single(fsw, pkt, 1, DROP_REASON_FSW_TX_RESOLV_FAILED, DROPTAP_FLAG_L2_MISSING); FSW_STATS_INC(FSW_STATS_TX_RESOLV_FAIL); continue; } } frame: KPKTQ_FOREACH_SAFE(pkt, &fe->fe_tx_pktq, tpkt) { if (fsw->fsw_frame != NULL) { fsw->fsw_frame(fsw, fr, pkt); } } return true; } static void dp_listener_flow_tx_process(struct nx_flowswitch *fsw, struct flow_entry *fe) { #pragma unused(fsw) struct __kern_packet *pkt, *tpkt; KPKTQ_FOREACH_SAFE(pkt, &fe->fe_tx_pktq, tpkt) { KPKTQ_REMOVE(&fe->fe_tx_pktq, pkt); /* listener is only allowed TCP RST */ if (pkt->pkt_flow_ip_proto == IPPROTO_TCP && (pkt->pkt_flow_tcp_flags & TH_RST) != 0) { flow_track_abort_tcp(fe, NULL, pkt); } else { char *addr; MD_BUFLET_ADDR_ABS(pkt, addr); SK_ERR("listener flow sends non-RST packet %s", sk_dump(sk_proc_name(current_proc()), addr, __packet_get_real_data_length(pkt), 128)); } pp_free_packet_single(pkt); } } static void fsw_update_timestamps(struct __kern_packet *pkt, volatile uint64_t *fg_ts, volatile uint64_t *rt_ts, ifnet_t ifp, uint64_t now) { if (!(pkt->pkt_pflags & PKT_F_TS_VALID) || pkt->pkt_timestamp == 0) { pkt->pkt_timestamp = now; } pkt->pkt_pflags &= ~PKT_F_TS_VALID; /* * If the packet service class is not background, * update the timestamps on the interface, as well as * the ones in nexus-wide advisory to indicate recent * activity on a foreground flow. */ if (!(pkt->pkt_pflags & PKT_F_BACKGROUND)) { ifp->if_fg_sendts = (uint32_t)net_uptime(); if (fg_ts != NULL) { *fg_ts = net_uptime(); } } if (pkt->pkt_pflags & PKT_F_REALTIME) { ifp->if_rt_sendts = (uint32_t)net_uptime(); if (rt_ts != NULL) { *rt_ts = net_uptime(); } } } static bool fsw_chain_enqueue_enabled(struct nx_flowswitch *fsw) { return fsw_chain_enqueue != 0 && fsw->fsw_ifp->if_output_netem == NULL && (fsw->fsw_ifp->if_eflags & IFEF_ENQUEUE_MULTI) == 0; } void dp_flow_tx_process(struct nx_flowswitch *fsw, struct flow_entry *fe, uint32_t flags) { struct pktq dropped_pkts; bool chain, same_svc = true; bool gso = ((flags & FLOW_PROC_FLAG_GSO) != 0); uint32_t cnt = 0, bytes = 0; volatile struct sk_nexusadv *nxadv = NULL; volatile uint64_t *fg_ts = NULL; volatile uint64_t *rt_ts = NULL; uint8_t qset_idx = (fe->fe_qset != NULL) ? fe->fe_qset->nqs_idx : 0; drop_reason_t reason = DROP_REASON_UNSPECIFIED; uint16_t line = 0; uint32_t svc = 0; struct timespec now; uint64_t now_nsec = 0; KPKTQ_INIT(&dropped_pkts); ASSERT(!KPKTQ_EMPTY(&fe->fe_tx_pktq)); if (__improbable(fe->fe_flags & FLOWENTF_LISTENER)) { dp_listener_flow_tx_process(fsw, fe); return; } if (__improbable(!dp_flow_tx_route_process(fsw, fe))) { SK_RDERR(5, "Tx route bad"); FSW_STATS_ADD(FSW_STATS_TX_FLOW_NONVIABLE, KPKTQ_LEN(&fe->fe_tx_pktq)); KPKTQ_CONCAT(&dropped_pkts, &fe->fe_tx_pktq); reason = DROP_REASON_FSW_FLOW_NONVIABLE; line = __LINE__; goto done; } chain = fsw_chain_enqueue_enabled(fsw) && KPKTQ_LEN(&fe->fe_tx_pktq) > 1; if (chain) { nanouptime(&now); net_timernsec(&now, &now_nsec); nxadv = fsw->fsw_nx->nx_adv.flowswitch_nxv_adv; if (nxadv != NULL) { fg_ts = &nxadv->nxadv_fg_sendts; rt_ts = &nxadv->nxadv_rt_sendts; } } struct __kern_packet *pkt, *tpkt; KPKTQ_FOREACH_SAFE(pkt, &fe->fe_tx_pktq, tpkt) { int err = 0; if (svc == 0) { svc = pkt->pkt_svc_class; } err = flow_pkt_track(fe, pkt, false); if (__improbable(err != 0)) { SK_RDERR(5, "flow_pkt_track failed (err %d)", err); FSW_STATS_INC(FSW_STATS_TX_FLOW_TRACK_ERR); KPKTQ_REMOVE(&fe->fe_tx_pktq, pkt); dp_drop_pkt_single(fsw, pkt, 1, DROP_REASON_FSW_FLOW_TRACK_ERR, DROPTAP_FLAG_L2_MISSING); continue; } _UUID_COPY(pkt->pkt_policy_euuid, fe->fe_eproc_uuid); pkt->pkt_transport_protocol = fe->fe_transport_protocol; /* set AQM related values for outgoing packet */ if (fe->fe_adv_idx != FLOWADV_IDX_NONE) { pkt->pkt_pflags |= PKT_F_FLOW_ADV; pkt->pkt_flowsrc_type = FLOWSRC_CHANNEL; pkt->pkt_flowsrc_fidx = fe->fe_adv_idx; } else { pkt->pkt_pflags &= ~PKT_F_FLOW_ADV; } _UUID_CLEAR(pkt->pkt_flow_id); pkt->pkt_flow_token = fe->fe_flowid; pkt->pkt_pflags |= PKT_F_FLOW_ID; pkt->pkt_qset_idx = qset_idx; pkt->pkt_policy_id = fe->fe_policy_id; pkt->pkt_skip_policy_id = fe->fe_skip_policy_id; /* * The same code is exercised per packet for the non-chain case * (see ifnet_enqueue_ifclassq()). It's replicated here to avoid * re-walking the chain later. */ if (chain && (gso || same_svc)) { fsw_update_timestamps(pkt, fg_ts, rt_ts, fsw->fsw_ifp, now_nsec); } /* mark packet tos/svc_class */ fsw_qos_mark(fsw, fe, pkt); tx_finalize_packet(fsw, pkt); bytes += pkt->pkt_length; cnt++; same_svc = (same_svc && (svc == pkt->pkt_svc_class)); /* * we are using the first 4 bytes of flow_id as the AQM flow * identifier. */ ASSERT(!uuid_is_null(pkt->pkt_flow_id)); if (__improbable(pkt->pkt_trace_id != 0)) { KDBG(SK_KTRACE_PKT_TX_FSW | DBG_FUNC_END, pkt->pkt_trace_id); KDBG(SK_KTRACE_PKT_TX_AQM | DBG_FUNC_START, pkt->pkt_trace_id); } } /* snoop after it's finalized */ if (__improbable(pktap_total_tap_count != 0)) { fsw_snoop(fsw, fe, &fe->fe_tx_pktq, false); } chain = chain && (gso || same_svc); if (fe->fe_qset != NULL) { classq_qset_enqueue_flow(fsw, fe, chain, cnt, bytes); } else { classq_enqueue_flow(fsw, fe, chain, cnt, bytes); } done: dp_drop_pktq(fsw, &dropped_pkts, 1, reason, line, 0); } static struct flow_entry * tx_process_continuous_ip_frag(struct nx_flowswitch *fsw, struct flow_entry *prev_fe, struct __kern_packet *pkt) { ASSERT(!pkt->pkt_flow_ip_is_first_frag); if (__improbable(pkt->pkt_flow_ip_frag_id == 0)) { FSW_STATS_INC(FSW_STATS_TX_FRAG_BAD_ID); SK_PERR(current_proc(), "invalid zero fragment id"); return NULL; } SK_PDF(SK_VERB_FSW_DP | SK_VERB_TX, current_proc(), "continuation frag, id %u", pkt->pkt_flow_ip_frag_id); if (__improbable(prev_fe == NULL || !prev_fe->fe_tx_is_cont_frag)) { SK_PERR(current_proc(), "unexpected continuation frag %u", pkt->pkt_flow_ip_frag_id); FSW_STATS_INC(FSW_STATS_TX_FRAG_BAD_CONT); return NULL; } if (__improbable(pkt->pkt_flow_ip_frag_id != prev_fe->fe_tx_frag_id)) { FSW_STATS_INC(FSW_STATS_TX_FRAG_BAD_CONT); SK_PERR(current_proc(), "wrong continuation frag id %u expecting %u", pkt->pkt_flow_ip_frag_id, prev_fe->fe_tx_frag_id); return NULL; } return prev_fe; } static struct flow_entry * tx_lookup_flow(struct nx_flowswitch *fsw, struct __kern_packet *pkt, struct flow_entry *prev_fe) { SK_LOG_VAR(char dbgbuf[FLOWENTRY_DBGBUF_SIZE]); struct flow_entry *__single fe; fe = lookup_flow_with_pkt(fsw, pkt, false, prev_fe); if (__improbable(fe == NULL)) { goto done; } if (__improbable(fe->fe_flags & FLOWENTF_TORN_DOWN)) { SK_RDERR(5, "Tx flow torn down %s", fe2str(fe, dbgbuf, sizeof(dbgbuf))); FSW_STATS_INC(FSW_STATS_TX_FLOW_TORNDOWN); flow_entry_release(&fe); goto done; } if (__improbable(fe->fe_flags & FLOWENTF_AOP_OFFLOAD)) { SK_RDERR(5, "Tx not allowed for this flow"); SK_RDERR(5, "Tx not allowed for this flow %s", fe2str(fe, dbgbuf, sizeof(dbgbuf))); FSW_STATS_INC(FSW_STATS_TX_DISABLED); flow_entry_release(&fe); goto done; } _FSW_INJECT_ERROR(34, pkt->pkt_flow_id[0], fe->fe_uuid[0] + 1, null_func); if (__improbable(!_UUID_MATCH(pkt->pkt_flow_id, fe->fe_uuid))) { uuid_string_t flow_id_str, pkt_id_str; sk_uuid_unparse(fe->fe_uuid, flow_id_str); sk_uuid_unparse(pkt->pkt_flow_id, pkt_id_str); SK_ERR("pkt flow id %s != flow id %s, %s", pkt_id_str, flow_id_str, fe2str(fe, dbgbuf, sizeof(dbgbuf))); flow_entry_release(&fe); FSW_STATS_INC(FSW_STATS_TX_FLOW_BAD_ID); } done: return fe; } static inline void tx_flow_process(struct nx_flowswitch *fsw, struct flow_entry *fe, uint32_t flags) { ASSERT(!KPKTQ_EMPTY(&fe->fe_tx_pktq)); ASSERT(KPKTQ_LEN(&fe->fe_tx_pktq) != 0); SK_DF(SK_VERB_FSW_DP | SK_VERB_TX, "TX %d pkts from fe %p port %d", KPKTQ_LEN(&fe->fe_tx_pktq), fe, fe->fe_nx_port); /* flow related processing (default, agg, etc.) */ fe->fe_tx_process(fsw, fe, flags); KPKTQ_FINI(&fe->fe_tx_pktq); } #if SK_LOG static void dp_tx_log_pkt(uint64_t verb, char *desc, struct __kern_packet *pkt) { char *pkt_buf; uint32_t pkt_len; MD_BUFLET_ADDR_ABS(pkt, pkt_buf); pkt_len = __packet_get_real_data_length(pkt); SK_DF(verb, "%s(%d) %s %s", sk_proc_name(current_proc()), sk_proc_pid(current_proc()), desc, sk_dump("buf", pkt_buf, pkt_len, 128)); } #else /* !SK_LOG */ #define dp_tx_log_pkt(...) #endif /* !SK_LOG */ static inline struct ifnet * fsw_datamov_begin(struct nx_flowswitch *fsw) { struct ifnet *ifp; ifp = fsw->fsw_ifp; if (!ifnet_datamov_begin(ifp)) { DTRACE_SKYWALK1(ifnet__detached, struct ifnet *, ifp); return NULL; } return ifp; } static inline void fsw_datamov_end(struct nx_flowswitch *fsw) { ifnet_datamov_end(fsw->fsw_ifp); } static void dp_tx_pktq(struct nx_flowswitch *fsw, struct pktq *spktq) { struct __kern_packet *spkt, *pkt; struct flow_entry_list fes = TAILQ_HEAD_INITIALIZER(fes); struct flow_entry *__single fe, *__single prev_fe; struct pktq dropped_pkts, dpktq; struct nexus_adapter *dev_na; struct kern_pbufpool *dev_pp; struct ifnet *ifp = NULL; sa_family_t af; uint32_t n_pkts, n_flows = 0; boolean_t do_pacing = FALSE; drop_reason_t reason = DROP_REASON_UNSPECIFIED; uint16_t line = 0; int err; KPKTQ_INIT(&dpktq); KPKTQ_INIT(&dropped_pkts); n_pkts = KPKTQ_LEN(spktq); FSW_RLOCK(fsw); if (__improbable(FSW_QUIESCED(fsw))) { DTRACE_SKYWALK1(tx__quiesced, struct nx_flowswitch *, fsw); SK_ERR("flowswitch detached, dropping %d pkts", n_pkts); KPKTQ_CONCAT(&dropped_pkts, spktq); reason = DROP_REASON_FSW_QUIESCED; line = __LINE__; goto done; } dev_na = fsw->fsw_dev_ch->ch_na; if (__improbable(dev_na == NULL)) { SK_ERR("dev port not attached, dropping %d pkts", n_pkts); FSW_STATS_ADD(FSW_STATS_DST_NXPORT_INACTIVE, n_pkts); KPKTQ_CONCAT(&dropped_pkts, spktq); reason = DROP_REASON_FSW_TX_DEVPORT_NOT_ATTACHED; line = __LINE__; goto done; } ifp = fsw_datamov_begin(fsw); if (ifp == NULL) { SK_ERR("ifnet not attached, dropping %d pkts", n_pkts); KPKTQ_CONCAT(&dropped_pkts, spktq); reason = DROP_REASON_FSW_IFNET_NOT_ATTACHED; line = __LINE__; goto done; } /* batch allocate enough packets */ dev_pp = na_kr_get_pp(dev_na, NR_TX); err = pp_alloc_pktq(dev_pp, dev_pp->pp_max_frags, &dpktq, n_pkts, NULL, NULL, SKMEM_NOSLEEP); #if DEVELOPMENT || DEBUG if (__probable(err != ENOMEM)) { _FSW_INJECT_ERROR(12, err, ENOMEM, pp_free_pktq, &dpktq); } #endif /* DEVELOPMENT || DEBUG */ if (__improbable(err == ENOMEM)) { ASSERT(KPKTQ_EMPTY(&dpktq)); KPKTQ_CONCAT(&dropped_pkts, spktq); FSW_STATS_ADD(FSW_STATS_DROP_NOMEM_PKT, n_pkts); SK_ERR("failed to alloc %u pkts from device pool", n_pkts); reason = DROP_REASON_FSW_PP_ALLOC_FAILED; line = __LINE__; goto done; } else if (__improbable(err == EAGAIN)) { FSW_STATS_ADD(FSW_STATS_DROP_NOMEM_PKT, (n_pkts - KPKTQ_LEN(&dpktq))); FSW_STATS_ADD(FSW_STATS_DROP, (n_pkts - KPKTQ_LEN(&dpktq))); } n_pkts = KPKTQ_LEN(&dpktq); prev_fe = NULL; KPKTQ_FOREACH(spkt, spktq) { if (n_pkts == 0) { break; } --n_pkts; KPKTQ_DEQUEUE(&dpktq, pkt); ASSERT(pkt != NULL); err = dp_copy_to_dev(fsw, spkt, pkt); if (__improbable(err != 0)) { /* * Copy to dev pool failed, so droptap should capture * the source pkt because dev pkt might not have metadata * or buffer filled out yet. Source pkt is freed by * fsw_user_ring_flush, so defer the free to that. */ dp_drop_pkt_single_nofree(fsw, spkt, 1, DROP_REASON_FSW_PKT_COPY_FAILED, DROPTAP_FLAG_L2_MISSING); /* Free the dev pool packet */ pp_free_packet_single(pkt); continue; } do_pacing |= __packet_get_tx_timestamp(SK_PKT2PH(pkt)) != 0; af = fsw_ip_demux(fsw, pkt); if (__improbable(af == AF_UNSPEC)) { dp_tx_log_pkt(SK_VERB_ERROR, "demux err", pkt); FSW_STATS_INC(FSW_STATS_TX_DEMUX_ERR); dp_drop_pkt_single(fsw, pkt, 1, DROP_REASON_FSW_DEMUX_FAILED, DROPTAP_FLAG_L2_MISSING); continue; } err = flow_pkt_classify(pkt, ifp, af, false); if (__improbable(err != 0)) { dp_tx_log_pkt(SK_VERB_ERROR, "flow extract err", pkt); FSW_STATS_INC(FSW_STATS_TX_FLOW_EXTRACT_ERR); dp_drop_pkt_single(fsw, pkt, 1, DROP_REASON_FSW_TX_FLOW_EXTRACT_FAILED, DROPTAP_FLAG_L2_MISSING); continue; } if (__improbable(pkt->pkt_flow_ip_is_frag && !pkt->pkt_flow_ip_is_first_frag)) { fe = tx_process_continuous_ip_frag(fsw, prev_fe, pkt); if (__probable(fe != NULL)) { flow_entry_retain(fe); goto flow_batch; } else { FSW_STATS_INC(FSW_STATS_TX_FRAG_BAD_CONT); dp_drop_pkt_single(fsw, pkt, 1, DROP_REASON_FSW_TX_FRAG_BAD_CONT, DROPTAP_FLAG_L2_MISSING); continue; } } fe = tx_lookup_flow(fsw, pkt, prev_fe); if (__improbable(fe == NULL)) { FSW_STATS_INC(FSW_STATS_TX_FLOW_NOT_FOUND); dp_drop_pkt_single(fsw, pkt, 1, DROP_REASON_FSW_TX_FLOW_NOT_FOUND, DROPTAP_FLAG_L2_MISSING); prev_fe = NULL; continue; } flow_batch: tx_flow_batch_packet(&fes, fe, pkt); prev_fe = fe; } struct flow_entry *tfe = NULL; TAILQ_FOREACH_SAFE(fe, &fes, fe_tx_link, tfe) { tx_flow_process(fsw, fe, 0); TAILQ_REMOVE(&fes, fe, fe_tx_link); fe->fe_tx_is_cont_frag = false; fe->fe_tx_frag_id = 0; flow_entry_release(&fe); n_flows++; } done: FSW_RUNLOCK(fsw); if (n_flows > 0) { netif_transmit(ifp, NETIF_XMIT_FLAG_CHANNEL | (do_pacing ? NETIF_XMIT_FLAG_PACING : 0)); } if (ifp != NULL) { fsw_datamov_end(fsw); } dp_drop_pktq(fsw, &dropped_pkts, 1, reason, line, DROPTAP_FLAG_L2_MISSING); KPKTQ_FINI(&dropped_pkts); KPKTQ_FINI(&dpktq); } static sa_family_t get_tso_af(struct __kern_packet *pkt) { packet_tso_flags_t tso_flags; tso_flags = pkt->pkt_csum_flags & PACKET_CSUM_TSO_FLAGS; if (tso_flags == PACKET_TSO_IPV4) { return AF_INET; } else if (tso_flags == PACKET_TSO_IPV6) { return AF_INET6; } else { panic("invalid tso flags: 0x%x\n", tso_flags); /* NOTREACHED */ __builtin_unreachable(); } } static inline void update_flow_info(struct __kern_packet *pkt, void *iphdr, void *tcphdr, uint16_t payload_sz) { struct tcphdr *__single tcp = tcphdr; DTRACE_SKYWALK4(update__flow__info, struct __kern_packet *, pkt, void *, iphdr, void *, tcphdr, uint16_t, payload_sz); pkt->pkt_flow_ip_hdr = (mach_vm_address_t)iphdr; pkt->pkt_flow_tcp_hdr = (mach_vm_address_t)tcphdr; pkt->pkt_flow_tcp_flags = tcp->th_flags; pkt->pkt_flow_tcp_seq = tcp->th_seq; pkt->pkt_flow_ulen = payload_sz; } static int do_gso(struct nx_flowswitch *fsw, int af, struct __kern_packet *orig_pkt, struct __kern_packet *first_pkt, struct pktq *dev_pktq, struct pktq *gso_pktq) { ifnet_t ifp = fsw->fsw_ifp; struct __kern_packet *pkt = first_pkt; uint8_t proto = pkt->pkt_flow_ip_proto; uint16_t ip_hlen = pkt->pkt_flow_ip_hlen; uint16_t tcp_hlen = pkt->pkt_flow_tcp_hlen; uint16_t total_hlen = ip_hlen + tcp_hlen; uint16_t mtu = (uint16_t)ifp->if_mtu; uint16_t mss = pkt->pkt_proto_seg_sz, payload_sz; uint32_t n, n_pkts, off = 0, total_len = orig_pkt->pkt_length; uint16_t headroom = fsw->fsw_frame_headroom + ifp->if_tx_headroom; kern_packet_t orig_ph = SK_PKT2PH(orig_pkt); uint8_t *orig_pkt_baddr; struct tcphdr *tcp; struct ip *ip; struct ip6_hdr *ip6; uint32_t tcp_seq; uint16_t ipid; uint32_t pseudo_hdr_csum, bufsz; uint64_t pkt_tx_timestamp = 0; ASSERT(headroom <= UINT8_MAX); if (proto != IPPROTO_TCP) { SK_ERR("invalid proto: %d", proto); DTRACE_SKYWALK3(invalid__proto, struct nx_flowswitch *, fsw, ifnet_t, ifp, uint8_t, proto); return EINVAL; } if (mss == 0 || mss > (mtu - total_hlen)) { SK_ERR("invalid args: mss %d, mtu %d, total_hlen %d", mss, mtu, total_hlen); DTRACE_SKYWALK5(invalid__args1, struct nx_flowswitch *, fsw, ifnet_t, ifp, uint16_t, mss, uint16_t, mtu, uint32_t, total_hlen); return EINVAL; } bufsz = PP_BUF_SIZE_DEF(pkt->pkt_qum.qum_pp); if ((headroom + total_hlen + mss) > bufsz) { SK_ERR("invalid args: headroom %d, total_hlen %d, " "mss %d, bufsz %d", headroom, total_hlen, mss, bufsz); DTRACE_SKYWALK6(invalid__args2, struct nx_flowswitch *, fsw, ifnet_t, ifp, uint16_t, headroom, uint16_t, total_hlen, uint16_t, mss, uint32_t, bufsz); return EINVAL; } n_pkts = (uint32_t)(SK_ROUNDUP((total_len - total_hlen), mss) / mss); ASSERT(pkt->pkt_headroom == headroom); ASSERT(pkt->pkt_length == total_len); ASSERT(pkt->pkt_l2_len == 0); ASSERT((pkt->pkt_qum.qum_qflags & QUM_F_FINALIZED) == 0); ASSERT((pkt->pkt_pflags & PKT_F_TRUNCATED) != 0); pkt->pkt_pflags &= ~PKT_F_TRUNCATED; pkt->pkt_proto_seg_sz = 0; pkt->pkt_csum_flags = 0; MD_BUFLET_ADDR_ABS(orig_pkt, orig_pkt_baddr); orig_pkt_baddr += orig_pkt->pkt_headroom; if (af == AF_INET) { /* * XXX -fbounds-safety: can't avoid using forge unless we change * the flow metadata definition. */ ip = __unsafe_forge_bidi_indexable(struct ip *, pkt->pkt_flow_ip_hdr, pkt->pkt_length); tcp = __unsafe_forge_bidi_indexable(struct tcphdr *, pkt->pkt_flow_tcp_hdr, pkt->pkt_length - ip_hlen); ipid = ip->ip_id; pseudo_hdr_csum = in_pseudo(pkt->pkt_flow_ipv4_src.s_addr, pkt->pkt_flow_ipv4_dst.s_addr, 0); } else { ASSERT(af == AF_INET6); tcp = __unsafe_forge_bidi_indexable(struct tcphdr *, pkt->pkt_flow_tcp_hdr, pkt->pkt_length - ip_hlen); pseudo_hdr_csum = in6_pseudo(&pkt->pkt_flow_ipv6_src, &pkt->pkt_flow_ipv6_dst, 0); } tcp_seq = ntohl(tcp->th_seq); pkt_tx_timestamp = __packet_get_tx_timestamp(orig_ph); for (n = 1, payload_sz = mss, off = total_hlen; off < total_len; off += payload_sz) { uint8_t *baddr, *baddr0; uint32_t partial; if (pkt == NULL) { n++; KPKTQ_DEQUEUE(dev_pktq, pkt); ASSERT(pkt != NULL); } MD_BUFLET_ADDR_ABS(pkt, baddr0); baddr = baddr0; baddr += headroom; /* Copy headers from the original packet */ if (n != 1) { ASSERT(pkt != first_pkt); pkt_copy(orig_pkt_baddr, baddr, total_hlen); fsw_pkt_copy_metadata(first_pkt, pkt); ASSERT((pkt->pkt_qum_qflags & QUM_F_FLOW_CLASSIFIED) != 0); /* flow info still needs to be updated below */ bcopy(first_pkt->pkt_flow, pkt->pkt_flow, sizeof(*pkt->pkt_flow)); pkt->pkt_trace_id = 0; ASSERT(pkt->pkt_headroom == headroom); } else { METADATA_SET_LEN(pkt, 0, 0); } baddr += total_hlen; /* copy tx timestamp from the orignal packet */ __packet_set_tx_timestamp(SK_PKT2PH(pkt), pkt_tx_timestamp); /* Copy/checksum the payload from the original packet */ if (off + payload_sz > total_len) { payload_sz = (uint16_t)(total_len - off); } pkt_copypkt_sum(orig_ph, (uint16_t)(orig_pkt->pkt_headroom + off), SK_PKT2PH(pkt), headroom + total_hlen, payload_sz, &partial, TRUE); DTRACE_SKYWALK6(copy__csum, struct nx_flowswitch *, fsw, ifnet_t, ifp, uint8_t *, baddr, uint16_t, payload_sz, uint16_t, mss, uint32_t, partial); FSW_STATS_INC(FSW_STATS_TX_COPY_PKT2PKT); /* * Adjust header information and fill in the missing fields. */ if (af == AF_INET) { ip = (struct ip *)(void *)(baddr0 + pkt->pkt_headroom); tcp = (struct tcphdr *)(void *)((caddr_t)ip + ip_hlen); if (n != n_pkts) { tcp->th_flags &= ~(TH_FIN | TH_PUSH); } if (n != 1) { tcp->th_flags &= ~TH_CWR; tcp->th_seq = htonl(tcp_seq); } update_flow_info(pkt, ip, tcp, payload_sz); ip->ip_id = htons((ipid)++); ip->ip_len = htons(ip_hlen + tcp_hlen + payload_sz); ip->ip_sum = 0; ip->ip_sum = inet_cksum_buffer(ip, 0, 0, ip_hlen); tcp->th_sum = 0; partial = __packet_cksum(tcp, tcp_hlen, partial); partial += htons(tcp_hlen + IPPROTO_TCP + payload_sz); partial += pseudo_hdr_csum; ADDCARRY(partial); tcp->th_sum = ~(uint16_t)partial; } else { ASSERT(af == AF_INET6); ip6 = (struct ip6_hdr *)(baddr0 + pkt->pkt_headroom); tcp = (struct tcphdr *)(void *)((caddr_t)ip6 + ip_hlen); if (n != n_pkts) { tcp->th_flags &= ~(TH_FIN | TH_PUSH); } if (n != 1) { tcp->th_flags &= ~TH_CWR; tcp->th_seq = htonl(tcp_seq); } update_flow_info(pkt, ip6, tcp, payload_sz); ip6->ip6_plen = htons(tcp_hlen + payload_sz); tcp->th_sum = 0; partial = __packet_cksum(tcp, tcp_hlen, partial); partial += htonl(tcp_hlen + IPPROTO_TCP + payload_sz); partial += pseudo_hdr_csum; ADDCARRY(partial); tcp->th_sum = ~(uint16_t)partial; } tcp_seq += payload_sz; METADATA_ADJUST_LEN(pkt, total_hlen, headroom); #if (DEVELOPMENT || DEBUG) struct __kern_buflet *bft; uint32_t blen; PKT_GET_FIRST_BUFLET(pkt, 1, bft); blen = __buflet_get_data_length(bft); if (blen != total_hlen + payload_sz) { panic("blen (%d) != total_len + payload_sz (%d)\n", blen, total_hlen + payload_sz); } #endif /* DEVELOPMENT || DEBUG */ pkt->pkt_length = total_hlen + payload_sz; KPKTQ_ENQUEUE(gso_pktq, pkt); pkt = NULL; /* * Note that at this point the packet is not yet finalized. * The finalization happens in dp_flow_tx_process() after * the framing is done. */ } ASSERT(n == n_pkts); ASSERT(off == total_len); DTRACE_SKYWALK7(gso__done, struct nx_flowswitch *, fsw, ifnet_t, ifp, uint32_t, n_pkts, uint32_t, total_len, uint16_t, ip_hlen, uint16_t, tcp_hlen, uint8_t *, orig_pkt_baddr); return 0; } static void tx_flow_enqueue_gso_pktq(struct flow_entry_list *fes, struct flow_entry *fe, struct pktq *gso_pktq) { if (KPKTQ_EMPTY(&fe->fe_tx_pktq)) { ASSERT(KPKTQ_LEN(&fe->fe_tx_pktq) == 0); TAILQ_INSERT_TAIL(fes, fe, fe_tx_link); KPKTQ_ENQUEUE_MULTI(&fe->fe_tx_pktq, KPKTQ_FIRST(gso_pktq), KPKTQ_LAST(gso_pktq), KPKTQ_LEN(gso_pktq)); KPKTQ_INIT(gso_pktq); } else { ASSERT(!TAILQ_EMPTY(fes)); KPKTQ_ENQUEUE_MULTI(&fe->fe_tx_pktq, KPKTQ_FIRST(gso_pktq), KPKTQ_LAST(gso_pktq), KPKTQ_LEN(gso_pktq)); KPKTQ_INIT(gso_pktq); flow_entry_release(&fe); } } static void dp_gso_pktq(struct nx_flowswitch *fsw, struct pktq *spktq, uint32_t gso_pkts_estimate) { struct __kern_packet *spkt, *pkt; struct flow_entry_list fes = TAILQ_HEAD_INITIALIZER(fes); struct flow_entry *__single fe, *__single prev_fe; struct pktq dpktq; struct nexus_adapter *dev_na; struct kern_pbufpool *dev_pp; struct ifnet *ifp = NULL; sa_family_t af; uint32_t n_pkts, n_flows = 0; int err; KPKTQ_INIT(&dpktq); n_pkts = KPKTQ_LEN(spktq); FSW_RLOCK(fsw); if (__improbable(FSW_QUIESCED(fsw))) { DTRACE_SKYWALK1(tx__quiesced, struct nx_flowswitch *, fsw); SK_ERR("flowswitch detached, dropping %d pkts", n_pkts); dp_drop_pktq(fsw, spktq, 1, DROP_REASON_FSW_QUIESCED, __LINE__, DROPTAP_FLAG_L2_MISSING); goto done; } dev_na = fsw->fsw_dev_ch->ch_na; if (__improbable(dev_na == NULL)) { SK_ERR("dev port not attached, dropping %d pkts", n_pkts); FSW_STATS_ADD(FSW_STATS_DST_NXPORT_INACTIVE, n_pkts); dp_drop_pktq(fsw, spktq, 1, DROP_REASON_FSW_TX_DEVPORT_NOT_ATTACHED, __LINE__, DROPTAP_FLAG_L2_MISSING); goto done; } ifp = fsw_datamov_begin(fsw); if (ifp == NULL) { SK_ERR("ifnet not attached, dropping %d pkts", n_pkts); dp_drop_pktq(fsw, spktq, 1, DROP_REASON_FSW_IFNET_NOT_ATTACHED, __LINE__, DROPTAP_FLAG_L2_MISSING); goto done; } dev_pp = na_kr_get_pp(dev_na, NR_TX); /* * Batch allocate enough packets to perform GSO on all * packets in spktq. */ err = pp_alloc_pktq(dev_pp, dev_pp->pp_max_frags, &dpktq, gso_pkts_estimate, NULL, NULL, SKMEM_NOSLEEP); #if DEVELOPMENT || DEBUG if (__probable(err != ENOMEM)) { _FSW_INJECT_ERROR(12, err, ENOMEM, pp_free_pktq, &dpktq); } #endif /* DEVELOPMENT || DEBUG */ /* * We either get all packets or none. No partial allocations. */ if (__improbable(err != 0)) { if (err == ENOMEM) { ASSERT(KPKTQ_EMPTY(&dpktq)); } else { dp_free_pktq(fsw, &dpktq); } DTRACE_SKYWALK1(gso__no__mem, int, err); dp_drop_pktq(fsw, spktq, 1, DROP_REASON_FSW_PP_ALLOC_FAILED, __LINE__, DROPTAP_FLAG_L2_MISSING); FSW_STATS_ADD(FSW_STATS_DROP_NOMEM_PKT, n_pkts); SK_ERR("failed to alloc %u pkts from device pool", gso_pkts_estimate); goto done; } prev_fe = NULL; KPKTQ_FOREACH(spkt, spktq) { KPKTQ_DEQUEUE(&dpktq, pkt); ASSERT(pkt != NULL); /* * Copy only headers to the first packet of the GSO chain. * The headers will be used for classification below. */ err = dp_copy_headers_to_dev(fsw, spkt, pkt); if (__improbable(err != 0)) { dp_drop_pkt_single(fsw, pkt, 1, DROP_REASON_FSW_PKT_COPY_FAILED, DROPTAP_FLAG_L2_MISSING); DTRACE_SKYWALK2(copy__headers__failed, struct nx_flowswitch *, fsw, struct __kern_packet *, spkt); continue; } af = get_tso_af(pkt); ASSERT(af == AF_INET || af == AF_INET6); err = flow_pkt_classify(pkt, ifp, af, false); if (__improbable(err != 0)) { dp_tx_log_pkt(SK_VERB_ERROR, "flow extract err", pkt); FSW_STATS_INC(FSW_STATS_TX_FLOW_EXTRACT_ERR); dp_drop_pkt_single(fsw, pkt, 1, DROP_REASON_FSW_TX_FLOW_EXTRACT_FAILED, DROPTAP_FLAG_L2_MISSING); DTRACE_SKYWALK4(classify__failed, struct nx_flowswitch *, fsw, struct __kern_packet *, spkt, struct __kern_packet *, pkt, int, err); continue; } /* * GSO cannot be done on a fragment and it's a bug in user * space to mark a fragment as needing GSO. */ if (__improbable(pkt->pkt_flow_ip_is_frag)) { FSW_STATS_INC(FSW_STATS_TX_FRAG_BAD_CONT); dp_drop_pkt_single(fsw, pkt, 1, DROP_REASON_FSW_TX_FRAG_BAD_CONT, DROPTAP_FLAG_L2_MISSING); DTRACE_SKYWALK3(is__frag, struct nx_flowswitch *, fsw, struct __kern_packet *, spkt, struct __kern_packet *, pkt); continue; } fe = tx_lookup_flow(fsw, pkt, prev_fe); if (__improbable(fe == NULL)) { FSW_STATS_INC(FSW_STATS_TX_FLOW_NOT_FOUND); dp_drop_pkt_single(fsw, pkt, 1, DROP_REASON_FSW_TX_FLOW_NOT_FOUND, DROPTAP_FLAG_L2_MISSING); DTRACE_SKYWALK3(lookup__failed, struct nx_flowswitch *, fsw, struct __kern_packet *, spkt, struct __kern_packet *, pkt); prev_fe = NULL; continue; } /* * Perform GSO on spkt using the flow information * obtained above. */ struct pktq gso_pktq; KPKTQ_INIT(&gso_pktq); err = do_gso(fsw, af, spkt, pkt, &dpktq, &gso_pktq); if (__probable(err == 0)) { tx_flow_enqueue_gso_pktq(&fes, fe, &gso_pktq); prev_fe = fe; } else { DTRACE_SKYWALK1(gso__error, int, err); /* TODO: increment error stat */ dp_drop_pkt_single(fsw, pkt, 1, DROP_REASON_FSW_GSO_FAILED, DROPTAP_FLAG_L2_MISSING); flow_entry_release(&fe); prev_fe = NULL; } KPKTQ_FINI(&gso_pktq); } struct flow_entry *tfe = NULL; TAILQ_FOREACH_SAFE(fe, &fes, fe_tx_link, tfe) { /* Chain-enqueue can be used for GSO chains */ tx_flow_process(fsw, fe, FLOW_PROC_FLAG_GSO); TAILQ_REMOVE(&fes, fe, fe_tx_link); flow_entry_release(&fe); n_flows++; } done: FSW_RUNLOCK(fsw); if (n_flows > 0) { netif_transmit(ifp, NETIF_XMIT_FLAG_CHANNEL); } if (ifp != NULL) { fsw_datamov_end(fsw); } /* * It's possible for packets to be left in dpktq because * gso_pkts_estimate is only an estimate. The actual number * of packets needed could be less. */ uint32_t dpktq_len; if ((dpktq_len = KPKTQ_LEN(&dpktq)) > 0) { DTRACE_SKYWALK2(leftover__dev__pkts, struct nx_flowswitch *, fsw, uint32_t, dpktq_len); dp_free_pktq(fsw, &dpktq); } KPKTQ_FINI(&dpktq); } static inline void fsw_dev_ring_flush(struct nx_flowswitch *fsw, struct __kern_channel_ring *r, struct proc *p) { #pragma unused(p) uint32_t total_pkts = 0, total_bytes = 0; for (;;) { struct pktq pktq; KPKTQ_INIT(&pktq); uint32_t n_bytes; fsw_rx_ring_dequeue_pktq(fsw, r, fsw_rx_batch, &pktq, &n_bytes); if (n_bytes == 0) { break; } total_pkts += KPKTQ_LEN(&pktq); total_bytes += n_bytes; if (__probable(fsw->fsw_ifp->if_input_netem == NULL)) { fsw_receive(fsw, &pktq); } else { fsw_dev_input_netem_enqueue(fsw, &pktq); } KPKTQ_FINI(&pktq); } KDBG(SK_KTRACE_FSW_DEV_RING_FLUSH, SK_KVA(r), total_pkts, total_bytes); DTRACE_SKYWALK2(fsw__dp__dev__ring__flush, uint32_t, total_pkts, uint32_t, total_bytes); /* compute mitigation rate for delivered traffic */ if (__probable(r->ckr_netif_mit_stats != NULL)) { r->ckr_netif_mit_stats(r, total_pkts, total_bytes); } } static inline void fsw_user_ring_flush(struct nx_flowswitch *fsw, struct __kern_channel_ring *r, struct proc *p) { #pragma unused(p) static packet_trace_id_t trace_id = 0; uint32_t total_pkts = 0, total_bytes = 0; for (;;) { struct pktq pktq; KPKTQ_INIT(&pktq); uint32_t n_bytes; uint32_t gso_pkts_estimate = 0; fsw_tx_ring_dequeue_pktq(fsw, r, fsw_tx_batch, &pktq, &n_bytes, &gso_pkts_estimate); if (n_bytes == 0) { break; } total_pkts += KPKTQ_LEN(&pktq); total_bytes += n_bytes; KPKTQ_FIRST(&pktq)->pkt_trace_id = ++trace_id; KDBG(SK_KTRACE_PKT_TX_FSW | DBG_FUNC_START, KPKTQ_FIRST(&pktq)->pkt_trace_id); if (gso_pkts_estimate > 0) { dp_gso_pktq(fsw, &pktq, gso_pkts_estimate); } else { dp_tx_pktq(fsw, &pktq); } dp_free_pktq(fsw, &pktq); KPKTQ_FINI(&pktq); } kr_update_stats(r, total_pkts, total_bytes); KDBG(SK_KTRACE_FSW_USER_RING_FLUSH, SK_KVA(r), total_pkts, total_bytes); DTRACE_SKYWALK2(fsw__dp__user__ring__flush, uint32_t, total_pkts, uint32_t, total_bytes); } void fsw_ring_flush(struct nx_flowswitch *fsw, struct __kern_channel_ring *r, struct proc *p) { struct nexus_vp_adapter *vpna = VPNA(KRNA(r)); ASSERT(sk_is_sync_protected()); ASSERT(vpna->vpna_nx_port != FSW_VP_HOST); ASSERT(vpna->vpna_up.na_md_type == NEXUS_META_TYPE_PACKET); if (vpna->vpna_nx_port == FSW_VP_DEV) { fsw_dev_ring_flush(fsw, r, p); } else { fsw_user_ring_flush(fsw, r, p); } } int fsw_dp_ctor(struct nx_flowswitch *fsw) { uint32_t fe_cnt = fsw_fe_table_size; uint32_t fob_cnt = fsw_flow_owner_buckets; uint32_t frb_cnt = fsw_flow_route_buckets; uint32_t frib_cnt = fsw_flow_route_id_buckets; struct kern_nexus *nx = fsw->fsw_nx; char name[64]; const char *__null_terminated fsw_name = NULL; int error = 0; /* just in case */ if (fe_cnt == 0) { fe_cnt = NX_FSW_FE_TABLESZ; ASSERT(fe_cnt != 0); } if (fob_cnt == 0) { fob_cnt = NX_FSW_FOB_HASHSZ; ASSERT(fob_cnt != 0); } if (frb_cnt == 0) { frb_cnt = NX_FSW_FRB_HASHSZ; ASSERT(frb_cnt != 0); } if (frib_cnt == 0) { frib_cnt = NX_FSW_FRIB_HASHSZ; ASSERT(frib_cnt != 0); } /* make sure fe_cnt is a power of two, else round up */ if ((fe_cnt & (fe_cnt - 1)) != 0) { fe_cnt--; fe_cnt |= (fe_cnt >> 1); fe_cnt |= (fe_cnt >> 2); fe_cnt |= (fe_cnt >> 4); fe_cnt |= (fe_cnt >> 8); fe_cnt |= (fe_cnt >> 16); fe_cnt++; } /* make sure frb_cnt is a power of two, else round up */ if ((frb_cnt & (frb_cnt - 1)) != 0) { frb_cnt--; frb_cnt |= (frb_cnt >> 1); frb_cnt |= (frb_cnt >> 2); frb_cnt |= (frb_cnt >> 4); frb_cnt |= (frb_cnt >> 8); frb_cnt |= (frb_cnt >> 16); frb_cnt++; } lck_mtx_init(&fsw->fsw_detach_barrier_lock, &nexus_lock_group, &nexus_lock_attr); lck_mtx_init(&fsw->fsw_reap_lock, &nexus_lock_group, &nexus_lock_attr); lck_mtx_init(&fsw->fsw_linger_lock, &nexus_lock_group, &nexus_lock_attr); TAILQ_INIT(&fsw->fsw_linger_head); lck_mtx_init(&fsw->fsw_rxstrc_lock, &nexus_lock_group, &nexus_lock_attr); TAILQ_INIT(&fsw->fsw_rxstrc_head); fsw_name = tsnprintf(name, sizeof(name), "%s_%llu", NX_FSW_NAME, nx->nx_id); error = nx_advisory_alloc(nx, fsw_name, &NX_PROV(nx)->nxprov_region_params[SKMEM_REGION_NEXUSADV], NEXUS_ADVISORY_TYPE_FLOWSWITCH); if (error != 0) { fsw_dp_dtor(fsw); return error; } fsw->fsw_flow_mgr = flow_mgr_create(fe_cnt, fob_cnt, frb_cnt, frib_cnt); if (fsw->fsw_flow_mgr == NULL) { fsw_dp_dtor(fsw); return error; } /* generic name; will be customized upon ifattach */ (void) snprintf(fsw->fsw_reap_name, sizeof(fsw->fsw_reap_name), FSW_REAP_THREADNAME, name, ""); if (kernel_thread_start(fsw_reap_thread_func, fsw, &fsw->fsw_reap_thread) != KERN_SUCCESS) { panic_plain("%s: can't create thread", __func__); /* NOTREACHED */ __builtin_unreachable(); } /* this must not fail */ VERIFY(fsw->fsw_reap_thread != NULL); SK_DF(SK_VERB_MEM, "fsw %p ALLOC", SK_KVA(fsw)); return error; } void fsw_dp_dtor(struct nx_flowswitch *fsw) { uint64_t f = (1 * NSEC_PER_MSEC); /* 1 ms */ uint64_t s = (1000 * NSEC_PER_SEC); /* 1 sec */ uint32_t i = 0; #if (DEVELOPMENT || DEBUG) if (fsw->fsw_rps_threads != NULL) { for (i = 0; i < fsw->fsw_rps_nthreads; i++) { fsw_rps_thread_join(fsw, i); } kfree_type_counted_by(struct fsw_rps_thread, fsw->fsw_rps_nthreads, fsw->fsw_rps_threads); } #endif /* !DEVELOPMENT && !DEBUG */ nx_advisory_free(fsw->fsw_nx); if (fsw->fsw_reap_thread != THREAD_NULL) { /* signal thread to begin self-termination */ lck_mtx_lock(&fsw->fsw_reap_lock); fsw->fsw_reap_flags |= FSW_REAPF_TERMINATING; /* * And wait for thread to terminate; use another * wait channel here other than fsw_reap_flags to * make it more explicit. In the event the reaper * thread misses a wakeup, we'll try again once * every second (except for the first time). */ while (!(fsw->fsw_reap_flags & FSW_REAPF_TERMINATED)) { uint64_t t = 0; nanoseconds_to_absolutetime((i++ == 0) ? f : s, &t); clock_absolutetime_interval_to_deadline(t, &t); ASSERT(t != 0); fsw->fsw_reap_flags |= FSW_REAPF_TERMINATEBLOCK; if (!(fsw->fsw_reap_flags & FSW_REAPF_RUNNING)) { thread_wakeup((caddr_t)&fsw->fsw_reap_flags); } (void) assert_wait_deadline(&fsw->fsw_reap_thread, THREAD_UNINT, t); lck_mtx_unlock(&fsw->fsw_reap_lock); thread_block(THREAD_CONTINUE_NULL); lck_mtx_lock(&fsw->fsw_reap_lock); fsw->fsw_reap_flags &= ~FSW_REAPF_TERMINATEBLOCK; } ASSERT(fsw->fsw_reap_flags & FSW_REAPF_TERMINATED); lck_mtx_unlock(&fsw->fsw_reap_lock); fsw->fsw_reap_thread = THREAD_NULL; } /* free any remaining flow entries in the linger list */ fsw_linger_purge(fsw); fsw_rxstrc_purge(fsw); if (fsw->fsw_flow_mgr != NULL) { flow_mgr_destroy(fsw->fsw_flow_mgr); fsw->fsw_flow_mgr = NULL; } lck_mtx_destroy(&fsw->fsw_detach_barrier_lock, &nexus_lock_group); lck_mtx_destroy(&fsw->fsw_reap_lock, &nexus_lock_group); lck_mtx_destroy(&fsw->fsw_linger_lock, &nexus_lock_group); } void fsw_linger_insert(struct flow_entry *fe) { struct nx_flowswitch *fsw = fe->fe_fsw; SK_LOG_VAR(char dbgbuf[FLOWENTRY_DBGBUF_SIZE]); SK_DF(SK_VERB_FLOW, "fe \"%s\"", fe2str(fe, dbgbuf, sizeof(dbgbuf))); net_update_uptime(); ASSERT(flow_entry_refcnt(fe) >= 1); ASSERT(fe->fe_flags & FLOWENTF_TORN_DOWN); ASSERT(fe->fe_flags & FLOWENTF_DESTROYED); ASSERT(!(fe->fe_flags & FLOWENTF_LINGERING)); ASSERT(fe->fe_flags & FLOWENTF_WAIT_CLOSE); ASSERT(fe->fe_linger_wait != 0); fe->fe_linger_expire = (net_uptime() + fe->fe_linger_wait); os_atomic_or(&fe->fe_flags, FLOWENTF_LINGERING, relaxed); lck_mtx_lock_spin(&fsw->fsw_linger_lock); TAILQ_INSERT_TAIL(&fsw->fsw_linger_head, fe, fe_linger_link); fsw->fsw_linger_cnt++; VERIFY(fsw->fsw_linger_cnt != 0); lck_mtx_unlock(&fsw->fsw_linger_lock); fsw_reap_sched(fsw); } static void fsw_linger_remove_internal(struct flow_entry_linger_head *linger_head, struct flow_entry *fe) { SK_LOG_VAR(char dbgbuf[FLOWENTRY_DBGBUF_SIZE]); SK_DF(SK_VERB_FLOW, "fe \"%s\"", fe2str(fe, dbgbuf, sizeof(dbgbuf))); ASSERT(fe->fe_flags & FLOWENTF_TORN_DOWN); ASSERT(fe->fe_flags & FLOWENTF_DESTROYED); ASSERT(fe->fe_flags & FLOWENTF_LINGERING); os_atomic_andnot(&fe->fe_flags, FLOWENTF_LINGERING, relaxed); TAILQ_REMOVE(linger_head, fe, fe_linger_link); flow_entry_release(&fe); } static void fsw_linger_remove(struct flow_entry *fe) { struct nx_flowswitch *fsw = fe->fe_fsw; LCK_MTX_ASSERT(&fsw->fsw_linger_lock, LCK_MTX_ASSERT_OWNED); fsw_linger_remove_internal(&fsw->fsw_linger_head, fe); VERIFY(fsw->fsw_linger_cnt != 0); fsw->fsw_linger_cnt--; } void fsw_linger_purge(struct nx_flowswitch *fsw) { struct flow_entry *fe, *tfe; lck_mtx_lock(&fsw->fsw_linger_lock); TAILQ_FOREACH_SAFE(fe, &fsw->fsw_linger_head, fe_linger_link, tfe) { fsw_linger_remove(fe); } ASSERT(fsw->fsw_linger_cnt == 0); ASSERT(TAILQ_EMPTY(&fsw->fsw_linger_head)); lck_mtx_unlock(&fsw->fsw_linger_lock); } void fsw_rxstrc_insert(struct flow_entry *fe) { struct nx_flowswitch *fsw = fe->fe_fsw; SK_LOG_VAR(char dbgbuf[FLOWENTRY_DBGBUF_SIZE]); SK_DF(SK_VERB_FLOW, "fe \"%s\"", fe2str(fe, dbgbuf, sizeof(dbgbuf))); ASSERT(flow_entry_refcnt(fe) >= 1); ASSERT(fe->fe_flags & FLOWENTF_TORN_DOWN); ASSERT(fe->fe_flags & FLOWENTF_DESTROYED); ASSERT(fe->fe_flags & FLOWENTF_AOP_OFFLOAD); ASSERT(!(fe->fe_flags & FLOWENTF_RXSTRC_PENDING)); os_atomic_or(&fe->fe_flags, FLOWENTF_RXSTRC_PENDING, relaxed); flow_entry_retain(fe); lck_mtx_lock_spin(&fsw->fsw_rxstrc_lock); TAILQ_INSERT_TAIL(&fsw->fsw_rxstrc_head, fe, fe_rxstrc_link); fsw->fsw_rxstrc_cnt++; VERIFY(fsw->fsw_rxstrc_cnt != 0); lck_mtx_unlock(&fsw->fsw_rxstrc_lock); fsw_reap_sched(fsw); } static void fsw_rxstrc_remove_internal(struct flow_entry_rxstrc_head *rxstrc_head, struct flow_entry *fe) { SK_LOG_VAR(char dbgbuf[FLOWENTRY_DBGBUF_SIZE]); SK_DF(SK_VERB_FLOW, "fe \"%s\"", fe2str(fe, dbgbuf, sizeof(dbgbuf))); ASSERT(fe->fe_flags & FLOWENTF_TORN_DOWN); ASSERT(fe->fe_flags & FLOWENTF_DESTROYED); ASSERT(fe->fe_flags & FLOWENTF_AOP_OFFLOAD); ASSERT(fe->fe_flags & FLOWENTF_RXSTRC_PENDING); os_atomic_andnot(&fe->fe_flags, FLOWENTF_RXSTRC_PENDING, relaxed); TAILQ_REMOVE(rxstrc_head, fe, fe_rxstrc_link); flow_entry_release(&fe); } static void fsw_rxstrc_remove(struct flow_entry *fe) { struct nx_flowswitch *fsw = fe->fe_fsw; LCK_MTX_ASSERT(&fsw->fsw_rxstrc_lock, LCK_MTX_ASSERT_OWNED); fsw_rxstrc_remove_internal(&fsw->fsw_rxstrc_head, fe); VERIFY(fsw->fsw_rxstrc_cnt != 0); fsw->fsw_rxstrc_cnt--; } void fsw_rxstrc_purge(struct nx_flowswitch *fsw) { struct flow_entry *fe, *tfe; lck_mtx_lock(&fsw->fsw_rxstrc_lock); TAILQ_FOREACH_SAFE(fe, &fsw->fsw_rxstrc_head, fe_rxstrc_link, tfe) { fsw_rxstrc_remove(fe); } ASSERT(fsw->fsw_rxstrc_cnt == 0); ASSERT(TAILQ_EMPTY(&fsw->fsw_rxstrc_head)); lck_mtx_unlock(&fsw->fsw_rxstrc_lock); } static void fsw_defunct_rx_stall_channel(struct nx_flowswitch *fsw) { struct kern_nexus *nx; uint64_t now = net_uptime(); nx = fsw->fsw_nx; /* Walk through all channels and check for Rx stall condition */ /* uncrustify doesn't handle C blocks properly */ /* BEGIN IGNORE CODESTYLE */ nx_port_foreach(nx, ^(nexus_port_t nxport) { struct nexus_adapter *na = nx_port_get_na(nx, nxport); uint64_t elapsed, enqueue_ts, dequeue_ts; struct __kern_channel_ring *ring; struct kern_channel *ch; struct proc *p; if (na == NULL || na->na_work_ts == 0 || na->na_rx_rings == NULL) { return; } ch = (struct kern_channel *)na->na_private; if (ch == NULL) { return; } ring = KR_SINGLE(na->na_rx_rings); enqueue_ts = ring->ckr_rx_enqueue_ts; dequeue_ts = ring->ckr_rx_dequeue_ts; /* Elapsed time since last Rx enqueue */ elapsed = now - enqueue_ts; if ((dequeue_ts < enqueue_ts) && (elapsed > fsw_rx_stall_thresh)) { p = proc_find(ch->ch_pid); if (p == NULL) { return; } if (fsw_rx_stall_defunct) { kern_channel_defunct(p, ch); } proc_rele(p); DTRACE_SKYWALK3(rx__stall, struct nx_flowswitch *, fsw, struct nexus_adapter *, na, struct __kern_channel_ring *, ring); FSW_STATS_INC(FSW_STATS_RX_STALL); SK_ERR("Rx stall detected in proc %s(%d) (%s): " "elapsed %llu (s), now: %llu, enqueue: %llu, dequeue: %llu, " "defunct: %s", ch->ch_name, ch->ch_pid, fsw->fsw_ifp->if_xname, elapsed, now, enqueue_ts, dequeue_ts, fsw_rx_stall_defunct ? "yes" : "no"); } }); /* END IGNORE CODESTYLE */ } void fsw_reap_sched(struct nx_flowswitch *fsw) { ASSERT(fsw->fsw_reap_thread != THREAD_NULL); lck_mtx_lock_spin(&fsw->fsw_reap_lock); if (!(fsw->fsw_reap_flags & FSW_REAPF_RUNNING) && !(fsw->fsw_reap_flags & (FSW_REAPF_TERMINATING | FSW_REAPF_TERMINATED))) { thread_wakeup((caddr_t)&fsw->fsw_reap_flags); } lck_mtx_unlock(&fsw->fsw_reap_lock); } __attribute__((noreturn)) static void fsw_reap_thread_func(void *v, wait_result_t w) { #pragma unused(w) struct nx_flowswitch *__single fsw = v; ASSERT(fsw->fsw_reap_thread == current_thread()); /* * -fbounds-safety: __unsafe_null_terminated_from_indexable provides * checks to ensure source contains the null terminator, by doing a * linear scan of the string. */ thread_set_thread_name(current_thread(), __unsafe_null_terminated_from_indexable(fsw->fsw_reap_name)); net_update_uptime(); lck_mtx_lock(&fsw->fsw_reap_lock); VERIFY(!(fsw->fsw_reap_flags & FSW_REAPF_RUNNING)); (void) assert_wait(&fsw->fsw_reap_flags, THREAD_UNINT); lck_mtx_unlock(&fsw->fsw_reap_lock); thread_block_parameter(fsw_reap_thread_cont, fsw); /* NOTREACHED */ __builtin_unreachable(); } __attribute__((noreturn)) static void fsw_reap_thread_cont(void *v, wait_result_t wres) { struct nx_flowswitch *__single fsw = v; boolean_t low; uint64_t t = 0; SK_DF(SK_VERB_FLOW, "%s: running", fsw->fsw_reap_name); lck_mtx_lock(&fsw->fsw_reap_lock); if (__improbable(wres == THREAD_INTERRUPTED || (fsw->fsw_reap_flags & FSW_REAPF_TERMINATING) != 0)) { goto terminate; } ASSERT(!(fsw->fsw_reap_flags & FSW_REAPF_TERMINATED)); fsw->fsw_reap_flags |= FSW_REAPF_RUNNING; lck_mtx_unlock(&fsw->fsw_reap_lock); net_update_uptime(); /* prevent detach from happening while we're here */ if (!fsw_detach_barrier_add(fsw)) { SK_ERR("%s: netagent detached", fsw->fsw_reap_name); t = 0; } else { uint32_t fe_nonviable, fe_freed, fe_aborted; uint32_t fr_freed, fr_resid = 0; struct ifnet *ifp = fsw->fsw_ifp; uint64_t i = FSW_REAP_IVAL; uint64_t now = net_uptime(); uint64_t last; ASSERT(fsw->fsw_ifp != NULL); /* * Pass 1: process any deferred {withdrawn,nonviable} requests. */ fe_nonviable = fsw_process_deferred(fsw); /* * Pass 2: remove any expired lingering flows. */ fe_freed = fsw_process_linger(fsw, &fe_aborted); /* * Pass 3: process any pending Rx steering rule cleanup flows */ fsw_process_rxstrc(fsw); /* * Pass 4: prune idle flow routes. */ fr_freed = flow_route_prune(fsw->fsw_flow_mgr, ifp, &fr_resid); /* * Pass 5: prune flow table * */ cuckoo_hashtable_try_shrink(fsw->fsw_flow_mgr->fm_flow_table); SK_DF(SK_VERB_FLOW, "%s: fe_nonviable %u/%u fe_freed %u/%u " "fe_aborted %u fr_freed %u/%u", fsw->fsw_flow_mgr->fm_name, fe_nonviable, (fe_nonviable + fsw->fsw_pending_nonviable), fe_freed, fsw->fsw_linger_cnt, fe_aborted, fe_freed, (fe_freed + fr_resid)); /* see if VM memory level is critical */ low = skmem_lowmem_check(); /* * If things appear to be idle, we can prune away cached * object that have fallen out of the working sets (this * is different than purging). Every once in a while, we * also purge the caches. Note that this is done across * all flowswitch instances, and so we limit this to no * more than once every FSW_REAP_SK_THRES seconds. */ last = os_atomic_load(&fsw_reap_last, relaxed); if ((low || (last != 0 && (now - last) >= FSW_REAP_SK_THRES)) && os_atomic_cmpxchg(&fsw_reap_last, last, now, acq_rel)) { fsw_purge_cache(fsw, low); /* increase sleep interval if idle */ if (kdebug_enable == 0 && fsw->fsw_linger_cnt == 0 && fsw->fsw_pending_nonviable == 0 && fr_resid == 0) { i <<= 3; } } else if (last == 0) { os_atomic_store(&fsw_reap_last, now, release); } /* * Additionally, run thru the list of channels and prune * or purge away cached objects on "idle" channels. This * check is rate limited to no more than once every * FSW_DRAIN_CH_THRES seconds. */ last = fsw->fsw_drain_channel_chk_last; if (low || (last != 0 && (now - last) >= FSW_DRAIN_CH_THRES)) { SK_DF(SK_VERB_FLOW, "%s: pruning channels", fsw->fsw_flow_mgr->fm_name); fsw->fsw_drain_channel_chk_last = now; fsw_drain_channels(fsw, now, low); } else if (__improbable(last == 0)) { fsw->fsw_drain_channel_chk_last = now; } /* * Finally, invoke the interface's reap callback to * tell it to prune or purge away cached objects if * it is idle. This check is rate limited to no more * than once every FSW_REAP_IF_THRES seconds. */ last = fsw->fsw_drain_netif_chk_last; if (low || (last != 0 && (now - last) >= FSW_REAP_IF_THRES)) { ASSERT(fsw->fsw_nifna != NULL); if (ifp->if_na_ops != NULL && ifp->if_na_ops->ni_reap != NULL) { SK_DF(SK_VERB_FLOW, "%s: pruning netif", fsw->fsw_flow_mgr->fm_name); ifp->if_na_ops->ni_reap(ifp->if_na, ifp, FSW_REAP_IF_THRES, low); } fsw->fsw_drain_netif_chk_last = now; } else if (__improbable(last == 0)) { fsw->fsw_drain_netif_chk_last = now; } /* emit periodic interface stats ktrace */ last = fsw->fsw_reap_last; if (last != 0 && (now - last) >= FSW_IFSTATS_THRES) { KDBG(SK_KTRACE_AON_IF_STATS, ifp->if_data.ifi_ipackets, ifp->if_data.ifi_ibytes * 8, ifp->if_data.ifi_opackets, ifp->if_data.ifi_obytes * 8); fsw->fsw_reap_last = now; } else if (__improbable(last == 0)) { fsw->fsw_reap_last = now; } /* Check for Rx stall condition every fsw_rx_stall_thresh seconds */ last = fsw->fsw_rx_stall_chk_last; if (fsw_rx_stall_thresh != 0) { if (last != 0 && (now - last) >= fsw_rx_stall_thresh) { fsw_defunct_rx_stall_channel(fsw); fsw->fsw_rx_stall_chk_last = now; } else if (__improbable(last == 0)) { fsw->fsw_rx_stall_chk_last = now; } } nanoseconds_to_absolutetime(i * NSEC_PER_SEC, &t); clock_absolutetime_interval_to_deadline(t, &t); ASSERT(t != 0); /* allow any pending detach to proceed */ fsw_detach_barrier_remove(fsw); } lck_mtx_lock(&fsw->fsw_reap_lock); if (!(fsw->fsw_reap_flags & FSW_REAPF_TERMINATING)) { fsw->fsw_reap_flags &= ~FSW_REAPF_RUNNING; (void) assert_wait_deadline(&fsw->fsw_reap_flags, THREAD_UNINT, t); lck_mtx_unlock(&fsw->fsw_reap_lock); thread_block_parameter(fsw_reap_thread_cont, fsw); /* NOTREACHED */ __builtin_unreachable(); } else { terminate: LCK_MTX_ASSERT(&fsw->fsw_reap_lock, LCK_MTX_ASSERT_OWNED); fsw->fsw_reap_flags &= ~(FSW_REAPF_RUNNING | FSW_REAPF_TERMINATING); fsw->fsw_reap_flags |= FSW_REAPF_TERMINATED; /* * And signal any thread waiting for us to terminate; * wait channel here other than fsw_reap_flags to make * it more explicit. */ if (fsw->fsw_reap_flags & FSW_REAPF_TERMINATEBLOCK) { thread_wakeup((caddr_t)&fsw->fsw_reap_thread); } lck_mtx_unlock(&fsw->fsw_reap_lock); SK_DF(SK_VERB_FLOW, "%s: terminating", fsw->fsw_reap_name); /* for the extra refcnt from kernel_thread_start() */ thread_deallocate(current_thread()); /* this is the end */ thread_terminate(current_thread()); /* NOTREACHED */ __builtin_unreachable(); } /* must never get here */ VERIFY(0); /* NOTREACHED */ __builtin_unreachable(); } static void fsw_drain_channels(struct nx_flowswitch *fsw, uint64_t now, boolean_t low) { struct kern_nexus *nx = fsw->fsw_nx; /* flowswitch protects NA via fsw_lock, see fsw_port_alloc/free */ FSW_RLOCK(fsw); /* uncrustify doesn't handle C blocks properly */ /* BEGIN IGNORE CODESTYLE */ nx_port_foreach(nx, ^(nexus_port_t p) { boolean_t purge; struct nexus_adapter *na = nx_port_get_na(nx, p); if (na == NULL) { DTRACE_SKYWALK1(ch__drain__na__null, struct nexus_adapter *, na); return; } /* * If NA is deactivated, no need to proceed further with channel drain. * Note: fsw_vp_na_activate takes FSW_WLOCK before clearing the * NAF_ACTIVE flag. */ if ((na->na_flags & NAF_ACTIVE) == 0) { DTRACE_SKYWALK1(ch__drain__na__inactive, struct nexus_adapter *, na); return; } if (na->na_work_ts == 0 || na->na_rx_rings == NULL) { DTRACE_SKYWALK1(ch__drain__na__invalid, struct nexus_adapter *, na); return; } /* * If some activity happened in the last FSW_DRAIN_CH_THRES * seconds on this channel, we reclaim memory if the channel * throughput is less than the reap threshold value. */ if ((now - na->na_work_ts) < FSW_DRAIN_CH_THRES) { struct __kern_channel_ring *__single ring; channel_ring_stats *stats; uint64_t bps; ring = KR_SINGLE(na->na_rx_rings); stats = &ring->ckr_stats; bps = stats->crs_bytes_per_second; if (bps < fsw_channel_reap_thresh) { purge = FALSE; na_drain(na, purge); } return; } /* * If NA has been inactive for some time (twice the drain * threshold), we clear the work timestamp to temporarily skip * this channel until it's active again. Purging cached objects * can be expensive since we'd need to allocate and construct * them again, so we do it only when necessary. */ if (low || ((now - na->na_work_ts) >= (FSW_DRAIN_CH_THRES << 1))) { na->na_work_ts = 0; purge = TRUE; } else { purge = FALSE; } na_drain(na, purge); /* purge/prune caches */ }); /* END IGNORE CODESTYLE */ FSW_RUNLOCK(fsw); } static void fsw_purge_cache(struct nx_flowswitch *fsw, boolean_t low) { #pragma unused(fsw) uint64_t o = os_atomic_inc_orig(&fsw_want_purge, relaxed); uint32_t p = fsw_flow_purge_thresh; boolean_t purge = (low || (o != 0 && p != 0 && (o % p) == 0)); SK_DF(SK_VERB_FLOW, "%s: %s caches", fsw->fsw_flow_mgr->fm_name, (purge ? "purge" : "prune")); skmem_cache_reap_now(sk_fo_cache, purge); skmem_cache_reap_now(sk_fe_cache, purge); skmem_cache_reap_now(sk_fab_cache, purge); skmem_cache_reap_now(flow_route_cache, purge); skmem_cache_reap_now(flow_stats_cache, purge); netns_reap_caches(purge); skmem_reap_caches(purge); #if CONFIG_MBUF_MCACHE if (if_is_fsw_transport_netagent_enabled() && purge) { mbuf_drain(FALSE); } #endif /* CONFIG_MBUF_MCACHE */ } static void fsw_flow_handle_low_power(struct nx_flowswitch *fsw, struct flow_entry *fe) { /* When the interface is in low power mode, the flow is nonviable */ if (!(fe->fe_flags & FLOWENTF_NONVIABLE) && os_atomic_cmpxchg(&fe->fe_want_nonviable, 0, 1, acq_rel)) { os_atomic_inc(&fsw->fsw_pending_nonviable, relaxed); } } static uint32_t fsw_process_deferred(struct nx_flowswitch *fsw) { struct flow_entry_dead sfed __sk_aligned(8); struct flow_mgr *fm = fsw->fsw_flow_mgr; struct flow_entry_dead *fed, *tfed; LIST_HEAD(, flow_entry_dead) fed_head = LIST_HEAD_INITIALIZER(fed_head); uint32_t i, nonviable = 0; boolean_t lowpowermode = FALSE; bzero(&sfed, sizeof(sfed)); /* * The flows become nonviable when the interface * is in low power mode (edge trigger) */ if ((fsw->fsw_ifp->if_xflags & IFXF_LOW_POWER) && fsw->fsw_ifp->if_low_power_gencnt != fsw->fsw_low_power_gencnt) { lowpowermode = TRUE; fsw->fsw_low_power_gencnt = fsw->fsw_ifp->if_low_power_gencnt; } /* * Scan thru the flow entry tree, and commit any pending withdraw or * nonviable requests. We may need to push stats and/or unassign the * nexus from NECP, but we cannot do that while holding the locks; * build a temporary list for those entries. */ for (i = 0; i < fm->fm_owner_buckets_cnt; i++) { struct flow_owner_bucket *fob = flow_mgr_get_fob_at_idx(fm, i); struct flow_owner *fo; /* * Grab the lock at all costs when handling low power mode */ if (__probable(!lowpowermode)) { if (!FOB_TRY_LOCK(fob)) { continue; } } else { FOB_LOCK(fob); } FOB_LOCK_ASSERT_HELD(fob); RB_FOREACH(fo, flow_owner_tree, &fob->fob_owner_head) { struct flow_entry *fe; RB_FOREACH(fe, flow_entry_id_tree, &fo->fo_flow_entry_id_head) { /* try first as reader; skip if we can't */ if (__improbable(lowpowermode)) { fsw_flow_handle_low_power(fsw, fe); } if (__improbable(fe->fe_flags & FLOWENTF_HALF_CLOSED)) { os_atomic_andnot(&fe->fe_flags, FLOWENTF_HALF_CLOSED, relaxed); flow_namespace_half_close(&fe->fe_port_reservation); } /* if not withdrawn/nonviable, skip */ if (!fe->fe_want_withdraw && !fe->fe_want_nonviable) { continue; } /* * Here we're holding the lock as writer; * don't spend too much time as we're * blocking the data path now. */ ASSERT(!uuid_is_null(fe->fe_uuid)); /* only need flow UUID and booleans */ uuid_copy(sfed.fed_uuid, fe->fe_uuid); sfed.fed_want_clonotify = (fe->fe_flags & FLOWENTF_CLOSE_NOTIFY); sfed.fed_want_nonviable = fe->fe_want_nonviable; flow_entry_teardown(fo, fe); /* do this outside the flow bucket lock */ fed = flow_entry_dead_alloc(Z_WAITOK); ASSERT(fed != NULL); *fed = sfed; LIST_INSERT_HEAD(&fed_head, fed, fed_link); } } FOB_UNLOCK(fob); } /* * These nonviable flows are no longer useful since we've lost * the source IP address; in the event the client monitors the * viability of the flow, explicitly mark it as nonviable so * that a new flow can be created. */ LIST_FOREACH_SAFE(fed, &fed_head, fed_link, tfed) { LIST_REMOVE(fed, fed_link); ASSERT(fsw->fsw_agent_session != NULL); /* if flow is closed early */ if (fed->fed_want_clonotify) { necp_client_early_close(fed->fed_uuid); } /* if nonviable, unassign nexus attributes */ if (fed->fed_want_nonviable) { (void) netagent_assign_nexus(fsw->fsw_agent_session, fed->fed_uuid, NULL, 0); } flow_entry_dead_free(fed); ++nonviable; } ASSERT(LIST_EMPTY(&fed_head)); return nonviable; } static uint32_t fsw_process_linger(struct nx_flowswitch *fsw, uint32_t *abort) { struct flow_entry_linger_head linger_head = TAILQ_HEAD_INITIALIZER(linger_head); struct flow_entry *fe, *tfe; uint64_t now = net_uptime(); uint32_t i = 0, cnt = 0, freed = 0; ASSERT(fsw->fsw_ifp != NULL); ASSERT(abort != NULL); *abort = 0; /* * We don't want to contend with the datapath, so move * everything that's in the linger list into a local list. * This allows us to generate RSTs or free the flow entry * outside the lock. Any remaining flow entry in the local * list will get re-added back to the head of the linger * list, in front of any new ones added since then. */ lck_mtx_lock(&fsw->fsw_linger_lock); TAILQ_CONCAT(&linger_head, &fsw->fsw_linger_head, fe_linger_link); ASSERT(TAILQ_EMPTY(&fsw->fsw_linger_head)); cnt = fsw->fsw_linger_cnt; fsw->fsw_linger_cnt = 0; lck_mtx_unlock(&fsw->fsw_linger_lock); TAILQ_FOREACH_SAFE(fe, &linger_head, fe_linger_link, tfe) { ASSERT(fe->fe_flags & FLOWENTF_TORN_DOWN); ASSERT(fe->fe_flags & FLOWENTF_DESTROYED); ASSERT(fe->fe_flags & FLOWENTF_LINGERING); /* * See if this is a TCP flow that needs to generate * a RST to the remote peer (if not already). */ if (flow_track_tcp_want_abort(fe)) { VERIFY(fe->fe_flags & FLOWENTF_ABORTED); ASSERT(!uuid_is_null(fe->fe_uuid)); flow_track_abort_tcp(fe, NULL, NULL); (*abort)++; SK_LOG_VAR(char dbgbuf[FLOWENTRY_DBGBUF_SIZE]); SK_DF(SK_VERB_FLOW, "fe \"%s\" [RST]", fe2str(fe, dbgbuf, sizeof(dbgbuf))); } /* * If flow has expired, remove from list and free; * otherwise leave it around in the linger list. */ if (fe->fe_linger_expire <= now) { freed++; fsw_linger_remove_internal(&linger_head, fe); fe = NULL; } ++i; } VERIFY(i == cnt && cnt >= freed); /* * Add any remaining ones back into the linger list. */ lck_mtx_lock(&fsw->fsw_linger_lock); if (!TAILQ_EMPTY(&linger_head)) { ASSERT(TAILQ_EMPTY(&fsw->fsw_linger_head) || fsw->fsw_linger_cnt); TAILQ_CONCAT(&linger_head, &fsw->fsw_linger_head, fe_linger_link); ASSERT(TAILQ_EMPTY(&fsw->fsw_linger_head)); TAILQ_CONCAT(&fsw->fsw_linger_head, &linger_head, fe_linger_link); fsw->fsw_linger_cnt += (cnt - freed); } ASSERT(TAILQ_EMPTY(&linger_head)); lck_mtx_unlock(&fsw->fsw_linger_lock); return freed; } static void fsw_process_rxstrc(struct nx_flowswitch *fsw) { struct flow_entry_rxstrc_head rxstrc_head = TAILQ_HEAD_INITIALIZER(rxstrc_head); struct flow_entry *fe, *tfe; /* * We don't want to contend with the datapath, so move * everything that's in the rxstrc list into a local list. * This allows us to cleanup Rx steering rules or free the flow entry * outside the lock. */ lck_mtx_lock(&fsw->fsw_rxstrc_lock); TAILQ_CONCAT(&rxstrc_head, &fsw->fsw_rxstrc_head, fe_rxstrc_link); ASSERT(TAILQ_EMPTY(&fsw->fsw_rxstrc_head)); fsw->fsw_rxstrc_cnt = 0; lck_mtx_unlock(&fsw->fsw_rxstrc_lock); TAILQ_FOREACH_SAFE(fe, &rxstrc_head, fe_rxstrc_link, tfe) { ASSERT(fe->fe_flags & FLOWENTF_TORN_DOWN); ASSERT(fe->fe_flags & FLOWENTF_DESTROYED); ASSERT(fe->fe_flags & FLOWENTF_RXSTRC_PENDING); ASSERT(fe->fe_flags & FLOWENTF_AOP_OFFLOAD); flow_entry_rx_steering_rule_cleanup(fsw, fe); fsw_rxstrc_remove_internal(&rxstrc_head, fe); fe = NULL; } } __attribute__((always_inline)) static inline void fsw_ifp_inc_traffic_class_in_pkt(struct ifnet *ifp, kern_packet_t ph) { switch (__packet_get_traffic_class(ph)) { case PKT_TC_BE: ifp->if_tc.ifi_ibepackets++; ifp->if_tc.ifi_ibebytes += SK_PTR_ADDR_KPKT(ph)->pkt_length; break; case PKT_TC_BK: ifp->if_tc.ifi_ibkpackets++; ifp->if_tc.ifi_ibkbytes += SK_PTR_ADDR_KPKT(ph)->pkt_length; break; case PKT_TC_VI: ifp->if_tc.ifi_ivipackets++; ifp->if_tc.ifi_ivibytes += SK_PTR_ADDR_KPKT(ph)->pkt_length; break; case PKT_TC_VO: ifp->if_tc.ifi_ivopackets++; ifp->if_tc.ifi_ivobytes += SK_PTR_ADDR_KPKT(ph)->pkt_length; break; default: break; } } __attribute__((always_inline)) static inline void fsw_ifp_inc_traffic_class_out_pkt(struct ifnet *ifp, uint32_t svc, uint32_t cnt, uint32_t len) { switch (svc) { case PKT_TC_BE: ifp->if_tc.ifi_obepackets += cnt; ifp->if_tc.ifi_obebytes += len; break; case PKT_TC_BK: ifp->if_tc.ifi_obkpackets += cnt; ifp->if_tc.ifi_obkbytes += len; break; case PKT_TC_VI: ifp->if_tc.ifi_ovipackets += cnt; ifp->if_tc.ifi_ovibytes += len; break; case PKT_TC_VO: ifp->if_tc.ifi_ovopackets += cnt; ifp->if_tc.ifi_ovobytes += len; break; default: break; } } |