avf plugin: add support for logging - vpp

diff options

author	Jakub Grajciar <jgrajcia@cisco.com>	2018-05-21 12:39:03 +0200
committer	Damjan Marion <dmarion.lists@gmail.com>	2018-05-22 17:39:39 +0000
commit	b5236cb975c766154a36d0d59731850683635ea4 (patch)
tree	2d5aab62a78e328474c89b0ffbcf762b6846907a /src/vnet/tcp
parent	3e0ee6ec3ce1d3f32c1faca7514048e55412220e (diff)

avf plugin: add support for logging

Change-Id: Ic8c5b527395fc99f1e1a72e51f8d41c9b4f415df Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>

Diffstat (limited to 'src/vnet/tcp')

0 files changed, 0 insertions, 0 deletions

/* * Copyright (c) 2016 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <stddef.h> #include <netinet/in.h> #include <vlib/vlib.h> #include <vnet/vnet.h> #include <vnet/pg/pg.h> #include <vppinfra/error.h> #include <acl/acl.h> #include "bihash_40_8.h" #include <vppinfra/bihash_template.h> #include <vppinfra/bihash_template.c> #include "fa_node.h" #include "hash_lookup.h" typedef struct { u32 next_index; u32 sw_if_index; u32 match_acl_in_index; u32 match_rule_index; u64 packet_info[6]; u32 trace_bitmap; u8 action; } acl_fa_trace_t; /* packet trace format function */ static u8 * format_acl_fa_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); acl_fa_trace_t *t = va_arg (*args, acl_fa_trace_t *); s = format (s, "acl-plugin: sw_if_index %d, next index %d, action: %d, match: acl %d rule %d trace_bits %08x\n" " pkt info %016llx %016llx %016llx %016llx %016llx %016llx", t->sw_if_index, t->next_index, t->action, t->match_acl_in_index, t->match_rule_index, t->trace_bitmap, t->packet_info[0], t->packet_info[1], t->packet_info[2], t->packet_info[3], t->packet_info[4], t->packet_info[5]); return s; } /* *INDENT-OFF* */ #define foreach_acl_fa_error \ _(ACL_DROP, "ACL deny packets") \ _(ACL_PERMIT, "ACL permit packets") \ _(ACL_NEW_SESSION, "new sessions added") \ _(ACL_EXIST_SESSION, "existing session packets") \ _(ACL_CHECK, "checked packets") \ _(ACL_RESTART_SESSION_TIMER, "restart session timer") \ _(ACL_TOO_MANY_SESSIONS, "too many sessions to add new") \ /* end of errors */ typedef enum { #define _(sym,str) ACL_FA_ERROR_##sym, foreach_acl_fa_error #undef _ ACL_FA_N_ERROR, } acl_fa_error_t; static char *acl_fa_error_strings[] = { #define _(sym,string) string, foreach_acl_fa_error #undef _ }; /* *INDENT-ON* */ static void * get_ptr_to_offset (vlib_buffer_t * b0, int offset) { u8 *p = vlib_buffer_get_current (b0) + offset; return p; } static int fa_acl_match_addr (ip46_address_t * addr1, ip46_address_t * addr2, int prefixlen, int is_ip6) { if (prefixlen == 0) { /* match any always succeeds */ return 1; } if (is_ip6) { if (memcmp (addr1, addr2, prefixlen / 8)) { /* If the starting full bytes do not match, no point in bittwidling the thumbs further */ return 0; } if (prefixlen % 8) { u8 b1 = *((u8 *) addr1 + 1 + prefixlen / 8); u8 b2 = *((u8 *) addr2 + 1 + prefixlen / 8); u8 mask0 = (0xff - ((1 << (8 - (prefixlen % 8))) - 1)); return (b1 & mask0) == b2; } else { /* The prefix fits into integer number of bytes, so nothing left to do */ return 1; } } else { uint32_t a1 = ntohl (addr1->ip4.as_u32); uint32_t a2 = ntohl (addr2->ip4.as_u32); uint32_t mask0 = 0xffffffff - ((1 << (32 - prefixlen)) - 1); return (a1 & mask0) == a2; } } static int fa_acl_match_port (u16 port, u16 port_first, u16 port_last, int is_ip6) { return ((port >= port_first) && (port <= port_last)); } int single_acl_match_5tuple (acl_main_t * am, u32 acl_index, fa_5tuple_t * pkt_5tuple, int is_ip6, u8 * r_action, u32 * r_acl_match_p, u32 * r_rule_match_p, u32 * trace_bitmap) { int i; acl_list_t *a; acl_rule_t *r; if (pool_is_free_index (am->acls, acl_index)) { if (r_acl_match_p) *r_acl_match_p = acl_index; if (r_rule_match_p) *r_rule_match_p = -1; /* the ACL does not exist but is used for policy. Block traffic. */ return 0; } a = am->acls + acl_index; for (i = 0; i < a->count; i++) { r = a->rules + i; if (is_ip6 != r->is_ipv6) { continue; } if (!fa_acl_match_addr (&pkt_5tuple->addr[1], &r->dst, r->dst_prefixlen, is_ip6)) continue; #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_DBG acl %d rule %d pkt dst addr %U match rule addr %U/%d", acl_index, i, format_ip46_address, &pkt_5tuple->addr[1], IP46_TYPE_ANY, format_ip46_address, &r->dst, IP46_TYPE_ANY, r->dst_prefixlen); #endif if (!fa_acl_match_addr (&pkt_5tuple->addr[0], &r->src, r->src_prefixlen, is_ip6)) continue; #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_DBG acl %d rule %d pkt src addr %U match rule addr %U/%d", acl_index, i, format_ip46_address, &pkt_5tuple->addr[0], IP46_TYPE_ANY, format_ip46_address, &r->src, IP46_TYPE_ANY, r->src_prefixlen); clib_warning ("ACL_FA_NODE_DBG acl %d rule %d trying to match pkt proto %d with rule %d", acl_index, i, pkt_5tuple->l4.proto, r->proto); #endif if (r->proto) { if (pkt_5tuple->l4.proto != r->proto) continue; if (PREDICT_FALSE (pkt_5tuple->pkt.is_nonfirst_fragment && am->l4_match_nonfirst_fragment)) { /* non-initial fragment with frag match configured - match this rule */ *trace_bitmap |= 0x80000000; *r_action = r->is_permit; if (r_acl_match_p) *r_acl_match_p = acl_index; if (r_rule_match_p) *r_rule_match_p = i; return 1; } /* A sanity check just to ensure we are about to match the ports extracted from the packet */ if (PREDICT_FALSE (!pkt_5tuple->pkt.l4_valid)) continue; #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_DBG acl %d rule %d pkt proto %d match rule %d", acl_index, i, pkt_5tuple->l4.proto, r->proto); #endif if (!fa_acl_match_port (pkt_5tuple->l4.port[0], r->src_port_or_type_first, r->src_port_or_type_last, is_ip6)) continue; #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_DBG acl %d rule %d pkt sport %d match rule [%d..%d]", acl_index, i, pkt_5tuple->l4.port[0], r->src_port_or_type_first, r->src_port_or_type_last); #endif if (!fa_acl_match_port (pkt_5tuple->l4.port[1], r->dst_port_or_code_first, r->dst_port_or_code_last, is_ip6)) continue; #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_DBG acl %d rule %d pkt dport %d match rule [%d..%d]", acl_index, i, pkt_5tuple->l4.port[1], r->dst_port_or_code_first, r->dst_port_or_code_last); #endif if (pkt_5tuple->pkt.tcp_flags_valid && ((pkt_5tuple->pkt.tcp_flags & r->tcp_flags_mask) != r->tcp_flags_value)) continue; } /* everything matches! */ #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_DBG acl %d rule %d FULL-MATCH, action %d", acl_index, i, r->is_permit); #endif *r_action = r->is_permit; if (r_acl_match_p) *r_acl_match_p = acl_index; if (r_rule_match_p) *r_rule_match_p = i; return 1; } return 0; } static u8 linear_multi_acl_match_5tuple (u32 sw_if_index, fa_5tuple_t * pkt_5tuple, int is_l2, int is_ip6, int is_input, u32 * acl_match_p, u32 * rule_match_p, u32 * trace_bitmap) { acl_main_t *am = &acl_main; int i; u32 *acl_vector; u8 action = 0; if (is_input) { vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index); acl_vector = am->input_acl_vec_by_sw_if_index[sw_if_index]; } else { vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index); acl_vector = am->output_acl_vec_by_sw_if_index[sw_if_index]; } for (i = 0; i < vec_len (acl_vector); i++) { #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_DBG: Trying to match ACL: %d", acl_vector[i]); #endif if (single_acl_match_5tuple (am, acl_vector[i], pkt_5tuple, is_ip6, &action, acl_match_p, rule_match_p, trace_bitmap)) { return action; } } if (vec_len (acl_vector) > 0) { /* If there are ACLs and none matched, deny by default */ return 0; } #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_DBG: No ACL on sw_if_index %d", sw_if_index); #endif /* Deny by default. If there are no ACLs defined we should not be here. */ return 0; } static u8 multi_acl_match_5tuple (u32 sw_if_index, fa_5tuple_t * pkt_5tuple, int is_l2, int is_ip6, int is_input, u32 * acl_match_p, u32 * rule_match_p, u32 * trace_bitmap) { acl_main_t *am = &acl_main; if (am->use_hash_acl_matching) { return hash_multi_acl_match_5tuple(sw_if_index, pkt_5tuple, is_l2, is_ip6, is_input, acl_match_p, rule_match_p, trace_bitmap); } else { return linear_multi_acl_match_5tuple(sw_if_index, pkt_5tuple, is_l2, is_ip6, is_input, acl_match_p, rule_match_p, trace_bitmap); } } static int offset_within_packet (vlib_buffer_t * b0, int offset) { /* For the purposes of this code, "within" means we have at least 8 bytes after it */ return (offset <= (b0->current_length - 8)); } static void acl_fill_5tuple (acl_main_t * am, vlib_buffer_t * b0, int is_ip6, int is_input, int is_l2_path, fa_5tuple_t * p5tuple_pkt) { int l3_offset = 14; int l4_offset; u16 ports[2]; u16 proto; /* IP4 and IP6 protocol numbers of ICMP */ static u8 icmp_protos[] = { IP_PROTOCOL_ICMP, IP_PROTOCOL_ICMP6 }; if (is_input && !(is_l2_path)) { l3_offset = 0; } /* key[0..3] contains src/dst address and is cleared/set below */ /* Remainder of the key and per-packet non-key data */ p5tuple_pkt->kv.key[4] = 0; p5tuple_pkt->kv.value = 0; if (is_ip6) { clib_memcpy (&p5tuple_pkt->addr, get_ptr_to_offset (b0, offsetof (ip6_header_t, src_address) + l3_offset), sizeof (p5tuple_pkt->addr)); proto = *(u8 *) get_ptr_to_offset (b0, offsetof (ip6_header_t, protocol) + l3_offset); l4_offset = l3_offset + sizeof (ip6_header_t); #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_DBG: proto: %d, l4_offset: %d", proto, l4_offset); #endif /* IP6 EH handling is here, increment l4_offset if needs to, update the proto */ int need_skip_eh = clib_bitmap_get (am->fa_ipv6_known_eh_bitmap, proto); if (PREDICT_FALSE (need_skip_eh)) { while (need_skip_eh && offset_within_packet (b0, l4_offset)) { /* Fragment header needs special handling */ if (PREDICT_FALSE(ACL_EH_FRAGMENT == proto)) { proto = *(u8 *) get_ptr_to_offset (b0, l4_offset); u16 frag_offset; clib_memcpy (&frag_offset, get_ptr_to_offset (b0, 2 + l4_offset), sizeof(frag_offset)); frag_offset = ntohs(frag_offset) >> 3; if (frag_offset) { p5tuple_pkt->pkt.is_nonfirst_fragment = 1; /* invalidate L4 offset so we don't try to find L4 info */ l4_offset += b0->current_length; } else { /* First fragment: skip the frag header and move on. */ l4_offset += 8; } } else { u8 nwords = *(u8 *) get_ptr_to_offset (b0, 1 + l4_offset); proto = *(u8 *) get_ptr_to_offset (b0, l4_offset); l4_offset += 8 * (1 + (u16) nwords); } #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_DBG: new proto: %d, new offset: %d", proto, l4_offset); #endif need_skip_eh = clib_bitmap_get (am->fa_ipv6_known_eh_bitmap, proto); } } } else { p5tuple_pkt->kv.key[0] = 0; p5tuple_pkt->kv.key[1] = 0; p5tuple_pkt->kv.key[2] = 0; p5tuple_pkt->kv.key[3] = 0; clib_memcpy (&p5tuple_pkt->addr[0].ip4, get_ptr_to_offset (b0, offsetof (ip4_header_t, src_address) + l3_offset), sizeof (p5tuple_pkt->addr[0].ip4)); clib_memcpy (&p5tuple_pkt->addr[1].ip4, get_ptr_to_offset (b0, offsetof (ip4_header_t, dst_address) + l3_offset), sizeof (p5tuple_pkt->addr[1].ip4)); proto = *(u8 *) get_ptr_to_offset (b0, offsetof (ip4_header_t, protocol) + l3_offset); l4_offset = l3_offset + sizeof (ip4_header_t); u16 flags_and_fragment_offset; clib_memcpy (&flags_and_fragment_offset, get_ptr_to_offset (b0, offsetof (ip4_header_t, flags_and_fragment_offset)) + l3_offset, sizeof(flags_and_fragment_offset)); flags_and_fragment_offset = ntohs (flags_and_fragment_offset); /* non-initial fragments have non-zero offset */ if ((PREDICT_FALSE(0xfff & flags_and_fragment_offset))) { p5tuple_pkt->pkt.is_nonfirst_fragment = 1; /* invalidate L4 offset so we don't try to find L4 info */ l4_offset += b0->current_length; } } p5tuple_pkt->l4.proto = proto; if (PREDICT_TRUE (offset_within_packet (b0, l4_offset))) { p5tuple_pkt->pkt.l4_valid = 1; if (icmp_protos[is_ip6] == proto) { /* type */ p5tuple_pkt->l4.port[0] = *(u8 *) get_ptr_to_offset (b0, l4_offset + offsetof (icmp46_header_t, type)); /* code */ p5tuple_pkt->l4.port[1] = *(u8 *) get_ptr_to_offset (b0, l4_offset + offsetof (icmp46_header_t, code)); } else if ((IPPROTO_TCP == proto) || (IPPROTO_UDP == proto)) { clib_memcpy (&ports, get_ptr_to_offset (b0, l4_offset + offsetof (tcp_header_t, src_port)), sizeof (ports)); p5tuple_pkt->l4.port[0] = ntohs (ports[0]); p5tuple_pkt->l4.port[1] = ntohs (ports[1]); p5tuple_pkt->pkt.tcp_flags = *(u8 *) get_ptr_to_offset (b0, l4_offset + offsetof (tcp_header_t, flags)); p5tuple_pkt->pkt.tcp_flags_valid = (proto == IPPROTO_TCP); } /* * FIXME: rather than the above conditional, here could * be a nice generic mechanism to extract two L4 values: * * have a per-protocol array of 4 elements like this: * u8 offset; to take the byte from, off L4 header * u8 mask; to mask it with, before storing * * this way we can describe UDP, TCP and ICMP[46] semantics, * and add a sort of FPM-type behavior for other protocols. * * Of course, is it faster ? and is it needed ? * */ } } /* Session keys match the packets received, and mirror the packets sent */ static void acl_make_5tuple_session_key (int is_input, fa_5tuple_t * p5tuple_pkt, fa_5tuple_t * p5tuple_sess) { int src_index = is_input ? 0 : 1; int dst_index = is_input ? 1 : 0; p5tuple_sess->addr[src_index] = p5tuple_pkt->addr[0]; p5tuple_sess->addr[dst_index] = p5tuple_pkt->addr[1]; p5tuple_sess->l4.as_u64 = p5tuple_pkt->l4.as_u64; p5tuple_sess->l4.port[src_index] = p5tuple_pkt->l4.port[0]; p5tuple_sess->l4.port[dst_index] = p5tuple_pkt->l4.port[1]; } static int acl_fa_ifc_has_sessions (acl_main_t * am, int sw_if_index0) { return am->fa_sessions_hash_is_initialized; } static int acl_fa_ifc_has_in_acl (acl_main_t * am, int sw_if_index0) { int it_has = clib_bitmap_get (am->fa_in_acl_on_sw_if_index, sw_if_index0); return it_has; } static int acl_fa_ifc_has_out_acl (acl_main_t * am, int sw_if_index0) { int it_has = clib_bitmap_get (am->fa_out_acl_on_sw_if_index, sw_if_index0); return it_has; } static int fa_session_get_timeout_type (acl_main_t * am, fa_session_t * sess) { /* seen both SYNs and ACKs but not FINs means we are in establshed state */ u16 masked_flags = sess->tcp_flags_seen.as_u16 & ((TCP_FLAGS_RSTFINACKSYN << 8) + TCP_FLAGS_RSTFINACKSYN); switch (sess->info.l4.proto) { case IPPROTO_TCP: if (((TCP_FLAGS_ACKSYN << 8) + TCP_FLAGS_ACKSYN) == masked_flags) { return ACL_TIMEOUT_TCP_IDLE; } else { return ACL_TIMEOUT_TCP_TRANSIENT; } break; case IPPROTO_UDP: return ACL_TIMEOUT_UDP_IDLE; break; default: return ACL_TIMEOUT_UDP_IDLE; } } static u64 fa_session_get_shortest_timeout(acl_main_t * am) { int timeout_type; u64 timeout = ~0LL; for(timeout_type = 0; timeout_type < ACL_N_TIMEOUTS; timeout_type++) { if (timeout > am->session_timeout_sec[timeout_type]) { timeout = am->session_timeout_sec[timeout_type]; } } return timeout; } /* * Get the timeout of the session in a list since its enqueue time. */ static u64 fa_session_get_list_timeout (acl_main_t * am, fa_session_t * sess) { u64 timeout = am->vlib_main->clib_time.clocks_per_second; /* * we have the shortest possible timeout type in all the lists * (see README-multicore for the rationale) */ timeout *= fa_session_get_shortest_timeout(am); return timeout; } /* * Get the idle timeout of a session. */ static u64 fa_session_get_timeout (acl_main_t * am, fa_session_t * sess) { u64 timeout = am->vlib_main->clib_time.clocks_per_second; int timeout_type = fa_session_get_timeout_type (am, sess); timeout *= am->session_timeout_sec[timeout_type]; return timeout; } static void acl_fa_ifc_init_sessions (acl_main_t * am, int sw_if_index0) { /// FIXME-MULTICORE: lock around this function #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("Initializing bihash for sw_if_index %d num buckets %lu memory size %llu", sw_if_index0, am->fa_conn_table_hash_num_buckets, am->fa_conn_table_hash_memory_size); #endif BV (clib_bihash_init) (&am->fa_sessions_hash, "ACL plugin FA session bihash", am->fa_conn_table_hash_num_buckets, am->fa_conn_table_hash_memory_size); am->fa_sessions_hash_is_initialized = 1; } static inline fa_session_t *get_session_ptr(acl_main_t *am, u16 thread_index, u32 session_index) { acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index]; fa_session_t *sess = pw->fa_sessions_pool + session_index; return sess; } static void acl_fa_conn_list_add_session (acl_main_t * am, fa_full_session_id_t sess_id, u64 now) { fa_session_t *sess = get_session_ptr(am, sess_id.thread_index, sess_id.session_index); u8 list_id = fa_session_get_timeout_type(am, sess); uword thread_index = os_get_thread_index (); acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index]; /* the retrieved session thread index must be necessarily the same as the one in the key */ ASSERT (sess->thread_index == sess_id.thread_index); /* the retrieved session thread index must be the same as current thread */ ASSERT (sess->thread_index == thread_index); sess->link_enqueue_time = now; sess->link_list_id = list_id; sess->link_next_idx = ~0; sess->link_prev_idx = pw->fa_conn_list_tail[list_id]; if (~0 != pw->fa_conn_list_tail[list_id]) { fa_session_t *prev_sess = get_session_ptr(am, thread_index, pw->fa_conn_list_tail[list_id]); prev_sess->link_next_idx = sess_id.session_index; /* We should never try to link with a session on another thread */ ASSERT(prev_sess->thread_index == sess->thread_index); } pw->fa_conn_list_tail[list_id] = sess_id.session_index; pw->serviced_sw_if_index_bitmap = clib_bitmap_set(pw->serviced_sw_if_index_bitmap, sess->sw_if_index, 1); if (~0 == pw->fa_conn_list_head[list_id]) { pw->fa_conn_list_head[list_id] = sess_id.session_index; /* If it is a first conn in any list, kick the cleaner */ vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index, ACL_FA_CLEANER_RESCHEDULE, 0); } } static int acl_fa_conn_list_delete_session (acl_main_t *am, fa_full_session_id_t sess_id) { uword thread_index = os_get_thread_index (); acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index]; if (thread_index != sess_id.thread_index) { /* If another thread attempts to delete the session, fail it. */ #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("thread id in key %d != curr thread index, not deleting"); #endif return 0; } fa_session_t *sess = get_session_ptr(am, sess_id.thread_index, sess_id.session_index); /* we should never try to delete the session with another thread index */ ASSERT(sess->thread_index == thread_index); if (~0 != sess->link_prev_idx) { fa_session_t *prev_sess = get_session_ptr(am, thread_index, sess->link_prev_idx); /* the previous session must be in the same list as this one */ ASSERT(prev_sess->link_list_id == sess->link_list_id); prev_sess->link_next_idx = sess->link_next_idx; } if (~0 != sess->link_next_idx) { fa_session_t *next_sess = get_session_ptr(am, thread_index, sess->link_next_idx); /* The next session must be in the same list as the one we are deleting */ ASSERT(next_sess->link_list_id == sess->link_list_id); next_sess->link_prev_idx = sess->link_prev_idx; } if (pw->fa_conn_list_head[sess->link_list_id] == sess_id.session_index) { pw->fa_conn_list_head[sess->link_list_id] = sess->link_next_idx; } if (pw->fa_conn_list_tail[sess->link_list_id] == sess_id.session_index) { pw->fa_conn_list_tail[sess->link_list_id] = sess->link_prev_idx; } return 1; } static int acl_fa_restart_timer_for_session (acl_main_t * am, u64 now, fa_full_session_id_t sess_id) { if (acl_fa_conn_list_delete_session(am, sess_id)) { acl_fa_conn_list_add_session(am, sess_id, now); return 1; } else { /* * Our thread does not own this connection, so we can not delete * The session. To avoid the complicated signaling, we simply * pick the list waiting time to be the shortest of the timeouts. * This way we do not have to do anything special, and let * the regular requeue check take care of everything. */ return 0; } } static u8 acl_fa_track_session (acl_main_t * am, int is_input, u32 sw_if_index, u64 now, fa_session_t * sess, fa_5tuple_t * pkt_5tuple) { sess->last_active_time = now; if (pkt_5tuple->pkt.tcp_flags_valid) { sess->tcp_flags_seen.as_u8[is_input] |= pkt_5tuple->pkt.tcp_flags; } return 3; } static void acl_fa_delete_session (acl_main_t * am, u32 sw_if_index, fa_full_session_id_t sess_id) { fa_session_t *sess = get_session_ptr(am, sess_id.thread_index, sess_id.session_index); ASSERT(sess->thread_index == os_get_thread_index ()); BV (clib_bihash_add_del) (&am->fa_sessions_hash, &sess->info.kv, 0); acl_fa_per_worker_data_t *pw = &am->per_worker_data[sess_id.thread_index]; pool_put_index (pw->fa_sessions_pool, sess_id.session_index); /* Deleting from timer structures not needed, as the caller must have dealt with the timers. */ vec_validate (am->fa_session_dels_by_sw_if_index, sw_if_index); am->fa_session_dels_by_sw_if_index[sw_if_index]++; clib_smp_atomic_add(&am->fa_session_total_dels, 1); } static int acl_fa_can_add_session (acl_main_t * am, int is_input, u32 sw_if_index) { u64 curr_sess_count; curr_sess_count = am->fa_session_total_adds - am->fa_session_total_dels; return (curr_sess_count < am->fa_conn_table_max_entries); } static u64 acl_fa_get_list_head_expiry_time(acl_main_t *am, acl_fa_per_worker_data_t *pw, u64 now, u16 thread_index, int timeout_type) { if (~0 == pw->fa_conn_list_head[timeout_type]) { return ~0LL; // infinity. } else { fa_session_t *sess = get_session_ptr(am, thread_index, pw->fa_conn_list_head[timeout_type]); u64 timeout_time = sess->link_enqueue_time + fa_session_get_list_timeout (am, sess); return timeout_time; } } static int acl_fa_conn_time_to_check (acl_main_t *am, acl_fa_per_worker_data_t *pw, u64 now, u16 thread_index, u32 session_index) { fa_session_t *sess = get_session_ptr(am, thread_index, session_index); u64 timeout_time = sess->link_enqueue_time + fa_session_get_list_timeout (am, sess); return (timeout_time < now) || (sess->link_enqueue_time <= pw->swipe_end_time); } /* * see if there are sessions ready to be checked, * do the maintenance (requeue or delete), and * return the total number of sessions reclaimed. */ static int acl_fa_check_idle_sessions(acl_main_t *am, u16 thread_index, u64 now) { acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index]; fa_full_session_id_t fsid; fsid.thread_index = thread_index; int total_expired = 0; { u8 tt = 0; for(tt = 0; tt < ACL_N_TIMEOUTS; tt++) { while((vec_len(pw->expired) < am->fa_max_deleted_sessions_per_interval) && (~0 != pw->fa_conn_list_head[tt]) && (acl_fa_conn_time_to_check(am, pw, now, thread_index, pw->fa_conn_list_head[tt]))) { fsid.session_index = pw->fa_conn_list_head[tt]; vec_add1(pw->expired, fsid.session_index); acl_fa_conn_list_delete_session(am, fsid); } } } u32 *psid = NULL; vec_foreach (psid, pw->expired) { fsid.session_index = *psid; if (!pool_is_free_index (pw->fa_sessions_pool, fsid.session_index)) { fa_session_t *sess = get_session_ptr(am, thread_index, fsid.session_index); u32 sw_if_index = sess->sw_if_index; u64 sess_timeout_time = sess->last_active_time + fa_session_get_timeout (am, sess); if ((now < sess_timeout_time) && (0 == clib_bitmap_get(pw->pending_clear_sw_if_index_bitmap, sw_if_index))) { #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_CLEAN: Restarting timer for session %d", (int) session_index); #endif /* There was activity on the session, so the idle timeout has not passed. Enqueue for another time period. */ acl_fa_conn_list_add_session(am, fsid, now); pw->cnt_session_timer_restarted++; } else { #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_CLEAN: Deleting session %d", (int) session_index); #endif acl_fa_delete_session (am, sw_if_index, fsid); pw->cnt_deleted_sessions++; } } else { pw->cnt_already_deleted_sessions++; } } total_expired = vec_len(pw->expired); /* zero out the vector which we have acted on */ if (pw->expired) _vec_len (pw->expired) = 0; /* if we were advancing and reached the end * (no more sessions to recycle), reset the fast-forward timestamp */ if (pw->swipe_end_time && 0 == total_expired) pw->swipe_end_time = 0; return (total_expired); } always_inline void acl_fa_try_recycle_session (acl_main_t * am, int is_input, u16 thread_index, u32 sw_if_index) { /* try to recycle a TCP transient session */ acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index]; u8 timeout_type = ACL_TIMEOUT_TCP_TRANSIENT; fa_full_session_id_t sess_id; sess_id.session_index = pw->fa_conn_list_head[timeout_type]; if (~0 != sess_id.session_index) { sess_id.thread_index = thread_index; acl_fa_conn_list_delete_session(am, sess_id); acl_fa_delete_session(am, sw_if_index, sess_id); } } static void acl_fa_add_session (acl_main_t * am, int is_input, u32 sw_if_index, u64 now, fa_5tuple_t * p5tuple) { clib_bihash_kv_40_8_t *pkv = &p5tuple->kv; clib_bihash_kv_40_8_t kv; fa_full_session_id_t f_sess_id; uword thread_index = os_get_thread_index(); acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index]; f_sess_id.thread_index = thread_index; fa_session_t *sess; pool_get_aligned (pw->fa_sessions_pool, sess, CLIB_CACHE_LINE_BYTES); f_sess_id.session_index = sess - pw->fa_sessions_pool; kv.key[0] = pkv->key[0]; kv.key[1] = pkv->key[1]; kv.key[2] = pkv->key[2]; kv.key[3] = pkv->key[3]; kv.key[4] = pkv->key[4]; kv.value = f_sess_id.as_u64; memcpy (sess, pkv, sizeof (pkv->key)); sess->last_active_time = now; sess->sw_if_index = sw_if_index; sess->tcp_flags_seen.as_u16 = 0; sess->thread_index = thread_index; sess->link_list_id = ~0; sess->link_prev_idx = ~0; sess->link_next_idx = ~0; if (!acl_fa_ifc_has_sessions (am, sw_if_index)) { acl_fa_ifc_init_sessions (am, sw_if_index); } BV (clib_bihash_add_del) (&am->fa_sessions_hash, &kv, 1); acl_fa_conn_list_add_session(am, f_sess_id, now); vec_validate (am->fa_session_adds_by_sw_if_index, sw_if_index); am->fa_session_adds_by_sw_if_index[sw_if_index]++; clib_smp_atomic_add(&am->fa_session_total_adds, 1); } static int acl_fa_find_session (acl_main_t * am, u32 sw_if_index0, fa_5tuple_t * p5tuple, clib_bihash_kv_40_8_t * pvalue_sess) { return (BV (clib_bihash_search) (&am->fa_sessions_hash, &p5tuple->kv, pvalue_sess) == 0); } always_inline uword acl_fa_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, int is_ip6, int is_input, int is_l2_path, u32 * l2_feat_next_node_index, vlib_node_registration_t * acl_fa_node) { u32 n_left_from, *from, *to_next; acl_fa_next_t next_index; u32 pkts_acl_checked = 0; u32 pkts_new_session = 0; u32 pkts_exist_session = 0; u32 pkts_acl_permit = 0; u32 pkts_restart_session_timer = 0; u32 trace_bitmap = 0; u32 feature_bitmap0; acl_main_t *am = &acl_main; fa_5tuple_t fa_5tuple, kv_sess; clib_bihash_kv_40_8_t value_sess; vlib_node_runtime_t *error_node; u64 now = clib_cpu_time_now (); uword thread_index = os_get_thread_index (); from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; error_node = vlib_node_get_runtime (vm, acl_fa_node->index); while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; u32 next0 = 0; u8 action = 0; u32 sw_if_index0; int acl_check_needed = 1; u32 match_acl_in_index = ~0; u32 match_rule_index = ~0; u8 error0 = 0; /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); if (is_input) sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; else sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; if (is_l2_path) feature_bitmap0 = vnet_buffer (b0)->l2.feature_bitmap; /* * Extract the L3/L4 matching info into a 5-tuple structure, * then create a session key whose layout is independent on forward or reverse * direction of the packet. */ acl_fill_5tuple (am, b0, is_ip6, is_input, is_l2_path, &fa_5tuple); fa_5tuple.l4.lsb_of_sw_if_index = sw_if_index0 & 0xffff; acl_make_5tuple_session_key (is_input, &fa_5tuple, &kv_sess); fa_5tuple.pkt.sw_if_index = sw_if_index0; fa_5tuple.pkt.is_ip6 = is_ip6; fa_5tuple.pkt.is_input = is_input; fa_5tuple.pkt.mask_type_index_lsb = ~0; #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_DBG: session 5-tuple %016llx %016llx %016llx %016llx %016llx : %016llx", kv_sess.kv.key[0], kv_sess.kv.key[1], kv_sess.kv.key[2], kv_sess.kv.key[3], kv_sess.kv.key[4], kv_sess.kv.value); clib_warning ("ACL_FA_NODE_DBG: packet 5-tuple %016llx %016llx %016llx %016llx %016llx : %016llx", fa_5tuple.kv.key[0], fa_5tuple.kv.key[1], fa_5tuple.kv.key[2], fa_5tuple.kv.key[3], fa_5tuple.kv.key[4], fa_5tuple.kv.value); #endif /* Try to match an existing session first */ if (acl_fa_ifc_has_sessions (am, sw_if_index0)) { if (acl_fa_find_session (am, sw_if_index0, &kv_sess, &value_sess)) { trace_bitmap |= 0x80000000; error0 = ACL_FA_ERROR_ACL_EXIST_SESSION; fa_full_session_id_t f_sess_id; f_sess_id.as_u64 = value_sess.value; ASSERT(f_sess_id.thread_index < vec_len(vlib_mains)); fa_session_t *sess = get_session_ptr(am, f_sess_id.thread_index, f_sess_id.session_index); int old_timeout_type = fa_session_get_timeout_type (am, sess); action = acl_fa_track_session (am, is_input, sw_if_index0, now, sess, &fa_5tuple); /* expose the session id to the tracer */ match_rule_index = f_sess_id.session_index; int new_timeout_type = fa_session_get_timeout_type (am, sess); acl_check_needed = 0; pkts_exist_session += 1; /* Tracking might have changed the session timeout type, e.g. from transient to established */ if (PREDICT_FALSE (old_timeout_type != new_timeout_type)) { acl_fa_restart_timer_for_session (am, now, f_sess_id); pkts_restart_session_timer++; trace_bitmap |= 0x00010000 + ((0xff & old_timeout_type) << 8) + (0xff & new_timeout_type); } /* * I estimate the likelihood to be very low - the VPP needs * to have >64K interfaces to start with and then on * exactly 64K indices apart needs to be exactly the same * 5-tuple... Anyway, since this probability is nonzero - * print an error and drop the unlucky packet. * If this shows up in real world, we would need to bump * the hash key length. */ if (PREDICT_FALSE(sess->sw_if_index != sw_if_index0)) { clib_warning("BUG: session LSB16(sw_if_index) and 5-tuple collision!"); acl_check_needed = 0; action = 0; } } } if (acl_check_needed) { action = multi_acl_match_5tuple (sw_if_index0, &fa_5tuple, is_l2_path, is_ip6, is_input, &match_acl_in_index, &match_rule_index, &trace_bitmap); error0 = action; if (1 == action) pkts_acl_permit += 1; if (2 == action) { if (!acl_fa_can_add_session (am, is_input, sw_if_index0)) acl_fa_try_recycle_session (am, is_input, thread_index, sw_if_index0); if (acl_fa_can_add_session (am, is_input, sw_if_index0)) { acl_fa_add_session (am, is_input, sw_if_index0, now, &kv_sess); pkts_new_session += 1; } else { action = 0; error0 = ACL_FA_ERROR_ACL_TOO_MANY_SESSIONS; } } } if (action > 0) { if (is_l2_path) next0 = feat_bitmap_get_next_node_index (l2_feat_next_node_index, feature_bitmap0); else vnet_feature_next (sw_if_index0, &next0, b0); } if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { acl_fa_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->sw_if_index = sw_if_index0; t->next_index = next0; t->match_acl_in_index = match_acl_in_index; t->match_rule_index = match_rule_index; t->packet_info[0] = fa_5tuple.kv.key[0]; t->packet_info[1] = fa_5tuple.kv.key[1]; t->packet_info[2] = fa_5tuple.kv.key[2]; t->packet_info[3] = fa_5tuple.kv.key[3]; t->packet_info[4] = fa_5tuple.kv.key[4]; t->packet_info[5] = fa_5tuple.kv.value; t->action = action; t->trace_bitmap = trace_bitmap; } next0 = next0 < node->n_next_nodes ? next0 : 0; if (0 == next0) b0->error = error_node->errors[error0]; pkts_acl_checked += 1; /* verify speculative enqueue, maybe switch current next frame */ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } vlib_node_increment_counter (vm, acl_fa_node->index, ACL_FA_ERROR_ACL_CHECK, pkts_acl_checked); vlib_node_increment_counter (vm, acl_fa_node->index, ACL_FA_ERROR_ACL_PERMIT, pkts_acl_permit); vlib_node_increment_counter (vm, acl_fa_node->index, ACL_FA_ERROR_ACL_NEW_SESSION, pkts_new_session); vlib_node_increment_counter (vm, acl_fa_node->index, ACL_FA_ERROR_ACL_EXIST_SESSION, pkts_exist_session); vlib_node_increment_counter (vm, acl_fa_node->index, ACL_FA_ERROR_ACL_RESTART_SESSION_TIMER, pkts_restart_session_timer); return frame->n_vectors; } vlib_node_registration_t acl_in_l2_ip6_node; static uword acl_in_ip6_l2_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { acl_main_t *am = &acl_main; return acl_fa_node_fn (vm, node, frame, 1, 1, 1, am->fa_acl_in_ip6_l2_node_feat_next_node_index, &acl_in_l2_ip6_node); } vlib_node_registration_t acl_in_l2_ip4_node; static uword acl_in_ip4_l2_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { acl_main_t *am = &acl_main; return acl_fa_node_fn (vm, node, frame, 0, 1, 1, am->fa_acl_in_ip4_l2_node_feat_next_node_index, &acl_in_l2_ip4_node); } vlib_node_registration_t acl_out_l2_ip6_node; static uword acl_out_ip6_l2_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { acl_main_t *am = &acl_main; return acl_fa_node_fn (vm, node, frame, 1, 0, 1, am->fa_acl_out_ip6_l2_node_feat_next_node_index, &acl_out_l2_ip6_node); } vlib_node_registration_t acl_out_l2_ip4_node; static uword acl_out_ip4_l2_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { acl_main_t *am = &acl_main; return acl_fa_node_fn (vm, node, frame, 0, 0, 1, am->fa_acl_out_ip4_l2_node_feat_next_node_index, &acl_out_l2_ip4_node); } /**** L3 processing path nodes ****/ vlib_node_registration_t acl_in_fa_ip6_node; static uword acl_in_ip6_fa_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return acl_fa_node_fn (vm, node, frame, 1, 1, 0, 0, &acl_in_fa_ip6_node); } vlib_node_registration_t acl_in_fa_ip4_node; static uword acl_in_ip4_fa_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return acl_fa_node_fn (vm, node, frame, 0, 1, 0, 0, &acl_in_fa_ip4_node); } vlib_node_registration_t acl_out_fa_ip6_node; static uword acl_out_ip6_fa_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return acl_fa_node_fn (vm, node, frame, 1, 0, 0, 0, &acl_out_fa_ip6_node); } vlib_node_registration_t acl_out_fa_ip4_node; static uword acl_out_ip4_fa_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return acl_fa_node_fn (vm, node, frame, 0, 0, 0, 0, &acl_out_fa_ip4_node); } /* * This process ensures the connection cleanup happens every so often * even in absence of traffic, as well as provides general orchestration * for requests like connection deletion on a given sw_if_index. */ /* *INDENT-OFF* */ #define foreach_acl_fa_cleaner_error \ _(UNKNOWN_EVENT, "unknown event received") \ /* end of errors */ typedef enum { #define _(sym,str) ACL_FA_CLEANER_ERROR_##sym, foreach_acl_fa_cleaner_error #undef _ ACL_FA_CLEANER_N_ERROR, } acl_fa_cleaner_error_t; static char *acl_fa_cleaner_error_strings[] = { #define _(sym,string) string, foreach_acl_fa_cleaner_error #undef _ }; /* *INDENT-ON* */ static vlib_node_registration_t acl_fa_session_cleaner_process_node; static vlib_node_registration_t acl_fa_worker_session_cleaner_process_node; /* * Per-worker thread interrupt-driven cleaner thread * to clean idle connections if there are no packets */ static uword acl_fa_worker_conn_cleaner_process(vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { acl_main_t *am = &acl_main; u64 now = clib_cpu_time_now (); u16 thread_index = os_get_thread_index (); acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index]; int num_expired; #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("\nacl_fa_worker_conn_cleaner: thread index %d now %lu\n\n", thread_index, now); #endif /* allow another interrupt to be queued */ pw->interrupt_is_pending = 0; if (pw->clear_in_process) { if (0 == pw->swipe_end_time) { /* * Someone has just set the flag to start clearing. * we do this by combing through the connections up to a "time T" * which is now, and requeueing everything except the expired * connections and those matching the interface(s) being cleared. */ /* * first filter the sw_if_index bitmap that they want from us, by * a bitmap of sw_if_index for which we actually have connections. */ if ((pw->pending_clear_sw_if_index_bitmap == 0) || (pw->serviced_sw_if_index_bitmap == 0)) { #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("WORKER-CLEAR: someone tried to call clear, but one of the bitmaps are empty"); #endif clib_bitmap_zero(pw->pending_clear_sw_if_index_bitmap); } else { #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("WORKER-CLEAR: (before and) swiping sw-if-index bitmap: %U, my serviced bitmap %U", format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap, format_bitmap_hex, pw->serviced_sw_if_index_bitmap); #endif pw->pending_clear_sw_if_index_bitmap = clib_bitmap_and(pw->pending_clear_sw_if_index_bitmap, pw->serviced_sw_if_index_bitmap); } if (clib_bitmap_is_zero(pw->pending_clear_sw_if_index_bitmap)) { /* if the cross-section is a zero vector, no need to do anything. */ #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("WORKER: clearing done - nothing to do"); #endif pw->clear_in_process = 0; } else { #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("WORKER-CLEAR: swiping sw-if-index bitmap: %U, my serviced bitmap %U", format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap, format_bitmap_hex, pw->serviced_sw_if_index_bitmap); #endif /* swipe through the connection lists until enqueue timestamps become above "now" */ pw->swipe_end_time = now; } } } num_expired = acl_fa_check_idle_sessions(am, thread_index, now); // clib_warning("WORKER-CLEAR: checked %d sessions (clear_in_progress: %d)", num_expired, pw->clear_in_process); if (pw->clear_in_process) { if (0 == num_expired) { /* we were clearing but we could not process any more connections. time to stop. */ clib_bitmap_zero(pw->pending_clear_sw_if_index_bitmap); pw->clear_in_process = 0; #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("WORKER: clearing done, all done"); #endif } else { #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("WORKER-CLEAR: more work to do, raising interrupt"); #endif /* should continue clearing.. So could they please sent an interrupt again? */ pw->interrupt_is_needed = 1; } } else { if (num_expired >= am->fa_max_deleted_sessions_per_interval) { /* there was too much work, we should get an interrupt ASAP */ pw->interrupt_is_needed = 1; } else if (num_expired <= am->fa_min_deleted_sessions_per_interval) { /* signal that they should trigger us less */ pw->interrupt_is_unwanted = 1; } else { /* the current rate of interrupts is ok */ pw->interrupt_is_needed = 0; pw->interrupt_is_unwanted = 0; } } return 0; } static void send_one_worker_interrupt (vlib_main_t * vm, acl_main_t *am, int thread_index) { acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index]; if (!pw->interrupt_is_pending) { vlib_node_set_interrupt_pending (vlib_mains[thread_index], acl_fa_worker_session_cleaner_process_node.index); pw->interrupt_is_pending = 1; /* if the interrupt was requested, mark that done. */ pw->interrupt_is_needed = 0; } } static void send_interrupts_to_workers (vlib_main_t * vm, acl_main_t *am) { int i; /* Can't use vec_len(am->per_worker_data) since the threads might not have come up yet; */ int n_threads = vec_len(vlib_mains); for (i = n_threads > 1 ? 1 : 0; i < n_threads; i++) { send_one_worker_interrupt(vm, am, i); } } /* centralized process to drive per-worker cleaners */ static uword acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { acl_main_t *am = &acl_main; u64 now = clib_cpu_time_now (); f64 cpu_cps = vm->clib_time.clocks_per_second; u64 next_expire; /* We should check if there are connections to clean up - at least twice a second */ u64 max_timer_wait_interval = cpu_cps / 2; uword event_type, *event_data = 0; acl_fa_per_worker_data_t *pw0; am->fa_current_cleaner_timer_wait_interval = max_timer_wait_interval; am->fa_cleaner_node_index = acl_fa_session_cleaner_process_node.index; while (1) { now = clib_cpu_time_now (); next_expire = now + am->fa_current_cleaner_timer_wait_interval; int has_pending_conns = 0; u16 ti; u8 tt; /* * walk over all per-thread list heads of different timeouts, * and see if there are any connections pending. * If there aren't - we do not need to wake up until the * worker code signals that it has added a connection. * * Also, while we are at it, calculate the earliest we need to wake up. */ for(ti = 0; ti < vec_len(vlib_mains); ti++) { if (ti >= vec_len(am->per_worker_data)) { continue; } acl_fa_per_worker_data_t *pw = &am->per_worker_data[ti]; for(tt = 0; tt < vec_len(pw->fa_conn_list_head); tt++) { u64 head_expiry = acl_fa_get_list_head_expiry_time(am, pw, now, ti, tt); if ((head_expiry < next_expire) && !pw->interrupt_is_pending) { #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("Head expiry: %lu, now: %lu, next_expire: %lu (worker: %d, tt: %d)", head_expiry, now, next_expire, ti, tt); #endif next_expire = head_expiry; } if (~0 != pw->fa_conn_list_head[tt]) { has_pending_conns = 1; } } } /* If no pending connections then no point in timing out */ if (!has_pending_conns) { am->fa_cleaner_cnt_wait_without_timeout++; (void) vlib_process_wait_for_event (vm); event_type = vlib_process_get_events (vm, &event_data); } else { f64 timeout = ((i64) next_expire - (i64) now) / cpu_cps; if (timeout <= 0) { /* skip waiting altogether */ event_type = ~0; } else { am->fa_cleaner_cnt_wait_with_timeout++; (void) vlib_process_wait_for_event_or_clock (vm, timeout); event_type = vlib_process_get_events (vm, &event_data); } } now = clib_cpu_time_now (); switch (event_type) { case ~0: /* nothing to do */ break; case ACL_FA_CLEANER_RESCHEDULE: /* Nothing to do. */ break; case ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX: { uword *clear_sw_if_index_bitmap = 0; uword *sw_if_index0; #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX received"); #endif vec_foreach (sw_if_index0, event_data) { am->fa_cleaner_cnt_delete_by_sw_index++; #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL_FA_NODE_CLEAN: ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX: %d", *sw_if_index0); #endif clear_sw_if_index_bitmap = clib_bitmap_set(clear_sw_if_index_bitmap, *sw_if_index0, 1); } #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX bitmap: %U", format_bitmap_hex, clear_sw_if_index_bitmap); #endif vec_foreach(pw0, am->per_worker_data) { CLIB_MEMORY_BARRIER (); while (pw0->clear_in_process) { CLIB_MEMORY_BARRIER (); #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("ACL_FA_NODE_CLEAN: waiting previous cleaning cycle to finish on %d...", pw0 - am->per_worker_data); #endif vlib_process_suspend(vm, 0.0001); if (pw0->interrupt_is_needed) { send_one_worker_interrupt(vm, am, (pw0 - am->per_worker_data)); } } if (pw0->clear_in_process) { clib_warning("ERROR-BUG! Could not initiate cleaning on worker because another cleanup in progress"); } else { pw0->pending_clear_sw_if_index_bitmap = clib_bitmap_dup(clear_sw_if_index_bitmap); pw0->clear_in_process = 1; } } /* send some interrupts so they can start working */ send_interrupts_to_workers(vm, am); /* now wait till they all complete */ #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("CLEANER mains len: %d per-worker len: %d", vec_len(vlib_mains), vec_len(am->per_worker_data)); #endif vec_foreach(pw0, am->per_worker_data) { CLIB_MEMORY_BARRIER (); while (pw0->clear_in_process) { CLIB_MEMORY_BARRIER (); #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("ACL_FA_NODE_CLEAN: waiting for my cleaning cycle to finish on %d...", pw0 - am->per_worker_data); #endif vlib_process_suspend(vm, 0.0001); if (pw0->interrupt_is_needed) { send_one_worker_interrupt(vm, am, (pw0 - am->per_worker_data)); } } } #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("ACL_FA_NODE_CLEAN: cleaning done"); #endif clib_bitmap_free(clear_sw_if_index_bitmap); } break; default: #ifdef FA_NODE_VERBOSE_DEBUG clib_warning ("ACL plugin connection cleaner: unknown event %u", event_type); #endif vlib_node_increment_counter (vm, acl_fa_session_cleaner_process_node. index, ACL_FA_CLEANER_ERROR_UNKNOWN_EVENT, 1); am->fa_cleaner_cnt_unknown_event++; break; } send_interrupts_to_workers(vm, am); if (event_data) _vec_len (event_data) = 0; int interrupts_needed = 0; int interrupts_unwanted = 0; vec_foreach(pw0, am->per_worker_data) { if (pw0->interrupt_is_needed) { interrupts_needed++; /* the per-worker value is reset when sending the interrupt */ } if (pw0->interrupt_is_unwanted) { interrupts_unwanted++; pw0->interrupt_is_unwanted = 0; } } if (interrupts_needed) { /* they need more interrupts, do less waiting around next time */ am->fa_current_cleaner_timer_wait_interval /= 2; } else if (interrupts_unwanted) { /* slowly increase the amount of sleep up to a limit */ if (am->fa_current_cleaner_timer_wait_interval < max_timer_wait_interval) am->fa_current_cleaner_timer_wait_interval += cpu_cps * am->fa_cleaner_wait_time_increment; } am->fa_cleaner_cnt_event_cycles++; } /* NOT REACHED */ return 0; } void acl_fa_enable_disable (u32 sw_if_index, int is_input, int enable_disable) { acl_main_t *am = &acl_main; if (is_input) { vnet_feature_enable_disable ("ip4-unicast", "acl-plugin-in-ip4-fa", sw_if_index, enable_disable, 0, 0); vnet_feature_enable_disable ("ip6-unicast", "acl-plugin-in-ip6-fa", sw_if_index, enable_disable, 0, 0); am->fa_in_acl_on_sw_if_index = clib_bitmap_set (am->fa_in_acl_on_sw_if_index, sw_if_index, enable_disable); } else { vnet_feature_enable_disable ("ip4-output", "acl-plugin-out-ip4-fa", sw_if_index, enable_disable, 0, 0); vnet_feature_enable_disable ("ip6-output", "acl-plugin-out-ip6-fa", sw_if_index, enable_disable, 0, 0); am->fa_out_acl_on_sw_if_index = clib_bitmap_set (am->fa_out_acl_on_sw_if_index, sw_if_index, enable_disable); } if ((!enable_disable) && (!acl_fa_ifc_has_in_acl (am, sw_if_index)) && (!acl_fa_ifc_has_out_acl (am, sw_if_index))) { #ifdef FA_NODE_VERBOSE_DEBUG clib_warning("ENABLE-DISABLE: clean the connections on interface %d", sw_if_index); #endif vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index, ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX, sw_if_index); } } void show_fa_sessions_hash(vlib_main_t * vm, u32 verbose) { acl_main_t *am = &acl_main; if (am->fa_sessions_hash_is_initialized) { vlib_cli_output(vm, "\nSession lookup hash table:\n%U\n\n", BV (format_bihash), &am->fa_sessions_hash, verbose); } else { vlib_cli_output(vm, "\nSession lookup hash table is not allocated.\n\n"); } } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (acl_fa_worker_session_cleaner_process_node, static) = { .function = acl_fa_worker_conn_cleaner_process, .name = "acl-plugin-fa-worker-cleaner-process", .type = VLIB_NODE_TYPE_INPUT, .state = VLIB_NODE_STATE_INTERRUPT, }; VLIB_REGISTER_NODE (acl_fa_session_cleaner_process_node, static) = { .function = acl_fa_session_cleaner_process, .type = VLIB_NODE_TYPE_PROCESS, .name = "acl-plugin-fa-cleaner-process", .n_errors = ARRAY_LEN (acl_fa_cleaner_error_strings), .error_strings = acl_fa_cleaner_error_strings, .n_next_nodes = 0, .next_nodes = {}, }; VLIB_REGISTER_NODE (acl_in_l2_ip6_node) = { .function = acl_in_ip6_l2_node_fn, .name = "acl-plugin-in-ip6-l2", .vector_size = sizeof (u32), .format_trace = format_acl_fa_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (acl_fa_error_strings), .error_strings = acl_fa_error_strings, .n_next_nodes = ACL_FA_N_NEXT, .next_nodes = { [ACL_FA_ERROR_DROP] = "error-drop", } }; VLIB_REGISTER_NODE (acl_in_l2_ip4_node) = { .function = acl_in_ip4_l2_node_fn, .name = "acl-plugin-in-ip4-l2", .vector_size = sizeof (u32), .format_trace = format_acl_fa_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (acl_fa_error_strings), .error_strings = acl_fa_error_strings, .n_next_nodes = ACL_FA_N_NEXT, .next_nodes = { [ACL_FA_ERROR_DROP] = "error-drop", } }; VLIB_REGISTER_NODE (acl_out_l2_ip6_node) = { .function = acl_out_ip6_l2_node_fn, .name = "acl-plugin-out-ip6-l2", .vector_size = sizeof (u32), .format_trace = format_acl_fa_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (acl_fa_error_strings), .error_strings = acl_fa_error_strings, .n_next_nodes = ACL_FA_N_NEXT, .next_nodes = { [ACL_FA_ERROR_DROP] = "error-drop", } }; VLIB_REGISTER_NODE (acl_out_l2_ip4_node) = { .function = acl_out_ip4_l2_node_fn, .name = "acl-plugin-out-ip4-l2", .vector_size = sizeof (u32), .format_trace = format_acl_fa_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (acl_fa_error_strings), .error_strings = acl_fa_error_strings, .n_next_nodes = ACL_FA_N_NEXT, .next_nodes = { [ACL_FA_ERROR_DROP] = "error-drop", } }; VLIB_REGISTER_NODE (acl_in_fa_ip6_node) = { .function = acl_in_ip6_fa_node_fn, .name = "acl-plugin-in-ip6-fa", .vector_size = sizeof (u32), .format_trace = format_acl_fa_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (acl_fa_error_strings), .error_strings = acl_fa_error_strings, .n_next_nodes = ACL_FA_N_NEXT, .next_nodes = { [ACL_FA_ERROR_DROP] = "error-drop", } }; VNET_FEATURE_INIT (acl_in_ip6_fa_feature, static) = { .arc_name = "ip6-unicast", .node_name = "acl-plugin-in-ip6-fa", .runs_before = VNET_FEATURES ("ip6-flow-classify"), }; VLIB_REGISTER_NODE (acl_in_fa_ip4_node) = { .function = acl_in_ip4_fa_node_fn, .name = "acl-plugin-in-ip4-fa", .vector_size = sizeof (u32), .format_trace = format_acl_fa_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (acl_fa_error_strings), .error_strings = acl_fa_error_strings, .n_next_nodes = ACL_FA_N_NEXT, .next_nodes = { [ACL_FA_ERROR_DROP] = "error-drop", } }; VNET_FEATURE_INIT (acl_in_ip4_fa_feature, static) = { .arc_name = "ip4-unicast", .node_name = "acl-plugin-in-ip4-fa", .runs_before = VNET_FEATURES ("ip4-flow-classify"), }; VLIB_REGISTER_NODE (acl_out_fa_ip6_node) = { .function = acl_out_ip6_fa_node_fn, .name = "acl-plugin-out-ip6-fa", .vector_size = sizeof (u32), .format_trace = format_acl_fa_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (acl_fa_error_strings), .error_strings = acl_fa_error_strings, .n_next_nodes = ACL_FA_N_NEXT, .next_nodes = { [ACL_FA_ERROR_DROP] = "error-drop", } }; VNET_FEATURE_INIT (acl_out_ip6_fa_feature, static) = { .arc_name = "ip6-output", .node_name = "acl-plugin-out-ip6-fa", .runs_before = VNET_FEATURES ("interface-output"), }; VLIB_REGISTER_NODE (acl_out_fa_ip4_node) = { .function = acl_out_ip4_fa_node_fn, .name = "acl-plugin-out-ip4-fa", .vector_size = sizeof (u32), .format_trace = format_acl_fa_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (acl_fa_error_strings), .error_strings = acl_fa_error_strings, .n_next_nodes = ACL_FA_N_NEXT, /* edit / add dispositions here */ .next_nodes = { [ACL_FA_ERROR_DROP] = "error-drop", } }; VNET_FEATURE_INIT (acl_out_ip4_fa_feature, static) = { .arc_name = "ip4-output", .node_name = "acl-plugin-out-ip4-fa", .runs_before = VNET_FEATURES ("interface-output"), }; /* *INDENT-ON* */


context:
space:
mode: