#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vppinfra/error.h>
+
+
#include <acl/acl.h>
-#include "bihash_40_8.h"
+#include <vnet/ip/icmp46_packet.h>
+
+#include <plugins/acl/fa_node.h>
+#include <plugins/acl/acl.h>
+#include <plugins/acl/lookup_context.h>
+#include <plugins/acl/public_inlines.h>
+#include <vppinfra/bihash_40_8.h>
#include <vppinfra/bihash_template.h>
#include <vppinfra/bihash_template.c>
-#include "fa_node.h"
-
typedef struct
{
u32 next_index;
u32 sw_if_index;
+ u32 lc_index;
u32 match_acl_in_index;
u32 match_rule_index;
u64 packet_info[6];
u8 action;
} acl_fa_trace_t;
+/* ICMPv4 invert type for stateful ACL */
+static const u8 icmp4_invmap[] = {
+ [ICMP4_echo_reply] = ICMP4_echo_request + 1,
+ [ICMP4_timestamp_reply] = ICMP4_timestamp_request + 1,
+ [ICMP4_information_reply] = ICMP4_information_request + 1,
+ [ICMP4_address_mask_reply] = ICMP4_address_mask_request + 1
+};
+
+/* Supported ICMPv4 messages for session creation */
+static const u8 icmp4_valid_new[] = {
+ [ICMP4_echo_request] = 1,
+ [ICMP4_timestamp_request] = 1,
+ [ICMP4_information_request] = 1,
+ [ICMP4_address_mask_request] = 1
+};
+
+/* ICMPv6 invert type for stateful ACL */
+static const u8 icmp6_invmap[] = {
+ [ICMP6_echo_reply - 128] = ICMP6_echo_request + 1,
+ [ICMP6_node_information_response - 128] = ICMP6_node_information_request + 1
+};
+
+/* Supported ICMPv6 messages for session creation */
+static const u8 icmp6_valid_new[] = {
+ [ICMP6_echo_request - 128] = 1,
+ [ICMP6_node_information_request - 128] = 1
+};
+
+/* IP4 and IP6 protocol numbers of ICMP */
+static u8 icmp_protos[] = { IP_PROTOCOL_ICMP, IP_PROTOCOL_ICMP6 };
+
+static u8 *
+format_fa_5tuple (u8 * s, va_list * args)
+{
+ fa_5tuple_t *p5t = va_arg (*args, fa_5tuple_t *);
+
+ return format(s, "lc_index %d (lsb16 of sw_if_index %d) l3 %s%s %U -> %U"
+ " l4 proto %d l4_valid %d port %d -> %d tcp flags (%s) %02x rsvd %x",
+ p5t->pkt.lc_index, p5t->l4.lsb_of_sw_if_index, p5t->pkt.is_ip6 ? "ip6" : "ip4",
+ p5t->pkt.is_nonfirst_fragment ? " non-initial fragment" : "",
+ format_ip46_address, &p5t->addr[0], p5t->pkt.is_ip6 ? IP46_TYPE_IP6 : IP46_TYPE_IP4,
+ format_ip46_address, &p5t->addr[1], p5t->pkt.is_ip6 ? IP46_TYPE_IP6 : IP46_TYPE_IP4,
+ p5t->l4.proto, p5t->pkt.l4_valid,
+ p5t->l4.port[0], p5t->l4.port[1],
+ p5t->pkt.tcp_flags_valid ? "valid": "invalid",
+ p5t->pkt.tcp_flags,
+ p5t->pkt.flags_reserved);
+}
+
+u8 *
+format_acl_plugin_5tuple (u8 * s, va_list * args)
+{
+ return format_fa_5tuple(s, args);
+}
+
/* packet trace format function */
static u8 *
format_acl_fa_trace (u8 * s, va_list * args)
s =
format (s,
- "acl-plugin: sw_if_index %d, next index %d, action: %d, match: acl %d rule %d trace_bits %08x\n"
+ "acl-plugin: lc_index: %d, 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->lc_index, 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]);
+
+ /* Now also print out the packet_info in a form usable by humans */
+ s = format (s, "\n %U", format_fa_5tuple, t->packet_info);
return s;
}
};
/* *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)
+acl_fa_ifc_has_sessions (acl_main_t * am, int sw_if_index0)
{
- 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;
- }
+ return am->fa_sessions_hash_is_initialized;
}
static int
-fa_acl_match_port (u16 port, u16 port_first, u16 port_last, int is_ip6)
+acl_fa_ifc_has_in_acl (acl_main_t * am, int sw_if_index0)
{
- return ((port >= port_first) && (port <= port_last));
+ int it_has = clib_bitmap_get (am->fa_in_acl_on_sw_if_index, sw_if_index0);
+ return it_has;
}
-int
-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)
+static int
+acl_fa_ifc_has_out_acl (acl_main_t * am, int sw_if_index0)
{
- 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;
+ int it_has = clib_bitmap_get (am->fa_out_acl_on_sw_if_index, sw_if_index0);
+ return it_has;
}
-static u8
-full_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)
+/* Session keys match the packets received, and mirror the packets sent */
+static u32
+acl_make_5tuple_session_key (acl_main_t * am, int is_input, int is_ip6,
+ u32 sw_if_index, fa_5tuple_t * p5tuple_pkt,
+ fa_5tuple_t * p5tuple_sess)
{
- acl_main_t *am = &acl_main;
- int i;
- u32 *acl_vector;
- u8 action = 0;
+ int src_index = is_input ? 0 : 1;
+ int dst_index = is_input ? 1 : 0;
+ u32 valid_new_sess = 1;
+ 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;
- if (is_input)
+ if (PREDICT_TRUE(p5tuple_pkt->l4.proto != icmp_protos[is_ip6]))
{
- 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];
+ p5tuple_sess->l4.port[src_index] = p5tuple_pkt->l4.port[0];
+ p5tuple_sess->l4.port[dst_index] = p5tuple_pkt->l4.port[1];
}
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 (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 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;
- }
+ static const u8 * icmp_invmap[] = { icmp4_invmap, icmp6_invmap };
+ static const u8 * icmp_valid_new[] = { icmp4_valid_new, icmp6_valid_new };
+ static const u8 icmp_invmap_size[] = { sizeof(icmp4_invmap),
+ sizeof(icmp6_invmap) };
+ static const u8 icmp_valid_new_size[] = { sizeof(icmp4_valid_new),
+ sizeof(icmp6_valid_new) };
+ int type = is_ip6 ? p5tuple_pkt->l4.port[0]-128: p5tuple_pkt->l4.port[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;
+ p5tuple_sess->l4.port[0] = p5tuple_pkt->l4.port[0];
+ p5tuple_sess->l4.port[1] = p5tuple_pkt->l4.port[1];
- 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)))
+ /*
+ * Invert ICMP type for valid icmp_invmap messages:
+ * 1) input node with outbound ACL interface
+ * 2) output node with inbound ACL interface
+ *
+ */
+ if ((is_input && acl_fa_ifc_has_out_acl(am, sw_if_index)) ||
+ (!is_input && acl_fa_ifc_has_in_acl(am, sw_if_index)))
{
- p5tuple_pkt->pkt.is_nonfirst_fragment = 1;
- /* invalidate L4 offset so we don't try to find L4 info */
- l4_offset += b0->current_length;
+ if (type >= 0 &&
+ type <= icmp_invmap_size[is_ip6] &&
+ icmp_invmap[is_ip6][type])
+ {
+ p5tuple_sess->l4.port[0] = icmp_invmap[is_ip6][type] - 1;
+ }
}
- }
- 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 ?
- *
+ * ONLY ICMP messages defined in icmp4_valid_new/icmp6_valid_new table
+ * are allowed to create stateful ACL.
+ * The other messages will be forwarded without creating a reflexive ACL.
*/
+ if (type < 0 ||
+ type > icmp_valid_new_size[is_ip6] ||
+ !icmp_valid_new[is_ip6][type])
+ {
+ valid_new_sess = 0;
+ }
}
-}
-
-/* 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)
-{
- int has_sessions =
- clib_bitmap_get (am->fa_sessions_on_sw_if_index, sw_if_index0);
- return has_sessions;
-}
-
-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;
+ return valid_new_sess;
}
}
+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)
{
}
static void
-acl_fa_ifc_init_sessions (acl_main_t * am, int sw_if_index0)
+acl_fa_verify_init_sessions (acl_main_t * am)
{
-#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
- vec_validate (am->fa_sessions_by_sw_if_index, sw_if_index0);
- BV (clib_bihash_init) (&am->fa_sessions_by_sw_if_index
- [sw_if_index0], "ACL plugin FA session bihash",
+ if (!am->fa_sessions_hash_is_initialized) {
+ u16 wk;
+ /* Allocate the per-worker sessions pools */
+ for (wk = 0; wk < vec_len (am->per_worker_data); wk++) {
+ acl_fa_per_worker_data_t *pw = &am->per_worker_data[wk];
+
+ /*
+ * // In lieu of trying to preallocate the pool and its free bitmap, rather use pool_init_fixed
+ * pool_alloc_aligned(pw->fa_sessions_pool, am->fa_conn_table_max_entries, CLIB_CACHE_LINE_BYTES);
+ * clib_bitmap_validate(pool_header(pw->fa_sessions_pool)->free_bitmap, am->fa_conn_table_max_entries);
+ */
+ pool_init_fixed(pw->fa_sessions_pool, am->fa_conn_table_max_entries);
+ }
+
+ /* ... and the interface session hash table */
+ 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_on_sw_if_index =
- clib_bitmap_set (am->fa_sessions_on_sw_if_index, sw_if_index0, 1);
+ 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 = pool_is_free_index (pw->fa_sessions_pool, session_index) ? 0 : pool_elt_at_index(pw->fa_sessions_pool, session_index);
+ return sess;
+}
+
+static inline int is_valid_session_ptr(acl_main_t *am, u16 thread_index, fa_session_t *sess)
+{
+ acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
+ return ((sess != 0) && ((sess - pw->fa_sessions_pool) < pool_len(pw->fa_sessions_pool)));
}
static void
-acl_fa_conn_list_add_session (acl_main_t * am, u32 sess_id, u64 now)
+acl_fa_conn_list_add_session (acl_main_t * am, fa_full_session_id_t sess_id, u64 now)
{
- fa_session_t *sess = am->fa_sessions_pool + sess_id;
+ 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 = am->fa_conn_list_tail[list_id];
- if (~0 != am->fa_conn_list_tail[list_id]) {
- fa_session_t *prev_sess = am->fa_sessions_pool + am->fa_conn_list_tail[list_id];
- prev_sess->link_next_idx = sess_id;
+ 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);
}
- am->fa_conn_list_tail[list_id] = sess_id;
-
- if (~0 == am->fa_conn_list_head[list_id]) {
- am->fa_conn_list_head[list_id] = sess_id;
- /* If it is a first conn in any list, kick off the cleaner */
- vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
- ACL_FA_CLEANER_RESCHEDULE, 0);
+ pw->fa_conn_list_tail[list_id] = sess_id.session_index;
+
+#ifdef FA_NODE_VERBOSE_DEBUG
+ clib_warning("FA-SESSION-DEBUG: add session id %d on thread %d sw_if_index %d", sess_id.session_index, thread_index, sess->sw_if_index);
+#endif
+ 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;
}
}
-static void
-acl_fa_conn_list_delete_session (acl_main_t *am, u32 sess_id)
+static int
+acl_fa_conn_list_delete_session (acl_main_t *am, fa_full_session_id_t sess_id)
{
- fa_session_t *sess = am->fa_sessions_pool + 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 = am->fa_sessions_pool + 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 (prev_sess->link_list_id != sess->link_list_id)
- clib_warning("(prev_sess->link_list_id != sess->link_list_id)");
}
if (~0 != sess->link_next_idx) {
- fa_session_t *next_sess = am->fa_sessions_pool + 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 (next_sess->link_list_id != sess->link_list_id)
- clib_warning("(next_sess->link_list_id != sess->link_list_id)");
}
- if (am->fa_conn_list_head[sess->link_list_id] == sess_id) {
- am->fa_conn_list_head[sess->link_list_id] = sess->link_next_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 (am->fa_conn_list_tail[sess->link_list_id] == sess_id) {
- am->fa_conn_list_tail[sess->link_list_id] = sess->link_prev_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;
}
-
-int
-acl_fa_session_is_dead (acl_main_t * am, u32 sw_if_index, u64 now,
- u32 sess_id)
-{
- return 0;
-}
-
-static void
-acl_fa_restart_timer_for_session (acl_main_t * am, u64 now, u32 sess_id)
+static int
+acl_fa_restart_timer_for_session (acl_main_t * am, u64 now, fa_full_session_id_t sess_id)
{
- // fa_session_t *sess = am->fa_sessions_pool + sess_id;
- acl_fa_conn_list_delete_session(am, sess_id);
- acl_fa_conn_list_add_session(am, sess_id, now);
+ 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 void
-acl_fa_delete_session (acl_main_t * am, u32 sw_if_index, u32 sess_id)
+acl_fa_delete_session (acl_main_t * am, u32 sw_if_index, fa_full_session_id_t sess_id)
{
- fa_session_t *sess = (fa_session_t *) am->fa_sessions_pool + sess_id;
- BV (clib_bihash_add_del) (&am->fa_sessions_by_sw_if_index[sw_if_index],
+ void *oldheap = clib_mem_set_heap(am->acl_mheap);
+ 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);
- pool_put_index (am->fa_sessions_pool, sess_id);
- /* Deleting from timer wheel not needed, as the cleaner deals 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]++;
+ 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 (pw->fa_session_dels_by_sw_if_index, sw_if_index);
+ clib_mem_set_heap (oldheap);
+ pw->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;
- vec_validate (am->fa_session_adds_by_sw_if_index, sw_if_index);
- vec_validate (am->fa_session_dels_by_sw_if_index, sw_if_index);
- curr_sess =
- am->fa_session_adds_by_sw_if_index[sw_if_index] -
- am->fa_session_dels_by_sw_if_index[sw_if_index];
- return (curr_sess < am->fa_conn_table_max_entries);
+ 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)
+{
+ fa_session_t *sess = get_session_ptr(am, thread_index, pw->fa_conn_list_head[timeout_type]);
+ /*
+ * We can not check just the index here because inbetween the worker thread might
+ * dequeue the connection from the head just as we are about to check it.
+ */
+ if (!is_valid_session_ptr(am, thread_index, sess)) {
+ return ~0LL; // infinity.
+ } else {
+ 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];
+ elog_acl_maybe_trace_X2(am, "acl_fa_check_idle_sessions: expire session %d on thread %d", "i4i4", (u32)fsid.session_index, (u32)thread_index);
+ 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, sw_if_index %d",
+ (int) fsid.session_index, sess->sw_if_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, sw_if_index %d",
+ (int) fsid.session_index, sess->sw_if_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, u32 sw_if_index)
+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;
- u32 sess_id = am->fa_conn_list_head[timeout_type];
- if (~0 != sess_id) {
+ 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
+static fa_session_t *
acl_fa_add_session (acl_main_t * am, int is_input, u32 sw_if_index, u64 now,
- fa_5tuple_t * p5tuple)
+ fa_5tuple_t * p5tuple, u16 current_policy_epoch)
{
clib_bihash_kv_40_8_t *pkv = &p5tuple->kv;
clib_bihash_kv_40_8_t kv;
- u32 sess_id;
- fa_session_t *sess;
+ fa_full_session_id_t f_sess_id;
+ uword thread_index = os_get_thread_index();
+ void *oldheap = clib_mem_set_heap(am->acl_mheap);
+ acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
- pool_get (am->fa_sessions_pool, sess);
- sess_id = sess - am->fa_sessions_pool;
+ 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;
+ f_sess_id.intf_policy_epoch = current_policy_epoch;
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 = sess_id;
+ 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->reserved1 = 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_by_sw_if_index[sw_if_index],
+ ASSERT(am->fa_sessions_hash_is_initialized == 1);
+ BV (clib_bihash_add_del) (&am->fa_sessions_hash,
&kv, 1);
- acl_fa_conn_list_add_session(am, sess_id, now);
+ 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]++;
+ vec_validate (pw->fa_session_adds_by_sw_if_index, sw_if_index);
+ clib_mem_set_heap (oldheap);
+ pw->fa_session_adds_by_sw_if_index[sw_if_index]++;
+ clib_smp_atomic_add(&am->fa_session_total_adds, 1);
+ return sess;
}
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_by_sw_if_index[sw_if_index0], &p5tuple->kv,
- pvalue_sess) == 0);
+ return (clib_bihash_search_40_8 (&am->fa_sessions_hash, &p5tuple->kv, pvalue_sess) == 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 ();
+ acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
u32 next0 = 0;
u8 action = 0;
u32 sw_if_index0;
+ u32 lc_index0;
int acl_check_needed = 1;
u32 match_acl_in_index = ~0;
+ u32 match_acl_pos = ~0;
u32 match_rule_index = ~0;
u8 error0 = 0;
+ u32 valid_new_sess;
/* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
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;
+ if (is_input)
+ lc_index0 = am->input_lc_index_by_sw_if_index[sw_if_index0];
+ else
+ lc_index0 = am->output_lc_index_by_sw_if_index[sw_if_index0];
+
+ u32 **p_epoch_vec = is_input ? &am->input_policy_epoch_by_sw_if_index
+ : &am->output_policy_epoch_by_sw_if_index;
+ u16 current_policy_epoch = sw_if_index0 < vec_len(*p_epoch_vec) ? vec_elt(*p_epoch_vec, sw_if_index0) : (is_input * FA_POLICY_EPOCH_IS_INPUT);
/*
* 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);
- acl_make_5tuple_session_key (is_input, &fa_5tuple, &kv_sess);
+ acl_plugin_fill_5tuple_inline (lc_index0, b0, is_ip6, is_input, is_l2_path, (fa_5tuple_opaque_t *)&fa_5tuple);
+ fa_5tuple.l4.lsb_of_sw_if_index = sw_if_index0 & 0xffff;
+ fa_5tuple.pkt.lc_index = lc_index0;
+ valid_new_sess = acl_make_5tuple_session_key (am, is_input, is_ip6, sw_if_index0, &fa_5tuple, &kv_sess);
+ fa_5tuple.pkt.is_ip6 = is_ip6;
+ // XXDEL 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",
+ ("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",
+ ("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
{
trace_bitmap |= 0x80000000;
error0 = ACL_FA_ERROR_ACL_EXIST_SESSION;
- // FIXME assert(value_sess.value == (0xffffffff & value_sess.value));
- u32 sess_id = value_sess.value;
- fa_session_t *sess = am->fa_sessions_pool + sess_id;
+ 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 = sess_id;
+ match_rule_index = f_sess_id.session_index;
int new_timeout_type =
fa_session_get_timeout_type (am, sess);
acl_check_needed = 0;
/* 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, sess_id);
+ 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 (PREDICT_FALSE(am->reclassify_sessions)) {
+ /* if the MSB of policy epoch matches but not the LSB means it is a stale session */
+ if ( (0 == ((current_policy_epoch ^ f_sess_id.intf_policy_epoch) & FA_POLICY_EPOCH_IS_INPUT))
+ && (current_policy_epoch != f_sess_id.intf_policy_epoch) ) {
+ /* delete session and increment the counter */
+ vec_validate (pw->fa_session_epoch_change_by_sw_if_index, sw_if_index0);
+ vec_elt (pw->fa_session_epoch_change_by_sw_if_index, sw_if_index0)++;
+ if(acl_fa_conn_list_delete_session(am, f_sess_id)) {
+ /* delete the session only if we were able to unlink it */
+ acl_fa_delete_session (am, sw_if_index0, f_sess_id);
+ }
+ acl_check_needed = 1;
+ trace_bitmap |= 0x40000000;
+ }
+ }
}
}
if (acl_check_needed)
{
- action =
- full_acl_match_5tuple (sw_if_index0, &fa_5tuple, is_l2_path,
- is_ip6, is_input, &match_acl_in_index,
+ action = 0; /* deny by default */
+ acl_plugin_match_5tuple_inline (lc_index0, (fa_5tuple_opaque_t *)&fa_5tuple,
+ is_ip6, &action, &match_acl_pos, &match_acl_in_index,
&match_rule_index, &trace_bitmap);
error0 = action;
if (1 == action)
if (2 == action)
{
if (!acl_fa_can_add_session (am, is_input, sw_if_index0))
- acl_fa_try_recycle_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;
+ if (PREDICT_TRUE (valid_new_sess)) {
+ fa_session_t *sess = acl_fa_add_session (am, is_input,
+ sw_if_index0,
+ now, &kv_sess, current_policy_epoch);
+ acl_fa_track_session (am, is_input, sw_if_index0, now,
+ sess, &fa_5tuple);
+ pkts_new_session += 1;
+ } else {
+ /*
+ * ICMP packets with non-icmp_valid_new type will be
+ * forwared without being dropped.
+ */
+ action = 1;
+ pkts_acl_permit += 1;
+ }
}
else
{
if (action > 0)
{
if (is_l2_path)
- next0 =
- feat_bitmap_get_next_node_index (l2_feat_next_node_index,
- feature_bitmap0);
+ next0 = vnet_l2_feature_next (b0, l2_feat_next_node_index, 0);
else
vnet_feature_next (sw_if_index0, &next0, b0);
}
+#ifdef FA_NODE_VERBOSE_DEBUG
+ clib_warning("ACL_FA_NODE_DBG: sw_if_index %d lc_index %d action %d acl_index %d rule_index %d", sw_if_index0, lc_index0, action, match_acl_in_index, match_rule_index);
+#endif
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->lc_index = lc_index0;
t->next_index = next0;
t->match_acl_in_index = match_acl_in_index;
t->match_rule_index = match_rule_index;
}
/*
- * This process performs all the connection clean up - both for idle connections,
- * as well as receiving the signals to clean up the connections in case of sw_if_index deletion,
- * or (maybe in the future) the connection deletion due to policy reasons.
- *
- * The previous iteration (l2sess) attempted to clean up the connections in small increments,
- * in-band, but the problem it tried to preemptively address (process starvation) is yet to be seen.
- *
- * The approach with a single thread deleting the connections is simpler, thus we use it until
- * there is a real starvation problem to solve.
- *
+ * 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.
*/
#undef _
};
-static int
-acl_fa_clean_sessions_by_sw_if_index (acl_main_t *am, u32 sw_if_index, u32 *count)
-{
-
- int undeleted = 0;
- fa_session_t *sess;
- uword *dv = NULL;
- uword *ii;
-
- pool_foreach(sess, am->fa_sessions_pool, ({
- if ( (~0 == sw_if_index) || (sw_if_index == sess->sw_if_index) )
- vec_add1(dv, sess-am->fa_sessions_pool);
- }));
- vec_foreach(ii, dv)
- {
- sess = pool_elt_at_index(am->fa_sessions_pool, *ii);
- acl_fa_delete_session(am, sess->sw_if_index, *ii);
- (*count)++;
- }
-
- pool_foreach(sess, am->fa_sessions_pool, ({
- if ( (~0 == sw_if_index) || (sw_if_index == sess->sw_if_index) )
- undeleted++;
- }));
- if (undeleted == 0)
- {
- if (~0 == sw_if_index)
- {
- /* FIXME: clean-up tables ? */
- }
- else
- {
- /* FIXME: clean-up tables ? */
- }
- }
- return (undeleted == 0);
-}
/* *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;
-static int
-acl_fa_conn_time_to_check (acl_main_t *am, u64 now, u32 session_index)
+/*
+ * 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)
{
- fa_session_t *sess = am->fa_sessions_pool + session_index;
- u64 timeout_time =
- sess->link_enqueue_time + fa_session_get_timeout (am, sess);
- return (timeout_time < now);
+ 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;
+ elog_acl_maybe_trace_X1(am, "acl_fa_worker_conn_cleaner interrupt: now %lu", "i8", now);
+ /* 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)) {
+ elog_acl_maybe_trace_X1(am, "acl_fa_worker_conn_cleaner: now %lu, someone tried to call clear but one of the bitmaps are empty", "i8", now);
+ 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. */
+ elog_acl_maybe_trace_X1(am, "acl_fa_worker_conn_cleaner: now %lu, clearing done, nothing to do", "i8", now);
+ 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
+ elog_acl_maybe_trace_X1(am, "acl_fa_worker_conn_cleaner: swiping until %lu", "i8", now);
+ /* 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);
+ elog_acl_maybe_trace_X2(am, "acl_fa_worker_conn_cleaner: checked %d sessions (clear_in_process: %d)", "i4i4", (u32)num_expired, (u32)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;
+ elog_acl_maybe_trace_X1(am, "acl_fa_worker_conn_cleaner: now %lu, clearing done - all done", "i8", now);
+ } else {
+ elog_acl_maybe_trace_X1(am, "acl_fa_worker_conn_cleaner: now %lu, more work to do - requesting interrupt", "i8", now);
+ /* 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;
+ pw->interrupt_is_unwanted = 0;
+ } else if (num_expired <= am->fa_min_deleted_sessions_per_interval) {
+ /* signal that they should trigger us less */
+ pw->interrupt_is_needed = 0;
+ pw->interrupt_is_unwanted = 1;
+ } else {
+ /* the current rate of interrupts is ok */
+ pw->interrupt_is_needed = 0;
+ pw->interrupt_is_unwanted = 0;
+ }
+ elog_acl_maybe_trace_X3(am, "acl_fa_worker_conn_cleaner: now %lu, interrupt needed: %u, interrupt unwanted: %u", "i8i4i4", now, ((u32)pw->interrupt_is_needed), ((u32)pw->interrupt_is_unwanted));
+ }
+ pw->interrupt_generation = am->fa_interrupt_generation;
+ 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) {
+ pw->interrupt_is_pending = 1;
+ vlib_node_set_interrupt_pending (vlib_mains[thread_index],
+ acl_fa_worker_session_cleaner_process_node.index);
+ elog_acl_maybe_trace_X1(am, "send_one_worker_interrupt: send interrupt to worker %d", "i4", ((u32)thread_index));
+ /* 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 = 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 ();
+ u64 now;
f64 cpu_cps = vm->clib_time.clocks_per_second;
u64 next_expire;
- /* We should call timer wheel at least twice a second */
+ /* We should check if there are connections to clean up - at least twice a second */
u64 max_timer_wait_interval = cpu_cps / 2;
- am->fa_current_cleaner_timer_wait_interval = max_timer_wait_interval;
-
- u32 *expired = NULL;
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;
-
+ am->fa_interrupt_generation = 1;
while (1)
{
- u32 count_deleted_sessions = 0;
- u32 count_already_deleted = 0;
now = clib_cpu_time_now ();
next_expire = now + am->fa_current_cleaner_timer_wait_interval;
int has_pending_conns = 0;
+ u16 ti;
u8 tt;
- for(tt = 0; tt < ACL_N_TIMEOUTS; tt++)
- {
- if (~0 != am->fa_conn_list_head[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) {
+ elog_acl_maybe_trace_X3(am, "acl_fa_session_cleaner_process: now %lu, worker: %d tt: %d", "i8i2i2", now, ti, tt);
+ elog_acl_maybe_trace_X2(am, "acl_fa_session_cleaner_process: head expiry: %lu, is earlier than curr next expire: %lu", "i8i8", head_expiry, next_expire);
+ 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)
+ /* If no pending connections and no ACL applied then no point in timing out */
+ if (!has_pending_conns && (0 == am->fa_total_enabled_count))
{
am->fa_cleaner_cnt_wait_without_timeout++;
+ elog_acl_maybe_trace_X1(am, "acl_conn_cleaner: now %lu entering wait without timeout", "i8", now);
(void) vlib_process_wait_for_event (vm);
event_type = vlib_process_get_events (vm, &event_data);
}
}
else
{
- /* Timing wheel code is happier if it is called regularly */
- if (timeout > 0.5)
- timeout = 0.5;
am->fa_cleaner_cnt_wait_with_timeout++;
+ elog_acl_maybe_trace_X2(am, "acl_conn_cleaner: now %lu entering wait with timeout %.6f sec", "i8f8", now, 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:
break;
case ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX:
{
+ uword *clear_sw_if_index_bitmap = 0;
uword *sw_if_index0;
+ int clear_all = 0;
+ now = clib_cpu_time_now ();
+ elog_acl_maybe_trace_X1(am, "acl_fa_session_cleaner_process: now %lu, received ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX", "i8", now);
vec_foreach (sw_if_index0, event_data)
{
am->fa_cleaner_cnt_delete_by_sw_index++;
+ elog_acl_maybe_trace_X1(am, "acl_fa_session_cleaner_process: ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX %d", "i4", *sw_if_index0);
+ if (*sw_if_index0 == ~0)
+ {
+ clear_all = 1;
+ }
+ else
+ {
+ if (!pool_is_free_index (am->vnet_main->interface_main.sw_interfaces, *sw_if_index0))
+ {
+ 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_NODE_CLEAN: ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX: %d",
- *sw_if_index0);
+ clib_warning("ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX bitmap: %U", format_bitmap_hex, clear_sw_if_index_bitmap);
#endif
- u32 count = 0;
- int result =
- acl_fa_clean_sessions_by_sw_if_index (am, *sw_if_index0,
- &count);
- count_deleted_sessions += count;
- am->fa_cleaner_cnt_delete_by_sw_index_ok += result;
- }
+ vec_foreach(pw0, am->per_worker_data) {
+ CLIB_MEMORY_BARRIER ();
+ while (pw0->clear_in_process) {
+ CLIB_MEMORY_BARRIER ();
+ elog_acl_maybe_trace_X1(am, "ACL_FA_NODE_CLEAN: waiting previous cleaning cycle to finish on %d", "i4", (u32)(pw0 - am->per_worker_data));
+ 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 {
+ if (clear_all)
+ {
+ /* if we need to clear all, then just clear the interfaces that we are servicing */
+ pw0->pending_clear_sw_if_index_bitmap = clib_bitmap_dup(pw0->serviced_sw_if_index_bitmap);
+ }
+ 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 ();
+ elog_acl_maybe_trace_X1(am, "ACL_FA_NODE_CLEAN: waiting for my cleaning cycle to finish on %d", "i4", (u32)(pw0 - am->per_worker_data));
+ 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:
break;
}
- {
- u8 tt = 0;
- for(tt = 0; tt < ACL_N_TIMEOUTS; tt++) {
- while((vec_len(expired) < 2*am->fa_max_deleted_sessions_per_interval)
- && (~0 != am->fa_conn_list_head[tt])
- && (acl_fa_conn_time_to_check(am, now,
- am->fa_conn_list_head[tt]))) {
- u32 sess_id = am->fa_conn_list_head[tt];
- vec_add1(expired, sess_id);
- acl_fa_conn_list_delete_session(am, sess_id);
- }
- }
- }
+ send_interrupts_to_workers(vm, am);
- u32 *psid = NULL;
- vec_foreach (psid, expired)
- {
- u32 session_index = *psid;
- if (!pool_is_free_index (am->fa_sessions_pool, session_index))
- {
- fa_session_t *sess = am->fa_sessions_pool + 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)
- {
- /* clib_warning ("ACL_FA_NODE_CLEAN: Restarting timer for session %d",
- (int) session_index); */
-
- /* 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, session_index, now);
-
- /* FIXME: When/if moving to timer wheel,
- pretend we did this in the past,
- at last_active moment, so the timer is accurate */
- am->fa_cleaner_cnt_timer_restarted++;
- }
- else
- {
- /* clib_warning ("ACL_FA_NODE_CLEAN: Deleting session %d",
- (int) session_index); */
- acl_fa_delete_session (am, sw_if_index, session_index);
- count_deleted_sessions++;
- }
- }
- else
- {
- count_already_deleted++;
- }
- }
- if (expired)
- _vec_len (expired) = 0;
if (event_data)
_vec_len (event_data) = 0;
- if (count_deleted_sessions > am->fa_max_deleted_sessions_per_interval) {
- /* if there was too many sessions to delete, do less waiting around next time */
+ /*
+ * If the interrupts were not processed yet, ensure we wait a bit,
+ * but up to a point.
+ */
+ int need_more_wait = 0;
+ int max_wait_cycles = 100;
+ do {
+ need_more_wait = 0;
+ vec_foreach(pw0, am->per_worker_data) {
+ if (pw0->interrupt_generation != am->fa_interrupt_generation) {
+ need_more_wait = 1;
+ }
+ }
+ if (need_more_wait) {
+ vlib_process_suspend(vm, 0.0001);
+ }
+ } while (need_more_wait && (--max_wait_cycles > 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 (count_deleted_sessions < am->fa_min_deleted_sessions_per_interval) {
- /* Too few deleted sessions, slowly increase the amount of sleep up to a limit */
+ /* never go into zero-wait either though - we need to give the space to others */
+ am->fa_current_cleaner_timer_wait_interval += 1;
+ } 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++;
- am->fa_cleaner_cnt_deleted_sessions += count_deleted_sessions;
- am->fa_cleaner_cnt_already_deleted += count_already_deleted;
+ am->fa_interrupt_generation++;
}
/* NOT REACHED */
return 0;
acl_fa_enable_disable (u32 sw_if_index, int is_input, int enable_disable)
{
acl_main_t *am = &acl_main;
+ if (enable_disable) {
+ acl_fa_verify_init_sessions(am);
+ am->fa_total_enabled_count++;
+ void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
+ vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
+ ACL_FA_CLEANER_RESCHEDULE, 0);
+ clib_mem_set_heap (oldheap);
+ } else {
+ am->fa_total_enabled_count--;
+ }
+
if (is_input)
{
+ ASSERT(clib_bitmap_get(am->fa_in_acl_on_sw_if_index, sw_if_index) != enable_disable);
+ void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
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);
+ clib_mem_set_heap (oldheap);
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
{
+ ASSERT(clib_bitmap_get(am->fa_out_acl_on_sw_if_index, sw_if_index) != enable_disable);
+ void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
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);
+ clib_mem_set_heap (oldheap);
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
+ void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX,
sw_if_index);
+ clib_mem_set_heap (oldheap);
}
}
+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,
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