#define IP6_REASS_TIMEOUT_DEFAULT_MS 100
#define IP6_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 10000 // 10 seconds default
#define IP6_REASS_MAX_REASSEMBLIES_DEFAULT 1024
+#define IP6_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT 3
#define IP6_REASS_HT_LOAD_FACTOR (0.75)
typedef enum
{
IP6_REASS_RC_OK,
IP6_REASS_RC_INTERNAL_ERROR,
+ IP6_REASS_RC_TOO_MANY_FRAGMENTS,
IP6_REASS_RC_NO_BUF,
} ip6_reass_rc_t;
};
} ip6_reass_key_t;
+typedef union
+{
+ struct
+ {
+ u32 reass_index;
+ u32 thread_index;
+ };
+ u64 as_u64;
+} ip6_reass_val_t;
+
+typedef union
+{
+ struct
+ {
+ ip6_reass_key_t k;
+ ip6_reass_val_t v;
+ };
+ clib_bihash_kv_48_8_t kv;
+} ip6_reass_kv_t;
+
+
always_inline u32
ip6_reass_buffer_get_data_offset (vlib_buffer_t * b)
{
u8 next_index;
// minimum fragment length for this reassembly - used to estimate MTU
u16 min_fragment_length;
+ // number of fragments for this reassembly
+ u32 fragments_n;
} ip6_reass_t;
typedef struct
u32 timeout_ms;
f64 timeout;
u32 expire_walk_interval_ms;
+ // maximum number of fragments in one reassembly
+ u32 max_reass_len;
+ // maximum number of reassemblies
u32 max_reass_n;
// IPv6 runtime
u32 ip6_icmp_error_idx;
u32 ip6_reass_expire_node_idx;
+ /** Worker handoff */
+ u32 fq_index;
+ u32 fq_feature_index;
+
} ip6_reass_main_t;
+extern ip6_reass_main_t ip6_reass_main;
+
+#ifndef CLIB_MARCH_VARIANT
ip6_reass_main_t ip6_reass_main;
+#endif /* CLIB_MARCH_VARIANT */
typedef enum
{
IP6_REASSEMBLY_NEXT_INPUT,
IP6_REASSEMBLY_NEXT_DROP,
IP6_REASSEMBLY_NEXT_ICMP_ERROR,
+ IP6_REASSEMBLY_NEXT_HANDOFF,
IP6_REASSEMBLY_N_NEXT,
} ip6_reass_next_t;
always_inline ip6_reass_t *
ip6_reass_find_or_create (vlib_main_t * vm, vlib_node_runtime_t * node,
ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt,
- ip6_reass_key_t * k, u32 * icmp_bi)
+ ip6_reass_kv_t * kv, u32 * icmp_bi, u8 * do_handoff)
{
ip6_reass_t *reass = NULL;
f64 now = vlib_time_now (rm->vlib_main);
- clib_bihash_kv_48_8_t kv, value;
- kv.key[0] = k->as_u64[0];
- kv.key[1] = k->as_u64[1];
- kv.key[2] = k->as_u64[2];
- kv.key[3] = k->as_u64[3];
- kv.key[4] = k->as_u64[4];
- kv.key[5] = k->as_u64[5];
-
- if (!clib_bihash_search_48_8 (&rm->hash, &kv, &value))
+
+ if (!clib_bihash_search_48_8
+ (&rm->hash, (clib_bihash_kv_48_8_t *) kv, (clib_bihash_kv_48_8_t *) kv))
{
- reass = pool_elt_at_index (rt->pool, value.value);
+ if (vm->thread_index != kv->v.thread_index)
+ {
+ *do_handoff = 1;
+ return NULL;
+ }
+ reass = pool_elt_at_index (rt->pool, kv->v.reass_index);
+
if (now > reass->last_heard + rm->timeout)
{
ip6_reass_on_timeout (vm, node, rm, reass, icmp_bi);
{
pool_get (rt->pool, reass);
clib_memset (reass, 0, sizeof (*reass));
- reass->id =
- ((u64) os_get_thread_index () * 1000000000) + rt->id_counter;
+ reass->id = ((u64) vm->thread_index * 1000000000) + rt->id_counter;
++rt->id_counter;
reass->first_bi = ~0;
reass->last_packet_octet = ~0;
++rt->reass_n;
}
- reass->key.as_u64[0] = kv.key[0] = k->as_u64[0];
- reass->key.as_u64[1] = kv.key[1] = k->as_u64[1];
- reass->key.as_u64[2] = kv.key[2] = k->as_u64[2];
- reass->key.as_u64[3] = kv.key[3] = k->as_u64[3];
- reass->key.as_u64[4] = kv.key[4] = k->as_u64[4];
- reass->key.as_u64[5] = kv.key[5] = k->as_u64[5];
- kv.value = reass - rt->pool;
+ reass->key.as_u64[0] = ((clib_bihash_kv_48_8_t *) kv)->key[0];
+ reass->key.as_u64[1] = ((clib_bihash_kv_48_8_t *) kv)->key[1];
+ reass->key.as_u64[2] = ((clib_bihash_kv_48_8_t *) kv)->key[2];
+ reass->key.as_u64[3] = ((clib_bihash_kv_48_8_t *) kv)->key[3];
+ reass->key.as_u64[4] = ((clib_bihash_kv_48_8_t *) kv)->key[4];
+ reass->key.as_u64[5] = ((clib_bihash_kv_48_8_t *) kv)->key[5];
+ kv->v.reass_index = (reass - rt->pool);
+ kv->v.thread_index = vm->thread_index;
reass->last_heard = now;
- if (clib_bihash_add_del_48_8 (&rm->hash, &kv, 1))
+ if (clib_bihash_add_del_48_8 (&rm->hash, (clib_bihash_kv_48_8_t *) kv, 1))
{
ip6_reass_free (rm, rt, reass);
reass = NULL;
*bi0);
reass->min_fragment_length = clib_net_to_host_u16 (fip->payload_length);
consumed = 1;
+ reass->fragments_n = 1;
goto check_if_done_maybe;
}
reass->min_fragment_length =
}
break;
}
+ ++reass->fragments_n;
check_if_done_maybe:
if (consumed)
{
if (consumed)
{
*bi0 = ~0;
+ if (reass->fragments_n > rm->max_reass_len)
+ {
+ return IP6_REASS_RC_TOO_MANY_FRAGMENTS;
+ }
}
else
{
u32 *from = vlib_frame_vector_args (frame);
u32 n_left_from, n_left_to_next, *to_next, next_index;
ip6_reass_main_t *rm = &ip6_reass_main;
- ip6_reass_per_thread_t *rt = &rm->per_thread_data[os_get_thread_index ()];
+ ip6_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index];
clib_spinlock_lock (&rt->lock);
n_left_from = frame->n_vectors;
vnet_buffer (b0)->ip.reass.ip6_frag_hdr_offset =
(u8 *) frag_hdr - (u8 *) ip0;
- ip6_reass_key_t k;
- k.as_u64[0] = ip0->src_address.as_u64[0];
- k.as_u64[1] = ip0->src_address.as_u64[1];
- k.as_u64[2] = ip0->dst_address.as_u64[0];
- k.as_u64[3] = ip0->dst_address.as_u64[1];
- k.as_u64[4] =
- (u64) vnet_buffer (b0)->
- sw_if_index[VLIB_RX] << 32 | frag_hdr->identification;
- k.as_u64[5] = ip0->protocol;
+ ip6_reass_kv_t kv;
+ u8 do_handoff = 0;
+
+ kv.k.as_u64[0] = ip0->src_address.as_u64[0];
+ kv.k.as_u64[1] = ip0->src_address.as_u64[1];
+ kv.k.as_u64[2] = ip0->dst_address.as_u64[0];
+ kv.k.as_u64[3] = ip0->dst_address.as_u64[1];
+ kv.k.as_u64[4] =
+ ((u64) vec_elt (ip6_main.fib_index_by_sw_if_index,
+ vnet_buffer (b0)->sw_if_index[VLIB_RX])) << 32 |
+ (u64) frag_hdr->identification;
+ kv.k.as_u64[5] = ip0->protocol;
+
ip6_reass_t *reass =
- ip6_reass_find_or_create (vm, node, rm, rt, &k, &icmp_bi);
+ ip6_reass_find_or_create (vm, node, rm, rt, &kv, &icmp_bi,
+ &do_handoff);
- if (reass)
+ if (PREDICT_FALSE (do_handoff))
+ {
+ next0 = IP6_REASSEMBLY_NEXT_HANDOFF;
+ if (is_feature)
+ vnet_buffer (b0)->ip.reass.owner_feature_thread_index =
+ kv.v.thread_index;
+ else
+ vnet_buffer (b0)->ip.reass.owner_thread_index =
+ kv.v.thread_index;
+ }
+ else if (reass)
{
switch (ip6_reass_update (vm, node, rm, rt, reass, &bi0, &next0,
&error0, frag_hdr, is_feature))
case IP6_REASS_RC_OK:
/* nothing to do here */
break;
+ case IP6_REASS_RC_TOO_MANY_FRAGMENTS:
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG,
+ 1);
+ ip6_reass_drop_all (vm, rm, reass);
+ ip6_reass_free (rm, rt, reass);
+ goto next_packet;
+ break;
case IP6_REASS_RC_NO_BUF:
- /* fallthrough */
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_NO_BUF, 1);
+ ip6_reass_drop_all (vm, rm, reass);
+ ip6_reass_free (rm, rt, reass);
+ goto next_packet;
+ break;
case IP6_REASS_RC_INTERNAL_ERROR:
- /* drop everything and start with a clean slate */
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_INTERNAL_ERROR,
+ 1);
ip6_reass_drop_all (vm, rm, reass);
ip6_reass_free (rm, rt, reass);
goto next_packet;
#undef _
};
-static uword
-ip6_reassembly (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+VLIB_NODE_FN (ip6_reass_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
return ip6_reassembly_inline (vm, node, frame, false /* is_feature */ );
}
/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (ip6_reass_node, static) = {
- .function = ip6_reassembly,
+VLIB_REGISTER_NODE (ip6_reass_node) = {
.name = "ip6-reassembly",
.vector_size = sizeof (u32),
.format_trace = format_ip6_reass_trace,
[IP6_REASSEMBLY_NEXT_INPUT] = "ip6-input",
[IP6_REASSEMBLY_NEXT_DROP] = "ip6-drop",
[IP6_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
+ [IP6_REASSEMBLY_NEXT_HANDOFF] = "ip6-reassembly-handoff",
},
};
/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (ip6_reass_node, ip6_reassembly);
-
-static uword
-ip6_reassembly_feature (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
+VLIB_NODE_FN (ip6_reass_node_feature) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
return ip6_reassembly_inline (vm, node, frame, true /* is_feature */ );
}
/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (ip6_reass_node_feature, static) = {
- .function = ip6_reassembly_feature,
+VLIB_REGISTER_NODE (ip6_reass_node_feature) = {
.name = "ip6-reassembly-feature",
.vector_size = sizeof (u32),
.format_trace = format_ip6_reass_trace,
[IP6_REASSEMBLY_NEXT_INPUT] = "ip6-input",
[IP6_REASSEMBLY_NEXT_DROP] = "ip6-drop",
[IP6_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
+ [IP6_REASSEMBLY_NEXT_HANDOFF] = "ip6-reass-feature-hoff",
},
};
/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (ip6_reass_node_feature, ip6_reassembly_feature);
-
/* *INDENT-OFF* */
VNET_FEATURE_INIT (ip6_reassembly_feature, static) = {
.arc_name = "ip6-unicast",
};
/* *INDENT-ON* */
+#ifndef CLIB_MARCH_VARIANT
static u32
ip6_reass_get_nbuckets ()
{
return nbuckets;
}
+#endif /* CLIB_MARCH_VARIANT */
typedef enum
{
IP6_EVENT_CONFIG_CHANGED = 1,
} ip6_reass_event_t;
+#ifndef CLIB_MARCH_VARIANT
typedef struct
{
int failure;
static void
ip6_reass_set_params (u32 timeout_ms, u32 max_reassemblies,
- u32 expire_walk_interval_ms)
+ u32 max_reassembly_length, u32 expire_walk_interval_ms)
{
ip6_reass_main.timeout_ms = timeout_ms;
ip6_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC;
ip6_reass_main.max_reass_n = max_reassemblies;
+ ip6_reass_main.max_reass_len = max_reassembly_length;
ip6_reass_main.expire_walk_interval_ms = expire_walk_interval_ms;
}
vnet_api_error_t
ip6_reass_set (u32 timeout_ms, u32 max_reassemblies,
- u32 expire_walk_interval_ms)
+ u32 max_reassembly_length, u32 expire_walk_interval_ms)
{
u32 old_nbuckets = ip6_reass_get_nbuckets ();
- ip6_reass_set_params (timeout_ms, max_reassemblies,
+ ip6_reass_set_params (timeout_ms, max_reassemblies, max_reassembly_length,
expire_walk_interval_ms);
vlib_process_signal_event (ip6_reass_main.vlib_main,
ip6_reass_main.ip6_reass_expire_node_idx,
ip6_reass_set_params (IP6_REASS_TIMEOUT_DEFAULT_MS,
IP6_REASS_MAX_REASSEMBLIES_DEFAULT,
+ IP6_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT,
IP6_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS);
nbuckets = ip6_reass_get_nbuckets ();
ip6_register_protocol (IP_PROTOCOL_IPV6_FRAGMENTATION,
ip6_reass_node.index);
+ rm->fq_index = vlib_frame_queue_main_init (ip6_reass_node.index, 0);
+ rm->fq_feature_index =
+ vlib_frame_queue_main_init (ip6_reass_node_feature.index, 0);
+
return error;
}
VLIB_INIT_FUNCTION (ip6_reass_init_function);
+#endif /* CLIB_MARCH_VARIANT */
static uword
ip6_reass_walk_expired (vlib_main_t * vm,
return 0;
}
-static vlib_node_registration_t ip6_reass_expire_node;
-
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_reass_expire_node, static) = {
.function = ip6_reass_walk_expired,
};
/* *INDENT-ON* */
+#ifndef CLIB_MARCH_VARIANT
vnet_api_error_t
ip6_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
{
return vnet_feature_enable_disable ("ip6-unicast", "ip6-reassembly-feature",
sw_if_index, enable_disable, 0, 0);
}
+#endif /* CLIB_MARCH_VARIANT */
+
+#define foreach_ip6_reassembly_handoff_error \
+_(CONGESTION_DROP, "congestion drop")
+
+
+typedef enum
+{
+#define _(sym,str) IP6_REASSEMBLY_HANDOFF_ERROR_##sym,
+ foreach_ip6_reassembly_handoff_error
+#undef _
+ IP6_REASSEMBLY_HANDOFF_N_ERROR,
+} ip6_reassembly_handoff_error_t;
+
+static char *ip6_reassembly_handoff_error_strings[] = {
+#define _(sym,string) string,
+ foreach_ip6_reassembly_handoff_error
+#undef _
+};
+
+typedef struct
+{
+ u32 next_worker_index;
+} ip6_reassembly_handoff_trace_t;
+
+static u8 *
+format_ip6_reassembly_handoff_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 *);
+ ip6_reassembly_handoff_trace_t *t =
+ va_arg (*args, ip6_reassembly_handoff_trace_t *);
+
+ s =
+ format (s, "ip6-reassembly-handoff: next-worker %d",
+ t->next_worker_index);
+
+ return s;
+}
+
+always_inline uword
+ip6_reassembly_handoff_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame, bool is_feature)
+{
+ ip6_reass_main_t *rm = &ip6_reass_main;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+ u32 n_enq, n_left_from, *from;
+ u16 thread_indices[VLIB_FRAME_SIZE], *ti;
+ u32 fq_index;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+
+ b = bufs;
+ ti = thread_indices;
+
+ fq_index = (is_feature) ? rm->fq_feature_index : rm->fq_index;
+
+ while (n_left_from > 0)
+ {
+ ti[0] =
+ (is_feature) ? vnet_buffer (b[0])->ip.
+ reass.owner_feature_thread_index : vnet_buffer (b[0])->ip.
+ reass.owner_thread_index;
+
+ if (PREDICT_FALSE
+ ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ ip6_reassembly_handoff_trace_t *t =
+ vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->next_worker_index = ti[0];
+ }
+
+ n_left_from -= 1;
+ ti += 1;
+ b += 1;
+ }
+ n_enq =
+ vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
+ frame->n_vectors, 1);
+
+ if (n_enq < frame->n_vectors)
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_REASSEMBLY_HANDOFF_ERROR_CONGESTION_DROP,
+ frame->n_vectors - n_enq);
+ return frame->n_vectors;
+}
+
+VLIB_NODE_FN (ip6_reassembly_handoff_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip6_reassembly_handoff_inline (vm, node, frame,
+ false /* is_feature */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_reassembly_handoff_node) = {
+ .name = "ip6-reassembly-handoff",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(ip6_reassembly_handoff_error_strings),
+ .error_strings = ip6_reassembly_handoff_error_strings,
+ .format_trace = format_ip6_reassembly_handoff_trace,
+
+ .n_next_nodes = 1,
+
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+
+
+VLIB_NODE_FN (ip6_reassembly_feature_handoff_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return ip6_reassembly_handoff_inline (vm, node, frame, true /* is_feature */ );
+}
+
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_reassembly_feature_handoff_node) = {
+ .name = "ip6-reass-feature-hoff",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(ip6_reassembly_handoff_error_strings),
+ .error_strings = ip6_reassembly_handoff_error_strings,
+ .format_trace = format_ip6_reassembly_handoff_trace,
+
+ .n_next_nodes = 1,
+
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
Code Review / vpp.git / blobdiff