diff options
Diffstat (limited to 'src/vnet/ip/ip6_reassembly.c')
| -rw-r--r-- | src/vnet/ip/ip6_reassembly.c | 172 |
1 files changed, 133 insertions, 39 deletions
diff --git a/src/vnet/ip/ip6_reassembly.c b/src/vnet/ip/ip6_reassembly.c index 20bb7720526..a65697b15b2 100644 --- a/src/vnet/ip/ip6_reassembly.c +++ b/src/vnet/ip/ip6_reassembly.c @@ -39,6 +39,7 @@ typedef enum IP6_REASS_RC_INTERNAL_ERROR, IP6_REASS_RC_TOO_MANY_FRAGMENTS, IP6_REASS_RC_NO_BUF, + IP6_REASS_RC_HANDOFF, } ip6_reass_rc_t; typedef struct @@ -63,7 +64,7 @@ typedef union struct { u32 reass_index; - u32 thread_index; + u32 memory_owner_thread_index; }; u64 as_u64; } ip6_reass_val_t; @@ -118,6 +119,11 @@ typedef struct u16 min_fragment_length; // number of fragments for this reassembly u32 fragments_n; + // thread owning memory for this context (whose pool contains this ctx) + u32 memory_owner_thread_index; + // thread which received fragment with offset 0 and which sends out the + // completed reassembly + u32 sendout_thread_index; } ip6_reass_t; typedef struct @@ -147,7 +153,6 @@ typedef struct // convenience vlib_main_t *vlib_main; - vnet_main_t *vnet_main; // node index of ip6-drop node u32 ip6_drop_idx; @@ -183,6 +188,7 @@ typedef enum ICMP_ERROR_FL_TOO_BIG, ICMP_ERROR_FL_NOT_MULT_8, FINALIZE, + HANDOFF, } ip6_reass_trace_operation_e; typedef struct @@ -200,11 +206,12 @@ typedef struct ip6_reass_trace_operation_e action; u32 reass_id; ip6_reass_range_trace_t trace_range; - u32 size_diff; u32 op_id; u32 fragment_first; u32 fragment_last; u32 total_data_len; + u32 thread_id; + u32 thread_id_to; } ip6_reass_trace_t; static void @@ -236,11 +243,15 @@ format_ip6_reass_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_reass_trace_t *t = va_arg (*args, ip6_reass_trace_t *); - s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id); - u32 indent = format_get_indent (s); - s = format (s, "first bi: %u, data len: %u, ip/fragment[%u, %u]", - t->trace_range.first_bi, t->total_data_len, t->fragment_first, - t->fragment_last); + u32 indent = 0; + if (~0 != t->reass_id) + { + s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id); + indent = format_get_indent (s); + s = format (s, "first bi: %u, data len: %u, ip/fragment[%u, %u]", + t->trace_range.first_bi, t->total_data_len, + t->fragment_first, t->fragment_last); + } switch (t->action) { case RANGE_NEW: @@ -268,29 +279,34 @@ format_ip6_reass_trace (u8 * s, va_list * args) case FINALIZE: s = format (s, "\n%Ufinalize reassembly", format_white_space, indent); break; + case HANDOFF: + s = + format (s, "handoff from thread #%u to thread #%u", t->thread_id, + t->thread_id_to); + break; } return s; } static void ip6_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node, - ip6_reass_main_t * rm, ip6_reass_t * reass, - u32 bi, ip6_reass_trace_operation_e action, - u32 size_diff) + ip6_reass_main_t * rm, u32 reass_id, u32 op_id, + u32 bi, u32 first_bi, u32 data_len, + ip6_reass_trace_operation_e action, u32 thread_id_to) { vlib_buffer_t *b = vlib_get_buffer (vm, bi); vnet_buffer_opaque_t *vnb = vnet_buffer (b); ip6_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0])); - t->reass_id = reass->id; + t->reass_id = reass_id; t->action = action; ip6_reass_trace_details (vm, bi, &t->trace_range); - t->size_diff = size_diff; - t->op_id = reass->trace_op_counter; - ++reass->trace_op_counter; + t->op_id = op_id; + t->thread_id = vm->thread_index; + t->thread_id_to = thread_id_to; t->fragment_first = vnb->ip.reass.fragment_first; t->fragment_last = vnb->ip.reass.fragment_last; - t->trace_range.first_bi = reass->first_bi; - t->total_data_len = reass->data_len; + t->trace_range.first_bi = first_bi; + t->total_data_len = data_len; #if 0 static u8 *s = NULL; s = format (s, "%U", format_ip6_reass_trace, NULL, NULL, t); @@ -301,6 +317,13 @@ ip6_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node, } always_inline void +ip6_reass_free_ctx (ip6_reass_per_thread_t * rt, ip6_reass_t * reass) +{ + pool_put (rt->pool, reass); + --rt->reass_n; +} + +always_inline void ip6_reass_free (ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt, ip6_reass_t * reass) { @@ -312,8 +335,7 @@ ip6_reass_free (ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt, kv.key[4] = reass->key.as_u64[4]; kv.key[5] = reass->key.as_u64[5]; clib_bihash_add_del_48_8 (&rm->hash, &kv, 0); - pool_put (rt->pool, reass); - --rt->reass_n; + ip6_reass_free_ctx (rt, reass); } always_inline void @@ -398,8 +420,11 @@ ip6_reass_on_timeout (vlib_main_t * vm, vlib_node_runtime_t * node, *icmp_bi = reass->first_bi; if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED)) { - ip6_reass_add_trace (vm, node, rm, reass, reass->first_bi, - ICMP_ERROR_RT_EXCEEDED, 0); + ip6_reass_add_trace (vm, node, rm, reass->id, + reass->trace_op_counter, reass->first_bi, + reass->first_bi, reass->data_len, + ICMP_ERROR_RT_EXCEEDED, ~0); + ++reass->trace_op_counter; } // fragment with offset zero received - send icmp message back if (b->flags & VLIB_BUFFER_NEXT_PRESENT) @@ -425,18 +450,26 @@ 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_kv_t * kv, u32 * icmp_bi, u8 * do_handoff) { - ip6_reass_t *reass = NULL; - f64 now = vlib_time_now (rm->vlib_main); + ip6_reass_t *reass; + f64 now; + +again: + + reass = NULL; + now = vlib_time_now (vm); if (!clib_bihash_search_48_8 (&rm->hash, (clib_bihash_kv_48_8_t *) kv, (clib_bihash_kv_48_8_t *) kv)) { - if (vm->thread_index != kv->v.thread_index) + reass = + pool_elt_at_index (rm->per_thread_data + [kv->v.memory_owner_thread_index].pool, + kv->v.reass_index); + if (vm->thread_index != kv->v.memory_owner_thread_index) { *do_handoff = 1; - return NULL; + return reass; } - reass = pool_elt_at_index (rt->pool, kv->v.reass_index); if (now > reass->last_heard + rm->timeout) { @@ -478,13 +511,18 @@ ip6_reass_find_or_create (vlib_main_t * vm, vlib_node_runtime_t * node, 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; + kv->v.memory_owner_thread_index = vm->thread_index; reass->last_heard = now; - if (clib_bihash_add_del_48_8 (&rm->hash, (clib_bihash_kv_48_8_t *) kv, 1)) + int rv = + clib_bihash_add_del_48_8 (&rm->hash, (clib_bihash_kv_48_8_t *) kv, 2); + if (rv) { - ip6_reass_free (rm, rt, reass); + ip6_reass_free_ctx (rt, reass); reass = NULL; + // if other worker created a context already work with the other copy + if (-2 == rv) + goto again; } return reass; @@ -669,7 +707,10 @@ ip6_reass_finalize (vlib_main_t * vm, vlib_node_runtime_t * node, first_b->flags &= ~VLIB_BUFFER_EXT_HDR_VALID; if (PREDICT_FALSE (first_b->flags & VLIB_BUFFER_IS_TRACED)) { - ip6_reass_add_trace (vm, node, rm, reass, reass->first_bi, FINALIZE, 0); + ip6_reass_add_trace (vm, node, rm, reass->id, reass->trace_op_counter, + reass->first_bi, reass->first_bi, reass->data_len, + FINALIZE, ~0); + ++reass->trace_op_counter; #if 0 // following code does a hexdump of packet fragments to stdout ... do @@ -745,7 +786,8 @@ always_inline ip6_reass_rc_t ip6_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node, ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt, ip6_reass_t * reass, u32 * bi0, u32 * next0, u32 * error0, - ip6_frag_hdr_t * frag_hdr, bool is_custom_app) + ip6_frag_hdr_t * frag_hdr, bool is_custom_app, + u32 * handoff_thread_idx) { int consumed = 0; vlib_buffer_t *fb = vlib_get_buffer (vm, *bi0); @@ -835,8 +877,11 @@ ip6_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node, ip6_reass_free (rm, rt, reass); if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED)) { - ip6_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_OVERLAP, - 0); + ip6_reass_add_trace (vm, node, rm, reass->id, + reass->trace_op_counter, *bi0, + reass->first_bi, reass->data_len, + RANGE_OVERLAP, ~0); + ++reass->trace_op_counter; } *next0 = IP6_REASSEMBLY_NEXT_DROP; *error0 = IP6_ERROR_REASS_OVERLAPPING_FRAGMENT; @@ -850,7 +895,10 @@ check_if_done_maybe: { if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED)) { - ip6_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_NEW, 0); + ip6_reass_add_trace (vm, node, rm, reass->id, + reass->trace_op_counter, *bi0, reass->first_bi, + reass->data_len, RANGE_NEW, ~0); + ++reass->trace_op_counter; } } if (~0 != reass->last_packet_octet && @@ -858,6 +906,16 @@ check_if_done_maybe: { return ip6_reass_finalize (vm, node, rm, rt, reass, bi0, next0, error0, is_custom_app); + *handoff_thread_idx = reass->sendout_thread_index; + ip6_reass_rc_t rc = + ip6_reass_finalize (vm, node, rm, rt, reass, bi0, next0, error0, + is_custom_app); + if (IP6_REASS_RC_OK == rc + && reass->memory_owner_thread_index != reass->sendout_thread_index) + { + return IP6_REASS_RC_HANDOFF; + } + return rc; } else { @@ -1023,24 +1081,44 @@ ip6_reassembly_inline (vlib_main_t * vm, vlib_node_runtime_t * node, ip6_reass_find_or_create (vm, node, rm, rt, &kv, &icmp_bi, &do_handoff); + if (reass) + { + const u32 fragment_first = ip6_frag_hdr_offset (frag_hdr); + if (0 == fragment_first) + { + reass->sendout_thread_index = vm->thread_index; + } + } 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; + kv.v.memory_owner_thread_index; else vnet_buffer (b0)->ip.reass.owner_thread_index = - kv.v.thread_index; + kv.v.memory_owner_thread_index; } else if (reass) { + u32 handoff_thread_idx; switch (ip6_reass_update (vm, node, rm, rt, reass, &bi0, &next0, - &error0, frag_hdr, is_custom_app)) + &error0, frag_hdr, is_custom_app, + &handoff_thread_idx)) { case IP6_REASS_RC_OK: /* nothing to do here */ break; + case IP6_REASS_RC_HANDOFF: + next0 = IP6_REASSEMBLY_NEXT_HANDOFF; + b0 = vlib_get_buffer (vm, bi0); + if (is_feature) + vnet_buffer (b0)->ip.reass.owner_feature_thread_index = + handoff_thread_idx; + else + vnet_buffer (b0)->ip.reass.owner_thread_index = + handoff_thread_idx; + break; case IP6_REASS_RC_TOO_MANY_FRAGMENTS: vlib_node_increment_counter (vm, node->node_index, IP6_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG, @@ -1089,7 +1167,24 @@ ip6_reassembly_inline (vlib_main_t * vm, vlib_node_runtime_t * node, to_next[0] = bi0; to_next += 1; n_left_to_next -= 1; - if (is_feature && IP6_ERROR_NONE == error0) + if (next0 == IP6_REASSEMBLY_NEXT_HANDOFF) + { + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + if (is_feature) + ip6_reass_add_trace (vm, node, rm, ~0, + ~0, + bi0, ~0, ~0, HANDOFF, + vnet_buffer (b0)->ip. + reass.owner_feature_thread_index); + else + ip6_reass_add_trace (vm, node, rm, ~0, ~0, bi0, + ~0, ~0, HANDOFF, + vnet_buffer (b0)->ip. + reass.owner_thread_index); + } + } + else if (is_feature && IP6_ERROR_NONE == error0) { b0 = vlib_get_buffer (vm, bi0); vnet_feature_next (&next0, b0); @@ -1296,7 +1391,6 @@ ip6_reass_init_function (vlib_main_t * vm) vlib_node_t *node; rm->vlib_main = vm; - rm->vnet_main = vnet_get_main (); vec_validate (rm->per_thread_data, vlib_num_workers ()); ip6_reass_per_thread_t *rt; |