X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Finterface_output.c;h=251ff34ac9a11402a2538db6740a2c3b917198ee;hb=8c2dd1bf54af71e4b256bdf885efe2ac53fc6c86;hp=3f45cb9f0ef5282c4e24d5b360b1c0e21e5b2873;hpb=361abefcf86abeafc02a16d2a73e00409af5e66a;p=vpp.git diff --git a/src/vnet/interface_output.c b/src/vnet/interface_output.c index 3f45cb9f0ef..251ff34ac9a 100644 --- a/src/vnet/interface_output.c +++ b/src/vnet/interface_output.c @@ -38,12 +38,19 @@ */ #include +#include +#include +#include +#include #include typedef struct { u32 sw_if_index; - u8 data[128 - sizeof (u32)]; + u32 flags; + u16 gso_size; + u8 gso_l4_hdr_sz; + u8 data[128 - 3 * sizeof (u32)]; } interface_output_trace_t; @@ -55,7 +62,7 @@ format_vnet_interface_output_trace (u8 * s, va_list * va) interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *); vnet_main_t *vnm = vnet_get_main (); vnet_sw_interface_t *si; - uword indent; + u32 indent; if (t->sw_if_index != (u32) ~ 0) { @@ -65,24 +72,30 @@ format_vnet_interface_output_trace (u8 * s, va_list * va) (vnm->interface_main.sw_interfaces, t->sw_if_index)) { /* the interface may have been deleted by the time the trace is printed */ - s = format (s, "sw_if_index: %d\n%U%U", - t->sw_if_index, - format_white_space, indent, - node->format_buffer ? node-> - format_buffer : format_hex_bytes, t->data, - sizeof (t->data)); + s = format (s, "sw_if_index: %d ", t->sw_if_index); } else { si = vnet_get_sw_interface (vnm, t->sw_if_index); - - s = format (s, "%U\n%U%U", - format_vnet_sw_interface_name, vnm, si, - format_white_space, indent, - node->format_buffer ? node-> - format_buffer : format_hex_bytes, t->data, - sizeof (t->data)); + s = + format (s, "%U ", format_vnet_sw_interface_name, vnm, si, + t->flags); + } +#define _(bit, name, v, x) \ + if (v && (t->flags & VNET_BUFFER_F_##name)) \ + s = format (s, "%s ", v); + foreach_vnet_buffer_flag +#undef _ + if (t->flags & VNET_BUFFER_F_GSO) + { + s = format (s, "\n%Ugso_sz %d gso_l4_hdr_sz %d", + format_white_space, indent + 2, t->gso_size, + t->gso_l4_hdr_sz); } + s = + format (s, "\n%U%U", format_white_space, indent, + node->format_buffer ? node->format_buffer : format_hex_bytes, + t->data, sizeof (t->data)); } return s; } @@ -95,7 +108,7 @@ vnet_interface_output_trace (vlib_main_t * vm, u32 n_left, *from; n_left = n_buffers; - from = vlib_frame_args (frame); + from = vlib_frame_vector_args (frame); while (n_left >= 4) { @@ -117,15 +130,21 @@ vnet_interface_output_trace (vlib_main_t * vm, { t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0])); t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX]; - clib_memcpy (t0->data, vlib_buffer_get_current (b0), - sizeof (t0->data)); + t0->flags = b0->flags; + t0->gso_size = vnet_buffer2 (b0)->gso_size; + t0->gso_l4_hdr_sz = vnet_buffer2 (b0)->gso_l4_hdr_sz; + clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0), + sizeof (t0->data)); } if (b1->flags & VLIB_BUFFER_IS_TRACED) { t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0])); t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX]; - clib_memcpy (t1->data, vlib_buffer_get_current (b1), - sizeof (t1->data)); + t1->flags = b1->flags; + t1->gso_size = vnet_buffer2 (b1)->gso_size; + t1->gso_l4_hdr_sz = vnet_buffer2 (b1)->gso_l4_hdr_sz; + clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1), + sizeof (t1->data)); } from += 2; n_left -= 2; @@ -145,286 +164,312 @@ vnet_interface_output_trace (vlib_main_t * vm, { t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0])); t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX]; - clib_memcpy (t0->data, vlib_buffer_get_current (b0), - sizeof (t0->data)); + t0->flags = b0->flags; + t0->gso_size = vnet_buffer2 (b0)->gso_size; + t0->gso_l4_hdr_sz = vnet_buffer2 (b0)->gso_l4_hdr_sz; + clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0), + sizeof (t0->data)); } from += 1; n_left -= 1; } } -static never_inline u32 -slow_path (vlib_main_t * vm, - u32 bi, - vlib_buffer_t * b, - u32 n_left_to_tx, u32 * to_tx, u32 * n_slow_bytes_result) +static_always_inline void +calc_checksums (vlib_main_t * vm, vlib_buffer_t * b) { - /* We've already enqueued a single buffer. */ - u32 n_buffers = 0; - u32 n_slow_bytes = 0; + ip4_header_t *ip4; + ip6_header_t *ip6; + tcp_header_t *th; + udp_header_t *uh; - while (n_left_to_tx > 0) - { - to_tx[0] = bi; - to_tx += 1; - n_left_to_tx -= 1; - n_buffers += 1; - n_slow_bytes += vlib_buffer_length_in_chain (vm, b); - - /* Be grumpy about zero length buffers for benefit of - driver tx function. */ - ASSERT (b->current_length > 0); + int is_ip4 = (b->flags & VNET_BUFFER_F_IS_IP4) != 0; + int is_ip6 = (b->flags & VNET_BUFFER_F_IS_IP6) != 0; - if (!(b->flags & VLIB_BUFFER_NEXT_PRESENT)) - break; + ASSERT (!(is_ip4 && is_ip6)); - bi = b->next_buffer; - b = vlib_get_buffer (vm, bi); - } - - /* Ran out of space in next frame trying to enqueue buffers? */ - if (b->flags & VLIB_BUFFER_NEXT_PRESENT) - return 0; - - *n_slow_bytes_result = n_slow_bytes; - return n_buffers; -} + ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset); + ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset); + th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset); + uh = (udp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset); -/* - * Increment TX stats. Roll up consecutive increments to the same sw_if_index - * into one increment. - */ -static_always_inline void -incr_output_stats (vnet_main_t * vnm, - u32 thread_index, - u32 length, - u32 sw_if_index, - u32 * last_sw_if_index, u32 * n_packets, u32 * n_bytes) -{ - vnet_interface_main_t *im; - - if (PREDICT_TRUE (sw_if_index == *last_sw_if_index)) + if (is_ip4) { - *n_packets += 1; - *n_bytes += length; + ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset); + if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM) + ip4->checksum = ip4_header_checksum (ip4); + if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM) + { + th->checksum = 0; + th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4); + } + if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) + uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4); } - else + if (is_ip6) { - if (PREDICT_TRUE (*last_sw_if_index != ~0)) + int bogus; + if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM) { - im = &vnm->interface_main; - - vlib_increment_combined_counter (im->combined_sw_if_counters - + VNET_INTERFACE_COUNTER_TX, - thread_index, - *last_sw_if_index, - *n_packets, *n_bytes); + th->checksum = 0; + th->checksum = + ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus); + } + if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) + { + uh->checksum = 0; + uh->checksum = + ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus); } - *last_sw_if_index = sw_if_index; - *n_packets = 1; - *n_bytes = length; } -} + b->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM; + b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM; + b->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM; +} -/* Interface output functions. */ -uword -vnet_interface_output_node_flatten (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +static_always_inline u16 +tso_alloc_tx_bufs (vlib_main_t * vm, + vnet_interface_per_thread_data_t * ptd, + vlib_buffer_t * b0, u16 l4_hdr_sz) { - vnet_main_t *vnm = vnet_get_main (); - vnet_interface_output_runtime_t *rt = (void *) node->runtime_data; - vnet_sw_interface_t *si; - vnet_hw_interface_t *hi; - u32 n_left_to_tx, *from, *from_end, *to_tx; - u32 n_bytes, n_buffers, n_packets; - u32 last_sw_if_index; - u32 thread_index = vm->thread_index; + u32 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0); + u16 gso_size = vnet_buffer2 (b0)->gso_size; + u16 l234_sz = vnet_buffer (b0)->l4_hdr_offset + l4_hdr_sz; + /* rounded-up division */ + u16 n_bufs = (n_bytes_b0 - l234_sz + (gso_size - 1)) / gso_size; + u16 n_alloc; + + ASSERT (n_bufs > 0); + vec_validate (ptd->split_buffers, n_bufs - 1); + + n_alloc = vlib_buffer_alloc (vm, ptd->split_buffers, n_bufs); + if (n_alloc < n_bufs) + { + vlib_buffer_free (vm, ptd->split_buffers, n_alloc); + return 0; + } + return 1; +} - n_buffers = frame->n_vectors; +static_always_inline void +tso_init_buf_from_template_base (vlib_buffer_t * nb0, vlib_buffer_t * b0, + u32 flags, u16 length) +{ + nb0->current_data = 0; + nb0->total_length_not_including_first_buffer = 0; + nb0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID | flags; + clib_memcpy_fast (&nb0->opaque, &b0->opaque, sizeof (nb0->opaque)); + clib_memcpy_fast (nb0->data, b0->data, length); + nb0->current_length = length; +} - if (node->flags & VLIB_NODE_FLAG_TRACE) - vnet_interface_output_trace (vm, node, frame, n_buffers); +static_always_inline void +tso_init_buf_from_template (vlib_main_t * vm, vlib_buffer_t * nb0, + vlib_buffer_t * b0, u16 template_data_sz, + u16 gso_size, u8 ** p_dst_ptr, u16 * p_dst_left, + u32 next_tcp_seq, u32 flags) +{ + tso_init_buf_from_template_base (nb0, b0, flags, template_data_sz); - from = vlib_frame_args (frame); + *p_dst_left = + clib_min (gso_size, + vlib_buffer_get_default_data_size (vm) - template_data_sz); + *p_dst_ptr = nb0->data + template_data_sz; - if (rt->is_deleted) - return vlib_error_drop_buffers (vm, node, from, - /* buffer stride */ 1, - n_buffers, - VNET_INTERFACE_OUTPUT_NEXT_DROP, - node->node_index, - VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED); + tcp_header_t *tcp = + (tcp_header_t *) (nb0->data + vnet_buffer (nb0)->l4_hdr_offset); + tcp->seq_number = clib_host_to_net_u32 (next_tcp_seq); +} - si = vnet_get_sw_interface (vnm, rt->sw_if_index); - hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index); - if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) || - !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)) - { - vlib_simple_counter_main_t *cm; +static_always_inline void +tso_fixup_segmented_buf (vlib_buffer_t * b0, u8 tcp_flags, int is_ip6) +{ + u16 l3_hdr_offset = vnet_buffer (b0)->l3_hdr_offset; + u16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset; + ip4_header_t *ip4 = (ip4_header_t *) (b0->data + l3_hdr_offset); + ip6_header_t *ip6 = (ip6_header_t *) (b0->data + l3_hdr_offset); + tcp_header_t *tcp = (tcp_header_t *) (b0->data + l4_hdr_offset); + + tcp->flags = tcp_flags; + + if (is_ip6) + ip6->payload_length = + clib_host_to_net_u16 (b0->current_length - + vnet_buffer (b0)->l4_hdr_offset); + else + ip4->length = + clib_host_to_net_u16 (b0->current_length - + vnet_buffer (b0)->l3_hdr_offset); +} - cm = vec_elt_at_index (vnm->interface_main.sw_if_counters, - VNET_INTERFACE_COUNTER_TX_ERROR); - vlib_increment_simple_counter (cm, thread_index, - rt->sw_if_index, n_buffers); - return vlib_error_drop_buffers (vm, node, from, - /* buffer stride */ 1, - n_buffers, - VNET_INTERFACE_OUTPUT_NEXT_DROP, - node->node_index, - VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN); - } +/** + * Allocate the necessary number of ptd->split_buffers, + * and segment the possibly chained buffer(s) from b0 into + * there. + * + * Return the cumulative number of bytes sent or zero + * if allocation failed. + */ - from_end = from + n_buffers; +static_always_inline u32 +tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd, + int do_tx_offloads, u32 sbi0, vlib_buffer_t * sb0, + u32 n_bytes_b0) +{ + u32 n_tx_bytes = 0; + int is_ip4 = sb0->flags & VNET_BUFFER_F_IS_IP4; + int is_ip6 = sb0->flags & VNET_BUFFER_F_IS_IP6; + ASSERT (is_ip4 || is_ip6); + ASSERT (sb0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID); + ASSERT (sb0->flags & VNET_BUFFER_F_L3_HDR_OFFSET_VALID); + ASSERT (sb0->flags & VNET_BUFFER_F_L4_HDR_OFFSET_VALID); + u16 gso_size = vnet_buffer2 (sb0)->gso_size; + + int l4_hdr_sz = vnet_buffer2 (sb0)->gso_l4_hdr_sz; + u8 save_tcp_flags = 0; + u8 tcp_flags_no_fin_psh = 0; + u32 next_tcp_seq = 0; + + tcp_header_t *tcp = + (tcp_header_t *) (sb0->data + vnet_buffer (sb0)->l4_hdr_offset); + next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number); + /* store original flags for last packet and reset FIN and PSH */ + save_tcp_flags = tcp->flags; + tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH); + tcp->checksum = 0; + + u32 default_bflags = + sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT); + u16 l234_sz = vnet_buffer (sb0)->l4_hdr_offset + l4_hdr_sz; + int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz); + next_tcp_seq += first_data_size; + + if (PREDICT_FALSE (!tso_alloc_tx_bufs (vm, ptd, sb0, l4_hdr_sz))) + return 0; - /* Total byte count of all buffers. */ - n_bytes = 0; - n_packets = 0; - last_sw_if_index = ~0; + vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]); + tso_init_buf_from_template_base (b0, sb0, default_bflags, + l4_hdr_sz + first_data_size); - while (from < from_end) + u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size; + if (total_src_left) { - /* Get new next frame since previous incomplete frame may have less - than VNET_FRAME_SIZE vectors in it. */ - vlib_get_new_next_frame (vm, node, VNET_INTERFACE_OUTPUT_NEXT_TX, - to_tx, n_left_to_tx); - - while (from + 4 <= from_end && n_left_to_tx >= 2) + /* Need to copy more segments */ + u8 *src_ptr, *dst_ptr; + u16 src_left, dst_left; + /* current source buffer */ + vlib_buffer_t *csb0 = sb0; + u32 csbi0 = sbi0; + /* current dest buffer */ + vlib_buffer_t *cdb0; + u16 dbi = 1; /* the buffer [0] is b0 */ + + src_ptr = sb0->data + l234_sz + first_data_size; + src_left = sb0->current_length - l234_sz - first_data_size; + b0->current_length = l234_sz + first_data_size; + + tso_fixup_segmented_buf (b0, tcp_flags_no_fin_psh, is_ip6); + if (do_tx_offloads) + calc_checksums (vm, b0); + + /* grab a second buffer and prepare the loop */ + ASSERT (dbi < vec_len (ptd->split_buffers)); + cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]); + tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr, + &dst_left, next_tcp_seq, default_bflags); + + /* an arbitrary large number to catch the runaway loops */ + int nloops = 2000; + while (total_src_left) { - u32 bi0, bi1; - vlib_buffer_t *b0, *b1; + ASSERT (nloops-- > 0); + u16 bytes_to_copy = clib_min (src_left, dst_left); - /* Prefetch next iteration. */ - vlib_prefetch_buffer_with_index (vm, from[2], LOAD); - vlib_prefetch_buffer_with_index (vm, from[3], LOAD); - - bi0 = from[0]; - bi1 = from[1]; - to_tx[0] = bi0; - to_tx[1] = bi1; - from += 2; - to_tx += 2; - n_left_to_tx -= 2; - - b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); + clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy); - /* Be grumpy about zero length buffers for benefit of - driver tx function. */ - ASSERT (b0->current_length > 0); - ASSERT (b1->current_length > 0); + src_left -= bytes_to_copy; + src_ptr += bytes_to_copy; + total_src_left -= bytes_to_copy; + dst_left -= bytes_to_copy; + dst_ptr += bytes_to_copy; + next_tcp_seq += bytes_to_copy; + cdb0->current_length += bytes_to_copy; - if (PREDICT_FALSE - ((b0->flags | b1->flags) & VLIB_BUFFER_NEXT_PRESENT)) + if (0 == src_left) { - u32 n_buffers, n_slow_bytes, i; + int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT); + u32 next_bi = csb0->next_buffer; - /* Undo. */ - from -= 2; - to_tx -= 2; - n_left_to_tx += 2; - - /* Do slow path two times. */ - for (i = 0; i < 2; i++) + /* init src to the next buffer in chain */ + if (has_next) { - u32 bi = i ? bi1 : bi0; - vlib_buffer_t *b = i ? b1 : b0; - - n_buffers = slow_path (vm, bi, b, - n_left_to_tx, to_tx, &n_slow_bytes); - - /* Not enough room for single packet? */ - if (n_buffers == 0) - goto put; - - from += 1; - to_tx += n_buffers; - n_left_to_tx -= n_buffers; - incr_output_stats (vnm, thread_index, n_slow_bytes, - vnet_buffer (b)->sw_if_index[VLIB_TX], - &last_sw_if_index, &n_packets, &n_bytes); + csbi0 = next_bi; + csb0 = vlib_get_buffer (vm, csbi0); + src_left = csb0->current_length; + src_ptr = csb0->data; + } + else + { + ASSERT (total_src_left == 0); + break; } } - else + if (0 == dst_left && total_src_left) { - incr_output_stats (vnm, thread_index, - vlib_buffer_length_in_chain (vm, b0), - vnet_buffer (b0)->sw_if_index[VLIB_TX], - &last_sw_if_index, &n_packets, &n_bytes); - incr_output_stats (vnm, thread_index, - vlib_buffer_length_in_chain (vm, b0), - vnet_buffer (b1)->sw_if_index[VLIB_TX], - &last_sw_if_index, &n_packets, &n_bytes); + if (do_tx_offloads) + calc_checksums (vm, cdb0); + n_tx_bytes += cdb0->current_length; + ASSERT (dbi < vec_len (ptd->split_buffers)); + cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]); + tso_init_buf_from_template (vm, cdb0, b0, l234_sz, + gso_size, &dst_ptr, &dst_left, + next_tcp_seq, default_bflags); } } - while (from + 1 <= from_end && n_left_to_tx >= 1) - { - u32 bi0; - vlib_buffer_t *b0; - - bi0 = from[0]; - to_tx[0] = bi0; - from += 1; - to_tx += 1; - n_left_to_tx -= 1; - - b0 = vlib_get_buffer (vm, bi0); - - /* Be grumpy about zero length buffers for benefit of - driver tx function. */ - ASSERT (b0->current_length > 0); - - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_NEXT_PRESENT)) - { - u32 n_buffers, n_slow_bytes; - - /* Undo. */ - from -= 1; - to_tx -= 1; - n_left_to_tx += 1; + tso_fixup_segmented_buf (cdb0, save_tcp_flags, is_ip6); + if (do_tx_offloads) + calc_checksums (vm, cdb0); - n_buffers = slow_path (vm, bi0, b0, - n_left_to_tx, to_tx, &n_slow_bytes); - - /* Not enough room for single packet? */ - if (n_buffers == 0) - goto put; - - from += 1; - to_tx += n_buffers; - n_left_to_tx -= n_buffers; - } - incr_output_stats (vnm, thread_index, - vlib_buffer_length_in_chain (vm, b0), - vnet_buffer (b0)->sw_if_index[VLIB_TX], - &last_sw_if_index, &n_packets, &n_bytes); - } - - put: - vlib_put_next_frame (vm, node, VNET_INTERFACE_OUTPUT_NEXT_TX, - n_left_to_tx); + n_tx_bytes += cdb0->current_length; } + n_tx_bytes += b0->current_length; + return n_tx_bytes; +} - /* Final update of interface stats. */ - incr_output_stats (vnm, thread_index, 0, ~0, /* ~0 will flush stats */ - &last_sw_if_index, &n_packets, &n_bytes); +static_always_inline void +drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm, + vlib_node_runtime_t * node, u32 * pbi0, + u32 drop_error_code) +{ + u32 thread_index = vm->thread_index; + vnet_interface_output_runtime_t *rt = (void *) node->runtime_data; - return n_buffers; + vlib_simple_counter_main_t *cm; + cm = + vec_elt_at_index (vnm->interface_main.sw_if_counters, + VNET_INTERFACE_COUNTER_TX_ERROR); + vlib_increment_simple_counter (cm, thread_index, rt->sw_if_index, 1); + + vlib_error_drop_buffers (vm, node, pbi0, + /* buffer stride */ 1, + /* n_buffers */ 1, + VNET_INTERFACE_OUTPUT_NEXT_DROP, + node->node_index, drop_error_code); } -VLIB_NODE_FUNCTION_MULTIARCH_CLONE (vnet_interface_output_node_flatten); -CLIB_MULTIARCH_SELECT_FN (vnet_interface_output_node_flatten); - -uword -vnet_interface_output_node (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) +static_always_inline uword +vnet_interface_output_node_inline_gso (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + vnet_main_t * vnm, + vnet_hw_interface_t * hi, + int do_tx_offloads, + int do_segmentation) { - vnet_main_t *vnm = vnet_get_main (); vnet_interface_output_runtime_t *rt = (void *) node->runtime_data; vnet_sw_interface_t *si; - vnet_hw_interface_t *hi; u32 n_left_to_tx, *from, *from_end, *to_tx; u32 n_bytes, n_buffers, n_packets; u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3; @@ -433,13 +478,15 @@ vnet_interface_output_node (vlib_main_t * vm, u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX; u32 current_config_index = ~0; u8 arc = im->output_feature_arc_index; + vnet_interface_per_thread_data_t *ptd = + vec_elt_at_index (im->per_thread_data, thread_index); n_buffers = frame->n_vectors; if (node->flags & VLIB_NODE_FLAG_TRACE) vnet_interface_output_trace (vm, node, frame, n_buffers); - from = vlib_frame_args (frame); + from = vlib_frame_vector_args (frame); if (rt->is_deleted) return vlib_error_drop_buffers (vm, node, from, @@ -451,7 +498,8 @@ vnet_interface_output_node (vlib_main_t * vm, si = vnet_get_sw_interface (vnm, rt->sw_if_index); hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index); - if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) || + if (!(si->flags & (VNET_SW_INTERFACE_FLAG_ADMIN_UP | + VNET_SW_INTERFACE_FLAG_BOND_SLAVE)) || !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)) { vlib_simple_counter_main_t *cm; @@ -497,6 +545,7 @@ vnet_interface_output_node (vlib_main_t * vm, u32 bi0, bi1, bi2, bi3; vlib_buffer_t *b0, *b1, *b2, *b3; u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3; + u32 or_flags; /* Prefetch next iteration. */ vlib_prefetch_buffer_with_index (vm, from[4], LOAD); @@ -512,15 +561,30 @@ vnet_interface_output_node (vlib_main_t * vm, to_tx[1] = bi1; to_tx[2] = bi2; to_tx[3] = bi3; - from += 4; - to_tx += 4; - n_left_to_tx -= 4; + if (!do_segmentation) + { + from += 4; + to_tx += 4; + n_left_to_tx -= 4; + } b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); b2 = vlib_get_buffer (vm, bi2); b3 = vlib_get_buffer (vm, bi3); + if (do_segmentation) + { + or_flags = b0->flags | b1->flags | b2->flags | b3->flags; + + /* go to single loop if we need TSO segmentation */ + if (PREDICT_FALSE (or_flags & VNET_BUFFER_F_GSO)) + break; + from += 4; + to_tx += 4; + n_left_to_tx -= 4; + } + /* Be grumpy about zero length buffers for benefit of driver tx function. */ ASSERT (b0->current_length > 0); @@ -543,10 +607,10 @@ vnet_interface_output_node (vlib_main_t * vm, if (PREDICT_FALSE (current_config_index != ~0)) { - b0->feature_arc_index = arc; - b1->feature_arc_index = arc; - b2->feature_arc_index = arc; - b3->feature_arc_index = arc; + vnet_buffer (b0)->feature_arc_index = arc; + vnet_buffer (b1)->feature_arc_index = arc; + vnet_buffer (b2)->feature_arc_index = arc; + vnet_buffer (b3)->feature_arc_index = arc; b0->current_config_index = current_config_index; b1->current_config_index = current_config_index; b2->current_config_index = current_config_index; @@ -587,6 +651,23 @@ vnet_interface_output_node (vlib_main_t * vm, thread_index, tx_swif3, 1, n_bytes_b3); } + + if (!do_segmentation) + or_flags = b0->flags | b1->flags | b2->flags | b3->flags; + + if (do_tx_offloads) + { + if (or_flags & + (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM | + VNET_BUFFER_F_OFFLOAD_UDP_CKSUM | + VNET_BUFFER_F_OFFLOAD_IP_CKSUM)) + { + calc_checksums (vm, b0); + calc_checksums (vm, b1); + calc_checksums (vm, b2); + calc_checksums (vm, b3); + } + } } while (from + 1 <= from_end && n_left_to_tx >= 1) @@ -614,10 +695,89 @@ vnet_interface_output_node (vlib_main_t * vm, if (PREDICT_FALSE (current_config_index != ~0)) { - b0->feature_arc_index = arc; + vnet_buffer (b0)->feature_arc_index = arc; b0->current_config_index = current_config_index; } + if (do_segmentation) + { + if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_GSO)) + { + /* + * Undo the enqueue of the b0 - it is not going anywhere, + * and will be freed either after it's segmented or + * when dropped, if there is no buffers to segment into. + */ + to_tx -= 1; + n_left_to_tx += 1; + /* undo the counting. */ + n_bytes -= n_bytes_b0; + n_packets -= 1; + + u32 n_tx_bytes = 0; + + n_tx_bytes = + tso_segment_buffer (vm, ptd, do_tx_offloads, bi0, b0, + n_bytes_b0); + + if (PREDICT_FALSE (n_tx_bytes == 0)) + { + drop_one_buffer_and_count (vm, vnm, node, from - 1, + VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO); + continue; + } + + u16 n_tx_bufs = vec_len (ptd->split_buffers); + u32 *from_tx_seg = ptd->split_buffers; + + while (n_tx_bufs > 0) + { + if (n_tx_bufs >= n_left_to_tx) + { + while (n_left_to_tx > 0) + { + to_tx[0] = from_tx_seg[0]; + to_tx += 1; + from_tx_seg += 1; + n_left_to_tx -= 1; + n_tx_bufs -= 1; + n_packets += 1; + } + vlib_put_next_frame (vm, node, next_index, + n_left_to_tx); + vlib_get_new_next_frame (vm, node, next_index, + to_tx, n_left_to_tx); + } + else + { + while (n_tx_bufs > 0) + { + to_tx[0] = from_tx_seg[0]; + to_tx += 1; + from_tx_seg += 1; + n_left_to_tx -= 1; + n_tx_bufs -= 1; + n_packets += 1; + } + } + } + n_bytes += n_tx_bytes; + if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index)) + { + + vlib_increment_combined_counter + (im->combined_sw_if_counters + + VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif0, + _vec_len (ptd->split_buffers), n_tx_bytes); + } + /* The buffers were enqueued. Reset the length */ + _vec_len (ptd->split_buffers) = 0; + /* Free the now segmented buffer */ + vlib_buffer_free_one (vm, bi0); + continue; + } + } + if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index)) { @@ -626,6 +786,9 @@ vnet_interface_output_node (vlib_main_t * vm, thread_index, tx_swif0, 1, n_bytes_b0); } + + if (do_tx_offloads) + calc_checksums (vm, b0); } vlib_put_next_frame (vm, node, next_index, n_left_to_tx); @@ -639,8 +802,49 @@ vnet_interface_output_node (vlib_main_t * vm, return n_buffers; } -VLIB_NODE_FUNCTION_MULTIARCH_CLONE (vnet_interface_output_node); -CLIB_MULTIARCH_SELECT_FN (vnet_interface_output_node); +static_always_inline uword +vnet_interface_output_node_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, vnet_main_t * vnm, + vnet_hw_interface_t * hi, + int do_tx_offloads) +{ + /* + * The 3-headed "if" is here because we want to err on the side + * of not impacting the non-GSO performance - so for the more + * common case of no GSO interfaces we want to prevent the + * segmentation codepath from being there altogether. + */ + if (PREDICT_TRUE (vnm->interface_main.gso_interface_count == 0)) + return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi, + do_tx_offloads, + /* do_segmentation */ 0); + else if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) + return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi, + do_tx_offloads, + /* do_segmentation */ 0); + else + return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi, + do_tx_offloads, + /* do_segmentation */ 1); +} + +uword +vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + vnet_main_t *vnm = vnet_get_main (); + vnet_hw_interface_t *hi; + vnet_interface_output_runtime_t *rt = (void *) node->runtime_data; + hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index); + + if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD) + return vnet_interface_output_node_inline (vm, node, frame, vnm, hi, + /* do_tx_offloads */ 0); + else + return vnet_interface_output_node_inline (vm, node, frame, vnm, hi, + /* do_tx_offloads */ 1); +} /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */ static uword @@ -654,7 +858,7 @@ vnet_per_buffer_interface_output (vlib_main_t * vm, n_left_from = frame->n_vectors; - from = vlib_frame_args (frame); + from = vlib_frame_vector_args (frame); next_index = node->cached_next_index; while (n_left_from > 0) @@ -692,8 +896,8 @@ vnet_per_buffer_interface_output (vlib_main_t * vm, vnet_buffer (b1)->sw_if_index [VLIB_TX]); - next0 = hi0->hw_if_index; - next1 = hi1->hw_if_index; + next0 = hi0->output_node_next_index; + next1 = hi1->output_node_next_index; vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, @@ -720,7 +924,7 @@ vnet_per_buffer_interface_output (vlib_main_t * vm, vnet_buffer (b0)->sw_if_index [VLIB_TX]); - next0 = hi0->hw_if_index; + next0 = hi0->output_node_next_index; vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); @@ -848,7 +1052,7 @@ static u8 * validate_error_frame (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * f) { - u32 *buffers = vlib_frame_args (f); + u32 *buffers = vlib_frame_vector_args (f); vlib_buffer_t *b; u8 *msg = 0; uword i; @@ -898,7 +1102,7 @@ process_drop_punt (vlib_main_t * vm, static vlib_error_t memory[VNET_ERROR_N_DISPOSITION]; static char memory_init[VNET_ERROR_N_DISPOSITION]; - buffers = vlib_frame_args (frame); + buffers = vlib_frame_vector_args (frame); first_buffer = buffers; { @@ -1195,6 +1399,37 @@ VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node,static) = { }; /* *INDENT-ON* */ +/* Convenience node to drop a vector of buffers with a "misc error". */ +static uword +misc_drop_buffers (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return vlib_error_drop_buffers (vm, node, vlib_frame_vector_args (frame), + /* buffer stride */ 1, + frame->n_vectors, + /* next */ 0, + node->node_index, + /* error */ 0); +} + +static char *misc_drop_buffers_error_strings[] = { + [0] = "misc. errors", +}; + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (misc_drop_buffers_node,static) = { + .function = misc_drop_buffers, + .name = "misc-drop-buffers", + .vector_size = sizeof (u32), + .n_errors = 1, + .n_next_nodes = 1, + .next_nodes = { + "error-drop", + }, + .error_strings = misc_drop_buffers_error_strings, +}; +/* *INDENT-ON* */ + VLIB_NODE_FUNCTION_MULTIARCH (vnet_per_buffer_interface_output_node, vnet_per_buffer_interface_output); @@ -1259,6 +1494,7 @@ VNET_FEATURE_ARC_INIT (interface_output, static) = { .arc_name = "interface-output", .start_nodes = VNET_FEATURES (0), + .last_in_arc = "interface-tx", .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index, }; @@ -1268,6 +1504,12 @@ VNET_FEATURE_INIT (span_tx, static) = { .runs_before = VNET_FEATURES ("interface-tx"), }; +VNET_FEATURE_INIT (ipsec_if_tx, static) = { + .arc_name = "interface-output", + .node_name = "ipsec-if-output", + .runs_before = VNET_FEATURES ("interface-tx"), +}; + VNET_FEATURE_INIT (interface_tx, static) = { .arc_name = "interface-output", .node_name = "interface-tx", @@ -1283,12 +1525,13 @@ vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm, vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index); u32 next_index; - next_index = vlib_node_add_next_with_slot - (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, - hi->output_node_index, - /* next_index */ hw_if_index); + if (hi->output_node_index == 0) + return 0; - ASSERT (next_index == hw_if_index); + next_index = vlib_node_add_next + (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, + hi->output_node_index); + hi->output_node_next_index = next_index; return 0; } @@ -1296,6 +1539,18 @@ vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm, VNET_HW_INTERFACE_ADD_DEL_FUNCTION (vnet_per_buffer_interface_output_hw_interface_add_del); +void +vnet_set_interface_output_node (vnet_main_t * vnm, + u32 hw_if_index, u32 node_index) +{ + ASSERT (node_index); + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index); + u32 next_index = vlib_node_add_next + (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index); + hi->output_node_next_index = next_index; + hi->output_node_index = node_index; +} + static clib_error_t * pcap_drop_trace_command_fn (vlib_main_t * vm, unformat_input_t * input, @@ -1317,7 +1572,7 @@ pcap_drop_trace_command_fn (vlib_main_t * vm, if (im->pcap_filename == 0) im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0); - memset (&im->pcap_main, 0, sizeof (im->pcap_main)); + clib_memset (&im->pcap_main, 0, sizeof (im->pcap_main)); im->pcap_main.file_name = (char *) im->pcap_filename; im->pcap_main.n_packets_to_capture = 100; if (im->pcap_pkts_to_capture)