VNET GSO
I: gso
M: Andrew Yourtchenko <ayourtch@gmail.com>
+M: Mohsin Kazmi <sykazmi@cisco.com>
F: src/vnet/interface_output.c
Plugin - MAP
_(l2_interface_pbb_tag_rewrite_reply) \
_(set_punt_reply) \
_(feature_enable_disable_reply) \
+_(feature_gso_enable_disable_reply) \
_(sw_interface_tag_add_del_reply) \
_(sw_interface_add_del_mac_address_reply) \
_(hw_interface_set_mtu_reply) \
_(IP_TABLE_DETAILS, ip_table_details) \
_(IP_ROUTE_DETAILS, ip_route_details) \
_(FEATURE_ENABLE_DISABLE_REPLY, feature_enable_disable_reply) \
+_(FEATURE_GSO_ENABLE_DISABLE_REPLY, feature_gso_enable_disable_reply) \
_(SW_INTERFACE_TAG_ADD_DEL_REPLY, sw_interface_tag_add_del_reply) \
_(SW_INTERFACE_ADD_DEL_MAC_ADDRESS_REPLY, sw_interface_add_del_mac_address_reply) \
_(L2_XCONNECT_DETAILS, l2_xconnect_details) \
return ret;
}
+static int
+api_feature_gso_enable_disable (vat_main_t * vam)
+{
+ unformat_input_t *i = vam->input;
+ vl_api_feature_gso_enable_disable_t *mp;
+ u32 sw_if_index = ~0;
+ u8 enable = 1;
+ int ret;
+
+ while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (i, "%U", api_unformat_sw_if_index, vam, &sw_if_index))
+ ;
+ else if (unformat (i, "sw_if_index %d", &sw_if_index))
+ ;
+ else if (unformat (i, "enable"))
+ enable = 1;
+ else if (unformat (i, "disable"))
+ enable = 0;
+ else
+ break;
+ }
+
+ if (sw_if_index == ~0)
+ {
+ errmsg ("missing interface name or sw_if_index");
+ return -99;
+ }
+
+ /* Construct the API message */
+ M (FEATURE_GSO_ENABLE_DISABLE, mp);
+ mp->sw_if_index = ntohl (sw_if_index);
+ mp->enable_disable = enable;
+
+ S (mp);
+ W (ret);
+ return ret;
+}
+
static int
api_sw_interface_tag_add_del (vat_main_t * vam)
{
_(ip_mroute_dump, "table-id [ip4|ip6]") \
_(feature_enable_disable, "arc_name <arc_name> " \
"feature_name <feature_name> <intfc> | sw_if_index <nn> [disable]") \
+_(feature_gso_enable_disable, "<intfc> | sw_if_index <nn> " \
+ "[enable | disable] ") \
_(sw_interface_tag_add_del, "<intfc> | sw_if_index <nn> tag <text>" \
"[disable]") \
_(sw_interface_add_del_mac_address, "<intfc> | sw_if_index <nn> " \
list(APPEND VNET_API_FILES ipfix-export/ipfix_export.api)
+##############################################################################
+# GSO
+##############################################################################
+list(APPEND VNET_SOURCES
+ gso/cli.c
+ gso/gso.c
+ gso/gso_api.c
+ gso/node.c
+)
+
+list(APPEND VNET_HEADERS
+ gso/gso.h
+)
+
+list(APPEND VNET_API_FILES
+ gso/gso.api
+)
+
##############################################################################
# IPFIX classify code
##############################################################################
--- /dev/null
+/*
+ * Copyright (c) 2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vppinfra/error.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/feature/feature.h>
+#include <vnet/gso/gso.h>
+
+static clib_error_t *
+set_interface_feature_gso_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ unformat_input_t _line_input, *line_input = &_line_input;
+ clib_error_t *error = 0;
+
+ u32 sw_if_index = ~0;
+ u8 enable = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat
+ (line_input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else if (unformat (line_input, "enable"))
+ enable = 1;
+ else if (unformat (line_input, "disable"))
+ enable = 0;
+ else
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ }
+
+ if (sw_if_index == ~0)
+ {
+ error = clib_error_return (0, "Interface not specified...");
+ goto done;
+ }
+ int rv = vnet_sw_interface_gso_enable_disable (sw_if_index, enable);
+
+ switch (rv)
+ {
+ case VNET_API_ERROR_INVALID_VALUE:
+ error = clib_error_return (0, "interface type is not hardware");
+ break;
+ case VNET_API_ERROR_FEATURE_DISABLED:
+ error = clib_error_return (0, "interface should be ethernet interface");
+ break;
+ default:
+ ;
+ }
+
+done:
+ unformat_free (line_input);
+ return error;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_feature_gso_command, static) = {
+ .path = "set interface feature gso",
+ .short_help = "set interface feature gso <intfc> [enable | disable]",
+ .function = set_interface_feature_gso_command_fn,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+option version = "1.0.0";
+
+import "vnet/interface_types.api";
+
+/** \brief Enable or disable interface feature gso arc
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param sw_if_index - The interface to enable/disable gso feature arc.
+ @param enable_disable - set to 1 to enable, 0 to disable gso feature arc
+*/
+autoreply define feature_gso_enable_disable
+{
+ u32 client_index;
+ u32 context;
+ vl_api_interface_index_t sw_if_index;
+ bool enable_disable;
+ option vat_help = "<intfc> | sw_if_index <nn> [enable | disable]";
+};
+
+/*
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vppinfra/error.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/feature/feature.h>
+#include <vnet/l2/l2_in_out_feat_arc.h>
+#include <vnet/gso/gso.h>
+
+gso_main_t gso_main;
+
+int
+vnet_sw_interface_gso_enable_disable (u32 sw_if_index, u8 enable)
+{
+ ethernet_interface_t *eif;
+ vnet_sw_interface_t *si;
+ ethernet_main_t *em;
+ vnet_main_t *vnm;
+
+ vnm = vnet_get_main ();
+ em = ðernet_main;
+ si = vnet_get_sw_interface (vnm, sw_if_index);
+
+ /*
+ * only ethernet HW interfaces are supported at this time
+ */
+ if (si->type != VNET_SW_INTERFACE_TYPE_HARDWARE)
+ {
+ return (VNET_API_ERROR_INVALID_VALUE);
+ }
+
+ eif = ethernet_get_interface (em, si->hw_if_index);
+
+ if (!eif)
+ {
+ return (VNET_API_ERROR_FEATURE_DISABLED);
+ }
+
+ vnet_feature_enable_disable ("ip4-output", "gso-ip4", sw_if_index, enable,
+ 0, 0);
+ vnet_feature_enable_disable ("ip6-output", "gso-ip6", sw_if_index, enable,
+ 0, 0);
+
+ vnet_l2_feature_enable_disable ("l2-output-nonip", "gso-l2-nonip",
+ sw_if_index, enable, 0, 0);
+ vnet_l2_feature_enable_disable ("l2-output-ip4", "gso-l2-ip4",
+ sw_if_index, enable, 0, 0);
+ vnet_l2_feature_enable_disable ("l2-output-ip6", "gso-l2-ip6",
+ sw_if_index, enable, 0, 0);
+
+ return (0);
+}
+
+static clib_error_t *
+gso_init (vlib_main_t * vm)
+{
+ gso_main_t *gm = &gso_main;
+
+ clib_memset (gm, 0, sizeof (gm[0]));
+ gm->vlib_main = vm;
+ gm->vnet_main = vnet_get_main ();
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (gso_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef included_gso_h
+#define included_gso_h
+
+#include <vnet/vnet.h>
+
+typedef struct
+{
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+ u16 msg_id_base;
+} gso_main_t;
+
+extern gso_main_t gso_main;
+
+int vnet_sw_interface_gso_enable_disable (u32 sw_if_index, u8 enable);
+
+#endif /* included_gso_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * gso_api.c - Generic Segmentation Offload api
+ *
+ * Copyright (c) 2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <vnet/vnet.h>
+#include <vlibmemory/api.h>
+#include <vnet/gso/gso.h>
+
+#include <vnet/vnet_msg_enum.h>
+
+#define vl_typedefs /* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun /* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vnet/vnet_all_api_h.h>
+#undef vl_printfun
+
+#include <vlibapi/api_helper_macros.h>
+
+#define foreach_feature_gso_api_msg \
+_(FEATURE_GSO_ENABLE_DISABLE, feature_gso_enable_disable)
+
+static void
+ vl_api_feature_gso_enable_disable_t_handler
+ (vl_api_feature_gso_enable_disable_t * mp)
+{
+ vl_api_feature_gso_enable_disable_reply_t *rmp;
+ int rv = 0;
+
+ VALIDATE_SW_IF_INDEX (mp);
+
+ rv =
+ vnet_sw_interface_gso_enable_disable (ntohl (mp->sw_if_index),
+ mp->enable_disable);
+
+ BAD_SW_IF_INDEX_LABEL;
+
+ REPLY_MACRO (VL_API_FEATURE_GSO_ENABLE_DISABLE_REPLY);
+}
+
+#define vl_msg_name_crc_list
+#include <vnet/gso/gso.api.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (api_main_t * am)
+{
+#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
+ foreach_vl_msg_name_crc_gso;
+#undef _
+}
+
+static clib_error_t *
+feature_gso_api_hookup (vlib_main_t * vm)
+{
+ api_main_t *am = &api_main;
+
+#define _(N,n) \
+ vl_msg_api_set_handlers(VL_API_##N, #n, \
+ vl_api_##n##_t_handler, \
+ vl_noop_handler, \
+ vl_api_##n##_t_endian, \
+ vl_api_##n##_t_print, \
+ sizeof(vl_api_##n##_t), 1);
+ foreach_feature_gso_api_msg;
+#undef _
+
+ /*
+ * Set up the (msg_name, crc, message-id) table
+ */
+ setup_message_id_table (am);
+
+ return 0;
+}
+
+VLIB_API_INIT_FUNCTION (feature_gso_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vppinfra/error.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/feature/feature.h>
+#include <vnet/gso/gso.h>
+#include <vnet/ip/icmp46_packet.h>
+#include <vnet/ip/ip4.h>
+#include <vnet/ip/ip6.h>
+#include <vnet/udp/udp_packet.h>
+
+typedef struct
+{
+ u32 flags;
+ u16 gso_size;
+ u8 gso_l4_hdr_sz;
+} gso_trace_t;
+
+static u8 *
+format_gso_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 *);
+ gso_trace_t *t = va_arg (*args, gso_trace_t *);
+
+ if (t->flags & VNET_BUFFER_F_GSO)
+ {
+ s = format (s, "gso_sz %d gso_l4_hdr_sz %d",
+ t->gso_size, t->gso_l4_hdr_sz);
+ }
+
+ return s;
+}
+
+static_always_inline u16
+tso_alloc_tx_bufs (vlib_main_t * vm,
+ vnet_interface_per_thread_data_t * ptd,
+ vlib_buffer_t * b0, u32 n_bytes_b0, u16 l234_sz,
+ u16 gso_size)
+{
+ u16 size =
+ clib_min (gso_size, vlib_buffer_get_default_data_size (vm) - l234_sz);
+
+ /* rounded-up division */
+ u16 n_bufs = (n_bytes_b0 - l234_sz + (size - 1)) / 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 n_alloc;
+}
+
+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 = b0->current_data;
+ 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 (vlib_buffer_get_current (nb0),
+ vlib_buffer_get_current (b0), length);
+ nb0->current_length = length;
+}
+
+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);
+
+ *p_dst_left =
+ clib_min (gso_size,
+ vlib_buffer_get_default_data_size (vm) - (template_data_sz +
+ nb0->current_data));
+ *p_dst_ptr = vlib_buffer_get_current (nb0) + template_data_sz;
+
+ 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);
+}
+
+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 -
+ (l4_hdr_offset - b0->current_data));
+ else
+ ip4->length =
+ clib_host_to_net_u16 (b0->current_length -
+ (l3_hdr_offset - b0->current_data));
+}
+
+/**
+ * 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.
+ */
+
+static_always_inline u32
+tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
+ u32 sbi0, vlib_buffer_t * sb0, u32 n_bytes_b0, int is_ip6)
+{
+ u32 n_tx_bytes = 0;
+ 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
+ - sb0->current_data;
+ 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, n_bytes_b0, l234_sz, gso_size)))
+ return 0;
+
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
+ tso_init_buf_from_template_base (b0, sb0, default_bflags,
+ l234_sz + first_data_size);
+
+ u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
+ if (total_src_left)
+ {
+ /* 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 = vlib_buffer_get_current (sb0) + l234_sz + first_data_size;
+ src_left = sb0->current_length - l234_sz - first_data_size;
+
+ tso_fixup_segmented_buf (b0, tcp_flags_no_fin_psh, is_ip6);
+
+ /* 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)
+ {
+ if (nloops-- <= 0)
+ clib_panic ("infinite loop detected");
+ u16 bytes_to_copy = clib_min (src_left, dst_left);
+
+ clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
+
+ 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 (0 == src_left)
+ {
+ int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
+ u32 next_bi = csb0->next_buffer;
+
+ /* init src to the next buffer in chain */
+ if (has_next)
+ {
+ csbi0 = next_bi;
+ csb0 = vlib_get_buffer (vm, csbi0);
+ src_left = csb0->current_length;
+ src_ptr = vlib_buffer_get_current (csb0);
+ }
+ else
+ {
+ ASSERT (total_src_left == 0);
+ break;
+ }
+ }
+ if (0 == dst_left && total_src_left)
+ {
+ 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);
+ }
+ }
+
+ tso_fixup_segmented_buf (cdb0, save_tcp_flags, is_ip6);
+
+ n_tx_bytes += cdb0->current_length;
+ }
+ n_tx_bytes += b0->current_length;
+ return n_tx_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 sw_if_index, u32 drop_error_code)
+{
+ u32 thread_index = vm->thread_index;
+
+ 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, 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);
+}
+
+static_always_inline uword
+vnet_gso_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 is_ip6, int do_segmentation)
+{
+ u32 *to_next;
+ u32 next_index = node->cached_next_index;
+ u32 *from = vlib_frame_vector_args (frame);
+ u32 n_left_from = frame->n_vectors;
+ u32 *from_end = from + n_left_from;
+ u32 thread_index = vm->thread_index;
+ vnet_interface_main_t *im = &vnm->interface_main;
+ vnet_interface_per_thread_data_t *ptd =
+ vec_elt_at_index (im->per_thread_data, thread_index);
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+
+ vlib_get_buffers (vm, from, b, n_left_from);
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (from + 8 <= from_end && n_left_to_next >= 4)
+ {
+ u32 bi0, bi1, bi2, bi3;
+ u32 next0, next1, next2, next3;
+ u32 swif0, swif1, swif2, swif3;
+ gso_trace_t *t0, *t1, *t2, *t3;
+ vnet_hw_interface_t *hi0, *hi1, *hi2, *hi3;
+
+ /* Prefetch next iteration. */
+ vlib_prefetch_buffer_header (b[4], LOAD);
+ vlib_prefetch_buffer_header (b[5], LOAD);
+ vlib_prefetch_buffer_header (b[6], LOAD);
+ vlib_prefetch_buffer_header (b[7], LOAD);
+
+ bi0 = from[0];
+ bi1 = from[1];
+ bi2 = from[2];
+ bi3 = from[3];
+ to_next[0] = bi0;
+ to_next[1] = bi1;
+ to_next[2] = bi2;
+ to_next[3] = bi3;
+
+ swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
+ swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
+ swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
+ swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
+
+ if (PREDICT_FALSE (hi->sw_if_index != swif0))
+ {
+ hi0 = vnet_get_sup_hw_interface (vnm, swif0);
+ if ((hi0->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
+ (b[0]->flags & VNET_BUFFER_F_GSO))
+ break;
+ }
+ if (PREDICT_FALSE (hi->sw_if_index != swif1))
+ {
+ hi1 = vnet_get_sup_hw_interface (vnm, swif0);
+ if (!(hi1->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) &&
+ (b[1]->flags & VNET_BUFFER_F_GSO))
+ break;
+ }
+ if (PREDICT_FALSE (hi->sw_if_index != swif2))
+ {
+ hi2 = vnet_get_sup_hw_interface (vnm, swif0);
+ if ((hi2->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
+ (b[2]->flags & VNET_BUFFER_F_GSO))
+ break;
+ }
+ if (PREDICT_FALSE (hi->sw_if_index != swif3))
+ {
+ hi3 = vnet_get_sup_hw_interface (vnm, swif0);
+ if (!(hi3->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) &&
+ (b[3]->flags & VNET_BUFFER_F_GSO))
+ break;
+ }
+
+ if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
+ t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
+ t0->gso_size = vnet_buffer2 (b[0])->gso_size;
+ t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
+ }
+ if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ t1 = vlib_add_trace (vm, node, b[1], sizeof (t1[0]));
+ t1->flags = b[1]->flags & VNET_BUFFER_F_GSO;
+ t1->gso_size = vnet_buffer2 (b[1])->gso_size;
+ t1->gso_l4_hdr_sz = vnet_buffer2 (b[1])->gso_l4_hdr_sz;
+ }
+ if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ t2 = vlib_add_trace (vm, node, b[2], sizeof (t2[0]));
+ t2->flags = b[2]->flags & VNET_BUFFER_F_GSO;
+ t2->gso_size = vnet_buffer2 (b[2])->gso_size;
+ t2->gso_l4_hdr_sz = vnet_buffer2 (b[2])->gso_l4_hdr_sz;
+ }
+ if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ t3 = vlib_add_trace (vm, node, b[3], sizeof (t3[0]));
+ t3->flags = b[3]->flags & VNET_BUFFER_F_GSO;
+ t3->gso_size = vnet_buffer2 (b[3])->gso_size;
+ t3->gso_l4_hdr_sz = vnet_buffer2 (b[3])->gso_l4_hdr_sz;
+ }
+
+ from += 4;
+ to_next += 4;
+ n_left_to_next -= 4;
+ n_left_from -= 4;
+
+ next0 = next1 = 0;
+ next2 = next3 = 0;
+ vnet_feature_next (&next0, b[0]);
+ vnet_feature_next (&next1, b[1]);
+ vnet_feature_next (&next2, b[2]);
+ vnet_feature_next (&next3, b[3]);
+ vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, bi1, bi2, bi3,
+ next0, next1, next2, next3);
+ b += 4;
+ }
+
+ while (from + 1 <= from_end && n_left_to_next > 0)
+ {
+ u32 bi0, swif0;
+ gso_trace_t *t0;
+ vnet_hw_interface_t *hi0;
+ u32 next0 = 0;
+
+ swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
+ if (PREDICT_FALSE (hi->sw_if_index != swif0))
+ {
+ hi0 = vnet_get_sup_hw_interface (vnm, swif0);
+ if ((hi0->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
+ (b[0]->flags & VNET_BUFFER_F_GSO))
+ do_segmentation = 1;
+ }
+
+ /* speculatively enqueue b0 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next += 1;
+ n_left_to_next -= 1;
+ from += 1;
+ n_left_from -= 1;
+
+ if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
+ t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
+ t0->gso_size = vnet_buffer2 (b[0])->gso_size;
+ t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
+ }
+
+ if (do_segmentation)
+ {
+ if (PREDICT_FALSE (b[0]->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_next -= 1;
+ n_left_to_next += 1;
+ /* undo the counting. */
+ u32 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
+ u32 n_tx_bytes = 0;
+
+ n_tx_bytes =
+ tso_segment_buffer (vm, ptd, bi0, b[0], n_bytes_b0,
+ is_ip6);
+
+ if (PREDICT_FALSE (n_tx_bytes == 0))
+ {
+ drop_one_buffer_and_count (vm, vnm, node, from - 1,
+ hi->sw_if_index,
+ VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO);
+ b += 1;
+ continue;
+ }
+
+ u16 n_tx_bufs = vec_len (ptd->split_buffers);
+ u32 *from_seg = ptd->split_buffers;
+
+ while (n_tx_bufs > 0)
+ {
+ u32 sbi0;
+ vlib_buffer_t *sb0;
+ if (n_tx_bufs >= n_left_to_next)
+ {
+ while (n_left_to_next > 0)
+ {
+ sbi0 = to_next[0] = from_seg[0];
+ sb0 = vlib_get_buffer (vm, sbi0);
+ to_next += 1;
+ from_seg += 1;
+ n_left_to_next -= 1;
+ n_tx_bufs -= 1;
+ vnet_feature_next (&next0, sb0);
+ vlib_validate_buffer_enqueue_x1 (vm, node,
+ next_index,
+ to_next,
+ n_left_to_next,
+ sbi0, next0);
+ }
+ vlib_put_next_frame (vm, node, next_index,
+ n_left_to_next);
+ vlib_get_new_next_frame (vm, node, next_index,
+ to_next, n_left_to_next);
+ }
+ while (n_tx_bufs > 0)
+ {
+ sbi0 = to_next[0] = from_seg[0];
+ sb0 = vlib_get_buffer (vm, sbi0);
+ to_next += 1;
+ from_seg += 1;
+ n_left_to_next -= 1;
+ n_tx_bufs -= 1;
+ vnet_feature_next (&next0, sb0);
+ vlib_validate_buffer_enqueue_x1 (vm, node,
+ next_index,
+ to_next,
+ n_left_to_next,
+ sbi0, next0);
+ }
+ }
+ /* The buffers were enqueued. Reset the length */
+ _vec_len (ptd->split_buffers) = 0;
+ /* Free the now segmented buffer */
+ vlib_buffer_free_one (vm, bi0);
+ b += 1;
+ continue;
+ }
+ }
+
+ vnet_feature_next (&next0, b[0]);
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ b += 1;
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return frame->n_vectors;
+}
+
+static_always_inline uword
+vnet_gso_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame, int is_ip6)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_hw_interface_t *hi;
+
+ if (frame->n_vectors > 0)
+ {
+ u32 *from = vlib_frame_vector_args (frame);
+ vlib_buffer_t *b = vlib_get_buffer (vm, from[0]);
+ hi = vnet_get_sup_hw_interface (vnm,
+ vnet_buffer (b)->sw_if_index[VLIB_TX]);
+ /*
+ * 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 (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
+ return vnet_gso_node_inline (vm, node, frame, vnm, hi,
+ is_ip6, /* do_segmentation */ 0);
+ else
+ return vnet_gso_node_inline (vm, node, frame, vnm, hi,
+ is_ip6, /* do_segmentation */ 1);
+ }
+ return 0;
+}
+
+VLIB_NODE_FN (gso_l2_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return vnet_gso_inline (vm, node, frame, 0 /* ip6 */ );
+}
+
+VLIB_NODE_FN (gso_l2_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return vnet_gso_inline (vm, node, frame, 1 /* ip6 */ );
+}
+
+VLIB_NODE_FN (gso_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return vnet_gso_inline (vm, node, frame, 0 /* ip6 */ );
+}
+
+VLIB_NODE_FN (gso_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return vnet_gso_inline (vm, node, frame, 1 /* ip6 */ );
+}
+
+/* *INDENT-OFF* */
+
+VLIB_REGISTER_NODE (gso_l2_ip4_node) = {
+ .vector_size = sizeof (u32),
+ .format_trace = format_gso_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = 0,
+ .n_next_nodes = 0,
+ .name = "gso-l2-ip4",
+};
+
+VLIB_REGISTER_NODE (gso_l2_ip6_node) = {
+ .vector_size = sizeof (u32),
+ .format_trace = format_gso_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = 0,
+ .n_next_nodes = 0,
+ .name = "gso-l2-ip6",
+};
+
+VLIB_REGISTER_NODE (gso_ip4_node) = {
+ .vector_size = sizeof (u32),
+ .format_trace = format_gso_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = 0,
+ .n_next_nodes = 0,
+ .name = "gso-ip4",
+};
+
+VLIB_REGISTER_NODE (gso_ip6_node) = {
+ .vector_size = sizeof (u32),
+ .format_trace = format_gso_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = 0,
+ .n_next_nodes = 0,
+ .name = "gso-ip6",
+};
+
+VNET_FEATURE_INIT (gso_l2_ip4_node, static) = {
+ .arc_name = "l2-output-ip4",
+ .node_name = "gso-l2-ip4",
+ .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
+};
+
+VNET_FEATURE_INIT (gso_l2_ip6_node, static) = {
+ .arc_name = "l2-output-ip6",
+ .node_name = "gso-l2-ip6",
+ .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
+};
+
+VNET_FEATURE_INIT (gso_ip4_node, static) = {
+ .arc_name = "ip4-output",
+ .node_name = "gso-ip4",
+ .runs_after = VNET_FEATURES ("ipsec4-output-feature"),
+ .runs_before = VNET_FEATURES ("interface-output"),
+};
+
+VNET_FEATURE_INIT (gso_ip6_node, static) = {
+ .arc_name = "ip6-output",
+ .node_name = "gso-ip6",
+ .runs_after = VNET_FEATURES ("ipsec6-output-feature"),
+ .runs_before = VNET_FEATURES ("interface-output"),
+};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
{
u32 sw_if_index;
u32 flags;
- u16 gso_size;
- u8 gso_l4_hdr_sz;
- u8 data[128 - 3 * sizeof (u32)];
+ u8 data[128 - 2 * sizeof (u32)];
}
interface_output_trace_t;
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,
t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
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));
}
t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
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));
}
t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
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));
}
b->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
}
-static_always_inline u16
-tso_alloc_tx_bufs (vlib_main_t * vm,
- vnet_interface_per_thread_data_t * ptd,
- vlib_buffer_t * b0, u32 n_bytes_b0, u16 l234_sz,
- u16 gso_size)
-{
- u16 size =
- clib_min (gso_size, vlib_buffer_get_default_data_size (vm) - l234_sz);
-
- /* rounded-up division */
- u16 n_bufs = (n_bytes_b0 - l234_sz + (size - 1)) / 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 n_alloc;
-}
-
-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 = b0->current_data;
- 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 (vlib_buffer_get_current (nb0),
- vlib_buffer_get_current (b0), length);
- nb0->current_length = length;
-}
-
-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);
-
- *p_dst_left =
- clib_min (gso_size,
- vlib_buffer_get_default_data_size (vm) - (template_data_sz +
- nb0->current_data));
- *p_dst_ptr = vlib_buffer_get_current (nb0) + template_data_sz;
-
- 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);
-}
-
-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 -
- (l4_hdr_offset - b0->current_data));
- else
- ip4->length =
- clib_host_to_net_u16 (b0->current_length -
- (l3_hdr_offset - b0->current_data));
-}
-
-/**
- * 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.
- */
-
-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
- - sb0->current_data;
- 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, n_bytes_b0, l234_sz, gso_size)))
- return 0;
-
- vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
- tso_init_buf_from_template_base (b0, sb0, default_bflags,
- l234_sz + first_data_size);
-
- u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
- if (total_src_left)
- {
- /* 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 = vlib_buffer_get_current (sb0) + l234_sz + first_data_size;
- src_left = sb0->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)
- {
- if (nloops-- <= 0)
- clib_panic ("infinite loop detected");
- u16 bytes_to_copy = clib_min (src_left, dst_left);
-
- clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
-
- 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 (0 == src_left)
- {
- int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
- u32 next_bi = csb0->next_buffer;
-
- /* init src to the next buffer in chain */
- if (has_next)
- {
- csbi0 = next_bi;
- csb0 = vlib_get_buffer (vm, csbi0);
- src_left = csb0->current_length;
- src_ptr = vlib_buffer_get_current (csb0);
- }
- else
- {
- ASSERT (total_src_left == 0);
- break;
- }
- }
- if (0 == dst_left && total_src_left)
- {
- 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);
- }
- }
-
- tso_fixup_segmented_buf (cdb0, save_tcp_flags, is_ip6);
- if (do_tx_offloads)
- calc_checksums (vm, cdb0);
-
- n_tx_bytes += cdb0->current_length;
- }
- n_tx_bytes += b0->current_length;
- return n_tx_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;
-
- 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);
-}
-
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_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)
{
vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
vnet_sw_interface_t *si;
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);
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
n_buffers = frame->n_vectors;
or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
- if (do_segmentation)
- {
- /* 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;
b[0]->current_config_index = current_config_index;
}
- if (do_segmentation)
- {
- if (PREDICT_FALSE (b[0]->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, b[0],
- 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);
- b += 1;
- 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);
- }
- 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);
- b += 1;
- continue;
- }
- }
-
if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
{
}
if (do_tx_offloads)
- calc_checksums (vm, b[0]);
-
+ {
+ if (b[0]->flags &
+ (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
+ VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
+ VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
+ calc_checksums (vm, b[0]);
+ }
b += 1;
}
}
#ifndef CLIB_MARCH_VARIANT
-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,
#include <vnet/vxlan-gbp/vxlan_gbp.api.h>
#include <vnet/syslog/syslog.api.h>
#include <vnet/devices/virtio/virtio.api.h>
+#include <vnet/gso/gso.api.h>
/*
* fd.io coding-style-patch-verification: ON
FINISH;
}
+static void *vl_api_feature_gso_enable_disable_t_print
+ (vl_api_feature_gso_enable_disable_t * mp, void *handle)
+{
+ u8 *s;
+
+ s = format (0, "SCRIPT: feature_gso_enable_disable ");
+ s = format (s, "sw_if_index %d ", ntohl (mp->sw_if_index));
+ if (mp->enable_disable)
+ s = format (s, "enable");
+ if (!mp->enable_disable)
+ s = format (s, "disable");
+
+ FINISH;
+}
+
static void *vl_api_sw_interface_tag_add_del_t_print
(vl_api_sw_interface_tag_add_del_t * mp, void *handle)
{
_(IP_TABLE_DUMP, ip_table_dump) \
_(IP_ROUTE_DUMP, ip_route_dump) \
_(FEATURE_ENABLE_DISABLE, feature_enable_disable) \
+_(FEATURE_GSO_ENABLE_DISABLE, feature_gso_enable_disable) \
_(SW_INTERFACE_TAG_ADD_DEL, sw_interface_tag_add_del) \
_(HW_INTERFACE_SET_MTU, hw_interface_set_mtu) \
_(P2P_ETHERNET_ADD, p2p_ethernet_add) \
i.resolve_arp()
i.resolve_ndp()
+ self.vapi.feature_gso_enable_disable(self.pg4.sw_if_index)
p42 = (Ether(src=self.pg2.remote_mac, dst=self.pg2.local_mac) /
IP(src=self.pg2.remote_ip4, dst=self.pg4.remote_ip4,
flags='DF') /
i.resolve_ndp()
self.vapi.sw_interface_set_mtu(self.pg5.sw_if_index, [9000, 0, 0, 0])
+ self.vapi.feature_gso_enable_disable(self.pg1.sw_if_index)
p44 = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
IP(src=self.pg5.remote_ip4, dst=self.pg1.remote_ip4) /
TCP(sport=1234, dport=1234) /
'sw_if_index': sw_if_index,
'is_enable': is_enable,
})
+
+ def feature_gso_enable_disable(self, sw_if_index, enable_disable=1):
+ return self.api(self.papi.feature_gso_enable_disable,
+ {
+ 'sw_if_index': sw_if_index,
+ 'enable_disable': enable_disable,
+ })
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