#include <vnet/ip/ip6.h>
#include <vnet/udp/udp_packet.h>
#include <vnet/feature/feature.h>
+#include <vnet/classify/trace_classify.h>
typedef struct
{
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 + (gso_size - 1)) / gso_size;
+ u16 n_bufs = (n_bytes_b0 - l234_sz + (size - 1)) / size;
u16 n_alloc;
ASSERT (n_bufs > 0);
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 |
- VNET_SW_INTERFACE_FLAG_BOND_SLAVE)) ||
+ if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
!(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
{
vlib_simple_counter_main_t *cm;
{
u32 n_left_from, *from;
u32 sw_if_index;
+ vnet_pcap_t *pp = &vlib_global_main.pcap;
- if (PREDICT_TRUE (vlib_global_main.pcap[VLIB_TX].pcap_enable == 0))
+ if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
return;
if (sw_if_index_from_buffer == 0)
while (n_left_from > 0)
{
+ int classify_filter_result;
u32 bi0 = from[0];
vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+ from++;
+ n_left_from--;
+
+ if (pp->filter_classify_table_index != ~0)
+ {
+ classify_filter_result =
+ vnet_is_packet_traced_inline
+ (b0, pp->filter_classify_table_index, 0 /* full classify */ );
+ if (classify_filter_result)
+ pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
+ continue;
+ }
if (sw_if_index_from_buffer)
sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
- if (vlib_global_main.pcap[VLIB_TX].pcap_sw_if_index == 0 ||
- vlib_global_main.pcap[VLIB_TX].pcap_sw_if_index == sw_if_index)
- pcap_add_buffer (&vlib_global_main.pcap[VLIB_TX].pcap_main, vm, bi0,
- 512);
- from++;
- n_left_from--;
+ if (pp->pcap_sw_if_index == 0 || pp->pcap_sw_if_index == sw_if_index)
+ pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
}
}
static inline void
pcap_drop_trace (vlib_main_t * vm,
- vnet_interface_main_t * im, vlib_frame_t * f)
+ vnet_interface_main_t * im,
+ vnet_pcap_t * pp, vlib_frame_t * f)
{
u32 *from;
u32 n_left = f->n_vectors;
u32 bi0;
i16 save_current_data;
u16 save_current_length;
+ vlib_error_main_t *em = &vm->error_main;
+ int do_trace = 0;
+
from = vlib_frame_vector_args (f);
&& hash_get (im->pcap_drop_filter_hash, b0->error))
continue;
+ do_trace = (pp->pcap_sw_if_index == 0) ||
+ pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ if (PREDICT_FALSE
+ (do_trace == 0 && pp->filter_classify_table_index != ~0))
+ {
+ do_trace = vnet_is_packet_traced_inline
+ (b0, pp->filter_classify_table_index, 0 /* full classify */ );
+ }
+
/* Trace all drops, or drops received on a specific interface */
- if (im->pcap_sw_if_index == 0 ||
- im->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX])
+ if (do_trace)
{
save_current_data = b0->current_data;
save_current_length = b0->current_length;
/*
* Typically, we'll need to rewind the buffer
+ * if l2_hdr_offset is valid, make sure to rewind to the start of
+ * the L2 header. This may not be the buffer start in case we pop-ed
+ * vlan tags.
+ * Otherwise, rewind to buffer start and hope for the best.
*/
- if (b0->current_data > 0)
+ if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
+ {
+ if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
+ vlib_buffer_advance (b0,
+ vnet_buffer (b0)->l2_hdr_offset -
+ b0->current_data);
+ }
+ else if (b0->current_data > 0)
vlib_buffer_advance (b0, (word) - b0->current_data);
- pcap_add_buffer (&im->pcap_main, vm, bi0, 512);
+ {
+ vlib_buffer_t *last = b0;
+ u32 error_node_index;
+ int drop_string_len;
+ vlib_node_t *n;
+ /* Length of the error string */
+ int error_string_len =
+ clib_strnlen (em->error_strings_heap[b0->error], 128);
+
+ /* Dig up the drop node */
+ error_node_index = vm->node_main.node_by_error[b0->error];
+ n = vlib_get_node (vm, error_node_index);
+
+ /* Length of full drop string, w/ "nodename: " prepended */
+ drop_string_len = error_string_len + vec_len (n->name) + 2;
+
+ /* Find the last buffer in the chain */
+ while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
+ last = vlib_get_buffer (vm, last->next_buffer);
+
+ /*
+ * Append <nodename>: <error-string> to the capture,
+ * only if we can do that without allocating a new buffer.
+ */
+ if (PREDICT_TRUE ((last->current_data + last->current_length)
+ < (VLIB_BUFFER_DEFAULT_DATA_SIZE
+ - drop_string_len)))
+ {
+ clib_memcpy_fast (last->data + last->current_data +
+ last->current_length, n->name,
+ vec_len (n->name));
+ clib_memcpy_fast (last->data + last->current_data +
+ last->current_length + vec_len (n->name),
+ ": ", 2);
+ clib_memcpy_fast (last->data + last->current_data +
+ last->current_length + vec_len (n->name) +
+ 2, em->error_strings_heap[b0->error],
+ error_string_len);
+ last->current_length += drop_string_len;
+ b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
+ pcap_add_buffer (&pp->pcap_main, vm, bi0,
+ pp->max_bytes_per_pkt);
+ last->current_length -= drop_string_len;
+ b0->current_data = save_current_data;
+ b0->current_length = save_current_length;
+ continue;
+ }
+ }
+
+ /*
+ * Didn't have space in the last buffer, here's the dropped
+ * packet as-is
+ */
+ pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
b0->current_data = save_current_data;
b0->current_length = save_current_length;
vlib_frame_t * frame)
{
vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
+ vnet_pcap_t *pp = &vlib_global_main.pcap;
- if (PREDICT_FALSE (im->drop_pcap_enable))
- pcap_drop_trace (vm, im, frame);
+ if (PREDICT_FALSE (pp->pcap_drop_enable))
+ pcap_drop_trace (vm, im, pp, frame);
return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
}
}
/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (interface_tx, static) = {
+VLIB_REGISTER_NODE (interface_tx) = {
.function = interface_tx_node_fn,
.name = "interface-tx",
.vector_size = sizeof (u32),
}
#endif /* CLIB_MARCH_VARIANT */
-static clib_error_t *
-pcap_drop_trace_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- vnet_main_t *vnm = vnet_get_main ();
- vnet_interface_main_t *im = &vnm->interface_main;
- u8 *filename;
- u32 max;
- int matched = 0;
- clib_error_t *error = 0;
-
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (input, "on"))
- {
- if (im->drop_pcap_enable == 0)
- {
- if (im->pcap_filename == 0)
- im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0);
-
- 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 = PCAP_DEF_PKT_TO_CAPTURE;
- if (im->pcap_pkts_to_capture)
- im->pcap_main.n_packets_to_capture = im->pcap_pkts_to_capture;
-
- im->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
- im->drop_pcap_enable = 1;
- matched = 1;
- vlib_cli_output (vm, "pcap drop capture on...");
- }
- else
- {
- vlib_cli_output (vm, "pcap drop capture already on...");
- }
- matched = 1;
- }
- else if (unformat (input, "off"))
- {
- matched = 1;
-
- if (im->drop_pcap_enable)
- {
- vlib_cli_output (vm, "captured %d pkts...",
- im->pcap_main.n_packets_captured);
- if (im->pcap_main.n_packets_captured)
- {
- im->pcap_main.n_packets_to_capture =
- im->pcap_main.n_packets_captured;
- error = pcap_write (&im->pcap_main);
- if (error)
- clib_error_report (error);
- else
- vlib_cli_output (vm, "saved to %s...", im->pcap_filename);
- }
- }
- else
- {
- vlib_cli_output (vm, "pcap drop capture already off...");
- }
-
- im->drop_pcap_enable = 0;
- }
- else if (unformat (input, "max %d", &max))
- {
- im->pcap_pkts_to_capture = max;
- matched = 1;
- }
-
- else if (unformat (input, "intfc %U",
- unformat_vnet_sw_interface, vnm,
- &im->pcap_sw_if_index))
- matched = 1;
- else if (unformat (input, "intfc any"))
- {
- im->pcap_sw_if_index = 0;
- matched = 1;
- }
- else if (unformat (input, "file %s", &filename))
- {
- u8 *chroot_filename;
- /* Brain-police user path input */
- if (strstr ((char *) filename, "..")
- || index ((char *) filename, '/'))
- {
- vlib_cli_output (vm, "illegal characters in filename '%s'",
- filename);
- continue;
- }
-
- chroot_filename = format (0, "/tmp/%s%c", filename, 0);
- vec_free (filename);
-
- if (im->pcap_filename)
- vec_free (im->pcap_filename);
- im->pcap_filename = chroot_filename;
- im->pcap_main.file_name = (char *) im->pcap_filename;
- matched = 1;
- }
- else if (unformat (input, "status"))
- {
- if (im->drop_pcap_enable == 0)
- {
- vlib_cli_output (vm, "pcap drop capture is off...");
- continue;
- }
-
- vlib_cli_output (vm, "pcap drop capture: %d of %d pkts...",
- im->pcap_main.n_packets_captured,
- im->pcap_main.n_packets_to_capture);
- matched = 1;
- }
-
- else
- break;
- }
-
- if (matched == 0)
- return clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
-
- return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (pcap_trace_command, static) = {
- .path = "pcap drop trace",
- .short_help =
- "pcap drop trace on off max <nn> intfc <intfc> file <name> status",
- .function = pcap_drop_trace_command_fn,
-};
-/* *INDENT-ON* */
-
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff