/**< Only valid for first buffer in chain. Current length plus
total length given here give total number of bytes in buffer chain.
*/
- u32 opaque2[13]; /**< More opaque data, currently unused */
+ u32 align_pad; /**< available */
+ u32 opaque2[12]; /**< More opaque data, see ../vnet/vnet/buffer.h */
/***** end of second cache line */
CLIB_CACHE_LINE_ALIGN_MARK (cacheline2);
#define VLIB_BUFFER_TRACE_TRAJECTORY 0
#if VLIB_BUFFER_TRACE_TRAJECTORY > 0
-#define VLIB_BUFFER_TRACE_TRAJECTORY_INIT(b) (b)->pre_data[0]=0
+extern void (*vlib_buffer_trace_trajectory_cb) (vlib_buffer_t * b, u32 index);
+extern void (*vlib_buffer_trace_trajectory_init_cb) (vlib_buffer_t * b);
+extern void vlib_buffer_trace_trajectory_init (vlib_buffer_t * b);
+#define VLIB_BUFFER_TRACE_TRAJECTORY_INIT(b) \
+ vlib_buffer_trace_trajectory_init (b);
#else
#define VLIB_BUFFER_TRACE_TRAJECTORY_INIT(b)
#endif /* VLIB_BUFFER_TRACE_TRAJECTORY */
/* data to log */ n_vectors);
}
+#if VLIB_BUFFER_TRACE_TRAJECTORY > 0
+void (*vlib_buffer_trace_trajectory_cb) (vlib_buffer_t * b, u32 node_index);
+void (*vlib_buffer_trace_trajectory_init_cb) (vlib_buffer_t * b);
+
void
-vlib_dump_context_trace (vlib_main_t * vm, u32 bi)
+vlib_buffer_trace_trajectory_init (vlib_buffer_t * b)
{
- vlib_node_main_t *vnm = &vm->node_main;
- vlib_buffer_t *b;
- u8 i, n;
-
- if (VLIB_BUFFER_TRACE_TRAJECTORY)
+ if (PREDICT_TRUE (vlib_buffer_trace_trajectory_init_cb != 0))
{
- b = vlib_get_buffer (vm, bi);
- n = b->pre_data[0];
-
- fformat (stderr, "Context trace for bi %d b 0x%llx, visited %d\n",
- bi, b, n);
-
- if (n == 0 || n > 20)
- {
- fformat (stderr, "n is unreasonable\n");
- return;
- }
-
-
- for (i = 0; i < n; i++)
- {
- u32 node_index;
-
- node_index = b->pre_data[i + 1];
+ (*vlib_buffer_trace_trajectory_init_cb) (b);
+ }
+}
- if (node_index > vec_len (vnm->nodes))
- {
- fformat (stderr, "Skip bogus node index %d\n", node_index);
- continue;
- }
+#endif
- fformat (stderr, "%v (%d)\n", vnm->nodes[node_index]->name,
- node_index);
- }
- }
- else
+static inline void
+add_trajectory_trace (vlib_buffer_t * b, u32 node_index)
+{
+#if VLIB_BUFFER_TRACE_TRAJECTORY > 0
+ if (PREDICT_TRUE (vlib_buffer_trace_trajectory_cb != 0))
{
- fformat (stderr,
- "in vlib/buffers.h, #define VLIB_BUFFER_TRACE_TRAJECTORY 1\n");
+ (*vlib_buffer_trace_trajectory_cb) (b, node_index);
}
+#endif
}
-
static_always_inline u64
dispatch_node (vlib_main_t * vm,
vlib_node_runtime_t * node,
if (VLIB_BUFFER_TRACE_TRAJECTORY && frame)
{
int i;
- int log_index;
u32 *from;
from = vlib_frame_vector_args (frame);
for (i = 0; i < frame->n_vectors; i++)
{
vlib_buffer_t *b = vlib_get_buffer (vm, from[i]);
- ASSERT (b->pre_data[0] < 32);
- log_index = b->pre_data[0]++ + 1;
- b->pre_data[log_index] = node->node_index;
+ add_trajectory_trace (b, node->node_index);
}
n = node->function (vm, node, frame);
}
########################################
libvnet_la_SOURCES += \
- vnet/util/radix.c
+ vnet/util/radix.c \
+ vnet/util/trajectory.c
########################################
# Plugin client library
{
union
{
+#if VLIB_BUFFER_TRACE_TRAJECTORY > 0
+ /* buffer trajectory tracing */
+ struct
+ {
+ u16 *trajectory_trace;
+ };
+#endif
+ u32 unused[12];
};
} vnet_buffer_opaque2_t;
+#define vnet_buffer2(b) ((vnet_buffer_opaque2_t *) (b)->opaque2)
+
+/*
+ * The opaque2 field of the vlib_buffer_t is intepreted as a
+ * vnet_buffer_opaque2_t. Hence it should be big enough to accommodate one.
+ */
+STATIC_ASSERT (sizeof (vnet_buffer_opaque2_t) <=
+ STRUCT_SIZE_OF (vlib_buffer_t, opaque2),
+ "VNET buffer opaque2 meta-data too large for vlib_buffer");
#endif /* included_vnet_buffer_h */
vnet_interface_main_t *im = &vnm->interface_main;
vlib_buffer_t *b = 0;
vnet_buffer_opaque_t *o = 0;
+ clib_error_t *error;
/*
* Keep people from shooting themselves in the foot.
}
}
- {
- clib_error_t *error;
+ if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
+ return error;
- if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
- return error;
+ vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
+#if VLIB_BUFFER_TRACE_TRAJECTORY > 0
+ if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
return error;
- }
- vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
+#endif
+
+ return 0;
}
VLIB_INIT_FUNCTION (vnet_interface_init);
vlib_cli_command_t * cmd)
{
vlib_cli_output (vm, "vl(p) returns vec_len(p)");
+ vlib_cli_output (vm, "vb(b) returns vnet_buffer(b) [opaque]");
+ vlib_cli_output (vm, "vb2(b) returns vnet_buffer2(b) [opaque2]");
vlib_cli_output (vm, "pe(p) returns pool_elts(p)");
vlib_cli_output (vm, "pifi(p, i) returns pool_is_free_index(p, i)");
vlib_cli_output (vm, "gdb_show_errors(0|1) dumps error counters");
return rv;
}
+vnet_buffer_opaque2_t *vb2 (void *vb_arg)
+{
+ vlib_buffer_t *b = (vlib_buffer_t *)vb_arg;
+ vnet_buffer_opaque2_t *rv;
+
+ rv = vnet_buffer2(b);
+
+ return rv;
+}
+
+
/* Cafeteria plan, maybe you don't want these functions */
clib_error_t *
gdb_func_init (vlib_main_t * vm) { return 0; }
--- /dev/null
+/*
+ * Copyright (c) 2017 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.
+ */
+
+/** \file
+ * Buffer trace trajectory utilities
+ */
+
+#include <vnet/vnet.h>
+
+/**
+ * Dump a trajectory trace, reasonably easy to call from gdb
+ */
+void
+vnet_dump_trajectory_trace (vlib_main_t * vm, u32 bi)
+{
+#if VLIB_BUFFER_TRACE_TRAJECTORY > 0
+ vlib_node_main_t *vnm = &vm->node_main;
+ vlib_buffer_t *b;
+ u16 *trace;
+ u8 i;
+
+ b = vlib_get_buffer (vm, bi);
+
+ trace = vnet_buffer2 (b)->trajectory_trace;
+
+ fformat (stderr, "Context trace for bi %d b 0x%llx, visited %d\n",
+ bi, b, vec_len (trace));
+
+ for (i = 0; i < vec_len (trace); i++)
+ {
+ u32 node_index;
+
+ node_index = trace[i];
+
+ if (node_index > vec_len (vnm->nodes))
+ {
+ fformat (stderr, "Skip bogus node index %d\n", node_index);
+ continue;
+ }
+
+ fformat (stderr, "%v (%d)\n", vnm->nodes[node_index]->name, node_index);
+ }
+#else
+ fformat (stderr, "in vlib/buffers.h, "
+ "#define VLIB_BUFFER_TRACE_TRAJECTORY 1\n");
+
+#endif
+}
+
+#if VLIB_BUFFER_TRACE_TRAJECTORY > 0
+
+void
+init_trajectory_trace (vlib_buffer_t * b)
+{
+ vec_validate (vnet_buffer2 (b)->trajectory_trace, 7);
+ _vec_len (vnet_buffer2 (b)->trajectory_trace) = 0;
+}
+
+void
+add_trajectory_trace (vlib_buffer_t * b, u32 node_index)
+{
+ vec_add1 (vnet_buffer2 (b)->trajectory_trace, (u16) node_index);
+}
+
+static clib_error_t *
+trajectory_trace_init (vlib_main_t * vm)
+{
+ vlib_buffer_trace_trajectory_cb = add_trajectory_trace;
+ vlib_buffer_trace_trajectory_init_cb = init_trajectory_trace;
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (trajectory_trace_init);
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / commitdiff