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/*
* Copyright (c) 2016 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 <vppinfra/serialize.h>
/* serialized representation of state strings */
#define foreach_state_string_code \
_(STATE_DONE, "done") \
_(STATE_DISABLED, "disabled") \
_(STATE_TIME_WAIT, "time wait") \
_(STATE_EVENT_WAIT, "event wait") \
_(STATE_ANY_WAIT, "any wait") \
_(STATE_POLLING, "polling") \
_(STATE_INTERRUPT_WAIT, "interrupt wait") \
_(STATE_INTERNAL, "internal")
typedef enum
{
#define _(a,b) a,
foreach_state_string_code
#undef _
} state_string_enum_t;
static char *state_strings[] = {
#define _(a,b) b,
foreach_state_string_code
#undef _
};
/*
* Serialize a vlib_node_main_t. Appends the result to vector.
* Pass 0 to create a new vector, use vec_reset_length(vector)
* to recycle a vector / avoid memory allocation, etc.
* Switch heaps before/after to serialize into API client shared memory.
*/
u8 *
vlib_node_serialize (vlib_main_t * vm, vlib_node_t *** node_dups, u8 * vector,
int include_nexts, int include_stats)
{
serialize_main_t _sm, *sm = &_sm;
vlib_node_t *n;
vlib_node_t **nodes;
u8 *namep;
u32 name_bytes;
uword i, j, k;
u64 l, v, c, d;
state_string_enum_t state_code;
serialize_open_vector (sm, vector);
serialize_likely_small_unsigned_integer (sm, vec_len (node_dups));
for (j = 0; j < vec_len (node_dups); j++)
{
nodes = node_dups[j];
serialize_likely_small_unsigned_integer (sm, vec_len (nodes));
for (i = 0; i < vec_len (nodes); i++)
{
n = nodes[i];
l = n->stats_total.clocks - n->stats_last_clear.clocks;
v = n->stats_total.vectors - n->stats_last_clear.vectors;
c = n->stats_total.calls - n->stats_last_clear.calls;
d = n->stats_total.suspends - n->stats_last_clear.suspends;
state_code = STATE_INTERNAL;
if (n->type == VLIB_NODE_TYPE_PROCESS)
{
vlib_process_t *p = vlib_get_process_from_node (vm, n);
switch (p->flags
& (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
| VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT))
{
default:
if (!(p->flags & VLIB_PROCESS_IS_RUNNING))
state_code = STATE_DONE;
break;
case VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK:
state_code = STATE_TIME_WAIT;
break;
case VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT:
state_code = STATE_EVENT_WAIT;
break;
case (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK):
state_code =
STATE_ANY_WAIT;
break;
}
}
else if (n->type != VLIB_NODE_TYPE_INTERNAL)
{
state_code = STATE_POLLING;
if (n->state == VLIB_NODE_STATE_DISABLED)
state_code = STATE_DISABLED;
else if (n->state == VLIB_NODE_STATE_INTERRUPT)
state_code = STATE_INTERRUPT_WAIT;
}
/* See unserialize_cstring */
name_bytes = vec_len (n->name);
serialize_likely_small_unsigned_integer (sm, name_bytes);
namep = serialize_get (sm, name_bytes);
memcpy (namep, n->name, name_bytes);
serialize_likely_small_unsigned_integer (sm, (u64) state_code);
serialize_likely_small_unsigned_integer (sm, n->type);
serialize_likely_small_unsigned_integer (sm, n->flags);
if (include_nexts)
{
serialize_likely_small_unsigned_integer
(sm, vec_len (n->next_nodes));
for (k = 0; k < vec_len (n->next_nodes); k++)
serialize_likely_small_unsigned_integer (sm,
n->next_nodes[k]);
}
else
serialize_likely_small_unsigned_integer (sm, 0);
if (include_stats)
{
/* stats present */
serialize_likely_small_unsigned_integer (sm, 1);
/* total clocks */
serialize_integer (sm, l, 8);
/* Total calls */
serialize_integer (sm, c, 8);
/* Total vectors */
serialize_integer (sm, v, 8);
/* Total suspends */
serialize_integer (sm, d, 8);
}
else /* no stats */
serialize_likely_small_unsigned_integer (sm, 0);
}
}
return (serialize_close_vector (sm));
}
vlib_node_t ***
vlib_node_unserialize (u8 * vector)
{
serialize_main_t _sm, *sm = &_sm;
u32 nnodes, nnexts;
u32 nstat_vms;
vlib_node_t *node;
vlib_node_t **nodes;
vlib_node_t ***nodes_by_thread = 0;
int i, j, k;
u64 l, v, c, d;
state_string_enum_t state_code;
int stats_present;
serialize_open_vector (sm, vector);
nstat_vms = unserialize_likely_small_unsigned_integer (sm);
vec_validate (nodes_by_thread, nstat_vms - 1);
_vec_len (nodes_by_thread) = 0;
for (i = 0; i < nstat_vms; i++)
{
nnodes = unserialize_likely_small_unsigned_integer (sm);
nodes = 0;
vec_validate (nodes, nnodes - 1);
vec_add1 (nodes_by_thread, nodes);
for (j = 0; j < nnodes; j++)
{
node = 0;
vec_validate (node, 0);
nodes[j] = node;
unserialize_cstring (sm, (char **) &(node->name));
state_code = unserialize_likely_small_unsigned_integer (sm);
node->state_string = (u8 *) state_strings[state_code];
node->type = unserialize_likely_small_unsigned_integer (sm);
node->flags = unserialize_likely_small_unsigned_integer (sm);
nnexts = unserialize_likely_small_unsigned_integer (sm);
if (nnexts > 0)
vec_validate (node->next_nodes, nnexts - 1);
for (k = 0; k < nnexts; k++)
node->next_nodes[k] =
unserialize_likely_small_unsigned_integer (sm);
stats_present = unserialize_likely_small_unsigned_integer (sm);
if (stats_present)
{
/* total clocks */
unserialize_integer (sm, &l, 8);
node->stats_total.clocks = l;
node->stats_last_clear.clocks = 0;
/* Total calls */
unserialize_integer (sm, &c, 8);
node->stats_total.calls = c;
/* Total vectors */
unserialize_integer (sm, &v, 8);
node->stats_total.vectors = v;
/* Total suspends */
unserialize_integer (sm, &d, 8);
node->stats_total.suspends = d;
}
}
}
return nodes_by_thread;
}
#if TEST_CODE
static clib_error_t *
test_node_serialize_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
vlib_node_main_t *nm = &vm->node_main;
u8 *vector = 0;
vlib_node_t ***nodes_by_thread;
vlib_node_t **nodes;
vlib_node_t *node;
vlib_node_t *next_node;
int i, j, k;
u32 max_threads = (u32) ~ 0;
int include_nexts = 0;
int include_stats = 0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "max-threads %d", &max_threads))
;
else if (unformat (input, "stats"))
include_stats = 1;
else if (unformat (input, "nexts"))
include_nexts = 1;
else
break;
}
/*
* Keep the number of memcpy ops to a minimum (e.g. 1).
* The current size of the serialized vector is
* slightly under 4K.
*/
vec_validate (vector, 16383);
vec_reset_length (vector);
vector = vlib_node_serialize (nm, vector, max_threads,
include_nexts, include_stats);
vlib_cli_output (vm, "result vector %d bytes", vec_len (vector));
nodes_by_thread = vlib_node_unserialize (vector);
vec_free (vector);
for (i = 0; i < vec_len (nodes_by_thread); i++)
{
nodes = nodes_by_thread[i];
vlib_cli_output (vm, "thread %d", i);
for (j = 0; j < vec_len (nodes); j++)
{
node = nodes[j];
vlib_cli_output (vm, "[%d] %s state %s", j, node->name,
node->state_string);
vlib_cli_output
(vm, " clocks %lld calls %lld suspends"
" %lld vectors %lld",
node->stats_total.clocks,
node->stats_total.calls,
node->stats_total.suspends, node->stats_total.vectors);
for (k = 0; k < vec_len (node->next_nodes); k++)
{
if (node->next_nodes[k] != ~0)
{
next_node = nodes[node->next_nodes[k]];
vlib_cli_output (vm, " [%d] %s", k, next_node->name);
}
}
}
}
for (j = 0; j < vec_len (nodes_by_thread); j++)
{
nodes = nodes_by_thread[j];
for (i = 0; i < vec_len (nodes); i++)
{
vec_free (nodes[i]->name);
vec_free (nodes[i]->next_nodes);
vec_free (nodes[i]);
}
vec_free (nodes);
}
vec_free (nodes_by_thread);
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (test_node_serialize_node, static) = {
.path = "test node serialize",
.short_help = "test node serialize [max-threads NN] nexts stats",
.function = test_node_serialize_command_fn,
};
/* *INDENT-ON* */
#endif
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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