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/* SPDX-License-Identifier: Apache-2.0
* Copyright(c) 2022 Cisco Systems, Inc.
*/
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vlib/stats/stats.h>
enum
{
NODE_CLOCKS,
NODE_VECTORS,
NODE_CALLS,
NODE_SUSPENDS,
N_NODE_COUNTERS
};
struct
{
u32 entry_index;
char *name;
} node_counters[] = {
[NODE_CLOCKS] = { .name = "clocks" },
[NODE_VECTORS] = { .name = "vectors" },
[NODE_CALLS] = { .name = "calls" },
[NODE_SUSPENDS] = { .name = "suspends" },
};
static struct
{
u8 *name;
u32 symlinks[N_NODE_COUNTERS];
} *node_data = 0;
static vlib_stats_string_vector_t node_names = 0;
static inline void
update_node_counters (vlib_stats_segment_t *sm)
{
clib_bitmap_t *bmp = 0;
vlib_main_t **stat_vms = 0;
vlib_node_t ***node_dups = 0;
u32 n_nodes;
int i, j;
vlib_node_get_nodes (0 /* vm, for barrier sync */,
(u32) ~0 /* all threads */, 1 /* include stats */,
0 /* barrier sync */, &node_dups, &stat_vms);
n_nodes = vec_len (node_dups[0]);
vec_validate (node_data, n_nodes - 1);
for (i = 0; i < n_nodes; i++)
if (vec_is_equal (node_data[i].name, node_dups[0][i]->name) == 0)
bmp = clib_bitmap_set (bmp, i, 1);
if (bmp)
{
u32 last_thread = vlib_get_n_threads ();
vlib_stats_segment_lock ();
clib_bitmap_foreach (i, bmp)
{
if (node_data[i].name)
{
vec_free (node_data[i].name);
for (j = 0; j < ARRAY_LEN (node_data->symlinks); j++)
vlib_stats_remove_entry (node_data[i].symlinks[j]);
}
}
/* We can't merge the loops because a node index corresponding to a given
* node name can change between 2 updates. Otherwise, we could add
* already existing symlinks or delete valid ones.
*/
clib_bitmap_foreach (i, bmp)
{
vlib_node_t *n = node_dups[0][i];
node_data[i].name = vec_dup (n->name);
vlib_stats_set_string_vector (&node_names, n->index, "%v", n->name);
for (int j = 0; j < ARRAY_LEN (node_counters); j++)
{
vlib_stats_validate (node_counters[j].entry_index, last_thread,
n_nodes - 1);
node_data[i].symlinks[j] = vlib_stats_add_symlink (
node_counters[j].entry_index, n->index, "/nodes/%U/%s",
format_vlib_stats_symlink, n->name, node_counters[j].name);
ASSERT (node_data[i].symlinks[j] != CLIB_U32_MAX);
}
}
vlib_stats_segment_unlock ();
vec_free (bmp);
}
for (j = 0; j < vec_len (node_dups); j++)
{
vlib_node_t **nodes = node_dups[j];
for (i = 0; i < vec_len (nodes); i++)
{
counter_t **counters;
counter_t *c;
vlib_node_t *n = nodes[i];
counters = vlib_stats_get_entry_data_pointer (
node_counters[NODE_CLOCKS].entry_index);
c = counters[j];
c[n->index] = n->stats_total.clocks - n->stats_last_clear.clocks;
counters = vlib_stats_get_entry_data_pointer (
node_counters[NODE_VECTORS].entry_index);
c = counters[j];
c[n->index] = n->stats_total.vectors - n->stats_last_clear.vectors;
counters = vlib_stats_get_entry_data_pointer (
node_counters[NODE_CALLS].entry_index);
c = counters[j];
c[n->index] = n->stats_total.calls - n->stats_last_clear.calls;
counters = vlib_stats_get_entry_data_pointer (
node_counters[NODE_SUSPENDS].entry_index);
c = counters[j];
c[n->index] = n->stats_total.suspends - n->stats_last_clear.suspends;
}
vec_free (node_dups[j]);
}
vec_free (node_dups);
vec_free (stat_vms);
}
static void
do_stat_segment_updates (vlib_main_t *vm, vlib_stats_segment_t *sm)
{
if (sm->node_counters_enabled)
update_node_counters (sm);
vlib_stats_collector_t *c;
pool_foreach (c, sm->collectors)
{
vlib_stats_collector_data_t data = {
.entry_index = c->entry_index,
.vector_index = c->vector_index,
.private_data = c->private_data,
.entry = sm->directory_vector + c->entry_index,
};
c->fn (&data);
}
/* Heartbeat, so clients detect we're still here */
sm->directory_vector[STAT_COUNTER_HEARTBEAT].value++;
}
static uword
stat_segment_collector_process (vlib_main_t *vm, vlib_node_runtime_t *rt,
vlib_frame_t *f)
{
vlib_stats_segment_t *sm = vlib_stats_get_segment ();
if (sm->node_counters_enabled)
{
node_names = vlib_stats_add_string_vector ("/sys/node/names");
ASSERT (node_names);
for (int x = 0; x < ARRAY_LEN (node_counters); x++)
{
node_counters[x].entry_index = vlib_stats_add_counter_vector (
"/sys/node/%s", node_counters[x].name);
ASSERT (node_counters[x].entry_index != CLIB_U32_MAX);
}
}
sm->directory_vector[STAT_COUNTER_BOOTTIME].value = unix_time_now ();
while (1)
{
do_stat_segment_updates (vm, sm);
vlib_process_suspend (vm, sm->update_interval);
}
return 0; /* or not */
}
VLIB_REGISTER_NODE (stat_segment_collector, static) = {
.function = stat_segment_collector_process,
.name = "statseg-collector-process",
.type = VLIB_NODE_TYPE_PROCESS,
};
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