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#!/usr/bin/env python
from __future__ import print_function
from cffi import FFI
ffi = FFI()
ffi.cdef("""
typedef uint64_t counter_t;
typedef struct {
counter_t packets;
counter_t bytes;
} vlib_counter_t;
typedef enum {
STAT_DIR_TYPE_ILLEGAL = 0,
STAT_DIR_TYPE_SCALAR_INDEX,
STAT_DIR_TYPE_COUNTER_VECTOR_SIMPLE,
STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED,
STAT_DIR_TYPE_ERROR_INDEX,
} stat_directory_type_t;
typedef struct
{
stat_directory_type_t type;
union {
uint64_t offset;
uint64_t index;
uint64_t value;
};
uint64_t offset_vector;
char name[128]; // TODO change this to pointer to "somewhere"
} stat_segment_directory_entry_t;
typedef struct
{
char *name;
stat_directory_type_t type;
union
{
double scalar_value;
uint64_t error_value;
counter_t **simple_counter_vec;
vlib_counter_t **combined_counter_vec;
};
} stat_segment_data_t;
int stat_segment_connect (char *socket_name);
void stat_segment_disconnect (void);
uint32_t *stat_segment_ls (uint8_t ** pattern);
stat_segment_data_t *stat_segment_dump (uint32_t * counter_vec);
void stat_segment_data_free (stat_segment_data_t * res);
double stat_segment_heartbeat (void);
int stat_segment_vec_len(void *vec);
uint8_t **stat_segment_string_vector(uint8_t **string_vector, char *string);
""")
# Utility functions
def make_string_vector(api, strings):
vec = ffi.NULL
if type(strings) is not list:
strings = [strings]
for s in strings:
vec = api.stat_segment_string_vector(vec, ffi.new("char []", s.encode()))
return vec
def make_string_list(api, vec):
vec_len = api.stat_segment_vec_len(vec)
return [ffi.string(vec[i]) for i in range(vec_len)]
# 2-dimensonal array of thread, index
def simple_counter_vec_list(api, e):
vec = []
for thread in range(api.stat_segment_vec_len(e)):
len_interfaces = api.stat_segment_vec_len(e[thread])
if_per_thread = [e[thread][interfaces]
for interfaces in range(len_interfaces)]
vec.append(if_per_thread)
return vec
def vlib_counter_dict(c):
return {'packets': c.packets,
'bytes': c.bytes}
def combined_counter_vec_list(api, e):
vec = []
for thread in range(api.stat_segment_vec_len(e)):
len_interfaces = api.stat_segment_vec_len(e[thread])
if_per_thread = [vlib_counter_dict(e[thread][interfaces])
for interfaces in range(len_interfaces)]
vec.append(if_per_thread)
return vec
def stat_entry_to_python(api, e):
# Scalar index
if e.type == 1:
return e.scalar_value
return None
if e.type == 2:
return simple_counter_vec_list(api, e.simple_counter_vec)
if e.type == 3:
return combined_counter_vec_list(api, e.combined_counter_vec)
if e.type == 4:
return e.error_value
return None
class VPPStats:
def __init__(self, socketname='/var/run/stats.sock'):
self.api = ffi.dlopen('libvppapiclient.so')
rv = self.api.stat_segment_connect(socketname.encode())
if rv != 0:
raise IOError()
def heartbeat(self):
return self.api.stat_segment_heartbeat()
def ls(self, patterns):
return self.api.stat_segment_ls(make_string_vector(self.api, patterns))
def dump(self, counters):
stats = {}
rv = self.api.stat_segment_dump(counters)
# Raise exception and retry
if rv == ffi.NULL:
raise IOError()
rv_len = self.api.stat_segment_vec_len(rv)
for i in range(rv_len):
n = ffi.string(rv[i].name).decode()
e = stat_entry_to_python(self.api, rv[i])
if e != None:
stats[n] = e
return stats
def get_counter(self, name):
retries = 0
while True:
try:
dir = self.ls(name)
return self.dump(dir).values()[0]
except:
if retries > 10:
return None
retries += 1
pass
def disconnect(self):
self.api.stat_segment_disconnect()
def set_errors(self):
'''Return all errors counters > 0'''
retries = 0
while True:
try:
error_names = self.ls(['/err/'])
error_counters = self.dump(error_names)
break
except:
if retries > 10:
return None
retries += 1
pass
return {k: error_counters[k]
for k in error_counters.keys() if error_counters[k]}
def set_errors_str(self):
'''Return all errors counters > 0 pretty printed'''
s = 'ERRORS:\n'
error_counters = self.set_errors()
for k in sorted(error_counters):
s += '{:<60}{:>10}\n'.format(k, error_counters[k])
return s
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