from __future__ import print_function
from cffi import FFI
+import time
ffi = FFI()
ffi.cdef("""
};
} stat_segment_data_t;
+typedef struct
+{
+ uint64_t epoch;
+ uint64_t in_progress;
+ uint64_t directory_offset;
+ uint64_t error_offset;
+ uint64_t stats_offset;
+} stat_segment_shared_header_t;
+
+typedef struct
+{
+ uint64_t current_epoch;
+ stat_segment_shared_header_t *shared_header;
+ stat_segment_directory_entry_t *directory_vector;
+ ssize_t memory_size;
+} stat_client_main_t;
+
+stat_client_main_t * stat_client_get(void);
+void stat_client_free(stat_client_main_t * sm);
+int stat_segment_connect_r (char *socket_name, stat_client_main_t * sm);
int stat_segment_connect (char *socket_name);
+void stat_segment_disconnect_r (stat_client_main_t * sm);
void stat_segment_disconnect (void);
+uint32_t *stat_segment_ls_r (uint8_t ** patterns, stat_client_main_t * sm);
uint32_t *stat_segment_ls (uint8_t ** pattern);
+stat_segment_data_t *stat_segment_dump_r (uint32_t * stats, stat_client_main_t * sm);
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_r (stat_client_main_t * sm);
double stat_segment_heartbeat (void);
int stat_segment_vec_len(void *vec);
uint8_t **stat_segment_string_vector(uint8_t **string_vector, char *string);
if type(strings) is not list:
strings = [strings]
for s in strings:
- vec = api.stat_segment_string_vector(vec, ffi.new("char []", s.encode()))
+ vec = api.stat_segment_string_vector(vec, ffi.new("char []",
+ s.encode()))
return vec
# 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 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())
+class VPPStatsIOError(IOError):
+ message = "Stat segment client connection returned: " \
+ "%(retval)s %(strerror)s."
+
+ strerror = {-1: "Stat client couldn't open socket",
+ -2: "Stat client socket open but couldn't connect",
+ -3: "Receiving file descriptor failed",
+ -4: "mmap fstat failed",
+ -5: "mmap map failed"
+ }
+
+ def __init__(self, message=None, **kwargs):
+ if 'retval' in kwargs:
+ self.retval = kwargs['retval']
+ kwargs['strerror'] = self.strerror[int(self.retval)]
+
+ if not message:
+ try:
+ message = self.message % kwargs
+ except Exception as e:
+ message = self.message
+ else:
+ message = message % kwargs
+
+ super(VPPStatsIOError, self).__init__(message)
+
+
+class VPPStatsClientLoadError(RuntimeError):
+ pass
+
+
+class VPPStats(object):
+ VPPStatsIOError = VPPStatsIOError
+
+ default_socketname = '/var/run/stats.sock'
+ sharedlib_name = 'libvppapiclient.so'
+
+ def __init__(self, socketname=default_socketname, timeout=10):
+ try:
+ self.api = ffi.dlopen(VPPStats.sharedlib_name)
+ except Exception:
+ raise VPPStatsClientLoadError("Could not open: %s" %
+ VPPStats.sharedlib_name)
+ self.client = self.api.stat_client_get()
+
+ poll_end_time = time.time() + timeout
+ while time.time() < poll_end_time:
+ rv = self.api.stat_segment_connect_r(socketname.encode(),
+ self.client)
+ if rv == 0:
+ break
+
if rv != 0:
- raise IOError()
+ raise VPPStatsIOError(retval=rv)
def heartbeat(self):
- return self.api.stat_segment_heartbeat()
+ return self.api.stat_segment_heartbeat_r(self.client)
def ls(self, patterns):
- return self.api.stat_segment_ls(make_string_vector(self.api, patterns))
+ return self.api.stat_segment_ls_r(make_string_vector(self.api,
+ patterns),
+ self.client)
def dump(self, counters):
stats = {}
- rv = self.api.stat_segment_dump(counters)
+ rv = self.api.stat_segment_dump_r(counters, self.client)
# Raise exception and retry
if rv == ffi.NULL:
- raise IOError()
+ raise VPPStatsIOError()
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:
+ if e is not None:
stats[n] = e
return stats
retries = 0
while True:
try:
- dir = self.ls(name)
- return self.dump(dir).values()[0]
- except:
+ d = self.ls(name)
+ s = self.dump(d)
+ if len(s) > 1:
+ raise AttributeError('Matches multiple counters {}'
+ .format(name))
+ k, v = s.popitem()
+ return v
+ except VPPStatsIOError as e:
if retries > 10:
return None
retries += 1
- pass
def disconnect(self):
- self.api.stat_segment_disconnect()
+ self.api.stat_segment_disconnect_r(self.client)
+ self.api.stat_client_free(self.client)
def set_errors(self):
'''Return all errors counters > 0'''
error_names = self.ls(['/err/'])
error_counters = self.dump(error_names)
break
- except:
+ except VPPStatsIOError as e:
if retries > 10:
return None
retries += 1
- pass
+
return {k: error_counters[k]
for k in error_counters.keys() if error_counters[k]}