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prevent resizing clients whilst reading

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This commit is contained in:
Jethro Grassie 2020-05-03 00:14:29 -04:00
parent 37f605efdc
commit bb011fa9cc
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GPG key ID: DE8ED755616565BB
1 changed files with 31 additions and 5 deletions
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36
src/pool.c
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@ -271,6 +271,8 @@ static MDB_dbi db_properties;
static BN_CTX *bn_ctx;
static BIGNUM *base_diff;
static pool_stats_t pool_stats;
static unsigned clients_reading;
static pthread_cond_t cond_clients = PTHREAD_COND_INITIALIZER;
static pthread_mutex_t mutex_clients = PTHREAD_MUTEX_INITIALIZER;
static pthread_mutex_t mutex_log = PTHREAD_MUTEX_INITIALIZER;
static pthread_mutex_t mutex_tx = PTHREAD_MUTEX_INITIALIZER;
@ -598,6 +600,9 @@ store_block(uint64_t height, block_t *block)
uint64_t
miner_hr(const char *address)
{
pthread_mutex_lock(&mutex_clients);
clients_reading++;
pthread_mutex_unlock(&mutex_clients);
client_t *c = pool_clients.clients;
uint64_t hr = 0;
for (size_t i = 0; i < pool_clients.count; i++, c++)
@ -612,6 +617,10 @@ miner_hr(const char *address)
continue;
}
}
pthread_mutex_lock(&mutex_clients);
clients_reading--;
pthread_cond_signal(&cond_clients);
pthread_mutex_unlock(&mutex_clients);
return hr;
}
@ -2674,6 +2683,8 @@ client_add(int fd, struct bufferevent *bev, bool downstream)
if (resize)
{
pthread_mutex_lock(&mutex_clients);
while (clients_reading)
pthread_cond_wait(&cond_clients, &mutex_clients);
pool_clients.count += POOL_CLIENTS_GROW;
c = realloc(pool_clients.clients, sizeof(client_t) *
pool_clients.count);
@ -3186,9 +3197,13 @@ miner_on_read(struct bufferevent *bev, void *ctx)
size_t n;
client_t *client = NULL;
pthread_mutex_lock(&mutex_clients);
clients_reading++;
pthread_mutex_unlock(&mutex_clients);
client_find(bev, &client);
if (!client)
return;
goto unlock;
input = bufferevent_get_input(bev);
output = bufferevent_get_output(bev);
@ -3202,7 +3217,7 @@ miner_on_read(struct bufferevent *bev, void *ctx)
log_info(too_long);
evbuffer_drain(input, len);
client_clear(bev);
return;
goto unlock;
}
while ((line = evbuffer_readln(input, &n, EVBUFFER_EOL_LF)))
@ -3217,7 +3232,7 @@ miner_on_read(struct bufferevent *bev, void *ctx)
log_info(invalid_json);
evbuffer_drain(input, len);
client_clear(bev);
return;
goto unlock;
}
JSON_GET_OR_WARN(method, message, json_type_string);
JSON_GET_OR_WARN(id, message, json_type_int);
@ -3268,7 +3283,7 @@ miner_on_read(struct bufferevent *bev, void *ctx)
log_info(unknown_method);
evbuffer_drain(input, len);
client_clear(bev);
return;
goto unlock;
}
if (client->bad_shares > MAX_BAD_SHARES)
{
@ -3278,9 +3293,14 @@ miner_on_read(struct bufferevent *bev, void *ctx)
log_info(too_bad);
evbuffer_drain(input, len);
client_clear(bev);
return;
goto unlock;
}
}
unlock:
pthread_mutex_lock(&mutex_clients);
clients_reading--;
pthread_cond_signal(&cond_clients);
pthread_mutex_unlock(&mutex_clients);
}
static void
@ -3293,6 +3313,8 @@ trusted_on_read(struct bufferevent *bev, void *ctx)
size_t len;
pthread_mutex_lock(&mutex_clients);
clients_reading++;
pthread_mutex_unlock(&mutex_clients);
client_find(bev, &client);
if (!client)
goto unlock;
@ -3356,6 +3378,9 @@ trusted_on_read(struct bufferevent *bev, void *ctx)
}
}
unlock:
pthread_mutex_lock(&mutex_clients);
clients_reading--;
pthread_cond_signal(&cond_clients);
pthread_mutex_unlock(&mutex_clients);
}
@ -3981,6 +4006,7 @@ cleanup(void)
pthread_mutex_destroy(&mutex_clients);
pthread_mutex_destroy(&mutex_log);
pthread_mutex_destroy(&mutex_tx);
pthread_cond_destroy(&cond_clients);
log_info("Pool shutdown successfully");
if (fd_log)
fclose(fd_log);