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apteryxd.c
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/**
* @file apteryx.c
* Server application for Apteryx.
*
* Copyright 2014, Allied Telesis Labs New Zealand, Ltd
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <sys/poll.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include "apteryx.h"
#include "internal.h"
/* Debug */
bool apteryx_debug = false;
/* Run while true */
static bool running = true;
/* RPC Service */
rpc_instance rpc = NULL;
rpc_instance proxy_rpc = NULL;
/* Statistics and debug */
counters_t counters = {};
/* Synchronise validation */
static pthread_mutex_t validating;
/* This function returns true if indexers were called (list may still be NULL) */
static bool
index_get (const char *path, GList **result)
{
GList *indexers = NULL;
GList *results = NULL;
GList *iter = NULL;
uint64_t start, duration;
bool res;
/* Retrieve a list of providers for this path */
indexers = config_get_indexers (path);
if (!indexers)
{
*result = NULL;
return false;
}
/* Find the first good indexer */
for (iter = indexers; iter; iter = g_list_next (iter))
{
cb_info_t *indexer = iter->data;
rpc_client rpc_client;
rpc_message_t msg = {};
/* Check for local provider */
if (indexer->id == getpid ())
{
apteryx_index_callback cb = (apteryx_index_callback) (long) indexer->ref;
DEBUG ("INDEX LOCAL \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
indexer->path, indexer->id, indexer->ref);
results = cb (path);
break;
}
DEBUG ("INDEX CB \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
indexer->path, indexer->id, indexer->ref);
/* Setup IPC */
rpc_client = rpc_client_connect (rpc, indexer->uri);
if (!rpc_client)
{
/* Throw away the no good validator */
ERROR ("Invalid INDEX CB %s (0x%"PRIx64",0x%"PRIx64")\n",
indexer->path, indexer->id, indexer->ref);
cb_disable (indexer);
INC_COUNTER (counters.indexed_no_handler);
continue;
}
/* Do remote index */
rpc_msg_encode_uint8 (&msg, MODE_INDEX);
rpc_msg_encode_uint64 (&msg, indexer->ref);
rpc_msg_encode_string (&msg, path);
start = get_time_us ();
res = rpc_msg_send (rpc_client, &msg);
duration = get_time_us () - start;
if (!res)
{
ERROR ("INDEX: No response\n");
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, false);
INC_COUNTER (counters.indexed_timeout);
continue;
}
while ((path = rpc_msg_decode_string (&msg)) != NULL)
{
results = g_list_prepend (results, (gpointer) strdup (path));
}
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, true);
/* Result */
INC_COUNTER (counters.indexed);
if (!GET_COUNTER (indexer->min) || duration < GET_COUNTER (indexer->min))
SET_COUNTER (indexer->min, duration);
if (duration > GET_COUNTER (indexer->max))
SET_COUNTER (indexer->max, duration);
ADD_COUNTER (indexer->total, duration);
INC_COUNTER (indexer->count);
if (results)
break;
}
g_list_free_full (indexers, (GDestroyNotify) cb_release);
*result = results;
return true;
}
static int
validate_set (const char *path, const char *value)
{
GList *validators = NULL;
GList *iter = NULL;
int32_t result = 0;
uint64_t start, duration;
bool res;
/* Retrieve a list of validators for this path */
validators = config_get_validators (path);
if (!validators)
return 0;
/* Protect sensitive values with this lock - released in apteryx_set */
pthread_mutex_lock (&validating);
/* Call each validator */
for (iter = validators; iter; iter = g_list_next (iter))
{
cb_info_t *validator = iter->data;
rpc_client rpc_client;
rpc_message_t msg = {};
/* Check for local validator */
if (validator->id == getpid ())
{
apteryx_watch_callback cb = (apteryx_watch_callback) (long) validator->ref;
DEBUG ("VALIDATE LOCAL \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
validator->path, validator->id, validator->ref);
cb (path, value);
continue;
}
DEBUG ("VALIDATE CB %s = %s (0x%"PRIx64",0x%"PRIx64")\n",
validator->path, value, validator->id, validator->ref);
/* Setup IPC */
rpc_client = rpc_client_connect (rpc, validator->uri);
if (!rpc_client)
{
/* Throw away the no good validator */
ERROR ("Invalid VALIDATE CB %s (0x%"PRIx64",0x%"PRIx64")\n",
validator->path, validator->id, validator->ref);
cb_disable (validator);
INC_COUNTER (counters.validated_no_handler);
continue;
}
/* Do remote validate */
rpc_msg_encode_uint8 (&msg, MODE_VALIDATE);
rpc_msg_encode_uint64 (&msg, validator->ref);
rpc_msg_encode_string (&msg, path);
if (value)
rpc_msg_encode_string (&msg, value);
else
rpc_msg_encode_string (&msg, "");
start = get_time_us ();
res = rpc_msg_send (rpc_client, &msg);
duration = get_time_us () - start;
if (!res)
{
INC_COUNTER (counters.validated_timeout);
ERROR ("Failed to validate for path \"%s\"\n", (char *)path);
rpc_client_release (rpc, rpc_client, false);
rpc_msg_reset (&msg);
result = errno;
break;
}
rpc_client_release (rpc, rpc_client, true);
result = (int32_t) rpc_msg_decode_uint64 (&msg);
rpc_msg_reset (&msg);
/* Result */
INC_COUNTER (counters.validated);
if (!GET_COUNTER (validator->min) || duration < GET_COUNTER (validator->min))
SET_COUNTER (validator->min, duration);
if (duration > GET_COUNTER (validator->max))
SET_COUNTER (validator->max, duration);
ADD_COUNTER (validator->total, duration);
INC_COUNTER (validator->count);
if (result < 0)
{
DEBUG ("Set of %s to %s rejected by process %"PRIu64" (%d)\n",
(char *)path, (char*)value, validator->id, result);
break;
}
}
g_list_free_full (validators, (GDestroyNotify) cb_release);
/* This one is fine, but lock is still held */
return result < 0 ? result : 1;
}
/* For a list of paths find the common starting
* path including the trailing back-slash */
static gchar *
find_common_path (GList *paths)
{
gchar *cpath = NULL;
GList *iter;
for (iter = g_list_first (paths); iter; iter = g_list_next (iter))
{
gchar *path = (gchar *) iter->data;
if (!path)
continue;
if (cpath == NULL)
cpath = g_strconcat (path, "/", NULL);
else
{
int last_slash = 0;
int i = 0;
while (1)
{
if (cpath[i] == '\0')
break;
if (cpath[i] != path[i])
{
g_free (cpath);
cpath = g_strndup (path, last_slash + 1);
break;
}
if (cpath[i] == '/')
last_slash = i;
i++;
}
}
}
if (cpath && cpath[0] == '/' && cpath[1] == '\0')
{
g_free (cpath);
cpath = NULL;
}
return cpath;
}
static gint
compare_watcher (cb_info_t *a, cb_info_t *b)
{
if (a->id == b->id && a->ref == b->ref)
return 0;
return -1;
}
static void
send_watch_notification (cb_info_t *watcher, GList *paths, GList *values, int ack)
{
rpc_client rpc_client;
rpc_message_t msg = {};
GList *ipath;
GList *ivalue;
uint64_t start, duration;
bool res;
/* IPC */
rpc_client = rpc_client_connect (rpc, watcher->uri);
if (!rpc_client)
{
/* Throw away the no good validator */
ERROR ("Invalid WATCH CB %s (0x%"PRIx64",0x%"PRIx64")\n",
watcher->path, watcher->id, watcher->ref);
cb_disable (watcher);
INC_COUNTER (counters.watched_no_handler);
return;
}
rpc_msg_encode_uint8 (&msg, ack ? MODE_WATCH_WITH_ACK : MODE_WATCH);
rpc_msg_encode_uint64 (&msg, watcher->ref);
for (ipath = g_list_first (paths), ivalue = g_list_first (values);
ipath;
ipath = g_list_next (ipath), ivalue = g_list_next (ivalue))
{
rpc_msg_encode_string (&msg, (char *) ipath->data);
if (ivalue && ivalue->data)
rpc_msg_encode_string (&msg, (char *) ivalue->data);
else
rpc_msg_encode_string (&msg, "");
}
start = get_time_us ();
res = rpc_msg_send (rpc_client, &msg);
duration = get_time_us () - start;
if (!res)
{
INC_COUNTER (counters.watched_timeout);
ERROR ("Failed to notify watcher for path \"%s\"\n", watcher->path);
rpc_client_release (rpc, rpc_client, false);
}
else
{
rpc_client_release (rpc, rpc_client, true);
}
rpc_msg_reset (&msg);
INC_COUNTER (counters.watched);
if (!GET_COUNTER (watcher->min) || duration < GET_COUNTER (watcher->min))
SET_COUNTER (watcher->min, duration);
if (duration > GET_COUNTER (watcher->max))
SET_COUNTER (watcher->max, duration);
ADD_COUNTER (watcher->total, duration);
INC_COUNTER (watcher->count);
}
static void
notify_watchers (GList *paths, GList *values, bool ack)
{
GList *common_watchers = NULL;
GList *used_watchers = NULL;
gchar *cpath = NULL;
GList *ipath;
GList *ivalue;
/* Try to send all values at once if they have a common path */
if (g_list_length (paths) > 1)
cpath = find_common_path (paths);
if (cpath)
{
common_watchers = config_get_watchers (cpath);
if (common_watchers)
{
GList *iter = NULL;
for (iter = common_watchers; iter; iter = g_list_next (iter))
{
cb_info_t *watcher = iter->data;
if (watcher->id != getpid ())
{
send_watch_notification (watcher, paths, values, ack);
/* Remember so we dont use this one again */
used_watchers = g_list_append (used_watchers, watcher);
}
}
}
g_free (cpath);
}
/* Find all watchers that did not match the common path */
ipath = g_list_first (paths);
ivalue = values ? g_list_first (values) : NULL;
while (ipath)
{
gchar *path = (gchar *) ipath->data;
gchar *value = ivalue ? (gchar *) ivalue->data : NULL;
GList *watchers;
if (path && (watchers = config_get_watchers (path)))
{
GList *iter;
for (iter = watchers; iter; iter = g_list_next (iter))
{
cb_info_t *watcher = iter->data;
if (g_list_find_custom (used_watchers, iter->data, (GCompareFunc) compare_watcher))
continue;
if (watcher->id == getpid ())
{
apteryx_watch_callback cb = (apteryx_watch_callback) (long) watcher->ref;
DEBUG ("WATCH LOCAL \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
watcher->path, watcher->id, watcher->ref);
if (value && (value[0] == '\0'))
cb (path, NULL);
else
cb (path, value);
continue;
}
GList *paths = g_list_append(NULL, (void *) path);
GList *values = g_list_append(NULL, (void *) value);
send_watch_notification (watcher, paths, values, ack);
g_list_free (paths);
g_list_free (values);
}
g_list_free_full (watchers, (GDestroyNotify) cb_release);
}
ipath = g_list_next (ipath);
ivalue = ivalue ? g_list_next (ivalue) : NULL;
}
g_list_free (used_watchers);
g_list_free_full (common_watchers, (GDestroyNotify) cb_release);
}
static uint64_t
calculate_timestamp (void)
{
struct timespec tms;
uint64_t micros = 0;
if (clock_gettime(CLOCK_MONOTONIC_RAW, &tms)) {
return 0;
}
micros = ((uint64_t)tms.tv_sec) * 1000000;
micros += tms.tv_nsec/1000;
return micros;
}
static void
call_refreshers (const char *path)
{
GList *refreshers = NULL;
GList *iter = NULL;
uint64_t timestamp;
uint64_t now;
uint64_t timeout = 0;
/* Retrieve a list of refreshers for this path */
refreshers = config_get_refreshers (path);
if (!refreshers)
return;
/* Get the time of the request */
now = calculate_timestamp ();
/* Get the latest timestamp for the path */
timestamp = db_timestamp (path);
/* Call each refresher */
for (iter = refreshers; iter; iter = g_list_next (iter))
{
cb_info_t *refresher = iter->data;
rpc_client rpc_client;
rpc_message_t msg = {};
uint64_t start, duration;
bool res;
if (pthread_mutex_trylock (&refresher->lock))
{
/* If this refresher was being called when we came in, take the lock once
* the last call has finished, and get the new timestamp.
*/
pthread_mutex_lock (&refresher->lock);
timestamp = db_timestamp (path);
}
/* Check if it is time to refresh */
if (now < (timestamp + refresher->timeout))
{
DEBUG ("Not refreshing %s (now:%"PRIu64" < (ts:%"PRIu64" + to:%"PRIu64"))\n",
path, now, timestamp, refresher->timeout);
goto unlock;
}
DEBUG ("Refreshing %s (now:%"PRIu64" >= (ts:%"PRIu64" + to:%"PRIu64"))\n",
path, now, timestamp, refresher->timeout);
/* Check for local refresher */
if (refresher->id == getpid ())
{
apteryx_refresh_callback cb = (apteryx_refresh_callback) (long) refresher->ref;
DEBUG ("REFRESH LOCAL \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
refresher->path, refresher->id, refresher->ref);
timeout = cb (path);
if (refresher->timeout == 0 || timeout < refresher->timeout)
refresher->timeout = timeout;
goto unlock;
}
DEBUG ("REFRESH CB %s (%s 0x%"PRIx64",0x%"PRIx64",%s)\n",
path, refresher->path, refresher->id, refresher->ref, refresher->uri);
/* IPC */
rpc_client = rpc_client_connect (rpc, refresher->uri);
if (!rpc_client)
{
/* Throw away the no good validator */
ERROR ("Invalid REFRESH CB %s (0x%"PRIx64",0x%"PRIx64")\n",
refresher->path, refresher->id, refresher->ref);
cb_disable (refresher);
INC_COUNTER (counters.refreshed_no_handler);
goto unlock;
}
rpc_msg_encode_uint8 (&msg, MODE_REFRESH);
rpc_msg_encode_uint64 (&msg, refresher->ref);
rpc_msg_encode_string (&msg, path);
start = get_time_us ();
res = rpc_msg_send (rpc_client, &msg);
duration = get_time_us () - start;
if (!res)
{
INC_COUNTER (counters.refreshed_timeout);
ERROR ("Failed to notify refresher for path \"%s\"\n", (char *) path);
rpc_client_release (rpc, rpc_client, false);
}
else
{
rpc_client_release (rpc, rpc_client, true);
timeout = rpc_msg_decode_uint64 (&msg);
DEBUG ("REFRESH again in %"PRIu64"us\n", timeout);
if (refresher->timeout == 0 || timeout < refresher->timeout)
refresher->timeout = timeout;
/* Make sure the DB has up to date timestamps */
db_update_timestamps (path, now);
}
rpc_msg_reset (&msg);
INC_COUNTER (counters.refreshed);
if (!GET_COUNTER (refresher->min) || duration < GET_COUNTER (refresher->min))
SET_COUNTER (refresher->min, duration);
if (duration > GET_COUNTER (refresher->max))
SET_COUNTER (refresher->max, duration);
ADD_COUNTER (refresher->total, duration);
INC_COUNTER (refresher->count);
unlock:
pthread_mutex_unlock (&refresher->lock);
}
g_list_free_full (refreshers, (GDestroyNotify) cb_release);
}
static char *
provide_get (const char *path)
{
GList *providers = NULL;
char *value = NULL;
GList *iter = NULL;
/* Retrieve a list of providers for this path */
providers = config_get_providers (path);
if (!providers)
return NULL;
/* Find the first good provider */
for (iter = providers; iter; iter = g_list_next (iter))
{
cb_info_t *provider = iter->data;
rpc_client rpc_client;
rpc_message_t msg = {};
uint64_t start, duration;
bool res;
/* Check for local provider */
if (provider->id == getpid ())
{
apteryx_provide_callback cb = (apteryx_provide_callback) (long) provider->ref;
DEBUG ("PROVIDE LOCAL \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
provider->path, provider->id, provider->ref);
value = cb (path);
break;
}
DEBUG ("PROVIDE CB \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
provider->path, provider->id, provider->ref);
/* Setup IPC */
rpc_client = rpc_client_connect (rpc, provider->uri);
if (!rpc_client)
{
/* Throw away the no good validator */
ERROR ("Invalid PROVIDE CB %s (0x%"PRIx64",0x%"PRIx64")\n",
provider->path, provider->id, provider->ref);
cb_disable (provider);
INC_COUNTER (counters.provided_no_handler);
continue;
}
/* Do remote get */
rpc_msg_encode_uint8 (&msg, MODE_PROVIDE);
rpc_msg_encode_uint64 (&msg, provider->ref);
rpc_msg_encode_string (&msg, path);
start = get_time_us ();
res = rpc_msg_send (rpc_client, &msg);
duration = get_time_us () - start;
if (!res)
{
INC_COUNTER (counters.provided_timeout);
ERROR ("No response from provider for path \"%s\"\n", (char *)path);
rpc_client_release (rpc, rpc_client, false);
}
else
{
rpc_client_release (rpc, rpc_client, true);
value = rpc_msg_decode_string (&msg);
if (value)
value = strdup (value);
}
rpc_msg_reset (&msg);
INC_COUNTER (counters.provided);
if (!GET_COUNTER (provider->min) || duration < GET_COUNTER (provider->min))
SET_COUNTER (provider->min, duration);
if (duration > GET_COUNTER (provider->max))
SET_COUNTER (provider->max, duration);
ADD_COUNTER (provider->total, duration);
INC_COUNTER (provider->count);
if (value)
break;
}
g_list_free_full (providers, (GDestroyNotify) cb_release);
return value;
}
static void*
find_proxy (const char **path, cb_info_t **proxy_pt)
{
rpc_client rpc_client;
GList *proxies = NULL;
GList *iter = NULL;
*proxy_pt = NULL;
/* Retrieve a list of proxies for this path */
proxies = config_get_proxies (*path);
if (!proxies)
return NULL;
/* Find the first good proxy */
for (iter = proxies; iter; iter = g_list_next (iter))
{
cb_info_t *proxy = iter->data;
int len = strlen (proxy->path);
/* Setup IPC */
rpc_client = rpc_client_connect (proxy_rpc, proxy->uri);
if (!rpc_client)
{
ERROR ("Invalid PROXY CB %s (%s)\n", proxy->path, proxy->uri);
cb_disable (proxy);
INC_COUNTER (counters.proxied_no_handler);
continue;
}
INC_COUNTER (counters.proxied);
INC_COUNTER (proxy->count);
/* Strip proxied path */
if (proxy->path[len-1] == '*')
len -= 1;
if (proxy->path[len-1] == '/')
len -= 1;
*path = *path + len;
DEBUG ("PROXY CB \"%s\" to \"%s\"\n", *path, proxy->uri);
*proxy_pt = proxy;
break;
}
g_list_free_full (proxies, (GDestroyNotify) cb_release);
return rpc_client;
}
static int32_t
proxy_set (const char *path, const char *value, uint64_t ts)
{
rpc_client rpc_client;
rpc_message_t msg = {};
int32_t result = 1;
cb_info_t *proxy = NULL;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client)
{
/* A positive value is interpreted as proxy not found */
return 1;
}
/* Do remote set */
rpc_msg_encode_uint8 (&msg, MODE_SET);
rpc_msg_encode_uint64 (&msg, ts);
rpc_msg_encode_string (&msg, path);
if (value)
rpc_msg_encode_string (&msg, value);
else
rpc_msg_encode_string (&msg, "");
if (!rpc_msg_send (rpc_client, &msg))
{
ERROR ("PROXY SET: No response\n");
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, false);
}
else
{
result = rpc_msg_decode_uint64 (&msg);
rpc_msg_reset (&msg);
if (result < 0)
{
DEBUG ("PROXY SET: Error response: %s\n", strerror (-result));
errno = result;
}
rpc_client_release (rpc, rpc_client, true);
}
return result;
}
static char *
proxy_get (const char *path)
{
rpc_client rpc_client;
rpc_message_t msg = {};
cb_info_t *proxy = NULL;
char *value = NULL;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client)
return NULL;
/* Do remote get */
rpc_msg_encode_uint8 (&msg, MODE_GET);
rpc_msg_encode_string (&msg, path);
if (!rpc_msg_send (rpc_client, &msg))
{
INC_COUNTER (counters.proxied_timeout);
ERROR ("No response from proxy for path \"%s\"\n", (char *)path);
rpc_client_release (rpc, rpc_client, false);
}
else
{
rpc_client_release (rpc, rpc_client, true);
value = rpc_msg_decode_string (&msg);
if (value)
value = strdup (value);
}
rpc_msg_reset (&msg);
return value;
}
static GList *
proxy_search (const char *path)
{
rpc_client rpc_client;
rpc_message_t msg = {};
GList *paths = NULL;
const char *in_path = path;
cb_info_t *proxy = NULL;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client)
return NULL;
/* Do remote search */
rpc_msg_encode_uint8 (&msg, MODE_SEARCH);
rpc_msg_encode_string (&msg, path);
if (!rpc_msg_send (rpc_client, &msg))
{
INC_COUNTER (counters.proxied_timeout);
ERROR ("No response from proxy for path \"%s\"\n", (char *)path);
rpc_client_release (rpc, rpc_client, false);
}
else
{
/* Prepend local path to start of all search results */
size_t path_len = path - in_path;
char *local_path = g_malloc0 (path_len + 1);
strncpy (local_path, in_path, path_len);
while ((path = rpc_msg_decode_string (&msg)) != NULL)
{
char *tmp = g_strdup_printf ("%s%s", local_path, path);
paths = g_list_prepend (paths, (gpointer) tmp);
}
g_free (local_path);
rpc_client_release (rpc, rpc_client, true);
}
rpc_msg_reset (&msg);
return paths;
}
static bool
proxy_traverse (GList **paths, GList **values, const char *path)
{
rpc_client rpc_client;
rpc_message_t msg = {};
const char *in_path = path;
int slen;
char *value;
cb_info_t *proxy = NULL;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client)
return false;
slen = strlen (path);
/* Do remote traverse */
rpc_msg_encode_uint8 (&msg, MODE_TRAVERSE);
rpc_msg_encode_string (&msg, path);
if (!rpc_msg_send (rpc_client, &msg))
{
INC_COUNTER (counters.proxied_timeout);
ERROR ("No response from proxy for path \"%s\"\n", (char *)path);
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, false);
return false;
}
path = rpc_msg_decode_string (&msg);
if (path)
{
while (path)
{
value = rpc_msg_decode_string (&msg);
*paths = g_list_prepend (*paths, (gpointer) g_strconcat (in_path, path + slen, NULL));
*values = g_list_prepend (*values, (gpointer) g_strdup (value));
path = rpc_msg_decode_string (&msg);
}
}
else
{
DEBUG ("(P) = (null)\n");
}
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, true);
return true;
}
static int32_t
proxy_prune (const char *path)
{
rpc_client rpc_client;
rpc_message_t msg = {};
cb_info_t *proxy = NULL;
int32_t result = 0;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client)
return 1;
/* Do remote prune */
rpc_msg_encode_uint8 (&msg, MODE_PRUNE);
rpc_msg_encode_string (&msg, path);
if (!rpc_msg_send (rpc_client, &msg))
{
ERROR ("PROXY PRUNE: No response\n");
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, false);
return -ETIMEDOUT;
}
result = rpc_msg_decode_uint64 (&msg);
rpc_msg_reset (&msg);
if (result < 0)
{
DEBUG ("PROXY PRUNE: Error response: %s\n", strerror (-result));
}
rpc_client_release (rpc, rpc_client, true);
return result;
}
static uint64_t
proxy_timestamp (const char *path)
{
rpc_client rpc_client;
rpc_message_t msg = {};
uint64_t value = 0;
cb_info_t *proxy = NULL;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client)
return 0;
/* Do remote timestamp */
rpc_msg_encode_uint8 (&msg, MODE_TIMESTAMP);
rpc_msg_encode_string (&msg, path);
if (!rpc_msg_send (rpc_client, &msg))
{
INC_COUNTER (counters.proxied_timeout);
ERROR ("No response from proxy for path \"%s\"\n", (char *)path);
rpc_client_release (rpc, rpc_client, false);
return value;
}
value = rpc_msg_decode_uint64 (&msg);
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, true);
return value;
}
static bool
handle_set (rpc_message msg, bool ack)
{
int result = 0;
uint64_t ts = 0;
GList *paths = NULL;
GList *ipath;
const char *path;
GList *values = NULL;
GList *ivalue;
const char *value;
int proxy_result = 0;
int validation_result = 0;
int validation_lock = 0;
bool db_result = false;
GList *next;
/* Parse the parameters */
ts = rpc_msg_decode_uint64 (msg);
while ((path = rpc_msg_decode_string (msg)) != NULL)
{
value = rpc_msg_decode_string (msg);
DEBUG ("SET: %s = %s\n", path, value);
paths = g_list_prepend (paths, (gpointer)path);
values = g_list_prepend (values, (gpointer)value);
}
paths = g_list_reverse (paths);
values = g_list_reverse (values);
INC_COUNTER (counters.set);
/* Proxy first */
ipath = g_list_first (paths);
ivalue = g_list_first (values);
while (ipath && ivalue)
{
path = (const char *) ipath->data;
value = (const char *) ivalue->data;
if (value && value[0] == '\0')
value = NULL;
proxy_result = proxy_set (path, value, ts);
if (proxy_result == 0)
{
/* Result success */
DEBUG ("SET: %s = %s proxied\n", path, value);
/* Call any watchers */
GList *wpaths = g_list_append (NULL, (gpointer) path);
GList *wvalues = g_list_append (NULL, (gpointer) value);
notify_watchers (wpaths, wvalues, ack);
g_list_free (wpaths);
g_list_free (wvalues);
/* Safely remove from both lists as we dont need to do any more processing */
next = g_list_next (ipath);
paths = g_list_delete_link (paths, ipath);
ipath = next;
next = g_list_next (ivalue);
values = g_list_delete_link (values, ivalue);
ivalue = next;
continue;
}
else if (proxy_result < 0)
{
result = proxy_result;
goto exit;
}
ipath = g_list_next (ipath);
ivalue = g_list_next (ivalue);
}
/* Validate */
for (ipath = g_list_first (paths), ivalue = g_list_first (values);
ipath && ivalue; ipath = g_list_next (ipath), ivalue = g_list_next (ivalue))
{
path = (const char *) ipath->data;
value = (const char *) ivalue->data;
if (value && value[0] == '\0')
value = NULL;
/* Validate new data */
validation_result = validate_set (path, value);
if (validation_result != 0)
validation_lock++;
if (validation_result < 0)
{
DEBUG ("SET: %s = %s refused by validate\n", path, value);
result = validation_result;
goto exit;
}
}
/* Set in the database */
pthread_rwlock_wrlock (&db_lock);
for (ipath = g_list_first (paths), ivalue = g_list_first (values);
ipath && ivalue; ipath = g_list_next (ipath), ivalue = g_list_next (ivalue))
{
path = (const char *) ipath->data;
value = (const char *) ivalue->data;
if (value && value[0] == '\0')
value = NULL;
/* Add/Delete to/from database */