diff --git a/src/dhcp_mon.cpp b/src/dhcp_mon.cpp index ef4f6623d..10bf9c561 100644 --- a/src/dhcp_mon.cpp +++ b/src/dhcp_mon.cpp @@ -212,9 +212,14 @@ static void cleanup_stale_db_counters() static void signal_callback(evutil_socket_t fd, short event, void *arg) { syslog(LOG_INFO, "Received signal: %s", strsignal(fd)); - - dhcp_devman_print_all_status(DHCP_COUNTERS_CURRENT); - dhcp_devman_print_all_status(DHCP_COUNTERS_CURRENT_V6); + + { + counter_state_write_lock counter_lock; + if (counter_lock.owns_lock()) { + dhcp_devman_print_all_status(DHCP_COUNTERS_CURRENT); + dhcp_devman_print_all_status(DHCP_COUNTERS_CURRENT_V6); + } + } if ((fd == SIGTERM) || (fd == SIGINT)) { syslog(LOG_INFO, "Received signal to stop dhcpmon"); @@ -223,6 +228,10 @@ static void signal_callback(evutil_socket_t fd, short event, void *arg) if (fd == SIGUSR1) { // we need to sync cache counter from COUNTERS_DB syslog(LOG_INFO, "Received signal to stop writing to DB counter"); + counter_state_write_lock counter_lock; + if (!counter_lock.owns_lock()) { + return; + } std::lock_guard lock(db_sync_mutex); sock_mgr_pause_write_cache_to_db(); syslog(LOG_INFO, "Stopped writing to DB counter"); @@ -260,6 +269,10 @@ static void update_cache_counter_callback(evutil_socket_t fd, short event, void syslog(LOG_INFO, "Start updating %s cache counter from DB counter", sock_info.name); + counter_state_write_lock counter_lock; + if (!counter_lock.owns_lock()) { + return; + } std::lock_guard lock(db_sync_mutex); // can only sync db to cache counter and db updater is paused, otherwise its unexpected @@ -392,6 +405,10 @@ static void update_cache_counter_callback(evutil_socket_t fd, short event, void static void timeout_callback(evutil_socket_t fd, short event, void *arg) { syslog_debug(LOG_INFO, "Received timeout signal for DHCP relay health check"); + counter_state_write_lock counter_lock; + if (!counter_lock.owns_lock()) { + return; + } dhcp_devman_print_all_status_debug(DHCP_COUNTERS_CURRENT); dhcp_devman_print_all_status_debug(DHCP_COUNTERS_SNAPSHOT); @@ -418,22 +435,31 @@ static void db_update_callback(evutil_socket_t fd, short event, void *arg) { syslog_debug(LOG_INFO, "Received db update signal"); syslog_debug(LOG_INFO, "Sync cache counter to DB counter"); - std::lock_guard lock(db_sync_mutex); - // If there is clear counter going on and its been longer than expected - // consider the clear counter operation failed so we don't block db update forever - if (!sock_mgr_pause_write_cache_to_db_all_cleared() && last_update_time != default_time_point) { - auto now = std::chrono::steady_clock::now(); - auto elapsed = std::chrono::duration_cast(now - last_update_time); - if (elapsed.count() >= clear_counter_timeout) { - syslog(LOG_WARNING, "Clear counter going on for too long, abort clear counter"); - sock_mgr_clear_pause_write_cache_to_db(); - } else { - syslog(LOG_INFO, "Clear counter is ongoing, skip syncing write cache counter to DB counter"); + socket_counters_t counters_by_socket; + std::unique_lock lock; + { + counter_state_write_lock counter_lock; + if (!counter_lock.owns_lock()) { return; } + lock = std::unique_lock(db_sync_mutex); + // If there is clear counter going on and its been longer than expected + // consider the clear counter operation failed so we don't block db update forever + if (!sock_mgr_pause_write_cache_to_db_all_cleared() && last_update_time != default_time_point) { + auto now = std::chrono::steady_clock::now(); + auto elapsed = std::chrono::duration_cast(now - last_update_time); + if (elapsed.count() >= clear_counter_timeout) { + syslog(LOG_WARNING, "Clear counter going on for too long, abort clear counter"); + sock_mgr_clear_pause_write_cache_to_db(); + } else { + syslog(LOG_INFO, "Clear counter is ongoing, skip syncing write cache counter to DB counter"); + return; + } + } + counters_by_socket = sock_mgr_copy_cache_counters(); } last_update_time = std::chrono::steady_clock::now(); - sock_mgr_update_db_counters(); + sock_mgr_update_db_counters(counters_by_socket); cleanup_stale_db_counters(); syslog_debug(LOG_INFO, "Successfully synced cache counter to DB counter"); } diff --git a/src/event_mgr.cpp b/src/event_mgr.cpp index 6e1e0e76c..575b3ac15 100644 --- a/src/event_mgr.cpp +++ b/src/event_mgr.cpp @@ -1,4 +1,5 @@ #include +#include #include "event_mgr.h" @@ -69,18 +70,22 @@ int event_mgr::add_event(struct event* event, const struct timeval *timeout, con void event_mgr::del_all_events(const std::string &tag) { int count = 0; - for (const auto &event : this->event_map[tag]) { + const auto tagged_events = this->event_map.find(tag); + if (tagged_events == this->event_map.end()) { + return; + } + auto all_events = this->event_map.find(""); + for (const auto &event : tagged_events->second) { + int fd = event_get_fd(event); + if (!tag.empty() && all_events != this->event_map.end()) { + all_events->second.erase(event); + } event_del(event); event_free(event); count++; - syslog(LOG_INFO, "event_mgr: Deleted event (fd=%d) of tag %s from %s", event_get_fd(event), tag.c_str(), this->name.c_str()); + syslog(LOG_INFO, "event_mgr: Deleted event (fd=%d) of tag %s from %s", fd, tag.c_str(), this->name.c_str()); } - if (tag != "") { - std::unordered_set &tagless_set = this->event_map[""]; - std::unordered_set &tagged_set = this->event_map[tag]; - for (const auto &event : tagged_set) { - tagless_set.erase(event); - } + if (!tag.empty()) { this->event_map.erase(tag); } else { this->event_map.clear(); @@ -88,6 +93,74 @@ void event_mgr::del_all_events(const std::string &tag) syslog(LOG_INFO, "event_mgr: Deleted %d events of tag %s for %s", count, tag.c_str(), this->name.c_str()); } +int event_mgr::suspend_all_events(const std::string &tag) +{ + if (tag.empty()) { + syslog(LOG_ALERT, "event_mgr: Refusing to suspend untagged events for %s", + this->name.c_str()); + return -1; + } + const auto tagged_events = this->event_map.find(tag); + if (tagged_events == this->event_map.end()) { + syslog(LOG_ALERT, "event_mgr: Cannot suspend unknown tag %s for %s", + tag.c_str(), this->name.c_str()); + return -1; + } + for (const auto &event : tagged_events->second) { + if (event_get_fd(event) < 0) { + syslog(LOG_ALERT, "event_mgr: Cannot suspend non-fd event with tag %s for %s", + tag.c_str(), this->name.c_str()); + return -1; + } + } + std::vector deleted_events; + for (const auto &event : tagged_events->second) { + if (event_del(event) < 0) { + bool restore_failed = false; + for (struct event *deleted_event : deleted_events) { + if (event_add(deleted_event, NULL) < 0) { + restore_failed = true; + } + } + syslog(LOG_ALERT, "event_mgr: Failed to suspend event (fd=%d) with tag %s for %s", + event_get_fd(event), tag.c_str(), this->name.c_str()); + return restore_failed ? -2 : -1; + } + deleted_events.push_back(event); + } + return 0; +} + +int event_mgr::resume_all_events(const std::string &tag) +{ + if (tag.empty()) { + syslog(LOG_ALERT, "event_mgr: Refusing to resume untagged events for %s", + this->name.c_str()); + return -1; + } + const auto tagged_events = this->event_map.find(tag); + if (tagged_events == this->event_map.end()) { + syslog(LOG_ALERT, "event_mgr: Cannot resume unknown tag %s for %s", + tag.c_str(), this->name.c_str()); + return -1; + } + for (const auto &event : tagged_events->second) { + if (event_get_fd(event) < 0) { + syslog(LOG_ALERT, "event_mgr: Cannot resume non-fd event with tag %s for %s", + tag.c_str(), this->name.c_str()); + this->suspend_all_events(tag); + return -1; + } + if (event_add(event, NULL) < 0) { + syslog(LOG_ALERT, "event_mgr: Failed to resume event (fd=%d) with tag %s for %s", + event_get_fd(event), tag.c_str(), this->name.c_str()); + this->suspend_all_events(tag); + return -1; + } + } + return 0; +} + /** * @code activate_all_events(tag, res); * @@ -97,7 +170,15 @@ void event_mgr::del_all_events(const std::string &tag) */ void event_mgr::activate_all_events(const std::string &tag, int res) { - for (const auto &event : this->event_map[tag]) { + const auto tagged_events = this->event_map.find(tag); + if (tagged_events == this->event_map.end()) { + if (!tag.empty()) { + syslog(LOG_WARNING, "event_mgr: Cannot activate unknown tag %s for %s", + tag.c_str(), this->name.c_str()); + } + return; + } + for (const auto &event : tagged_events->second) { event_active(event, res, 0); syslog(LOG_INFO, "event_mgr: Activated event (fd=%d) of tag %s from %s", event_get_fd(event), tag.c_str(), this->name.c_str()); } diff --git a/src/event_mgr.h b/src/event_mgr.h index 90ff4a146..cca15edf8 100644 --- a/src/event_mgr.h +++ b/src/event_mgr.h @@ -12,6 +12,8 @@ class event_mgr { int init_base(); int add_event(struct event* event, const struct timeval *timeout, const std::string &tag=""); void del_all_events(const std::string &tag=""); + int suspend_all_events(const std::string &tag); + int resume_all_events(const std::string &tag); void activate_all_events(const std::string &tag="", int res=0); void free(); struct event_base* get_base(); diff --git a/src/packet_handler.cpp b/src/packet_handler.cpp index 7ec5d07a3..aa564c1a0 100644 --- a/src/packet_handler.cpp +++ b/src/packet_handler.cpp @@ -16,6 +16,8 @@ #include "dhcp_check_profile.h" /** to get dhcp/v6 check profile */ #include "util.h" +static constexpr int MAX_PACKETS_PER_CALLBACK = 64; + /** * @code _increase_cache_counter(ifname, sock, type); * @brief helper function to increase cache counter. Simple increase of counter, no complications. In the event of @@ -859,13 +861,22 @@ void packet_handler_v6(int sock, const std::string &ifname, const dhcp_device_co void callback_common(int fd, short event, void *arg) { + counter_state_read_lock counter_lock; + if (!counter_lock.owns_lock()) { + return; + } ssize_t buffer_sz; struct sockaddr_ll sll; socklen_t slen = sizeof(sll); sock_info_t &sock_info = sock_mgr_get_sock_info(fd); - while ((buffer_sz = recvfrom(fd, sock_info.buffer, sock_info.snaplen, MSG_DONTWAIT, (struct sockaddr *)&sll, &slen)) > 0) - { + for (int packet_count = 0; packet_count < MAX_PACKETS_PER_CALLBACK; packet_count++) { + slen = sizeof(sll); + buffer_sz = recvfrom(fd, sock_info.buffer, sock_info.snaplen, MSG_DONTWAIT, + (struct sockaddr *)&sll, &slen); + if (buffer_sz <= 0) { + break; + } char ifname_buf[IF_NAMESIZE]; if (if_indextoname(sll.sll_ifindex, ifname_buf) == NULL) { syslog_debug(LOG_WARNING, "if_indextoname: invalid input interface index %d %s", sll.sll_ifindex, strerror(errno)); diff --git a/src/sock_mgr.cpp b/src/sock_mgr.cpp index 8d3e48d81..e20f368d8 100644 --- a/src/sock_mgr.cpp +++ b/src/sock_mgr.cpp @@ -11,7 +11,11 @@ #include #include #include +#include +#include +#include #include +#include #include "sock_mgr.h" @@ -33,17 +37,134 @@ static const char dhcp_outbound_filter[] = "outbound and ip and udp and (port 67 static const char dhcpv6_inbound_filter[] = "inbound and ip6 and udp and (port 547 or port 546)"; static const char dhcpv6_outbound_filter[] = "outbound and ip6 and udp and (port 547 or port 546)"; -/** Tags for different events, so we can triiger only one type */ +/** Tags for different events, so we can trigger only one type */ static const char packet_handler_tag[] = "PacketHandler"; static const char cache_counter_updater_tag[] = "CacheCounterUpdater"; +static const char keepalive_tag[] = "Keepalive"; + +static void keepalive_callback(evutil_socket_t, short, void *) +{ +} /* sock fd to sock_info mapping */ std::unordered_map sock_map; +std::shared_mutex packet_handler_quiesce_mutex; +std::atomic packet_handlers_enabled{true}; +std::atomic counter_state_writers_pending{0}; +static std::unique_lock packet_handler_quiesce_lock; +static std::mutex counter_state_wait_mutex; +static std::condition_variable counter_state_wait_cv; + extern std::shared_ptr mCountersDbPtr; extern std::string downstream_ifname; +static void set_packet_handlers_enabled(bool enabled) +{ + { + std::lock_guard wait_lock(counter_state_wait_mutex); + packet_handlers_enabled.store(enabled, std::memory_order_release); + } + counter_state_wait_cv.notify_all(); +} + +counter_state_write_lock::counter_state_write_lock() +{ + { + std::lock_guard wait_lock(counter_state_wait_mutex); + counter_state_writers_pending.fetch_add(1, std::memory_order_acq_rel); + } + try { + lock = std::unique_lock(packet_handler_quiesce_mutex); + } catch (const std::system_error &e) { + bool notify = false; + { + std::lock_guard wait_lock(counter_state_wait_mutex); + notify = counter_state_writers_pending.fetch_sub(1, std::memory_order_acq_rel) == 1; + } + if (notify) { + counter_state_wait_cv.notify_all(); + } + syslog(LOG_ALERT, "Failed to lock DHCP counter state: %s", e.what()); + } +} + +counter_state_write_lock::~counter_state_write_lock() +{ + if (!lock.owns_lock()) { + return; + } + lock.unlock(); + bool notify = false; + { + std::lock_guard wait_lock(counter_state_wait_mutex); + notify = counter_state_writers_pending.fetch_sub(1, std::memory_order_acq_rel) == 1; + } + if (notify) { + counter_state_wait_cv.notify_all(); + } +} + +bool counter_state_write_lock::owns_lock() const +{ + return lock.owns_lock(); +} + +counter_state_read_lock::counter_state_read_lock() +{ + if (packet_handlers_enabled.load(std::memory_order_acquire) && + counter_state_writers_pending.load(std::memory_order_acquire) == 0) { + try { + lock = std::shared_lock(packet_handler_quiesce_mutex, + std::try_to_lock); + } catch (const std::system_error &e) { + syslog(LOG_ALERT, "Failed to lock DHCP counter state for packet handling: %s", e.what()); + return; + } + if (lock.owns_lock() && + packet_handlers_enabled.load(std::memory_order_acquire) && + counter_state_writers_pending.load(std::memory_order_acquire) == 0) { + return; + } + if (lock.owns_lock()) { + lock.unlock(); + } + } + + while (packet_handlers_enabled.load(std::memory_order_acquire)) { + { + std::unique_lock wait_lock(counter_state_wait_mutex); + counter_state_wait_cv.wait(wait_lock, [] { + return !packet_handlers_enabled.load(std::memory_order_acquire) || + counter_state_writers_pending.load(std::memory_order_acquire) == 0; + }); + } + if (!packet_handlers_enabled.load(std::memory_order_acquire)) { + return; + } + try { + lock = std::shared_lock(packet_handler_quiesce_mutex); + } catch (const std::system_error &e) { + syslog(LOG_ALERT, "Failed to lock DHCP counter state for packet handling: %s", e.what()); + return; + } + if (!packet_handlers_enabled.load(std::memory_order_acquire)) { + lock.unlock(); + return; + } + if (counter_state_writers_pending.load(std::memory_order_acquire) == 0) { + return; + } + lock.unlock(); + } +} + +bool counter_state_read_lock::owns_lock() const +{ + return lock.owns_lock(); +} + /** * @code opensocket(); * @@ -385,6 +506,18 @@ int sock_mgr_init_event_mgr() sock_mgr_free_event_mgr(); return -1; } + struct event *keepalive_event = event_new(info.event_mgr_ptr->get_base(), -1, EV_PERSIST, + keepalive_callback, NULL); + struct timeval keepalive_interval = {.tv_sec = 3600, .tv_usec = 0}; + if (keepalive_event == NULL || + info.event_mgr_ptr->add_event(keepalive_event, &keepalive_interval, keepalive_tag) < 0) { + if (keepalive_event != NULL) { + event_free(keepalive_event); + } + syslog(LOG_ALERT, "Failed to initialize event manager keepalive %s", info.name); + sock_mgr_free_event_mgr(); + return -1; + } } return 0; @@ -432,6 +565,90 @@ void sock_mgr_unregister_packet_handler() } } +int sock_mgr_suspend_packet_handler() +{ + if (packet_handler_quiesce_lock.owns_lock()) { + syslog(LOG_ALERT, "Packet handlers are already suspended"); + return -1; + } + std::vector suspended_event_mgrs; + for (const auto &entry : sock_map) { + event_mgr *event_mgr_ptr = entry.second.event_mgr_ptr; + int suspend_result = event_mgr_ptr->suspend_all_events(packet_handler_tag); + if (suspend_result < 0) { + bool rollback_failed = suspend_result < -1; + for (event_mgr *suspended_event_mgr : suspended_event_mgrs) { + if (suspended_event_mgr->resume_all_events(packet_handler_tag) < 0) { + rollback_failed = true; + } + } + if (rollback_failed) { + set_packet_handlers_enabled(false); + for (const auto &rollback_entry : sock_map) { + rollback_entry.second.event_mgr_ptr->suspend_all_events(packet_handler_tag); + } + try { + packet_handler_quiesce_lock = + std::unique_lock(packet_handler_quiesce_mutex); + } catch (const std::system_error &e) { + syslog(LOG_ALERT, "Failed to quiesce packet handlers after suspend rollback failure: %s", + e.what()); + } + } + return -1; + } + suspended_event_mgrs.push_back(event_mgr_ptr); + } + set_packet_handlers_enabled(false); + try { + packet_handler_quiesce_lock = std::unique_lock(packet_handler_quiesce_mutex); + } catch (const std::system_error &e) { + syslog(LOG_ALERT, "Failed to quiesce packet handlers: %s", e.what()); + set_packet_handlers_enabled(true); + int restore_result = 0; + for (const auto &entry : sock_map) { + if (entry.second.event_mgr_ptr->resume_all_events(packet_handler_tag) < 0) { + restore_result = -1; + } + } + if (restore_result < 0) { + set_packet_handlers_enabled(false); + for (const auto &entry : sock_map) { + entry.second.event_mgr_ptr->suspend_all_events(packet_handler_tag); + } + syslog(LOG_ALERT, "Failed to restore packet handlers after quiesce failure"); + } + return -1; + } + return 0; +} + +int sock_mgr_resume_packet_handler() +{ + if (!packet_handler_quiesce_lock.owns_lock()) { + syslog(LOG_ALERT, "Packet handlers are not suspended"); + return -1; + } + set_packet_handlers_enabled(true); + packet_handler_quiesce_lock.unlock(); + + for (const auto &entry : sock_map) { + if (entry.second.event_mgr_ptr->resume_all_events(packet_handler_tag) < 0) { + set_packet_handlers_enabled(false); + for (const auto &suspended_entry : sock_map) { + suspended_entry.second.event_mgr_ptr->suspend_all_events(packet_handler_tag); + } + try { + packet_handler_quiesce_lock = std::unique_lock(packet_handler_quiesce_mutex); + } catch (const std::system_error &e) { + syslog(LOG_ALERT, "Failed to restore packet quiesce lock after resume failure: %s", e.what()); + } + return -1; + } + } + return 0; +} + int sock_mgr_register_cache_counter_updater(event_callback_fn callback) { syslog(LOG_INFO, "Registering cache counter updater for all sockets"); @@ -614,17 +831,32 @@ bool sock_mgr_all_cache_counters_initialized(const std::string &ifname) return true; } -void sock_mgr_update_db_counters() +socket_counters_t sock_mgr_copy_cache_counters() +{ + socket_counters_t counters_by_socket; + for (const auto &[sock, info] : sock_map) { + counters_by_socket.emplace(sock, info.all_counters); + } + return counters_by_socket; +} + +void sock_mgr_update_db_counters(const socket_counters_t &counters_by_socket) { syslog_debug(LOG_INFO, "Updating all cache counters to DB counters"); - for (const auto &[sock, info] : sock_map) { + for (const auto &[sock, all_counters] : counters_by_socket) { + const auto sock_info = sock_map.find(sock); + if (sock_info == sock_map.end()) { + syslog(LOG_WARNING, "Skip DB counter snapshot for unknown socket %d", sock); + continue; + } + const sock_info_t &info = sock_info->second; syslog_debug(LOG_INFO, "Start updating socket %d %s DB counter from cache counter", sock, info.name); int msg_type_count = info.is_v6 ? DHCPV6_MESSAGE_TYPE_COUNT : DHCP_MESSAGE_TYPE_COUNT; const std::string *msg_type_name = info.is_v6 ? db_counter_name_v6 : db_counter_name; std::string all_ifname; std::string all_skipped_ifname; - for (const auto &[ifname, counter] : info.all_counters) { + for (const auto &[ifname, counter] : all_counters) { if (is_agg_counter(ifname) == true) { all_skipped_ifname += ifname + ", "; continue; @@ -634,9 +866,14 @@ void sock_mgr_update_db_counters() std::string table_name = construct_counter_db_table_key(ifname, info.is_v6); mCountersDbPtr->hset(table_name, info.is_rx ? "RX" : "TX", value); } - syslog_debug(LOG_INFO, "Processing cache counter entry of %sfor downstream vlan %s", + syslog_debug(LOG_INFO, "Processing cache counter entry of %s for downstream vlan %s", all_ifname.c_str(), downstream_ifname.c_str()); - syslog_debug(LOG_INFO, "Skipped aggregated device counter entry of %sfor downstream vlan %s", + syslog_debug(LOG_INFO, "Skipped aggregated device counter entry of %s for downstream vlan %s", all_skipped_ifname.c_str(), downstream_ifname.c_str()); } +} + +void sock_mgr_update_db_counters() +{ + sock_mgr_update_db_counters(sock_mgr_copy_cache_counters()); } \ No newline at end of file diff --git a/src/sock_mgr.h b/src/sock_mgr.h index 9619a9526..3fd882159 100644 --- a/src/sock_mgr.h +++ b/src/sock_mgr.h @@ -9,7 +9,10 @@ #ifndef SOCKET_MANAGER_H_ #define SOCKET_MANAGER_H_ +#include +#include #include +#include #include #include #include @@ -19,6 +22,7 @@ typedef std::unordered_map counter_t; typedef std::unordered_map all_counters_t; +typedef std::unordered_map socket_counters_t; /** struct for socket information */ typedef struct { @@ -41,6 +45,34 @@ typedef struct { /** sock file descriptors, serve as the identifier of all related information described in sock_info_t */ extern int rx_sock, tx_sock, rx_sock_v6, tx_sock_v6; +/** Guards in-flight packet callbacks while topology and counters are reconciled */ +extern std::shared_mutex packet_handler_quiesce_mutex; +extern std::atomic packet_handlers_enabled; +extern std::atomic counter_state_writers_pending; + +class counter_state_write_lock +{ + public: + counter_state_write_lock(); + ~counter_state_write_lock(); + bool owns_lock() const; + counter_state_write_lock(const counter_state_write_lock &) = delete; + counter_state_write_lock &operator=(const counter_state_write_lock &) = delete; + + private: + std::unique_lock lock; +}; + +class counter_state_read_lock +{ + public: + counter_state_read_lock(); + bool owns_lock() const; + + private: + std::shared_lock lock; +}; + /** Initialize socket manager with given snaplen */ int sock_mgr_init(uint32_t snaplen); @@ -59,6 +91,12 @@ int sock_mgr_register_packet_handler(); /** Unregister packet handler for socket manager */ void sock_mgr_unregister_packet_handler(); +/** Temporarily suspend registered packet handlers */ +int sock_mgr_suspend_packet_handler(); + +/** Resume registered packet handlers */ +int sock_mgr_resume_packet_handler(); + /** Register cache counter updater callback for socket manager */ int sock_mgr_register_cache_counter_updater(event_callback_fn callback); @@ -106,5 +144,9 @@ bool sock_mgr_all_cache_counters_initialized(const std::string &ifname); /** Update database counters from cache counters for all sockets */ void sock_mgr_update_db_counters(); +void sock_mgr_update_db_counters(const socket_counters_t &counters_by_socket); + +/** Copy cache counters for all sockets */ +socket_counters_t sock_mgr_copy_cache_counters(); #endif /* SOCKET_MANAGER_H_ */