From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:45:59 +0200 Subject: Adding upstream version 16.2.11+ds. Signed-off-by: Daniel Baumann --- src/common/TracepointProvider.cc | 45 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 src/common/TracepointProvider.cc (limited to 'src/common/TracepointProvider.cc') diff --git a/src/common/TracepointProvider.cc b/src/common/TracepointProvider.cc new file mode 100644 index 000000000..38529f3df --- /dev/null +++ b/src/common/TracepointProvider.cc @@ -0,0 +1,45 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "common/TracepointProvider.h" +#include "common/config.h" + +TracepointProvider::TracepointProvider(CephContext *cct, const char *library, + const char *config_key) + : m_cct(cct), m_library(library), m_config_keys{config_key, NULL} +{ + m_cct->_conf.add_observer(this); + verify_config(m_cct->_conf); +} + +TracepointProvider::~TracepointProvider() { + m_cct->_conf.remove_observer(this); + if (m_handle) { + dlclose(m_handle); + } +} + +void TracepointProvider::handle_conf_change( + const ConfigProxy& conf, const std::set &changed) { + if (changed.count(m_config_keys[0])) { + verify_config(conf); + } +} + +void TracepointProvider::verify_config(const ConfigProxy& conf) { + std::lock_guard locker(m_lock); + if (m_handle) { + return; + } + + char buf[10]; + char *pbuf = buf; + if (conf.get_val(m_config_keys[0], &pbuf, sizeof(buf)) != 0 || + strncmp(buf, "true", 5) != 0) { + return; + } + + m_handle = dlopen(m_library.c_str(), RTLD_NOW | RTLD_NODELETE); + ceph_assert(m_handle); +} + -- cgit v1.2.3