rgw: rgw_admin also inits curl

since we use http manager which in turn uses curl and uses curl multi
interfaces. While curl is initialized at the first call of curl_easy_init() this
method isn't guaranteed to be safe when multiple threads may call the function
since curl_global_init isn't reentrant. Calling curl_global_init via
rgw::curl::setup_curl which additionally sets up ssl interfaces etc. when
openssl is used as curl's ssl backend. Similarly moving rgw target link to
accomodate this change.

Signed-off-by: Abhishek Lekshmanan <abhishek@suse.com>

CMakeLists.txt

@@ -412,6 +412,7 @@ if (WITH_RADOSGW)
   find_package(OpenSSL)
   if (OPENSSL_FOUND)
     if (NOT NO_CURL_SSL_LINK)
+      message(STATUS "libcurl is linked with openssl: explicitly setting locks")
       set(WITH_CURL_OPENSSL ON)
     endif() # CURL_SSL_LINK
     execute_process(

src/rgw/CMakeLists.txt

@@ -157,6 +157,10 @@ if (WITH_RADOSGW_BEAST_FRONTEND)
   target_link_libraries(rgw_a Boost::coroutine Boost::context)
 endif()
 
+if (WITH_CURL_OPENSSL)
+  target_link_libraries(rgw_a ${OPENSSL_LIBRARIES})
+endif (WITH_CURL_OPENSSL)
+
 set(radosgw_srcs
   rgw_loadgen_process.cc
   rgw_civetweb.cc
@@ -191,10 +195,6 @@ add_dependencies(radosgw cls_rgw cls_lock cls_refcount
   cls_version cls_replica_log cls_user)
 install(TARGETS radosgw DESTINATION bin)
 
-if (WITH_CURL_OPENSSL)
-  target_link_libraries(radosgw ${OPENSSL_LIBRARIES})
-endif (WITH_CURL_OPENSSL)
-
 set(radosgw_admin_srcs
   rgw_admin.cc
   rgw_orphan.cc)

src/rgw/rgw_admin.cc

@@ -44,7 +44,7 @@
 #include "rgw_realm_watcher.h"
 #include "rgw_role.h"
 #include "rgw_reshard.h"
-
+#include "rgw_http_client_curl.h"
 
 #define dout_context g_ceph_context
 #define dout_subsys ceph_subsys_rgw
@@ -3014,6 +3014,7 @@ int main(int argc, const char **argv)
 
   rgw_user_init(store);
   rgw_bucket_init(store->meta_mgr);
+  rgw::curl::setup_curl(boost::none);
 
   StoreDestructor store_destructor(store);
 
@@ -7246,5 +7247,6 @@ int main(int argc, const char **argv)
     }
   }
 
+  rgw::curl::cleanup_curl();
   return 0;
 }