From 799edc73c3d4f694c365c6a7c27c9ab8eed5f260 Mon Sep 17 00:00:00 2001 From: Xiubo Li Date: Fri, 26 Jul 2019 12:34:52 +0800 Subject: event: rename event_XXX with gf_ prefixed I hit one crash issue when using the libgfapi. In the libgfapi it will call glfs_poller() --> event_dispatch() in file api/src/glfs.c:721, and the event_dispatch() is defined by libgluster locally, the problem is the name of event_dispatch() is the extremly the same with the one from libevent package form the OS. For example, if a executable program Foo, which will also use and link the libevent and the libgfapi at the same time, I can hit the crash, like: kernel: glfs_glfspoll[68486]: segfault at 1c0 ip 00007fef006fd2b8 sp 00007feeeaffce30 error 4 in libevent-2.0.so.5.1.9[7fef006ed000+46000] The link for Foo is: lib_foo_LADD = -levent $(GFAPI_LIBS) It will crash. This is because the glfs_poller() is calling the event_dispatch() from the libevent, not the libglsuter. The gfapi link info : GFAPI_LIBS = -lacl -lgfapi -lglusterfs -lgfrpc -lgfxdr -luuid If I link Foo like: lib_foo_LADD = $(GFAPI_LIBS) -levent It will works well without any problem. And if Foo call one private lib, such as handler_glfs.so, and the handler_glfs.so will link the GFAPI_LIBS directly, while the Foo won't and it will dlopen(handler_glfs.so), then the crash will be hit everytime. The link info will be: foo_LADD = -levent libhandler_glfs_LIBADD = $(GFAPI_LIBS) I can avoid the crash temporarily by linking the GFAPI_LIBS in Foo too like: foo_LADD = $(GFAPI_LIBS) -levent libhandler_glfs_LIBADD = $(GFAPI_LIBS) But this is ugly since the Foo won't use any APIs from the GFAPI_LIBS. And in some cases when the --as-needed link option is added(on many dists it is added as default), then the crash is back again, the above workaround won't work. Fixes: #699 Change-Id: I38f0200b941bd1cff4bf3066fca2fc1f9a5263aa Signed-off-by: Xiubo Li --- xlators/protocol/client/src/client.c | 4 ++-- xlators/protocol/server/src/server.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) (limited to 'xlators/protocol') diff --git a/xlators/protocol/client/src/client.c b/xlators/protocol/client/src/client.c index 94d878a47fd..776e7160c51 100644 --- a/xlators/protocol/client/src/client.c +++ b/xlators/protocol/client/src/client.c @@ -2637,8 +2637,8 @@ client_check_event_threads(xlator_t *this, clnt_conf_t *conf, int32_t old, return 0; conf->event_threads = new; - return event_reconfigure_threads(this->ctx->event_pool, - conf->event_threads); + return gf_event_reconfigure_threads(this->ctx->event_pool, + conf->event_threads); } int diff --git a/xlators/protocol/server/src/server.c b/xlators/protocol/server/src/server.c index 45a5e96e31a..f79fe26641d 100644 --- a/xlators/protocol/server/src/server.c +++ b/xlators/protocol/server/src/server.c @@ -699,7 +699,7 @@ server_check_event_threads(xlator_t *this, server_conf_t *conf, int32_t new) return 0; } - return event_reconfigure_threads(pool, target); + return gf_event_reconfigure_threads(pool, target); } int @@ -1005,7 +1005,7 @@ server_cleanup(xlator_t *this, server_conf_t *conf) if (this->ctx->event_pool) { /* Free the event pool */ - (void)event_pool_destroy(this->ctx->event_pool); + (void)gf_event_pool_destroy(this->ctx->event_pool); } if (dict_get_sizen(this->options, "config-directory")) { -- cgit