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.

Backport of:
> https://review.gluster.org/#/c/glusterfs/+/23110/
> Change-Id: I38f0200b941bd1cff4bf3066fca2fc1f9a5263aa
> Fixes: #699
> Signed-off-by: Xiubo Li <xiubli@redhat.com>

Change-Id: I38f0200b941bd1cff4bf3066fca2fc1f9a5263aa
updates: bz#1740525
Signed-off-by: Xiubo Li <xiubli@redhat.com>
(cherry picked from commit 799edc73c3d4f694c365c6a7c27c9ab8eed5f260)

2 files changed, 6 insertions, 6 deletions

diff --git a/cli/src/cli-rl.c b/cli/src/cli-rl.c
index b6f87b189aa..7a38a0b882a 100644
--- a/cli/src/cli-rl.c
+++ b/cli/src/cli-rl.c
@@ -112,7 +112,7 @@ cli_rl_stdin(int fd, int idx, int gen, void *data, int poll_out, int poll_in,
 
     rl_callback_read_char();
 
-    event_handled(state->ctx->event_pool, fd, idx, gen);
+    gf_event_handled(state->ctx->event_pool, fd, idx, gen);
 
     return;
 }
@@ -379,8 +379,8 @@ cli_rl_enable(struct cli_state *state)
         goto out;
     }
 
-    ret = event_register(state->ctx->event_pool, 0, cli_rl_stdin, state, 1, 0,
-                         0);
+    ret = gf_event_register(state->ctx->event_pool, 0, cli_rl_stdin, state, 1,
+                            0, 0);
     if (ret == -1)
         goto out;
 
diff --git a/cli/src/cli.c b/cli/src/cli.c
index a2c4496a5d8..8a3f02dff15 100644
--- a/cli/src/cli.c
+++ b/cli/src/cli.c
@@ -122,8 +122,8 @@ glusterfs_ctx_defaults_init(glusterfs_ctx_t *ctx)
         goto out;
     }
 
-    ctx->event_pool = event_pool_new(DEFAULT_EVENT_POOL_SIZE,
-                                     STARTING_EVENT_THREADS);
+    ctx->event_pool = gf_event_pool_new(DEFAULT_EVENT_POOL_SIZE,
+                                        STARTING_EVENT_THREADS);
     if (!ctx->event_pool) {
         gf_log("cli", GF_LOG_ERROR, "Failed to create event pool.");
         goto out;
@@ -863,7 +863,7 @@ main(int argc, char *argv[])
     if (ret)
         goto out;
 
-    ret = event_dispatch(ctx->event_pool);
+    ret = gf_event_dispatch(ctx->event_pool);
 
 out:
     //        glusterfs_ctx_destroy (ctx);