socket: call init_openssl_mt() in init() and add cleanup

init_openssl_mt() wasn't explicitly invoked and was run implicitly before
dlopen() returned as it was tagged as __attribute__ ((constructor)). This
function used to call GF_CALLOC() which wasn't available or initialized
when socket.so is dlopen()ed by an external program. The program used to
crash with SIGSEGV as follows:

0x00007ffff5efe1ad in __gf_calloc (nmemb=41, size=40, type=158, typestr=0x7ffff63eb3d6 "gf_sock_mt_lock_array")
at mem-pool.c:109
0x00007ffff63e6acf in init_openssl_mt () at socket.c:4016
0x00007ffff7de90da in call_init.part () from /lib64/ld-linux-x86-64.so.2
0x00007ffff7de91eb in _dl_init () from /lib64/ld-linux-x86-64.so.2
0x00007ffff7dedde1 in dl_open_worker () from /lib64/ld-linux-x86-64.so.2
0x00007ffff7de8f84 in _dl_catch_error () from /lib64/ld-linux-x86-64.so.2
0x00007ffff7ded339 in _dl_open () from /lib64/ld-linux-x86-64.so.2

This change moves call to init_openssl_mt() from being a constructor function
to the init() function and introduces fini_openssl_mt() which cleans up
resources (called in destructor).

BUG: 1193929
Change-Id: Iab690897ec34e24c33f6b43f8d8d9f8fd75ac607
Signed-off-by: Prashanth Pai <ppai@redhat.com>
Reviewed-on: https://review.gluster.org/17753
Smoke: Gluster Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Jeff Darcy <jeff@pl.atyp.us>

0 files changed, 0 insertions, 0 deletions