gfapi: prevent mem-pool leak in case glfs_new_fs() fails

Commit 7039243e187 adds a call to mem_pools_init() so that the memory
pool cleanup thread ("sweeper") is started. However, now it is possible
that users of gfapi can not cleanup this thread because glfs_new() can
return NULL, but the sweeper is still running.

In case glfs_fs_new() fails, mem_pools_fini() needs to be called as
well. This seems more correct than calling mem_pools_init() after
glfs_fs_new(), and this makes using memory pools possible *really* early
in the gfapi initialization.

Change-Id: I1f2fb25cc33e227b3c33ce9d1b03f67bc27e981a
Fixes: 7039243e187 ("gfapi: add mem_pools_init and mem_pools_fini calls")
BUG: 1468863
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: https://review.gluster.org/17734
Reviewed-by: Jeff Darcy <jeff@pl.atyp.us>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: soumya k <skoduri@redhat.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>

1 files changed, 21 insertions, 12 deletions

diff --git a/api/src/glfs.c b/api/src/glfs.c
index 0eb25a222de..25eaabb066c 100644
--- a/api/src/glfs.c
+++ b/api/src/glfs.c
@@ -753,45 +753,54 @@ pub_glfs_new (const char *volname)
 
         fs = glfs_new_fs (volname);
         if (!fs)
-                return NULL;
+                goto out;
 
         ctx = glusterfs_ctx_new ();
         if (!ctx)
-                goto fini;
+                goto out;
 
         /* first globals init, for gf_mem_acct_enable_set () */
 
         ret = glusterfs_globals_init (ctx);
         if (ret)
-                goto fini;
+                goto out;
 
         old_THIS = THIS;
         ret = glfs_init_global_ctx ();
         if (ret)
-                goto fini;
+                goto out;
 
         /* then ctx_defaults_init, for xlator_mem_acct_init(THIS) */
 
         ret = glusterfs_ctx_defaults_init (ctx);
         if (ret)
-                goto fini;
+                goto out;
 
         fs->ctx = ctx;
 
         ret = glfs_set_logging (fs, "/dev/null", 0);
         if (ret)
-                goto fini;
+                goto out;
 
         fs->ctx->cmd_args.volfile_id = gf_strdup (volname);
-        if (!(fs->ctx->cmd_args.volfile_id))
-                goto fini;
+        if (!(fs->ctx->cmd_args.volfile_id)) {
+                ret = -1;
+                goto out;
+        }
 
-        goto out;
+        ret = 0;
 
-fini:
-         glfs_fini (fs);
-         fs = NULL;
 out:
+        if (ret) {
+                if (fs) {
+                        glfs_fini (fs);
+                        fs = NULL;
+                } else {
+                        /* glfs_fini() calls mem_pools_fini() too */
+                        mem_pools_fini ();
+                }
+        }
+
         if (old_THIS)
                 THIS = old_THIS;