Avoid conflict between contrib/uuid and system uuid

glusterfs relies on Linux uuid implementation, which
API is incompatible with most other systems's uuid. As
a result, libglusterfs has to embed contrib/uuid,
which is the Linux implementation, on non Linux systems.
This implementation is incompatible with systtem's
built in, but the symbols have the same names.

Usually this is not a problem because when we link
with -lglusterfs, libc's symbols are trumped. However
there is a problem when a program not linked with
-lglusterfs will dlopen() glusterfs component. In
such a case, libc's uuid implementation is already
loaded in the calling program, and it will be used
instead of libglusterfs's implementation, causing
crashes.

A possible workaround is to use pre-load libglusterfs
in the calling program (using LD_PRELOAD on NetBSD for
instance), but such a mechanism is not portable, nor
is it flexible. A much better approach is to rename
libglusterfs's uuid_* functions to gf_uuid_* to avoid
any possible conflict. This is what this change attempts.

BUG: 1206587
Change-Id: I9ccd3e13afed1c7fc18508e92c7beb0f5d49f31a
Signed-off-by: Emmanuel Dreyfus <manu@netbsd.org>
Reviewed-on: http://review.gluster.org/10017
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/xlators/cluster/dht/src/dht-layout.c b/xlators/cluster/dht/src/dht-layout.c
index 15b183861a7..bbac904743e 100644
--- a/xlators/cluster/dht/src/dht-layout.c
+++ b/xlators/cluster/dht/src/dht-layout.c
@@ -667,7 +667,7 @@ dht_layout_normalize (xlator_t *this, loc_t *loc, dht_layout_t *layout)
                 goto out;
         }
 
-        uuid_unparse(loc->gfid, gfid);
+        gf_uuid_unparse(loc->gfid, gfid);
 
         ret = dht_layout_anomalies (this, loc, layout,
                                     &holes, &overlaps,
@@ -733,7 +733,7 @@ dht_layout_dir_mismatch (xlator_t *this, dht_layout_t *layout, xlator_t *subvol,
         char        gfid[GF_UUID_BUF_SIZE] = {0};
 
         if(loc && loc->inode)
-                uuid_unparse(loc->inode->gfid, gfid);
+                gf_uuid_unparse(loc->inode->gfid, gfid);
 
         for (idx = 0; idx < layout->cnt; idx++) {
                 if (layout->list[idx].xlator == subvol) {