From 8e64355493df4a0d2914b11a75ce80deeea27aca Mon Sep 17 00:00:00 2001
From: Neil Brown <neilb@suse.de>
Date: Tue, 20 Mar 2007 11:47:28 +1100
Subject: [PATCH] Allow disabling of libblkid usage.

Some versions of libblkid have a terrible memory leak which makes
mounted grow toooo big.  So support
   --disable-uuid
to remove the uuid functionality and liblkid with it.
---
 configure.in         | 11 +++++++++--
 utils/mountd/cache.c | 10 ++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/configure.in b/configure.in
index 1240656..ce5e2a0 100644
--- a/configure.in
+++ b/configure.in
@@ -125,6 +125,11 @@ AC_ARG_WITH(rpcgen,
 	RPCGEN_PATH= )
 	AC_SUBST(RPCGEN_PATH)
 	AM_CONDITIONAL(CONFIG_RPCGEN, [test "$RPCGEN_PATH" == ""])
+AC_ARG_ENABLE(uuid,
+	[AC_HELP_STRING([--without-uuid], [Exclude uuid support and so avoid possibly buggy libblkid])],
+	if test "$enableval" = "yes" ; then use_blkid=1; else use_blkid=0; fi,
+	use_blkid=1)
+	AC_DEFINE_UNQUOTED(USE_BLKID, $use_blkid, [Define if you want to use blkid to find uuid of filesystems])
 AC_ARG_ENABLE(mount,
 	[AC_HELP_STRING([--enable-mount],
 			[Create mount.nfs and don't use the util-linux mount(8) functionality. @<:@default=no@:>@])],
@@ -196,8 +201,10 @@ fi
 if test "$knfsd_cv_glibc2" = no; then
     AC_CHECK_LIB(bsd, daemon, [LIBBSD="-lbsd"])
 fi
-AC_CHECK_LIB(blkid, blkid_get_cache, [LIBBLKID="-lblkid"], AC_MSG_ERROR([libblkid needed]))
-AC_CHECK_HEADER(blkid/blkid.h, , AC_MSG_ERROR([Cannot file libblkid header file blkid/blkid.h]))
+if test "$use_blkid" = 1; then
+   AC_CHECK_LIB(blkid, blkid_get_cache, [LIBBLKID="-lblkid"], AC_MSG_ERROR([libblkid needed]))
+   AC_CHECK_HEADER(blkid/blkid.h, , AC_MSG_ERROR([Cannot file libblkid header file blkid/blkid.h]))
+fi
 AC_SUBST(LIBSOCKET)
 AC_SUBST(LIBCRYPT)
 AC_SUBST(LIBBSD)
diff --git a/utils/mountd/cache.c b/utils/mountd/cache.c
index fb2a8e7..e8d72fa 100644
--- a/utils/mountd/cache.c
+++ b/utils/mountd/cache.c
@@ -31,7 +31,9 @@
 #include "xmalloc.h"
 #include "fsloc.h"
 
+#ifdef USE_BLKID
 #include "blkid/blkid.h"
+#endif
 
 
 enum nfsd_fsid {
@@ -152,6 +154,7 @@ void auth_unix_gid(FILE *f)
 		free(groups);
 }
 
+#if USE_BLKID
 int get_uuid(char *path, char *uuid, int uuidlen, char *u)
 {
 	/* extract hex digits from uuidstr and compose a uuid
@@ -216,6 +219,7 @@ int get_uuid(char *path, char *uuid, int uuidlen, char *u)
 	}
 	return 1;
 }
+#endif
 
 /* Iterate through /etc/mtab, finding mountpoints
  * at or below a given path
@@ -418,6 +422,7 @@ void nfsd_fh(FILE *f)
 				if (!is_mountpoint(path))
 					continue;
 			check_uuid:
+#if USE_BLKID
 				if (exp->m_export.e_uuid)
 					get_uuid(NULL, exp->m_export.e_uuid,
 						 uuidlen, u);
@@ -428,6 +433,9 @@ void nfsd_fh(FILE *f)
 				if (memcmp(u, fhuuid, uuidlen) != 0)
 					continue;
 				break;
+#else
+				continue;
+#endif
 			}
 			/* It's a match !! */
 			if (!found) {
@@ -517,6 +525,7 @@ static int dump_to_cache(FILE *f, char *domain, char *path, struct exportent *ex
 		qword_printint(f, exp->e_anongid);
 		qword_printint(f, exp->e_fsid);
 		write_fsloc(f, exp, path);
+#if USE_BLKID
  		if (exp->e_uuid == NULL) {
  			char u[16];
  			if (get_uuid(path, NULL, 16, u)) {
@@ -527,6 +536,7 @@ static int dump_to_cache(FILE *f, char *domain, char *path, struct exportent *ex
  			qword_print(f, "uuid");
  			qword_printhex(f, exp->e_uuid, 16);
  		}
+#endif
 	}
 	return qword_eol(f);
 }
-- 
2.39.2