Explicit UUID handling doesn't require blkid; factor out get_uuid_blkdev()

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Steve Dickson <steved@redhat.com>

diff --git a/utils/mountd/cache.c b/utils/mountd/cache.c
index 2ebdd45b2007be60923cb5343c73c40c8728ba42..23e2344559bb3bec48583c3a15d0187c44c03a3d 100644 (file)
--- a/utils/mountd/cache.c
+++ b/utils/mountd/cache.c
@@ -14,6 +14,7 @@
 #include <sys/types.h>
 #include <sys/select.h>
 #include <sys/stat.h>
+#include <sys/vfs.h>
 #include <time.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
@@ -167,6 +168,41 @@ void auth_unix_gid(FILE *f)
 }
 
 #if USE_BLKID
+static const char *get_uuid_blkdev(char *path)
+{
+       static blkid_cache cache = NULL;
+       struct stat stb;
+       char *devname;
+       blkid_tag_iterate iter;
+       blkid_dev dev;
+       const char *type;
+       const char *val = NULL;
+
+       if (cache == NULL)
+               blkid_get_cache(&cache, NULL);
+
+       if (stat(path, &stb) != 0)
+               return NULL;
+       devname = blkid_devno_to_devname(stb.st_dev);
+       if (!devname)
+               return NULL;
+       dev = blkid_get_dev(cache, devname, BLKID_DEV_NORMAL);
+       free(devname);
+       if (!dev)
+               return NULL;
+       iter = blkid_tag_iterate_begin(dev);
+       if (!iter)
+               return NULL;
+       while (blkid_tag_next(iter, &type, &val) == 0)
+               if (strcmp(type, "UUID") == 0)
+                       break;
+       blkid_tag_iterate_end(iter);
+       return val;
+}
+#else
+#define get_uuid_blkdev(path) (NULL)
+#endif
+
 int get_uuid(char *path, char *uuid, int uuidlen, char *u)
 {
        /* extract hex digits from uuidstr and compose a uuid
@@ -174,35 +210,12 @@ int get_uuid(char *path, char *uuid, int uuidlen, char *u)
         * a smaller uuid.  Then compare with uuid
         */
        int i = 0;
-       const char *val;
+       const char *val = NULL;
+       char fsid_val[17];
 
        if (path) {
-               static blkid_cache cache = NULL;
-               struct stat stb;
-               char *devname;
-               blkid_tag_iterate iter;
-               blkid_dev dev;
-               const char *type;
-               if (cache == NULL)
-                       blkid_get_cache(&cache, NULL);
-
-               if (stat(path, &stb) != 0)
-                       return 0;
-               devname = blkid_devno_to_devname(stb.st_dev);
-               if (!devname)
-                       return 0;
-               dev = blkid_get_dev(cache, devname, BLKID_DEV_NORMAL);
-               free(devname);
-               if (!dev)
-                       return 0;
-               iter = blkid_tag_iterate_begin(dev);
-               if (!iter)
-                       return 0;
-               while (blkid_tag_next(iter, &type, &val) == 0)
-                       if (strcmp(type, "UUID") == 0)
-                               break;
-               blkid_tag_iterate_end(iter);
-               if (!type)
+               val = get_uuid_blkdev(path);
+               if (!val)
                        return 0;
        } else {
                val = uuid;
@@ -229,7 +242,6 @@ 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
@@ -439,20 +451,15 @@ 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);
-                               else if (get_uuid(path, NULL,
-                                                 uuidlen, u) == 0)
+                               else if (get_uuid(path, NULL, uuidlen, u) == 0)
                                        continue;
 
                                if (memcmp(u, fhuuid, uuidlen) != 0)
                                        continue;
                                break;
-#else
-                               continue;
-#endif
                        }
                        if (use_ipaddr) {
                                if (he == NULL) {
@@ -584,7 +591,6 @@ static int dump_to_cache(FILE *f, char *domain, char *path, struct exportent *ex
                qword_printint(f, exp->e_fsid);
                write_fsloc(f, exp, path);
                write_secinfo(f, exp);
-#if USE_BLKID
                if (exp->e_uuid == NULL || different_fs) {
                        char u[16];
                        if (get_uuid(path, NULL, 16, u)) {
@@ -597,7 +603,6 @@ static int dump_to_cache(FILE *f, char *domain, char *path, struct exportent *ex
                        qword_print(f, "uuid");
                        qword_printhex(f, u, 16);
                }
-#endif
        }
        return qword_eol(f);
 }