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[thirdparty/mdadm.git] / util.c

diff --git a/util.c b/util.c
index cc98d3badb33053d95532f719405e1e7548a668d..9ec4aefde8c1fb21ccf4d5ec8fe272cbefaf0a72 100644 (file)
--- a/util.c
+++ b/util.c
@@ -34,6 +34,15 @@
 #include       <ctype.h>
 #include       <dirent.h>
 #include       <signal.h>
+#include       <dlfcn.h>
+#include       <stdint.h>
+#ifdef NO_COROSYNC
+ typedef uint64_t cmap_handle_t;
+ #define CS_OK 1
+#else
+ #include      <corosync/cmap.h>
+#endif
+
 
 /*
  * following taken from linux/blkpg.h because they aren't
@@ -1976,3 +1985,51 @@ void reopen_mddev(int mdfd)
        if (fd >= 0 && fd != mdfd)
                dup2(fd, mdfd);
 }
+
+int get_cluster_name(char **cluster_name)
+{
+        void *lib_handle = NULL;
+        int rv = -1;
+
+        cmap_handle_t handle;
+        static int (*initialize)(cmap_handle_t *handle);
+        static int (*get_string)(cmap_handle_t handle,
+                                const char *string,
+                                char **name);
+        static int (*finalize)(cmap_handle_t handle);
+
+
+        lib_handle = dlopen("libcmap.so.4", RTLD_NOW | RTLD_LOCAL);
+        if (!lib_handle)
+                return rv;
+
+        initialize = dlsym(lib_handle, "cmap_initialize");
+        if (!initialize)
+                goto out;
+
+        get_string = dlsym(lib_handle, "cmap_get_string");
+        if (!get_string)
+                goto out;
+
+        finalize = dlsym(lib_handle, "cmap_finalize");
+        if (!finalize)
+                goto out;
+
+        rv = initialize(&handle);
+        if (rv != CS_OK)
+                goto out;
+
+        rv = get_string(handle, "totem.cluster_name", cluster_name);
+        if (rv != CS_OK) {
+                free(*cluster_name);
+                rv = -1;
+                goto name_err;
+        }
+
+        rv = 0;
+name_err:
+        finalize(handle);
+out:
+        dlclose(lib_handle);
+        return rv;
+}