Create version-4 bitmaps if kernel supports it.

[thirdparty/mdadm.git] / Grow.c

diff --git a/Grow.c b/Grow.c
index 91278e8ddaa4699ec1eb5b370c2fdadb6fd38d0b..aa14638a1c14fb6a44df267ca99758e49d6f35ab 100644 (file)
--- a/Grow.c
+++ b/Grow.c
@@ -206,6 +206,16 @@ int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int
        mdu_bitmap_file_t bmf;
        mdu_array_info_t array;
        struct supertype *st;
+       int major = BITMAP_MAJOR_HI;
+       int vers = md_get_version(fd);
+
+       if (vers < 9003) {
+               major = BITMAP_MAJOR_HOSTENDIAN;
+#ifdef __BIG_ENDIAN
+               fprintf(stderr, Name ": Warning - bitmaps created on this kernel are not portable\n"
+                       "  between different architectured.  Consider upgrading the Linux kernel.\n");
+#endif
+       }
 
        if (ioctl(fd, GET_BITMAP_FILE, &bmf) != 0) {
                if (errno == ENOMEM) 
@@ -275,7 +285,7 @@ int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int
                                if (st->ss->load_super(st, fd2, &super, NULL)==0) {
                                        st->ss->add_internal_bitmap(st, super,
                                                                    chunk, delay, write_behind,
-                                                                   &array.size, 0);
+                                                                   &array.size, 0, major);
                                        st->ss->write_bitmap(st, fd2, super);
                                }
                                close(fd2);
@@ -322,7 +332,7 @@ int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int
                        return 1;
                }
                if (CreateBitmap(file, 0, (char*)uuid, chunk,
-                                delay, write_behind, array.size*2ULL)) {
+                                delay, write_behind, array.size*2ULL, major)) {
                        return 1;
                }
                bitmap_fd = open(file, O_RDWR);