Grow: report if a --size change has no effect.

e.g. if "--grow --size=max" doesn't actually change anything, it is
useful to report that.

Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/Grow.c b/Grow.c
index e09e9ab30fe928e1f2053428331e8d0557807274..41dc9c91c89fb48a32855cb30f89fe7feba9f64e 100644 (file)
--- a/Grow.c
+++ b/Grow.c
@@ -1437,9 +1437,12 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
 
        /* ========= set size =============== */
        if (size >= 0 && (size == 0 || size != array.size)) {
-               long long orig_size = array.size;
+               long long orig_size = get_component_size(fd)/2;
                struct mdinfo *mdi;
 
+               if (orig_size == 0)
+                       orig_size = array.size;
+
                if (reshape_super(st, size, UnSet, UnSet, 0, 0, UnSet, NULL,
                                  devname, !quiet)) {
                        rv = 1;
@@ -1486,9 +1489,16 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
                size = get_component_size(fd)/2;
                if (size == 0)
                        size = array.size;
-               if (!quiet)
-                       fprintf(stderr, Name ": component size of %s has been set to %lluK\n",
-                               devname, size);
+               if (!quiet) {
+                       if (size == orig_size)
+                               fprintf(stderr, Name ": component size of %s "
+                                       "unchanged at %lluK\n",
+                                       devname, size);
+                       else
+                               fprintf(stderr, Name ": component size of %s "
+                                       "has been set to %lluK\n",
+                                       devname, size);
+               }
                changed = 1;
        } else if (array.level != LEVEL_CONTAINER) {
                size = get_component_size(fd)/2;