rbd: document --order and list required args where they're necessary

Signed-off-by: Josh Durgin <josh.durgin@dreamhost.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/rbd.cc b/src/rbd.cc
index d0c3906e778..97573894ca1 100644
--- a/src/rbd.cc
+++ b/src/rbd.cc
@@ -66,10 +66,8 @@ void usage()
        << "  <ls | list> [pool-name]                   list rbd images\n"
        << "  info <--snap=name> [image-name]           show information about image size,\n"
        << "                                            striping, etc.\n"
-       << "  create [image-name]                       create an empty image (requires size\n"
-       << "                                            param)\n"
-       << "  resize [image-name]                       resize (expand or contract) image\n"
-       << "                                            (requires size param)\n"
+       << "  create <--order=bits> [--size MB] [name]  create an empty image\n"
+       << "  resize [--size MB] [image-name]           resize (expand or contract) image\n"
        << "  rm [image-name]                           delete an image\n"
        << "  export <--snap=name> [image-name] [path]  export image to file\n"
        << "  import [path] [dst-image]                 import image from file (dest defaults\n"
@@ -94,6 +92,8 @@ void usage()
        << "  --dest-pool <name>           destination pool name\n"
        << "  --path <path-name>           path name for import/export (if not specified)\n"
        << "  --size <size in MB>          size parameter for create and resize commands\n"
+       << "  --order <bits>               the object size in bits, such that the objects\n"
+       << "                               are (1 << order) bytes. Default is 22 (4 MB).\n"
        << "\n"
        << "For the map command:\n"
        << "  --user <username>            rados user to authenticate as\n"