LU-16227 utils: Add warning for lfs setdirstripe -D -i x,y,z

[fs/lustre-release.git] / lustre / utils / lfs.c

diff --git a/lustre/utils/lfs.c b/lustre/utils/lfs.c
index 58890c8..ed90a6f 100644 (file)
--- a/lustre/utils/lfs.c
+++ b/lustre/utils/lfs.c
@@ -6641,6 +6641,7 @@ static int lfs_setdirstripe(int argc, char **argv)
        bool default_stripe = false;
        bool delete = false;
        bool foreign_mode = false;
+       bool mdt_count_set = false;
        mode_t mode = S_IRWXU | S_IRWXG | S_IRWXO;
        mode_t previous_mode = 0;
        char *xattr = NULL;
@@ -6703,6 +6704,7 @@ static int lfs_setdirstripe(int argc, char **argv)
                                        progname, optarg);
                                return CMD_HELP;
                        }
+                       mdt_count_set = true;
                        break;
                case 'd':
                        delete = true;
@@ -6929,6 +6931,15 @@ static int lfs_setdirstripe(int argc, char **argv)
                                lsa.lsa_stripe_count);
        }
 
+       if (default_stripe && lsa.lsa_nr_tgts > 1 && !mdt_count_set) {
+               fprintf(stderr,
+                       "%s %s: trying to create unrecommended default striped directory layout,\n"
+                       "       '-D -i x,y,z' will stripe every new directory across all MDTs,\n"
+                       "       add -c with the number of MDTs to do this anyway\n",
+                       progname, argv[0]);
+               return CMD_HELP;
+       }
+
        if (max_inherit_rr != LAYOUT_INHERIT_UNSET &&
            lsa.lsa_stripe_off != LLAPI_LAYOUT_DEFAULT &&
            lsa.lsa_stripe_off != LMV_OFFSET_DEFAULT) {