LU-11546 utils: enable large_dir for ldiskfs

Format MDT with "large_dir" option by default,
to get over the 10M-entry limit for the directories.

Lustre-change: https://review.whamcloud.com/36555
Lustre-commit: cd1faa0124f21e12a5ecd83c709c13918264fc86

Signed-off-by: Li Dongyang <dongyangli@ddn.com>
Change-Id: Ie51e6ce28b5f00adc9958de24794a760d9b43b77
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Artem Blagodarenko <c17828@cray.com>
Reviewed-by: Stephan Thiell <sthiell@stanford.edu>
Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/36781
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Artem Blagodarenko <artem.blagodarenko@hpe.com>
Tested-by: Maloo <maloo@whamcloud.com>

diff --git a/lustre/utils/libmount_utils_ldiskfs.c b/lustre/utils/libmount_utils_ldiskfs.c
index 2a3088b..5dd0d3a 100644 (file)
--- a/lustre/utils/libmount_utils_ldiskfs.c
+++ b/lustre/utils/libmount_utils_ldiskfs.c
@@ -599,6 +599,10 @@ static int enable_default_ext4_features(struct mkfs_opts *mop, char *anchor,
        if (enable_64bit)
                append_unique(anchor, ",", "64bit", NULL, maxbuflen);
 
+       /* Allow more than 10M directory entries */
+       if (is_e2fsprogs_feature_supp("-O large_dir") == 0)
+               append_unique(anchor, ",", "large_dir", NULL, maxbuflen);
+
        /* Cluster inode/block bitmaps and inode table for more efficient IO.
         * Align the flex groups on a 1MB boundary for better performance. */
        /* This -O feature needs to go last, since it adds the "-G" option. */