From 492fc4482815cb59f7312e1c6645ff36a8b76fb2 Mon Sep 17 00:00:00 2001 From: David Sterba Date: Thu, 14 Nov 2013 14:30:45 +0100 Subject: btrfs-progs: mkfs: extend -O syntax to disable features A way of disabling features that are on by default in case it's not wanted, eg. due to lack of support in the used kernel. Signed-off-by: David Sterba Signed-off-by: Chris Mason --- mkfs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/mkfs.c b/mkfs.c index cd0af9ef..f825e1b6 100644 --- a/mkfs.c +++ b/mkfs.c @@ -1168,7 +1168,11 @@ static int parse_one_fs_feature(const char *name, u64 *flags) int found = 0; for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) { - if (!strcmp(mkfs_features[i].name, name)) { + if (name[0] == '^' && + !strcmp(mkfs_features[i].name, name + 1)) { + *flags &= ~ mkfs_features[i].flag; + found = 1; + } else if (!strcmp(mkfs_features[i].name, name)) { *flags |= mkfs_features[i].flag; found = 1; } -- cgit v1.2.3