From bab08ab9646288f1b0b72a7aaeecdff94bd62c18 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Fri, 9 Sep 2011 18:36:51 -0400 Subject: ext4: enforce bigalloc restrictions (e.g., no online resizing, etc.) At least initially if the bigalloc feature is enabled, we will not support non-extent mapped inodes, online resizing, online defrag, or the FITRIM ioctl. This simplifies the initial implementation. Signed-off-by: "Theodore Ts'o" --- fs/ext4/super.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'fs/ext4/super.c') diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 823e7d9deee..25a4bfe3f39 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2701,6 +2701,13 @@ static int ext4_feature_set_ok(struct super_block *sb, int readonly) return 0; } } + if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && + !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { + ext4_msg(sb, KERN_ERR, + "Can't support bigalloc feature without " + "extents feature\n"); + return 0; + } return 1; } -- cgit v1.2.3-18-g5258