On Mon, Aug 07, 2017 at 12:31:38PM -0700, Eric Biggers wrote: > On Mon, Aug 07, 2017 at 09:49:42AM -0400, Theodore Ts'o wrote: > > On Mon, Aug 07, 2017 at 05:51:26PM +0800, Dai Xiang wrote: > > > On Mon, Aug 07, 2017 at 11:25:02AM +0800, Dai Xiang wrote: > > > > Hi! > > > > > > > > I use xfstests with ext4 fs to test, and i found a skip: > > > > > > > > ext4/024 [not run] kernel does not support ext4 encryption > > > > Yeah, the message printed is misleading, and should be fixed. > > Checking to see whether the kernel supports encryption can be done by > > checking for the existence of the file: > > > > /sys/fs/ext4/features/encryption > > > > > i print the cmd: > > > /usr/sbin/xfs_io -i -c set_encpolicy /fs/scratch/tmpdir > > > /fs/scratch/tmpdir: failed to set encryption policy: Inappropriate > > > ioctl for device <=== > > > > > > Seems do not related to kconfig? > > > > Yes, the issue is that you need to create the file system (or set via > > tune2fs) the feature flag "encrypt". To best test the read/write > > paths, you should set the mount option test_dummy_encryption. The > > kvm-xfstests and gce-xfstests framework do all of this automatically. > > From xfstests-bld/kvm-xfstests/test-appliance/files/root/cfg/fs/ext4/encrypt: > > > > SIZE=small > > export EXT_MKFS_OPTIONS="-O encrypt" > > export EXT_MOUNT_OPTIONS="test_dummy_encryption" > > REQUIRE_FEATURE=encryption > > TESTNAME="Ext4 encryption" > > > > There are a number tests that are known to fail; primarily having to > > do with quota support, which doesn't play well with > > test_dummy_encryption (that's more of a test problem than anything > > else). See the encrypt.exclude file in that directory for more > > details. > > > > Actually, this is one of the tests in the "encrypt" group, which format the > scratch device with "-O encrypt". So I believe the printed message is correct. > Are you 100% sure that CONFIG_EXT4_ENCRYPTION is enabled in your kernel config > and that you are running the correct kernel? I use v4.13-rc3 kernerl, and i find this info refer to https://wiki.archlinux.org/index.php/ext4#Using_file-based_encryption: Ext4 forbids encrypting the root (/) directory and will produce an error on kernel 4.13 and later Does it impact? > > Eric
