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From:   Krzysztof Kozlowski <krzk@kernel.org>
Date:   Tue, 11 Dec 2018 15:15:53 +0100
Message-ID: <CAJKOXPdNS+Qs6t1GwrgYhWT5EbtORJwYMzSrDPf8oAxv7ndNBg@mail.gmail.com>
Subject: [BUG BISECT next] Files cannot be opened after "fsverity: Move verity
 status check to fsverity_file_open"
To:     Chandan Rajendra <chandan@linux.vnet.ibm.com>,
        "Theodore Ts'o" <tytso@mit.edu>,
        Andreas Dilger <adilger.kernel@dilger.ca>,
        Jaegeuk Kim <jaegeuk@kernel.org>, Chao Yu <yuchao0@huawei.com>,
        Eric Biggers <ebiggers@kernel.org>, linux-ext4@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        linux-f2fs-devel@lists.sourceforge.net,
        linux-fscrypt@vger.kernel.org
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Sender: linux-kernel-owner@vger.kernel.org
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Hi,

Bisect from today's next pointed me to:
commit 4de97efb578a094e8fbf279522d41eb9ece1e3e0
Author: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Date:   Sat Dec 8 12:21:43 2018 +0530
    fsverity: Move verity status check to fsverity_file_open

as a reason of "Operation not supported" when reading any file from
mounted ext4fs (from SD card). Rootfs from nfsroot works but reading
from /home with ext4fs fails.

Mounts:
192.168.1.10:/srv/nfs/odroidhc1 on / type nfs4
(rw,relatime,vers=4.0,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=192.168.1.12,local_lock=none,addr=192.168.1.10)
/dev/mmcblk0p2 on /home type ext4 (rw,relatime)

Configuration:
1. Arch ARM Linux
2. exynos_defconfig
  - All my Odroid boards (ARMv7, Exynos)
    Systemd: v239, v238
3. All boards boot from TFTP with NFS root (NFSv4)
No specific errors in boot log:
https://krzk.eu/#/builders/21/builds/1034/steps/12/logs/serial0

Let me know if you need any more data.

Best regards,
Krzysztof