linux-kernel - [bcachefs] [bug]: missing subvolume 0

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Date:   Mon, 4 Dec 2023 12:03:26 +0100
From:   Donald Buczek <buczek@...gen.mpg.de>
To:     Kent Overstreet <kent.overstreet@...ux.dev>,
        Brian Foster <bfoster@...hat.com>,
        linux-bcachefs@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:     Stefan Krueger <stefan.krueger@....mpg.de>
Subject: [bcachefs] [bug]: missing subvolume 0

Reporting to maintainer.pl list, hope that's correct?

Probably, this is a trivial one:
Linux 6.7.0-rc4.

buczek@...e:~$ sudo bcachefs format /dev/vdb
External UUID:                              d5181483-dc0c-4781-a266-ef830fa3c099
Internal UUID:                              d96e4b19-43f3-4a5b-bc5c-3fe2b726b1ef
[...]
buczek@...e:~$ sudo bcachefs mount /dev/vdb /mnt
buczek@...e:~$ sudo chmod a=rwxt /mnt
buczek@...e:~$ mkdir /mnt/d
buczek@...e:~$ bcachefs subvolume snapshot /mnt/d/snp1
BCH_IOCTL_SUBVOLUME_CREATE ioctl error: No such file or directory
buczek@...e:~$ dmesg|tail -10
[ 7477.587299] bcachefs (vdb): mounting version 1.3: rebalance_work
[ 7477.589134] bcachefs (vdb): recovering from clean shutdown, journal seq 14
[ 7477.608861] bcachefs (vdb): alloc_read... done
[ 7477.610525] bcachefs (vdb): stripes_read... done
[ 7477.612037] bcachefs (vdb): snapshots_read... done
[ 7477.644331] bcachefs (vdb): journal_replay... done
[ 7477.645940] bcachefs (vdb): resume_logged_ops... done
[ 7477.650087] bcachefs (vdb): going read-write
[ 7514.113568] bcachefs (vdb): missing subvolume 0
[ 7514.115121] bcachefs (vdb): inconsistency detected - emergency read only
buczek@...e:~$



Best
   Donald

-- 
Donald Buczek
buczek@...gen.mpg.de
Tel: +49 30 8413 1433