On Wed, Nov 14, 2018 at 3:17 PM, Vivek Goyal <vgoyal@xxxxxxxxxx> wrote: > On Wed, Nov 14, 2018 at 04:01:34PM +0200, Amir Goldstein wrote: >> Theodore Ts'o reported a v4.19 regression with docker-dropbox: >> https://marc.info/?l=linux-fsdevel&m=154070089431116&w=2 >> >> "I was rebuilding my dropbox Docker container, and it failed in 4.19 >> with the following error: >> ... >> dpkg: error: error creating new backup file \ >> '/var/lib/dpkg/status-old': Invalid cross-device link" >> >> The problem did not reproduce with metacopy feature disabled. >> The error was caused by insufficient credentials to set >> "trusted.overlay.redirect" xattr on link of a metacopy file. >> > > Thanks Amir for fixiing this. This fix looks good to me. > > Acked-by: Vivek Goyal <vgoyal@xxxxxxxxxx> > > So this problem happened because looks like kernel enanbled metacopy > by default (in Kconfig) and thence enabled redirect by default in Kconfig. OVERLAY_FS_METACOPY is off by default. So it seems people explicitly enable it, because it sounds useful :) Thanks, Miklos
