Status from old attempts to solve same nature issues: ----
Older (2018) merge request from @raharper: https://github.com/koverstreet/bcache-tools/pull/1 addressing the fact that kernel uevents would not always emit CACHED_UUID parameters, making udev to delete (whenever that happens) /dev/bcache/{by-uuid,by-label} symlinks. This last MR pointed to previous related bugs: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=890446 https://bugs.launchpad.net/curtin/+bug/1728742 And to an upstream kernel patch: https://lore.kernel.org/patchwork/patch/921298/ to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1729145 that wasn't accepted upstream. Even not being accepted upstream, the SRU was attempted: LP: #1729145 https://lists.ubuntu.com/archives/kernel-team/2017-December/088680.html https://lists.ubuntu.com/archives/kernel-team/2017-December/088679.html Both were NACKED. Attempted again: https://lists.ubuntu.com/archives/kernel-team/2017-December/088682.html https://lists.ubuntu.com/archives/kernel-team/2017-December/088683.html NACKED again. And a v2 was sent: https://lists.ubuntu.com/archives/kernel-team/2017-December/088751.html https://lists.ubuntu.com/archives/kernel-team/2017-December/088750.html https://lists.ubuntu.com/archives/kernel-team/2017-December/088749.html and acked in January 2018 by Coling: https://lists.ubuntu.com/archives/kernel-team/2018-January/089492.html but not upstreamed. BIONIC contains the fix: commit ed9333e1b583 Author: Ryan Harper <[email protected]> Date: Mon Dec 11 12:12:01 2017 UBUNTU: SAUCE: (no-up) bcache: decouple emitting a cached_dev CHANGE uevent BugLink: http://bugs.launchpad.net/bugs/1729145 - decouple emitting a cached_dev CHANGE uevent which includes dev.uuid and dev.label from bch_cached_dev_run() which only happens when a bcacheX device is bound to the actual backing block device (bcache0 -> vdb) - update bch_cached_dev_run() to invoke bch_cached_dev_emit_change() as needed; no functional code path changes here - Modify register_bcache to detect a re-registering of a bcache cached_dev, and in that case call bcache_cached_dev_emit_change() to Signed-off-by: Ryan Harper <[email protected]> Signed-off-by: Joseph Salisbury <[email protected]> Acked-by: Colin Ian King <[email protected]> Acked-by: Stefan Bader <[email protected]> Signed-off-by: Khalid Elmously <[email protected]> [ saf: fix incorrect indentation ] Signed-off-by: Seth Forshee <[email protected]> FOCAL contains the fix: commit 67553dcd7905 Author: Ryan Harper <[email protected]> Date: Mon Dec 11 12:12:01 2017 UBUNTU: SAUCE: (no-up) bcache: decouple emitting a cached_dev CHANGE uevent GROOVY contains the fix: commit 67553dcd7905 Author: Ryan Harper <[email protected]> Date: Mon Dec 11 12:12:01 2017 UBUNTU: SAUCE: (no-up) bcache: decouple emitting a cached_dev CHANGE uevent ---- So, the kernel patch wasn't accepted, nor bcache-tools patch by @raharper, the bcache-export-cached. ---- New Upstream summary from @raharper: https://github.com/systemd/systemd/pull/16317#issuecomment-655647313 in the upstream merge request made by @rbalint. ** Bug watch added: Debian Bug tracker #890446 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=890446 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1861941 Title: bcache by-uuid links disappear after mounting bcache0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bcache-tools/+bug/1861941/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
