lsetxattr XXX system.posix_acl_access= failed: Operation not supported

[Norbert Preining <norbert@preining.info>]

Hi all,

(please Cc!)

I am trying to send snapshots to my NAS using btrfs send/receive, and
often it fails with error messages always boiling down to
	lsetxattr SOME/PATH system.posix_acl_access= failed: Operation not supported
The local system is Arch Linux with btrfs-progs 5.16.1 and kernel
5.16.8.

The remote system is an Asustor NAS with btrfs-progs 5.6 and kernel 5.4.x
(no further specification found in config.gz etc).

What I have tried and checked is:
- update btrfs-progs to 5.16, still the same error
- CONFIG_BTRFS_FS_POSIX_ACL=y in /proc/config.gz

Is there another way around this besides mounting local fs with noacl?

I can update the btrfs-progs (since it is an x86_64 system I can compile
on an old Debian version so that libc is ok), but updating the kernel
is not possible (some firmware hackery would be necessary, and as far as
I know not been done by now).

Any pointer would be greatly appreciated.

(Please Cc)

Thanks and all the best

Norbert

--
PREINING Norbert                              https://www.preining.info
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