Bug#1114898: NFSv4.2 reports "Operation Not Supported" on getxattr calls

From	Brad Barnett <debian-bugs5@L8R.net>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1114898: NFSv4.2 reports "Operation Not Supported" on getxattr calls
Date	2025-09-11 13:10 +0200
Message-ID	<LtNlD-evqW-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Package: linux-image-amd64
Version: 6.12.43-1

NFSv4.2 reports "Operation Not Supported" on getxattr calls.

The following is with the same NFS backend, and same mount options.  The
NFS server reports name: "Linux NFSv4.2 [an identifier]" under 
/proc/fs/nfsd/clients/*/info for both clients.

Bookworm:

# touch testfile
# setfattr -h -n user.test -v yes testfile
# getfattr -h -n user.test testfile
# file: testfile
user.test="yes"

Trixie:

# setfattr -h -n user.test -v yes testfile
setfattr: testfile: Operation not supported

# getfattr -h -n user.test testfile
testfile: user.test: Operation not supported

There seems to be a regression in set/getxattr handling in 6.12 and other
branches.  This may be helpful:

https://marc.info/?l=linux-nfs&m=175643910429853&w=2

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Bug#1114898: NFSv4.2 reports "Operation Not Supported" on getxattr calls Brad Barnett <debian-bugs5@L8R.net> - 2025-09-11 13:10 +0200
  Bug#1114898: Acknowledgement (NFSv4.2 reports "Operation Not Supported" on getxattr calls) Brad Barnett <bugs5@L8R.net> - 2025-09-13 12:10 +0200
  Bug#1114898: marked as done (NFSv4.2 reports "Operation Not  Supported" on getxattr calls) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-09-21 10:20 +0200
  Bug#1114898: marked as done (NFSv4.2 reports "Operation Not  Supported" on getxattr calls) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-10-14 10:10 +0200

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