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NFSD: Add a Kconfig setting to enable support for NFSv4 POSIX ACLs

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A new IETF draft extends NFSv4.2 with POSIX ACL attributes:

  https://www.ietf.org/archive/id/draft-ietf-nfsv4-posix-acls-00.txt

This draft has not yet been ratified. A build-time configuration
option allows developers and distributors to decide whether to
expose this experimental protocol extension to NFSv4 clients. The
option is disabled by default to prevent unintended deployment of
potentially unstable protocol features in production environments.

This approach mirrors the existing NFSD_V4_DELEG_TIMESTAMPS option,
which gates another experimental NFSv4 extension based on an
unratified IETF draft.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2026-01-09 11:21:31 -05:00
parent 6bc85baba4
commit feb8a46b14
1 changed files with 19 additions and 0 deletions
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19
fs/nfsd/Kconfig
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@ -186,3 +186,22 @@ config NFSD_V4_DELEG_TIMESTAMPS
draft-ietf-nfsv4-delstid-08 "Extending the Opening of Files". This
is currently an experimental feature and is therefore left disabled
by default.
config NFSD_V4_POSIX_ACLS
bool "Support NFSv4 POSIX draft ACLs"
depends on NFSD_V4
default n
help
Include experimental support for POSIX Access Control Lists
(ACLs) in NFSv4 as specified in the IETF draft
draft-ietf-nfsv4-posix-acls. This protocol extension enables
NFSv4 clients to retrieve and modify POSIX ACLs on exported
filesystems that support them.
This feature is based on an unratified IETF draft
specification that may change in ways that impact
interoperability with existing clients. Enable only for
testing environments or when interoperability with specific
clients that implement this draft is required.
If unsure, say N.