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NFSD: Add nfsd4_encode_fattr4_acl_trueform_scope

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The FATTR4_ACL_TRUEFORM_SCOPE attribute indicates the granularity at
which the ACL model can vary: per file object, per file system, or
uniformly across the entire server.

In Linux, the ACL model is determined by the SB_POSIXACL superblock
flag, which applies uniformly to all files within a file system.
Different exported file systems can have different ACL models, but
individual files cannot differ from their containing file system.
ACL_SCOPE_FILE_SYSTEM accurately reflects this behavior.

Signed-off-by: Rick Macklem <rmacklem@uoguelph.ca>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Rick Macklem 2026-01-09 11:21:34 -05:00 committed by Chuck Lever
parent 4a639a727f
commit 8093c31f2c
1 changed files with 10 additions and 0 deletions
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10
fs/nfsd/nfs4xdr.c
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@ -3484,6 +3484,14 @@ static __be32 nfsd4_encode_fattr4_acl_trueform(struct xdr_stream *xdr,
return nfs_ok;
}
static __be32 nfsd4_encode_fattr4_acl_trueform_scope(struct xdr_stream *xdr,
const struct nfsd4_fattr_args *args)
{
if (!xdrgen_encode_aclscope4(xdr, ACL_SCOPE_FILE_SYSTEM))
return nfserr_resource;
return nfs_ok;
}
#endif /* CONFIG_NFSD_V4_POSIX_ACLS */
static const nfsd4_enc_attr nfsd4_enc_fattr4_encode_ops[] = {
@ -3596,8 +3604,10 @@ static const nfsd4_enc_attr nfsd4_enc_fattr4_encode_ops[] = {
#ifdef CONFIG_NFSD_V4_POSIX_ACLS
[FATTR4_ACL_TRUEFORM] = nfsd4_encode_fattr4_acl_trueform,
[FATTR4_ACL_TRUEFORM_SCOPE] = nfsd4_encode_fattr4_acl_trueform_scope,
#else
[FATTR4_ACL_TRUEFORM] = nfsd4_encode_fattr4__noop,
[FATTR4_ACL_TRUEFORM_SCOPE] = nfsd4_encode_fattr4__noop,
#endif
};