Re: [PATCH v2 10/13] nfsd: add netlink upcall for the svc_export cache

Chuck Lever
2026-03-30T14:23:03Z

On Wed, Mar 25, 2026, at 10:40 AM, Jeff Layton wrote:
> Add netlink-based cache upcall support for the svc_export (nfsd.export)
> cache to Documentation/netlink/specs/nfsd.yaml and regenerate the
> resulting files.

> diff --git a/Documentation/netlink/specs/nfsd.yaml
> b/Documentation/netlink/specs/nfsd.yaml
> index
> 8ab43c8253b2e83bcc178c3f4fe8c41c2997d153..709751502f8b56bd4b68462fa15337df5e3e035e
> 100644
> --- a/Documentation/netlink/specs/nfsd.yaml
> +++ b/Documentation/netlink/specs/nfsd.yaml
> @@ -6,7 +6,51 @@ uapi-header: linux/nfsd_netlink.h
>
> doc: NFSD configuration over generic netlink.
>
> +definitions:
> + -
> + type: flags
> + name: cache-type
> + entries: [svc_export]
> + -
> + type: flags
> + name: export-flags
> + doc: These flags are ordered to match the NFSEXP_* flags in
> include/linux/nfsd/export.h
> + entries:
> + - readonly
> + - insecure-port
> + - rootsquash
> + - allsquash
> + - async
> + - gathered-writes
> + - noreaddirplus
> + - security-label
> + - sign-fh
> + - nohide
> + - nosubtreecheck
> + - noauthnlm
> + - msnfs
> + - fsid
> + - crossmount
> + - noacl
> + - v4root
> + - pnfs
> + -
> + type: flags
> + name: xprtsec-mode
> + doc: These flags are ordered to match the NFSEXP_XPRTSEC_* flags
> in include/linux/nfsd/export.h
> + entries:
> + - none
> + - tls
> + - mtls
> +
> attribute-sets:
> + -
> + name: cache-notify
> + attributes:
> + -
> + name: cache-type
> + type: u32
> + enum: cache-type
> -
> name: rpc-status
> attributes:
> @@ -132,6 +176,103 @@ attribute-sets:
> -
> name: npools
> type: u32
> + -
> + name: fslocation
> + attributes:
> + -
> + name: host
> + type: string
> + -
> + name: path
> + type: string
> + -
> + name: fslocations
> + attributes:
> + -
> + name: location
> + type: nest
> + nested-attributes: fslocation
> + multi-attr: true
> + -
> + name: auth-flavor
> + attributes:
> + -
> + name: pseudoflavor
> + type: u32
> + -
> + name: flags
> + type: u32
> + enum: export-flags
> + enum-as-flags: true
> + -
> + name: svc-export-req
> + attributes:
> + -
> + name: seqno
> + type: u64
> + -
> + name: client
> + type: string
> + -
> + name: path
> + type: string

Is the svc-export-req attribute set used for anything?

> + -
> + name: svc-export
> + attributes:
> + -
> + name: seqno
> + type: u64
> + -
> + name: client
> + type: string
> + -
> + name: path
> + type: string
> + -
> + name: negative
> + type: flag
> + -
> + name: expiry
> + type: u64
> + -
> + name: anon-uid
> + type: u32
> + -
> + name: anon-gid
> + type: u32
> + -
> + name: fslocations
> + type: nest
> + nested-attributes: fslocations
> + -
> + name: uuid
> + type: binary
> + -
> + name: secinfo
> + type: nest
> + nested-attributes: auth-flavor
> + multi-attr: true
> + -
> + name: xprtsec
> + type: u32
> + enum: xprtsec-mode
> + multi-attr: true
> + -
> + name: flags
> + type: u32
> + enum: export-flags
> + enum-as-flags: true
> + -
> + name: fsid
> + type: s32
> + -
> + name: svc-export-reqs
> + attributes:
> + -
> + name: requests
> + type: nest
> + nested-attributes: svc-export
> + multi-attr: true
>
> operations:
> list:
> @@ -233,3 +374,36 @@ operations:
> attributes:
> - mode
> - npools
> + -
> + name: cache-notify
> + doc: Notification that there are cache requests that need
> servicing
> + attribute-set: cache-notify
> + mcgrp: exportd
> + event:
> + attributes:
> + - cache-type
> + -
> + name: svc-export-get-reqs
> + doc: Dump all pending svc_export requests
> + attribute-set: svc-export-reqs
> + flags: [admin-perm]
> + dump:
> + request:
> + attributes:
> + - requests
> + -
> + name: svc-export-set-reqs
> + doc: Respond to one or more svc_export requests
> + attribute-set: svc-export-reqs
> + flags: [admin-perm]
> + do:
> + request:
> + attributes:
> + - requests
> +
> +mcast-groups:
> + list:
> + -
> + name: none
> + -
> + name: exportd

--
Chuck Lever