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

[Chuck Lever]

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