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linux-stable-mirror/include/uapi/linux/nfsd_netlink.h
T
Chuck LeverandChuck Lever 2eac189bb0 NFSD: Add NFSD_CMD_UNLOCK_EXPORT netlink command
When a filesystem is exported to NFS clients, NFSv4 state
(opens, locks, delegations, layouts) holds references that
prevent the underlying filesystem from being unmounted.
NFSD_CMD_UNLOCK_FILESYSTEM addresses this at superblock
granularity, but administrators unexporting a single path on a
shared filesystem (e.g., one of several exports on the same device)
need finer control.

Add NFSD_CMD_UNLOCK_EXPORT, which revokes NFSv4 state acquired
through exports of a specific path.  Matching is by path identity
(dentry + vfsmount) via the sc_export field on each nfs4_stid,
so multiple svc_export objects for the same path -- one per
auth_domain -- are handled correctly without requiring the caller
to name a specific client.

The command takes a single "path" attribute.  Userspace (exportfs
-u) sends this after removing the last client for a given path,
enabling the underlying filesystem to be unmounted.  When multiple
clients share an export path, individual unexports do not trigger
state revocation; only the final one does.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Tested-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2026-06-09 16:32:59 -04:00

256 lines
5.4 KiB
C

/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
/* Do not edit directly, auto-generated from: */
/* Documentation/netlink/specs/nfsd.yaml */
/* YNL-GEN uapi header */
/* To regenerate run: tools/net/ynl/ynl-regen.sh */
#ifndef _UAPI_LINUX_NFSD_NETLINK_H
#define _UAPI_LINUX_NFSD_NETLINK_H
#define NFSD_FAMILY_NAME "nfsd"
#define NFSD_FAMILY_VERSION 1
enum nfsd_cache_type {
NFSD_CACHE_TYPE_SVC_EXPORT = 1,
NFSD_CACHE_TYPE_EXPKEY = 2,
};
/*
* These flags are ordered to match the NFSEXP_* flags in
* include/linux/nfsd/export.h
*/
enum nfsd_export_flags {
NFSD_EXPORT_FLAGS_READONLY = 1,
NFSD_EXPORT_FLAGS_INSECURE_PORT = 2,
NFSD_EXPORT_FLAGS_ROOTSQUASH = 4,
NFSD_EXPORT_FLAGS_ALLSQUASH = 8,
NFSD_EXPORT_FLAGS_ASYNC = 16,
NFSD_EXPORT_FLAGS_GATHERED_WRITES = 32,
NFSD_EXPORT_FLAGS_NOREADDIRPLUS = 64,
NFSD_EXPORT_FLAGS_SECURITY_LABEL = 128,
NFSD_EXPORT_FLAGS_SIGN_FH = 256,
NFSD_EXPORT_FLAGS_NOHIDE = 512,
NFSD_EXPORT_FLAGS_NOSUBTREECHECK = 1024,
NFSD_EXPORT_FLAGS_NOAUTHNLM = 2048,
NFSD_EXPORT_FLAGS_MSNFS = 4096,
NFSD_EXPORT_FLAGS_FSID = 8192,
NFSD_EXPORT_FLAGS_CROSSMOUNT = 16384,
NFSD_EXPORT_FLAGS_NOACL = 32768,
NFSD_EXPORT_FLAGS_V4ROOT = 65536,
NFSD_EXPORT_FLAGS_PNFS = 131072,
};
/*
* These flags are ordered to match the NFSEXP_XPRTSEC_* flags in
* include/linux/nfsd/export.h
*/
enum nfsd_xprtsec_mode {
NFSD_XPRTSEC_MODE_NONE = 1,
NFSD_XPRTSEC_MODE_TLS = 2,
NFSD_XPRTSEC_MODE_MTLS = 4,
};
enum {
NFSD_A_CACHE_NOTIFY_CACHE_TYPE = 1,
__NFSD_A_CACHE_NOTIFY_MAX,
NFSD_A_CACHE_NOTIFY_MAX = (__NFSD_A_CACHE_NOTIFY_MAX - 1)
};
enum {
NFSD_A_RPC_STATUS_XID = 1,
NFSD_A_RPC_STATUS_FLAGS,
NFSD_A_RPC_STATUS_PROG,
NFSD_A_RPC_STATUS_VERSION,
NFSD_A_RPC_STATUS_PROC,
NFSD_A_RPC_STATUS_SERVICE_TIME,
NFSD_A_RPC_STATUS_PAD,
NFSD_A_RPC_STATUS_SADDR4,
NFSD_A_RPC_STATUS_DADDR4,
NFSD_A_RPC_STATUS_SADDR6,
NFSD_A_RPC_STATUS_DADDR6,
NFSD_A_RPC_STATUS_SPORT,
NFSD_A_RPC_STATUS_DPORT,
NFSD_A_RPC_STATUS_COMPOUND_OPS,
__NFSD_A_RPC_STATUS_MAX,
NFSD_A_RPC_STATUS_MAX = (__NFSD_A_RPC_STATUS_MAX - 1)
};
enum {
NFSD_A_SERVER_THREADS = 1,
NFSD_A_SERVER_GRACETIME,
NFSD_A_SERVER_LEASETIME,
NFSD_A_SERVER_SCOPE,
NFSD_A_SERVER_MIN_THREADS,
NFSD_A_SERVER_FH_KEY,
__NFSD_A_SERVER_MAX,
NFSD_A_SERVER_MAX = (__NFSD_A_SERVER_MAX - 1)
};
enum {
NFSD_A_VERSION_MAJOR = 1,
NFSD_A_VERSION_MINOR,
NFSD_A_VERSION_ENABLED,
__NFSD_A_VERSION_MAX,
NFSD_A_VERSION_MAX = (__NFSD_A_VERSION_MAX - 1)
};
enum {
NFSD_A_SERVER_PROTO_VERSION = 1,
__NFSD_A_SERVER_PROTO_MAX,
NFSD_A_SERVER_PROTO_MAX = (__NFSD_A_SERVER_PROTO_MAX - 1)
};
enum {
NFSD_A_SOCK_ADDR = 1,
NFSD_A_SOCK_TRANSPORT_NAME,
__NFSD_A_SOCK_MAX,
NFSD_A_SOCK_MAX = (__NFSD_A_SOCK_MAX - 1)
};
enum {
NFSD_A_SERVER_SOCK_ADDR = 1,
__NFSD_A_SERVER_SOCK_MAX,
NFSD_A_SERVER_SOCK_MAX = (__NFSD_A_SERVER_SOCK_MAX - 1)
};
enum {
NFSD_A_POOL_MODE_MODE = 1,
NFSD_A_POOL_MODE_NPOOLS,
__NFSD_A_POOL_MODE_MAX,
NFSD_A_POOL_MODE_MAX = (__NFSD_A_POOL_MODE_MAX - 1)
};
enum {
NFSD_A_FSLOCATION_HOST = 1,
NFSD_A_FSLOCATION_PATH,
__NFSD_A_FSLOCATION_MAX,
NFSD_A_FSLOCATION_MAX = (__NFSD_A_FSLOCATION_MAX - 1)
};
enum {
NFSD_A_FSLOCATIONS_LOCATION = 1,
__NFSD_A_FSLOCATIONS_MAX,
NFSD_A_FSLOCATIONS_MAX = (__NFSD_A_FSLOCATIONS_MAX - 1)
};
enum {
NFSD_A_AUTH_FLAVOR_PSEUDOFLAVOR = 1,
NFSD_A_AUTH_FLAVOR_FLAGS,
__NFSD_A_AUTH_FLAVOR_MAX,
NFSD_A_AUTH_FLAVOR_MAX = (__NFSD_A_AUTH_FLAVOR_MAX - 1)
};
enum {
NFSD_A_SVC_EXPORT_SEQNO = 1,
NFSD_A_SVC_EXPORT_CLIENT,
NFSD_A_SVC_EXPORT_PATH,
NFSD_A_SVC_EXPORT_NEGATIVE,
NFSD_A_SVC_EXPORT_EXPIRY,
NFSD_A_SVC_EXPORT_ANON_UID,
NFSD_A_SVC_EXPORT_ANON_GID,
NFSD_A_SVC_EXPORT_FSLOCATIONS,
NFSD_A_SVC_EXPORT_UUID,
NFSD_A_SVC_EXPORT_SECINFO,
NFSD_A_SVC_EXPORT_XPRTSEC,
NFSD_A_SVC_EXPORT_FLAGS,
NFSD_A_SVC_EXPORT_FSID,
__NFSD_A_SVC_EXPORT_MAX,
NFSD_A_SVC_EXPORT_MAX = (__NFSD_A_SVC_EXPORT_MAX - 1)
};
enum {
NFSD_A_SVC_EXPORT_REQS_REQUESTS = 1,
__NFSD_A_SVC_EXPORT_REQS_MAX,
NFSD_A_SVC_EXPORT_REQS_MAX = (__NFSD_A_SVC_EXPORT_REQS_MAX - 1)
};
enum {
NFSD_A_EXPKEY_SEQNO = 1,
NFSD_A_EXPKEY_CLIENT,
NFSD_A_EXPKEY_FSIDTYPE,
NFSD_A_EXPKEY_FSID,
NFSD_A_EXPKEY_NEGATIVE,
NFSD_A_EXPKEY_EXPIRY,
NFSD_A_EXPKEY_PATH,
__NFSD_A_EXPKEY_MAX,
NFSD_A_EXPKEY_MAX = (__NFSD_A_EXPKEY_MAX - 1)
};
enum {
NFSD_A_EXPKEY_REQS_REQUESTS = 1,
__NFSD_A_EXPKEY_REQS_MAX,
NFSD_A_EXPKEY_REQS_MAX = (__NFSD_A_EXPKEY_REQS_MAX - 1)
};
enum {
NFSD_A_CACHE_FLUSH_MASK = 1,
__NFSD_A_CACHE_FLUSH_MAX,
NFSD_A_CACHE_FLUSH_MAX = (__NFSD_A_CACHE_FLUSH_MAX - 1)
};
enum {
NFSD_A_UNLOCK_IP_ADDRESS = 1,
__NFSD_A_UNLOCK_IP_MAX,
NFSD_A_UNLOCK_IP_MAX = (__NFSD_A_UNLOCK_IP_MAX - 1)
};
enum {
NFSD_A_UNLOCK_FILESYSTEM_PATH = 1,
__NFSD_A_UNLOCK_FILESYSTEM_MAX,
NFSD_A_UNLOCK_FILESYSTEM_MAX = (__NFSD_A_UNLOCK_FILESYSTEM_MAX - 1)
};
enum {
NFSD_A_UNLOCK_EXPORT_PATH = 1,
__NFSD_A_UNLOCK_EXPORT_MAX,
NFSD_A_UNLOCK_EXPORT_MAX = (__NFSD_A_UNLOCK_EXPORT_MAX - 1)
};
enum {
NFSD_CMD_RPC_STATUS_GET = 1,
NFSD_CMD_THREADS_SET,
NFSD_CMD_THREADS_GET,
NFSD_CMD_VERSION_SET,
NFSD_CMD_VERSION_GET,
NFSD_CMD_LISTENER_SET,
NFSD_CMD_LISTENER_GET,
NFSD_CMD_POOL_MODE_SET,
NFSD_CMD_POOL_MODE_GET,
NFSD_CMD_CACHE_NOTIFY,
NFSD_CMD_SVC_EXPORT_GET_REQS,
NFSD_CMD_SVC_EXPORT_SET_REQS,
NFSD_CMD_EXPKEY_GET_REQS,
NFSD_CMD_EXPKEY_SET_REQS,
NFSD_CMD_CACHE_FLUSH,
NFSD_CMD_UNLOCK_IP,
NFSD_CMD_UNLOCK_FILESYSTEM,
NFSD_CMD_UNLOCK_EXPORT,
__NFSD_CMD_MAX,
NFSD_CMD_MAX = (__NFSD_CMD_MAX - 1)
};
#define NFSD_MCGRP_NONE "none"
#define NFSD_MCGRP_EXPORTD "exportd"
#endif /* _UAPI_LINUX_NFSD_NETLINK_H */