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NFSD: add write_version to netlink command

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Introduce write_version netlink command through a "declarative" interface.
This patch introduces a change in behavior since for version-set userspace
is expected to provide a NFS major/minor version list it wants to enable
while all the other ones will be disabled. (procfs write_version
command implements imperative interface where the admin writes +3/-3 to
enable/disable a single version.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Tested-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Lorenzo Bianconi
2024-04-23 15:25:41 +02:00
committed by Chuck Lever
parent 924f4fb003
commit 5a939bea25
7 changed files with 236 additions and 2 deletions
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include/uapi/linux/nfsd_netlink.h
+18
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@@ -39,10 +39,28 @@ enum {
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_CMD_RPC_STATUS_GET = 1,
NFSD_CMD_THREADS_SET,
NFSD_CMD_THREADS_GET,
NFSD_CMD_VERSION_SET,
NFSD_CMD_VERSION_GET,
__NFSD_CMD_MAX,
NFSD_CMD_MAX = (__NFSD_CMD_MAX - 1)