diff options
| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2024-04-23 15:25:41 +0200 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2024-05-06 09:07:21 -0400 |
| commit | 5a939bea25be9793d9aa5d8494df667dfe625e6b (patch) | |
| tree | 7acecf776e1a58f098a7d1fed79345845f7896f8 /fs/nfsd/netlink.c | |
| parent | 924f4fb003ba114c60b3c07a011dcd86a8956cd1 (diff) | |
NFSD: add write_version to netlink command
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>
Diffstat (limited to 'fs/nfsd/netlink.c')
| -rw-r--r-- | fs/nfsd/netlink.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/nfsd/netlink.c b/fs/nfsd/netlink.c index fe9eef5c7f27..b23b0b84a59a 100644 --- a/fs/nfsd/netlink.c +++ b/fs/nfsd/netlink.c @@ -10,6 +10,13 @@ #include <uapi/linux/nfsd_netlink.h> +/* Common nested types */ +const struct nla_policy nfsd_version_nl_policy[NFSD_A_VERSION_ENABLED + 1] = { + [NFSD_A_VERSION_MAJOR] = { .type = NLA_U32, }, + [NFSD_A_VERSION_MINOR] = { .type = NLA_U32, }, + [NFSD_A_VERSION_ENABLED] = { .type = NLA_FLAG, }, +}; + /* NFSD_CMD_THREADS_SET - do */ static const struct nla_policy nfsd_threads_set_nl_policy[NFSD_A_SERVER_SCOPE + 1] = { [NFSD_A_SERVER_THREADS] = { .type = NLA_U32, }, @@ -18,6 +25,11 @@ static const struct nla_policy nfsd_threads_set_nl_policy[NFSD_A_SERVER_SCOPE + [NFSD_A_SERVER_SCOPE] = { .type = NLA_NUL_STRING, }, }; +/* NFSD_CMD_VERSION_SET - do */ +static const struct nla_policy nfsd_version_set_nl_policy[NFSD_A_SERVER_PROTO_VERSION + 1] = { + [NFSD_A_SERVER_PROTO_VERSION] = NLA_POLICY_NESTED(nfsd_version_nl_policy), +}; + /* Ops table for nfsd */ static const struct genl_split_ops nfsd_nl_ops[] = { { @@ -39,6 +51,18 @@ static const struct genl_split_ops nfsd_nl_ops[] = { .doit = nfsd_nl_threads_get_doit, .flags = GENL_CMD_CAP_DO, }, + { + .cmd = NFSD_CMD_VERSION_SET, + .doit = nfsd_nl_version_set_doit, + .policy = nfsd_version_set_nl_policy, + .maxattr = NFSD_A_SERVER_PROTO_VERSION, + .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO, + }, + { + .cmd = NFSD_CMD_VERSION_GET, + .doit = nfsd_nl_version_get_doit, + .flags = GENL_CMD_CAP_DO, + }, }; struct genl_family nfsd_nl_family __ro_after_init = { |