#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, },
[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[] = {
{
.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 = {
#include <uapi/linux/nfsd_netlink.h>
+/* Common nested types */
+extern const struct nla_policy nfsd_version_nl_policy[NFSD_A_VERSION_ENABLED + 1];
+
int nfsd_nl_rpc_status_get_start(struct netlink_callback *cb);
int nfsd_nl_rpc_status_get_done(struct netlink_callback *cb);
struct netlink_callback *cb);
int nfsd_nl_threads_set_doit(struct sk_buff *skb, struct genl_info *info);
int nfsd_nl_threads_get_doit(struct sk_buff *skb, struct genl_info *info);
+int nfsd_nl_version_set_doit(struct sk_buff *skb, struct genl_info *info);
+int nfsd_nl_version_get_doit(struct sk_buff *skb, struct genl_info *info);
extern struct genl_family nfsd_nl_family;
return err;
}
+/**
+ * nfsd_nl_version_set_doit - set the nfs enabled versions
+ * @skb: reply buffer
+ * @info: netlink metadata and command arguments
+ *
+ * Return 0 on success or a negative errno.
+ */
+int nfsd_nl_version_set_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ const struct nlattr *attr;
+ struct nfsd_net *nn;
+ int i, rem;
+
+ if (GENL_REQ_ATTR_CHECK(info, NFSD_A_SERVER_PROTO_VERSION))
+ return -EINVAL;
+
+ mutex_lock(&nfsd_mutex);
+
+ nn = net_generic(genl_info_net(info), nfsd_net_id);
+ if (nn->nfsd_serv) {
+ mutex_unlock(&nfsd_mutex);
+ return -EBUSY;
+ }
+
+ /* clear current supported versions. */
+ nfsd_vers(nn, 2, NFSD_CLEAR);
+ nfsd_vers(nn, 3, NFSD_CLEAR);
+ for (i = 0; i <= NFSD_SUPPORTED_MINOR_VERSION; i++)
+ nfsd_minorversion(nn, i, NFSD_CLEAR);
+
+ nlmsg_for_each_attr(attr, info->nlhdr, GENL_HDRLEN, rem) {
+ struct nlattr *tb[NFSD_A_VERSION_MAX + 1];
+ u32 major, minor = 0;
+ bool enabled;
+
+ if (nla_type(attr) != NFSD_A_SERVER_PROTO_VERSION)
+ continue;
+
+ if (nla_parse_nested(tb, NFSD_A_VERSION_MAX, attr,
+ nfsd_version_nl_policy, info->extack) < 0)
+ continue;
+
+ if (!tb[NFSD_A_VERSION_MAJOR])
+ continue;
+
+ major = nla_get_u32(tb[NFSD_A_VERSION_MAJOR]);
+ if (tb[NFSD_A_VERSION_MINOR])
+ minor = nla_get_u32(tb[NFSD_A_VERSION_MINOR]);
+
+ enabled = nla_get_flag(tb[NFSD_A_VERSION_ENABLED]);
+
+ switch (major) {
+ case 4:
+ nfsd_minorversion(nn, minor, enabled ? NFSD_SET : NFSD_CLEAR);
+ break;
+ case 3:
+ case 2:
+ if (!minor)
+ nfsd_vers(nn, major, enabled ? NFSD_SET : NFSD_CLEAR);
+ break;
+ default:
+ break;
+ }
+ }
+
+ mutex_unlock(&nfsd_mutex);
+
+ return 0;
+}
+
+/**
+ * nfsd_nl_version_get_doit - get the enabled status for all supported nfs versions
+ * @skb: reply buffer
+ * @info: netlink metadata and command arguments
+ *
+ * Return 0 on success or a negative errno.
+ */
+int nfsd_nl_version_get_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nfsd_net *nn;
+ int i, err;
+ void *hdr;
+
+ skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ hdr = genlmsg_iput(skb, info);
+ if (!hdr) {
+ err = -EMSGSIZE;
+ goto err_free_msg;
+ }
+
+ mutex_lock(&nfsd_mutex);
+ nn = net_generic(genl_info_net(info), nfsd_net_id);
+
+ for (i = 2; i <= 4; i++) {
+ int j;
+
+ for (j = 0; j <= NFSD_SUPPORTED_MINOR_VERSION; j++) {
+ struct nlattr *attr;
+
+ /* Don't record any versions the kernel doesn't have
+ * compiled in
+ */
+ if (!nfsd_support_version(i))
+ continue;
+
+ /* NFSv{2,3} does not support minor numbers */
+ if (i < 4 && j)
+ continue;
+
+ attr = nla_nest_start(skb,
+ NFSD_A_SERVER_PROTO_VERSION);
+ if (!attr) {
+ err = -EINVAL;
+ goto err_nfsd_unlock;
+ }
+
+ if (nla_put_u32(skb, NFSD_A_VERSION_MAJOR, i) ||
+ nla_put_u32(skb, NFSD_A_VERSION_MINOR, j)) {
+ err = -EINVAL;
+ goto err_nfsd_unlock;
+ }
+
+ /* Set the enabled flag if the version is enabled */
+ if (nfsd_vers(nn, i, NFSD_TEST) &&
+ (i < 4 || nfsd_minorversion(nn, j, NFSD_TEST)) &&
+ nla_put_flag(skb, NFSD_A_VERSION_ENABLED)) {
+ err = -EINVAL;
+ goto err_nfsd_unlock;
+ }
+
+ nla_nest_end(skb, attr);
+ }
+ }
+
+ mutex_unlock(&nfsd_mutex);
+ genlmsg_end(skb, hdr);
+
+ return genlmsg_reply(skb, info);
+
+err_nfsd_unlock:
+ mutex_unlock(&nfsd_mutex);
+err_free_msg:
+ nlmsg_free(skb);
+
+ return err;
+}
+
/**
* nfsd_net_init - Prepare the nfsd_net portion of a new net namespace
* @net: a freshly-created network namespace
projects / linux.git / commitdiff