1 files changed, 198 insertions, 0 deletions
diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
new file mode 100644
index 000000000..a7cbb570c
--- /dev/null
+++ b/include/linux/sunrpc/auth.h
@@ -0,0 +1,198 @@
+/*
+ * linux/include/linux/sunrpc/auth.h
+ *
+ * Declarations for the RPC client authentication machinery.
+ *
+ * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef _LINUX_SUNRPC_AUTH_H
+#define _LINUX_SUNRPC_AUTH_H
+
+#ifdef __KERNEL__
+
+#include <linux/sunrpc/sched.h>
+#include <linux/sunrpc/msg_prot.h>
+#include <linux/sunrpc/xdr.h>
+
+#include <linux/atomic.h>
+#include <linux/rcupdate.h>
+#include <linux/uidgid.h>
+
+/* size of the nodename buffer */
+#define UNX_MAXNODENAME	32
+
+struct rpcsec_gss_info;
+
+/* auth_cred ac_flags bits */
+enum {
+	RPC_CRED_NO_CRKEY_TIMEOUT = 0, /* underlying cred has no key timeout */
+	RPC_CRED_KEY_EXPIRE_SOON = 1, /* underlying cred key will expire soon */
+	RPC_CRED_NOTIFY_TIMEOUT = 2,   /* nofity generic cred when underlying
+					key will expire soon */
+};
+
+/* Work around the lack of a VFS credential */
+struct auth_cred {
+	kuid_t	uid;
+	kgid_t	gid;
+	struct group_info *group_info;
+	const char *principal;
+	unsigned long ac_flags;
+	unsigned char machine_cred : 1;
+};
+
+/*
+ * Client user credentials
+ */
+struct rpc_auth;
+struct rpc_credops;
+struct rpc_cred {
+	struct hlist_node	cr_hash;	/* hash chain */
+	struct list_head	cr_lru;		/* lru garbage collection */
+	struct rcu_head		cr_rcu;
+	struct rpc_auth *	cr_auth;
+	const struct rpc_credops *cr_ops;
+#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
+	unsigned long		cr_magic;	/* 0x0f4aa4f0 */
+#endif
+	unsigned long		cr_expire;	/* when to gc */
+	unsigned long		cr_flags;	/* various flags */
+	atomic_t		cr_count;	/* ref count */
+
+	kuid_t			cr_uid;
+
+	/* per-flavor data */
+};
+#define RPCAUTH_CRED_NEW	0
+#define RPCAUTH_CRED_UPTODATE	1
+#define RPCAUTH_CRED_HASHED	2
+#define RPCAUTH_CRED_NEGATIVE	3
+
+#define RPCAUTH_CRED_MAGIC	0x0f4aa4f0
+
+/*
+ * Client authentication handle
+ */
+struct rpc_cred_cache;
+struct rpc_authops;
+struct rpc_auth {
+	unsigned int		au_cslack;	/* call cred size estimate */
+				/* guess at number of u32's auth adds before
+				 * reply data; normally the verifier size: */
+	unsigned int		au_rslack;
+				/* for gss, used to calculate au_rslack: */
+	unsigned int		au_verfsize;
+
+	unsigned int		au_flags;	/* various flags */
+	const struct rpc_authops *au_ops;		/* operations */
+	rpc_authflavor_t	au_flavor;	/* pseudoflavor (note may
+						 * differ from the flavor in
+						 * au_ops->au_flavor in gss
+						 * case) */
+	atomic_t		au_count;	/* Reference counter */
+
+	struct rpc_cred_cache *	au_credcache;
+	/* per-flavor data */
+};
+
+struct rpc_auth_create_args {
+	rpc_authflavor_t pseudoflavor;
+	const char *target_name;
+};
+
+/* Flags for rpcauth_lookupcred() */
+#define RPCAUTH_LOOKUP_NEW		0x01	/* Accept an uninitialised cred */
+#define RPCAUTH_LOOKUP_RCU		0x02	/* lock-less lookup */
+
+/*
+ * Client authentication ops
+ */
+struct rpc_authops {
+	struct module		*owner;
+	rpc_authflavor_t	au_flavor;	/* flavor (RPC_AUTH_*) */
+	char *			au_name;
+	struct rpc_auth *	(*create)(struct rpc_auth_create_args *, struct rpc_clnt *);
+	void			(*destroy)(struct rpc_auth *);
+
+	struct rpc_cred *	(*lookup_cred)(struct rpc_auth *, struct auth_cred *, int);
+	struct rpc_cred *	(*crcreate)(struct rpc_auth*, struct auth_cred *, int);
+	int			(*list_pseudoflavors)(rpc_authflavor_t *, int);
+	rpc_authflavor_t	(*info2flavor)(struct rpcsec_gss_info *);
+	int			(*flavor2info)(rpc_authflavor_t,
+						struct rpcsec_gss_info *);
+	int			(*key_timeout)(struct rpc_auth *,
+						struct rpc_cred *);
+};
+
+struct rpc_credops {
+	const char *		cr_name;	/* Name of the auth flavour */
+	int			(*cr_init)(struct rpc_auth *, struct rpc_cred *);
+	void			(*crdestroy)(struct rpc_cred *);
+
+	int			(*crmatch)(struct auth_cred *, struct rpc_cred *, int);
+	struct rpc_cred *	(*crbind)(struct rpc_task *, struct rpc_cred *, int);
+	__be32 *		(*crmarshal)(struct rpc_task *, __be32 *);
+	int			(*crrefresh)(struct rpc_task *);
+	__be32 *		(*crvalidate)(struct rpc_task *, __be32 *);
+	int			(*crwrap_req)(struct rpc_task *, kxdreproc_t,
+						void *, __be32 *, void *);
+	int			(*crunwrap_resp)(struct rpc_task *, kxdrdproc_t,
+						void *, __be32 *, void *);
+	int			(*crkey_timeout)(struct rpc_cred *);
+	bool			(*crkey_to_expire)(struct rpc_cred *);
+	char *			(*crstringify_acceptor)(struct rpc_cred *);
+};
+
+extern const struct rpc_authops	authunix_ops;
+extern const struct rpc_authops	authnull_ops;
+
+int __init		rpc_init_authunix(void);
+int __init		rpc_init_generic_auth(void);
+int __init		rpcauth_init_module(void);
+void			rpcauth_remove_module(void);
+void			rpc_destroy_generic_auth(void);
+void 			rpc_destroy_authunix(void);
+
+struct rpc_cred *	rpc_lookup_cred(void);
+struct rpc_cred *	rpc_lookup_cred_nonblock(void);
+struct rpc_cred *	rpc_lookup_machine_cred(const char *service_name);
+int			rpcauth_register(const struct rpc_authops *);
+int			rpcauth_unregister(const struct rpc_authops *);
+struct rpc_auth *	rpcauth_create(struct rpc_auth_create_args *,
+				struct rpc_clnt *);
+void			rpcauth_release(struct rpc_auth *);
+rpc_authflavor_t	rpcauth_get_pseudoflavor(rpc_authflavor_t,
+				struct rpcsec_gss_info *);
+int			rpcauth_get_gssinfo(rpc_authflavor_t,
+				struct rpcsec_gss_info *);
+int			rpcauth_list_flavors(rpc_authflavor_t *, int);
+struct rpc_cred *	rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int);
+void			rpcauth_init_cred(struct rpc_cred *, const struct auth_cred *, struct rpc_auth *, const struct rpc_credops *);
+struct rpc_cred *	rpcauth_lookupcred(struct rpc_auth *, int);
+struct rpc_cred *	rpcauth_generic_bind_cred(struct rpc_task *, struct rpc_cred *, int);
+void			put_rpccred(struct rpc_cred *);
+__be32 *		rpcauth_marshcred(struct rpc_task *, __be32 *);
+__be32 *		rpcauth_checkverf(struct rpc_task *, __be32 *);
+int			rpcauth_wrap_req(struct rpc_task *task, kxdreproc_t encode, void *rqstp, __be32 *data, void *obj);
+int			rpcauth_unwrap_resp(struct rpc_task *task, kxdrdproc_t decode, void *rqstp, __be32 *data, void *obj);
+int			rpcauth_refreshcred(struct rpc_task *);
+void			rpcauth_invalcred(struct rpc_task *);
+int			rpcauth_uptodatecred(struct rpc_task *);
+int			rpcauth_init_credcache(struct rpc_auth *);
+void			rpcauth_destroy_credcache(struct rpc_auth *);
+void			rpcauth_clear_credcache(struct rpc_cred_cache *);
+int			rpcauth_key_timeout_notify(struct rpc_auth *,
+						struct rpc_cred *);
+bool			rpcauth_cred_key_to_expire(struct rpc_cred *);
+char *			rpcauth_stringify_acceptor(struct rpc_cred *);
+
+static inline
+struct rpc_cred *	get_rpccred(struct rpc_cred *cred)
+{
+	atomic_inc(&cred->cr_count);
+	return cred;
+}
+
+#endif /* __KERNEL__ */
+#endif /* _LINUX_SUNRPC_AUTH_H */