80df9d2022
This patch subscribes RPC clients to RPC pipefs notifications. RPC clients notifier block is registering with pipefs initialization during SUNRPC module init. This notifier callback is responsible for RPC client PipeFS directory and GSS pipes creation. For pipes creation and destruction two additional callbacks were added to struct rpc_authops. Note that no locking required in notifier callback because PipeFS superblock pointer is passed as an argument from it's creation or destruction routine and thus we can be sure about it's validity. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
163 lines
5 KiB
C
163 lines
5 KiB
C
/*
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* linux/include/linux/sunrpc/auth.h
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*
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* Declarations for the RPC client authentication machinery.
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*
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* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
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*/
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#ifndef _LINUX_SUNRPC_AUTH_H
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#define _LINUX_SUNRPC_AUTH_H
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#ifdef __KERNEL__
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#include <linux/sunrpc/sched.h>
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#include <linux/sunrpc/msg_prot.h>
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#include <linux/sunrpc/xdr.h>
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#include <linux/atomic.h>
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#include <linux/rcupdate.h>
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/* size of the nodename buffer */
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#define UNX_MAXNODENAME 32
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/* Work around the lack of a VFS credential */
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struct auth_cred {
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uid_t uid;
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gid_t gid;
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struct group_info *group_info;
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const char *principal;
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unsigned char machine_cred : 1;
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};
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/*
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* Client user credentials
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*/
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struct rpc_auth;
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struct rpc_credops;
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struct rpc_cred {
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struct hlist_node cr_hash; /* hash chain */
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struct list_head cr_lru; /* lru garbage collection */
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struct rcu_head cr_rcu;
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struct rpc_auth * cr_auth;
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const struct rpc_credops *cr_ops;
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#ifdef RPC_DEBUG
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unsigned long cr_magic; /* 0x0f4aa4f0 */
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#endif
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unsigned long cr_expire; /* when to gc */
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unsigned long cr_flags; /* various flags */
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atomic_t cr_count; /* ref count */
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uid_t cr_uid;
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/* per-flavor data */
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};
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#define RPCAUTH_CRED_NEW 0
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#define RPCAUTH_CRED_UPTODATE 1
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#define RPCAUTH_CRED_HASHED 2
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#define RPCAUTH_CRED_NEGATIVE 3
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#define RPCAUTH_CRED_MAGIC 0x0f4aa4f0
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/*
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* Client authentication handle
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*/
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struct rpc_cred_cache;
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struct rpc_authops;
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struct rpc_auth {
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unsigned int au_cslack; /* call cred size estimate */
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/* guess at number of u32's auth adds before
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* reply data; normally the verifier size: */
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unsigned int au_rslack;
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/* for gss, used to calculate au_rslack: */
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unsigned int au_verfsize;
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unsigned int au_flags; /* various flags */
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const struct rpc_authops *au_ops; /* operations */
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rpc_authflavor_t au_flavor; /* pseudoflavor (note may
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* differ from the flavor in
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* au_ops->au_flavor in gss
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* case) */
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atomic_t au_count; /* Reference counter */
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struct rpc_cred_cache * au_credcache;
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/* per-flavor data */
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};
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/* Flags for rpcauth_lookupcred() */
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#define RPCAUTH_LOOKUP_NEW 0x01 /* Accept an uninitialised cred */
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/*
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* Client authentication ops
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*/
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struct rpc_authops {
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struct module *owner;
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rpc_authflavor_t au_flavor; /* flavor (RPC_AUTH_*) */
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char * au_name;
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struct rpc_auth * (*create)(struct rpc_clnt *, rpc_authflavor_t);
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void (*destroy)(struct rpc_auth *);
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struct rpc_cred * (*lookup_cred)(struct rpc_auth *, struct auth_cred *, int);
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struct rpc_cred * (*crcreate)(struct rpc_auth*, struct auth_cred *, int);
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int (*pipes_create)(struct rpc_auth *);
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void (*pipes_destroy)(struct rpc_auth *);
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};
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struct rpc_credops {
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const char * cr_name; /* Name of the auth flavour */
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int (*cr_init)(struct rpc_auth *, struct rpc_cred *);
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void (*crdestroy)(struct rpc_cred *);
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int (*crmatch)(struct auth_cred *, struct rpc_cred *, int);
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struct rpc_cred * (*crbind)(struct rpc_task *, struct rpc_cred *, int);
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__be32 * (*crmarshal)(struct rpc_task *, __be32 *);
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int (*crrefresh)(struct rpc_task *);
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__be32 * (*crvalidate)(struct rpc_task *, __be32 *);
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int (*crwrap_req)(struct rpc_task *, kxdreproc_t,
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void *, __be32 *, void *);
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int (*crunwrap_resp)(struct rpc_task *, kxdrdproc_t,
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void *, __be32 *, void *);
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};
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extern const struct rpc_authops authunix_ops;
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extern const struct rpc_authops authnull_ops;
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int __init rpc_init_authunix(void);
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int __init rpc_init_generic_auth(void);
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int __init rpcauth_init_module(void);
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void rpcauth_remove_module(void);
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void rpc_destroy_generic_auth(void);
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void rpc_destroy_authunix(void);
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struct rpc_cred * rpc_lookup_cred(void);
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struct rpc_cred * rpc_lookup_machine_cred(const char *service_name);
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int rpcauth_register(const struct rpc_authops *);
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int rpcauth_unregister(const struct rpc_authops *);
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struct rpc_auth * rpcauth_create(rpc_authflavor_t, struct rpc_clnt *);
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void rpcauth_release(struct rpc_auth *);
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struct rpc_cred * rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int);
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void rpcauth_init_cred(struct rpc_cred *, const struct auth_cred *, struct rpc_auth *, const struct rpc_credops *);
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struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int);
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struct rpc_cred * rpcauth_generic_bind_cred(struct rpc_task *, struct rpc_cred *, int);
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void put_rpccred(struct rpc_cred *);
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__be32 * rpcauth_marshcred(struct rpc_task *, __be32 *);
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__be32 * rpcauth_checkverf(struct rpc_task *, __be32 *);
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int rpcauth_wrap_req(struct rpc_task *task, kxdreproc_t encode, void *rqstp, __be32 *data, void *obj);
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int rpcauth_unwrap_resp(struct rpc_task *task, kxdrdproc_t decode, void *rqstp, __be32 *data, void *obj);
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int rpcauth_refreshcred(struct rpc_task *);
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void rpcauth_invalcred(struct rpc_task *);
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int rpcauth_uptodatecred(struct rpc_task *);
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int rpcauth_init_credcache(struct rpc_auth *);
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void rpcauth_destroy_credcache(struct rpc_auth *);
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void rpcauth_clear_credcache(struct rpc_cred_cache *);
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static inline
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struct rpc_cred * get_rpccred(struct rpc_cred *cred)
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{
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atomic_inc(&cred->cr_count);
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return cred;
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}
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#endif /* __KERNEL__ */
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#endif /* _LINUX_SUNRPC_AUTH_H */
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