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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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24b2605bec
Various xdr encode routines use au_rslack to guess where the reply argument will end up, so we can set up the xdr_buf to recieve data into the right place for zero copy. Currently we calculate the au_rslack estimate when we check the verifier. Normally this only depends on the verifier size. In the integrity case we add a few bytes to allow for a length and sequence number. It's a bit simpler to calculate only the verifier size when we check the verifier, and delay the full calculation till we unwrap. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
155 lines
4.5 KiB
C
155 lines
4.5 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/config.h>
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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 <asm/atomic.h>
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/* size of the nodename buffer */
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#define UNX_MAXNODENAME 32
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/* Maximum size (in bytes) of an rpc credential or verifier */
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#define RPC_MAX_AUTH_SIZE (400)
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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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};
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/*
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* Client user credentials
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*/
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struct rpc_cred {
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struct hlist_node cr_hash; /* hash chain */
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struct rpc_credops * cr_ops;
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unsigned long cr_expire; /* when to gc */
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atomic_t cr_count; /* ref count */
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unsigned short cr_flags; /* various flags */
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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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uid_t cr_uid;
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/* per-flavor data */
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};
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#define RPCAUTH_CRED_LOCKED 0x0001
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#define RPCAUTH_CRED_UPTODATE 0x0002
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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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#define RPC_CREDCACHE_NR 8
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#define RPC_CREDCACHE_MASK (RPC_CREDCACHE_NR - 1)
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struct rpc_cred_cache {
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struct hlist_head hashtable[RPC_CREDCACHE_NR];
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unsigned long nextgc; /* next garbage collection */
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unsigned long expire; /* cache expiry interval */
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};
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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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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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#define RPC_AUTH_PROC_CREDS 0x0010 /* process creds (including
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* uid/gid, fs[ug]id, gids)
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*/
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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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#ifdef RPC_DEBUG
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char * au_name;
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#endif
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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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};
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struct rpc_credops {
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const char * cr_name; /* Name of the auth flavour */
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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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u32 * (*crmarshal)(struct rpc_task *, u32 *);
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int (*crrefresh)(struct rpc_task *);
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u32 * (*crvalidate)(struct rpc_task *, u32 *);
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int (*crwrap_req)(struct rpc_task *, kxdrproc_t,
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void *, u32 *, void *);
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int (*crunwrap_resp)(struct rpc_task *, kxdrproc_t,
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void *, u32 *, void *);
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};
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extern struct rpc_authops authunix_ops;
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extern struct rpc_authops authnull_ops;
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#ifdef CONFIG_SUNRPC_SECURE
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extern struct rpc_authops authdes_ops;
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#endif
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int rpcauth_register(struct rpc_authops *);
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int rpcauth_unregister(struct rpc_authops *);
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struct rpc_auth * rpcauth_create(rpc_authflavor_t, struct rpc_clnt *);
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void rpcauth_destroy(struct rpc_auth *);
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struct rpc_cred * rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int);
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struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int);
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struct rpc_cred * rpcauth_bindcred(struct rpc_task *);
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void rpcauth_holdcred(struct rpc_task *);
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void put_rpccred(struct rpc_cred *);
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void rpcauth_unbindcred(struct rpc_task *);
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u32 * rpcauth_marshcred(struct rpc_task *, u32 *);
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u32 * rpcauth_checkverf(struct rpc_task *, u32 *);
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int rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, u32 *data, void *obj);
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int rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, u32 *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 *, unsigned long);
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void rpcauth_free_credcache(struct rpc_auth *);
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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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