320 lines
9.5 KiB
C
320 lines
9.5 KiB
C
/*
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* linux/include/linux/sunrpc/clnt.h
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*
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* Declarations for the high-level RPC client interface
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*
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* Copyright (C) 1995, 1996, Olaf Kirch <okir@monad.swb.de>
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*/
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#ifndef _LINUX_SUNRPC_CLNT_H
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#define _LINUX_SUNRPC_CLNT_H
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/sunrpc/msg_prot.h>
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#include <linux/sunrpc/sched.h>
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#include <linux/sunrpc/xprt.h>
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#include <linux/sunrpc/auth.h>
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#include <linux/sunrpc/stats.h>
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#include <linux/sunrpc/xdr.h>
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#include <linux/sunrpc/timer.h>
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#include <asm/signal.h>
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#include <linux/path.h>
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#include <net/ipv6.h>
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struct rpc_inode;
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/*
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* The high-level client handle
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*/
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struct rpc_clnt {
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atomic_t cl_count; /* Number of references */
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struct list_head cl_clients; /* Global list of clients */
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struct list_head cl_tasks; /* List of tasks */
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spinlock_t cl_lock; /* spinlock */
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struct rpc_xprt __rcu * cl_xprt; /* transport */
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struct rpc_procinfo * cl_procinfo; /* procedure info */
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u32 cl_prog, /* RPC program number */
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cl_vers, /* RPC version number */
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cl_maxproc; /* max procedure number */
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const char * cl_protname; /* protocol name */
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struct rpc_auth * cl_auth; /* authenticator */
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struct rpc_stat * cl_stats; /* per-program statistics */
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struct rpc_iostats * cl_metrics; /* per-client statistics */
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unsigned int cl_softrtry : 1,/* soft timeouts */
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cl_discrtry : 1,/* disconnect before retry */
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cl_autobind : 1,/* use getport() */
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cl_chatty : 1;/* be verbose */
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struct rpc_rtt * cl_rtt; /* RTO estimator data */
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const struct rpc_timeout *cl_timeout; /* Timeout strategy */
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int cl_nodelen; /* nodename length */
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char cl_nodename[UNX_MAXNODENAME];
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struct dentry * cl_dentry;
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struct rpc_clnt * cl_parent; /* Points to parent of clones */
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struct rpc_rtt cl_rtt_default;
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struct rpc_timeout cl_timeout_default;
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const struct rpc_program *cl_program;
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char *cl_principal; /* target to authenticate to */
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};
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/*
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* General RPC program info
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*/
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#define RPC_MAXVERSION 4
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struct rpc_program {
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const char * name; /* protocol name */
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u32 number; /* program number */
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unsigned int nrvers; /* number of versions */
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const struct rpc_version ** version; /* version array */
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struct rpc_stat * stats; /* statistics */
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const char * pipe_dir_name; /* path to rpc_pipefs dir */
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};
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struct rpc_version {
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u32 number; /* version number */
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unsigned int nrprocs; /* number of procs */
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struct rpc_procinfo * procs; /* procedure array */
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};
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/*
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* Procedure information
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*/
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struct rpc_procinfo {
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u32 p_proc; /* RPC procedure number */
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kxdreproc_t p_encode; /* XDR encode function */
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kxdrdproc_t p_decode; /* XDR decode function */
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unsigned int p_arglen; /* argument hdr length (u32) */
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unsigned int p_replen; /* reply hdr length (u32) */
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unsigned int p_count; /* call count */
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unsigned int p_timer; /* Which RTT timer to use */
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u32 p_statidx; /* Which procedure to account */
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const char * p_name; /* name of procedure */
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};
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#ifdef __KERNEL__
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struct rpc_create_args {
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struct net *net;
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int protocol;
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struct sockaddr *address;
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size_t addrsize;
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struct sockaddr *saddress;
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const struct rpc_timeout *timeout;
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const char *servername;
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const struct rpc_program *program;
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u32 prognumber; /* overrides program->number */
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u32 version;
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rpc_authflavor_t authflavor;
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unsigned long flags;
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char *client_name;
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struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
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};
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/* Values for "flags" field */
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#define RPC_CLNT_CREATE_HARDRTRY (1UL << 0)
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#define RPC_CLNT_CREATE_AUTOBIND (1UL << 2)
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#define RPC_CLNT_CREATE_NONPRIVPORT (1UL << 3)
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#define RPC_CLNT_CREATE_NOPING (1UL << 4)
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#define RPC_CLNT_CREATE_DISCRTRY (1UL << 5)
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#define RPC_CLNT_CREATE_QUIET (1UL << 6)
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struct rpc_clnt *rpc_create(struct rpc_create_args *args);
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struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
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const struct rpc_program *, u32);
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void rpc_task_reset_client(struct rpc_task *task, struct rpc_clnt *clnt);
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struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
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void rpc_shutdown_client(struct rpc_clnt *);
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void rpc_release_client(struct rpc_clnt *);
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void rpc_task_release_client(struct rpc_task *);
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int rpcb_create_local(struct net *);
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void rpcb_put_local(struct net *);
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int rpcb_register(struct net *, u32, u32, int, unsigned short);
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int rpcb_v4_register(struct net *net, const u32 program,
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const u32 version,
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const struct sockaddr *address,
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const char *netid);
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void rpcb_getport_async(struct rpc_task *);
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void rpc_call_start(struct rpc_task *);
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int rpc_call_async(struct rpc_clnt *clnt,
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const struct rpc_message *msg, int flags,
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const struct rpc_call_ops *tk_ops,
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void *calldata);
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int rpc_call_sync(struct rpc_clnt *clnt,
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const struct rpc_message *msg, int flags);
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struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred,
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int flags);
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int rpc_restart_call_prepare(struct rpc_task *);
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int rpc_restart_call(struct rpc_task *);
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void rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
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int rpc_protocol(struct rpc_clnt *);
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struct net * rpc_net_ns(struct rpc_clnt *);
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size_t rpc_max_payload(struct rpc_clnt *);
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void rpc_force_rebind(struct rpc_clnt *);
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size_t rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
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const char *rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
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int rpc_localaddr(struct rpc_clnt *, struct sockaddr *, size_t);
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size_t rpc_ntop(const struct sockaddr *, char *, const size_t);
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size_t rpc_pton(struct net *, const char *, const size_t,
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struct sockaddr *, const size_t);
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char * rpc_sockaddr2uaddr(const struct sockaddr *, gfp_t);
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size_t rpc_uaddr2sockaddr(struct net *, const char *, const size_t,
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struct sockaddr *, const size_t);
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static inline unsigned short rpc_get_port(const struct sockaddr *sap)
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{
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switch (sap->sa_family) {
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case AF_INET:
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return ntohs(((struct sockaddr_in *)sap)->sin_port);
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case AF_INET6:
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return ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
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}
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return 0;
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}
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static inline void rpc_set_port(struct sockaddr *sap,
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const unsigned short port)
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{
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switch (sap->sa_family) {
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case AF_INET:
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((struct sockaddr_in *)sap)->sin_port = htons(port);
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break;
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case AF_INET6:
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((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
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break;
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}
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}
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#define IPV6_SCOPE_DELIMITER '%'
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#define IPV6_SCOPE_ID_LEN sizeof("%nnnnnnnnnn")
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static inline bool __rpc_cmp_addr4(const struct sockaddr *sap1,
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const struct sockaddr *sap2)
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{
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const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sap1;
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const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sap2;
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return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
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}
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static inline bool __rpc_copy_addr4(struct sockaddr *dst,
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const struct sockaddr *src)
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{
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const struct sockaddr_in *ssin = (struct sockaddr_in *) src;
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struct sockaddr_in *dsin = (struct sockaddr_in *) dst;
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dsin->sin_family = ssin->sin_family;
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dsin->sin_addr.s_addr = ssin->sin_addr.s_addr;
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return true;
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}
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#if IS_ENABLED(CONFIG_IPV6)
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static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1,
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const struct sockaddr *sap2)
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{
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const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sap1;
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const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sap2;
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if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
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return false;
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else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
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return sin1->sin6_scope_id == sin2->sin6_scope_id;
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return true;
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}
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static inline bool __rpc_copy_addr6(struct sockaddr *dst,
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const struct sockaddr *src)
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{
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const struct sockaddr_in6 *ssin6 = (const struct sockaddr_in6 *) src;
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struct sockaddr_in6 *dsin6 = (struct sockaddr_in6 *) dst;
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dsin6->sin6_family = ssin6->sin6_family;
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dsin6->sin6_addr = ssin6->sin6_addr;
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return true;
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}
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#else /* !(IS_ENABLED(CONFIG_IPV6) */
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static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1,
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const struct sockaddr *sap2)
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{
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return false;
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}
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static inline bool __rpc_copy_addr6(struct sockaddr *dst,
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const struct sockaddr *src)
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{
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return false;
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}
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#endif /* !(IS_ENABLED(CONFIG_IPV6) */
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/**
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* rpc_cmp_addr - compare the address portion of two sockaddrs.
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* @sap1: first sockaddr
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* @sap2: second sockaddr
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*
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* Just compares the family and address portion. Ignores port, scope, etc.
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* Returns true if the addrs are equal, false if they aren't.
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*/
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static inline bool rpc_cmp_addr(const struct sockaddr *sap1,
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const struct sockaddr *sap2)
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{
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if (sap1->sa_family == sap2->sa_family) {
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switch (sap1->sa_family) {
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case AF_INET:
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return __rpc_cmp_addr4(sap1, sap2);
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case AF_INET6:
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return __rpc_cmp_addr6(sap1, sap2);
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}
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}
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return false;
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}
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/**
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* rpc_copy_addr - copy the address portion of one sockaddr to another
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* @dst: destination sockaddr
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* @src: source sockaddr
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*
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* Just copies the address portion and family. Ignores port, scope, etc.
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* Caller is responsible for making certain that dst is large enough to hold
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* the address in src. Returns true if address family is supported. Returns
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* false otherwise.
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*/
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static inline bool rpc_copy_addr(struct sockaddr *dst,
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const struct sockaddr *src)
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{
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switch (src->sa_family) {
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case AF_INET:
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return __rpc_copy_addr4(dst, src);
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case AF_INET6:
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return __rpc_copy_addr6(dst, src);
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}
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return false;
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}
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/**
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* rpc_get_scope_id - return scopeid for a given sockaddr
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* @sa: sockaddr to get scopeid from
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*
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* Returns the value of the sin6_scope_id for AF_INET6 addrs, or 0 if
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* not an AF_INET6 address.
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*/
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static inline u32 rpc_get_scope_id(const struct sockaddr *sa)
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{
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if (sa->sa_family != AF_INET6)
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return 0;
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return ((struct sockaddr_in6 *) sa)->sin6_scope_id;
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}
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#endif /* __KERNEL__ */
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#endif /* _LINUX_SUNRPC_CLNT_H */
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