diff options
Diffstat (limited to 'libdde_linux26/contrib/include/linux/sunrpc/svc.h')
| -rw-r--r-- | libdde_linux26/contrib/include/linux/sunrpc/svc.h | 425 |
1 files changed, 0 insertions, 425 deletions
diff --git a/libdde_linux26/contrib/include/linux/sunrpc/svc.h b/libdde_linux26/contrib/include/linux/sunrpc/svc.h deleted file mode 100644 index 3435d24b..00000000 --- a/libdde_linux26/contrib/include/linux/sunrpc/svc.h +++ /dev/null @@ -1,425 +0,0 @@ -/* - * linux/include/linux/sunrpc/svc.h - * - * RPC server declarations. - * - * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> - */ - - -#ifndef SUNRPC_SVC_H -#define SUNRPC_SVC_H - -#include <linux/in.h> -#include <linux/in6.h> -#include <linux/sunrpc/types.h> -#include <linux/sunrpc/xdr.h> -#include <linux/sunrpc/auth.h> -#include <linux/sunrpc/svcauth.h> -#include <linux/wait.h> -#include <linux/mm.h> - -/* - * This is the RPC server thread function prototype - */ -typedef int (*svc_thread_fn)(void *); - -/* - * - * RPC service thread pool. - * - * Pool of threads and temporary sockets. Generally there is only - * a single one of these per RPC service, but on NUMA machines those - * services that can benefit from it (i.e. nfs but not lockd) will - * have one pool per NUMA node. This optimisation reduces cross- - * node traffic on multi-node NUMA NFS servers. - */ -struct svc_pool { - unsigned int sp_id; /* pool id; also node id on NUMA */ - spinlock_t sp_lock; /* protects all fields */ - struct list_head sp_threads; /* idle server threads */ - struct list_head sp_sockets; /* pending sockets */ - unsigned int sp_nrthreads; /* # of threads in pool */ - struct list_head sp_all_threads; /* all server threads */ -} ____cacheline_aligned_in_smp; - -/* - * RPC service. - * - * An RPC service is a ``daemon,'' possibly multithreaded, which - * receives and processes incoming RPC messages. - * It has one or more transport sockets associated with it, and maintains - * a list of idle threads waiting for input. - * - * We currently do not support more than one RPC program per daemon. - */ -struct svc_serv { - struct svc_program * sv_program; /* RPC program */ - struct svc_stat * sv_stats; /* RPC statistics */ - spinlock_t sv_lock; - unsigned int sv_nrthreads; /* # of server threads */ - unsigned int sv_maxconn; /* max connections allowed or - * '0' causing max to be based - * on number of threads. */ - - unsigned int sv_max_payload; /* datagram payload size */ - unsigned int sv_max_mesg; /* max_payload + 1 page for overheads */ - unsigned int sv_xdrsize; /* XDR buffer size */ - struct list_head sv_permsocks; /* all permanent sockets */ - struct list_head sv_tempsocks; /* all temporary sockets */ - int sv_tmpcnt; /* count of temporary sockets */ - struct timer_list sv_temptimer; /* timer for aging temporary sockets */ - sa_family_t sv_family; /* listener's address family */ - - char * sv_name; /* service name */ - - unsigned int sv_nrpools; /* number of thread pools */ - struct svc_pool * sv_pools; /* array of thread pools */ - - void (*sv_shutdown)(struct svc_serv *serv); - /* Callback to use when last thread - * exits. - */ - - struct module * sv_module; /* optional module to count when - * adding threads */ - svc_thread_fn sv_function; /* main function for threads */ -}; - -/* - * We use sv_nrthreads as a reference count. svc_destroy() drops - * this refcount, so we need to bump it up around operations that - * change the number of threads. Horrible, but there it is. - * Should be called with the BKL held. - */ -static inline void svc_get(struct svc_serv *serv) -{ - serv->sv_nrthreads++; -} - -/* - * Maximum payload size supported by a kernel RPC server. - * This is use to determine the max number of pages nfsd is - * willing to return in a single READ operation. - * - * These happen to all be powers of 2, which is not strictly - * necessary but helps enforce the real limitation, which is - * that they should be multiples of PAGE_CACHE_SIZE. - * - * For UDP transports, a block plus NFS,RPC, and UDP headers - * has to fit into the IP datagram limit of 64K. The largest - * feasible number for all known page sizes is probably 48K, - * but we choose 32K here. This is the same as the historical - * Linux limit; someone who cares more about NFS/UDP performance - * can test a larger number. - * - * For TCP transports we have more freedom. A size of 1MB is - * chosen to match the client limit. Other OSes are known to - * have larger limits, but those numbers are probably beyond - * the point of diminishing returns. - */ -#define RPCSVC_MAXPAYLOAD (1*1024*1024u) -#define RPCSVC_MAXPAYLOAD_TCP RPCSVC_MAXPAYLOAD -#define RPCSVC_MAXPAYLOAD_UDP (32*1024u) - -extern u32 svc_max_payload(const struct svc_rqst *rqstp); - -/* - * RPC Requsts and replies are stored in one or more pages. - * We maintain an array of pages for each server thread. - * Requests are copied into these pages as they arrive. Remaining - * pages are available to write the reply into. - * - * Pages are sent using ->sendpage so each server thread needs to - * allocate more to replace those used in sending. To help keep track - * of these pages we have a receive list where all pages initialy live, - * and a send list where pages are moved to when there are to be part - * of a reply. - * - * We use xdr_buf for holding responses as it fits well with NFS - * read responses (that have a header, and some data pages, and possibly - * a tail) and means we can share some client side routines. - * - * The xdr_buf.head kvec always points to the first page in the rq_*pages - * list. The xdr_buf.pages pointer points to the second page on that - * list. xdr_buf.tail points to the end of the first page. - * This assumes that the non-page part of an rpc reply will fit - * in a page - NFSd ensures this. lockd also has no trouble. - * - * Each request/reply pair can have at most one "payload", plus two pages, - * one for the request, and one for the reply. - * We using ->sendfile to return read data, we might need one extra page - * if the request is not page-aligned. So add another '1'. - */ -#define RPCSVC_MAXPAGES ((RPCSVC_MAXPAYLOAD+PAGE_SIZE-1)/PAGE_SIZE \ - + 2 + 1) - -static inline u32 svc_getnl(struct kvec *iov) -{ - __be32 val, *vp; - vp = iov->iov_base; - val = *vp++; - iov->iov_base = (void*)vp; - iov->iov_len -= sizeof(__be32); - return ntohl(val); -} - -static inline void svc_putnl(struct kvec *iov, u32 val) -{ - __be32 *vp = iov->iov_base + iov->iov_len; - *vp = htonl(val); - iov->iov_len += sizeof(__be32); -} - -static inline __be32 svc_getu32(struct kvec *iov) -{ - __be32 val, *vp; - vp = iov->iov_base; - val = *vp++; - iov->iov_base = (void*)vp; - iov->iov_len -= sizeof(__be32); - return val; -} - -static inline void svc_ungetu32(struct kvec *iov) -{ - __be32 *vp = (__be32 *)iov->iov_base; - iov->iov_base = (void *)(vp - 1); - iov->iov_len += sizeof(*vp); -} - -static inline void svc_putu32(struct kvec *iov, __be32 val) -{ - __be32 *vp = iov->iov_base + iov->iov_len; - *vp = val; - iov->iov_len += sizeof(__be32); -} - -union svc_addr_u { - struct in_addr addr; - struct in6_addr addr6; -}; - -/* - * The context of a single thread, including the request currently being - * processed. - */ -struct svc_rqst { - struct list_head rq_list; /* idle list */ - struct list_head rq_all; /* all threads list */ - struct svc_xprt * rq_xprt; /* transport ptr */ - struct sockaddr_storage rq_addr; /* peer address */ - size_t rq_addrlen; - - struct svc_serv * rq_server; /* RPC service definition */ - struct svc_pool * rq_pool; /* thread pool */ - struct svc_procedure * rq_procinfo; /* procedure info */ - struct auth_ops * rq_authop; /* authentication flavour */ - u32 rq_flavor; /* pseudoflavor */ - struct svc_cred rq_cred; /* auth info */ - void * rq_xprt_ctxt; /* transport specific context ptr */ - struct svc_deferred_req*rq_deferred; /* deferred request we are replaying */ - - size_t rq_xprt_hlen; /* xprt header len */ - struct xdr_buf rq_arg; - struct xdr_buf rq_res; - struct page * rq_pages[RPCSVC_MAXPAGES]; - struct page * *rq_respages; /* points into rq_pages */ - int rq_resused; /* number of pages used for result */ - - struct kvec rq_vec[RPCSVC_MAXPAGES]; /* generally useful.. */ - - __be32 rq_xid; /* transmission id */ - u32 rq_prog; /* program number */ - u32 rq_vers; /* program version */ - u32 rq_proc; /* procedure number */ - u32 rq_prot; /* IP protocol */ - unsigned short - rq_secure : 1; /* secure port */ - - union svc_addr_u rq_daddr; /* dest addr of request - * - reply from here */ - - void * rq_argp; /* decoded arguments */ - void * rq_resp; /* xdr'd results */ - void * rq_auth_data; /* flavor-specific data */ - - int rq_reserved; /* space on socket outq - * reserved for this request - */ - - struct cache_req rq_chandle; /* handle passed to caches for - * request delaying - */ - /* Catering to nfsd */ - struct auth_domain * rq_client; /* RPC peer info */ - struct auth_domain * rq_gssclient; /* "gss/"-style peer info */ - struct svc_cacherep * rq_cacherep; /* cache info */ - struct knfsd_fh * rq_reffh; /* Referrence filehandle, used to - * determine what device number - * to report (real or virtual) - */ - int rq_splice_ok; /* turned off in gss privacy - * to prevent encrypting page - * cache pages */ - wait_queue_head_t rq_wait; /* synchronization */ - struct task_struct *rq_task; /* service thread */ -}; - -/* - * Rigorous type checking on sockaddr type conversions - */ -static inline struct sockaddr_in *svc_addr_in(const struct svc_rqst *rqst) -{ - return (struct sockaddr_in *) &rqst->rq_addr; -} - -static inline struct sockaddr_in6 *svc_addr_in6(const struct svc_rqst *rqst) -{ - return (struct sockaddr_in6 *) &rqst->rq_addr; -} - -static inline struct sockaddr *svc_addr(const struct svc_rqst *rqst) -{ - return (struct sockaddr *) &rqst->rq_addr; -} - -/* - * Check buffer bounds after decoding arguments - */ -static inline int -xdr_argsize_check(struct svc_rqst *rqstp, __be32 *p) -{ - char *cp = (char *)p; - struct kvec *vec = &rqstp->rq_arg.head[0]; - return cp >= (char*)vec->iov_base - && cp <= (char*)vec->iov_base + vec->iov_len; -} - -static inline int -xdr_ressize_check(struct svc_rqst *rqstp, __be32 *p) -{ - struct kvec *vec = &rqstp->rq_res.head[0]; - char *cp = (char*)p; - - vec->iov_len = cp - (char*)vec->iov_base; - - return vec->iov_len <= PAGE_SIZE; -} - -static inline void svc_free_res_pages(struct svc_rqst *rqstp) -{ - while (rqstp->rq_resused) { - struct page **pp = (rqstp->rq_respages + - --rqstp->rq_resused); - if (*pp) { - put_page(*pp); - *pp = NULL; - } - } -} - -struct svc_deferred_req { - u32 prot; /* protocol (UDP or TCP) */ - struct svc_xprt *xprt; - struct sockaddr_storage addr; /* where reply must go */ - size_t addrlen; - union svc_addr_u daddr; /* where reply must come from */ - struct cache_deferred_req handle; - size_t xprt_hlen; - int argslen; - __be32 args[0]; -}; - -/* - * List of RPC programs on the same transport endpoint - */ -struct svc_program { - struct svc_program * pg_next; /* other programs (same xprt) */ - u32 pg_prog; /* program number */ - unsigned int pg_lovers; /* lowest version */ - unsigned int pg_hivers; /* lowest version */ - unsigned int pg_nvers; /* number of versions */ - struct svc_version ** pg_vers; /* version array */ - char * pg_name; /* service name */ - char * pg_class; /* class name: services sharing authentication */ - struct svc_stat * pg_stats; /* rpc statistics */ - int (*pg_authenticate)(struct svc_rqst *); -}; - -/* - * RPC program version - */ -struct svc_version { - u32 vs_vers; /* version number */ - u32 vs_nproc; /* number of procedures */ - struct svc_procedure * vs_proc; /* per-procedure info */ - u32 vs_xdrsize; /* xdrsize needed for this version */ - - unsigned int vs_hidden : 1; /* Don't register with portmapper. - * Only used for nfsacl so far. */ - - /* Override dispatch function (e.g. when caching replies). - * A return value of 0 means drop the request. - * vs_dispatch == NULL means use default dispatcher. - */ - int (*vs_dispatch)(struct svc_rqst *, __be32 *); -}; - -/* - * RPC procedure info - */ -typedef __be32 (*svc_procfunc)(struct svc_rqst *, void *argp, void *resp); -struct svc_procedure { - svc_procfunc pc_func; /* process the request */ - kxdrproc_t pc_decode; /* XDR decode args */ - kxdrproc_t pc_encode; /* XDR encode result */ - kxdrproc_t pc_release; /* XDR free result */ - unsigned int pc_argsize; /* argument struct size */ - unsigned int pc_ressize; /* result struct size */ - unsigned int pc_count; /* call count */ - unsigned int pc_cachetype; /* cache info (NFS) */ - unsigned int pc_xdrressize; /* maximum size of XDR reply */ -}; - -/* - * Function prototypes. - */ -struct svc_serv *svc_create(struct svc_program *, unsigned int, sa_family_t, - void (*shutdown)(struct svc_serv *)); -struct svc_rqst *svc_prepare_thread(struct svc_serv *serv, - struct svc_pool *pool); -void svc_exit_thread(struct svc_rqst *); -struct svc_serv * svc_create_pooled(struct svc_program *, unsigned int, - sa_family_t, void (*shutdown)(struct svc_serv *), - svc_thread_fn, struct module *); -int svc_set_num_threads(struct svc_serv *, struct svc_pool *, int); -void svc_destroy(struct svc_serv *); -int svc_process(struct svc_rqst *); -int svc_register(const struct svc_serv *, const unsigned short, - const unsigned short); - -void svc_wake_up(struct svc_serv *); -void svc_reserve(struct svc_rqst *rqstp, int space); -struct svc_pool * svc_pool_for_cpu(struct svc_serv *serv, int cpu); -char * svc_print_addr(struct svc_rqst *, char *, size_t); - -#define RPC_MAX_ADDRBUFLEN (63U) - -/* - * When we want to reduce the size of the reserved space in the response - * buffer, we need to take into account the size of any checksum data that - * may be at the end of the packet. This is difficult to determine exactly - * for all cases without actually generating the checksum, so we just use a - * static value. - */ -static inline void svc_reserve_auth(struct svc_rqst *rqstp, int space) -{ - int added_space = 0; - - if (rqstp->rq_authop->flavour) - added_space = RPC_MAX_AUTH_SIZE; - svc_reserve(rqstp, space + added_space); -} - -#endif /* SUNRPC_SVC_H */ |