Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
new file mode 100644
index 0000000..3700397
--- /dev/null
+++ b/include/linux/sunrpc/svc.h
@@ -0,0 +1,306 @@
+/*
+ * 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/sunrpc/types.h>
+#include <linux/sunrpc/xdr.h>
+#include <linux/sunrpc/svcauth.h>
+#include <linux/wait.h>
+#include <linux/mm.h>
+
+/*
+ * 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 list_head sv_threads; /* idle server threads */
+ struct list_head sv_sockets; /* pending sockets */
+ 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_bufsz; /* datagram buffer size */
+ 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 */
+
+ char * sv_name; /* service name */
+};
+
+/*
+ * 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.
+ */
+#define RPCSVC_MAXPAYLOAD (64*1024u)
+
+/*
+ * 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.
+ */
+#define RPCSVC_MAXPAGES ((RPCSVC_MAXPAYLOAD+PAGE_SIZE-1)/PAGE_SIZE + 2)
+
+static inline u32 svc_getu32(struct kvec *iov)
+{
+ u32 val, *vp;
+ vp = iov->iov_base;
+ val = *vp++;
+ iov->iov_base = (void*)vp;
+ iov->iov_len -= sizeof(u32);
+ return val;
+}
+
+static inline void svc_ungetu32(struct kvec *iov)
+{
+ u32 *vp = (u32 *)iov->iov_base;
+ iov->iov_base = (void *)(vp - 1);
+ iov->iov_len += sizeof(*vp);
+}
+
+static inline void svc_putu32(struct kvec *iov, u32 val)
+{
+ u32 *vp = iov->iov_base + iov->iov_len;
+ *vp = val;
+ iov->iov_len += sizeof(u32);
+}
+
+
+/*
+ * The context of a single thread, including the request currently being
+ * processed.
+ * NOTE: First two items must be prev/next.
+ */
+struct svc_rqst {
+ struct list_head rq_list; /* idle list */
+ struct svc_sock * rq_sock; /* socket */
+ struct sockaddr_in rq_addr; /* peer address */
+ int rq_addrlen;
+
+ struct svc_serv * rq_server; /* RPC service definition */
+ struct svc_procedure * rq_procinfo; /* procedure info */
+ struct auth_ops * rq_authop; /* authentication flavour */
+ struct svc_cred rq_cred; /* auth info */
+ struct sk_buff * rq_skbuff; /* fast recv inet buffer */
+ struct svc_deferred_req*rq_deferred; /* deferred request we are replaying */
+
+ struct xdr_buf rq_arg;
+ struct xdr_buf rq_res;
+ struct page * rq_argpages[RPCSVC_MAXPAGES];
+ struct page * rq_respages[RPCSVC_MAXPAGES];
+ int rq_restailpage;
+ short rq_argused; /* pages used for argument */
+ short rq_arghi; /* pages available in argument page list */
+ short rq_resused; /* pages used for result */
+
+ u32 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 */
+
+
+ __u32 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 svc_cacherep * rq_cacherep; /* cache info */
+ struct knfsd_fh * rq_reffh; /* Referrence filehandle, used to
+ * determine what device number
+ * to report (real or virtual)
+ */
+
+ wait_queue_head_t rq_wait; /* synchronization */
+};
+
+/*
+ * Check buffer bounds after decoding arguments
+ */
+static inline int
+xdr_argsize_check(struct svc_rqst *rqstp, u32 *p)
+{
+ char *cp = (char *)p;
+ struct kvec *vec = &rqstp->rq_arg.head[0];
+ return cp - (char*)vec->iov_base <= vec->iov_len;
+}
+
+static inline int
+xdr_ressize_check(struct svc_rqst *rqstp, u32 *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 int svc_take_page(struct svc_rqst *rqstp)
+{
+ if (rqstp->rq_arghi <= rqstp->rq_argused)
+ return -ENOMEM;
+ rqstp->rq_arghi--;
+ rqstp->rq_respages[rqstp->rq_resused] =
+ rqstp->rq_argpages[rqstp->rq_arghi];
+ rqstp->rq_resused++;
+ return 0;
+}
+
+static inline void svc_pushback_allpages(struct svc_rqst *rqstp)
+{
+ while (rqstp->rq_resused) {
+ if (rqstp->rq_respages[--rqstp->rq_resused] == NULL)
+ continue;
+ rqstp->rq_argpages[rqstp->rq_arghi++] =
+ rqstp->rq_respages[rqstp->rq_resused];
+ rqstp->rq_respages[rqstp->rq_resused] = NULL;
+ }
+}
+
+static inline void svc_pushback_unused_pages(struct svc_rqst *rqstp)
+{
+ while (rqstp->rq_resused &&
+ rqstp->rq_res.pages != &rqstp->rq_respages[rqstp->rq_resused]) {
+
+ if (rqstp->rq_respages[--rqstp->rq_resused] != NULL) {
+ rqstp->rq_argpages[rqstp->rq_arghi++] =
+ rqstp->rq_respages[rqstp->rq_resused];
+ rqstp->rq_respages[rqstp->rq_resused] = NULL;
+ }
+ }
+}
+
+static inline void svc_free_allpages(struct svc_rqst *rqstp)
+{
+ while (rqstp->rq_resused) {
+ if (rqstp->rq_respages[--rqstp->rq_resused] == NULL)
+ continue;
+ put_page(rqstp->rq_respages[rqstp->rq_resused]);
+ rqstp->rq_respages[rqstp->rq_resused] = NULL;
+ }
+}
+
+struct svc_deferred_req {
+ u32 prot; /* protocol (UDP or TCP) */
+ struct sockaddr_in addr;
+ struct svc_sock *svsk; /* where reply must go */
+ struct cache_deferred_req handle;
+ int argslen;
+ u32 args[0];
+};
+
+/*
+ * RPC program
+ */
+struct svc_program {
+ 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 */
+
+ /* 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 *, u32 *);
+};
+
+/*
+ * RPC procedure info
+ */
+typedef int (*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 */
+};
+
+/*
+ * This is the RPC server thread function prototype
+ */
+typedef void (*svc_thread_fn)(struct svc_rqst *);
+
+/*
+ * Function prototypes.
+ */
+struct svc_serv * svc_create(struct svc_program *, unsigned int);
+int svc_create_thread(svc_thread_fn, struct svc_serv *);
+void svc_exit_thread(struct svc_rqst *);
+void svc_destroy(struct svc_serv *);
+int svc_process(struct svc_serv *, struct svc_rqst *);
+int svc_register(struct svc_serv *, int, unsigned short);
+void svc_wake_up(struct svc_serv *);
+void svc_reserve(struct svc_rqst *rqstp, int space);
+
+#endif /* SUNRPC_SVC_H */