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Diffstat (limited to 'sys/nfsserver/nfs_srvcache.c')
-rw-r--r--sys/nfsserver/nfs_srvcache.c340
1 files changed, 0 insertions, 340 deletions
diff --git a/sys/nfsserver/nfs_srvcache.c b/sys/nfsserver/nfs_srvcache.c
deleted file mode 100644
index b5adf4a74bd9..000000000000
--- a/sys/nfsserver/nfs_srvcache.c
+++ /dev/null
@@ -1,340 +0,0 @@
-/*
- * Copyright (c) 1989, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Rick Macklem at The University of Guelph.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)nfs_srvcache.c 8.3 (Berkeley) 3/30/95
- * $Id: nfs_srvcache.c,v 1.16 1998/02/09 06:10:36 eivind Exp $
- */
-
-/*
- * Reference: Chet Juszczak, "Improving the Performance and Correctness
- * of an NFS Server", in Proc. Winter 1989 USENIX Conference,
- * pages 53-63. San Diego, February 1989.
- */
-#include <sys/param.h>
-#include <sys/malloc.h>
-#include <sys/mount.h>
-#include <sys/systm.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h> /* for dup_sockaddr */
-
-#include <netinet/in.h>
-#ifdef ISO
-#include <netiso/iso.h>
-#endif
-#include <nfs/rpcv2.h>
-#include <nfs/nfsproto.h>
-#include <nfs/nfs.h>
-#include <nfs/nfsrvcache.h>
-
-#ifndef NFS_NOSERVER
-extern struct nfsstats nfsstats;
-extern int nfsv2_procid[NFS_NPROCS];
-static long numnfsrvcache;
-static long desirednfsrvcache = NFSRVCACHESIZ;
-
-#define NFSRCHASH(xid) \
- (&nfsrvhashtbl[((xid) + ((xid) >> 24)) & nfsrvhash])
-static LIST_HEAD(nfsrvhash, nfsrvcache) *nfsrvhashtbl;
-static TAILQ_HEAD(nfsrvlru, nfsrvcache) nfsrvlruhead;
-static u_long nfsrvhash;
-
-#define TRUE 1
-#define FALSE 0
-
-#define NETFAMILY(rp) \
- (((rp)->rc_flag & RC_INETADDR) ? AF_INET : AF_ISO)
-
-/*
- * Static array that defines which nfs rpc's are nonidempotent
- */
-static int nonidempotent[NFS_NPROCS] = {
- FALSE,
- FALSE,
- TRUE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- TRUE,
- TRUE,
- TRUE,
- TRUE,
- TRUE,
- TRUE,
- TRUE,
- TRUE,
- TRUE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
-};
-
-/* True iff the rpc reply is an nfs status ONLY! */
-static int nfsv2_repstat[NFS_NPROCS] = {
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- FALSE,
- TRUE,
- TRUE,
- TRUE,
- TRUE,
- FALSE,
- TRUE,
- FALSE,
- FALSE,
-};
-
-/*
- * Initialize the server request cache list
- */
-void
-nfsrv_initcache()
-{
-
- nfsrvhashtbl = hashinit(desirednfsrvcache, M_NFSD, &nfsrvhash);
- TAILQ_INIT(&nfsrvlruhead);
-}
-
-/*
- * Look for the request in the cache
- * If found then
- * return action and optionally reply
- * else
- * insert it in the cache
- *
- * The rules are as follows:
- * - if in progress, return DROP request
- * - if completed within DELAY of the current time, return DROP it
- * - if completed a longer time ago return REPLY if the reply was cached or
- * return DOIT
- * Update/add new request at end of lru list
- */
-int
-nfsrv_getcache(nd, slp, repp)
- register struct nfsrv_descript *nd;
- struct nfssvc_sock *slp;
- struct mbuf **repp;
-{
- register struct nfsrvcache *rp;
- struct mbuf *mb;
- struct sockaddr_in *saddr;
- caddr_t bpos;
- int ret;
-
- /*
- * Don't cache recent requests for reliable transport protocols.
- * (Maybe we should for the case of a reconnect, but..)
- */
- if (!nd->nd_nam2)
- return (RC_DOIT);
-loop:
- for (rp = NFSRCHASH(nd->nd_retxid)->lh_first; rp != 0;
- rp = rp->rc_hash.le_next) {
- if (nd->nd_retxid == rp->rc_xid && nd->nd_procnum == rp->rc_proc &&
- netaddr_match(NETFAMILY(rp), &rp->rc_haddr, nd->nd_nam)) {
- NFS_DPF(RC, ("H%03x", rp->rc_xid & 0xfff));
- if ((rp->rc_flag & RC_LOCKED) != 0) {
- rp->rc_flag |= RC_WANTED;
- (void) tsleep((caddr_t)rp, PZERO-1, "nfsrc", 0);
- goto loop;
- }
- rp->rc_flag |= RC_LOCKED;
- /* If not at end of LRU chain, move it there */
- if (rp->rc_lru.tqe_next) {
- TAILQ_REMOVE(&nfsrvlruhead, rp, rc_lru);
- TAILQ_INSERT_TAIL(&nfsrvlruhead, rp, rc_lru);
- }
- if (rp->rc_state == RC_UNUSED)
- panic("nfsrv cache");
- if (rp->rc_state == RC_INPROG) {
- nfsstats.srvcache_inproghits++;
- ret = RC_DROPIT;
- } else if (rp->rc_flag & RC_REPSTATUS) {
- nfsstats.srvcache_nonidemdonehits++;
- nfs_rephead(0, nd, slp, rp->rc_status,
- 0, (u_quad_t *)0, repp, &mb, &bpos);
- ret = RC_REPLY;
- } else if (rp->rc_flag & RC_REPMBUF) {
- nfsstats.srvcache_nonidemdonehits++;
- *repp = m_copym(rp->rc_reply, 0, M_COPYALL,
- M_WAIT);
- ret = RC_REPLY;
- } else {
- nfsstats.srvcache_idemdonehits++;
- rp->rc_state = RC_INPROG;
- ret = RC_DOIT;
- }
- rp->rc_flag &= ~RC_LOCKED;
- if (rp->rc_flag & RC_WANTED) {
- rp->rc_flag &= ~RC_WANTED;
- wakeup((caddr_t)rp);
- }
- return (ret);
- }
- }
- nfsstats.srvcache_misses++;
- NFS_DPF(RC, ("M%03x", nd->nd_retxid & 0xfff));
- if (numnfsrvcache < desirednfsrvcache) {
- rp = (struct nfsrvcache *)malloc((u_long)sizeof *rp,
- M_NFSD, M_WAITOK);
- bzero((char *)rp, sizeof *rp);
- numnfsrvcache++;
- rp->rc_flag = RC_LOCKED;
- } else {
- rp = nfsrvlruhead.tqh_first;
- while ((rp->rc_flag & RC_LOCKED) != 0) {
- rp->rc_flag |= RC_WANTED;
- (void) tsleep((caddr_t)rp, PZERO-1, "nfsrc", 0);
- rp = nfsrvlruhead.tqh_first;
- }
- rp->rc_flag |= RC_LOCKED;
- LIST_REMOVE(rp, rc_hash);
- TAILQ_REMOVE(&nfsrvlruhead, rp, rc_lru);
- if (rp->rc_flag & RC_REPMBUF)
- m_freem(rp->rc_reply);
- if (rp->rc_flag & RC_NAM)
- FREE(rp->rc_nam, M_SONAME);
- rp->rc_flag &= (RC_LOCKED | RC_WANTED);
- }
- TAILQ_INSERT_TAIL(&nfsrvlruhead, rp, rc_lru);
- rp->rc_state = RC_INPROG;
- rp->rc_xid = nd->nd_retxid;
- saddr = (struct sockaddr_in *)nd->nd_nam;
- switch (saddr->sin_family) {
- case AF_INET:
- rp->rc_flag |= RC_INETADDR;
- rp->rc_inetaddr = saddr->sin_addr.s_addr;
- break;
- case AF_ISO:
- default:
- rp->rc_flag |= RC_NAM;
- rp->rc_nam = dup_sockaddr(nd->nd_nam, 1);
- break;
- };
- rp->rc_proc = nd->nd_procnum;
- LIST_INSERT_HEAD(NFSRCHASH(nd->nd_retxid), rp, rc_hash);
- rp->rc_flag &= ~RC_LOCKED;
- if (rp->rc_flag & RC_WANTED) {
- rp->rc_flag &= ~RC_WANTED;
- wakeup((caddr_t)rp);
- }
- return (RC_DOIT);
-}
-
-/*
- * Update a request cache entry after the rpc has been done
- */
-void
-nfsrv_updatecache(nd, repvalid, repmbuf)
- register struct nfsrv_descript *nd;
- int repvalid;
- struct mbuf *repmbuf;
-{
- register struct nfsrvcache *rp;
-
- if (!nd->nd_nam2)
- return;
-loop:
- for (rp = NFSRCHASH(nd->nd_retxid)->lh_first; rp != 0;
- rp = rp->rc_hash.le_next) {
- if (nd->nd_retxid == rp->rc_xid && nd->nd_procnum == rp->rc_proc &&
- netaddr_match(NETFAMILY(rp), &rp->rc_haddr, nd->nd_nam)) {
- NFS_DPF(RC, ("U%03x", rp->rc_xid & 0xfff));
- if ((rp->rc_flag & RC_LOCKED) != 0) {
- rp->rc_flag |= RC_WANTED;
- (void) tsleep((caddr_t)rp, PZERO-1, "nfsrc", 0);
- goto loop;
- }
- rp->rc_flag |= RC_LOCKED;
- rp->rc_state = RC_DONE;
- /*
- * If we have a valid reply update status and save
- * the reply for non-idempotent rpc's.
- */
- if (repvalid && nonidempotent[nd->nd_procnum]) {
- if ((nd->nd_flag & ND_NFSV3) == 0 &&
- nfsv2_repstat[nfsv2_procid[nd->nd_procnum]]) {
- rp->rc_status = nd->nd_repstat;
- rp->rc_flag |= RC_REPSTATUS;
- } else {
- rp->rc_reply = m_copym(repmbuf,
- 0, M_COPYALL, M_WAIT);
- rp->rc_flag |= RC_REPMBUF;
- }
- }
- rp->rc_flag &= ~RC_LOCKED;
- if (rp->rc_flag & RC_WANTED) {
- rp->rc_flag &= ~RC_WANTED;
- wakeup((caddr_t)rp);
- }
- return;
- }
- }
- NFS_DPF(RC, ("L%03x", nd->nd_retxid & 0xfff));
-}
-
-/*
- * Clean out the cache. Called when the last nfsd terminates.
- */
-void
-nfsrv_cleancache()
-{
- register struct nfsrvcache *rp, *nextrp;
-
- for (rp = nfsrvlruhead.tqh_first; rp != 0; rp = nextrp) {
- nextrp = rp->rc_lru.tqe_next;
- LIST_REMOVE(rp, rc_hash);
- TAILQ_REMOVE(&nfsrvlruhead, rp, rc_lru);
- free(rp, M_NFSD);
- }
- numnfsrvcache = 0;
-}
-
-#endif /* NFS_NOSERVER */
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