+/*
+ * Copyright (c) 1989 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_vnops.c 7.60 (Berkeley) 5/24/91
+ */
+
+/*
+ * vnode op calls for sun nfs version 2
+ */
+
+#include "param.h"
+#include "proc.h"
+#include "kernel.h"
+#include "systm.h"
+#include "mount.h"
+#include "buf.h"
+#include "malloc.h"
+#include "mbuf.h"
+#include "conf.h"
+#include "namei.h"
+#include "vnode.h"
+#include "specdev.h"
+#include "fifo.h"
+
+#include "../ufs/quota.h"
+#include "../ufs/inode.h"
+#include "../ufs/dir.h"
+
+#include "nfsv2.h"
+#include "nfs.h"
+#include "nfsnode.h"
+#include "nfsmount.h"
+#include "xdr_subs.h"
+#include "nfsm_subs.h"
+#include "nfsiom.h"
+
+/* Defs */
+#define TRUE 1
+#define FALSE 0
+
+/*
+ * Global vfs data structures for nfs
+ */
+struct vnodeops nfsv2_vnodeops = {
+ nfs_lookup, /* lookup */
+ nfs_create, /* create */
+ nfs_mknod, /* mknod */
+ nfs_open, /* open */
+ nfs_close, /* close */
+ nfs_access, /* access */
+ nfs_getattr, /* getattr */
+ nfs_setattr, /* setattr */
+ nfs_read, /* read */
+ nfs_write, /* write */
+ nfs_ioctl, /* ioctl */
+ nfs_select, /* select */
+ nfs_mmap, /* mmap */
+ nfs_fsync, /* fsync */
+ nfs_seek, /* seek */
+ nfs_remove, /* remove */
+ nfs_link, /* link */
+ nfs_rename, /* rename */
+ nfs_mkdir, /* mkdir */
+ nfs_rmdir, /* rmdir */
+ nfs_symlink, /* symlink */
+ nfs_readdir, /* readdir */
+ nfs_readlink, /* readlink */
+ nfs_abortop, /* abortop */
+ nfs_inactive, /* inactive */
+ nfs_reclaim, /* reclaim */
+ nfs_lock, /* lock */
+ nfs_unlock, /* unlock */
+ nfs_bmap, /* bmap */
+ nfs_strategy, /* strategy */
+ nfs_print, /* print */
+ nfs_islocked, /* islocked */
+ nfs_advlock, /* advlock */
+};
+
+/*
+ * Special device vnode ops
+ */
+struct vnodeops spec_nfsv2nodeops = {
+ spec_lookup, /* lookup */
+ spec_create, /* create */
+ spec_mknod, /* mknod */
+ spec_open, /* open */
+ spec_close, /* close */
+ nfs_access, /* access */
+ nfs_getattr, /* getattr */
+ nfs_setattr, /* setattr */
+ spec_read, /* read */
+ spec_write, /* write */
+ spec_ioctl, /* ioctl */
+ spec_select, /* select */
+ spec_mmap, /* mmap */
+ spec_fsync, /* fsync */
+ spec_seek, /* seek */
+ spec_remove, /* remove */
+ spec_link, /* link */
+ spec_rename, /* rename */
+ spec_mkdir, /* mkdir */
+ spec_rmdir, /* rmdir */
+ spec_symlink, /* symlink */
+ spec_readdir, /* readdir */
+ spec_readlink, /* readlink */
+ spec_abortop, /* abortop */
+ nfs_inactive, /* inactive */
+ nfs_reclaim, /* reclaim */
+ nfs_lock, /* lock */
+ nfs_unlock, /* unlock */
+ spec_bmap, /* bmap */
+ spec_strategy, /* strategy */
+ nfs_print, /* print */
+ nfs_islocked, /* islocked */
+ spec_advlock, /* advlock */
+};
+
+#ifdef FIFO
+struct vnodeops fifo_nfsv2nodeops = {
+ fifo_lookup, /* lookup */
+ fifo_create, /* create */
+ fifo_mknod, /* mknod */
+ fifo_open, /* open */
+ fifo_close, /* close */
+ nfs_access, /* access */
+ nfs_getattr, /* getattr */
+ nfs_setattr, /* setattr */
+ fifo_read, /* read */
+ fifo_write, /* write */
+ fifo_ioctl, /* ioctl */
+ fifo_select, /* select */
+ fifo_mmap, /* mmap */
+ fifo_fsync, /* fsync */
+ fifo_seek, /* seek */
+ fifo_remove, /* remove */
+ fifo_link, /* link */
+ fifo_rename, /* rename */
+ fifo_mkdir, /* mkdir */
+ fifo_rmdir, /* rmdir */
+ fifo_symlink, /* symlink */
+ fifo_readdir, /* readdir */
+ fifo_readlink, /* readlink */
+ fifo_abortop, /* abortop */
+ nfs_inactive, /* inactive */
+ nfs_reclaim, /* reclaim */
+ nfs_lock, /* lock */
+ nfs_unlock, /* unlock */
+ fifo_bmap, /* bmap */
+ fifo_badop, /* strategy */
+ nfs_print, /* print */
+ nfs_islocked, /* islocked */
+ fifo_advlock, /* advlock */
+};
+#endif /* FIFO */
+
+/*
+ * Global vars
+ */
+extern u_long nfs_procids[NFS_NPROCS];
+extern u_long nfs_prog, nfs_vers;
+extern char nfsiobuf[MAXPHYS+NBPG];
+struct buf nfs_bqueue; /* Queue head for nfsiod's */
+struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
+int nfs_numasync = 0;
+
+/*
+ * nfs null call from vfs.
+ */
+nfs_null(vp, cred, p)
+ struct vnode *vp;
+ struct ucred *cred;
+ struct proc *p;
+{
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb;
+
+ nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0);
+ nfsm_request(vp, NFSPROC_NULL, p, 0);
+ nfsm_reqdone;
+ return (error);
+}
+
+/*
+ * nfs access vnode op.
+ * Essentially just get vattr and then imitate iaccess()
+ */
+nfs_access(vp, mode, cred, p)
+ struct vnode *vp;
+ int mode;
+ register struct ucred *cred;
+ struct proc *p;
+{
+ register struct vattr *vap;
+ register gid_t *gp;
+ struct vattr vattr;
+ register int i;
+ int error;
+
+ /*
+ * If you're the super-user,
+ * you always get access.
+ */
+ if (cred->cr_uid == 0)
+ return (0);
+ vap = &vattr;
+ if (error = nfs_dogetattr(vp, vap, cred, 0, p))
+ return (error);
+ /*
+ * Access check is based on only one of owner, group, public.
+ * If not owner, then check group. If not a member of the
+ * group, then check public access.
+ */
+ if (cred->cr_uid != vap->va_uid) {
+ mode >>= 3;
+ gp = cred->cr_groups;
+ for (i = 0; i < cred->cr_ngroups; i++, gp++)
+ if (vap->va_gid == *gp)
+ goto found;
+ mode >>= 3;
+found:
+ ;
+ }
+ if ((vap->va_mode & mode) != 0)
+ return (0);
+ return (EACCES);
+}
+
+/*
+ * nfs open vnode op
+ * Just check to see if the type is ok
+ */
+/* ARGSUSED */
+nfs_open(vp, mode, cred, p)
+ struct vnode *vp;
+ int mode;
+ struct ucred *cred;
+ struct proc *p;
+{
+ register enum vtype vtyp;
+
+ vtyp = vp->v_type;
+ if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK)
+ return (0);
+ else
+ return (EACCES);
+}
+
+/*
+ * nfs close vnode op
+ * For reg files, invalidate any buffer cache entries.
+ */
+/* ARGSUSED */
+nfs_close(vp, fflags, cred, p)
+ register struct vnode *vp;
+ int fflags;
+ struct ucred *cred;
+ struct proc *p;
+{
+ register struct nfsnode *np = VTONFS(vp);
+ int error = 0;
+
+ if (vp->v_type == VREG && (np->n_flag & NMODIFIED)) {
+ nfs_lock(vp);
+ np->n_flag &= ~NMODIFIED;
+ vinvalbuf(vp, TRUE);
+ np->n_attrstamp = 0;
+ if (np->n_flag & NWRITEERR) {
+ np->n_flag &= ~NWRITEERR;
+ error = np->n_error;
+ }
+ nfs_unlock(vp);
+ }
+ return (error);
+}
+
+/*
+ * nfs getattr call from vfs.
+ */
+nfs_getattr(vp, vap, cred, p)
+ register struct vnode *vp;
+ struct vattr *vap;
+ struct ucred *cred;
+ struct proc *p;
+{
+ return (nfs_dogetattr(vp, vap, cred, 0, p));
+}
+
+nfs_dogetattr(vp, vap, cred, tryhard, p)
+ register struct vnode *vp;
+ struct vattr *vap;
+ struct ucred *cred;
+ int tryhard;
+ struct proc *p;
+{
+ register caddr_t cp;
+ register long t1;
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+
+ /* First look in the cache.. */
+ if (nfs_getattrcache(vp, vap) == 0)
+ return (0);
+ nfsstats.rpccnt[NFSPROC_GETATTR]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH);
+ nfsm_fhtom(vp);
+ nfsm_request(vp, NFSPROC_GETATTR, p, tryhard);
+ nfsm_loadattr(vp, vap);
+ nfsm_reqdone;
+ return (error);
+}
+
+/*
+ * nfs setattr call.
+ */
+nfs_setattr(vp, vap, cred, p)
+ register struct vnode *vp;
+ register struct vattr *vap;
+ struct ucred *cred;
+ struct proc *p;
+{
+ register struct nfsv2_sattr *sp;
+ register caddr_t cp;
+ register long t1;
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+ struct nfsnode *np;
+
+ nfsstats.rpccnt[NFSPROC_SETATTR]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR);
+ nfsm_fhtom(vp);
+ nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
+ if (vap->va_mode == 0xffff)
+ sp->sa_mode = VNOVAL;
+ else
+ sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode);
+ if (vap->va_uid == 0xffff)
+ sp->sa_uid = VNOVAL;
+ else
+ sp->sa_uid = txdr_unsigned(vap->va_uid);
+ if (vap->va_gid == 0xffff)
+ sp->sa_gid = VNOVAL;
+ else
+ sp->sa_gid = txdr_unsigned(vap->va_gid);
+ sp->sa_size = txdr_unsigned(vap->va_size);
+ sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec);
+ sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags);
+ txdr_time(&vap->va_mtime, &sp->sa_mtime);
+ if (vap->va_size != VNOVAL || vap->va_mtime.tv_sec != VNOVAL ||
+ vap->va_atime.tv_sec != VNOVAL) {
+ np = VTONFS(vp);
+ if (np->n_flag & NMODIFIED) {
+ np->n_flag &= ~NMODIFIED;
+ if (vap->va_size == 0)
+ vinvalbuf(vp, FALSE);
+ else
+ vinvalbuf(vp, TRUE);
+ np->n_attrstamp = 0;
+ }
+ }
+ nfsm_request(vp, NFSPROC_SETATTR, p, 1);
+ nfsm_loadattr(vp, (struct vattr *)0);
+ /* should we fill in any vap fields ?? */
+ nfsm_reqdone;
+ return (error);
+}
+
+/*
+ * nfs lookup call, one step at a time...
+ * First look in cache
+ * If not found, unlock the directory nfsnode and do the rpc
+ */
+nfs_lookup(vp, ndp, p)
+ register struct vnode *vp;
+ register struct nameidata *ndp;
+ struct proc *p;
+{
+ register struct vnode *vdp;
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ caddr_t bpos, dpos, cp2;
+ u_long xid;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+ struct vnode *newvp;
+ long len;
+ nfsv2fh_t *fhp;
+ struct nfsnode *np;
+ int lockparent, wantparent, flag, error = 0;
+
+ ndp->ni_dvp = vp;
+ ndp->ni_vp = NULL;
+ if (vp->v_type != VDIR)
+ return (ENOTDIR);
+ lockparent = ndp->ni_nameiop & LOCKPARENT;
+ flag = ndp->ni_nameiop & OPMASK;
+ wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT);
+ if ((error = cache_lookup(ndp)) && error != ENOENT) {
+ struct vattr vattr;
+ int vpid;
+
+ vdp = ndp->ni_vp;
+ vpid = vdp->v_id;
+ /*
+ * See the comment starting `Step through' in ufs/ufs_lookup.c
+ * for an explanation of the locking protocol
+ */
+ if (vp == vdp) {
+ VREF(vdp);
+ error = 0;
+ } else if (ndp->ni_isdotdot) {
+ nfs_unlock(vp);
+ error = vget(vdp);
+ if (!error && lockparent && *ndp->ni_next == '\0')
+ nfs_lock(vp);
+ } else {
+ error = vget(vdp);
+ if (!lockparent || error || *ndp->ni_next != '\0')
+ nfs_unlock(vp);
+ }
+ if (!error) {
+ if (vpid == vdp->v_id) {
+ if (!nfs_dogetattr(vdp, &vattr, ndp->ni_cred, 0, p)&&
+ vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) {
+ nfsstats.lookupcache_hits++;
+ if (flag != LOOKUP && *ndp->ni_next == 0)
+ ndp->ni_nameiop |= SAVENAME;
+ return (0);
+ }
+ cache_purge(vdp);
+ }
+ nfs_nput(vdp);
+ if (lockparent && vdp != vp && *ndp->ni_next == '\0')
+ nfs_unlock(vp);
+ }
+ ndp->ni_vp = NULLVP;
+ } else
+ nfs_unlock(vp);
+ error = 0;
+ nfsstats.lookupcache_misses++;
+ nfsstats.rpccnt[NFSPROC_LOOKUP]++;
+ len = ndp->ni_namelen;
+ nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
+ nfsm_fhtom(vp);
+ nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN);
+ nfsm_request(vp, NFSPROC_LOOKUP, p, 0);
+nfsmout:
+ if (error) {
+ if (lockparent || (flag != CREATE && flag != RENAME) ||
+ *ndp->ni_next != 0)
+ nfs_lock(vp);
+ if (flag != LOOKUP && *ndp->ni_next == 0)
+ ndp->ni_nameiop |= SAVENAME;
+ return (error);
+ }
+ nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH);
+
+ /*
+ * Handle DELETE and RENAME cases...
+ */
+ if (flag == DELETE && *ndp->ni_next == 0) {
+ if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
+ VREF(vp);
+ newvp = vp;
+ np = VTONFS(vp);
+ } else {
+ if (error = nfs_nget(vp->v_mount, fhp, &np)) {
+ nfs_lock(vp);
+ m_freem(mrep);
+ return (error);
+ }
+ newvp = NFSTOV(np);
+ }
+ if (error =
+ nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) {
+ nfs_lock(vp);
+ if (newvp != vp)
+ nfs_nput(newvp);
+ else
+ vrele(vp);
+ m_freem(mrep);
+ return (error);
+ }
+ ndp->ni_vp = newvp;
+ if (lockparent || vp == newvp)
+ nfs_lock(vp);
+ m_freem(mrep);
+ ndp->ni_nameiop |= SAVENAME;
+ return (0);
+ }
+
+ if (flag == RENAME && wantparent && *ndp->ni_next == 0) {
+ if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
+ nfs_lock(vp);
+ m_freem(mrep);
+ return (EISDIR);
+ }
+ if (error = nfs_nget(vp->v_mount, fhp, &np)) {
+ nfs_lock(vp);
+ m_freem(mrep);
+ return (error);
+ }
+ newvp = NFSTOV(np);
+ if (error =
+ nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) {
+ nfs_lock(vp);
+ nfs_nput(newvp);
+ m_freem(mrep);
+ return (error);
+ }
+ ndp->ni_vp = newvp;
+ if (lockparent)
+ nfs_lock(vp);
+ m_freem(mrep);
+ ndp->ni_nameiop |= SAVENAME;
+ return (0);
+ }
+
+ if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
+ VREF(vp);
+ newvp = vp;
+ np = VTONFS(vp);
+ } else if (ndp->ni_isdotdot) {
+ if (error = nfs_nget(vp->v_mount, fhp, &np)) {
+ nfs_lock(vp);
+ m_freem(mrep);
+ return (error);
+ }
+ newvp = NFSTOV(np);
+ } else {
+ if (error = nfs_nget(vp->v_mount, fhp, &np)) {
+ nfs_lock(vp);
+ m_freem(mrep);
+ return (error);
+ }
+ newvp = NFSTOV(np);
+ }
+ if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) {
+ nfs_lock(vp);
+ if (newvp != vp)
+ nfs_nput(newvp);
+ else
+ vrele(vp);
+ m_freem(mrep);
+ return (error);
+ }
+ m_freem(mrep);
+
+ if (vp == newvp || (lockparent && *ndp->ni_next == '\0'))
+ nfs_lock(vp);
+ ndp->ni_vp = newvp;
+ if (flag != LOOKUP && *ndp->ni_next == 0)
+ ndp->ni_nameiop |= SAVENAME;
+ if (error == 0 && ndp->ni_makeentry) {
+ np->n_ctime = np->n_vattr.va_ctime.tv_sec;
+ cache_enter(ndp);
+ }
+ return (error);
+}
+
+/*
+ * nfs read call.
+ * Just call nfs_bioread() to do the work.
+ */
+nfs_read(vp, uiop, ioflag, cred)
+ register struct vnode *vp;
+ struct uio *uiop;
+ int ioflag;
+ struct ucred *cred;
+{
+ if (vp->v_type != VREG)
+ return (EPERM);
+ return (nfs_bioread(vp, uiop, ioflag, cred));
+}
+
+/*
+ * nfs readlink call
+ */
+nfs_readlink(vp, uiop, cred)
+ struct vnode *vp;
+ struct uio *uiop;
+ struct ucred *cred;
+{
+ if (vp->v_type != VLNK)
+ return (EPERM);
+ return (nfs_bioread(vp, uiop, 0, cred));
+}
+
+/*
+ * Do a readlink rpc.
+ * Called by nfs_doio() from below the buffer cache.
+ */
+nfs_readlinkrpc(vp, uiop, cred)
+ register struct vnode *vp;
+ struct uio *uiop;
+ struct ucred *cred;
+{
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1;
+ caddr_t bpos, dpos, cp2;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+ long len;
+
+ nfsstats.rpccnt[NFSPROC_READLINK]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH);
+ nfsm_fhtom(vp);
+ nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, 0);
+ nfsm_strsiz(len, NFS_MAXPATHLEN);
+ nfsm_mtouio(uiop, len);
+ nfsm_reqdone;
+ return (error);
+}
+
+/*
+ * nfs read rpc call
+ * Ditto above
+ */
+nfs_readrpc(vp, uiop, cred)
+ register struct vnode *vp;
+ struct uio *uiop;
+ struct ucred *cred;
+{
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1;
+ caddr_t bpos, dpos, cp2;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+ struct nfsmount *nmp;
+ long len, retlen, tsiz;
+
+ nmp = VFSTONFS(vp->v_mount);
+ tsiz = uiop->uio_resid;
+ while (tsiz > 0) {
+ nfsstats.rpccnt[NFSPROC_READ]++;
+ len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
+ nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3);
+ nfsm_fhtom(vp);
+ nfsm_build(tl, u_long *, NFSX_UNSIGNED*3);
+ *tl++ = txdr_unsigned(uiop->uio_offset);
+ *tl++ = txdr_unsigned(len);
+ *tl = 0;
+ nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1);
+ nfsm_loadattr(vp, (struct vattr *)0);
+ nfsm_strsiz(retlen, nmp->nm_rsize);
+ nfsm_mtouio(uiop, retlen);
+ m_freem(mrep);
+ if (retlen < len)
+ tsiz = 0;
+ else
+ tsiz -= len;
+ }
+nfsmout:
+ return (error);
+}
+
+/*
+ * nfs write call
+ */
+nfs_writerpc(vp, uiop, cred)
+ register struct vnode *vp;
+ struct uio *uiop;
+ struct ucred *cred;
+{
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1;
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+ struct nfsmount *nmp;
+ long len, tsiz;
+
+ nmp = VFSTONFS(vp->v_mount);
+ tsiz = uiop->uio_resid;
+ while (tsiz > 0) {
+ nfsstats.rpccnt[NFSPROC_WRITE]++;
+ len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
+ nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred,
+ NFSX_FH+NFSX_UNSIGNED*4);
+ nfsm_fhtom(vp);
+ nfsm_build(tl, u_long *, NFSX_UNSIGNED*4);
+ *(tl+1) = txdr_unsigned(uiop->uio_offset);
+ *(tl+3) = txdr_unsigned(len);
+ nfsm_uiotom(uiop, len);
+ nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1);
+ nfsm_loadattr(vp, (struct vattr *)0);
+ m_freem(mrep);
+ tsiz -= len;
+ }
+nfsmout:
+ return (error);
+}
+
+/*
+ * nfs mknod call
+ * This is a kludge. Use a create rpc but with the IFMT bits of the mode
+ * set to specify the file type and the size field for rdev.
+ */
+/* ARGSUSED */
+nfs_mknod(ndp, vap, cred, p)
+ struct nameidata *ndp;
+ struct ucred *cred;
+ register struct vattr *vap;
+ struct proc *p;
+{
+ register struct nfsv2_sattr *sp;
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+ u_long rdev;
+
+ if (vap->va_type == VCHR || vap->va_type == VBLK)
+ rdev = txdr_unsigned(vap->va_rdev);
+#ifdef FIFO
+ else if (vap->va_type == VFIFO)
+ rdev = 0xffffffff;
+#endif /* FIFO */
+ else {
+ VOP_ABORTOP(ndp);
+ vput(ndp->ni_dvp);
+ return (EOPNOTSUPP);
+ }
+ nfsstats.rpccnt[NFSPROC_CREATE]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR);
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
+ nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
+ sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode);
+ sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
+ sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
+ sp->sa_size = rdev;
+ /* or should these be VNOVAL ?? */
+ txdr_time(&vap->va_atime, &sp->sa_atime);
+ txdr_time(&vap->va_mtime, &sp->sa_mtime);
+ nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1);
+ nfsm_reqdone;
+ FREE(ndp->ni_pnbuf, M_NAMEI);
+ VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
+ nfs_nput(ndp->ni_dvp);
+ return (error);
+}
+
+/*
+ * nfs file create call
+ */
+nfs_create(ndp, vap, p)
+ register struct nameidata *ndp;
+ register struct vattr *vap;
+ struct proc *p;
+{
+ register struct nfsv2_sattr *sp;
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ caddr_t bpos, dpos, cp2;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+
+ nfsstats.rpccnt[NFSPROC_CREATE]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR);
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
+ nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
+ sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode);
+ sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
+ sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
+ sp->sa_size = txdr_unsigned(0);
+ /* or should these be VNOVAL ?? */
+ txdr_time(&vap->va_atime, &sp->sa_atime);
+ txdr_time(&vap->va_mtime, &sp->sa_mtime);
+ nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1);
+ nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
+ nfsm_reqdone;
+ FREE(ndp->ni_pnbuf, M_NAMEI);
+ VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
+ nfs_nput(ndp->ni_dvp);
+ return (error);
+}
+
+/*
+ * nfs file remove call
+ * To try and make nfs semantics closer to ufs semantics, a file that has
+ * other processes using the vnode is renamed instead of removed and then
+ * removed later on the last close.
+ * - If v_usecount > 1
+ * If a rename is not already in the works
+ * call nfs_sillyrename() to set it up
+ * else
+ * do the remove rpc
+ */
+nfs_remove(ndp, p)
+ register struct nameidata *ndp;
+ struct proc *p;
+{
+ register struct vnode *vp = ndp->ni_vp;
+ register struct nfsnode *np = VTONFS(ndp->ni_vp);
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+
+ if (vp->v_usecount > 1) {
+ if (!np->n_sillyrename)
+ error = nfs_sillyrename(ndp, p);
+ } else {
+ nfsstats.rpccnt[NFSPROC_REMOVE]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen));
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
+ nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, p, 1);
+ nfsm_reqdone;
+ FREE(ndp->ni_pnbuf, M_NAMEI);
+ VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
+ /*
+ * Kludge City: If the first reply to the remove rpc is lost..
+ * the reply to the retransmitted request will be ENOENT
+ * since the file was in fact removed
+ * Therefore, we cheat and return success.
+ */
+ if (error == ENOENT)
+ error = 0;
+ }
+ np->n_attrstamp = 0;
+ if (ndp->ni_dvp == vp)
+ vrele(vp);
+ else
+ nfs_nput(ndp->ni_dvp);
+ nfs_nput(vp);
+ return (error);
+}
+
+/*
+ * nfs file remove rpc called from nfs_inactive
+ */
+nfs_removeit(sp, p)
+ register struct sillyrename *sp;
+ struct proc *p;
+{
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+
+ nfsstats.rpccnt[NFSPROC_REMOVE]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], sp->s_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(sp->s_namlen));
+ nfsm_fhtom(sp->s_dvp);
+ nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN);
+ nfsm_request(sp->s_dvp, NFSPROC_REMOVE, p, 1);
+ nfsm_reqdone;
+ VTONFS(sp->s_dvp)->n_flag |= NMODIFIED;
+ return (error);
+}
+
+/*
+ * nfs file rename call
+ */
+nfs_rename(sndp, tndp, p)
+ register struct nameidata *sndp, *tndp;
+ struct proc *p;
+{
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+
+ nfsstats.rpccnt[NFSPROC_RENAME]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred,
+ (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) +
+ nfsm_rndup(tndp->ni_namelen)); /* or sndp->ni_cred?*/
+ nfsm_fhtom(sndp->ni_dvp);
+ nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN);
+ nfsm_fhtom(tndp->ni_dvp);
+ nfsm_strtom(tndp->ni_ptr, tndp->ni_namelen, NFS_MAXNAMLEN);
+ nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1);
+ nfsm_reqdone;
+ VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED;
+ VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED;
+ if (sndp->ni_vp->v_type == VDIR) {
+ if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR)
+ cache_purge(tndp->ni_dvp);
+ cache_purge(sndp->ni_dvp);
+ }
+ if (tndp->ni_dvp == tndp->ni_vp)
+ vrele(tndp->ni_dvp);
+ else
+ vput(tndp->ni_dvp);
+ if (tndp->ni_vp)
+ vput(tndp->ni_vp);
+ vrele(sndp->ni_dvp);
+ vrele(sndp->ni_vp);
+ /*
+ * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
+ */
+ if (error == ENOENT)
+ error = 0;
+ return (error);
+}
+
+/*
+ * nfs file rename rpc called from nfs_remove() above
+ */
+nfs_renameit(sndp, sp, p)
+ register struct nameidata *sndp;
+ register struct sillyrename *sp;
+ struct proc *p;
+{
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+
+ nfsstats.rpccnt[NFSPROC_RENAME]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_RENAME], sp->s_cred,
+ (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) +
+ nfsm_rndup(sp->s_namlen)); /* or sndp->ni_cred?*/
+ nfsm_fhtom(sndp->ni_dvp);
+ nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN);
+ nfsm_fhtom(sp->s_dvp);
+ nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN);
+ nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1);
+ nfsm_reqdone;
+ FREE(sndp->ni_pnbuf, M_NAMEI);
+ VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED;
+ VTONFS(sp->s_dvp)->n_flag |= NMODIFIED;
+ return (error);
+}
+
+/*
+ * nfs hard link create call
+ */
+nfs_link(vp, ndp, p)
+ register struct vnode *vp;
+ register struct nameidata *ndp;
+ struct proc *p;
+{
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+
+ if (ndp->ni_dvp != vp)
+ nfs_lock(vp);
+ nfsstats.rpccnt[NFSPROC_LINK]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred,
+ NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen));
+ nfsm_fhtom(vp);
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
+ nfsm_request(vp, NFSPROC_LINK, p, 1);
+ nfsm_reqdone;
+ FREE(ndp->ni_pnbuf, M_NAMEI);
+ VTONFS(vp)->n_attrstamp = 0;
+ VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
+ if (ndp->ni_dvp != vp)
+ nfs_unlock(vp);
+ nfs_nput(ndp->ni_dvp);
+ /*
+ * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
+ */
+ if (error == EEXIST)
+ error = 0;
+ return (error);
+}
+
+/*
+ * nfs symbolic link create call
+ */
+nfs_symlink(ndp, vap, nm, p)
+ struct nameidata *ndp;
+ struct vattr *vap;
+ char *nm; /* is this the path ?? */
+ struct proc *p;
+{
+ register struct nfsv2_sattr *sp;
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+
+ nfsstats.rpccnt[NFSPROC_SYMLINK]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_UNSIGNED);
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
+ nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN);
+ nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
+ sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode);
+ sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
+ sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
+ sp->sa_size = txdr_unsigned(VNOVAL);
+ txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */
+ txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */
+ nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, p, 1);
+ nfsm_reqdone;
+ FREE(ndp->ni_pnbuf, M_NAMEI);
+ VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
+ nfs_nput(ndp->ni_dvp);
+ /*
+ * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
+ */
+ if (error == EEXIST)
+ error = 0;
+ return (error);
+}
+
+/*
+ * nfs make dir call
+ */
+nfs_mkdir(ndp, vap, p)
+ register struct nameidata *ndp;
+ struct vattr *vap;
+ struct proc *p;
+{
+ register struct nfsv2_sattr *sp;
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ register int len;
+ caddr_t bpos, dpos, cp2;
+ u_long xid;
+ int error = 0, firsttry = 1;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+
+ len = ndp->ni_namelen;
+ nfsstats.rpccnt[NFSPROC_MKDIR]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR);
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN);
+ nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
+ sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode);
+ sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
+ sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
+ sp->sa_size = txdr_unsigned(VNOVAL);
+ txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */
+ txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */
+ nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, p, 1);
+ nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
+ nfsm_reqdone;
+ VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
+ /*
+ * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
+ * if we can succeed in looking up the directory.
+ * "firsttry" is necessary since the macros may "goto nfsmout" which
+ * is above the if on errors. (Ugh)
+ */
+ if (error == EEXIST && firsttry) {
+ firsttry = 0;
+ error = 0;
+ nfsstats.rpccnt[NFSPROC_LOOKUP]++;
+ ndp->ni_vp = NULL;
+ nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN);
+ nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, p, 1);
+ nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
+ if (ndp->ni_vp->v_type != VDIR) {
+ vput(ndp->ni_vp);
+ error = EEXIST;
+ }
+ m_freem(mrep);
+ }
+ FREE(ndp->ni_pnbuf, M_NAMEI);
+ nfs_nput(ndp->ni_dvp);
+ return (error);
+}
+
+/*
+ * nfs remove directory call
+ */
+nfs_rmdir(ndp, p)
+ register struct nameidata *ndp;
+ struct proc *p;
+{
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ caddr_t bpos, dpos;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+
+ if (ndp->ni_dvp == ndp->ni_vp) {
+ vrele(ndp->ni_dvp);
+ nfs_nput(ndp->ni_dvp);
+ return (EINVAL);
+ }
+ nfsstats.rpccnt[NFSPROC_RMDIR]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen));
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
+ nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, p, 1);
+ nfsm_reqdone;
+ FREE(ndp->ni_pnbuf, M_NAMEI);
+ VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
+ cache_purge(ndp->ni_dvp);
+ cache_purge(ndp->ni_vp);
+ nfs_nput(ndp->ni_vp);
+ nfs_nput(ndp->ni_dvp);
+ /*
+ * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
+ */
+ if (error == ENOENT)
+ error = 0;
+ return (error);
+}
+
+/*
+ * nfs readdir call
+ * Although cookie is defined as opaque, I translate it to/from net byte
+ * order so that it looks more sensible. This appears consistent with the
+ * Ultrix implementation of NFS.
+ */
+nfs_readdir(vp, uiop, cred, eofflagp)
+ register struct vnode *vp;
+ struct uio *uiop;
+ struct ucred *cred;
+ int *eofflagp;
+{
+ register struct nfsnode *np = VTONFS(vp);
+ int tresid, error;
+ struct vattr vattr;
+
+ if (vp->v_type != VDIR)
+ return (EPERM);
+ /*
+ * First, check for hit on the EOF offset cache
+ */
+ if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset &&
+ (np->n_flag & NMODIFIED) == 0 &&
+ nfs_dogetattr(vp, &vattr, cred, 0, uiop->uio_procp) == 0 &&
+ np->n_mtime == vattr.va_mtime.tv_sec) {
+ *eofflagp = 1;
+ nfsstats.direofcache_hits++;
+ return (0);
+ }
+
+ /*
+ * Call nfs_bioread() to do the real work.
+ */
+ tresid = uiop->uio_resid;
+ error = nfs_bioread(vp, uiop, 0, cred);
+
+ if (!error && uiop->uio_resid == tresid) {
+ *eofflagp = 1;
+ nfsstats.direofcache_misses++;
+ } else
+ *eofflagp = 0;
+ return (error);
+}
+
+/*
+ * Readdir rpc call.
+ * Called from below the buffer cache by nfs_doio().
+ */
+nfs_readdirrpc(vp, uiop, cred)
+ register struct vnode *vp;
+ struct uio *uiop;
+ struct ucred *cred;
+{
+ register long len;
+ register struct direct *dp;
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1;
+ long tlen, lastlen;
+ caddr_t bpos, dpos, cp2;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+ struct mbuf *md2;
+ caddr_t dpos2;
+ int siz;
+ int more_dirs = 1;
+ off_t off, savoff;
+ struct direct *savdp;
+ struct nfsmount *nmp;
+ struct nfsnode *np = VTONFS(vp);
+ long tresid;
+
+ nmp = VFSTONFS(vp->v_mount);
+ tresid = uiop->uio_resid;
+ /*
+ * Loop around doing readdir rpc's of size uio_resid or nm_rsize,
+ * whichever is smaller, truncated to a multiple of NFS_DIRBLKSIZ.
+ * The stopping criteria is EOF or buffer full.
+ */
+ while (more_dirs && uiop->uio_resid >= NFS_DIRBLKSIZ) {
+ nfsstats.rpccnt[NFSPROC_READDIR]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid);
+ nfsm_fhtom(vp);
+ nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED);
+ *tl++ = txdr_unsigned(uiop->uio_offset);
+ *tl = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ?
+ nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1));
+ nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, 0);
+ siz = 0;
+ nfsm_disect(tl, u_long *, NFSX_UNSIGNED);
+ more_dirs = fxdr_unsigned(int, *tl);
+
+ /* Save the position so that we can do nfsm_mtouio() later */
+ dpos2 = dpos;
+ md2 = md;
+
+ /* loop thru the dir entries, doctoring them to 4bsd form */
+ off = uiop->uio_offset;
+#ifdef lint
+ dp = (struct direct *)0;
+#endif /* lint */
+ while (more_dirs && siz < uiop->uio_resid) {
+ savoff = off; /* Hold onto offset and dp */
+ savdp = dp;
+ nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED);
+ dp = (struct direct *)tl;
+ dp->d_ino = fxdr_unsigned(u_long, *tl++);
+ len = fxdr_unsigned(int, *tl);
+ if (len <= 0 || len > NFS_MAXNAMLEN) {
+ error = EBADRPC;
+ m_freem(mrep);
+ goto nfsmout;
+ }
+ dp->d_namlen = (u_short)len;
+ nfsm_adv(len); /* Point past name */
+ tlen = nfsm_rndup(len);
+ /*
+ * This should not be necessary, but some servers have
+ * broken XDR such that these bytes are not null filled.
+ */
+ if (tlen != len) {
+ *dpos = '\0'; /* Null-terminate */
+ nfsm_adv(tlen - len);
+ len = tlen;
+ }
+ nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED);
+ off = fxdr_unsigned(off_t, *tl);
+ *tl++ = 0; /* Ensures null termination of name */
+ more_dirs = fxdr_unsigned(int, *tl);
+ dp->d_reclen = len+4*NFSX_UNSIGNED;
+ siz += dp->d_reclen;
+ }
+ /*
+ * If at end of rpc data, get the eof boolean
+ */
+ if (!more_dirs) {
+ nfsm_disecton(tl, u_long *, NFSX_UNSIGNED);
+ more_dirs = (fxdr_unsigned(int, *tl) == 0);
+
+ /*
+ * If at EOF, cache directory offset
+ */
+ if (!more_dirs)
+ np->n_direofoffset = off;
+ }
+ /*
+ * If there is too much to fit in the data buffer, use savoff and
+ * savdp to trim off the last record.
+ * --> we are not at eof
+ */
+ if (siz > uiop->uio_resid) {
+ off = savoff;
+ siz -= dp->d_reclen;
+ dp = savdp;
+ more_dirs = 0; /* Paranoia */
+ }
+ if (siz > 0) {
+ lastlen = dp->d_reclen;
+ md = md2;
+ dpos = dpos2;
+ nfsm_mtouio(uiop, siz);
+ uiop->uio_offset = off;
+ } else
+ more_dirs = 0; /* Ugh, never happens, but in case.. */
+ m_freem(mrep);
+ }
+ /*
+ * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ
+ * by increasing d_reclen for the last record.
+ */
+ if (uiop->uio_resid < tresid) {
+ len = uiop->uio_resid & (NFS_DIRBLKSIZ - 1);
+ if (len > 0) {
+ dp = (struct direct *)
+ (uiop->uio_iov->iov_base - lastlen);
+ dp->d_reclen += len;
+ uiop->uio_iov->iov_base += len;
+ uiop->uio_iov->iov_len -= len;
+ uiop->uio_resid -= len;
+ }
+ }
+nfsmout:
+ return (error);
+}
+
+static char hextoasc[] = "0123456789abcdef";
+
+/*
+ * Silly rename. To make the NFS filesystem that is stateless look a little
+ * more like the "ufs" a remove of an active vnode is translated to a rename
+ * to a funny looking filename that is removed by nfs_inactive on the
+ * nfsnode. There is the potential for another process on a different client
+ * to create the same funny name between the nfs_lookitup() fails and the
+ * nfs_rename() completes, but...
+ */
+nfs_sillyrename(ndp, p)
+ register struct nameidata *ndp;
+ struct proc *p;
+{
+ register struct nfsnode *np;
+ register struct sillyrename *sp;
+ int error;
+ short pid;
+
+ np = VTONFS(ndp->ni_dvp);
+ cache_purge(ndp->ni_dvp);
+ MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
+ M_NFSREQ, M_WAITOK);
+ bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH);
+ np = VTONFS(ndp->ni_vp);
+ sp->s_cred = crdup(ndp->ni_cred);
+ sp->s_dvp = ndp->ni_dvp;
+ VREF(sp->s_dvp);
+
+ /* Fudge together a funny name */
+ pid = p->p_pid;
+ bcopy(".nfsAxxxx4.4", sp->s_name, 13);
+ sp->s_namlen = 12;
+ sp->s_name[8] = hextoasc[pid & 0xf];
+ sp->s_name[7] = hextoasc[(pid >> 4) & 0xf];
+ sp->s_name[6] = hextoasc[(pid >> 8) & 0xf];
+ sp->s_name[5] = hextoasc[(pid >> 12) & 0xf];
+
+ /* Try lookitups until we get one that isn't there */
+ while (nfs_lookitup(sp, (nfsv2fh_t *)0, p) == 0) {
+ sp->s_name[4]++;
+ if (sp->s_name[4] > 'z') {
+ error = EINVAL;
+ goto bad;
+ }
+ }
+ if (error = nfs_renameit(ndp, sp, p))
+ goto bad;
+ nfs_lookitup(sp, &np->n_fh, p);
+ np->n_sillyrename = sp;
+ return (0);
+bad:
+ vrele(sp->s_dvp);
+ crfree(sp->s_cred);
+ free((caddr_t)sp, M_NFSREQ);
+ return (error);
+}
+
+/*
+ * Look up a file name for silly rename stuff.
+ * Just like nfs_lookup() except that it doesn't load returned values
+ * into the nfsnode table.
+ * If fhp != NULL it copies the returned file handle out
+ */
+nfs_lookitup(sp, fhp, p)
+ register struct sillyrename *sp;
+ nfsv2fh_t *fhp;
+ struct proc *p;
+{
+ register struct vnode *vp = sp->s_dvp;
+ register u_long *tl;
+ register caddr_t cp;
+ register long t1, t2;
+ caddr_t bpos, dpos, cp2;
+ u_long xid;
+ int error = 0;
+ struct mbuf *mreq, *mrep, *md, *mb, *mb2;
+ long len;
+
+ nfsstats.rpccnt[NFSPROC_LOOKUP]++;
+ len = sp->s_namlen;
+ nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], sp->s_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
+ nfsm_fhtom(vp);
+ nfsm_strtom(sp->s_name, len, NFS_MAXNAMLEN);
+ nfsm_request(vp, NFSPROC_LOOKUP, p, 1);
+ if (fhp != NULL) {
+ nfsm_disect(cp, caddr_t, NFSX_FH);
+ bcopy(cp, (caddr_t)fhp, NFSX_FH);
+ }
+ nfsm_reqdone;
+ return (error);
+}
+
+/*
+ * Kludge City..
+ * - make nfs_bmap() essentially a no-op that does no translation
+ * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc
+ * after mapping the physical addresses into Kernel Virtual space in the
+ * nfsiobuf area.
+ * (Maybe I could use the process's page mapping, but I was concerned that
+ * Kernel Write might not be enabled and also figured copyout() would do
+ * a lot more work than bcopy() and also it currently happens in the
+ * context of the swapper process (2).
+ */
+nfs_bmap(vp, bn, vpp, bnp)
+ struct vnode *vp;
+ daddr_t bn;
+ struct vnode **vpp;
+ daddr_t *bnp;
+{
+ if (vpp != NULL)
+ *vpp = vp;
+ if (bnp != NULL)
+ *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize);
+ return (0);
+}
+
+/*
+ * Strategy routine for phys. i/o
+ * If the biod's are running, queue a request
+ * otherwise just call nfs_doio() to get it done
+ */
+nfs_strategy(bp)
+ register struct buf *bp;
+{
+ register struct buf *dp;
+ register int i;
+ int error = 0;
+ int fnd = 0;
+
+ /*
+ * Set b_proc. It seems a bit silly to do it here, but since bread()
+ * doesn't set it, I will.
+ * Set b_proc == NULL for asynchronous ops, since these may still
+ * be hanging about after the process terminates.
+ */
+ if ((bp->b_flags & B_PHYS) == 0) {
+ if (bp->b_flags & B_ASYNC)
+ bp->b_proc = (struct proc *)0;
+ else
+ bp->b_proc = curproc;
+ }
+ /*
+ * If the op is asynchronous and an i/o daemon is waiting
+ * queue the request, wake it up and wait for completion
+ * otherwise just do it ourselves.
+ */
+ if ((bp->b_flags & B_ASYNC) == 0 || nfs_numasync == 0)
+ return (nfs_doio(bp));
+ for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
+ if (nfs_iodwant[i]) {
+ dp = &nfs_bqueue;
+ if (dp->b_actf == NULL) {
+ dp->b_actl = bp;
+ bp->b_actf = dp;
+ } else {
+ dp->b_actf->b_actl = bp;
+ bp->b_actf = dp->b_actf;
+ }
+ dp->b_actf = bp;
+ bp->b_actl = dp;
+ fnd++;
+ wakeup((caddr_t)&nfs_iodwant[i]);
+ break;
+ }
+ }
+ if (!fnd)
+ error = nfs_doio(bp);
+ return (error);
+}
+
+/*
+ * Fun and games with i/o
+ * Essentially play ubasetup() and disk interrupt service routine by
+ * mapping the data buffer into kernel virtual space and doing the
+ * nfs read or write rpc's from it.
+ * If the nfsiod's are not running, this is just called from nfs_strategy(),
+ * otherwise it is called by the nfsiods to do what would normally be
+ * partially disk interrupt driven.
+ */
+nfs_doio(bp)
+ register struct buf *bp;
+{
+ register struct uio *uiop;
+ register struct vnode *vp;
+ struct nfsnode *np;
+ struct ucred *cr;
+ int error;
+ struct uio uio;
+ struct iovec io;
+#if !defined(hp300) && !defined(i386)
+ register struct pte *pte, *ppte;
+ register caddr_t vaddr;
+ int npf, npf2;
+ int reg, o;
+ caddr_t vbase;
+ unsigned v;
+#endif
+
+ vp = bp->b_vp;
+ np = VTONFS(vp);
+ uiop = &uio;
+ uiop->uio_iov = &io;
+ uiop->uio_iovcnt = 1;
+ uiop->uio_segflg = UIO_SYSSPACE;
+ uiop->uio_procp = (struct proc *)0;
+
+ /*
+ * For phys i/o, map the b_addr into kernel virtual space using
+ * the Nfsiomap pte's
+ * Also, add a temporary b_rcred for reading using the process's uid
+ * and a guess at a group
+ */
+ if (bp->b_flags & B_PHYS) {
+ if (bp->b_flags & B_DIRTY)
+ uiop->uio_procp = pageproc;
+ cr = crcopy(uiop->uio_procp->p_ucred);
+ /* mapping was already done by vmapbuf */
+ io.iov_base = bp->b_un.b_addr;
+
+ /*
+ * And do the i/o rpc
+ */
+ io.iov_len = uiop->uio_resid = bp->b_bcount;
+ uiop->uio_offset = bp->b_blkno * DEV_BSIZE;
+ if (bp->b_flags & B_READ) {
+ uiop->uio_rw = UIO_READ;
+ nfsstats.read_physios++;
+ bp->b_error = error = nfs_readrpc(vp, uiop, cr);
+ (void) vnode_pager_uncache(vp);
+ } else {
+ uiop->uio_rw = UIO_WRITE;
+ nfsstats.write_physios++;
+ bp->b_error = error = nfs_writerpc(vp, uiop, cr);
+ }
+
+ /*
+ * Finally, release pte's used by physical i/o
+ */
+ crfree(cr);
+ } else {
+ if (bp->b_flags & B_READ) {
+ io.iov_len = uiop->uio_resid = bp->b_bcount;
+ io.iov_base = bp->b_un.b_addr;
+ uiop->uio_rw = UIO_READ;
+ switch (vp->v_type) {
+ case VREG:
+ uiop->uio_offset = bp->b_blkno * DEV_BSIZE;
+ nfsstats.read_bios++;
+ error = nfs_readrpc(vp, uiop, bp->b_rcred);
+ break;
+ case VLNK:
+ uiop->uio_offset = 0;
+ nfsstats.readlink_bios++;
+ error = nfs_readlinkrpc(vp, uiop, bp->b_rcred);
+ break;
+ case VDIR:
+ uiop->uio_offset = bp->b_lblkno;
+ nfsstats.readdir_bios++;
+ error = nfs_readdirrpc(vp, uiop, bp->b_rcred);
+ /*
+ * Save offset cookie in b_blkno.
+ */
+ bp->b_blkno = uiop->uio_offset;
+ break;
+ };
+ bp->b_error = error;
+ } else {
+ io.iov_len = uiop->uio_resid = bp->b_dirtyend
+ - bp->b_dirtyoff;
+ uiop->uio_offset = (bp->b_blkno * DEV_BSIZE)
+ + bp->b_dirtyoff;
+ io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff;
+ uiop->uio_rw = UIO_WRITE;
+ nfsstats.write_bios++;
+ bp->b_error = error = nfs_writerpc(vp, uiop,
+ bp->b_wcred);
+ if (error) {
+ np->n_error = error;
+ np->n_flag |= NWRITEERR;
+ }
+ bp->b_dirtyoff = bp->b_dirtyend = 0;
+ }
+ }
+ if (error)
+ bp->b_flags |= B_ERROR;
+ bp->b_resid = uiop->uio_resid;
+ biodone(bp);
+ return (error);
+}
+
+/*
+ * Mmap a file
+ *
+ * NB Currently unsupported.
+ */
+/* ARGSUSED */
+nfs_mmap(vp, fflags, cred, p)
+ struct vnode *vp;
+ int fflags;
+ struct ucred *cred;
+ struct proc *p;
+{
+
+ return (EINVAL);
+}
+
+/*
+ * Flush all the blocks associated with a vnode.
+ * Walk through the buffer pool and push any dirty pages
+ * associated with the vnode.
+ */
+/* ARGSUSED */
+nfs_fsync(vp, fflags, cred, waitfor, p)
+ register struct vnode *vp;
+ int fflags;
+ struct ucred *cred;
+ int waitfor;
+ struct proc *p;
+{
+ register struct nfsnode *np = VTONFS(vp);
+ int error = 0;
+
+ if (np->n_flag & NMODIFIED) {
+ np->n_flag &= ~NMODIFIED;
+ vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0);
+ }
+ if (!error && (np->n_flag & NWRITEERR))
+ error = np->n_error;
+ return (error);
+}
+
+/*
+ * NFS advisory byte-level locks.
+ * Currently unsupported.
+ */
+nfs_advlock(vp, id, op, fl, flags)
+ struct vnode *vp;
+ caddr_t id;
+ int op;
+ struct flock *fl;
+ int flags;
+{
+
+ return (EOPNOTSUPP);
+}
+
+/*
+ * Print out the contents of an nfsnode.
+ */
+nfs_print(vp)
+ struct vnode *vp;
+{
+ register struct nfsnode *np = VTONFS(vp);
+
+ printf("tag VT_NFS, fileid %d fsid 0x%x",
+ np->n_vattr.va_fileid, np->n_vattr.va_fsid);
+#ifdef FIFO
+ if (vp->v_type == VFIFO)
+ fifo_printinfo(vp);
+#endif /* FIFO */
+ printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : "");
+ if (np->n_lockholder == 0)
+ return;
+ printf("\towner pid %d", np->n_lockholder);
+ if (np->n_lockwaiter)
+ printf(" waiting pid %d", np->n_lockwaiter);
+ printf("\n");
+}
projects / unix-history / commitdiff