+/*
+ * 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 are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley. The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * @(#)nfs_vnops.c 7.1 (Berkeley) %G%
+ */
+
+/*
+ * vnode op calls for sun nfs version 2
+ */
+
+#include "machine/pte.h"
+#include "machine/mtpr.h"
+#include "strings.h"
+#include "param.h"
+#include "user.h"
+#include "proc.h"
+#include "mount.h"
+#include "buf.h"
+#include "vm.h"
+#include "dir.h"
+#include "malloc.h"
+#include "mbuf.h"
+#include "uio.h"
+#include "ucred.h"
+#include "namei.h"
+#include "errno.h"
+#include "file.h"
+#include "conf.h"
+#include "vnode.h"
+#include "../ufs/inode.h"
+#include "nfsv2.h"
+#include "nfs.h"
+#include "nfsnode.h"
+#include "nfsmount.h"
+#include "xdr_subs.h"
+#include "nfsm_subs.h"
+
+/* Defs */
+#define TRUE 1
+#define FALSE 0
+
+/* Global vars */
+int nfs_lookup(),
+ nfs_create(),
+ nfs_open(),
+ nfs_close(),
+ nfs_access(),
+ nfs_getattr(),
+ nfs_setattr(),
+ nfs_read(),
+ nfs_write(),
+ vfs_noop(),
+ vfs_nullop(),
+ nfs_remove(),
+ nfs_link(),
+ nfs_rename(),
+ nfs_mkdir(),
+ nfs_rmdir(),
+ nfs_symlink(),
+ nfs_readdir(),
+ nfs_readlink(),
+ nfs_abortop(),
+ nfs_lock(),
+ nfs_unlock(),
+ nfs_bmap(),
+ nfs_strategy(),
+ nfs_inactive();
+
+struct vnodeops nfsv2_vnodeops = {
+ nfs_lookup,
+ nfs_create,
+ vfs_noop,
+ nfs_open,
+ nfs_close,
+ nfs_access,
+ nfs_getattr,
+ nfs_setattr,
+ nfs_read,
+ nfs_write,
+ vfs_noop,
+ vfs_noop,
+ vfs_noop,
+ vfs_nullop,
+ vfs_noop,
+ nfs_remove,
+ nfs_link,
+ nfs_rename,
+ nfs_mkdir,
+ nfs_rmdir,
+ nfs_symlink,
+ nfs_readdir,
+ nfs_readlink,
+ nfs_abortop,
+ nfs_inactive,
+ nfs_lock,
+ nfs_unlock,
+ nfs_bmap,
+ nfs_strategy,
+};
+
+/* Special device vnode ops */
+int blk_open(),
+ blk_read(),
+ blk_write(),
+ blk_ioctl(),
+ blk_select(),
+ ufs_bmap(),
+ blk_strategy();
+
+struct vnodeops nfsv2chr_vnodeops = {
+ vfs_noop,
+ vfs_noop,
+ vfs_noop,
+ blk_open,
+ nfs_close,
+ nfs_access,
+ nfs_getattr,
+ nfs_setattr,
+ blk_read,
+ blk_write,
+ blk_ioctl,
+ blk_select,
+ vfs_noop,
+ vfs_nullop,
+ vfs_noop,
+ nfs_remove,
+ nfs_link,
+ nfs_rename,
+ vfs_noop,
+ vfs_noop,
+ nfs_symlink,
+ vfs_noop,
+ vfs_noop,
+ nfs_abortop,
+ nfs_inactive,
+ nfs_lock,
+ nfs_unlock,
+ ufs_bmap,
+ blk_strategy,
+};
+
+extern u_long nfs_procids[NFS_NPROCS];
+extern u_long nfs_prog, nfs_vers;
+extern struct vnode *cache_lookup();
+extern char nfsiobuf[MAXPHYS+NBPG];
+enum vtype v_type[NFLNK+1];
+
+/*
+ * nfs null call from vfs.
+ */
+nfs_null(vp, cred)
+ struct vnode *vp;
+ struct ucred *cred;
+{
+ nfsm_vars;
+
+ nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0);
+ nfsm_request(vp);
+ nfsm_reqdone;
+ return (error);
+}
+
+/*
+ * nfs access vnode op.
+ * Essentially just get vattr and then imitate iaccess()
+ */
+nfs_access(vp, mode, cred)
+ struct vnode *vp;
+ int mode;
+ register struct ucred *cred;
+{
+ 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 (nfs_getattrcache(vp, vap)) {
+ if (error = nfs_getattr(vp, vap, cred))
+ 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
+ */
+nfs_open(vp, mode, cred)
+ struct vnode *vp;
+ int mode;
+ struct ucred *cred;
+{
+ register enum vtype vtyp;
+
+ vtyp = vp->v_type;
+ if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK)
+ return (0);
+ else
+ return (EACCES);
+}
+
+/*
+ * nfs close vnode op
+ * Nothin to do unless its a VCHR
+ */
+nfs_close(vp, fflags, cred)
+ register struct vnode *vp;
+ int fflags;
+ struct ucred *cred;
+{
+ dev_t dev;
+ int error;
+
+ if (vp->v_type != VCHR || vp->v_count > 1)
+ return (0);
+ dev = vp->v_rdev;
+ /* XXX what is this doing below the vnode op call */
+ if (setjmp(&u.u_qsave)) {
+ /*
+ * If device close routine is interrupted,
+ * must return so closef can clean up.
+ */
+ error = EINTR;
+ } else
+ error = (*cdevsw[major(dev)].d_close)(dev, fflags, IFCHR);
+ /*
+ * Most device close routines don't return errors,
+ * and dup2() doesn't work right on error.
+ */
+ error = 0; /* XXX */
+ return (error);
+}
+
+/*
+ * nfs getattr call from vfs.
+ */
+nfs_getattr(vp, vap, cred)
+ struct vnode *vp;
+ register struct vattr *vap;
+ struct ucred *cred;
+{
+ nfsm_vars;
+
+ /* 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);
+ nfsm_loadattr(vp, vap);
+ nfsm_reqdone;
+ return (error);
+}
+
+/*
+ * nfs setattr call.
+ */
+nfs_setattr(vp, vap, cred)
+ struct vnode *vp;
+ register struct vattr *vap;
+ struct ucred *cred;
+{
+ nfsm_vars;
+
+ nfsstats.rpccnt[NFSPROC_SETATTR]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR);
+ nfsm_fhtom(vp);
+ nfsm_build(p, u_long *, NFSX_SATTR);
+ if (vap->va_mode == 0xffff)
+ *p++ = VNOVAL;
+ else
+ *p++ = vtonfs_mode(vp->v_type, vap->va_mode);
+ if (vap->va_uid == 0xffff)
+ *p++ = VNOVAL;
+ else
+ *p++ = txdr_unsigned(vap->va_uid);
+ if (vap->va_gid == 0xffff)
+ *p++ = VNOVAL;
+ else
+ *p++ = txdr_unsigned(vap->va_gid);
+ *p++ = txdr_unsigned(vap->va_size);
+ txdr_time(&(vap->va_atime), p);
+ p += 2;
+ txdr_time(&(vap->va_mtime), p);
+ nfsm_request(vp);
+ 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)
+ register struct vnode *vp;
+ register struct nameidata *ndp;
+{
+ register struct vnode *vdp;
+ nfsm_vars;
+ struct vnode *newvp;
+ long len;
+ nfsv2fh_t *fhp;
+ struct nfsnode *np;
+ int lockparent, wantparent, flag;
+ dev_t rdev;
+
+ ndp->ni_dvp = vp;
+ ndp->ni_vp = NULL;
+ if (vp->v_type != VDIR)
+ return (ENOTDIR);
+ lockparent = ndp->ni_nameiop & LOCKPARENT;
+ flag = ndp->ni_nameiop & OPFLAG;
+ wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT);
+#ifdef notyet
+ if (vdp = cache_lookup(ndp)) {
+ nfsstats.lookupcache_hits++;
+ /*
+ * Get the next vnode in the path.
+ * See comment above `IUNLOCK' code for
+ * an explaination of the locking protocol.
+ */
+ if (vp == vdp) {
+ vdp->v_count++;
+ } else if (ndp->ni_isdotdot) {
+ nfs_unlock(vp);
+ nfs_ngrab(VTONFS(vdp));
+ } else {
+ nfs_ngrab(VTONFS(vdp));
+ nfs_unlock(vp);
+ }
+ ndp->ni_vp = vdp;
+ return (0);
+ }
+ nfsstats.lookupcache_misses++;
+#endif notyet
+ 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);
+nfsmout:
+ if (error) {
+ if ((flag == CREATE || flag == RENAME) &&
+ *ndp->ni_next == 0) {
+ if (!lockparent)
+ nfs_unlock(vp);
+ }
+ return (ENOENT);
+ }
+ 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)) {
+ vp->v_count++;
+ newvp = vp;
+ np = VTONFS(vp);
+ } else {
+ if (error = nfs_nget(vp->v_mount, fhp, &np)) {
+ m_freem(mrep);
+ return (error);
+ }
+ newvp = NFSTOV(np);
+ }
+ if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) {
+ if (newvp != vp)
+ nfs_nput(newvp);
+ else
+ vp->v_count--;
+ m_freem(mrep);
+ return (error);
+ }
+ newvp->v_type = np->n_vattr.va_type;
+ ndp->ni_vp = newvp;
+ if (!lockparent)
+ nfs_unlock(vp);
+ m_freem(mrep);
+ return (0);
+ }
+
+ if (flag == RENAME && wantparent && *ndp->ni_next == 0) {
+ if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
+ m_freem(mrep);
+ return (EISDIR);
+ }
+ if (error = nfs_nget(vp->v_mount, fhp, &np)) {
+ m_freem(mrep);
+ return (error);
+ }
+ newvp = NFSTOV(np);
+ if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) {
+ if (newvp != vp)
+ nfs_nput(newvp);
+ else
+ vp->v_count--;
+ m_freem(mrep);
+ return (error);
+ }
+ ndp->ni_vp = newvp;
+ if (!lockparent)
+ nfs_unlock(vp);
+ return (0);
+ }
+
+ if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
+ vp->v_count++;
+ newvp = vp;
+ np = VTONFS(vp);
+ } else if (ndp->ni_isdotdot) {
+ nfs_unlock(vp);
+ if (error = nfs_nget(vp->v_mount, fhp, &np)) {
+ nfs_lock(vp);
+ m_freem(mrep);
+ return (error);
+ }
+ nfs_lock(vp);
+ newvp = NFSTOV(np);
+ } else {
+ if (error = nfs_nget(vp->v_mount, fhp, &np)) {
+ m_freem(mrep);
+ return (error);
+ }
+ newvp = NFSTOV(np);
+ }
+ if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) {
+ if (newvp != vp)
+ nfs_nput(newvp);
+ else
+ vp->v_count--;
+ m_freem(mrep);
+ return (error);
+ }
+ m_freem(mrep);
+ newvp->v_type = np->n_vattr.va_type;
+
+ /*
+ * Handling special files...
+ * For VCHR, use the nfs_node, but with the nfsv2chr_vnodeops
+ * that are a mix of nfs and blk vnode ops.
+ * For VBLK, get a block dev. inode using bdevvp() and release
+ * the nfs_node. This means that ufs_inactive() had better know
+ * how to release inodes that do not have an underlying ufs.
+ * (i_fs == 0)
+ * Also, returns right away to avoid loading the name cache
+ */
+ if (newvp->v_type == VCHR) {
+ newvp->v_rdev = np->n_vattr.va_rdev;
+ newvp->v_op = &nfsv2chr_vnodeops;
+ } else if (newvp->v_type == VBLK) {
+ rdev = np->n_vattr.va_rdev;
+ nfs_nput(newvp);
+ if (error = bdevvp(rdev, &newvp))
+ return (error);
+ }
+ if (vp != newvp && (!lockparent || *ndp->ni_next != '\0'))
+ nfs_unlock(vp);
+ ndp->ni_vp = newvp;
+#ifdef notyet
+ if (error == 0 && ndp->ni_makeentry)
+ cache_enter(ndp);
+#endif notyet
+ return (error);
+}
+
+/*
+ * nfs readlink call
+ */
+nfs_readlink(vp, uiop, cred)
+ struct vnode *vp;
+ struct uio *uiop;
+ struct ucred *cred;
+{
+ nfsm_vars;
+ long len;
+
+ nfsstats.rpccnt[NFSPROC_READLINK]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH);
+ nfsm_fhtom(vp);
+ nfsm_request(vp);
+ nfsm_strsiz(len, NFS_MAXPATHLEN);
+ nfsm_mtouio(uiop, len);
+ nfsm_reqdone;
+ return (error);
+}
+
+/*
+ * nfs read call
+ */
+nfs_read(vp, uiop, offp, ioflag, cred)
+ struct vnode *vp;
+ struct uio *uiop;
+ off_t *offp;
+ int ioflag;
+ struct ucred *cred;
+{
+ nfsm_vars;
+ struct nfsmount *nmp;
+ long len, retlen, tsiz;
+
+ nmp = vfs_to_nfs(vp->v_mount);
+ tsiz = uiop->uio_resid;
+ if (!(ioflag & IO_NODELOCKED))
+ nfs_lock(vp);
+ 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(p, u_long *, NFSX_UNSIGNED*3);
+ *p++ = txdr_unsigned(*offp);
+ *p++ = txdr_unsigned(len);
+ *p = 0;
+ nfsm_request(vp);
+ nfsm_loadattr(vp, (struct vattr *)0);
+ nfsm_strsiz(retlen, nmp->nm_rsize);
+ nfsm_mtouio(uiop, retlen);
+ m_freem(mrep);
+ *offp += retlen;
+ if (retlen < len)
+ tsiz = 0;
+ else
+ tsiz -= len;
+ }
+nfsmout:
+ if (!(ioflag & IO_NODELOCKED))
+ nfs_unlock(vp);
+ return (error);
+}
+
+/*
+ * nfs write call
+ */
+nfs_write(vp, uiop, offp, ioflag, cred)
+ struct vnode *vp;
+ struct uio *uiop;
+ off_t *offp;
+ int ioflag;
+ struct ucred *cred;
+{
+ nfsm_vars;
+ struct nfsmount *nmp;
+ long len, tsiz;
+ u_long osize;
+ off_t ooff;
+ struct vattr va;
+
+ nmp = vfs_to_nfs(vp->v_mount);
+ tsiz = uiop->uio_resid;
+ if (!(ioflag & IO_NODELOCKED))
+ nfs_lock(vp);
+ if ((ioflag&IO_UNIT) || (vp->v_type == VREG && (ioflag&IO_APPEND))) {
+ if (error = nfs_getattr(vp, &va, cred))
+ goto nfsmout;
+ osize = va.va_size;
+ if (vp->v_type == VREG && (ioflag & IO_APPEND))
+ *offp = osize;
+ ooff = *offp;
+ }
+ 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(p, u_long *, NFSX_UNSIGNED*4);
+ *(p+1) = txdr_unsigned(*offp);
+ *(p+3) = txdr_unsigned(len);
+ nfsm_uiotom(uiop, len);
+ nfsm_request(vp);
+ nfsm_loadattr(vp, (struct vattr *)0);
+ m_freem(mrep);
+ tsiz -= len;
+ *offp += len;
+ }
+nfsmout:
+ if (error && (ioflag & IO_UNIT)) {
+ vattr_null(&va);
+ va.va_size = osize;
+ nfs_setattr(vp, &va, cred);
+ *offp = ooff;
+ }
+ if (!(ioflag & IO_NODELOCKED))
+ nfs_unlock(vp);
+ return (error);
+}
+
+/*
+ * nfs file create call
+ */
+nfs_create(ndp, vap)
+ register struct nameidata *ndp;
+ register struct vattr *vap;
+{
+ nfsm_vars;
+
+ nfsstats.rpccnt[NFSPROC_CREATE]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR);
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
+ nfsm_build(p, u_long *, NFSX_UNSIGNED*8);
+ *p++ = vtonfs_mode(VREG, vap->va_mode);
+ *p++ = txdr_unsigned(ndp->ni_cred->cr_uid);
+ *p++ = txdr_unsigned(ndp->ni_cred->cr_gid);
+ *p++ = txdr_unsigned(0);
+ /* or should these be VNOVAL ?? */
+ txdr_time(&(vap->va_atime), p);
+ txdr_time(&(vap->va_mtime), p+2);
+ nfsm_request(ndp->ni_dvp);
+ nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
+ nfsm_reqdone;
+ nfs_nput(ndp->ni_dvp);
+ return (error);
+}
+
+/*
+ * nfs file remove call
+ */
+nfs_remove(ndp)
+ register struct nameidata *ndp;
+{
+ nfsm_vars;
+
+ if (ndp->ni_vp->v_count > 1)
+ error = nfs_sillyrename(ndp, REMOVE);
+ else {
+ nfsstats.rpccnt[NFSPROC_REMOVE]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen));
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
+ nfsm_request(ndp->ni_dvp);
+ nfsm_reqdone;
+ }
+ if (ndp->ni_dvp == ndp->ni_vp)
+ vrele(ndp->ni_dvp);
+ else
+ nfs_nput(ndp->ni_dvp);
+ nfs_nput(ndp->ni_vp);
+ return (error);
+}
+
+/*
+ * nfs file remove rpc called from nfs_inactive
+ */
+nfs_removeit(ndp)
+ register struct nameidata *ndp;
+{
+ nfsm_vars;
+
+ nfsstats.rpccnt[NFSPROC_REMOVE]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen));
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
+ nfsm_request(ndp->ni_dvp);
+ nfsm_reqdone;
+ return (error);
+}
+
+/*
+ * nfs file rename call
+ */
+nfs_rename(sndp, tndp)
+ register struct nameidata *sndp, *tndp;
+{
+ nfsm_vars;
+
+ nfsstats.rpccnt[NFSPROC_RENAME]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred,
+ (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+
+ nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/
+ nfsm_fhtom(sndp->ni_dvp);
+ nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN);
+ nfsm_fhtom(tndp->ni_dvp);
+ nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN);
+ nfsm_request(sndp->ni_dvp);
+ nfsm_reqdone;
+#ifdef notyet
+ 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);
+ }
+#endif
+ nfs_abortop(sndp);
+ nfs_abortop(tndp);
+ return (error);
+}
+
+/*
+ * nfs file rename rpc called from above
+ */
+nfs_renameit(sndp, tndp)
+ register struct nameidata *sndp, *tndp;
+{
+ nfsm_vars;
+
+ nfsstats.rpccnt[NFSPROC_RENAME]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred,
+ (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+
+ nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/
+ nfsm_fhtom(sndp->ni_dvp);
+ nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN);
+ nfsm_fhtom(tndp->ni_dvp);
+ nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN);
+ nfsm_request(sndp->ni_dvp);
+ nfsm_reqdone;
+ return (error);
+}
+
+/*
+ * nfs hard link create call
+ */
+nfs_link(vp, ndp)
+ struct vnode *vp;
+ register struct nameidata *ndp;
+{
+ nfsm_vars;
+
+ nfsstats.rpccnt[NFSPROC_LINK]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred,
+ NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen));
+ nfsm_fhtom(vp);
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
+ nfsm_request(vp);
+ nfsm_reqdone;
+ nfs_nput(ndp->ni_dvp);
+ return (error);
+}
+
+/*
+ * nfs symbolic link create call
+ */
+nfs_symlink(ndp, vap, nm)
+ struct nameidata *ndp;
+ struct vattr *vap;
+ char *nm; /* is this the path ?? */
+{
+ nfsm_vars;
+
+ nfsstats.rpccnt[NFSPROC_SYMLINK]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED);
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
+ nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN);
+ nfsm_build(p, u_long *, NFSX_SATTR);
+ *p++ = vtonfs_mode(VLNK, vap->va_mode);
+ *p++ = txdr_unsigned(ndp->ni_cred->cr_uid);
+ *p++ = txdr_unsigned(ndp->ni_cred->cr_gid);
+ *p++ = txdr_unsigned(VNOVAL);
+ txdr_time(&(vap->va_atime), p); /* or VNOVAL ?? */
+ txdr_time(&(vap->va_mtime), p+2); /* or VNOVAL ?? */
+ nfsm_request(ndp->ni_dvp);
+ nfsm_reqdone;
+ nfs_nput(ndp->ni_dvp);
+ return (error);
+}
+
+/*
+ * nfs make dir call
+ */
+nfs_mkdir(ndp, vap)
+ struct nameidata *ndp;
+ struct vattr *vap;
+{
+ nfsm_vars;
+
+ nfsstats.rpccnt[NFSPROC_MKDIR]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR);
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
+ nfsm_build(p, u_long *, NFSX_SATTR);
+ *p++ = vtonfs_mode(VDIR, vap->va_mode);
+ *p++ = txdr_unsigned(ndp->ni_cred->cr_uid);
+ *p++ = txdr_unsigned(ndp->ni_cred->cr_gid);
+ *p++ = txdr_unsigned(VNOVAL);
+ txdr_time(&(vap->va_atime), p); /* or VNOVAL ?? */
+ txdr_time(&(vap->va_mtime), p+2); /* or VNOVAL ?? */
+ nfsm_request(ndp->ni_dvp);
+ nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
+ nfsm_reqdone;
+ if (error)
+ nfs_nput(ndp->ni_vp);
+ nfs_nput(ndp->ni_dvp);
+ return (error);
+}
+
+/*
+ * nfs remove directory call
+ */
+nfs_rmdir(ndp)
+ register struct nameidata *ndp;
+{
+ nfsm_vars;
+
+ if (ndp->ni_dvp == ndp->ni_vp) {
+ vrele(ndp->ni_dvp);
+ nfs_nput(ndp->ni_dvp);
+ return (EINVAL);
+ }
+ if (ndp->ni_vp->v_count > 1)
+ error = nfs_sillyrename(ndp, RMDIR);
+ else {
+ nfsstats.rpccnt[NFSPROC_RMDIR]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen));
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
+ nfsm_request(ndp->ni_dvp);
+ nfsm_reqdone;
+ }
+#ifdef notyet
+ cache_purge(ndp->ni_dvp);
+ cache_purge(ndp->ni_vp);
+#endif
+ nfs_nput(ndp->ni_vp);
+ nfs_nput(ndp->ni_dvp);
+ return (error);
+}
+
+/*
+ * nfs remove dir rpc called from above
+ */
+nfs_rmdirit(ndp)
+ register struct nameidata *ndp;
+{
+ nfsm_vars;
+
+ nfsstats.rpccnt[NFSPROC_RMDIR]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred,
+ NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen));
+ nfsm_fhtom(ndp->ni_dvp);
+ nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
+ nfsm_request(ndp->ni_dvp);
+ nfsm_reqdone;
+ 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, offp, cred)
+ struct vnode *vp;
+ struct uio *uiop;
+ off_t *offp;
+ struct ucred *cred;
+{
+ register long len;
+ register struct direct *dp;
+ nfsm_vars;
+ struct mbuf *md2;
+ caddr_t dpos2;
+ int siz;
+ int more_dirs, eofflg;
+ off_t off, savoff;
+ struct direct *savdp;
+
+ nfs_lock(vp);
+ nfsstats.rpccnt[NFSPROC_READDIR]++;
+ nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid);
+ nfsm_fhtom(vp);
+ nfsm_build(p, u_long *, 2*NFSX_UNSIGNED);
+ off = *offp;
+ *p++ = txdr_unsigned(off);
+ *p = txdr_unsigned(uiop->uio_resid);
+ nfsm_request(vp);
+ siz = 0;
+ nfsm_disect(p, u_long *, NFSX_UNSIGNED);
+ more_dirs = fxdr_unsigned(int, *p);
+
+ /* 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 */
+ while (more_dirs && siz < uiop->uio_resid) {
+ savoff = off; /* Hold onto offset and dp */
+ savdp = dp;
+ nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED);
+ dp = (struct direct *)p;
+ dp->d_ino = fxdr_unsigned(u_long, *p++);
+ len = fxdr_unsigned(int, *p);
+ if (len <= 0 || len > NFS_MAXNAMLEN) {
+ error = EBADRPC;
+ m_freem(mrep);
+ goto nfsmout;
+ }
+ dp->d_namlen = (u_short)len;
+ len = nfsm_rndup(len);
+ nfsm_adv(len);
+ nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED);
+ off = fxdr_unsigned(off_t, *p);
+ *p++ = 0; /* Ensures null termination of name */
+ more_dirs = fxdr_unsigned(int, *p);
+ 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(p, u_long *, NFSX_UNSIGNED);
+ eofflg = fxdr_unsigned(long, *p);
+ }
+ /*
+ * 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) {
+ eofflg = FALSE;
+ off = savoff;
+ siz -= dp->d_reclen;
+ dp = savdp;
+ }
+ if (siz > 0) {
+#ifdef notdef
+ if (!eofflg)
+ dp->d_reclen += (uiop->uio_resid-siz);
+#endif
+ md = md2;
+ dpos = dpos2;
+ nfsm_mtouio(uiop, siz);
+#ifdef notdef
+ if (!eofflg)
+ uiop->uio_resid = 0;
+#endif
+ *offp = off;
+ }
+ nfsm_reqdone;
+ nfs_unlock(vp);
+ return (error);
+}
+
+/*
+ * nfs statfs call
+ * (Actually a vfsop, not a vnode op)
+ */
+nfs_statfs(mp, sbp)
+ struct mount *mp;
+ register struct statfs *sbp;
+{
+ register struct nfsmount *nmp;
+ nfsm_vars;
+ struct ucred *cred;
+ struct nfsnode *np;
+ struct vnode *vp;
+
+ nmp = vfs_to_nfs(mp);
+ if (error = nfs_nget(mp, &nmp->nm_fh, &np))
+ return (error);
+ vp = NFSTOV(np);
+ nfsstats.rpccnt[NFSPROC_STATFS]++;
+ cred = crget();
+ cred->cr_ngroups = 1;
+ nfsm_reqhead(nfs_procids[NFSPROC_STATFS], cred, NFSX_FH);
+ nfsm_fhtom(vp);
+ nfsm_request(vp);
+ nfsm_disect(p, u_long *, 5*NFSX_UNSIGNED);
+ sbp->f_type = MOUNT_NFS;
+ sbp->f_flags = nmp->nm_flag;
+ sbp->f_bsize = fxdr_unsigned(long, *p++);
+ sbp->f_fsize = fxdr_unsigned(long, *p++);
+ sbp->f_blocks = fxdr_unsigned(long, *p++);
+ sbp->f_bfree = fxdr_unsigned(long, *p++);
+ sbp->f_bavail = fxdr_unsigned(long, *p);
+ sbp->f_files = 0x7fffffff;
+ sbp->f_ffree = 0x7fffffff;
+ sbp->f_fsid.val[0] = mp->m_fsid.val[0];
+ sbp->f_fsid.val[1] = mp->m_fsid.val[1];
+ bcopy(nmp->nm_path, sbp->f_mntonname, MNAMELEN);
+ bcopy(nmp->nm_host, sbp->f_mntfromname, MNAMELEN);
+ nfsm_reqdone;
+ nfs_nput(vp);
+ crfree(cred);
+ return (error);
+}
+
+#define HEXTOASC(x) "0123456789abcdef"[x]
+
+/*
+ * 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, flag)
+ struct nameidata *ndp;
+ int flag;
+{
+ register struct nfsnode *np;
+ register struct sillyrename *sp;
+ register struct nameidata *tndp;
+ int error;
+ short pid;
+
+ np = VTONFS(ndp->ni_dvp);
+ MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
+ M_WAITOK, M_TEMP);
+ sp->s_flag = flag;
+ bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH);
+ np = VTONFS(ndp->ni_vp);
+ tndp = &sp->s_namei;
+ tndp->ni_cred = crdup(ndp->ni_cred);
+
+ /* Fudge together a funny name */
+ pid = u.u_procp->p_pid;
+ bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13);
+ tndp->ni_dent.d_namlen = 12;
+ tndp->ni_dent.d_name[8] = HEXTOASC(pid & 0xf);
+ tndp->ni_dent.d_name[7] = HEXTOASC((pid >> 4) & 0xf);
+ tndp->ni_dent.d_name[6] = HEXTOASC((pid >> 8) & 0xf);
+ tndp->ni_dent.d_name[5] = HEXTOASC((pid >> 12) & 0xf);
+
+ /* Try lookitups until we get one that isn't there */
+ while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) {
+ tndp->ni_dent.d_name[4]++;
+ if (tndp->ni_dent.d_name[4] > 'z') {
+ error = EINVAL;
+ goto bad;
+ }
+ }
+ if (error = nfs_renameit(ndp, tndp))
+ goto bad;
+ nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh);
+ np->n_sillyrename = sp;
+ return (0);
+bad:
+ crfree(ndp->ni_cred);
+ free((caddr_t)sp, M_TEMP);
+ 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(vp, ndp, fhp)
+ register struct vnode *vp;
+ register struct nameidata *ndp;
+ nfsv2fh_t *fhp;
+{
+ nfsm_vars;
+ long len;
+
+ nfsstats.rpccnt[NFSPROC_LOOKUP]++;
+ ndp->ni_dvp = vp;
+ ndp->ni_vp = NULL;
+ len = ndp->ni_dent.d_namlen;
+ nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
+ nfsm_fhtom(vp);
+ nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN);
+ nfsm_request(vp);
+ 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_readit/nfs_writeit
+ * 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->m_bsize);
+ return (0);
+}
+
+/*
+ * Fun and games with phys i/o
+ */
+nfs_strategy(bp)
+ register struct buf *bp;
+{
+ register struct pte *pte, *ppte;
+ register caddr_t vaddr;
+ register struct uio *uiop;
+ register struct ucred *cr;
+ register struct vnode *vp;
+ int npf;
+ unsigned v;
+ struct proc *rp;
+ int o, error;
+ off_t off;
+ struct uio uio;
+ struct iovec io;
+
+ vp = bp->b_vp;
+ cr = crget();
+ cr->cr_gid = 10; /* Pick anything ?? */
+ cr->cr_ngroups = 1;
+ uiop = &uio;
+ uiop->uio_iov = &io;
+ uiop->uio_iovcnt = 1;
+ io.iov_len = uiop->uio_resid = bp->b_bcount;
+ uiop->uio_segflg = UIO_SYSSPACE;
+ uiop->uio_offset = off = bp->b_blkno*DEV_BSIZE;
+ o = (int)bp->b_un.b_addr & PGOFSET;
+ npf = btoc(bp->b_bcount + o);
+ rp = bp->b_flags&B_DIRTY ? &proc[2] : bp->b_proc;
+ cr->cr_uid = rp->p_uid;
+ if ((bp->b_flags & B_PHYS) == 0)
+ panic("nfs strategy Not PHYS IO");
+ if (bp->b_flags & B_PAGET)
+ pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)];
+ else {
+ v = btop(bp->b_un.b_addr);
+ if (bp->b_flags & B_UAREA)
+ pte = &rp->p_addr[v];
+ else
+ pte = vtopte(rp, v);
+ }
+ /*
+ * Play vmaccess() but with the Nfsiomap page table
+ */
+ ppte = &Nfsiomap[0];
+ vaddr = nfsiobuf;
+ while (npf != 0) {
+ mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW));
+#if defined(tahoe)
+ mtpr(P1DC, vaddr);
+#endif
+ ppte++;
+ pte++;
+ vaddr += NBPG;
+ --npf;
+ }
+ io.iov_base = nfsiobuf+o;
+ if (bp->b_flags & B_READ) {
+ uiop->uio_rw = UIO_READ;
+ bp->b_error = error = nfs_read(vp, uiop, &off, 0, cr);
+ } else {
+ uiop->uio_rw = UIO_WRITE;
+ bp->b_error = error = nfs_write(vp, uiop, &off, 0, cr);
+ }
+ bp->b_resid = uiop->uio_resid;
+ biodone(bp);
+ crfree(cr);
+ return (error);
+}
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