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added 386 ifdefs
[unix-history] / usr / src / sys / nfs / nfs_vnops.c
/*
* 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.
*
* %sccs.include.redist.c%
*
* @(#)nfs_vnops.c 7.45 (Berkeley) %G%
*/
/*
* vnode op calls for sun nfs version 2
*/
#include "machine/pte.h"
#include "machine/mtpr.h"
#include "param.h"
#include "user.h"
#include "proc.h"
#include "kernel.h"
#include "mount.h"
#include "buf.h"
#include "vm.h"
#include "malloc.h"
#include "mbuf.h"
#include "errno.h"
#include "file.h"
#include "conf.h"
#include "vnode.h"
#include "text.h"
#include "map.h"
#include "../ufs/quota.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"
#include "nfsiom.h"
/* Defs */
#define TRUE 1
#define FALSE 0
/* Global vars */
int nfs_lookup(),
nfs_create(),
nfs_mknod(),
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_fsync(),
nfs_inactive(),
nfs_reclaim(),
nfs_print(),
nfs_islocked();
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 */
vfs_noop, /* ioctl */
vfs_noop, /* select */
vfs_noop, /* mmap */
nfs_fsync, /* fsync */
vfs_nullop, /* 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 */
};
/* Special device vnode ops */
int spec_lookup(),
spec_open(),
spec_read(),
spec_write(),
spec_strategy(),
spec_bmap(),
spec_ioctl(),
spec_select(),
spec_close(),
spec_badop(),
spec_nullop();
struct vnodeops spec_nfsv2nodeops = {
spec_lookup, /* lookup */
spec_badop, /* create */
spec_badop, /* 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_badop, /* mmap */
spec_nullop, /* fsync */
spec_badop, /* seek */
spec_badop, /* remove */
spec_badop, /* link */
spec_badop, /* rename */
spec_badop, /* mkdir */
spec_badop, /* rmdir */
spec_badop, /* symlink */
spec_badop, /* readdir */
spec_badop, /* readlink */
spec_badop, /* 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 */
};
#ifdef FIFO
int fifo_lookup(),
fifo_open(),
fifo_read(),
fifo_write(),
fifo_bmap(),
fifo_ioctl(),
fifo_select(),
fifo_close(),
fifo_print(),
fifo_badop(),
fifo_nullop();
struct vnodeops fifo_nfsv2nodeops = {
fifo_lookup, /* lookup */
fifo_badop, /* create */
fifo_badop, /* 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_badop, /* mmap */
fifo_nullop, /* fsync */
fifo_badop, /* seek */
fifo_badop, /* remove */
fifo_badop, /* link */
fifo_badop, /* rename */
fifo_badop, /* mkdir */
fifo_badop, /* rmdir */
fifo_badop, /* symlink */
fifo_badop, /* readdir */
fifo_badop, /* readlink */
fifo_badop, /* 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 */
};
#endif /* FIFO */
extern u_long nfs_procids[NFS_NPROCS];
extern u_long nfs_prog, nfs_vers;
extern char nfsiobuf[MAXPHYS+NBPG];
struct map nfsmap[NFS_MSIZ];
struct buf nfs_bqueue; /* Queue head for nfsiod's */
int nfs_asyncdaemons = 0;
struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
static int nfsmap_want = 0;
/*
* nfs null call from vfs.
*/
nfs_null(vp, cred)
struct vnode *vp;
struct ucred *cred;
{
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, u.u_procp, 0);
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 (error = nfs_dogetattr(vp, vap, cred, 0))
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)
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
* For reg files, invalidate any buffer cache entries.
*/
/* ARGSUSED */
nfs_close(vp, fflags, cred)
register struct vnode *vp;
int fflags;
struct ucred *cred;
{
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)
register struct vnode *vp;
struct vattr *vap;
struct ucred *cred;
{
return (nfs_dogetattr(vp, vap, cred, 0));
}
nfs_dogetattr(vp, vap, cred, tryhard)
register struct vnode *vp;
struct vattr *vap;
struct ucred *cred;
int tryhard;
{
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, u.u_procp, tryhard);
nfsm_loadattr(vp, vap);
nfsm_reqdone;
return (error);
}
/*
* nfs setattr call.
*/
nfs_setattr(vp, vap, cred)
register struct vnode *vp;
register struct vattr *vap;
struct ucred *cred;
{
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);
if (vap->va_size != VNOVAL) {
np = VTONFS(vp);
if (np->n_flag & NMODIFIED) {
np->n_flag &= ~NMODIFIED;
vinvalbuf(vp, TRUE);
np->n_attrstamp = 0;
}
}
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);
nfsm_request(vp, NFSPROC_SETATTR, u.u_procp, 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)
register struct vnode *vp;
register struct nameidata *ndp;
{
register struct vnode *vdp;
register u_long *p;
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 & OPFLAG;
wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT);
if ((error = cache_lookup(ndp)) && error != ENOENT) {
struct vattr vattr;
int vpid;
if (vp == ndp->ni_rdir && ndp->ni_isdotdot)
panic("nfs_lookup: .. through root");
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);
} else {
error = vget(vdp);
nfs_unlock(vp);
}
if (!error) {
if (vpid == vdp->v_id) {
if (!nfs_dogetattr(vdp, &vattr, ndp->ni_cred, 0) &&
vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) {
nfsstats.lookupcache_hits++;
return (0);
} else {
cache_purge(vdp);
nfs_nput(vdp);
}
} else {
nfs_nput(vdp);
}
}
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, u.u_procp, 0);
nfsmout:
if (error) {
if (lockparent || (flag != CREATE && flag != RENAME) ||
*ndp->ni_next != 0)
nfs_lock(vp);
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);
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);
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 (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, procp)
register struct vnode *vp;
struct uio *uiop;
struct ucred *cred;
struct proc *procp;
{
register u_long *p;
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]++;
nfs_unlock(vp);
nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH);
nfsm_fhtom(vp);
nfsm_request(vp, NFSPROC_READLINK, procp, 0);
nfsm_strsiz(len, NFS_MAXPATHLEN);
nfsm_mtouio(uiop, len);
nfsm_reqdone;
nfs_lock(vp);
return (error);
}
/*
* nfs read rpc call
* Ditto above
*/
nfs_readrpc(vp, uiop, cred, procp)
register struct vnode *vp;
struct uio *uiop;
struct ucred *cred;
struct proc *procp;
{
register u_long *p;
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(p, u_long *, NFSX_UNSIGNED*3);
*p++ = txdr_unsigned(uiop->uio_offset);
*p++ = txdr_unsigned(len);
*p = 0;
nfsm_request(vp, NFSPROC_READ, 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, procp)
register struct vnode *vp;
struct uio *uiop;
struct ucred *cred;
struct proc *procp;
{
register u_long *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;
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(p, u_long *, NFSX_UNSIGNED*4);
*(p+1) = txdr_unsigned(uiop->uio_offset);
*(p+3) = txdr_unsigned(len);
nfsm_uiotom(uiop, len);
nfsm_request(vp, NFSPROC_WRITE, 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)
struct nameidata *ndp;
struct ucred *cred;
register struct vattr *vap;
{
register struct nfsv2_sattr *sp;
register u_long *p;
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_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(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, u.u_procp, 1);
nfsm_reqdone;
VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
nfs_nput(ndp->ni_dvp);
return (error);
}
/*
* nfs file create call
*/
nfs_create(ndp, vap)
register struct nameidata *ndp;
register struct vattr *vap;
{
register struct nfsv2_sattr *sp;
register u_long *p;
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_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(sp, struct nfsv2_sattr *, NFSX_SATTR);
sp->sa_mode = vtonfs_mode(VREG, 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, u.u_procp, 1);
nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
nfsm_reqdone;
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)
register struct nameidata *ndp;
{
register struct vnode *vp = ndp->ni_vp;
register struct nfsnode *np = VTONFS(ndp->ni_vp);
register u_long *p;
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, 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, NFSPROC_REMOVE, u.u_procp, 1);
nfsm_reqdone;
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(ndp)
register struct nameidata *ndp;
{
register u_long *p;
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], 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, NFSPROC_REMOVE, u.u_procp, 1);
nfsm_reqdone;
VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
return (error);
}
/*
* nfs file rename call
*/
nfs_rename(sndp, tndp)
register struct nameidata *sndp, *tndp;
{
register u_long *p;
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_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, NFSPROC_RENAME, u.u_procp, 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);
}
VOP_ABORTOP(tndp);
if (tndp->ni_dvp == tndp->ni_vp)
vrele(tndp->ni_dvp);
else
vput(tndp->ni_dvp);
if (tndp->ni_vp)
vput(tndp->ni_vp);
VOP_ABORTOP(sndp);
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, tndp)
register struct nameidata *sndp, *tndp;
{
register u_long *p;
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_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, NFSPROC_RENAME, u.u_procp, 1);
nfsm_reqdone;
VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED;
VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED;
return (error);
}
/*
* nfs hard link create call
*/
nfs_link(vp, ndp)
register struct vnode *vp;
register struct nameidata *ndp;
{
register u_long *p;
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_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, NFSPROC_LINK, u.u_procp, 1);
nfsm_reqdone;
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)
struct nameidata *ndp;
struct vattr *vap;
char *nm; /* is this the path ?? */
{
register struct nfsv2_sattr *sp;
register u_long *p;
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_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(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, u.u_procp, 1);
nfsm_reqdone;
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)
register struct nameidata *ndp;
struct vattr *vap;
{
register struct nfsv2_sattr *sp;
register u_long *p;
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_dent.d_namlen;
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_dent.d_name, 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, u.u_procp, 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_dent.d_name, len, NFS_MAXNAMLEN);
nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, u.u_procp, 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);
}
nfs_nput(ndp->ni_dvp);
return (error);
}
/*
* nfs remove directory call
*/
nfs_rmdir(ndp)
register struct nameidata *ndp;
{
register u_long *p;
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_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, NFSPROC_RMDIR, u.u_procp, 1);
nfsm_reqdone;
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) == 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, procp)
register struct vnode *vp;
struct uio *uiop;
struct ucred *cred;
struct proc *procp;
{
register long len;
register struct direct *dp;
register u_long *p;
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 DIRBLKSIZ.
* The stopping criteria is EOF or buffer full.
*/
while (more_dirs && uiop->uio_resid >= DIRBLKSIZ) {
nfsstats.rpccnt[NFSPROC_READDIR]++;
nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid);
nfsm_fhtom(vp);
nfsm_build(p, u_long *, 2*NFSX_UNSIGNED);
*p++ = txdr_unsigned(uiop->uio_offset);
*p = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ?
nmp->nm_rsize : uiop->uio_resid) & ~(DIRBLKSIZ-1));
nfsm_request(vp, NFSPROC_READDIR, procp, 0);
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 */
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(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;
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(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);
more_dirs = (fxdr_unsigned(int, *p) == 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 DIRBLKSIZ
* by increasing d_reclen for the last record.
*/
if (uiop->uio_resid < tresid) {
len = uiop->uio_resid & (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, flag)
register 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);
cache_purge(ndp->ni_dvp);
MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
M_TEMP, M_WAITOK);
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(tndp->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;
{
register u_long *p;
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]++;
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, NFSPROC_LOOKUP, u.u_procp, 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;
struct proc *rp;
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 reads, since these may still
* be hanging about after the process terminates.
*/
if ((bp->b_flags & (B_READ | B_ASYNC)) == (B_READ | B_ASYNC))
bp->b_proc = (struct proc *)0;
else
bp->b_proc = u.u_procp;
/*
* If an i/o daemon is waiting
* queue the request, wake it up and wait for completion
* otherwise just do it ourselves
*/
for (i = 0; i < nfs_asyncdaemons; i++) {
if (rp = nfs_iodwant[i]) {
/*
* Ensure that the async_daemon is still waiting here
*/
if (rp->p_stat != SSLEEP ||
rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) {
nfs_iodwant[i] = (struct proc *)0;
continue;
}
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++;
nfs_iodwant[i] = (struct proc *)0;
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;
struct proc *rp;
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;
/*
* 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) {
bp->b_rcred = cr = crget();
rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc;
cr->cr_uid = rp->p_uid;
cr->cr_gid = 0; /* Anything ?? */
cr->cr_ngroups = 1;
#if defined(hp300) || defined(i386)
/* mapping was already done by vmapbuf */
io.iov_base = bp->b_un.b_addr;
#else
o = (int)bp->b_un.b_addr & PGOFSET;
npf2 = npf = btoc(bp->b_bcount + o);
/*
* Get some mapping page table entries
*/
while ((reg = rmalloc(nfsmap, (long)npf)) == 0) {
nfsmap_want++;
(void) tsleep((caddr_t)&nfsmap_want, PZERO-1, "nfsmap",
0);
}
reg--;
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[reg];
vbase = vaddr = &nfsiobuf[reg*NBPG];
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 = vbase+o;
#endif /* !defined(hp300) */
/*
* 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,
bp->b_rcred, bp->b_proc);
/*
* If a text file has been modified since it was exec'd
* blow the process' out of the water. This is the
* closest we can come to "Text File Busy" in good old
* stateless nfs.
*/
if ((vp->v_flag & VTEXT) &&
(vp->v_text->x_mtime != np->n_vattr.va_mtime.tv_sec))
xinval(vp);
} else {
uiop->uio_rw = UIO_WRITE;
nfsstats.write_physios++;
bp->b_error = error = nfs_writerpc(vp, uiop,
bp->b_wcred, bp->b_proc);
}
/*
* Finally, release pte's used by physical i/o
*/
crfree(cr);
#if !defined(hp300) && !defined(i386)
rmfree(nfsmap, (long)npf2, (long)++reg);
if (nfsmap_want) {
nfsmap_want = 0;
wakeup((caddr_t)&nfsmap_want);
}
#endif
} 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,
bp->b_proc);
break;
case VLNK:
uiop->uio_offset = 0;
nfsstats.readlink_bios++;
error = nfs_readlinkrpc(vp, uiop, bp->b_rcred,
bp->b_proc);
break;
case VDIR:
uiop->uio_offset = bp->b_lblkno;
nfsstats.readdir_bios++;
error = nfs_readdirrpc(vp, uiop, bp->b_rcred,
bp->b_proc);
/*
* 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, bp->b_proc);
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);
}
/*
* 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)
register struct vnode *vp;
int fflags;
struct ucred *cred;
int waitfor;
{
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);
}
/*
* 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");
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.