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freebsd-dev/sys/nfs/nfs_vnops.c
David Greenman efc68ce10f Fixed bmap run-length brokeness. 
Use bmap run-length extension when doing clustered paging.

Submitted by:	John Dyson
1995-02-03 06:46:28 +00:00

2590 lines
66 KiB
C
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/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)nfs_vnops.c 8.5 (Berkeley) 2/13/94
* $Id: nfs_vnops.c,v 1.11 1995/01/09 16:05:09 davidg Exp $
*/
/*
* vnode op calls for sun nfs version 2
*/
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/conf.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/dirent.h>
#include <sys/lockf.h>
#include <vm/vm.h>
#include <miscfs/specfs/specdev.h>
#include <miscfs/fifofs/fifo.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsv2.h>
#include <nfs/nfs.h>
#include <nfs/nfsnode.h>
#include <nfs/nfsmount.h>
#include <nfs/xdr_subs.h>
#include <nfs/nfsm_subs.h>
#include <nfs/nqnfs.h>
/* Defs */
#define TRUE 1
#define FALSE 0
/*
* Global vfs data structures for nfs
*/
int (**nfsv2_vnodeop_p)();
struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, nfs_lookup }, /* lookup */
{ &vop_create_desc, nfs_create }, /* create */
{ &vop_mknod_desc, nfs_mknod }, /* mknod */
{ &vop_open_desc, nfs_open }, /* open */
{ &vop_close_desc, nfs_close }, /* close */
{ &vop_access_desc, nfs_access }, /* access */
{ &vop_getattr_desc, nfs_getattr }, /* getattr */
{ &vop_setattr_desc, nfs_setattr }, /* setattr */
{ &vop_read_desc, nfs_read }, /* read */
{ &vop_write_desc, nfs_write }, /* write */
{ &vop_ioctl_desc, nfs_ioctl }, /* ioctl */
{ &vop_select_desc, nfs_select }, /* select */
{ &vop_mmap_desc, nfs_mmap }, /* mmap */
{ &vop_fsync_desc, nfs_fsync }, /* fsync */
{ &vop_seek_desc, nfs_seek }, /* seek */
{ &vop_remove_desc, nfs_remove }, /* remove */
{ &vop_link_desc, nfs_link }, /* link */
{ &vop_rename_desc, nfs_rename }, /* rename */
{ &vop_mkdir_desc, nfs_mkdir }, /* mkdir */
{ &vop_rmdir_desc, nfs_rmdir }, /* rmdir */
{ &vop_symlink_desc, nfs_symlink }, /* symlink */
{ &vop_readdir_desc, nfs_readdir }, /* readdir */
{ &vop_readlink_desc, nfs_readlink }, /* readlink */
{ &vop_abortop_desc, nfs_abortop }, /* abortop */
{ &vop_inactive_desc, nfs_inactive }, /* inactive */
{ &vop_reclaim_desc, nfs_reclaim }, /* reclaim */
{ &vop_lock_desc, nfs_lock }, /* lock */
{ &vop_unlock_desc, nfs_unlock }, /* unlock */
{ &vop_bmap_desc, nfs_bmap }, /* bmap */
{ &vop_strategy_desc, nfs_strategy }, /* strategy */
{ &vop_print_desc, nfs_print }, /* print */
{ &vop_islocked_desc, nfs_islocked }, /* islocked */
{ &vop_pathconf_desc, nfs_pathconf }, /* pathconf */
{ &vop_advlock_desc, nfs_advlock }, /* advlock */
{ &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */
{ &vop_valloc_desc, nfs_valloc }, /* valloc */
{ &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */
{ &vop_vfree_desc, nfs_vfree }, /* vfree */
{ &vop_truncate_desc, nfs_truncate }, /* truncate */
{ &vop_update_desc, nfs_update }, /* update */
{ &vop_bwrite_desc, vn_bwrite },
{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc nfsv2_vnodeop_opv_desc =
{ &nfsv2_vnodeop_p, nfsv2_vnodeop_entries };
VNODEOP_SET(nfsv2_vnodeop_opv_desc);
/*
* Special device vnode ops
*/
int (**spec_nfsv2nodeop_p)();
struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, spec_lookup }, /* lookup */
{ &vop_create_desc, spec_create }, /* create */
{ &vop_mknod_desc, spec_mknod }, /* mknod */
{ &vop_open_desc, spec_open }, /* open */
{ &vop_close_desc, nfsspec_close }, /* close */
{ &vop_access_desc, nfsspec_access }, /* access */
{ &vop_getattr_desc, nfs_getattr }, /* getattr */
{ &vop_setattr_desc, nfs_setattr }, /* setattr */
{ &vop_read_desc, nfsspec_read }, /* read */
{ &vop_write_desc, nfsspec_write }, /* write */
{ &vop_ioctl_desc, spec_ioctl }, /* ioctl */
{ &vop_select_desc, spec_select }, /* select */
{ &vop_mmap_desc, spec_mmap }, /* mmap */
{ &vop_fsync_desc, nfs_fsync }, /* fsync */
{ &vop_seek_desc, spec_seek }, /* seek */
{ &vop_remove_desc, spec_remove }, /* remove */
{ &vop_link_desc, spec_link }, /* link */
{ &vop_rename_desc, spec_rename }, /* rename */
{ &vop_mkdir_desc, spec_mkdir }, /* mkdir */
{ &vop_rmdir_desc, spec_rmdir }, /* rmdir */
{ &vop_symlink_desc, spec_symlink }, /* symlink */
{ &vop_readdir_desc, spec_readdir }, /* readdir */
{ &vop_readlink_desc, spec_readlink }, /* readlink */
{ &vop_abortop_desc, spec_abortop }, /* abortop */
{ &vop_inactive_desc, nfs_inactive }, /* inactive */
{ &vop_reclaim_desc, nfs_reclaim }, /* reclaim */
{ &vop_lock_desc, nfs_lock }, /* lock */
{ &vop_unlock_desc, nfs_unlock }, /* unlock */
{ &vop_bmap_desc, spec_bmap }, /* bmap */
{ &vop_strategy_desc, spec_strategy }, /* strategy */
{ &vop_print_desc, nfs_print }, /* print */
{ &vop_islocked_desc, nfs_islocked }, /* islocked */
{ &vop_pathconf_desc, spec_pathconf }, /* pathconf */
{ &vop_advlock_desc, spec_advlock }, /* advlock */
{ &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */
{ &vop_valloc_desc, spec_valloc }, /* valloc */
{ &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */
{ &vop_vfree_desc, spec_vfree }, /* vfree */
{ &vop_truncate_desc, spec_truncate }, /* truncate */
{ &vop_update_desc, nfs_update }, /* update */
{ &vop_bwrite_desc, vn_bwrite },
{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc spec_nfsv2nodeop_opv_desc =
{ &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries };
VNODEOP_SET(spec_nfsv2nodeop_opv_desc);
int (**fifo_nfsv2nodeop_p)();
struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, fifo_lookup }, /* lookup */
{ &vop_create_desc, fifo_create }, /* create */
{ &vop_mknod_desc, fifo_mknod }, /* mknod */
{ &vop_open_desc, fifo_open }, /* open */
{ &vop_close_desc, nfsfifo_close }, /* close */
{ &vop_access_desc, nfsspec_access }, /* access */
{ &vop_getattr_desc, nfs_getattr }, /* getattr */
{ &vop_setattr_desc, nfs_setattr }, /* setattr */
{ &vop_read_desc, nfsfifo_read }, /* read */
{ &vop_write_desc, nfsfifo_write }, /* write */
{ &vop_ioctl_desc, fifo_ioctl }, /* ioctl */
{ &vop_select_desc, fifo_select }, /* select */
{ &vop_mmap_desc, fifo_mmap }, /* mmap */
{ &vop_fsync_desc, nfs_fsync }, /* fsync */
{ &vop_seek_desc, fifo_seek }, /* seek */
{ &vop_remove_desc, fifo_remove }, /* remove */
{ &vop_link_desc, fifo_link }, /* link */
{ &vop_rename_desc, fifo_rename }, /* rename */
{ &vop_mkdir_desc, fifo_mkdir }, /* mkdir */
{ &vop_rmdir_desc, fifo_rmdir }, /* rmdir */
{ &vop_symlink_desc, fifo_symlink }, /* symlink */
{ &vop_readdir_desc, fifo_readdir }, /* readdir */
{ &vop_readlink_desc, fifo_readlink }, /* readlink */
{ &vop_abortop_desc, fifo_abortop }, /* abortop */
{ &vop_inactive_desc, nfs_inactive }, /* inactive */
{ &vop_reclaim_desc, nfs_reclaim }, /* reclaim */
{ &vop_lock_desc, nfs_lock }, /* lock */
{ &vop_unlock_desc, nfs_unlock }, /* unlock */
{ &vop_bmap_desc, fifo_bmap }, /* bmap */
{ &vop_strategy_desc, fifo_badop }, /* strategy */
{ &vop_print_desc, nfs_print }, /* print */
{ &vop_islocked_desc, nfs_islocked }, /* islocked */
{ &vop_pathconf_desc, fifo_pathconf }, /* pathconf */
{ &vop_advlock_desc, fifo_advlock }, /* advlock */
{ &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */
{ &vop_valloc_desc, fifo_valloc }, /* valloc */
{ &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */
{ &vop_vfree_desc, fifo_vfree }, /* vfree */
{ &vop_truncate_desc, fifo_truncate }, /* truncate */
{ &vop_update_desc, nfs_update }, /* update */
{ &vop_bwrite_desc, vn_bwrite },
{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc =
{ &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries };
VNODEOP_SET(fifo_nfsv2nodeop_opv_desc);
void nqnfs_clientlease();
/*
* Global variables
*/
extern u_long nfs_procids[NFS_NPROCS];
extern u_long nfs_prog, nfs_vers, nfs_true, nfs_false;
struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
int nfs_numasync = 0;
#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
/*
* nfs null call from vfs.
*/
int
nfs_null(vp, cred, procp)
struct vnode *vp;
struct ucred *cred;
struct proc *procp;
{
caddr_t bpos, dpos;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb;
nfsm_reqhead(vp, NFSPROC_NULL, 0);
nfsm_request(vp, NFSPROC_NULL, procp, cred);
nfsm_reqdone;
return (error);
}
/*
* nfs access vnode op.
* For nfs, just return ok. File accesses may fail later.
* For nqnfs, use the access rpc to check accessibility. If file modes are
* changed on the server, accesses might still fail later.
*/
int
nfs_access(ap)
struct vop_access_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register u_long *tl;
register caddr_t cp;
caddr_t bpos, dpos;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
/*
* For nqnfs, do an access rpc, otherwise you are stuck emulating
* ufs_access() locally using the vattr. This may not be correct,
* since the server may apply other access criteria such as
* client uid-->server uid mapping that we do not know about, but
* this is better than just returning anything that is lying about
* in the cache.
*/
if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
nfsstats.rpccnt[NQNFSPROC_ACCESS]++;
nfsm_reqhead(vp, NQNFSPROC_ACCESS, NFSX_FH + 3 * NFSX_UNSIGNED);
nfsm_fhtom(vp);
nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED);
if (ap->a_mode & VREAD)
*tl++ = nfs_true;
else
*tl++ = nfs_false;
if (ap->a_mode & VWRITE)
*tl++ = nfs_true;
else
*tl++ = nfs_false;
if (ap->a_mode & VEXEC)
*tl = nfs_true;
else
*tl = nfs_false;
nfsm_request(vp, NQNFSPROC_ACCESS, ap->a_p, ap->a_cred);
nfsm_reqdone;
return (error);
} else
return (nfsspec_access(ap));
}
/*
* nfs open vnode op
* Check to see if the type is ok
* and that deletion is not in progress.
* For paged in text files, you will need to flush the page cache
* if consistency is lost.
*/
/* ARGSUSED */
int
nfs_open(ap)
struct vop_open_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
struct nfsnode *np = VTONFS(vp);
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
struct vattr vattr;
int error;
if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
return (EACCES);
/*
* Get a valid lease. If cached data is stale, flush it.
*/
if (nmp->nm_flag & NFSMNT_NQNFS) {
if (NQNFS_CKINVALID(vp, np, NQL_READ)) {
do {
error = nqnfs_getlease(vp, NQL_READ, ap->a_cred, ap->a_p);
} while (error == NQNFS_EXPIRED);
if (error)
return (error);
if (np->n_lrev != np->n_brev ||
(np->n_flag & NQNFSNONCACHE)) {
if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
ap->a_p, 1)) == EINTR)
return (error);
np->n_brev = np->n_lrev;
}
}
} else {
if (np->n_flag & NMODIFIED) {
if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
ap->a_p, 1)) == EINTR)
return (error);
np->n_attrstamp = 0;
np->n_direofoffset = 0;
error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p);
if (error)
return (error);
np->n_mtime = vattr.va_mtime.ts_sec;
} else {
error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p);
if (error)
return (error);
if (np->n_mtime != vattr.va_mtime.ts_sec) {
np->n_direofoffset = 0;
if ((error = nfs_vinvalbuf(vp, V_SAVE,
ap->a_cred, ap->a_p, 1)) == EINTR)
return (error);
np->n_mtime = vattr.va_mtime.ts_sec;
}
}
}
if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
np->n_attrstamp = 0; /* For Open/Close consistency */
return (0);
}
/*
* nfs close vnode op
* For reg files, invalidate any buffer cache entries.
*/
/* ARGSUSED */
int
nfs_close(ap)
struct vop_close_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
int error = 0;
if (vp->v_type == VREG) {
if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 &&
(np->n_flag & NMODIFIED)) {
error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1);
np->n_attrstamp = 0;
}
if (np->n_flag & NWRITEERR) {
np->n_flag &= ~NWRITEERR;
error = np->n_error;
}
}
return (error);
}
/*
* nfs getattr call from vfs.
*/
int
nfs_getattr(ap)
struct vop_getattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
register caddr_t cp;
caddr_t bpos, dpos;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
/*
* Update local times for special files.
*/
if (np->n_flag & (NACC | NUPD))
np->n_flag |= NCHG;
/*
* First look in the cache.
*/
if (nfs_getattrcache(vp, ap->a_vap) == 0)
return (0);
nfsstats.rpccnt[NFSPROC_GETATTR]++;
nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH);
nfsm_fhtom(vp);
nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred);
nfsm_loadattr(vp, ap->a_vap);
nfsm_reqdone;
return (error);
}
/*
* nfs setattr call.
*/
int
nfs_setattr(ap)
struct vop_setattr_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
register struct nfsv2_sattr *sp;
register caddr_t cp;
register long t1;
caddr_t bpos, dpos, cp2;
u_long *tl;
int error = 0, isnq;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
register struct vattr *vap = ap->a_vap;
u_quad_t frev, tsize = 0;
if (vap->va_size != VNOVAL) {
switch (vp->v_type) {
case VDIR:
return (EISDIR);
case VCHR:
case VBLK:
if (vap->va_mtime.ts_sec == VNOVAL &&
vap->va_atime.ts_sec == VNOVAL &&
vap->va_mode == (u_short)VNOVAL &&
vap->va_uid == VNOVAL &&
vap->va_gid == VNOVAL)
return (0);
vap->va_size = VNOVAL;
break;
default:
if (np->n_flag & NMODIFIED) {
error = nfs_vinvalbuf(vp,
vap->va_size ? V_SAVE : 0,
ap->a_cred, ap->a_p, 1);
if (error)
return (error);
}
tsize = np->n_size;
np->n_size = np->n_vattr.va_size = vap->va_size;
vnode_pager_setsize(vp, (u_long)np->n_size);
}
} else if ((vap->va_mtime.ts_sec != VNOVAL ||
vap->va_atime.ts_sec != VNOVAL) && (np->n_flag & NMODIFIED)) {
error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1);
if (error == EINTR)
return (error);
}
nfsstats.rpccnt[NFSPROC_SETATTR]++;
isnq = (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS);
nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH+NFSX_SATTR(isnq));
nfsm_fhtom(vp);
nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR(isnq));
if (vap->va_mode == (u_short)-1)
sp->sa_mode = VNOVAL;
else
sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode);
if (vap->va_uid == (uid_t)-1)
sp->sa_uid = VNOVAL;
else
sp->sa_uid = txdr_unsigned(vap->va_uid);
if (vap->va_gid == (gid_t)-1)
sp->sa_gid = VNOVAL;
else
sp->sa_gid = txdr_unsigned(vap->va_gid);
if (isnq) {
txdr_hyper(&vap->va_size, &sp->sa_nqsize);
txdr_nqtime(&vap->va_atime, &sp->sa_nqatime);
txdr_nqtime(&vap->va_mtime, &sp->sa_nqmtime);
sp->sa_nqflags = txdr_unsigned(vap->va_flags);
sp->sa_nqrdev = VNOVAL;
} else {
sp->sa_nfssize = txdr_unsigned(vap->va_size);
txdr_nfstime(&vap->va_atime, &sp->sa_nfsatime);
txdr_nfstime(&vap->va_mtime, &sp->sa_nfsmtime);
}
nfsm_request(vp, NFSPROC_SETATTR, ap->a_p, ap->a_cred);
nfsm_loadattr(vp, (struct vattr *)0);
if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) &&
NQNFS_CKCACHABLE(vp, NQL_WRITE)) {
nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED);
fxdr_hyper(tl, &frev);
if (frev > np->n_brev)
np->n_brev = frev;
}
nfsm_reqdone;
if (error) {
np->n_size = np->n_vattr.va_size = tsize;
vnode_pager_setsize(vp, (u_long)np->n_size);
}
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
*/
int
nfs_lookup(ap)
struct vop_lookup_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
} */ *ap;
{
register struct componentname *cnp = ap->a_cnp;
register struct vnode *dvp = ap->a_dvp;
register struct vnode **vpp = ap->a_vpp;
register int flags = cnp->cn_flags;
register struct vnode *vdp;
register u_long *tl;
register caddr_t cp;
register long t1, t2;
struct nfsmount *nmp;
caddr_t bpos, dpos, cp2;
time_t reqtime = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct vnode *newvp;
long len;
nfsv2fh_t *fhp;
struct nfsnode *np;
int lockparent, wantparent, error = 0;
int nqlflag = 0, cachable = 0;
u_quad_t frev;
*vpp = NULL;
if (dvp->v_type != VDIR)
return (ENOTDIR);
lockparent = flags & LOCKPARENT;
wantparent = flags & (LOCKPARENT|WANTPARENT);
nmp = VFSTONFS(dvp->v_mount);
np = VTONFS(dvp);
if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) {
struct vattr vattr;
int vpid;
vdp = *vpp;
vpid = vdp->v_id;
/*
* See the comment starting `Step through' in ufs/ufs_lookup.c
* for an explanation of the locking protocol
*/
if (dvp == vdp) {
VREF(vdp);
error = 0;
} else
error = vget(vdp, 1);
if (!error) {
if (vpid == vdp->v_id) {
if (nmp->nm_flag & NFSMNT_NQNFS) {
if ((nmp->nm_flag & NFSMNT_NQLOOKLEASE) == 0) {
nfsstats.lookupcache_hits++;
if (cnp->cn_nameiop != LOOKUP &&
(flags & ISLASTCN))
cnp->cn_flags |= SAVENAME;
return (0);
} else if (NQNFS_CKCACHABLE(dvp, NQL_READ)) {
if (np->n_lrev != np->n_brev ||
(np->n_flag & NMODIFIED)) {
np->n_direofoffset = 0;
cache_purge(dvp);
error = nfs_vinvalbuf(dvp, 0,
cnp->cn_cred, cnp->cn_proc,
1);
if (error == EINTR)
return (error);
np->n_brev = np->n_lrev;
} else {
nfsstats.lookupcache_hits++;
if (cnp->cn_nameiop != LOOKUP &&
(flags & ISLASTCN))
cnp->cn_flags |= SAVENAME;
return (0);
}
}
} else if (!VOP_GETATTR(vdp, &vattr, cnp->cn_cred, cnp->cn_proc) &&
vattr.va_ctime.ts_sec == VTONFS(vdp)->n_ctime) {
nfsstats.lookupcache_hits++;
if (cnp->cn_nameiop != LOOKUP &&
(flags & ISLASTCN))
cnp->cn_flags |= SAVENAME;
return (0);
}
cache_purge(vdp);
}
vrele(vdp);
}
*vpp = NULLVP;
}
error = 0;
nfsstats.lookupcache_misses++;
nfsstats.rpccnt[NFSPROC_LOOKUP]++;
len = cnp->cn_namelen;
nfsm_reqhead(dvp, NFSPROC_LOOKUP, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
/*
* For nqnfs optionally piggyback a getlease request for the name
* being looked up.
*/
if (nmp->nm_flag & NFSMNT_NQNFS) {
nfsm_build(tl, u_long *, NFSX_UNSIGNED);
if ((nmp->nm_flag & NFSMNT_NQLOOKLEASE) &&
((cnp->cn_flags & MAKEENTRY) &&
(cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))))
*tl = txdr_unsigned(nmp->nm_leaseterm);
else
*tl = 0;
}
nfsm_fhtom(dvp);
nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
reqtime = time.tv_sec;
nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred);
nfsmout:
if (error) {
if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
(flags & ISLASTCN) && error == ENOENT)
error = EJUSTRETURN;
if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
cnp->cn_flags |= SAVENAME;
return (error);
}
if (nmp->nm_flag & NFSMNT_NQNFS) {
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
if (*tl) {
nqlflag = fxdr_unsigned(int, *tl);
nfsm_dissect(tl, u_long *, 4*NFSX_UNSIGNED);
cachable = fxdr_unsigned(int, *tl++);
reqtime += fxdr_unsigned(int, *tl++);
fxdr_hyper(tl, &frev);
} else
nqlflag = 0;
}
nfsm_dissect(fhp, nfsv2fh_t *, NFSX_FH);
/*
* Handle RENAME case...
*/
if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) {
if (!bcmp(np->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
m_freem(mrep);
return (EISDIR);
}
error = nfs_nget(dvp->v_mount, fhp, &np);
if (error) {
m_freem(mrep);
return (error);
}
newvp = NFSTOV(np);
error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr*)0);
if (error) {
vrele(newvp);
m_freem(mrep);
return (error);
}
*vpp = newvp;
m_freem(mrep);
cnp->cn_flags |= SAVENAME;
return (0);
}
if (!bcmp(np->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
VREF(dvp);
newvp = dvp;
} else {
error = nfs_nget(dvp->v_mount, fhp, &np);
if (error) {
m_freem(mrep);
return (error);
}
newvp = NFSTOV(np);
}
error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0);
if (error) {
vrele(newvp);
m_freem(mrep);
return (error);
}
m_freem(mrep);
*vpp = newvp;
if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
cnp->cn_flags |= SAVENAME;
if ((cnp->cn_flags & MAKEENTRY) &&
(cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) {
if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
np->n_ctime = np->n_vattr.va_ctime.ts_sec;
else if (nqlflag && reqtime > time.tv_sec)
nqnfs_clientlease(nmp, np, nqlflag, cachable, reqtime,
frev);
cache_enter(dvp, *vpp, cnp);
}
return (0);
}
/*
* nfs read call.
* Just call nfs_bioread() to do the work.
*/
int
nfs_read(ap)
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
if (vp->v_type != VREG)
return (EPERM);
return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
}
/*
* nfs readlink call
*/
int
nfs_readlink(ap)
struct vop_readlink_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
if (vp->v_type != VLNK)
return (EPERM);
return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred));
}
/*
* Do a readlink rpc.
* Called by nfs_doio() from below the buffer cache.
*/
int
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;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
long len;
nfsstats.rpccnt[NFSPROC_READLINK]++;
nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH);
nfsm_fhtom(vp);
nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred);
nfsm_strsiz(len, NFS_MAXPATHLEN);
nfsm_mtouio(uiop, len);
nfsm_reqdone;
return (error);
}
/*
* nfs read rpc call
* Ditto above
*/
int
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;
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;
if (uiop->uio_offset + tsiz > 0xffffffff &&
(nmp->nm_flag & NFSMNT_NQNFS) == 0)
return (EFBIG);
while (tsiz > 0) {
nfsstats.rpccnt[NFSPROC_READ]++;
len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH+NFSX_UNSIGNED*3);
nfsm_fhtom(vp);
nfsm_build(tl, u_long *, NFSX_UNSIGNED*3);
if (nmp->nm_flag & NFSMNT_NQNFS) {
txdr_hyper(&uiop->uio_offset, tl);
*(tl + 2) = txdr_unsigned(len);
} else {
*tl++ = txdr_unsigned(uiop->uio_offset);
*tl++ = txdr_unsigned(len);
*tl = 0;
}
nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred);
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
*/
int
nfs_writerpc(vp, uiop, cred, ioflags)
register struct vnode *vp;
struct uio *uiop;
struct ucred *cred;
int ioflags;
{
register u_long *tl;
register caddr_t cp;
register long t1;
caddr_t bpos, dpos, cp2;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct nfsmount *nmp;
struct nfsnode *np = VTONFS(vp);
u_quad_t frev;
long len, tsiz;
nmp = VFSTONFS(vp->v_mount);
tsiz = uiop->uio_resid;
if (uiop->uio_offset + tsiz > 0xffffffff &&
(nmp->nm_flag & NFSMNT_NQNFS) == 0)
return (EFBIG);
while (tsiz > 0) {
nfsstats.rpccnt[NFSPROC_WRITE]++;
len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
nfsm_reqhead(vp, NFSPROC_WRITE,
NFSX_FH+NFSX_UNSIGNED*4+nfsm_rndup(len));
nfsm_fhtom(vp);
nfsm_build(tl, u_long *, NFSX_UNSIGNED * 4);
if (nmp->nm_flag & NFSMNT_NQNFS) {
txdr_hyper(&uiop->uio_offset, tl);
tl += 2;
#ifdef notyet
if (ioflags & IO_APPEND)
*tl++ = txdr_unsigned(1);
else
#endif
*tl++ = 0;
} else {
*++tl = txdr_unsigned(uiop->uio_offset);
tl += 2;
}
*tl = txdr_unsigned(len);
nfsm_uiotom(uiop, len);
nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred);
nfsm_loadattr(vp, (struct vattr *)0);
if (nmp->nm_flag & NFSMNT_MYWRITE)
VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.ts_sec;
else if ((nmp->nm_flag & NFSMNT_NQNFS) &&
NQNFS_CKCACHABLE(vp, NQL_WRITE)) {
nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED);
fxdr_hyper(tl, &frev);
if (frev > np->n_brev)
np->n_brev = frev;
}
m_freem(mrep);
tsiz -= len;
}
nfsmout:
if (error)
uiop->uio_resid = tsiz;
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 */
int
nfs_mknod(ap)
struct vop_mknod_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap;
{
register struct vnode *dvp = ap->a_dvp;
register struct vattr *vap = ap->a_vap;
register struct componentname *cnp = ap->a_cnp;
register struct nfsv2_sattr *sp;
register u_long *tl;
register caddr_t cp;
register long t1, t2;
struct vnode *newvp = 0;
struct vattr vattr;
char *cp2;
caddr_t bpos, dpos;
int error = 0, isnq;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
u_long rdev;
isnq = (VFSTONFS(dvp->v_mount)->nm_flag & NFSMNT_NQNFS);
if (vap->va_type == VCHR || vap->va_type == VBLK)
rdev = txdr_unsigned(vap->va_rdev);
else if (vap->va_type == VFIFO)
rdev = 0xffffffff;
else {
VOP_ABORTOP(dvp, cnp);
vput(dvp);
return (EOPNOTSUPP);
}
error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc);
if (error) {
VOP_ABORTOP(dvp, cnp);
vput(dvp);
return (error);
}
newvp = NULLVP;
nfsstats.rpccnt[NFSPROC_CREATE]++;
nfsm_reqhead(dvp, NFSPROC_CREATE,
NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)+NFSX_SATTR(isnq));
nfsm_fhtom(dvp);
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR(isnq));
sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode);
sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid);
sp->sa_gid = txdr_unsigned(vattr.va_gid);
if (isnq) {
sp->sa_nqrdev = rdev;
sp->sa_nqflags = 0;
txdr_nqtime(&vap->va_atime, &sp->sa_nqatime);
txdr_nqtime(&vap->va_mtime, &sp->sa_nqmtime);
} else {
sp->sa_nfssize = rdev;
txdr_nfstime(&vap->va_atime, &sp->sa_nfsatime);
txdr_nfstime(&vap->va_mtime, &sp->sa_nfsmtime);
}
nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred);
nfsm_mtofh(dvp, newvp);
nfsm_reqdone;
if (!error && (cnp->cn_flags & MAKEENTRY))
cache_enter(dvp, newvp, cnp);
FREE(cnp->cn_pnbuf, M_NAMEI);
VTONFS(dvp)->n_flag |= NMODIFIED;
VTONFS(dvp)->n_attrstamp = 0;
vrele(dvp);
if (newvp != NULLVP)
vrele(newvp);
return (error);
}
/*
* nfs file create call
*/
int
nfs_create(ap)
struct vop_create_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap;
{
register struct vnode *dvp = ap->a_dvp;
register struct vattr *vap = ap->a_vap;
register struct componentname *cnp = ap->a_cnp;
register struct nfsv2_sattr *sp;
register u_long *tl;
register caddr_t cp;
register long t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, isnq;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct vattr vattr;
error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc);
if (error) {
VOP_ABORTOP(dvp, cnp);
vput(dvp);
return (error);
}
nfsstats.rpccnt[NFSPROC_CREATE]++;
isnq = (VFSTONFS(dvp->v_mount)->nm_flag & NFSMNT_NQNFS);
nfsm_reqhead(dvp, NFSPROC_CREATE,
NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)+NFSX_SATTR(isnq));
nfsm_fhtom(dvp);
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR(isnq));
sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode);
sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid);
sp->sa_gid = txdr_unsigned(vattr.va_gid);
if (isnq) {
u_quad_t qval = 0;
txdr_hyper(&qval, &sp->sa_nqsize);
sp->sa_nqflags = 0;
sp->sa_nqrdev = -1;
txdr_nqtime(&vap->va_atime, &sp->sa_nqatime);
txdr_nqtime(&vap->va_mtime, &sp->sa_nqmtime);
} else {
sp->sa_nfssize = 0;
txdr_nfstime(&vap->va_atime, &sp->sa_nfsatime);
txdr_nfstime(&vap->va_mtime, &sp->sa_nfsmtime);
}
nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred);
nfsm_mtofh(dvp, *ap->a_vpp);
nfsm_reqdone;
if (!error && (cnp->cn_flags & MAKEENTRY))
cache_enter(dvp, *ap->a_vpp, cnp);
FREE(cnp->cn_pnbuf, M_NAMEI);
VTONFS(dvp)->n_flag |= NMODIFIED;
VTONFS(dvp)->n_attrstamp = 0;
vrele(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
*/
int
nfs_remove(ap)
struct vop_remove_args /* {
struct vnodeop_desc *a_desc;
struct vnode * a_dvp;
struct vnode * a_vp;
struct componentname * a_cnp;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct vnode *dvp = ap->a_dvp;
register struct componentname *cnp = ap->a_cnp;
register struct nfsnode *np = VTONFS(vp);
register u_long *tl;
register caddr_t cp;
register long t2;
caddr_t bpos, dpos;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct vattr vattr;
if (vp->v_usecount > 1) {
if (!np->n_sillyrename)
error = nfs_sillyrename(dvp, vp, cnp);
else if (VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc)
== 0 && vattr.va_nlink > 1)
/*
* If we already have a silly name but there are more
* than one links, just proceed with the NFS remove
* request, as the bits will remain available (modulo
* network races). This avoids silently ignoring the
* attempted removal of a non-silly entry.
*/
goto doit;
} else {
doit:
/*
* Purge the name cache so that the chance of a lookup for
* the name succeeding while the remove is in progress is
* minimized. Without node locking it can still happen, such
* that an I/O op returns ESTALE, but since you get this if
* another host removes the file..
*/
cache_purge(vp);
/*
* Throw away biocache buffers. Mainly to avoid
* unnecessary delayed writes.
*/
error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1);
if (error == EINTR)
return (error);
/* Do the rpc */
nfsstats.rpccnt[NFSPROC_REMOVE]++;
nfsm_reqhead(dvp, NFSPROC_REMOVE,
NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen));
nfsm_fhtom(dvp);
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
nfsm_request(dvp, NFSPROC_REMOVE, cnp->cn_proc, cnp->cn_cred);
nfsm_reqdone;
FREE(cnp->cn_pnbuf, M_NAMEI);
VTONFS(dvp)->n_flag |= NMODIFIED;
VTONFS(dvp)->n_attrstamp = 0;
/*
* 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;
vrele(dvp);
vrele(vp);
return (error);
}
/*
* nfs file remove rpc called from nfs_inactive
*/
int
nfs_removeit(sp)
register struct sillyrename *sp;
{
register u_long *tl;
register caddr_t cp;
register long t2;
caddr_t bpos, dpos;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
nfsstats.rpccnt[NFSPROC_REMOVE]++;
nfsm_reqhead(sp->s_dvp, NFSPROC_REMOVE,
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, NULL, sp->s_cred);
nfsm_reqdone;
VTONFS(sp->s_dvp)->n_flag |= NMODIFIED;
VTONFS(sp->s_dvp)->n_attrstamp = 0;
return (error);
}
/*
* nfs file rename call
*/
int
nfs_rename(ap)
struct vop_rename_args /* {
struct vnode *a_fdvp;
struct vnode *a_fvp;
struct componentname *a_fcnp;
struct vnode *a_tdvp;
struct vnode *a_tvp;
struct componentname *a_tcnp;
} */ *ap;
{
register struct vnode *fvp = ap->a_fvp;
register struct vnode *tvp = ap->a_tvp;
register struct vnode *fdvp = ap->a_fdvp;
register struct vnode *tdvp = ap->a_tdvp;
register struct componentname *tcnp = ap->a_tcnp;
register struct componentname *fcnp = ap->a_fcnp;
register u_long *tl;
register caddr_t cp;
register long t2;
caddr_t bpos, dpos;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
/* Check for cross-device rename */
if ((fvp->v_mount != tdvp->v_mount) ||
(tvp && (fvp->v_mount != tvp->v_mount))) {
error = EXDEV;
goto out;
}
nfsstats.rpccnt[NFSPROC_RENAME]++;
nfsm_reqhead(fdvp, NFSPROC_RENAME,
(NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(fcnp->cn_namelen)+
nfsm_rndup(fcnp->cn_namelen)); /* or fcnp->cn_cred?*/
nfsm_fhtom(fdvp);
nfsm_strtom(fcnp->cn_nameptr, fcnp->cn_namelen, NFS_MAXNAMLEN);
nfsm_fhtom(tdvp);
nfsm_strtom(tcnp->cn_nameptr, tcnp->cn_namelen, NFS_MAXNAMLEN);
nfsm_request(fdvp, NFSPROC_RENAME, tcnp->cn_proc, tcnp->cn_cred);
nfsm_reqdone;
VTONFS(fdvp)->n_flag |= NMODIFIED;
VTONFS(fdvp)->n_attrstamp = 0;
VTONFS(tdvp)->n_flag |= NMODIFIED;
VTONFS(tdvp)->n_attrstamp = 0;
if (fvp->v_type == VDIR) {
if (tvp != NULL && tvp->v_type == VDIR)
cache_purge(tdvp);
cache_purge(fdvp);
}
out:
if (tdvp == tvp)
vrele(tdvp);
else
vput(tdvp);
if (tvp)
vput(tvp);
vrele(fdvp);
vrele(fvp);
/*
* 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
*/
int
nfs_renameit(sdvp, scnp, sp)
struct vnode *sdvp;
struct componentname *scnp;
register struct sillyrename *sp;
{
register u_long *tl;
register caddr_t cp;
register long t2;
caddr_t bpos, dpos;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
nfsstats.rpccnt[NFSPROC_RENAME]++;
nfsm_reqhead(sdvp, NFSPROC_RENAME,
(NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(scnp->cn_namelen)+
nfsm_rndup(sp->s_namlen));
nfsm_fhtom(sdvp);
nfsm_strtom(scnp->cn_nameptr, scnp->cn_namelen, NFS_MAXNAMLEN);
nfsm_fhtom(sdvp);
nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN);
nfsm_request(sdvp, NFSPROC_RENAME, scnp->cn_proc, scnp->cn_cred);
nfsm_reqdone;
FREE(scnp->cn_pnbuf, M_NAMEI);
VTONFS(sdvp)->n_flag |= NMODIFIED;
VTONFS(sdvp)->n_attrstamp = 0;
return (error);
}
/*
* nfs hard link create call
*/
int
nfs_link(ap)
struct vop_link_args /* {
struct vnode *a_vp;
struct vnode *a_tdvp;
struct componentname *a_cnp;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct vnode *tdvp = ap->a_tdvp;
register struct componentname *cnp = ap->a_cnp;
register u_long *tl;
register caddr_t cp;
register long t2;
caddr_t bpos, dpos;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
if (vp->v_mount != tdvp->v_mount) {
/*VOP_ABORTOP(vp, cnp);*/
if (tdvp == vp)
vrele(vp);
else
vput(vp);
return (EXDEV);
}
/*
* Push all writes to the server, so that the attribute cache
* doesn't get "out of sync" with the server.
* XXX There should be a better way!
*/
VOP_FSYNC(tdvp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc);
nfsstats.rpccnt[NFSPROC_LINK]++;
nfsm_reqhead(tdvp, NFSPROC_LINK,
NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen));
nfsm_fhtom(tdvp);
nfsm_fhtom(vp);
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
nfsm_request(tdvp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred);
nfsm_reqdone;
FREE(cnp->cn_pnbuf, M_NAMEI);
VTONFS(tdvp)->n_attrstamp = 0;
VTONFS(vp)->n_flag |= NMODIFIED;
VTONFS(vp)->n_attrstamp = 0;
vrele(vp);
/*
* 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
*/
/* start here */
int
nfs_symlink(ap)
struct vop_symlink_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
char *a_target;
} */ *ap;
{
register struct vnode *dvp = ap->a_dvp;
register struct vattr *vap = ap->a_vap;
register struct componentname *cnp = ap->a_cnp;
register struct nfsv2_sattr *sp;
register u_long *tl;
register caddr_t cp;
register long t2;
caddr_t bpos, dpos;
int slen, error = 0, isnq;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
nfsstats.rpccnt[NFSPROC_SYMLINK]++;
slen = strlen(ap->a_target);
isnq = (VFSTONFS(dvp->v_mount)->nm_flag & NFSMNT_NQNFS);
nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH+2*NFSX_UNSIGNED+
nfsm_rndup(cnp->cn_namelen)+nfsm_rndup(slen)+NFSX_SATTR(isnq));
nfsm_fhtom(dvp);
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR(isnq));
sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode);
sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid);
sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid);
if (isnq) {
quad_t qval = -1;
txdr_hyper(&qval, &sp->sa_nqsize);
sp->sa_nqflags = 0;
txdr_nqtime(&vap->va_atime, &sp->sa_nqatime);
txdr_nqtime(&vap->va_mtime, &sp->sa_nqmtime);
} else {
sp->sa_nfssize = -1;
txdr_nfstime(&vap->va_atime, &sp->sa_nfsatime);
txdr_nfstime(&vap->va_mtime, &sp->sa_nfsmtime);
}
nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred);
nfsm_reqdone;
FREE(cnp->cn_pnbuf, M_NAMEI);
VTONFS(dvp)->n_flag |= NMODIFIED;
VTONFS(dvp)->n_attrstamp = 0;
vrele(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
*/
int
nfs_mkdir(ap)
struct vop_mkdir_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap;
{
register struct vnode *dvp = ap->a_dvp;
register struct vattr *vap = ap->a_vap;
register struct componentname *cnp = ap->a_cnp;
register struct vnode **vpp = ap->a_vpp;
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;
int error = 0, firsttry = 1, isnq;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct vattr vattr;
error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc);
if (error) {
VOP_ABORTOP(dvp, cnp);
vput(dvp);
return (error);
}
len = cnp->cn_namelen;
isnq = (VFSTONFS(dvp->v_mount)->nm_flag & NFSMNT_NQNFS);
nfsstats.rpccnt[NFSPROC_MKDIR]++;
nfsm_reqhead(dvp, NFSPROC_MKDIR,
NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR(isnq));
nfsm_fhtom(dvp);
nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR(isnq));
sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode);
sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid);
sp->sa_gid = txdr_unsigned(vattr.va_gid);
if (isnq) {
quad_t qval = -1;
txdr_hyper(&qval, &sp->sa_nqsize);
sp->sa_nqflags = 0;
txdr_nqtime(&vap->va_atime, &sp->sa_nqatime);
txdr_nqtime(&vap->va_mtime, &sp->sa_nqmtime);
} else {
sp->sa_nfssize = -1;
txdr_nfstime(&vap->va_atime, &sp->sa_nfsatime);
txdr_nfstime(&vap->va_mtime, &sp->sa_nfsmtime);
}
nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred);
nfsm_mtofh(dvp, *vpp);
nfsm_reqdone;
VTONFS(dvp)->n_flag |= NMODIFIED;
VTONFS(dvp)->n_attrstamp = 0;
/*
* 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]++;
*vpp = NULL;
nfsm_reqhead(dvp, NFSPROC_LOOKUP,
NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
nfsm_fhtom(dvp);
nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred);
nfsm_mtofh(dvp, *vpp);
if ((*vpp)->v_type != VDIR) {
vput(*vpp);
error = EEXIST;
}
m_freem(mrep);
}
FREE(cnp->cn_pnbuf, M_NAMEI);
vrele(dvp);
return (error);
}
/*
* nfs remove directory call
*/
int
nfs_rmdir(ap)
struct vop_rmdir_args /* {
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct vnode *dvp = ap->a_dvp;
register struct componentname *cnp = ap->a_cnp;
register u_long *tl;
register caddr_t cp;
register long t2;
caddr_t bpos, dpos;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
if (dvp == vp) {
vrele(dvp);
vrele(dvp);
FREE(cnp->cn_pnbuf, M_NAMEI);
return (EINVAL);
}
nfsstats.rpccnt[NFSPROC_RMDIR]++;
nfsm_reqhead(dvp, NFSPROC_RMDIR,
NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen));
nfsm_fhtom(dvp);
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred);
nfsm_reqdone;
FREE(cnp->cn_pnbuf, M_NAMEI);
VTONFS(dvp)->n_flag |= NMODIFIED;
VTONFS(dvp)->n_attrstamp = 0;
cache_purge(dvp);
cache_purge(vp);
vrele(vp);
vrele(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.
*/
int
nfs_readdir(ap)
struct vop_readdir_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
register struct uio *uio = ap->a_uio;
int tresid, error;
struct vattr vattr;
if (vp->v_type != VDIR)
return (EPERM);
/*
* First, check for hit on the EOF offset cache
*/
if (uio->uio_offset != 0 && uio->uio_offset == np->n_direofoffset &&
(np->n_flag & NMODIFIED) == 0) {
if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
if (NQNFS_CKCACHABLE(vp, NQL_READ)) {
nfsstats.direofcache_hits++;
return (0);
}
} else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 &&
np->n_mtime == vattr.va_mtime.ts_sec) {
nfsstats.direofcache_hits++;
return (0);
}
}
/*
* Call nfs_bioread() to do the real work.
*/
tresid = uio->uio_resid;
error = nfs_bioread(vp, uio, 0, ap->a_cred);
if (!error && uio->uio_resid == tresid)
nfsstats.direofcache_misses++;
return (error);
}
/*
* Readdir rpc call.
* Called from below the buffer cache by nfs_doio().
*/
int
nfs_readdirrpc(vp, uiop, cred)
register struct vnode *vp;
struct uio *uiop;
struct ucred *cred;
{
register long len;
register struct dirent *dp = 0;
register u_long *tl;
register caddr_t cp;
register long t1;
long tlen, lastlen = 0;
caddr_t bpos, dpos, cp2;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct mbuf *md2;
caddr_t dpos2;
int siz;
int more_dirs = 1;
u_long off, savoff = 0;
struct dirent *savdp = 0;
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(vp, NFSPROC_READDIR,
NFSX_FH + 2 * NFSX_UNSIGNED);
nfsm_fhtom(vp);
nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED);
off = (u_long)uiop->uio_offset;
*tl++ = txdr_unsigned(off);
*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, cred);
siz = 0;
nfsm_dissect(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 */
#ifdef lint
dp = (struct dirent *)0;
#endif /* lint */
while (more_dirs && siz < uiop->uio_resid) {
savoff = off; /* Hold onto offset and dp */
savdp = dp;
nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
dp = (struct dirent *)tl;
dp->d_fileno = 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_char)len;
dp->d_type = DT_UNKNOWN;
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_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
off = fxdr_unsigned(u_long, *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_dissect(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_t)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 dirent *)
(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);
}
/*
* Nqnfs readdir_and_lookup RPC. Used in place of nfs_readdirrpc().
*/
int
nfs_readdirlookrpc(vp, uiop, cred)
struct vnode *vp;
register struct uio *uiop;
struct ucred *cred;
{
register int len;
register struct dirent *dp = 0;
register u_long *tl;
register caddr_t cp;
register long t1;
caddr_t bpos, dpos, cp2;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct nameidata nami, *ndp = &nami;
struct componentname *cnp = &ndp->ni_cnd;
u_long off, endoff = 0, fileno;
time_t reqtime, ltime = 0;
struct nfsmount *nmp;
struct nfsnode *np;
struct vnode *newvp;
nfsv2fh_t *fhp;
u_quad_t frev;
int error = 0, tlen, more_dirs = 1, tresid, doit, bigenough, i;
int cachable = 0;
if (uiop->uio_iovcnt != 1)
panic("nfs rdirlook");
nmp = VFSTONFS(vp->v_mount);
tresid = uiop->uio_resid;
ndp->ni_dvp = vp;
newvp = NULLVP;
/*
* 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[NQNFSPROC_READDIRLOOK]++;
nfsm_reqhead(vp, NQNFSPROC_READDIRLOOK,
NFSX_FH + 3 * NFSX_UNSIGNED);
nfsm_fhtom(vp);
nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED);
off = (u_long)uiop->uio_offset;
*tl++ = txdr_unsigned(off);
*tl++ = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ?
nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1));
if (nmp->nm_flag & NFSMNT_NQLOOKLEASE)
*tl = txdr_unsigned(nmp->nm_leaseterm);
else
*tl = 0;
reqtime = time.tv_sec;
nfsm_request(vp, NQNFSPROC_READDIRLOOK, uiop->uio_procp, cred);
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
more_dirs = fxdr_unsigned(int, *tl);
/* loop thru the dir entries, doctoring them to 4bsd form */
bigenough = 1;
while (more_dirs && bigenough) {
doit = 1;
nfsm_dissect(tl, u_long *, 4 * NFSX_UNSIGNED);
if (nmp->nm_flag & NFSMNT_NQLOOKLEASE) {
cachable = fxdr_unsigned(int, *tl++);
ltime = reqtime + fxdr_unsigned(int, *tl++);
fxdr_hyper(tl, &frev);
}
nfsm_dissect(fhp, nfsv2fh_t *, NFSX_FH);
if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
VREF(vp);
newvp = vp;
np = VTONFS(vp);
} else {
error = nfs_nget(vp->v_mount, fhp, &np);
if (error)
doit = 0;
newvp = NFSTOV(np);
}
error = nfs_loadattrcache(&newvp, &md, &dpos,
(struct vattr *)0);
if (error)
doit = 0;
nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
fileno = fxdr_unsigned(u_long, *tl++);
len = fxdr_unsigned(int, *tl);
if (len <= 0 || len > NFS_MAXNAMLEN) {
error = EBADRPC;
m_freem(mrep);
goto nfsmout;
}
tlen = (len + 4) & ~0x3;
if ((tlen + DIRHDSIZ) > uiop->uio_resid)
bigenough = 0;
if (bigenough && doit) {
dp = (struct dirent *)uiop->uio_iov->iov_base;
dp->d_fileno = fileno;
dp->d_namlen = len;
dp->d_reclen = tlen + DIRHDSIZ;
dp->d_type =
IFTODT(VTTOIF(np->n_vattr.va_type));
uiop->uio_resid -= DIRHDSIZ;
uiop->uio_iov->iov_base += DIRHDSIZ;
uiop->uio_iov->iov_len -= DIRHDSIZ;
cnp->cn_nameptr = uiop->uio_iov->iov_base;
cnp->cn_namelen = len;
ndp->ni_vp = newvp;
nfsm_mtouio(uiop, len);
cp = uiop->uio_iov->iov_base;
tlen -= len;
for (i = 0; i < tlen; i++)
*cp++ = '\0';
uiop->uio_iov->iov_base += tlen;
uiop->uio_iov->iov_len -= tlen;
uiop->uio_resid -= tlen;
cnp->cn_hash = 0;
for (cp = cnp->cn_nameptr, i = 1; i <= len; i++, cp++)
cnp->cn_hash += (unsigned char)*cp * i;
if ((nmp->nm_flag & NFSMNT_NQLOOKLEASE) &&
ltime > time.tv_sec)
nqnfs_clientlease(nmp, np, NQL_READ,
cachable, ltime, frev);
if (cnp->cn_namelen <= NCHNAMLEN)
cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp);
} else {
nfsm_adv(nfsm_rndup(len));
}
if (newvp != NULLVP) {
vrele(newvp);
newvp = NULLVP;
}
nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
if (bigenough)
endoff = off = fxdr_unsigned(u_long, *tl++);
else
endoff = fxdr_unsigned(u_long, *tl++);
more_dirs = fxdr_unsigned(int, *tl);
}
/*
* If at end of rpc data, get the eof boolean
*/
if (!more_dirs) {
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
more_dirs = (fxdr_unsigned(int, *tl) == 0);
/*
* If at EOF, cache directory offset
*/
if (!more_dirs)
VTONFS(vp)->n_direofoffset = endoff;
}
if (uiop->uio_resid < tresid)
uiop->uio_offset = (off_t)off;
else
more_dirs = 0;
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->d_reclen += len;
uiop->uio_iov->iov_base += len;
uiop->uio_iov->iov_len -= len;
uiop->uio_resid -= len;
}
}
nfsmout:
if (newvp != NULLVP)
vrele(newvp);
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...
*/
int
nfs_sillyrename(dvp, vp, cnp)
struct vnode *dvp, *vp;
struct componentname *cnp;
{
register struct nfsnode *np;
register struct sillyrename *sp;
int error;
short pid;
cache_purge(dvp);
np = VTONFS(vp);
#ifdef SILLYSEPARATE
MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
M_NFSREQ, M_WAITOK);
#else
sp = &np->n_silly;
#endif
sp->s_cred = crdup(cnp->cn_cred);
sp->s_dvp = dvp;
VREF(dvp);
/* Fudge together a funny name */
pid = cnp->cn_proc->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, cnp->cn_proc) == 0) {
sp->s_name[4]++;
if (sp->s_name[4] > 'z') {
error = EINVAL;
goto bad;
}
}
error = nfs_renameit(dvp, cnp, sp);
if (error)
goto bad;
nfs_lookitup(sp, &np->n_fh, cnp->cn_proc);
np->n_sillyrename = sp;
return (0);
bad:
vrele(sp->s_dvp);
crfree(sp->s_cred);
#ifdef SILLYSEPARATE
free((caddr_t)sp, M_NFSREQ);
#endif
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
*/
int
nfs_lookitup(sp, fhp, procp)
register struct sillyrename *sp;
nfsv2fh_t *fhp;
struct proc *procp;
{
register struct vnode *vp = sp->s_dvp;
register u_long *tl;
register caddr_t cp;
register long t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, isnq;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
long len;
isnq = (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS);
nfsstats.rpccnt[NFSPROC_LOOKUP]++;
len = sp->s_namlen;
nfsm_reqhead(vp, NFSPROC_LOOKUP, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
if (isnq) {
nfsm_build(tl, u_long *, NFSX_UNSIGNED);
*tl = 0;
}
nfsm_fhtom(vp);
nfsm_strtom(sp->s_name, len, NFS_MAXNAMLEN);
nfsm_request(vp, NFSPROC_LOOKUP, procp, sp->s_cred);
if (fhp != NULL) {
if (isnq)
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
nfsm_dissect(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).
*/
int
nfs_bmap(ap)
struct vop_bmap_args /* {
struct vnode *a_vp;
daddr_t a_bn;
struct vnode **a_vpp;
daddr_t *a_bnp;
int *a_runp;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
if (ap->a_vpp != NULL)
*ap->a_vpp = vp;
if (ap->a_bnp != NULL)
*ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize);
if (ap->a_runp != NULL)
*ap->a_runp = 0;
return (0);
}
/*
* Strategy routine.
* For async requests when nfsiod(s) are running, queue the request by
* calling nfs_asyncio(), otherwise just all nfs_doio() to do the
* request.
*/
int
nfs_strategy(ap)
struct vop_strategy_args *ap;
{
register struct buf *bp = ap->a_bp;
struct ucred *cr;
struct proc *p;
int error = 0;
if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC))
panic("nfs physio/async");
if (bp->b_flags & B_ASYNC)
p = (struct proc *)0;
else
p = curproc; /* XXX */
if (bp->b_flags & B_READ)
cr = bp->b_rcred;
else
cr = bp->b_wcred;
/*
* 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_asyncio(bp, NOCRED))
error = nfs_doio(bp, cr, p);
return (error);
}
/*
* Mmap a file
*
* NB Currently unsupported.
*/
/* ARGSUSED */
int
nfs_mmap(ap)
struct vop_mmap_args /* {
struct vnode *a_vp;
int a_fflags;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
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 */
int
nfs_fsync(ap)
struct vop_fsync_args /* {
struct vnodeop_desc *a_desc;
struct vnode * a_vp;
struct ucred * a_cred;
int a_waitfor;
struct proc * a_p;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
register struct buf *bp;
struct buf *nbp;
struct nfsmount *nmp;
int s, error = 0, slptimeo = 0, slpflag = 0;
nmp = VFSTONFS(vp->v_mount);
if (nmp->nm_flag & NFSMNT_INT)
slpflag = PCATCH;
loop:
s = splbio();
for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
nbp = bp->b_vnbufs.le_next;
if (bp->b_flags & B_BUSY) {
if (ap->a_waitfor != MNT_WAIT)
continue;
bp->b_flags |= B_WANTED;
error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1),
"nfsfsync", slptimeo);
splx(s);
if (error) {
if (nfs_sigintr(nmp, (struct nfsreq *)0, ap->a_p))
return (EINTR);
if (slpflag == PCATCH) {
slpflag = 0;
slptimeo = 2 * hz;
}
}
goto loop;
}
if ((bp->b_flags & B_DELWRI) == 0)
panic("nfs_fsync: not dirty");
bremfree(bp);
bp->b_flags |= B_BUSY;
splx(s);
bp->b_flags |= B_ASYNC;
VOP_BWRITE(bp);
goto loop;
}
splx(s);
if (ap->a_waitfor == MNT_WAIT) {
while (vp->v_numoutput) {
vp->v_flag |= VBWAIT;
error = tsleep((caddr_t)&vp->v_numoutput,
slpflag | (PRIBIO + 1), "nfsfsync", slptimeo);
if (error) {
if (nfs_sigintr(nmp, (struct nfsreq *)0, ap->a_p))
return (EINTR);
if (slpflag == PCATCH) {
slpflag = 0;
slptimeo = 2 * hz;
}
}
}
if (vp->v_dirtyblkhd.lh_first) {
#ifdef DIAGNOSTIC
vprint("nfs_fsync: dirty", vp);
#endif
goto loop;
}
}
if (np->n_flag & NWRITEERR) {
error = np->n_error;
np->n_flag &= ~NWRITEERR;
}
return (error);
}
/*
* Return POSIX pathconf information applicable to nfs.
*
* Currently the NFS protocol does not support getting such
* information from the remote server.
*/
/* ARGSUSED */
int
nfs_pathconf(ap)
struct vop_pathconf_args /* {
struct vnode *a_vp;
int a_name;
int *a_retval;
} */ *ap;
{
return (EINVAL);
}
/*
* NFS advisory byte-level locks.
* Currently unsupported.
*/
int
nfs_advlock(ap)
struct vop_advlock_args /* {
struct vnode *a_vp;
caddr_t a_id;
int a_op;
struct flock *a_fl;
int a_flags;
} */ *ap;
{
register struct nfsnode *np = VTONFS(ap->a_vp);
/*
* The following kludge is to allow diskless support to work
* until a real NFS lockd is implemented. Basically, just pretend
* that this is a local lock.
*/
return (lf_advlock(ap, &(np->n_lockf), np->n_size));
}
/*
* Print out the contents of an nfsnode.
*/
int
nfs_print(ap)
struct vop_print_args /* {
struct vnode *a_vp;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
printf("tag VT_NFS, fileid %ld fsid 0x%lx",
np->n_vattr.va_fileid, np->n_vattr.va_fsid);
if (vp->v_type == VFIFO)
fifo_printinfo(vp);
printf("\n");
return (0);
}
/*
* NFS directory offset lookup.
* Currently unsupported.
*/
int
nfs_blkatoff(ap)
struct vop_blkatoff_args /* {
struct vnode *a_vp;
off_t a_offset;
char **a_res;
struct buf **a_bpp;
} */ *ap;
{
return (EOPNOTSUPP);
}
/*
* NFS flat namespace allocation.
* Currently unsupported.
*/
int
nfs_valloc(ap)
struct vop_valloc_args /* {
struct vnode *a_pvp;
int a_mode;
struct ucred *a_cred;
struct vnode **a_vpp;
} */ *ap;
{
return (EOPNOTSUPP);
}
/*
* NFS flat namespace free.
* Currently unsupported.
*/
int
nfs_vfree(ap)
struct vop_vfree_args /* {
struct vnode *a_pvp;
ino_t a_ino;
int a_mode;
} */ *ap;
{
return (EOPNOTSUPP);
}
/*
* NFS file truncation.
*/
int
nfs_truncate(ap)
struct vop_truncate_args /* {
struct vnode *a_vp;
off_t a_length;
int a_flags;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
/* Use nfs_setattr */
printf("nfs_truncate: need to implement!!");
return (EOPNOTSUPP);
}
/*
* NFS update.
*/
int
nfs_update(ap)
struct vop_update_args /* {
struct vnode *a_vp;
struct timeval *a_ta;
struct timeval *a_tm;
int a_waitfor;
} */ *ap;
{
#if 0
/* Use nfs_setattr */
printf("nfs_update: need to implement!!");
#endif
return (EOPNOTSUPP);
}
/*
* nfs special file access vnode op.
* Essentially just get vattr and then imitate iaccess() since the device is
* local to the client.
*/
int
nfsspec_access(ap)
struct vop_access_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
register struct vattr *vap;
register gid_t *gp;
register struct ucred *cred = ap->a_cred;
mode_t mode = ap->a_mode;
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;
error = VOP_GETATTR(ap->a_vp, vap, cred, ap->a_p);
if (error)
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:
;
}
return ((vap->va_mode & mode) == mode ? 0 : EACCES);
}
/*
* Read wrapper for special devices.
*/
int
nfsspec_read(ap)
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
register struct nfsnode *np = VTONFS(ap->a_vp);
/*
* Set access flag.
*/
np->n_flag |= NACC;
np->n_atim = time;
return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap));
}
/*
* Write wrapper for special devices.
*/
int
nfsspec_write(ap)
struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
register struct nfsnode *np = VTONFS(ap->a_vp);
/*
* Set update flag.
*/
np->n_flag |= NUPD;
np->n_mtim = time;
return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap));
}
/*
* Close wrapper for special devices.
*
* Update the times on the nfsnode then do device close.
*/
int
nfsspec_close(ap)
struct vop_close_args /* {
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
struct vattr vattr;
if (np->n_flag & (NACC | NUPD)) {
np->n_flag |= NCHG;
if (vp->v_usecount == 1 &&
(vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
VATTR_NULL(&vattr);
if (np->n_flag & NACC) {
vattr.va_atime.ts_sec = np->n_atim.tv_sec;
vattr.va_atime.ts_nsec =
np->n_atim.tv_usec * 1000;
}
if (np->n_flag & NUPD) {
vattr.va_mtime.ts_sec = np->n_mtim.tv_sec;
vattr.va_mtime.ts_nsec =
np->n_mtim.tv_usec * 1000;
}
(void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p);
}
}
return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap));
}
/*
* Read wrapper for fifos.
*/
int
nfsfifo_read(ap)
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
extern int (**fifo_vnodeop_p)();
register struct nfsnode *np = VTONFS(ap->a_vp);
/*
* Set access flag.
*/
np->n_flag |= NACC;
np->n_atim = time;
return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap));
}
/*
* Write wrapper for fifos.
*/
int
nfsfifo_write(ap)
struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
extern int (**fifo_vnodeop_p)();
register struct nfsnode *np = VTONFS(ap->a_vp);
/*
* Set update flag.
*/
np->n_flag |= NUPD;
np->n_mtim = time;
return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap));
}
/*
* Close wrapper for fifos.
*
* Update the times on the nfsnode then do fifo close.
*/
int
nfsfifo_close(ap)
struct vop_close_args /* {
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
struct vattr vattr;
extern int (**fifo_vnodeop_p)();
if (np->n_flag & (NACC | NUPD)) {
if (np->n_flag & NACC)
np->n_atim = time;
if (np->n_flag & NUPD)
np->n_mtim = time;
np->n_flag |= NCHG;
if (vp->v_usecount == 1 &&
(vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
VATTR_NULL(&vattr);
if (np->n_flag & NACC) {
vattr.va_atime.ts_sec = np->n_atim.tv_sec;
vattr.va_atime.ts_nsec =
np->n_atim.tv_usec * 1000;
}
if (np->n_flag & NUPD) {
vattr.va_mtime.ts_sec = np->n_mtim.tv_sec;
vattr.va_mtime.ts_nsec =
np->n_mtim.tv_usec * 1000;
}
(void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p);
}
}
return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap));
}
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