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nfs_vnops.c
2590 lines (2465 loc) · 66.3 KB
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nfs_vnops.c
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/* $NetBSD: nfs_vnops.c,v 1.35.2.4 1994/10/06 05:10:34 mycroft Exp $ */
/*
* 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
*/
/*
* 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/map.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 };
/*
* 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 };
#ifdef FIFO
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 };
#endif /* FIFO */
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);
if (vp->v_flag & VTEXT) {
/*
* 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);
(void) vnode_pager_uncache(vp);
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);
(void) vnode_pager_uncache(vp);
np->n_attrstamp = 0;
np->n_direofoffset = 0;
if (error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p))
return (error);
np->n_mtime = vattr.va_mtime.ts_sec;
} else {
if (error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p))
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);
(void) vnode_pager_uncache(vp);
np->n_mtime = vattr.va_mtime.ts_sec;
}
}
}
} else 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;
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) {
if (vap->va_size == 0)
error = nfs_vinvalbuf(vp, 0,
ap->a_cred, ap->a_p, 1);
else
error = nfs_vinvalbuf(vp, V_SAVE,
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;
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, cachable;
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);
}
if (error = nfs_nget(dvp->v_mount, fhp, &np)) {
m_freem(mrep);
return (error);
}
newvp = NFSTOV(np);
if (error =
nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) {
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 {
if (error = nfs_nget(dvp->v_mount, fhp, &np)) {
m_freem(mrep);
return (error);
}
newvp = NFSTOV(np);
}
if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) {
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;
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);
#ifdef FIFO
else if (vap->va_type == VFIFO)
rdev = 0xffffffff;
#endif /* FIFO */
else {
VOP_ABORTOP(dvp, cnp);
vput(dvp);
return (EOPNOTSUPP);
}
if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) {
VOP_ABORTOP(dvp, cnp);
vput(dvp);
return (error);
}
newvp = NULLVP;
nfsstats.rpccnt[NFSPROC_CREATE]++;