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NetBSD/sys/nfs/nfs_vnops.c
jdolecek e0cc03a09b merge kqueue branch into -current 
kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe
2002-10-23 09:10:23 +00:00

3350 lines
84 KiB
C
Raw Blame History

/* $NetBSD: nfs_vnops.c,v 1.156 2002/10/23 09:14:51 jdolecek 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 8.19 (Berkeley) 7/31/95
*/
/*
* vnode op calls for Sun NFS version 2 and 3
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.156 2002/10/23 09:14:51 jdolecek Exp $");
#include "opt_nfs.h"
#include "opt_uvmhist.h"
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/resourcevar.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/dirent.h>
#include <sys/fcntl.h>
#include <sys/hash.h>
#include <sys/lockf.h>
#include <sys/stat.h>
#include <sys/unistd.h>
#include <uvm/uvm_extern.h>
#include <uvm/uvm.h>
#include <miscfs/fifofs/fifo.h>
#include <miscfs/genfs/genfs.h>
#include <miscfs/specfs/specdev.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.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>
#include <nfs/nfs_var.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
/* Defs */
#define TRUE 1
#define FALSE 0
/*
* Global vfs data structures for nfs
*/
int (**nfsv2_vnodeop_p) __P((void *));
const 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_lease_desc, nfs_lease_check }, /* lease */
{ &vop_fcntl_desc, genfs_fcntl }, /* fcntl */
{ &vop_ioctl_desc, nfs_ioctl }, /* ioctl */
{ &vop_poll_desc, nfs_poll }, /* poll */
{ &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */
{ &vop_revoke_desc, nfs_revoke }, /* revoke */
{ &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, nfs_bwrite }, /* bwrite */
{ &vop_getpages_desc, nfs_getpages }, /* getpages */
{ &vop_putpages_desc, genfs_putpages }, /* putpages */
{ NULL, NULL }
};
const struct vnodeopv_desc nfsv2_vnodeop_opv_desc =
{ &nfsv2_vnodeop_p, nfsv2_vnodeop_entries };
/*
* Special device vnode ops
*/
int (**spec_nfsv2nodeop_p) __P((void *));
const 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_lease_desc, spec_lease_check }, /* lease */
{ &vop_fcntl_desc, genfs_fcntl }, /* fcntl */
{ &vop_ioctl_desc, spec_ioctl }, /* ioctl */
{ &vop_poll_desc, spec_poll }, /* poll */
{ &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */
{ &vop_revoke_desc, spec_revoke }, /* revoke */
{ &vop_mmap_desc, spec_mmap }, /* mmap */
{ &vop_fsync_desc, spec_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 }, /* bwrite */
{ &vop_getpages_desc, spec_getpages }, /* getpages */
{ &vop_putpages_desc, spec_putpages }, /* putpages */
{ NULL, NULL }
};
const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc =
{ &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries };
int (**fifo_nfsv2nodeop_p) __P((void *));
const 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_lease_desc, fifo_lease_check }, /* lease */
{ &vop_fcntl_desc, genfs_fcntl }, /* fcntl */
{ &vop_ioctl_desc, fifo_ioctl }, /* ioctl */
{ &vop_poll_desc, fifo_poll }, /* poll */
{ &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */
{ &vop_revoke_desc, fifo_revoke }, /* revoke */
{ &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, genfs_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 }, /* bwrite */
{ &vop_putpages_desc, fifo_putpages }, /* putpages */
{ NULL, NULL }
};
const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc =
{ &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries };
/*
* Global variables
*/
extern u_int32_t nfs_true, nfs_false;
extern u_int32_t nfs_xdrneg1;
extern nfstype nfsv3_type[9];
struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
struct nfsmount *nfs_iodmount[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 version 2, just return ok. File accesses may fail later.
* For nfs version 3, use the access rpc to check accessibility. If file modes
* are changed on the server, accesses might still fail later.
*/
int
nfs_access(v)
void *v;
{
struct vop_access_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, attrflag, cachevalid;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
u_int32_t mode, rmode;
const int v3 = NFS_ISV3(vp);
struct nfsnode *np = VTONFS(vp);
cachevalid = (np->n_accstamp != -1 &&
(time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) &&
np->n_accuid == ap->a_cred->cr_uid);
/*
* Check access cache first. If this request has been made for this
* uid shortly before, use the cached result.
*/
if (cachevalid) {
if (!np->n_accerror) {
if ((np->n_accmode & ap->a_mode) == ap->a_mode)
return np->n_accerror;
} else if ((np->n_accmode & ap->a_mode) == np->n_accmode)
return np->n_accerror;
}
/*
* For nfs v3, 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 (v3) {
nfsstats.rpccnt[NFSPROC_ACCESS]++;
nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
nfsm_fhtom(vp, v3);
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
if (ap->a_mode & VREAD)
mode = NFSV3ACCESS_READ;
else
mode = 0;
if (vp->v_type != VDIR) {
if (ap->a_mode & VWRITE)
mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
if (ap->a_mode & VEXEC)
mode |= NFSV3ACCESS_EXECUTE;
} else {
if (ap->a_mode & VWRITE)
mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
NFSV3ACCESS_DELETE);
if (ap->a_mode & VEXEC)
mode |= NFSV3ACCESS_LOOKUP;
}
*tl = txdr_unsigned(mode);
nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred);
nfsm_postop_attr(vp, attrflag, 0);
if (!error) {
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
rmode = fxdr_unsigned(u_int32_t, *tl);
/*
* The NFS V3 spec does not clarify whether or not
* the returned access bits can be a superset of
* the ones requested, so...
*/
if ((rmode & mode) != mode)
error = EACCES;
}
nfsm_reqdone;
} else
return (nfsspec_access(ap));
/*
* Disallow write attempts on filesystems mounted read-only;
* unless the file is a socket, fifo, or a block or character
* device resident on the filesystem.
*/
if (!error && (ap->a_mode & VWRITE) &&
(vp->v_mount->mnt_flag & MNT_RDONLY)) {
switch (vp->v_type) {
case VREG:
case VDIR:
case VLNK:
error = EROFS;
default:
break;
}
}
if (!error || error == EACCES) {
/*
* If we got the same result as for a previous,
* different request, OR it in. Don't update
* the timestamp in that case.
*/
if (cachevalid && np->n_accstamp != -1 &&
error == np->n_accerror) {
if (!error)
np->n_accmode |= ap->a_mode;
else if ((np->n_accmode & ap->a_mode) == ap->a_mode)
np->n_accmode = ap->a_mode;
} else {
np->n_accstamp = time.tv_sec;
np->n_accuid = ap->a_cred->cr_uid;
np->n_accmode = ap->a_mode;
np->n_accerror = error;
}
}
return (error);
}
/*
* 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(v)
void *v;
{
struct vop_open_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap = v;
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);
}
/*
* Initialize read and write creds here, for swapfiles
* and other paths that don't set the creds themselves.
*/
if (ap->a_mode & FREAD) {
if (np->n_rcred) {
crfree(np->n_rcred);
}
np->n_rcred = ap->a_cred;
crhold(np->n_rcred);
}
if (ap->a_mode & FWRITE) {
if (np->n_wcred) {
crfree(np->n_wcred);
}
np->n_wcred = ap->a_cred;
crhold(np->n_wcred);
}
#ifndef NFS_V2_ONLY
/*
* Get a valid lease. If cached data is stale, flush it.
*/
if (nmp->nm_flag & NFSMNT_NQNFS) {
if (NQNFS_CKINVALID(vp, np, ND_READ)) {
do {
error = nqnfs_getlease(vp, ND_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
#endif
{
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;
if (vp->v_type == VDIR) {
nfs_invaldircache(vp, 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.tv_sec;
} else {
error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p);
if (error)
return (error);
if (np->n_mtime != vattr.va_mtime.tv_sec) {
if (vp->v_type == VDIR) {
nfs_invaldircache(vp, 0);
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.tv_sec;
}
}
}
if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
np->n_attrstamp = 0; /* For Open/Close consistency */
return (0);
}
/*
* nfs close vnode op
* What an NFS client should do upon close after writing is a debatable issue.
* Most NFS clients push delayed writes to the server upon close, basically for
* two reasons:
* 1 - So that any write errors may be reported back to the client process
* doing the close system call. By far the two most likely errors are
* NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
* 2 - To put a worst case upper bound on cache inconsistency between
* multiple clients for the file.
* There is also a consistency problem for Version 2 of the protocol w.r.t.
* not being able to tell if other clients are writing a file concurrently,
* since there is no way of knowing if the changed modify time in the reply
* is only due to the write for this client.
* (NFS Version 3 provides weak cache consistency data in the reply that
* should be sufficient to detect and handle this case.)
*
* The current code does the following:
* for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
* for NFS Version 3 - flush dirty buffers to the server but don't invalidate
* or commit them (this satisfies 1 and 2 except for the
* case where the server crashes after this close but
* before the commit RPC, which is felt to be "good
* enough". Changing the last argument to nfs_flush() to
* a 1 would force a commit operation, if it is felt a
* commit is necessary now.
* for NQNFS - do nothing now, since 2 is dealt with via leases and
* 1 should be dealt with via an fsync() system call for
* cases where write errors are important.
*/
/* ARGSUSED */
int
nfs_close(v)
void *v;
{
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 = v;
struct vnode *vp = ap->a_vp;
struct nfsnode *np = VTONFS(vp);
int error = 0;
UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist);
if (vp->v_type == VREG) {
if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 &&
(np->n_flag & NMODIFIED)) {
if (NFS_ISV3(vp)) {
error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0);
np->n_flag &= ~NMODIFIED;
} else
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;
}
}
UVMHIST_LOG(ubchist, "returning %d", error,0,0,0);
return (error);
}
/*
* nfs getattr call from vfs.
*/
int
nfs_getattr(v)
void *v;
{
struct vop_getattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct nfsnode *np = VTONFS(vp);
caddr_t cp;
u_int32_t *tl;
int32_t t1, t2;
caddr_t bpos, dpos;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
const int v3 = NFS_ISV3(vp);
/*
* 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(v3));
nfsm_fhtom(vp, v3);
nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred);
if (!error) {
nfsm_loadattr(vp, ap->a_vap, 0);
if (vp->v_type == VDIR &&
ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ)
ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ;
}
nfsm_reqdone;
return (error);
}
/*
* nfs setattr call.
*/
int
nfs_setattr(v)
void *v;
{
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 = v;
struct vnode *vp = ap->a_vp;
struct nfsnode *np = VTONFS(vp);
struct vattr *vap = ap->a_vap;
int error = 0;
u_quad_t tsize = 0;
/*
* Setting of flags is not supported.
*/
if (vap->va_flags != VNOVAL)
return (EOPNOTSUPP);
/*
* Disallow write attempts if the filesystem is mounted read-only.
*/
if ((vap->va_uid != (uid_t)VNOVAL ||
vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
(vp->v_mount->mnt_flag & MNT_RDONLY))
return (EROFS);
if (vap->va_size != VNOVAL) {
switch (vp->v_type) {
case VDIR:
return (EISDIR);
case VCHR:
case VBLK:
case VSOCK:
case VFIFO:
if (vap->va_mtime.tv_sec == VNOVAL &&
vap->va_atime.tv_sec == VNOVAL &&
vap->va_mode == (mode_t)VNOVAL &&
vap->va_uid == (uid_t)VNOVAL &&
vap->va_gid == (gid_t)VNOVAL)
return (0);
vap->va_size = VNOVAL;
break;
default:
/*
* Disallow write attempts if the filesystem is
* mounted read-only.
*/
if (vp->v_mount->mnt_flag & MNT_RDONLY)
return (EROFS);
uvm_vnp_setsize(vp, vap->va_size);
tsize = np->n_size;
np->n_size = vap->va_size;
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) {
uvm_vnp_setsize(vp, tsize);
return (error);
}
np->n_vattr->va_size = vap->va_size;
}
} else if ((vap->va_mtime.tv_sec != VNOVAL ||
vap->va_atime.tv_sec != VNOVAL) &&
vp->v_type == VREG &&
(error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
ap->a_p, 1)) == EINTR)
return (error);
error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p);
if (error && vap->va_size != VNOVAL) {
np->n_size = np->n_vattr->va_size = tsize;
uvm_vnp_setsize(vp, np->n_size);
}
VN_KNOTE(vp, NOTE_ATTRIB);
return (error);
}
/*
* Do an nfs setattr rpc.
*/
int
nfs_setattrrpc(vp, vap, cred, procp)
struct vnode *vp;
struct vattr *vap;
struct ucred *cred;
struct proc *procp;
{
struct nfsv2_sattr *sp;
caddr_t cp;
int32_t t1, t2;
caddr_t bpos, dpos, cp2;
u_int32_t *tl;
int error = 0, wccflag = NFSV3_WCCRATTR;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
const int v3 = NFS_ISV3(vp);
nfsstats.rpccnt[NFSPROC_SETATTR]++;
nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
nfsm_fhtom(vp, v3);
if (v3) {
nfsm_v3attrbuild(vap, TRUE);
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = nfs_false;
} else {
nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
if (vap->va_mode == (mode_t)VNOVAL)
sp->sa_mode = nfs_xdrneg1;
else
sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
if (vap->va_uid == (uid_t)VNOVAL)
sp->sa_uid = nfs_xdrneg1;
else
sp->sa_uid = txdr_unsigned(vap->va_uid);
if (vap->va_gid == (gid_t)VNOVAL)
sp->sa_gid = nfs_xdrneg1;
else
sp->sa_gid = txdr_unsigned(vap->va_gid);
sp->sa_size = txdr_unsigned(vap->va_size);
txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
}
nfsm_request(vp, NFSPROC_SETATTR, procp, cred);
if (v3) {
nfsm_wcc_data(vp, wccflag, 0);
} else
nfsm_loadattr(vp, (struct vattr *)0, 0);
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
*
* This code is full of lock/unlock statements and checks, because
* we continue after cache_lookup has finished (we need to check
* with the attr cache and do an rpc if it has timed out). This means
* that the locking effects of cache_lookup have to be taken into
* account.
*/
int
nfs_lookup(v)
void *v;
{
struct vop_lookup_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
} */ *ap = v;
struct componentname *cnp = ap->a_cnp;
struct vnode *dvp = ap->a_dvp;
struct vnode **vpp = ap->a_vpp;
int flags;
struct vnode *newvp;
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
caddr_t bpos, dpos, cp2;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
long len;
nfsfh_t *fhp;
struct nfsnode *np;
int lockparent, wantparent, error = 0, attrflag, fhsize;
const int v3 = NFS_ISV3(dvp);
cnp->cn_flags &= ~PDIRUNLOCK;
flags = cnp->cn_flags;
*vpp = NULLVP;
newvp = NULLVP;
if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
(cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
return (EROFS);
if (dvp->v_type != VDIR)
return (ENOTDIR);
lockparent = flags & LOCKPARENT;
wantparent = flags & (LOCKPARENT|WANTPARENT);
np = VTONFS(dvp);
/*
* Before tediously performing a linear scan of the directory,
* check the name cache to see if the directory/name pair
* we are looking for is known already.
* If the directory/name pair is found in the name cache,
* we have to ensure the directory has not changed from
* the time the cache entry has been created. If it has,
* the cache entry has to be ignored
*/
if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) {
struct vattr vattr;
int err2;
if (error && error != ENOENT) {
*vpp = NULLVP;
return error;
}
if (cnp->cn_flags & PDIRUNLOCK) {
err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
if (err2 != 0) {
*vpp = NULLVP;
return err2;
}
cnp->cn_flags &= ~PDIRUNLOCK;
}
err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc);
if (err2 != 0) {
if (error == 0) {
if (*vpp != dvp)
vput(*vpp);
else
vrele(*vpp);
}
*vpp = NULLVP;
return err2;
}
if (error == ENOENT) {
if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred,
cnp->cn_proc) && vattr.va_mtime.tv_sec ==
VTONFS(dvp)->n_nctime)
return ENOENT;
cache_purge(dvp);
np->n_nctime = 0;
goto dorpc;
}
newvp = *vpp;
if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc)
&& vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime)
{
nfsstats.lookupcache_hits++;
if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
cnp->cn_flags |= SAVENAME;
if ((!lockparent || !(flags & ISLASTCN)) &&
newvp != dvp)
VOP_UNLOCK(dvp, 0);
return (0);
}
cache_purge(newvp);
if (newvp != dvp)
vput(newvp);
else
vrele(newvp);
*vpp = NULLVP;
}
dorpc:
error = 0;
newvp = NULLVP;
nfsstats.lookupcache_misses++;
nfsstats.rpccnt[NFSPROC_LOOKUP]++;
len = cnp->cn_namelen;
nfsm_reqhead(dvp, NFSPROC_LOOKUP,
NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
nfsm_fhtom(dvp, v3);
nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred);
if (error) {
nfsm_postop_attr(dvp, attrflag, 0);
m_freem(mrep);
goto nfsmout;
}
nfsm_getfh(fhp, fhsize, v3);
/*
* Handle RENAME case...
*/
if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) {
if (NFS_CMPFH(np, fhp, fhsize)) {
m_freem(mrep);
return (EISDIR);
}
error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
if (error) {
m_freem(mrep);
return error;
}
newvp = NFSTOV(np);
if (v3) {
nfsm_postop_attr(newvp, attrflag, 0);
nfsm_postop_attr(dvp, attrflag, 0);
} else
nfsm_loadattr(newvp, (struct vattr *)0, 0);
*vpp = newvp;
m_freem(mrep);
cnp->cn_flags |= SAVENAME;
if (!lockparent) {
VOP_UNLOCK(dvp, 0);
cnp->cn_flags |= PDIRUNLOCK;
}
return (0);
}
/*
* The postop attr handling is duplicated for each if case,
* because it should be done while dvp is locked (unlocking
* dvp is different for each case).
*/
if (NFS_CMPFH(np, fhp, fhsize)) {
/*
* "." lookup
*/
VREF(dvp);
newvp = dvp;
if (v3) {
nfsm_postop_attr(newvp, attrflag, 0);
nfsm_postop_attr(dvp, attrflag, 0);
} else
nfsm_loadattr(newvp, (struct vattr *)0, 0);
} else if (flags & ISDOTDOT) {
/*
* ".." lookup
*/
VOP_UNLOCK(dvp, 0);
cnp->cn_flags |= PDIRUNLOCK;
error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
if (error) {
if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0)
cnp->cn_flags &= ~PDIRUNLOCK;
m_freem(mrep);
return error;
}
newvp = NFSTOV(np);
if (v3) {
nfsm_postop_attr(newvp, attrflag, 0);
nfsm_postop_attr(dvp, attrflag, 0);
} else
nfsm_loadattr(newvp, (struct vattr *)0, 0);
if (lockparent && (flags & ISLASTCN)) {
if ((error = vn_lock(dvp, LK_EXCLUSIVE))) {
m_freem(mrep);
vput(newvp);
return error;
}
cnp->cn_flags &= ~PDIRUNLOCK;
}
} else {
/*
* Other lookups.
*/
error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
if (error) {
m_freem(mrep);
return error;
}
newvp = NFSTOV(np);
if (v3) {
nfsm_postop_attr(newvp, attrflag, 0);
nfsm_postop_attr(dvp, attrflag, 0);
} else
nfsm_loadattr(newvp, (struct vattr *)0, 0);
if (!lockparent || !(flags & ISLASTCN)) {
VOP_UNLOCK(dvp, 0);
cnp->cn_flags |= PDIRUNLOCK;
}
}
if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
cnp->cn_flags |= SAVENAME;
if ((cnp->cn_flags & MAKEENTRY) &&
(cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) {
np->n_ctime = np->n_vattr->va_ctime.tv_sec;
cache_enter(dvp, newvp, cnp);
}
*vpp = newvp;
nfsm_reqdone;
if (error) {
/*
* We get here only because of errors returned by
* the RPC. Otherwise we'll have returned above
* (the nfsm_* macros will jump to nfsm_reqdone
* on error).
*/
if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) &&
cnp->cn_nameiop != CREATE) {
if (VTONFS(dvp)->n_nctime == 0)
VTONFS(dvp)->n_nctime =
VTONFS(dvp)->n_vattr->va_mtime.tv_sec;
cache_enter(dvp, NULL, cnp);
}
if (newvp != NULLVP) {
vrele(newvp);
if (newvp != dvp)
VOP_UNLOCK(newvp, 0);
}
if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
(flags & ISLASTCN) && error == ENOENT) {
if (dvp->v_mount->mnt_flag & MNT_RDONLY)
error = EROFS;
else
error = EJUSTRETURN;
}
if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
cnp->cn_flags |= SAVENAME;
*vpp = NULL;
}
return error;
}
/*
* nfs read call.
* Just call nfs_bioread() to do the work.
*/
int
nfs_read(v)
void *v;
{
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap = v;
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, 0));
}
/*
* nfs readlink call
*/
int
nfs_readlink(v)
void *v;
{
struct vop_readlink_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
if (vp->v_type != VLNK)
return (EPERM);
return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0));
}
/*
* Do a readlink rpc.
* Called by nfs_doio() from below the buffer cache.
*/
int
nfs_readlinkrpc(vp, uiop, cred)
struct vnode *vp;
struct uio *uiop;
struct ucred *cred;
{
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, len, attrflag;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
const int v3 = NFS_ISV3(vp);
nfsstats.rpccnt[NFSPROC_READLINK]++;
nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
nfsm_fhtom(vp, v3);
nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred);
if (v3)
nfsm_postop_attr(vp, attrflag, 0);
if (!error) {
nfsm_strsiz(len, NFS_MAXPATHLEN);
nfsm_mtouio(uiop, len);
}
nfsm_reqdone;
return (error);
}
/*
* nfs read rpc call
* Ditto above
*/
int
nfs_readrpc(vp, uiop)
struct vnode *vp;
struct uio *uiop;
{
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
caddr_t bpos, dpos, cp2;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct nfsmount *nmp;
int error = 0, len, retlen, tsiz, eof, attrflag;
const int v3 = NFS_ISV3(vp);
#ifndef nolint
eof = 0;
#endif
nmp = VFSTONFS(vp->v_mount);
tsiz = uiop->uio_resid;
if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
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(v3) + NFSX_UNSIGNED * 3);
nfsm_fhtom(vp, v3);
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
if (v3) {
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,
VTONFS(vp)->n_rcred);
if (v3) {
nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC);
if (error) {
m_freem(mrep);
goto nfsmout;
}
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
eof = fxdr_unsigned(int, *(tl + 1));
} else
nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC);
nfsm_strsiz(retlen, nmp->nm_rsize);
nfsm_mtouio(uiop, retlen);
m_freem(mrep);
tsiz -= retlen;
if (v3) {
if (eof || retlen == 0)
tsiz = 0;
} else if (retlen < len)
tsiz = 0;
}
nfsmout:
return (error);
}
/*
* nfs write call
*/
int
nfs_writerpc(vp, uiop, iomode, must_commit)
struct vnode *vp;
struct uio *uiop;
int *iomode, *must_commit;
{
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2, backup;
caddr_t bpos, dpos, cp2;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
const int v3 = NFS_ISV3(vp);
int committed = NFSV3WRITE_FILESYNC;
if (vp->v_mount->mnt_flag & MNT_RDONLY) {
panic("writerpc readonly vp %p", vp);
}
#ifdef DIAGNOSTIC
if (uiop->uio_iovcnt != 1)
panic("nfs: writerpc iovcnt > 1");
#endif
*must_commit = 0;
tsiz = uiop->uio_resid;
if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
return (EFBIG);
while (tsiz > 0) {
nfsstats.rpccnt[NFSPROC_WRITE]++;
len = min(tsiz, nmp->nm_wsize);
nfsm_reqhead(vp, NFSPROC_WRITE,
NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
nfsm_fhtom(vp, v3);
if (v3) {
nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
txdr_hyper(uiop->uio_offset, tl);
tl += 2;
*tl++ = txdr_unsigned(len);
*tl++ = txdr_unsigned(*iomode);
*tl = txdr_unsigned(len);
} else {
u_int32_t x;
nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
/* Set both "begin" and "current" to non-garbage. */
x = txdr_unsigned((u_int32_t)uiop->uio_offset);
*tl++ = x; /* "begin offset" */
*tl++ = x; /* "current offset" */
x = txdr_unsigned(len);
*tl++ = x; /* total to this offset */
*tl = x; /* size of this write */
}
nfsm_uiotom(uiop, len);
nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp,
VTONFS(vp)->n_wcred);
if (v3) {
wccflag = NFSV3_WCCCHK;
nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC);
if (!error) {
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
+ NFSX_V3WRITEVERF);
rlen = fxdr_unsigned(int, *tl++);
if (rlen == 0) {
error = NFSERR_IO;
m_freem(mrep);
break;
} else if (rlen < len) {
backup = len - rlen;
uiop->uio_iov->iov_base =
(caddr_t)uiop->uio_iov->iov_base -
backup;
uiop->uio_iov->iov_len += backup;
uiop->uio_offset -= backup;
uiop->uio_resid += backup;
len = rlen;
}
commit = fxdr_unsigned(int, *tl++);
/*
* Return the lowest committment level
* obtained by any of the RPCs.
*/
if (committed == NFSV3WRITE_FILESYNC)
committed = commit;
else if (committed == NFSV3WRITE_DATASYNC &&
commit == NFSV3WRITE_UNSTABLE)
committed = commit;
if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){
memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl,
NFSX_V3WRITEVERF);
nmp->nm_iflag |= NFSMNT_HASWRITEVERF;
} else if (memcmp((caddr_t)tl,
(caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
*must_commit = 1;
memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl,
NFSX_V3WRITEVERF);
}
}
} else
nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC);
if (wccflag)
VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec;
m_freem(mrep);
if (error)
break;
tsiz -= len;
}
nfsmout:
*iomode = committed;
if (error)
uiop->uio_resid = tsiz;
return (error);
}
/*
* nfs mknod rpc
* For NFS v2 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.
*/
int
nfs_mknodrpc(dvp, vpp, cnp, vap)
struct vnode *dvp;
struct vnode **vpp;
struct componentname *cnp;
struct vattr *vap;
{
struct nfsv2_sattr *sp;
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
struct vnode *newvp = (struct vnode *)0;
struct nfsnode *np;
char *cp2;
caddr_t bpos, dpos;
int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
u_int32_t rdev;
const int v3 = NFS_ISV3(dvp);
if (vap->va_type == VCHR || vap->va_type == VBLK)
rdev = txdr_unsigned(vap->va_rdev);
else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
rdev = nfs_xdrneg1;
else {
VOP_ABORTOP(dvp, cnp);
vput(dvp);
return (EOPNOTSUPP);
}
nfsstats.rpccnt[NFSPROC_MKNOD]++;
nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
+ nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
nfsm_fhtom(dvp, v3);
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
if (v3) {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl++ = vtonfsv3_type(vap->va_type);
nfsm_v3attrbuild(vap, FALSE);
if (vap->va_type == VCHR || vap->va_type == VBLK) {
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
*tl++ = txdr_unsigned(major(vap->va_rdev));
*tl = txdr_unsigned(minor(vap->va_rdev));
}
} else {
nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
sp->sa_uid = nfs_xdrneg1;
sp->sa_gid = nfs_xdrneg1;
sp->sa_size = rdev;
txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
}
nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred);
if (!error) {
nfsm_mtofh(dvp, newvp, v3, gotvp);
if (!gotvp) {
error = nfs_lookitup(dvp, cnp->cn_nameptr,
cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np);
if (!error)
newvp = NFSTOV(np);
}
}
if (v3)
nfsm_wcc_data(dvp, wccflag, 0);
nfsm_reqdone;
if (error) {
if (newvp)
vput(newvp);
} else {
if (cnp->cn_flags & MAKEENTRY)
cache_enter(dvp, newvp, cnp);
*vpp = newvp;
}
PNBUF_PUT(cnp->cn_pnbuf);
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!wccflag)
VTONFS(dvp)->n_attrstamp = 0;
vput(dvp);
return (error);
}
/*
* nfs mknod vop
* just call nfs_mknodrpc() to do the work.
*/
/* ARGSUSED */
int
nfs_mknod(v)
void *v;
{
struct vop_mknod_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap = v;
int error;
error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
VN_KNOTE(ap->a_dvp, NOTE_WRITE);
return (error);
}
static u_long create_verf;
/*
* nfs file create call
*/
int
nfs_create(v)
void *v;
{
struct vop_create_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap = v;
struct vnode *dvp = ap->a_dvp;
struct vattr *vap = ap->a_vap;
struct componentname *cnp = ap->a_cnp;
struct nfsv2_sattr *sp;
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
struct nfsnode *np = (struct nfsnode *)0;
struct vnode *newvp = (struct vnode *)0;
caddr_t bpos, dpos, cp2;
int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
const int v3 = NFS_ISV3(dvp);
/*
* Oops, not for me..
*/
if (vap->va_type == VSOCK)
return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
#ifdef VA_EXCLUSIVE
if (vap->va_vaflags & VA_EXCLUSIVE)
fmode |= O_EXCL;
#endif
again:
error = 0;
nfsstats.rpccnt[NFSPROC_CREATE]++;
nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
nfsm_fhtom(dvp, v3);
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
if (v3) {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
if (fmode & O_EXCL) {
*tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
#ifdef INET
if (in_ifaddr.tqh_first)
*tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr;
else
*tl++ = create_verf;
#else
*tl++ = create_verf;
#endif
*tl = ++create_verf;
} else {
*tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
nfsm_v3attrbuild(vap, FALSE);
}
} else {
nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
sp->sa_uid = nfs_xdrneg1;
sp->sa_gid = nfs_xdrneg1;
sp->sa_size = 0;
txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
}
nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred);
if (!error) {
nfsm_mtofh(dvp, newvp, v3, gotvp);
if (!gotvp) {
error = nfs_lookitup(dvp, cnp->cn_nameptr,
cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np);
if (!error)
newvp = NFSTOV(np);
}
}
if (v3)
nfsm_wcc_data(dvp, wccflag, 0);
nfsm_reqdone;
if (error) {
if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
fmode &= ~O_EXCL;
goto again;
}
if (newvp)
vput(newvp);
} else if (v3 && (fmode & O_EXCL))
error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc);
if (!error) {
if (cnp->cn_flags & MAKEENTRY)
cache_enter(dvp, newvp, cnp);
*ap->a_vpp = newvp;
}
PNBUF_PUT(cnp->cn_pnbuf);
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!wccflag)
VTONFS(dvp)->n_attrstamp = 0;
VN_KNOTE(ap->a_dvp, NOTE_WRITE);
vput(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(v)
void *v;
{
struct vop_remove_args /* {
struct vnodeop_desc *a_desc;
struct vnode * a_dvp;
struct vnode * a_vp;
struct componentname * a_cnp;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct vnode *dvp = ap->a_dvp;
struct componentname *cnp = ap->a_cnp;
struct nfsnode *np = VTONFS(vp);
int error = 0;
struct vattr vattr;
#ifndef DIAGNOSTIC
if ((cnp->cn_flags & HASBUF) == 0)
panic("nfs_remove: no name");
if (vp->v_usecount < 1)
panic("nfs_remove: bad v_usecount");
#endif
if (vp->v_type == VDIR)
error = EPERM;
else if (vp->v_usecount == 1 || (np->n_sillyrename &&
VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 &&
vattr.va_nlink > 1)) {
/*
* 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 later.
*/
error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1);
/* Do the rpc */
if (error != EINTR)
error = nfs_removerpc(dvp, cnp->cn_nameptr,
cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc);
/*
* 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;
} else if (!np->n_sillyrename)
error = nfs_sillyrename(dvp, vp, cnp);
PNBUF_PUT(cnp->cn_pnbuf);
np->n_attrstamp = 0;
VN_KNOTE(vp, NOTE_DELETE);
VN_KNOTE(dvp, NOTE_WRITE);
if (dvp == vp)
vrele(vp);
else
vput(vp);
vput(dvp);
return (error);
}
/*
* nfs file remove rpc called from nfs_inactive
*/
int
nfs_removeit(sp)
struct sillyrename *sp;
{
return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred,
(struct proc *)0));
}
/*
* Nfs remove rpc, called from nfs_remove() and nfs_removeit().
*/
int
nfs_removerpc(dvp, name, namelen, cred, proc)
struct vnode *dvp;
const char *name;
int namelen;
struct ucred *cred;
struct proc *proc;
{
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, wccflag = NFSV3_WCCRATTR;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
const int v3 = NFS_ISV3(dvp);
nfsstats.rpccnt[NFSPROC_REMOVE]++;
nfsm_reqhead(dvp, NFSPROC_REMOVE,
NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
nfsm_fhtom(dvp, v3);
nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
nfsm_request(dvp, NFSPROC_REMOVE, proc, cred);
if (v3)
nfsm_wcc_data(dvp, wccflag, 0);
nfsm_reqdone;
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!wccflag)
VTONFS(dvp)->n_attrstamp = 0;
return (error);
}
/*
* nfs file rename call
*/
int
nfs_rename(v)
void *v;
{
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 = v;
struct vnode *fvp = ap->a_fvp;
struct vnode *tvp = ap->a_tvp;
struct vnode *fdvp = ap->a_fdvp;
struct vnode *tdvp = ap->a_tdvp;
struct componentname *tcnp = ap->a_tcnp;
struct componentname *fcnp = ap->a_fcnp;
int error;
#ifndef DIAGNOSTIC
if ((tcnp->cn_flags & HASBUF) == 0 ||
(fcnp->cn_flags & HASBUF) == 0)
panic("nfs_rename: no name");
#endif
/* Check for cross-device rename */
if ((fvp->v_mount != tdvp->v_mount) ||
(tvp && (fvp->v_mount != tvp->v_mount))) {
error = EXDEV;
goto out;
}
/*
* If the tvp exists and is in use, sillyrename it before doing the
* rename of the new file over it.
*/
if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
VN_KNOTE(tvp, NOTE_DELETE);
vput(tvp);
tvp = NULL;
}
error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
tcnp->cn_proc);
VN_KNOTE(fdvp, NOTE_WRITE);
VN_KNOTE(tdvp, NOTE_WRITE);
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;
struct sillyrename *sp;
{
return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc));
}
/*
* Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
*/
int
nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc)
struct vnode *fdvp;
const char *fnameptr;
int fnamelen;
struct vnode *tdvp;
const char *tnameptr;
int tnamelen;
struct ucred *cred;
struct proc *proc;
{
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
const int v3 = NFS_ISV3(fdvp);
nfsstats.rpccnt[NFSPROC_RENAME]++;
nfsm_reqhead(fdvp, NFSPROC_RENAME,
(NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
nfsm_rndup(tnamelen));
nfsm_fhtom(fdvp, v3);
nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
nfsm_fhtom(tdvp, v3);
nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
nfsm_request(fdvp, NFSPROC_RENAME, proc, cred);
if (v3) {
nfsm_wcc_data(fdvp, fwccflag, 0);
nfsm_wcc_data(tdvp, twccflag, 0);
}
nfsm_reqdone;
VTONFS(fdvp)->n_flag |= NMODIFIED;
VTONFS(tdvp)->n_flag |= NMODIFIED;
if (!fwccflag)
VTONFS(fdvp)->n_attrstamp = 0;
if (!twccflag)
VTONFS(tdvp)->n_attrstamp = 0;
return (error);
}
/*
* nfs hard link create call
*/
int
nfs_link(v)
void *v;
{
struct vop_link_args /* {
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct vnode *dvp = ap->a_dvp;
struct componentname *cnp = ap->a_cnp;
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
/* XXX Should be const and initialised? */
int v3;
if (dvp->v_mount != vp->v_mount) {
VOP_ABORTOP(dvp, cnp);
vput(dvp);
return (EXDEV);
}
if (dvp != vp) {
error = vn_lock(vp, LK_EXCLUSIVE);
if (error != 0) {
VOP_ABORTOP(dvp, cnp);
vput(dvp);
return error;
}
}
/*
* 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(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc);
v3 = NFS_ISV3(vp);
nfsstats.rpccnt[NFSPROC_LINK]++;
nfsm_reqhead(vp, NFSPROC_LINK,
NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
nfsm_fhtom(vp, v3);
nfsm_fhtom(dvp, v3);
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred);
if (v3) {
nfsm_postop_attr(vp, attrflag, 0);
nfsm_wcc_data(dvp, wccflag, 0);
}
nfsm_reqdone;
PNBUF_PUT(cnp->cn_pnbuf);
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!attrflag)
VTONFS(vp)->n_attrstamp = 0;
if (!wccflag)
VTONFS(dvp)->n_attrstamp = 0;
if (dvp != vp)
VOP_UNLOCK(vp, 0);
VN_KNOTE(vp, NOTE_LINK);
VN_KNOTE(dvp, NOTE_WRITE);
vput(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
*/
int
nfs_symlink(v)
void *v;
{
struct vop_symlink_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
char *a_target;
} */ *ap = v;
struct vnode *dvp = ap->a_dvp;
struct vattr *vap = ap->a_vap;
struct componentname *cnp = ap->a_cnp;
struct nfsv2_sattr *sp;
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct vnode *newvp = (struct vnode *)0;
const int v3 = NFS_ISV3(dvp);
*ap->a_vpp = NULL;
nfsstats.rpccnt[NFSPROC_SYMLINK]++;
slen = strlen(ap->a_target);
nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
nfsm_fhtom(dvp, v3);
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
if (v3)
nfsm_v3attrbuild(vap, FALSE);
nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
if (!v3) {
nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
sp->sa_uid = nfs_xdrneg1;
sp->sa_gid = nfs_xdrneg1;
sp->sa_size = nfs_xdrneg1;
txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
}
nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred);
if (v3) {
if (!error)
nfsm_mtofh(dvp, newvp, v3, gotvp);
nfsm_wcc_data(dvp, wccflag, 0);
}
nfsm_reqdone;
/*
* Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
*/
if (error == EEXIST)
error = 0;
if (error == 0 && newvp == NULL) {
struct nfsnode *np = NULL;
error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
cnp->cn_cred, cnp->cn_proc, &np);
if (error == 0)
newvp = NFSTOV(np);
}
if (error) {
if (newvp != NULL)
vput(newvp);
} else {
*ap->a_vpp = newvp;
}
PNBUF_PUT(cnp->cn_pnbuf);
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!wccflag)
VTONFS(dvp)->n_attrstamp = 0;
VN_KNOTE(dvp, NOTE_WRITE);
vput(dvp);
return (error);
}
/*
* nfs make dir call
*/
int
nfs_mkdir(v)
void *v;
{
struct vop_mkdir_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap = v;
struct vnode *dvp = ap->a_dvp;
struct vattr *vap = ap->a_vap;
struct componentname *cnp = ap->a_cnp;
struct nfsv2_sattr *sp;
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
int len;
struct nfsnode *np = (struct nfsnode *)0;
struct vnode *newvp = (struct vnode *)0;
caddr_t bpos, dpos, cp2;
int error = 0, wccflag = NFSV3_WCCRATTR;
int gotvp = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
const int v3 = NFS_ISV3(dvp);
len = cnp->cn_namelen;
nfsstats.rpccnt[NFSPROC_MKDIR]++;
nfsm_reqhead(dvp, NFSPROC_MKDIR,
NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
nfsm_fhtom(dvp, v3);
nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
if (v3) {
nfsm_v3attrbuild(vap, FALSE);
} else {
nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
sp->sa_uid = nfs_xdrneg1;
sp->sa_gid = nfs_xdrneg1;
sp->sa_size = nfs_xdrneg1;
txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
}
nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred);
if (!error)
nfsm_mtofh(dvp, newvp, v3, gotvp);
if (v3)
nfsm_wcc_data(dvp, wccflag, 0);
nfsm_reqdone;
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!wccflag)
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.
*/
if (error == EEXIST || (!error && !gotvp)) {
if (newvp) {
vput(newvp);
newvp = (struct vnode *)0;
}
error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
cnp->cn_proc, &np);
if (!error) {
newvp = NFSTOV(np);
if (newvp->v_type != VDIR)
error = EEXIST;
}
}
if (error) {
if (newvp)
vput(newvp);
} else {
VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK);
if (cnp->cn_flags & MAKEENTRY)
cache_enter(dvp, newvp, cnp);
*ap->a_vpp = newvp;
}
PNBUF_PUT(cnp->cn_pnbuf);
vput(dvp);
return (error);
}
/*
* nfs remove directory call
*/
int
nfs_rmdir(v)
void *v;
{
struct vop_rmdir_args /* {
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct vnode *dvp = ap->a_dvp;
struct componentname *cnp = ap->a_cnp;
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, wccflag = NFSV3_WCCRATTR;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
const int v3 = NFS_ISV3(dvp);
if (dvp == vp) {
vrele(dvp);
vput(dvp);
PNBUF_PUT(cnp->cn_pnbuf);
return (EINVAL);
}
nfsstats.rpccnt[NFSPROC_RMDIR]++;
nfsm_reqhead(dvp, NFSPROC_RMDIR,
NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
nfsm_fhtom(dvp, v3);
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred);
if (v3)
nfsm_wcc_data(dvp, wccflag, 0);
nfsm_reqdone;
PNBUF_PUT(cnp->cn_pnbuf);
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!wccflag)
VTONFS(dvp)->n_attrstamp = 0;
VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK);
VN_KNOTE(vp, NOTE_DELETE);
cache_purge(dvp);
cache_purge(vp);
vput(vp);
vput(dvp);
/*
* Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
*/
if (error == ENOENT)
error = 0;
return (error);
}
/*
* nfs readdir call
*/
int
nfs_readdir(v)
void *v;
{
struct vop_readdir_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
int *a_eofflag;
off_t **a_cookies;
int *a_ncookies;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
char *base = uio->uio_iov->iov_base;
int tresid, error;
size_t count, lost;
struct dirent *dp;
off_t *cookies = NULL;
int ncookies = 0, nc;
if (vp->v_type != VDIR)
return (EPERM);
lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1);
count = uio->uio_resid - lost;
if (count <= 0)
return (EINVAL);
/*
* Call nfs_bioread() to do the real work.
*/
tresid = uio->uio_resid = count;
error = nfs_bioread(vp, uio, 0, ap->a_cred,
ap->a_cookies ? NFSBIO_CACHECOOKIES : 0);
if (!error && ap->a_cookies) {
ncookies = count / 16;
cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK);
*ap->a_cookies = cookies;
}
if (!error && uio->uio_resid == tresid) {
uio->uio_resid += lost;
nfsstats.direofcache_misses++;
if (ap->a_cookies)
*ap->a_ncookies = 0;
*ap->a_eofflag = 1;
return (0);
}
if (!error && ap->a_cookies) {
/*
* Only the NFS server and emulations use cookies, and they
* load the directory block into system space, so we can
* just look at it directly.
*/
if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
panic("nfs_readdir: lost in space");
for (nc = 0; ncookies-- &&
base < (char *)uio->uio_iov->iov_base; nc++){
dp = (struct dirent *) base;
if (dp->d_reclen == 0)
break;
if (nmp->nm_flag & NFSMNT_XLATECOOKIE)
*(cookies++) = (off_t)NFS_GETCOOKIE32(dp);
else
*(cookies++) = NFS_GETCOOKIE(dp);
base += dp->d_reclen;
}
uio->uio_resid +=
((caddr_t)uio->uio_iov->iov_base - base);
uio->uio_iov->iov_len +=
((caddr_t)uio->uio_iov->iov_base - base);
uio->uio_iov->iov_base = base;
*ap->a_ncookies = nc;
}
uio->uio_resid += lost;
*ap->a_eofflag = 0;
return (error);
}
/*
* Readdir rpc call.
* Called from below the buffer cache by nfs_doio().
*/
int
nfs_readdirrpc(vp, uiop, cred)
struct vnode *vp;
struct uio *uiop;
struct ucred *cred;
{
int len, left;
struct dirent *dp = NULL;
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
caddr_t bpos, dpos, cp2;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
struct nfsnode *dnp = VTONFS(vp);
u_quad_t fileno;
int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
int attrflag, nrpcs = 0, reclen;
const int v3 = NFS_ISV3(vp);
#ifdef DIAGNOSTIC
/*
* Should be called from buffer cache, so only amount of
* NFS_DIRBLKSIZ will be requested.
*/
if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1)))
panic("nfs readdirrpc bad uio");
#endif
/*
* Loop around doing readdir rpc's of size nm_readdirsize
* truncated to a multiple of NFS_DIRFRAGSIZ.
* The stopping criteria is EOF or buffer full.
*/
while (more_dirs && bigenough) {
/*
* Heuristic: don't bother to do another RPC to further
* fill up this block if there is not much room left. (< 50%
* of the readdir RPC size). This wastes some buffer space
* but can save up to 50% in RPC calls.
*/
if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) {
bigenough = 0;
break;
}
nfsstats.rpccnt[NFSPROC_READDIR]++;
nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
NFSX_READDIR(v3));
nfsm_fhtom(vp, v3);
if (v3) {
nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) {
txdr_swapcookie3(uiop->uio_offset, tl);
} else {
txdr_cookie3(uiop->uio_offset, tl);
}
tl += 2;
*tl++ = dnp->n_cookieverf.nfsuquad[0];
*tl++ = dnp->n_cookieverf.nfsuquad[1];
} else {
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
*tl++ = txdr_unsigned(uiop->uio_offset);
}
*tl = txdr_unsigned(nmp->nm_readdirsize);
nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred);
nrpcs++;
if (v3) {
nfsm_postop_attr(vp, attrflag, 0);
if (!error) {
nfsm_dissect(tl, u_int32_t *,
2 * NFSX_UNSIGNED);
dnp->n_cookieverf.nfsuquad[0] = *tl++;
dnp->n_cookieverf.nfsuquad[1] = *tl;
} else {
m_freem(mrep);
goto nfsmout;
}
}
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
more_dirs = fxdr_unsigned(int, *tl);
/* loop thru the dir entries, doctoring them to 4bsd form */
while (more_dirs && bigenough) {
if (v3) {
nfsm_dissect(tl, u_int32_t *,
3 * NFSX_UNSIGNED);
fileno = fxdr_hyper(tl);
len = fxdr_unsigned(int, *(tl + 2));
} else {
nfsm_dissect(tl, u_int32_t *,
2 * NFSX_UNSIGNED);
fileno = fxdr_unsigned(u_quad_t, *tl++);
len = fxdr_unsigned(int, *tl);
}
if (len <= 0 || len > NFS_MAXNAMLEN) {
error = EBADRPC;
m_freem(mrep);
goto nfsmout;
}
tlen = nfsm_rndup(len);
if (tlen == len)
tlen += 4; /* To ensure null termination */
tlen += sizeof (off_t) + sizeof (int);
reclen = ALIGN(tlen + DIRHDSIZ);
tlen = reclen - DIRHDSIZ;
left = NFS_DIRFRAGSIZ - blksiz;
if (reclen > left) {
dp->d_reclen += left;
uiop->uio_iov->iov_base =
(caddr_t)uiop->uio_iov->iov_base + left;
uiop->uio_iov->iov_len -= left;
uiop->uio_resid -= left;
blksiz = 0;
NFS_STASHCOOKIE(dp, uiop->uio_offset);
}
if (reclen > uiop->uio_resid)
bigenough = 0;
if (bigenough) {
dp = (struct dirent *)uiop->uio_iov->iov_base;
dp->d_fileno = (int)fileno;
dp->d_namlen = len;
dp->d_reclen = reclen;
dp->d_type = DT_UNKNOWN;
blksiz += dp->d_reclen;
if (blksiz == NFS_DIRFRAGSIZ)
blksiz = 0;
uiop->uio_resid -= DIRHDSIZ;
uiop->uio_iov->iov_base =
(caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ;
uiop->uio_iov->iov_len -= DIRHDSIZ;
nfsm_mtouio(uiop, len);
cp = uiop->uio_iov->iov_base;
tlen -= len;
*cp = '\0'; /* null terminate */
uiop->uio_iov->iov_base =
(caddr_t)uiop->uio_iov->iov_base + tlen;
uiop->uio_iov->iov_len -= tlen;
uiop->uio_resid -= tlen;
} else
nfsm_adv(nfsm_rndup(len));
if (v3) {
nfsm_dissect(tl, u_int32_t *,
3 * NFSX_UNSIGNED);
} else {
nfsm_dissect(tl, u_int32_t *,
2 * NFSX_UNSIGNED);
}
if (bigenough) {
if (v3) {
if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE)
uiop->uio_offset =
fxdr_swapcookie3(tl);
else
uiop->uio_offset =
fxdr_cookie3(tl);
}
else {
uiop->uio_offset =
fxdr_unsigned(off_t, *tl);
}
NFS_STASHCOOKIE(dp, uiop->uio_offset);
}
if (v3)
tl += 2;
else
tl++;
more_dirs = fxdr_unsigned(int, *tl);
}
/*
* If at end of rpc data, get the eof boolean
*/
if (!more_dirs) {
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
more_dirs = (fxdr_unsigned(int, *tl) == 0);
}
m_freem(mrep);
}
/*
* Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ
* by increasing d_reclen for the last record.
*/
if (blksiz > 0) {
left = NFS_DIRFRAGSIZ - blksiz;
dp->d_reclen += left;
NFS_STASHCOOKIE(dp, uiop->uio_offset);
uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base +
left;
uiop->uio_iov->iov_len -= left;
uiop->uio_resid -= left;
}
/*
* We are now either at the end of the directory or have filled the
* block.
*/
if (bigenough)
dnp->n_direofoffset = uiop->uio_offset;
nfsmout:
return (error);
}
/*
* NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
*/
int
nfs_readdirplusrpc(vp, uiop, cred)
struct vnode *vp;
struct uio *uiop;
struct ucred *cred;
{
int len, left;
struct dirent *dp = NULL;
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
struct vnode *newvp;
caddr_t bpos, dpos, cp2;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
struct nameidata nami, *ndp = &nami;
struct componentname *cnp = &ndp->ni_cnd;
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
struct nfsnode *dnp = VTONFS(vp), *np;
nfsfh_t *fhp;
u_quad_t fileno;
int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
int attrflag, fhsize, nrpcs = 0, reclen;
struct nfs_fattr fattr, *fp;
#ifdef DIAGNOSTIC
if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1)))
panic("nfs readdirplusrpc bad uio");
#endif
ndp->ni_dvp = vp;
newvp = NULLVP;
/*
* Loop around doing readdir rpc's of size nm_readdirsize
* truncated to a multiple of NFS_DIRFRAGSIZ.
* The stopping criteria is EOF or buffer full.
*/
while (more_dirs && bigenough) {
if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) {
bigenough = 0;
break;
}
nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
NFSX_FH(1) + 6 * NFSX_UNSIGNED);
nfsm_fhtom(vp, 1);
nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) {
txdr_swapcookie3(uiop->uio_offset, tl);
} else {
txdr_cookie3(uiop->uio_offset, tl);
}
tl += 2;
*tl++ = dnp->n_cookieverf.nfsuquad[0];
*tl++ = dnp->n_cookieverf.nfsuquad[1];
*tl++ = txdr_unsigned(nmp->nm_readdirsize);
*tl = txdr_unsigned(nmp->nm_rsize);
nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred);
nfsm_postop_attr(vp, attrflag, 0);
if (error) {
m_freem(mrep);
goto nfsmout;
}
nrpcs++;
nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
dnp->n_cookieverf.nfsuquad[0] = *tl++;
dnp->n_cookieverf.nfsuquad[1] = *tl++;
more_dirs = fxdr_unsigned(int, *tl);
/* loop thru the dir entries, doctoring them to 4bsd form */
while (more_dirs && bigenough) {
nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
fileno = fxdr_hyper(tl);
len = fxdr_unsigned(int, *(tl + 2));
if (len <= 0 || len > NFS_MAXNAMLEN) {
error = EBADRPC;
m_freem(mrep);
goto nfsmout;
}
tlen = nfsm_rndup(len);
if (tlen == len)
tlen += 4; /* To ensure null termination*/
tlen += sizeof (off_t) + sizeof (int);
reclen = ALIGN(tlen + DIRHDSIZ);
tlen = reclen - DIRHDSIZ;
left = NFS_DIRFRAGSIZ - blksiz;
if (reclen > left) {
/*
* DIRFRAGSIZ is aligned, no need to align
* again here.
*/
dp->d_reclen += left;
uiop->uio_iov->iov_base =
(caddr_t)uiop->uio_iov->iov_base + left;
uiop->uio_iov->iov_len -= left;
uiop->uio_resid -= left;
NFS_STASHCOOKIE(dp, uiop->uio_offset);
blksiz = 0;
}
if (reclen > uiop->uio_resid)
bigenough = 0;
if (bigenough) {
dp = (struct dirent *)uiop->uio_iov->iov_base;
dp->d_fileno = (int)fileno;
dp->d_namlen = len;
dp->d_reclen = reclen;
dp->d_type = DT_UNKNOWN;
blksiz += dp->d_reclen;
if (blksiz == NFS_DIRFRAGSIZ)
blksiz = 0;
uiop->uio_resid -= DIRHDSIZ;
uiop->uio_iov->iov_base =
(caddr_t)uiop->uio_iov->iov_base +
DIRHDSIZ;
uiop->uio_iov->iov_len -= DIRHDSIZ;
cnp->cn_nameptr = uiop->uio_iov->iov_base;
cnp->cn_namelen = len;
nfsm_mtouio(uiop, len);
cp = uiop->uio_iov->iov_base;
tlen -= len;
*cp = '\0';
uiop->uio_iov->iov_base =
(caddr_t)uiop->uio_iov->iov_base + tlen;
uiop->uio_iov->iov_len -= tlen;
uiop->uio_resid -= tlen;
} else
nfsm_adv(nfsm_rndup(len));
nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
if (bigenough) {
if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE)
uiop->uio_offset =
fxdr_swapcookie3(tl);
else
uiop->uio_offset =
fxdr_cookie3(tl);
NFS_STASHCOOKIE(dp, uiop->uio_offset);
}
tl += 2;
/*
* Since the attributes are before the file handle
* (sigh), we must skip over the attributes and then
* come back and get them.
*/
attrflag = fxdr_unsigned(int, *tl);
if (attrflag) {
nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR);
memcpy(&fattr, fp, NFSX_V3FATTR);
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
doit = fxdr_unsigned(int, *tl);
if (doit) {
nfsm_getfh(fhp, fhsize, 1);
if (NFS_CMPFH(dnp, fhp, fhsize)) {
VREF(vp);
newvp = vp;
np = dnp;
} else {
error = nfs_nget(vp->v_mount, fhp,
fhsize, &np);
if (!error)
newvp = NFSTOV(np);
}
if (!error) {
const char *cp;
nfs_loadattrcache(&newvp, &fattr, 0, 0);
dp->d_type =
IFTODT(VTTOIF(np->n_vattr->va_type));
ndp->ni_vp = newvp;
cp = cnp->cn_nameptr + cnp->cn_namelen;
cnp->cn_hash =
namei_hash(cnp->cn_nameptr, &cp);
if (cnp->cn_namelen <= NCHNAMLEN)
cache_enter(ndp->ni_dvp, ndp->ni_vp,
cnp);
}
}
} else {
/* Just skip over the file handle */
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
i = fxdr_unsigned(int, *tl);
nfsm_adv(nfsm_rndup(i));
}
if (newvp != NULLVP) {
if (newvp == vp)
vrele(newvp);
else
vput(newvp);
newvp = NULLVP;
}
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
more_dirs = fxdr_unsigned(int, *tl);
}
/*
* If at end of rpc data, get the eof boolean
*/
if (!more_dirs) {
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
more_dirs = (fxdr_unsigned(int, *tl) == 0);
}
m_freem(mrep);
}
/*
* Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ
* by increasing d_reclen for the last record.
*/
if (blksiz > 0) {
left = NFS_DIRFRAGSIZ - blksiz;
dp->d_reclen += left;
NFS_STASHCOOKIE(dp, uiop->uio_offset);
uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base +
left;
uiop->uio_iov->iov_len -= left;
uiop->uio_resid -= left;
}
/*
* We are now either at the end of the directory or have filled the
* block.
*/
if (bigenough)
dnp->n_direofoffset = uiop->uio_offset;
nfsmout:
if (newvp != NULLVP) {
if(newvp == vp)
vrele(newvp);
else
vput(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;
{
struct sillyrename *sp;
struct nfsnode *np;
int error;
short pid;
cache_purge(dvp);
np = VTONFS(vp);
#ifndef DIAGNOSTIC
if (vp->v_type == VDIR)
panic("nfs: sillyrename dir");
#endif
MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
M_NFSREQ, M_WAITOK);
sp->s_cred = crdup(cnp->cn_cred);
sp->s_dvp = dvp;
VREF(dvp);
/* Fudge together a funny name */
pid = cnp->cn_proc->p_pid;
memcpy(sp->s_name, ".nfsAxxxx4.4", 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(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
cnp->cn_proc, (struct nfsnode **)0) == 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;
error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
cnp->cn_proc, &np);
np->n_sillyrename = sp;
return (0);
bad:
vrele(sp->s_dvp);
crfree(sp->s_cred);
free((caddr_t)sp, M_NFSREQ);
return (error);
}
/*
* Look up a file name and optionally either update the file handle or
* allocate an nfsnode, depending on the value of npp.
* npp == NULL --> just do the lookup
* *npp == NULL --> allocate a new nfsnode and make sure attributes are
* handled too
* *npp != NULL --> update the file handle in the vnode
*/
int
nfs_lookitup(dvp, name, len, cred, procp, npp)
struct vnode *dvp;
const char *name;
int len;
struct ucred *cred;
struct proc *procp;
struct nfsnode **npp;
{
u_int32_t *tl;
caddr_t cp;
int32_t t1, t2;
struct vnode *newvp = (struct vnode *)0;
struct nfsnode *np, *dnp = VTONFS(dvp);
caddr_t bpos, dpos, cp2;
int error = 0, fhlen, attrflag;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
nfsfh_t *nfhp;
const int v3 = NFS_ISV3(dvp);
nfsstats.rpccnt[NFSPROC_LOOKUP]++;
nfsm_reqhead(dvp, NFSPROC_LOOKUP,
NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
nfsm_fhtom(dvp, v3);
nfsm_strtom(name, len, NFS_MAXNAMLEN);
nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred);
if (npp && !error) {
nfsm_getfh(nfhp, fhlen, v3);
if (*npp) {
np = *npp;
if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
free((caddr_t)np->n_fhp, M_NFSBIGFH);
np->n_fhp = &np->n_fh;
} else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK);
memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen);
np->n_fhsize = fhlen;
newvp = NFSTOV(np);
} else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
VREF(dvp);
newvp = dvp;
} else {
error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
if (error) {
m_freem(mrep);
return (error);
}
newvp = NFSTOV(np);
}
if (v3) {
nfsm_postop_attr(newvp, attrflag, 0);
if (!attrflag && *npp == NULL) {
m_freem(mrep);
vput(newvp);
return (ENOENT);
}
} else
nfsm_loadattr(newvp, (struct vattr *)0, 0);
}
nfsm_reqdone;
if (npp && *npp == NULL) {
if (error) {
if (newvp)
vput(newvp);
} else
*npp = np;
}
return (error);
}
/*
* Nfs Version 3 commit rpc
*/
int
nfs_commit(vp, offset, cnt, procp)
struct vnode *vp;
off_t offset;
uint32_t cnt;
struct proc *procp;
{
caddr_t cp;
u_int32_t *tl;
int32_t t1, t2;
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
caddr_t bpos, dpos, cp2;
int error = 0, wccflag = NFSV3_WCCRATTR;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
#ifdef fvdl_debug
printf("commit %lu - %lu\n", (unsigned long)offset,
(unsigned long)(offset + cnt));
#endif
if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0)
return (0);
nfsstats.rpccnt[NFSPROC_COMMIT]++;
nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
nfsm_fhtom(vp, 1);
nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
txdr_hyper(offset, tl);
tl += 2;
*tl = txdr_unsigned(cnt);
nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred);
nfsm_wcc_data(vp, wccflag, 0);
if (!error) {
nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
NFSX_V3WRITEVERF)) {
memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl,
NFSX_V3WRITEVERF);
error = NFSERR_STALEWRITEVERF;
}
}
nfsm_reqdone;
return (error);
}
/*
* Kludge City..
* - make nfs_bmap() essentially a no-op that does no translation
* - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
* (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 memcpy() and also it currently happens in the
* context of the swapper process (2).
*/
int
nfs_bmap(v)
void *v;
{
struct vop_bmap_args /* {
struct vnode *a_vp;
daddr_t a_bn;
struct vnode **a_vpp;
daddr_t *a_bnp;
int *a_runp;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift;
if (ap->a_vpp != NULL)
*ap->a_vpp = vp;
if (ap->a_bnp != NULL)
*ap->a_bnp = ap->a_bn << bshift;
if (ap->a_runp != NULL)
*ap->a_runp = 1024 * 1024; /* XXX */
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(v)
void *v;
{
struct vop_strategy_args *ap = v;
struct buf *bp = ap->a_bp;
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 = NULL;
else
p = curproc; /* XXX */
/*
* 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))
error = nfs_doio(bp, p);
return (error);
}
/*
* fsync vnode op. Just call nfs_flush() with commit == 1.
*/
/* ARGSUSED */
int
nfs_fsync(v)
void *v;
{
struct vop_fsync_args /* {
struct vnodeop_desc *a_desc;
struct vnode * a_vp;
struct ucred * a_cred;
int a_flags;
off_t offlo;
off_t offhi;
struct proc * a_p;
} */ *ap = v;
return (nfs_flush(ap->a_vp, ap->a_cred,
(ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1));
}
/*
* Flush all the data associated with a vnode.
*/
int
nfs_flush(vp, cred, waitfor, p, commit)
struct vnode *vp;
struct ucred *cred;
int waitfor;
struct proc *p;
int commit;
{
struct nfsnode *np = VTONFS(vp);
int error;
int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO;
UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist);
simple_lock(&vp->v_interlock);
error = VOP_PUTPAGES(vp, 0, 0, flushflags);
if (np->n_flag & NWRITEERR) {
error = np->n_error;
np->n_flag &= ~NWRITEERR;
}
UVMHIST_LOG(ubchist, "returning %d", error,0,0,0);
return (error);
}
/*
* Return POSIX pathconf information applicable to nfs.
*
* N.B. The NFS V2 protocol doesn't support this RPC.
*/
/* ARGSUSED */
int
nfs_pathconf(v)
void *v;
{
struct vop_pathconf_args /* {
struct vnode *a_vp;
int a_name;
register_t *a_retval;
} */ *ap = v;
struct nfsv3_pathconf *pcp;
struct vnode *vp = ap->a_vp;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
int32_t t1, t2;
u_int32_t *tl;
caddr_t bpos, dpos, cp, cp2;
int error = 0, attrflag;
#ifndef NFS_V2_ONLY
struct nfsmount *nmp;
unsigned int l;
u_int64_t maxsize;
#endif
const int v3 = NFS_ISV3(vp);
switch (ap->a_name) {
/* Names that can be resolved locally. */
case _PC_PIPE_BUF:
*ap->a_retval = PIPE_BUF;
break;
case _PC_SYNC_IO:
*ap->a_retval = 1;
break;
/* Names that cannot be resolved locally; do an RPC, if possible. */
case _PC_LINK_MAX:
case _PC_NAME_MAX:
case _PC_CHOWN_RESTRICTED:
case _PC_NO_TRUNC:
if (!v3) {
error = EINVAL;
break;
}
nfsstats.rpccnt[NFSPROC_PATHCONF]++;
nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1));
nfsm_fhtom(vp, 1);
nfsm_request(vp, NFSPROC_PATHCONF,
curproc, curproc->p_ucred); /* XXX */
nfsm_postop_attr(vp, attrflag, 0);
if (!error) {
nfsm_dissect(pcp, struct nfsv3_pathconf *,
NFSX_V3PATHCONF);
switch (ap->a_name) {
case _PC_LINK_MAX:
*ap->a_retval =
fxdr_unsigned(register_t, pcp->pc_linkmax);
break;
case _PC_NAME_MAX:
*ap->a_retval =
fxdr_unsigned(register_t, pcp->pc_namemax);
break;
case _PC_CHOWN_RESTRICTED:
*ap->a_retval =
(pcp->pc_chownrestricted == nfs_true);
break;
case _PC_NO_TRUNC:
*ap->a_retval =
(pcp->pc_notrunc == nfs_true);
break;
}
}
nfsm_reqdone;
break;
case _PC_FILESIZEBITS:
#ifndef NFS_V2_ONLY
if (v3) {
nmp = VFSTONFS(vp->v_mount);
if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0)
if ((error = nfs_fsinfo(nmp, vp,
curproc->p_ucred, curproc)) != 0) /* XXX */
break;
for (l = 0, maxsize = nmp->nm_maxfilesize;
(maxsize >> l) > 0; l++)
;
*ap->a_retval = l + 1;
} else
#endif
{
*ap->a_retval = 32; /* NFS V2 limitation */
}
break;
default:
error = EINVAL;
break;
}
return (error);
}
/*
* NFS advisory byte-level locks.
*/
int
nfs_advlock(v)
void *v;
{
struct vop_advlock_args /* {
struct vnode *a_vp;
caddr_t a_id;
int a_op;
struct flock *a_fl;
int a_flags;
} */ *ap = v;
struct nfsnode *np = VTONFS(ap->a_vp);
return lf_advlock(ap, &np->n_lockf, np->n_size);
}
/*
* Print out the contents of an nfsnode.
*/
int
nfs_print(v)
void *v;
{
struct vop_print_args /* {
struct vnode *a_vp;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
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 file truncation.
*/
int
nfs_truncate(v)
void *v;
{
#if 0
struct vop_truncate_args /* {
struct vnode *a_vp;
off_t a_length;
int a_flags;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap = v;
#endif
/* Use nfs_setattr */
return (EOPNOTSUPP);
}
/*
* NFS update.
*/
int
nfs_update(v)
void *v;
#if 0
struct vop_update_args /* {
struct vnode *a_vp;
struct timespec *a_ta;
struct timespec *a_tm;
int a_waitfor;
} */ *ap = v;
#endif
{
/* Use nfs_setattr */
return (EOPNOTSUPP);
}
/*
* Just call bwrite().
*/
int
nfs_bwrite(v)
void *v;
{
struct vop_bwrite_args /* {
struct vnode *a_bp;
} */ *ap = v;
return (bwrite(ap->a_bp));
}
/*
* nfs unlock wrapper.
*/
int
nfs_unlock(void *v)
{
struct vop_unlock_args /* {
struct vnode *a_vp;
int a_flags;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
/*
* VOP_UNLOCK can be called by nfs_loadattrcache
* with v_data == 0.
*/
if (VTONFS(vp)) {
nfs_delayedtruncate(vp);
}
return genfs_unlock(v);
}
/*
* 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(v)
void *v;
{
struct vop_access_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap = v;
struct vattr va;
struct vnode *vp = ap->a_vp;
int error;
error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p);
if (error)
return (error);
/*
* Disallow write attempts on filesystems mounted read-only;
* unless the file is a socket, fifo, or a block or character
* device resident on the filesystem.
*/
if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
switch (vp->v_type) {
case VREG:
case VDIR:
case VLNK:
return (EROFS);
default:
break;
}
}
return (vaccess(va.va_type, va.va_mode,
va.va_uid, va.va_gid, ap->a_mode, ap->a_cred));
}
/*
* Read wrapper for special devices.
*/
int
nfsspec_read(v)
void *v;
{
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap = v;
struct nfsnode *np = VTONFS(ap->a_vp);
/*
* Set access flag.
*/
np->n_flag |= NACC;
np->n_atim.tv_sec = time.tv_sec;
np->n_atim.tv_nsec = time.tv_usec * 1000;
return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap));
}
/*
* Write wrapper for special devices.
*/
int
nfsspec_write(v)
void *v;
{
struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap = v;
struct nfsnode *np = VTONFS(ap->a_vp);
/*
* Set update flag.
*/
np->n_flag |= NUPD;
np->n_mtim.tv_sec = time.tv_sec;
np->n_mtim.tv_nsec = time.tv_usec * 1000;
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(v)
void *v;
{
struct vop_close_args /* {
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
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 = np->n_atim;
if (np->n_flag & NUPD)
vattr.va_mtime = np->n_mtim;
(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(v)
void *v;
{
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap = v;
struct nfsnode *np = VTONFS(ap->a_vp);
/*
* Set access flag.
*/
np->n_flag |= NACC;
np->n_atim.tv_sec = time.tv_sec;
np->n_atim.tv_nsec = time.tv_usec * 1000;
return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap));
}
/*
* Write wrapper for fifos.
*/
int
nfsfifo_write(v)
void *v;
{
struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap = v;
struct nfsnode *np = VTONFS(ap->a_vp);
/*
* Set update flag.
*/
np->n_flag |= NUPD;
np->n_mtim.tv_sec = time.tv_sec;
np->n_mtim.tv_nsec = time.tv_usec * 1000;
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(v)
void *v;
{
struct vop_close_args /* {
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct nfsnode *np = VTONFS(vp);
struct vattr vattr;
if (np->n_flag & (NACC | NUPD)) {
if (np->n_flag & NACC) {
np->n_atim.tv_sec = time.tv_sec;
np->n_atim.tv_nsec = time.tv_usec * 1000;
}
if (np->n_flag & NUPD) {
np->n_mtim.tv_sec = time.tv_sec;
np->n_mtim.tv_nsec = time.tv_usec * 1000;
}
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 = np->n_atim;
if (np->n_flag & NUPD)
vattr.va_mtime = np->n_mtim;
(void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p);
}
}
return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap));
}
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