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NetBSD/sys/nfs/nfs_vnops.c
thorpej aa25de69d1 NFS performance improvement from Doug Rabson/FreeBSD: 
Improve the queuing algorithms used by NFS' asynchronous i/o.  The
existing mechanism uses a global queue for some buffers and the
vp->b_dirtyblkhd queue for others.  This turns sequential writes into
randomly ordered writes to the server, affecting both read and write
performance.  The existing mechanism also copes badly with hung
servers, tending to block accesses to other servers when all the iods
are waiting for a hung server.

The new mechanism uses a queue for each mount point.  All asynchronous
i/o goes through this queue which preserves the ordering of requests.
A simple mechanism ensures that the iods are shared out fairly between
active mount points.

Reviewed/integrated/approved by Frank van der Linden <fvdl@netbsd.org>
1996-12-02 22:55:39 +00:00

3298 lines
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/* $NetBSD: nfs_vnops.c,v 1.69 1996/12/02 22:55:45 thorpej 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 8.16 (Berkeley) 5/27/95
*/
/*
* vnode op calls for Sun NFS version 2 and 3
*/
#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/conf.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/dirent.h>
#include <sys/fcntl.h>
#include <sys/lockf.h>
#include <vm/vm.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 *));
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_ioctl_desc, nfs_ioctl }, /* ioctl */
{ &vop_poll_desc, nfs_poll }, /* poll */
#ifdef Lite2_integrated
{ &vop_revoke_desc, nfs_revoke }, /* revoke */
#endif
{ &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 */
{ (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL }
};
struct vnodeopv_desc nfsv2_vnodeop_opv_desc =
{ &nfsv2_vnodeop_p, nfsv2_vnodeop_entries };
/*
* Special device vnode ops
*/
int (**spec_nfsv2nodeop_p) __P((void *));
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_ioctl_desc, spec_ioctl }, /* ioctl */
{ &vop_poll_desc, spec_poll }, /* poll */
#ifdef Lite2_integrated
{ &vop_revoke_desc, spec_revoke }, /* revoke */
#endif
{ &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 }, /* bwrite */
{ (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL }
};
struct vnodeopv_desc spec_nfsv2nodeop_opv_desc =
{ &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries };
#ifdef FIFO
int (**fifo_nfsv2nodeop_p) __P((void *));
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_ioctl_desc, fifo_ioctl }, /* ioctl */
{ &vop_poll_desc, fifo_poll }, /* poll */
#ifdef Lite2_integrated
{ &vop_revoke_desc, fifo_revoke }, /* revoke */
#endif
{ &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 */
{ (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL }
};
struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc =
{ &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries };
#endif /* FIFO */
/*
* Global variables
*/
extern u_int32_t nfs_true, nfs_false;
extern u_int32_t nfs_xdrneg1;
extern struct nfsstats nfsstats;
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;
register struct vnode *vp = ap->a_vp;
register u_int32_t *tl;
register caddr_t cp;
register int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, attrflag;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
u_int32_t mode, rmode;
int v3 = NFS_ISV3(vp);
/*
* 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;
}
}
/*
* 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 |
NFSV3ACCESS_DELETE);
if (ap->a_mode & VEXEC)
mode |= NFSV3ACCESS_LOOKUP;
} else {
if (ap->a_mode & VWRITE)
mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
if (ap->a_mode & VEXEC)
mode |= NFSV3ACCESS_EXECUTE;
}
*tl = txdr_unsigned(mode);
nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred);
nfsm_postop_attr(vp, attrflag);
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;
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(v)
void *v;
{
struct vop_open_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap = v;
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) {
#ifdef DIAGNOSTIC
printf("open eacces vtyp=%d\n",vp->v_type);
#endif
return (EACCES);
}
/*
* 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);
(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;
if (vp->v_type == VDIR)
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)
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.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;
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)) {
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;
}
}
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;
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
register caddr_t cp;
register u_int32_t *tl;
register int32_t t1, t2;
caddr_t bpos, dpos;
int error = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
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);
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;
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
register struct vattr *vap = ap->a_vap;
int error = 0;
u_quad_t tsize = 0;
/*
* Disallow write attempts if the filesystem is mounted read-only.
*/
if ((vap->va_flags != VNOVAL || 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 == (u_short)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);
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.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;
vnode_pager_setsize(vp, (u_long)np->n_size);
}
return (error);
}
/*
* Do an nfs setattr rpc.
*/
int
nfs_setattrrpc(vp, vap, cred, procp)
register struct vnode *vp;
register struct vattr *vap;
struct ucred *cred;
struct proc *procp;
{
register struct nfsv2_sattr *sp;
register caddr_t cp;
register 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;
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) {
if (vap->va_mode != (u_short)VNOVAL) {
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
*tl++ = nfs_true;
*tl = txdr_unsigned(vap->va_mode);
} else {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = nfs_false;
}
if (vap->va_uid != (uid_t)VNOVAL) {
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
*tl++ = nfs_true;
*tl = txdr_unsigned(vap->va_uid);
} else {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = nfs_false;
}
if (vap->va_gid != (gid_t)VNOVAL) {
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
*tl++ = nfs_true;
*tl = txdr_unsigned(vap->va_gid);
} else {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = nfs_false;
}
if (vap->va_size != VNOVAL) {
nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
*tl++ = nfs_true;
txdr_hyper(&vap->va_size, tl);
} else {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = nfs_false;
}
if (vap->va_atime.tv_sec != VNOVAL) {
if (vap->va_atime.tv_sec != time.tv_sec) {
nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
*tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
txdr_nfsv3time(&vap->va_atime, tl);
} else {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
}
} else {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
}
if (vap->va_mtime.tv_sec != VNOVAL) {
if (vap->va_mtime.tv_sec != time.tv_sec) {
nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
*tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
txdr_nfsv3time(&vap->va_mtime, tl);
} else {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
}
} else {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
}
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = nfs_false;
} else {
nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
if (vap->va_mode == (u_short)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);
} else
nfsm_loadattr(vp, (struct vattr *)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
*/
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;
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 *newvp;
register u_int32_t *tl;
register caddr_t cp;
register int32_t t1, t2;
struct nfsmount *nmp;
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;
int v3 = NFS_ISV3(dvp);
*vpp = 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);
nmp = VFSTONFS(dvp->v_mount);
np = VTONFS(dvp);
if ((error = cache_lookup(dvp, vpp, cnp)) != 0 && error != ENOENT) {
struct vattr vattr;
int vpid;
newvp = *vpp;
vpid = newvp->v_id;
/*
* See the comment starting `Step through' in ufs/ufs_lookup.c
* for an explanation of the locking protocol
*/
if (dvp == newvp) {
VREF(newvp);
error = 0;
} else
#ifdef Lite2_integrated
error = vget(newvp, LK_EXCLUSIVE, p);
#else
error = vget(newvp, 1);
#endif
if (!error) {
if (vpid == newvp->v_id) {
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;
return (0);
}
cache_purge(newvp);
}
vrele(newvp);
}
*vpp = NULLVP;
}
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);
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);
nfsm_postop_attr(dvp, attrflag);
} else
nfsm_loadattr(newvp, (struct vattr *)0);
*vpp = newvp;
m_freem(mrep);
cnp->cn_flags |= SAVENAME;
return (0);
}
if (NFS_CMPFH(np, fhp, fhsize)) {
VREF(dvp);
newvp = dvp;
} else {
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);
nfsm_postop_attr(dvp, attrflag);
} else
nfsm_loadattr(newvp, (struct vattr *)0);
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) {
if (newvp != NULLVP)
vrele(newvp);
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;
}
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;
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(v)
void *v;
{
struct vop_readlink_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
} */ *ap = v;
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_int32_t *tl;
register caddr_t cp;
register int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, len, attrflag;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
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);
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, cred)
register struct vnode *vp;
struct uio *uiop;
struct ucred *cred;
{
register u_int32_t *tl;
register caddr_t cp;
register 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;
int v3 = NFS_ISV3(vp);
#ifndef nolint
eof = 0;
#endif
nmp = VFSTONFS(vp->v_mount);
tsiz = uiop->uio_resid;
if (uiop->uio_offset + tsiz > 0xffffffff && !v3)
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, cred);
if (v3) {
nfsm_postop_attr(vp, attrflag);
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);
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, cred, iomode, must_commit)
register struct vnode *vp;
register struct uio *uiop;
struct ucred *cred;
int *iomode, *must_commit;
{
register u_int32_t *tl;
register caddr_t cp;
register 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;
int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
#ifndef DIAGNOSTIC
if (uiop->uio_iovcnt != 1)
panic("nfs: writerpc iovcnt > 1");
#endif
*must_commit = 0;
tsiz = uiop->uio_resid;
if (uiop->uio_offset + tsiz > 0xffffffff && !v3)
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(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 {
register 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, cred);
if (v3) {
wccflag = NFSV3_WCCCHK;
nfsm_wcc_data(vp, wccflag);
if (!error) {
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
+ NFSX_V3WRITEVERF);
rlen = fxdr_unsigned(int, *tl++);
if (rlen == 0) {
error = NFSERR_IO;
break;
} else if (rlen < len) {
backup = len - rlen;
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_flag & NFSMNT_HASWRITEVERF) == 0) {
bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
NFSX_V3WRITEVERF);
nmp->nm_flag |= NFSMNT_HASWRITEVERF;
} else if (bcmp((caddr_t)tl,
(caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
*must_commit = 1;
bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
NFSX_V3WRITEVERF);
}
}
} else
nfsm_loadattr(vp, (struct vattr *)0);
if (wccflag)
VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec;
m_freem(mrep);
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)
register struct vnode *dvp;
register struct vnode **vpp;
register struct componentname *cnp;
register struct vattr *vap;
{
register struct nfsv2_sattr *sp;
register struct nfsv3_sattr *sp3;
register u_int32_t *tl;
register caddr_t cp;
register 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;
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 + NFSX_V3SRVSATTR);
*tl++ = vtonfsv3_type(vap->va_type);
sp3 = (struct nfsv3_sattr *)tl;
nfsm_v3sattr(sp3, vap);
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) {
if (newvp) {
vrele(newvp);
newvp = (struct vnode *)0;
}
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);
nfsm_reqdone;
if (error) {
if (newvp)
vrele(newvp);
} else {
if (cnp->cn_flags & MAKEENTRY)
cache_enter(dvp, newvp, cnp);
*vpp = newvp;
}
FREE(cnp->cn_pnbuf, M_NAMEI);
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!wccflag)
VTONFS(dvp)->n_attrstamp = 0;
vrele(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;
struct vnode *newvp;
int error;
error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap);
if (!error)
vrele(newvp);
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;
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 struct nfsv3_sattr *sp3;
register u_int32_t *tl;
register caddr_t cp;
register int32_t t1, t2;
struct nfsnode *np = (struct nfsnode *)0;
struct vnode *newvp = (struct vnode *)0;
caddr_t bpos, dpos, cp2;
int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
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:
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);
if (in_ifaddr.tqh_first)
*tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr;
else
*tl++ = create_verf;
*tl = ++create_verf;
} else {
*tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
nfsm_build(tl, u_int32_t *, NFSX_V3SRVSATTR);
sp3 = (struct nfsv3_sattr *)tl;
nfsm_v3sattr(sp3, vap);
}
} 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) {
if (newvp) {
vrele(newvp);
newvp = (struct vnode *)0;
}
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);
nfsm_reqdone;
if (error) {
if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
fmode &= ~O_EXCL;
goto again;
}
if (newvp)
vrele(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;
}
FREE(cnp->cn_pnbuf, M_NAMEI);
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!wccflag)
VTONFS(dvp)->n_attrstamp = 0;
vrele(dvp);
return (error);
}
/*
* nfs file remove call
* To try and make nfs semantics closer to ufs semantics, a file that has
* other processes using the vnode is renamed instead of removed and then
* removed later on the last close.
* - If v_usecount > 1
* If a rename is not already in the works
* call nfs_sillyrename() to set it up
* else
* do the remove rpc
*/
int
nfs_remove(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;
register struct vnode *vp = ap->a_vp;
register struct vnode *dvp = ap->a_dvp;
register struct componentname *cnp = ap->a_cnp;
register struct nfsnode *np = VTONFS(vp);
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_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);
FREE(cnp->cn_pnbuf, M_NAMEI);
np->n_attrstamp = 0;
vrele(dvp);
vrele(vp);
return (error);
}
/*
* nfs file remove rpc called from nfs_inactive
*/
int
nfs_removeit(sp)
register struct sillyrename *sp;
{
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)
register struct vnode *dvp;
const char *name;
int namelen;
struct ucred *cred;
struct proc *proc;
{
register u_int32_t *tl;
register caddr_t cp;
register int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, wccflag = NFSV3_WCCRATTR;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
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);
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;
register struct vnode *fvp = ap->a_fvp;
register struct vnode *tvp = ap->a_tvp;
register struct vnode *fdvp = ap->a_fdvp;
register struct vnode *tdvp = ap->a_tdvp;
register struct componentname *tcnp = ap->a_tcnp;
register struct componentname *fcnp = ap->a_fcnp;
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 &&
!nfs_sillyrename(tdvp, tvp, tcnp)) {
vrele(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);
if (fvp->v_type == VDIR) {
if (tvp != NULL && tvp->v_type == VDIR)
cache_purge(tdvp);
cache_purge(fdvp);
}
out:
if (tdvp == tvp)
vrele(tdvp);
else
vput(tdvp);
if (tvp)
vput(tvp);
vrele(fdvp);
vrele(fvp);
/*
* Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
*/
if (error == ENOENT)
error = 0;
return (error);
}
/*
* nfs file rename rpc called from nfs_remove() above
*/
int
nfs_renameit(sdvp, scnp, sp)
struct vnode *sdvp;
struct componentname *scnp;
register struct sillyrename *sp;
{
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)
register struct vnode *fdvp;
const char *fnameptr;
int fnamelen;
register struct vnode *tdvp;
const char *tnameptr;
int tnamelen;
struct ucred *cred;
struct proc *proc;
{
register u_int32_t *tl;
register caddr_t cp;
register 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;
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);
nfsm_wcc_data(tdvp, twccflag);
}
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;
register struct vnode *vp = ap->a_vp;
register struct vnode *dvp = ap->a_dvp;
register struct componentname *cnp = ap->a_cnp;
register u_int32_t *tl;
register caddr_t cp;
register int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
int v3 = NFS_ISV3(vp);
if (dvp->v_mount != vp->v_mount) {
FREE(cnp->cn_pnbuf, M_NAMEI);
if (vp == dvp)
vrele(dvp);
else
vput(dvp);
return (EXDEV);
}
/*
* Push all writes to the server, so that the attribute cache
* doesn't get "out of sync" with the server.
* XXX There should be a better way!
*/
VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc);
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);
nfsm_wcc_data(dvp, wccflag);
}
nfsm_reqdone;
FREE(cnp->cn_pnbuf, M_NAMEI);
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!attrflag)
VTONFS(vp)->n_attrstamp = 0;
if (!wccflag)
VTONFS(dvp)->n_attrstamp = 0;
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;
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 struct nfsv3_sattr *sp3;
register u_int32_t *tl;
register caddr_t cp;
register 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;
int v3 = NFS_ISV3(dvp);
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_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR);
nfsm_v3sattr(sp3, vap);
}
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);
}
nfsm_reqdone;
if (newvp)
vrele(newvp);
FREE(cnp->cn_pnbuf, M_NAMEI);
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!wccflag)
VTONFS(dvp)->n_attrstamp = 0;
vrele(dvp);
/*
* Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
*/
if (error == EEXIST)
error = 0;
return (error);
}
/*
* nfs make dir call
*/
int
nfs_mkdir(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;
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 struct nfsv3_sattr *sp3;
register u_int32_t *tl;
register caddr_t cp;
register int32_t t1, t2;
register 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;
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_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR);
nfsm_v3sattr(sp3, vap);
} 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);
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) {
vrele(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)
vrele(newvp);
} else
*ap->a_vpp = newvp;
FREE(cnp->cn_pnbuf, M_NAMEI);
vrele(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;
register struct vnode *vp = ap->a_vp;
register struct vnode *dvp = ap->a_dvp;
register struct componentname *cnp = ap->a_cnp;
register u_int32_t *tl;
register caddr_t cp;
register int32_t t1, t2;
caddr_t bpos, dpos, cp2;
int error = 0, wccflag = NFSV3_WCCRATTR;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
int v3 = NFS_ISV3(dvp);
if (dvp == vp) {
vrele(dvp);
vrele(dvp);
FREE(cnp->cn_pnbuf, M_NAMEI);
return (EINVAL);
}
nfsstats.rpccnt[NFSPROC_RMDIR]++;
nfsm_reqhead(dvp, NFSPROC_RMDIR,
NFSX_FH(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);
nfsm_reqdone;
FREE(cnp->cn_pnbuf, M_NAMEI);
VTONFS(dvp)->n_flag |= NMODIFIED;
if (!wccflag)
VTONFS(dvp)->n_attrstamp = 0;
cache_purge(dvp);
cache_purge(vp);
vrele(vp);
vrele(dvp);
/*
* Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
*/
if (error == ENOENT)
error = 0;
return (error);
}
/*
* nfs readdir call
*/
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;
u_long *a_cookies;
int a_ncookies;
} */ *ap = v;
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
register struct uio *uio = ap->a_uio;
char *base = uio->uio_iov->iov_base;
off_t off = uio->uio_offset;
int tresid, error;
struct vattr vattr;
if (vp->v_type != VDIR)
return (EPERM);
/*
* First, check for hit on the EOF offset cache
*/
if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
(np->n_flag & NMODIFIED) == 0) {
if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
if (NQNFS_CKCACHABLE(vp, ND_READ)) {
nfsstats.direofcache_hits++;
*ap->a_eofflag = 1;
return (0);
}
} else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 &&
np->n_mtime == vattr.va_mtime.tv_sec) {
nfsstats.direofcache_hits++;
*ap->a_eofflag = 1;
return (0);
}
}
/*
* Call nfs_bioread() to do the real work.
*/
tresid = uio->uio_resid;
error = nfs_bioread(vp, uio, 0, ap->a_cred);
if (!error && uio->uio_resid == tresid) {
nfsstats.direofcache_misses++;
*ap->a_eofflag = 1;
return (0);
}
if (!error && ap->a_cookies) {
struct dirent *dp;
u_long *cookies = ap->a_cookies;
int ncookies = ap->a_ncookies;
/*
* 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");
while (ncookies-- && base < uio->uio_iov->iov_base) {
dp = (struct dirent *) base;
if (dp->d_reclen == 0)
break;
off += dp->d_reclen;
*(cookies++) = off;
base += dp->d_reclen;
}
uio->uio_resid += (uio->uio_iov->iov_base - base);
uio->uio_iov->iov_len += (uio->uio_iov->iov_base - base);
uio->uio_iov->iov_base = base;
}
*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;
register struct uio *uiop;
struct ucred *cred;
{
register int len, left;
register struct dirent *dp = NULL;
register u_int32_t *tl;
register caddr_t cp;
register int32_t t1, t2;
register nfsuint64 *cookiep;
caddr_t bpos, dpos, cp2;
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
nfsuint64 cookie;
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;
int v3 = NFS_ISV3(vp);
#ifndef DIAGNOSTIC
if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (NFS_DIRBLKSIZ - 1)) ||
(uiop->uio_resid & (NFS_DIRBLKSIZ - 1)))
panic("nfs readdirrpc bad uio");
#endif
/*
* If there is no cookie, assume end of directory.
*/
cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
if (cookiep)
cookie = *cookiep;
else
return (0);
/*
* Loop around doing readdir rpc's of size nm_readdirsize
* truncated to a multiple of NFS_READDIRBLKSIZ.
* The stopping criteria is EOF or buffer full.
*/
while (more_dirs && bigenough) {
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);
*tl++ = cookie.nfsuquad[0];
*tl++ = cookie.nfsuquad[1];
*tl++ = dnp->n_cookieverf.nfsuquad[0];
*tl++ = dnp->n_cookieverf.nfsuquad[1];
} else {
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
*tl++ = cookie.nfsuquad[0];
}
*tl = txdr_unsigned(nmp->nm_readdirsize);
nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred);
if (v3) {
nfsm_postop_attr(vp, attrflag);
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);
fxdr_hyper(tl, &fileno);
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 */
left = NFS_READDIRBLKSIZ - blksiz;
if ((tlen + DIRHDSIZ) > left) {
dp->d_reclen += left;
uiop->uio_iov->iov_base += left;
uiop->uio_iov->iov_len -= left;
uiop->uio_offset += left;
uiop->uio_resid -= left;
blksiz = 0;
}
if ((tlen + DIRHDSIZ) > 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 = tlen + DIRHDSIZ;
dp->d_type = DT_UNKNOWN;
blksiz += dp->d_reclen;
if (blksiz == NFS_READDIRBLKSIZ)
blksiz = 0;
uiop->uio_offset += DIRHDSIZ;
uiop->uio_resid -= DIRHDSIZ;
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 += tlen;
uiop->uio_iov->iov_len -= tlen;
uiop->uio_offset += 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) {
cookie.nfsuquad[0] = *tl++;
if (v3)
cookie.nfsuquad[1] = *tl++;
} else 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_READDIRBLKSIZ
* by increasing d_reclen for the last record.
*/
if (blksiz > 0) {
left = NFS_READDIRBLKSIZ - blksiz;
dp->d_reclen += left;
uiop->uio_iov->iov_base += left;
uiop->uio_iov->iov_len -= left;
uiop->uio_offset += 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;
else {
if (uiop->uio_resid > 0)
printf("EEK! readdirrpc resid > 0\n");
cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
*cookiep = cookie;
}
nfsmout:
return (error);
}
/*
* NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
*/
int
nfs_readdirplusrpc(vp, uiop, cred)
struct vnode *vp;
register struct uio *uiop;
struct ucred *cred;
{
register int len, left;
register struct dirent *dp = NULL;
register u_int32_t *tl;
register caddr_t cp;
register int32_t t1, t2;
register struct vnode *newvp;
register nfsuint64 *cookiep;
caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
struct nameidata nami, *ndp = &nami;
struct componentname *cnp = &ndp->ni_cnd;
nfsuint64 cookie;
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
struct nfsnode *dnp = VTONFS(vp), *np;
const unsigned char *hcp;
nfsfh_t *fhp;
u_quad_t fileno;
int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
int attrflag, fhsize;
#ifndef DIAGNOSTIC
if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (NFS_DIRBLKSIZ - 1)) ||
(uiop->uio_resid & (NFS_DIRBLKSIZ - 1)))
panic("nfs readdirplusrpc bad uio");
#endif
ndp->ni_dvp = vp;
newvp = NULLVP;
/*
* If there is no cookie, assume end of directory.
*/
cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
if (cookiep)
cookie = *cookiep;
else
return (0);
/*
* Loop around doing readdir rpc's of size nm_readdirsize
* truncated to a multiple of NFS_READDIRBLKSIZ.
* The stopping criteria is EOF or buffer full.
*/
while (more_dirs && bigenough) {
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);
*tl++ = cookie.nfsuquad[0];
*tl++ = cookie.nfsuquad[1];
*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);
if (error) {
m_freem(mrep);
goto nfsmout;
}
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);
fxdr_hyper(tl, &fileno);
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*/
left = NFS_READDIRBLKSIZ - blksiz;
if ((tlen + DIRHDSIZ) > left) {
dp->d_reclen += left;
uiop->uio_iov->iov_base += left;
uiop->uio_iov->iov_len -= left;
uiop->uio_offset += left;
uiop->uio_resid -= left;
blksiz = 0;
}
if ((tlen + DIRHDSIZ) > 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 = tlen + DIRHDSIZ;
dp->d_type = DT_UNKNOWN;
blksiz += dp->d_reclen;
if (blksiz == NFS_READDIRBLKSIZ)
blksiz = 0;
uiop->uio_offset += DIRHDSIZ;
uiop->uio_resid -= DIRHDSIZ;
uiop->uio_iov->iov_base += DIRHDSIZ;
uiop->uio_iov->iov_len -= DIRHDSIZ;
cnp->cn_nameptr = uiop->uio_iov->iov_base;
cnp->cn_namelen = len;
nfsm_mtouio(uiop, len);
cp = uiop->uio_iov->iov_base;
tlen -= len;
*cp = '\0';
uiop->uio_iov->iov_base += tlen;
uiop->uio_iov->iov_len -= tlen;
uiop->uio_offset += tlen;
uiop->uio_resid -= tlen;
} else
nfsm_adv(nfsm_rndup(len));
nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
if (bigenough) {
cookie.nfsuquad[0] = *tl++;
cookie.nfsuquad[1] = *tl++;
} else
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) {
dpossav1 = dpos;
mdsav1 = md;
nfsm_adv(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)
doit = 0;
else
newvp = NFSTOV(np);
}
}
if (doit) {
dpossav2 = dpos;
dpos = dpossav1;
mdsav2 = md;
md = mdsav1;
nfsm_loadattr(newvp, (struct vattr *)0);
dpos = dpossav2;
md = mdsav2;
dp->d_type =
IFTODT(VTTOIF(np->n_vattr.va_type));
ndp->ni_vp = newvp;
cnp->cn_hash = 0;
for (hcp = cnp->cn_nameptr, i = 1; i <= len;
i++, hcp++)
cnp->cn_hash += *hcp * i;
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) {
vrele(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_READDIRBLKSIZ
* by increasing d_reclen for the last record.
*/
if (blksiz > 0) {
left = NFS_READDIRBLKSIZ - blksiz;
dp->d_reclen += left;
uiop->uio_iov->iov_base += left;
uiop->uio_iov->iov_len -= left;
uiop->uio_offset += 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;
else {
if (uiop->uio_resid > 0)
printf("EEK! readdirplusrpc resid > 0\n");
cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
*cookiep = cookie;
}
nfsmout:
if (newvp != NULLVP)
vrele(newvp);
return (error);
}
static char hextoasc[] = "0123456789abcdef";
/*
* Silly rename. To make the NFS filesystem that is stateless look a little
* more like the "ufs" a remove of an active vnode is translated to a rename
* to a funny looking filename that is removed by nfs_inactive on the
* nfsnode. There is the potential for another process on a different client
* to create the same funny name between the nfs_lookitup() fails and the
* nfs_rename() completes, but...
*/
int
nfs_sillyrename(dvp, vp, cnp)
struct vnode *dvp, *vp;
struct componentname *cnp;
{
register struct 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;
bcopy(".nfsAxxxx4.4", sp->s_name, 13);
sp->s_namlen = 12;
sp->s_name[8] = hextoasc[pid & 0xf];
sp->s_name[7] = hextoasc[(pid >> 4) & 0xf];
sp->s_name[6] = hextoasc[(pid >> 8) & 0xf];
sp->s_name[5] = hextoasc[(pid >> 12) & 0xf];
/* Try lookitups until we get one that isn't there */
while (nfs_lookitup(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)
register struct vnode *dvp;
const char *name;
int len;
struct ucred *cred;
struct proc *procp;
struct nfsnode **npp;
{
register u_int32_t *tl;
register caddr_t cp;
register 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;
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);
bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, 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);
if (!attrflag && *npp == NULL) {
m_freem(mrep);
vrele(newvp);
return (ENOENT);
}
} else
nfsm_loadattr(newvp, (struct vattr *)0);
}
nfsm_reqdone;
if (npp && *npp == NULL) {
if (error) {
if (newvp)
vrele(newvp);
} else
*npp = np;
}
return (error);
}
/*
* Nfs Version 3 commit rpc
*/
int
nfs_commit(vp, offset, cnt, cred, procp)
register struct vnode *vp;
u_quad_t offset;
int cnt;
struct ucred *cred;
struct proc *procp;
{
register caddr_t cp;
register u_int32_t *tl;
register int32_t t1, t2;
register 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;
if ((nmp->nm_flag & 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, cred);
nfsm_wcc_data(vp, wccflag);
if (!error) {
nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
NFSX_V3WRITEVERF)) {
bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
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 bcopy() 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;
register struct vnode *vp = ap->a_vp;
if (ap->a_vpp != NULL)
*ap->a_vpp = vp;
if (ap->a_bnp != NULL)
*ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize);
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;
register struct buf *bp = ap->a_bp;
struct ucred *cr;
struct proc *p;
int error = 0;
if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC))
panic("nfs physio/async");
if (bp->b_flags & B_ASYNC)
p = (struct proc *)0;
else
p = curproc; /* XXX */
if (bp->b_flags & B_READ)
cr = bp->b_rcred;
else
cr = bp->b_wcred;
/*
* If the op is asynchronous and an i/o daemon is waiting
* queue the request, wake it up and wait for completion
* otherwise just do it ourselves.
*/
if ((bp->b_flags & B_ASYNC) == 0 ||
nfs_asyncio(bp, NOCRED))
error = nfs_doio(bp, cr, p);
return (error);
}
/*
* Mmap a file
*
* NB Currently unsupported.
*/
/* ARGSUSED */
int
nfs_mmap(v)
void *v;
{
#if 0
struct vop_mmap_args /* {
struct vnode *a_vp;
int a_fflags;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap = v;
#endif
return (EINVAL);
}
/*
* 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_waitfor;
struct proc * a_p;
} */ *ap = v;
return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1));
}
/*
* Flush all the blocks associated with a vnode.
* Walk through the buffer pool and push any dirty pages
* associated with the vnode.
*/
int
nfs_flush(vp, cred, waitfor, p, commit)
register struct vnode *vp;
struct ucred *cred;
int waitfor;
struct proc *p;
int commit;
{
register struct nfsnode *np = VTONFS(vp);
register struct buf *bp;
register int i;
struct buf *nbp;
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
int passone = 1;
u_quad_t off = (u_quad_t)-1, endoff = 0, toff;
struct ucred* wcred = NULL;
#ifndef NFS_COMMITBVECSIZ
#define NFS_COMMITBVECSIZ 20
#endif
struct buf *bvec[NFS_COMMITBVECSIZ];
if (nmp->nm_flag & NFSMNT_INT)
slpflag = PCATCH;
if (!commit)
passone = 0;
/*
* A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
* server, but nas not been committed to stable storage on the server
* yet. On the first pass, the byte range is worked out and the commit
* rpc is done. On the second pass, nfs_writebp() is called to do the
* job.
*/
again:
bvecpos = 0;
if (NFS_ISV3(vp) && commit) {
s = splbio();
for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
nbp = bp->b_vnbufs.le_next;
if (bvecpos >= NFS_COMMITBVECSIZ)
break;
if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT))
!= (B_DELWRI | B_NEEDCOMMIT))
continue;
bremfree(bp);
/*
* Work out if all buffers are using the same cred
* so we can deal with them all with one commit.
*/
if (wcred == NULL)
wcred = bp->b_wcred;
else if (wcred != bp->b_wcred)
wcred = NOCRED;
bp->b_flags |= (B_BUSY | B_WRITEINPROG);
/*
* A list of these buffers is kept so that the
* second loop knows which buffers have actually
* been committed. This is necessary, since there
* may be a race between the commit rpc and new
* uncommitted writes on the file.
*/
bvec[bvecpos++] = bp;
toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
bp->b_dirtyoff;
if (toff < off)
off = toff;
toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
if (toff > endoff)
endoff = toff;
}
splx(s);
}
if (bvecpos > 0) {
/*
* Commit data on the server, as required.
* If all bufs are using the same wcred, then use that with
* one call for all of them, otherwise commit each one
* separately.
*/
if (wcred != NOCRED)
retv = nfs_commit(vp, off, (int)(endoff - off),
wcred, p);
else {
retv = 0;
for (i = 0; i < bvecpos; i++) {
off_t off, size;
bp = bvec[i];
off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
bp->b_dirtyoff;
size = (u_quad_t)(bp->b_dirtyend
- bp->b_dirtyoff);
retv = nfs_commit(vp, off, (int)size,
bp->b_wcred, p);
if (retv) break;
}
}
if (retv == NFSERR_STALEWRITEVERF)
nfs_clearcommit(vp->v_mount);
/*
* Now, either mark the blocks I/O done or mark the
* blocks dirty, depending on whether the commit
* succeeded.
*/
for (i = 0; i < bvecpos; i++) {
bp = bvec[i];
bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG);
if (retv)
brelse(bp);
else {
vp->v_numoutput++;
bp->b_flags |= B_ASYNC;
bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI);
bp->b_dirtyoff = bp->b_dirtyend = 0;
reassignbuf(bp, vp);
biodone(bp);
}
}
}
/*
* Start/do any write(s) that are required.
*/
loop:
s = splbio();
for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
nbp = bp->b_vnbufs.le_next;
if (bp->b_flags & B_BUSY) {
if (waitfor != MNT_WAIT || passone)
continue;
bp->b_flags |= B_WANTED;
error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1),
"nfsfsync", slptimeo);
splx(s);
if (error) {
if (nfs_sigintr(nmp, (struct nfsreq *)0, p))
return (EINTR);
if (slpflag == PCATCH) {
slpflag = 0;
slptimeo = 2 * hz;
}
}
goto loop;
}
if ((bp->b_flags & B_DELWRI) == 0)
panic("nfs_fsync: not dirty");
if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT))
continue;
bremfree(bp);
if (passone || !commit)
bp->b_flags |= (B_BUSY|B_ASYNC);
else
bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT);
splx(s);
VOP_BWRITE(bp);
goto loop;
}
splx(s);
if (passone) {
passone = 0;
goto again;
}
if (waitfor == MNT_WAIT) {
while (vp->v_numoutput) {
vp->v_flag |= VBWAIT;
error = tsleep((caddr_t)&vp->v_numoutput,
slpflag | (PRIBIO + 1), "nfsfsync", slptimeo);
if (error) {
if (nfs_sigintr(nmp, (struct nfsreq *)0, p))
return (EINTR);
if (slpflag == PCATCH) {
slpflag = 0;
slptimeo = 2 * hz;
}
}
}
if (vp->v_dirtyblkhd.lh_first && commit) {
#if 0
vprint("nfs_fsync: dirty", vp);
#endif
goto loop;
}
}
if (np->n_flag & NWRITEERR) {
error = np->n_error;
np->n_flag &= ~NWRITEERR;
}
return (error);
}
/*
* Return POSIX pathconf information applicable to nfs.
*
* The NFS V2 protocol doesn't support this, so just return EINVAL
* for V2.
*/
/* ARGSUSED */
int
nfs_pathconf(v)
void *v;
{
#if 0
struct vop_pathconf_args /* {
struct vnode *a_vp;
int a_name;
register_t *a_retval;
} */ *ap = v;
#endif
return (EINVAL);
}
/*
* 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;
register struct nfsnode *np = VTONFS(ap->a_vp);
return (lf_advlock(&np->n_lockf, np->n_size, ap->a_id, ap->a_op,
ap->a_fl, ap->a_flags));
}
/*
* Print out the contents of an nfsnode.
*/
int
nfs_print(v)
void *v;
{
struct vop_print_args /* {
struct vnode *a_vp;
} */ *ap = v;
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
printf("tag VT_NFS, fileid %ld fsid 0x%lx",
np->n_vattr.va_fileid, np->n_vattr.va_fsid);
#ifdef FIFO
if (vp->v_type == VFIFO)
fifo_printinfo(vp);
#endif
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 nfs_writebp() with the force argument set to 1.
*/
int
nfs_bwrite(v)
void *v;
{
struct vop_bwrite_args /* {
struct vnode *a_bp;
} */ *ap = v;
return (nfs_writebp(ap->a_bp, 1));
}
/*
* This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless
* the force flag is one and it also handles the B_NEEDCOMMIT flag.
*/
int
nfs_writebp(bp, force)
register struct buf *bp;
int force;
{
register int oldflags = bp->b_flags, retv = 1;
register struct proc *p = curproc; /* XXX */
off_t off;
if(!(bp->b_flags & B_BUSY))
panic("bwrite: buffer is not busy???");
#ifdef fvdl_debug
printf("nfs_writebp(%x): vp %x voff %d vend %d doff %d dend %d\n",
bp, bp->b_vp, bp->b_validoff, bp->b_validend, bp->b_dirtyoff,
bp->b_dirtyend);
#endif
bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI);
if (oldflags & B_ASYNC) {
if (oldflags & B_DELWRI) {
reassignbuf(bp, bp->b_vp);
} else if (p) {
++p->p_stats->p_ru.ru_oublock;
}
}
bp->b_vp->v_numoutput++;
/*
* If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not
* an actual write will have to be scheduled via. VOP_STRATEGY().
* If B_WRITEINPROG is already set, then push it with a write anyhow.
*/
if ((oldflags & (B_NEEDCOMMIT | B_WRITEINPROG)) == B_NEEDCOMMIT) {
off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
bp->b_flags |= B_WRITEINPROG;
retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff,
bp->b_wcred, bp->b_proc);
bp->b_flags &= ~B_WRITEINPROG;
if (!retv) {
bp->b_dirtyoff = bp->b_dirtyend = 0;
bp->b_flags &= ~B_NEEDCOMMIT;
biodone(bp);
} else if (retv == NFSERR_STALEWRITEVERF)
nfs_clearcommit(bp->b_vp->v_mount);
}
if (retv) {
if (force)
bp->b_flags |= B_WRITEINPROG;
VOP_STRATEGY(bp);
}
if( (oldflags & B_ASYNC) == 0) {
int rtval = biowait(bp);
if (oldflags & B_DELWRI) {
reassignbuf(bp, bp->b_vp);
} else if (p) {
++p->p_stats->p_ru.ru_oublock;
}
brelse(bp);
return (rtval);
}
return (0);
}
/*
* 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;
/*
* 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;
}
}
error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p);
if (error)
return (error);
return (vaccess(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;
register 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;
register 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;
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
struct vattr vattr;
if (np->n_flag & (NACC | NUPD)) {
np->n_flag |= NCHG;
if (vp->v_usecount == 1 &&
(vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
VATTR_NULL(&vattr);
if (np->n_flag & NACC)
vattr.va_atime = 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));
}
#ifdef FIFO
/*
* 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;
extern int (**fifo_vnodeop_p) __P((void *));
register 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;
extern int (**fifo_vnodeop_p) __P((void *));
register 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;
register struct vnode *vp = ap->a_vp;
register struct nfsnode *np = VTONFS(vp);
struct vattr vattr;
extern int (**fifo_vnodeop_p) __P((void *));
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));
}
#endif /* ! FIFO */
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