smbfs_io.c revision 4bff34e37def8a90f9194d81bc345c52ba20086a
/*
* Copyright (c) 2000-2001, Boris Popov
* All rights reserved.
*
* 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 Boris Popov.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $Id: smbfs_io.c,v 1.41.38.1 2005/05/27 02:35:28 lindak Exp $
*
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/proc.h>
#include <sys/fcntl.h>
#include <sys/mount.h>
#include <sys/dirent.h>
#include <sys/syslog.h>
#include <sys/file.h>
#ifdef APPLE
#include <sys/smb_apple.h>
#else
#include <netsmb/smb_osdep.h>
#endif
#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_subr.h>
#include <smbfs/smbfs.h>
#include <smbfs/smbfs_node.h>
#include <smbfs/smbfs_subr.h>
/* XXX: This file should go away, after more work in _vnops.c */
int
smbfs_readvnode(vnode_t *vp, uio_t *uiop, cred_t *cr,
struct vattr *vap)
{
smbmntinfo_t *smp = VTOSMI(vp);
struct smbnode *np = VTOSMB(vp);
struct smb_cred scred;
int error;
int requestsize;
size_t remainder;
/* shared lock for n_fid use in smb_rwuio */
ASSERT(smbfs_rw_lock_held(&np->r_lkserlock, RW_READER));
if (vp->v_type != VREG) {
SMBVDEBUG("only VREG supported\n");
return (EIO);
}
if (uiop->uio_resid == 0)
return (0);
if (uiop->uio_loffset < 0)
return (EINVAL);
#ifdef NOT_YET
if ((uiop->uio_loffset + uiop->uio_resid) > smp->nm_maxfilesize)
return (EFBIG);
#endif
smb_credinit(&scred, curproc, cr);
/* XXX: Update n_size maybe? */
(void) smbfs_smb_flush(np, &scred);
if (uiop->uio_loffset >= vap->va_size) {
/* if offset is beyond EOF, read nothing */
error = 0;
goto out;
}
/* pin requestsize to EOF */
requestsize = min(uiop->uio_resid,
(vap->va_size - uiop->uio_loffset));
/* subtract requestSize from uio_resid and save remainder */
remainder = uiop->uio_resid - requestsize;
/* adjust size of read */
uiop->uio_resid = requestsize;
error = smb_rwuio(smp->smi_share, np->n_fid, UIO_READ, uiop,
&scred, smb_timo_read);
/* set remaining uio_resid */
uiop->uio_resid = uiop->uio_resid + remainder;
out:
smb_credrele(&scred);
return (error);
}
int
smbfs_writevnode(vnode_t *vp, uio_t *uiop,
cred_t *cr, int ioflag, int timo)
{
smbmntinfo_t *smp = VTOSMI(vp);
struct smbnode *np = VTOSMB(vp);
struct smb_cred scred;
int error = 0;
/* shared lock for n_fid use in smb_rwuio */
ASSERT(smbfs_rw_lock_held(&np->r_lkserlock, RW_READER));
if (vp->v_type != VREG) {
SMBVDEBUG("only VREG supported\n");
return (EIO);
}
SMBVDEBUG("ofs=%lld,resid=%d\n", uiop->uio_loffset,
(int)uiop->uio_resid);
if (uiop->uio_loffset < 0)
return (EINVAL);
#ifdef NOT_YET
if (uiop->uio_loffset + uiop->uio_resid > smp->nm_maxfilesize)
return (EFBIG);
#endif
if (ioflag & (FAPPEND | FSYNC)) {
if (np->n_flag & NMODIFIED) {
smbfs_attr_cacheremove(np);
/* XXX: smbfs_vinvalbuf? */
}
if (ioflag & FAPPEND) {
struct vattr vattr;
/*
* File size can be changed by another client
*/
error = smbfsgetattr(vp, &vattr, cr);
if (error)
return (error);
mutex_enter(&np->r_statelock);
uiop->uio_loffset = np->n_size;
mutex_exit(&np->r_statelock);
}
}
if (uiop->uio_resid == 0)
return (0);
smb_credinit(&scred, curproc, cr);
/*
* Darwin had code here to zero-extend using
* smb_write requests. Not needed.
*
* Use a longer timeout when appending.
* This ignores the passed-in timo value,
* but that was just a constant anyway.
* XXX: remove passed in timo arg later.
*/
timo = smb_timo_write;
if ((uiop->uio_loffset + uiop->uio_resid) > np->n_size)
timo = smb_timo_append;
error = smb_rwuio(smp->smi_share, np->n_fid, UIO_WRITE, uiop,
&scred, timo);
mutex_enter(&np->r_statelock);
np->n_flag |= (NFLUSHWIRE | NATTRCHANGED);
mutex_exit(&np->r_statelock);
smb_credrele(&scred);
SMBVDEBUG("after: ofs=%lld,resid=%d\n", uiop->uio_loffset,
(int)uiop->uio_resid);
if (!error) {
mutex_enter(&np->r_statelock);
if (uiop->uio_loffset > (offset_t)np->n_size)
np->n_size = (len_t)uiop->uio_loffset;
mutex_exit(&np->r_statelock);
}
return (error);
}