84d9c625bf
- Fix for possible unset uid/gid in toproto
- Fix for default mtree style
- Update libelf
- Importing libexecinfo
- Resynchronize GCC, mpc, gmp, mpfr
- build.sh: Replace params with show-params.
This has been done as the make target has been renamed in the same
way, while a new target named params has been added. This new
target generates a file containing all the parameters, instead of
printing it on the console.
- Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
get getservbyport() out of the inner loop
Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
404 lines
11 KiB
C
404 lines
11 KiB
C
/* $NetBSD: ext2fs_readwrite.c,v 1.64 2013/06/23 07:28:37 dholland Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1993
|
|
* The Regents of the University of California. 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. 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.
|
|
*
|
|
* @(#)ufs_readwrite.c 8.8 (Berkeley) 8/4/94
|
|
* Modified for ext2fs by Manuel Bouyer.
|
|
*/
|
|
|
|
/*-
|
|
* Copyright (c) 1997 Manuel Bouyer.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
|
|
*
|
|
* @(#)ufs_readwrite.c 8.8 (Berkeley) 8/4/94
|
|
* Modified for ext2fs by Manuel Bouyer.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: ext2fs_readwrite.c,v 1.64 2013/06/23 07:28:37 dholland Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/file.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/kauth.h>
|
|
|
|
#include <ufs/ufs/inode.h>
|
|
#include <ufs/ufs/ufsmount.h>
|
|
#include <ufs/ufs/ufs_extern.h>
|
|
#include <ufs/ext2fs/ext2fs.h>
|
|
#include <ufs/ext2fs/ext2fs_extern.h>
|
|
|
|
|
|
#define doclusterread 0 /* XXX underway */
|
|
#define doclusterwrite 0
|
|
|
|
/*
|
|
* Vnode op for reading.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
ext2fs_read(void *v)
|
|
{
|
|
struct vop_read_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
kauth_cred_t a_cred;
|
|
} */ *ap = v;
|
|
struct vnode *vp;
|
|
struct inode *ip;
|
|
struct uio *uio;
|
|
struct m_ext2fs *fs;
|
|
struct buf *bp;
|
|
struct ufsmount *ump;
|
|
vsize_t bytelen;
|
|
daddr_t lbn, nextlbn;
|
|
off_t bytesinfile;
|
|
long size, xfersize, blkoffset;
|
|
int error;
|
|
|
|
vp = ap->a_vp;
|
|
ip = VTOI(vp);
|
|
ump = ip->i_ump;
|
|
uio = ap->a_uio;
|
|
error = 0;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (uio->uio_rw != UIO_READ)
|
|
panic("%s: mode", "ext2fs_read");
|
|
|
|
if (vp->v_type == VLNK) {
|
|
if (ext2fs_size(ip) < ump->um_maxsymlinklen ||
|
|
(ump->um_maxsymlinklen == 0 && ext2fs_nblock(ip) == 0))
|
|
panic("%s: short symlink", "ext2fs_read");
|
|
} else if (vp->v_type != VREG && vp->v_type != VDIR)
|
|
panic("%s: type %d", "ext2fs_read", vp->v_type);
|
|
#endif
|
|
fs = ip->i_e2fs;
|
|
if ((uint64_t)uio->uio_offset > ump->um_maxfilesize)
|
|
return (EFBIG);
|
|
if (uio->uio_resid == 0)
|
|
return (0);
|
|
if (uio->uio_offset >= ext2fs_size(ip))
|
|
goto out;
|
|
|
|
if (vp->v_type == VREG) {
|
|
const int advice = IO_ADV_DECODE(ap->a_ioflag);
|
|
|
|
while (uio->uio_resid > 0) {
|
|
bytelen = MIN(ext2fs_size(ip) - uio->uio_offset,
|
|
uio->uio_resid);
|
|
if (bytelen == 0)
|
|
break;
|
|
|
|
error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice,
|
|
UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp));
|
|
if (error)
|
|
break;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) {
|
|
bytesinfile = ext2fs_size(ip) - uio->uio_offset;
|
|
if (bytesinfile <= 0)
|
|
break;
|
|
lbn = ext2_lblkno(fs, uio->uio_offset);
|
|
nextlbn = lbn + 1;
|
|
size = fs->e2fs_bsize;
|
|
blkoffset = ext2_blkoff(fs, uio->uio_offset);
|
|
xfersize = fs->e2fs_bsize - blkoffset;
|
|
if (uio->uio_resid < xfersize)
|
|
xfersize = uio->uio_resid;
|
|
if (bytesinfile < xfersize)
|
|
xfersize = bytesinfile;
|
|
|
|
if (ext2_lblktosize(fs, nextlbn) >= ext2fs_size(ip))
|
|
error = bread(vp, lbn, size, NOCRED, 0, &bp);
|
|
else {
|
|
int nextsize = fs->e2fs_bsize;
|
|
error = breadn(vp, lbn,
|
|
size, &nextlbn, &nextsize, 1, NOCRED, 0, &bp);
|
|
}
|
|
if (error)
|
|
break;
|
|
|
|
/*
|
|
* We should only get non-zero b_resid when an I/O error
|
|
* has occurred, which should cause us to break above.
|
|
* However, if the short read did not cause an error,
|
|
* then we want to ensure that we do not uiomove bad
|
|
* or uninitialized data.
|
|
*/
|
|
size -= bp->b_resid;
|
|
if (size < xfersize) {
|
|
if (size == 0)
|
|
break;
|
|
xfersize = size;
|
|
}
|
|
error = uiomove((char *)bp->b_data + blkoffset, xfersize, uio);
|
|
if (error)
|
|
break;
|
|
brelse(bp, 0);
|
|
}
|
|
if (bp != NULL)
|
|
brelse(bp, 0);
|
|
|
|
out:
|
|
if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) {
|
|
ip->i_flag |= IN_ACCESS;
|
|
if ((ap->a_ioflag & IO_SYNC) == IO_SYNC)
|
|
error = ext2fs_update(vp, NULL, NULL, UPDATE_WAIT);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Vnode op for writing.
|
|
*/
|
|
int
|
|
ext2fs_write(void *v)
|
|
{
|
|
struct vop_write_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
kauth_cred_t a_cred;
|
|
} */ *ap = v;
|
|
struct vnode *vp;
|
|
struct uio *uio;
|
|
struct inode *ip;
|
|
struct m_ext2fs *fs;
|
|
struct buf *bp;
|
|
struct ufsmount *ump;
|
|
daddr_t lbn;
|
|
off_t osize;
|
|
int blkoffset, error, flags, ioflag, resid, xfersize;
|
|
vsize_t bytelen;
|
|
off_t oldoff = 0; /* XXX */
|
|
bool async;
|
|
int extended = 0;
|
|
int advice;
|
|
|
|
ioflag = ap->a_ioflag;
|
|
advice = IO_ADV_DECODE(ioflag);
|
|
uio = ap->a_uio;
|
|
vp = ap->a_vp;
|
|
ip = VTOI(vp);
|
|
ump = ip->i_ump;
|
|
error = 0;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (uio->uio_rw != UIO_WRITE)
|
|
panic("%s: mode", "ext2fs_write");
|
|
#endif
|
|
|
|
switch (vp->v_type) {
|
|
case VREG:
|
|
if (ioflag & IO_APPEND)
|
|
uio->uio_offset = ext2fs_size(ip);
|
|
if ((ip->i_e2fs_flags & EXT2_APPEND) &&
|
|
uio->uio_offset != ext2fs_size(ip))
|
|
return (EPERM);
|
|
/* FALLTHROUGH */
|
|
case VLNK:
|
|
break;
|
|
case VDIR:
|
|
if ((ioflag & IO_SYNC) == 0)
|
|
panic("%s: nonsync dir write", "ext2fs_write");
|
|
break;
|
|
default:
|
|
panic("%s: type", "ext2fs_write");
|
|
}
|
|
|
|
fs = ip->i_e2fs;
|
|
if (uio->uio_offset < 0 ||
|
|
(uint64_t)uio->uio_offset + uio->uio_resid > ump->um_maxfilesize)
|
|
return (EFBIG);
|
|
if (uio->uio_resid == 0)
|
|
return (0);
|
|
|
|
async = vp->v_mount->mnt_flag & MNT_ASYNC;
|
|
resid = uio->uio_resid;
|
|
osize = ext2fs_size(ip);
|
|
|
|
if (vp->v_type == VREG) {
|
|
while (uio->uio_resid > 0) {
|
|
oldoff = uio->uio_offset;
|
|
blkoffset = ext2_blkoff(fs, uio->uio_offset);
|
|
bytelen = MIN(fs->e2fs_bsize - blkoffset,
|
|
uio->uio_resid);
|
|
|
|
if (vp->v_size < oldoff + bytelen) {
|
|
uvm_vnp_setwritesize(vp, oldoff + bytelen);
|
|
}
|
|
error = ufs_balloc_range(vp, uio->uio_offset,
|
|
bytelen, ap->a_cred, 0);
|
|
if (error)
|
|
break;
|
|
error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice,
|
|
UBC_WRITE | UBC_UNMAP_FLAG(vp));
|
|
if (error)
|
|
break;
|
|
|
|
/*
|
|
* update UVM's notion of the size now that we've
|
|
* copied the data into the vnode's pages.
|
|
*/
|
|
|
|
if (vp->v_size < uio->uio_offset) {
|
|
uvm_vnp_setsize(vp, uio->uio_offset);
|
|
extended = 1;
|
|
}
|
|
|
|
/*
|
|
* flush what we just wrote if necessary.
|
|
* XXXUBC simplistic async flushing.
|
|
*/
|
|
|
|
if (!async && oldoff >> 16 != uio->uio_offset >> 16) {
|
|
mutex_enter(vp->v_interlock);
|
|
error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16,
|
|
(uio->uio_offset >> 16) << 16,
|
|
PGO_CLEANIT | PGO_LAZY);
|
|
}
|
|
}
|
|
if (error == 0 && ioflag & IO_SYNC) {
|
|
mutex_enter(vp->v_interlock);
|
|
error = VOP_PUTPAGES(vp, trunc_page(oldoff),
|
|
round_page(ext2_blkroundup(fs, uio->uio_offset)),
|
|
PGO_CLEANIT | PGO_SYNCIO);
|
|
}
|
|
|
|
goto out;
|
|
}
|
|
|
|
flags = ioflag & IO_SYNC ? B_SYNC : 0;
|
|
for (error = 0; uio->uio_resid > 0;) {
|
|
lbn = ext2_lblkno(fs, uio->uio_offset);
|
|
blkoffset = ext2_blkoff(fs, uio->uio_offset);
|
|
xfersize = MIN(fs->e2fs_bsize - blkoffset, uio->uio_resid);
|
|
if (xfersize < fs->e2fs_bsize)
|
|
flags |= B_CLRBUF;
|
|
else
|
|
flags &= ~B_CLRBUF;
|
|
error = ext2fs_balloc(ip,
|
|
lbn, blkoffset + xfersize, ap->a_cred, &bp, flags);
|
|
if (error)
|
|
break;
|
|
if (ext2fs_size(ip) < uio->uio_offset + xfersize) {
|
|
error = ext2fs_setsize(ip, uio->uio_offset + xfersize);
|
|
if (error)
|
|
break;
|
|
}
|
|
error = uiomove((char *)bp->b_data + blkoffset, xfersize, uio);
|
|
|
|
/*
|
|
* update UVM's notion of the size now that we've
|
|
* copied the data into the vnode's pages.
|
|
*/
|
|
|
|
if (vp->v_size < uio->uio_offset) {
|
|
uvm_vnp_setsize(vp, uio->uio_offset);
|
|
extended = 1;
|
|
}
|
|
|
|
if (ioflag & IO_SYNC)
|
|
(void)bwrite(bp);
|
|
else if (xfersize + blkoffset == fs->e2fs_bsize)
|
|
bawrite(bp);
|
|
else
|
|
bdwrite(bp);
|
|
if (error || xfersize == 0)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If we successfully wrote any data, and we are not the superuser
|
|
* we clear the setuid and setgid bits as a precaution against
|
|
* tampering.
|
|
*/
|
|
|
|
out:
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
if (vp->v_mount->mnt_flag & MNT_RELATIME)
|
|
ip->i_flag |= IN_ACCESS;
|
|
if (resid > uio->uio_resid && ap->a_cred) {
|
|
if (ip->i_e2fs_mode & ISUID) {
|
|
if (kauth_authorize_vnode(ap->a_cred,
|
|
KAUTH_VNODE_RETAIN_SUID, vp, NULL, EPERM) != 0)
|
|
ip->i_e2fs_mode &= ISUID;
|
|
}
|
|
|
|
if (ip->i_e2fs_mode & ISGID) {
|
|
if (kauth_authorize_vnode(ap->a_cred,
|
|
KAUTH_VNODE_RETAIN_SGID, vp, NULL, EPERM) != 0)
|
|
ip->i_e2fs_mode &= ~ISGID;
|
|
}
|
|
}
|
|
if (resid > uio->uio_resid)
|
|
VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0));
|
|
if (error) {
|
|
(void) ext2fs_truncate(vp, osize, ioflag & IO_SYNC, ap->a_cred);
|
|
uio->uio_offset -= resid - uio->uio_resid;
|
|
uio->uio_resid = resid;
|
|
} else if (resid > uio->uio_resid && (ioflag & IO_SYNC) == IO_SYNC)
|
|
error = ext2fs_update(vp, NULL, NULL, UPDATE_WAIT);
|
|
KASSERT(vp->v_size == ext2fs_size(ip));
|
|
return (error);
|
|
}
|