80cc38a1af
between creation of a file descriptor and close(2) when using kernel assisted threads. What we do is stick descriptors in the table, but mark them as "larval". This causes essentially everything to treat it as a non-existent descriptor, except for fdalloc(), which sees a filled slot so that it won't (incorrectly) allocate it again. When a descriptor is fully constructed, the code that has constructed it marks it as "mature" (which actually clears the "larval" flag), and things continue to work as normal. While here, gather all the code that gets a descriptor from the table into a fd_getfile() function, and call it, rather than having the same (sometimes incorrect) code copied all over the place.
794 lines
19 KiB
C
794 lines
19 KiB
C
/* $NetBSD: netbsd32_fs.c,v 1.6 2001/06/14 20:32:44 thorpej Exp $ */
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/*
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* Copyright (c) 1998, 2001 Matthew R. Green
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(_KERNEL_OPT)
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#include "opt_ktrace.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/ktrace.h>
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#include <sys/resourcevar.h>
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#include <sys/vnode.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/namei.h>
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#include <sys/syscallargs.h>
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#include <sys/proc.h>
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#include <compat/netbsd32/netbsd32.h>
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#include <compat/netbsd32/netbsd32_syscallargs.h>
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#include <compat/netbsd32/netbsd32_conv.h>
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static int dofilereadv32 __P((struct proc *, int, struct file *, struct netbsd32_iovec *,
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int, off_t *, int, register_t *));
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static int dofilewritev32 __P((struct proc *, int, struct file *, struct netbsd32_iovec *,
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int, off_t *, int, register_t *));
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static int change_utimes32 __P((struct vnode *, netbsd32_timevalp_t, struct proc *));
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int
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netbsd32_getfsstat(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct netbsd32_getfsstat_args /* {
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syscallarg(netbsd32_statfsp_t) buf;
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syscallarg(netbsd32_long) bufsize;
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syscallarg(int) flags;
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} */ *uap = v;
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struct mount *mp, *nmp;
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struct statfs *sp;
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struct netbsd32_statfs sb32;
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caddr_t sfsp;
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long count, maxcount, error;
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maxcount = SCARG(uap, bufsize) / sizeof(struct netbsd32_statfs);
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sfsp = (caddr_t)(u_long)SCARG(uap, buf);
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simple_lock(&mountlist_slock);
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count = 0;
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for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {
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if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) {
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nmp = mp->mnt_list.cqe_next;
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continue;
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}
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if (sfsp && count < maxcount) {
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sp = &mp->mnt_stat;
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/*
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* If MNT_NOWAIT or MNT_LAZY is specified, do not
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* refresh the fsstat cache. MNT_WAIT or MNT_LAXY
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* overrides MNT_NOWAIT.
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*/
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if (SCARG(uap, flags) != MNT_NOWAIT &&
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SCARG(uap, flags) != MNT_LAZY &&
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(SCARG(uap, flags) == MNT_WAIT ||
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SCARG(uap, flags) == 0) &&
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(error = VFS_STATFS(mp, sp, p)) != 0) {
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simple_lock(&mountlist_slock);
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nmp = mp->mnt_list.cqe_next;
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vfs_unbusy(mp);
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continue;
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}
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sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
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sp->f_oflags = sp->f_flags & 0xffff;
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netbsd32_from_statfs(sp, &sb32);
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error = copyout(&sb32, sfsp, sizeof(sb32));
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if (error) {
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vfs_unbusy(mp);
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return (error);
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}
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sfsp += sizeof(sb32);
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}
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count++;
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simple_lock(&mountlist_slock);
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nmp = mp->mnt_list.cqe_next;
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vfs_unbusy(mp);
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}
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simple_unlock(&mountlist_slock);
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if (sfsp && count > maxcount)
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*retval = maxcount;
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else
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*retval = count;
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return (0);
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}
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int
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netbsd32_readv(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct netbsd32_readv_args /* {
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syscallarg(int) fd;
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syscallarg(const netbsd32_iovecp_t) iovp;
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syscallarg(int) iovcnt;
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} */ *uap = v;
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int fd = SCARG(uap, fd);
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struct file *fp;
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struct filedesc *fdp = p->p_fd;
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if ((fp = fd_getfile(fdp, fd)) == NULL)
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return (EBADF);
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if ((fp->f_flag & FREAD) == 0)
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return (EBADF);
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return (dofilereadv32(p, fd, fp, (struct netbsd32_iovec *)(u_long)SCARG(uap, iovp),
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SCARG(uap, iovcnt), &fp->f_offset, FOF_UPDATE_OFFSET, retval));
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}
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/* Damn thing copies in the iovec! */
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int
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dofilereadv32(p, fd, fp, iovp, iovcnt, offset, flags, retval)
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struct proc *p;
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int fd;
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struct file *fp;
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struct netbsd32_iovec *iovp;
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int iovcnt;
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off_t *offset;
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int flags;
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register_t *retval;
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{
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struct uio auio;
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struct iovec *iov;
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struct iovec *needfree;
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struct iovec aiov[UIO_SMALLIOV];
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long i, cnt, error = 0;
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u_int iovlen;
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#ifdef KTRACE
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struct iovec *ktriov = NULL;
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#endif
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/* note: can't use iovlen until iovcnt is validated */
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iovlen = iovcnt * sizeof(struct iovec);
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if ((u_int)iovcnt > UIO_SMALLIOV) {
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if ((u_int)iovcnt > IOV_MAX)
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return (EINVAL);
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MALLOC(iov, struct iovec *, iovlen, M_IOV, M_WAITOK);
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needfree = iov;
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} else if ((u_int)iovcnt > 0) {
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iov = aiov;
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needfree = NULL;
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} else
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return (EINVAL);
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auio.uio_iov = iov;
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auio.uio_iovcnt = iovcnt;
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auio.uio_rw = UIO_READ;
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auio.uio_segflg = UIO_USERSPACE;
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auio.uio_procp = p;
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error = netbsd32_to_iovecin(iovp, iov, iovcnt);
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if (error)
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goto done;
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auio.uio_resid = 0;
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for (i = 0; i < iovcnt; i++) {
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auio.uio_resid += iov->iov_len;
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/*
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* Reads return ssize_t because -1 is returned on error.
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* Therefore we must restrict the length to SSIZE_MAX to
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* avoid garbage return values.
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*/
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if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) {
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error = EINVAL;
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goto done;
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}
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iov++;
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}
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#ifdef KTRACE
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/*
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* if tracing, save a copy of iovec
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*/
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if (KTRPOINT(p, KTR_GENIO)) {
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MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK);
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memcpy((caddr_t)ktriov, (caddr_t)auio.uio_iov, iovlen);
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}
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#endif
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cnt = auio.uio_resid;
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error = (*fp->f_ops->fo_read)(fp, offset, &auio, fp->f_cred, flags);
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if (error)
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if (auio.uio_resid != cnt && (error == ERESTART ||
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error == EINTR || error == EWOULDBLOCK))
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error = 0;
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cnt -= auio.uio_resid;
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#ifdef KTRACE
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if (KTRPOINT(p, KTR_GENIO))
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if (error == 0) {
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ktrgenio(p, fd, UIO_READ, ktriov, cnt,
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error);
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FREE(ktriov, M_TEMP);
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}
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#endif
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*retval = cnt;
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done:
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if (needfree)
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FREE(needfree, M_IOV);
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return (error);
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}
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int
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netbsd32_writev(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct netbsd32_writev_args /* {
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syscallarg(int) fd;
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syscallarg(const netbsd32_iovecp_t) iovp;
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syscallarg(int) iovcnt;
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} */ *uap = v;
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int fd = SCARG(uap, fd);
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struct file *fp;
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struct filedesc *fdp = p->p_fd;
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if ((fp = fd_getfile(fdp, fd)) == NULL)
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return (EBADF);
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if ((fp->f_flag & FWRITE) == 0)
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return (EBADF);
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return (dofilewritev32(p, fd, fp, (struct netbsd32_iovec *)(u_long)SCARG(uap, iovp),
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SCARG(uap, iovcnt), &fp->f_offset, FOF_UPDATE_OFFSET, retval));
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}
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int
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dofilewritev32(p, fd, fp, iovp, iovcnt, offset, flags, retval)
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struct proc *p;
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int fd;
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struct file *fp;
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struct netbsd32_iovec *iovp;
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int iovcnt;
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off_t *offset;
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int flags;
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register_t *retval;
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{
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struct uio auio;
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struct iovec *iov;
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struct iovec *needfree;
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struct iovec aiov[UIO_SMALLIOV];
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long i, cnt, error = 0;
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u_int iovlen;
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#ifdef KTRACE
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struct iovec *ktriov = NULL;
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#endif
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/* note: can't use iovlen until iovcnt is validated */
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iovlen = iovcnt * sizeof(struct iovec);
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if ((u_int)iovcnt > UIO_SMALLIOV) {
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if ((u_int)iovcnt > IOV_MAX)
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return (EINVAL);
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MALLOC(iov, struct iovec *, iovlen, M_IOV, M_WAITOK);
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needfree = iov;
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} else if ((u_int)iovcnt > 0) {
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iov = aiov;
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needfree = NULL;
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} else
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return (EINVAL);
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auio.uio_iov = iov;
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auio.uio_iovcnt = iovcnt;
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auio.uio_rw = UIO_WRITE;
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auio.uio_segflg = UIO_USERSPACE;
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auio.uio_procp = p;
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error = netbsd32_to_iovecin(iovp, iov, iovcnt);
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if (error)
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goto done;
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auio.uio_resid = 0;
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for (i = 0; i < iovcnt; i++) {
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auio.uio_resid += iov->iov_len;
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/*
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* Writes return ssize_t because -1 is returned on error.
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* Therefore we must restrict the length to SSIZE_MAX to
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* avoid garbage return values.
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*/
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if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) {
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error = EINVAL;
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goto done;
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}
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iov++;
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}
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#ifdef KTRACE
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/*
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* if tracing, save a copy of iovec
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*/
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if (KTRPOINT(p, KTR_GENIO)) {
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MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK);
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memcpy((caddr_t)ktriov, (caddr_t)auio.uio_iov, iovlen);
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}
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#endif
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cnt = auio.uio_resid;
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error = (*fp->f_ops->fo_write)(fp, offset, &auio, fp->f_cred, flags);
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if (error) {
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if (auio.uio_resid != cnt && (error == ERESTART ||
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error == EINTR || error == EWOULDBLOCK))
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error = 0;
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if (error == EPIPE)
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psignal(p, SIGPIPE);
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}
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cnt -= auio.uio_resid;
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#ifdef KTRACE
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if (KTRPOINT(p, KTR_GENIO))
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if (error == 0) {
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ktrgenio(p, fd, UIO_WRITE, ktriov, cnt,
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error);
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FREE(ktriov, M_TEMP);
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}
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#endif
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*retval = cnt;
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done:
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if (needfree)
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FREE(needfree, M_IOV);
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return (error);
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}
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int
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netbsd32_utimes(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct netbsd32_utimes_args /* {
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syscallarg(const netbsd32_charp) path;
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syscallarg(const netbsd32_timevalp_t) tptr;
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} */ *uap = v;
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int error;
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struct nameidata nd;
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NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, (char *)(u_long)SCARG(uap, path), p);
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if ((error = namei(&nd)) != 0)
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return (error);
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error = change_utimes32(nd.ni_vp, SCARG(uap, tptr), p);
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vrele(nd.ni_vp);
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return (error);
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}
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/*
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* Common routine to set access and modification times given a vnode.
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*/
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static int
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change_utimes32(vp, tptr, p)
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struct vnode *vp;
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netbsd32_timevalp_t tptr;
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struct proc *p;
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{
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struct netbsd32_timeval tv32[2];
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struct timeval tv[2];
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struct vattr vattr;
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int error;
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VATTR_NULL(&vattr);
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|
if (tptr == NULL) {
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microtime(&tv[0]);
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tv[1] = tv[0];
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vattr.va_vaflags |= VA_UTIMES_NULL;
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|
} else {
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error = copyin((caddr_t)(u_long)tptr, tv32, sizeof(tv32));
|
|
if (error)
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return (error);
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netbsd32_to_timeval(&tv32[0], &tv[0]);
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|
netbsd32_to_timeval(&tv32[1], &tv[1]);
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|
}
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VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
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vattr.va_atime.tv_sec = tv[0].tv_sec;
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vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000;
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|
vattr.va_mtime.tv_sec = tv[1].tv_sec;
|
|
vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000;
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error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
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|
VOP_UNLOCK(vp, 0);
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|
return (error);
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|
}
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|
|
int
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netbsd32_statfs(p, v, retval)
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struct proc *p;
|
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void *v;
|
|
register_t *retval;
|
|
{
|
|
struct netbsd32_statfs_args /* {
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|
syscallarg(const netbsd32_charp) path;
|
|
syscallarg(netbsd32_statfsp_t) buf;
|
|
} */ *uap = v;
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|
struct mount *mp;
|
|
struct statfs *sp;
|
|
struct netbsd32_statfs s32;
|
|
int error;
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|
struct nameidata nd;
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|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, (char *)(u_long)SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
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|
mp = nd.ni_vp->v_mount;
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|
sp = &mp->mnt_stat;
|
|
vrele(nd.ni_vp);
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|
if ((error = VFS_STATFS(mp, sp, p)) != 0)
|
|
return (error);
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
netbsd32_from_statfs(sp, &s32);
|
|
return (copyout(&s32, (caddr_t)(u_long)SCARG(uap, buf), sizeof(s32)));
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|
}
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|
|
int
|
|
netbsd32_fstatfs(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct netbsd32_fstatfs_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(netbsd32_statfsp_t) buf;
|
|
} */ *uap = v;
|
|
struct file *fp;
|
|
struct mount *mp;
|
|
struct statfs *sp;
|
|
struct netbsd32_statfs s32;
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|
int error;
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|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
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|
mp = ((struct vnode *)fp->f_data)->v_mount;
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|
sp = &mp->mnt_stat;
|
|
if ((error = VFS_STATFS(mp, sp, p)) != 0)
|
|
goto out;
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
netbsd32_from_statfs(sp, &s32);
|
|
error = copyout(&s32, (caddr_t)(u_long)SCARG(uap, buf), sizeof(s32));
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
netbsd32_futimes(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct netbsd32_futimes_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(const netbsd32_timevalp_t) tptr;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct file *fp;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
|
|
error = change_utimes32((struct vnode *)fp->f_data,
|
|
SCARG(uap, tptr), p);
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
netbsd32_getdents(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct netbsd32_getdents_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(netbsd32_charp) buf;
|
|
syscallarg(netbsd32_size_t) count;
|
|
} */ *uap = v;
|
|
struct file *fp;
|
|
int error, done;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
error = vn_readdir(fp, (caddr_t)(u_long)SCARG(uap, buf), UIO_USERSPACE,
|
|
SCARG(uap, count), &done, p, 0, 0);
|
|
*retval = done;
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
netbsd32_lutimes(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct netbsd32_lutimes_args /* {
|
|
syscallarg(const netbsd32_charp) path;
|
|
syscallarg(const netbsd32_timevalp_t) tptr;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, (caddr_t)(u_long)SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
|
|
error = change_utimes32(nd.ni_vp, SCARG(uap, tptr), p);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
netbsd32___stat13(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct netbsd32___stat13_args /* {
|
|
syscallarg(const netbsd32_charp) path;
|
|
syscallarg(netbsd32_statp_t) ub;
|
|
} */ *uap = v;
|
|
struct netbsd32_stat sb32;
|
|
struct stat sb;
|
|
int error;
|
|
struct nameidata nd;
|
|
caddr_t sg;
|
|
const char *path;
|
|
|
|
path = (char *)(u_long)SCARG(uap, path);
|
|
sg = stackgap_init(p->p_emul);
|
|
CHECK_ALT_EXIST(p, &sg, path);
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, path, p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, p);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
netbsd32_from___stat13(&sb, &sb32);
|
|
error = copyout(&sb32, (caddr_t)(u_long)SCARG(uap, ub), sizeof(sb32));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
netbsd32___fstat13(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct netbsd32___fstat13_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(netbsd32_statp_t) sb;
|
|
} */ *uap = v;
|
|
int fd = SCARG(uap, fd);
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct netbsd32_stat sb32;
|
|
struct stat ub;
|
|
int error = 0;
|
|
|
|
if ((fp = fd_getfile(fdp, fd)) == NULL)
|
|
return (EBADF);
|
|
|
|
FILE_USE(fp);
|
|
error = (*fp->f_ops->fo_stat)(fp, &ub, p);
|
|
FILE_UNUSE(fp, p);
|
|
|
|
if (error == 0) {
|
|
netbsd32_from___stat13(&ub, &sb32);
|
|
error = copyout(&sb32, (caddr_t)(u_long)SCARG(uap, sb), sizeof(sb32));
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
netbsd32___lstat13(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct netbsd32___lstat13_args /* {
|
|
syscallarg(const netbsd32_charp) path;
|
|
syscallarg(netbsd32_statp_t) ub;
|
|
} */ *uap = v;
|
|
struct netbsd32_stat sb32;
|
|
struct stat sb;
|
|
int error;
|
|
struct nameidata nd;
|
|
caddr_t sg;
|
|
const char *path;
|
|
|
|
path = (char *)(u_long)SCARG(uap, path);
|
|
sg = stackgap_init(p->p_emul);
|
|
CHECK_ALT_EXIST(p, &sg, path);
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, path, p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, p);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
netbsd32_from___stat13(&sb, &sb32);
|
|
error = copyout(&sb32, (caddr_t)(u_long)SCARG(uap, ub), sizeof(sb32));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
netbsd32_preadv(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct netbsd32_preadv_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(const netbsd32_iovecp_t) iovp;
|
|
syscallarg(int) iovcnt;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) offset;
|
|
} */ *uap = v;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
off_t offset;
|
|
int error, fd = SCARG(uap, fd);
|
|
|
|
if ((fp = fd_getfile(fdp, fd)) == NULL)
|
|
return (EBADF);
|
|
|
|
if ((fp->f_flag & FREAD) == 0)
|
|
return (EBADF);
|
|
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (fp->f_type != DTYPE_VNODE
|
|
|| vp->v_type == VFIFO)
|
|
return (ESPIPE);
|
|
|
|
offset = SCARG(uap, offset);
|
|
|
|
/*
|
|
* XXX This works because no file systems actually
|
|
* XXX take any action on the seek operation.
|
|
*/
|
|
if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0)
|
|
return (error);
|
|
|
|
return (dofilereadv32(p, fd, fp, (struct netbsd32_iovec *)(u_long)SCARG(uap, iovp), SCARG(uap, iovcnt),
|
|
&offset, 0, retval));
|
|
}
|
|
|
|
int
|
|
netbsd32_pwritev(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct netbsd32_pwritev_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(const netbsd32_iovecp_t) iovp;
|
|
syscallarg(int) iovcnt;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) offset;
|
|
} */ *uap = v;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
off_t offset;
|
|
int error, fd = SCARG(uap, fd);
|
|
|
|
if ((fp = fd_getfile(fdp, fd)) == NULL)
|
|
return (EBADF);
|
|
|
|
if ((fp->f_flag & FWRITE) == 0)
|
|
return (EBADF);
|
|
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (fp->f_type != DTYPE_VNODE
|
|
|| vp->v_type == VFIFO)
|
|
return (ESPIPE);
|
|
|
|
offset = SCARG(uap, offset);
|
|
|
|
/*
|
|
* XXX This works because no file systems actually
|
|
* XXX take any action on the seek operation.
|
|
*/
|
|
if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0)
|
|
return (error);
|
|
|
|
return (dofilewritev32(p, fd, fp, (struct netbsd32_iovec *)(u_long)SCARG(uap, iovp), SCARG(uap, iovcnt),
|
|
&offset, 0, retval));
|
|
}
|
|
|
|
/*
|
|
* Find pathname of process's current directory.
|
|
*
|
|
* Use vfs vnode-to-name reverse cache; if that fails, fall back
|
|
* to reading directory contents.
|
|
*/
|
|
int
|
|
getcwd_common __P((struct vnode *, struct vnode *,
|
|
char **, char *, int, int, struct proc *));
|
|
|
|
int netbsd32___getcwd(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct netbsd32___getcwd_args /* {
|
|
syscallarg(char *) bufp;
|
|
syscallarg(size_t) length;
|
|
} */ *uap = v;
|
|
|
|
int error;
|
|
char *path;
|
|
char *bp, *bend;
|
|
int len = (int)SCARG(uap, length);
|
|
int lenused;
|
|
|
|
if (len > MAXPATHLEN*4)
|
|
len = MAXPATHLEN*4;
|
|
else if (len < 2)
|
|
return ERANGE;
|
|
|
|
path = (char *)malloc(len, M_TEMP, M_WAITOK);
|
|
if (!path)
|
|
return ENOMEM;
|
|
|
|
bp = &path[len];
|
|
bend = bp;
|
|
*(--bp) = '\0';
|
|
|
|
/*
|
|
* 5th argument here is "max number of vnodes to traverse".
|
|
* Since each entry takes up at least 2 bytes in the output buffer,
|
|
* limit it to N/2 vnodes for an N byte buffer.
|
|
*/
|
|
#define GETCWD_CHECK_ACCESS 0x0001
|
|
error = getcwd_common (p->p_cwdi->cwdi_cdir, NULL, &bp, path, len/2,
|
|
GETCWD_CHECK_ACCESS, p);
|
|
|
|
if (error)
|
|
goto out;
|
|
lenused = bend - bp;
|
|
*retval = lenused;
|
|
/* put the result into user buffer */
|
|
error = copyout(bp, (caddr_t)(u_long)SCARG(uap, bufp), lenused);
|
|
|
|
out:
|
|
free(path, M_TEMP);
|
|
return error;
|
|
}
|