782cc51566
declaration.
4670 lines
97 KiB
C
4670 lines
97 KiB
C
/*-
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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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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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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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* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_capsicum.h"
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#include "opt_compat.h"
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#include "opt_ktrace.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/capsicum.h>
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#include <sys/disk.h>
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#include <sys/sysent.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/mutex.h>
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#include <sys/sysproto.h>
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#include <sys/namei.h>
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#include <sys/filedesc.h>
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#include <sys/kernel.h>
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#include <sys/fcntl.h>
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#include <sys/file.h>
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#include <sys/filio.h>
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#include <sys/limits.h>
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#include <sys/linker.h>
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#include <sys/rwlock.h>
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#include <sys/sdt.h>
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#include <sys/stat.h>
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#include <sys/sx.h>
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#include <sys/unistd.h>
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#include <sys/vnode.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/dirent.h>
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#include <sys/jail.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysctl.h>
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#ifdef KTRACE
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#include <sys/ktrace.h>
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#endif
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#include <machine/stdarg.h>
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#include <security/audit/audit.h>
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#include <security/mac/mac_framework.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/uma.h>
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#include <ufs/ufs/quota.h>
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MALLOC_DEFINE(M_FADVISE, "fadvise", "posix_fadvise(2) information");
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SDT_PROVIDER_DEFINE(vfs);
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SDT_PROBE_DEFINE2(vfs, , stat, mode, "char *", "int");
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SDT_PROBE_DEFINE2(vfs, , stat, reg, "char *", "int");
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static int kern_chflagsat(struct thread *td, int fd, const char *path,
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enum uio_seg pathseg, u_long flags, int atflag);
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static int setfflags(struct thread *td, struct vnode *, u_long);
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static int getutimes(const struct timeval *, enum uio_seg, struct timespec *);
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static int getutimens(const struct timespec *, enum uio_seg,
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struct timespec *, int *);
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static int setutimes(struct thread *td, struct vnode *,
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const struct timespec *, int, int);
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static int vn_access(struct vnode *vp, int user_flags, struct ucred *cred,
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struct thread *td);
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/*
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* The module initialization routine for POSIX asynchronous I/O will
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* set this to the version of AIO that it implements. (Zero means
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* that it is not implemented.) This value is used here by pathconf()
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* and in kern_descrip.c by fpathconf().
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*/
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int async_io_version;
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/*
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* Sync each mounted filesystem.
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*/
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#ifndef _SYS_SYSPROTO_H_
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struct sync_args {
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int dummy;
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};
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#endif
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/* ARGSUSED */
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int
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sys_sync(td, uap)
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struct thread *td;
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struct sync_args *uap;
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{
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struct mount *mp, *nmp;
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int save;
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mtx_lock(&mountlist_mtx);
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for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) {
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if (vfs_busy(mp, MBF_NOWAIT | MBF_MNTLSTLOCK)) {
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nmp = TAILQ_NEXT(mp, mnt_list);
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continue;
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}
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if ((mp->mnt_flag & MNT_RDONLY) == 0 &&
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vn_start_write(NULL, &mp, V_NOWAIT) == 0) {
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save = curthread_pflags_set(TDP_SYNCIO);
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vfs_msync(mp, MNT_NOWAIT);
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VFS_SYNC(mp, MNT_NOWAIT);
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curthread_pflags_restore(save);
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vn_finished_write(mp);
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}
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mtx_lock(&mountlist_mtx);
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nmp = TAILQ_NEXT(mp, mnt_list);
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vfs_unbusy(mp);
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}
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mtx_unlock(&mountlist_mtx);
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return (0);
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}
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/*
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* Change filesystem quotas.
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*/
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#ifndef _SYS_SYSPROTO_H_
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struct quotactl_args {
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char *path;
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int cmd;
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int uid;
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caddr_t arg;
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};
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#endif
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int
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sys_quotactl(td, uap)
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struct thread *td;
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register struct quotactl_args /* {
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char *path;
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int cmd;
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int uid;
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caddr_t arg;
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} */ *uap;
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{
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struct mount *mp;
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struct nameidata nd;
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int error;
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AUDIT_ARG_CMD(uap->cmd);
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AUDIT_ARG_UID(uap->uid);
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if (!prison_allow(td->td_ucred, PR_ALLOW_QUOTAS))
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return (EPERM);
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNODE1, UIO_USERSPACE,
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uap->path, td);
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if ((error = namei(&nd)) != 0)
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return (error);
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NDFREE(&nd, NDF_ONLY_PNBUF);
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mp = nd.ni_vp->v_mount;
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vfs_ref(mp);
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vput(nd.ni_vp);
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error = vfs_busy(mp, 0);
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vfs_rel(mp);
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if (error != 0)
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return (error);
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error = VFS_QUOTACTL(mp, uap->cmd, uap->uid, uap->arg);
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/*
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* Since quota on operation typically needs to open quota
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* file, the Q_QUOTAON handler needs to unbusy the mount point
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* before calling into namei. Otherwise, unmount might be
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* started between two vfs_busy() invocations (first is our,
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* second is from mount point cross-walk code in lookup()),
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* causing deadlock.
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*
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* Require that Q_QUOTAON handles the vfs_busy() reference on
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* its own, always returning with ubusied mount point.
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*/
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if ((uap->cmd >> SUBCMDSHIFT) != Q_QUOTAON)
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vfs_unbusy(mp);
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return (error);
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}
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/*
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* Used by statfs conversion routines to scale the block size up if
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* necessary so that all of the block counts are <= 'max_size'. Note
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* that 'max_size' should be a bitmask, i.e. 2^n - 1 for some non-zero
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* value of 'n'.
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*/
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void
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statfs_scale_blocks(struct statfs *sf, long max_size)
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{
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uint64_t count;
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int shift;
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KASSERT(powerof2(max_size + 1), ("%s: invalid max_size", __func__));
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/*
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* Attempt to scale the block counts to give a more accurate
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* overview to userland of the ratio of free space to used
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* space. To do this, find the largest block count and compute
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* a divisor that lets it fit into a signed integer <= max_size.
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*/
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if (sf->f_bavail < 0)
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count = -sf->f_bavail;
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else
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count = sf->f_bavail;
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count = MAX(sf->f_blocks, MAX(sf->f_bfree, count));
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if (count <= max_size)
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return;
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count >>= flsl(max_size);
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shift = 0;
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while (count > 0) {
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shift++;
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count >>=1;
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}
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sf->f_bsize <<= shift;
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sf->f_blocks >>= shift;
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sf->f_bfree >>= shift;
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sf->f_bavail >>= shift;
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}
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/*
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* Get filesystem statistics.
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*/
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#ifndef _SYS_SYSPROTO_H_
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struct statfs_args {
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char *path;
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struct statfs *buf;
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};
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#endif
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int
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sys_statfs(td, uap)
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struct thread *td;
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register struct statfs_args /* {
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char *path;
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struct statfs *buf;
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} */ *uap;
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{
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struct statfs sf;
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int error;
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error = kern_statfs(td, uap->path, UIO_USERSPACE, &sf);
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if (error == 0)
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error = copyout(&sf, uap->buf, sizeof(sf));
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return (error);
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}
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int
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kern_statfs(struct thread *td, char *path, enum uio_seg pathseg,
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struct statfs *buf)
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{
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struct mount *mp;
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struct statfs *sp, sb;
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struct nameidata nd;
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int error;
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1,
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pathseg, path, td);
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error = namei(&nd);
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if (error != 0)
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return (error);
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mp = nd.ni_vp->v_mount;
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vfs_ref(mp);
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NDFREE(&nd, NDF_ONLY_PNBUF);
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vput(nd.ni_vp);
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error = vfs_busy(mp, 0);
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vfs_rel(mp);
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if (error != 0)
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return (error);
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#ifdef MAC
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error = mac_mount_check_stat(td->td_ucred, mp);
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if (error != 0)
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goto out;
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#endif
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/*
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* Set these in case the underlying filesystem fails to do so.
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*/
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sp = &mp->mnt_stat;
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sp->f_version = STATFS_VERSION;
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sp->f_namemax = NAME_MAX;
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sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
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error = VFS_STATFS(mp, sp);
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if (error != 0)
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goto out;
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if (priv_check(td, PRIV_VFS_GENERATION)) {
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bcopy(sp, &sb, sizeof(sb));
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sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
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prison_enforce_statfs(td->td_ucred, mp, &sb);
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sp = &sb;
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}
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*buf = *sp;
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out:
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vfs_unbusy(mp);
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return (error);
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}
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/*
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* Get filesystem statistics.
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*/
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#ifndef _SYS_SYSPROTO_H_
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struct fstatfs_args {
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int fd;
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struct statfs *buf;
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};
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#endif
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int
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sys_fstatfs(td, uap)
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struct thread *td;
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register struct fstatfs_args /* {
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int fd;
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struct statfs *buf;
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} */ *uap;
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{
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struct statfs sf;
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int error;
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error = kern_fstatfs(td, uap->fd, &sf);
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if (error == 0)
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error = copyout(&sf, uap->buf, sizeof(sf));
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return (error);
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}
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int
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kern_fstatfs(struct thread *td, int fd, struct statfs *buf)
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{
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struct file *fp;
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struct mount *mp;
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struct statfs *sp, sb;
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struct vnode *vp;
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cap_rights_t rights;
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int error;
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AUDIT_ARG_FD(fd);
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error = getvnode(td, fd, cap_rights_init(&rights, CAP_FSTATFS), &fp);
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if (error != 0)
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return (error);
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vp = fp->f_vnode;
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vn_lock(vp, LK_SHARED | LK_RETRY);
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#ifdef AUDIT
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AUDIT_ARG_VNODE1(vp);
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#endif
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mp = vp->v_mount;
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if (mp)
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vfs_ref(mp);
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VOP_UNLOCK(vp, 0);
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fdrop(fp, td);
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if (mp == NULL) {
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error = EBADF;
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goto out;
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}
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error = vfs_busy(mp, 0);
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vfs_rel(mp);
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if (error != 0)
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return (error);
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#ifdef MAC
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error = mac_mount_check_stat(td->td_ucred, mp);
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if (error != 0)
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goto out;
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#endif
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/*
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* Set these in case the underlying filesystem fails to do so.
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*/
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sp = &mp->mnt_stat;
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sp->f_version = STATFS_VERSION;
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sp->f_namemax = NAME_MAX;
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sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
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error = VFS_STATFS(mp, sp);
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if (error != 0)
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goto out;
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if (priv_check(td, PRIV_VFS_GENERATION)) {
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bcopy(sp, &sb, sizeof(sb));
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sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
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prison_enforce_statfs(td->td_ucred, mp, &sb);
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sp = &sb;
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}
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*buf = *sp;
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out:
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if (mp)
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vfs_unbusy(mp);
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return (error);
|
|
}
|
|
|
|
/*
|
|
* Get statistics on all filesystems.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getfsstat_args {
|
|
struct statfs *buf;
|
|
long bufsize;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
sys_getfsstat(td, uap)
|
|
struct thread *td;
|
|
register struct getfsstat_args /* {
|
|
struct statfs *buf;
|
|
long bufsize;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
size_t count;
|
|
int error;
|
|
|
|
error = kern_getfsstat(td, &uap->buf, uap->bufsize, &count,
|
|
UIO_USERSPACE, uap->flags);
|
|
if (error == 0)
|
|
td->td_retval[0] = count;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* If (bufsize > 0 && bufseg == UIO_SYSSPACE)
|
|
* The caller is responsible for freeing memory which will be allocated
|
|
* in '*buf'.
|
|
*/
|
|
int
|
|
kern_getfsstat(struct thread *td, struct statfs **buf, size_t bufsize,
|
|
size_t *countp, enum uio_seg bufseg, int flags)
|
|
{
|
|
struct mount *mp, *nmp;
|
|
struct statfs *sfsp, *sp, sb;
|
|
size_t count, maxcount;
|
|
int error;
|
|
|
|
maxcount = bufsize / sizeof(struct statfs);
|
|
if (bufsize == 0)
|
|
sfsp = NULL;
|
|
else if (bufseg == UIO_USERSPACE)
|
|
sfsp = *buf;
|
|
else /* if (bufseg == UIO_SYSSPACE) */ {
|
|
count = 0;
|
|
mtx_lock(&mountlist_mtx);
|
|
TAILQ_FOREACH(mp, &mountlist, mnt_list) {
|
|
count++;
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
if (maxcount > count)
|
|
maxcount = count;
|
|
sfsp = *buf = malloc(maxcount * sizeof(struct statfs), M_TEMP,
|
|
M_WAITOK);
|
|
}
|
|
count = 0;
|
|
mtx_lock(&mountlist_mtx);
|
|
for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) {
|
|
if (prison_canseemount(td->td_ucred, mp) != 0) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
#ifdef MAC
|
|
if (mac_mount_check_stat(td->td_ucred, mp) != 0) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
#endif
|
|
if (vfs_busy(mp, MBF_NOWAIT | MBF_MNTLSTLOCK)) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
if (sfsp && count < maxcount) {
|
|
sp = &mp->mnt_stat;
|
|
/*
|
|
* Set these in case the underlying filesystem
|
|
* fails to do so.
|
|
*/
|
|
sp->f_version = STATFS_VERSION;
|
|
sp->f_namemax = NAME_MAX;
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
/*
|
|
* If MNT_NOWAIT or MNT_LAZY is specified, do not
|
|
* refresh the fsstat cache. MNT_NOWAIT or MNT_LAZY
|
|
* overrides MNT_WAIT.
|
|
*/
|
|
if (((flags & (MNT_LAZY|MNT_NOWAIT)) == 0 ||
|
|
(flags & MNT_WAIT)) &&
|
|
(error = VFS_STATFS(mp, sp))) {
|
|
mtx_lock(&mountlist_mtx);
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
vfs_unbusy(mp);
|
|
continue;
|
|
}
|
|
if (priv_check(td, PRIV_VFS_GENERATION)) {
|
|
bcopy(sp, &sb, sizeof(sb));
|
|
sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
|
|
prison_enforce_statfs(td->td_ucred, mp, &sb);
|
|
sp = &sb;
|
|
}
|
|
if (bufseg == UIO_SYSSPACE)
|
|
bcopy(sp, sfsp, sizeof(*sp));
|
|
else /* if (bufseg == UIO_USERSPACE) */ {
|
|
error = copyout(sp, sfsp, sizeof(*sp));
|
|
if (error != 0) {
|
|
vfs_unbusy(mp);
|
|
return (error);
|
|
}
|
|
}
|
|
sfsp++;
|
|
}
|
|
count++;
|
|
mtx_lock(&mountlist_mtx);
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
vfs_unbusy(mp);
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
if (sfsp && count > maxcount)
|
|
*countp = maxcount;
|
|
else
|
|
*countp = count;
|
|
return (0);
|
|
}
|
|
|
|
#ifdef COMPAT_FREEBSD4
|
|
/*
|
|
* Get old format filesystem statistics.
|
|
*/
|
|
static void cvtstatfs(struct statfs *, struct ostatfs *);
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd4_statfs_args {
|
|
char *path;
|
|
struct ostatfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd4_statfs(td, uap)
|
|
struct thread *td;
|
|
struct freebsd4_statfs_args /* {
|
|
char *path;
|
|
struct ostatfs *buf;
|
|
} */ *uap;
|
|
{
|
|
struct ostatfs osb;
|
|
struct statfs sf;
|
|
int error;
|
|
|
|
error = kern_statfs(td, uap->path, UIO_USERSPACE, &sf);
|
|
if (error != 0)
|
|
return (error);
|
|
cvtstatfs(&sf, &osb);
|
|
return (copyout(&osb, uap->buf, sizeof(osb)));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd4_fstatfs_args {
|
|
int fd;
|
|
struct ostatfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd4_fstatfs(td, uap)
|
|
struct thread *td;
|
|
struct freebsd4_fstatfs_args /* {
|
|
int fd;
|
|
struct ostatfs *buf;
|
|
} */ *uap;
|
|
{
|
|
struct ostatfs osb;
|
|
struct statfs sf;
|
|
int error;
|
|
|
|
error = kern_fstatfs(td, uap->fd, &sf);
|
|
if (error != 0)
|
|
return (error);
|
|
cvtstatfs(&sf, &osb);
|
|
return (copyout(&osb, uap->buf, sizeof(osb)));
|
|
}
|
|
|
|
/*
|
|
* Get statistics on all filesystems.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd4_getfsstat_args {
|
|
struct ostatfs *buf;
|
|
long bufsize;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd4_getfsstat(td, uap)
|
|
struct thread *td;
|
|
register struct freebsd4_getfsstat_args /* {
|
|
struct ostatfs *buf;
|
|
long bufsize;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct statfs *buf, *sp;
|
|
struct ostatfs osb;
|
|
size_t count, size;
|
|
int error;
|
|
|
|
count = uap->bufsize / sizeof(struct ostatfs);
|
|
size = count * sizeof(struct statfs);
|
|
error = kern_getfsstat(td, &buf, size, &count, UIO_SYSSPACE,
|
|
uap->flags);
|
|
if (size > 0) {
|
|
sp = buf;
|
|
while (count > 0 && error == 0) {
|
|
cvtstatfs(sp, &osb);
|
|
error = copyout(&osb, uap->buf, sizeof(osb));
|
|
sp++;
|
|
uap->buf++;
|
|
count--;
|
|
}
|
|
free(buf, M_TEMP);
|
|
}
|
|
if (error == 0)
|
|
td->td_retval[0] = count;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Implement fstatfs() for (NFS) file handles.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd4_fhstatfs_args {
|
|
struct fhandle *u_fhp;
|
|
struct ostatfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd4_fhstatfs(td, uap)
|
|
struct thread *td;
|
|
struct freebsd4_fhstatfs_args /* {
|
|
struct fhandle *u_fhp;
|
|
struct ostatfs *buf;
|
|
} */ *uap;
|
|
{
|
|
struct ostatfs osb;
|
|
struct statfs sf;
|
|
fhandle_t fh;
|
|
int error;
|
|
|
|
error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t));
|
|
if (error != 0)
|
|
return (error);
|
|
error = kern_fhstatfs(td, fh, &sf);
|
|
if (error != 0)
|
|
return (error);
|
|
cvtstatfs(&sf, &osb);
|
|
return (copyout(&osb, uap->buf, sizeof(osb)));
|
|
}
|
|
|
|
/*
|
|
* Convert a new format statfs structure to an old format statfs structure.
|
|
*/
|
|
static void
|
|
cvtstatfs(nsp, osp)
|
|
struct statfs *nsp;
|
|
struct ostatfs *osp;
|
|
{
|
|
|
|
statfs_scale_blocks(nsp, LONG_MAX);
|
|
bzero(osp, sizeof(*osp));
|
|
osp->f_bsize = nsp->f_bsize;
|
|
osp->f_iosize = MIN(nsp->f_iosize, LONG_MAX);
|
|
osp->f_blocks = nsp->f_blocks;
|
|
osp->f_bfree = nsp->f_bfree;
|
|
osp->f_bavail = nsp->f_bavail;
|
|
osp->f_files = MIN(nsp->f_files, LONG_MAX);
|
|
osp->f_ffree = MIN(nsp->f_ffree, LONG_MAX);
|
|
osp->f_owner = nsp->f_owner;
|
|
osp->f_type = nsp->f_type;
|
|
osp->f_flags = nsp->f_flags;
|
|
osp->f_syncwrites = MIN(nsp->f_syncwrites, LONG_MAX);
|
|
osp->f_asyncwrites = MIN(nsp->f_asyncwrites, LONG_MAX);
|
|
osp->f_syncreads = MIN(nsp->f_syncreads, LONG_MAX);
|
|
osp->f_asyncreads = MIN(nsp->f_asyncreads, LONG_MAX);
|
|
strlcpy(osp->f_fstypename, nsp->f_fstypename,
|
|
MIN(MFSNAMELEN, OMFSNAMELEN));
|
|
strlcpy(osp->f_mntonname, nsp->f_mntonname,
|
|
MIN(MNAMELEN, OMNAMELEN));
|
|
strlcpy(osp->f_mntfromname, nsp->f_mntfromname,
|
|
MIN(MNAMELEN, OMNAMELEN));
|
|
osp->f_fsid = nsp->f_fsid;
|
|
}
|
|
#endif /* COMPAT_FREEBSD4 */
|
|
|
|
/*
|
|
* Change current working directory to a given file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchdir_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fchdir(td, uap)
|
|
struct thread *td;
|
|
struct fchdir_args /* {
|
|
int fd;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp, *tdp;
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
error = getvnode(td, uap->fd, cap_rights_init(&rights, CAP_FCHDIR),
|
|
&fp);
|
|
if (error != 0)
|
|
return (error);
|
|
vp = fp->f_vnode;
|
|
VREF(vp);
|
|
fdrop(fp, td);
|
|
vn_lock(vp, LK_SHARED | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(vp);
|
|
error = change_dir(vp, td);
|
|
while (!error && (mp = vp->v_mountedhere) != NULL) {
|
|
if (vfs_busy(mp, 0))
|
|
continue;
|
|
error = VFS_ROOT(mp, LK_SHARED, &tdp);
|
|
vfs_unbusy(mp);
|
|
if (error != 0)
|
|
break;
|
|
vput(vp);
|
|
vp = tdp;
|
|
}
|
|
if (error != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
pwd_chdir(td, vp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory (``.'').
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
sys_chdir(td, uap)
|
|
struct thread *td;
|
|
struct chdir_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_chdir(td, uap->path, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_chdir(struct thread *td, char *path, enum uio_seg pathseg)
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
if ((error = change_dir(nd.ni_vp, td)) != 0) {
|
|
vput(nd.ni_vp);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(nd.ni_vp, 0);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
pwd_chdir(td, nd.ni_vp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change notion of root (``/'') directory.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chroot_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
sys_chroot(td, uap)
|
|
struct thread *td;
|
|
struct chroot_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
error = priv_check(td, PRIV_VFS_CHROOT);
|
|
if (error != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1,
|
|
UIO_USERSPACE, uap->path, td);
|
|
error = namei(&nd);
|
|
if (error != 0)
|
|
goto error;
|
|
error = change_dir(nd.ni_vp, td);
|
|
if (error != 0)
|
|
goto e_vunlock;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_chroot(td->td_ucred, nd.ni_vp);
|
|
if (error != 0)
|
|
goto e_vunlock;
|
|
#endif
|
|
VOP_UNLOCK(nd.ni_vp, 0);
|
|
error = pwd_chroot(td, nd.ni_vp);
|
|
vrele(nd.ni_vp);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
return (error);
|
|
e_vunlock:
|
|
vput(nd.ni_vp);
|
|
error:
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common routine for chroot and chdir. Callers must provide a locked vnode
|
|
* instance.
|
|
*/
|
|
int
|
|
change_dir(vp, td)
|
|
struct vnode *vp;
|
|
struct thread *td;
|
|
{
|
|
#ifdef MAC
|
|
int error;
|
|
#endif
|
|
|
|
ASSERT_VOP_LOCKED(vp, "change_dir(): vp not locked");
|
|
if (vp->v_type != VDIR)
|
|
return (ENOTDIR);
|
|
#ifdef MAC
|
|
error = mac_vnode_check_chdir(td->td_ucred, vp);
|
|
if (error != 0)
|
|
return (error);
|
|
#endif
|
|
return (VOP_ACCESS(vp, VEXEC, td->td_ucred, td));
|
|
}
|
|
|
|
static __inline void
|
|
flags_to_rights(int flags, cap_rights_t *rightsp)
|
|
{
|
|
|
|
if (flags & O_EXEC) {
|
|
cap_rights_set(rightsp, CAP_FEXECVE);
|
|
} else {
|
|
switch ((flags & O_ACCMODE)) {
|
|
case O_RDONLY:
|
|
cap_rights_set(rightsp, CAP_READ);
|
|
break;
|
|
case O_RDWR:
|
|
cap_rights_set(rightsp, CAP_READ);
|
|
/* FALLTHROUGH */
|
|
case O_WRONLY:
|
|
cap_rights_set(rightsp, CAP_WRITE);
|
|
if (!(flags & (O_APPEND | O_TRUNC)))
|
|
cap_rights_set(rightsp, CAP_SEEK);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (flags & O_CREAT)
|
|
cap_rights_set(rightsp, CAP_CREATE);
|
|
|
|
if (flags & O_TRUNC)
|
|
cap_rights_set(rightsp, CAP_FTRUNCATE);
|
|
|
|
if (flags & (O_SYNC | O_FSYNC))
|
|
cap_rights_set(rightsp, CAP_FSYNC);
|
|
|
|
if (flags & (O_EXLOCK | O_SHLOCK))
|
|
cap_rights_set(rightsp, CAP_FLOCK);
|
|
}
|
|
|
|
/*
|
|
* Check permissions, allocate an open file structure, and call the device
|
|
* open routine if any.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct open_args {
|
|
char *path;
|
|
int flags;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_open(td, uap)
|
|
struct thread *td;
|
|
register struct open_args /* {
|
|
char *path;
|
|
int flags;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_openat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->flags, uap->mode));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct openat_args {
|
|
int fd;
|
|
char *path;
|
|
int flag;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_openat(struct thread *td, struct openat_args *uap)
|
|
{
|
|
|
|
return (kern_openat(td, uap->fd, uap->path, UIO_USERSPACE, uap->flag,
|
|
uap->mode));
|
|
}
|
|
|
|
int
|
|
kern_openat(struct thread *td, int fd, char *path, enum uio_seg pathseg,
|
|
int flags, int mode)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int cmode, error, indx;
|
|
|
|
indx = -1;
|
|
|
|
AUDIT_ARG_FFLAGS(flags);
|
|
AUDIT_ARG_MODE(mode);
|
|
/* XXX: audit dirfd */
|
|
cap_rights_init(&rights, CAP_LOOKUP);
|
|
flags_to_rights(flags, &rights);
|
|
/*
|
|
* Only one of the O_EXEC, O_RDONLY, O_WRONLY and O_RDWR flags
|
|
* may be specified.
|
|
*/
|
|
if (flags & O_EXEC) {
|
|
if (flags & O_ACCMODE)
|
|
return (EINVAL);
|
|
} else if ((flags & O_ACCMODE) == O_ACCMODE) {
|
|
return (EINVAL);
|
|
} else {
|
|
flags = FFLAGS(flags);
|
|
}
|
|
|
|
/*
|
|
* Allocate the file descriptor, but don't install a descriptor yet.
|
|
*/
|
|
error = falloc_noinstall(td, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
/*
|
|
* An extra reference on `fp' has been held for us by
|
|
* falloc_noinstall().
|
|
*/
|
|
/* Set the flags early so the finit in devfs can pick them up. */
|
|
fp->f_flag = flags & FMASK;
|
|
cmode = ((mode & ~fdp->fd_cmask) & ALLPERMS) & ~S_ISTXT;
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, FOLLOW | AUDITVNODE1, pathseg, path, fd,
|
|
&rights, td);
|
|
td->td_dupfd = -1; /* XXX check for fdopen */
|
|
error = vn_open(&nd, &flags, cmode, fp);
|
|
if (error != 0) {
|
|
/*
|
|
* If the vn_open replaced the method vector, something
|
|
* wonderous happened deep below and we just pass it up
|
|
* pretending we know what we do.
|
|
*/
|
|
if (error == ENXIO && fp->f_ops != &badfileops)
|
|
goto success;
|
|
|
|
/*
|
|
* Handle special fdopen() case. bleh.
|
|
*
|
|
* Don't do this for relative (capability) lookups; we don't
|
|
* understand exactly what would happen, and we don't think
|
|
* that it ever should.
|
|
*/
|
|
if (nd.ni_strictrelative == 0 &&
|
|
(error == ENODEV || error == ENXIO) &&
|
|
td->td_dupfd >= 0) {
|
|
error = dupfdopen(td, fdp, td->td_dupfd, flags, error,
|
|
&indx);
|
|
if (error == 0)
|
|
goto success;
|
|
}
|
|
|
|
goto bad;
|
|
}
|
|
td->td_dupfd = 0;
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
|
|
/*
|
|
* Store the vnode, for any f_type. Typically, the vnode use
|
|
* count is decremented by direct call to vn_closefile() for
|
|
* files that switched type in the cdevsw fdopen() method.
|
|
*/
|
|
fp->f_vnode = vp;
|
|
/*
|
|
* If the file wasn't claimed by devfs bind it to the normal
|
|
* vnode operations here.
|
|
*/
|
|
if (fp->f_ops == &badfileops) {
|
|
KASSERT(vp->v_type != VFIFO, ("Unexpected fifo."));
|
|
fp->f_seqcount = 1;
|
|
finit(fp, (flags & FMASK) | (fp->f_flag & FHASLOCK),
|
|
DTYPE_VNODE, vp, &vnops);
|
|
}
|
|
|
|
VOP_UNLOCK(vp, 0);
|
|
if (flags & O_TRUNC) {
|
|
error = fo_truncate(fp, 0, td->td_ucred, td);
|
|
if (error != 0)
|
|
goto bad;
|
|
}
|
|
success:
|
|
/*
|
|
* If we haven't already installed the FD (for dupfdopen), do so now.
|
|
*/
|
|
if (indx == -1) {
|
|
struct filecaps *fcaps;
|
|
|
|
#ifdef CAPABILITIES
|
|
if (nd.ni_strictrelative == 1)
|
|
fcaps = &nd.ni_filecaps;
|
|
else
|
|
#endif
|
|
fcaps = NULL;
|
|
error = finstall(td, fp, &indx, flags, fcaps);
|
|
/* On success finstall() consumes fcaps. */
|
|
if (error != 0) {
|
|
filecaps_free(&nd.ni_filecaps);
|
|
goto bad;
|
|
}
|
|
} else {
|
|
filecaps_free(&nd.ni_filecaps);
|
|
}
|
|
|
|
/*
|
|
* Release our private reference, leaving the one associated with
|
|
* the descriptor table intact.
|
|
*/
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = indx;
|
|
return (0);
|
|
bad:
|
|
KASSERT(indx == -1, ("indx=%d, should be -1", indx));
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Create a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ocreat_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
ocreat(td, uap)
|
|
struct thread *td;
|
|
register struct ocreat_args /* {
|
|
char *path;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_openat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
O_WRONLY | O_CREAT | O_TRUNC, uap->mode));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Create a special file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mknod_args {
|
|
char *path;
|
|
int mode;
|
|
int dev;
|
|
};
|
|
#endif
|
|
int
|
|
sys_mknod(td, uap)
|
|
struct thread *td;
|
|
register struct mknod_args /* {
|
|
char *path;
|
|
int mode;
|
|
int dev;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_mknodat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->mode, uap->dev));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mknodat_args {
|
|
int fd;
|
|
char *path;
|
|
mode_t mode;
|
|
dev_t dev;
|
|
};
|
|
#endif
|
|
int
|
|
sys_mknodat(struct thread *td, struct mknodat_args *uap)
|
|
{
|
|
|
|
return (kern_mknodat(td, uap->fd, uap->path, UIO_USERSPACE, uap->mode,
|
|
uap->dev));
|
|
}
|
|
|
|
int
|
|
kern_mknodat(struct thread *td, int fd, char *path, enum uio_seg pathseg,
|
|
int mode, int dev)
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int error, whiteout = 0;
|
|
|
|
AUDIT_ARG_MODE(mode);
|
|
AUDIT_ARG_DEV(dev);
|
|
switch (mode & S_IFMT) {
|
|
case S_IFCHR:
|
|
case S_IFBLK:
|
|
error = priv_check(td, PRIV_VFS_MKNOD_DEV);
|
|
break;
|
|
case S_IFMT:
|
|
error = priv_check(td, PRIV_VFS_MKNOD_BAD);
|
|
break;
|
|
case S_IFWHT:
|
|
error = priv_check(td, PRIV_VFS_MKNOD_WHT);
|
|
break;
|
|
case S_IFIFO:
|
|
if (dev == 0)
|
|
return (kern_mkfifoat(td, fd, path, pathseg, mode));
|
|
/* FALLTHROUGH */
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
if (error != 0)
|
|
return (error);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 |
|
|
NOCACHE, pathseg, path, fd, cap_rights_init(&rights, CAP_MKNODAT),
|
|
td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(vp);
|
|
return (EEXIST);
|
|
} else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = (mode & ALLPERMS) &
|
|
~td->td_proc->p_fd->fd_cmask;
|
|
vattr.va_rdev = dev;
|
|
whiteout = 0;
|
|
|
|
switch (mode & S_IFMT) {
|
|
case S_IFMT: /* used by badsect to flag bad sectors */
|
|
vattr.va_type = VBAD;
|
|
break;
|
|
case S_IFCHR:
|
|
vattr.va_type = VCHR;
|
|
break;
|
|
case S_IFBLK:
|
|
vattr.va_type = VBLK;
|
|
break;
|
|
case S_IFWHT:
|
|
whiteout = 1;
|
|
break;
|
|
default:
|
|
panic("kern_mknod: invalid mode");
|
|
}
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
#ifdef MAC
|
|
if (error == 0 && !whiteout)
|
|
error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp,
|
|
&nd.ni_cnd, &vattr);
|
|
#endif
|
|
if (error == 0) {
|
|
if (whiteout)
|
|
error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE);
|
|
else {
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp,
|
|
&nd.ni_cnd, &vattr);
|
|
if (error == 0)
|
|
vput(nd.ni_vp);
|
|
}
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Create a named pipe.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkfifo_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_mkfifo(td, uap)
|
|
struct thread *td;
|
|
register struct mkfifo_args /* {
|
|
char *path;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_mkfifoat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->mode));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkfifoat_args {
|
|
int fd;
|
|
char *path;
|
|
mode_t mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_mkfifoat(struct thread *td, struct mkfifoat_args *uap)
|
|
{
|
|
|
|
return (kern_mkfifoat(td, uap->fd, uap->path, UIO_USERSPACE,
|
|
uap->mode));
|
|
}
|
|
|
|
int
|
|
kern_mkfifoat(struct thread *td, int fd, char *path, enum uio_seg pathseg,
|
|
int mode)
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
AUDIT_ARG_MODE(mode);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 |
|
|
NOCACHE, pathseg, path, fd, cap_rights_init(&rights, CAP_MKFIFOAT),
|
|
td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
if (nd.ni_vp != NULL) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
return (EEXIST);
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VFIFO;
|
|
vattr.va_mode = (mode & ALLPERMS) & ~td->td_proc->p_fd->fd_cmask;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd,
|
|
&vattr);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
if (error == 0)
|
|
vput(nd.ni_vp);
|
|
#ifdef MAC
|
|
out:
|
|
#endif
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a hard file link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct link_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
int
|
|
sys_link(td, uap)
|
|
struct thread *td;
|
|
register struct link_args /* {
|
|
char *path;
|
|
char *link;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_linkat(td, AT_FDCWD, AT_FDCWD, uap->path, uap->link,
|
|
UIO_USERSPACE, FOLLOW));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct linkat_args {
|
|
int fd1;
|
|
char *path1;
|
|
int fd2;
|
|
char *path2;
|
|
int flag;
|
|
};
|
|
#endif
|
|
int
|
|
sys_linkat(struct thread *td, struct linkat_args *uap)
|
|
{
|
|
int flag;
|
|
|
|
flag = uap->flag;
|
|
if (flag & ~AT_SYMLINK_FOLLOW)
|
|
return (EINVAL);
|
|
|
|
return (kern_linkat(td, uap->fd1, uap->fd2, uap->path1, uap->path2,
|
|
UIO_USERSPACE, (flag & AT_SYMLINK_FOLLOW) ? FOLLOW : NOFOLLOW));
|
|
}
|
|
|
|
int hardlink_check_uid = 0;
|
|
SYSCTL_INT(_security_bsd, OID_AUTO, hardlink_check_uid, CTLFLAG_RW,
|
|
&hardlink_check_uid, 0,
|
|
"Unprivileged processes cannot create hard links to files owned by other "
|
|
"users");
|
|
static int hardlink_check_gid = 0;
|
|
SYSCTL_INT(_security_bsd, OID_AUTO, hardlink_check_gid, CTLFLAG_RW,
|
|
&hardlink_check_gid, 0,
|
|
"Unprivileged processes cannot create hard links to files owned by other "
|
|
"groups");
|
|
|
|
static int
|
|
can_hardlink(struct vnode *vp, struct ucred *cred)
|
|
{
|
|
struct vattr va;
|
|
int error;
|
|
|
|
if (!hardlink_check_uid && !hardlink_check_gid)
|
|
return (0);
|
|
|
|
error = VOP_GETATTR(vp, &va, cred);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
if (hardlink_check_uid && cred->cr_uid != va.va_uid) {
|
|
error = priv_check_cred(cred, PRIV_VFS_LINK, 0);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
if (hardlink_check_gid && !groupmember(va.va_gid, cred)) {
|
|
error = priv_check_cred(cred, PRIV_VFS_LINK, 0);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
kern_linkat(struct thread *td, int fd1, int fd2, char *path1, char *path2,
|
|
enum uio_seg segflg, int follow)
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
again:
|
|
bwillwrite();
|
|
NDINIT_AT(&nd, LOOKUP, follow | AUDITVNODE1, segflg, path1, fd1, td);
|
|
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type == VDIR) {
|
|
vrele(vp);
|
|
return (EPERM); /* POSIX */
|
|
}
|
|
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE2 |
|
|
NOCACHE, segflg, path2, fd2, cap_rights_init(&rights, CAP_LINKAT),
|
|
td);
|
|
if ((error = namei(&nd)) == 0) {
|
|
if (nd.ni_vp != NULL) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
vrele(vp);
|
|
return (EEXIST);
|
|
} else if (nd.ni_dvp->v_mount != vp->v_mount) {
|
|
/*
|
|
* Cross-device link. No need to recheck
|
|
* vp->v_type, since it cannot change, except
|
|
* to VBAD.
|
|
*/
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
vrele(vp);
|
|
return (EXDEV);
|
|
} else if ((error = vn_lock(vp, LK_EXCLUSIVE)) == 0) {
|
|
error = can_hardlink(vp, td->td_ucred);
|
|
#ifdef MAC
|
|
if (error == 0)
|
|
error = mac_vnode_check_link(td->td_ucred,
|
|
nd.ni_dvp, vp, &nd.ni_cnd);
|
|
#endif
|
|
if (error != 0) {
|
|
vput(vp);
|
|
vput(nd.ni_dvp);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
return (error);
|
|
}
|
|
error = vn_start_write(vp, &mp, V_NOWAIT);
|
|
if (error != 0) {
|
|
vput(vp);
|
|
vput(nd.ni_dvp);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = vn_start_write(NULL, &mp,
|
|
V_XSLEEP | PCATCH);
|
|
if (error != 0)
|
|
return (error);
|
|
goto again;
|
|
}
|
|
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
VOP_UNLOCK(vp, 0);
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
} else {
|
|
vput(nd.ni_dvp);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vrele(vp);
|
|
goto again;
|
|
}
|
|
}
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct symlink_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
int
|
|
sys_symlink(td, uap)
|
|
struct thread *td;
|
|
register struct symlink_args /* {
|
|
char *path;
|
|
char *link;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_symlinkat(td, uap->path, AT_FDCWD, uap->link,
|
|
UIO_USERSPACE));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct symlinkat_args {
|
|
char *path;
|
|
int fd;
|
|
char *path2;
|
|
};
|
|
#endif
|
|
int
|
|
sys_symlinkat(struct thread *td, struct symlinkat_args *uap)
|
|
{
|
|
|
|
return (kern_symlinkat(td, uap->path1, uap->fd, uap->path2,
|
|
UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_symlinkat(struct thread *td, char *path1, int fd, char *path2,
|
|
enum uio_seg segflg)
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
char *syspath;
|
|
struct nameidata nd;
|
|
int error;
|
|
cap_rights_t rights;
|
|
|
|
if (segflg == UIO_SYSSPACE) {
|
|
syspath = path1;
|
|
} else {
|
|
syspath = uma_zalloc(namei_zone, M_WAITOK);
|
|
if ((error = copyinstr(path1, syspath, MAXPATHLEN, NULL)) != 0)
|
|
goto out;
|
|
}
|
|
AUDIT_ARG_TEXT(syspath);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 |
|
|
NOCACHE, segflg, path2, fd, cap_rights_init(&rights, CAP_SYMLINKAT),
|
|
td);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out;
|
|
if (nd.ni_vp) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
goto out;
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = ACCESSPERMS &~ td->td_proc->p_fd->fd_cmask;
|
|
#ifdef MAC
|
|
vattr.va_type = VLNK;
|
|
error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd,
|
|
&vattr);
|
|
if (error != 0)
|
|
goto out2;
|
|
#endif
|
|
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, syspath);
|
|
if (error == 0)
|
|
vput(nd.ni_vp);
|
|
#ifdef MAC
|
|
out2:
|
|
#endif
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
out:
|
|
if (segflg != UIO_SYSSPACE)
|
|
uma_zfree(namei_zone, syspath);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a whiteout from the filesystem.
|
|
*/
|
|
int
|
|
sys_undelete(td, uap)
|
|
struct thread *td;
|
|
register struct undelete_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, DELETE, LOCKPARENT | DOWHITEOUT | AUDITVNODE1,
|
|
UIO_USERSPACE, uap->path, td);
|
|
error = namei(&nd);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
return (EEXIST);
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a name from the filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unlink_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
sys_unlink(td, uap)
|
|
struct thread *td;
|
|
struct unlink_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_unlinkat(td, AT_FDCWD, uap->path, UIO_USERSPACE, 0));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unlinkat_args {
|
|
int fd;
|
|
char *path;
|
|
int flag;
|
|
};
|
|
#endif
|
|
int
|
|
sys_unlinkat(struct thread *td, struct unlinkat_args *uap)
|
|
{
|
|
int flag = uap->flag;
|
|
int fd = uap->fd;
|
|
char *path = uap->path;
|
|
|
|
if (flag & ~AT_REMOVEDIR)
|
|
return (EINVAL);
|
|
|
|
if (flag & AT_REMOVEDIR)
|
|
return (kern_rmdirat(td, fd, path, UIO_USERSPACE));
|
|
else
|
|
return (kern_unlinkat(td, fd, path, UIO_USERSPACE, 0));
|
|
}
|
|
|
|
int
|
|
kern_unlinkat(struct thread *td, int fd, char *path, enum uio_seg pathseg,
|
|
ino_t oldinum)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct nameidata nd;
|
|
struct stat sb;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, DELETE, LOCKPARENT | LOCKLEAF | AUDITVNODE1,
|
|
pathseg, path, fd, cap_rights_init(&rights, CAP_UNLINKAT), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error == EINVAL ? EPERM : error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type == VDIR && oldinum == 0) {
|
|
error = EPERM; /* POSIX */
|
|
} else if (oldinum != 0 &&
|
|
((error = vn_stat(vp, &sb, td->td_ucred, NOCRED, td)) == 0) &&
|
|
sb.st_ino != oldinum) {
|
|
error = EIDRM; /* Identifier removed */
|
|
} else {
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*
|
|
* XXX: can this only be a VDIR case?
|
|
*/
|
|
if (vp->v_vflag & VV_ROOT)
|
|
error = EBUSY;
|
|
}
|
|
if (error == 0) {
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if (vp == nd.ni_dvp)
|
|
vrele(vp);
|
|
else
|
|
vput(vp);
|
|
if ((error = vn_start_write(NULL, &mp,
|
|
V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_vnode_check_unlink(td->td_ucred, nd.ni_dvp, vp,
|
|
&nd.ni_cnd);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
vfs_notify_upper(vp, VFS_NOTIFY_UPPER_UNLINK);
|
|
error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
#ifdef MAC
|
|
out:
|
|
#endif
|
|
vn_finished_write(mp);
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if (vp == nd.ni_dvp)
|
|
vrele(vp);
|
|
else
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Reposition read/write file offset.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lseek_args {
|
|
int fd;
|
|
int pad;
|
|
off_t offset;
|
|
int whence;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lseek(td, uap)
|
|
struct thread *td;
|
|
register struct lseek_args /* {
|
|
int fd;
|
|
int pad;
|
|
off_t offset;
|
|
int whence;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
error = fget(td, uap->fd, cap_rights_init(&rights, CAP_SEEK), &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
error = (fp->f_ops->fo_flags & DFLAG_SEEKABLE) != 0 ?
|
|
fo_seek(fp, uap->offset, uap->whence, td) : ESPIPE;
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43)
|
|
/*
|
|
* Reposition read/write file offset.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct olseek_args {
|
|
int fd;
|
|
long offset;
|
|
int whence;
|
|
};
|
|
#endif
|
|
int
|
|
olseek(td, uap)
|
|
struct thread *td;
|
|
register struct olseek_args /* {
|
|
int fd;
|
|
long offset;
|
|
int whence;
|
|
} */ *uap;
|
|
{
|
|
struct lseek_args /* {
|
|
int fd;
|
|
int pad;
|
|
off_t offset;
|
|
int whence;
|
|
} */ nuap;
|
|
|
|
nuap.fd = uap->fd;
|
|
nuap.offset = uap->offset;
|
|
nuap.whence = uap->whence;
|
|
return (sys_lseek(td, &nuap));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
#if defined(COMPAT_FREEBSD6)
|
|
/* Version with the 'pad' argument */
|
|
int
|
|
freebsd6_lseek(td, uap)
|
|
struct thread *td;
|
|
register struct freebsd6_lseek_args *uap;
|
|
{
|
|
struct lseek_args ouap;
|
|
|
|
ouap.fd = uap->fd;
|
|
ouap.offset = uap->offset;
|
|
ouap.whence = uap->whence;
|
|
return (sys_lseek(td, &ouap));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Check access permissions using passed credentials.
|
|
*/
|
|
static int
|
|
vn_access(vp, user_flags, cred, td)
|
|
struct vnode *vp;
|
|
int user_flags;
|
|
struct ucred *cred;
|
|
struct thread *td;
|
|
{
|
|
accmode_t accmode;
|
|
int error;
|
|
|
|
/* Flags == 0 means only check for existence. */
|
|
if (user_flags == 0)
|
|
return (0);
|
|
|
|
accmode = 0;
|
|
if (user_flags & R_OK)
|
|
accmode |= VREAD;
|
|
if (user_flags & W_OK)
|
|
accmode |= VWRITE;
|
|
if (user_flags & X_OK)
|
|
accmode |= VEXEC;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_access(cred, vp, accmode);
|
|
if (error != 0)
|
|
return (error);
|
|
#endif
|
|
if ((accmode & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
|
|
error = VOP_ACCESS(vp, accmode, cred, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check access permissions using "real" credentials.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct access_args {
|
|
char *path;
|
|
int amode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_access(td, uap)
|
|
struct thread *td;
|
|
register struct access_args /* {
|
|
char *path;
|
|
int amode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_accessat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
0, uap->amode));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct faccessat_args {
|
|
int dirfd;
|
|
char *path;
|
|
int amode;
|
|
int flag;
|
|
}
|
|
#endif
|
|
int
|
|
sys_faccessat(struct thread *td, struct faccessat_args *uap)
|
|
{
|
|
|
|
return (kern_accessat(td, uap->fd, uap->path, UIO_USERSPACE, uap->flag,
|
|
uap->amode));
|
|
}
|
|
|
|
int
|
|
kern_accessat(struct thread *td, int fd, char *path, enum uio_seg pathseg,
|
|
int flag, int amode)
|
|
{
|
|
struct ucred *cred, *usecred;
|
|
struct vnode *vp;
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
if (flag & ~AT_EACCESS)
|
|
return (EINVAL);
|
|
if (amode != F_OK && (amode & ~(R_OK | W_OK | X_OK)) != 0)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Create and modify a temporary credential instead of one that
|
|
* is potentially shared (if we need one).
|
|
*/
|
|
cred = td->td_ucred;
|
|
if ((flag & AT_EACCESS) == 0 &&
|
|
((cred->cr_uid != cred->cr_ruid ||
|
|
cred->cr_rgid != cred->cr_groups[0]))) {
|
|
usecred = crdup(cred);
|
|
usecred->cr_uid = cred->cr_ruid;
|
|
usecred->cr_groups[0] = cred->cr_rgid;
|
|
td->td_ucred = usecred;
|
|
} else
|
|
usecred = cred;
|
|
AUDIT_ARG_VALUE(amode);
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF |
|
|
AUDITVNODE1, pathseg, path, fd, cap_rights_init(&rights, CAP_FSTAT),
|
|
td);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out;
|
|
vp = nd.ni_vp;
|
|
|
|
error = vn_access(vp, amode, usecred, td);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
out:
|
|
if (usecred != cred) {
|
|
td->td_ucred = cred;
|
|
crfree(usecred);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check access permissions using "effective" credentials.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct eaccess_args {
|
|
char *path;
|
|
int amode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_eaccess(td, uap)
|
|
struct thread *td;
|
|
register struct eaccess_args /* {
|
|
char *path;
|
|
int amode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_accessat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
AT_EACCESS, uap->amode));
|
|
}
|
|
|
|
#if defined(COMPAT_43)
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ostat_args {
|
|
char *path;
|
|
struct ostat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
ostat(td, uap)
|
|
struct thread *td;
|
|
register struct ostat_args /* {
|
|
char *path;
|
|
struct ostat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
|
|
error = kern_statat(td, 0, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
&sb, NULL);
|
|
if (error != 0)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
return (copyout(&osb, uap->ub, sizeof (osb)));
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct olstat_args {
|
|
char *path;
|
|
struct ostat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
olstat(td, uap)
|
|
struct thread *td;
|
|
register struct olstat_args /* {
|
|
char *path;
|
|
struct ostat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
|
|
error = kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, uap->path,
|
|
UIO_USERSPACE, &sb, NULL);
|
|
if (error != 0)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
return (copyout(&osb, uap->ub, sizeof (osb)));
|
|
}
|
|
|
|
/*
|
|
* Convert from an old to a new stat structure.
|
|
*/
|
|
void
|
|
cvtstat(st, ost)
|
|
struct stat *st;
|
|
struct ostat *ost;
|
|
{
|
|
|
|
ost->st_dev = st->st_dev;
|
|
ost->st_ino = st->st_ino;
|
|
ost->st_mode = st->st_mode;
|
|
ost->st_nlink = st->st_nlink;
|
|
ost->st_uid = st->st_uid;
|
|
ost->st_gid = st->st_gid;
|
|
ost->st_rdev = st->st_rdev;
|
|
if (st->st_size < (quad_t)1 << 32)
|
|
ost->st_size = st->st_size;
|
|
else
|
|
ost->st_size = -2;
|
|
ost->st_atim = st->st_atim;
|
|
ost->st_mtim = st->st_mtim;
|
|
ost->st_ctim = st->st_ctim;
|
|
ost->st_blksize = st->st_blksize;
|
|
ost->st_blocks = st->st_blocks;
|
|
ost->st_flags = st->st_flags;
|
|
ost->st_gen = st->st_gen;
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct stat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
sys_stat(td, uap)
|
|
struct thread *td;
|
|
register struct stat_args /* {
|
|
char *path;
|
|
struct stat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
int error;
|
|
|
|
error = kern_statat(td, 0, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
&sb, NULL);
|
|
if (error == 0)
|
|
error = copyout(&sb, uap->ub, sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fstatat_args {
|
|
int fd;
|
|
char *path;
|
|
struct stat *buf;
|
|
int flag;
|
|
}
|
|
#endif
|
|
int
|
|
sys_fstatat(struct thread *td, struct fstatat_args *uap)
|
|
{
|
|
struct stat sb;
|
|
int error;
|
|
|
|
error = kern_statat(td, uap->flag, uap->fd, uap->path,
|
|
UIO_USERSPACE, &sb, NULL);
|
|
if (error == 0)
|
|
error = copyout(&sb, uap->buf, sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_statat(struct thread *td, int flag, int fd, char *path,
|
|
enum uio_seg pathseg, struct stat *sbp,
|
|
void (*hook)(struct vnode *vp, struct stat *sbp))
|
|
{
|
|
struct nameidata nd;
|
|
struct stat sb;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
if (flag & ~AT_SYMLINK_NOFOLLOW)
|
|
return (EINVAL);
|
|
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, ((flag & AT_SYMLINK_NOFOLLOW) ? NOFOLLOW :
|
|
FOLLOW) | LOCKSHARED | LOCKLEAF | AUDITVNODE1, pathseg, path, fd,
|
|
cap_rights_init(&rights, CAP_FSTAT), td);
|
|
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, td->td_ucred, NOCRED, td);
|
|
if (error == 0) {
|
|
SDT_PROBE(vfs, , stat, mode, path, sb.st_mode, 0, 0, 0);
|
|
if (S_ISREG(sb.st_mode))
|
|
SDT_PROBE(vfs, , stat, reg, path, pathseg, 0, 0, 0);
|
|
if (__predict_false(hook != NULL))
|
|
hook(nd.ni_vp, &sb);
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_vp);
|
|
if (error != 0)
|
|
return (error);
|
|
*sbp = sb;
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_STRUCT))
|
|
ktrstat(&sb);
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lstat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lstat(td, uap)
|
|
struct thread *td;
|
|
register struct lstat_args /* {
|
|
char *path;
|
|
struct stat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
int error;
|
|
|
|
error = kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, uap->path,
|
|
UIO_USERSPACE, &sb, NULL);
|
|
if (error == 0)
|
|
error = copyout(&sb, uap->ub, sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Implementation of the NetBSD [l]stat() functions.
|
|
*/
|
|
void
|
|
cvtnstat(sb, nsb)
|
|
struct stat *sb;
|
|
struct nstat *nsb;
|
|
{
|
|
|
|
bzero(nsb, sizeof *nsb);
|
|
nsb->st_dev = sb->st_dev;
|
|
nsb->st_ino = sb->st_ino;
|
|
nsb->st_mode = sb->st_mode;
|
|
nsb->st_nlink = sb->st_nlink;
|
|
nsb->st_uid = sb->st_uid;
|
|
nsb->st_gid = sb->st_gid;
|
|
nsb->st_rdev = sb->st_rdev;
|
|
nsb->st_atim = sb->st_atim;
|
|
nsb->st_mtim = sb->st_mtim;
|
|
nsb->st_ctim = sb->st_ctim;
|
|
nsb->st_size = sb->st_size;
|
|
nsb->st_blocks = sb->st_blocks;
|
|
nsb->st_blksize = sb->st_blksize;
|
|
nsb->st_flags = sb->st_flags;
|
|
nsb->st_gen = sb->st_gen;
|
|
nsb->st_birthtim = sb->st_birthtim;
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct nstat_args {
|
|
char *path;
|
|
struct nstat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
sys_nstat(td, uap)
|
|
struct thread *td;
|
|
register struct nstat_args /* {
|
|
char *path;
|
|
struct nstat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
int error;
|
|
|
|
error = kern_statat(td, 0, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
&sb, NULL);
|
|
if (error != 0)
|
|
return (error);
|
|
cvtnstat(&sb, &nsb);
|
|
return (copyout(&nsb, uap->ub, sizeof (nsb)));
|
|
}
|
|
|
|
/*
|
|
* NetBSD lstat. Get file status; this version does not follow links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lstat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
sys_nlstat(td, uap)
|
|
struct thread *td;
|
|
register struct nlstat_args /* {
|
|
char *path;
|
|
struct nstat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
int error;
|
|
|
|
error = kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, uap->path,
|
|
UIO_USERSPACE, &sb, NULL);
|
|
if (error != 0)
|
|
return (error);
|
|
cvtnstat(&sb, &nsb);
|
|
return (copyout(&nsb, uap->ub, sizeof (nsb)));
|
|
}
|
|
|
|
/*
|
|
* Get configurable pathname variables.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct pathconf_args {
|
|
char *path;
|
|
int name;
|
|
};
|
|
#endif
|
|
int
|
|
sys_pathconf(td, uap)
|
|
struct thread *td;
|
|
register struct pathconf_args /* {
|
|
char *path;
|
|
int name;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_pathconf(td, uap->path, UIO_USERSPACE, uap->name, FOLLOW));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lpathconf_args {
|
|
char *path;
|
|
int name;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lpathconf(td, uap)
|
|
struct thread *td;
|
|
register struct lpathconf_args /* {
|
|
char *path;
|
|
int name;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_pathconf(td, uap->path, UIO_USERSPACE, uap->name,
|
|
NOFOLLOW));
|
|
}
|
|
|
|
int
|
|
kern_pathconf(struct thread *td, char *path, enum uio_seg pathseg, int name,
|
|
u_long flags)
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, LOCKSHARED | LOCKLEAF | AUDITVNODE1 | flags,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
/* If asynchronous I/O is available, it works for all files. */
|
|
if (name == _PC_ASYNC_IO)
|
|
td->td_retval[0] = async_io_version;
|
|
else
|
|
error = VOP_PATHCONF(nd.ni_vp, name, td->td_retval);
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return target name of a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct readlink_args {
|
|
char *path;
|
|
char *buf;
|
|
size_t count;
|
|
};
|
|
#endif
|
|
int
|
|
sys_readlink(td, uap)
|
|
struct thread *td;
|
|
register struct readlink_args /* {
|
|
char *path;
|
|
char *buf;
|
|
size_t count;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_readlinkat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->buf, UIO_USERSPACE, uap->count));
|
|
}
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct readlinkat_args {
|
|
int fd;
|
|
char *path;
|
|
char *buf;
|
|
size_t bufsize;
|
|
};
|
|
#endif
|
|
int
|
|
sys_readlinkat(struct thread *td, struct readlinkat_args *uap)
|
|
{
|
|
|
|
return (kern_readlinkat(td, uap->fd, uap->path, UIO_USERSPACE,
|
|
uap->buf, UIO_USERSPACE, uap->bufsize));
|
|
}
|
|
|
|
int
|
|
kern_readlinkat(struct thread *td, int fd, char *path, enum uio_seg pathseg,
|
|
char *buf, enum uio_seg bufseg, size_t count)
|
|
{
|
|
struct vnode *vp;
|
|
struct iovec aiov;
|
|
struct uio auio;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if (count > IOSIZE_MAX)
|
|
return (EINVAL);
|
|
|
|
NDINIT_AT(&nd, LOOKUP, NOFOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1,
|
|
pathseg, path, fd, td);
|
|
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_readlink(td->td_ucred, vp);
|
|
if (error != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
#endif
|
|
if (vp->v_type != VLNK)
|
|
error = EINVAL;
|
|
else {
|
|
aiov.iov_base = buf;
|
|
aiov.iov_len = count;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = bufseg;
|
|
auio.uio_td = td;
|
|
auio.uio_resid = count;
|
|
error = VOP_READLINK(vp, &auio, td->td_ucred);
|
|
td->td_retval[0] = count - auio.uio_resid;
|
|
}
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for chflags() and fchflags().
|
|
*/
|
|
static int
|
|
setfflags(td, vp, flags)
|
|
struct thread *td;
|
|
struct vnode *vp;
|
|
u_long flags;
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
/* We can't support the value matching VNOVAL. */
|
|
if (flags == VNOVAL)
|
|
return (EOPNOTSUPP);
|
|
|
|
/*
|
|
* Prevent non-root users from setting flags on devices. When
|
|
* a device is reused, users can retain ownership of the device
|
|
* if they are allowed to set flags and programs assume that
|
|
* chown can't fail when done as root.
|
|
*/
|
|
if (vp->v_type == VCHR || vp->v_type == VBLK) {
|
|
error = priv_check(td, PRIV_VFS_CHFLAGS_DEV);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
return (error);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = flags;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
#ifdef MAC
|
|
error = mac_vnode_check_setflags(td->td_ucred, vp, vattr.va_flags);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_SETATTR(vp, &vattr, td->td_ucred);
|
|
VOP_UNLOCK(vp, 0);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chflags_args {
|
|
const char *path;
|
|
u_long flags;
|
|
};
|
|
#endif
|
|
int
|
|
sys_chflags(td, uap)
|
|
struct thread *td;
|
|
register struct chflags_args /* {
|
|
const char *path;
|
|
u_long flags;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_chflagsat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->flags, 0));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chflagsat_args {
|
|
int fd;
|
|
const char *path;
|
|
u_long flags;
|
|
int atflag;
|
|
}
|
|
#endif
|
|
int
|
|
sys_chflagsat(struct thread *td, struct chflagsat_args *uap)
|
|
{
|
|
int fd = uap->fd;
|
|
const char *path = uap->path;
|
|
u_long flags = uap->flags;
|
|
int atflag = uap->atflag;
|
|
|
|
if (atflag & ~AT_SYMLINK_NOFOLLOW)
|
|
return (EINVAL);
|
|
|
|
return (kern_chflagsat(td, fd, path, UIO_USERSPACE, flags, atflag));
|
|
}
|
|
|
|
/*
|
|
* Same as chflags() but doesn't follow symlinks.
|
|
*/
|
|
int
|
|
sys_lchflags(td, uap)
|
|
struct thread *td;
|
|
register struct lchflags_args /* {
|
|
const char *path;
|
|
u_long flags;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_chflagsat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->flags, AT_SYMLINK_NOFOLLOW));
|
|
}
|
|
|
|
static int
|
|
kern_chflagsat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, u_long flags, int atflag)
|
|
{
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int error, follow;
|
|
|
|
AUDIT_ARG_FFLAGS(flags);
|
|
follow = (atflag & AT_SYMLINK_NOFOLLOW) ? NOFOLLOW : FOLLOW;
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, follow | AUDITVNODE1, pathseg, path, fd,
|
|
cap_rights_init(&rights, CAP_FCHFLAGS), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfflags(td, nd.ni_vp, flags);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchflags_args {
|
|
int fd;
|
|
u_long flags;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fchflags(td, uap)
|
|
struct thread *td;
|
|
register struct fchflags_args /* {
|
|
int fd;
|
|
u_long flags;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
AUDIT_ARG_FFLAGS(uap->flags);
|
|
error = getvnode(td, uap->fd, cap_rights_init(&rights, CAP_FCHFLAGS),
|
|
&fp);
|
|
if (error != 0)
|
|
return (error);
|
|
#ifdef AUDIT
|
|
vn_lock(fp->f_vnode, LK_SHARED | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(fp->f_vnode);
|
|
VOP_UNLOCK(fp->f_vnode, 0);
|
|
#endif
|
|
error = setfflags(td, fp->f_vnode, uap->flags);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for chmod(), lchmod() and fchmod().
|
|
*/
|
|
int
|
|
setfmode(td, cred, vp, mode)
|
|
struct thread *td;
|
|
struct ucred *cred;
|
|
struct vnode *vp;
|
|
int mode;
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
return (error);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = mode & ALLPERMS;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_setmode(cred, vp, vattr.va_mode);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_SETATTR(vp, &vattr, cred);
|
|
VOP_UNLOCK(vp, 0);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chmod_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_chmod(td, uap)
|
|
struct thread *td;
|
|
register struct chmod_args /* {
|
|
char *path;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_fchmodat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->mode, 0));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchmodat_args {
|
|
int dirfd;
|
|
char *path;
|
|
mode_t mode;
|
|
int flag;
|
|
}
|
|
#endif
|
|
int
|
|
sys_fchmodat(struct thread *td, struct fchmodat_args *uap)
|
|
{
|
|
int flag = uap->flag;
|
|
int fd = uap->fd;
|
|
char *path = uap->path;
|
|
mode_t mode = uap->mode;
|
|
|
|
if (flag & ~AT_SYMLINK_NOFOLLOW)
|
|
return (EINVAL);
|
|
|
|
return (kern_fchmodat(td, fd, path, UIO_USERSPACE, mode, flag));
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given path name (don't follow links.)
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lchmod_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lchmod(td, uap)
|
|
struct thread *td;
|
|
register struct lchmod_args /* {
|
|
char *path;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_fchmodat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->mode, AT_SYMLINK_NOFOLLOW));
|
|
}
|
|
|
|
int
|
|
kern_fchmodat(struct thread *td, int fd, char *path, enum uio_seg pathseg,
|
|
mode_t mode, int flag)
|
|
{
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int error, follow;
|
|
|
|
AUDIT_ARG_MODE(mode);
|
|
follow = (flag & AT_SYMLINK_NOFOLLOW) ? NOFOLLOW : FOLLOW;
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, follow | AUDITVNODE1, pathseg, path, fd,
|
|
cap_rights_init(&rights, CAP_FCHMOD), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfmode(td, td->td_ucred, nd.ni_vp, mode);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchmod_args {
|
|
int fd;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fchmod(struct thread *td, struct fchmod_args *uap)
|
|
{
|
|
struct file *fp;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
AUDIT_ARG_MODE(uap->mode);
|
|
|
|
error = fget(td, uap->fd, cap_rights_init(&rights, CAP_FCHMOD), &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
error = fo_chmod(fp, uap->mode, td->td_ucred, td);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation for chown(), lchown(), and fchown()
|
|
*/
|
|
int
|
|
setfown(td, cred, vp, uid, gid)
|
|
struct thread *td;
|
|
struct ucred *cred;
|
|
struct vnode *vp;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
return (error);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = uid;
|
|
vattr.va_gid = gid;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_setowner(cred, vp, vattr.va_uid,
|
|
vattr.va_gid);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_SETATTR(vp, &vattr, cred);
|
|
VOP_UNLOCK(vp, 0);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chown_args {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
int
|
|
sys_chown(td, uap)
|
|
struct thread *td;
|
|
register struct chown_args /* {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_fchownat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->uid,
|
|
uap->gid, 0));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchownat_args {
|
|
int fd;
|
|
const char * path;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
int flag;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fchownat(struct thread *td, struct fchownat_args *uap)
|
|
{
|
|
int flag;
|
|
|
|
flag = uap->flag;
|
|
if (flag & ~AT_SYMLINK_NOFOLLOW)
|
|
return (EINVAL);
|
|
|
|
return (kern_fchownat(td, uap->fd, uap->path, UIO_USERSPACE, uap->uid,
|
|
uap->gid, uap->flag));
|
|
}
|
|
|
|
int
|
|
kern_fchownat(struct thread *td, int fd, char *path, enum uio_seg pathseg,
|
|
int uid, int gid, int flag)
|
|
{
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int error, follow;
|
|
|
|
AUDIT_ARG_OWNER(uid, gid);
|
|
follow = (flag & AT_SYMLINK_NOFOLLOW) ? NOFOLLOW : FOLLOW;
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, follow | AUDITVNODE1, pathseg, path, fd,
|
|
cap_rights_init(&rights, CAP_FCHOWN), td);
|
|
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfown(td, td->td_ucred, nd.ni_vp, uid, gid);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name, do not cross symlinks.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lchown_args {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lchown(td, uap)
|
|
struct thread *td;
|
|
register struct lchown_args /* {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_fchownat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->uid, uap->gid, AT_SYMLINK_NOFOLLOW));
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchown_args {
|
|
int fd;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fchown(td, uap)
|
|
struct thread *td;
|
|
register struct fchown_args /* {
|
|
int fd;
|
|
int uid;
|
|
int gid;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
AUDIT_ARG_OWNER(uap->uid, uap->gid);
|
|
error = fget(td, uap->fd, cap_rights_init(&rights, CAP_FCHOWN), &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
error = fo_chown(fp, uap->uid, uap->gid, td->td_ucred, td);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for utimes(), lutimes(), and futimes().
|
|
*/
|
|
static int
|
|
getutimes(usrtvp, tvpseg, tsp)
|
|
const struct timeval *usrtvp;
|
|
enum uio_seg tvpseg;
|
|
struct timespec *tsp;
|
|
{
|
|
struct timeval tv[2];
|
|
const struct timeval *tvp;
|
|
int error;
|
|
|
|
if (usrtvp == NULL) {
|
|
vfs_timestamp(&tsp[0]);
|
|
tsp[1] = tsp[0];
|
|
} else {
|
|
if (tvpseg == UIO_SYSSPACE) {
|
|
tvp = usrtvp;
|
|
} else {
|
|
if ((error = copyin(usrtvp, tv, sizeof(tv))) != 0)
|
|
return (error);
|
|
tvp = tv;
|
|
}
|
|
|
|
if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000 ||
|
|
tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
|
|
return (EINVAL);
|
|
TIMEVAL_TO_TIMESPEC(&tvp[0], &tsp[0]);
|
|
TIMEVAL_TO_TIMESPEC(&tvp[1], &tsp[1]);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for futimens(), utimensat().
|
|
*/
|
|
#define UTIMENS_NULL 0x1
|
|
#define UTIMENS_EXIT 0x2
|
|
static int
|
|
getutimens(const struct timespec *usrtsp, enum uio_seg tspseg,
|
|
struct timespec *tsp, int *retflags)
|
|
{
|
|
struct timespec tsnow;
|
|
int error;
|
|
|
|
vfs_timestamp(&tsnow);
|
|
*retflags = 0;
|
|
if (usrtsp == NULL) {
|
|
tsp[0] = tsnow;
|
|
tsp[1] = tsnow;
|
|
*retflags |= UTIMENS_NULL;
|
|
return (0);
|
|
}
|
|
if (tspseg == UIO_SYSSPACE) {
|
|
tsp[0] = usrtsp[0];
|
|
tsp[1] = usrtsp[1];
|
|
} else if ((error = copyin(usrtsp, tsp, sizeof(*tsp) * 2)) != 0)
|
|
return (error);
|
|
if (tsp[0].tv_nsec == UTIME_OMIT && tsp[1].tv_nsec == UTIME_OMIT)
|
|
*retflags |= UTIMENS_EXIT;
|
|
if (tsp[0].tv_nsec == UTIME_NOW && tsp[1].tv_nsec == UTIME_NOW)
|
|
*retflags |= UTIMENS_NULL;
|
|
if (tsp[0].tv_nsec == UTIME_OMIT)
|
|
tsp[0].tv_sec = VNOVAL;
|
|
else if (tsp[0].tv_nsec == UTIME_NOW)
|
|
tsp[0] = tsnow;
|
|
else if (tsp[0].tv_nsec < 0 || tsp[0].tv_nsec >= 1000000000L)
|
|
return (EINVAL);
|
|
if (tsp[1].tv_nsec == UTIME_OMIT)
|
|
tsp[1].tv_sec = VNOVAL;
|
|
else if (tsp[1].tv_nsec == UTIME_NOW)
|
|
tsp[1] = tsnow;
|
|
else if (tsp[1].tv_nsec < 0 || tsp[1].tv_nsec >= 1000000000L)
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for utimes(), lutimes(), futimes(), futimens(),
|
|
* and utimensat().
|
|
*/
|
|
static int
|
|
setutimes(td, vp, ts, numtimes, nullflag)
|
|
struct thread *td;
|
|
struct vnode *vp;
|
|
const struct timespec *ts;
|
|
int numtimes;
|
|
int nullflag;
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error, setbirthtime;
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
return (error);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
setbirthtime = 0;
|
|
if (numtimes < 3 && !VOP_GETATTR(vp, &vattr, td->td_ucred) &&
|
|
timespeccmp(&ts[1], &vattr.va_birthtime, < ))
|
|
setbirthtime = 1;
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_atime = ts[0];
|
|
vattr.va_mtime = ts[1];
|
|
if (setbirthtime)
|
|
vattr.va_birthtime = ts[1];
|
|
if (numtimes > 2)
|
|
vattr.va_birthtime = ts[2];
|
|
if (nullflag)
|
|
vattr.va_vaflags |= VA_UTIMES_NULL;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_setutimes(td->td_ucred, vp, vattr.va_atime,
|
|
vattr.va_mtime);
|
|
#endif
|
|
if (error == 0)
|
|
error = VOP_SETATTR(vp, &vattr, td->td_ucred);
|
|
VOP_UNLOCK(vp, 0);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct utimes_args {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
int
|
|
sys_utimes(td, uap)
|
|
struct thread *td;
|
|
register struct utimes_args /* {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_utimesat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->tptr, UIO_USERSPACE));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct futimesat_args {
|
|
int fd;
|
|
const char * path;
|
|
const struct timeval * times;
|
|
};
|
|
#endif
|
|
int
|
|
sys_futimesat(struct thread *td, struct futimesat_args *uap)
|
|
{
|
|
|
|
return (kern_utimesat(td, uap->fd, uap->path, UIO_USERSPACE,
|
|
uap->times, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_utimesat(struct thread *td, int fd, char *path, enum uio_seg pathseg,
|
|
struct timeval *tptr, enum uio_seg tptrseg)
|
|
{
|
|
struct nameidata nd;
|
|
struct timespec ts[2];
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
if ((error = getutimes(tptr, tptrseg, ts)) != 0)
|
|
return (error);
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, FOLLOW | AUDITVNODE1, pathseg, path, fd,
|
|
cap_rights_init(&rights, CAP_FUTIMES), td);
|
|
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setutimes(td, nd.ni_vp, ts, 2, tptr == NULL);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lutimes_args {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lutimes(td, uap)
|
|
struct thread *td;
|
|
register struct lutimes_args /* {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_lutimes(td, uap->path, UIO_USERSPACE, uap->tptr,
|
|
UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_lutimes(struct thread *td, char *path, enum uio_seg pathseg,
|
|
struct timeval *tptr, enum uio_seg tptrseg)
|
|
{
|
|
struct timespec ts[2];
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if ((error = getutimes(tptr, tptrseg, ts)) != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | AUDITVNODE1, pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setutimes(td, nd.ni_vp, ts, 2, tptr == NULL);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct futimes_args {
|
|
int fd;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
int
|
|
sys_futimes(td, uap)
|
|
struct thread *td;
|
|
register struct futimes_args /* {
|
|
int fd;
|
|
struct timeval *tptr;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_futimes(td, uap->fd, uap->tptr, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_futimes(struct thread *td, int fd, struct timeval *tptr,
|
|
enum uio_seg tptrseg)
|
|
{
|
|
struct timespec ts[2];
|
|
struct file *fp;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
error = getutimes(tptr, tptrseg, ts);
|
|
if (error != 0)
|
|
return (error);
|
|
error = getvnode(td, fd, cap_rights_init(&rights, CAP_FUTIMES), &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
#ifdef AUDIT
|
|
vn_lock(fp->f_vnode, LK_SHARED | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(fp->f_vnode);
|
|
VOP_UNLOCK(fp->f_vnode, 0);
|
|
#endif
|
|
error = setutimes(td, fp->f_vnode, ts, 2, tptr == NULL);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_futimens(struct thread *td, struct futimens_args *uap)
|
|
{
|
|
|
|
return (kern_futimens(td, uap->fd, uap->times, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_futimens(struct thread *td, int fd, struct timespec *tptr,
|
|
enum uio_seg tptrseg)
|
|
{
|
|
struct timespec ts[2];
|
|
struct file *fp;
|
|
cap_rights_t rights;
|
|
int error, flags;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
error = getutimens(tptr, tptrseg, ts, &flags);
|
|
if (error != 0)
|
|
return (error);
|
|
if (flags & UTIMENS_EXIT)
|
|
return (0);
|
|
error = getvnode(td, fd, cap_rights_init(&rights, CAP_FUTIMES), &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
#ifdef AUDIT
|
|
vn_lock(fp->f_vnode, LK_SHARED | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(fp->f_vnode);
|
|
VOP_UNLOCK(fp->f_vnode, 0);
|
|
#endif
|
|
error = setutimes(td, fp->f_vnode, ts, 2, flags & UTIMENS_NULL);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_utimensat(struct thread *td, struct utimensat_args *uap)
|
|
{
|
|
|
|
return (kern_utimensat(td, uap->fd, uap->path, UIO_USERSPACE,
|
|
uap->times, UIO_USERSPACE, uap->flag));
|
|
}
|
|
|
|
int
|
|
kern_utimensat(struct thread *td, int fd, char *path, enum uio_seg pathseg,
|
|
struct timespec *tptr, enum uio_seg tptrseg, int flag)
|
|
{
|
|
struct nameidata nd;
|
|
struct timespec ts[2];
|
|
cap_rights_t rights;
|
|
int error, flags;
|
|
|
|
if (flag & ~AT_SYMLINK_NOFOLLOW)
|
|
return (EINVAL);
|
|
|
|
if ((error = getutimens(tptr, tptrseg, ts, &flags)) != 0)
|
|
return (error);
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, ((flag & AT_SYMLINK_NOFOLLOW) ? NOFOLLOW :
|
|
FOLLOW) | AUDITVNODE1, pathseg, path, fd,
|
|
cap_rights_init(&rights, CAP_FUTIMES), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
/*
|
|
* We are allowed to call namei() regardless of 2xUTIME_OMIT.
|
|
* POSIX states:
|
|
* "If both tv_nsec fields are UTIME_OMIT... EACCESS may be detected."
|
|
* "Search permission is denied by a component of the path prefix."
|
|
*/
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if ((flags & UTIMENS_EXIT) == 0)
|
|
error = setutimes(td, nd.ni_vp, ts, 2, flags & UTIMENS_NULL);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct truncate_args {
|
|
char *path;
|
|
int pad;
|
|
off_t length;
|
|
};
|
|
#endif
|
|
int
|
|
sys_truncate(td, uap)
|
|
struct thread *td;
|
|
register struct truncate_args /* {
|
|
char *path;
|
|
int pad;
|
|
off_t length;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_truncate(td, uap->path, UIO_USERSPACE, uap->length));
|
|
}
|
|
|
|
int
|
|
kern_truncate(struct thread *td, char *path, enum uio_seg pathseg, off_t length)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
void *rl_cookie;
|
|
struct vattr vattr;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if (length < 0)
|
|
return(EINVAL);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE1, pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
rl_cookie = vn_rangelock_wlock(vp, 0, OFF_MAX);
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) {
|
|
vn_rangelock_unlock(vp, rl_cookie);
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
#ifdef MAC
|
|
else if ((error = mac_vnode_check_write(td->td_ucred, NOCRED, vp))) {
|
|
}
|
|
#endif
|
|
else if ((error = vn_writechk(vp)) == 0 &&
|
|
(error = VOP_ACCESS(vp, VWRITE, td->td_ucred, td)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = length;
|
|
error = VOP_SETATTR(vp, &vattr, td->td_ucred);
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
vn_finished_write(mp);
|
|
vn_rangelock_unlock(vp, rl_cookie);
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43)
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct otruncate_args {
|
|
char *path;
|
|
long length;
|
|
};
|
|
#endif
|
|
int
|
|
otruncate(td, uap)
|
|
struct thread *td;
|
|
register struct otruncate_args /* {
|
|
char *path;
|
|
long length;
|
|
} */ *uap;
|
|
{
|
|
struct truncate_args /* {
|
|
char *path;
|
|
int pad;
|
|
off_t length;
|
|
} */ nuap;
|
|
|
|
nuap.path = uap->path;
|
|
nuap.length = uap->length;
|
|
return (sys_truncate(td, &nuap));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
#if defined(COMPAT_FREEBSD6)
|
|
/* Versions with the pad argument */
|
|
int
|
|
freebsd6_truncate(struct thread *td, struct freebsd6_truncate_args *uap)
|
|
{
|
|
struct truncate_args ouap;
|
|
|
|
ouap.path = uap->path;
|
|
ouap.length = uap->length;
|
|
return (sys_truncate(td, &ouap));
|
|
}
|
|
|
|
int
|
|
freebsd6_ftruncate(struct thread *td, struct freebsd6_ftruncate_args *uap)
|
|
{
|
|
struct ftruncate_args ouap;
|
|
|
|
ouap.fd = uap->fd;
|
|
ouap.length = uap->length;
|
|
return (sys_ftruncate(td, &ouap));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Sync an open file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fsync_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fsync(td, uap)
|
|
struct thread *td;
|
|
struct fsync_args /* {
|
|
int fd;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
cap_rights_t rights;
|
|
int error, lock_flags;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
error = getvnode(td, uap->fd, cap_rights_init(&rights, CAP_FSYNC), &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
vp = fp->f_vnode;
|
|
error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
|
|
if (error != 0)
|
|
goto drop;
|
|
if (MNT_SHARED_WRITES(mp) ||
|
|
((mp == NULL) && MNT_SHARED_WRITES(vp->v_mount))) {
|
|
lock_flags = LK_SHARED;
|
|
} else {
|
|
lock_flags = LK_EXCLUSIVE;
|
|
}
|
|
vn_lock(vp, lock_flags | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(vp);
|
|
if (vp->v_object != NULL) {
|
|
VM_OBJECT_WLOCK(vp->v_object);
|
|
vm_object_page_clean(vp->v_object, 0, 0, 0);
|
|
VM_OBJECT_WUNLOCK(vp->v_object);
|
|
}
|
|
error = VOP_FSYNC(vp, MNT_WAIT, td);
|
|
|
|
VOP_UNLOCK(vp, 0);
|
|
vn_finished_write(mp);
|
|
drop:
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Rename files. Source and destination must either both be directories, or
|
|
* both not be directories. If target is a directory, it must be empty.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rename_args {
|
|
char *from;
|
|
char *to;
|
|
};
|
|
#endif
|
|
int
|
|
sys_rename(td, uap)
|
|
struct thread *td;
|
|
register struct rename_args /* {
|
|
char *from;
|
|
char *to;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_renameat(td, AT_FDCWD, uap->from, AT_FDCWD,
|
|
uap->to, UIO_USERSPACE));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct renameat_args {
|
|
int oldfd;
|
|
char *old;
|
|
int newfd;
|
|
char *new;
|
|
};
|
|
#endif
|
|
int
|
|
sys_renameat(struct thread *td, struct renameat_args *uap)
|
|
{
|
|
|
|
return (kern_renameat(td, uap->oldfd, uap->old, uap->newfd, uap->new,
|
|
UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_renameat(struct thread *td, int oldfd, char *old, int newfd, char *new,
|
|
enum uio_seg pathseg)
|
|
{
|
|
struct mount *mp = NULL;
|
|
struct vnode *tvp, *fvp, *tdvp;
|
|
struct nameidata fromnd, tond;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
again:
|
|
bwillwrite();
|
|
#ifdef MAC
|
|
NDINIT_ATRIGHTS(&fromnd, DELETE, LOCKPARENT | LOCKLEAF | SAVESTART |
|
|
AUDITVNODE1, pathseg, old, oldfd,
|
|
cap_rights_init(&rights, CAP_RENAMEAT), td);
|
|
#else
|
|
NDINIT_ATRIGHTS(&fromnd, DELETE, WANTPARENT | SAVESTART | AUDITVNODE1,
|
|
pathseg, old, oldfd, cap_rights_init(&rights, CAP_RENAMEAT), td);
|
|
#endif
|
|
|
|
if ((error = namei(&fromnd)) != 0)
|
|
return (error);
|
|
#ifdef MAC
|
|
error = mac_vnode_check_rename_from(td->td_ucred, fromnd.ni_dvp,
|
|
fromnd.ni_vp, &fromnd.ni_cnd);
|
|
VOP_UNLOCK(fromnd.ni_dvp, 0);
|
|
if (fromnd.ni_dvp != fromnd.ni_vp)
|
|
VOP_UNLOCK(fromnd.ni_vp, 0);
|
|
#endif
|
|
fvp = fromnd.ni_vp;
|
|
NDINIT_ATRIGHTS(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE |
|
|
SAVESTART | AUDITVNODE2, pathseg, new, newfd,
|
|
cap_rights_init(&rights, CAP_LINKAT), td);
|
|
if (fromnd.ni_vp->v_type == VDIR)
|
|
tond.ni_cnd.cn_flags |= WILLBEDIR;
|
|
if ((error = namei(&tond)) != 0) {
|
|
/* Translate error code for rename("dir1", "dir2/."). */
|
|
if (error == EISDIR && fvp->v_type == VDIR)
|
|
error = EINVAL;
|
|
NDFREE(&fromnd, NDF_ONLY_PNBUF);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
goto out1;
|
|
}
|
|
tdvp = tond.ni_dvp;
|
|
tvp = tond.ni_vp;
|
|
error = vn_start_write(fvp, &mp, V_NOWAIT);
|
|
if (error != 0) {
|
|
NDFREE(&fromnd, NDF_ONLY_PNBUF);
|
|
NDFREE(&tond, NDF_ONLY_PNBUF);
|
|
if (tvp != NULL)
|
|
vput(tvp);
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
vrele(tond.ni_startdir);
|
|
if (fromnd.ni_startdir != NULL)
|
|
vrele(fromnd.ni_startdir);
|
|
error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH);
|
|
if (error != 0)
|
|
return (error);
|
|
goto again;
|
|
}
|
|
if (tvp != NULL) {
|
|
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
goto out;
|
|
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
|
|
error = EISDIR;
|
|
goto out;
|
|
}
|
|
#ifdef CAPABILITIES
|
|
if (newfd != AT_FDCWD) {
|
|
/*
|
|
* If the target already exists we require CAP_UNLINKAT
|
|
* from 'newfd'.
|
|
*/
|
|
error = cap_check(&tond.ni_filecaps.fc_rights,
|
|
cap_rights_init(&rights, CAP_UNLINKAT));
|
|
if (error != 0)
|
|
goto out;
|
|
}
|
|
#endif
|
|
}
|
|
if (fvp == tdvp) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
/*
|
|
* If the source is the same as the destination (that is, if they
|
|
* are links to the same vnode), then there is nothing to do.
|
|
*/
|
|
if (fvp == tvp)
|
|
error = -1;
|
|
#ifdef MAC
|
|
else
|
|
error = mac_vnode_check_rename_to(td->td_ucred, tdvp,
|
|
tond.ni_vp, fromnd.ni_dvp == tdvp, &tond.ni_cnd);
|
|
#endif
|
|
out:
|
|
if (error == 0) {
|
|
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
|
|
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
|
|
NDFREE(&fromnd, NDF_ONLY_PNBUF);
|
|
NDFREE(&tond, NDF_ONLY_PNBUF);
|
|
} else {
|
|
NDFREE(&fromnd, NDF_ONLY_PNBUF);
|
|
NDFREE(&tond, NDF_ONLY_PNBUF);
|
|
if (tvp != NULL)
|
|
vput(tvp);
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
}
|
|
vrele(tond.ni_startdir);
|
|
vn_finished_write(mp);
|
|
out1:
|
|
if (fromnd.ni_startdir)
|
|
vrele(fromnd.ni_startdir);
|
|
if (error == -1)
|
|
return (0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkdir_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_mkdir(td, uap)
|
|
struct thread *td;
|
|
register struct mkdir_args /* {
|
|
char *path;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_mkdirat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->mode));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkdirat_args {
|
|
int fd;
|
|
char *path;
|
|
mode_t mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_mkdirat(struct thread *td, struct mkdirat_args *uap)
|
|
{
|
|
|
|
return (kern_mkdirat(td, uap->fd, uap->path, UIO_USERSPACE, uap->mode));
|
|
}
|
|
|
|
int
|
|
kern_mkdirat(struct thread *td, int fd, char *path, enum uio_seg segflg,
|
|
int mode)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
AUDIT_ARG_MODE(mode);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 |
|
|
NOCACHE, segflg, path, fd, cap_rights_init(&rights, CAP_MKDIRAT),
|
|
td);
|
|
nd.ni_cnd.cn_flags |= WILLBEDIR;
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
/*
|
|
* XXX namei called with LOCKPARENT but not LOCKLEAF has
|
|
* the strange behaviour of leaving the vnode unlocked
|
|
* if the target is the same vnode as the parent.
|
|
*/
|
|
if (vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(vp);
|
|
return (EEXIST);
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VDIR;
|
|
vattr.va_mode = (mode & ACCESSPERMS) &~ td->td_proc->p_fd->fd_cmask;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd,
|
|
&vattr);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
#ifdef MAC
|
|
out:
|
|
#endif
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if (error == 0)
|
|
vput(nd.ni_vp);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remove a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rmdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
sys_rmdir(td, uap)
|
|
struct thread *td;
|
|
struct rmdir_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_rmdirat(td, AT_FDCWD, uap->path, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_rmdirat(struct thread *td, int fd, char *path, enum uio_seg pathseg)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, DELETE, LOCKPARENT | LOCKLEAF | AUDITVNODE1,
|
|
pathseg, path, fd, cap_rights_init(&rights, CAP_UNLINKAT), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
goto out;
|
|
}
|
|
/*
|
|
* No rmdir "." please.
|
|
*/
|
|
if (nd.ni_dvp == vp) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*/
|
|
if (vp->v_vflag & VV_ROOT) {
|
|
error = EBUSY;
|
|
goto out;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_vnode_check_unlink(td->td_ucred, nd.ni_dvp, vp,
|
|
&nd.ni_cnd);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
vfs_notify_upper(vp, VFS_NOTIFY_UPPER_UNLINK);
|
|
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
|
|
vn_finished_write(mp);
|
|
out:
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Read a block of directory entries in a filesystem independent format.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ogetdirentries_args {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
};
|
|
#endif
|
|
int
|
|
ogetdirentries(struct thread *td, struct ogetdirentries_args *uap)
|
|
{
|
|
long loff;
|
|
int error;
|
|
|
|
error = kern_ogetdirentries(td, uap, &loff);
|
|
if (error == 0)
|
|
error = copyout(&loff, uap->basep, sizeof(long));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_ogetdirentries(struct thread *td, struct ogetdirentries_args *uap,
|
|
long *ploff)
|
|
{
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio, kuio;
|
|
struct iovec aiov, kiov;
|
|
struct dirent *dp, *edp;
|
|
cap_rights_t rights;
|
|
caddr_t dirbuf;
|
|
int error, eofflag, readcnt;
|
|
long loff;
|
|
off_t foffset;
|
|
|
|
/* XXX arbitrary sanity limit on `count'. */
|
|
if (uap->count > 64 * 1024)
|
|
return (EINVAL);
|
|
error = getvnode(td, uap->fd, cap_rights_init(&rights, CAP_READ), &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0) {
|
|
fdrop(fp, td);
|
|
return (EBADF);
|
|
}
|
|
vp = fp->f_vnode;
|
|
foffset = foffset_lock(fp, 0);
|
|
unionread:
|
|
if (vp->v_type != VDIR) {
|
|
foffset_unlock(fp, foffset, 0);
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = uap->count;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_td = td;
|
|
auio.uio_resid = uap->count;
|
|
vn_lock(vp, LK_SHARED | LK_RETRY);
|
|
loff = auio.uio_offset = foffset;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_readdir(td->td_ucred, vp);
|
|
if (error != 0) {
|
|
VOP_UNLOCK(vp, 0);
|
|
foffset_unlock(fp, foffset, FOF_NOUPDATE);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
#endif
|
|
# if (BYTE_ORDER != LITTLE_ENDIAN)
|
|
if (vp->v_mount->mnt_maxsymlinklen <= 0) {
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag,
|
|
NULL, NULL);
|
|
foffset = auio.uio_offset;
|
|
} else
|
|
# endif
|
|
{
|
|
kuio = auio;
|
|
kuio.uio_iov = &kiov;
|
|
kuio.uio_segflg = UIO_SYSSPACE;
|
|
kiov.iov_len = uap->count;
|
|
dirbuf = malloc(uap->count, M_TEMP, M_WAITOK);
|
|
kiov.iov_base = dirbuf;
|
|
error = VOP_READDIR(vp, &kuio, fp->f_cred, &eofflag,
|
|
NULL, NULL);
|
|
foffset = kuio.uio_offset;
|
|
if (error == 0) {
|
|
readcnt = uap->count - kuio.uio_resid;
|
|
edp = (struct dirent *)&dirbuf[readcnt];
|
|
for (dp = (struct dirent *)dirbuf; dp < edp; ) {
|
|
# if (BYTE_ORDER == LITTLE_ENDIAN)
|
|
/*
|
|
* The expected low byte of
|
|
* dp->d_namlen is our dp->d_type.
|
|
* The high MBZ byte of dp->d_namlen
|
|
* is our dp->d_namlen.
|
|
*/
|
|
dp->d_type = dp->d_namlen;
|
|
dp->d_namlen = 0;
|
|
# else
|
|
/*
|
|
* The dp->d_type is the high byte
|
|
* of the expected dp->d_namlen,
|
|
* so must be zero'ed.
|
|
*/
|
|
dp->d_type = 0;
|
|
# endif
|
|
if (dp->d_reclen > 0) {
|
|
dp = (struct dirent *)
|
|
((char *)dp + dp->d_reclen);
|
|
} else {
|
|
error = EIO;
|
|
break;
|
|
}
|
|
}
|
|
if (dp >= edp)
|
|
error = uiomove(dirbuf, readcnt, &auio);
|
|
}
|
|
free(dirbuf, M_TEMP);
|
|
}
|
|
if (error != 0) {
|
|
VOP_UNLOCK(vp, 0);
|
|
foffset_unlock(fp, foffset, 0);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
if (uap->count == auio.uio_resid &&
|
|
(vp->v_vflag & VV_ROOT) &&
|
|
(vp->v_mount->mnt_flag & MNT_UNION)) {
|
|
struct vnode *tvp = vp;
|
|
vp = vp->v_mount->mnt_vnodecovered;
|
|
VREF(vp);
|
|
fp->f_vnode = vp;
|
|
fp->f_data = vp;
|
|
foffset = 0;
|
|
vput(tvp);
|
|
goto unionread;
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
foffset_unlock(fp, foffset, 0);
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = uap->count - auio.uio_resid;
|
|
if (error == 0)
|
|
*ploff = loff;
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Read a block of directory entries in a filesystem independent format.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getdirentries_args {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
};
|
|
#endif
|
|
int
|
|
sys_getdirentries(td, uap)
|
|
struct thread *td;
|
|
register struct getdirentries_args /* {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
} */ *uap;
|
|
{
|
|
long base;
|
|
int error;
|
|
|
|
error = kern_getdirentries(td, uap->fd, uap->buf, uap->count, &base,
|
|
NULL, UIO_USERSPACE);
|
|
if (error != 0)
|
|
return (error);
|
|
if (uap->basep != NULL)
|
|
error = copyout(&base, uap->basep, sizeof(long));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_getdirentries(struct thread *td, int fd, char *buf, u_int count,
|
|
long *basep, ssize_t *residp, enum uio_seg bufseg)
|
|
{
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
cap_rights_t rights;
|
|
long loff;
|
|
int error, eofflag;
|
|
off_t foffset;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
if (count > IOSIZE_MAX)
|
|
return (EINVAL);
|
|
auio.uio_resid = count;
|
|
error = getvnode(td, fd, cap_rights_init(&rights, CAP_READ), &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0) {
|
|
fdrop(fp, td);
|
|
return (EBADF);
|
|
}
|
|
vp = fp->f_vnode;
|
|
foffset = foffset_lock(fp, 0);
|
|
unionread:
|
|
if (vp->v_type != VDIR) {
|
|
error = EINVAL;
|
|
goto fail;
|
|
}
|
|
aiov.iov_base = buf;
|
|
aiov.iov_len = count;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = bufseg;
|
|
auio.uio_td = td;
|
|
vn_lock(vp, LK_SHARED | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(vp);
|
|
loff = auio.uio_offset = foffset;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_readdir(td->td_ucred, vp);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, NULL,
|
|
NULL);
|
|
foffset = auio.uio_offset;
|
|
if (error != 0) {
|
|
VOP_UNLOCK(vp, 0);
|
|
goto fail;
|
|
}
|
|
if (count == auio.uio_resid &&
|
|
(vp->v_vflag & VV_ROOT) &&
|
|
(vp->v_mount->mnt_flag & MNT_UNION)) {
|
|
struct vnode *tvp = vp;
|
|
|
|
vp = vp->v_mount->mnt_vnodecovered;
|
|
VREF(vp);
|
|
fp->f_vnode = vp;
|
|
fp->f_data = vp;
|
|
foffset = 0;
|
|
vput(tvp);
|
|
goto unionread;
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
*basep = loff;
|
|
if (residp != NULL)
|
|
*residp = auio.uio_resid;
|
|
td->td_retval[0] = count - auio.uio_resid;
|
|
fail:
|
|
foffset_unlock(fp, foffset, 0);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getdents_args {
|
|
int fd;
|
|
char *buf;
|
|
size_t count;
|
|
};
|
|
#endif
|
|
int
|
|
sys_getdents(td, uap)
|
|
struct thread *td;
|
|
register struct getdents_args /* {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
} */ *uap;
|
|
{
|
|
struct getdirentries_args ap;
|
|
|
|
ap.fd = uap->fd;
|
|
ap.buf = uap->buf;
|
|
ap.count = uap->count;
|
|
ap.basep = NULL;
|
|
return (sys_getdirentries(td, &ap));
|
|
}
|
|
|
|
/*
|
|
* Set the mode mask for creation of filesystem nodes.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct umask_args {
|
|
int newmask;
|
|
};
|
|
#endif
|
|
int
|
|
sys_umask(td, uap)
|
|
struct thread *td;
|
|
struct umask_args /* {
|
|
int newmask;
|
|
} */ *uap;
|
|
{
|
|
struct filedesc *fdp;
|
|
|
|
fdp = td->td_proc->p_fd;
|
|
FILEDESC_XLOCK(fdp);
|
|
td->td_retval[0] = fdp->fd_cmask;
|
|
fdp->fd_cmask = uap->newmask & ALLPERMS;
|
|
FILEDESC_XUNLOCK(fdp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Void all references to file by ripping underlying filesystem away from
|
|
* vnode.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct revoke_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
sys_revoke(td, uap)
|
|
struct thread *td;
|
|
register struct revoke_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (vp->v_type != VCHR || vp->v_rdev == NULL) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_vnode_check_revoke(td->td_ucred, vp);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
error = VOP_GETATTR(vp, &vattr, td->td_ucred);
|
|
if (error != 0)
|
|
goto out;
|
|
if (td->td_ucred->cr_uid != vattr.va_uid) {
|
|
error = priv_check(td, PRIV_VFS_ADMIN);
|
|
if (error != 0)
|
|
goto out;
|
|
}
|
|
if (vcount(vp) > 1)
|
|
VOP_REVOKE(vp, REVOKEALL);
|
|
out:
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert a user file descriptor to a kernel file entry and check that, if it
|
|
* is a capability, the correct rights are present. A reference on the file
|
|
* entry is held upon returning.
|
|
*/
|
|
int
|
|
getvnode(struct thread *td, int fd, cap_rights_t *rightsp, struct file **fpp)
|
|
{
|
|
struct file *fp;
|
|
int error;
|
|
|
|
error = fget_unlocked(td->td_proc->p_fd, fd, rightsp, &fp, NULL);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
/*
|
|
* The file could be not of the vnode type, or it may be not
|
|
* yet fully initialized, in which case the f_vnode pointer
|
|
* may be set, but f_ops is still badfileops. E.g.,
|
|
* devfs_open() transiently create such situation to
|
|
* facilitate csw d_fdopen().
|
|
*
|
|
* Dupfdopen() handling in kern_openat() installs the
|
|
* half-baked file into the process descriptor table, allowing
|
|
* other thread to dereference it. Guard against the race by
|
|
* checking f_ops.
|
|
*/
|
|
if (fp->f_vnode == NULL || fp->f_ops == &badfileops) {
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
*fpp = fp;
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Get an (NFS) file handle.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lgetfh_args {
|
|
char *fname;
|
|
fhandle_t *fhp;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lgetfh(td, uap)
|
|
struct thread *td;
|
|
register struct lgetfh_args *uap;
|
|
{
|
|
struct nameidata nd;
|
|
fhandle_t fh;
|
|
register struct vnode *vp;
|
|
int error;
|
|
|
|
error = priv_check(td, PRIV_VFS_GETFH);
|
|
if (error != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->fname, td);
|
|
error = namei(&nd);
|
|
if (error != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
bzero(&fh, sizeof(fh));
|
|
fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
|
|
error = VOP_VPTOFH(vp, &fh.fh_fid);
|
|
vput(vp);
|
|
if (error == 0)
|
|
error = copyout(&fh, uap->fhp, sizeof (fh));
|
|
return (error);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getfh_args {
|
|
char *fname;
|
|
fhandle_t *fhp;
|
|
};
|
|
#endif
|
|
int
|
|
sys_getfh(td, uap)
|
|
struct thread *td;
|
|
register struct getfh_args *uap;
|
|
{
|
|
struct nameidata nd;
|
|
fhandle_t fh;
|
|
register struct vnode *vp;
|
|
int error;
|
|
|
|
error = priv_check(td, PRIV_VFS_GETFH);
|
|
if (error != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->fname, td);
|
|
error = namei(&nd);
|
|
if (error != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
bzero(&fh, sizeof(fh));
|
|
fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
|
|
error = VOP_VPTOFH(vp, &fh.fh_fid);
|
|
vput(vp);
|
|
if (error == 0)
|
|
error = copyout(&fh, uap->fhp, sizeof (fh));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* syscall for the rpc.lockd to use to translate a NFS file handle into an
|
|
* open descriptor.
|
|
*
|
|
* warning: do not remove the priv_check() call or this becomes one giant
|
|
* security hole.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhopen_args {
|
|
const struct fhandle *u_fhp;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fhopen(td, uap)
|
|
struct thread *td;
|
|
struct fhopen_args /* {
|
|
const struct fhandle *u_fhp;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct fhandle fhp;
|
|
struct file *fp;
|
|
int fmode, error;
|
|
int indx;
|
|
|
|
error = priv_check(td, PRIV_VFS_FHOPEN);
|
|
if (error != 0)
|
|
return (error);
|
|
indx = -1;
|
|
fmode = FFLAGS(uap->flags);
|
|
/* why not allow a non-read/write open for our lockd? */
|
|
if (((fmode & (FREAD | FWRITE)) == 0) || (fmode & O_CREAT))
|
|
return (EINVAL);
|
|
error = copyin(uap->u_fhp, &fhp, sizeof(fhp));
|
|
if (error != 0)
|
|
return(error);
|
|
/* find the mount point */
|
|
mp = vfs_busyfs(&fhp.fh_fsid);
|
|
if (mp == NULL)
|
|
return (ESTALE);
|
|
/* now give me my vnode, it gets returned to me locked */
|
|
error = VFS_FHTOVP(mp, &fhp.fh_fid, LK_EXCLUSIVE, &vp);
|
|
vfs_unbusy(mp);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
error = falloc_noinstall(td, &fp);
|
|
if (error != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
/*
|
|
* An extra reference on `fp' has been held for us by
|
|
* falloc_noinstall().
|
|
*/
|
|
|
|
#ifdef INVARIANTS
|
|
td->td_dupfd = -1;
|
|
#endif
|
|
error = vn_open_vnode(vp, fmode, td->td_ucred, td, fp);
|
|
if (error != 0) {
|
|
KASSERT(fp->f_ops == &badfileops,
|
|
("VOP_OPEN in fhopen() set f_ops"));
|
|
KASSERT(td->td_dupfd < 0,
|
|
("fhopen() encountered fdopen()"));
|
|
|
|
vput(vp);
|
|
goto bad;
|
|
}
|
|
#ifdef INVARIANTS
|
|
td->td_dupfd = 0;
|
|
#endif
|
|
fp->f_vnode = vp;
|
|
fp->f_seqcount = 1;
|
|
finit(fp, (fmode & FMASK) | (fp->f_flag & FHASLOCK), DTYPE_VNODE, vp,
|
|
&vnops);
|
|
VOP_UNLOCK(vp, 0);
|
|
if ((fmode & O_TRUNC) != 0) {
|
|
error = fo_truncate(fp, 0, td->td_ucred, td);
|
|
if (error != 0)
|
|
goto bad;
|
|
}
|
|
|
|
error = finstall(td, fp, &indx, fmode, NULL);
|
|
bad:
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = indx;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Stat an (NFS) file handle.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhstat_args {
|
|
struct fhandle *u_fhp;
|
|
struct stat *sb;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fhstat(td, uap)
|
|
struct thread *td;
|
|
register struct fhstat_args /* {
|
|
struct fhandle *u_fhp;
|
|
struct stat *sb;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct fhandle fh;
|
|
int error;
|
|
|
|
error = copyin(uap->u_fhp, &fh, sizeof(fh));
|
|
if (error != 0)
|
|
return (error);
|
|
error = kern_fhstat(td, fh, &sb);
|
|
if (error == 0)
|
|
error = copyout(&sb, uap->sb, sizeof(sb));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_fhstat(struct thread *td, struct fhandle fh, struct stat *sb)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
error = priv_check(td, PRIV_VFS_FHSTAT);
|
|
if (error != 0)
|
|
return (error);
|
|
if ((mp = vfs_busyfs(&fh.fh_fsid)) == NULL)
|
|
return (ESTALE);
|
|
error = VFS_FHTOVP(mp, &fh.fh_fid, LK_EXCLUSIVE, &vp);
|
|
vfs_unbusy(mp);
|
|
if (error != 0)
|
|
return (error);
|
|
error = vn_stat(vp, sb, td->td_ucred, NOCRED, td);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Implement fstatfs() for (NFS) file handles.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhstatfs_args {
|
|
struct fhandle *u_fhp;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fhstatfs(td, uap)
|
|
struct thread *td;
|
|
struct fhstatfs_args /* {
|
|
struct fhandle *u_fhp;
|
|
struct statfs *buf;
|
|
} */ *uap;
|
|
{
|
|
struct statfs sf;
|
|
fhandle_t fh;
|
|
int error;
|
|
|
|
error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t));
|
|
if (error != 0)
|
|
return (error);
|
|
error = kern_fhstatfs(td, fh, &sf);
|
|
if (error != 0)
|
|
return (error);
|
|
return (copyout(&sf, uap->buf, sizeof(sf)));
|
|
}
|
|
|
|
int
|
|
kern_fhstatfs(struct thread *td, fhandle_t fh, struct statfs *buf)
|
|
{
|
|
struct statfs *sp;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
error = priv_check(td, PRIV_VFS_FHSTATFS);
|
|
if (error != 0)
|
|
return (error);
|
|
if ((mp = vfs_busyfs(&fh.fh_fsid)) == NULL)
|
|
return (ESTALE);
|
|
error = VFS_FHTOVP(mp, &fh.fh_fid, LK_EXCLUSIVE, &vp);
|
|
if (error != 0) {
|
|
vfs_unbusy(mp);
|
|
return (error);
|
|
}
|
|
vput(vp);
|
|
error = prison_canseemount(td->td_ucred, mp);
|
|
if (error != 0)
|
|
goto out;
|
|
#ifdef MAC
|
|
error = mac_mount_check_stat(td->td_ucred, mp);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
/*
|
|
* Set these in case the underlying filesystem fails to do so.
|
|
*/
|
|
sp = &mp->mnt_stat;
|
|
sp->f_version = STATFS_VERSION;
|
|
sp->f_namemax = NAME_MAX;
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
error = VFS_STATFS(mp, sp);
|
|
if (error == 0)
|
|
*buf = *sp;
|
|
out:
|
|
vfs_unbusy(mp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_posix_fallocate(struct thread *td, int fd, off_t offset, off_t len)
|
|
{
|
|
struct file *fp;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
cap_rights_t rights;
|
|
off_t olen, ooffset;
|
|
int error;
|
|
|
|
if (offset < 0 || len <= 0)
|
|
return (EINVAL);
|
|
/* Check for wrap. */
|
|
if (offset > OFF_MAX - len)
|
|
return (EFBIG);
|
|
error = fget(td, fd, cap_rights_init(&rights, CAP_WRITE), &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
if ((fp->f_ops->fo_flags & DFLAG_SEEKABLE) == 0) {
|
|
error = ESPIPE;
|
|
goto out;
|
|
}
|
|
if ((fp->f_flag & FWRITE) == 0) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
if (fp->f_type != DTYPE_VNODE) {
|
|
error = ENODEV;
|
|
goto out;
|
|
}
|
|
vp = fp->f_vnode;
|
|
if (vp->v_type != VREG) {
|
|
error = ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
/* Allocating blocks may take a long time, so iterate. */
|
|
for (;;) {
|
|
olen = len;
|
|
ooffset = offset;
|
|
|
|
bwillwrite();
|
|
mp = NULL;
|
|
error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
|
|
if (error != 0)
|
|
break;
|
|
error = vn_lock(vp, LK_EXCLUSIVE);
|
|
if (error != 0) {
|
|
vn_finished_write(mp);
|
|
break;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_vnode_check_write(td->td_ucred, fp->f_cred, vp);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_ALLOCATE(vp, &offset, &len);
|
|
VOP_UNLOCK(vp, 0);
|
|
vn_finished_write(mp);
|
|
|
|
if (olen + ooffset != offset + len) {
|
|
panic("offset + len changed from %jx/%jx to %jx/%jx",
|
|
ooffset, olen, offset, len);
|
|
}
|
|
if (error != 0 || len == 0)
|
|
break;
|
|
KASSERT(olen > len, ("Iteration did not make progress?"));
|
|
maybe_yield();
|
|
}
|
|
out:
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_posix_fallocate(struct thread *td, struct posix_fallocate_args *uap)
|
|
{
|
|
|
|
td->td_retval[0] = kern_posix_fallocate(td, uap->fd, uap->offset,
|
|
uap->len);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Unlike madvise(2), we do not make a best effort to remember every
|
|
* possible caching hint. Instead, we remember the last setting with
|
|
* the exception that we will allow POSIX_FADV_NORMAL to adjust the
|
|
* region of any current setting.
|
|
*/
|
|
int
|
|
kern_posix_fadvise(struct thread *td, int fd, off_t offset, off_t len,
|
|
int advice)
|
|
{
|
|
struct fadvise_info *fa, *new;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
cap_rights_t rights;
|
|
off_t end;
|
|
int error;
|
|
|
|
if (offset < 0 || len < 0 || offset > OFF_MAX - len)
|
|
return (EINVAL);
|
|
switch (advice) {
|
|
case POSIX_FADV_SEQUENTIAL:
|
|
case POSIX_FADV_RANDOM:
|
|
case POSIX_FADV_NOREUSE:
|
|
new = malloc(sizeof(*fa), M_FADVISE, M_WAITOK);
|
|
break;
|
|
case POSIX_FADV_NORMAL:
|
|
case POSIX_FADV_WILLNEED:
|
|
case POSIX_FADV_DONTNEED:
|
|
new = NULL;
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
/* XXX: CAP_POSIX_FADVISE? */
|
|
error = fget(td, fd, cap_rights_init(&rights), &fp);
|
|
if (error != 0)
|
|
goto out;
|
|
if ((fp->f_ops->fo_flags & DFLAG_SEEKABLE) == 0) {
|
|
error = ESPIPE;
|
|
goto out;
|
|
}
|
|
if (fp->f_type != DTYPE_VNODE) {
|
|
error = ENODEV;
|
|
goto out;
|
|
}
|
|
vp = fp->f_vnode;
|
|
if (vp->v_type != VREG) {
|
|
error = ENODEV;
|
|
goto out;
|
|
}
|
|
if (len == 0)
|
|
end = OFF_MAX;
|
|
else
|
|
end = offset + len - 1;
|
|
switch (advice) {
|
|
case POSIX_FADV_SEQUENTIAL:
|
|
case POSIX_FADV_RANDOM:
|
|
case POSIX_FADV_NOREUSE:
|
|
/*
|
|
* Try to merge any existing non-standard region with
|
|
* this new region if possible, otherwise create a new
|
|
* non-standard region for this request.
|
|
*/
|
|
mtx_pool_lock(mtxpool_sleep, fp);
|
|
fa = fp->f_advice;
|
|
if (fa != NULL && fa->fa_advice == advice &&
|
|
((fa->fa_start <= end && fa->fa_end >= offset) ||
|
|
(end != OFF_MAX && fa->fa_start == end + 1) ||
|
|
(fa->fa_end != OFF_MAX && fa->fa_end + 1 == offset))) {
|
|
if (offset < fa->fa_start)
|
|
fa->fa_start = offset;
|
|
if (end > fa->fa_end)
|
|
fa->fa_end = end;
|
|
} else {
|
|
new->fa_advice = advice;
|
|
new->fa_start = offset;
|
|
new->fa_end = end;
|
|
new->fa_prevstart = 0;
|
|
new->fa_prevend = 0;
|
|
fp->f_advice = new;
|
|
new = fa;
|
|
}
|
|
mtx_pool_unlock(mtxpool_sleep, fp);
|
|
break;
|
|
case POSIX_FADV_NORMAL:
|
|
/*
|
|
* If a the "normal" region overlaps with an existing
|
|
* non-standard region, trim or remove the
|
|
* non-standard region.
|
|
*/
|
|
mtx_pool_lock(mtxpool_sleep, fp);
|
|
fa = fp->f_advice;
|
|
if (fa != NULL) {
|
|
if (offset <= fa->fa_start && end >= fa->fa_end) {
|
|
new = fa;
|
|
fp->f_advice = NULL;
|
|
} else if (offset <= fa->fa_start &&
|
|
end >= fa->fa_start)
|
|
fa->fa_start = end + 1;
|
|
else if (offset <= fa->fa_end && end >= fa->fa_end)
|
|
fa->fa_end = offset - 1;
|
|
else if (offset >= fa->fa_start && end <= fa->fa_end) {
|
|
/*
|
|
* If the "normal" region is a middle
|
|
* portion of the existing
|
|
* non-standard region, just remove
|
|
* the whole thing rather than picking
|
|
* one side or the other to
|
|
* preserve.
|
|
*/
|
|
new = fa;
|
|
fp->f_advice = NULL;
|
|
}
|
|
}
|
|
mtx_pool_unlock(mtxpool_sleep, fp);
|
|
break;
|
|
case POSIX_FADV_WILLNEED:
|
|
case POSIX_FADV_DONTNEED:
|
|
error = VOP_ADVISE(vp, offset, end, advice);
|
|
break;
|
|
}
|
|
out:
|
|
if (fp != NULL)
|
|
fdrop(fp, td);
|
|
free(new, M_FADVISE);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_posix_fadvise(struct thread *td, struct posix_fadvise_args *uap)
|
|
{
|
|
|
|
td->td_retval[0] = kern_posix_fadvise(td, uap->fd, uap->offset,
|
|
uap->len, uap->advice);
|
|
return (0);
|
|
}
|