766 lines
17 KiB
C
766 lines
17 KiB
C
/*-
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* Copyright (c) 1999-2001 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed by Robert Watson for the TrustedBSD Project.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/capsicum.h>
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#include <sys/lock.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/fcntl.h>
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#include <sys/namei.h>
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#include <sys/filedesc.h>
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#include <sys/limits.h>
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#include <sys/vnode.h>
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#include <sys/proc.h>
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#include <sys/extattr.h>
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#include <security/audit/audit.h>
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#include <security/mac/mac_framework.h>
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/*
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* Syscall to push extended attribute configuration information into the VFS.
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* Accepts a path, which it converts to a mountpoint, as well as a command
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* (int cmd), and attribute name and misc data.
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*
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* Currently this is used only by UFS1 extended attributes.
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*/
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int
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sys_extattrctl(td, uap)
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struct thread *td;
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struct extattrctl_args /* {
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const char *path;
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int cmd;
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const char *filename;
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int attrnamespace;
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const char *attrname;
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} */ *uap;
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{
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struct vnode *filename_vp;
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struct nameidata nd;
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struct mount *mp, *mp_writable;
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char attrname[EXTATTR_MAXNAMELEN];
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int error;
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AUDIT_ARG_CMD(uap->cmd);
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AUDIT_ARG_VALUE(uap->attrnamespace);
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/*
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* uap->attrname is not always defined. We check again later when we
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* invoke the VFS call so as to pass in NULL there if needed.
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*/
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if (uap->attrname != NULL) {
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error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN,
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NULL);
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if (error)
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return (error);
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}
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AUDIT_ARG_TEXT(attrname);
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mp = NULL;
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filename_vp = NULL;
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if (uap->filename != NULL) {
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NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE2,
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UIO_USERSPACE, uap->filename, td);
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error = namei(&nd);
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if (error)
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return (error);
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filename_vp = nd.ni_vp;
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NDFREE(&nd, NDF_NO_VP_RELE);
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}
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/* uap->path is always defined. */
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNODE1,
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UIO_USERSPACE, uap->path, td);
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error = namei(&nd);
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if (error)
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goto out;
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mp = nd.ni_vp->v_mount;
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error = vfs_busy(mp, 0);
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if (error) {
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NDFREE(&nd, 0);
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mp = NULL;
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goto out;
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}
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VOP_UNLOCK(nd.ni_vp, 0);
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error = vn_start_write(nd.ni_vp, &mp_writable, V_WAIT | PCATCH);
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NDFREE(&nd, NDF_NO_VP_UNLOCK);
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if (error)
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goto out;
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if (filename_vp != NULL) {
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/*
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* uap->filename is not always defined. If it is,
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* grab a vnode lock, which VFS_EXTATTRCTL() will
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* later release.
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*/
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error = vn_lock(filename_vp, LK_EXCLUSIVE);
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if (error) {
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vn_finished_write(mp_writable);
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goto out;
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}
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}
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error = VFS_EXTATTRCTL(mp, uap->cmd, filename_vp, uap->attrnamespace,
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uap->attrname != NULL ? attrname : NULL);
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vn_finished_write(mp_writable);
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out:
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if (mp != NULL)
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vfs_unbusy(mp);
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/*
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* VFS_EXTATTRCTL will have unlocked, but not de-ref'd, filename_vp,
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* so vrele it if it is defined.
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*/
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if (filename_vp != NULL)
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vrele(filename_vp);
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return (error);
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}
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/*-
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* Set a named extended attribute on a file or directory
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*
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* Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",
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* kernelspace string pointer "attrname", userspace buffer
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* pointer "data", buffer length "nbytes", thread "td".
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* Returns: 0 on success, an error number otherwise
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* Locks: none
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* References: vp must be a valid reference for the duration of the call
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*/
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static int
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extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname,
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void *data, size_t nbytes, struct thread *td)
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{
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struct mount *mp;
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struct uio auio;
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struct iovec aiov;
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ssize_t cnt;
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int error;
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error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
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if (error)
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return (error);
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
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aiov.iov_base = data;
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aiov.iov_len = nbytes;
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auio.uio_iov = &aiov;
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auio.uio_iovcnt = 1;
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auio.uio_offset = 0;
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if (nbytes > IOSIZE_MAX) {
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error = EINVAL;
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goto done;
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}
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auio.uio_resid = nbytes;
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auio.uio_rw = UIO_WRITE;
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auio.uio_segflg = UIO_USERSPACE;
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auio.uio_td = td;
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cnt = nbytes;
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#ifdef MAC
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error = mac_vnode_check_setextattr(td->td_ucred, vp, attrnamespace,
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attrname);
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if (error)
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goto done;
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#endif
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error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio,
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td->td_ucred, td);
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cnt -= auio.uio_resid;
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td->td_retval[0] = cnt;
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done:
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VOP_UNLOCK(vp, 0);
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vn_finished_write(mp);
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return (error);
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}
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int
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sys_extattr_set_fd(td, uap)
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struct thread *td;
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struct extattr_set_fd_args /* {
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int fd;
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int attrnamespace;
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const char *attrname;
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void *data;
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size_t nbytes;
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} */ *uap;
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{
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struct file *fp;
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char attrname[EXTATTR_MAXNAMELEN];
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cap_rights_t rights;
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int error;
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AUDIT_ARG_FD(uap->fd);
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AUDIT_ARG_VALUE(uap->attrnamespace);
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error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
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if (error)
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return (error);
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AUDIT_ARG_TEXT(attrname);
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error = getvnode(td, uap->fd,
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cap_rights_init(&rights, CAP_EXTATTR_SET), &fp);
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if (error)
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return (error);
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error = extattr_set_vp(fp->f_vnode, uap->attrnamespace,
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attrname, uap->data, uap->nbytes, td);
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fdrop(fp, td);
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return (error);
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}
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int
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sys_extattr_set_file(td, uap)
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struct thread *td;
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struct extattr_set_file_args /* {
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const char *path;
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int attrnamespace;
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const char *attrname;
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void *data;
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size_t nbytes;
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} */ *uap;
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{
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struct nameidata nd;
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char attrname[EXTATTR_MAXNAMELEN];
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int error;
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AUDIT_ARG_VALUE(uap->attrnamespace);
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error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
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if (error)
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return (error);
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AUDIT_ARG_TEXT(attrname);
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NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE1, UIO_USERSPACE,
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uap->path, td);
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error = namei(&nd);
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if (error)
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return (error);
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NDFREE(&nd, NDF_ONLY_PNBUF);
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error = extattr_set_vp(nd.ni_vp, uap->attrnamespace, attrname,
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uap->data, uap->nbytes, td);
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vrele(nd.ni_vp);
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return (error);
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}
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int
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sys_extattr_set_link(td, uap)
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struct thread *td;
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struct extattr_set_link_args /* {
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const char *path;
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int attrnamespace;
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const char *attrname;
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void *data;
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size_t nbytes;
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} */ *uap;
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{
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struct nameidata nd;
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char attrname[EXTATTR_MAXNAMELEN];
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int error;
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AUDIT_ARG_VALUE(uap->attrnamespace);
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error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
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if (error)
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return (error);
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AUDIT_ARG_TEXT(attrname);
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NDINIT(&nd, LOOKUP, NOFOLLOW | AUDITVNODE1, UIO_USERSPACE,
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uap->path, td);
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error = namei(&nd);
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if (error)
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return (error);
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NDFREE(&nd, NDF_ONLY_PNBUF);
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error = extattr_set_vp(nd.ni_vp, uap->attrnamespace, attrname,
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uap->data, uap->nbytes, td);
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vrele(nd.ni_vp);
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return (error);
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}
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/*-
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* Get a named extended attribute on a file or directory
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*
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* Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",
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* kernelspace string pointer "attrname", userspace buffer
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* pointer "data", buffer length "nbytes", thread "td".
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* Returns: 0 on success, an error number otherwise
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* Locks: none
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* References: vp must be a valid reference for the duration of the call
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*/
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static int
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extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname,
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void *data, size_t nbytes, struct thread *td)
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{
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struct uio auio, *auiop;
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struct iovec aiov;
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ssize_t cnt;
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size_t size, *sizep;
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int error;
|
|
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vn_lock(vp, LK_SHARED | LK_RETRY);
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|
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/*
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* Slightly unusual semantics: if the user provides a NULL data
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* pointer, they don't want to receive the data, just the maximum
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* read length.
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*/
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auiop = NULL;
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sizep = NULL;
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cnt = 0;
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if (data != NULL) {
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aiov.iov_base = data;
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aiov.iov_len = nbytes;
|
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auio.uio_iov = &aiov;
|
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auio.uio_iovcnt = 1;
|
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auio.uio_offset = 0;
|
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if (nbytes > IOSIZE_MAX) {
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error = EINVAL;
|
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goto done;
|
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}
|
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auio.uio_resid = nbytes;
|
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auio.uio_rw = UIO_READ;
|
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auio.uio_segflg = UIO_USERSPACE;
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auio.uio_td = td;
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auiop = &auio;
|
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cnt = nbytes;
|
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} else
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sizep = &size;
|
|
|
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#ifdef MAC
|
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error = mac_vnode_check_getextattr(td->td_ucred, vp, attrnamespace,
|
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attrname);
|
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if (error)
|
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goto done;
|
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#endif
|
|
|
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error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep,
|
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td->td_ucred, td);
|
|
|
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if (auiop != NULL) {
|
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cnt -= auio.uio_resid;
|
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td->td_retval[0] = cnt;
|
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} else
|
|
td->td_retval[0] = size;
|
|
|
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done:
|
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VOP_UNLOCK(vp, 0);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_get_fd(td, uap)
|
|
struct thread *td;
|
|
struct extattr_get_fd_args /* {
|
|
int fd;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
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AUDIT_ARG_FD(uap->fd);
|
|
AUDIT_ARG_VALUE(uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
AUDIT_ARG_TEXT(attrname);
|
|
|
|
error = getvnode(td, uap->fd,
|
|
cap_rights_init(&rights, CAP_EXTATTR_GET), &fp);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = extattr_get_vp(fp->f_vnode, uap->attrnamespace,
|
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attrname, uap->data, uap->nbytes, td);
|
|
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_get_file(td, uap)
|
|
struct thread *td;
|
|
struct extattr_get_file_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
AUDIT_ARG_VALUE(uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
AUDIT_ARG_TEXT(attrname);
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE1, UIO_USERSPACE, uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
error = extattr_get_vp(nd.ni_vp, uap->attrnamespace, attrname,
|
|
uap->data, uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_get_link(td, uap)
|
|
struct thread *td;
|
|
struct extattr_get_link_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
AUDIT_ARG_VALUE(uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
AUDIT_ARG_TEXT(attrname);
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | AUDITVNODE1, UIO_USERSPACE, uap->path,
|
|
td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
error = extattr_get_vp(nd.ni_vp, uap->attrnamespace, attrname,
|
|
uap->data, uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* extattr_delete_vp(): Delete a named extended attribute on a file or
|
|
* directory
|
|
*
|
|
* Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",
|
|
* kernelspace string pointer "attrname", proc "p"
|
|
* Returns: 0 on success, an error number otherwise
|
|
* Locks: none
|
|
* References: vp must be a valid reference for the duration of the call
|
|
*/
|
|
static int
|
|
extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname,
|
|
struct thread *td)
|
|
{
|
|
struct mount *mp;
|
|
int error;
|
|
|
|
error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
|
|
if (error)
|
|
return (error);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
|
|
#ifdef MAC
|
|
error = mac_vnode_check_deleteextattr(td->td_ucred, vp, attrnamespace,
|
|
attrname);
|
|
if (error)
|
|
goto done;
|
|
#endif
|
|
|
|
error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, td->td_ucred,
|
|
td);
|
|
if (error == EOPNOTSUPP)
|
|
error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL,
|
|
td->td_ucred, td);
|
|
#ifdef MAC
|
|
done:
|
|
#endif
|
|
VOP_UNLOCK(vp, 0);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_delete_fd(td, uap)
|
|
struct thread *td;
|
|
struct extattr_delete_fd_args /* {
|
|
int fd;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
AUDIT_ARG_VALUE(uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
AUDIT_ARG_TEXT(attrname);
|
|
|
|
error = getvnode(td, uap->fd,
|
|
cap_rights_init(&rights, CAP_EXTATTR_DELETE), &fp);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = extattr_delete_vp(fp->f_vnode, uap->attrnamespace,
|
|
attrname, td);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_delete_file(td, uap)
|
|
struct thread *td;
|
|
struct extattr_delete_file_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
AUDIT_ARG_VALUE(uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return(error);
|
|
AUDIT_ARG_TEXT(attrname);
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE1, UIO_USERSPACE, uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return(error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
error = extattr_delete_vp(nd.ni_vp, uap->attrnamespace, attrname, td);
|
|
vrele(nd.ni_vp);
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_delete_link(td, uap)
|
|
struct thread *td;
|
|
struct extattr_delete_link_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
AUDIT_ARG_VALUE(uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return(error);
|
|
AUDIT_ARG_TEXT(attrname);
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | AUDITVNODE1, UIO_USERSPACE, uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return(error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
error = extattr_delete_vp(nd.ni_vp, uap->attrnamespace, attrname, td);
|
|
vrele(nd.ni_vp);
|
|
return(error);
|
|
}
|
|
|
|
/*-
|
|
* Retrieve a list of extended attributes on a file or directory.
|
|
*
|
|
* Arguments: unlocked vnode "vp", attribute namespace 'attrnamespace",
|
|
* userspace buffer pointer "data", buffer length "nbytes",
|
|
* thread "td".
|
|
* Returns: 0 on success, an error number otherwise
|
|
* Locks: none
|
|
* References: vp must be a valid reference for the duration of the call
|
|
*/
|
|
static int
|
|
extattr_list_vp(struct vnode *vp, int attrnamespace, void *data,
|
|
size_t nbytes, struct thread *td)
|
|
{
|
|
struct uio auio, *auiop;
|
|
size_t size, *sizep;
|
|
struct iovec aiov;
|
|
ssize_t cnt;
|
|
int error;
|
|
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
|
|
auiop = NULL;
|
|
sizep = NULL;
|
|
cnt = 0;
|
|
if (data != NULL) {
|
|
aiov.iov_base = data;
|
|
aiov.iov_len = nbytes;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
|
if (nbytes > IOSIZE_MAX) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
auio.uio_resid = nbytes;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_td = td;
|
|
auiop = &auio;
|
|
cnt = nbytes;
|
|
} else
|
|
sizep = &size;
|
|
|
|
#ifdef MAC
|
|
error = mac_vnode_check_listextattr(td->td_ucred, vp, attrnamespace);
|
|
if (error)
|
|
goto done;
|
|
#endif
|
|
|
|
error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep,
|
|
td->td_ucred, td);
|
|
|
|
if (auiop != NULL) {
|
|
cnt -= auio.uio_resid;
|
|
td->td_retval[0] = cnt;
|
|
} else
|
|
td->td_retval[0] = size;
|
|
|
|
done:
|
|
VOP_UNLOCK(vp, 0);
|
|
return (error);
|
|
}
|
|
|
|
|
|
int
|
|
sys_extattr_list_fd(td, uap)
|
|
struct thread *td;
|
|
struct extattr_list_fd_args /* {
|
|
int fd;
|
|
int attrnamespace;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
AUDIT_ARG_VALUE(uap->attrnamespace);
|
|
error = getvnode(td, uap->fd,
|
|
cap_rights_init(&rights, CAP_EXTATTR_LIST), &fp);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = extattr_list_vp(fp->f_vnode, uap->attrnamespace, uap->data,
|
|
uap->nbytes, td);
|
|
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_list_file(td, uap)
|
|
struct thread*td;
|
|
struct extattr_list_file_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
AUDIT_ARG_VALUE(uap->attrnamespace);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE1, UIO_USERSPACE, uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
error = extattr_list_vp(nd.ni_vp, uap->attrnamespace, uap->data,
|
|
uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_list_link(td, uap)
|
|
struct thread*td;
|
|
struct extattr_list_link_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
AUDIT_ARG_VALUE(uap->attrnamespace);
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | AUDITVNODE1, UIO_USERSPACE, uap->path,
|
|
td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
error = extattr_list_vp(nd.ni_vp, uap->attrnamespace, uap->data,
|
|
uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|