/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ /* All Rights Reserved */ /* * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2013 Nexenta Systems, Inc. All rights reserved. */ #include <sys/types.h> #include <sys/param.h> #include <sys/errno.h> #include <sys/vnode.h> #include <sys/nvpair.h> #include <sys/uio.h> #include <sys/kmem.h> #include <fs/fs_subr.h> #include <fs/fs_reparse.h> /* * support functions for reparse point * copied from uts/common/fs/fs_subr.c */ /* * reparse_vnode_parse * * Read the symlink data of a reparse point specified by the vnode * and return the reparse data as name-value pair in the nvlist. */ int reparse_vnode_parse(vnode_t *vp, nvlist_t *nvl) { int err; char *lkdata; struct uio uio; struct iovec iov; if (vp == NULL || nvl == NULL) return (EINVAL); lkdata = kmem_alloc(MAXREPARSELEN, KM_SLEEP); /* * Set up io vector to read sym link data */ iov.iov_base = lkdata; iov.iov_len = MAXREPARSELEN; uio.uio_iov = &iov; uio.uio_iovcnt = 1; uio.uio_segflg = UIO_SYSSPACE; uio.uio_extflg = UIO_COPY_CACHED; uio.uio_loffset = (offset_t)0; uio.uio_resid = MAXREPARSELEN; if ((err = VOP_READLINK(vp, &uio, zone_kcred(), NULL)) == 0) { *(lkdata + MAXREPARSELEN - uio.uio_resid) = '\0'; err = reparse_parse(lkdata, nvl); } kmem_free(lkdata, MAXREPARSELEN); /* done with lkdata */ return (err); }