+++ /dev/null
-/*
- * This Cplant(TM) source code is the property of Sandia National
- * Laboratories.
- *
- * This Cplant(TM) source code is copyrighted by Sandia National
- * Laboratories.
- *
- * The redistribution of this Cplant(TM) source code is subject to the
- * terms of the GNU Lesser General Public License
- * (see cit/LGPL or http://www.gnu.org/licenses/lgpl.html)
- *
- * Cplant(TM) Copyright 1998-2003 Sandia Corporation.
- * Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
- * license for use of this work by or on behalf of the US Government.
- * Export of this program may require a license from the United States
- * Government.
- */
-
-/*
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Questions or comments about this library should be sent to:
- *
- * Lee Ward
- * Sandia National Laboratories, New Mexico
- * P.O. Box 5800
- * Albuquerque, NM 87185-1110
- *
- * lee@sandia.gov
- */
-
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <assert.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <sys/queue.h>
-
-#include "sysio.h"
-#include "mount.h"
-#include "inode.h"
-
-int
-SYSIO_INTERFACE_NAME(rename)(const char *oldpath, const char *newpath)
-{
- struct intent intent;
- int err;
- struct pnode *old, *new;
- struct pnode_base *nxtpb, *pb;
- SYSIO_INTERFACE_DISPLAY_BLOCK;
-
- SYSIO_INTERFACE_ENTER;
-
- /*
- * Neither old nor new may be the empty string.
- */
- if (*oldpath == '\0' || *newpath == '\0')
- SYSIO_INTERFACE_RETURN(-1, -ENOENT);
-
- /*
- * Resolve oldpath to a path node.
- */
- INTENT_INIT(&intent, INT_UPDPARENT, NULL, NULL);
- err = _sysio_namei(_sysio_cwd, oldpath, ND_NOFOLLOW, &intent, &old);
- if (err)
- goto error3;
- /*
- * Resolve newpath to a path node.
- */
- INTENT_INIT(&intent, INT_UPDPARENT, NULL, NULL);
- err =
- _sysio_namei(_sysio_cwd,
- newpath,
- ND_NOFOLLOW | ND_NEGOK,
- &intent,
- &new);
- if (err)
- goto error2;
-
- /*
- * Don't allow mount points to move.
- */
- if (old->p_mount->mnt_root == old || old->p_cover ||
- new->p_mount->mnt_root == new) {
- err = -EBUSY;
- goto error1;
- }
-
- /*
- * No xdev renames either.
- */
- if (old->p_mount->mnt_fs != new->p_mount->mnt_fs) {
- err = -EXDEV;
- goto error1;
- }
-
- /*
- * Make sure the old pnode can't be found in the ancestor chain
- * for the new. If it can, they are trying to move into a subdirectory
- * of the old.
- */
- nxtpb = new->p_base;
- do {
- pb = nxtpb;
- nxtpb = pb->pb_parent;
- if (pb == old->p_base) {
- err = -EINVAL;
- goto error1;
- }
- } while (nxtpb);
-
- /*
- * If old == new, we're done.
- */
- if (old->p_base->pb_ino == new->p_base->pb_ino)
- goto short_out;
-
- if (new->p_base->pb_ino) {
- /*
- * Existing entry. We're replacing the new. Make sure that's
- * ok.
- */
- if (S_ISDIR(new->p_base->pb_ino->i_stbuf.st_mode)) {
- if (!S_ISDIR(old->p_base->pb_ino->i_stbuf.st_mode)) {
- err = -EISDIR;
- goto error1;
- }
- if (new->p_base->pb_ino->i_stbuf.st_nlink > 2) {
- err = -ENOTEMPTY;
- goto error1;
- }
- } else if (S_ISDIR(old->p_base->pb_ino->i_stbuf.st_mode)) {
- err = -ENOTDIR;
- goto error1;
- }
- }
-
- /*
- * It's not impossible to clean up the altered name space after
- * a rename. However, it is onerous and I don't want to do it right
- * now. If it becomes an issue, we can do it later. For now, I've
- * elected to use the semantic that says, basically, the entire
- * sub-tree must be unreferenced. That's per POSIX, but it's a nasty
- * thing to do to the caller.
- */
- if (_sysio_p_prune(new) != 1) {
- err = -EBUSY;
- goto error1;
- }
- /*
- * Use the parent node operations to request the task in case the
- * driver is implemented using differentiated inode operations based
- * on file type, such as incore does.
- */
- err = old->p_parent->p_base->pb_ino->i_ops.inop_rename(old, new);
- if (err)
- goto error1;
- /*
- * Reflect the successful rename in the active name space graph.
- */
- if (new->p_base->pb_ino)
- I_GONE(new->p_base->pb_ino);
- new->p_base->pb_ino = old->p_base->pb_ino;
- old->p_base->pb_ino = NULL;
-
-short_out:
-error1:
- P_RELE(new);
-error2:
- P_RELE(old);
-error3:
- if (err)
- goto out;
-out:
- SYSIO_INTERFACE_RETURN(err ? -1 : 0, err);
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff