/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Copyright (c) 2002 Cluster File Systems, Inc.
+ * GPL HEADER START
*
- * This file is part of Lustre, http://www.lustre.org.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * Lustre 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 General Public License for more details.
+ * This program 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
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*/
#include <linux/fs.h>
GOTO (failed, rc);
}
- body = lustre_msg_buf((*request)->rq_repmsg, REPLY_REC_OFF,
- sizeof(*body));
+ body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
LASSERT(body != NULL);
- LASSERT_REPSWABBED(*request, REPLY_REC_OFF);
-
if ((body->valid & OBD_MD_LINKNAME) == 0) {
CERROR("OBD_MD_LINKNAME not set on reply\n");
GOTO(failed, rc = -EPROTO);
}
-
+
LASSERT(symlen != 0);
if (body->eadatasize != symlen) {
CERROR("inode %lu: symlink length %d not expected %d\n",
GOTO(failed, rc = -EPROTO);
}
- *symname = lustre_msg_buf((*request)->rq_repmsg, REPLY_REC_OFF + 1,
- symlen);
+ *symname = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_MD);
if (*symname == NULL ||
- strnlen (*symname, symlen) != symlen - 1) {
+ strnlen(*symname, symlen) != symlen - 1) {
/* not full/NULL terminated */
CERROR("inode %lu: symlink not NULL terminated string"
"of length %d\n", inode->i_ino, symlen - 1);
static int ll_readlink(struct dentry *dentry, char *buffer, int buflen)
{
struct inode *inode = dentry->d_inode;
- struct ll_inode_info *lli = ll_i2info(inode);
struct ptlrpc_request *request;
char *symname;
int rc;
CDEBUG(D_VFSTRACE, "VFS Op\n");
/* on symlinks lli_open_sem protects lli_symlink_name allocation/data */
- down(&lli->lli_size_sem);
+ ll_inode_size_lock(inode, 0);
rc = ll_readlink_internal(inode, &request, &symname);
if (rc)
GOTO(out, rc);
rc = vfs_readlink(dentry, buffer, buflen, symname);
ptlrpc_req_finished(request);
out:
- up(&lli->lli_size_sem);
+ ll_inode_size_unlock(inode, 0);
RETURN(rc);
}
struct nameidata *nd)
{
struct inode *inode = dentry->d_inode;
- struct ll_inode_info *lli = ll_i2info(inode);
-#ifdef LUSTRE_KERNEL_VERSION
+#ifdef HAVE_VFS_INTENT_PATCHES
struct lookup_intent *it = ll_nd2it(nd);
#endif
- struct ptlrpc_request *request;
+ struct ptlrpc_request *request = NULL;
int rc;
char *symname;
ENTRY;
-#ifdef LUSTRE_KERNEL_VERSION
+#ifdef HAVE_VFS_INTENT_PATCHES
if (it != NULL) {
int op = it->it_op;
int mode = it->it_create_mode;
#endif
CDEBUG(D_VFSTRACE, "VFS Op\n");
- down(&lli->lli_size_sem);
- rc = ll_readlink_internal(inode, &request, &symname);
- up(&lli->lli_size_sem);
+ /* Limit the recursive symlink depth to 5 instead of default
+ * 8 links when kernel has 4k stack to prevent stack overflow. */
+ if (THREAD_SIZE < 8192 && current->link_count >= 5) {
+ rc = -ELOOP;
+ } else {
+ ll_inode_size_lock(inode, 0);
+ rc = ll_readlink_internal(inode, &request, &symname);
+ ll_inode_size_unlock(inode, 0);
+ }
if (rc) {
path_release(nd); /* Kernel assumes that ->follow_link()
releases nameidata on error */
struct inode_operations ll_fast_symlink_inode_operations = {
.readlink = ll_readlink,
.setattr = ll_setattr,
-#ifdef LUSTRE_KERNEL_VERSION
+#ifdef HAVE_VFS_INTENT_PATCHES
.setattr_raw = ll_setattr_raw,
#endif
.follow_link = ll_follow_link,
git://git.whamcloud.com / fs / lustre-release.git / blobdiff