/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * This code is issued under the GNU General Public License.
- * See the file COPYING in this distribution
+ * Copyright (c) 2001, 2002 Cluster File Systems, Inc.
*
- * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
+ * This file is part of Lustre, http://www.lustre.org.
*
+ * 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.
+ *
+ * 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.
+ *
+ * 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.
*/
#include <linux/fs.h>
-#include <linux/locks.h>
+#include <linux/sched.h>
+#include <linux/smp_lock.h>
#include <linux/quotaops.h>
#define DEBUG_SUBSYSTEM S_LLITE
#include <linux/obd_support.h>
#include <linux/lustre_lite.h>
+#include <linux/lustre_idl.h>
#include <linux/lustre_dlm.h>
extern struct address_space_operations ll_aops;
-void ll_intent_release(struct dentry *de)
+void ll_release(struct dentry *de)
+{
+ ENTRY;
+
+ OBD_FREE(de->d_fsdata, sizeof(struct ll_dentry_data));
+ EXIT;
+}
+
+extern void d_delete_aliases(struct inode *);
+void ll_intent_release(struct dentry *de, struct lookup_intent *it)
{
struct lustre_handle *handle;
ENTRY;
- if (de->d_it == NULL) {
+ /* XXX the check for RENAME2 is a workaround for old kernels
+ which call intent_release twice in rename
+ */
+ if (it == NULL || it->it_op == IT_RENAME2) {
EXIT;
return;
}
- if (de->d_it->it_lock_mode) {
- handle = (struct lustre_handle *)de->d_it->it_lock_handle;
- if (de->d_it->it_op == IT_SETATTR) {
+
+ LASSERT(ll_d2d(de) != NULL);
+
+ if (it->it_lock_mode) {
+ handle = (struct lustre_handle *)it->it_lock_handle;
+ if (it->it_op == IT_SETATTR) {
int rc;
- ldlm_lock_decref(handle, de->d_it->it_lock_mode);
+ ldlm_lock_decref(handle, it->it_lock_mode);
rc = ldlm_cli_cancel(handle);
if (rc < 0)
CERROR("ldlm_cli_cancel: %d\n", rc);
} else
- ldlm_lock_decref(handle, de->d_it->it_lock_mode);
+ ldlm_lock_decref(handle, it->it_lock_mode);
}
- de->d_it = NULL;
+
+ if (it->it_op == IT_RELEASED_MAGIC) {
+ EXIT;
+ return;
+ }
+
+ if (de->d_it && de->d_it == it) {
+ de->d_it = NULL;
+ up(&ll_d2d(de)->lld_it_sem);
+ it->it_op = IT_RELEASED_MAGIC;
+ }
+
EXIT;
}
-int ll_revalidate2(struct dentry *de, int flags, struct lookup_intent *it)
+extern struct dentry *ll_find_alias(struct inode *, struct dentry *);
+
+static int revalidate2_finish(int flag, struct ptlrpc_request *request,
+ struct dentry **de,
+ struct lookup_intent *it,
+ int offset, obd_id ino)
{
- struct ll_sb_info *sbi = ll_s2sbi(de->d_sb);
+ ldlm_lock_set_data((struct lustre_handle *)it->it_lock_handle,
+ (*de)->d_inode, sizeof(*((*de)->d_inode)));
+ ptlrpc_req_finished(request);
+ return 0;
+}
+
+static int ll_have_lock(struct dentry *de)
+{
+ struct ll_sb_info *sbi = ll_s2sbi(de->d_sb);
struct lustre_handle lockh;
__u64 res_id[RES_NAME_SIZE] = {0};
struct obd_device *obddev;
ENTRY;
- if (it)
- RETURN(0); /* lookups will have NULL it */
-
- if (!de->d_inode)
- RETURN(0);
+ if (!de->d_inode)
+ RETURN(0);
obddev = class_conn2obd(&sbi->ll_mdc_conn);
res_id[0] = de->d_inode->i_ino;
CDEBUG(D_INFO, "trying to match res "LPU64"\n", res_id[0]);
- if (ldlm_lock_match(obddev->obd_namespace, res_id, LDLM_MDSINTENT,
+ if (ldlm_lock_match(obddev->obd_namespace, res_id, LDLM_PLAIN,
NULL, 0, LCK_PR, &lockh)) {
ldlm_lock_decref(&lockh, LCK_PR);
RETURN(1);
}
- if (ldlm_lock_match(obddev->obd_namespace, res_id, LDLM_MDSINTENT,
+ if (ldlm_lock_match(obddev->obd_namespace, res_id, LDLM_PLAIN,
NULL, 0, LCK_PW, &lockh)) {
ldlm_lock_decref(&lockh, LCK_PW);
RETURN(1);
}
+ RETURN(0);
+}
+
+int ll_revalidate2(struct dentry *de, int flags, struct lookup_intent *it)
+{
+ int rc;
+ ENTRY;
+
+ /* We don't want to cache negative dentries, so return 0 immediately.
+ * We believe that this is safe, that negative dentries cannot be
+ * pinned by someone else */
+ if (de->d_inode == NULL) {
+ CDEBUG(D_INODE, "negative dentry: ret 0 to force lookup2\n");
+ RETURN(0);
+ }
+
+ if (ll_have_lock(de))
+ GOTO(out, rc = 0);
+
+ rc = ll_intent_lock(de->d_parent->d_inode, &de, it, revalidate2_finish);
+ if (rc < 0) {
+ /* Something bad happened; overwrite it_status? */
+ CERROR("ll_intent_lock: %d\n", rc);
+ }
+ /* unfortunately ll_intent_lock may cause a callback and revoke our
+ dentry */
+ spin_lock(&dcache_lock);
+ list_del_init(&de->d_hash);
+ spin_unlock(&dcache_lock);
+ d_rehash(de);
+
+ out:
+ if (!it)
+ de->d_it = NULL;
+
+ RETURN(1);
+}
+
+int ll_set_dd(struct dentry *de)
+{
+ ENTRY;
+ LASSERT(de != NULL);
+
+ lock_kernel();
+
+ if (de->d_fsdata != NULL) {
+ CERROR("dentry %p already has d_fsdata set\n", de);
+ } else {
+ OBD_ALLOC(de->d_fsdata, sizeof(struct ll_dentry_data));
+ sema_init(&ll_d2d(de)->lld_it_sem, 1);
+ }
+
+ unlock_kernel();
RETURN(0);
}
struct dentry_operations ll_d_ops = {
- d_revalidate2: ll_revalidate2,
- d_intent_release: ll_intent_release
+ .d_revalidate2 = ll_revalidate2,
+ .d_intent_release = ll_intent_release,
+ .d_release = ll_release,
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff