1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2001, 2002 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include <linux/sched.h>
24 #include <linux/smp_lock.h>
25 #include <linux/quotaops.h>
27 #define DEBUG_SUBSYSTEM S_LLITE
29 #include <linux/obd_support.h>
30 #include <linux/lustre_lite.h>
31 #include <linux/lustre_dlm.h>
33 extern struct address_space_operations ll_aops;
35 void ll_release(struct dentry *de)
39 OBD_FREE(de->d_fsdata, sizeof(struct ll_dentry_data));
43 extern void d_delete_aliases(struct inode *);
44 void ll_intent_release(struct dentry *de, struct lookup_intent *it)
46 struct lustre_handle *handle;
49 if (it == NULL || it->it_op == IT_RENAME2) {
54 LASSERT(ll_d2d(de) != NULL);
56 if (it->it_lock_mode) {
57 handle = (struct lustre_handle *)it->it_lock_handle;
58 if (it->it_op == IT_SETATTR) {
60 struct inode *inode = de->d_inode;
61 ldlm_lock_decref(handle, it->it_lock_mode);
62 rc = ldlm_cli_cancel(handle);
64 CERROR("ldlm_cli_cancel: %d\n", rc);
65 /* XXX should we only do this when the last lock goes? */
66 LASSERT(igrab(inode) == inode);
67 d_delete_aliases(inode);
70 ldlm_lock_decref(handle, it->it_lock_mode);
73 if (it->it_op != IT_RELEASED_MAGIC) {
74 up(&ll_d2d(de)->lld_it_sem);
75 it->it_op = IT_RELEASED_MAGIC;
80 extern struct dentry *ll_find_alias(struct inode *, struct dentry *);
82 static int revalidate2_finish(int flag, struct ptlrpc_request *request,
84 struct lookup_intent *it,
85 int offset, obd_id ino)
87 ldlm_lock_set_data((struct lustre_handle *)it->it_lock_handle,
88 (*de)->d_inode, sizeof(*((*de)->d_inode)));
89 ptlrpc_req_finished(request);
93 int ll_revalidate2(struct dentry *de, int flags, struct lookup_intent *it)
98 /* We don't want to cache negative dentries, so return 0 immediately.
99 * We believe that this is safe, that negative dentries cannot be
100 * pinned by someone else */
101 if (de->d_inode == NULL) {
102 CDEBUG(D_INODE, "negative dentry: ret 0 to force lookup2\n");
106 rc = ll_intent_lock(de->d_parent->d_inode, &de, it, revalidate2_finish);
108 /* Something bad happened; overwrite it_status? */
109 CERROR("ll_intent_lock: %d\n", rc);
111 /* unfortunately ll_intent_lock may cause a callback and revoke our
113 spin_lock(&dcache_lock);
114 list_del_init(&de->d_hash);
115 spin_unlock(&dcache_lock);
119 LL_SAVE_INTENT(de, it);
127 int ll_set_dd(struct dentry *de)
134 if (de->d_fsdata != NULL) {
135 CERROR("dentry %p already has d_fsdata set\n", de);
137 OBD_ALLOC(de->d_fsdata, sizeof(struct ll_dentry_data));
138 sema_init(&ll_d2d(de)->lld_it_sem, 1);
146 struct dentry_operations ll_d_ops = {
147 .d_revalidate2 = ll_revalidate2,
148 .d_intent_release = ll_intent_release,
149 .d_release = ll_release,