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_idl.h>
32 #include <linux/lustre_dlm.h>
34 extern struct address_space_operations ll_aops;
36 void ll_release(struct dentry *de)
40 OBD_FREE(de->d_fsdata, sizeof(struct ll_dentry_data));
44 extern void d_delete_aliases(struct inode *);
45 void ll_intent_release(struct dentry *de, struct lookup_intent *it)
47 struct lustre_handle *handle;
50 /* XXX the check for RENAME2 is a workaround for old kernels
51 which call intent_release twice in rename
53 if (it == NULL || it->it_op == IT_RENAME2) {
58 LASSERT(ll_d2d(de) != NULL);
60 if (it->it_lock_mode) {
61 handle = (struct lustre_handle *)it->it_lock_handle;
62 if (it->it_op == IT_SETATTR) {
64 ldlm_lock_decref(handle, it->it_lock_mode);
65 rc = ldlm_cli_cancel(handle);
67 CERROR("ldlm_cli_cancel: %d\n", rc);
69 ldlm_lock_decref(handle, it->it_lock_mode);
71 /* intent_release may be called multiple times, and we don't
72 * want to double-decref this lock (see bug 494) */
76 if (!de->d_it || it->it_op == IT_RELEASED_MAGIC) {
82 LL_GET_INTENT(de, it);
87 extern struct dentry *ll_find_alias(struct inode *, struct dentry *);
89 static int revalidate2_finish(int flag, struct ptlrpc_request *request,
91 struct lookup_intent *it,
92 int offset, obd_id ino)
94 ldlm_lock_set_data((struct lustre_handle *)it->it_lock_handle,
95 (*de)->d_inode, sizeof(*((*de)->d_inode)));
96 ptlrpc_req_finished(request);
100 static int ll_have_lock(struct dentry *de)
102 struct ll_sb_info *sbi = ll_s2sbi(de->d_sb);
103 struct lustre_handle lockh;
104 __u64 res_id[RES_NAME_SIZE] = {0};
105 struct obd_device *obddev;
111 obddev = class_conn2obd(&sbi->ll_mdc_conn);
112 res_id[0] = de->d_inode->i_ino;
113 res_id[1] = de->d_inode->i_generation;
115 CDEBUG(D_INFO, "trying to match res "LPU64"\n", res_id[0]);
117 if (ldlm_lock_match(obddev->obd_namespace, res_id, LDLM_PLAIN,
118 NULL, 0, LCK_PR, &lockh)) {
119 ldlm_lock_decref(&lockh, LCK_PR);
123 if (ldlm_lock_match(obddev->obd_namespace, res_id, LDLM_PLAIN,
124 NULL, 0, LCK_PW, &lockh)) {
125 ldlm_lock_decref(&lockh, LCK_PW);
131 int ll_revalidate2(struct dentry *de, int flags, struct lookup_intent *it)
136 /* We don't want to cache negative dentries, so return 0 immediately.
137 * We believe that this is safe, that negative dentries cannot be
138 * pinned by someone else */
139 if (de->d_inode == NULL) {
140 CDEBUG(D_INODE, "negative dentry: ret 0 to force lookup2\n");
144 // if (it == NULL && ll_have_lock(de))
147 rc = ll_intent_lock(de->d_parent->d_inode, &de, it, revalidate2_finish);
149 /* Something bad happened; overwrite it_status? */
150 CERROR("ll_intent_lock: %d\n", rc);
152 /* unfortunately ll_intent_lock may cause a callback and revoke our
154 spin_lock(&dcache_lock);
155 list_del_init(&de->d_hash);
156 spin_unlock(&dcache_lock);
162 int ll_set_dd(struct dentry *de)
169 if (de->d_fsdata != NULL) {
170 CERROR("dentry %p already has d_fsdata set\n", de);
172 OBD_ALLOC(de->d_fsdata, sizeof(struct ll_dentry_data));
173 sema_init(&ll_d2d(de)->lld_it_sem, 1);
181 struct dentry_operations ll_d_ops = {
182 .d_revalidate2 = ll_revalidate2,
183 .d_intent_release = ll_intent_release,
184 .d_release = ll_release,