1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2001-2003 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 /* should NOT be called with the dcache lock, see fs/dcache.c */
35 void ll_release(struct dentry *de)
38 OBD_FREE(de->d_fsdata, sizeof(struct ll_dentry_data));
42 int ll_delete(struct dentry *de)
45 CERROR("%s put dentry %p+%p with d_it %p\n", current->comm,
46 de, de->d_fsdata, de->d_it);
52 void ll_set_dd(struct dentry *de)
59 if (de->d_fsdata == NULL) {
60 OBD_ALLOC(de->d_fsdata, sizeof(struct ll_dentry_data));
61 sema_init(&ll_d2d(de)->lld_it_sem, 1);
69 void ll_intent_release(struct dentry *de, struct lookup_intent *it)
71 struct lustre_handle *handle;
74 if (it->it_lock_mode) {
75 handle = (struct lustre_handle *)it->it_lock_handle;
76 ldlm_lock_decref(handle, it->it_lock_mode);
78 /* intent_release may be called multiple times, from
79 this thread and we don't want to double-decref this
84 if (!de->d_it || it->it_op == IT_RELEASED_MAGIC) {
90 LL_GET_INTENT(de, it);
92 CDEBUG(D_INODE, "STRANGE intent release: %p %p\n",
98 extern struct dentry *ll_find_alias(struct inode *, struct dentry *);
100 static int revalidate2_finish(int flag, struct ptlrpc_request *request,
101 struct inode *parent, struct dentry **de,
102 struct lookup_intent *it, int offset, obd_id ino)
104 struct ll_sb_info *sbi = ll_i2sbi(parent);
105 struct mds_body *body;
106 struct lov_stripe_md *lsm = NULL;
107 struct lov_mds_md *lmm;
112 /* NB 1 request reference will be taken away by ll_intent_lock()
115 if ((flag & LL_LOOKUP_NEGATIVE) != 0)
116 GOTO (out, rc = -ENOENT);
118 /* We only get called if the mdc_enqueue() called from
119 * ll_intent_lock() was successful. Therefore the mds_body is
120 * present and correct, and the eadata is present (but still
121 * opaque, so only obd_unpackmd() can check the size) */
122 body = lustre_msg_buf(request->rq_repmsg, offset, sizeof (*body));
123 LASSERT (body != NULL);
124 LASSERT_REPSWABBED (request, offset);
126 if (body->valid & OBD_MD_FLEASIZE) {
127 /* Only bother with this if inodes's LSM not set? */
129 if (body->eadatasize == 0) {
130 CERROR ("OBD_MD_FLEASIZE set, but eadatasize 0\n");
131 GOTO (out, rc = -EPROTO);
133 lmmsize = body->eadatasize;
134 lmm = lustre_msg_buf (request->rq_repmsg, offset + 1, lmmsize);
135 LASSERT (lmm != NULL);
136 LASSERT_REPSWABBED (request, offset + 1);
138 rc = obd_unpackmd (&sbi->ll_osc_conn,
141 CERROR ("Error %d unpacking eadata\n", rc);
143 /* XXX don't know if I should do this... */
145 /* or skip the ll_update_inode but still do
146 * mdc_lock_set_inode() */
148 LASSERT (rc >= sizeof (*lsm));
152 ll_update_inode((*de)->d_inode, body, lsm);
155 ll_i2info((*de)->d_inode)->lli_smd != lsm)
156 obd_free_memmd (&sbi->ll_osc_conn, &lsm);
158 ll_mdc_lock_set_inode((struct lustre_handle *)it->it_lock_handle,
164 int ll_have_md_lock(struct dentry *de)
166 struct ll_sb_info *sbi = ll_s2sbi(de->d_sb);
167 struct lustre_handle lockh;
168 struct ldlm_res_id res_id = { .name = {0} };
169 struct obd_device *obddev;
175 obddev = class_conn2obd(&sbi->ll_mdc_conn);
176 res_id.name[0] = de->d_inode->i_ino;
177 res_id.name[1] = de->d_inode->i_generation;
179 CDEBUG(D_INFO, "trying to match res "LPU64"\n", res_id.name[0]);
181 if (ldlm_lock_match(obddev->obd_namespace, LDLM_FL_BLOCK_GRANTED,
182 &res_id, LDLM_PLAIN, NULL, 0, LCK_PR, &lockh)) {
183 ldlm_lock_decref(&lockh, LCK_PR);
187 if (ldlm_lock_match(obddev->obd_namespace, LDLM_FL_BLOCK_GRANTED,
188 &res_id, LDLM_PLAIN, NULL, 0, LCK_PW, &lockh)) {
189 ldlm_lock_decref(&lockh, LCK_PW);
195 int ll_revalidate2(struct dentry *de, int flags, struct lookup_intent *it)
199 CDEBUG(D_VFSTRACE, "VFS Op:name=%s,intent=%s\n", de->d_name.name,
202 /* We don't want to cache negative dentries, so return 0 immediately.
203 * We believe that this is safe, that negative dentries cannot be
204 * pinned by someone else */
205 if (de->d_inode == NULL) {
206 CDEBUG(D_INODE, "negative dentry: ret 0 to force lookup2\n");
210 if (it == NULL || it->it_op == IT_GETATTR) {
211 /* We could just return 1 immediately, but since we should only
212 * be called in revalidate2 if we already have a lock, let's
214 struct inode *inode = de->d_inode;
215 struct ll_sb_info *sbi = ll_i2sbi(inode);
216 struct obd_device *obddev = class_conn2obd(&sbi->ll_mdc_conn);
217 struct ldlm_res_id res_id =
218 { .name = {inode->i_ino, (__u64)inode->i_generation} };
219 struct lustre_handle lockh;
220 rc = ldlm_lock_match(obddev->obd_namespace,
221 LDLM_FL_BLOCK_GRANTED, &res_id,
222 LDLM_PLAIN, NULL, 0, LCK_PR, &lockh);
224 de->d_flags &= ~DCACHE_LUSTRE_INVALID;
225 if (it && it->it_op == IT_GETATTR) {
226 memcpy(it->it_lock_handle, &lockh,
228 it->it_lock_mode = LCK_PR;
229 LL_SAVE_INTENT(de, it);
231 ldlm_lock_decref(&lockh, LCK_PR);
235 rc = ldlm_lock_match(obddev->obd_namespace,
236 LDLM_FL_BLOCK_GRANTED, &res_id,
237 LDLM_PLAIN, NULL, 0, LCK_PW, &lockh);
239 de->d_flags &= ~DCACHE_LUSTRE_INVALID;
240 if (it && it->it_op == IT_GETATTR) {
241 memcpy(it->it_lock_handle, &lockh,
243 it->it_lock_mode = LCK_PW;
244 LL_SAVE_INTENT(de, it);
246 ldlm_lock_decref(&lockh, LCK_PW);
250 if (S_ISDIR(de->d_inode->i_mode))
251 ll_invalidate_inode_pages(de->d_inode);
252 d_unhash_aliases(de->d_inode);
256 rc = ll_intent_lock(de->d_parent->d_inode, &de, it, revalidate2_finish);
258 CERROR("ll_intent_lock: rc %d : it->it_status %d\n", rc,
262 /* unfortunately ll_intent_lock may cause a callback and revoke our
264 spin_lock(&dcache_lock);
265 list_del_init(&de->d_hash);
266 spin_unlock(&dcache_lock);
272 struct dentry_operations ll_d_ops = {
273 .d_revalidate2 = ll_revalidate2,
274 .d_intent_release = ll_intent_release,
275 .d_release = ll_release,
276 .d_delete = ll_delete,