+ if (inode == NULL) {
+ CERROR("unexpected NULL inode, tell phil\n");
+ return;
+ }
+
+ CDEBUG(D_INODE, "marking dentries for ino %lu/%u(%p) invalid\n",
+ inode->i_ino, inode->i_generation, inode);
+
+ sbi = ll_i2sbi(inode);
+ head = &inode->i_dentry;
+restart:
+ spin_lock(&dcache_lock);
+ tmp = head;
+ while ((tmp = tmp->next) != head) {
+ struct dentry *dentry = list_entry(tmp, struct dentry, d_alias);
+ if (atomic_read(&dentry->d_count) == 0) {
+ CDEBUG(D_DENTRY, "deleting dentry %*s (%p) parent %p "
+ "inode %p\n", dentry->d_name.len,
+ dentry->d_name.name, dentry, dentry->d_parent,
+ dentry->d_inode);
+ dget_locked(dentry);
+ __d_drop(dentry);
+ spin_unlock(&dcache_lock);
+ dput(dentry);
+ goto restart;
+ } else if (!(dentry->d_flags & DCACHE_LUSTRE_INVALID)) {
+ CDEBUG(D_DENTRY, "unhashing dentry %*s (%p) parent %p "
+ "inode %p refc %d\n", dentry->d_name.len,
+ dentry->d_name.name, dentry, dentry->d_parent,
+ dentry->d_inode, atomic_read(&dentry->d_count));
+ hlist_del_init(&dentry->d_hash);
+ dentry->d_flags |= DCACHE_LUSTRE_INVALID;
+ hlist_add_head(&dentry->d_hash,
+ &sbi->ll_orphan_dentry_list);
+ }
+ }
+ spin_unlock(&dcache_lock);
+ EXIT;
+}
+
+extern struct dentry *ll_find_alias(struct inode *, struct dentry *);
+
+static int revalidate_it_finish(struct ptlrpc_request *request,
+ int offset, struct lookup_intent *it,
+ struct dentry *de)
+{
+ struct ll_sb_info *sbi;
+ int rc = 0;
+ ENTRY;
+
+ if (!request)
+ RETURN(0);
+
+ if (it_disposition(it, DISP_LOOKUP_NEG))
+ RETURN(-ENOENT);
+
+ sbi = ll_i2sbi(de->d_inode);
+ rc = ll_prep_inode(sbi->ll_osc_exp, sbi->ll_mdc_exp,
+ &de->d_inode, request, offset, NULL);
+
+ RETURN(rc);
+}
+
+void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry)
+{
+ LASSERT(it != NULL);
+ LASSERT(dentry != NULL);
+
+ if (it->d.lustre.it_lock_mode && dentry->d_inode != NULL) {
+ struct inode *inode = dentry->d_inode;
+ CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
+ inode, inode->i_ino, inode->i_generation);
+ mdc_set_lock_data(NULL, &it->d.lustre.it_lock_handle, inode);
+ }
+
+ /* drop lookup or getattr locks immediately */
+ if (it->it_op == IT_LOOKUP || it->it_op == IT_GETATTR) {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ /* on 2.6 there are situation when several lookups and
+ * revalidations may be requested during single operation.
+ * therefore, we don't release intent here -bzzz */
+ ll_intent_drop_lock(it);
+#else
+ ll_intent_release(it);
+#endif
+ }
+}
+
+void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft)
+{
+ struct lookup_intent *it = *itp;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ if (it && it->it_magic != INTENT_MAGIC) {
+ CERROR("WARNING: uninitialized intent\n");
+ LBUG();
+ }
+ if (it && (it->it_op == IT_GETATTR || it->it_op == 0))
+ it->it_op = IT_LOOKUP;
+#endif
+
+ if (!it || it->it_op == IT_GETXATTR)
+ it = *itp = deft;
+
+ it->it_op_release = ll_intent_release;
+}
+
+int ll_revalidate_it(struct dentry *de, int flags, struct lookup_intent *it)
+{
+ int rc;
+ struct ll_fid pfid, cfid;
+ struct it_cb_data icbd;
+ struct ll_uctxt ctxt;
+ struct ptlrpc_request *req = NULL;
+ struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
+ struct obd_export *exp;
+
+ ENTRY;
+ CDEBUG(D_VFSTRACE, "VFS Op:name=%s,intent=%s\n", de->d_name.name,
+ LL_IT2STR(it));
+
+ /* Cached negative dentries are unsafe for now - look them up again */
+ if (de->d_inode == NULL)
+ RETURN(0);
+
+ CDEBUG(D_INODE, "revalidate 0x%p: %*s -> %lu/%lu\n",
+ de, de->d_name.len, de->d_name.name,
+ (unsigned long) de->d_inode->i_ino,
+ (unsigned long) de->d_inode->i_generation);
+
+ exp = ll_i2mdcexp(de->d_inode);
+ ll_inode2fid(&pfid, de->d_parent->d_inode);
+ ll_inode2fid(&cfid, de->d_inode);
+ icbd.icbd_parent = de->d_parent->d_inode;
+ icbd.icbd_childp = &de;
+
+ /* Never execute intents for mount points.
+ * Attributes will be fixed up in ll_inode_revalidate_it */
+ if (d_mountpoint(de))
+ RETURN(1);
+
+ ll_frob_intent(&it, &lookup_it);
+ LASSERT(it);
+
+ ll_i2uctxt(&ctxt, de->d_parent->d_inode, de->d_inode);
+
+ if (it->it_op == IT_GETATTR) { /* We need to check for LOOKUP lock
+ as well */
+ rc = md_intent_lock(exp, &ctxt, &pfid, de->d_name.name,
+ de->d_name.len, NULL, 0, &cfid, &lookup_it,
+ flags, &req, ll_mdc_blocking_ast);
+ /* If there was no lookup lock, no point in even checking for
+ UPDATE lock */
+ if (!rc) {
+ it = &lookup_it;
+ GOTO(out, rc);
+ }
+ if (it_disposition(&lookup_it, DISP_LOOKUP_NEG)) {
+ ll_intent_release(&lookup_it);
+ it = &lookup_it;
+ GOTO(out, rc = 0);
+ }
+
+ if (req)
+ ptlrpc_req_finished(req);
+ req = NULL;
+ ll_lookup_finish_locks(&lookup_it, de);
+ }
+
+ rc = md_intent_lock(exp, &ctxt, &pfid, de->d_name.name, de->d_name.len,
+ NULL, 0, &cfid, it, flags, &req,
+ ll_mdc_blocking_ast);
+ /* If req is NULL, then mdc_intent_lock only tried to do a lock match;
+ * if all was well, it will return 1 if it found locks, 0 otherwise. */
+ if (req == NULL && rc >= 0)
+ GOTO(out, rc);
+
+ if (rc < 0) {
+ if (rc != -ESTALE) {
+ CDEBUG(D_INFO, "ll_intent_lock: rc %d : it->it_status "
+ "%d\n", rc, it->d.lustre.it_status);
+ }
+ GOTO(out, rc = 0);
+ }
+
+ rc = revalidate_it_finish(req, 1, it, de);
+ if (rc != 0) {
+ ll_intent_release(it);
+ GOTO(out, rc = 0);
+ }
+ rc = 1;
+
+ /* unfortunately ll_intent_lock may cause a callback and revoke our
+ dentry */
+ spin_lock(&dcache_lock);
+ hlist_del_init(&de->d_hash);
+ __d_rehash(de, 0);
+ spin_unlock(&dcache_lock);
+
+ out:
+ if (req != NULL && rc == 1)
+ ptlrpc_req_finished(req);
+ if (rc == 0) {
+ ll_unhash_aliases(de->d_inode);
+ /* done in ll_unhash_aliases()
+ de->d_flags |= DCACHE_LUSTRE_INVALID; */
+ } else {
+ CDEBUG(D_DENTRY, "revalidated dentry %*s (%p) parent %p "
+ "inode %p refc %d\n", de->d_name.len,
+ de->d_name.name, de, de->d_parent, de->d_inode,
+ atomic_read(&de->d_count));
+ ll_lookup_finish_locks(it, de);
+ de->d_flags &= ~DCACHE_LUSTRE_INVALID;
+ }
+ RETURN(rc);
+}
+
+/*static*/ void ll_pin(struct dentry *de, struct vfsmount *mnt, int flag)
+{
+ struct inode *inode= de->d_inode;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct ll_dentry_data *ldd = ll_d2d(de);
+ struct obd_client_handle *handle;
+ int rc = 0;
+ ENTRY;
+ LASSERT(ldd);
+
+ lock_kernel();
+ /* Strictly speaking this introduces an additional race: the
+ * increments should wait until the rpc has returned.
+ * However, given that at present the function is void, this
+ * issue is moot. */
+ if (flag == 1 && (++ldd->lld_mnt_count) > 1) {
+ unlock_kernel();