1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * Copyright (c) 2012 Whamcloud, Inc.
36 * This file is part of Lustre, http://www.lustre.org/
37 * Lustre is a trademark of Sun Microsystems, Inc.
39 * lustre/include/lustre_mdc.h
41 * MDS data structures.
42 * See also lustre_idl.h for wire formats of requests.
54 # include <linux/fs.h>
55 # include <linux/dcache.h>
56 # ifdef CONFIG_FS_POSIX_ACL
57 # include <linux/posix_acl_xattr.h>
58 # endif /* CONFIG_FS_POSIX_ACL */
59 # include <linux/lustre_intent.h>
60 #endif /* __KERNEL__ */
61 #include <lustre_handles.h>
62 #include <libcfs/libcfs.h>
63 #include <lustre/lustre_idl.h>
64 #include <lustre_lib.h>
65 #include <lustre_dlm.h>
66 #include <lustre_log.h>
67 #include <lustre_export.h>
71 struct ptlrpc_request;
75 cfs_semaphore_t rpcl_sem;
76 struct lookup_intent *rpcl_it;
79 static inline void mdc_init_rpc_lock(struct mdc_rpc_lock *lck)
81 cfs_sema_init(&lck->rpcl_sem, 1);
85 static inline void mdc_get_rpc_lock(struct mdc_rpc_lock *lck,
86 struct lookup_intent *it)
89 if (!it || (it->it_op != IT_GETATTR && it->it_op != IT_LOOKUP)) {
90 cfs_down(&lck->rpcl_sem);
91 LASSERT(lck->rpcl_it == NULL);
96 static inline void mdc_put_rpc_lock(struct mdc_rpc_lock *lck,
97 struct lookup_intent *it)
99 if (!it || (it->it_op != IT_GETATTR && it->it_op != IT_LOOKUP)) {
100 LASSERT(it == lck->rpcl_it);
102 cfs_up(&lck->rpcl_sem);
107 static inline void mdc_update_max_ea_from_body(struct obd_export *exp,
108 struct mdt_body *body)
110 if (body->valid & OBD_MD_FLMODEASIZE) {
111 if (exp->exp_obd->u.cli.cl_max_mds_easize < body->max_mdsize)
112 exp->exp_obd->u.cli.cl_max_mds_easize =
114 if (exp->exp_obd->u.cli.cl_max_mds_cookiesize <
115 body->max_cookiesize)
116 exp->exp_obd->u.cli.cl_max_mds_cookiesize =
117 body->max_cookiesize;
122 struct mdc_cache_waiter {
123 cfs_list_t mcw_entry;
124 cfs_waitq_t mcw_waitq;
127 /* mdc/mdc_locks.c */
128 int it_disposition(struct lookup_intent *it, int flag);
129 void it_clear_disposition(struct lookup_intent *it, int flag);
130 void it_set_disposition(struct lookup_intent *it, int flag);
131 int it_open_error(int phase, struct lookup_intent *it);
132 #ifdef HAVE_SPLIT_SUPPORT
133 int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
134 const struct page *page, int offset);