1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37 #ifndef _LMV_INTERNAL_H_
38 #define _LMV_INTERNAL_H_
39
40 #include "../include/lustre/lustre_idl.h"
41 #include "../include/obd.h"
42
43 #define LMV_MAX_TGT_COUNT 128
44
45 #define lmv_init_lock(lmv) mutex_lock(&lmv->init_mutex)
46 #define lmv_init_unlock(lmv) mutex_unlock(&lmv->init_mutex)
47
48 #define LL_IT2STR(it) \
49 ((it) ? ldlm_it2str((it)->it_op) : "0")
50
51 int lmv_check_connect(struct obd_device *obd);
52
53 int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
54 void *lmm, int lmmsize, struct lookup_intent *it,
55 int flags, struct ptlrpc_request **reqp,
56 ldlm_blocking_callback cb_blocking,
57 __u64 extra_lock_flags);
58
59 int lmv_intent_lookup(struct obd_export *exp, struct md_op_data *op_data,
60 void *lmm, int lmmsize, struct lookup_intent *it,
61 int flags, struct ptlrpc_request **reqp,
62 ldlm_blocking_callback cb_blocking,
63 __u64 extra_lock_flags);
64
65 int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data,
66 void *lmm, int lmmsize, struct lookup_intent *it,
67 int flags, struct ptlrpc_request **reqp,
68 ldlm_blocking_callback cb_blocking,
69 __u64 extra_lock_flags);
70
71 int lmv_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
72 void *, int);
73 int lmv_fld_lookup(struct lmv_obd *lmv, const struct lu_fid *fid, u32 *mds);
74 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds);
75 int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
76 struct md_op_data *op_data);
77
lmv_get_mea(struct ptlrpc_request * req)78 static inline struct lmv_stripe_md *lmv_get_mea(struct ptlrpc_request *req)
79 {
80 struct mdt_body *body;
81 struct lmv_stripe_md *mea;
82
83 LASSERT(req != NULL);
84
85 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
86
87 if (!body || !S_ISDIR(body->mode) || !body->eadatasize)
88 return NULL;
89
90 mea = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD,
91 body->eadatasize);
92 LASSERT(mea != NULL);
93
94 if (mea->mea_count == 0)
95 return NULL;
96 if (mea->mea_magic != MEA_MAGIC_LAST_CHAR &&
97 mea->mea_magic != MEA_MAGIC_ALL_CHARS &&
98 mea->mea_magic != MEA_MAGIC_HASH_SEGMENT)
99 return NULL;
100
101 return mea;
102 }
103
lmv_get_easize(struct lmv_obd * lmv)104 static inline int lmv_get_easize(struct lmv_obd *lmv)
105 {
106 return sizeof(struct lmv_stripe_md) +
107 lmv->desc.ld_tgt_count *
108 sizeof(struct lu_fid);
109 }
110
111 static inline struct lmv_tgt_desc *
lmv_get_target(struct lmv_obd * lmv,u32 mds)112 lmv_get_target(struct lmv_obd *lmv, u32 mds)
113 {
114 int count = lmv->desc.ld_tgt_count;
115 int i;
116
117 for (i = 0; i < count; i++) {
118 if (lmv->tgts[i] == NULL)
119 continue;
120
121 if (lmv->tgts[i]->ltd_idx == mds)
122 return lmv->tgts[i];
123 }
124
125 return ERR_PTR(-ENODEV);
126 }
127
128 static inline struct lmv_tgt_desc *
lmv_find_target(struct lmv_obd * lmv,const struct lu_fid * fid)129 lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
130 {
131 u32 mds = 0;
132 int rc;
133
134 if (lmv->desc.ld_tgt_count > 1) {
135 rc = lmv_fld_lookup(lmv, fid, &mds);
136 if (rc)
137 return ERR_PTR(rc);
138 }
139
140 return lmv_get_target(lmv, mds);
141 }
142
143 struct lmv_tgt_desc
144 *lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
145 struct lu_fid *fid);
146 /* lproc_lmv.c */
147 void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars);
148
149 extern struct file_operations lmv_proc_target_fops;
150
151 #endif
152