4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #ifndef _LMV_INTERNAL_H_
34 #define _LMV_INTERNAL_H_
37 #include <lustre_lmv.h>
39 #define LMV_MAX_TGT_COUNT 128
41 #define LL_IT2STR(it) \
42 ((it) ? ldlm_it2str((it)->it_op) : "0")
44 int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
45 struct lookup_intent *it, struct ptlrpc_request **reqp,
46 ldlm_blocking_callback cb_blocking,
47 __u64 extra_lock_flags);
49 int lmv_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
51 int lmv_fld_lookup(struct lmv_obd *lmv, const struct lu_fid *fid, u32 *mds);
52 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds);
53 int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
54 struct lu_fid *fid, struct md_op_data *op_data);
56 int lmv_revalidate_slaves(struct obd_export *exp,
57 const struct lmv_stripe_md *lsm,
58 ldlm_blocking_callback cb_blocking,
59 int extra_lock_flags);
61 int lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
62 struct ptlrpc_request **preq);
64 static inline struct obd_device *lmv2obd_dev(struct lmv_obd *lmv)
66 return container_of0(lmv, struct obd_device, u.lmv);
69 static inline struct lmv_tgt_desc *
70 lmv_get_target(struct lmv_obd *lmv, u32 mdt_idx, int *index)
74 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
75 if (lmv->tgts[i] == NULL)
78 if (lmv->tgts[i]->ltd_idx == mdt_idx) {
85 return ERR_PTR(-ENODEV);
89 lmv_find_target_index(struct lmv_obd *lmv, const struct lu_fid *fid)
91 struct lmv_tgt_desc *ltd;
95 if (lmv->desc.ld_tgt_count > 1) {
97 rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
102 ltd = lmv_get_target(lmv, mdt_idx, &index);
109 static inline struct lmv_tgt_desc *
110 lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
114 index = lmv_find_target_index(lmv, fid);
116 return ERR_PTR(index);
118 return lmv->tgts[index];
121 static inline int lmv_stripe_md_size(int stripe_count)
123 struct lmv_stripe_md *lsm;
125 return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
128 /* for file under migrating directory, return the target stripe info */
129 static inline const struct lmv_oinfo *
130 lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
131 int namelen, bool post_migrate)
133 __u32 hash_type = lsm->lsm_md_hash_type;
134 __u32 stripe_count = lsm->lsm_md_stripe_count;
137 if (hash_type & LMV_HASH_FLAG_MIGRATION) {
139 hash_type &= ~LMV_HASH_FLAG_MIGRATION;
140 stripe_count = lsm->lsm_md_migrate_offset;
142 hash_type = lsm->lsm_md_migrate_hash;
143 stripe_count -= lsm->lsm_md_migrate_offset;
147 stripe_index = lmv_name_to_stripe_index(hash_type, stripe_count,
149 if (stripe_index < 0)
150 return ERR_PTR(stripe_index);
152 if ((lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION) && !post_migrate)
153 stripe_index += lsm->lsm_md_migrate_offset;
155 if (stripe_index >= lsm->lsm_md_stripe_count) {
156 CERROR("stripe_index %d stripe_count %d hash_type %#x "
157 "migrate_offset %d migrate_hash %#x name %.*s\n",
158 stripe_index, lsm->lsm_md_stripe_count,
159 lsm->lsm_md_hash_type, lsm->lsm_md_migrate_offset,
160 lsm->lsm_md_migrate_hash, namelen, name);
161 return ERR_PTR(-EBADF);
164 return &lsm->lsm_md_oinfo[stripe_index];
167 static inline bool lmv_is_dir_migrating(const struct lmv_stripe_md *lsm)
169 return lsm ? lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION : false;
172 static inline bool lmv_is_dir_bad_hash(const struct lmv_stripe_md *lsm)
177 if (lmv_is_dir_migrating(lsm)) {
178 if (lsm->lsm_md_stripe_count - lsm->lsm_md_migrate_offset > 1)
179 return !lmv_is_known_hash_type(
180 lsm->lsm_md_migrate_hash);
184 return !lmv_is_known_hash_type(lsm->lsm_md_hash_type);
187 static inline bool lmv_dir_retry_check_update(struct md_op_data *op_data)
189 const struct lmv_stripe_md *lsm = op_data->op_mea1;
194 if (lmv_is_dir_migrating(lsm) && !op_data->op_post_migrate) {
195 op_data->op_post_migrate = true;
199 if (lmv_is_dir_bad_hash(lsm) &&
200 op_data->op_stripe_index < lsm->lsm_md_stripe_count - 1) {
201 op_data->op_stripe_index++;
208 struct lmv_tgt_desc *lmv_locate_tgt(struct lmv_obd *lmv,
209 struct md_op_data *op_data,
212 int lmv_tunables_init(struct obd_device *obd);