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(const struct lu_env *env, struct obd_export *exp,
53 struct lu_fid *fid, struct md_op_data *op_data);
55 int lmv_revalidate_slaves(struct obd_export *exp,
56 const struct lmv_stripe_md *lsm,
57 ldlm_blocking_callback cb_blocking,
58 int extra_lock_flags);
60 int lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
61 struct ptlrpc_request **preq);
62 void lmv_activate_target(struct lmv_obd *lmv, struct lmv_tgt_desc *tgt,
65 int lmv_statfs_check_update(struct obd_device *obd, struct lmv_tgt_desc *tgt);
67 static inline struct obd_device *lmv2obd_dev(struct lmv_obd *lmv)
69 return container_of0(lmv, struct obd_device, u.lmv);
72 static inline struct lu_tgt_desc *
73 lmv_tgt(struct lmv_obd *lmv, __u32 index)
75 return index < lmv->lmv_mdt_descs.ltd_tgt_bitmap->size ?
76 LTD_TGT(&lmv->lmv_mdt_descs, index) : NULL;
80 lmv_mdt0_inited(struct lmv_obd *lmv)
82 return lmv->lmv_mdt_descs.ltd_tgt_bitmap->size > 0 &&
83 cfs_bitmap_check(lmv->lmv_mdt_descs.ltd_tgt_bitmap, 0);
86 #define lmv_foreach_tgt(lmv, tgt) ltd_foreach_tgt(&(lmv)->lmv_mdt_descs, tgt)
88 #define lmv_foreach_tgt_safe(lmv, tgt, tmp) \
89 ltd_foreach_tgt_safe(&(lmv)->lmv_mdt_descs, tgt, tmp)
92 struct lu_tgt_desc *lmv_first_connected_tgt(struct lmv_obd *lmv)
94 struct lu_tgt_desc *tgt;
96 tgt = ltd_first_tgt(&lmv->lmv_mdt_descs);
97 while (tgt && !tgt->ltd_exp)
98 tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
104 struct lu_tgt_desc *lmv_next_connected_tgt(struct lmv_obd *lmv,
105 struct lu_tgt_desc *tgt)
108 tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
109 } while (tgt && !tgt->ltd_exp);
114 #define lmv_foreach_connected_tgt(lmv, tgt) \
115 for (tgt = lmv_first_connected_tgt(lmv); tgt; \
116 tgt = lmv_next_connected_tgt(lmv, tgt))
119 lmv_fid2tgt_index(struct lmv_obd *lmv, const struct lu_fid *fid)
124 if (lmv->lmv_mdt_count < 2)
127 rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
134 static inline struct lmv_tgt_desc *
135 lmv_fid2tgt(struct lmv_obd *lmv, const struct lu_fid *fid)
137 struct lu_tgt_desc *tgt;
140 index = lmv_fid2tgt_index(lmv, fid);
142 return ERR_PTR(index);
144 tgt = lmv_tgt(lmv, index);
146 return tgt ? tgt : ERR_PTR(-ENODEV);
149 static inline int lmv_stripe_md_size(int stripe_count)
151 struct lmv_stripe_md *lsm;
153 return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
156 /* for file under migrating directory, return the target stripe info */
157 static inline const struct lmv_oinfo *
158 lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
159 int namelen, bool post_migrate)
161 __u32 hash_type = lsm->lsm_md_hash_type;
162 __u32 stripe_count = lsm->lsm_md_stripe_count;
165 LASSERT(lmv_dir_striped(lsm));
167 if (hash_type & LMV_HASH_FLAG_MIGRATION) {
169 hash_type &= ~LMV_HASH_FLAG_MIGRATION;
170 stripe_count = lsm->lsm_md_migrate_offset;
172 hash_type = lsm->lsm_md_migrate_hash;
173 stripe_count -= lsm->lsm_md_migrate_offset;
177 stripe_index = lmv_name_to_stripe_index(hash_type, stripe_count,
179 if (stripe_index < 0)
180 return ERR_PTR(stripe_index);
182 if ((lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION) && !post_migrate)
183 stripe_index += lsm->lsm_md_migrate_offset;
185 if (stripe_index >= lsm->lsm_md_stripe_count) {
186 CERROR("stripe_index %d stripe_count %d hash_type %#x "
187 "migrate_offset %d migrate_hash %#x name %.*s\n",
188 stripe_index, lsm->lsm_md_stripe_count,
189 lsm->lsm_md_hash_type, lsm->lsm_md_migrate_offset,
190 lsm->lsm_md_migrate_hash, namelen, name);
191 return ERR_PTR(-EBADF);
194 return &lsm->lsm_md_oinfo[stripe_index];
197 static inline bool lmv_dir_retry_check_update(struct md_op_data *op_data)
199 const struct lmv_stripe_md *lsm = op_data->op_mea1;
204 if (lmv_dir_migrating(lsm) && !op_data->op_post_migrate) {
205 op_data->op_post_migrate = true;
209 if (lmv_dir_bad_hash(lsm) &&
210 op_data->op_stripe_index < lsm->lsm_md_stripe_count - 1) {
211 op_data->op_stripe_index++;
218 struct lmv_tgt_desc *lmv_locate_tgt(struct lmv_obd *lmv,
219 struct md_op_data *op_data);
220 int lmv_migrate_existence_check(struct lmv_obd *lmv,
221 struct md_op_data *op_data);
224 int lmv_tunables_init(struct obd_device *obd);