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/
32 #ifndef _LMV_INTERNAL_H_
33 #define _LMV_INTERNAL_H_
36 #include <lustre_lmv.h>
38 #define LMV_MAX_TGT_COUNT 128
40 #define LL_IT2STR(it) \
41 ((it) ? ldlm_it2str((it)->it_op) : "0")
43 int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
44 struct lookup_intent *it, struct ptlrpc_request **reqp,
45 ldlm_blocking_callback cb_blocking,
46 __u64 extra_lock_flags);
48 int lmv_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
50 int lmv_fld_lookup(struct lmv_obd *lmv, const struct lu_fid *fid, u32 *mds);
51 int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
52 struct lu_fid *fid, struct md_op_data *op_data);
54 int lmv_revalidate_slaves(struct obd_export *exp,
55 const struct lmv_stripe_md *lsm,
56 ldlm_blocking_callback cb_blocking,
57 int extra_lock_flags);
59 int lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
60 struct ptlrpc_request **preq);
61 void lmv_activate_target(struct lmv_obd *lmv, struct lmv_tgt_desc *tgt,
64 int lmv_statfs_check_update(struct obd_device *obd, struct lmv_tgt_desc *tgt);
66 static inline struct obd_device *lmv2obd_dev(struct lmv_obd *lmv)
68 return container_of_safe(lmv, struct obd_device, u.lmv);
71 static inline struct lu_tgt_desc *
72 lmv_tgt(struct lmv_obd *lmv, __u32 index)
74 return index < lmv->lmv_mdt_descs.ltd_tgts_size ?
75 LTD_TGT(&lmv->lmv_mdt_descs, index) : NULL;
79 lmv_mdt0_inited(struct lmv_obd *lmv)
81 return lmv->lmv_mdt_descs.ltd_tgts_size > 0 &&
82 test_bit(0, lmv->lmv_mdt_descs.ltd_tgt_bitmap);
85 #define lmv_foreach_tgt(lmv, tgt) ltd_foreach_tgt(&(lmv)->lmv_mdt_descs, tgt)
87 #define lmv_foreach_tgt_safe(lmv, tgt, tmp) \
88 ltd_foreach_tgt_safe(&(lmv)->lmv_mdt_descs, tgt, tmp)
91 struct lu_tgt_desc *lmv_first_connected_tgt(struct lmv_obd *lmv)
93 struct lu_tgt_desc *tgt;
95 tgt = ltd_first_tgt(&lmv->lmv_mdt_descs);
96 while (tgt && !tgt->ltd_exp)
97 tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
103 struct lu_tgt_desc *lmv_next_connected_tgt(struct lmv_obd *lmv,
104 struct lu_tgt_desc *tgt)
107 tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
108 } while (tgt && !tgt->ltd_exp);
113 #define lmv_foreach_connected_tgt(lmv, tgt) \
114 for (tgt = lmv_first_connected_tgt(lmv); tgt; \
115 tgt = lmv_next_connected_tgt(lmv, tgt))
118 lmv_fid2tgt_index(struct lmv_obd *lmv, const struct lu_fid *fid)
123 if (lmv->lmv_mdt_count < 2)
126 rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
133 static inline struct lmv_tgt_desc *
134 lmv_fid2tgt(struct lmv_obd *lmv, const struct lu_fid *fid)
136 struct lu_tgt_desc *tgt;
139 index = lmv_fid2tgt_index(lmv, fid);
141 return ERR_PTR(index);
143 tgt = lmv_tgt(lmv, index);
145 return tgt ? tgt : ERR_PTR(-ENODEV);
148 static inline int lmv_stripe_md_size(int stripe_count)
150 struct lmv_stripe_md *lsm;
152 return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
155 /* for file under migrating directory, return the target stripe info */
156 static inline const struct lmv_oinfo *
157 lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
158 int namelen, bool new_layout)
162 LASSERT(lmv_dir_striped(lsm));
164 stripe_index = __lmv_name_to_stripe_index(lsm->lsm_md_hash_type,
165 lsm->lsm_md_stripe_count,
166 lsm->lsm_md_migrate_hash,
167 lsm->lsm_md_migrate_offset,
168 name, namelen, new_layout);
169 if (stripe_index < 0)
170 return ERR_PTR(stripe_index);
172 return &lsm->lsm_md_oinfo[stripe_index];
175 static inline bool lmv_dir_retry_check_update(struct md_op_data *op_data)
177 const struct lmv_stripe_md *lsm = op_data->op_mea1;
182 if (lmv_dir_layout_changing(lsm) && !op_data->op_new_layout) {
183 op_data->op_new_layout = true;
187 if (lmv_dir_bad_hash(lsm) &&
188 op_data->op_stripe_index < lsm->lsm_md_stripe_count - 1) {
189 op_data->op_stripe_index++;
196 struct lmv_tgt_desc *lmv_locate_tgt(struct lmv_obd *lmv,
197 struct md_op_data *op_data);
198 int lmv_old_layout_lookup(struct lmv_obd *lmv, struct md_op_data *op_data);
201 int lmv_tunables_init(struct obd_device *obd);