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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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23 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
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26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
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33 #ifndef _LMV_INTERNAL_H_
34 #define _LMV_INTERNAL_H_
36 #include <lustre/lustre_idl.h>
38 #include <lustre_lmv.h>
40 #define LMV_MAX_TGT_COUNT 128
42 #define LL_IT2STR(it) \
43 ((it) ? ldlm_it2str((it)->it_op) : "0")
45 int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
46 struct lookup_intent *it, struct ptlrpc_request **reqp,
47 ldlm_blocking_callback cb_blocking,
48 __u64 extra_lock_flags);
50 int lmv_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
52 int lmv_fld_lookup(struct lmv_obd *lmv, const struct lu_fid *fid, u32 *mds);
53 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds);
54 int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
55 struct lu_fid *fid, struct md_op_data *op_data);
57 int lmv_revalidate_slaves(struct obd_export *exp,
58 const struct lmv_stripe_md *lsm,
59 ldlm_blocking_callback cb_blocking,
60 int extra_lock_flags);
62 static inline struct obd_device *lmv2obd_dev(struct lmv_obd *lmv)
64 return container_of0(lmv, struct obd_device, u.lmv);
67 static inline struct lmv_tgt_desc *
68 lmv_get_target(struct lmv_obd *lmv, u32 mdt_idx, int *index)
72 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
73 if (lmv->tgts[i] == NULL)
76 if (lmv->tgts[i]->ltd_idx == mdt_idx) {
83 return ERR_PTR(-ENODEV);
87 lmv_find_target_index(struct lmv_obd *lmv, const struct lu_fid *fid)
89 struct lmv_tgt_desc *ltd;
93 if (lmv->desc.ld_tgt_count > 1) {
95 rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
100 ltd = lmv_get_target(lmv, mdt_idx, &index);
107 static inline struct lmv_tgt_desc *
108 lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
112 index = lmv_find_target_index(lmv, fid);
114 return ERR_PTR(index);
116 return lmv->tgts[index];
119 static inline int lmv_stripe_md_size(int stripe_count)
121 struct lmv_stripe_md *lsm;
123 return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
126 static inline const struct lmv_oinfo *
127 lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
132 stripe_index = lmv_name_to_stripe_index(lsm->lsm_md_hash_type,
133 lsm->lsm_md_stripe_count,
135 if (stripe_index < 0)
136 return ERR_PTR(stripe_index);
138 LASSERTF(stripe_index < lsm->lsm_md_stripe_count,
139 "stripe_index = %d, stripe_count = %d hash_type = %x"
140 "name = %.*s\n", stripe_index, lsm->lsm_md_stripe_count,
141 lsm->lsm_md_hash_type, namelen, name);
143 return &lsm->lsm_md_oinfo[stripe_index];
146 static inline bool lmv_need_try_all_stripes(const struct lmv_stripe_md *lsm)
148 return !lmv_is_known_hash_type(lsm->lsm_md_hash_type) ||
149 lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION;
153 *lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
156 #ifdef CONFIG_PROC_FS
157 extern struct lprocfs_vars lprocfs_lmv_obd_vars[];
159 extern struct file_operations lmv_proc_target_fops;