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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_
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 static inline struct obd_device *lmv2obd_dev(struct lmv_obd *lmv)
63 return container_of0(lmv, struct obd_device, u.lmv);
66 static inline struct lmv_tgt_desc *
67 lmv_get_target(struct lmv_obd *lmv, u32 mdt_idx, int *index)
71 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
72 if (lmv->tgts[i] == NULL)
75 if (lmv->tgts[i]->ltd_idx == mdt_idx) {
82 return ERR_PTR(-ENODEV);
86 lmv_find_target_index(struct lmv_obd *lmv, const struct lu_fid *fid)
88 struct lmv_tgt_desc *ltd;
92 if (lmv->desc.ld_tgt_count > 1) {
94 rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
99 ltd = lmv_get_target(lmv, mdt_idx, &index);
106 static inline struct lmv_tgt_desc *
107 lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
111 index = lmv_find_target_index(lmv, fid);
113 return ERR_PTR(index);
115 return lmv->tgts[index];
118 static inline int lmv_stripe_md_size(int stripe_count)
120 struct lmv_stripe_md *lsm;
122 return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
125 /* for file under migrating directory, return the target stripe info */
126 static inline const struct lmv_oinfo *
127 lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
130 __u32 hash_type = lsm->lsm_md_hash_type;
131 __u32 stripe_count = lsm->lsm_md_stripe_count;
134 if (hash_type & LMV_HASH_FLAG_MIGRATION) {
135 hash_type &= ~LMV_HASH_FLAG_MIGRATION;
136 stripe_count = lsm->lsm_md_migrate_offset;
139 stripe_index = lmv_name_to_stripe_index(hash_type, stripe_count,
141 if (stripe_index < 0)
142 return ERR_PTR(stripe_index);
144 LASSERTF(stripe_index < lsm->lsm_md_stripe_count,
145 "stripe_index = %d, stripe_count = %d hash_type = %x"
146 "name = %.*s\n", stripe_index, lsm->lsm_md_stripe_count,
147 lsm->lsm_md_hash_type, namelen, name);
149 return &lsm->lsm_md_oinfo[stripe_index];
152 static inline bool lmv_need_try_all_stripes(const struct lmv_stripe_md *lsm)
154 return !lmv_is_known_hash_type(lsm->lsm_md_hash_type) ||
155 lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION;
159 *lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
162 int lmv_tunables_init(struct obd_device *obd);