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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 lu_fid *pfid,
58 const struct lmv_stripe_md *lsm,
59 ldlm_blocking_callback cb_blocking,
60 int extra_lock_flags);
62 int lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
63 struct ptlrpc_request **preq);
65 static inline struct obd_device *lmv2obd_dev(struct lmv_obd *lmv)
67 return container_of0(lmv, struct obd_device, u.lmv);
70 static inline struct lmv_tgt_desc *
71 lmv_get_target(struct lmv_obd *lmv, u32 mdt_idx, int *index)
75 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
76 if (lmv->tgts[i] == NULL)
79 if (lmv->tgts[i]->ltd_idx == mdt_idx) {
86 return ERR_PTR(-ENODEV);
90 lmv_find_target_index(struct lmv_obd *lmv, const struct lu_fid *fid)
92 struct lmv_tgt_desc *ltd;
96 if (lmv->desc.ld_tgt_count > 1) {
98 rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
103 ltd = lmv_get_target(lmv, mdt_idx, &index);
110 static inline struct lmv_tgt_desc *
111 lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
115 index = lmv_find_target_index(lmv, fid);
117 return ERR_PTR(index);
119 return lmv->tgts[index];
122 static inline int lmv_stripe_md_size(int stripe_count)
124 struct lmv_stripe_md *lsm;
126 return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
129 /* for file under migrating directory, return the target stripe info */
130 static inline const struct lmv_oinfo *
131 lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
132 int namelen, bool post_migrate)
134 __u32 hash_type = lsm->lsm_md_hash_type;
135 __u32 stripe_count = lsm->lsm_md_stripe_count;
138 if (hash_type & LMV_HASH_FLAG_MIGRATION) {
140 hash_type &= ~LMV_HASH_FLAG_MIGRATION;
141 stripe_count = lsm->lsm_md_migrate_offset;
143 hash_type = lsm->lsm_md_migrate_hash;
144 stripe_count -= lsm->lsm_md_migrate_offset;
148 stripe_index = lmv_name_to_stripe_index(hash_type, stripe_count,
150 if (stripe_index < 0)
151 return ERR_PTR(stripe_index);
153 if ((lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION) && !post_migrate)
154 stripe_index += lsm->lsm_md_migrate_offset;
156 if (stripe_index >= lsm->lsm_md_stripe_count) {
157 CERROR("stripe_index %d stripe_count %d hash_type %#x "
158 "migrate_offset %d migrate_hash %#x name %.*s\n",
159 stripe_index, lsm->lsm_md_stripe_count,
160 lsm->lsm_md_hash_type, lsm->lsm_md_migrate_offset,
161 lsm->lsm_md_migrate_hash, namelen, name);
162 return ERR_PTR(-EBADF);
165 return &lsm->lsm_md_oinfo[stripe_index];
168 static inline bool lmv_is_dir_migrating(const struct lmv_stripe_md *lsm)
170 return lsm ? lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION : false;
173 static inline bool lmv_is_dir_bad_hash(const struct lmv_stripe_md *lsm)
178 if (lmv_is_dir_migrating(lsm)) {
179 if (lsm->lsm_md_stripe_count - lsm->lsm_md_migrate_offset > 1)
180 return !lmv_is_known_hash_type(
181 lsm->lsm_md_migrate_hash);
185 return !lmv_is_known_hash_type(lsm->lsm_md_hash_type);
188 static inline bool lmv_dir_retry_check_update(struct md_op_data *op_data)
190 const struct lmv_stripe_md *lsm = op_data->op_mea1;
195 if (lmv_is_dir_migrating(lsm) && !op_data->op_post_migrate) {
196 op_data->op_post_migrate = true;
200 if (lmv_is_dir_bad_hash(lsm) &&
201 op_data->op_stripe_index < lsm->lsm_md_stripe_count - 1) {
202 op_data->op_stripe_index++;
209 struct lmv_tgt_desc *lmv_locate_tgt(struct lmv_obd *lmv,
210 struct md_op_data *op_data,
213 int lmv_tunables_init(struct obd_device *obd);