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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 int lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
62 struct ptlrpc_request **preq);
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_of0(lmv, struct obd_device, u.lmv);
71 static inline struct lmv_tgt_desc *
72 lmv_get_target(struct lmv_obd *lmv, u32 mdt_idx, int *index)
76 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
77 if (lmv->tgts[i] == NULL)
80 if (lmv->tgts[i]->ltd_idx == mdt_idx) {
87 return ERR_PTR(-ENODEV);
91 lmv_find_target_index(struct lmv_obd *lmv, const struct lu_fid *fid)
93 struct lmv_tgt_desc *ltd;
97 if (lmv->desc.ld_tgt_count > 1) {
99 rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
104 ltd = lmv_get_target(lmv, mdt_idx, &index);
111 static inline struct lmv_tgt_desc *
112 lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
116 index = lmv_find_target_index(lmv, fid);
118 return ERR_PTR(index);
120 return lmv->tgts[index];
123 static inline int lmv_stripe_md_size(int stripe_count)
125 struct lmv_stripe_md *lsm;
127 return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
130 /* for file under migrating directory, return the target stripe info */
131 static inline const struct lmv_oinfo *
132 lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
133 int namelen, bool post_migrate)
135 __u32 hash_type = lsm->lsm_md_hash_type;
136 __u32 stripe_count = lsm->lsm_md_stripe_count;
139 if (hash_type & LMV_HASH_FLAG_MIGRATION) {
141 hash_type &= ~LMV_HASH_FLAG_MIGRATION;
142 stripe_count = lsm->lsm_md_migrate_offset;
144 hash_type = lsm->lsm_md_migrate_hash;
145 stripe_count -= lsm->lsm_md_migrate_offset;
149 stripe_index = lmv_name_to_stripe_index(hash_type, stripe_count,
151 if (stripe_index < 0)
152 return ERR_PTR(stripe_index);
154 if ((lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION) && !post_migrate)
155 stripe_index += lsm->lsm_md_migrate_offset;
157 if (stripe_index >= lsm->lsm_md_stripe_count) {
158 CERROR("stripe_index %d stripe_count %d hash_type %#x "
159 "migrate_offset %d migrate_hash %#x name %.*s\n",
160 stripe_index, lsm->lsm_md_stripe_count,
161 lsm->lsm_md_hash_type, lsm->lsm_md_migrate_offset,
162 lsm->lsm_md_migrate_hash, namelen, name);
163 return ERR_PTR(-EBADF);
166 return &lsm->lsm_md_oinfo[stripe_index];
169 static inline bool lmv_is_dir_migrating(const struct lmv_stripe_md *lsm)
171 return lsm ? lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION : false;
174 static inline bool lmv_is_dir_bad_hash(const struct lmv_stripe_md *lsm)
179 if (lmv_is_dir_migrating(lsm)) {
180 if (lsm->lsm_md_stripe_count - lsm->lsm_md_migrate_offset > 1)
181 return !lmv_is_known_hash_type(
182 lsm->lsm_md_migrate_hash);
186 return !lmv_is_known_hash_type(lsm->lsm_md_hash_type);
189 static inline bool lmv_dir_retry_check_update(struct md_op_data *op_data)
191 const struct lmv_stripe_md *lsm = op_data->op_mea1;
196 if (lmv_is_dir_migrating(lsm) && !op_data->op_post_migrate) {
197 op_data->op_post_migrate = true;
201 if (lmv_is_dir_bad_hash(lsm) &&
202 op_data->op_stripe_index < lsm->lsm_md_stripe_count - 1) {
203 op_data->op_stripe_index++;
210 struct lmv_tgt_desc *lmv_locate_tgt(struct lmv_obd *lmv,
211 struct md_op_data *op_data,
214 int lmv_tunables_init(struct obd_device *obd);