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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(const struct lu_env *env, struct obd_export *exp,
53 struct lu_fid *fid, struct md_op_data *op_data);
55 int lmv_revalidate_slaves(struct obd_export *exp,
56 const struct lu_fid *pfid,
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);
63 void lmv_activate_target(struct lmv_obd *lmv, struct lmv_tgt_desc *tgt,
66 int lmv_statfs_check_update(struct obd_device *obd, struct lmv_tgt_desc *tgt);
68 static inline struct obd_device *lmv2obd_dev(struct lmv_obd *lmv)
70 return container_of_safe(lmv, struct obd_device, u.lmv);
73 static inline struct lu_tgt_desc *
74 lmv_tgt(struct lmv_obd *lmv, __u32 index)
76 return index < lmv->lmv_mdt_descs.ltd_tgts_size ?
77 LTD_TGT(&lmv->lmv_mdt_descs, index) : NULL;
81 lmv_mdt0_inited(struct lmv_obd *lmv)
83 return lmv->lmv_mdt_descs.ltd_tgts_size > 0 &&
84 test_bit(0, lmv->lmv_mdt_descs.ltd_tgt_bitmap);
87 #define lmv_foreach_tgt(lmv, tgt) ltd_foreach_tgt(&(lmv)->lmv_mdt_descs, tgt)
89 #define lmv_foreach_tgt_safe(lmv, tgt, tmp) \
90 ltd_foreach_tgt_safe(&(lmv)->lmv_mdt_descs, tgt, tmp)
93 struct lu_tgt_desc *lmv_first_connected_tgt(struct lmv_obd *lmv)
95 struct lu_tgt_desc *tgt;
97 tgt = ltd_first_tgt(&lmv->lmv_mdt_descs);
98 while (tgt && !tgt->ltd_exp)
99 tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
105 struct lu_tgt_desc *lmv_next_connected_tgt(struct lmv_obd *lmv,
106 struct lu_tgt_desc *tgt)
109 tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
110 } while (tgt && !tgt->ltd_exp);
115 #define lmv_foreach_connected_tgt(lmv, tgt) \
116 for (tgt = lmv_first_connected_tgt(lmv); tgt; \
117 tgt = lmv_next_connected_tgt(lmv, tgt))
120 lmv_fid2tgt_index(struct lmv_obd *lmv, const struct lu_fid *fid)
125 if (lmv->lmv_mdt_count < 2)
128 rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
135 static inline struct lmv_tgt_desc *
136 lmv_fid2tgt(struct lmv_obd *lmv, const struct lu_fid *fid)
138 struct lu_tgt_desc *tgt;
141 index = lmv_fid2tgt_index(lmv, fid);
143 return ERR_PTR(index);
145 tgt = lmv_tgt(lmv, index);
147 return tgt ? tgt : ERR_PTR(-ENODEV);
150 static inline int lmv_stripe_md_size(int stripe_count)
152 struct lmv_stripe_md *lsm;
154 return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
157 /* for file under migrating directory, return the target stripe info */
158 static inline const struct lmv_oinfo *
159 lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
160 int namelen, bool new_layout)
164 LASSERT(lmv_dir_striped(lsm));
166 stripe_index = __lmv_name_to_stripe_index(lsm->lsm_md_hash_type,
167 lsm->lsm_md_stripe_count,
168 lsm->lsm_md_migrate_hash,
169 lsm->lsm_md_migrate_offset,
170 name, namelen, new_layout);
171 if (stripe_index < 0)
172 return ERR_PTR(stripe_index);
174 return &lsm->lsm_md_oinfo[stripe_index];
177 static inline bool lmv_dir_retry_check_update(struct md_op_data *op_data)
179 const struct lmv_stripe_md *lsm = op_data->op_mea1;
184 if (lmv_dir_layout_changing(lsm) && !op_data->op_new_layout) {
185 op_data->op_new_layout = true;
189 if (lmv_dir_bad_hash(lsm) &&
190 op_data->op_stripe_index < lsm->lsm_md_stripe_count - 1) {
191 op_data->op_stripe_index++;
198 struct lmv_tgt_desc *lmv_locate_tgt(struct lmv_obd *lmv,
199 struct md_op_data *op_data);
200 int lmv_old_layout_lookup(struct lmv_obd *lmv, struct md_op_data *op_data);
203 int lmv_tunables_init(struct obd_device *obd);