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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 lmv_stripe_md *lsm,
57 ldlm_blocking_callback cb_blocking,
58 int extra_lock_flags);
60 int lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
61 struct ptlrpc_request **preq);
62 void lmv_activate_target(struct lmv_obd *lmv, struct lmv_tgt_desc *tgt,
65 int lmv_statfs_check_update(struct obd_device *obd, struct lmv_tgt_desc *tgt);
67 static inline struct obd_device *lmv2obd_dev(struct lmv_obd *lmv)
69 return container_of_safe(lmv, struct obd_device, u.lmv);
72 static inline struct lu_tgt_desc *
73 lmv_tgt(struct lmv_obd *lmv, __u32 index)
75 return index < lmv->lmv_mdt_descs.ltd_tgts_size ?
76 LTD_TGT(&lmv->lmv_mdt_descs, index) : NULL;
80 lmv_mdt0_inited(struct lmv_obd *lmv)
82 return lmv->lmv_mdt_descs.ltd_tgts_size > 0 &&
83 test_bit(0, lmv->lmv_mdt_descs.ltd_tgt_bitmap);
86 #define lmv_foreach_tgt(lmv, tgt) ltd_foreach_tgt(&(lmv)->lmv_mdt_descs, tgt)
88 #define lmv_foreach_tgt_safe(lmv, tgt, tmp) \
89 ltd_foreach_tgt_safe(&(lmv)->lmv_mdt_descs, tgt, tmp)
92 struct lu_tgt_desc *lmv_first_connected_tgt(struct lmv_obd *lmv)
94 struct lu_tgt_desc *tgt;
96 tgt = ltd_first_tgt(&lmv->lmv_mdt_descs);
97 while (tgt && !tgt->ltd_exp)
98 tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
104 struct lu_tgt_desc *lmv_next_connected_tgt(struct lmv_obd *lmv,
105 struct lu_tgt_desc *tgt)
108 tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
109 } while (tgt && !tgt->ltd_exp);
114 #define lmv_foreach_connected_tgt(lmv, tgt) \
115 for (tgt = lmv_first_connected_tgt(lmv); tgt; \
116 tgt = lmv_next_connected_tgt(lmv, tgt))
119 lmv_fid2tgt_index(struct lmv_obd *lmv, const struct lu_fid *fid)
124 if (lmv->lmv_mdt_count < 2)
127 rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
134 static inline struct lmv_tgt_desc *
135 lmv_fid2tgt(struct lmv_obd *lmv, const struct lu_fid *fid)
137 struct lu_tgt_desc *tgt;
140 index = lmv_fid2tgt_index(lmv, fid);
142 return ERR_PTR(index);
144 tgt = lmv_tgt(lmv, index);
146 return tgt ? tgt : ERR_PTR(-ENODEV);
149 static inline int lmv_stripe_md_size(int stripe_count)
151 struct lmv_stripe_md *lsm;
153 return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
156 /* for file under migrating directory, return the target stripe info */
157 static inline const struct lmv_oinfo *
158 lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
159 int namelen, bool new_layout)
163 LASSERT(lmv_dir_striped(lsm));
165 stripe_index = __lmv_name_to_stripe_index(lsm->lsm_md_hash_type,
166 lsm->lsm_md_stripe_count,
167 lsm->lsm_md_migrate_hash,
168 lsm->lsm_md_migrate_offset,
169 name, namelen, new_layout);
170 if (stripe_index < 0)
171 return ERR_PTR(stripe_index);
173 return &lsm->lsm_md_oinfo[stripe_index];
176 static inline bool lmv_dir_retry_check_update(struct md_op_data *op_data)
178 const struct lmv_stripe_md *lsm = op_data->op_mea1;
183 if (lmv_dir_layout_changing(lsm) && !op_data->op_new_layout) {
184 op_data->op_new_layout = true;
188 if (lmv_dir_bad_hash(lsm) &&
189 op_data->op_stripe_index < lsm->lsm_md_stripe_count - 1) {
190 op_data->op_stripe_index++;
197 struct lmv_tgt_desc *lmv_locate_tgt(struct lmv_obd *lmv,
198 struct md_op_data *op_data);
199 int lmv_old_layout_lookup(struct lmv_obd *lmv, struct md_op_data *op_data);
202 int lmv_tunables_init(struct obd_device *obd);