4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
32 #ifndef LOV_INTERNAL_H
33 #define LOV_INTERNAL_H
35 #include <obd_class.h>
36 #include <uapi/linux/lustre/lustre_user.h>
38 /* If we are unable to get the maximum object size from the OST in
39 * ocd_maxbytes using OBD_CONNECT_MAXBYTES, then we fall back to using
40 * the old maximum object size from ext3. */
41 #define LUSTRE_EXT3_STRIPE_MAXBYTES 0x1fffffff000ULL
43 struct lov_stripe_md_entry {
44 struct lu_extent lsme_extent;
51 struct { /* For stripe objects */
53 u16 lsme_stripe_count;
55 char lsme_pool_name[LOV_MAXPOOLNAME + 1];
56 struct lov_oinfo *lsme_oinfo[];
58 struct { /* For foreign layout (i.e. HSM, DAOS) */
61 u32 lsme_foreign_flags;
64 /* inline HSM layout data */
65 struct lov_hsm_base lsme_hsm;
66 /* Other kind of foreign layout (i.e. DAOS) */
73 #define lsme_archive_id lsme_hsm.lhb_archive_id
74 #define lsme_archive_ver lsme_hsm.lhb_archive_ver
75 #define lsme_uuid lsme_hsm.lhb_uuid
77 static inline bool lsme_is_dom(struct lov_stripe_md_entry *lsme)
79 return (lov_pattern(lsme->lsme_pattern) & LOV_PATTERN_MDT);
82 static inline void copy_lsm_entry(struct lov_stripe_md_entry *dst,
83 struct lov_stripe_md_entry *src)
87 for (i = 0; i < src->lsme_stripe_count; i++)
88 *dst->lsme_oinfo[i] = *src->lsme_oinfo[i];
89 memcpy(dst, src, offsetof(typeof(*src), lsme_oinfo));
92 struct lov_stripe_md {
95 pid_t lsm_lock_owner; /* debugging */
98 /* maximum possible file size, might change as OSTs status
99 * changes, e.g. disconnected, deactivated
102 /* size of full foreign LOV */
103 size_t lsm_foreign_size;
105 struct ost_id lsm_oi;
109 bool lsm_is_released;
111 u16 lsm_mirror_count;
113 struct lov_stripe_md_entry *lsm_entries[];
116 #define lsm_foreign(lsm) (lsm->lsm_entries[0])
118 static inline bool lsme_is_foreign(const struct lov_stripe_md_entry *lsme)
120 return lsme->lsme_magic == LOV_MAGIC_FOREIGN;
123 static inline bool lsm_entry_is_foreign(const struct lov_stripe_md *lsm,
126 return lsme_is_foreign(lsm->lsm_entries[index]);
129 static inline bool lsme_inited(const struct lov_stripe_md_entry *lsme)
131 return lsme->lsme_flags & LCME_FL_INIT;
134 static inline bool lsm_entry_inited(const struct lov_stripe_md *lsm, int index)
136 return lsme_inited(lsm->lsm_entries[index]);
139 static inline bool lsm_is_composite(__u32 magic)
141 return magic == LOV_MAGIC_COMP_V1;
144 static inline bool lsm_is_rdonly(const struct lov_stripe_md *lsm)
146 return lsm->lsm_is_rdonly;
149 static inline size_t lov_comp_md_size(const struct lov_stripe_md *lsm)
151 struct lov_stripe_md_entry *lsme;
155 if (lsm->lsm_magic == LOV_MAGIC_V1 || lsm->lsm_magic == LOV_MAGIC_V3)
156 return lov_mds_md_size(lsm->lsm_entries[0]->lsme_stripe_count,
157 lsm->lsm_entries[0]->lsme_magic);
159 if (lsm->lsm_magic == LOV_MAGIC_FOREIGN)
160 return lsm->lsm_foreign_size;
162 LASSERT(lsm->lsm_magic == LOV_MAGIC_COMP_V1);
164 size = sizeof(struct lov_comp_md_v1) +
165 sizeof(struct lov_comp_md_entry_v1) * lsm->lsm_entry_count;
166 for (entry = 0; entry < lsm->lsm_entry_count; entry++) {
169 lsme = lsm->lsm_entries[entry];
171 if (lsme->lsme_magic == LOV_MAGIC_FOREIGN) {
172 size += lov_foreign_md_size(lsme->lsme_length);
174 if (lsme_inited(lsme))
175 stripe_count = lsme->lsme_stripe_count;
179 size += lov_mds_md_size(stripe_count, lsme->lsme_magic);
186 static inline bool lsm_has_objects(struct lov_stripe_md *lsm)
188 return lsm != NULL && !lsm->lsm_is_released;
191 static inline unsigned int lov_comp_index(int entry, int stripe)
193 LASSERT(entry >= 0 && entry <= SHRT_MAX);
194 LASSERT(stripe >= 0 && stripe < USHRT_MAX);
196 return entry << 16 | stripe;
199 static inline int lov_comp_stripe(int index)
201 return index & 0xffff;
204 static inline int lov_comp_entry(int index)
209 struct lsm_operations {
210 struct lov_stripe_md *(*lsm_unpackmd)(struct lov_obd *, void *, size_t);
213 const struct lsm_operations *lsm_op_find(int magic);
214 void lsm_free(struct lov_stripe_md *lsm);
216 static inline bool lov_supported_comp_magic(unsigned int magic)
218 return magic == LOV_MAGIC_V1 || magic == LOV_MAGIC_V3 ||
219 magic == LOV_MAGIC_FOREIGN;
222 #define pool_tgt_count(p) ((p)->pool_obds.op_count)
223 #define pool_tgt_array(p) ((p)->pool_obds.op_array)
224 #define pool_tgt_rw_sem(p) ((p)->pool_obds.op_rw_sem)
226 struct lov_pool_desc {
227 char pool_name[LOV_MAXPOOLNAME + 1];
228 struct lu_tgt_pool pool_obds;
229 struct kref pool_refcount;
230 struct rhash_head pool_hash; /* access by poolname */
231 struct list_head pool_list; /* serial access */
232 struct rcu_head pool_rcu;
233 struct proc_dir_entry *pool_proc_entry;
234 struct obd_device *pool_lobd; /* owner */
237 int lov_pool_hash_init(struct rhashtable *tbl);
238 void lov_pool_hash_destroy(struct rhashtable *tbl);
241 struct obd_info rq_oi;
242 struct lov_request_set *rq_rqset;
243 struct list_head rq_link;
244 int rq_idx; /* index in lov->tgts array */
247 struct lov_request_set {
248 struct obd_info *set_oi;
249 struct obd_device *set_obd;
251 atomic_t set_completes;
252 atomic_t set_success;
253 struct list_head set_list;
256 extern struct kmem_cache *lov_oinfo_slab;
258 extern struct lu_kmem_descr lov_caches[];
260 #define lov_uuid2str(lv, index) \
261 (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid)
264 int lov_merge_lvb_kms(struct lov_stripe_md *lsm, int index,
265 struct cl_attr *attr);
268 u64 stripe_width(struct lov_stripe_md *lsm, unsigned int index);
269 u64 lov_stripe_size(struct lov_stripe_md *lsm, int index,
270 u64 ost_size, int stripeno);
271 int lov_stripe_offset(struct lov_stripe_md *lsm, int index, loff_t lov_off,
272 int stripeno, loff_t *obd_off);
273 loff_t lov_size_to_stripe(struct lov_stripe_md *lsm, int index, u64 file_size,
275 int lov_stripe_intersects(struct lov_stripe_md *lsm, int index, int stripeno,
276 struct lu_extent *ext, u64 *obd_start, u64 *obd_end);
277 int lov_stripe_number(struct lov_stripe_md *lsm, int index, u64 lov_off);
278 pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, int index,
279 pgoff_t stripe_index, int stripe);
282 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
283 struct lov_request_set **reqset);
284 int lov_fini_statfs_set(struct lov_request_set *set);
287 void lov_tgts_getref(struct obd_device *obd);
288 void lov_tgts_putref(struct obd_device *obd);
289 void lov_stripe_lock(struct lov_stripe_md *md);
290 void lov_stripe_unlock(struct lov_stripe_md *md);
291 void lov_fix_desc(struct lov_desc *desc);
292 void lov_fix_desc_stripe_size(__u64 *val);
293 void lov_fix_desc_stripe_count(__u32 *val);
294 void lov_fix_desc_pattern(__u32 *val);
295 void lov_fix_desc_qos_maxage(__u32 *val);
296 __u16 lov_get_stripe_count(struct lov_obd *lov, __u32 magic,
298 int lov_connect_obd(struct obd_device *obd, u32 index, int activate,
299 struct obd_connect_data *data);
300 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
301 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
302 u32 *indexp, int *genp);
303 int lov_del_target(struct obd_device *obd, u32 index,
304 struct obd_uuid *uuidp, int gen);
307 ssize_t lov_lsm_pack(const struct lov_stripe_md *lsm, void *buf,
309 struct lov_stripe_md *lov_unpackmd(struct lov_obd *lov, void *buf,
311 int lov_free_memmd(struct lov_stripe_md **lsmp);
313 void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm);
314 void lov_dump_lmm_common(int level, void *lmmp);
317 void lsm_free_plain(struct lov_stripe_md *lsm);
318 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm);
321 int lov_tunables_init(struct obd_device *obd);
324 extern struct lu_device_type lov_device_type;
326 #define LOV_MDC_TGT_MAX 256
328 /* high level pool methods */
329 int lov_pool_new(struct obd_device *obd, char *poolname);
330 int lov_pool_del(struct obd_device *obd, char *poolname);
331 int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname);
332 int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
334 static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm)
336 LASSERT(atomic_read(&lsm->lsm_refc) > 0);
337 atomic_inc(&lsm->lsm_refc);
341 static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi)
343 if (unlikely(loi->loi_oi.oi.oi_id == 0 &&
344 loi->loi_oi.oi.oi_seq == 0 &&
345 loi->loi_ost_idx == 0 &&
346 loi->loi_ost_gen == 0))
352 static inline struct obd_device *lov2obd(const struct lov_obd *lov)
354 return container_of_safe(lov, struct obd_device, u.lov);
357 static inline void lov_lsm2layout(struct lov_stripe_md *lsm,
358 struct lov_stripe_md_entry *lsme,
359 struct ost_layout *ol)
361 ol->ol_stripe_size = lsme->lsme_stripe_size;
362 ol->ol_stripe_count = lsme->lsme_stripe_count;
363 if (lsm->lsm_magic == LOV_MAGIC_COMP_V1) {
364 ol->ol_comp_start = lsme->lsme_extent.e_start;
365 ol->ol_comp_end = lsme->lsme_extent.e_end;
366 ol->ol_comp_id = lsme->lsme_id;
368 ol->ol_comp_start = 0;
374 struct lov_pool_desc *lov_pool_find(struct obd_device *obd, char *poolname);
375 void lov_pool_putref(struct lov_pool_desc *pool);