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/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #ifndef LOV_INTERNAL_H
34 #define LOV_INTERNAL_H
36 #include <obd_class.h>
37 #include <uapi/linux/lustre/lustre_user.h>
39 /* If we are unable to get the maximum object size from the OST in
40 * ocd_maxbytes using OBD_CONNECT_MAXBYTES, then we fall back to using
41 * the old maximum object size from ext3. */
42 #define LUSTRE_EXT3_STRIPE_MAXBYTES 0x1fffffff000ULL
44 struct lov_stripe_md_entry {
45 struct lu_extent lsme_extent;
52 u16 lsme_stripe_count;
54 char lsme_pool_name[LOV_MAXPOOLNAME + 1];
55 struct lov_oinfo *lsme_oinfo[];
58 static inline bool lsme_is_dom(struct lov_stripe_md_entry *lsme)
60 return (lov_pattern(lsme->lsme_pattern) == LOV_PATTERN_MDT);
63 static inline void copy_lsm_entry(struct lov_stripe_md_entry *dst,
64 struct lov_stripe_md_entry *src)
68 for (i = 0; i < src->lsme_stripe_count; i++)
69 *dst->lsme_oinfo[i] = *src->lsme_oinfo[i];
70 memcpy(dst, src, offsetof(typeof(*src), lsme_oinfo));
73 struct lov_stripe_md {
76 pid_t lsm_lock_owner; /* debugging */
79 /* maximum possible file size, might change as OSTs status
80 * changes, e.g. disconnected, deactivated
83 /* size of full foreign LOV */
84 size_t lsm_foreign_size;
93 struct lov_stripe_md_entry *lsm_entries[];
96 #define lsm_foreign(lsm) (lsm->lsm_entries[0])
98 static inline bool lsme_inited(const struct lov_stripe_md_entry *lsme)
100 return lsme->lsme_flags & LCME_FL_INIT;
103 static inline bool lsm_entry_inited(const struct lov_stripe_md *lsm, int index)
105 return lsme_inited(lsm->lsm_entries[index]);
108 static inline bool lsm_is_composite(__u32 magic)
110 return magic == LOV_MAGIC_COMP_V1;
113 static inline size_t lov_comp_md_size(const struct lov_stripe_md *lsm)
115 struct lov_stripe_md_entry *lsme;
119 if (lsm->lsm_magic == LOV_MAGIC_V1 || lsm->lsm_magic == LOV_MAGIC_V3)
120 return lov_mds_md_size(lsm->lsm_entries[0]->lsme_stripe_count,
121 lsm->lsm_entries[0]->lsme_magic);
123 if (lsm->lsm_magic == LOV_MAGIC_FOREIGN)
124 return lsm->lsm_foreign_size;
126 LASSERT(lsm->lsm_magic == LOV_MAGIC_COMP_V1);
128 size = sizeof(struct lov_comp_md_v1);
129 for (entry = 0; entry < lsm->lsm_entry_count; entry++) {
132 lsme = lsm->lsm_entries[entry];
134 if (lsme_inited(lsme))
135 stripe_count = lsme->lsme_stripe_count;
139 size += sizeof(*lsme);
140 size += lov_mds_md_size(lsme->lsme_stripe_count,
147 static inline bool lsm_has_objects(struct lov_stripe_md *lsm)
149 return lsm != NULL && !lsm->lsm_is_released;
152 static inline unsigned int lov_comp_index(int entry, int stripe)
154 LASSERT(entry >= 0 && entry <= SHRT_MAX);
155 LASSERT(stripe >= 0 && stripe < USHRT_MAX);
157 return entry << 16 | stripe;
160 static inline int lov_comp_stripe(int index)
162 return index & 0xffff;
165 static inline int lov_comp_entry(int index)
170 struct lsm_operations {
171 struct lov_stripe_md *(*lsm_unpackmd)(struct lov_obd *, void *, size_t);
174 extern const struct lsm_operations lsm_v1_ops;
175 extern const struct lsm_operations lsm_v3_ops;
176 extern const struct lsm_operations lsm_comp_md_v1_ops;
177 extern const struct lsm_operations lsm_foreign_ops;
178 static inline const struct lsm_operations *lsm_op_find(int magic)
185 case LOV_MAGIC_COMP_V1:
186 return &lsm_comp_md_v1_ops;
187 case LOV_MAGIC_FOREIGN:
188 return &lsm_foreign_ops;
190 CERROR("unrecognized lsm_magic %08x\n", magic);
195 void lsm_free(struct lov_stripe_md *lsm);
197 /* lov_do_div64(a, b) returns a % b, and a = a / b.
198 * The 32-bit code is LOV-specific due to knowing about stripe limits in
199 * order to reduce the divisor to a 32-bit number. If the divisor is
200 * already a 32-bit value the compiler handles this directly. */
201 #if BITS_PER_LONG == 64
202 # define lov_do_div64(n, base) ({ \
203 uint64_t __base = (base); \
205 __rem = ((uint64_t)(n)) % __base; \
206 (n) = ((uint64_t)(n)) / __base; \
209 #elif BITS_PER_LONG == 32
210 # define lov_do_div64(n, base) ({ \
211 uint64_t __num = (n); \
213 if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \
215 LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), \
216 "64 bit lov division %llu / %llu\n", \
217 __num, (uint64_t)(base)); \
218 __remainder = __num & (LOV_MIN_STRIPE_SIZE - 1); \
219 __num >>= LOV_MIN_STRIPE_BITS; \
220 __rem = do_div(__num, (base) >> LOV_MIN_STRIPE_BITS); \
221 __rem <<= LOV_MIN_STRIPE_BITS; \
222 __rem += __remainder; \
224 __rem = do_div(__num, base); \
231 #define pool_tgt_count(p) ((p)->pool_obds.op_count)
232 #define pool_tgt_array(p) ((p)->pool_obds.op_array)
233 #define pool_tgt_rw_sem(p) ((p)->pool_obds.op_rw_sem)
236 char pool_name[LOV_MAXPOOLNAME + 1];
237 struct ost_pool pool_obds;
238 atomic_t pool_refcount;
239 struct hlist_node pool_hash; /* access by poolname */
240 struct list_head pool_list; /* serial access */
241 struct proc_dir_entry *pool_proc_entry;
242 struct obd_device *pool_lobd; /* owner */
246 struct obd_info rq_oi;
247 struct lov_request_set *rq_rqset;
248 struct list_head rq_link;
249 int rq_idx; /* index in lov->tgts array */
252 struct lov_request_set {
253 struct obd_info *set_oi;
254 struct obd_device *set_obd;
256 atomic_t set_completes;
257 atomic_t set_success;
258 struct list_head set_list;
261 extern struct kmem_cache *lov_oinfo_slab;
263 extern struct lu_kmem_descr lov_caches[];
265 #define lov_uuid2str(lv, index) \
266 (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid)
269 int lov_merge_lvb_kms(struct lov_stripe_md *lsm, int index,
270 struct ost_lvb *lvb, __u64 *kms_place);
273 u64 lov_stripe_size(struct lov_stripe_md *lsm, int index,
274 u64 ost_size, int stripeno);
275 int lov_stripe_offset(struct lov_stripe_md *lsm, int index, loff_t lov_off,
276 int stripeno, loff_t *obd_off);
277 loff_t lov_size_to_stripe(struct lov_stripe_md *lsm, int index, u64 file_size,
279 int lov_stripe_intersects(struct lov_stripe_md *lsm, int index, int stripeno,
280 struct lu_extent *ext, u64 *obd_start, u64 *obd_end);
281 int lov_stripe_number(struct lov_stripe_md *lsm, int index, loff_t lov_off);
282 pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, int index,
283 pgoff_t stripe_index, int stripe);
286 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
287 struct lov_request_set **reqset);
288 int lov_fini_statfs_set(struct lov_request_set *set);
291 void lov_tgts_getref(struct obd_device *obd);
292 void lov_tgts_putref(struct obd_device *obd);
293 void lov_stripe_lock(struct lov_stripe_md *md);
294 void lov_stripe_unlock(struct lov_stripe_md *md);
295 void lov_fix_desc(struct lov_desc *desc);
296 void lov_fix_desc_stripe_size(__u64 *val);
297 void lov_fix_desc_stripe_count(__u32 *val);
298 void lov_fix_desc_pattern(__u32 *val);
299 void lov_fix_desc_qos_maxage(__u32 *val);
300 __u16 lov_get_stripe_count(struct lov_obd *lov, __u32 magic,
302 int lov_connect_obd(struct obd_device *obd, u32 index, int activate,
303 struct obd_connect_data *data);
304 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
305 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
306 u32 *indexp, int *genp);
307 int lov_del_target(struct obd_device *obd, u32 index,
308 struct obd_uuid *uuidp, int gen);
311 ssize_t lov_lsm_pack(const struct lov_stripe_md *lsm, void *buf,
313 struct lov_stripe_md *lov_unpackmd(struct lov_obd *lov, void *buf,
315 int lov_free_memmd(struct lov_stripe_md **lsmp);
317 void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm);
318 void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm);
319 void lov_dump_lmm_common(int level, void *lmmp);
320 void lov_dump_lmm(int level, void *lmm);
323 void lsm_free_plain(struct lov_stripe_md *lsm);
324 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm);
327 int lov_tunables_init(struct obd_device *obd);
330 extern struct lu_device_type lov_device_type;
332 #define LOV_MDC_TGT_MAX 256
335 extern struct cfs_hash_ops pool_hash_operations;
336 /* ost_pool methods */
337 int lov_ost_pool_init(struct ost_pool *op, unsigned int count);
338 int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
339 int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
340 int lov_ost_pool_remove(struct ost_pool *op, __u32 idx);
341 int lov_ost_pool_free(struct ost_pool *op);
343 /* high level pool methods */
344 int lov_pool_new(struct obd_device *obd, char *poolname);
345 int lov_pool_del(struct obd_device *obd, char *poolname);
346 int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname);
347 int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
348 void lov_dump_pool(int level, struct pool_desc *pool);
350 static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm)
352 LASSERT(atomic_read(&lsm->lsm_refc) > 0);
353 atomic_inc(&lsm->lsm_refc);
357 static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi)
359 if (unlikely(loi->loi_oi.oi.oi_id == 0 &&
360 loi->loi_oi.oi.oi_seq == 0 &&
361 loi->loi_ost_idx == 0 &&
362 loi->loi_ost_gen == 0))
368 static inline struct obd_device *lov2obd(const struct lov_obd *lov)
370 return container_of0(lov, struct obd_device, u.lov);
373 static inline void lov_lsm2layout(struct lov_stripe_md *lsm,
374 struct lov_stripe_md_entry *lsme,
375 struct ost_layout *ol)
377 ol->ol_stripe_size = lsme->lsme_stripe_size;
378 ol->ol_stripe_count = lsme->lsme_stripe_count;
379 if (lsm->lsm_magic == LOV_MAGIC_COMP_V1) {
380 ol->ol_comp_start = lsme->lsme_extent.e_start;
381 ol->ol_comp_end = lsme->lsme_extent.e_end;
382 ol->ol_comp_id = lsme->lsme_id;
384 ol->ol_comp_start = 0;