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, 2016, 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 <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;
51 u16 lsme_stripe_count;
53 char lsme_pool_name[LOV_MAXPOOLNAME + 1];
54 struct lov_oinfo *lsme_oinfo[];
57 static inline void copy_lsm_entry(struct lov_stripe_md_entry *dst,
58 struct lov_stripe_md_entry *src)
62 for (i = 0; i < src->lsme_stripe_count; i++)
63 *dst->lsme_oinfo[i] = *src->lsme_oinfo[i];
64 memcpy(dst, src, offsetof(typeof(*src), lsme_oinfo));
67 struct lov_stripe_md {
70 pid_t lsm_lock_owner; /* debugging */
72 /* maximum possible file size, might change as OSTs status changes,
73 * e.g. disconnected, deactivated */
80 struct lov_stripe_md_entry *lsm_entries[];
83 static inline bool lsme_inited(const struct lov_stripe_md_entry *lsme)
85 return lsme->lsme_flags & LCME_FL_INIT;
88 static inline bool lsm_entry_inited(const struct lov_stripe_md *lsm, int index)
90 return lsme_inited(lsm->lsm_entries[index]);
93 static inline bool lsm_is_composite(__u32 magic)
95 return !!(magic & LOV_MAGIC_COMP_V1);
98 static inline size_t lov_comp_md_size(const struct lov_stripe_md *lsm)
100 struct lov_stripe_md_entry *lsme;
104 if (lsm->lsm_magic == LOV_MAGIC_V1 || lsm->lsm_magic == LOV_MAGIC_V3)
105 return lov_mds_md_size(lsm->lsm_entries[0]->lsme_stripe_count,
106 lsm->lsm_entries[0]->lsme_magic);
108 LASSERT(lsm->lsm_magic == LOV_MAGIC_COMP_V1);
110 size = sizeof(struct lov_comp_md_v1);
111 for (entry = 0; entry < lsm->lsm_entry_count; entry++) {
114 lsme = lsm->lsm_entries[entry];
116 if (lsme_inited(lsme))
117 stripe_count = lsme->lsme_stripe_count;
121 size += sizeof(*lsme);
122 size += lov_mds_md_size(lsme->lsme_stripe_count,
129 static inline bool lsm_has_objects(struct lov_stripe_md *lsm)
131 return lsm != NULL && !lsm->lsm_is_released;
134 static inline unsigned int lov_comp_index(int entry, int stripe)
136 LASSERT(entry >= 0 && entry <= SHRT_MAX);
137 LASSERT(stripe >= 0 && stripe < USHRT_MAX);
139 return entry << 16 | stripe;
142 static inline int lov_comp_stripe(int index)
144 return index & 0xffff;
147 static inline int lov_comp_entry(int index)
152 struct lsm_operations {
153 struct lov_stripe_md *(*lsm_unpackmd)(struct lov_obd *, void *, size_t);
156 extern const struct lsm_operations lsm_v1_ops;
157 extern const struct lsm_operations lsm_v3_ops;
158 extern const struct lsm_operations lsm_comp_md_v1_ops;
159 static inline const struct lsm_operations *lsm_op_find(int magic)
166 case LOV_MAGIC_COMP_V1:
167 return &lsm_comp_md_v1_ops;
169 CERROR("unrecognized lsm_magic %08x\n", magic);
174 void lsm_free(struct lov_stripe_md *lsm);
176 /* lov_do_div64(a, b) returns a % b, and a = a / b.
177 * The 32-bit code is LOV-specific due to knowing about stripe limits in
178 * order to reduce the divisor to a 32-bit number. If the divisor is
179 * already a 32-bit value the compiler handles this directly. */
180 #if BITS_PER_LONG == 64
181 # define lov_do_div64(n, base) ({ \
182 uint64_t __base = (base); \
184 __rem = ((uint64_t)(n)) % __base; \
185 (n) = ((uint64_t)(n)) / __base; \
188 #elif BITS_PER_LONG == 32
189 # define lov_do_div64(n, base) ({ \
191 if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \
193 LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov " \
194 "division %llu / %llu\n", (n), (uint64_t)(base)); \
195 __remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1); \
196 (n) >>= LOV_MIN_STRIPE_BITS; \
197 __rem = do_div(n, (base) >> LOV_MIN_STRIPE_BITS); \
198 __rem <<= LOV_MIN_STRIPE_BITS; \
199 __rem += __remainder; \
201 __rem = do_div(n, base); \
207 #define pool_tgt_count(p) ((p)->pool_obds.op_count)
208 #define pool_tgt_array(p) ((p)->pool_obds.op_array)
209 #define pool_tgt_rw_sem(p) ((p)->pool_obds.op_rw_sem)
212 char pool_name[LOV_MAXPOOLNAME + 1];
213 struct ost_pool pool_obds;
214 atomic_t pool_refcount;
215 struct hlist_node pool_hash; /* access by poolname */
216 struct list_head pool_list; /* serial access */
217 struct proc_dir_entry *pool_proc_entry;
218 struct obd_device *pool_lobd; /* owner */
222 struct obd_info rq_oi;
223 struct lov_request_set *rq_rqset;
224 struct list_head rq_link;
225 int rq_idx; /* index in lov->tgts array */
228 struct lov_request_set {
229 struct obd_info *set_oi;
230 struct obd_device *set_obd;
232 atomic_t set_completes;
233 atomic_t set_success;
234 struct list_head set_list;
237 extern struct kmem_cache *lov_oinfo_slab;
239 extern struct lu_kmem_descr lov_caches[];
241 #define lov_uuid2str(lv, index) \
242 (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid)
245 int lov_merge_lvb_kms(struct lov_stripe_md *lsm, int index,
246 struct ost_lvb *lvb, __u64 *kms_place);
249 u64 lov_stripe_size(struct lov_stripe_md *lsm, int index,
250 u64 ost_size, int stripeno);
251 int lov_stripe_offset(struct lov_stripe_md *lsm, int index, loff_t lov_off,
252 int stripeno, loff_t *obd_off);
253 loff_t lov_size_to_stripe(struct lov_stripe_md *lsm, int index, u64 file_size,
255 int lov_stripe_intersects(struct lov_stripe_md *lsm, int index, int stripeno,
256 struct lu_extent *ext, u64 *obd_start, u64 *obd_end);
257 int lov_stripe_number(struct lov_stripe_md *lsm, int index, loff_t lov_off);
258 pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, int index,
259 pgoff_t stripe_index, int stripe);
262 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
263 struct lov_request_set **reqset);
264 int lov_fini_statfs_set(struct lov_request_set *set);
267 void lov_stripe_lock(struct lov_stripe_md *md);
268 void lov_stripe_unlock(struct lov_stripe_md *md);
269 void lov_fix_desc(struct lov_desc *desc);
270 void lov_fix_desc_stripe_size(__u64 *val);
271 void lov_fix_desc_stripe_count(__u32 *val);
272 void lov_fix_desc_pattern(__u32 *val);
273 void lov_fix_desc_qos_maxage(__u32 *val);
274 __u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count);
275 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
276 struct obd_connect_data *data);
277 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
278 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
279 __u32 *indexp, int *genp);
280 int lov_del_target(struct obd_device *obd, __u32 index,
281 struct obd_uuid *uuidp, int gen);
284 ssize_t lov_lsm_pack(const struct lov_stripe_md *lsm, void *buf,
286 struct lov_stripe_md *lov_unpackmd(struct lov_obd *lov, void *buf,
288 int lov_free_memmd(struct lov_stripe_md **lsmp);
290 void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm);
291 void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm);
292 void lov_dump_lmm_common(int level, void *lmmp);
293 void lov_dump_lmm(int level, void *lmm);
296 void lsm_free_plain(struct lov_stripe_md *lsm);
297 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm);
300 extern struct file_operations lov_proc_target_fops;
301 #ifdef CONFIG_PROC_FS
302 extern struct lprocfs_vars lprocfs_lov_obd_vars[];
306 extern struct lu_device_type lov_device_type;
309 extern struct cfs_hash_ops pool_hash_operations;
310 /* ost_pool methods */
311 int lov_ost_pool_init(struct ost_pool *op, unsigned int count);
312 int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
313 int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
314 int lov_ost_pool_remove(struct ost_pool *op, __u32 idx);
315 int lov_ost_pool_free(struct ost_pool *op);
317 /* high level pool methods */
318 int lov_pool_new(struct obd_device *obd, char *poolname);
319 int lov_pool_del(struct obd_device *obd, char *poolname);
320 int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname);
321 int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
322 void lov_dump_pool(int level, struct pool_desc *pool);
324 static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm)
326 LASSERT(atomic_read(&lsm->lsm_refc) > 0);
327 atomic_inc(&lsm->lsm_refc);
331 static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi)
333 if (unlikely(loi->loi_oi.oi.oi_id == 0 &&
334 loi->loi_oi.oi.oi_seq == 0 &&
335 loi->loi_ost_idx == 0 &&
336 loi->loi_ost_gen == 0))
342 static inline struct obd_device *lov2obd(const struct lov_obd *lov)
344 return container_of0(lov, struct obd_device, u.lov);
347 static inline void lov_lsm2layout(struct lov_stripe_md *lsm,
348 struct lov_stripe_md_entry *lsme,
349 struct ost_layout *ol)
351 ol->ol_stripe_size = lsme->lsme_stripe_size;
352 ol->ol_stripe_count = lsme->lsme_stripe_count;
353 if (lsm->lsm_magic == LOV_MAGIC_COMP_V1) {
354 ol->ol_comp_start = lsme->lsme_extent.e_start;
355 ol->ol_comp_end = lsme->lsme_extent.e_end;
356 ol->ol_comp_id = lsme->lsme_id;
358 ol->ol_comp_start = 0;