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;
50 u16 lsme_stripe_count;
52 char lsme_pool_name[LOV_MAXPOOLNAME + 1];
53 struct lov_oinfo *lsme_oinfo[];
56 struct lov_stripe_md {
59 pid_t lsm_lock_owner; /* debugging */
61 /* maximum possible file size, might change as OSTs status changes,
62 * e.g. disconnected, deactivated */
69 struct lov_stripe_md_entry *lsm_entries[];
72 static inline bool lsm_has_objects(struct lov_stripe_md *lsm)
74 return lsm != NULL && !lsm->lsm_is_released;
77 static inline unsigned int lov_comp_index(int entry, int stripe)
79 LASSERT(entry >= 0 && entry <= SHRT_MAX);
80 LASSERT(stripe >= 0 && stripe < USHRT_MAX);
82 return entry << 16 | stripe;
85 static inline int lov_comp_stripe(int index)
87 return index & 0xffff;
90 static inline int lov_comp_entry(int index)
95 struct lsm_operations {
96 struct lov_stripe_md *(*lsm_unpackmd)(struct lov_obd *, void *, size_t);
99 extern const struct lsm_operations lsm_v1_ops;
100 extern const struct lsm_operations lsm_v3_ops;
101 extern const struct lsm_operations lsm_comp_md_v1_ops;
102 static inline const struct lsm_operations *lsm_op_find(int magic)
109 case LOV_MAGIC_COMP_V1:
110 return &lsm_comp_md_v1_ops;
112 CERROR("unrecognized lsm_magic %08x\n", magic);
117 void lsm_free(struct lov_stripe_md *lsm);
119 /* lov_do_div64(a, b) returns a % b, and a = a / b.
120 * The 32-bit code is LOV-specific due to knowing about stripe limits in
121 * order to reduce the divisor to a 32-bit number. If the divisor is
122 * already a 32-bit value the compiler handles this directly. */
123 #if BITS_PER_LONG == 64
124 # define lov_do_div64(n, base) ({ \
125 uint64_t __base = (base); \
127 __rem = ((uint64_t)(n)) % __base; \
128 (n) = ((uint64_t)(n)) / __base; \
131 #elif BITS_PER_LONG == 32
132 # define lov_do_div64(n, base) ({ \
134 if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \
136 LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov " \
137 "division %llu / %llu\n", (n), (uint64_t)(base)); \
138 __remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1); \
139 (n) >>= LOV_MIN_STRIPE_BITS; \
140 __rem = do_div(n, (base) >> LOV_MIN_STRIPE_BITS); \
141 __rem <<= LOV_MIN_STRIPE_BITS; \
142 __rem += __remainder; \
144 __rem = do_div(n, base); \
150 #define pool_tgt_size(p) ((p)->pool_obds.op_size)
151 #define pool_tgt_count(p) ((p)->pool_obds.op_count)
152 #define pool_tgt_array(p) ((p)->pool_obds.op_array)
153 #define pool_tgt_rw_sem(p) ((p)->pool_obds.op_rw_sem)
156 char pool_name[LOV_MAXPOOLNAME + 1];
157 struct ost_pool pool_obds;
158 atomic_t pool_refcount;
159 struct hlist_node pool_hash; /* access by poolname */
160 struct list_head pool_list; /* serial access */
161 struct proc_dir_entry *pool_proc_entry;
162 struct obd_device *pool_lobd; /* owner */
166 struct obd_info rq_oi;
167 struct lov_request_set *rq_rqset;
168 struct list_head rq_link;
169 int rq_idx; /* index in lov->tgts array */
172 struct lov_request_set {
173 struct obd_info *set_oi;
174 struct obd_device *set_obd;
176 atomic_t set_completes;
177 atomic_t set_success;
178 struct list_head set_list;
181 extern struct kmem_cache *lov_oinfo_slab;
183 extern struct lu_kmem_descr lov_caches[];
185 #define lov_uuid2str(lv, index) \
186 (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid)
189 int lov_merge_lvb_kms(struct lov_stripe_md *lsm, int index,
190 struct ost_lvb *lvb, __u64 *kms_place);
193 u64 lov_stripe_size(struct lov_stripe_md *lsm, int index,
194 u64 ost_size, int stripeno);
195 int lov_stripe_offset(struct lov_stripe_md *lsm, int index, loff_t lov_off,
196 int stripeno, loff_t *obd_off);
197 loff_t lov_size_to_stripe(struct lov_stripe_md *lsm, int index, u64 file_size,
199 int lov_stripe_intersects(struct lov_stripe_md *lsm, int index, int stripeno,
200 struct lu_extent *ext, u64 *obd_start, u64 *obd_end);
201 int lov_stripe_number(struct lov_stripe_md *lsm, int index, loff_t lov_off);
202 pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, int index,
203 pgoff_t stripe_index, int stripe);
206 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
207 struct lov_request_set **reqset);
208 int lov_fini_statfs_set(struct lov_request_set *set);
211 void lov_stripe_lock(struct lov_stripe_md *md);
212 void lov_stripe_unlock(struct lov_stripe_md *md);
213 void lov_fix_desc(struct lov_desc *desc);
214 void lov_fix_desc_stripe_size(__u64 *val);
215 void lov_fix_desc_stripe_count(__u32 *val);
216 void lov_fix_desc_pattern(__u32 *val);
217 void lov_fix_desc_qos_maxage(__u32 *val);
218 __u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count);
219 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
220 struct obd_connect_data *data);
221 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
222 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
223 __u32 *indexp, int *genp);
224 int lov_del_target(struct obd_device *obd, __u32 index,
225 struct obd_uuid *uuidp, int gen);
228 ssize_t lov_lsm_pack(const struct lov_stripe_md *lsm, void *buf,
230 struct lov_stripe_md *lov_unpackmd(struct lov_obd *lov, void *buf,
232 int lov_free_memmd(struct lov_stripe_md **lsmp);
234 void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm);
235 void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm);
236 void lov_dump_lmm_common(int level, void *lmmp);
237 void lov_dump_lmm(int level, void *lmm);
240 void lsm_free_plain(struct lov_stripe_md *lsm);
241 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm);
244 extern struct file_operations lov_proc_target_fops;
245 #ifdef CONFIG_PROC_FS
246 extern struct lprocfs_vars lprocfs_lov_obd_vars[];
250 extern struct lu_device_type lov_device_type;
253 extern struct cfs_hash_ops pool_hash_operations;
254 /* ost_pool methods */
255 int lov_ost_pool_init(struct ost_pool *op, unsigned int count);
256 int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
257 int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
258 int lov_ost_pool_remove(struct ost_pool *op, __u32 idx);
259 int lov_ost_pool_free(struct ost_pool *op);
261 /* high level pool methods */
262 int lov_pool_new(struct obd_device *obd, char *poolname);
263 int lov_pool_del(struct obd_device *obd, char *poolname);
264 int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname);
265 int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
266 void lov_dump_pool(int level, struct pool_desc *pool);
268 static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm)
270 LASSERT(atomic_read(&lsm->lsm_refc) > 0);
271 atomic_inc(&lsm->lsm_refc);
275 static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi)
277 if (unlikely(loi->loi_oi.oi.oi_id == 0 &&
278 loi->loi_oi.oi.oi_seq == 0 &&
279 loi->loi_ost_idx == 0 &&
280 loi->loi_ost_gen == 0))
286 static inline struct obd_device *lov2obd(const struct lov_obd *lov)
288 return container_of0(lov, struct obd_device, u.lov);