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, 2015, 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_idl.h>
40 * If we are unable to get the maximum object size from the OST in
41 * ocd_maxbytes using OBD_CONNECT_MAXBYTES, then we fall back to using
42 * the old maximum object size from ext3.
44 #define LUSTRE_EXT3_STRIPE_MAXBYTES 0x1fffffff000ULL
46 struct lov_stripe_md {
49 pid_t lsm_lock_owner; /* debugging */
52 * maximum possible file size, might change as OSTs status changes,
53 * e.g. disconnected, deactivated
59 u32 lsm_pattern; /* RAID0, RAID1, released, ... */
62 char lsm_pool_name[LOV_MAXPOOLNAME + 1];
63 struct lov_oinfo *lsm_oinfo[0];
66 static inline bool lsm_is_released(struct lov_stripe_md *lsm)
68 return !!(lsm->lsm_pattern & LOV_PATTERN_F_RELEASED);
71 static inline bool lsm_has_objects(struct lov_stripe_md *lsm)
76 if (lsm_is_released(lsm))
82 struct lsm_operations {
83 void (*lsm_free)(struct lov_stripe_md *);
84 void (*lsm_stripe_by_index)(struct lov_stripe_md *, int *, loff_t *,
86 void (*lsm_stripe_by_offset)(struct lov_stripe_md *, int *, loff_t *,
88 int (*lsm_lmm_verify)(struct lov_mds_md *lmm, int lmm_bytes,
90 int (*lsm_unpackmd)(struct lov_obd *lov, struct lov_stripe_md *lsm,
91 struct lov_mds_md *lmm);
94 extern const struct lsm_operations lsm_v1_ops;
95 extern const struct lsm_operations lsm_v3_ops;
97 static inline const struct lsm_operations *lsm_op_find(int magic)
105 CERROR("unrecognized lsm_magic %08x\n", magic);
110 /* lov_do_div64(a, b) returns a % b, and a = a / b.
111 * The 32-bit code is LOV-specific due to knowing about stripe limits in
112 * order to reduce the divisor to a 32-bit number. If the divisor is
113 * already a 32-bit value the compiler handles this directly.
115 #if BITS_PER_LONG == 64
116 # define lov_do_div64(n, base) ({ \
117 uint64_t __base = (base); \
119 __rem = ((uint64_t)(n)) % __base; \
120 (n) = ((uint64_t)(n)) / __base; \
123 #elif BITS_PER_LONG == 32
124 # define lov_do_div64(n, base) ({ \
126 if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \
128 LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov " \
129 "division %llu / %llu\n", (n), (uint64_t)(base)); \
130 __remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1); \
131 (n) >>= LOV_MIN_STRIPE_BITS; \
132 __rem = do_div(n, (base) >> LOV_MIN_STRIPE_BITS); \
133 __rem <<= LOV_MIN_STRIPE_BITS; \
134 __rem += __remainder; \
136 __rem = do_div(n, base); \
142 #define pool_tgt_size(p) ((p)->pool_obds.op_size)
143 #define pool_tgt_count(p) ((p)->pool_obds.op_count)
144 #define pool_tgt_array(p) ((p)->pool_obds.op_array)
145 #define pool_tgt_rw_sem(p) ((p)->pool_obds.op_rw_sem)
148 char pool_name[LOV_MAXPOOLNAME + 1];
149 struct ost_pool pool_obds;
150 atomic_t pool_refcount;
151 struct hlist_node pool_hash; /* access by poolname */
152 struct list_head pool_list; /* serial access */
153 struct dentry *pool_debugfs_entry; /* file in debugfs */
154 struct obd_device *pool_lobd; /* owner */
158 struct obd_info rq_oi;
159 struct lov_request_set *rq_rqset;
161 struct list_head rq_link;
163 int rq_idx; /* index in lov->tgts array */
166 struct lov_request_set {
167 struct obd_info *set_oi;
168 struct obd_device *set_obd;
170 atomic_t set_completes;
171 atomic_t set_success;
172 struct list_head set_list;
175 extern struct kmem_cache *lov_oinfo_slab;
177 extern struct lu_kmem_descr lov_caches[];
179 #define lov_uuid2str(lv, index) \
180 (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid)
183 int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
184 struct ost_lvb *lvb, __u64 *kms_place);
187 u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size, int stripeno);
188 int lov_stripe_offset(struct lov_stripe_md *lsm, u64 lov_off,
189 int stripeno, u64 *u64);
190 u64 lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size, int stripeno);
191 int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno,
193 u64 *obd_start, u64 *obd_end);
194 int lov_stripe_number(struct lov_stripe_md *lsm, u64 lov_off);
195 pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, pgoff_t stripe_index,
199 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
200 struct lov_request_set **reqset);
201 int lov_fini_statfs_set(struct lov_request_set *set);
204 void lov_stripe_lock(struct lov_stripe_md *md);
205 void lov_stripe_unlock(struct lov_stripe_md *md);
206 void lov_fix_desc(struct lov_desc *desc);
207 void lov_fix_desc_stripe_size(__u64 *val);
208 void lov_fix_desc_stripe_count(__u32 *val);
209 void lov_fix_desc_pattern(__u32 *val);
210 void lov_fix_desc_qos_maxage(__u32 *val);
211 __u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count);
212 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
213 struct obd_connect_data *data);
214 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
215 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
216 __u32 *indexp, int *genp);
217 int lov_del_target(struct obd_device *obd, __u32 index,
218 struct obd_uuid *uuidp, int gen);
221 ssize_t lov_lsm_pack(const struct lov_stripe_md *lsm, void *buf,
223 struct lov_stripe_md *lov_unpackmd(struct lov_obd *lov, struct lov_mds_md *lmm,
225 int lov_free_memmd(struct lov_stripe_md **lsmp);
227 void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm);
228 void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm);
229 void lov_dump_lmm_common(int level, void *lmmp);
232 struct lov_stripe_md *lsm_alloc_plain(u16 stripe_count);
233 void lsm_free_plain(struct lov_stripe_md *lsm);
234 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm);
237 extern const struct file_operations lov_proc_target_fops;
238 void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars);
241 extern struct lu_device_type lov_device_type;
244 extern struct cfs_hash_ops pool_hash_operations;
245 /* ost_pool methods */
246 int lov_ost_pool_init(struct ost_pool *op, unsigned int count);
247 int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
248 int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
249 int lov_ost_pool_remove(struct ost_pool *op, __u32 idx);
250 int lov_ost_pool_free(struct ost_pool *op);
252 /* high level pool methods */
253 int lov_pool_new(struct obd_device *obd, char *poolname);
254 int lov_pool_del(struct obd_device *obd, char *poolname);
255 int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname);
256 int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
257 void lov_pool_putref(struct pool_desc *pool);
259 static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm)
261 LASSERT(atomic_read(&lsm->lsm_refc) > 0);
262 atomic_inc(&lsm->lsm_refc);
266 static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi)
268 if (unlikely(loi->loi_oi.oi.oi_id == 0 &&
269 loi->loi_oi.oi.oi_seq == 0 &&
270 loi->loi_ost_idx == 0 &&
271 loi->loi_ost_gen == 0))
277 static inline struct obd_device *lov2obd(const struct lov_obd *lov)
279 return container_of0(lov, struct obd_device, u.lov);