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 <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 {
47 pid_t lsm_lock_owner; /* debugging */
49 /* maximum possible file size, might change as OSTs status changes,
50 * e.g. disconnected, deactivated */
55 u32 lsm_pattern; /* RAID0, RAID1, released, ... */
58 char lsm_pool_name[LOV_MAXPOOLNAME + 1];
59 struct lov_oinfo *lsm_oinfo[0];
62 static inline bool lsm_is_released(struct lov_stripe_md *lsm)
64 return !!(lsm->lsm_pattern & LOV_PATTERN_F_RELEASED);
67 static inline bool lsm_has_objects(struct lov_stripe_md *lsm)
72 if (lsm_is_released(lsm))
78 struct lsm_operations {
79 void (*lsm_free)(struct lov_stripe_md *);
80 void (*lsm_stripe_by_index)(struct lov_stripe_md *, int *, loff_t *,
82 void (*lsm_stripe_by_offset)(struct lov_stripe_md *, int *, loff_t *,
84 int (*lsm_lmm_verify)(struct lov_mds_md *lmm, int lmm_bytes,
86 int (*lsm_unpackmd)(struct lov_obd *lov, struct lov_stripe_md *lsm,
87 struct lov_mds_md *lmm);
90 extern const struct lsm_operations lsm_v1_ops;
91 extern const struct lsm_operations lsm_v3_ops;
92 static inline const struct lsm_operations *lsm_op_find(int magic)
100 CERROR("unrecognized lsm_magic %08x\n", magic);
105 /* lov_do_div64(a, b) returns a % b, and a = a / b.
106 * The 32-bit code is LOV-specific due to knowing about stripe limits in
107 * order to reduce the divisor to a 32-bit number. If the divisor is
108 * already a 32-bit value the compiler handles this directly. */
109 #if BITS_PER_LONG == 64
110 # define lov_do_div64(n, base) ({ \
111 uint64_t __base = (base); \
113 __rem = ((uint64_t)(n)) % __base; \
114 (n) = ((uint64_t)(n)) / __base; \
117 #elif BITS_PER_LONG == 32
118 # define lov_do_div64(n, base) ({ \
120 if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \
122 LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov " \
123 "division %llu / %llu\n", (n), (uint64_t)(base)); \
124 __remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1); \
125 (n) >>= LOV_MIN_STRIPE_BITS; \
126 __rem = do_div(n, (base) >> LOV_MIN_STRIPE_BITS); \
127 __rem <<= LOV_MIN_STRIPE_BITS; \
128 __rem += __remainder; \
130 __rem = do_div(n, base); \
136 #define pool_tgt_size(p) ((p)->pool_obds.op_size)
137 #define pool_tgt_count(p) ((p)->pool_obds.op_count)
138 #define pool_tgt_array(p) ((p)->pool_obds.op_array)
139 #define pool_tgt_rw_sem(p) ((p)->pool_obds.op_rw_sem)
142 char pool_name[LOV_MAXPOOLNAME + 1];
143 struct ost_pool pool_obds;
144 atomic_t pool_refcount;
145 struct hlist_node pool_hash; /* access by poolname */
146 struct list_head pool_list; /* serial access */
147 struct proc_dir_entry *pool_proc_entry;
148 struct obd_device *pool_lobd; /* owner */
152 struct obd_info rq_oi;
153 struct lov_request_set *rq_rqset;
154 struct list_head rq_link;
155 int rq_idx; /* index in lov->tgts array */
158 struct lov_request_set {
159 struct obd_info *set_oi;
160 struct obd_device *set_obd;
162 atomic_t set_completes;
163 atomic_t set_success;
164 struct list_head set_list;
167 extern struct kmem_cache *lov_oinfo_slab;
169 extern struct lu_kmem_descr lov_caches[];
171 #define lov_uuid2str(lv, index) \
172 (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid)
175 int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
176 struct ost_lvb *lvb, __u64 *kms_place);
179 u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size, int stripeno);
180 int lov_stripe_offset(struct lov_stripe_md *lsm, loff_t lov_off, int stripeno,
182 loff_t lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size,
184 int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno,
185 loff_t start, loff_t end,
186 loff_t *obd_start, loff_t *obd_end);
187 int lov_stripe_number(struct lov_stripe_md *lsm, loff_t lov_off);
188 pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, pgoff_t stripe_index,
192 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
193 struct lov_request_set **reqset);
194 int lov_fini_statfs_set(struct lov_request_set *set);
197 void lov_stripe_lock(struct lov_stripe_md *md);
198 void lov_stripe_unlock(struct lov_stripe_md *md);
199 void lov_fix_desc(struct lov_desc *desc);
200 void lov_fix_desc_stripe_size(__u64 *val);
201 void lov_fix_desc_stripe_count(__u32 *val);
202 void lov_fix_desc_pattern(__u32 *val);
203 void lov_fix_desc_qos_maxage(__u32 *val);
204 __u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count);
205 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
206 struct obd_connect_data *data);
207 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
208 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
209 __u32 *indexp, int *genp);
210 int lov_del_target(struct obd_device *obd, __u32 index,
211 struct obd_uuid *uuidp, int gen);
214 ssize_t lov_lsm_pack(const struct lov_stripe_md *lsm, void *buf,
216 struct lov_stripe_md *lov_unpackmd(struct lov_obd *lov, struct lov_mds_md *lmm,
218 int lov_free_memmd(struct lov_stripe_md **lsmp);
220 void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm);
221 void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm);
222 void lov_dump_lmm_common(int level, void *lmmp);
223 void lov_dump_lmm(int level, void *lmm);
226 struct lov_stripe_md *lsm_alloc_plain(u16 stripe_count);
227 void lsm_free_plain(struct lov_stripe_md *lsm);
228 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm);
231 extern struct file_operations lov_proc_target_fops;
232 #ifdef CONFIG_PROC_FS
233 extern struct lprocfs_vars lprocfs_lov_obd_vars[];
237 extern struct lu_device_type lov_device_type;
240 extern struct cfs_hash_ops pool_hash_operations;
241 /* ost_pool methods */
242 int lov_ost_pool_init(struct ost_pool *op, unsigned int count);
243 int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
244 int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
245 int lov_ost_pool_remove(struct ost_pool *op, __u32 idx);
246 int lov_ost_pool_free(struct ost_pool *op);
248 /* high level pool methods */
249 int lov_pool_new(struct obd_device *obd, char *poolname);
250 int lov_pool_del(struct obd_device *obd, char *poolname);
251 int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname);
252 int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
253 void lov_dump_pool(int level, struct pool_desc *pool);
255 static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm)
257 LASSERT(atomic_read(&lsm->lsm_refc) > 0);
258 atomic_inc(&lsm->lsm_refc);
262 static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi)
264 if (unlikely(loi->loi_oi.oi.oi_id == 0 &&
265 loi->loi_oi.oi.oi_seq == 0 &&
266 loi->loi_ost_idx == 0 &&
267 loi->loi_ost_gen == 0))
273 static inline struct obd_device *lov2obd(const struct lov_obd *lov)
275 return container_of0(lov, struct obd_device, u.lov);