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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #ifndef LOV_INTERNAL_H
38 #define LOV_INTERNAL_H
40 #include <obd_class.h>
41 #include <lustre/lustre_user.h>
43 /* lov_do_div64(a, b) returns a % b, and a = a / b.
44 * The 32-bit code is LOV-specific due to knowing about stripe limits in
45 * order to reduce the divisor to a 32-bit number. If the divisor is
46 * already a 32-bit value the compiler handles this directly. */
47 #if BITS_PER_LONG == 64
48 # define lov_do_div64(n, base) ({ \
49 uint64_t __base = (base); \
51 __rem = ((uint64_t)(n)) % __base; \
52 (n) = ((uint64_t)(n)) / __base; \
55 #elif BITS_PER_LONG == 32
56 # define lov_do_div64(n, base) ({ \
58 if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \
60 LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov " \
61 "division %llu / %llu\n", (n), (uint64_t)(base)); \
62 __remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1); \
63 (n) >>= LOV_MIN_STRIPE_BITS; \
64 __rem = do_div(n, (base) >> LOV_MIN_STRIPE_BITS); \
65 __rem <<= LOV_MIN_STRIPE_BITS; \
66 __rem += __remainder; \
68 __rem = do_div(n, base); \
74 #define pool_tgt_size(p) ((p)->pool_obds.op_size)
75 #define pool_tgt_count(p) ((p)->pool_obds.op_count)
76 #define pool_tgt_array(p) ((p)->pool_obds.op_array)
77 #define pool_tgt_rw_sem(p) ((p)->pool_obds.op_rw_sem)
80 char pool_name[LOV_MAXPOOLNAME + 1];
81 struct ost_pool pool_obds;
82 atomic_t pool_refcount;
83 struct hlist_node pool_hash; /* access by poolname */
84 struct list_head pool_list; /* serial access */
85 struct proc_dir_entry *pool_proc_entry;
86 struct obd_device *pool_lobd; /* owner */
90 struct obd_info rq_oi;
91 struct lov_request_set *rq_rqset;
92 struct list_head rq_link;
93 int rq_idx; /* index in lov->tgts array */
94 int rq_stripe; /* stripe number */
99 struct lov_request_set {
100 struct obd_info *set_oi;
101 atomic_t set_refcount;
102 struct obd_export *set_exp;
103 /* XXX: There is @set_exp already, however obd_statfs gets
105 struct obd_device *set_obd;
107 atomic_t set_completes;
108 atomic_t set_success;
109 atomic_t set_finish_checked;
110 struct llog_cookie *set_cookies;
111 struct list_head set_list;
112 wait_queue_head_t set_waitq;
115 extern struct kmem_cache *lov_oinfo_slab;
117 void lov_finish_set(struct lov_request_set *set);
119 static inline void lov_put_reqset(struct lov_request_set *set)
121 if (atomic_dec_and_test(&set->set_refcount))
125 #define lov_uuid2str(lv, index) \
126 (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid)
129 void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_valid valid,
130 struct lov_stripe_md *lsm, int stripeno, int *set);
131 int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
132 struct ost_lvb *lvb, __u64 *kms_place);
135 obd_size lov_stripe_size(struct lov_stripe_md *lsm, obd_size ost_size,
137 int lov_stripe_offset(struct lov_stripe_md *lsm, obd_off lov_off,
138 int stripeno, obd_off *obd_off);
139 obd_off lov_size_to_stripe(struct lov_stripe_md *lsm, obd_off file_size,
141 int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno,
142 obd_off start, obd_off end,
143 obd_off *obd_start, obd_off *obd_end);
144 int lov_stripe_number(struct lov_stripe_md *lsm, obd_off lov_off);
145 pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, pgoff_t stripe_index,
149 void lov_set_add_req(struct lov_request *req, struct lov_request_set *set);
150 int lov_set_finished(struct lov_request_set *set, int idempotent);
151 void lov_update_set(struct lov_request_set *set,
152 struct lov_request *req, int rc);
153 int lov_update_common_set(struct lov_request_set *set,
154 struct lov_request *req, int rc);
155 int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx);
156 int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
157 struct lov_request_set **reqset);
158 int lov_fini_getattr_set(struct lov_request_set *set);
159 int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
160 struct obdo *src_oa, struct lov_stripe_md *lsm,
161 struct obd_trans_info *oti,
162 struct lov_request_set **reqset);
163 int lov_fini_destroy_set(struct lov_request_set *set);
164 int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
165 struct obd_trans_info *oti,
166 struct lov_request_set **reqset);
167 int lov_update_setattr_set(struct lov_request_set *set,
168 struct lov_request *req, int rc);
169 int lov_fini_setattr_set(struct lov_request_set *set);
170 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
171 struct lov_request_set **reqset);
172 void lov_update_statfs(struct obd_statfs *osfs, struct obd_statfs *lov_sfs,
174 int lov_fini_statfs(struct obd_device *obd, struct obd_statfs *osfs,
176 int lov_fini_statfs_set(struct lov_request_set *set);
177 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc);
180 void lov_stripe_lock(struct lov_stripe_md *md);
181 void lov_stripe_unlock(struct lov_stripe_md *md);
182 void lov_fix_desc(struct lov_desc *desc);
183 void lov_fix_desc_stripe_size(__u64 *val);
184 void lov_fix_desc_stripe_count(__u32 *val);
185 void lov_fix_desc_pattern(__u32 *val);
186 void lov_fix_desc_qos_maxage(__u32 *val);
187 __u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count);
188 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
189 struct obd_connect_data *data);
190 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
191 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
192 __u32 *indexp, int *genp);
193 int lov_del_target(struct obd_device *obd, __u32 index,
194 struct obd_uuid *uuidp, int gen);
197 int lov_packmd(struct obd_export *exp, struct lov_mds_md **lmm,
198 struct lov_stripe_md *lsm);
199 int lov_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
200 struct lov_mds_md *lmm, int lmm_bytes);
201 int lov_getstripe(struct obd_export *exp,
202 struct lov_stripe_md *lsm, struct lov_user_md __user *lump);
203 int lov_alloc_memmd(struct lov_stripe_md **lsmp, __u16 stripe_count,
204 int pattern, int magic);
205 int lov_free_memmd(struct lov_stripe_md **lsmp);
207 void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm);
208 void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm);
209 void lov_dump_lmm_common(int level, void *lmmp);
210 void lov_dump_lmm(int level, void *lmm);
213 struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size);
214 void lsm_free_plain(struct lov_stripe_md *lsm);
215 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm);
218 extern struct file_operations lov_proc_target_fops;
220 extern struct lprocfs_seq_vars lprocfs_lov_obd_vars[];
224 extern struct lu_device_type lov_device_type;
227 extern cfs_hash_ops_t pool_hash_operations;
228 /* ost_pool methods */
229 int lov_ost_pool_init(struct ost_pool *op, unsigned int count);
230 int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
231 int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
232 int lov_ost_pool_remove(struct ost_pool *op, __u32 idx);
233 int lov_ost_pool_free(struct ost_pool *op);
235 /* high level pool methods */
236 int lov_pool_new(struct obd_device *obd, char *poolname);
237 int lov_pool_del(struct obd_device *obd, char *poolname);
238 int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname);
239 int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
240 void lov_dump_pool(int level, struct pool_desc *pool);
241 void lov_pool_putref(struct pool_desc *pool);
243 static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm)
245 LASSERT(atomic_read(&lsm->lsm_refc) > 0);
246 atomic_inc(&lsm->lsm_refc);
250 static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi)
252 if (unlikely(loi->loi_oi.oi.oi_id == 0 &&
253 loi->loi_oi.oi.oi_seq == 0 &&
254 loi->loi_ost_idx == 0 &&
255 loi->loi_ost_gen == 0))