1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
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.
9 *
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).
15 *
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
19 *
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
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37 #ifndef LOV_INTERNAL_H
38 #define LOV_INTERNAL_H
39
40 #include "../include/obd_class.h"
41 #include "../include/lustre/lustre_user.h"
42
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); \
50 uint64_t __rem; \
51 __rem = ((uint64_t)(n)) % __base; \
52 (n) = ((uint64_t)(n)) / __base; \
53 __rem; \
54 })
55 #elif BITS_PER_LONG == 32
56 # define lov_do_div64(n, base) ({ \
57 uint64_t __rem; \
58 if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \
59 int __remainder; \
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; \
67 } else { \
68 __rem = do_div(n, base); \
69 } \
70 __rem; \
71 })
72 #endif
73
74 struct lov_request {
75 struct obd_info rq_oi;
76 struct lov_request_set *rq_rqset;
77
78 struct list_head rq_link;
79
80 int rq_idx; /* index in lov->tgts array */
81 int rq_stripe; /* stripe number */
82 int rq_complete;
83 int rq_rc;
84
85 u32 rq_oabufs;
86 u32 rq_pgaidx;
87 };
88
89 struct lov_request_set {
90 struct ldlm_enqueue_info *set_ei;
91 struct obd_info *set_oi;
92 atomic_t set_refcount;
93 struct obd_export *set_exp;
94 /* XXX: There is @set_exp already, however obd_statfs gets obd_device
95 only. */
96 struct obd_device *set_obd;
97 int set_count;
98 atomic_t set_completes;
99 atomic_t set_success;
100 atomic_t set_finish_checked;
101 struct llog_cookie *set_cookies;
102 int set_cookie_sent;
103 struct obd_trans_info *set_oti;
104 struct list_head set_list;
105 wait_queue_head_t set_waitq;
106 spinlock_t set_lock;
107 };
108
109 extern struct kmem_cache *lov_oinfo_slab;
110
111 extern struct lu_kmem_descr lov_caches[];
112
113 void lov_finish_set(struct lov_request_set *set);
114
lov_get_reqset(struct lov_request_set * set)115 static inline void lov_get_reqset(struct lov_request_set *set)
116 {
117 LASSERT(set != NULL);
118 LASSERT(atomic_read(&set->set_refcount) > 0);
119 atomic_inc(&set->set_refcount);
120 }
121
lov_put_reqset(struct lov_request_set * set)122 static inline void lov_put_reqset(struct lov_request_set *set)
123 {
124 if (atomic_dec_and_test(&set->set_refcount))
125 lov_finish_set(set);
126 }
127
128 #define lov_uuid2str(lv, index) \
129 (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid)
130
131 /* lov_merge.c */
132 void lov_merge_attrs(struct obdo *tgt, struct obdo *src, u64 valid,
133 struct lov_stripe_md *lsm, int stripeno, int *set);
134 int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
135 u64 size, int shrink);
136 int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
137 struct ost_lvb *lvb, __u64 *kms_place);
138
139 /* lov_offset.c */
140 u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size,
141 int stripeno);
142 int lov_stripe_offset(struct lov_stripe_md *lsm, u64 lov_off,
143 int stripeno, u64 *u64);
144 u64 lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size,
145 int stripeno);
146 int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno,
147 u64 start, u64 end,
148 u64 *obd_start, u64 *obd_end);
149 int lov_stripe_number(struct lov_stripe_md *lsm, u64 lov_off);
150
151 /* lov_qos.c */
152 #define LOV_USES_ASSIGNED_STRIPE 0
153 #define LOV_USES_DEFAULT_STRIPE 1
154 int qos_add_tgt(struct obd_device *obd, __u32 index);
155 int qos_del_tgt(struct obd_device *obd, struct lov_tgt_desc *tgt);
156 void qos_shrink_lsm(struct lov_request_set *set);
157 int qos_prep_create(struct obd_export *exp, struct lov_request_set *set);
158 void qos_update(struct lov_obd *lov);
159 void qos_statfs_done(struct lov_obd *lov);
160 void qos_statfs_update(struct obd_device *obd, __u64 max_age, int wait);
161 int qos_remedy_create(struct lov_request_set *set, struct lov_request *req);
162
163 /* lov_request.c */
164 void lov_set_add_req(struct lov_request *req, struct lov_request_set *set);
165 int lov_set_finished(struct lov_request_set *set, int idempotent);
166 void lov_update_set(struct lov_request_set *set,
167 struct lov_request *req, int rc);
168 int lov_update_common_set(struct lov_request_set *set,
169 struct lov_request *req, int rc);
170 int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx);
171 int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
172 struct lov_request_set **reqset);
173 int lov_fini_getattr_set(struct lov_request_set *set);
174 int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
175 struct obdo *src_oa, struct lov_stripe_md *lsm,
176 struct obd_trans_info *oti,
177 struct lov_request_set **reqset);
178 int lov_fini_destroy_set(struct lov_request_set *set);
179 int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
180 struct obd_trans_info *oti,
181 struct lov_request_set **reqset);
182 int lov_update_setattr_set(struct lov_request_set *set,
183 struct lov_request *req, int rc);
184 int lov_fini_setattr_set(struct lov_request_set *set);
185 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
186 struct lov_request_set **reqset);
187 void lov_update_statfs(struct obd_statfs *osfs, struct obd_statfs *lov_sfs,
188 int success);
189 int lov_fini_statfs(struct obd_device *obd, struct obd_statfs *osfs,
190 int success);
191 int lov_fini_statfs_set(struct lov_request_set *set);
192 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc);
193
194 /* lov_obd.c */
195 void lov_fix_desc(struct lov_desc *desc);
196 void lov_fix_desc_stripe_size(__u64 *val);
197 void lov_fix_desc_stripe_count(__u32 *val);
198 void lov_fix_desc_pattern(__u32 *val);
199 void lov_fix_desc_qos_maxage(__u32 *val);
200 __u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count);
201 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
202 struct obd_connect_data *data);
203 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
204 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
205 __u32 *indexp, int *genp);
206 int lov_del_target(struct obd_device *obd, __u32 index,
207 struct obd_uuid *uuidp, int gen);
208
209 /* lov_pack.c */
210 int lov_packmd(struct obd_export *exp, struct lov_mds_md **lmm,
211 struct lov_stripe_md *lsm);
212 int lov_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
213 struct lov_mds_md *lmm, int lmm_bytes);
214 int lov_getstripe(struct obd_export *exp,
215 struct lov_stripe_md *lsm, struct lov_user_md *lump);
216 int lov_alloc_memmd(struct lov_stripe_md **lsmp, __u16 stripe_count,
217 int pattern, int magic);
218 int lov_free_memmd(struct lov_stripe_md **lsmp);
219
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
224 /* lov_ea.c */
225 struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size);
226 void lsm_free_plain(struct lov_stripe_md *lsm);
227 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm);
228
229 /* lproc_lov.c */
230 extern const struct file_operations lov_proc_target_fops;
231 void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars);
232
233 /* lov_cl.c */
234 extern struct lu_device_type lov_device_type;
235
236 /* pools */
237 extern struct cfs_hash_ops pool_hash_operations;
238 /* ost_pool methods */
239 int lov_ost_pool_init(struct ost_pool *op, unsigned int count);
240 int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
241 int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
242 int lov_ost_pool_remove(struct ost_pool *op, __u32 idx);
243 int lov_ost_pool_free(struct ost_pool *op);
244
245 /* high level pool methods */
246 int lov_pool_new(struct obd_device *obd, char *poolname);
247 int lov_pool_del(struct obd_device *obd, char *poolname);
248 int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname);
249 int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
250 struct pool_desc *lov_find_pool(struct lov_obd *lov, char *poolname);
251 int lov_check_index_in_pool(__u32 idx, struct pool_desc *pool);
252 void lov_pool_putref(struct pool_desc *pool);
253
lsm_addref(struct lov_stripe_md * lsm)254 static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm)
255 {
256 LASSERT(atomic_read(&lsm->lsm_refc) > 0);
257 atomic_inc(&lsm->lsm_refc);
258 return lsm;
259 }
260
lov_oinfo_is_dummy(const struct lov_oinfo * loi)261 static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi)
262 {
263 if (unlikely(loi->loi_oi.oi.oi_id == 0 &&
264 loi->loi_oi.oi.oi_seq == 0 &&
265 loi->loi_ost_idx == 0 &&
266 loi->loi_ost_gen == 0))
267 return true;
268
269 return false;
270 }
271
272 #endif
273