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) 2008, 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 * Implementation of cl_object for OSC layer.
37 *
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
39 */
40
41 #define DEBUG_SUBSYSTEM S_OSC
42
43 #include "osc_cl_internal.h"
44
45 /** \addtogroup osc
46 * @{
47 */
48
49 /*****************************************************************************
50 *
51 * Type conversions.
52 *
53 */
54
osc2lu(struct osc_object * osc)55 static struct lu_object *osc2lu(struct osc_object *osc)
56 {
57 return &osc->oo_cl.co_lu;
58 }
59
lu2osc(const struct lu_object * obj)60 static struct osc_object *lu2osc(const struct lu_object *obj)
61 {
62 LINVRNT(osc_is_object(obj));
63 return container_of0(obj, struct osc_object, oo_cl.co_lu);
64 }
65
66 /*****************************************************************************
67 *
68 * Object operations.
69 *
70 */
71
osc_object_init(const struct lu_env * env,struct lu_object * obj,const struct lu_object_conf * conf)72 static int osc_object_init(const struct lu_env *env, struct lu_object *obj,
73 const struct lu_object_conf *conf)
74 {
75 struct osc_object *osc = lu2osc(obj);
76 const struct cl_object_conf *cconf = lu2cl_conf(conf);
77 int i;
78
79 osc->oo_oinfo = cconf->u.coc_oinfo;
80 spin_lock_init(&osc->oo_seatbelt);
81 for (i = 0; i < CRT_NR; ++i)
82 INIT_LIST_HEAD(&osc->oo_inflight[i]);
83
84 INIT_LIST_HEAD(&osc->oo_ready_item);
85 INIT_LIST_HEAD(&osc->oo_hp_ready_item);
86 INIT_LIST_HEAD(&osc->oo_write_item);
87 INIT_LIST_HEAD(&osc->oo_read_item);
88
89 osc->oo_root.rb_node = NULL;
90 INIT_LIST_HEAD(&osc->oo_hp_exts);
91 INIT_LIST_HEAD(&osc->oo_urgent_exts);
92 INIT_LIST_HEAD(&osc->oo_rpc_exts);
93 INIT_LIST_HEAD(&osc->oo_reading_exts);
94 atomic_set(&osc->oo_nr_reads, 0);
95 atomic_set(&osc->oo_nr_writes, 0);
96 spin_lock_init(&osc->oo_lock);
97
98 cl_object_page_init(lu2cl(obj), sizeof(struct osc_page));
99
100 return 0;
101 }
102
osc_object_free(const struct lu_env * env,struct lu_object * obj)103 static void osc_object_free(const struct lu_env *env, struct lu_object *obj)
104 {
105 struct osc_object *osc = lu2osc(obj);
106 int i;
107
108 for (i = 0; i < CRT_NR; ++i)
109 LASSERT(list_empty(&osc->oo_inflight[i]));
110
111 LASSERT(list_empty(&osc->oo_ready_item));
112 LASSERT(list_empty(&osc->oo_hp_ready_item));
113 LASSERT(list_empty(&osc->oo_write_item));
114 LASSERT(list_empty(&osc->oo_read_item));
115
116 LASSERT(osc->oo_root.rb_node == NULL);
117 LASSERT(list_empty(&osc->oo_hp_exts));
118 LASSERT(list_empty(&osc->oo_urgent_exts));
119 LASSERT(list_empty(&osc->oo_rpc_exts));
120 LASSERT(list_empty(&osc->oo_reading_exts));
121 LASSERT(atomic_read(&osc->oo_nr_reads) == 0);
122 LASSERT(atomic_read(&osc->oo_nr_writes) == 0);
123
124 lu_object_fini(obj);
125 kmem_cache_free(osc_object_kmem, osc);
126 }
127
osc_lvb_print(const struct lu_env * env,void * cookie,lu_printer_t p,const struct ost_lvb * lvb)128 int osc_lvb_print(const struct lu_env *env, void *cookie,
129 lu_printer_t p, const struct ost_lvb *lvb)
130 {
131 return (*p)(env, cookie, "size: %llu mtime: %llu atime: %llu ctime: %llu blocks: %llu",
132 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
133 lvb->lvb_ctime, lvb->lvb_blocks);
134 }
135
osc_object_print(const struct lu_env * env,void * cookie,lu_printer_t p,const struct lu_object * obj)136 static int osc_object_print(const struct lu_env *env, void *cookie,
137 lu_printer_t p, const struct lu_object *obj)
138 {
139 struct osc_object *osc = lu2osc(obj);
140 struct lov_oinfo *oinfo = osc->oo_oinfo;
141 struct osc_async_rc *ar = &oinfo->loi_ar;
142
143 (*p)(env, cookie, "id: " DOSTID " idx: %d gen: %d kms_valid: %u kms %llu rc: %d force_sync: %d min_xid: %llu ",
144 POSTID(&oinfo->loi_oi), oinfo->loi_ost_idx,
145 oinfo->loi_ost_gen, oinfo->loi_kms_valid, oinfo->loi_kms,
146 ar->ar_rc, ar->ar_force_sync, ar->ar_min_xid);
147 osc_lvb_print(env, cookie, p, &oinfo->loi_lvb);
148 return 0;
149 }
150
osc_attr_get(const struct lu_env * env,struct cl_object * obj,struct cl_attr * attr)151 static int osc_attr_get(const struct lu_env *env, struct cl_object *obj,
152 struct cl_attr *attr)
153 {
154 struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
155
156 cl_lvb2attr(attr, &oinfo->loi_lvb);
157 attr->cat_kms = oinfo->loi_kms_valid ? oinfo->loi_kms : 0;
158 return 0;
159 }
160
osc_attr_set(const struct lu_env * env,struct cl_object * obj,const struct cl_attr * attr,unsigned valid)161 int osc_attr_set(const struct lu_env *env, struct cl_object *obj,
162 const struct cl_attr *attr, unsigned valid)
163 {
164 struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
165 struct ost_lvb *lvb = &oinfo->loi_lvb;
166
167 if (valid & CAT_SIZE)
168 lvb->lvb_size = attr->cat_size;
169 if (valid & CAT_MTIME)
170 lvb->lvb_mtime = attr->cat_mtime;
171 if (valid & CAT_ATIME)
172 lvb->lvb_atime = attr->cat_atime;
173 if (valid & CAT_CTIME)
174 lvb->lvb_ctime = attr->cat_ctime;
175 if (valid & CAT_BLOCKS)
176 lvb->lvb_blocks = attr->cat_blocks;
177 if (valid & CAT_KMS) {
178 CDEBUG(D_CACHE, "set kms from %llu to %llu\n",
179 oinfo->loi_kms, (__u64)attr->cat_kms);
180 loi_kms_set(oinfo, attr->cat_kms);
181 }
182 return 0;
183 }
184
osc_object_glimpse(const struct lu_env * env,const struct cl_object * obj,struct ost_lvb * lvb)185 static int osc_object_glimpse(const struct lu_env *env,
186 const struct cl_object *obj, struct ost_lvb *lvb)
187 {
188 struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
189
190 lvb->lvb_size = oinfo->loi_kms;
191 lvb->lvb_blocks = oinfo->loi_lvb.lvb_blocks;
192 return 0;
193 }
194
osc_object_set_contended(struct osc_object * obj)195 void osc_object_set_contended(struct osc_object *obj)
196 {
197 obj->oo_contention_time = cfs_time_current();
198 /* mb(); */
199 obj->oo_contended = 1;
200 }
201
osc_object_clear_contended(struct osc_object * obj)202 void osc_object_clear_contended(struct osc_object *obj)
203 {
204 obj->oo_contended = 0;
205 }
206
osc_object_is_contended(struct osc_object * obj)207 int osc_object_is_contended(struct osc_object *obj)
208 {
209 struct osc_device *dev = lu2osc_dev(obj->oo_cl.co_lu.lo_dev);
210 int osc_contention_time = dev->od_contention_time;
211 unsigned long cur_time = cfs_time_current();
212 unsigned long retry_time;
213
214 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_OBJECT_CONTENTION))
215 return 1;
216
217 if (!obj->oo_contended)
218 return 0;
219
220 /*
221 * I like copy-paste. the code is copied from
222 * ll_file_is_contended.
223 */
224 retry_time = cfs_time_add(obj->oo_contention_time,
225 cfs_time_seconds(osc_contention_time));
226 if (cfs_time_after(cur_time, retry_time)) {
227 osc_object_clear_contended(obj);
228 return 0;
229 }
230 return 1;
231 }
232
233 static const struct cl_object_operations osc_ops = {
234 .coo_page_init = osc_page_init,
235 .coo_lock_init = osc_lock_init,
236 .coo_io_init = osc_io_init,
237 .coo_attr_get = osc_attr_get,
238 .coo_attr_set = osc_attr_set,
239 .coo_glimpse = osc_object_glimpse
240 };
241
242 static const struct lu_object_operations osc_lu_obj_ops = {
243 .loo_object_init = osc_object_init,
244 .loo_object_delete = NULL,
245 .loo_object_release = NULL,
246 .loo_object_free = osc_object_free,
247 .loo_object_print = osc_object_print,
248 .loo_object_invariant = NULL
249 };
250
osc_object_alloc(const struct lu_env * env,const struct lu_object_header * unused,struct lu_device * dev)251 struct lu_object *osc_object_alloc(const struct lu_env *env,
252 const struct lu_object_header *unused,
253 struct lu_device *dev)
254 {
255 struct osc_object *osc;
256 struct lu_object *obj;
257
258 osc = kmem_cache_alloc(osc_object_kmem, GFP_NOFS | __GFP_ZERO);
259 if (osc != NULL) {
260 obj = osc2lu(osc);
261 lu_object_init(obj, NULL, dev);
262 osc->oo_cl.co_ops = &osc_ops;
263 obj->lo_ops = &osc_lu_obj_ops;
264 } else
265 obj = NULL;
266 return obj;
267 }
268
269 /** @} osc */
270