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 OBD_SLAB_FREE_PTR(osc, osc_object_kmem);
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
151
osc_attr_get(const struct lu_env * env,struct cl_object * obj,struct cl_attr * attr)152 static int osc_attr_get(const struct lu_env *env, struct cl_object *obj,
153 struct cl_attr *attr)
154 {
155 struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
156
157 cl_lvb2attr(attr, &oinfo->loi_lvb);
158 attr->cat_kms = oinfo->loi_kms_valid ? oinfo->loi_kms : 0;
159 return 0;
160 }
161
osc_attr_set(const struct lu_env * env,struct cl_object * obj,const struct cl_attr * attr,unsigned valid)162 int osc_attr_set(const struct lu_env *env, struct cl_object *obj,
163 const struct cl_attr *attr, unsigned valid)
164 {
165 struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
166 struct ost_lvb *lvb = &oinfo->loi_lvb;
167
168 if (valid & CAT_SIZE)
169 lvb->lvb_size = attr->cat_size;
170 if (valid & CAT_MTIME)
171 lvb->lvb_mtime = attr->cat_mtime;
172 if (valid & CAT_ATIME)
173 lvb->lvb_atime = attr->cat_atime;
174 if (valid & CAT_CTIME)
175 lvb->lvb_ctime = attr->cat_ctime;
176 if (valid & CAT_BLOCKS)
177 lvb->lvb_blocks = attr->cat_blocks;
178 if (valid & CAT_KMS) {
179 CDEBUG(D_CACHE, "set kms from %llu to %llu\n",
180 oinfo->loi_kms, (__u64)attr->cat_kms);
181 loi_kms_set(oinfo, attr->cat_kms);
182 }
183 return 0;
184 }
185
osc_object_glimpse(const struct lu_env * env,const struct cl_object * obj,struct ost_lvb * lvb)186 static int osc_object_glimpse(const struct lu_env *env,
187 const struct cl_object *obj, struct ost_lvb *lvb)
188 {
189 struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
190
191 lvb->lvb_size = oinfo->loi_kms;
192 lvb->lvb_blocks = oinfo->loi_lvb.lvb_blocks;
193 return 0;
194 }
195
196
osc_object_set_contended(struct osc_object * obj)197 void osc_object_set_contended(struct osc_object *obj)
198 {
199 obj->oo_contention_time = cfs_time_current();
200 /* mb(); */
201 obj->oo_contended = 1;
202 }
203
osc_object_clear_contended(struct osc_object * obj)204 void osc_object_clear_contended(struct osc_object *obj)
205 {
206 obj->oo_contended = 0;
207 }
208
osc_object_is_contended(struct osc_object * obj)209 int osc_object_is_contended(struct osc_object *obj)
210 {
211 struct osc_device *dev = lu2osc_dev(obj->oo_cl.co_lu.lo_dev);
212 int osc_contention_time = dev->od_contention_time;
213 unsigned long cur_time = cfs_time_current();
214 unsigned long retry_time;
215
216 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_OBJECT_CONTENTION))
217 return 1;
218
219 if (!obj->oo_contended)
220 return 0;
221
222 /*
223 * I like copy-paste. the code is copied from
224 * ll_file_is_contended.
225 */
226 retry_time = cfs_time_add(obj->oo_contention_time,
227 cfs_time_seconds(osc_contention_time));
228 if (cfs_time_after(cur_time, retry_time)) {
229 osc_object_clear_contended(obj);
230 return 0;
231 }
232 return 1;
233 }
234
235 static const struct cl_object_operations osc_ops = {
236 .coo_page_init = osc_page_init,
237 .coo_lock_init = osc_lock_init,
238 .coo_io_init = osc_io_init,
239 .coo_attr_get = osc_attr_get,
240 .coo_attr_set = osc_attr_set,
241 .coo_glimpse = osc_object_glimpse
242 };
243
244 static const struct lu_object_operations osc_lu_obj_ops = {
245 .loo_object_init = osc_object_init,
246 .loo_object_delete = NULL,
247 .loo_object_release = NULL,
248 .loo_object_free = osc_object_free,
249 .loo_object_print = osc_object_print,
250 .loo_object_invariant = NULL
251 };
252
osc_object_alloc(const struct lu_env * env,const struct lu_object_header * unused,struct lu_device * dev)253 struct lu_object *osc_object_alloc(const struct lu_env *env,
254 const struct lu_object_header *unused,
255 struct lu_device *dev)
256 {
257 struct osc_object *osc;
258 struct lu_object *obj;
259
260 OBD_SLAB_ALLOC_PTR_GFP(osc, osc_object_kmem, GFP_NOFS);
261 if (osc != NULL) {
262 obj = osc2lu(osc);
263 lu_object_init(obj, NULL, dev);
264 osc->oo_cl.co_ops = &osc_ops;
265 obj->lo_ops = &osc_lu_obj_ops;
266 } else
267 obj = NULL;
268 return obj;
269 }
270
271 /** @} osc */
272