drivers/staging/lustre/lustre/osc/osc_object.c

   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, 2015, 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
  55 static struct lu_object *osc2lu(struct osc_object *osc)
  56 {
  57         return &osc->oo_cl.co_lu;
  58 }
  59
  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
  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
 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);
 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
 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
 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 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
 161 static 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
 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
 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
 202 void osc_object_clear_contended(struct osc_object *obj)
 203 {
 204         obj->oo_contended = 0;
 205 }
 206
 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
 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_zalloc(osc_object_kmem, GFP_NOFS);
 259         if (osc) {
 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 */