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7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
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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).
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17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2013, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * Implementation of cl_device and cl_device_type for LOVSUB layer.
33 * Author: Nikita Danilov <nikita.danilov@sun.com>
36 #define DEBUG_SUBSYSTEM S_LOV
38 #include "lov_cl_internal.h"
45 * Lov-sub device and device type functions.
47 static int lovsub_device_init(const struct lu_env *env, struct lu_device *d,
48 const char *name, struct lu_device *next)
50 struct lovsub_device *lsd = lu2lovsub_dev(d);
51 struct lu_device_type *ldt;
55 next->ld_site = d->ld_site;
58 rc = ldt->ldt_ops->ldto_device_init(env, next, ldt->ldt_name, NULL);
65 lu_ref_add(&next->ld_reference, "lu-stack", &lu_site_init);
66 lsd->acid_next = lu2cl_dev(next);
70 static struct lu_device *lovsub_device_fini(const struct lu_env *env,
73 struct lu_device *next;
74 struct lovsub_device *lsd;
77 lsd = lu2lovsub_dev(d);
78 next = cl2lu_dev(lsd->acid_next);
79 lsd->acid_next = NULL;
83 static struct lu_device *lovsub_device_free(const struct lu_env *env,
86 struct lovsub_device *lsd = lu2lovsub_dev(d);
87 struct lu_device *next = cl2lu_dev(lsd->acid_next);
89 lu_site_print(env, d->ld_site, &d->ld_ref, D_ERROR, lu_cdebug_printer);
90 cl_device_fini(lu2cl_dev(d));
95 static const struct lu_device_operations lovsub_lu_ops = {
96 .ldo_object_alloc = lovsub_object_alloc,
97 .ldo_process_config = NULL,
98 .ldo_recovery_complete = NULL
101 static struct lu_device *lovsub_device_alloc(const struct lu_env *env,
102 struct lu_device_type *t,
103 struct lustre_cfg *cfg)
106 struct lovsub_device *lsd;
112 result = cl_device_init(&lsd->acid_cl, t);
114 d = lovsub2lu_dev(lsd);
115 d->ld_ops = &lovsub_lu_ops;
119 d = ERR_PTR(-ENOMEM);
123 static const struct lu_device_type_operations lovsub_device_type_ops = {
124 .ldto_device_alloc = lovsub_device_alloc,
125 .ldto_device_free = lovsub_device_free,
127 .ldto_device_init = lovsub_device_init,
128 .ldto_device_fini = lovsub_device_fini
131 #define LUSTRE_LOVSUB_NAME "lovsub"
133 struct lu_device_type lovsub_device_type = {
134 .ldt_tags = LU_DEVICE_CL,
135 .ldt_name = LUSTRE_LOVSUB_NAME,
136 .ldt_ops = &lovsub_device_type_ops,
137 .ldt_ctx_tags = LCT_CL_THREAD