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27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Implementation of cl_device and cl_device_type for LOVSUB layer.
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
41 #define DEBUG_SUBSYSTEM S_LOV
43 #include "lov_cl_internal.h"
49 /*****************************************************************************
51 * Lov-sub device and device type functions.
55 static int lovsub_device_init(const struct lu_env *env, struct lu_device *d,
56 const char *name, struct lu_device *next)
58 struct lovsub_device *lsd = lu2lovsub_dev(d);
59 struct lu_device_type *ldt;
63 next->ld_site = d->ld_site;
66 rc = ldt->ldt_ops->ldto_device_init(env, next, ldt->ldt_name, NULL);
73 lu_ref_add(&next->ld_reference, "lu-stack", &lu_site_init);
74 lsd->acid_next = lu2cl_dev(next);
78 static struct lu_device *lovsub_device_fini(const struct lu_env *env,
81 struct lu_device *next;
82 struct lovsub_device *lsd;
85 lsd = lu2lovsub_dev(d);
86 next = cl2lu_dev(lsd->acid_next);
87 lsd->acid_super = NULL;
88 lsd->acid_next = NULL;
92 static struct lu_device *lovsub_device_free(const struct lu_env *env,
95 struct lovsub_device *lsd = lu2lovsub_dev(d);
96 struct lu_device *next = cl2lu_dev(lsd->acid_next);
98 if (atomic_read(&d->ld_ref) && d->ld_site) {
99 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
100 lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
102 cl_device_fini(lu2cl_dev(d));
107 static const struct lu_device_operations lovsub_lu_ops = {
108 .ldo_object_alloc = lovsub_object_alloc,
109 .ldo_process_config = NULL,
110 .ldo_recovery_complete = NULL
113 static struct lu_device *lovsub_device_alloc(const struct lu_env *env,
114 struct lu_device_type *t,
115 struct lustre_cfg *cfg)
118 struct lovsub_device *lsd;
124 result = cl_device_init(&lsd->acid_cl, t);
126 d = lovsub2lu_dev(lsd);
127 d->ld_ops = &lovsub_lu_ops;
131 d = ERR_PTR(-ENOMEM);
135 static const struct lu_device_type_operations lovsub_device_type_ops = {
136 .ldto_device_alloc = lovsub_device_alloc,
137 .ldto_device_free = lovsub_device_free,
139 .ldto_device_init = lovsub_device_init,
140 .ldto_device_fini = lovsub_device_fini
143 #define LUSTRE_LOVSUB_NAME "lovsub"
145 struct lu_device_type lovsub_device_type = {
146 .ldt_tags = LU_DEVICE_CL,
147 .ldt_name = LUSTRE_LOVSUB_NAME,
148 .ldt_ops = &lovsub_device_type_ops,
149 .ldt_ctx_tags = LCT_CL_THREAD