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29 * This file is part of Lustre, http://www.lustre.org/
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32 * Implementation of cl_object for LOVSUB layer.
34 * Author: Nikita Danilov <nikita.danilov@sun.com>
37 #define DEBUG_SUBSYSTEM S_LOV
39 #include "lov_cl_internal.h"
45 /*****************************************************************************
47 * Lovsub object operations.
51 int lovsub_object_init(const struct lu_env *env, struct lu_object *obj,
52 const struct lu_object_conf *conf)
54 struct lovsub_device *dev = lu2lovsub_dev(obj->lo_dev);
55 struct lu_object *below;
56 struct lu_device *under;
60 under = &dev->acid_next->cd_lu_dev;
61 below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
63 lu_object_add(obj, below);
64 cl_object_page_init(lu2cl(obj), sizeof(struct lovsub_page));
72 static void lovsub_object_free(const struct lu_env *env, struct lu_object *obj)
74 struct lovsub_object *los = lu2lovsub(obj);
75 struct lov_object *lov = los->lso_super;
77 /* We can't assume lov was assigned here, because of the shadow
78 * object handling in lu_object_find.
81 LASSERT(lov->lo_type == LLT_RAID0);
82 LASSERT(lov->u.raid0.lo_sub[los->lso_index] == los);
83 spin_lock(&lov->u.raid0.lo_sub_lock);
84 lov->u.raid0.lo_sub[los->lso_index] = NULL;
85 spin_unlock(&lov->u.raid0.lo_sub_lock);
89 lu_object_header_fini(&los->lso_header.coh_lu);
90 kmem_cache_free(lovsub_object_kmem, los);
93 static int lovsub_object_print(const struct lu_env *env, void *cookie,
94 lu_printer_t p, const struct lu_object *obj)
96 struct lovsub_object *los = lu2lovsub(obj);
98 return (*p)(env, cookie, "[%d]", los->lso_index);
101 static int lovsub_attr_update(const struct lu_env *env, struct cl_object *obj,
102 const struct cl_attr *attr, unsigned int valid)
104 struct lov_object *lov = cl2lovsub(obj)->lso_super;
106 lov_r0(lov)->lo_attr_valid = 0;
110 static int lovsub_object_glimpse(const struct lu_env *env,
111 const struct cl_object *obj,
114 struct lovsub_object *los = cl2lovsub(obj);
116 return cl_object_glimpse(env, &los->lso_super->lo_cl, lvb);
119 static const struct cl_object_operations lovsub_ops = {
120 .coo_page_init = lovsub_page_init,
121 .coo_lock_init = lovsub_lock_init,
122 .coo_attr_update = lovsub_attr_update,
123 .coo_glimpse = lovsub_object_glimpse
126 static const struct lu_object_operations lovsub_lu_obj_ops = {
127 .loo_object_init = lovsub_object_init,
128 .loo_object_delete = NULL,
129 .loo_object_release = NULL,
130 .loo_object_free = lovsub_object_free,
131 .loo_object_print = lovsub_object_print,
132 .loo_object_invariant = NULL
135 struct lu_object *lovsub_object_alloc(const struct lu_env *env,
136 const struct lu_object_header *unused,
137 struct lu_device *dev)
139 struct lovsub_object *los;
140 struct lu_object *obj;
142 los = kmem_cache_zalloc(lovsub_object_kmem, GFP_NOFS);
144 struct cl_object_header *hdr;
146 obj = lovsub2lu(los);
147 hdr = &los->lso_header;
148 cl_object_header_init(hdr);
149 lu_object_init(obj, &hdr->coh_lu, dev);
150 lu_object_add_top(&hdr->coh_lu, obj);
151 los->lso_cl.co_ops = &lovsub_ops;
152 obj->lo_ops = &lovsub_lu_obj_ops;