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36 * Implementation of cl_object 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 * Lovsub object operations.
55 int lovsub_object_init(const struct lu_env *env, struct lu_object *obj,
56 const struct lu_object_conf *conf)
58 struct lovsub_device *dev = lu2lovsub_dev(obj->lo_dev);
59 struct lu_object *below;
60 struct lu_device *under;
64 under = &dev->acid_next->cd_lu_dev;
65 below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
67 lu_object_add(obj, below);
68 cl_object_page_init(lu2cl(obj), sizeof(struct lovsub_page));
76 static void lovsub_object_free(const struct lu_env *env, struct lu_object *obj)
78 struct lovsub_object *los = lu2lovsub(obj);
79 struct lov_object *lov = los->lso_super;
81 /* We can't assume lov was assigned here, because of the shadow
82 * object handling in lu_object_find.
85 LASSERT(lov->lo_type == LLT_RAID0);
86 LASSERT(lov->u.raid0.lo_sub[los->lso_index] == los);
87 spin_lock(&lov->u.raid0.lo_sub_lock);
88 lov->u.raid0.lo_sub[los->lso_index] = NULL;
89 spin_unlock(&lov->u.raid0.lo_sub_lock);
93 lu_object_header_fini(&los->lso_header.coh_lu);
94 kmem_cache_free(lovsub_object_kmem, los);
97 static int lovsub_object_print(const struct lu_env *env, void *cookie,
98 lu_printer_t p, const struct lu_object *obj)
100 struct lovsub_object *los = lu2lovsub(obj);
102 return (*p)(env, cookie, "[%d]", los->lso_index);
105 static int lovsub_attr_set(const struct lu_env *env, struct cl_object *obj,
106 const struct cl_attr *attr, unsigned valid)
108 struct lov_object *lov = cl2lovsub(obj)->lso_super;
110 lov_r0(lov)->lo_attr_valid = 0;
114 static int lovsub_object_glimpse(const struct lu_env *env,
115 const struct cl_object *obj,
118 struct lovsub_object *los = cl2lovsub(obj);
120 return cl_object_glimpse(env, &los->lso_super->lo_cl, lvb);
123 static const struct cl_object_operations lovsub_ops = {
124 .coo_page_init = lovsub_page_init,
125 .coo_lock_init = lovsub_lock_init,
126 .coo_attr_set = lovsub_attr_set,
127 .coo_glimpse = lovsub_object_glimpse
130 static const struct lu_object_operations lovsub_lu_obj_ops = {
131 .loo_object_init = lovsub_object_init,
132 .loo_object_delete = NULL,
133 .loo_object_release = NULL,
134 .loo_object_free = lovsub_object_free,
135 .loo_object_print = lovsub_object_print,
136 .loo_object_invariant = NULL
139 struct lu_object *lovsub_object_alloc(const struct lu_env *env,
140 const struct lu_object_header *unused,
141 struct lu_device *dev)
143 struct lovsub_object *los;
144 struct lu_object *obj;
146 los = kmem_cache_zalloc(lovsub_object_kmem, GFP_NOFS);
148 struct cl_object_header *hdr;
150 obj = lovsub2lu(los);
151 hdr = &los->lso_header;
152 cl_object_header_init(hdr);
153 lu_object_init(obj, &hdr->coh_lu, dev);
154 lu_object_add_top(&hdr->coh_lu, obj);
155 los->lso_cl.co_ops = &lovsub_ops;
156 obj->lo_ops = &lovsub_lu_obj_ops;