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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;
65 under = &dev->acid_next->cd_lu_dev;
66 below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
68 lu_object_add(obj, below);
69 cl_object_page_init(lu2cl(obj), sizeof(struct lovsub_page));
77 static void lovsub_object_free(const struct lu_env *env, struct lu_object *obj)
79 struct lovsub_object *los = lu2lovsub(obj);
80 struct lov_object *lov = los->lso_super;
83 /* We can't assume lov was assigned here, because of the shadow
84 * object handling in lu_object_find.
87 LASSERT(lov->lo_type == LLT_RAID0);
88 LASSERT(lov->u.raid0.lo_sub[los->lso_index] == los);
89 spin_lock(&lov->u.raid0.lo_sub_lock);
90 lov->u.raid0.lo_sub[los->lso_index] = NULL;
91 spin_unlock(&lov->u.raid0.lo_sub_lock);
95 lu_object_header_fini(&los->lso_header.coh_lu);
96 OBD_SLAB_FREE_PTR(los, lovsub_object_kmem);
100 static int lovsub_object_print(const struct lu_env *env, void *cookie,
101 lu_printer_t p, const struct lu_object *obj)
103 struct lovsub_object *los = lu2lovsub(obj);
105 return (*p)(env, cookie, "[%d]", los->lso_index);
108 static int lovsub_attr_update(const struct lu_env *env, struct cl_object *obj,
109 const struct cl_attr *attr, unsigned valid)
111 struct lov_object *lov = cl2lovsub(obj)->lso_super;
114 lov_r0(lov)->lo_attr_valid = 0;
118 static int lovsub_object_glimpse(const struct lu_env *env,
119 const struct cl_object *obj,
122 struct lovsub_object *los = cl2lovsub(obj);
125 RETURN(cl_object_glimpse(env, &los->lso_super->lo_cl, lvb));
129 * Implementation of struct cl_object_operations::coo_req_attr_set() for lovsub
130 * layer. Lov and lovsub are responsible only for struct obdo::o_stripe_idx
131 * field, which is filled there.
133 static void lovsub_req_attr_set(const struct lu_env *env, struct cl_object *obj,
134 struct cl_req_attr *attr)
136 struct lovsub_object *subobj = cl2lovsub(obj);
139 cl_req_attr_set(env, &subobj->lso_super->lo_cl, attr);
142 * There is no OBD_MD_* flag for obdo::o_stripe_idx, so set it
143 * unconditionally. It never changes anyway.
145 attr->cra_oa->o_stripe_idx = subobj->lso_index;
149 static const struct cl_object_operations lovsub_ops = {
150 .coo_page_init = lovsub_page_init,
151 .coo_lock_init = lovsub_lock_init,
152 .coo_attr_update = lovsub_attr_update,
153 .coo_glimpse = lovsub_object_glimpse,
154 .coo_req_attr_set = lovsub_req_attr_set
157 static const struct lu_object_operations lovsub_lu_obj_ops = {
158 .loo_object_init = lovsub_object_init,
159 .loo_object_delete = NULL,
160 .loo_object_release = NULL,
161 .loo_object_free = lovsub_object_free,
162 .loo_object_print = lovsub_object_print,
163 .loo_object_invariant = NULL
166 struct lu_object *lovsub_object_alloc(const struct lu_env *env,
167 const struct lu_object_header *unused,
168 struct lu_device *dev)
170 struct lovsub_object *los;
171 struct lu_object *obj;
174 OBD_SLAB_ALLOC_PTR_GFP(los, lovsub_object_kmem, GFP_NOFS);
176 struct cl_object_header *hdr;
178 obj = lovsub2lu(los);
179 hdr = &los->lso_header;
180 cl_object_header_init(hdr);
181 lu_object_init(obj, &hdr->coh_lu, dev);
182 lu_object_add_top(&hdr->coh_lu, obj);
183 los->lso_cl.co_ops = &lovsub_ops;
184 obj->lo_ops = &lovsub_lu_obj_ops;