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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;
61 under = &dev->acid_next->cd_lu_dev;
62 below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
64 lu_object_add(obj, below);
65 cl_object_page_init(lu2cl(obj), 0);
73 static void lovsub_object_free(const struct lu_env *env, struct lu_object *obj)
75 struct lovsub_object *los = lu2lovsub(obj);
76 struct lov_object *lov = los->lso_super;
79 /* We can't assume lov was assigned here, because of the shadow
80 * object handling in lu_object_find.
83 int index = lov_comp_entry(los->lso_index);
84 int stripe = lov_comp_stripe(los->lso_index);
85 struct lov_layout_raid0 *r0 = lov_r0(lov, index);
87 LASSERT(lov->lo_type == LLT_COMP);
88 LASSERT(r0->lo_sub[stripe] == los);
89 spin_lock(&r0->lo_sub_lock);
90 r0->lo_sub[stripe] = NULL;
91 spin_unlock(&r0->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 lovsub_object *los = cl2lovsub(obj);
112 struct lov_object *lov = cl2lovsub(obj)->lso_super;
115 lov_r0(lov, lov_comp_entry(los->lso_index))->lo_attr_valid = 0;
119 static int lovsub_object_glimpse(const struct lu_env *env,
120 const struct cl_object *obj,
123 struct lovsub_object *los = cl2lovsub(obj);
126 RETURN(cl_object_glimpse(env, &los->lso_super->lo_cl, lvb));
130 * Implementation of struct cl_object_operations::coo_req_attr_set() for lovsub
131 * layer. Lov and lovsub are responsible only for struct obdo::o_stripe_idx
132 * field, which is filled there.
134 static void lovsub_req_attr_set(const struct lu_env *env, struct cl_object *obj,
135 struct cl_req_attr *attr)
137 struct lovsub_object *subobj = cl2lovsub(obj);
138 struct lov_stripe_md *lsm = subobj->lso_super->lo_lsm;
140 cl_req_attr_set(env, &subobj->lso_super->lo_cl, attr);
143 * There is no OBD_MD_* flag for obdo::o_stripe_idx, so set it
144 * unconditionally. It never changes anyway.
146 attr->cra_oa->o_stripe_idx = lov_comp_stripe(subobj->lso_index);
147 lov_lsm2layout(lsm, lsm->lsm_entries[lov_comp_entry(subobj->lso_index)],
148 &attr->cra_oa->o_layout);
149 attr->cra_oa->o_valid |= OBD_MD_FLOSTLAYOUT;
153 static const struct cl_object_operations lovsub_ops = {
154 .coo_attr_update = lovsub_attr_update,
155 .coo_glimpse = lovsub_object_glimpse,
156 .coo_req_attr_set = lovsub_req_attr_set
159 static const struct lu_object_operations lovsub_lu_obj_ops = {
160 .loo_object_init = lovsub_object_init,
161 .loo_object_delete = NULL,
162 .loo_object_release = NULL,
163 .loo_object_free = lovsub_object_free,
164 .loo_object_print = lovsub_object_print,
165 .loo_object_invariant = NULL
168 struct lu_object *lovsub_object_alloc(const struct lu_env *env,
169 const struct lu_object_header *unused,
170 struct lu_device *dev)
172 struct lovsub_object *los;
173 struct lu_object *obj;
176 OBD_SLAB_ALLOC_PTR_GFP(los, lovsub_object_kmem, GFP_NOFS);
178 struct cl_object_header *hdr;
180 obj = lovsub2lu(los);
181 hdr = &los->lso_header;
182 cl_object_header_init(hdr);
183 lu_object_init(obj, &hdr->coh_lu, dev);
184 lu_object_add_top(&hdr->coh_lu, obj);
185 los->lso_cl.co_ops = &lovsub_ops;
186 obj->lo_ops = &lovsub_lu_obj_ops;