static int lovsub_object_glimpse(const struct lu_env *env,
const struct cl_object *obj,
struct ost_lvb *lvb)
{
struct lovsub_object *los = cl2lovsub(obj);
return cl_object_glimpse(env, &los->lso_super->lo_cl, lvb);
}
static int lovsub_attr_update(const struct lu_env *env, struct cl_object *obj,
const struct cl_attr *attr, unsigned int valid)
{
struct lov_object *lov = cl2lovsub(obj)->lso_super;
lov_r0(lov)->lo_attr_valid = 0;
return 0;
}
static int lovsub_attr_set(const struct lu_env *env, struct cl_object *obj,
const struct cl_attr *attr, unsigned valid)
{
struct lov_object *lov = cl2lovsub(obj)->lso_super;
ENTRY;
lov_r0(lov)->lo_attr_valid = 0;
RETURN(0);
}
/**
* Implementation of struct cl_req_operations::cro_attr_set() for lovsub
* layer. Lov and lovsub are responsible only for struct obdo::o_stripe_idx
* field, which is filled there.
*/
static void lovsub_req_attr_set(const struct lu_env *env,
const struct cl_req_slice *slice,
const struct cl_object *obj,
struct cl_req_attr *attr, obd_valid flags)
{
struct lovsub_object *subobj;
subobj = cl2lovsub(obj);
/*
* There is no OBD_MD_* flag for obdo::o_stripe_idx, so set it
* unconditionally. It never changes anyway.
*/
attr->cra_oa->o_stripe_idx = subobj->lso_index;
}
/**
* Implementation of struct cl_object_operations::coo_req_attr_set() for lovsub
* layer. Lov and lovsub are responsible only for struct obdo::o_stripe_idx
* field, which is filled there.
*/
static void lovsub_req_attr_set(const struct lu_env *env, struct cl_object *obj,
struct cl_req_attr *attr)
{
struct lovsub_object *subobj = cl2lovsub(obj);
ENTRY;
cl_req_attr_set(env, &subobj->lso_super->lo_cl, attr);
/*
* There is no OBD_MD_* flag for obdo::o_stripe_idx, so set it
* unconditionally. It never changes anyway.
*/
attr->cra_oa->o_stripe_idx = subobj->lso_index;
EXIT;
}
static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
struct cl_object *stripe, struct lov_layout_raid0 *r0,
int idx)
{
struct cl_object_header *hdr;
struct cl_object_header *subhdr;
struct cl_object_header *parent;
struct lov_oinfo *oinfo;
int result;
if (OBD_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
/* For sanity:test_206.
* Do not leave the object in cache to avoid accessing
* freed memory. This is because osc_object is referring to
* lov_oinfo of lsm_stripe_data which will be freed due to
* this failure. */
cl_object_kill(env, stripe);
cl_object_put(env, stripe);
return -EIO;
}
hdr = cl_object_header(lov2cl(lov));
subhdr = cl_object_header(stripe);
oinfo = lov->lo_lsm->lsm_oinfo[idx];
CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: ostid: "DOSTID
" idx: %d gen: %d\n",
PFID(&subhdr->coh_lu.loh_fid), subhdr, idx,
PFID(&hdr->coh_lu.loh_fid), hdr, POSTID(&oinfo->loi_oi),
oinfo->loi_ost_idx, oinfo->loi_ost_gen);
/* reuse ->coh_attr_guard to protect coh_parent change */
spin_lock(&subhdr->coh_attr_guard);
parent = subhdr->coh_parent;
if (parent == NULL) {
subhdr->coh_parent = hdr;
spin_unlock(&subhdr->coh_attr_guard);
subhdr->coh_nesting = hdr->coh_nesting + 1;
lu_object_ref_add(&stripe->co_lu, "lov-parent", lov);
r0->lo_sub[idx] = cl2lovsub(stripe);
r0->lo_sub[idx]->lso_super = lov;
r0->lo_sub[idx]->lso_index = idx;
result = 0;
} else {
struct lu_object *old_obj;
struct lov_object *old_lov;
unsigned int mask = D_INODE;
spin_unlock(&subhdr->coh_attr_guard);
old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
LASSERT(old_obj != NULL);
old_lov = cl2lov(lu2cl(old_obj));
if (old_lov->lo_layout_invalid) {
/* the object's layout has already changed but isn't
* refreshed */
lu_object_unhash(env, &stripe->co_lu);
result = -EAGAIN;
} else {
mask = D_ERROR;
result = -EIO;
}
LU_OBJECT_DEBUG(mask, env, &stripe->co_lu,
"stripe %d is already owned.\n", idx);
LU_OBJECT_DEBUG(mask, env, old_obj, "owned.\n");
LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
cl_object_put(env, stripe);
}
return result;
}