int lov_read_and_clear_async_rc(struct cl_object *clob)
{
struct lu_object *luobj;
int rc = 0;
luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
&lov_device_type);
if (luobj != NULL) {
struct lov_object *lov = lu2lov(luobj);
lov_conf_freeze(lov);
switch (lov->lo_type) {
case LLT_RAID0: {
struct lov_stripe_md *lsm;
int i;
lsm = lov->lo_lsm;
LASSERT(lsm != NULL);
for (i = 0; i < lsm->lsm_stripe_count; i++) {
struct lov_oinfo *loi = lsm->lsm_oinfo[i];
if (loi->loi_ar.ar_rc && !rc)
rc = loi->loi_ar.ar_rc;
loi->loi_ar.ar_rc = 0;
}
}
case LLT_RELEASED:
case LLT_EMPTY:
break;
default:
LBUG();
}
lov_conf_thaw(lov);
}
return rc;
}
struct vvp_object *cl_inode2vvp(struct inode *inode)
{
struct ll_inode_info *lli = ll_i2info(inode);
struct cl_object *obj = lli->lli_clob;
struct lu_object *lu;
lu = lu_object_locate(obj->co_lu.lo_header, &vvp_device_type);
LASSERT(lu);
return lu2vvp(lu);
}
struct ccc_object *cl_inode2ccc(struct inode *inode)
{
struct cl_inode_info *lli = cl_i2info(inode);
struct cl_object *obj = lli->lli_clob;
struct lu_object *lu;
LASSERT(obj != NULL);
lu = lu_object_locate(obj->co_lu.lo_header, &vvp_device_type);
LASSERT(lu != NULL);
return lu2ccc(lu);
}
struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
{
struct lu_object *luobj;
struct lov_stripe_md *lsm = NULL;
if (clobj == NULL)
return NULL;
luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
&lov_device_type);
if (luobj != NULL)
lsm = lov_lsm_addref(lu2lov(luobj));
return lsm;
}
static struct dt_object *out_get_dt_obj(struct lu_object *obj)
{
struct mdt_device *mdt;
struct dt_device *dt;
struct lu_object *bottom_obj;
mdt = lu2mdt_dev(obj->lo_dev);
dt = mdt->mdt_bottom;
bottom_obj = lu_object_locate(obj->lo_header, dt->dd_lu_dev.ld_type);
if (bottom_obj == NULL)
return ERR_PTR(-ENOENT);
return lu2dt_obj(bottom_obj);
}
/**
* Find the osd object for given fid.
*
* \param fid need to find the osd object having this fid
*
* \retval osd_object on success
* \retval -ve on error
*/
struct osd_object *osd_object_find(const struct lu_env *env,
struct dt_object *dt,
const struct lu_fid *fid)
{
struct lu_device *ludev = dt->do_lu.lo_dev;
struct osd_object *child = NULL;
struct lu_object *luch;
struct lu_object *lo;
/*
* at this point topdev might not exist yet
* (i.e. MGS is preparing profiles). so we can
* not rely on topdev and instead lookup with
* our device passed as topdev. this can't work
* if the object isn't cached yet (as osd doesn't
* allocate lu_header). IOW, the object must be
* in the cache, otherwise lu_object_alloc() crashes
* -bzzz
*/
luch = lu_object_find_at(env, ludev, fid, NULL);
if (IS_ERR(luch))
return (void *)luch;
if (lu_object_exists(luch)) {
lo = lu_object_locate(luch->lo_header, ludev->ld_type);
if (lo != NULL)
child = osd_obj(lo);
else
LU_OBJECT_DEBUG(D_ERROR, env, luch,
"%s: object can't be located "DFID"\n",
osd_dev(ludev)->od_svname, PFID(fid));
if (child == NULL) {
lu_object_put(env, luch);
CERROR("%s: Unable to get osd_object "DFID"\n",
osd_dev(ludev)->od_svname, PFID(fid));
child = ERR_PTR(-ENOENT);
}
} else {
LU_OBJECT_DEBUG(D_ERROR, env, luch,
"%s: lu_object does not exists "DFID"\n",
osd_dev(ludev)->od_svname, PFID(fid));
lu_object_put(env, luch);
child = ERR_PTR(-ENOENT);
}
return child;
}
static struct md_object *mdo_locate(const struct lu_env *env,
struct md_device *md,
const struct lu_fid *fid)
{
struct lu_object *obj;
struct md_object *mdo;
obj = lu_object_find(env, &md->md_lu_dev, fid, NULL);
if (!IS_ERR(obj)) {
obj = lu_object_locate(obj->lo_header, md->md_lu_dev.ld_type);
LASSERT(obj != NULL);
mdo = lu2md(obj);
} else {
mdo = ERR_PTR(PTR_ERR(obj));
}
return mdo;
}
struct ofd_object *ofd_object_find_or_create(const struct lu_env *env,
struct ofd_device *ofd,
const struct lu_fid *fid,
struct lu_attr *attr)
{
struct ofd_thread_info *info = ofd_info(env);
struct lu_object *fo_obj;
struct dt_object *dto;
ENTRY;
info->fti_dof.dof_type = dt_mode_to_dft(S_IFREG);
dto = dt_find_or_create(env, ofd->ofd_osd, fid, &info->fti_dof, attr);
if (IS_ERR(dto))
RETURN(ERR_CAST(dto));
fo_obj = lu_object_locate(dto->do_lu.lo_header,
ofd->ofd_dt_dev.dd_lu_dev.ld_type);
RETURN(ofd_obj(fo_obj));
}
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;
}