static struct cl_object *lov_find_subobj(const struct lu_env *env,
struct lov_object *lov,
struct lov_stripe_md *lsm,
int stripe_idx)
{
struct lov_device *dev = lu2lov_dev(lov2lu(lov)->lo_dev);
struct lov_oinfo *oinfo = lsm->lsm_oinfo[stripe_idx];
struct lov_thread_info *lti = lov_env_info(env);
struct lu_fid *ofid = <i->lti_fid;
struct cl_device *subdev;
int ost_idx;
int rc;
struct cl_object *result;
if (lov->lo_type != LLT_RAID0)
GOTO(out, result = NULL);
ost_idx = oinfo->loi_ost_idx;
rc = ostid_to_fid(ofid, &oinfo->loi_oi, ost_idx);
if (rc != 0)
GOTO(out, result = NULL);
subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
result = lov_sub_find(env, subdev, ofid, NULL);
out:
if (result == NULL)
result = ERR_PTR(-EINVAL);
return result;
}
static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
const struct cl_object_conf *conf)
{
struct lov_stripe_md *lsm = NULL;
struct lov_object *lov = cl2lov(obj);
int result = 0;
lov_conf_lock(lov);
if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
lov->lo_layout_invalid = true;
result = 0;
goto out;
}
if (conf->coc_opc == OBJECT_CONF_WAIT) {
if (lov->lo_layout_invalid &&
atomic_read(&lov->lo_active_ios) > 0) {
lov_conf_unlock(lov);
result = lov_layout_wait(env, lov);
lov_conf_lock(lov);
}
goto out;
}
LASSERT(conf->coc_opc == OBJECT_CONF_SET);
if (conf->u.coc_md)
lsm = conf->u.coc_md->lsm;
if ((!lsm && !lov->lo_lsm) ||
((lsm && lov->lo_lsm) &&
(lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
(lov->lo_lsm->lsm_pattern == lsm->lsm_pattern))) {
/* same version of layout */
lov->lo_layout_invalid = false;
result = 0;
goto out;
}
/* will change layout - check if there still exists active IO. */
if (atomic_read(&lov->lo_active_ios) > 0) {
lov->lo_layout_invalid = true;
result = -EBUSY;
goto out;
}
result = lov_layout_change(env, lov, conf);
lov->lo_layout_invalid = result != 0;
out:
lov_conf_unlock(lov);
CDEBUG(D_INODE, DFID" lo_layout_invalid=%d\n",
PFID(lu_object_fid(lov2lu(lov))), lov->lo_layout_invalid);
return result;
}
static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
{
struct l_wait_info lwi = { 0 };
while (atomic_read(&lov->lo_active_ios) > 0) {
CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
PFID(lu_object_fid(lov2lu(lov))),
atomic_read(&lov->lo_active_ios));
l_wait_event(lov->lo_waitq,
atomic_read(&lov->lo_active_ios) == 0, &lwi);
}
return 0;
}
struct lu_object *lov_object_alloc(const struct lu_env *env,
const struct lu_object_header *unused,
struct lu_device *dev)
{
struct lov_object *lov;
struct lu_object *obj;
OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, GFP_NOFS);
if (lov != NULL) {
obj = lov2lu(lov);
lu_object_init(obj, NULL, dev);
lov->lo_cl.co_ops = &lov_ops;
lov->lo_type = -1; /* invalid, to catch uninitialized type */
/*
* object io operation vector (cl_object::co_iop) is installed
* later in lov_object_init(), as different vectors are used
* for object with different layouts.
*/
obj->lo_ops = &lov_lu_obj_ops;
} else
obj = NULL;
return obj;
}
static int lov_layout_change(const struct lu_env *unused,
struct lov_object *lov,
const struct cl_object_conf *conf)
{
int result;
enum lov_layout_type llt = LLT_EMPTY;
union lov_layout_state *state = &lov->u;
const struct lov_layout_operations *old_ops;
const struct lov_layout_operations *new_ops;
struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
void *cookie;
struct lu_env *env;
int refcheck;
LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
if (conf->u.coc_md != NULL)
llt = lov_type(conf->u.coc_md->lsm);
LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
cookie = cl_env_reenter();
env = cl_env_get(&refcheck);
if (IS_ERR(env)) {
cl_env_reexit(cookie);
return PTR_ERR(env);
}
CDEBUG(D_INODE, DFID" from %s to %s\n",
PFID(lu_object_fid(lov2lu(lov))),
llt2str(lov->lo_type), llt2str(llt));
old_ops = &lov_dispatch[lov->lo_type];
new_ops = &lov_dispatch[llt];
result = old_ops->llo_delete(env, lov, &lov->u);
if (result == 0) {
old_ops->llo_fini(env, lov, &lov->u);
LASSERT(atomic_read(&lov->lo_active_ios) == 0);
LASSERT(hdr->coh_tree.rnode == NULL);
LASSERT(hdr->coh_pages == 0);
lov->lo_type = LLT_EMPTY;
result = new_ops->llo_init(env,
lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
lov, conf, state);
if (result == 0) {
new_ops->llo_install(env, lov, state);
lov->lo_type = llt;
} else {
new_ops->llo_delete(env, lov, state);
new_ops->llo_fini(env, lov, state);
/* this file becomes an EMPTY file. */
}
}
cl_env_put(env, &refcheck);
cl_env_reexit(cookie);
return result;
}
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;
}
static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
const struct cl_object_conf *conf)
{
struct lov_stripe_md *lsm = NULL;
struct lov_object *lov = cl2lov(obj);
int result = 0;
ENTRY;
if (conf->coc_opc == OBJECT_CONF_SET &&
conf->u.coc_layout.lb_buf != NULL) {
lsm = lov_unpackmd(lov_object_dev(lov)->ld_lov,
conf->u.coc_layout.lb_buf,
conf->u.coc_layout.lb_len);
if (IS_ERR(lsm))
RETURN(PTR_ERR(lsm));
}
lov_conf_lock(lov);
if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
lov->lo_layout_invalid = true;
GOTO(out, result = 0);
}
if (conf->coc_opc == OBJECT_CONF_WAIT) {
if (lov->lo_layout_invalid &&
atomic_read(&lov->lo_active_ios) > 0) {
lov_conf_unlock(lov);
result = lov_layout_wait(env, lov);
lov_conf_lock(lov);
}
GOTO(out, result);
}
LASSERT(conf->coc_opc == OBJECT_CONF_SET);
if ((lsm == NULL && lov->lo_lsm == NULL) ||
((lsm != NULL && lov->lo_lsm != NULL) &&
(lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
(lov->lo_lsm->lsm_pattern == lsm->lsm_pattern))) {
/* same version of layout */
lov->lo_layout_invalid = false;
GOTO(out, result = 0);
}
/* will change layout - check if there still exists active IO. */
if (atomic_read(&lov->lo_active_ios) > 0) {
lov->lo_layout_invalid = true;
GOTO(out, result = -EBUSY);
}
result = lov_layout_change(env, lov, lsm, conf);
lov->lo_layout_invalid = result != 0;
EXIT;
out:
lov_conf_unlock(lov);
lov_lsm_put(lsm);
CDEBUG(D_INODE, DFID" lo_layout_invalid=%d\n",
PFID(lu_object_fid(lov2lu(lov))), lov->lo_layout_invalid);
RETURN(result);
}
static int lov_layout_change(const struct lu_env *unused,
struct lov_object *lov, struct lov_stripe_md *lsm,
const struct cl_object_conf *conf)
{
enum lov_layout_type llt = lov_type(lsm);
union lov_layout_state *state = &lov->u;
const struct lov_layout_operations *old_ops;
const struct lov_layout_operations *new_ops;
void *cookie;
struct lu_env *env;
__u16 refcheck;
int rc;
ENTRY;
LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
cookie = cl_env_reenter();
env = cl_env_get(&refcheck);
if (IS_ERR(env)) {
cl_env_reexit(cookie);
RETURN(PTR_ERR(env));
}
LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
CDEBUG(D_INODE, DFID" from %s to %s\n",
PFID(lu_object_fid(lov2lu(lov))),
llt2str(lov->lo_type), llt2str(llt));
old_ops = &lov_dispatch[lov->lo_type];
new_ops = &lov_dispatch[llt];
rc = cl_object_prune(env, &lov->lo_cl);
if (rc != 0)
GOTO(out, rc);
rc = old_ops->llo_delete(env, lov, &lov->u);
if (rc != 0)
GOTO(out, rc);
old_ops->llo_fini(env, lov, &lov->u);
LASSERT(atomic_read(&lov->lo_active_ios) == 0);
lov->lo_type = LLT_EMPTY;
/* page bufsize fixup */
cl_object_header(&lov->lo_cl)->coh_page_bufsize -=
lov_page_slice_fixup(lov, NULL);
rc = new_ops->llo_init(env, lov_object_dev(lov), lov, lsm, conf, state);
if (rc != 0) {
new_ops->llo_delete(env, lov, state);
new_ops->llo_fini(env, lov, state);
/* this file becomes an EMPTY file. */
GOTO(out, rc);
}
new_ops->llo_install(env, lov, state);
lov->lo_type = llt;
out:
cl_env_put(env, &refcheck);
cl_env_reexit(cookie);
RETURN(rc);
}
