int __llog_ctxt_put(const struct lu_env *env, struct llog_ctxt *ctxt)
{
struct obd_llog_group *olg = ctxt->loc_olg;
struct obd_device *obd;
int rc = 0;
spin_lock(&olg->olg_lock);
if (!atomic_dec_and_test(&ctxt->loc_refcount)) {
spin_unlock(&olg->olg_lock);
return rc;
}
olg->olg_ctxts[ctxt->loc_idx] = NULL;
spin_unlock(&olg->olg_lock);
obd = ctxt->loc_obd;
spin_lock(&obd->obd_dev_lock);
/* sync with llog ctxt user thread */
spin_unlock(&obd->obd_dev_lock);
/* obd->obd_starting is needed for the case of cleanup
* in error case while obd is starting up. */
LASSERTF(obd->obd_starting == 1 ||
obd->obd_stopping == 1 || obd->obd_set_up == 0,
"wrong obd state: %d/%d/%d\n", !!obd->obd_starting,
!!obd->obd_stopping, !!obd->obd_set_up);
/* cleanup the llog ctxt here */
if (CTXTP(ctxt, cleanup))
rc = CTXTP(ctxt, cleanup)(env, ctxt);
llog_ctxt_destroy(ctxt);
wake_up(&olg->olg_waitq);
return rc;
}
int llog_setup(const struct lu_env *env, struct obd_device *obd,
struct obd_llog_group *olg, int index,
struct obd_device *disk_obd, struct llog_operations *op)
{
struct llog_ctxt *ctxt;
int rc = 0;
if (index < 0 || index >= LLOG_MAX_CTXTS)
return -EINVAL;
LASSERT(olg != NULL);
ctxt = llog_new_ctxt(obd);
if (!ctxt)
return -ENOMEM;
ctxt->loc_obd = obd;
ctxt->loc_olg = olg;
ctxt->loc_idx = index;
ctxt->loc_logops = op;
mutex_init(&ctxt->loc_mutex);
ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
ctxt->loc_flags = LLOG_CTXT_FLAG_UNINITIALIZED;
rc = llog_group_set_ctxt(olg, ctxt, index);
if (rc) {
llog_ctxt_destroy(ctxt);
if (rc == -EEXIST) {
ctxt = llog_group_get_ctxt(olg, index);
if (ctxt) {
/*
* mds_lov_update_desc() might call here multiple
* times. So if the llog is already set up then
* don't to do it again.
*/
CDEBUG(D_CONFIG, "obd %s ctxt %d already set up\n",
obd->obd_name, index);
LASSERT(ctxt->loc_olg == olg);
LASSERT(ctxt->loc_obd == obd);
LASSERT(ctxt->loc_exp == disk_obd->obd_self_export);
LASSERT(ctxt->loc_logops == op);
llog_ctxt_put(ctxt);
}
rc = 0;
}
return rc;
}
if (op->lop_setup) {
if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LLOG_SETUP))
rc = -EOPNOTSUPP;
else
rc = op->lop_setup(env, obd, olg, index, disk_obd);
}
if (rc) {
CERROR("%s: ctxt %d lop_setup=%p failed: rc = %d\n",
obd->obd_name, index, op->lop_setup, rc);
llog_group_clear_ctxt(olg, index);
llog_ctxt_destroy(ctxt);
} else {
CDEBUG(D_CONFIG, "obd %s ctxt %d is initialized\n",
obd->obd_name, index);
ctxt->loc_flags &= ~LLOG_CTXT_FLAG_UNINITIALIZED;
}
return rc;
}
int llog_setup(const struct lu_env *env, struct obd_device *obd,
struct obd_llog_group *olg, int index,
struct obd_device *disk_obd, struct llog_operations *op)
{
struct llog_ctxt *ctxt;
int rc = 0;
ENTRY;
if (index < 0 || index >= LLOG_MAX_CTXTS)
RETURN(-EINVAL);
LASSERT(olg != NULL);
ctxt = llog_new_ctxt(obd);
if (!ctxt)
RETURN(-ENOMEM);
ctxt->loc_obd = obd;
ctxt->loc_olg = olg;
ctxt->loc_idx = index;
ctxt->loc_logops = op;
mutex_init(&ctxt->loc_mutex);
if (disk_obd != NULL)
ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
else
ctxt->loc_exp = class_export_get(obd->obd_self_export);
ctxt->loc_flags = LLOG_CTXT_FLAG_UNINITIALIZED;
ctxt->loc_chunk_size = LLOG_MIN_CHUNK_SIZE;
rc = llog_group_set_ctxt(olg, ctxt, index);
if (rc) {
llog_ctxt_destroy(ctxt);
if (rc == -EEXIST) {
ctxt = llog_group_get_ctxt(olg, index);
if (ctxt) {
CDEBUG(D_CONFIG, "%s: ctxt %d already set up\n",
obd->obd_name, index);
LASSERT(ctxt->loc_olg == olg);
LASSERT(ctxt->loc_obd == obd);
if (disk_obd != NULL)
LASSERT(ctxt->loc_exp ==
disk_obd->obd_self_export);
else
LASSERT(ctxt->loc_exp ==
obd->obd_self_export);
LASSERT(ctxt->loc_logops == op);
llog_ctxt_put(ctxt);
}
rc = 0;
}
RETURN(rc);
}
if (op->lop_setup) {
if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LLOG_SETUP))
rc = -EOPNOTSUPP;
else
rc = op->lop_setup(env, obd, olg, index, disk_obd);
}
if (rc) {
CERROR("%s: ctxt %d lop_setup=%p failed: rc = %d\n",
obd->obd_name, index, op->lop_setup, rc);
llog_group_clear_ctxt(olg, index);
llog_ctxt_destroy(ctxt);
} else {
CDEBUG(D_CONFIG, "obd %s ctxt %d is initialized\n",
obd->obd_name, index);
ctxt->loc_flags &= ~LLOG_CTXT_FLAG_UNINITIALIZED;
}
RETURN(rc);
}
