/**
* Helper function to open llog or create it if doesn't exist.
* It hides all transaction handling from caller.
*/
int llog_open_create(const struct lu_env *env, struct llog_ctxt *ctxt,
struct llog_handle **res, struct llog_logid *logid,
char *name)
{
struct dt_device *d;
struct thandle *th;
int rc;
rc = llog_open(env, ctxt, res, logid, name, LLOG_OPEN_NEW);
if (rc)
return rc;
if (llog_exist(*res))
return 0;
LASSERT((*res)->lgh_obj != NULL);
d = lu2dt_dev((*res)->lgh_obj->do_lu.lo_dev);
th = dt_trans_create(env, d);
if (IS_ERR(th))
GOTO(out, rc = PTR_ERR(th));
rc = llog_declare_create(env, *res, th);
if (rc == 0) {
rc = dt_trans_start_local(env, d, th);
if (rc == 0)
rc = llog_create(env, *res, th);
}
dt_trans_stop(env, d, th);
out:
if (rc)
llog_close(env, *res);
return rc;
}
/**
* Helper function to open llog or create it if doesn't exist.
* It hides all transaction handling from caller.
*/
int llog_open_create(const struct lu_env *env, struct llog_ctxt *ctxt,
struct llog_handle **res, struct llog_logid *logid,
char *name)
{
struct dt_device *d;
struct thandle *th;
int rc;
ENTRY;
rc = llog_open(env, ctxt, res, logid, name, LLOG_OPEN_NEW);
if (rc)
RETURN(rc);
if (llog_exist(*res))
RETURN(0);
LASSERT((*res)->lgh_obj != NULL);
d = lu2dt_dev((*res)->lgh_obj->do_lu.lo_dev);
th = dt_trans_create(env, d);
if (IS_ERR(th))
GOTO(out, rc = PTR_ERR(th));
/* Create update llog object synchronously, which
* happens during inialization process see
* lod_sub_prep_llog(), to make sure the update
* llog object is created before corss-MDT writing
* updates into the llog object */
if (ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID)
th->th_sync = 1;
th->th_wait_submit = 1;
rc = llog_declare_create(env, *res, th);
if (rc == 0) {
rc = dt_trans_start_local(env, d, th);
if (rc == 0)
rc = llog_create(env, *res, th);
}
dt_trans_stop(env, d, th);
out:
if (rc)
llog_close(env, *res);
RETURN(rc);
}
