/* Find and cancel locally locks matched by inode @bits & @mode in the resource
* found by @fid. Found locks are added into @cancel list. Returns the amount of
* locks added to @cancels list. */
int mdc_resource_get_unused(struct obd_export *exp, const struct lu_fid *fid,
struct list_head *cancels, enum ldlm_mode mode,
__u64 bits)
{
struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
union ldlm_policy_data policy = { {0} };
struct ldlm_res_id res_id;
struct ldlm_resource *res;
int count;
ENTRY;
/* Return, i.e. cancel nothing, only if ELC is supported (flag in
* export) but disabled through procfs (flag in NS).
*
* This distinguishes from a case when ELC is not supported originally,
* when we still want to cancel locks in advance and just cancel them
* locally, without sending any RPC. */
if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
RETURN(0);
fid_build_reg_res_name(fid, &res_id);
res = ldlm_resource_get(exp->exp_obd->obd_namespace,
NULL, &res_id, 0, 0);
if (IS_ERR(res))
RETURN(0);
LDLM_RESOURCE_ADDREF(res);
/* Initialize ibits lock policy. */
policy.l_inodebits.bits = bits;
count = ldlm_cancel_resource_local(res, cancels, &policy,
mode, 0, 0, NULL);
LDLM_RESOURCE_DELREF(res);
ldlm_resource_putref(res);
RETURN(count);
}
/* Find and cancel locally locks matched by inode @bits & @mode in the resource
* found by @fid. Found locks are added into @cancel list. Returns the amount of
* locks added to @cancels list. */
int mdc_resource_get_unused(struct obd_export *exp, struct lu_fid *fid,
cfs_list_t *cancels, ldlm_mode_t mode,
__u64 bits)
{
ldlm_policy_data_t policy = {{0}};
struct ldlm_res_id res_id;
struct ldlm_resource *res;
int count;
ENTRY;
fid_build_reg_res_name(fid, &res_id);
res = ldlm_resource_get(exp->exp_obd->obd_namespace,
NULL, &res_id, 0, 0);
if (res == NULL)
RETURN(0);
LDLM_RESOURCE_ADDREF(res);
/* Initialize ibits lock policy. */
policy.l_inodebits.bits = bits;
count = ldlm_cancel_resource_local(res, cancels, &policy,
mode, 0, 0, NULL);
LDLM_RESOURCE_DELREF(res);
ldlm_resource_putref(res);
RETURN(count);
}
