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Resolve checkpatch issues for missing blank lines after declarations. Issues found in multiple files with checkpatch.pl. Signed-off-by: Suraj Upadhyay <usuraj35@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20200702131749.GA25710@blackclown
757 lines
20 KiB
C
757 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright © 2017 Keith Packard <keithp@keithp.com>
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*/
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#include <linux/file.h>
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#include <linux/uaccess.h>
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#include <drm/drm_auth.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_file.h>
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#include <drm/drm_lease.h>
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#include <drm/drm_print.h>
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#include "drm_crtc_internal.h"
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#include "drm_internal.h"
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#include "drm_legacy.h"
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#define drm_for_each_lessee(lessee, lessor) \
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list_for_each_entry((lessee), &(lessor)->lessees, lessee_list)
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static uint64_t drm_lease_idr_object;
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/**
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* drm_lease_owner - return ancestor owner drm_master
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* @master: drm_master somewhere within tree of lessees and lessors
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*
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* RETURN:
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*
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* drm_master at the top of the tree (i.e, with lessor NULL
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*/
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struct drm_master *drm_lease_owner(struct drm_master *master)
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{
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while (master->lessor != NULL)
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master = master->lessor;
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return master;
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}
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/**
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* _drm_find_lessee - find lessee by id (idr_mutex held)
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* @master: drm_master of lessor
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* @lessee_id: id
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*
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* RETURN:
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*
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* drm_master of the lessee if valid, NULL otherwise
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*/
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static struct drm_master*
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_drm_find_lessee(struct drm_master *master, int lessee_id)
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{
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lockdep_assert_held(&master->dev->mode_config.idr_mutex);
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return idr_find(&drm_lease_owner(master)->lessee_idr, lessee_id);
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}
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/**
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* _drm_lease_held_master - check to see if an object is leased (or owned) by master (idr_mutex held)
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* @master: the master to check the lease status of
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* @id: the id to check
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*
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* Checks if the specified master holds a lease on the object. Return
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* value:
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*
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* true 'master' holds a lease on (or owns) the object
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* false 'master' does not hold a lease.
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*/
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static int _drm_lease_held_master(struct drm_master *master, int id)
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{
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lockdep_assert_held(&master->dev->mode_config.idr_mutex);
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if (master->lessor)
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return idr_find(&master->leases, id) != NULL;
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return true;
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}
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/**
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* _drm_has_leased - check to see if an object has been leased (idr_mutex held)
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* @master: the master to check the lease status of
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* @id: the id to check
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*
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* Checks if any lessee of 'master' holds a lease on 'id'. Return
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* value:
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*
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* true Some lessee holds a lease on the object.
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* false No lessee has a lease on the object.
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*/
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static bool _drm_has_leased(struct drm_master *master, int id)
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{
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struct drm_master *lessee;
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lockdep_assert_held(&master->dev->mode_config.idr_mutex);
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drm_for_each_lessee(lessee, master)
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if (_drm_lease_held_master(lessee, id))
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return true;
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return false;
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}
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/**
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* _drm_lease_held - check drm_mode_object lease status (idr_mutex held)
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* @file_priv: the master drm_file
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* @id: the object id
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*
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* Checks if the specified master holds a lease on the object. Return
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* value:
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*
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* true 'master' holds a lease on (or owns) the object
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* false 'master' does not hold a lease.
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*/
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bool _drm_lease_held(struct drm_file *file_priv, int id)
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{
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if (!file_priv || !file_priv->master)
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return true;
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return _drm_lease_held_master(file_priv->master, id);
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}
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/**
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* drm_lease_held - check drm_mode_object lease status (idr_mutex not held)
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* @file_priv: the master drm_file
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* @id: the object id
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*
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* Checks if the specified master holds a lease on the object. Return
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* value:
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*
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* true 'master' holds a lease on (or owns) the object
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* false 'master' does not hold a lease.
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*/
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bool drm_lease_held(struct drm_file *file_priv, int id)
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{
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struct drm_master *master;
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bool ret;
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if (!file_priv || !file_priv->master || !file_priv->master->lessor)
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return true;
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master = file_priv->master;
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mutex_lock(&master->dev->mode_config.idr_mutex);
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ret = _drm_lease_held_master(master, id);
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mutex_unlock(&master->dev->mode_config.idr_mutex);
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return ret;
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}
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/**
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* drm_lease_filter_crtcs - restricted crtc set to leased values (idr_mutex not held)
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* @file_priv: requestor file
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* @crtcs_in: bitmask of crtcs to check
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*
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* Reconstructs a crtc mask based on the crtcs which are visible
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* through the specified file.
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*/
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uint32_t drm_lease_filter_crtcs(struct drm_file *file_priv, uint32_t crtcs_in)
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{
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struct drm_master *master;
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struct drm_device *dev;
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struct drm_crtc *crtc;
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int count_in, count_out;
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uint32_t crtcs_out = 0;
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if (!file_priv || !file_priv->master || !file_priv->master->lessor)
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return crtcs_in;
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master = file_priv->master;
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dev = master->dev;
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count_in = count_out = 0;
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mutex_lock(&master->dev->mode_config.idr_mutex);
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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if (_drm_lease_held_master(master, crtc->base.id)) {
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uint32_t mask_in = 1ul << count_in;
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if ((crtcs_in & mask_in) != 0) {
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uint32_t mask_out = 1ul << count_out;
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crtcs_out |= mask_out;
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}
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count_out++;
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}
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count_in++;
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}
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mutex_unlock(&master->dev->mode_config.idr_mutex);
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return crtcs_out;
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}
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/*
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* drm_lease_create - create a new drm_master with leased objects (idr_mutex not held)
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* @lessor: lease holder (or owner) of objects
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* @leases: objects to lease to the new drm_master
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*
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* Uses drm_master_create to allocate a new drm_master, then checks to
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* make sure all of the desired objects can be leased, atomically
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* leasing them to the new drmmaster.
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*
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* ERR_PTR(-EACCES) some other master holds the title to any object
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* ERR_PTR(-ENOENT) some object is not a valid DRM object for this device
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* ERR_PTR(-EBUSY) some other lessee holds title to this object
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* ERR_PTR(-EEXIST) same object specified more than once in the provided list
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* ERR_PTR(-ENOMEM) allocation failed
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*/
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static struct drm_master *drm_lease_create(struct drm_master *lessor, struct idr *leases)
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{
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struct drm_device *dev = lessor->dev;
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int error;
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struct drm_master *lessee;
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int object;
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int id;
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void *entry;
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DRM_DEBUG_LEASE("lessor %d\n", lessor->lessee_id);
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lessee = drm_master_create(lessor->dev);
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if (!lessee) {
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DRM_DEBUG_LEASE("drm_master_create failed\n");
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return ERR_PTR(-ENOMEM);
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}
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mutex_lock(&dev->mode_config.idr_mutex);
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idr_for_each_entry(leases, entry, object) {
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error = 0;
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if (!idr_find(&dev->mode_config.object_idr, object))
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error = -ENOENT;
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else if (_drm_has_leased(lessor, object))
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error = -EBUSY;
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if (error != 0) {
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DRM_DEBUG_LEASE("object %d failed %d\n", object, error);
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goto out_lessee;
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}
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}
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/* Insert the new lessee into the tree */
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id = idr_alloc(&(drm_lease_owner(lessor)->lessee_idr), lessee, 1, 0, GFP_KERNEL);
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if (id < 0) {
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error = id;
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goto out_lessee;
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}
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lessee->lessee_id = id;
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lessee->lessor = drm_master_get(lessor);
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list_add_tail(&lessee->lessee_list, &lessor->lessees);
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/* Move the leases over */
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lessee->leases = *leases;
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DRM_DEBUG_LEASE("new lessee %d %p, lessor %d %p\n", lessee->lessee_id, lessee, lessor->lessee_id, lessor);
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mutex_unlock(&dev->mode_config.idr_mutex);
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return lessee;
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out_lessee:
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mutex_unlock(&dev->mode_config.idr_mutex);
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drm_master_put(&lessee);
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return ERR_PTR(error);
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}
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/**
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* drm_lease_destroy - a master is going away (idr_mutex not held)
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* @master: the drm_master being destroyed
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*
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* All lessees will have been destroyed as they
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* hold a reference on their lessor. Notify any
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* lessor for this master so that it can check
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* the list of lessees.
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*/
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void drm_lease_destroy(struct drm_master *master)
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{
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struct drm_device *dev = master->dev;
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mutex_lock(&dev->mode_config.idr_mutex);
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DRM_DEBUG_LEASE("drm_lease_destroy %d\n", master->lessee_id);
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/* This master is referenced by all lessees, hence it cannot be destroyed
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* until all of them have been
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*/
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WARN_ON(!list_empty(&master->lessees));
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/* Remove this master from the lessee idr in the owner */
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if (master->lessee_id != 0) {
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DRM_DEBUG_LEASE("remove master %d from device list of lessees\n", master->lessee_id);
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idr_remove(&(drm_lease_owner(master)->lessee_idr), master->lessee_id);
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}
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/* Remove this master from any lessee list it may be on */
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list_del(&master->lessee_list);
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mutex_unlock(&dev->mode_config.idr_mutex);
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if (master->lessor) {
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/* Tell the master to check the lessee list */
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drm_sysfs_lease_event(dev);
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drm_master_put(&master->lessor);
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}
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DRM_DEBUG_LEASE("drm_lease_destroy done %d\n", master->lessee_id);
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}
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/**
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* _drm_lease_revoke - revoke access to all leased objects (idr_mutex held)
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* @top: the master losing its lease
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*/
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static void _drm_lease_revoke(struct drm_master *top)
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{
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int object;
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void *entry;
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struct drm_master *master = top;
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lockdep_assert_held(&top->dev->mode_config.idr_mutex);
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/*
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* Walk the tree starting at 'top' emptying all leases. Because
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* the tree is fully connected, we can do this without recursing
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*/
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for (;;) {
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DRM_DEBUG_LEASE("revoke leases for %p %d\n", master, master->lessee_id);
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/* Evacuate the lease */
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idr_for_each_entry(&master->leases, entry, object)
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idr_remove(&master->leases, object);
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/* Depth-first list walk */
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/* Down */
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if (!list_empty(&master->lessees)) {
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master = list_first_entry(&master->lessees, struct drm_master, lessee_list);
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} else {
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/* Up */
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while (master != top && master == list_last_entry(&master->lessor->lessees, struct drm_master, lessee_list))
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master = master->lessor;
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if (master == top)
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break;
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/* Over */
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master = list_next_entry(master, lessee_list);
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}
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}
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}
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/**
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* drm_lease_revoke - revoke access to all leased objects (idr_mutex not held)
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* @top: the master losing its lease
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*/
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void drm_lease_revoke(struct drm_master *top)
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{
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mutex_lock(&top->dev->mode_config.idr_mutex);
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_drm_lease_revoke(top);
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mutex_unlock(&top->dev->mode_config.idr_mutex);
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}
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static int validate_lease(struct drm_device *dev,
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int object_count,
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struct drm_mode_object **objects,
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bool universal_planes)
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{
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int o;
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int has_crtc = -1;
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int has_connector = -1;
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int has_plane = -1;
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/* we want to confirm that there is at least one crtc, plane
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connector object. */
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for (o = 0; o < object_count; o++) {
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if (objects[o]->type == DRM_MODE_OBJECT_CRTC && has_crtc == -1) {
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has_crtc = o;
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}
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if (objects[o]->type == DRM_MODE_OBJECT_CONNECTOR && has_connector == -1)
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has_connector = o;
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if (universal_planes) {
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if (objects[o]->type == DRM_MODE_OBJECT_PLANE && has_plane == -1)
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has_plane = o;
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}
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}
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if (has_crtc == -1 || has_connector == -1)
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return -EINVAL;
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if (universal_planes && has_plane == -1)
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return -EINVAL;
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return 0;
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}
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static int fill_object_idr(struct drm_device *dev,
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struct drm_file *lessor_priv,
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struct idr *leases,
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int object_count,
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u32 *object_ids)
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{
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struct drm_mode_object **objects;
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u32 o;
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int ret;
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bool universal_planes = READ_ONCE(lessor_priv->universal_planes);
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objects = kcalloc(object_count, sizeof(struct drm_mode_object *),
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GFP_KERNEL);
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if (!objects)
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return -ENOMEM;
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/* step one - get references to all the mode objects
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and check for validity. */
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for (o = 0; o < object_count; o++) {
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objects[o] = drm_mode_object_find(dev, lessor_priv,
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object_ids[o],
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DRM_MODE_OBJECT_ANY);
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if (!objects[o]) {
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ret = -ENOENT;
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goto out_free_objects;
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}
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if (!drm_mode_object_lease_required(objects[o]->type)) {
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DRM_DEBUG_KMS("invalid object for lease\n");
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ret = -EINVAL;
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goto out_free_objects;
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}
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}
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ret = validate_lease(dev, object_count, objects, universal_planes);
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if (ret) {
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DRM_DEBUG_LEASE("lease validation failed\n");
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goto out_free_objects;
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}
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/* add their IDs to the lease request - taking into account
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universal planes */
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for (o = 0; o < object_count; o++) {
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struct drm_mode_object *obj = objects[o];
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u32 object_id = objects[o]->id;
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DRM_DEBUG_LEASE("Adding object %d to lease\n", object_id);
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/*
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* We're using an IDR to hold the set of leased
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* objects, but we don't need to point at the object's
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* data structure from the lease as the main object_idr
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* will be used to actually find that. Instead, all we
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* really want is a 'leased/not-leased' result, for
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* which any non-NULL pointer will work fine.
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*/
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ret = idr_alloc(leases, &drm_lease_idr_object , object_id, object_id + 1, GFP_KERNEL);
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if (ret < 0) {
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DRM_DEBUG_LEASE("Object %d cannot be inserted into leases (%d)\n",
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object_id, ret);
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goto out_free_objects;
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}
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if (obj->type == DRM_MODE_OBJECT_CRTC && !universal_planes) {
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struct drm_crtc *crtc = obj_to_crtc(obj);
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ret = idr_alloc(leases, &drm_lease_idr_object, crtc->primary->base.id, crtc->primary->base.id + 1, GFP_KERNEL);
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if (ret < 0) {
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DRM_DEBUG_LEASE("Object primary plane %d cannot be inserted into leases (%d)\n",
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object_id, ret);
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goto out_free_objects;
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}
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if (crtc->cursor) {
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ret = idr_alloc(leases, &drm_lease_idr_object, crtc->cursor->base.id, crtc->cursor->base.id + 1, GFP_KERNEL);
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if (ret < 0) {
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DRM_DEBUG_LEASE("Object cursor plane %d cannot be inserted into leases (%d)\n",
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object_id, ret);
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goto out_free_objects;
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}
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}
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}
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}
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ret = 0;
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out_free_objects:
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for (o = 0; o < object_count; o++) {
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if (objects[o])
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drm_mode_object_put(objects[o]);
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}
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kfree(objects);
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return ret;
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}
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/**
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* drm_mode_create_lease_ioctl - create a new lease
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* @dev: the drm device
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* @data: pointer to struct drm_mode_create_lease
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* @lessor_priv: the file being manipulated
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*
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* The master associated with the specified file will have a lease
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* created containing the objects specified in the ioctl structure.
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* A file descriptor will be allocated for that and returned to the
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* application.
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*/
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int drm_mode_create_lease_ioctl(struct drm_device *dev,
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void *data, struct drm_file *lessor_priv)
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{
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struct drm_mode_create_lease *cl = data;
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size_t object_count;
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int ret = 0;
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struct idr leases;
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struct drm_master *lessor = lessor_priv->master;
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struct drm_master *lessee = NULL;
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struct file *lessee_file = NULL;
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|
struct file *lessor_file = lessor_priv->filp;
|
|
struct drm_file *lessee_priv;
|
|
int fd = -1;
|
|
uint32_t *object_ids;
|
|
|
|
/* Can't lease without MODESET */
|
|
if (!drm_core_check_feature(dev, DRIVER_MODESET))
|
|
return -EOPNOTSUPP;
|
|
|
|
/* Do not allow sub-leases */
|
|
if (lessor->lessor) {
|
|
DRM_DEBUG_LEASE("recursive leasing not allowed\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* need some objects */
|
|
if (cl->object_count == 0) {
|
|
DRM_DEBUG_LEASE("no objects in lease\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (cl->flags && (cl->flags & ~(O_CLOEXEC | O_NONBLOCK))) {
|
|
DRM_DEBUG_LEASE("invalid flags\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
object_count = cl->object_count;
|
|
|
|
object_ids = memdup_user(u64_to_user_ptr(cl->object_ids),
|
|
array_size(object_count, sizeof(__u32)));
|
|
if (IS_ERR(object_ids))
|
|
return PTR_ERR(object_ids);
|
|
|
|
idr_init(&leases);
|
|
|
|
/* fill and validate the object idr */
|
|
ret = fill_object_idr(dev, lessor_priv, &leases,
|
|
object_count, object_ids);
|
|
kfree(object_ids);
|
|
if (ret) {
|
|
DRM_DEBUG_LEASE("lease object lookup failed: %i\n", ret);
|
|
idr_destroy(&leases);
|
|
return ret;
|
|
}
|
|
|
|
/* Allocate a file descriptor for the lease */
|
|
fd = get_unused_fd_flags(cl->flags & (O_CLOEXEC | O_NONBLOCK));
|
|
if (fd < 0) {
|
|
idr_destroy(&leases);
|
|
return fd;
|
|
}
|
|
|
|
DRM_DEBUG_LEASE("Creating lease\n");
|
|
/* lessee will take the ownership of leases */
|
|
lessee = drm_lease_create(lessor, &leases);
|
|
|
|
if (IS_ERR(lessee)) {
|
|
ret = PTR_ERR(lessee);
|
|
idr_destroy(&leases);
|
|
goto out_leases;
|
|
}
|
|
|
|
/* Clone the lessor file to create a new file for us */
|
|
DRM_DEBUG_LEASE("Allocating lease file\n");
|
|
lessee_file = file_clone_open(lessor_file);
|
|
if (IS_ERR(lessee_file)) {
|
|
ret = PTR_ERR(lessee_file);
|
|
goto out_lessee;
|
|
}
|
|
|
|
lessee_priv = lessee_file->private_data;
|
|
/* Change the file to a master one */
|
|
drm_master_put(&lessee_priv->master);
|
|
lessee_priv->master = lessee;
|
|
lessee_priv->is_master = 1;
|
|
lessee_priv->authenticated = 1;
|
|
|
|
/* Pass fd back to userspace */
|
|
DRM_DEBUG_LEASE("Returning fd %d id %d\n", fd, lessee->lessee_id);
|
|
cl->fd = fd;
|
|
cl->lessee_id = lessee->lessee_id;
|
|
|
|
/* Hook up the fd */
|
|
fd_install(fd, lessee_file);
|
|
|
|
DRM_DEBUG_LEASE("drm_mode_create_lease_ioctl succeeded\n");
|
|
return 0;
|
|
|
|
out_lessee:
|
|
drm_master_put(&lessee);
|
|
|
|
out_leases:
|
|
put_unused_fd(fd);
|
|
|
|
DRM_DEBUG_LEASE("drm_mode_create_lease_ioctl failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* drm_mode_list_lessees_ioctl - list lessee ids
|
|
* @dev: the drm device
|
|
* @data: pointer to struct drm_mode_list_lessees
|
|
* @lessor_priv: the file being manipulated
|
|
*
|
|
* Starting from the master associated with the specified file,
|
|
* the master with the provided lessee_id is found, and then
|
|
* an array of lessee ids associated with leases from that master
|
|
* are returned.
|
|
*/
|
|
|
|
int drm_mode_list_lessees_ioctl(struct drm_device *dev,
|
|
void *data, struct drm_file *lessor_priv)
|
|
{
|
|
struct drm_mode_list_lessees *arg = data;
|
|
__u32 __user *lessee_ids = (__u32 __user *) (uintptr_t) (arg->lessees_ptr);
|
|
__u32 count_lessees = arg->count_lessees;
|
|
struct drm_master *lessor = lessor_priv->master, *lessee;
|
|
int count;
|
|
int ret = 0;
|
|
|
|
if (arg->pad)
|
|
return -EINVAL;
|
|
|
|
/* Can't lease without MODESET */
|
|
if (!drm_core_check_feature(dev, DRIVER_MODESET))
|
|
return -EOPNOTSUPP;
|
|
|
|
DRM_DEBUG_LEASE("List lessees for %d\n", lessor->lessee_id);
|
|
|
|
mutex_lock(&dev->mode_config.idr_mutex);
|
|
|
|
count = 0;
|
|
drm_for_each_lessee(lessee, lessor) {
|
|
/* Only list un-revoked leases */
|
|
if (!idr_is_empty(&lessee->leases)) {
|
|
if (count_lessees > count) {
|
|
DRM_DEBUG_LEASE("Add lessee %d\n", lessee->lessee_id);
|
|
ret = put_user(lessee->lessee_id, lessee_ids + count);
|
|
if (ret)
|
|
break;
|
|
}
|
|
count++;
|
|
}
|
|
}
|
|
|
|
DRM_DEBUG_LEASE("Lessor leases to %d\n", count);
|
|
if (ret == 0)
|
|
arg->count_lessees = count;
|
|
|
|
mutex_unlock(&dev->mode_config.idr_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* drm_mode_get_lease_ioctl - list leased objects
|
|
* @dev: the drm device
|
|
* @data: pointer to struct drm_mode_get_lease
|
|
* @lessee_priv: the file being manipulated
|
|
*
|
|
* Return the list of leased objects for the specified lessee
|
|
*/
|
|
|
|
int drm_mode_get_lease_ioctl(struct drm_device *dev,
|
|
void *data, struct drm_file *lessee_priv)
|
|
{
|
|
struct drm_mode_get_lease *arg = data;
|
|
__u32 __user *object_ids = (__u32 __user *) (uintptr_t) (arg->objects_ptr);
|
|
__u32 count_objects = arg->count_objects;
|
|
struct drm_master *lessee = lessee_priv->master;
|
|
struct idr *object_idr;
|
|
int count;
|
|
void *entry;
|
|
int object;
|
|
int ret = 0;
|
|
|
|
if (arg->pad)
|
|
return -EINVAL;
|
|
|
|
/* Can't lease without MODESET */
|
|
if (!drm_core_check_feature(dev, DRIVER_MODESET))
|
|
return -EOPNOTSUPP;
|
|
|
|
DRM_DEBUG_LEASE("get lease for %d\n", lessee->lessee_id);
|
|
|
|
mutex_lock(&dev->mode_config.idr_mutex);
|
|
|
|
if (lessee->lessor == NULL)
|
|
/* owner can use all objects */
|
|
object_idr = &lessee->dev->mode_config.object_idr;
|
|
else
|
|
/* lessee can only use allowed object */
|
|
object_idr = &lessee->leases;
|
|
|
|
count = 0;
|
|
idr_for_each_entry(object_idr, entry, object) {
|
|
if (count_objects > count) {
|
|
DRM_DEBUG_LEASE("adding object %d\n", object);
|
|
ret = put_user(object, object_ids + count);
|
|
if (ret)
|
|
break;
|
|
}
|
|
count++;
|
|
}
|
|
|
|
DRM_DEBUG("lease holds %d objects\n", count);
|
|
if (ret == 0)
|
|
arg->count_objects = count;
|
|
|
|
mutex_unlock(&dev->mode_config.idr_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* drm_mode_revoke_lease_ioctl - revoke lease
|
|
* @dev: the drm device
|
|
* @data: pointer to struct drm_mode_revoke_lease
|
|
* @lessor_priv: the file being manipulated
|
|
*
|
|
* This removes all of the objects from the lease without
|
|
* actually getting rid of the lease itself; that way all
|
|
* references to it still work correctly
|
|
*/
|
|
int drm_mode_revoke_lease_ioctl(struct drm_device *dev,
|
|
void *data, struct drm_file *lessor_priv)
|
|
{
|
|
struct drm_mode_revoke_lease *arg = data;
|
|
struct drm_master *lessor = lessor_priv->master;
|
|
struct drm_master *lessee;
|
|
int ret = 0;
|
|
|
|
DRM_DEBUG_LEASE("revoke lease for %d\n", arg->lessee_id);
|
|
|
|
/* Can't lease without MODESET */
|
|
if (!drm_core_check_feature(dev, DRIVER_MODESET))
|
|
return -EOPNOTSUPP;
|
|
|
|
mutex_lock(&dev->mode_config.idr_mutex);
|
|
|
|
lessee = _drm_find_lessee(lessor, arg->lessee_id);
|
|
|
|
/* No such lessee */
|
|
if (!lessee) {
|
|
ret = -ENOENT;
|
|
goto fail;
|
|
}
|
|
|
|
/* Lease is not held by lessor */
|
|
if (lessee->lessor != lessor) {
|
|
ret = -EACCES;
|
|
goto fail;
|
|
}
|
|
|
|
_drm_lease_revoke(lessee);
|
|
|
|
fail:
|
|
mutex_unlock(&dev->mode_config.idr_mutex);
|
|
|
|
return ret;
|
|
}
|