mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
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01d1e29402
Use a single `sscanf()` instead of multiple `strtok()`, `atoi()` calls. After this change all three components are required to be present.
108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
// Copyright (c) 2023 The wlroots contributors
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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// of the Software, and to permit persons to whom the Software is furnished to do
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// so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// Obtained from https://gitlab.freedesktop.org/wlroots/wlroots/
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/* SPDX-FileCopyrightText: Copyright © 2023 The wlroots contributors */
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/* SPDX-License-Identifier: MIT */
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#include <linux/dma-buf.h>
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#include <linux/version.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/utsname.h>
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#include <xf86drm.h>
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#include <errno.h>
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#include <spa/support/log.h>
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#include <spa/utils/result.h>
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#include "dmabuf.h"
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bool dmabuf_check_sync_file_import_export(struct spa_log *log) {
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/* Unfortunately there's no better way to check the availability of the
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* IOCTL than to check the kernel version. See the discussion at:
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* https://lore.kernel.org/dri-devel/20220601161303.64797-1-contact@emersion.fr/
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*/
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struct utsname utsname = {0};
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if (uname(&utsname) != 0) {
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spa_log_warn(log, "uname failed");
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return false;
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}
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if (strcmp(utsname.sysname, "Linux") != 0) {
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return false;
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}
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unsigned int major, minor, patch;
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if (sscanf(utsname.release, "%u.%u.%u", &major, &minor, &patch) != 3)
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return false;
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return KERNEL_VERSION(major, minor, patch) >= KERNEL_VERSION(5, 20, 0);
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}
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// TODO: drop these definitions once widespread
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#if !defined(DMA_BUF_IOCTL_IMPORT_SYNC_FILE)
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struct dma_buf_import_sync_file {
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__u32 flags;
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__s32 fd;
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};
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#define DMA_BUF_IOCTL_IMPORT_SYNC_FILE _IOW(DMA_BUF_BASE, 3, struct dma_buf_import_sync_file)
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#endif
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#if !defined(DMA_BUF_IOCTL_EXPORT_SYNC_FILE)
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struct dma_buf_export_sync_file {
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__u32 flags;
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__s32 fd;
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};
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#define DMA_BUF_IOCTL_EXPORT_SYNC_FILE _IOWR(DMA_BUF_BASE, 2, struct dma_buf_export_sync_file)
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#endif
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bool dmabuf_import_sync_file(struct spa_log *log, int dmabuf_fd, uint32_t flags, int sync_file_fd) {
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struct dma_buf_import_sync_file data = {
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.flags = flags,
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.fd = sync_file_fd,
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};
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if (drmIoctl(dmabuf_fd, DMA_BUF_IOCTL_IMPORT_SYNC_FILE, &data) != 0) {
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spa_log_error(log, "drmIoctl(IMPORT_SYNC_FILE) failed with %d (%s)", errno, spa_strerror(-errno));
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return false;
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}
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return true;
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}
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int dmabuf_export_sync_file(struct spa_log *log, int dmabuf_fd, uint32_t flags) {
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struct dma_buf_export_sync_file data = {
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.flags = flags,
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.fd = -1,
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};
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if (drmIoctl(dmabuf_fd, DMA_BUF_IOCTL_EXPORT_SYNC_FILE, &data) != 0) {
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spa_log_error(log, "drmIoctl(EXPORT_SYNC_FILE) failed with %d (%s)", errno, spa_strerror(-errno));
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return -1;
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}
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return data.fd;
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}
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