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render/allocator: use legacy authentication for primary nodes
Closes: https://github.com/swaywm/wlroots/issues/3156
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1 changed files with 23 additions and 0 deletions
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@ -35,8 +35,31 @@ static int reopen_drm_node(int drm_fd) {
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int new_fd = open(name, O_RDWR | O_CLOEXEC);
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int new_fd = open(name, O_RDWR | O_CLOEXEC);
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if (new_fd < 0) {
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if (new_fd < 0) {
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wlr_log_errno(WLR_ERROR, "Failed to open DRM node '%s'", name);
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wlr_log_errno(WLR_ERROR, "Failed to open DRM node '%s'", name);
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}
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free(name);
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free(name);
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return -1;
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}
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free(name);
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// If we're using a DRM primary node (e.g. because we're running under the
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// DRM backend, or because we're on split render/display machine), we need
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// to use the legacy DRM authentication mechanism to have the permission to
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// manipulate buffers.
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if (drmGetNodeTypeFromFd(new_fd) == DRM_NODE_PRIMARY) {
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drm_magic_t magic;
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if (drmGetMagic(new_fd, &magic) < 0) {
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wlr_log_errno(WLR_ERROR, "drmGetMagic failed");
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close(new_fd);
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return -1;
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}
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if (drmAuthMagic(drm_fd, magic) < 0) {
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wlr_log_errno(WLR_ERROR, "drmAuthMagic failed");
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close(new_fd);
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return -1;
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}
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}
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return new_fd;
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return new_fd;
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}
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}
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