This patchset contains the anonymous dup implementation with permissions checking for the ALSA's PCM interface in kernel to enable the restricted DMA sound buffer sharing for the restricted tasks. The code was tested through qemu and it seems to be pretty stable. The initial tinyalsa implementation can be found here: https://github.com/perexg/tinyalsa/commits/anondup The filtering might be refined. It depends on the real requirements. Perhaps, we may create more ioctl groups. Any comments are more than welcome. Cc: Mark Brown <broonie@xxxxxxxxxx> Cc: Leo Yan <leo.yan@xxxxxxxxxx> Cc: Baolin Wang <baolin.wang@xxxxxxxxxx> Jaroslav Kysela (3): ALSA: pcm: implement the anonymous dup (inode file descriptor) ALSA: pcm: remove the file member from struct pcm ALSA: pcm: implement the ioctl/mmap filter for the anonymous dup include/sound/pcm.h | 10 +-- include/uapi/sound/asound.h | 12 +++- sound/core/oss/pcm_oss.c | 3 +- sound/core/pcm.c | 48 +++++++++----- sound/core/pcm_compat.c | 1 + sound/core/pcm_native.c | 154 +++++++++++++++++++++++++++++++++++++++++--- 6 files changed, 195 insertions(+), 33 deletions(-) -- 2.13.6 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
