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提交 599a2005 authored 作者: Giovanni Maruzzelli's avatar Giovanni Maruzzelli
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skypopen: adding osscuse directory, lot of news to come in some days ;)

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src/mod/endpoints/mod_skypopen/osscuse/98-osscuse.rules 0 → 100644
浏览文件 @ 599a2005
# Since these devices are not part of 'sound' subsystem the group is forced
# to audio by name
# /dev/cuse can stay mode 0660 root:root since osspd is run as root
# and drops privileges to user level when opened by user
KERNEL=="dsp", GROUP="audio"
KERNEL=="mixer", GROUP="audio"
KERNEL=="adsp", GROUP="audio"
src/mod/endpoints/mod_skypopen/osscuse/LICENSE 0 → 100644
浏览文件 @ 599a2005
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src/mod/endpoints/mod_skypopen/osscuse/Makefile 0 → 100644
浏览文件 @ 599a2005
# These can be overridden if needed
# DESTDIR is completely respected
CC := gcc
AR := ar
CFLAGS := -Wall $(CFLAGS)
XLDFLAGS := $(LDFLAGS)
LDFLAGS := -L. -lossp $(LDFLAGS)
prefix := /usr/local
DESTDIR :=
UDEVDIR := /etc/udev/rules.d
ifeq "$(origin OSSPD_CFLAGS)" "undefined"
OSSPD_CFLAGS := $(shell pkg-config --cflags fuse)
endif
ifeq "$(origin OSSPD_LDFLAGS)" "undefined"
OSSPD_LDFLAGS := $(shell pkg-config --libs fuse)
endif
ifeq "$(origin OSSP_PADSP_CFLAGS)" "undefined"
OSSP_PADSP_CFLAGS := $(shell pkg-config --cflags libpulse)
endif
ifeq "$(origin OSSP_PADSP_LDFLAGS)" "undefined"
OSSP_PADSP_LDFLAGS := $(shell pkg-config --libs libpulse)
endif
ifeq "$(origin OSSP_ALSAP_CFLAGS)" "undefined"
OSSP_ALSAP_CFLAGS := $(shell pkg-config --libs alsa)
endif
ifeq "$(origin OSSP_ALSAP_LDFLAGS)" "undefined"
OSSP_ALSAP_LDFLAGS := $(shell pkg-config --libs alsa)
endif
headers := ossp.h ossp-util.h ossp-slave.h
#all: osspd ossp-padsp ossp-alsap
all: osspd ossp-alsap
install:
mkdir -p $(DESTDIR)$(prefix)/sbin
install -m755 osspd ossp-padsp ossp-alsap $(DESTDIR)$(prefix)/sbin
mkdir -p $(DESTDIR)$(UDEVDIR)
install -m644 98-osscuse.rules $(DESTDIR)$(UDEVDIR)
libossp.a: ossp.c ossp.h ossp-util.c ossp-util.h ossp-slave.c ossp-slave.h
$(CC) $(CFLAGS) -c -o ossp.o ossp.c
$(CC) $(CFLAGS) -c -o ossp-util.o ossp-util.c
$(CC) $(CFLAGS) -c -o ossp-slave.o ossp-slave.c
$(AR) rc $@ ossp.o ossp-util.o ossp-slave.o
osspd: osspd.c libossp.a $(headers)
$(CC) $(CFLAGS) $(OSSPD_CFLAGS) -o $@ $< $(OSSPD_LDFLAGS) $(LDFLAGS)
ossp-padsp: ossp-padsp.c libossp.a $(headers)
$(CC) $(CFLAGS) $(OSSP_PADSP_CFLAGS) -o $@ $< $(OSSP_PADSP_LDFLAGS) $(LDFLAGS)
ossp-alsap: ossp-alsap.c libossp.a $(headers)
$(CC) $(CFLAGS) $(OSSP_ALSAP_CFLAGS) -o $@ $< $(OSSP_ALSAP_LDFLAGS) $(LDFLAGS)
osstest: osstest.c
$(CC) $(CFLAGS) -o $@ $< $(XLDFLAGS)
test: osstest
@./osstest
clean:
rm -f *.o *.a osspd ossp-padsp ossp-alsap osstest
src/mod/endpoints/mod_skypopen/osscuse/README 0 → 100644
浏览文件 @ 599a2005
OSS Proxy - emulate OSS device using CUSE
Copyright (C) 2008-2009 SUSE Linux Products GmbH
Copyright (C) 2008-2009 Tejun Heo <tj@kernel.org>
1. What is it?
--------------
Well, first, OSS refers to Open Sound System. If it still doesn't
ring a bell, think /dev/dsp, /dev/adsp and /dev/mixer.
Currently, Linux supports two audio programming interface - ALSA and
OSS. The latter one is deprecated and has been that way for a long
time but there still are applications which still use them including
UML (usermode Linux) host sound support.
ALSA contains OSS emulation but sadly the emulation is behind
multiplexing layer (which is in userland) which means that if your
sound card doesn't support multiple audio streams, only either one of
ALSA or OSS interface would be usable at any given moment.
There have been also attempts to emulate OSS in userland using dynamic
library preloading - aoss and more recently padsp. This works for
many applications but it's just not easy to emulate everything using
the technique. Things like polling, signals, forking, privilege
changes make it very difficult to emulate things reliably.
OSS Proxy uses CUSE (extension of FUSE allowing character devices to
be implemented in userspace) to implement OSS interface - /dev/dsp,
/dev/adsp and /dev/mixer. From the POV of the applications, these
devices are proper character devices and behave exactly the same way
so it can be made quite versatile.
2. Hmmm... So, how does the whole thing work?
---------------------------------------------
The OSS Proxy daemon - osspd - should be started first. Note that
osspd will fail to start if sound device number regions are already
occupied. You'll need to turn off OSS or its emulation[1].
On startup, osspd creates /dev/dsp, /dev/adsp and /dev/mixer using
CUSE. When an application access one of the devices, all IOs are
redirected to osspd via CUSE. Upon receiving a new DSP open request,
osspd creates a slave process which drops the root privilege and
assumes the opening process's credentials. After handshaking, osspd
forwards all relevant IOs to the slave which is responsible for
actually playing the sound.
Currently there's only one slave implemented - ossp-padsp, which as
the name suggests forwards (again) the sound to pulseaudio. To sum
up, the whole pipe looks like the following.
App <-> /dev/dsp <-> CUSE <-> osspd <-> ossp-padsp <-> pulseaudio
Which is a lot of forwarding, but on modern machines, it won't be too
noticeable.
3. What works?
--------------
Well, MIDI part isn't implemented and I doubt it will be in any near
future but except that everything should work. Playing, recording,
5.1ch, A-V syncing, all should work. If not, it's a bug, so please
report.
The mixer behaves a bit differently tho. In the original OSS,
/dev/mixer is the hardware mixer, so adjusting volumes there affects
all audio streams. When using ossp, each process group gets its own
mixer and the mixer always contains only two knobs - PCM and IGAIN.
Combined with per-stream volume control of pulseaudio, this scheme
works quite well for applications with embedded volume control
although it makes standalone OSS mixer programs virtually useless[2].
4. How do I use it?
-------------------
First you need CUSE support in kernel which might land on 2.6.28 with
sufficient luck[3] and then you also need libfuse which supports
CUSE[4]. Once you have both, it should be easy. First build it by
running `make'. You can set OSSPD_CFLAGS, OSSPD_LDFLAGS,
OSSP_PADSP_CFLAGS and OSSP_PADSP_LDFLAGS if you have stuff at
non-default locations.
After build completes, there will be two executables - `osspd' and
`ossp-padsp'. Just copy them to where other system executables live.
Specific location doesn't matter as long as both files end up in the
same directory.
Execute `osspd'. It will create the device files and you're all set.
`osspd' uses syslog with LOG_DAEMON facility, so if something doesn't
work take a look at what osspd complains about.
[1] As of this writing, turning on any sound support makes the
soundcore module claim OSS device regions. Patch to make it claim
OSS device regions only when OSS support or emulation is enabled
is scheduled for 2.6.28. Even with the patch, soundcore will
claim OSS device regions if OSS support or ALSA OSS emulation is
enabled. Make sure they're turned off.
[2] If you have a strong reason to use standalone OSS mixer program,
you can play some shell tricks to put it into the same process
group as the target audio application. e.g. To use aumix with
mpg123 - `(mpg123 asdf.mp3 > /dev/null 2>&1 & aumix)', but
seriously, just use PA or ALSA one.
[3] For the time being, here's the git tree with all the necessary
changes. This tree is base on top of 2.6.27-rc3.
http://git.kernel.org/?p=linux/kernel/git/tj/misc.git;a=shortlog;h=cuse
git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git cuse
[4] And libfuse with the modifications can be found at...
http://userweb.kernel.org/~tj/ossp/fuse-cuse.tar.gz
src/mod/endpoints/mod_skypopen/osscuse/ossp-alsap.c 0 → 100644
浏览文件 @ 599a2005
/*
* ossp-alsap - ossp DSP slave which forwards to alsa
*
* Copyright (C) 2009 Maarten Lankhorst <m.b.lankhorst@gmail.com>
*
* This file is released under the GPLv2.
*
* Why an alsa plugin as well? Just to show how much
* the alsa userspace api sucks ;-)
*/
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <libgen.h>
#include <limits.h>
#include <poll.h>
#include <pthread.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <alsa/asoundlib.h>
#include <sys/soundcard.h>
#include "ossp-slave.h"
enum {
AFMT_FLOAT = 0x00004000,
AFMT_S32_LE = 0x00001000,
AFMT_S32_BE = 0x00002000,
};
static size_t page_size;
/* alsa structures */
static snd_pcm_t *pcm[2];
static snd_pcm_hw_params_t *hw_params;
static snd_pcm_sw_params_t *sw_params;
static int block;
static unsigned int byte_counter[2];
static snd_pcm_uframes_t mmap_pos[2];
static int stream_corked[2];
static int stream_notify;
static struct format {
snd_pcm_format_t format;
snd_pcm_sframes_t rate;
int channels;
} hw_format = { SND_PCM_FORMAT_U8, 8000, 1 };
#if 0
/* future mmap stuff */
static size_t mmap_raw_size, mmap_size;
static int mmap_fd[2] = { -1, -1 };
static void *mmap_map[2];
static uint64_t mmap_idx[2]; /* mmap pointer */
static uint64_t mmap_last_idx[2]; /* last idx for get_ptr */
static struct ring_buf mmap_stg[2]; /* staging ring buffer */
static size_t mmap_lead[2]; /* lead bytes */
static int mmap_sync[2]; /* sync with backend stream */
#endif
static snd_pcm_format_t fmt_oss_to_alsa(int fmt)
{
switch (fmt) {
case AFMT_U8: return SND_PCM_FORMAT_U8;
case AFMT_A_LAW: return SND_PCM_FORMAT_A_LAW;
case AFMT_MU_LAW: return SND_PCM_FORMAT_MU_LAW;
case AFMT_S16_LE: return SND_PCM_FORMAT_S16_LE;
case AFMT_S16_BE: return SND_PCM_FORMAT_S16_BE;
case AFMT_FLOAT: return SND_PCM_FORMAT_FLOAT;
case AFMT_S32_LE: return SND_PCM_FORMAT_S32_LE;
case AFMT_S32_BE: return SND_PCM_FORMAT_S32_BE;
default: return SND_PCM_FORMAT_U8;
}
}
static int fmt_alsa_to_oss(snd_pcm_format_t fmt)
{
switch (fmt) {
case SND_PCM_FORMAT_U8: return AFMT_U8;
case SND_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
case SND_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
case SND_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
case SND_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
case SND_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
case SND_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
case SND_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
default: return AFMT_U8;
}
}
static void flush_streams(int drain)
{
/* FIXME: snd_pcm_drain appears to be able to deadlock,
* always drop or check state? */
if (drain) {
if (pcm[PLAY])
snd_pcm_drain(pcm[PLAY]);
if (pcm[REC])
snd_pcm_drain(pcm[REC]);
} else {
if (pcm[PLAY])
snd_pcm_drop(pcm[PLAY]);
if (pcm[REC])
snd_pcm_drop(pcm[REC]);
}
/* XXX: Really needed? */
#if 0
if (pcm[PLAY]) {
snd_pcm_close(pcm[PLAY]);
snd_pcm_open(&pcm[PLAY], "default",
SND_PCM_STREAM_PLAYBACK, block);
}
if (pcm[REC]) {
snd_pcm_close(pcm[REC]);
snd_pcm_open(&pcm[REC], "default",
SND_PCM_STREAM_CAPTURE, block);
}
#endif
}
static void kill_streams(void)
{
flush_streams(0);
}
static int trigger_streams(int play, int rec)
{
int ret = 0;
if (pcm[PLAY] && play >= 0) {
ret = snd_pcm_sw_params_set_start_threshold(pcm[PLAY], sw_params,
play ? 1 : -1);
if (ret >= 0)
snd_pcm_sw_params(pcm[PLAY], sw_params);
}
if (ret >= 0 && pcm[REC] && rec >= 0) {
ret = snd_pcm_sw_params_set_start_threshold(pcm[REC], sw_params,
rec ? 1 : -1);
if (ret >= 0)
snd_pcm_sw_params(pcm[REC], sw_params);
}
return ret;
}
static ssize_t alsap_mixer(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp, int tfd)
{
return -EBUSY;
}
static int set_hw_params(snd_pcm_t *pcm)
{
int ret;
unsigned rate;
ret = snd_pcm_hw_params_any(pcm, hw_params);
if (ret >= 0)
ret = snd_pcm_hw_params_set_access(pcm, hw_params,
SND_PCM_ACCESS_RW_INTERLEAVED);
rate = hw_format.rate;
if (ret >= 0)
ret = snd_pcm_hw_params_set_rate_minmax(pcm, hw_params,
&rate, NULL,
&rate, NULL);
if (ret >= 0)
ret = snd_pcm_hw_params_set_format(pcm, hw_params, hw_format.format);
if (ret >= 0)
ret = snd_pcm_hw_params_set_channels(pcm, hw_params,
hw_format.channels);
if (ret >= 0)
ret = snd_pcm_hw_params(pcm, hw_params);
if (ret >= 0)
ret = snd_pcm_sw_params_current(pcm, sw_params);
if (ret >= 0)
ret = snd_pcm_sw_params(pcm, sw_params);
return ret;
}
static ssize_t alsap_open(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp, int tfd)
{
struct ossp_dsp_open_arg *arg = carg;
int ret;
block = arg->flags & O_NONBLOCK ? SND_PCM_NONBLOCK : 0;
int access;
// block |= SND_PCM_ASYNC;
/* Woop dee dooo.. I love handling things in SIGIO (PAIN!!)
* Probably needed for MMAP
*/
if (!hw_params)
ret = snd_pcm_hw_params_malloc(&hw_params);
if (ret < 0)
return ret;
if (!sw_params)
ret = snd_pcm_sw_params_malloc(&sw_params);
if (ret < 0)
return ret;
if (pcm[PLAY])
snd_pcm_close(pcm[PLAY]);
if (pcm[REC])
snd_pcm_close(pcm[REC]);
pcm[REC] = pcm[PLAY] = NULL;
access = arg->flags & O_ACCMODE;
if (access == O_WRONLY || access == O_RDWR) {
ret = snd_pcm_open(&pcm[PLAY], "default",
SND_PCM_STREAM_PLAYBACK, block);
if (ret >= 0)
ret = set_hw_params(pcm[PLAY]);
}
if (ret >= 0 && (access == O_RDONLY || access == O_RDWR)) {
ret = snd_pcm_open(&pcm[REC], "default",
SND_PCM_STREAM_CAPTURE, block);
if (ret >= 0)
ret = set_hw_params(pcm[REC]);
}
if (ret < 0) {
if (pcm[PLAY])
snd_pcm_close(pcm[PLAY]);
if (pcm[REC])
snd_pcm_close(pcm[REC]);
pcm[REC] = pcm[PLAY] = NULL;
return ret;
}
return 0;
}
#define GIOVANNI
#ifdef GIOVANNI
#define GIOVA_SLEEP 40000
#define GIOVA_BLK 3840
static ssize_t alsap_write(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp, int tfd)
{
usleep((GIOVA_SLEEP/GIOVA_BLK)* din_sz);
return din_sz;
}
static ssize_t alsap_read(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp, int tfd)
{
usleep((GIOVA_SLEEP/GIOVA_BLK)* *dout_szp);
return *dout_szp;
}
#else// GIOVANNI
static ssize_t alsap_write(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp, int tfd)
{
// struct ossp_dsp_rw_arg *arg = carg;
int ret, insize;
insize = snd_pcm_bytes_to_frames(pcm[PLAY], din_sz);
if (snd_pcm_state(pcm[PLAY]) == SND_PCM_STATE_SETUP)
snd_pcm_prepare(pcm[PLAY]);
// snd_pcm_start(pcm[PLAY]);
ret = snd_pcm_writei(pcm[PLAY], din, insize);
if (ret < 0)
ret = snd_pcm_recover(pcm[PLAY], ret, 1);
if (ret >= 0)
return snd_pcm_frames_to_bytes(pcm[PLAY], ret);
else
return ret;
}
static ssize_t alsap_read(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp, int tfd)
{
// struct ossp_dsp_rw_arg *arg = carg;
int ret, outsize;
outsize = snd_pcm_bytes_to_frames(pcm[REC], *dout_szp);
if (snd_pcm_state(pcm[REC]) == SND_PCM_STATE_SETUP)
snd_pcm_prepare(pcm[REC]);
ret = snd_pcm_readi(pcm[REC], dout, outsize);
if (ret < 0)
ret = snd_pcm_recover(pcm[REC], ret, 1);
if (ret >= 0)
*dout_szp = ret = snd_pcm_frames_to_bytes(pcm[REC], ret);
else
*dout_szp = 0;
return ret;
}
#endif// GIOVANNI
static ssize_t alsap_poll(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp, int tfd)
{
unsigned revents = 0;
stream_notify |= *(int *)carg;
if (pcm[PLAY])
revents |= POLLOUT;
if (pcm[REC])
revents |= POLLIN;
*(unsigned *)rarg = revents;
return 0;
}
static ssize_t alsap_flush(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp, int tfd)
{
flush_streams(opcode == OSSP_DSP_SYNC);
return 0;
}
static ssize_t alsap_post(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp, int tfd)
{
int ret;
ret = trigger_streams(1, 1);
if (ret >= 0 && pcm[PLAY])
ret = snd_pcm_start(pcm[PLAY]);
if (pcm[REC])
ret = snd_pcm_start(pcm[REC]);
return ret;
}
static ssize_t alsap_get_param(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp,
int tfd)
{
int v = 0;
switch (opcode) {
case OSSP_DSP_GET_RATE:
return hw_format.rate;
case OSSP_DSP_GET_CHANNELS:
return hw_format.channels;
case OSSP_DSP_GET_FORMAT: {
v = fmt_alsa_to_oss(hw_format.format);
break;
}
case OSSP_DSP_GET_BLKSIZE: {
snd_pcm_uframes_t psize;
snd_pcm_hw_params_get_period_size(hw_params, &psize, NULL);
v = psize;
break;
}
case OSSP_DSP_GET_FORMATS:
v = AFMT_U8 | AFMT_A_LAW | AFMT_MU_LAW | AFMT_S16_LE |
AFMT_S16_BE | AFMT_FLOAT | AFMT_S32_LE | AFMT_S32_BE;
break;
case OSSP_DSP_GET_TRIGGER:
if (!stream_corked[PLAY])
v |= PCM_ENABLE_OUTPUT;
if (!stream_corked[REC])
v |= PCM_ENABLE_INPUT;
break;
default:
assert(0);
}
*(int *)rarg = v;
return 0;
}
static ssize_t alsap_set_param(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp,
int tfd)
{
int v = *(int *)carg;
int ret = 0;
/* kill the streams before changing parameters */
kill_streams();
switch (opcode) {
case OSSP_DSP_SET_RATE: {
hw_format.rate = v;
break;
}
case OSSP_DSP_SET_CHANNELS: {
hw_format.channels = v;
break;
}
case OSSP_DSP_SET_FORMAT: {
snd_pcm_format_t format = fmt_oss_to_alsa(v);
hw_format.format = format;
break;
}
case OSSP_DSP_SET_SUBDIVISION:
if (!v)
v = 1;
#if 0
if (!v) {
v = user_subdivision ?: 1;
break;
}
user_frag_size = 0;
user_subdivision = v;
break;
case OSSP_DSP_SET_FRAGMENT:
user_subdivision = 0;
user_frag_size = 1 << (v & 0xffff);
user_max_frags = (v >> 16) & 0xffff;
if (user_frag_size < 4)
user_frag_size = 4;
if (user_max_frags < 2)
user_max_frags = 2;
#else
case OSSP_DSP_SET_FRAGMENT:
#endif
break;
default:
assert(0);
}
if (pcm[PLAY])
ret = set_hw_params(pcm[PLAY]);
if (ret >= 0 && pcm[REC])
ret = set_hw_params(pcm[REC]);
if (rarg)
*(int *)rarg = v;
return 0;
}
static ssize_t alsap_set_trigger(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp,
int fd)
{
int enable = *(int *)carg;
stream_corked[PLAY] = !!(enable & PCM_ENABLE_OUTPUT);
stream_corked[REC] = !!(enable & PCM_ENABLE_INPUT);
return trigger_streams(enable & PCM_ENABLE_OUTPUT,
enable & PCM_ENABLE_INPUT);
}
static ssize_t alsap_get_space(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp, int tfd)
{
int dir = (opcode == OSSP_DSP_GET_OSPACE) ? PLAY : REC;
int underrun = 0;
struct audio_buf_info info = { };
unsigned long bufsize;
snd_pcm_uframes_t avail, fragsize;
snd_pcm_state_t state;
if (!pcm[dir])
return -EINVAL;
state = snd_pcm_state(pcm[dir]);
if (state == SND_PCM_STATE_XRUN) {
snd_pcm_recover(pcm[dir], -EPIPE, 0);
underrun = 1;
} else if (state == SND_PCM_STATE_SUSPENDED) {
snd_pcm_recover(pcm[dir], -ESTRPIPE, 0);
underrun = 1;
}
snd_pcm_hw_params_current(pcm[dir], hw_params);
snd_pcm_hw_params_get_period_size(hw_params, &fragsize, NULL);
snd_pcm_hw_params_get_buffer_size(hw_params, &bufsize);
info.fragsize = snd_pcm_frames_to_bytes(pcm[dir], fragsize);
info.fragstotal = bufsize / fragsize;
if (!underrun) {
avail = snd_pcm_avail_update(pcm[dir]);
info.fragments = avail / fragsize;
} else
info.fragments = info.fragstotal;
info.bytes = info.fragsize * info.fragments;
*(struct audio_buf_info *)rarg = info;
return 0;
}
static ssize_t alsap_get_ptr(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp, int tfd)
{
int dir = (opcode == OSSP_DSP_GET_OPTR) ? PLAY : REC;
struct count_info info = { };
if (!pcm[dir])
return -EIO;
snd_pcm_hw_params_current(pcm[dir], hw_params);
info.bytes = byte_counter[dir];
snd_pcm_hw_params_get_periods(hw_params, (unsigned int *)&info.blocks, NULL);
info.ptr = mmap_pos[dir];
*(struct count_info *)rarg = info;
return 0;
}
static ssize_t alsap_get_odelay(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp,
int fd)
{
snd_pcm_sframes_t delay;
if (!pcm[PLAY])
return -EIO;
if (snd_pcm_delay(pcm[PLAY], &delay) < 0)
return -EIO;
*(int *)rarg = snd_pcm_frames_to_bytes(pcm[PLAY], delay);
return 0;
}
static ossp_action_fn_t action_fn_tbl[OSSP_NR_OPCODES] = {
[OSSP_MIXER] = alsap_mixer,
[OSSP_DSP_OPEN] = alsap_open,
[OSSP_DSP_READ] = alsap_read,
[OSSP_DSP_WRITE] = alsap_write,
[OSSP_DSP_POLL] = alsap_poll,
#if 0
[OSSP_DSP_MMAP] = alsap_mmap,
[OSSP_DSP_MUNMAP] = alsap_munmap,
#endif
[OSSP_DSP_RESET] = alsap_flush,
[OSSP_DSP_SYNC] = alsap_flush,
[OSSP_DSP_POST] = alsap_post,
[OSSP_DSP_GET_RATE] = alsap_get_param,
[OSSP_DSP_GET_CHANNELS] = alsap_get_param,
[OSSP_DSP_GET_FORMAT] = alsap_get_param,
[OSSP_DSP_GET_BLKSIZE] = alsap_get_param,
[OSSP_DSP_GET_FORMATS] = alsap_get_param,
[OSSP_DSP_SET_RATE] = alsap_set_param,
[OSSP_DSP_SET_CHANNELS] = alsap_set_param,
[OSSP_DSP_SET_FORMAT] = alsap_set_param,
[OSSP_DSP_SET_SUBDIVISION] = alsap_set_param,
[OSSP_DSP_SET_FRAGMENT] = alsap_set_param,
[OSSP_DSP_GET_TRIGGER] = alsap_get_param,
[OSSP_DSP_SET_TRIGGER] = alsap_set_trigger,
[OSSP_DSP_GET_OSPACE] = alsap_get_space,
[OSSP_DSP_GET_ISPACE] = alsap_get_space,
[OSSP_DSP_GET_OPTR] = alsap_get_ptr,
[OSSP_DSP_GET_IPTR] = alsap_get_ptr,
[OSSP_DSP_GET_ODELAY] = alsap_get_odelay,
};
static int action_pre(void)
{
return 0;
}
static void action_post(void)
{
}
int main(int argc, char **argv)
{
int rc;
ossp_slave_init(argc, argv);
page_size = sysconf(_SC_PAGE_SIZE);
/* Okay, now we're open for business */
rc = 0;
do {
rc = ossp_slave_process_command(ossp_cmd_fd, action_fn_tbl,
action_pre, action_post);
} while (rc > 0);
return rc ? 1 : 0;
}
src/mod/endpoints/mod_skypopen/osscuse/ossp-slave.c 0 → 100644
浏览文件 @ 599a2005
/*
* ossp-slave - OSS Proxy: Common codes for slaves
*
* Copyright (C) 2008-2010 SUSE Linux Products GmbH
* Copyright (C) 2008-2010 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pwd.h>
#include <signal.h>
#include "ossp-slave.h"
static const char *usage =
"usage: ossp-SLAVE [options]\n"
"\n"
"proxies commands from osspd to pulseaudio\n"
"\n"
"options:\n"
" -u UID uid to use\n"
" -g GID gid to use\n"
" -c CMD_FD fd to receive commands from osspd\n"
" -n NOTIFY_FD fd to send async notifications to osspd\n"
" -m MMAP_FD fd to use for mmap\n"
" -o MMAP_OFFSET mmap offset\n"
" -s MMAP_SIZE mmap size\n"
" -l LOG_LEVEL set log level\n"
" -t enable log timestamps\n";
char ossp_user_name[OSSP_USER_NAME_LEN];
int ossp_cmd_fd = -1, ossp_notify_fd = -1;
void *ossp_mmap_addr[2];
void ossp_slave_init(int argc, char **argv)
{
int have_uid = 0, have_gid = 0;
uid_t uid;
gid_t gid;
int mmap_fd = -1;
off_t mmap_off = 0;
size_t mmap_size = 0;
int opt;
struct passwd *pw, pw_buf;
struct sigaction sa;
char pw_sbuf[sysconf(_SC_GETPW_R_SIZE_MAX)];
while ((opt = getopt(argc, argv, "u:g:c:n:m:o:s:l:t")) != -1) {
switch (opt) {
case 'u':
have_uid = 1;
uid = strtol(optarg, NULL, 0);
break;
case 'g':
have_gid = 1;
gid = strtol(optarg, NULL, 0);
break;
case 'c':
ossp_cmd_fd = strtol(optarg, NULL, 0);
break;
case 'n':
ossp_notify_fd = strtol(optarg, NULL, 0);
break;
case 'm':
mmap_fd = strtol(optarg, NULL, 0);
break;
case 'o':
mmap_off = strtoull(optarg, NULL, 0);
break;
case 's':
mmap_size = strtoul(optarg, NULL, 0);
break;
case 'l':
ossp_log_level = strtol(optarg, NULL, 0);
break;
case 't':
ossp_log_timestamp = 1;
break;
}
}
if (!have_uid || !have_gid || ossp_cmd_fd < 0 || ossp_notify_fd < 0) {
fprintf(stderr, usage);
_exit(1);
}
snprintf(ossp_user_name, sizeof(ossp_user_name), "uid%d", uid);
if (getpwuid_r(uid, &pw_buf, pw_sbuf, sizeof(pw_sbuf), &pw) == 0)
snprintf(ossp_user_name, sizeof(ossp_user_name), "%s",
pw->pw_name);
snprintf(ossp_log_name, sizeof(ossp_log_name), "ossp-padsp[%s:%d]",
ossp_user_name, getpid());
if (mmap_fd >= 0) {
void *p;
if (!mmap_off || !mmap_size) {
fprintf(stderr, usage);
_exit(1);
}
p = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
mmap_fd, mmap_off);
if (p == MAP_FAILED)
fatal_e(-errno, "mmap failed");
ossp_mmap_addr[PLAY] = p;
ossp_mmap_addr[REC] = p + mmap_size / 2;
close(mmap_fd);
}
/* mmap done, drop privileges */
if (setresgid(gid, gid, gid) || setresuid(uid, uid, uid))
fatal_e(-errno, "failed to drop privileges");
/* block SIGPIPE */
memset(&sa, 0, sizeof(sa));
sa.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &sa, NULL))
fatal_e(-errno, "failed to ignore SIGPIPE");
}
int ossp_slave_process_command(int cmd_fd,
ossp_action_fn_t const *action_fn_tbl,
int (*action_pre_fn)(void),
void (*action_post_fn)(void))
{
static struct sized_buf carg_sbuf = { }, rarg_sbuf = { };
static struct sized_buf din_sbuf = { }, dout_sbuf = { };
struct ossp_cmd cmd;
int fd = -1;
char cmsg_buf[CMSG_SPACE(sizeof(fd))];
struct iovec iov = { &cmd, sizeof(cmd) };
struct msghdr msg = { .msg_iov = &iov, .msg_iovlen = 1,
.msg_control = cmsg_buf,
.msg_controllen = sizeof(cmsg_buf) };
struct cmsghdr *cmsg;
size_t carg_size, din_size, rarg_size, dout_size;
char *carg = NULL, *din = NULL, *rarg = NULL, *dout = NULL;
struct ossp_reply reply = { .magic = OSSP_REPLY_MAGIC };
ssize_t ret;
ret = recvmsg(cmd_fd, &msg, 0);
if (ret == 0)
return 0;
if (ret < 0) {
ret = -errno;
err_e(ret, "failed to read command channel");
return ret;
}
if (ret != sizeof(cmd)) {
err("command struct size mismatch (%zu, should be %zu)",
ret, sizeof(cmd));
return -EINVAL;
}
if (cmd.magic != OSSP_CMD_MAGIC) {
err("illegal command magic 0x%x", cmd.magic);
return -EINVAL;
}
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (cmsg->cmsg_level == SOL_SOCKET &&
cmsg->cmsg_type == SCM_RIGHTS)
fd = *(int *)CMSG_DATA(cmsg);
else {
err("unknown cmsg %d:%d received (opcode %d)",
cmsg->cmsg_level, cmsg->cmsg_type, cmd.opcode);
return -EINVAL;
}
}
if (cmd.opcode >= OSSP_NR_OPCODES) {
err("unknown opcode %d", cmd.opcode);
return -EINVAL;
}
carg_size = ossp_arg_sizes[cmd.opcode].carg_size;
din_size = cmd.din_size;
rarg_size = ossp_arg_sizes[cmd.opcode].rarg_size;
dout_size = cmd.dout_size;
if ((fd >= 0) != ossp_arg_sizes[cmd.opcode].has_fd) {
err("fd=%d unexpected for opcode %d", fd, cmd.opcode);
return -EINVAL;
}
if (ensure_sbuf_size(&carg_sbuf, carg_size) ||
ensure_sbuf_size(&din_sbuf, din_size) ||
ensure_sbuf_size(&rarg_sbuf, rarg_size) ||
ensure_sbuf_size(&dout_sbuf, dout_size)) {
err("failed to allocate command buffers");
return -ENOMEM;
}
if (carg_size) {
carg = carg_sbuf.buf;
ret = read_fill(cmd_fd, carg, carg_size);
if (ret < 0)
return ret;
}
if (din_size) {
din = din_sbuf.buf;
ret = read_fill(cmd_fd, din, din_size);
if (ret < 0)
return ret;
}
if (rarg_size)
rarg = rarg_sbuf.buf;
if (dout_size)
dout = dout_sbuf.buf;
ret = -EINVAL;
if (action_fn_tbl[cmd.opcode]) {
ret = action_pre_fn();
if (ret == 0) {
ret = action_fn_tbl[cmd.opcode](cmd.opcode, carg,
din, din_size, rarg,
dout, &dout_size, fd);
action_post_fn();
}
}
reply.result = ret;
if (ret >= 0)
reply.dout_size = dout_size;
else {
rarg_size = 0;
dout_size = 0;
}
if (write_fill(cmd_fd, &reply, sizeof(reply)) < 0 ||
write_fill(cmd_fd, rarg, rarg_size) < 0 ||
write_fill(cmd_fd, dout, dout_size) < 0)
return -EIO;
return 1;
}
src/mod/endpoints/mod_skypopen/osscuse/ossp-slave.h 0 → 100644
浏览文件 @ 599a2005
/*
* ossp-slave - OSS Proxy: Common codes for slaves
*
* Copyright (C) 2008-2010 SUSE Linux Products GmbH
* Copyright (C) 2008-2010 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/
#ifndef _OSSP_SLAVE_H
#define _OSSP_SLAVE_H
#include "ossp.h"
#include "ossp-util.h"
#define OSSP_USER_NAME_LEN 128
extern char ossp_user_name[OSSP_USER_NAME_LEN];
extern int ossp_cmd_fd, ossp_notify_fd;
extern void *ossp_mmap_addr[2];
void ossp_slave_init(int argc, char **argv);
int ossp_slave_process_command(int cmd_fd,
ossp_action_fn_t const *action_fn_tbl,
int (*action_pre_fn)(void),
void (*action_post_fn)(void));
#endif /* _OSSP_SLAVE_H */
src/mod/endpoints/mod_skypopen/osscuse/ossp-util.c 0 → 100644
浏览文件 @ 599a2005
/*
* ossp-util - OSS Proxy: Common utilities
*
* Copyright (C) 2008-2010 SUSE Linux Products GmbH
* Copyright (C) 2008-2010 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/
#include <ctype.h>
#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <syslog.h>
#include <unistd.h>
#include "ossp-util.h"
#define BIT(nr) (1UL << (nr))
#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG))
#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG)
char ossp_log_name[OSSP_LOG_NAME_LEN];
int ossp_log_level = OSSP_LOG_DFL;
int ossp_log_timestamp;
static const char *severity_strs[] = {
[OSSP_LOG_CRIT] = "CRIT",
[OSSP_LOG_ERR] = " ERR",
[OSSP_LOG_WARN] = "WARN",
[OSSP_LOG_INFO] = NULL,
[OSSP_LOG_DBG0] = "DBG0",
[OSSP_LOG_DBG1] = "DBG1",
};
static int severity_map[] = {
[OSSP_LOG_CRIT] = LOG_ERR,
[OSSP_LOG_ERR] = LOG_ERR,
[OSSP_LOG_WARN] = LOG_WARNING,
[OSSP_LOG_INFO] = LOG_INFO,
[OSSP_LOG_DBG0] = LOG_DEBUG,
[OSSP_LOG_DBG1] = LOG_DEBUG,
};
void log_msg(int severity, const char *fmt, ...)
{
static int syslog_opened = 0;
char buf[1024];
size_t len = sizeof(buf), off = 0;
va_list ap;
if (severity > abs(ossp_log_level))
return;
if (ossp_log_level < 0 && !syslog_opened)
openlog(ossp_log_name, 0, LOG_DAEMON);
assert(severity >= 0 && severity < ARRAY_SIZE(severity_strs));
if (ossp_log_timestamp) {
static uint64_t start;
uint64_t now;
struct timeval tv;
gettimeofday(&tv, NULL);
now = tv.tv_sec * 1000 + tv.tv_usec / 1000;
if (!start)
start = now;
off += snprintf(buf + off, len - off, "<%08"PRIu64"> ",
now - start);
}
if (ossp_log_level > 0) {
char sev_buf[16] = "";
if (severity_strs[severity])
snprintf(sev_buf, sizeof(sev_buf), " %s",
severity_strs[severity]);
off += snprintf(buf + off, len - off, "%s%s: ",
ossp_log_name, sev_buf);
} else if (severity_strs[severity])
off += snprintf(buf + off, len - off, "%s ",
severity_strs[severity]);
va_start(ap, fmt);
off += vsnprintf(buf + off, len - off, fmt, ap);
va_end(ap);
off += snprintf(buf + off, len - off, "\n");
if (ossp_log_level > 0)
fputs(buf, stderr);
else
syslog(severity_map[severity], "%s", buf);
}
int read_fill(int fd, void *buf, size_t size)
{
while (size) {
ssize_t ret;
int rc;
ret = read(fd, buf, size);
if (ret <= 0) {
if (ret == 0)
rc = -EIO;
else
rc = -errno;
err_e(rc, "failed to read_fill %zu bytes from fd %d",
size, fd);
return rc;
}
buf += ret;
size -= ret;
}
return 0;
}
int write_fill(int fd, const void *buf, size_t size)
{
while (size) {
ssize_t ret;
int rc;
ret = write(fd, buf, size);
if (ret <= 0) {
if (ret == 0)
rc = -EIO;
else
rc = -errno;
err_e(rc, "failed to write_fill %zu bytes to fd %d",
size, fd);
return rc;
}
buf += ret;
size -= ret;
}
return 0;
}
void ring_fill(struct ring_buf *ring, const void *buf, size_t size)
{
size_t tail;
assert(ring_space(ring) >= size);
tail = (ring->head + ring->size - ring->bytes) % ring->size;
if (ring->head >= tail) {
size_t todo = min(size, ring->size - ring->head);
memcpy(ring->buf + ring->head, buf, todo);
ring->head = (ring->head + todo) % ring->size;
ring->bytes += todo;
buf += todo;
size -= todo;
}
assert(ring->size - ring->head >= size);
memcpy(ring->buf + ring->head, buf, size);
ring->head += size;
ring->bytes += size;
}
void *ring_data(struct ring_buf *ring, size_t *sizep)
{
size_t tail;
if (!ring->bytes)
return NULL;
tail = (ring->head + ring->size - ring->bytes) % ring->size;
*sizep = min(ring->bytes, ring->size - tail);
return ring->buf + tail;
}
int ring_resize(struct ring_buf *ring, size_t new_size)
{
struct ring_buf new_ring = { .size = new_size };
void *p;
size_t size;
if (ring_bytes(ring) > new_size)
return -ENOSPC;
new_ring.buf = calloc(1, new_size);
if (new_size && !new_ring.buf)
return -ENOMEM;
while ((p = ring_data(ring, &size))) {
ring_fill(&new_ring, p, size);
ring_consume(ring, size);
}
free(ring->buf);
*ring = new_ring;
return 0;
}
int ensure_sbuf_size(struct sized_buf *sbuf, size_t size)
{
char *new_buf;
if (sbuf->size >= size)
return 0;
new_buf = realloc(sbuf->buf, size);
if (size && !new_buf)
return -ENOMEM;
sbuf->buf = new_buf;
sbuf->size = size;
return 0;
}
static unsigned long __ffs(unsigned long word)
{
int num = 0;
if (BITS_PER_LONG == 64) {
if ((word & 0xffffffff) == 0) {
num += 32;
word >>= 32;
}
}
if ((word & 0xffff) == 0) {
num += 16;
word >>= 16;
}
if ((word & 0xff) == 0) {
num += 8;
word >>= 8;
}
if ((word & 0xf) == 0) {
num += 4;
word >>= 4;
}
if ((word & 0x3) == 0) {
num += 2;
word >>= 2;
}
if ((word & 0x1) == 0)
num += 1;
return num;
}
#define ffz(x) __ffs(~(x))
unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size,
unsigned long offset)
{
const unsigned long *p = addr + BITOP_WORD(offset);
unsigned long result = offset & ~(BITS_PER_LONG-1);
unsigned long tmp;
if (offset >= size)
return size;
size -= result;
offset %= BITS_PER_LONG;
if (offset) {
tmp = *(p++);
tmp |= ~0UL >> (BITS_PER_LONG - offset);
if (size < BITS_PER_LONG)
goto found_first;
if (~tmp)
goto found_middle;
size -= BITS_PER_LONG;
result += BITS_PER_LONG;
}
while (size & ~(BITS_PER_LONG-1)) {
if (~(tmp = *(p++)))
goto found_middle;
result += BITS_PER_LONG;
size -= BITS_PER_LONG;
}
if (!size)
return result;
tmp = *p;
found_first:
tmp |= ~0UL << size;
if (tmp == ~0UL) /* Are any bits zero? */
return result + size; /* Nope. */
found_middle:
return result + ffz(tmp);
}
void __set_bit(int nr, volatile unsigned long *addr)
{
unsigned long mask = BIT_MASK(nr);
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
*p |= mask;
}
void __clear_bit(int nr, volatile unsigned long *addr)
{
unsigned long mask = BIT_MASK(nr);
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
*p &= ~mask;
}
int get_proc_self_info(pid_t pid, pid_t *ppid_r,
char *cmd_buf, size_t cmd_buf_sz)
{
char path[64], buf[4096];
int fd = -1;
char *cmd_start, *cmd_end, *ppid_start, *end;
ssize_t ret;
pid_t ppid;
int i, rc;
snprintf(path, sizeof(path), "/proc/%ld/stat", (long)pid);
fd = open(path, O_RDONLY);
if (fd < 0) {
rc = -errno;
goto out;
}
ret = read(fd, buf, sizeof(buf));
if (ret < 0)
goto out;
if (ret == sizeof(buf)) {
rc = -EOVERFLOW;
goto out;
}
buf[ret] = '\0';
rc = -EINVAL;
cmd_start = strchr(buf, '(');
cmd_end = strrchr(buf, ')');
if (!cmd_start || !cmd_end)
goto out;
cmd_start++;
ppid_start = cmd_end;
for (i = 0; i < 3; i++) {
ppid_start = strchr(ppid_start, ' ');
if (!ppid_start)
goto out;
ppid_start++;
}
ppid = strtoul(ppid_start, &end, 10);
if (end == ppid_start || *end != ' ')
goto out;
if (ppid_r)
*ppid_r = ppid;
if (cmd_buf) {
size_t len = min_t(size_t, cmd_end - cmd_start, cmd_buf_sz - 1);
memcpy(cmd_buf, cmd_start, len);
cmd_buf[len] = '\0';
}
rc = 0;
out:
close(fd);
return rc;
}
src/mod/endpoints/mod_skypopen/osscuse/ossp-util.h 0 → 100644
浏览文件 @ 599a2005
/*
* ossp-util - OSS Proxy: Common utilities
*
* Copyright (C) 2008-2010 SUSE Linux Products GmbH
* Copyright (C) 2008-2010 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/
#ifndef _OSSP_UTIL_H
#define _OSSP_UTIL_H
#include <assert.h>
#include <stddef.h>
#include <string.h>
#include <sys/types.h>
#include <errno.h>
#include <unistd.h>
#include "ossp.h"
#define OSSP_LOG_NAME_LEN 128
enum {
OSSP_LOG_CRIT = 1,
OSSP_LOG_ERR,
OSSP_LOG_WARN,
OSSP_LOG_INFO,
OSSP_LOG_DFL = OSSP_LOG_INFO, /* default log level */
OSSP_LOG_DBG0,
OSSP_LOG_DBG1,
OSSP_LOG_MAX = OSSP_LOG_DBG1,
};
extern char ossp_log_name[OSSP_LOG_NAME_LEN];
extern int ossp_log_level;
extern int ossp_log_timestamp;
#define BITS_PER_BYTE 8
#define BITS_PER_LONG (BITS_PER_BYTE * sizeof(long))
#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
/* ARRAY_SIZE and min/max macros stolen from linux/kernel.h */
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#define min(x, y) ({ \
typeof(x) _min1 = (x); \
typeof(y) _min2 = (y); \
(void) (&_min1 == &_min2); \
_min1 < _min2 ? _min1 : _min2; })
#define max(x, y) ({ \
typeof(x) _max1 = (x); \
typeof(y) _max2 = (y); \
(void) (&_max1 == &_max2); \
_max1 > _max2 ? _max1 : _max2; })
#define min_t(type, x, y) ({ \
type __min1 = (x); \
type __min2 = (y); \
__min1 < __min2 ? __min1: __min2; })
#define max_t(type, x, y) ({ \
type __max1 = (x); \
type __max2 = (y); \
__max1 > __max2 ? __max1: __max2; })
void log_msg(int severity, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
#define fatal(fmt, args...) do { \
log_msg(OSSP_LOG_CRIT, fmt , ##args); \
_exit(1); \
} while (0)
#define err(fmt, args...) log_msg(OSSP_LOG_ERR, fmt , ##args)
#define warn(fmt, args...) log_msg(OSSP_LOG_WARN, fmt , ##args)
#define info(fmt, args...) log_msg(OSSP_LOG_INFO, fmt , ##args)
#define dbg0(fmt, args...) log_msg(OSSP_LOG_DBG0, fmt , ##args)
#define dbg1(fmt, args...) log_msg(OSSP_LOG_DBG1, fmt , ##args)
#define fatal_e(e, fmt, args...) \
fatal(fmt" (%s)" , ##args, strerror(-(e)))
#define err_e(e, fmt, args...) \
err(fmt" (%s)" , ##args, strerror(-(e)))
#define warn_e(e, fmt, args...) \
warn(fmt" (%s)" , ##args, strerror(-(e)))
#define info_e(e, fmt, args...) \
info(fmt" (%s)" , ##args, strerror(-(e)))
#define dbg0_e(e, fmt, args...) \
dbg0(fmt" (%s)" , ##args, strerror(-(e)))
#define dbg1_e(e, fmt, args...) \
dbg1(fmt" (%s)" , ##args, strerror(-(e)))
struct ring_buf {
char *buf;
size_t size;
size_t head;
size_t bytes;
};
static inline size_t ring_size(struct ring_buf *ring)
{
return ring->size;
}
static inline size_t ring_bytes(struct ring_buf *ring)
{
return ring->bytes;
}
static inline size_t ring_space(struct ring_buf *ring)
{
return ring->size - ring->bytes;
}
static inline void ring_consume(struct ring_buf *ring, size_t size)
{
assert(ring->bytes >= size);
ring->bytes -= size;
}
static inline void ring_manual_init(struct ring_buf *ring, void *buf,
size_t size, size_t head, size_t bytes)
{
ring->buf = buf;
ring->size = size;
ring->head = head;
ring->bytes = bytes;
}
void ring_fill(struct ring_buf *ring, const void *buf, size_t size);
void *ring_data(struct ring_buf *ring, size_t *sizep);
int ring_resize(struct ring_buf *ring, size_t new_size);
struct sized_buf {
char *buf;
size_t size;
};
int ensure_sbuf_size(struct sized_buf *sbuf, size_t size);
int read_fill(int fd, void *buf, size_t size);
int write_fill(int fd, const void *buf, size_t size);
/*
* Bitops lifted from linux asm-generic implementation.
*/
unsigned long find_next_zero_bit(const unsigned long *addr, unsigned
long size, unsigned long offset);
#define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0)
extern void __set_bit(int nr, volatile unsigned long *addr);
extern void __clear_bit(int nr, volatile unsigned long *addr);
typedef ssize_t (*ossp_action_fn_t)(enum ossp_opcode opcode,
void *carg, void *din, size_t din_sz,
void *rarg, void *dout, size_t *dout_szp,
int fd);
int get_proc_self_info(pid_t tid, pid_t *pgrp,
char *cmd_buf, size_t cmd_buf_sz);
/*
* Doubly linked list handling code shamelessly stolen from the Linux
* kernel 2.6.26 include/linux/list.h.
*/
/**
* container_of - cast a member of a structure out to the containing structure
* @ptr: the pointer to the member.
* @type: the type of the container struct this is embedded in.
* @member: the name of the member within the struct.
*
*/
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
#define LIST_POISON1 ((void *) 0x00100100)
#define LIST_POISON2 ((void *) 0x00200200)
/*
* Simple doubly linked list implementation.
*
* Some of the internal functions ("__xxx") are useful when
* manipulating whole lists rather than single entries, as
* sometimes we already know the next/prev entries and we can
* generate better code by using them directly rather than
* using the generic single-entry routines.
*/
struct list_head {
struct list_head *next, *prev;
};
#define LIST_HEAD_INIT(name) { &(name), &(name) }
#define LIST_HEAD(name) \
struct list_head name = LIST_HEAD_INIT(name)
static inline void INIT_LIST_HEAD(struct list_head *list)
{
list->next = list;
list->prev = list;
}
/*
* Insert a new entry between two known consecutive entries.
*
* This is only for internal list manipulation where we know
* the prev/next entries already!
*/
static inline void __list_add(struct list_head *new,
struct list_head *prev,
struct list_head *next)
{
next->prev = new;
new->next = next;
new->prev = prev;
prev->next = new;
}
/**
* list_add - add a new entry
* @new: new entry to be added
* @head: list head to add it after
*
* Insert a new entry after the specified head.
* This is good for implementing stacks.
*/
static inline void list_add(struct list_head *new, struct list_head *head)
{
__list_add(new, head, head->next);
}
/**
* list_add_tail - add a new entry
* @new: new entry to be added
* @head: list head to add it before
*
* Insert a new entry before the specified head.
* This is useful for implementing queues.
*/
static inline void list_add_tail(struct list_head *new, struct list_head *head)
{
__list_add(new, head->prev, head);
}
/*
* Delete a list entry by making the prev/next entries
* point to each other.
*
* This is only for internal list manipulation where we know
* the prev/next entries already!
*/
static inline void __list_del(struct list_head * prev, struct list_head * next)
{
next->prev = prev;
prev->next = next;
}
/**
* list_del - deletes entry from list.
* @entry: the element to delete from the list.
* Note: list_empty() on entry does not return true after this, the entry is
* in an undefined state.
*/
static inline void list_del(struct list_head *entry)
{
__list_del(entry->prev, entry->next);
entry->next = LIST_POISON1;
entry->prev = LIST_POISON2;
}
/**
* list_replace - replace old entry by new one
* @old : the element to be replaced
* @new : the new element to insert
*
* If @old was empty, it will be overwritten.
*/
static inline void list_replace(struct list_head *old,
struct list_head *new)
{
new->next = old->next;
new->next->prev = new;
new->prev = old->prev;
new->prev->next = new;
}
static inline void list_replace_init(struct list_head *old,
struct list_head *new)
{
list_replace(old, new);
INIT_LIST_HEAD(old);
}
/**
* list_del_init - deletes entry from list and reinitialize it.
* @entry: the element to delete from the list.
*/
static inline void list_del_init(struct list_head *entry)
{
__list_del(entry->prev, entry->next);
INIT_LIST_HEAD(entry);
}
/**
* list_move - delete from one list and add as another's head
* @list: the entry to move
* @head: the head that will precede our entry
*/
static inline void list_move(struct list_head *list, struct list_head *head)
{
__list_del(list->prev, list->next);
list_add(list, head);
}
/**
* list_move_tail - delete from one list and add as another's tail
* @list: the entry to move
* @head: the head that will follow our entry
*/
static inline void list_move_tail(struct list_head *list,
struct list_head *head)
{
__list_del(list->prev, list->next);
list_add_tail(list, head);
}
/**
* list_is_last - tests whether @list is the last entry in list @head
* @list: the entry to test
* @head: the head of the list
*/
static inline int list_is_last(const struct list_head *list,
const struct list_head *head)
{
return list->next == head;
}
/**
* list_empty - tests whether a list is empty
* @head: the list to test.
*/
static inline int list_empty(const struct list_head *head)
{
return head->next == head;
}
/**
* list_empty_careful - tests whether a list is empty and not being modified
* @head: the list to test
*
* Description:
* tests whether a list is empty _and_ checks that no other CPU might be
* in the process of modifying either member (next or prev)
*
* NOTE: using list_empty_careful() without synchronization
* can only be safe if the only activity that can happen
* to the list entry is list_del_init(). Eg. it cannot be used
* if another CPU could re-list_add() it.
*/
static inline int list_empty_careful(const struct list_head *head)
{
struct list_head *next = head->next;
return (next == head) && (next == head->prev);
}
/**
* list_is_singular - tests whether a list has just one entry.
* @head: the list to test.
*/
static inline int list_is_singular(const struct list_head *head)
{
return !list_empty(head) && (head->next == head->prev);
}
static inline void __list_splice(const struct list_head *list,
struct list_head *head)
{
struct list_head *first = list->next;
struct list_head *last = list->prev;
struct list_head *at = head->next;
first->prev = head;
head->next = first;
last->next = at;
at->prev = last;
}
/**
* list_splice - join two lists
* @list: the new list to add.
* @head: the place to add it in the first list.
*/
static inline void list_splice(const struct list_head *list,
struct list_head *head)
{
if (!list_empty(list))
__list_splice(list, head);
}
/**
* list_splice_init - join two lists and reinitialise the emptied list.
* @list: the new list to add.
* @head: the place to add it in the first list.
*
* The list at @list is reinitialised
*/
static inline void list_splice_init(struct list_head *list,
struct list_head *head)
{
if (!list_empty(list)) {
__list_splice(list, head);
INIT_LIST_HEAD(list);
}
}
/**
* list_entry - get the struct for this entry
* @ptr: the &struct list_head pointer.
* @type: the type of the struct this is embedded in.
* @member: the name of the list_struct within the struct.
*/
#define list_entry(ptr, type, member) \
container_of(ptr, type, member)
/**
* list_first_entry - get the first element from a list
* @ptr: the list head to take the element from.
* @type: the type of the struct this is embedded in.
* @member: the name of the list_struct within the struct.
*
* Note, that list is expected to be not empty.
*/
#define list_first_entry(ptr, type, member) \
list_entry((ptr)->next, type, member)
/**
* list_for_each - iterate over a list
* @pos: the &struct list_head to use as a loop cursor.
* @head: the head for your list.
*/
#define list_for_each(pos, head) \
for (pos = (head)->next; pos != (head); pos = pos->next)
/**
* list_for_each_prev - iterate over a list backwards
* @pos: the &struct list_head to use as a loop cursor.
* @head: the head for your list.
*/
#define list_for_each_prev(pos, head) \
for (pos = (head)->prev; pos != (head); pos = pos->prev)
/**
* list_for_each_safe - iterate over a list safe against removal of list entry
* @pos: the &struct list_head to use as a loop cursor.
* @n: another &struct list_head to use as temporary storage
* @head: the head for your list.
*/
#define list_for_each_safe(pos, n, head) \
for (pos = (head)->next, n = pos->next; pos != (head); \
pos = n, n = pos->next)
/**
* list_for_each_prev_safe - iterate over a list backwards safe against removal of list entry
* @pos: the &struct list_head to use as a loop cursor.
* @n: another &struct list_head to use as temporary storage
* @head: the head for your list.
*/
#define list_for_each_prev_safe(pos, n, head) \
for (pos = (head)->prev, n = pos->prev; \
pos != (head); pos = n, n = pos->prev)
/**
* list_for_each_entry - iterate over list of given type
* @pos: the type * to use as a loop cursor.
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*/
#define list_for_each_entry(pos, head, member) \
for (pos = list_entry((head)->next, typeof(*pos), member); \
&pos->member != (head); \
pos = list_entry(pos->member.next, typeof(*pos), member))
/**
* list_for_each_entry_reverse - iterate backwards over list of given type.
* @pos: the type * to use as a loop cursor.
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*/
#define list_for_each_entry_reverse(pos, head, member) \
for (pos = list_entry((head)->prev, typeof(*pos), member); \
&pos->member != (head); \
pos = list_entry(pos->member.prev, typeof(*pos), member))
/**
* list_prepare_entry - prepare a pos entry for use in list_for_each_entry_continue()
* @pos: the type * to use as a start point
* @head: the head of the list
* @member: the name of the list_struct within the struct.
*
* Prepares a pos entry for use as a start point in list_for_each_entry_continue().
*/
#define list_prepare_entry(pos, head, member) \
((pos) ? : list_entry(head, typeof(*pos), member))
/**
* list_for_each_entry_continue - continue iteration over list of given type
* @pos: the type * to use as a loop cursor.
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*
* Continue to iterate over list of given type, continuing after
* the current position.
*/
#define list_for_each_entry_continue(pos, head, member) \
for (pos = list_entry(pos->member.next, typeof(*pos), member); \
&pos->member != (head); \
pos = list_entry(pos->member.next, typeof(*pos), member))
/**
* list_for_each_entry_continue_reverse - iterate backwards from the given point
* @pos: the type * to use as a loop cursor.
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*
* Start to iterate over list of given type backwards, continuing after
* the current position.
*/
#define list_for_each_entry_continue_reverse(pos, head, member) \
for (pos = list_entry(pos->member.prev, typeof(*pos), member); \
&pos->member != (head); \
pos = list_entry(pos->member.prev, typeof(*pos), member))
/**
* list_for_each_entry_from - iterate over list of given type from the current point
* @pos: the type * to use as a loop cursor.
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*
* Iterate over list of given type, continuing from current position.
*/
#define list_for_each_entry_from(pos, head, member) \
for (; &pos->member != (head); \
pos = list_entry(pos->member.next, typeof(*pos), member))
/**
* list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
* @pos: the type * to use as a loop cursor.
* @n: another type * to use as temporary storage
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*/
#define list_for_each_entry_safe(pos, n, head, member) \
for (pos = list_entry((head)->next, typeof(*pos), member), \
n = list_entry(pos->member.next, typeof(*pos), member); \
&pos->member != (head); \
pos = n, n = list_entry(n->member.next, typeof(*n), member))
/**
* list_for_each_entry_safe_continue
* @pos: the type * to use as a loop cursor.
* @n: another type * to use as temporary storage
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*
* Iterate over list of given type, continuing after current point,
* safe against removal of list entry.
*/
#define list_for_each_entry_safe_continue(pos, n, head, member) \
for (pos = list_entry(pos->member.next, typeof(*pos), member), \
n = list_entry(pos->member.next, typeof(*pos), member); \
&pos->member != (head); \
pos = n, n = list_entry(n->member.next, typeof(*n), member))
/**
* list_for_each_entry_safe_from
* @pos: the type * to use as a loop cursor.
* @n: another type * to use as temporary storage
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*
* Iterate over list of given type from current point, safe against
* removal of list entry.
*/
#define list_for_each_entry_safe_from(pos, n, head, member) \
for (n = list_entry(pos->member.next, typeof(*pos), member); \
&pos->member != (head); \
pos = n, n = list_entry(n->member.next, typeof(*n), member))
/**
* list_for_each_entry_safe_reverse
* @pos: the type * to use as a loop cursor.
* @n: another type * to use as temporary storage
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*
* Iterate backwards over list of given type, safe against removal
* of list entry.
*/
#define list_for_each_entry_safe_reverse(pos, n, head, member) \
for (pos = list_entry((head)->prev, typeof(*pos), member), \
n = list_entry(pos->member.prev, typeof(*pos), member); \
&pos->member != (head); \
pos = n, n = list_entry(n->member.prev, typeof(*n), member))
#endif /*_OSSP_UTIL_H*/
src/mod/endpoints/mod_skypopen/osscuse/ossp.c 0 → 100644
浏览文件 @ 599a2005
/*
* ossp - OSS Proxy: emulate OSS device using CUSE
*
* Copyright (C) 2008-2010 SUSE Linux Products GmbH
* Copyright (C) 2008-2010 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/
#include "ossp.h"
const struct ossp_arg_size ossp_arg_sizes[OSSP_NR_OPCODES] = {
[OSSP_MIXER] = { sizeof(struct ossp_mixer_arg),
sizeof(struct ossp_mixer_arg), 0 },
[OSSP_DSP_OPEN] = { sizeof(struct ossp_dsp_open_arg), 0, 0 },
[OSSP_DSP_READ] = { sizeof(struct ossp_dsp_rw_arg), 0, 0 },
[OSSP_DSP_WRITE] = { sizeof(struct ossp_dsp_rw_arg), 0, 0 },
[OSSP_DSP_POLL] = { sizeof(int), sizeof(unsigned), 0 },
[OSSP_DSP_MMAP] = { sizeof(struct ossp_dsp_mmap_arg), 0, 0 },
[OSSP_DSP_MUNMAP] = { sizeof(int), 0, 0 },
[OSSP_DSP_RESET] = { 0, 0, 0 },
[OSSP_DSP_SYNC] = { 0, 0, 0 },
[OSSP_DSP_POST] = { 0, 0, 0 },
[OSSP_DSP_GET_RATE] = { 0, sizeof(int), 0 },
[OSSP_DSP_GET_CHANNELS] = { 0, sizeof(int), 0 },
[OSSP_DSP_GET_FORMAT] = { 0, sizeof(int), 0 },
[OSSP_DSP_GET_BLKSIZE] = { 0, sizeof(int), 0 },
[OSSP_DSP_GET_FORMATS] = { 0, sizeof(int), 0 },
[OSSP_DSP_SET_RATE] = { sizeof(int), sizeof(int), 0 },
[OSSP_DSP_SET_CHANNELS] = { sizeof(int), sizeof(int), 0 },
[OSSP_DSP_SET_FORMAT] = { sizeof(int), sizeof(int), 0 },
[OSSP_DSP_SET_SUBDIVISION] = { sizeof(int), sizeof(int), 0 },
[OSSP_DSP_SET_FRAGMENT] = { sizeof(int), 0, 0 },
[OSSP_DSP_GET_TRIGGER] = { 0, sizeof(int), 0 },
[OSSP_DSP_SET_TRIGGER] = { sizeof(int), 0, 0 },
[OSSP_DSP_GET_OSPACE] = { 0, sizeof(struct audio_buf_info), 0 },
[OSSP_DSP_GET_ISPACE] = { 0, sizeof(struct audio_buf_info), 0 },
[OSSP_DSP_GET_OPTR] = { 0, sizeof(struct count_info), 0 },
[OSSP_DSP_GET_IPTR] = { 0, sizeof(struct count_info), 0 },
[OSSP_DSP_GET_ODELAY] = { 0, sizeof(int), 0 },
};
const char *ossp_cmd_str[OSSP_NR_OPCODES] = {
[OSSP_MIXER] = "MIXER",
[OSSP_DSP_OPEN] = "OPEN",
[OSSP_DSP_READ] = "READ",
[OSSP_DSP_WRITE] = "WRITE",
[OSSP_DSP_POLL] = "POLL",
[OSSP_DSP_MMAP] = "MMAP",
[OSSP_DSP_MUNMAP] = "MUNMAP",
[OSSP_DSP_RESET] = "RESET",
[OSSP_DSP_SYNC] = "SYNC",
[OSSP_DSP_POST] = "POST",
[OSSP_DSP_GET_RATE] = "GET_RATE",
[OSSP_DSP_GET_CHANNELS] = "GET_CHANNELS",
[OSSP_DSP_GET_FORMAT] = "GET_FORMAT",
[OSSP_DSP_GET_BLKSIZE] = "GET_BLKSIZE",
[OSSP_DSP_GET_FORMATS] = "GET_FORMATS",
[OSSP_DSP_SET_RATE] = "SET_RATE",
[OSSP_DSP_SET_CHANNELS] = "SET_CHANNELS",
[OSSP_DSP_SET_FORMAT] = "SET_FORMAT",
[OSSP_DSP_SET_SUBDIVISION] = "SET_BUSDIVISION",
[OSSP_DSP_SET_FRAGMENT] = "SET_FRAGMENT",
[OSSP_DSP_GET_TRIGGER] = "GET_TRIGGER",
[OSSP_DSP_SET_TRIGGER] = "SET_TRIGGER",
[OSSP_DSP_GET_OSPACE] = "GET_OSPACE",
[OSSP_DSP_GET_ISPACE] = "GET_ISPACE",
[OSSP_DSP_GET_OPTR] = "GET_OPTR",
[OSSP_DSP_GET_IPTR] = "GET_IPTR",
[OSSP_DSP_GET_ODELAY] = "GET_ODELAY",
};
const char *ossp_notify_str[OSSP_NR_NOTIFY_OPCODES] = {
[OSSP_NOTIFY_POLL] = "POLL",
[OSSP_NOTIFY_OBITUARY] = "OBITUARY",
[OSSP_NOTIFY_VOLCHG] = "VOLCHG",
};
src/mod/endpoints/mod_skypopen/osscuse/ossp.h 0 → 100644
浏览文件 @ 599a2005
/*
* ossp - OSS Proxy: emulate OSS device using CUSE
*
* Copyright (C) 2008-2010 SUSE Linux Products GmbH
* Copyright (C) 2008-2010 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/
#ifndef _OSSP_H
#define _OSSP_H
#include <sys/types.h>
#include <inttypes.h>
#include <sys/soundcard.h>
#define OSSP_VERSION "1.3.2"
#define OSSP_CMD_MAGIC 0xdeadbeef
#define OSSP_REPLY_MAGIC 0xbeefdead
#define OSSP_NOTIFY_MAGIC 0xbebebebe
#define PLAY 0
#define REC 1
#define LEFT 0
#define RIGHT 1
enum ossp_opcode {
OSSP_MIXER,
OSSP_DSP_OPEN,
OSSP_DSP_READ,
OSSP_DSP_WRITE,
OSSP_DSP_POLL,
OSSP_DSP_MMAP,
OSSP_DSP_MUNMAP,
OSSP_DSP_RESET,
OSSP_DSP_SYNC,
OSSP_DSP_POST,
OSSP_DSP_GET_RATE,
OSSP_DSP_GET_CHANNELS,
OSSP_DSP_GET_FORMAT,
OSSP_DSP_GET_BLKSIZE,
OSSP_DSP_GET_FORMATS,
OSSP_DSP_SET_RATE,
OSSP_DSP_SET_CHANNELS,
OSSP_DSP_SET_FORMAT,
OSSP_DSP_SET_SUBDIVISION,
OSSP_DSP_SET_FRAGMENT,
OSSP_DSP_GET_TRIGGER,
OSSP_DSP_SET_TRIGGER,
OSSP_DSP_GET_OSPACE,
OSSP_DSP_GET_ISPACE,
OSSP_DSP_GET_OPTR,
OSSP_DSP_GET_IPTR,
OSSP_DSP_GET_ODELAY,
OSSP_NR_OPCODES,
};
enum ossp_notify_opcode {
OSSP_NOTIFY_POLL,
OSSP_NOTIFY_OBITUARY,
OSSP_NOTIFY_VOLCHG,
OSSP_NR_NOTIFY_OPCODES,
};
struct ossp_mixer_arg {
int vol[2][2];
};
struct ossp_dsp_open_arg {
int flags;
pid_t opener_pid;
};
struct ossp_dsp_rw_arg {
unsigned nonblock:1;
};
struct ossp_dsp_mmap_arg {
int dir;
size_t size;
};
struct ossp_cmd {
unsigned magic;
enum ossp_opcode opcode;
size_t din_size;
size_t dout_size;
};
struct ossp_reply {
unsigned magic;
int result;
size_t dout_size; /* <= cmd.data_in_size */
};
struct ossp_notify {
unsigned magic;
enum ossp_notify_opcode opcode;
};
struct ossp_arg_size {
ssize_t carg_size;
ssize_t rarg_size;
unsigned has_fd:1;
};
extern const struct ossp_arg_size ossp_arg_sizes[OSSP_NR_OPCODES];
extern const char *ossp_cmd_str[OSSP_NR_OPCODES];
extern const char *ossp_notify_str[OSSP_NR_NOTIFY_OPCODES];
#endif /* _OSSP_H */
src/mod/endpoints/mod_skypopen/osscuse/osspd.c 0 → 100644
浏览文件 @ 599a2005
/*
* osspd - OSS Proxy Daemon: emulate OSS device using CUSE
*
* Copyright (C) 2008-2010 SUSE Linux Products GmbH
* Copyright (C) 2008-2010 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/
#undef GIOVANNI
#define FUSE_USE_VERSION 28
#define _GNU_SOURCE
#include <assert.h>
#include <cuse_lowlevel.h>
#include <fcntl.h>
#include <fuse_opt.h>
#include <libgen.h>
#include <limits.h>
#include <pthread.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/epoll.h>
#include <sys/socket.h>
#include <sys/soundcard.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <unistd.h>
#include "ossp.h"
#include "ossp-util.h"
/*
* MMAP support needs to be updated to the new fuse MMAP API. Disable
* it for the time being.
*/
#warning mmap support disabled for now
/* #define OSSP_MMAP */
#define DFL_MIXER_NAME "mixer"
#define DFL_DSP_NAME "dsp"
#define DFL_ADSP_NAME "adsp"
#define STRFMT "S[%u/%d]"
#define STRID(os) os->id, os->pid
#define dbg1_os(os, fmt, args...) dbg1(STRFMT" "fmt, STRID(os) , ##args)
#define dbg0_os(os, fmt, args...) dbg0(STRFMT" "fmt, STRID(os) , ##args)
#define warn_os(os, fmt, args...) warn(STRFMT" "fmt, STRID(os) , ##args)
#define err_os(os, fmt, args...) err(STRFMT" "fmt, STRID(os) , ##args)
#define warn_ose(os, err, fmt, args...) \
warn_e(err, STRFMT" "fmt, STRID(os) , ##args)
#define err_ose(os, err, fmt, args...) \
err_e(err, STRFMT" "fmt, STRID(os) , ##args)
enum {
SNDRV_OSS_VERSION = ((3<<16)|(8<<8)|(1<<4)|(0)), /* 3.8.1a */
DFL_MIXER_MAJOR = 14,
DFL_MIXER_MINOR = 0,
DFL_DSP_MAJOR = 14,
DFL_DSP_MINOR = 3,
DFL_ADSP_MAJOR = 14,
DFL_ADSP_MINOR = 12,
DFL_MAX_STREAMS = 128,
MIXER_PUT_DELAY = 600, /* 10 mins */
/* DSPS_MMAP_SIZE / 2 must be multiple of SHMLBA */
DSPS_MMAP_SIZE = 2 * (512 << 10), /* 512k for each dir */
};
struct ossp_uid_cnt {
struct list_head link;
uid_t uid;
unsigned nr_os;
};
struct ossp_mixer {
pid_t pgrp;
struct list_head link;
struct list_head delayed_put_link;
unsigned refcnt;
/* the following two fields are protected by mixer_mutex */
int vol[2][2];
int modify_counter;
time_t put_expires;
};
struct ossp_mixer_cmd {
struct ossp_mixer *mixer;
struct ossp_mixer_arg set;
int out_dir;
int rvol;
};
#define for_each_vol(i, j) \
for (i = 0, j = 0; i < 2; j += i << 1, j++, i = j >> 1, j &= 1)
struct ossp_stream {
unsigned id; /* stream ID */
struct list_head link;
struct list_head pgrp_link;
struct list_head notify_link;
unsigned refcnt;
pthread_mutex_t cmd_mutex;
pthread_mutex_t mmap_mutex;
struct fuse_pollhandle *ph;
/* stream owner info */
pid_t pid;
pid_t pgrp;
uid_t uid;
gid_t gid;
/* slave info */
pid_t slave_pid;
int cmd_fd;
int notify_tx;
int notify_rx;
/* the following dead flag is set asynchronously, keep it separate. */
int dead;
/* stream mixer state, protected by mixer_mutex */
int mixer_pending;
int vol[2][2];
int vol_set[2][2];
off_t mmap_off;
size_t mmap_size;
struct ossp_uid_cnt *ucnt;
struct fuse_session *se; /* associated fuse session */
struct ossp_mixer *mixer;
};
struct ossp_dsp_stream {
struct ossp_stream os;
unsigned rw;
unsigned mmapped;
int nonblock;
};
#define os_to_dsps(_os) container_of(_os, struct ossp_dsp_stream, os)
static unsigned max_streams;
static unsigned umax_streams;
static unsigned hashtbl_size;
static char dsp_slave_path[PATH_MAX];
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_mutex_t mixer_mutex = PTHREAD_MUTEX_INITIALIZER;
static unsigned long *os_id_bitmap;
static unsigned nr_mixers;
static struct list_head *mixer_tbl; /* indexed by PGRP */
static struct list_head *os_tbl; /* indexed by ID */
static struct list_head *os_pgrp_tbl; /* indexed by PGRP */
static struct list_head *os_notify_tbl; /* indexed by notify fd */
static LIST_HEAD(uid_cnt_list);
static int notify_epfd; /* epoll used to monitor notify fds */
static pthread_t notify_poller_thread;
static pthread_t slave_reaper_thread;
static pthread_t mixer_delayed_put_thread;
static pthread_t cuse_mixer_thread;
static pthread_t cuse_adsp_thread;
static pthread_cond_t notify_poller_kill_wait = PTHREAD_COND_INITIALIZER;
static pthread_cond_t slave_reaper_wait = PTHREAD_COND_INITIALIZER;
static LIST_HEAD(slave_corpse_list);
static LIST_HEAD(mixer_delayed_put_head); /* delayed reference */
static pthread_cond_t mixer_delayed_put_cond = PTHREAD_COND_INITIALIZER;
static int init_wait_fd = -1;
static int exit_on_idle;
static struct fuse_session *mixer_se;
static struct fuse_session *dsp_se;
static struct fuse_session *adsp_se;
static void put_os(struct ossp_stream *os);
/***************************************************************************
* Accessors
*/
static struct list_head *mixer_tbl_head(pid_t pid)
{
return &mixer_tbl[pid % hashtbl_size];
}
static struct list_head *os_tbl_head(uint64_t id)
{
return &os_tbl[id % hashtbl_size];
}
static struct list_head *os_pgrp_tbl_head(pid_t pgrp)
{
return &os_pgrp_tbl[pgrp % hashtbl_size];
}
static struct list_head *os_notify_tbl_head(int notify_rx)
{
return &os_notify_tbl[notify_rx % hashtbl_size];
}
static struct ossp_mixer *find_mixer_locked(pid_t pgrp)
{
struct ossp_mixer *mixer;
list_for_each_entry(mixer, mixer_tbl_head(pgrp), link)
if (mixer->pgrp == pgrp)
return mixer;
return NULL;
}
static struct ossp_mixer *find_mixer(pid_t pgrp)
{
struct ossp_mixer *mixer;
pthread_mutex_lock(&mutex);
mixer = find_mixer_locked(pgrp);
pthread_mutex_unlock(&mutex);
return mixer;
}
static struct ossp_stream *find_os(unsigned id)
{
struct ossp_stream *os, *found = NULL;
pthread_mutex_lock(&mutex);
list_for_each_entry(os, os_tbl_head(id), link)
if (os->id == id) {
found = os;
break;
}
pthread_mutex_unlock(&mutex);
return found;
}
static struct ossp_stream *find_os_by_notify_rx(int notify_rx)
{
struct ossp_stream *os, *found = NULL;
pthread_mutex_lock(&mutex);
list_for_each_entry(os, os_notify_tbl_head(notify_rx), notify_link)
if (os->notify_rx == notify_rx) {
found = os;
break;
}
pthread_mutex_unlock(&mutex);
return found;
}
/***************************************************************************
* Command and ioctl helpers
*/
static ssize_t exec_cmd_intern(struct ossp_stream *os, enum ossp_opcode opcode,
const void *carg, size_t carg_size, const void *din, size_t din_size,
void *rarg, size_t rarg_size, void *dout, size_t *dout_sizep, int fd)
{
size_t dout_size = dout_sizep ? *dout_sizep : 0;
struct ossp_cmd cmd = { .magic = OSSP_CMD_MAGIC, .opcode = opcode,
.din_size = din_size,
.dout_size = dout_size };
struct iovec iov = { &cmd, sizeof(cmd) };
struct msghdr msg = { .msg_iov = &iov, .msg_iovlen = 1 };
struct ossp_reply reply = { };
char cmsg_buf[CMSG_SPACE(sizeof(fd))];
char reason[512];
int rc;
if (os->dead)
return -EIO;
//dbg1_os(os, "opcode %s=%d carg=%zu din=%zu rarg=%zu dout=%zu",
//ossp_cmd_str[opcode], opcode, carg_size, din_size, rarg_size,
//dout_size);
#ifndef GIOVANNI
memset(dout, 255, dout_size);
memset(din, 255, din_size);
#define GIOVA_BLK 3840
#define GIOVA_SLEEP 40000
switch(opcode){
case 1: //OPEN
reply.result = 0;
break;
case 2: //READ
usleep((GIOVA_SLEEP/GIOVA_BLK)* *dout_sizep);
reply.result = *dout_sizep;
break;
case 3: //WRITE
usleep((GIOVA_SLEEP/GIOVA_BLK)* din_size);
reply.result = din_size;
break;
case 9: //POST
reply.result = -32;
break;
case 13: //GET_BLKSIZE
reply.result = 0;
*(int *)rarg = GIOVA_BLK;
break;
case 14: //GET_FORMATS
reply.result = 0;
*(int *)rarg = 28731;
break;
case 15: //SET_RATE
reply.result = 0;
*(int *)rarg = *(int *) carg;
break;
case 16: //SET_CHANNELS
reply.result = 0;
*(int *)rarg = *(int *) carg;
break;
case 17: //SET_FORMAT
reply.result = 0;
*(int *)rarg = *(int *) carg;
break;
case 19: //SET_FRAGMENT
reply.result = 0;
break;
default:
reply.result = 0;
break;
}
#endif // GIOVANNI
#ifdef GIOVANNI
if (fd >= 0) {
struct cmsghdr *cmsg;
msg.msg_control = cmsg_buf;
msg.msg_controllen = sizeof(cmsg_buf);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
*(int *)CMSG_DATA(cmsg) = fd;
msg.msg_controllen = cmsg->cmsg_len;
}
if (sendmsg(os->cmd_fd, &msg, 0) <= 0) {
rc = -errno;
snprintf(reason, sizeof(reason), "command sendmsg failed: %s",
strerror(-rc));
goto fail;
}
if ((rc = write_fill(os->cmd_fd, carg, carg_size)) < 0 ||
(rc = write_fill(os->cmd_fd, din, din_size)) < 0) {
snprintf(reason, sizeof(reason),
"can't tranfer command argument and/or data: %s",
strerror(-rc));
goto fail;
}
if ((rc = read_fill(os->cmd_fd, &reply, sizeof(reply))) < 0) {
snprintf(reason, sizeof(reason), "can't read reply: %s",
strerror(-rc));
goto fail;
}
if (reply.magic != OSSP_REPLY_MAGIC) {
snprintf(reason, sizeof(reason),
"reply magic mismatch %x != %x",
reply.magic, OSSP_REPLY_MAGIC);
rc = -EINVAL;
goto fail;
}
if (reply.result < 0)
goto out_unlock;
if (reply.dout_size > dout_size) {
snprintf(reason, sizeof(reason),
"data out size overflow %zu > %zu",
reply.dout_size, dout_size);
rc = -EINVAL;
goto fail;
}
dout_size = reply.dout_size;
if (dout_sizep)
*dout_sizep = dout_size;
if ((rc = read_fill(os->cmd_fd, rarg, rarg_size)) < 0 ||
(rc = read_fill(os->cmd_fd, dout, dout_size)) < 0) {
snprintf(reason, sizeof(reason), "can't read data out: %s",
strerror(-rc));
goto fail;
}
#endif // GIOVANNI
out_unlock:
//dbg1_os(os, " completed, result=%d dout=%zu",
//reply.result, dout_size);
//if(rarg)
//dbg1_os(os, " 2 %s=%d completed, result=%d dout=%zu carg=%d rarg=%d", ossp_cmd_str[opcode], opcode,
//reply.result, dout_size, carg ? *(int *) carg : 666, *(int *)rarg);
return reply.result;
fail:
warn_os(os, "communication with slave failed (%s)", reason);
os->dead = 1;
return rc;
}
static ssize_t exec_cmd(struct ossp_stream *os, enum ossp_opcode opcode,
const void *carg, size_t carg_size, const void *din, size_t din_size,
void *rarg, size_t rarg_size, void *dout, size_t *dout_sizep, int fd)
{
int is_mixer;
int i, j;
ssize_t ret, mret;
/* mixer command is handled exlicitly below */
is_mixer = opcode == OSSP_MIXER;
if (is_mixer) {
ret = -pthread_mutex_trylock(&os->cmd_mutex);
if (ret)
return ret;
} else {
pthread_mutex_lock(&os->cmd_mutex);
ret = exec_cmd_intern(os, opcode, carg, carg_size,
din, din_size, rarg, rarg_size,
dout, dout_sizep, fd);
}
/* lazy mixer handling */
pthread_mutex_lock(&mixer_mutex);
if (os->mixer_pending) {
struct ossp_mixer_arg marg;
repeat_mixer:
/* we have mixer command pending */
memcpy(marg.vol, os->vol_set, sizeof(os->vol_set));
memset(os->vol_set, -1, sizeof(os->vol_set));
pthread_mutex_unlock(&mixer_mutex);
mret = exec_cmd_intern(os, OSSP_MIXER, &marg, sizeof(marg),
NULL, 0, &marg, sizeof(marg), NULL, NULL,
-1);
pthread_mutex_lock(&mixer_mutex);
/* was there mixer set request while executing mixer command? */
for_each_vol(i, j)
if (os->vol_set[i][j] >= 0)
goto repeat_mixer;
/* update internal mixer state */
if (mret == 0) {
for_each_vol(i, j) {
if (marg.vol[i][j] >= 0) {
if (os->vol[i][j] != marg.vol[i][j])
os->mixer->modify_counter++;
os->vol[i][j] = marg.vol[i][j];
}
}
}
os->mixer_pending = 0;
}
pthread_mutex_unlock(&os->cmd_mutex);
/*
* mixer mutex must be released after cmd_mutex so that
* exec_mixer_cmd() can guarantee that mixer_pending flags
* will be handled immediately or when the currently
* in-progress command completes.
*/
pthread_mutex_unlock(&mixer_mutex);
return is_mixer ? mret : ret;
}
static ssize_t exec_simple_cmd(struct ossp_stream *os,
enum ossp_opcode opcode, void *carg, void *rarg)
{
return exec_cmd(os, opcode,
carg, ossp_arg_sizes[opcode].carg_size, NULL, 0,
rarg, ossp_arg_sizes[opcode].rarg_size, NULL, NULL, -1);
}
static int ioctl_prep_uarg(fuse_req_t req, void *in, size_t in_sz, void *out,
size_t out_sz, void *uarg, const void *in_buf,
size_t in_bufsz, size_t out_bufsz)
{
struct iovec in_iov = { }, out_iov = { };
int retry = 0;
if (in) {
if (!in_bufsz) {
in_iov.iov_base = uarg;
in_iov.iov_len = in_sz;
retry = 1;
} else {
assert(in_bufsz == in_sz);
memcpy(in, in_buf, in_sz);
}
}
if (out) {
if (!out_bufsz) {
out_iov.iov_base = uarg;
out_iov.iov_len = out_sz;
retry = 1;
} else
assert(out_bufsz == out_sz);
}
if (retry)
fuse_reply_ioctl_retry(req, &in_iov, 1, &out_iov, 1);
return retry;
}
#define PREP_UARG(inp, outp) do { \
if (ioctl_prep_uarg(req, (inp), sizeof(*(inp)), \
(outp), sizeof(*(outp)), uarg, \
in_buf, in_bufsz, out_bufsz)) \
return; \
} while (0)
#define IOCTL_RETURN(result, outp) do { \
if ((outp) != NULL) \
fuse_reply_ioctl(req, result, (outp), sizeof(*(outp))); \
else \
fuse_reply_ioctl(req, result, NULL, 0); \
return; \
} while (0)
/***************************************************************************
* Mixer implementation
*/
static void put_mixer_real(struct ossp_mixer *mixer)
{
if (!--mixer->refcnt) {
dbg0("DESTROY mixer(%d)", mixer->pgrp);
list_del_init(&mixer->link);
list_del_init(&mixer->delayed_put_link);
free(mixer);
nr_mixers--;
/*
* If exit_on_idle, mixer for pgrp0 is touched during
* init and each stream has mixer attached. As mixers
* are destroyed after they have been idle for
* MIXER_PUT_DELAY seconds, we can use it for idle
* detection. Note that this might race with
* concurrent open. The race is inherent.
*/
if (exit_on_idle && !nr_mixers) {
info("idle, exiting");
exit(0);
}
}
}
static struct ossp_mixer *get_mixer(pid_t pgrp)
{
struct ossp_mixer *mixer;
pthread_mutex_lock(&mutex);
/* is there a matching one? */
mixer = find_mixer_locked(pgrp);
if (mixer) {
if (list_empty(&mixer->delayed_put_link))
mixer->refcnt++;
else
list_del_init(&mixer->delayed_put_link);
goto out_unlock;
}
/* reap delayed put list if there are too many mixers */
while (nr_mixers > 2 * max_streams &&
!list_empty(&mixer_delayed_put_head)) {
struct ossp_mixer *mixer =
list_first_entry(&mixer_delayed_put_head,
struct ossp_mixer, delayed_put_link);
assert(mixer->refcnt == 1);
put_mixer_real(mixer);
}
/* create a new one */
mixer = calloc(1, sizeof(*mixer));
if (!mixer) {
warn("failed to allocate mixer for %d", pgrp);
mixer = NULL;
goto out_unlock;
}
mixer->pgrp = pgrp;
INIT_LIST_HEAD(&mixer->link);
INIT_LIST_HEAD(&mixer->delayed_put_link);
mixer->refcnt = 1;
memset(mixer->vol, -1, sizeof(mixer->vol));
list_add(&mixer->link, mixer_tbl_head(pgrp));
nr_mixers++;
dbg0("CREATE mixer(%d)", pgrp);
out_unlock:
pthread_mutex_unlock(&mutex);
return mixer;
}
static void put_mixer(struct ossp_mixer *mixer)
{
pthread_mutex_lock(&mutex);
if (mixer) {
if (mixer->refcnt == 1) {
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
mixer->put_expires = ts.tv_sec + MIXER_PUT_DELAY;
list_add_tail(&mixer->delayed_put_link,
&mixer_delayed_put_head);
pthread_cond_signal(&mixer_delayed_put_cond);
} else
put_mixer_real(mixer);
}
pthread_mutex_unlock(&mutex);
}
static void *mixer_delayed_put_worker(void *arg)
{
struct ossp_mixer *mixer;
struct timespec ts;
time_t now;
pthread_mutex_lock(&mutex);
again:
clock_gettime(CLOCK_REALTIME, &ts);
now = ts.tv_sec;
mixer = NULL;
while (!list_empty(&mixer_delayed_put_head)) {
mixer = list_first_entry(&mixer_delayed_put_head,
struct ossp_mixer, delayed_put_link);
if (now <= mixer->put_expires)
break;
assert(mixer->refcnt == 1);
put_mixer_real(mixer);
mixer = NULL;
}
if (mixer) {
ts.tv_sec = mixer->put_expires + 1;
pthread_cond_timedwait(&mixer_delayed_put_cond, &mutex, &ts);
} else
pthread_cond_wait(&mixer_delayed_put_cond, &mutex);
goto again;
}
static void init_mixer_cmd(struct ossp_mixer_cmd *mxcmd,
struct ossp_mixer *mixer)
{
memset(mxcmd, 0, sizeof(*mxcmd));
memset(&mxcmd->set.vol, -1, sizeof(mxcmd->set.vol));
mxcmd->mixer = mixer;
mxcmd->out_dir = -1;
}
static int exec_mixer_cmd(struct ossp_mixer_cmd *mxcmd, struct ossp_stream *os)
{
int i, j, rc;
/*
* Set pending flags before trying to execute mixer command.
* Combined with lock release order in exec_cmd(), this
* guarantees that the mixer command will be executed
* immediately or when the current command completes.
*/
pthread_mutex_lock(&mixer_mutex);
os->mixer_pending = 1;
for_each_vol(i, j)
if (mxcmd->set.vol[i][j] >= 0)
os->vol_set[i][j] = mxcmd->set.vol[i][j];
pthread_mutex_unlock(&mixer_mutex);
rc = exec_simple_cmd(os, OSSP_MIXER, NULL, NULL);
if (rc >= 0) {
dbg0_os(os, "volume set=%d/%d:%d/%d get=%d/%d:%d/%d",
mxcmd->set.vol[PLAY][LEFT], mxcmd->set.vol[PLAY][RIGHT],
mxcmd->set.vol[REC][LEFT], mxcmd->set.vol[REC][RIGHT],
os->vol[PLAY][LEFT], os->vol[PLAY][RIGHT],
os->vol[REC][LEFT], os->vol[REC][RIGHT]);
} else if (rc != -EBUSY)
warn_ose(os, rc, "mixer command failed");
return rc;
}
static void finish_mixer_cmd(struct ossp_mixer_cmd *mxcmd)
{
struct ossp_mixer *mixer = mxcmd->mixer;
struct ossp_stream *os;
int dir = mxcmd->out_dir;
int vol[2][2] = { };
int cnt[2][2] = { };
int i, j;
pthread_mutex_lock(&mixer_mutex);
/* get volume of all streams attached to this mixer */
pthread_mutex_lock(&mutex);
list_for_each_entry(os, os_pgrp_tbl_head(mixer->pgrp), pgrp_link) {
if (os->pgrp != mixer->pgrp)
continue;
for_each_vol(i, j) {
if (os->vol[i][j] < 0)
continue;
vol[i][j] += os->vol[i][j];
cnt[i][j]++;
}
}
pthread_mutex_unlock(&mutex);
/* calculate the summary volume values */
for_each_vol(i, j) {
if (mxcmd->set.vol[i][j] >= 0)
vol[i][j] = mxcmd->set.vol[i][j];
else if (cnt[i][j])
vol[i][j] = vol[i][j] / cnt[i][j];
else if (mixer->vol[i][j] >= 0)
vol[i][j] = mixer->vol[i][j];
else
vol[i][j] = 100;
vol[i][j] = min(max(0, vol[i][j]), 100);
}
if (dir >= 0)
mxcmd->rvol = vol[dir][LEFT] | (vol[dir][RIGHT] << 8);
pthread_mutex_unlock(&mixer_mutex);
}
static void mixer_simple_ioctl(fuse_req_t req, struct ossp_mixer *mixer,
unsigned cmd, void *uarg, const void *in_buf,
size_t in_bufsz, size_t out_bufsz,
int *not_minep)
{
const char *id = "OSS Proxy", *name = "Mixer";
int i;
switch (cmd) {
case SOUND_MIXER_INFO: {
struct mixer_info info = { };
PREP_UARG(NULL, &info);
strncpy(info.id, id, sizeof(info.id) - 1);
strncpy(info.name, name, sizeof(info.name) - 1);
info.modify_counter = mixer->modify_counter;
IOCTL_RETURN(0, &info);
}
case SOUND_OLD_MIXER_INFO: {
struct _old_mixer_info info = { };
PREP_UARG(NULL, &info);
strncpy(info.id, id, sizeof(info.id) - 1);
strncpy(info.name, name, sizeof(info.name) - 1);
IOCTL_RETURN(0, &info);
}
case OSS_GETVERSION:
i = SNDRV_OSS_VERSION;
goto puti;
case SOUND_MIXER_READ_DEVMASK:
case SOUND_MIXER_READ_STEREODEVS:
i = SOUND_MASK_PCM | SOUND_MASK_IGAIN;
goto puti;
case SOUND_MIXER_READ_CAPS:
i = SOUND_CAP_EXCL_INPUT;
goto puti;
case SOUND_MIXER_READ_RECMASK:
case SOUND_MIXER_READ_RECSRC:
i = SOUND_MASK_IGAIN;
goto puti;
puti:
PREP_UARG(NULL, &i);
IOCTL_RETURN(0, &i);
case SOUND_MIXER_WRITE_RECSRC:
IOCTL_RETURN(0, NULL);
default:
*not_minep = 1;
return;
}
assert(0);
}
static void mixer_do_ioctl(fuse_req_t req, struct ossp_mixer *mixer,
unsigned cmd, void *uarg, const void *in_buf,
size_t in_bufsz, size_t out_bufsz)
{
struct ossp_mixer_cmd mxcmd;
struct ossp_stream *os, **osa;
int not_mine = 0;
int slot = cmd & 0xff, dir;
int nr_os;
int i, rc;
mixer_simple_ioctl(req, mixer, cmd, uarg, in_buf, in_bufsz, out_bufsz,
&not_mine);
if (!not_mine)
return;
rc = -ENXIO;
if (!(cmd & (SIOC_IN | SIOC_OUT)))
goto err;
/*
* Okay, it's not one of the easy ones. Build mxcmd for
* actual volume control.
*/
if (cmd & SIOC_IN)
PREP_UARG(&i, &i);
else
PREP_UARG(NULL, &i);
switch (slot) {
case SOUND_MIXER_PCM:
dir = PLAY;
break;
case SOUND_MIXER_IGAIN:
dir = REC;
break;
default:
i = 0;
IOCTL_RETURN(0, &i);
}
init_mixer_cmd(&mxcmd, mixer);
if (cmd & SIOC_IN) {
unsigned l, r;
rc = -EINVAL;
l = i & 0xff;
r = (i >> 8) & 0xff;
if (l > 100 || r > 100)
goto err;
mixer->vol[dir][LEFT] = mxcmd.set.vol[dir][LEFT] = l;
mixer->vol[dir][RIGHT] = mxcmd.set.vol[dir][RIGHT] = r;
}
mxcmd.out_dir = dir;
/*
* Apply volume conrol
*/
/* acquire target streams */
pthread_mutex_lock(&mutex);
osa = calloc(max_streams, sizeof(osa[0]));
if (!osa) {
pthread_mutex_unlock(&mutex);
rc = -ENOMEM;
goto err;
}
nr_os = 0;
list_for_each_entry(os, os_pgrp_tbl_head(mixer->pgrp), pgrp_link) {
if (os->pgrp == mixer->pgrp) {
osa[nr_os++] = os;
os->refcnt++;
}
}
pthread_mutex_unlock(&mutex);
/* execute mxcmd for each stream and put it */
for (i = 0; i < nr_os; i++) {
exec_mixer_cmd(&mxcmd, osa[i]);
put_os(osa[i]);
}
finish_mixer_cmd(&mxcmd);
free(osa);
IOCTL_RETURN(0, out_bufsz ? &mxcmd.rvol : NULL);
err:
fuse_reply_err(req, -rc);
}
static void mixer_open(fuse_req_t req, struct fuse_file_info *fi)
{
pid_t pid = fuse_req_ctx(req)->pid, pgrp;
struct ossp_mixer *mixer;
int rc;
rc = get_proc_self_info(pid, &pgrp, NULL, 0);
if (rc) {
err_e(rc, "get_proc_self_info(%d) failed", pid);
fuse_reply_err(req, -rc);
return;
}
mixer = get_mixer(pgrp);
fi->fh = pgrp;
if (mixer)
fuse_reply_open(req, fi);
else
fuse_reply_err(req, ENOMEM);
}
static void mixer_ioctl(fuse_req_t req, int signed_cmd, void *uarg,
struct fuse_file_info *fi, unsigned int flags,
const void *in_buf, size_t in_bufsz, size_t out_bufsz)
{
struct ossp_mixer *mixer;
mixer = find_mixer(fi->fh);
if (!mixer) {
fuse_reply_err(req, EBADF);
return;
}
mixer_do_ioctl(req, mixer, signed_cmd, uarg, in_buf, in_bufsz,
out_bufsz);
}
static void mixer_release(fuse_req_t req, struct fuse_file_info *fi)
{
struct ossp_mixer *mixer;
mixer = find_mixer(fi->fh);
if (mixer) {
put_mixer(mixer);
fuse_reply_err(req, 0);
} else
fuse_reply_err(req, EBADF);
}
/***************************************************************************
* Stream implementation
*/
static int alloc_os(size_t stream_size, size_t mmap_size, pid_t pid, uid_t pgrp,
uid_t uid, gid_t gid, int cmd_sock,
const int *notify, struct fuse_session *se,
struct ossp_stream **osp)
{
struct ossp_uid_cnt *tmp_ucnt, *ucnt = NULL;
struct ossp_stream *os;
int rc;
assert(stream_size >= sizeof(struct ossp_stream));
os = calloc(1, stream_size);
if (!os)
return -ENOMEM;
INIT_LIST_HEAD(&os->link);
INIT_LIST_HEAD(&os->pgrp_link);
INIT_LIST_HEAD(&os->notify_link);
os->refcnt = 1;
rc = -pthread_mutex_init(&os->cmd_mutex, NULL);
if (rc)
goto err_free;
rc = -pthread_mutex_init(&os->mmap_mutex, NULL);
if (rc)
goto err_destroy_cmd_mutex;
pthread_mutex_lock(&mutex);
list_for_each_entry(tmp_ucnt, &uid_cnt_list, link)
if (tmp_ucnt->uid == uid) {
ucnt = tmp_ucnt;
break;
}
if (!ucnt) {
rc = -ENOMEM;
ucnt = calloc(1, sizeof(*ucnt));
if (!ucnt)
goto err_unlock;
ucnt->uid = uid;
list_add(&ucnt->link, &uid_cnt_list);
}
rc = -EBUSY;
if (ucnt->nr_os + 1 > umax_streams)
goto err_unlock;
/* everything looks fine, allocate id and init stream */
rc = -EBUSY;
os->id = find_next_zero_bit(os_id_bitmap, max_streams, 0);
if (os->id >= max_streams)
goto err_unlock;
__set_bit(os->id, os_id_bitmap);
os->cmd_fd = cmd_sock;
os->notify_tx = notify[1];
os->notify_rx = notify[0];
os->pid = pid;
os->pgrp = pgrp;
os->uid = uid;
os->gid = gid;
if (mmap_size) {
os->mmap_off = os->id * mmap_size;
os->mmap_size = mmap_size;
}
os->ucnt = ucnt;
os->se = se;
memset(os->vol, -1, sizeof(os->vol));
memset(os->vol_set, -1, sizeof(os->vol));
list_add(&os->link, os_tbl_head(os->id));
list_add(&os->pgrp_link, os_pgrp_tbl_head(os->pgrp));
ucnt->nr_os++;
*osp = os;
pthread_mutex_unlock(&mutex);
return 0;
err_unlock:
pthread_mutex_unlock(&mutex);
pthread_mutex_destroy(&os->mmap_mutex);
err_destroy_cmd_mutex:
pthread_mutex_destroy(&os->cmd_mutex);
err_free:
free(os);
return rc;
}
static void shutdown_notification(struct ossp_stream *os)
{
struct ossp_notify obituary = { .magic = OSSP_NOTIFY_MAGIC,
.opcode = OSSP_NOTIFY_OBITUARY };
ssize_t ret;
/*
* Shutdown notification for this stream. We politely ask
* notify_poller to shut the receive side down to avoid racing
* with it.
*/
while (os->notify_rx >= 0) {
ret = write(os->notify_tx, &obituary, sizeof(obituary));
if (ret <= 0) {
if (ret == 0)
warn_os(os, "unexpected EOF on notify_tx");
else if (errno != EPIPE)
warn_ose(os, -errno,
"unexpected error on notify_tx");
close(os->notify_rx);
os->notify_rx = -1;
break;
}
if (ret != sizeof(obituary))
warn_os(os, "short transfer on notify_tx");
pthread_cond_wait(&notify_poller_kill_wait, &mutex);
}
}
static void put_os(struct ossp_stream *os)
{
if (!os)
return;
pthread_mutex_lock(&mutex);
assert(os->refcnt);
if (--os->refcnt) {
pthread_mutex_unlock(&mutex);
return;
}
os->dead = 1;
shutdown_notification(os);
dbg0_os(os, "DESTROY");
list_del_init(&os->link);
list_del_init(&os->pgrp_link);
list_del_init(&os->notify_link);
os->ucnt->nr_os--;
pthread_mutex_unlock(&mutex);
close(os->cmd_fd);
close(os->notify_tx);
put_mixer(os->mixer);
pthread_mutex_destroy(&os->cmd_mutex);
pthread_mutex_destroy(&os->mmap_mutex);
pthread_mutex_lock(&mutex);
dbg1_os(os, "stream dead, requesting reaping");
list_add_tail(&os->link, &slave_corpse_list);
pthread_cond_signal(&slave_reaper_wait);
pthread_mutex_unlock(&mutex);
}
static void set_extra_env(pid_t pid)
{
char procenviron[32];
const int step = 1024;
char *data = malloc(step + 1);
int ofs = 0;
int fd;
int ret;
if (!data)
return;
sprintf(procenviron, "/proc/%d/environ", pid);
fd = open(procenviron, O_RDONLY);
if (fd < 0)
return;
/*
* There should really be a 'read whole file to a newly allocated
* buffer' function.
*/
while ((ret = read(fd, data + ofs, step)) > 0) {
char *newdata;
ofs += ret;
newdata = realloc(data, ofs + step + 1);
if (!newdata) {
ret = -1;
break;
}
data = newdata;
}
if (ret == 0) {
char *ptr = data;
/* Append the extra 0 for end condition */
data[ofs] = 0;
while ((ret = strlen(ptr)) > 0) {
/*
* Copy all PULSE variables and DISPLAY so that
* ssh -X remotehost 'mplayer -ao oss' will work
*/
if (!strncmp(ptr, "DISPLAY=", 8) ||
!strncmp(ptr, "PULSE_", 6))
putenv(ptr);
ptr += ret + 1;
}
}
free(data);
close(fd);
}
#ifndef GIOVANNI
int contapid = 13000;
#endif// GIOVANNI
static int create_os(const char *slave_path,
size_t stream_size, size_t mmap_size,
pid_t pid, pid_t pgrp, uid_t uid, gid_t gid,
struct fuse_session *se, struct ossp_stream **osp)
{
static pthread_mutex_t create_mutex = PTHREAD_MUTEX_INITIALIZER;
int cmd_sock[2] = { -1, -1 };
int notify_sock[2] = { -1, -1 };
struct ossp_stream *os = NULL;
struct epoll_event ev = { };
int i, rc;
/*
* Only one thread can be creating a stream. This is to avoid
* leaking unwanted fds into slaves.
*/
pthread_mutex_lock(&create_mutex);
/* prepare communication channels */
if (socketpair(AF_UNIX, SOCK_STREAM, 0, cmd_sock) ||
socketpair(AF_UNIX, SOCK_STREAM, 0, notify_sock)) {
rc = -errno;
warn_e(rc, "failed to create slave command channel");
goto close_all;
}
if (fcntl(notify_sock[0], F_SETFL, O_NONBLOCK) < 0) {
rc = -errno;
warn_e(rc, "failed to set NONBLOCK on notify sock");
goto close_all;
}
/*
* Alloc stream which will be responsible for all server side
* resources from now on.
*/
rc = alloc_os(stream_size, mmap_size, pid, pgrp, uid, gid, cmd_sock[0],
notify_sock, se, &os);
if (rc) {
warn_e(rc, "failed to allocate stream for %d", pid);
goto close_all;
}
rc = -ENOMEM;
os->mixer = get_mixer(pgrp);
if (!os->mixer)
goto put_os;
/*
* Register notification. If successful, notify_poller has
* custody of notify_rx fd.
*/
pthread_mutex_lock(&mutex);
list_add(&os->notify_link, os_notify_tbl_head(os->notify_rx));
pthread_mutex_unlock(&mutex);
#ifndef GIOVANNI
os->slave_pid = contapid;
contapid++;
if(contapid > 30000)
contapid=13000;
#endif //GIOVANNI
//#ifdef GIOVANNI
ev.events = EPOLLIN;
ev.data.fd = notify_sock[0];
if (epoll_ctl(notify_epfd, EPOLL_CTL_ADD, notify_sock[0], &ev)) {
/*
* Without poller watching this notify sock, poller
* shutdown sequence in shutdown_notification() can't
* be used. Kill notification rx manually.
*/
rc = -errno;
warn_ose(os, rc, "failed to add notify epoll");
close(os->notify_rx);
os->notify_rx = -1;
goto put_os;
}
/* start slave */
os->slave_pid = fork();
if (os->slave_pid < 0) {
rc = -errno;
warn_ose(os, rc, "failed to fork slave");
goto put_os;
}
if (os->slave_pid == 0) {
/* child */
char id_str[2][16], fd_str[3][16];
char mmap_off_str[32], mmap_size_str[32];
char log_str[16], slave_path_copy[PATH_MAX];
char *argv[] = { slave_path_copy, "-u", id_str[0],
"-g", id_str[1], "-c", fd_str[0],
"-n", fd_str[1], "-m", fd_str[2],
"-o", mmap_off_str, "-s", mmap_size_str,
"-l", log_str, NULL, NULL };
struct passwd *pwd;
/* drop stuff we don't need */
if (close(cmd_sock[0]) || close(notify_sock[0]))
fatal_e(-errno, "failed to close server pipe fds");
#ifdef OSSP_MMAP
if (!mmap_size)
close(fuse_mmap_fd(se));
#endif
clearenv();
pwd = getpwuid(os->uid);
if (pwd) {
setenv("LOGNAME", pwd->pw_name, 1);
setenv("USER", pwd->pw_name, 1);
setenv("HOME", pwd->pw_dir, 1);
}
/* Set extra environment variables from the caller */
set_extra_env(pid);
/* prep and exec */
slave_path_copy[sizeof(slave_path_copy) - 1] = '\0';
strncpy(slave_path_copy, slave_path, sizeof(slave_path_copy) - 1);
if (slave_path_copy[sizeof(slave_path_copy) - 1] != '\0') {
rc = -errno;
err_ose(os, rc, "slave path too long");
goto child_fail;
}
snprintf(id_str[0], sizeof(id_str[0]), "%d", os->uid);
snprintf(id_str[1], sizeof(id_str[0]), "%d", os->gid);
snprintf(fd_str[0], sizeof(fd_str[0]), "%d", cmd_sock[1]);
snprintf(fd_str[1], sizeof(fd_str[1]), "%d", notify_sock[1]);
snprintf(fd_str[2], sizeof(fd_str[2]), "%d",
#ifdef OSSP_MMAP
mmap_size ? fuse_mmap_fd(se) :
#endif
-1);
snprintf(mmap_off_str, sizeof(mmap_off_str), "0x%llx",
(unsigned long long)os->mmap_off);
snprintf(mmap_size_str, sizeof(mmap_size_str), "0x%zx",
mmap_size);
snprintf(log_str, sizeof(log_str), "%d", ossp_log_level);
if (ossp_log_timestamp)
argv[ARRAY_SIZE(argv) - 2] = "-t";
execv(slave_path, argv);
rc = -errno;
err_ose(os, rc, "execv failed for <%d>", pid);
child_fail:
_exit(1);
}
//#endif //GIOVANNI
/* turn on CLOEXEC on all server side fds */
if (fcntl(os->cmd_fd, F_SETFD, FD_CLOEXEC) < 0 ||
fcntl(os->notify_tx, F_SETFD, FD_CLOEXEC) < 0 ||
fcntl(os->notify_rx, F_SETFD, FD_CLOEXEC) < 0) {
rc = -errno;
err_ose(os, rc, "failed to set CLOEXEC on server side fds");
goto put_os;
}
dbg0_os(os, "CREATE slave=%d %s", os->slave_pid, slave_path);
dbg0_os(os, " client=%d cmd=%d:%d notify=%d:%d mmap=%d:0x%llx:%zu",
pid, cmd_sock[0], cmd_sock[1], notify_sock[0], notify_sock[1],
#ifdef OSSP_MMAP
os->mmap_size ? fuse_mmap_fd(se) :
#endif
-1,
(unsigned long long)os->mmap_off, os->mmap_size);
*osp = os;
rc = 0;
goto close_client_fds;
put_os:
put_os(os);
close_client_fds:
close(cmd_sock[1]);
pthread_mutex_unlock(&create_mutex);
return rc;
close_all:
for (i = 0; i < 2; i++) {
close(cmd_sock[i]);
close(notify_sock[i]);
}
pthread_mutex_unlock(&create_mutex);
return rc;
}
static void dsp_open_common(fuse_req_t req, struct fuse_file_info *fi,
struct fuse_session *se)
{
const struct fuse_ctx *fuse_ctx = fuse_req_ctx(req);
struct ossp_dsp_open_arg arg = { };
struct ossp_stream *os = NULL;
struct ossp_mixer *mixer;
struct ossp_dsp_stream *dsps;
struct ossp_mixer_cmd mxcmd;
pid_t pgrp;
ssize_t ret;
ret = get_proc_self_info(fuse_ctx->pid, &pgrp, NULL, 0);
if (ret) {
err_e(ret, "get_proc_self_info(%d) failed", fuse_ctx->pid);
goto err;
}
ret = create_os(dsp_slave_path, sizeof(*dsps), DSPS_MMAP_SIZE,
fuse_ctx->pid, pgrp, fuse_ctx->uid, fuse_ctx->gid,
se, &os);
if (ret)
goto err;
dsps = os_to_dsps(os);
mixer = os->mixer;
switch (fi->flags & O_ACCMODE) {
case O_WRONLY:
dsps->rw |= 1 << PLAY;
break;
case O_RDONLY:
dsps->rw |= 1 << REC;
break;
case O_RDWR:
dsps->rw |= (1 << PLAY) | (1 << REC);
break;
default:
assert(0);
}
arg.flags = fi->flags;
arg.opener_pid = os->pid;
ret = exec_simple_cmd(&dsps->os, OSSP_DSP_OPEN, &arg, NULL);
if (ret < 0) {
put_os(os);
goto err;
}
memcpy(os->vol, mixer->vol, sizeof(os->vol));
if (os->vol[PLAY][0] >= 0 || os->vol[REC][0] >= 0) {
init_mixer_cmd(&mxcmd, mixer);
memcpy(mxcmd.set.vol, os->vol, sizeof(os->vol));
exec_mixer_cmd(&mxcmd, os);
finish_mixer_cmd(&mxcmd);
}
fi->direct_io = 1;
fi->nonseekable = 1;
fi->fh = os->id;
fuse_reply_open(req, fi);
return;
err:
fuse_reply_err(req, -ret);
}
static void dsp_open(fuse_req_t req, struct fuse_file_info *fi)
{
dsp_open_common(req, fi, dsp_se);
}
static void adsp_open(fuse_req_t req, struct fuse_file_info *fi)
{
dsp_open_common(req, fi, adsp_se);
}
static void dsp_release(fuse_req_t req, struct fuse_file_info *fi)
{
struct ossp_stream *os;
os = find_os(fi->fh);
if (os) {
put_os(os);
fuse_reply_err(req, 0);
} else
fuse_reply_err(req, EBADF);
}
static void dsp_read(fuse_req_t req, size_t size, off_t off,
struct fuse_file_info *fi)
{
struct ossp_dsp_rw_arg arg = { };
struct ossp_stream *os;
struct ossp_dsp_stream *dsps;
void *buf = NULL;
ssize_t ret;
ret = -EBADF;
os = find_os(fi->fh);
if (!os)
goto out;
dsps = os_to_dsps(os);
ret = -EINVAL;
if (!(dsps->rw & (1 << REC)))
goto out;
ret = -ENXIO;
if (dsps->mmapped)
goto out;
ret = -ENOMEM;
buf = malloc(size);
if (!buf)
goto out;
arg.nonblock = (fi->flags & O_NONBLOCK) || dsps->nonblock;
ret = exec_cmd(os, OSSP_DSP_READ, &arg, sizeof(arg),
NULL, 0, NULL, 0, buf, &size, -1);
out:
if (ret >= 0)
fuse_reply_buf(req, buf, size);
else
fuse_reply_err(req, -ret);
free(buf);
}
static void dsp_write(fuse_req_t req, const char *buf, size_t size, off_t off,
struct fuse_file_info *fi)
{
struct ossp_dsp_rw_arg arg = { };
struct ossp_stream *os;
struct ossp_dsp_stream *dsps;
ssize_t ret;
ret = -EBADF;
os = find_os(fi->fh);
if (!os)
goto out;
dsps = os_to_dsps(os);
ret = -EINVAL;
if (!(dsps->rw & (1 << PLAY)))
goto out;
ret = -ENXIO;
if (dsps->mmapped)
goto out;
arg.nonblock = (fi->flags & O_NONBLOCK) || dsps->nonblock;
ret = exec_cmd(os, OSSP_DSP_WRITE, &arg, sizeof(arg),
buf, size, NULL, 0, NULL, NULL, -1);
out:
if (ret >= 0)
fuse_reply_write(req, ret);
else
fuse_reply_err(req, -ret);
}
static void dsp_poll(fuse_req_t req, struct fuse_file_info *fi,
struct fuse_pollhandle *ph)
{
int notify = ph != NULL;
unsigned revents = 0;
struct ossp_stream *os;
ssize_t ret;
ret = -EBADF;
os = find_os(fi->fh);
if (!os)
goto out;
if (ph) {
pthread_mutex_lock(&mutex);
if (os->ph)
fuse_pollhandle_destroy(os->ph);
os->ph = ph;
pthread_mutex_unlock(&mutex);
}
ret = exec_simple_cmd(os, OSSP_DSP_POLL, &notify, &revents);
out:
if (ret >= 0)
fuse_reply_poll(req, revents);
else
fuse_reply_err(req, -ret);
}
static void dsp_ioctl(fuse_req_t req, int signed_cmd, void *uarg,
struct fuse_file_info *fi, unsigned int flags,
const void *in_buf, size_t in_bufsz, size_t out_bufsz)
{
/* some ioctl constants are long and has the highest bit set */
unsigned cmd = signed_cmd;
struct ossp_stream *os;
struct ossp_dsp_stream *dsps;
enum ossp_opcode op;
ssize_t ret;
int i;
ret = -EBADF;
os = find_os(fi->fh);
if (!os)
goto err;
dsps = os_to_dsps(os);
/* mixer commands are allowed on DSP devices */
if (((cmd >> 8) & 0xff) == 'M') {
mixer_do_ioctl(req, os->mixer, cmd, uarg, in_buf, in_bufsz,
out_bufsz);
return;
}
/* and the rest */
switch (cmd) {
case OSS_GETVERSION:
i = SNDRV_OSS_VERSION;
PREP_UARG(NULL, &i);
IOCTL_RETURN(0, &i);
case SNDCTL_DSP_GETCAPS:
i = DSP_CAP_DUPLEX | DSP_CAP_REALTIME | DSP_CAP_TRIGGER |
#ifdef OSSP_MMAP
DSP_CAP_MMAP |
#endif
DSP_CAP_MULTI;
PREP_UARG(NULL, &i);
IOCTL_RETURN(0, &i);
case SNDCTL_DSP_NONBLOCK:
dsps->nonblock = 1;
ret = 0;
IOCTL_RETURN(0, NULL);
case SNDCTL_DSP_RESET: op = OSSP_DSP_RESET; goto nd;
case SNDCTL_DSP_SYNC: op = OSSP_DSP_SYNC; goto nd;
case SNDCTL_DSP_POST: op = OSSP_DSP_POST; goto nd;
nd:
ret = exec_simple_cmd(&dsps->os, op, NULL, NULL);
if (ret)
goto err;
IOCTL_RETURN(0, NULL);
case SOUND_PCM_READ_RATE: op = OSSP_DSP_GET_RATE; goto ri;
case SOUND_PCM_READ_BITS: op = OSSP_DSP_GET_FORMAT; goto ri;
case SOUND_PCM_READ_CHANNELS: op = OSSP_DSP_GET_CHANNELS; goto ri;
case SNDCTL_DSP_GETBLKSIZE: op = OSSP_DSP_GET_BLKSIZE; goto ri;
case SNDCTL_DSP_GETFMTS: op = OSSP_DSP_GET_FORMATS; goto ri;
case SNDCTL_DSP_GETTRIGGER: op = OSSP_DSP_GET_TRIGGER; goto ri;
ri:
PREP_UARG(NULL, &i);
ret = exec_simple_cmd(&dsps->os, op, NULL, &i);
if (ret)
goto err;
IOCTL_RETURN(0, &i);
case SNDCTL_DSP_SPEED: op = OSSP_DSP_SET_RATE; goto wi;
case SNDCTL_DSP_SETFMT: op = OSSP_DSP_SET_FORMAT; goto wi;
case SNDCTL_DSP_CHANNELS: op = OSSP_DSP_SET_CHANNELS; goto wi;
case SNDCTL_DSP_SUBDIVIDE: op = OSSP_DSP_SET_SUBDIVISION; goto wi;
wi:
PREP_UARG(&i, &i);
ret = exec_simple_cmd(&dsps->os, op, &i, &i);
if (ret)
goto err;
IOCTL_RETURN(0, &i);
case SNDCTL_DSP_STEREO:
PREP_UARG(NULL, &i);
i = 2;
ret = exec_simple_cmd(&dsps->os, OSSP_DSP_SET_CHANNELS, &i, &i);
i--;
if (ret)
goto err;
IOCTL_RETURN(0, &i);
case SNDCTL_DSP_SETFRAGMENT:
PREP_UARG(&i, NULL);
ret = exec_simple_cmd(&dsps->os,
OSSP_DSP_SET_FRAGMENT, &i, NULL);
if (ret)
goto err;
IOCTL_RETURN(0, NULL);
case SNDCTL_DSP_SETTRIGGER:
PREP_UARG(&i, NULL);
ret = exec_simple_cmd(&dsps->os,
OSSP_DSP_SET_TRIGGER, &i, NULL);
if (ret)
goto err;
IOCTL_RETURN(0, NULL);
case SNDCTL_DSP_GETOSPACE:
case SNDCTL_DSP_GETISPACE: {
struct audio_buf_info info;
ret = -EINVAL;
if (cmd == SNDCTL_DSP_GETOSPACE) {
if (!(dsps->rw & (1 << PLAY)))
goto err;
op = OSSP_DSP_GET_OSPACE;
} else {
if (!(dsps->rw & (1 << REC)))
goto err;
op = OSSP_DSP_GET_ISPACE;
}
PREP_UARG(NULL, &info);
ret = exec_simple_cmd(&dsps->os, op, NULL, &info);
if (ret)
goto err;
IOCTL_RETURN(0, &info);
}
case SNDCTL_DSP_GETOPTR:
case SNDCTL_DSP_GETIPTR: {
struct count_info info;
op = cmd == SNDCTL_DSP_GETOPTR ? OSSP_DSP_GET_OPTR
: OSSP_DSP_GET_IPTR;
PREP_UARG(NULL, &info);
ret = exec_simple_cmd(&dsps->os, op, NULL, &info);
if (ret)
goto err;
IOCTL_RETURN(0, &info);
}
case SNDCTL_DSP_GETODELAY:
PREP_UARG(NULL, &i);
i = 0;
ret = exec_simple_cmd(&dsps->os, OSSP_DSP_GET_ODELAY, NULL, &i);
IOCTL_RETURN(ret, &i); /* always copy out result, 0 on err */
case SOUND_PCM_WRITE_FILTER:
case SOUND_PCM_READ_FILTER:
ret = -EIO;
goto err;
case SNDCTL_DSP_MAPINBUF:
case SNDCTL_DSP_MAPOUTBUF:
ret = -EINVAL;
goto err;
case SNDCTL_DSP_SETSYNCRO:
case SNDCTL_DSP_SETDUPLEX:
case SNDCTL_DSP_PROFILE:
IOCTL_RETURN(0, NULL);
default:
warn_os(os, "unknown ioctl 0x%x", cmd);
ret = -EINVAL;
goto err;
}
assert(0); /* control shouldn't reach here */
err:
fuse_reply_err(req, -ret);
}
#ifdef OSSP_MMAP
static int dsp_mmap_dir(int prot)
{
if (!(prot & PROT_WRITE))
return REC;
return PLAY;
}
static void dsp_mmap(fuse_req_t req, void *addr, size_t len, int prot,
int flags, off_t offset, struct fuse_file_info *fi,
uint64_t mh)
{
int dir = dsp_mmap_dir(prot);
struct ossp_dsp_mmap_arg arg = { };
struct ossp_stream *os;
struct ossp_dsp_stream *dsps;
ssize_t ret;
os = find_os(fi->fh);
if (!os) {
fuse_reply_err(req, EBADF);
return;
}
dsps = os_to_dsps(os);
if (!os->mmap_off || len > os->mmap_size / 2) {
fuse_reply_err(req, EINVAL);
return;
}
pthread_mutex_lock(&os->mmap_mutex);
ret = -EBUSY;
if (dsps->mmapped & (1 << dir))
goto out_unlock;
arg.dir = dir;
arg.size = len;
ret = exec_simple_cmd(os, OSSP_DSP_MMAP, &arg, NULL);
if (ret == 0)
dsps->mmapped |= 1 << dir;
out_unlock:
pthread_mutex_unlock(&os->mmap_mutex);
if (ret == 0)
fuse_reply_mmap(req, os->mmap_off + dir * os->mmap_size / 2, 0);
else
fuse_reply_err(req, -ret);
}
static void dsp_munmap(fuse_req_t req, size_t len, struct fuse_file_info *fi,
off_t offset, uint64_t mh)
{
struct ossp_stream *os;
struct ossp_dsp_stream *dsps;
int dir, rc;
os = find_os(fi->fh);
if (!os)
goto out;
dsps = os_to_dsps(os);
pthread_mutex_lock(&os->mmap_mutex);
for (dir = 0; dir < 2; dir++)
if (offset == os->mmap_off + dir * os->mmap_size / 2)
break;
if (dir == 2 || len > os->mmap_size / 2) {
warn_os(os, "invalid munmap request "
"offset=%llu len=%zu mmapped=0x%x",
(unsigned long long)offset, len, dsps->mmapped);
goto out_unlock;
}
rc = exec_simple_cmd(os, OSSP_DSP_MUNMAP, &dir, NULL);
if (rc)
warn_ose(os, rc, "MUNMAP failed for dir=%d", dir);
dsps->mmapped &= ~(1 << dir);
out_unlock:
pthread_mutex_unlock(&os->mmap_mutex);
out:
fuse_reply_none(req);
}
#endif
/***************************************************************************
* Notify poller
*/
static void *notify_poller(void *arg)
{
struct epoll_event events[1024];
int i, nfds;
repeat:
nfds = epoll_wait(notify_epfd, events, ARRAY_SIZE(events), -1);
for (i = 0; i < nfds; i++) {
int do_notify = 0;
struct ossp_stream *os;
struct ossp_notify notify;
ssize_t ret;
os = find_os_by_notify_rx(events[i].data.fd);
if (!os) {
err("can't find stream for notify_rx fd %d",
events[i].data.fd);
epoll_ctl(notify_epfd, EPOLL_CTL_DEL, events[i].data.fd,
NULL);
/* we don't know what's going on, don't close the fd */
continue;
}
while ((ret = read(os->notify_rx,
&notify, sizeof(notify))) > 0) {
if (os->dead)
continue;
if (ret != sizeof(notify)) {
warn_os(os, "short read on notify_rx (%zu, "
"expected %zu), killing the stream",
ret, sizeof(notify));
os->dead = 1;
break;
}
if (notify.magic != OSSP_NOTIFY_MAGIC) {
warn_os(os, "invalid magic on notification, "
"killing the stream");
os->dead = 1;
break;
}
if (notify.opcode >= OSSP_NR_NOTIFY_OPCODES)
goto unknown;
dbg1_os(os, "NOTIFY %s", ossp_notify_str[notify.opcode]);
switch (notify.opcode) {
case OSSP_NOTIFY_POLL:
do_notify = 1;
break;
case OSSP_NOTIFY_OBITUARY:
os->dead = 1;
break;
case OSSP_NOTIFY_VOLCHG:
pthread_mutex_lock(&mixer_mutex);
os->mixer->modify_counter++;
pthread_mutex_unlock(&mixer_mutex);
break;
default:
unknown:
warn_os(os, "unknown notification %d",
notify.opcode);
}
}
if (ret == 0)
os->dead = 1;
else if (ret < 0 && errno != EAGAIN) {
warn_ose(os, -errno, "read fail on notify fd");
os->dead = 1;
}
if (!do_notify && !os->dead)
continue;
pthread_mutex_lock(&mutex);
if (os->ph) {
fuse_lowlevel_notify_poll(os->ph);
fuse_pollhandle_destroy(os->ph);
os->ph = NULL;
}
if (os->dead) {
dbg0_os(os, "removing %d from notify poll list",
os->notify_rx);
epoll_ctl(notify_epfd, EPOLL_CTL_DEL, os->notify_rx,
NULL);
close(os->notify_rx);
os->notify_rx = -1;
pthread_cond_broadcast(&notify_poller_kill_wait);
}
pthread_mutex_unlock(&mutex);
}
goto repeat;
}
/***************************************************************************
* Slave corpse reaper
*/
static void *slave_reaper(void *arg)
{
struct ossp_stream *os;
int status;
pid_t pid;
pthread_mutex_lock(&mutex);
repeat:
while (list_empty(&slave_corpse_list))
pthread_cond_wait(&slave_reaper_wait, &mutex);
os = list_first_entry(&slave_corpse_list, struct ossp_stream, link);
list_del_init(&os->link);
pthread_mutex_unlock(&mutex);
do {
pid = waitpid(os->slave_pid, &status, 0);
} while (pid < 0 && errno == EINTR);
if (pid < 0) {
if (errno == ECHILD)
warn_ose(os, -errno, "slave %d already gone?",
os->slave_pid);
else
fatal_e(-errno, "waitpid(%d) failed", os->slave_pid);
}
pthread_mutex_lock(&mutex);
dbg1_os(os, "slave %d reaped", os->slave_pid);
__clear_bit(os->id, os_id_bitmap);
free(os);
goto repeat;
}
/***************************************************************************
* Stuff to bind and start everything
*/
static void ossp_daemonize(void)
{
int fd, pfd[2];
pid_t pid;
ssize_t ret;
int err;
fd = open("/dev/null", O_RDWR);
if (fd >= 0) {
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
if (fd > 2)
close(fd);
}
if (pipe(pfd))
fatal_e(-errno, "failed to create pipe for init wait");
if (fcntl(pfd[0], F_SETFD, FD_CLOEXEC) < 0 ||
fcntl(pfd[1], F_SETFD, FD_CLOEXEC) < 0)
fatal_e(-errno, "failed to set CLOEXEC on init wait pipe");
pid = fork();
if (pid < 0)
fatal_e(-errno, "failed to fork for daemon");
if (pid == 0) {
close(pfd[0]);
init_wait_fd = pfd[1];
/* be evil, my child */
chdir("/");
setsid();
return;
}
/* wait for init completion and pass over success indication */
close(pfd[1]);
do {
ret = read(pfd[0], &err, sizeof(err));
} while (ret < 0 && errno == EINTR);
if (ret == sizeof(err) && err == 0)
exit(0);
fatal("daemon init failed ret=%zd err=%d", ret, err);
exit(1);
}
static void ossp_init_done(void *userdata)
{
/* init complete, notify parent if it's waiting */
if (init_wait_fd >= 0) {
ssize_t ret;
int err = 0;
ret = write(init_wait_fd, &err, sizeof(err));
if (ret != sizeof(err))
fatal_e(-errno, "failed to notify init completion, "
"ret=%zd", ret);
close(init_wait_fd);
init_wait_fd = -1;
}
}
static const struct cuse_lowlevel_ops mixer_ops = {
.open = mixer_open,
.release = mixer_release,
.ioctl = mixer_ioctl,
};
static const struct cuse_lowlevel_ops dsp_ops = {
.init_done = ossp_init_done,
.open = dsp_open,
.release = dsp_release,
.read = dsp_read,
.write = dsp_write,
.poll = dsp_poll,
.ioctl = dsp_ioctl,
#ifdef OSSP_MMAP
.mmap = dsp_mmap,
.munmap = dsp_munmap,
#endif
};
static const struct cuse_lowlevel_ops adsp_ops = {
.open = adsp_open,
.release = dsp_release,
.read = dsp_read,
.write = dsp_write,
.poll = dsp_poll,
.ioctl = dsp_ioctl,
#ifdef OSSP_MMAP
.mmap = dsp_mmap,
.munmap = dsp_munmap,
#endif
};
static const char *usage =
"usage: osspd [options]\n"
"\n"
"options:\n"
" --help print this help message\n"
" --dsp=NAME DSP device name (default dsp)\n"
" --dsp-maj=MAJ DSP device major number (default 14)\n"
" --dsp-min=MIN DSP device minor number (default 3)\n"
" --adsp=NAME Aux DSP device name (default adsp, blank to disable)\n"
" --adsp-maj=MAJ Aux DSP device major number (default 14)\n"
" --adsp-min=MIN Aux DSP device minor number (default 12)\n"
" --mixer=NAME mixer device name (default mixer, blank to disable)\n"
" --mixer-maj=MAJ mixer device major number (default 14)\n"
" --mixer-min=MIN mixer device minor number (default 0)\n"
" --max=MAX maximum number of open streams (default 256)\n"
" --umax=MAX maximum number of open streams per UID (default --max)\n"
" --exit-on-idle exit if idle\n"
" --dsp-slave=PATH DSP slave (default ossp-padsp in the same dir)\n"
" --log=LEVEL log level (0..6)\n"
" --timestamp timestamp log messages\n"
" -v increase verbosity, can be specified multiple times\n"
" -f Run in foreground (don't daemonize)\n"
"\n";
struct ossp_param {
char *dsp_name;
unsigned dsp_major;
unsigned dsp_minor;
char *adsp_name;
unsigned adsp_major;
unsigned adsp_minor;
char *mixer_name;
unsigned mixer_major;
unsigned mixer_minor;
unsigned max_streams;
unsigned umax_streams;
char *dsp_slave_path;
unsigned log_level;
int exit_on_idle;
int timestamp;
int fg;
int help;
};
#define OSSP_OPT(t, p) { t, offsetof(struct ossp_param, p), 1 }
static const struct fuse_opt ossp_opts[] = {
OSSP_OPT("--dsp=%s", dsp_name),
OSSP_OPT("--dsp-maj=%u", dsp_major),
OSSP_OPT("--dsp-min=%u", dsp_minor),
OSSP_OPT("--adsp=%s", adsp_name),
OSSP_OPT("--adsp-maj=%u", adsp_major),
OSSP_OPT("--adsp-min=%u", adsp_minor),
OSSP_OPT("--mixer=%s", mixer_name),
OSSP_OPT("--mixer-maj=%u", mixer_major),
OSSP_OPT("--mixer-min=%u", mixer_minor),
OSSP_OPT("--max=%u", max_streams),
OSSP_OPT("--umax=%u", umax_streams),
OSSP_OPT("--exit-on-idle", exit_on_idle),
OSSP_OPT("--dsp-slave=%s", dsp_slave_path),
OSSP_OPT("--timestamp", timestamp),
OSSP_OPT("--log=%u", log_level),
OSSP_OPT("-f", fg),
FUSE_OPT_KEY("-h", 0),
FUSE_OPT_KEY("--help", 0),
FUSE_OPT_KEY("-v", 1),
FUSE_OPT_END
};
static struct fuse_session *setup_ossp_cuse(const struct cuse_lowlevel_ops *ops,
const char *name, int major,
int minor, int argc, char **argv)
{
char name_buf[128];
const char *bufp = name_buf;
struct cuse_info ci = { .dev_major = major, .dev_minor = minor,
.dev_info_argc = 1, .dev_info_argv = &bufp,
.flags = CUSE_UNRESTRICTED_IOCTL };
struct fuse_session *se;
int fd;
snprintf(name_buf, sizeof(name_buf), "DEVNAME=%s", name);
se = cuse_lowlevel_setup(argc, argv, &ci, ops, NULL, NULL);
if (!se) {
err("failed to setup %s CUSE", name);
return NULL;
}
fd = fuse_chan_fd(fuse_session_next_chan(se, NULL));
if (
#ifdef OSSP_MMAP
fd != fuse_mmap_fd(se) &&
#endif
fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) {
err_e(-errno, "failed to set CLOEXEC on %s CUSE fd", name);
cuse_lowlevel_teardown(se);
return NULL;
}
return se;
}
static void *cuse_worker(void *arg)
{
struct fuse_session *se = arg;
int rc;
rc = fuse_session_loop_mt(se);
cuse_lowlevel_teardown(se);
return (void *)(unsigned long)rc;
}
static int process_arg(void *data, const char *arg, int key,
struct fuse_args *outargs)
{
struct ossp_param *param = data;
switch (key) {
case 0:
fprintf(stderr, usage);
param->help = 1;
return 0;
case 1:
param->log_level++;
return 0;
}
return 1;
}
int main(int argc, char **argv)
{
static struct ossp_param param = {
.dsp_name = DFL_DSP_NAME,
.dsp_major = DFL_DSP_MAJOR, .dsp_minor = DFL_DSP_MINOR,
.adsp_name = DFL_ADSP_NAME,
.adsp_major = DFL_ADSP_MAJOR, .adsp_minor = DFL_ADSP_MINOR,
.mixer_name = DFL_MIXER_NAME,
.mixer_major = DFL_MIXER_MAJOR, .mixer_minor = DFL_MIXER_MINOR,
.max_streams = DFL_MAX_STREAMS,
};
struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
char path_buf[PATH_MAX], *dir;
char adsp_buf[64] = "", mixer_buf[64] = "";
struct sigaction sa;
struct stat stat_buf;
ssize_t ret;
unsigned u;
snprintf(ossp_log_name, sizeof(ossp_log_name), "osspd");
param.log_level = ossp_log_level;
if (fuse_opt_parse(&args, &param, ossp_opts, process_arg))
fatal("failed to parse arguments");
if (param.help)
return 0;
max_streams = param.max_streams;
hashtbl_size = max_streams / 2 + 13;
umax_streams = max_streams;
if (param.umax_streams)
umax_streams = param.umax_streams;
if (param.log_level > OSSP_LOG_MAX)
param.log_level = OSSP_LOG_MAX;
if (!param.fg)
param.log_level = -param.log_level;
ossp_log_level = param.log_level;
ossp_log_timestamp = param.timestamp;
if (!param.fg)
ossp_daemonize();
/* daemonization already handled, prevent forking inside FUSE */
fuse_opt_add_arg(&args, "-f");
info("OSS Proxy v%s (C) 2008-2010 by Tejun Heo <teheo@suse.de>",
OSSP_VERSION);
/* ignore stupid SIGPIPEs */
memset(&sa, 0, sizeof(sa));
sa.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &sa, NULL))
fatal_e(-errno, "failed to ignore SIGPIPE");
//#ifdef GIOVANNI
/* determine slave path and check for availability */
ret = readlink("/proc/self/exe", path_buf, PATH_MAX - 1);
if (ret < 0)
fatal_e(-errno, "failed to determine executable path");
path_buf[ret] = '\0';
dir = dirname(path_buf);
if (param.dsp_slave_path) {
strncpy(dsp_slave_path, param.dsp_slave_path, PATH_MAX - 1);
dsp_slave_path[PATH_MAX - 1] = '\0';
} else {
ret = snprintf(dsp_slave_path, PATH_MAX, "%s/%s",
dir, "ossp-padsp");
if (ret >= PATH_MAX)
fatal("dsp slave pathname too long");
}
if (stat(dsp_slave_path, &stat_buf))
fatal_e(-errno, "failed to stat %s", dsp_slave_path);
if (!S_ISREG(stat_buf.st_mode) || !(stat_buf.st_mode & 0444))
fatal("%s is not executable", dsp_slave_path);
//#endif// GIOVANNI
/* allocate tables */
os_id_bitmap = calloc(BITS_TO_LONGS(max_streams), sizeof(long));
mixer_tbl = calloc(hashtbl_size, sizeof(mixer_tbl[0]));
os_tbl = calloc(hashtbl_size, sizeof(os_tbl[0]));
os_pgrp_tbl = calloc(hashtbl_size, sizeof(os_pgrp_tbl[0]));
os_notify_tbl = calloc(hashtbl_size, sizeof(os_notify_tbl[0]));
if (!os_id_bitmap || !mixer_tbl || !os_tbl || !os_pgrp_tbl ||
!os_notify_tbl)
fatal("failed to allocate stream hash tables");
for (u = 0; u < hashtbl_size; u++) {
INIT_LIST_HEAD(&mixer_tbl[u]);
INIT_LIST_HEAD(&os_tbl[u]);
INIT_LIST_HEAD(&os_pgrp_tbl[u]);
INIT_LIST_HEAD(&os_notify_tbl[u]);
}
__set_bit(0, os_id_bitmap); /* don't use id 0 */
/* create mixer delayed reference worker */
ret = -pthread_create(&mixer_delayed_put_thread, NULL,
mixer_delayed_put_worker, NULL);
if (ret)
fatal_e(ret, "failed to create mixer delayed put worker");
/* if exit_on_idle, touch mixer for pgrp0 */
exit_on_idle = param.exit_on_idle;
if (exit_on_idle) {
struct ossp_mixer *mixer;
mixer = get_mixer(0);
if (!mixer)
fatal("failed to touch idle mixer");
put_mixer(mixer);
}
/* create notify epoll and kick off watcher thread */
notify_epfd = epoll_create(max_streams);
if (notify_epfd < 0)
fatal_e(-errno, "failed to create notify epoll");
if (fcntl(notify_epfd, F_SETFD, FD_CLOEXEC) < 0)
fatal_e(-errno, "failed to set CLOEXEC on notify epfd");
ret = -pthread_create(&notify_poller_thread, NULL, notify_poller, NULL);
if (ret)
fatal_e(ret, "failed to create notify poller thread");
/* create reaper for slave corpses */
ret = -pthread_create(&slave_reaper_thread, NULL, slave_reaper, NULL);
if (ret)
fatal_e(ret, "failed to create slave reaper thread");
#ifdef GIOVANNI
/* we're set, let's setup fuse structures */
if (strlen(param.mixer_name))
mixer_se = setup_ossp_cuse(&mixer_ops, param.mixer_name,
param.mixer_major, param.mixer_minor,
args.argc, args.argv);
if (strlen(param.adsp_name))
adsp_se = setup_ossp_cuse(&dsp_ops, param.adsp_name,
param.adsp_major, param.adsp_minor,
args.argc, args.argv);
#endif// GIOVANNI
dsp_se = setup_ossp_cuse(&dsp_ops, param.dsp_name,
param.dsp_major, param.dsp_minor,
args.argc, args.argv);
if (!dsp_se)
fatal("can't create dsp, giving up");
#ifdef GIOVANNI
if (mixer_se)
snprintf(mixer_buf, sizeof(mixer_buf), ", %s (%d:%d)",
param.mixer_name, param.mixer_major, param.mixer_minor);
if (adsp_se)
snprintf(adsp_buf, sizeof(adsp_buf), ", %s (%d:%d)",
param.adsp_name, param.adsp_major, param.adsp_minor);
#endif// GIOVANNI
info("Creating %s (%d:%d)%s%s", param.dsp_name, param.dsp_major,
param.dsp_minor, adsp_buf, mixer_buf);
#ifdef GIOVANNI
/* start threads for mixer and adsp */
if (mixer_se) {
ret = -pthread_create(&cuse_mixer_thread, NULL,
cuse_worker, mixer_se);
if (ret)
err_e(ret, "failed to create mixer worker");
}
if (adsp_se) {
ret = -pthread_create(&cuse_adsp_thread, NULL,
cuse_worker, adsp_se);
if (ret)
err_e(ret, "failed to create adsp worker");
}
#endif// GIOVANNI
/* run CUSE for /dev/dsp in the main thread */
ret = (ssize_t)cuse_worker(dsp_se);
if (ret < 0)
fatal("dsp worker failed");
return 0;
}
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