--- /dev/null
+*.[oa]
+*~
+ossp-alsap
+ossp-padsp
+osspd
+osstest
--- /dev/null
+# 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"
--- /dev/null
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
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+Foundation's software and to any other program whose authors commit to
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+the GNU Lesser General Public License instead.) You can apply it to
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+
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+
+ For example, if you distribute copies of such a program, whether
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+
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License. The "Program", below,
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+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
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+ To do so, attach the following notices to the program. It is safest
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+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
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+
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+
+ Gnomovision version 69, Copyright (C) year name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ <signature of Ty Coon>, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
--- /dev/null
+# 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
+
+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
--- /dev/null
+
+ 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
--- /dev/null
+/*
+ * 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;
+}
+
+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;
+}
+
+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;
+}
--- /dev/null
+/*
+ * ossp-padsp - ossp DSP slave which forwards to pulseaduio
+ *
+ * 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 <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 <pulse/pulseaudio.h>
+#include <sys/soundcard.h>
+
+#include "ossp-slave.h"
+
+enum {
+ AFMT_FLOAT = 0x00004000,
+ AFMT_S32_LE = 0x00001000,
+ AFMT_S32_BE = 0x00002000,
+};
+
+/* everything is in millisecs */
+struct stream_params {
+ size_t min_process;
+ size_t min_latency;
+ size_t dfl_process;
+ size_t dfl_latency;
+ size_t mmap_process;
+ size_t mmap_latency;
+ size_t mmap_lead;
+ size_t mmap_staging;
+};
+
+/* TODO: make this configurable */
+static struct stream_params stream_params[] = {
+ [ PLAY ] = { .min_process = 25, .min_latency = 100,
+ .dfl_process = 50, .dfl_latency = 200,
+ .mmap_process = 25, .mmap_latency = 50,
+ .mmap_lead = 25, .mmap_staging = 100 },
+ [ REC ] = { .min_process = 25, .min_latency = 200,
+ .dfl_process = 50, .dfl_latency = 400,
+ .mmap_process = 25, .mmap_latency = 50,
+ .mmap_lead = 25, .mmap_staging = 1000 },
+};
+
+static size_t page_size;
+static pa_context *context;
+static pa_threaded_mainloop *mainloop;
+static pa_mainloop_api *mainloop_api;
+static char stream_name[128];
+static int stream_enabled[2];
+static int stream_corked[2];
+static int stream_waiting;
+static int stream_notify;
+static pa_channel_map channel_map_stor;
+static pa_channel_map *channel_map;
+static pa_stream *stream[2];
+static pa_usec_t stream_ptr_timestamp[2];
+static struct ring_buf rec_buf;
+static int stored_oss_vol[2][2] = { { -1, -1 }, { -1, -1 } };
+static int fail_code;
+
+static pa_sample_spec sample_spec = {
+ .format = PA_SAMPLE_U8,
+ .rate = 8000,
+ .channels = 1,
+};
+static size_t sample_bps = 8000;
+static size_t frame_size = 1;
+
+/* user visible stream parameters */
+static size_t user_frag_size;
+static size_t user_subdivision; /* alternative way to determine frag_size */
+static size_t user_max_frags; /* maximum number of fragments */
+static size_t user_max_length;
+
+/* actual stream parameters */
+static size_t frag_size;
+static size_t target_length;
+static size_t max_length;
+static size_t prebuf_size;
+
+/* mmap stuff */
+static size_t mmap_raw_size, mmap_size;
+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 */
+
+static const char *dir_str[] = {
+ [PLAY] = "PLAY",
+ [REC] = "REC",
+};
+
+static void stream_rw_callback(pa_stream *s, size_t length, void *userdata);
+
+#define __pa_err pa_strerror(pa_context_errno(context))
+#define dbg1_pa(fmt, args...) dbg1(fmt" (%s)" , ##args, __pa_err)
+#define dbg0_pa(fmt, args...) dbg0(fmt" (%s)" , ##args, __pa_err)
+#define info_pa(fmt, args...) info(fmt" (%s)" , ##args, __pa_err)
+#define warn_pa(fmt, args...) warn(fmt" (%s)" , ##args, __pa_err)
+#define err_pa(fmt, args...) err(fmt" (%s)" , ##args, __pa_err)
+
+#define round_down(v, t) ((v) / (t) * (t))
+#define round_up(v, t) (((v) + (t) - 1) / (t) * (t))
+#define is_power2(v) !((v) & ((v) - 1))
+
+static int do_mixer(int dir, int *vol);
+
+static int padsp_done(void)
+{
+ fail_code = -EIO;
+ mainloop_api->quit(mainloop_api, 1);
+ return fail_code;
+}
+
+static int fmt_oss_to_pa(int fmt)
+{
+ switch (fmt) {
+ case AFMT_U8: return PA_SAMPLE_U8;
+ case AFMT_A_LAW: return PA_SAMPLE_ALAW;
+ case AFMT_MU_LAW: return PA_SAMPLE_ULAW;
+ case AFMT_S16_LE: return PA_SAMPLE_S16LE;
+ case AFMT_S16_BE: return PA_SAMPLE_S16BE;
+ case AFMT_FLOAT: return PA_SAMPLE_FLOAT32NE;
+ case AFMT_S32_LE: return PA_SAMPLE_S32LE;
+ case AFMT_S32_BE: return PA_SAMPLE_S32BE;
+ default: return PA_SAMPLE_U8;
+ }
+}
+
+static int fmt_pa_to_oss(int fmt)
+{
+ switch (fmt) {
+ case PA_SAMPLE_U8: return AFMT_U8;
+ case PA_SAMPLE_ALAW: return AFMT_A_LAW;
+ case PA_SAMPLE_ULAW: return AFMT_MU_LAW;
+ case PA_SAMPLE_S16LE: return AFMT_S16_LE;
+ case PA_SAMPLE_S16BE: return AFMT_S16_BE;
+ case PA_SAMPLE_FLOAT32NE: return AFMT_FLOAT;
+ case PA_SAMPLE_S32LE: return AFMT_S32_LE;
+ case PA_SAMPLE_S32BE: return AFMT_S32_BE;
+ default: return AFMT_U8;
+ }
+}
+
+#define EXEC_OP(op, args...) do { \
+ pa_operation *_o; \
+ _o = op(args); \
+ if (_o) { \
+ while (pa_operation_get_state(_o) != PA_OPERATION_DONE) \
+ pa_threaded_mainloop_wait(mainloop); \
+ pa_operation_unref(_o); \
+ } } while (0)
+
+static void context_op_callback(pa_context *s, int success, void *userdata)
+{
+ *(int *)userdata = success;
+ pa_threaded_mainloop_signal(mainloop, 0);
+}
+
+static void stream_op_callback(pa_stream *s, int success, void *userdata)
+{
+ *(int *)userdata = success;
+ pa_threaded_mainloop_signal(mainloop, 0);
+}
+
+#define EXEC_CONTEXT_OP(op, args...) ({ \
+ int _success; \
+ EXEC_OP(op , ##args, context_op_callback, &_success); \
+ if (!_success) \
+ warn_pa("%s() failed", #op); \
+ _success ? 0 : -EIO; })
+
+#define EXEC_STREAM_OP(op, args...) ({ \
+ int _success; \
+ EXEC_OP(op , ##args, stream_op_callback, &_success); \
+ if (!_success) \
+ warn_pa("%s() failed", #op); \
+ _success ? 0 : -EIO; })
+
+static int mmapped(void)
+{
+ return mmap_map[PLAY] || mmap_map[REC];
+}
+
+static uint64_t get_mmap_idx(int dir)
+{
+ uint64_t idx;
+ pa_usec_t time;
+
+ if (!stream[dir])
+ return mmap_idx[dir];
+
+ if (pa_stream_get_time(stream[dir], &time) < 0) {
+ dbg1_pa("pa_stream_get_time() failed");
+ return mmap_idx[dir];
+ }
+
+ /* calculate the current index from time elapsed */
+ idx = ((uint64_t)time * sample_bps / 1000000);
+ /* round down to the nearest frame boundary */
+ idx = idx / frame_size * frame_size;
+
+ return idx;
+}
+
+static void flush_streams(int drain)
+{
+ int i;
+
+ if (!(stream[PLAY] || stream[REC]))
+ return;
+
+ dbg0("FLUSH drain=%d", drain);
+
+ /* mmapped streams run forever, can't drain */
+ if (drain && !mmapped() && stream[PLAY])
+ EXEC_STREAM_OP(pa_stream_drain, stream[PLAY]);
+
+ for (i = 0; i < 2; i++)
+ if (stream[i])
+ EXEC_STREAM_OP(pa_stream_flush, stream[i]);
+
+ ring_consume(&rec_buf, ring_bytes(&rec_buf));
+}
+
+static void kill_streams(void)
+{
+ int dir;
+
+ if (!(stream[PLAY] || stream[REC]))
+ return;
+
+ flush_streams(1);
+
+ dbg0("KILL");
+
+ for (dir = 0; dir < 2; dir++) {
+ if (!stream[dir])
+ continue;
+ pa_stream_disconnect(stream[dir]);
+ pa_stream_unref(stream[dir]);
+ stream[dir] = NULL;
+ stream_ptr_timestamp[dir] = 0;
+
+ ring_consume(&mmap_stg[dir], ring_bytes(&mmap_stg[dir]));
+ ring_resize(&mmap_stg[dir], 0);
+ }
+}
+
+static int trigger_streams(int play, int rec)
+{
+ int ret = 0, dir, rc;
+
+ if (play >= 0)
+ stream_corked[PLAY] = !play;
+ if (rec >= 0)
+ stream_corked[REC] = !rec;
+
+ for (dir = 0; dir < 2; dir++) {
+ if (!stream[dir])
+ continue;
+
+ rc = EXEC_STREAM_OP(pa_stream_cork, stream[dir],
+ stream_corked[dir]);
+ if (!rc && dir == PLAY && !mmap_map[dir] && !stream_corked[dir])
+ rc = EXEC_STREAM_OP(pa_stream_trigger, stream[dir]);
+ if (!ret)
+ ret = rc;
+ }
+
+ return ret;
+}
+
+static void stream_state_callback(pa_stream *s, void *userdata)
+{
+ pa_threaded_mainloop_signal(mainloop, 0);
+}
+
+static void stream_underflow_callback(pa_stream *s, void *userdata)
+{
+ int dir = (s == stream[PLAY]) ? PLAY : REC;
+
+ dbg0("%s stream underrun", dir_str[dir]);
+}
+
+static void stream_overflow_callback(pa_stream *s, void *userdata)
+{
+ int dir = (s == stream[PLAY]) ? PLAY : REC;
+
+ dbg0("%s stream overrun", dir_str[dir]);
+}
+
+static size_t duration_to_bytes(size_t dur)
+{
+ return round_up(dur * sample_bps / 1000, frame_size);
+}
+
+static int prepare_streams(void)
+{
+ const struct stream_params *sp;
+ size_t min_frag_size, min_target_length, tmp;
+ int dir, rc;
+
+ /* nothing to do? */
+ if ((!stream_enabled[PLAY] || stream[PLAY]) &&
+ (!stream_enabled[REC] || stream[REC]))
+ return 0;
+
+ /* determine sample parameters */
+ sample_bps = pa_bytes_per_second(&sample_spec);
+ frame_size = pa_frame_size(&sample_spec);
+
+ sp = &stream_params[PLAY];
+ if (stream_enabled[REC])
+ sp = &stream_params[REC];
+
+ min_frag_size = duration_to_bytes(sp->min_process);
+ min_target_length = duration_to_bytes(sp->min_latency);
+
+ /* determine frag_size */
+ if (user_frag_size % frame_size) {
+ warn("requested frag_size (%zu) isn't multiple of frame (%zu)",
+ user_frag_size, frame_size);
+ user_frag_size = round_up(user_frag_size, frame_size);
+ }
+
+ if (user_subdivision)
+ user_frag_size = round_up(sample_bps / user_subdivision,
+ frame_size);
+
+ if (user_frag_size) {
+ frag_size = user_frag_size;
+ if (frag_size < min_frag_size) {
+ dbg0("requested frag_size (%zu) is smaller than "
+ "minimum (%zu)", frag_size, min_frag_size);
+ frag_size = min_frag_size;
+ }
+ } else {
+ tmp = round_up(sp->dfl_process * sample_bps / 1000, frame_size);
+ frag_size = tmp;
+ /* if frame_size is power of two, make frag_size so too */
+ if (is_power2(frame_size)) {
+ frag_size = frame_size;
+ while (frag_size < tmp)
+ frag_size <<= 1;
+ }
+ user_frag_size = frag_size;
+ }
+
+ /* determine target and max length */
+ if (user_max_frags) {
+ target_length = user_max_frags * user_frag_size;
+ if (target_length < min_target_length) {
+ dbg0("requested target_length (%zu) is smaller than "
+ "minimum (%zu)", target_length, min_target_length);
+ target_length = min_target_length;
+ }
+ } else {
+ tmp = round_up(sp->dfl_latency * sample_bps / 1000, frag_size);
+ target_length = tmp;
+ /* if frag_size is power of two, make target_length so
+ * too and align it to page_size.
+ */
+ if (is_power2(frag_size)) {
+ target_length = frag_size;
+ while (target_length < max(tmp, page_size))
+ target_length <<= 1;
+ }
+ user_max_frags = target_length / frag_size;
+ }
+
+ user_max_length = user_frag_size * user_max_frags;
+ max_length = target_length + 2 * frag_size;
+
+ /* If mmapped, create backend stream with fixed parameters to
+ * create illusion of hardware buffer with acceptable latency.
+ */
+ if (mmapped()) {
+ /* set parameters for backend streams */
+ frag_size = duration_to_bytes(sp->mmap_process);
+ target_length = duration_to_bytes(sp->mmap_latency);
+ max_length = target_length + frag_size;
+ prebuf_size = 0;
+
+ mmap_size = round_down(mmap_raw_size, frame_size);
+ if (mmap_size != mmap_raw_size)
+ warn("mmap_raw_size (%zu) unaligned to frame_size "
+ "(%zu), mmap_size adjusted to %zu",
+ mmap_raw_size, frame_size, mmap_size);
+ } else {
+ prebuf_size = min(user_frag_size * 2, user_max_length / 2);
+ prebuf_size = round_down(prebuf_size, frame_size);
+ }
+
+ for (dir = 0; dir < 2; dir++) {
+ pa_buffer_attr new_ba = { };
+ char buf[128];
+ pa_stream *s;
+ pa_stream_flags_t flags;
+ int vol[2];
+ size_t size;
+
+ if (!stream_enabled[dir] || stream[dir])
+ continue;
+
+ dbg0("CREATE %s %s fsz=%zu:%zu", dir_str[dir],
+ pa_sample_spec_snprint(buf, sizeof(buf), &sample_spec),
+ frag_size, frag_size * 1000 / sample_bps);
+ dbg0(" tlen=%zu:%zu max=%zu:%zu pre=%zu:%zu",
+ target_length, target_length * 1000 / sample_bps,
+ max_length, max_length * 1000 / sample_bps,
+ prebuf_size, prebuf_size * 1000 / sample_bps);
+ dbg0(" u_sd=%zu u_fsz=%zu:%zu u_maxf=%zu",
+ user_subdivision, user_frag_size,
+ user_frag_size * 1000 / sample_bps, user_max_frags);
+
+ channel_map = pa_channel_map_init_auto(&channel_map_stor,
+ sample_spec.channels,
+ PA_CHANNEL_MAP_OSS);
+
+ s = pa_stream_new(context, stream_name, &sample_spec,
+ channel_map);
+ if (!s) {
+ err_pa("can't create streams");
+ goto fail;
+ }
+ stream[dir] = s;
+
+ pa_stream_set_state_callback(s, stream_state_callback, NULL);
+ if (dir == PLAY) {
+ pa_stream_set_write_callback(s,
+ stream_rw_callback, NULL);
+ pa_stream_set_underflow_callback(s,
+ stream_underflow_callback, NULL);
+ } else {
+ pa_stream_set_read_callback(s,
+ stream_rw_callback, NULL);
+ pa_stream_set_overflow_callback(s,
+ stream_overflow_callback, NULL);
+ }
+
+ flags = PA_STREAM_AUTO_TIMING_UPDATE |
+ PA_STREAM_INTERPOLATE_TIMING;
+ if (stream_corked[dir])
+ flags |= PA_STREAM_START_CORKED;
+
+ new_ba.maxlength = max_length;
+ new_ba.tlength = target_length;
+ new_ba.prebuf = prebuf_size;
+ new_ba.minreq = frag_size;
+ new_ba.fragsize = frag_size;
+
+ if (dir == PLAY) {
+ if (pa_stream_connect_playback(s, NULL, &new_ba, flags,
+ NULL, NULL)) {
+ err_pa("failed to connect playback stream");
+ goto fail;
+ }
+ } else {
+ if (pa_stream_connect_record(s, NULL, &new_ba, flags)) {
+ err_pa("failed to connect record stream");
+ goto fail;
+ }
+ }
+
+ while (pa_stream_get_state(s) == PA_STREAM_CREATING)
+ pa_threaded_mainloop_wait(mainloop);
+ if (pa_stream_get_state(s) != PA_STREAM_READY) {
+ err_pa("failed to connect stream (state=%d)",
+ pa_stream_get_state(s));
+ goto fail;
+ }
+
+ /* apply stored OSS volume */
+ memcpy(vol, stored_oss_vol[dir], sizeof(vol));
+ if (do_mixer(dir, vol))
+ warn_pa("initial volume control failed");
+
+ /* stream is ready setup mmap stuff */
+ if (!mmap_map[dir])
+ continue;
+
+ /* prep mmap staging buffer */
+ size = round_up(sp->mmap_staging * sample_bps / 1000,
+ frag_size);
+ rc = ring_resize(&mmap_stg[dir], size);
+ if (rc)
+ return rc;
+
+ mmap_idx[dir] = mmap_last_idx[dir] = get_mmap_idx(dir);
+ mmap_lead[dir] = round_up(sp->mmap_lead * sample_bps / 1000,
+ frame_size);
+ mmap_sync[dir] = 1;
+
+ /* apply the current trigger settings */
+ trigger_streams(-1, -1);
+ }
+
+ return 0;
+ fail:
+ return padsp_done();
+}
+
+struct volume_ret {
+ int success;
+ pa_cvolume *cv;
+};
+
+static void play_volume_callback(pa_context *c, const pa_sink_input_info *i,
+ int eol, void *userdata)
+{
+ struct volume_ret *vr = userdata;
+
+ if (i) {
+ *vr->cv = i->volume;
+ vr->success = 1;
+ }
+ pa_threaded_mainloop_signal(mainloop, 0);
+}
+
+static void rec_volume_callback(pa_context *c, const pa_source_info *i,
+ int eol, void *userdata)
+{
+ struct volume_ret *vr = userdata;
+
+ if (i) {
+ *vr->cv = i->volume;
+ vr->success = 1;
+ }
+ pa_threaded_mainloop_signal(mainloop, 0);
+}
+
+static int get_volume(int dir, pa_cvolume *cv)
+{
+ struct volume_ret vr = { .cv = cv };
+ uint32_t idx;
+
+ if (dir == PLAY) {
+ idx = pa_stream_get_index(stream[PLAY]);
+ EXEC_OP(pa_context_get_sink_input_info,
+ context, idx, play_volume_callback, &vr);
+ } else {
+ idx = pa_stream_get_device_index(stream[REC]);
+ EXEC_OP(pa_context_get_source_info_by_index,
+ context, idx, rec_volume_callback, &vr);
+ }
+ if (!vr.success) {
+ warn_pa("failed to get %s volume", dir_str[dir]);
+ return -EIO;
+ }
+ return 0;
+}
+
+static int set_volume(int dir, pa_cvolume *cv)
+{
+ uint32_t idx;
+ int rc;
+
+ if (dir == PLAY) {
+ idx = pa_stream_get_index(stream[PLAY]);
+ rc = EXEC_CONTEXT_OP(pa_context_set_sink_input_volume,
+ context, idx, cv);
+ } else {
+ idx = pa_stream_get_device_index(stream[REC]);
+ rc = EXEC_CONTEXT_OP(pa_context_set_source_volume_by_index,
+ context, idx, cv);
+ }
+ return rc;
+}
+
+static int chan_left_right(int ch)
+{
+ if (!channel_map || channel_map->channels <= ch) {
+ switch (ch) {
+ case 0:
+ return LEFT;
+ case 1:
+ return RIGHT;
+ default:
+ return -1;
+ }
+ }
+
+ switch (channel_map->map[ch]) {
+ /*case PA_CHANNEL_POSITION_LEFT:*/ /* same as FRONT_LEFT */
+ case PA_CHANNEL_POSITION_FRONT_LEFT:
+ case PA_CHANNEL_POSITION_REAR_LEFT:
+ case PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER:
+ case PA_CHANNEL_POSITION_SIDE_LEFT:
+ case PA_CHANNEL_POSITION_TOP_FRONT_LEFT:
+ case PA_CHANNEL_POSITION_TOP_REAR_LEFT:
+ return LEFT;
+ /*case PA_CHANNEL_POSITION_RIGHT:*/ /* same as FRONT_RIGHT */
+ case PA_CHANNEL_POSITION_FRONT_RIGHT:
+ case PA_CHANNEL_POSITION_REAR_RIGHT:
+ case PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER:
+ case PA_CHANNEL_POSITION_SIDE_RIGHT:
+ case PA_CHANNEL_POSITION_TOP_FRONT_RIGHT:
+ case PA_CHANNEL_POSITION_TOP_REAR_RIGHT:
+ return RIGHT;
+ default:
+ return -1;
+ }
+}
+
+static int do_mixer(int dir, int *vol)
+{
+ pa_cvolume cv;
+ unsigned lv, rv;
+ int i, rc;
+
+ if (vol[0] >= 0) {
+ int avg;
+
+ stored_oss_vol[dir][LEFT] = vol[LEFT];
+ stored_oss_vol[dir][RIGHT] = vol[RIGHT];
+ vol[LEFT] = vol[LEFT] * PA_VOLUME_NORM / 100;
+ vol[RIGHT] = vol[RIGHT] * PA_VOLUME_NORM / 100;
+ avg = (vol[LEFT] + vol[RIGHT]) / 2;
+
+ pa_cvolume_mute(&cv, sample_spec.channels);
+
+ for (i = 0; i < cv.channels; i++)
+ switch (chan_left_right(i)) {
+ case LEFT: cv.values[i] = vol[LEFT]; break;
+ case RIGHT: cv.values[i] = vol[RIGHT]; break;
+ default: cv.values[i] = avg; break;
+ }
+
+ rc = set_volume(dir, &cv);
+ if (rc)
+ return rc;
+ }
+
+ rc = get_volume(dir, &cv);
+ if (rc)
+ return rc;
+
+ if (cv.channels == 1)
+ lv = rv = pa_cvolume_avg(&cv);
+ else {
+ unsigned lcnt = 0, rcnt = 0;
+
+ for (i = 0, lv = 0, rv = 0; i < cv.channels; i++)
+ switch (chan_left_right(i)) {
+ case LEFT: lv += cv.values[i]; lcnt++; break;
+ case RIGHT: rv += cv.values[i]; rcnt++; break;
+ }
+
+ if (lcnt)
+ lv /= lcnt;
+ if (rcnt)
+ rv /= rcnt;
+ }
+
+ vol[LEFT] = lv * 100 / PA_VOLUME_NORM;
+ vol[RIGHT] = rv * 100 / PA_VOLUME_NORM;
+
+ return 0;
+}
+
+static ssize_t padsp_mixer(enum ossp_opcode opcode,
+ void *carg, void *din, size_t din_sz,
+ void *rarg, void *dout, size_t *dout_szp, int tfd)
+{
+ struct ossp_mixer_arg *arg = carg;
+ int i, rc[2] = { };
+
+ if (prepare_streams())
+ return -EIO;
+
+ for (i = 0; i < 2; i++)
+ if (stream[i])
+ rc[i] = do_mixer(i, arg->vol[i]);
+ else
+ memset(arg->vol[i], -1, sizeof(arg->vol[i]));
+
+ *(struct ossp_mixer_arg *)rarg = *arg;
+ return rc[0] ?: rc[1];
+}
+
+static void context_state_callback(pa_context *cxt, void *userdata)
+{
+ pa_threaded_mainloop_signal(mainloop, 0);
+}
+
+static void context_subscribe_callback(pa_context *context,
+ pa_subscription_event_type_t type,
+ uint32_t idx, void *userdata)
+{
+ struct ossp_notify event = { .magic = OSSP_NOTIFY_MAGIC,
+ .opcode = OSSP_NOTIFY_VOLCHG };
+ ssize_t ret;
+
+ if ((type & PA_SUBSCRIPTION_EVENT_TYPE_MASK) !=
+ PA_SUBSCRIPTION_EVENT_CHANGE)
+ return;
+
+ ret = write(ossp_notify_fd, &event, sizeof(event));
+ if (ret != sizeof(event) && errno != EPIPE)
+ warn_e(-errno, "write to notify_fd failed");
+}
+
+static ssize_t padsp_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;
+ char host_name[128] = "(unknown)", opener[128] = "(unknown)";
+ int state;
+
+ switch (arg->flags & O_ACCMODE) {
+ case O_WRONLY:
+ stream_enabled[PLAY] = 1;
+ break;
+ case O_RDONLY:
+ stream_enabled[REC] = 1;
+ break;
+ case O_RDWR:
+ stream_enabled[PLAY] = 1;
+ stream_enabled[REC] = 1;
+ break;
+ default:
+ assert(0);
+ }
+
+ /* determine stream name */
+ gethostname(host_name, sizeof(host_name) - 1);
+ snprintf(stream_name, sizeof(stream_name), "OSS Proxy %s/%s:%ld",
+ host_name, ossp_user_name, (long)arg->opener_pid);
+
+ /* create and connect PA context */
+ get_proc_self_info(arg->opener_pid, NULL, opener, sizeof(opener));
+ context = pa_context_new(mainloop_api, opener);
+ if (!context) {
+ err("pa_context_new() failed");
+ return -EIO;
+ }
+
+ pa_context_set_state_callback(context, context_state_callback, NULL);
+ pa_context_set_subscribe_callback(context, context_subscribe_callback,
+ NULL);
+
+ pa_context_connect(context, NULL, 0, NULL);
+ while (1) {
+ state = pa_context_get_state(context);
+ if (state != PA_CONTEXT_CONNECTING &&
+ state != PA_CONTEXT_AUTHORIZING &&
+ state != PA_CONTEXT_SETTING_NAME)
+ break;
+
+ pa_threaded_mainloop_wait(mainloop);
+ }
+
+ if (EXEC_CONTEXT_OP(pa_context_subscribe, context,
+ PA_SUBSCRIPTION_MASK_SINK_INPUT |
+ PA_SUBSCRIPTION_MASK_SOURCE))
+ warn_pa("failed to subscribe to context events");
+
+ if (state != PA_CONTEXT_READY) {
+ err_pa("failed to connect context, state=%d", state);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static void mmap_fill_pstg(void)
+{
+ struct ring_buf *stg = &mmap_stg[PLAY];
+ struct ring_buf mmap;
+ uint64_t new_idx = get_mmap_idx(PLAY);
+ size_t bytes, space, size;
+ void *data;
+
+ if (new_idx <= mmap_idx[PLAY])
+ return;
+
+ bytes = new_idx - mmap_idx[PLAY];
+ space = ring_space(stg);
+
+ if (bytes > mmap_size) {
+ dbg0("mmap playback transfer chunk bigger than "
+ "mmap size (bytes=%zu mmap_size=%zu)", bytes, mmap_size);
+ mmap_sync[PLAY] = 1;
+ bytes = mmap_size;
+ }
+
+ if (bytes > space) {
+ dbg0("mmap playback staging buffer overflow "
+ "(bytes=%zu space=%zu)", bytes, space);
+ mmap_sync[PLAY] = 1;
+ bytes = space;
+ }
+
+ ring_manual_init(&mmap, mmap_map[PLAY], mmap_size,
+ new_idx % mmap_size, bytes);
+
+ while ((data = ring_data(&mmap, &size))) {
+ ring_fill(stg, data, size);
+ ring_consume(&mmap, size);
+ }
+
+ mmap_idx[PLAY] = new_idx;
+}
+
+static void mmap_consume_rstg(void)
+{
+ struct ring_buf *stg = &mmap_stg[REC];
+ struct ring_buf mmap;
+ uint64_t new_idx = get_mmap_idx(REC);
+ uint64_t fill_idx = mmap_idx[REC];
+ size_t bytes, space;
+
+ if (new_idx <= mmap_idx[REC])
+ return;
+
+ space = new_idx - mmap_idx[REC]; /* mmapped space to fill in */
+ bytes = ring_bytes(stg); /* recorded bytes in staging */
+
+ if (space > bytes) {
+ if (!mmap_sync[REC])
+ dbg0("mmap recording staging buffer underflow "
+ "(space=%zu bytes=%zu)", space, bytes);
+ mmap_sync[REC] = 1;
+ }
+
+ if (space > mmap_size) {
+ if (!mmap_sync[REC])
+ dbg0("mmap recording transfer chunk bigger than "
+ "mmap size (space=%zu mmap_size=%zu)",
+ bytes, mmap_size);
+ mmap_sync[REC] = 1;
+ space = mmap_size;
+ }
+
+ /* If resync is requested, leave lead bytes in the staging
+ * buffer and copy everything else such that data is filled
+ * upto the new_idx. If there are more bytes in staging than
+ * available space, those will be dropped.
+ */
+ if (mmap_sync[REC]) {
+ ssize_t avail = bytes - mmap_lead[REC];
+
+ /* make sure we always have lead bytes in staging */
+ if (avail < 0)
+ goto skip;
+
+ if (avail > space) {
+ dbg0("dropping %zu bytes from record staging buffer",
+ avail - space);
+ ring_consume(&mmap_stg[REC], avail - space);
+ avail = space;
+ } else {
+ dbg0("skippping %zu bytes in record mmap map",
+ space - avail);
+ space = avail;
+ }
+
+ assert(new_idx >= avail);
+ fill_idx = new_idx - avail;
+ mmap_sync[REC] = 0;
+ }
+
+ ring_manual_init(&mmap, mmap_map[REC], mmap_size,
+ fill_idx % mmap_size, 0);
+
+ while (space) {
+ void *data;
+ size_t size, todo;
+
+ data = ring_data(stg, &size);
+ assert(data);
+
+ todo = min(size, space);
+ ring_fill(&mmap, data, todo);
+
+ ring_consume(stg, todo);
+ space -= todo;
+ }
+
+ skip:
+ mmap_idx[REC] = new_idx;
+}
+
+static void do_mmap_write(size_t space)
+{
+ struct ring_buf *stg = &mmap_stg[PLAY];
+ size_t todo;
+ void *data;
+
+ space = round_down(space, frame_size);
+ mmap_fill_pstg();
+
+ while (space && (data = ring_data(stg, &todo))) {
+ pa_seek_mode_t mode = PA_SEEK_RELATIVE_END;
+ int64_t offset = 0;
+
+ todo = min(todo, space);
+
+ if (mmap_sync[PLAY]) {
+ mode = PA_SEEK_RELATIVE_ON_READ;
+ offset = (int64_t)mmap_lead[PLAY] - ring_bytes(stg);
+ dbg0("mmap resync, offset=%ld", (long)offset);
+ }
+
+ if (pa_stream_write(stream[PLAY], data, todo, NULL,
+ offset, mode) < 0) {
+ err_pa("pa_stream_write() failed");
+ padsp_done();
+ return;
+ }
+
+ mmap_sync[PLAY] = 0;
+ ring_consume(stg, todo);
+ space -= todo;
+ }
+}
+
+static void do_mmap_read(size_t bytes)
+{
+ struct ring_buf *stg = &mmap_stg[REC];
+
+ bytes = round_down(bytes, frame_size);
+ mmap_consume_rstg();
+
+ while (bytes) {
+ const void *peek_data;
+ size_t size;
+
+ if (pa_stream_peek(stream[REC], &peek_data, &size)) {
+ err_pa("pa_stream_peek() failed");
+ padsp_done();
+ return;
+ }
+
+ if (!peek_data)
+ break;
+
+ if (size <= ring_space(stg))
+ ring_fill(stg, peek_data, size);
+ else {
+ if (!mmap_sync[REC])
+ dbg0("recording staging buffer overflow, "
+ "requesting resync");
+ mmap_sync[REC] = 1;
+ }
+
+ pa_stream_drop(stream[REC]);
+ bytes -= size;
+ }
+}
+
+static void stream_rw_callback(pa_stream *s, size_t length, void *userdata)
+{
+ int dir;
+ size_t size;
+
+ if (s == stream[PLAY]) {
+ dir = PLAY;
+ size = pa_stream_writable_size(s);
+ if (mmap_map[PLAY])
+ do_mmap_write(size);
+ } else if (s == stream[REC]) {
+ dir = REC;
+ size = pa_stream_readable_size(s);
+ if (mmap_map[REC])
+ do_mmap_read(size);
+ } else {
+ dbg0("stream_rw_callback(): unknown stream %p PLAY/REC=%p/%p\n",
+ s, stream[PLAY], stream[REC]);
+ return;
+ }
+
+ if (size < user_frag_size)
+ return;
+ if (stream_waiting)
+ pa_threaded_mainloop_signal(mainloop, 0);
+ if (stream_notify) {
+ struct ossp_notify event = { .magic = OSSP_NOTIFY_MAGIC,
+ .opcode = OSSP_NOTIFY_POLL };
+ ssize_t ret;
+
+ ret = write(ossp_notify_fd, &event, sizeof(event));
+ if (ret != sizeof(event)) {
+ if (errno != EPIPE)
+ err_e(-errno, "write to notify_fd failed");
+
+ /* This function is run from PA mainloop and
+ * thus the following padsp_done() won't be
+ * noticed before the mainthread tries to run
+ * the next command. Well, that's good enough.
+ */
+ padsp_done();
+ }
+ stream_notify = 0;
+ }
+}
+
+static ssize_t padsp_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;
+ size_t size;
+
+ if (prepare_streams() || !stream[PLAY])
+ return -EIO;
+
+ stream_waiting++;
+ while (1) {
+ size = pa_stream_writable_size(stream[PLAY]);
+ if (arg->nonblock || size >= user_frag_size)
+ break;
+ pa_threaded_mainloop_wait(mainloop);
+ }
+ stream_waiting--;
+
+ size = round_down(size, user_frag_size);
+ if (!size)
+ return -EAGAIN;
+
+ size = min(size, din_sz);
+
+ if (pa_stream_write(stream[PLAY], din, size, NULL,
+ 0, PA_SEEK_RELATIVE) < 0) {
+ err_pa("pa_stream_write() failed");
+ return padsp_done();
+ }
+
+ return size;
+}
+
+static ssize_t padsp_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;
+ size_t size;
+ void *data;
+
+ if (prepare_streams() || !stream[REC])
+ return -EIO;
+ again:
+ if (!arg->nonblock) {
+ stream_waiting++;
+ while (1) {
+ size = pa_stream_readable_size(stream[REC]);
+ if (size + ring_bytes(&rec_buf) >= user_frag_size)
+ break;
+ pa_threaded_mainloop_wait(mainloop);
+ }
+ stream_waiting--;
+ }
+
+ while (ring_bytes(&rec_buf) < max(user_frag_size, *dout_szp)) {
+ const void *peek_data;
+
+ if (pa_stream_peek(stream[REC], &peek_data, &size) < 0) {
+ err_pa("pa_stream_peek() failed");
+ return padsp_done();
+ }
+
+ if (!peek_data)
+ break;
+
+ if (ring_space(&rec_buf) < size) {
+ size_t bufsz;
+
+ bufsz = ring_size(&rec_buf);
+ bufsz = max(2 * bufsz, bufsz + 2 * size);
+
+ if (ring_resize(&rec_buf, bufsz)) {
+ err("failed to allocate recording buffer");
+ return padsp_done();
+ }
+ }
+
+ ring_fill(&rec_buf, peek_data, size);
+ pa_stream_drop(stream[REC]);
+ }
+
+ size = round_down(ring_bytes(&rec_buf), user_frag_size);
+ if (!size) {
+ if (arg->nonblock)
+ return -EAGAIN;
+ else
+ goto again;
+ }
+
+ *dout_szp = size = min(size, *dout_szp);
+
+ while (size) {
+ size_t cnt;
+
+ data = ring_data(&rec_buf, &cnt);
+ assert(data);
+
+ cnt = min(size, cnt);
+ memcpy(dout, data, cnt);
+ ring_consume(&rec_buf, cnt);
+ dout += cnt;
+ size -= cnt;
+ }
+
+ return *dout_szp;
+}
+
+static ssize_t padsp_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;
+
+ if (prepare_streams() < 0)
+ return -EIO;
+
+ stream_notify |= *(int *)carg;
+
+ if (stream[PLAY] &&
+ pa_stream_writable_size(stream[PLAY]) >= user_frag_size)
+ revents |= POLLOUT;
+ if (stream[REC] &&
+ pa_stream_readable_size(stream[REC]) >= user_frag_size)
+ revents |= POLLIN;
+
+ *(unsigned *)rarg = revents;
+ return 0;
+}
+
+static ssize_t padsp_mmap(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_mmap_arg *arg = carg;
+ int dir = arg->dir;
+
+ assert(!mmap_map[dir]);
+
+ kill_streams();
+
+ /* arg->size is rounded up to the nearest page boundary.
+ * There is no way to tell what the actual requested value is
+ * but assume that it was the reported buffer space if it
+ * falls into the same page aligned range.
+ */
+ mmap_raw_size = arg->size;
+ if (user_max_length && user_max_length < mmap_raw_size &&
+ round_up(mmap_raw_size, page_size) ==
+ round_up(user_max_length, page_size)) {
+ info("MMAP adjusting raw_size %zu -> %zu",
+ mmap_raw_size, user_max_length);
+ mmap_raw_size = user_max_length;
+ }
+
+ dbg0("MMAP server-addr=%p sz=%zu", ossp_mmap_addr[dir], mmap_raw_size);
+
+ mmap_map[dir] = ossp_mmap_addr[dir];
+
+ /* if mmapped, only mmapped streams are enabled */
+ stream_enabled[PLAY] = !!mmap_map[PLAY];
+ stream_enabled[REC] = !!mmap_map[REC];
+
+ return 0;
+}
+
+static ssize_t padsp_munmap(enum ossp_opcode opcode,
+ void *carg, void *din, size_t din_sz,
+ void *rarg, void *dout, size_t *dout_szp, int tfd)
+{
+ int dir = *(int *)carg;
+
+ assert(mmap_map[dir]);
+ kill_streams();
+ mmap_map[dir] = NULL;
+ return 0;
+}
+
+static ssize_t padsp_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 padsp_post(enum ossp_opcode opcode,
+ void *carg, void *din, size_t din_sz,
+ void *rarg, void *dout, size_t *dout_szp, int tfd)
+{
+ return trigger_streams(1, -1);
+}
+
+static ssize_t padsp_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:
+ v = sample_spec.rate;
+ break;
+
+ case OSSP_DSP_GET_CHANNELS:
+ v = sample_spec.channels;
+ break;
+
+ case OSSP_DSP_GET_FORMAT:
+ v = fmt_pa_to_oss(sample_spec.format);
+ break;
+
+ case OSSP_DSP_GET_BLKSIZE:
+ if (prepare_streams() < 0)
+ return -EIO;
+ v = user_frag_size;
+ 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 padsp_set_param(enum ossp_opcode opcode,
+ void *carg, void *din, size_t din_sz,
+ void *rarg, void *dout, size_t *dout_szp,
+ int tfd)
+{
+ pa_sample_spec new_spec = sample_spec;
+ int v = *(int *)carg;
+
+ /* kill the streams before changing parameters */
+ kill_streams();
+
+ switch (opcode) {
+ case OSSP_DSP_SET_RATE:
+ new_spec.rate = v;
+ if (pa_sample_spec_valid(&new_spec))
+ sample_spec = new_spec;
+ v = sample_spec.rate;
+ break;
+
+ case OSSP_DSP_SET_CHANNELS:
+ new_spec.channels = v;
+ if (pa_sample_spec_valid(&new_spec))
+ sample_spec = new_spec;
+ v = sample_spec.channels;
+ break;
+
+ case OSSP_DSP_SET_FORMAT:
+ new_spec.format = fmt_oss_to_pa(v);
+ if (pa_sample_spec_valid(&new_spec))
+ sample_spec = new_spec;
+ v = fmt_pa_to_oss(sample_spec.format);
+ break;
+
+ case OSSP_DSP_SET_SUBDIVISION:
+ 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;
+ break;
+ default:
+ assert(0);
+ }
+
+ if (rarg)
+ *(int *)rarg = v;
+ return 0;
+}
+
+static ssize_t padsp_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;
+
+ return trigger_streams(enable & PCM_ENABLE_OUTPUT,
+ enable & PCM_ENABLE_INPUT);
+}
+
+static ssize_t padsp_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;
+ struct audio_buf_info info = { };
+ int rc;
+
+ rc = prepare_streams();
+ if (rc)
+ return -EIO;
+
+ if (mmapped()) {
+ info.fragments = mmap_raw_size / user_frag_size;
+ info.fragstotal = info.fragments;
+ info.fragsize = user_frag_size;
+ info.bytes = mmap_raw_size;
+ } else {
+ size_t space;
+
+ if (dir == PLAY)
+ space = pa_stream_writable_size(stream[PLAY]);
+ else
+ space = pa_stream_readable_size(stream[REC]);
+
+ space = round_down(space, user_frag_size);
+ space = min(space, user_frag_size * user_max_frags);
+
+ info.fragments = space / user_frag_size;
+ info.fragstotal = user_max_frags;
+ info.fragsize = user_frag_size;
+ info.bytes = space;
+ }
+
+ *(struct audio_buf_info *)rarg = info;
+ return 0;
+}
+
+static ssize_t padsp_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 (prepare_streams() < 0 || !stream[dir])
+ return -EIO;
+
+ if (mmap_map[dir]) {
+ /* mmap operation in progress, report mmap buffer parameters */
+ if (dir == PLAY)
+ mmap_fill_pstg();
+ else
+ mmap_consume_rstg();
+
+ info.bytes = mmap_idx[dir];
+ info.blocks = (mmap_idx[dir] - mmap_last_idx[dir]) / frame_size;
+ info.ptr = mmap_idx[dir] % mmap_size;
+
+ mmap_last_idx[dir] = mmap_idx[dir];
+ } else {
+ /* simulate pointers using timestamps */
+ double bpus = (double)sample_bps / 1000000;
+ size_t bytes, delta_bytes;
+ pa_usec_t usec, delta;
+
+ if (pa_stream_get_time(stream[dir], &usec) < 0) {
+ warn_pa("pa_stream_get_time() failed");
+ return -EIO;
+ }
+
+ delta = usec - stream_ptr_timestamp[dir];
+ stream_ptr_timestamp[dir] = usec;
+ bytes = bpus * usec;
+ delta_bytes = bpus * delta;
+
+ info.bytes = bytes & INT_MAX;
+ info.blocks = (delta_bytes + frame_size - 1) / frame_size;
+ info.ptr = bytes % user_max_length;
+ }
+
+ *(struct count_info *)rarg = info;
+ return 0;
+}
+
+static ssize_t padsp_get_odelay(enum ossp_opcode opcode,
+ void *carg, void *din, size_t din_sz,
+ void *rarg, void *dout, size_t *dout_szp,
+ int fd)
+{
+ double bpus = (double)sample_bps / 1000000;
+ pa_usec_t usec;
+
+ if (prepare_streams() < 0 || !stream[PLAY])
+ return -EIO;
+
+ if (pa_stream_get_latency(stream[PLAY], &usec, NULL) < 0) {
+ warn_pa("pa_stream_get_latency() failed");
+ return -EIO;
+ }
+
+ *(int *)rarg = bpus * usec;
+ return 0;
+}
+
+static ossp_action_fn_t action_fn_tbl[OSSP_NR_OPCODES] = {
+ [OSSP_MIXER] = padsp_mixer,
+ [OSSP_DSP_OPEN] = padsp_open,
+ [OSSP_DSP_READ] = padsp_read,
+ [OSSP_DSP_WRITE] = padsp_write,
+ [OSSP_DSP_POLL] = padsp_poll,
+ [OSSP_DSP_MMAP] = padsp_mmap,
+ [OSSP_DSP_MUNMAP] = padsp_munmap,
+ [OSSP_DSP_RESET] = padsp_flush,
+ [OSSP_DSP_SYNC] = padsp_flush,
+ [OSSP_DSP_POST] = padsp_post,
+ [OSSP_DSP_GET_RATE] = padsp_get_param,
+ [OSSP_DSP_GET_CHANNELS] = padsp_get_param,
+ [OSSP_DSP_GET_FORMAT] = padsp_get_param,
+ [OSSP_DSP_GET_BLKSIZE] = padsp_get_param,
+ [OSSP_DSP_GET_FORMATS] = padsp_get_param,
+ [OSSP_DSP_SET_RATE] = padsp_set_param,
+ [OSSP_DSP_SET_CHANNELS] = padsp_set_param,
+ [OSSP_DSP_SET_FORMAT] = padsp_set_param,
+ [OSSP_DSP_SET_SUBDIVISION] = padsp_set_param,
+ [OSSP_DSP_SET_FRAGMENT] = padsp_set_param,
+ [OSSP_DSP_GET_TRIGGER] = padsp_get_param,
+ [OSSP_DSP_SET_TRIGGER] = padsp_set_trigger,
+ [OSSP_DSP_GET_OSPACE] = padsp_get_space,
+ [OSSP_DSP_GET_ISPACE] = padsp_get_space,
+ [OSSP_DSP_GET_OPTR] = padsp_get_ptr,
+ [OSSP_DSP_GET_IPTR] = padsp_get_ptr,
+ [OSSP_DSP_GET_ODELAY] = padsp_get_odelay,
+};
+
+static int action_pre(void)
+{
+ pa_threaded_mainloop_lock(mainloop);
+ if (fail_code) {
+ pa_threaded_mainloop_unlock(mainloop);
+ return fail_code;
+ }
+ return 0;
+}
+
+static void action_post(void)
+{
+ pa_threaded_mainloop_unlock(mainloop);
+}
+
+int main(int argc, char **argv)
+{
+ int rc;
+
+ ossp_slave_init(argc, argv);
+
+ page_size = sysconf(_SC_PAGE_SIZE);
+
+ mainloop = pa_threaded_mainloop_new();
+ if (!mainloop) {
+ err("failed to allocate mainloop");
+ return 1;
+ }
+ mainloop_api = pa_threaded_mainloop_get_api(mainloop);
+
+ if (pa_threaded_mainloop_start(mainloop)) {
+ err("pa_mainloop_start() failed");
+ return 1;
+ }
+
+ /* 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 && !fail_code);
+ if (rc)
+ fail_code = rc;
+
+ pa_threaded_mainloop_lock(mainloop);
+
+ kill_streams();
+ if (context) {
+ pa_context_disconnect(context);
+ pa_context_unref(context);
+ }
+
+ pa_threaded_mainloop_unlock(mainloop);
+
+ pa_threaded_mainloop_stop(mainloop);
+ pa_threaded_mainloop_free(mainloop);
+
+ return fail_code ? 1 : 0;
+}
--- /dev/null
+/*
+ * 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;
+}
--- /dev/null
+/*
+ * 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 */
--- /dev/null
+/*
+ * 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;
+}
--- /dev/null
+/*
+ * 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*/
--- /dev/null
+/*
+ * 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",
+};
--- /dev/null
+/*
+ * 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 */
--- /dev/null
+/*
+ * 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.
+ */
+
+#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, "%s carg=%zu din=%zu rarg=%zu dout=%zu",
+ ossp_cmd_str[opcode], carg_size, din_size, rarg_size,
+ dout_size);
+
+ 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;
+ }
+
+out_unlock:
+ dbg1_os(os, " completed, result=%d dout=%zu",
+ reply.result, dout_size);
+ 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,
+ ¬_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(¬ify_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);
+}
+
+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);
+
+ 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);
+ }
+
+ /* 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, ¬ify, &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,
+ ¬ify, 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(¬ify_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, ¶m, 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");
+
+ /* 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);
+
+ /* 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(¬ify_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");
+
+ /* 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);
+
+ 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");
+
+ 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);
+
+ info("Creating %s (%d:%d)%s%s", param.dsp_name, param.dsp_major,
+ param.dsp_minor, adsp_buf, mixer_buf);
+
+ /* 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");
+ }
+
+ /* 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;
+}
--- /dev/null
+/* Simple oss testsuite
+ *
+ * Copyright (C) 2009 Maarten Lankhorst <m.b.lankhorst@gmail.com>
+ *
+ * This file is released under the GPLv2.
+ */
+
+#include <sys/types.h>
+#include <sys/soundcard.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <poll.h>
+#include <sys/mman.h>
+#include <stdlib.h>
+
+#define MIXERDEV "/dev/mixer"
+#define DSPDEV "/dev/dsp"
+
+/* Test macros */
+
+static int errors, success;
+static int report_success = 1;
+
+#define ok(a, b, c...) do { \
+ if (!(a)) { \
+ fprintf(stderr, "%s@%d test failed (%s): " b "\n", __func__, __LINE__, #a, ##c); \
+ ++errors; \
+ } else { \
+ if (report_success) \
+ printf("%s@%d test succeeded (%s)\n", __func__, __LINE__, #a); \
+ ++success; \
+ } } while (0)
+
+static int mixerfd, dspfd;
+
+static int reopen(int blocking)
+{
+ close(dspfd);
+ if (!blocking)
+ blocking = O_NDELAY;
+ else
+ blocking = 0;
+ dspfd = open(DSPDEV, O_RDWR|blocking);
+ return dspfd;
+}
+
+static void test_ro(int fd)
+{
+ int ret;
+ char buf[1024];
+ struct audio_buf_info abi;
+ memset(buf, 0, sizeof(buf));
+
+ ret = read(fd, buf, sizeof(buf));
+ ok(ret >= 0, "%s", strerror(errno));
+
+ ret = write(fd, buf, sizeof(buf));
+ ok(ret < 0, "read %d bytes", ret);
+
+ ret = ioctl(fd, SNDCTL_DSP_GETISPACE, &abi);
+ ok(ret >= 0, "%s", strerror(errno));
+
+ ret = ioctl(fd, SNDCTL_DSP_GETOSPACE, &abi);
+ ok(ret < 0, "%s", strerror(errno));
+ if (ret < 0)
+ ok(errno == EINVAL, "Invalid errno: %s", strerror(errno));
+}
+
+static void test_wo(int fd)
+{
+ int ret;
+ char buf[1024];
+ struct audio_buf_info abi;
+ memset(buf, 0, sizeof(buf));
+
+ ret = read(fd, buf, sizeof(buf));
+ ok(ret < 0, "read %d bytes", ret);
+
+ ret = write(fd, buf, sizeof(buf));
+ ok(ret >= 0, "%s", strerror(errno));
+
+ ret = ioctl(fd, SNDCTL_DSP_GETISPACE, &abi);
+ ok(ret < 0, "%s", strerror(errno));
+ if (ret < 0)
+ ok(errno == EINVAL, "Invalid errno: %s", strerror(errno));
+
+ ret = ioctl(fd, SNDCTL_DSP_GETOSPACE, &abi);
+ ok(ret >= 0, "%s", strerror(errno));
+}
+
+static void test_rw(int fd)
+{
+ int ret;
+ char buf[1024];
+ struct audio_buf_info abi;
+ memset(buf, 0, sizeof(buf));
+
+ ret = read(fd, buf, sizeof(buf));
+ ok(ret >= 0, "%s", strerror(errno));
+
+ ret = write(fd, buf, sizeof(buf));
+ ok(ret >= 0, "%s", strerror(errno));
+
+ ret = ioctl(fd, SNDCTL_DSP_GETISPACE, &abi);
+ ok(ret >= 0, "%s", strerror(errno));
+
+ ret = ioctl(fd, SNDCTL_DSP_GETOSPACE, &abi);
+ ok(ret >= 0, "%s", strerror(errno));
+}
+
+static void test_open(void)
+{
+ int ro_fd, rw_fd, wo_fd;
+
+ mixerfd = open(MIXERDEV, O_RDONLY|O_NDELAY);
+ ok(mixerfd >= 0, "%s", strerror(errno));
+
+
+ /* In order to make this work it has to be serialized
+ * alsa's kernel emulation can only have device open once
+ * so do some specific smokescreen tests here
+ * and then open dsp for testing
+ */
+ ro_fd = open(DSPDEV, O_RDONLY);
+ ok(ro_fd >= 0, "%s", strerror(errno));
+
+ if (ro_fd >= 0)
+ test_ro(ro_fd);
+
+ close(ro_fd);
+
+ wo_fd = open(DSPDEV, O_WRONLY);
+ ok(wo_fd >= 0, "%s", strerror(errno));
+
+ if (wo_fd >= 0)
+ test_wo(wo_fd);
+
+ close(wo_fd);
+
+ rw_fd = open(DSPDEV, O_RDWR);
+ ok(rw_fd >= 0, "%s", strerror(errno));
+
+ if (rw_fd >= 0)
+ test_rw(rw_fd);
+
+ dspfd = rw_fd;
+}
+
+static void test_mixer(void)
+{
+ int ret;
+ struct mixer_info info;
+ memset(&info, 0, sizeof(info));
+
+ ret = ioctl(mixerfd, SOUND_MIXER_INFO, &info);
+ ok(ret >= 0, "%s", strerror(errno));
+ if (ret >= 0) {
+ printf("Mixer id: %s\n", info.id);
+ printf("Name: %s\n", info.name);
+ }
+}
+
+static void test_trigger(int fd)
+{
+ int ret, i;
+
+ ret = ioctl(fd, SNDCTL_DSP_GETTRIGGER, &i);
+ ok(ret == 0, "Returned error %s", strerror(errno));
+ ok(i == (PCM_ENABLE_INPUT|PCM_ENABLE_OUTPUT), "i is set to %d", i);
+
+ i = 0;
+ ret = ioctl(fd, SNDCTL_DSP_SETTRIGGER, &i);
+ ok(ret == 0, "Returned error %s", strerror(errno));
+ ok(i == 0, "Wrong i returned");
+
+ i = PCM_ENABLE_INPUT|PCM_ENABLE_OUTPUT;
+ ret = ioctl(fd, SNDCTL_DSP_SETTRIGGER, &i);
+ ok(ret == 0, "Returned error %s", strerror(errno));
+ ok(i == (PCM_ENABLE_INPUT|PCM_ENABLE_OUTPUT), "i has value %d", i);
+
+ ret = ioctl(fd, SNDCTL_DSP_POST, NULL);
+ ok(ret == 0, "Returned error %s", strerror(errno));
+}
+
+static void test_mmap(int fd)
+{
+ char *area;
+ int ret;
+ char buf[24];
+
+ area = mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ ok(area != MAP_FAILED, "Failed to map: %s\n", strerror(errno));
+
+ if (area == MAP_FAILED)
+ return;
+
+ ret = write(fd, &buf, sizeof(buf));
+ ok(ret == -1, "write after mmap returned %i\n", ret);
+ if (ret == -1)
+ ok(errno == ENXIO, "Error returned is %s\n", strerror(errno));
+
+ munmap(area, 8192);
+}
+
+static void test_notify(int fd)
+{
+ struct audio_buf_info bi;
+ char *bytes = NULL;
+ int ret, written;
+ struct pollfd pfd = { fd, POLLOUT };
+ int rounds = 20;
+
+ ioctl(fd, SNDCTL_DSP_GETOSPACE, &bi);
+
+ bytes = calloc(1, bi.fragsize);
+ written = 0;
+ ok(0, "Fragsize: %i, bytes: %i\n", bi.fragsize, bi.bytes);
+ while (written + bi.fragsize - 1 < bi.bytes)
+ {
+ ret = write(fd, bytes, bi.fragsize);
+ ok(ret == bi.fragsize, "Returned: %i instead of %i\n",
+ ret, bi.fragsize);
+ if (ret > 0)
+ written += ret;
+ };
+
+ while (rounds--)
+ {
+ ret = poll(&pfd, 1, -1);
+ ok(ret > 0, "Poll returned %i\n", ret);
+ if (ret < 0)
+ break;
+ ret = write(fd, bytes, bi.fragsize);
+ if (ret < 0) ret = -errno;
+ ok(ret == bi.fragsize, "Returned: %i instead of %i\n",
+ ret, bi.fragsize);
+ }
+}
+
+int main()
+{
+ test_open();
+ if (mixerfd >= 0)
+ test_mixer();
+
+ if (reopen(1) >= 0)
+ test_trigger(dspfd);
+
+ if (reopen(0) >= 0)
+ test_notify(dspfd);
+
+ if (reopen(1) >= 0)
+ test_mmap(dspfd);
+
+ close(mixerfd);
+ close(dspfd);
+ printf("Tests: %d errors %d success\n", errors, success);
+ return errors > 127 ? 127 : errors;
+}
+
projects / osspd.git / commitdiff