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osspd.c
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osspd.c
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/*
* 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"
#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];
int mmap_fd;
size_t mmap_size;
void *mmap;
void *mmap_addr[2];
struct ossp_transfer *mmap_transfer;
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)
/***************************************************************************
* 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;
fuse_reply_ioctl(req, 0, &info, sizeof(info));
break;
}
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);
fuse_reply_ioctl(req, 0, &info, sizeof(info));
break;
}
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);
fuse_reply_ioctl(req, 0, &i, sizeof(i));
break;
case SOUND_MIXER_WRITE_RECSRC:
fuse_reply_ioctl(req, 0, NULL, 0);
break;
default:
*not_minep = 1;
}
}
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;
fuse_reply_ioctl(req, 0, &i, sizeof(i));
return;
}
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);
if (out_bufsz)
fuse_reply_ioctl(req, 0, &mxcmd.rvol, sizeof(mxcmd.rvol));
else
fuse_reply_ioctl(req, 0, NULL, 0);
return;
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 os_create_shared_memory(struct ossp_stream *os, size_t mmap_size)
{
int rc;
os->mmap_fd = -1;
os->mmap_size = 0;
#ifdef OSSP_MMAP
if (mmap_size) {
char shmname[32];
int fd;
void *p;
sprintf(shmname, "/ossp.%i", getpid());
fd = shm_open(shmname, O_RDWR | O_CREAT | O_EXCL | O_TRUNC,
0600);
if (fd == -1) {
rc = -errno;
warn_ose(os, rc, "failed to open shared memory");
return rc;
}
rc = shm_unlink(shmname);
if (rc == -1) {
rc = -errno;
close(fd);
warn_ose(os, rc, "failed to unlink shared memory");
return rc;
}
rc = ftruncate(fd, mmap_size + 2*sizeof(struct ossp_transfer));
if (rc == -1) {
rc = -errno;
close(fd);
warn_ose(os, rc, "failed to set shared memory size");
return rc;
}
rc = fcntl(fd, F_SETFD, 0); /* reset cloexec */
if (rc == -1) {
rc = -errno;
close(fd);
warn_ose(os, rc, "failed to reset close-on-exec for shared memory");
return rc;
}
p = mmap(NULL, mmap_size + 2 * sizeof(struct ossp_transfer),
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (p == MAP_FAILED) {
rc = -errno;
close(fd);
warn_ose(os, rc, "failed to mmap shared memory");
return rc;
}
os->mmap_addr[PLAY] = p;
os->mmap_addr[REC] = p + mmap_size / 2;
os->mmap_transfer = p + mmap_size;
if (sem_init(&os->mmap_transfer[PLAY].sem, 1, 0) == -1 ||
sem_init(&os->mmap_transfer[REC].sem, 1, 0) == -1) {
rc = -errno;
close(fd);
munmap(p, mmap_size + 2 * sizeof(struct ossp_transfer));
warn_ose(os, rc, "failed to init shared semaphore");
return rc;
}
os->mmap = p;
os->mmap_size = mmap_size;
os->mmap_fd = fd;
#endif
}
return 0;
}
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)