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Subject[PATCH v7 4/9] ALSA: Avoid using timespec for struct snd_pcm_status
Date
From: Baolin Wang <baolin.wang@linaro.org>

The struct snd_pcm_status will use 'timespec' type variables to record
timestamp, which is not year 2038 safe on 32bits system.

Userspace will use SNDRV_PCM_IOCTL_STATUS and SNDRV_PCM_IOCTL_STATUS_EXT
as commands to issue ioctl() to fill the 'snd_pcm_status' structure in
userspace. The command number is always defined through _IOR/_IOW/IORW,
so when userspace changes the definition of 'struct timespec' to use
64-bit types, the command number also changes.

Thus in the kernel, we now need to define two versions of each such ioctl
and corresponding ioctl commands to handle 32bit time_t and 64bit time_t
in native mode:
struct snd_pcm_status32 {
......

s32 trigger_tstamp_sec;
s32 trigger_tstamp_nsec;

......

s32 audio_tstamp_sec;
s32 audio_tstamp_nsec;

......
};

struct snd_pcm_status64 {
......

s32 trigger_tstamp_sec;
s32 trigger_tstamp_nsec;

......

s32 audio_tstamp_sec;
s32 audio_tstamp_nsec;

......
};

Moreover in compat file, we renamed or introduced new structures to handle
32bit/64bit time_t in compatible mode. The 'struct snd_pcm_status32' and
snd_pcm_status_user32() are used to handle 32bit time_t in compat mode.
'struct compat_snd_pcm_status64' and snd_pcm_status_user_compat64() are used
to handle 64bit time_t.

The implicit padding before timespec is made explicit to avoid incompatible
structure layout between 32-bit and 64-bit x86 due to the different
alignment requirements, and the snd_pcm_status structure is now hidden
from the kernel to avoid relying on the timespec definitio definitionn

Finally we can replace SNDRV_PCM_IOCTL_STATUS and SNDRV_PCM_IOCTL_STATUS_EXT
with new commands and introduce new functions to fill new 'struct snd_pcm_status64'
instead of using unsafe 'struct snd_pcm_status'. Then in future, the new
commands can be matched when userspace changes 'timespec' to 64bit type
to make a size change of 'struct snd_pcm_status'. When glibc changes time_t
to 64-bit, any recompiled program will issue ioctl commands that the kernel
does not understand without this patch.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
include/sound/pcm.h | 56 ++++++++++++-
include/uapi/sound/asound.h | 6 ++
sound/core/pcm.c | 12 +--
sound/core/pcm_compat.c | 154 +++++++++++++-----------------------
sound/core/pcm_native.c | 96 ++++++++++++++++++----
5 files changed, 198 insertions(+), 126 deletions(-)

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index cb407fade933..5a31525e2df6 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -44,6 +44,7 @@ struct snd_pcm_hardware {
size_t fifo_size; /* fifo size in bytes */
};

+struct snd_pcm_status64;
struct snd_pcm_substream;

struct snd_pcm_audio_tstamp_config; /* definitions further down */
@@ -558,8 +559,8 @@ int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
int snd_pcm_info_user(struct snd_pcm_substream *substream,
struct snd_pcm_info __user *info);
-int snd_pcm_status(struct snd_pcm_substream *substream,
- struct snd_pcm_status *status);
+int snd_pcm_status64(struct snd_pcm_substream *substream,
+ struct snd_pcm_status64 *status);
int snd_pcm_start(struct snd_pcm_substream *substream);
int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status);
int snd_pcm_drain_done(struct snd_pcm_substream *substream);
@@ -1422,4 +1423,55 @@ static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format)
#define pcm_dbg(pcm, fmt, args...) \
dev_dbg((pcm)->card->dev, fmt, ##args)

+struct snd_pcm_status64 {
+ snd_pcm_state_t state; /* stream state */
+ u8 rsvd[4];
+ s64 trigger_tstamp_sec; /* time when stream was started/stopped/paused */
+ s64 trigger_tstamp_nsec;
+ s64 tstamp_sec; /* reference timestamp */
+ s64 tstamp_nsec;
+ snd_pcm_uframes_t appl_ptr; /* appl ptr */
+ snd_pcm_uframes_t hw_ptr; /* hw ptr */
+ snd_pcm_sframes_t delay; /* current delay in frames */
+ snd_pcm_uframes_t avail; /* number of frames available */
+ snd_pcm_uframes_t avail_max; /* max frames available on hw since last status */
+ snd_pcm_uframes_t overrange; /* count of ADC (capture) overrange detections from last status */
+ snd_pcm_state_t suspended_state; /* suspended stream state */
+ __u32 audio_tstamp_data; /* needed for 64-bit alignment, used for configs/report to/from userspace */
+ s64 audio_tstamp_sec; /* sample counter, wall clock, PHC or on-demand sync'ed */
+ s64 audio_tstamp_nsec;
+ s64 driver_tstamp_sec; /* useful in case reference system tstamp is reported with delay */
+ s64 driver_tstamp_nsec;
+ __u32 audio_tstamp_accuracy; /* in ns units, only valid if indicated in audio_tstamp_data */
+ unsigned char reserved[52-4*sizeof(s64)]; /* must be filled with zero */
+};
+
+#define SNDRV_PCM_IOCTL_STATUS64 _IOR('A', 0x20, struct snd_pcm_status64)
+#define SNDRV_PCM_IOCTL_STATUS_EXT64 _IOWR('A', 0x24, struct snd_pcm_status64)
+
+struct snd_pcm_status32 {
+ s32 state; /* stream state */
+ s32 trigger_tstamp_sec; /* time when stream was started/stopped/paused */
+ s32 trigger_tstamp_nsec;
+ s32 tstamp_sec; /* reference timestamp */
+ s32 tstamp_nsec;
+ u32 appl_ptr; /* appl ptr */
+ u32 hw_ptr; /* hw ptr */
+ s32 delay; /* current delay in frames */
+ u32 avail; /* number of frames available */
+ u32 avail_max; /* max frames available on hw since last status */
+ u32 overrange; /* count of ADC (capture) overrange detections from last status */
+ s32 suspended_state; /* suspended stream state */
+ u32 audio_tstamp_data; /* needed for 64-bit alignment, used for configs/report to/from userspace */
+ s32 audio_tstamp_sec; /* sample counter, wall clock, PHC or on-demand sync'ed */
+ s32 audio_tstamp_nsec;
+ s32 driver_tstamp_sec; /* useful in case reference system tstamp is reported with delay */
+ s32 driver_tstamp_nsec;
+ u32 audio_tstamp_accuracy; /* in ns units, only valid if indicated in audio_tstamp_data */
+ unsigned char reserved[52-4*sizeof(s32)]; /* must be filled with zero */
+};
+
+#define SNDRV_PCM_IOCTL_STATUS32 _IOR('A', 0x20, struct snd_pcm_status32)
+#define SNDRV_PCM_IOCTL_STATUS_EXT32 _IOWR('A', 0x24, struct snd_pcm_status32)
+
#endif /* __SOUND_PCM_H */
diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h
index 40a23d8418fe..d2c88c098b20 100644
--- a/include/uapi/sound/asound.h
+++ b/include/uapi/sound/asound.h
@@ -456,8 +456,13 @@ enum {
SNDRV_PCM_AUDIO_TSTAMP_TYPE_LAST = SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK_SYNCHRONIZED
};

+#ifndef __KERNEL__
+/* explicit padding avoids incompatibility between i386 and x86-64 */
+typedef struct { unsigned char pad[sizeof(time_t) - sizeof(int)] __time_pad;
+
struct snd_pcm_status {
snd_pcm_state_t state; /* stream state */
+ __time_pad pad1; /* align to timespec */
struct timespec trigger_tstamp; /* time when stream was started/stopped/paused */
struct timespec tstamp; /* reference timestamp */
snd_pcm_uframes_t appl_ptr; /* appl ptr */
@@ -473,6 +478,7 @@ struct snd_pcm_status {
__u32 audio_tstamp_accuracy; /* in ns units, only valid if indicated in audio_tstamp_data */
unsigned char reserved[52-2*sizeof(struct timespec)]; /* must be filled with zero */
};
+#endif

struct snd_pcm_mmap_status {
snd_pcm_state_t state; /* RO: state - SNDRV_PCM_STATE_XXXX */
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 9a72d641743d..85db55ea49fd 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -443,7 +443,7 @@ static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry,
{
struct snd_pcm_substream *substream = entry->private_data;
struct snd_pcm_runtime *runtime;
- struct snd_pcm_status status;
+ struct snd_pcm_status64 status;
int err;

mutex_lock(&substream->pcm->open_mutex);
@@ -453,17 +453,17 @@ static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry,
goto unlock;
}
memset(&status, 0, sizeof(status));
- err = snd_pcm_status(substream, &status);
+ err = snd_pcm_status64(substream, &status);
if (err < 0) {
snd_iprintf(buffer, "error %d\n", err);
goto unlock;
}
snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state));
snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid));
- snd_iprintf(buffer, "trigger_time: %ld.%09ld\n",
- status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec);
- snd_iprintf(buffer, "tstamp : %ld.%09ld\n",
- status.tstamp.tv_sec, status.tstamp.tv_nsec);
+ snd_iprintf(buffer, "trigger_time: %lld.%09lld\n",
+ status.trigger_tstamp_sec, status.trigger_tstamp_nsec);
+ snd_iprintf(buffer, "tstamp : %lld.%09lld\n",
+ status.tstamp_sec, status.tstamp_nsec);
snd_iprintf(buffer, "delay : %ld\n", status.delay);
snd_iprintf(buffer, "avail : %ld\n", status.avail);
snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max);
diff --git a/sound/core/pcm_compat.c b/sound/core/pcm_compat.c
index 6f9003b1869a..2671658442ea 100644
--- a/sound/core/pcm_compat.c
+++ b/sound/core/pcm_compat.c
@@ -168,73 +168,13 @@ static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
snd_pcm_channel_info_user(s, p)
#endif /* CONFIG_X86_X32 */

-struct snd_pcm_status32 {
+struct compat_snd_pcm_status64 {
s32 state;
- struct compat_timespec trigger_tstamp;
- struct compat_timespec tstamp;
- u32 appl_ptr;
- u32 hw_ptr;
- s32 delay;
- u32 avail;
- u32 avail_max;
- u32 overrange;
- s32 suspended_state;
- u32 audio_tstamp_data;
- struct compat_timespec audio_tstamp;
- struct compat_timespec driver_tstamp;
- u32 audio_tstamp_accuracy;
- unsigned char reserved[52-2*sizeof(struct compat_timespec)];
-} __attribute__((packed));
-
-
-static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
- struct snd_pcm_status32 __user *src,
- bool ext)
-{
- struct snd_pcm_status status;
- int err;
-
- memset(&status, 0, sizeof(status));
- /*
- * with extension, parameters are read/write,
- * get audio_tstamp_data from user,
- * ignore rest of status structure
- */
- if (ext && get_user(status.audio_tstamp_data,
- (u32 __user *)(&src->audio_tstamp_data)))
- return -EFAULT;
- err = snd_pcm_status(substream, &status);
- if (err < 0)
- return err;
-
- if (clear_user(src, sizeof(*src)))
- return -EFAULT;
- if (put_user(status.state, &src->state) ||
- compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
- compat_put_timespec(&status.tstamp, &src->tstamp) ||
- put_user(status.appl_ptr, &src->appl_ptr) ||
- put_user(status.hw_ptr, &src->hw_ptr) ||
- put_user(status.delay, &src->delay) ||
- put_user(status.avail, &src->avail) ||
- put_user(status.avail_max, &src->avail_max) ||
- put_user(status.overrange, &src->overrange) ||
- put_user(status.suspended_state, &src->suspended_state) ||
- put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
- compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
- compat_put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
- put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
- return -EFAULT;
-
- return err;
-}
-
-#ifdef CONFIG_X86_X32
-/* X32 ABI has 64bit timespec and 64bit alignment */
-struct snd_pcm_status_x32 {
- s32 state;
- u32 rsvd; /* alignment */
- struct timespec trigger_tstamp;
- struct timespec tstamp;
+ u8 rsvd[4]; /* alignment */
+ s64 trigger_tstamp_sec;
+ s64 trigger_tstamp_nsec;
+ s64 tstamp_sec;
+ s64 tstamp_nsec;
u32 appl_ptr;
u32 hw_ptr;
s32 delay;
@@ -243,22 +183,26 @@ struct snd_pcm_status_x32 {
u32 overrange;
s32 suspended_state;
u32 audio_tstamp_data;
- struct timespec audio_tstamp;
- struct timespec driver_tstamp;
+ s64 audio_tstamp_sec;
+ s64 audio_tstamp_nsec;
+ s64 driver_tstamp_sec;
+ s64 driver_tstamp_nsec;
u32 audio_tstamp_accuracy;
- unsigned char reserved[52-2*sizeof(struct timespec)];
+ unsigned char reserved[52-4*sizeof(s64)];
} __packed;

#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))

-static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream,
- struct snd_pcm_status_x32 __user *src,
- bool ext)
+static int snd_pcm_status_user_compat64(struct snd_pcm_substream *substream,
+ struct compat_snd_pcm_status64 __user *src,
+ bool ext)
{
- struct snd_pcm_status status;
+ struct snd_pcm_status64 status;
+ struct compat_snd_pcm_status64 compat_status64;
int err;

memset(&status, 0, sizeof(status));
+ memset(&compat_status64, 0, sizeof(compat_status64));
/*
* with extension, parameters are read/write,
* get audio_tstamp_data from user,
@@ -267,31 +211,39 @@ static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream,
if (ext && get_user(status.audio_tstamp_data,
(u32 __user *)(&src->audio_tstamp_data)))
return -EFAULT;
- err = snd_pcm_status(substream, &status);
+ err = snd_pcm_status64(substream, &status);
if (err < 0)
return err;

if (clear_user(src, sizeof(*src)))
return -EFAULT;
- if (put_user(status.state, &src->state) ||
- put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
- put_timespec(&status.tstamp, &src->tstamp) ||
- put_user(status.appl_ptr, &src->appl_ptr) ||
- put_user(status.hw_ptr, &src->hw_ptr) ||
- put_user(status.delay, &src->delay) ||
- put_user(status.avail, &src->avail) ||
- put_user(status.avail_max, &src->avail_max) ||
- put_user(status.overrange, &src->overrange) ||
- put_user(status.suspended_state, &src->suspended_state) ||
- put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
- put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
- put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
- put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
+
+ compat_status64 = (struct compat_snd_pcm_status64) {
+ .state = status.state,
+ .trigger_tstamp_sec = status.trigger_tstamp_sec,
+ .trigger_tstamp_nsec = status.trigger_tstamp_nsec,
+ .tstamp_sec = status.tstamp_sec,
+ .tstamp_nsec = status.tstamp_nsec,
+ .appl_ptr = status.appl_ptr,
+ .hw_ptr = status.hw_ptr,
+ .delay = status.delay,
+ .avail = status.avail,
+ .avail_max = status.avail_max,
+ .overrange = status.overrange,
+ .suspended_state = status.suspended_state,
+ .audio_tstamp_data = status.audio_tstamp_data,
+ .audio_tstamp_sec = status.audio_tstamp_sec,
+ .audio_tstamp_nsec = status.audio_tstamp_nsec,
+ .driver_tstamp_sec = status.audio_tstamp_sec,
+ .driver_tstamp_nsec = status.audio_tstamp_nsec,
+ .audio_tstamp_accuracy = status.audio_tstamp_accuracy,
+ };
+
+ if (copy_to_user(src, &compat_status64, sizeof(compat_status64)))
return -EFAULT;

return err;
}
-#endif /* CONFIG_X86_X32 */

/* both for HW_PARAMS and HW_REFINE */
static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
@@ -616,8 +568,8 @@ enum {
SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
- SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
- SNDRV_PCM_IOCTL_STATUS_EXT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
+ SNDRV_PCM_IOCTL_STATUS_COMPAT32 = _IOR('A', 0x20, struct snd_pcm_status32),
+ SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
@@ -627,10 +579,10 @@ enum {
SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
+ SNDRV_PCM_IOCTL_STATUS_COMPAT64 = _IOR('A', 0x20, struct compat_snd_pcm_status64),
+ SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64 = _IOWR('A', 0x24, struct compat_snd_pcm_status64),
#ifdef CONFIG_X86_X32
SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
- SNDRV_PCM_IOCTL_STATUS_X32 = _IOR('A', 0x20, struct snd_pcm_status_x32),
- SNDRV_PCM_IOCTL_STATUS_EXT_X32 = _IOWR('A', 0x24, struct snd_pcm_status_x32),
SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
#endif /* CONFIG_X86_X32 */
};
@@ -680,10 +632,10 @@ static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned l
return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
case SNDRV_PCM_IOCTL_SW_PARAMS32:
return snd_pcm_ioctl_sw_params_compat(substream, argp);
- case SNDRV_PCM_IOCTL_STATUS32:
- return snd_pcm_status_user_compat(substream, argp, false);
- case SNDRV_PCM_IOCTL_STATUS_EXT32:
- return snd_pcm_status_user_compat(substream, argp, true);
+ case SNDRV_PCM_IOCTL_STATUS_COMPAT32:
+ return snd_pcm_status_user32(substream, argp, false);
+ case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32:
+ return snd_pcm_status_user32(substream, argp, true);
case SNDRV_PCM_IOCTL_SYNC_PTR32:
return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
@@ -702,11 +654,11 @@ static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned l
return snd_pcm_ioctl_rewind_compat(substream, argp);
case SNDRV_PCM_IOCTL_FORWARD32:
return snd_pcm_ioctl_forward_compat(substream, argp);
+ case SNDRV_PCM_IOCTL_STATUS_COMPAT64:
+ return snd_pcm_status_user_compat64(substream, argp, false);
+ case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64:
+ return snd_pcm_status_user_compat64(substream, argp, true);
#ifdef CONFIG_X86_X32
- case SNDRV_PCM_IOCTL_STATUS_X32:
- return snd_pcm_status_user_x32(substream, argp, false);
- case SNDRV_PCM_IOCTL_STATUS_EXT_X32:
- return snd_pcm_status_user_x32(substream, argp, true);
case SNDRV_PCM_IOCTL_SYNC_PTR_X32:
return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 67fe14bad7cb..ad4cf1e3e3bd 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -891,8 +891,8 @@ snd_pcm_calc_delay(struct snd_pcm_substream *substream)
return delay + substream->runtime->delay;
}

-int snd_pcm_status(struct snd_pcm_substream *substream,
- struct snd_pcm_status *status)
+int snd_pcm_status64(struct snd_pcm_substream *substream,
+ struct snd_pcm_status64 *status)
{
struct snd_pcm_runtime *runtime = substream->runtime;

@@ -918,14 +918,22 @@ int snd_pcm_status(struct snd_pcm_substream *substream,
status->suspended_state = runtime->status->suspended_state;
if (status->state == SNDRV_PCM_STATE_OPEN)
goto _end;
- status->trigger_tstamp = timespec64_to_timespec(runtime->trigger_tstamp);
+ status->trigger_tstamp_sec = runtime->trigger_tstamp.tv_sec;
+ status->trigger_tstamp_nsec = runtime->trigger_tstamp.tv_nsec;
if (snd_pcm_running(substream)) {
snd_pcm_update_hw_ptr(substream);
if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
- status->tstamp = runtime->status->tstamp;
- status->driver_tstamp = timespec64_to_timespec(runtime->driver_tstamp);
- status->audio_tstamp =
- runtime->status->audio_tstamp;
+ status->tstamp_sec = runtime->status->tstamp.tv_sec;
+ status->tstamp_nsec =
+ runtime->status->tstamp.tv_nsec;
+ status->driver_tstamp_sec =
+ runtime->driver_tstamp.tv_sec;
+ status->driver_tstamp_nsec =
+ runtime->driver_tstamp.tv_nsec;
+ status->audio_tstamp_sec =
+ runtime->status->audio_tstamp.tv_sec;
+ status->audio_tstamp_nsec =
+ runtime->status->audio_tstamp.tv_nsec;
if (runtime->audio_tstamp_report.valid == 1)
/* backwards compatibility, no report provided in COMPAT mode */
snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
@@ -940,7 +948,8 @@ int snd_pcm_status(struct snd_pcm_substream *substream,
struct timespec64 tstamp;

snd_pcm_gettime(runtime, &tstamp);
- status->tstamp = timespec64_to_timespec(tstamp);
+ status->tstamp_sec = tstamp.tv_sec;
+ status->tstamp_nsec = tstamp.tv_nsec;
}
}
_tstamp_end:
@@ -958,11 +967,11 @@ int snd_pcm_status(struct snd_pcm_substream *substream,
return 0;
}

-static int snd_pcm_status_user(struct snd_pcm_substream *substream,
- struct snd_pcm_status __user * _status,
- bool ext)
+static int snd_pcm_status_user64(struct snd_pcm_substream *substream,
+ struct snd_pcm_status64 __user * _status,
+ bool ext)
{
- struct snd_pcm_status status;
+ struct snd_pcm_status64 status;
int res;

memset(&status, 0, sizeof(status));
@@ -974,7 +983,7 @@ static int snd_pcm_status_user(struct snd_pcm_substream *substream,
if (ext && get_user(status.audio_tstamp_data,
(u32 __user *)(&_status->audio_tstamp_data)))
return -EFAULT;
- res = snd_pcm_status(substream, &status);
+ res = snd_pcm_status64(substream, &status);
if (res < 0)
return res;
if (copy_to_user(_status, &status, sizeof(status)))
@@ -982,6 +991,55 @@ static int snd_pcm_status_user(struct snd_pcm_substream *substream,
return 0;
}

+static int snd_pcm_status_user32(struct snd_pcm_substream *substream,
+ struct snd_pcm_status32 __user * _status,
+ bool ext)
+{
+ struct snd_pcm_status64 status64;
+ struct snd_pcm_status32 status32;
+ int res;
+
+ memset(&status64, 0, sizeof(status64));
+ memset(&status32, 0, sizeof(status32));
+ /*
+ * with extension, parameters are read/write,
+ * get audio_tstamp_data from user,
+ * ignore rest of status structure
+ */
+ if (ext && get_user(status64.audio_tstamp_data,
+ (u32 __user *)(&_status->audio_tstamp_data)))
+ return -EFAULT;
+ res = snd_pcm_status64(substream, &status64);
+ if (res < 0)
+ return res;
+
+ status32 = (struct snd_pcm_status32) {
+ .state = status64.state,
+ .trigger_tstamp_sec = status64.trigger_tstamp_sec,
+ .trigger_tstamp_nsec = status64.trigger_tstamp_nsec,
+ .tstamp_sec = status64.tstamp_sec,
+ .tstamp_nsec = status64.tstamp_nsec,
+ .appl_ptr = status64.appl_ptr,
+ .hw_ptr = status64.hw_ptr,
+ .delay = status64.delay,
+ .avail = status64.avail,
+ .avail_max = status64.avail_max,
+ .overrange = status64.overrange,
+ .suspended_state = status64.suspended_state,
+ .audio_tstamp_data = status64.audio_tstamp_data,
+ .audio_tstamp_sec = status64.audio_tstamp_sec,
+ .audio_tstamp_nsec = status64.audio_tstamp_nsec,
+ .driver_tstamp_sec = status64.audio_tstamp_sec,
+ .driver_tstamp_nsec = status64.audio_tstamp_nsec,
+ .audio_tstamp_accuracy = status64.audio_tstamp_accuracy,
+ };
+
+ if (copy_to_user(_status, &status32, sizeof(status32)))
+ return -EFAULT;
+
+ return 0;
+}
+
static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
struct snd_pcm_channel_info * info)
{
@@ -2959,10 +3017,14 @@ static int snd_pcm_common_ioctl(struct file *file,
return snd_pcm_hw_free(substream);
case SNDRV_PCM_IOCTL_SW_PARAMS:
return snd_pcm_sw_params_user(substream, arg);
- case SNDRV_PCM_IOCTL_STATUS:
- return snd_pcm_status_user(substream, arg, false);
- case SNDRV_PCM_IOCTL_STATUS_EXT:
- return snd_pcm_status_user(substream, arg, true);
+ case SNDRV_PCM_IOCTL_STATUS32:
+ return snd_pcm_status_user32(substream, arg, false);
+ case SNDRV_PCM_IOCTL_STATUS_EXT32:
+ return snd_pcm_status_user32(substream, arg, true);
+ case SNDRV_PCM_IOCTL_STATUS64:
+ return snd_pcm_status_user64(substream, arg, false);
+ case SNDRV_PCM_IOCTL_STATUS_EXT64:
+ return snd_pcm_status_user64(substream, arg, true);
case SNDRV_PCM_IOCTL_CHANNEL_INFO:
return snd_pcm_channel_info_user(substream, arg);
case SNDRV_PCM_IOCTL_PREPARE:
--
2.20.0
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