From: Arnd Bergmann <arnd@arndb.de>
To: alsa-devel@alsa-project.org, Takashi Iwai <tiwai@suse.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
Baolin Wang <baolin.wang@linaro.org>,
y2038@lists.linaro.org, linux-kernel@vger.kernel.org,
Mark Brown <broonie@kernel.org>,
Baolin Wang <baolin.wang7@gmail.com>
Subject: [alsa-devel] [PATCH v6 2/8] ALSA: Avoid using timespec for struct snd_timer_status
Date: Tue, 12 Nov 2019 16:16:36 +0100 [thread overview]
Message-ID: <20191112151642.680072-3-arnd@arndb.de> (raw)
In-Reply-To: <20191112151642.680072-1-arnd@arndb.de>
From: Baolin Wang <baolin.wang@linaro.org>
struct snd_timer_status uses 'timespec' type variables to record
timestamp, which will be changed to an incompatible layout with
updated user space using 64-bit time_t.
To handle both the old and the new layout on 32-bit architectures,
this patch introduces 'struct snd_timer_status32' and 'struct snd_timer_status64'
to handle 32bit time_t and 64bit time_t in native mode and compat mode,
which replaces timespec with s64 type.
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/uapi/sound/asound.h | 2 ++
sound/core/timer.c | 62 +++++++++++++++++++++++++++++++++----
sound/core/timer_compat.c | 57 ++++------------------------------
3 files changed, 64 insertions(+), 57 deletions(-)
diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h
index df1153cea0b7..930854f67fd3 100644
--- a/include/uapi/sound/asound.h
+++ b/include/uapi/sound/asound.h
@@ -761,6 +761,7 @@ struct snd_timer_params {
unsigned char reserved[60]; /* reserved */
};
+#ifndef __KERNEL__
struct snd_timer_status {
struct timespec tstamp; /* Timestamp - last update */
unsigned int resolution; /* current period resolution in ns */
@@ -769,6 +770,7 @@ struct snd_timer_status {
unsigned int queue; /* used queue size */
unsigned char reserved[64]; /* reserved */
};
+#endif
#define SNDRV_TIMER_IOCTL_PVERSION _IOR('T', 0x00, int)
#define SNDRV_TIMER_IOCTL_NEXT_DEVICE _IOWR('T', 0x01, struct snd_timer_id)
diff --git a/sound/core/timer.c b/sound/core/timer.c
index 29b99cfb5215..921f4ae2f9bf 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -65,6 +65,30 @@ struct snd_timer_user {
struct mutex ioctl_lock;
};
+struct snd_timer_status32 {
+ s32 tstamp_sec; /* Timestamp - last update */
+ s32 tstamp_nsec;
+ unsigned int resolution; /* current period resolution in ns */
+ unsigned int lost; /* counter of master tick lost */
+ unsigned int overrun; /* count of read queue overruns */
+ unsigned int queue; /* used queue size */
+ unsigned char reserved[64]; /* reserved */
+};
+
+#define SNDRV_TIMER_IOCTL_STATUS32 _IOR('T', 0x14, struct snd_timer_status32)
+
+struct snd_timer_status64 {
+ s64 tstamp_sec; /* Timestamp - last update */
+ s64 tstamp_nsec;
+ unsigned int resolution; /* current period resolution in ns */
+ unsigned int lost; /* counter of master tick lost */
+ unsigned int overrun; /* count of read queue overruns */
+ unsigned int queue; /* used queue size */
+ unsigned char reserved[64]; /* reserved */
+};
+
+#define SNDRV_TIMER_IOCTL_STATUS64 _IOR('T', 0x14, struct snd_timer_status64)
+
/* list of timers */
static LIST_HEAD(snd_timer_list);
@@ -1861,17 +1885,41 @@ static int snd_timer_user_params(struct file *file,
return err;
}
-static int snd_timer_user_status(struct file *file,
- struct snd_timer_status __user *_status)
+static int snd_timer_user_status32(struct file *file,
+ struct snd_timer_status32 __user *_status)
+ {
+ struct snd_timer_user *tu;
+ struct snd_timer_status32 status;
+
+ tu = file->private_data;
+ if (!tu->timeri)
+ return -EBADFD;
+ memset(&status, 0, sizeof(status));
+ status.tstamp_sec = tu->tstamp.tv_sec;
+ status.tstamp_nsec = tu->tstamp.tv_nsec;
+ status.resolution = snd_timer_resolution(tu->timeri);
+ status.lost = tu->timeri->lost;
+ status.overrun = tu->overrun;
+ spin_lock_irq(&tu->qlock);
+ status.queue = tu->qused;
+ spin_unlock_irq(&tu->qlock);
+ if (copy_to_user(_status, &status, sizeof(status)))
+ return -EFAULT;
+ return 0;
+}
+
+static int snd_timer_user_status64(struct file *file,
+ struct snd_timer_status64 __user *_status)
{
struct snd_timer_user *tu;
- struct snd_timer_status status;
+ struct snd_timer_status64 status;
tu = file->private_data;
if (!tu->timeri)
return -EBADFD;
memset(&status, 0, sizeof(status));
- status.tstamp = timespec64_to_timespec(tu->tstamp);
+ status.tstamp_sec = tu->tstamp.tv_sec;
+ status.tstamp_nsec = tu->tstamp.tv_nsec;
status.resolution = snd_timer_resolution(tu->timeri);
status.lost = tu->timeri->lost;
status.overrun = tu->overrun;
@@ -1995,8 +2043,10 @@ static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd,
return snd_timer_user_info(file, argp);
case SNDRV_TIMER_IOCTL_PARAMS:
return snd_timer_user_params(file, argp);
- case SNDRV_TIMER_IOCTL_STATUS:
- return snd_timer_user_status(file, argp);
+ case SNDRV_TIMER_IOCTL_STATUS32:
+ return snd_timer_user_status32(file, argp);
+ case SNDRV_TIMER_IOCTL_STATUS64:
+ return snd_timer_user_status64(file, argp);
case SNDRV_TIMER_IOCTL_START:
case SNDRV_TIMER_IOCTL_START_OLD:
return snd_timer_user_start(file);
diff --git a/sound/core/timer_compat.c b/sound/core/timer_compat.c
index bb6be484dfd3..20eef5bc304b 100644
--- a/sound/core/timer_compat.c
+++ b/sound/core/timer_compat.c
@@ -69,54 +69,11 @@ static int snd_timer_user_info_compat(struct file *file,
return 0;
}
-struct snd_timer_status32 {
- struct compat_timespec tstamp;
- u32 resolution;
- u32 lost;
- u32 overrun;
- u32 queue;
- unsigned char reserved[64];
-};
-
-static int snd_timer_user_status_compat(struct file *file,
- struct snd_timer_status32 __user *_status)
-{
- struct snd_timer_user *tu;
- struct snd_timer_status32 status;
-
- tu = file->private_data;
- if (!tu->timeri)
- return -EBADFD;
- memset(&status, 0, sizeof(status));
- status.tstamp.tv_sec = tu->tstamp.tv_sec;
- status.tstamp.tv_nsec = tu->tstamp.tv_nsec;
- status.resolution = snd_timer_resolution(tu->timeri);
- status.lost = tu->timeri->lost;
- status.overrun = tu->overrun;
- spin_lock_irq(&tu->qlock);
- status.queue = tu->qused;
- spin_unlock_irq(&tu->qlock);
- if (copy_to_user(_status, &status, sizeof(status)))
- return -EFAULT;
- return 0;
-}
-
-#ifdef CONFIG_X86_X32
-/* X32 ABI has the same struct as x86-64 */
-#define snd_timer_user_status_x32(file, s) \
- snd_timer_user_status(file, s)
-#endif /* CONFIG_X86_X32 */
-
-/*
- */
-
enum {
SNDRV_TIMER_IOCTL_GPARAMS32 = _IOW('T', 0x04, struct snd_timer_gparams32),
SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
- SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
-#ifdef CONFIG_X86_X32
- SNDRV_TIMER_IOCTL_STATUS_X32 = _IOW('T', 0x14, struct snd_timer_status),
-#endif /* CONFIG_X86_X32 */
+ SNDRV_TIMER_IOCTL_STATUS_COMPAT32 = _IOW('T', 0x14, struct snd_timer_status32),
+ SNDRV_TIMER_IOCTL_STATUS_COMPAT64 = _IOW('T', 0x14, struct snd_timer_status64),
};
static long __snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
@@ -145,12 +102,10 @@ static long __snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
return snd_timer_user_gparams_compat(file, argp);
case SNDRV_TIMER_IOCTL_INFO32:
return snd_timer_user_info_compat(file, argp);
- case SNDRV_TIMER_IOCTL_STATUS32:
- return snd_timer_user_status_compat(file, argp);
-#ifdef CONFIG_X86_X32
- case SNDRV_TIMER_IOCTL_STATUS_X32:
- return snd_timer_user_status_x32(file, argp);
-#endif /* CONFIG_X86_X32 */
+ case SNDRV_TIMER_IOCTL_STATUS_COMPAT32:
+ return snd_timer_user_status32(file, argp);
+ case SNDRV_TIMER_IOCTL_STATUS_COMPAT64:
+ return snd_timer_user_status64(file, argp);
}
return -ENOIOCTLCMD;
}
--
2.20.0
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next prev parent reply other threads:[~2019-11-12 15:21 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-12 15:16 [alsa-devel] [PATCH v6 0/8] Fix year 2038 issue for sound subsystem Arnd Bergmann
2019-11-12 15:16 ` [alsa-devel] [PATCH v6 1/8] ALSA: Replace timespec with timespec64 Arnd Bergmann
2019-11-12 15:16 ` Arnd Bergmann [this message]
2019-11-12 15:42 ` [alsa-devel] [PATCH v6 2/8] ALSA: Avoid using timespec for struct snd_timer_status Takashi Iwai
2019-11-12 20:08 ` Arnd Bergmann
2019-11-12 20:28 ` Takashi Iwai
2019-11-13 15:09 ` Arnd Bergmann
2019-11-12 15:16 ` [alsa-devel] [PATCH v6 3/8] ALSA: Avoid using timespec for struct snd_ctl_elem_value Arnd Bergmann
2019-11-12 15:16 ` [alsa-devel] [PATCH v6 4/8] ALSA: Avoid using timespec for struct snd_pcm_status Arnd Bergmann
2019-11-12 15:16 ` [alsa-devel] [PATCH v6 5/8] ALSA: Avoid using timespec for struct snd_rawmidi_status Arnd Bergmann
2019-11-12 16:38 ` Takashi Iwai
2019-11-12 20:04 ` Arnd Bergmann
2019-11-12 20:26 ` Takashi Iwai
2019-11-13 15:16 ` Arnd Bergmann
2019-11-12 15:16 ` [alsa-devel] [PATCH v6 6/8] ALSA: Avoid using timespec for struct snd_timer_tread Arnd Bergmann
2019-11-12 15:16 ` [alsa-devel] [PATCH v6 7/8] ALSA: move snd_pcm_ioctl_sync_ptr_compat into pcm_native.c Arnd Bergmann
2019-11-12 15:16 ` [alsa-devel] [PATCH v6 8/8] ALSA: add new 32-bit layout for snd_pcm_mmap_status/control Arnd Bergmann
2019-11-15 15:24 ` Arnd Bergmann
2019-11-12 20:37 ` [alsa-devel] [PATCH v6 0/8] Fix year 2038 issue for sound subsystem Takashi Iwai
2019-11-13 14:32 ` Arnd Bergmann
2019-11-13 16:40 ` Takashi Iwai
2019-11-13 16:51 ` Arnd Bergmann
2019-11-13 17:04 ` Takashi Iwai
2019-11-13 17:19 ` Arnd Bergmann
2019-11-13 18:13 ` Takashi Iwai
2019-11-13 20:48 ` Arnd Bergmann
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