Displaying 20 results from an estimated 25 matches for "current_quality".
2014 Dec 08
0
[PATCH v5 REPOST 1/6] hw_random: place mutex around read functions and buffers.
...static LIST_HEAD(rng_list);
+/* Protects rng_list and current_rng */
static DEFINE_MUTEX(rng_mutex);
+/* Protects rng read functions, data_avail, rng_buffer and rng_fillbuf */
+static DEFINE_MUTEX(reading_mutex);
static int data_avail;
static u8 *rng_buffer, *rng_fillbuf;
static unsigned short current_quality;
@@ -81,7 +84,9 @@ static void add_early_randomness(struct hwrng *rng)
unsigned char bytes[16];
int bytes_read;
+ mutex_lock(&reading_mutex);
bytes_read = rng_get_data(rng, bytes, sizeof(bytes), 1);
+ mutex_unlock(&reading_mutex);
if (bytes_read > 0)
add_device_randomness(by...
2014 Oct 21
1
[PATCH 3/5] hw_random: fix unregister race.
...random/core.c
> +++ b/drivers/char/hw_random/core.c
> @@ -60,6 +60,7 @@ static DEFINE_MUTEX(rng_mutex);
> static DEFINE_MUTEX(reading_mutex);
> static int data_avail;
> static u8 *rng_buffer, *rng_fillbuf;
> +static DECLARE_WAIT_QUEUE_HEAD(rng_done);
> static unsigned short current_quality;
> static unsigned short default_quality; /* = 0; default to "off" */
>
> @@ -98,6 +99,7 @@ static inline void cleanup_rng(struct kref *kref)
>
> if (rng->cleanup)
> rng->cleanup(rng);
> + wake_up_all(&rng_done);
> }
>
> static void se...
2014 Oct 21
1
[PATCH 3/5] hw_random: fix unregister race.
...random/core.c
> +++ b/drivers/char/hw_random/core.c
> @@ -60,6 +60,7 @@ static DEFINE_MUTEX(rng_mutex);
> static DEFINE_MUTEX(reading_mutex);
> static int data_avail;
> static u8 *rng_buffer, *rng_fillbuf;
> +static DECLARE_WAIT_QUEUE_HEAD(rng_done);
> static unsigned short current_quality;
> static unsigned short default_quality; /* = 0; default to "off" */
>
> @@ -98,6 +99,7 @@ static inline void cleanup_rng(struct kref *kref)
>
> if (rng->cleanup)
> rng->cleanup(rng);
> + wake_up_all(&rng_done);
> }
>
> static void se...
2014 Sep 18
2
[PATCH v2 3/6] hw_random: use reference counts on each struct hwrng.
...);
> - current_rng = rng;
> + drop_current_rng();
> + set_current_rng(rng);
We got a warning in boot stage when above set_current_rng() is executed,
it can be fixed by init rng->ref in hwrng_init().
@@ -166,6 +169,8 @@ static inline int hwrng_init(struct hwrng *rng)
if (current_quality > 0 && !hwrng_fill)
start_khwrngd();
+ kref_init(&rng->ref);
+
return 0;
}
[ 2.754303] ------------[ cut here ]------------
[ 2.756018] WARNING: at include/linux/kref.h:47 kref_get.part.2+0x1e/0x27()
[ 2.758150] Modules linked in: virtio...
2014 Sep 18
2
[PATCH v2 3/6] hw_random: use reference counts on each struct hwrng.
...);
> - current_rng = rng;
> + drop_current_rng();
> + set_current_rng(rng);
We got a warning in boot stage when above set_current_rng() is executed,
it can be fixed by init rng->ref in hwrng_init().
@@ -166,6 +169,8 @@ static inline int hwrng_init(struct hwrng *rng)
if (current_quality > 0 && !hwrng_fill)
start_khwrngd();
+ kref_init(&rng->ref);
+
return 0;
}
[ 2.754303] ------------[ cut here ]------------
[ 2.756018] WARNING: at include/linux/kref.h:47 kref_get.part.2+0x1e/0x27()
[ 2.758150] Modules linked in: virtio...
2014 Sep 18
2
[PATCH 1/5] hw_random: place mutex around read functions and buffers.
...static LIST_HEAD(rng_list);
+/* Protects rng_list and current_rng */
static DEFINE_MUTEX(rng_mutex);
+/* Protects rng read functions, data_avail, rng_buffer and rng_fillbuf */
+static DEFINE_MUTEX(reading_mutex);
static int data_avail;
static u8 *rng_buffer, *rng_fillbuf;
static unsigned short current_quality;
@@ -81,7 +84,9 @@ static void add_early_randomness(struct hwrng *rng)
unsigned char bytes[16];
int bytes_read;
+ mutex_lock(&reading_mutex);
bytes_read = rng_get_data(rng, bytes, sizeof(bytes), 1);
+ mutex_unlock(&reading_mutex);
if (bytes_read > 0)
add_device_randomness(by...
2014 Nov 03
9
[PATCH v4 0/6] fix hw_random stuck
When I hotunplug a busy virtio-rng device or try to access
hwrng attributes in non-smp guest, it gets stuck.
My hotplug tests:
| test 0:
| hotunplug rng device from qemu monitor
|
| test 1:
| guest) # dd if=/dev/hwrng of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test 2:
| guest) # dd if=/dev/random of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test
2014 Nov 03
9
[PATCH v4 0/6] fix hw_random stuck
When I hotunplug a busy virtio-rng device or try to access
hwrng attributes in non-smp guest, it gets stuck.
My hotplug tests:
| test 0:
| hotunplug rng device from qemu monitor
|
| test 1:
| guest) # dd if=/dev/hwrng of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test 2:
| guest) # dd if=/dev/random of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test
2014 Oct 20
0
[PATCH v2 3/6] hw_random: use reference counts on each struct hwrng.
Amos Kong <akong at redhat.com> writes:
> We got a warning in boot stage when above set_current_rng() is executed,
> it can be fixed by init rng->ref in hwrng_init().
>
>
> @@ -166,6 +169,8 @@ static inline int hwrng_init(struct hwrng *rng)
> if (current_quality > 0 && !hwrng_fill)
> start_khwrngd();
>
> + kref_init(&rng->ref);
> +
> return 0;
> }
OK, I folded this fix on.
Thanks,
Rusty.
hw_random: use reference counts on each struct hwrng.
current_rng holds one reference, and we bump...
2014 Oct 20
0
[PATCH v2 3/6] hw_random: use reference counts on each struct hwrng.
Amos Kong <akong at redhat.com> writes:
> We got a warning in boot stage when above set_current_rng() is executed,
> it can be fixed by init rng->ref in hwrng_init().
>
>
> @@ -166,6 +169,8 @@ static inline int hwrng_init(struct hwrng *rng)
> if (current_quality > 0 && !hwrng_fill)
> start_khwrngd();
>
> + kref_init(&rng->ref);
> +
> return 0;
> }
OK, I folded this fix on.
Thanks,
Rusty.
hw_random: use reference counts on each struct hwrng.
current_rng holds one reference, and we bump...
2014 Dec 06
7
[PATCH v5 0/6] fix hw_random stuck
When I hotunplug a busy virtio-rng device or try to access
hwrng attributes in non-smp guest, it gets stuck.
My hotplug tests:
| test 0:
| hotunplug rng device from qemu monitor
|
| test 1:
| guest) # dd if=/dev/hwrng of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test 2:
| guest) # dd if=/dev/random of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test
2014 Dec 06
7
[PATCH v5 0/6] fix hw_random stuck
When I hotunplug a busy virtio-rng device or try to access
hwrng attributes in non-smp guest, it gets stuck.
My hotplug tests:
| test 0:
| hotunplug rng device from qemu monitor
|
| test 1:
| guest) # dd if=/dev/hwrng of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test 2:
| guest) # dd if=/dev/random of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test
2014 Sep 18
9
[PATCH v2 0/6] fix hw_random stuck
When I hotunplug a busy virtio-rng device or try to access
hwrng attributes in non-smp guest, it gets stuck.
My original was pain, Rusty posted a real fix. This patchset
fixed two issue in v1, and tested by my 6+ cases.
| test 0:
| hotunplug rng device from qemu monitor
|
| test 1:
| guest) # dd if=/dev/hwrng of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test 2:
|
2014 Sep 18
9
[PATCH v2 0/6] fix hw_random stuck
When I hotunplug a busy virtio-rng device or try to access
hwrng attributes in non-smp guest, it gets stuck.
My original was pain, Rusty posted a real fix. This patchset
fixed two issue in v1, and tested by my 6+ cases.
| test 0:
| hotunplug rng device from qemu monitor
|
| test 1:
| guest) # dd if=/dev/hwrng of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test 2:
|
2014 Sep 18
6
[PATCH v2 2/3] hw_random: fix stuck in catting hwrng attributes
Amos Kong <akong at redhat.com> writes:
> I started a QEMU (non-smp) guest with one virtio-rng device, and read
> random data from /dev/hwrng by dd:
>
> # dd if=/dev/hwrng of=/dev/null &
>
> In the same time, if I check hwrng attributes from sysfs by cat:
>
> # cat /sys/class/misc/hw_random/rng_*
>
> The cat process always gets stuck with slow backend (5
2014 Sep 18
6
[PATCH v2 2/3] hw_random: fix stuck in catting hwrng attributes
Amos Kong <akong at redhat.com> writes:
> I started a QEMU (non-smp) guest with one virtio-rng device, and read
> random data from /dev/hwrng by dd:
>
> # dd if=/dev/hwrng of=/dev/null &
>
> In the same time, if I check hwrng attributes from sysfs by cat:
>
> # cat /sys/class/misc/hw_random/rng_*
>
> The cat process always gets stuck with slow backend (5
2014 Dec 08
8
[PATCH v5 REPOST 0/6] fix hw_random stuck
When I hotunplug a busy virtio-rng device or try to access
hwrng attributes in non-smp guest, it gets stuck.
My hotplug tests:
| test 0:
| hotunplug rng device from qemu monitor
|
| test 1:
| guest) # dd if=/dev/hwrng of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test 2:
| guest) # dd if=/dev/random of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test
2014 Dec 08
8
[PATCH v5 REPOST 0/6] fix hw_random stuck
When I hotunplug a busy virtio-rng device or try to access
hwrng attributes in non-smp guest, it gets stuck.
My hotplug tests:
| test 0:
| hotunplug rng device from qemu monitor
|
| test 1:
| guest) # dd if=/dev/hwrng of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test 2:
| guest) # dd if=/dev/random of=/dev/null &
| hotunplug rng device from qemu monitor
|
| test
2014 Sep 18
0
[PATCH 3/5] hw_random: fix unregister race.
...521cf 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -60,6 +60,7 @@ static DEFINE_MUTEX(rng_mutex);
static DEFINE_MUTEX(reading_mutex);
static int data_avail;
static u8 *rng_buffer, *rng_fillbuf;
+static DECLARE_WAIT_QUEUE_HEAD(rng_done);
static unsigned short current_quality;
static unsigned short default_quality; /* = 0; default to "off" */
@@ -98,6 +99,7 @@ static inline void cleanup_rng(struct kref *kref)
if (rng->cleanup)
rng->cleanup(rng);
+ wake_up_all(&rng_done);
}
static void set_current_rng(struct hwrng *rng)
@@ -529,6 +531,9...
2014 Sep 18
0
[PATCH v2 4/6] hw_random: fix unregister race.
...6f5bb 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -60,6 +60,7 @@ static DEFINE_MUTEX(rng_mutex);
static DEFINE_MUTEX(reading_mutex);
static int data_avail;
static u8 *rng_buffer, *rng_fillbuf;
+static DECLARE_WAIT_QUEUE_HEAD(rng_done);
static unsigned short current_quality;
static unsigned short default_quality; /* = 0; default to "off" */
@@ -98,6 +99,7 @@ static inline void cleanup_rng(struct kref *kref)
if (rng->cleanup)
rng->cleanup(rng);
+ wake_up_all(&rng_done);
}
static void set_current_rng(struct hwrng *rng)
--
1.9.3