* [PATCH 1/6] sandbox: include header to provide missing prototype
2019-08-27 14:32 [PATCH 0/6] sandbox: add HWRNG driver for host /dev/random Ahmad Fatoum
@ 2019-08-27 14:32 ` Ahmad Fatoum
2019-08-27 14:32 ` [PATCH 2/6] sandbox: remove unused ARCH_LINUX Kconfig symbol Ahmad Fatoum
` (4 subsequent siblings)
5 siblings, 0 replies; 9+ messages in thread
From: Ahmad Fatoum @ 2019-08-27 14:32 UTC (permalink / raw)
To: barebox
sandbox_add_device lacks a prototype. Include the appropriate header to
fix this.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
---
arch/sandbox/board/devices.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/sandbox/board/devices.c b/arch/sandbox/board/devices.c
index 242a0d718e91..72e62552a3b8 100644
--- a/arch/sandbox/board/devices.c
+++ b/arch/sandbox/board/devices.c
@@ -8,6 +8,7 @@
#include <driver.h>
#include <mach/linux.h>
#include <init.h>
+#include <mach/linux.h>
static LIST_HEAD(sandbox_device_list);
--
2.20.1
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^ permalink raw reply [flat|nested] 9+ messages in thread* [PATCH 2/6] sandbox: remove unused ARCH_LINUX Kconfig symbol
2019-08-27 14:32 [PATCH 0/6] sandbox: add HWRNG driver for host /dev/random Ahmad Fatoum
2019-08-27 14:32 ` [PATCH 1/6] sandbox: include header to provide missing prototype Ahmad Fatoum
@ 2019-08-27 14:32 ` Ahmad Fatoum
2019-08-27 14:32 ` [PATCH 3/6] sandbox: redefine optarg and optind to avoid collisions Ahmad Fatoum
` (3 subsequent siblings)
5 siblings, 0 replies; 9+ messages in thread
From: Ahmad Fatoum @ 2019-08-27 14:32 UTC (permalink / raw)
To: barebox
It's not referenced anywhere anymore, so drop it.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
---
arch/sandbox/Kconfig | 3 ---
1 file changed, 3 deletions(-)
diff --git a/arch/sandbox/Kconfig b/arch/sandbox/Kconfig
index 5227cb624f2b..d153846efa0f 100644
--- a/arch/sandbox/Kconfig
+++ b/arch/sandbox/Kconfig
@@ -12,6 +12,3 @@ config LINUX
bool
default y
select GENERIC_FIND_NEXT_BIT
-
-config ARCH_LINUX
- bool
--
2.20.1
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^ permalink raw reply [flat|nested] 9+ messages in thread* [PATCH 3/6] sandbox: redefine optarg and optind to avoid collisions
2019-08-27 14:32 [PATCH 0/6] sandbox: add HWRNG driver for host /dev/random Ahmad Fatoum
2019-08-27 14:32 ` [PATCH 1/6] sandbox: include header to provide missing prototype Ahmad Fatoum
2019-08-27 14:32 ` [PATCH 2/6] sandbox: remove unused ARCH_LINUX Kconfig symbol Ahmad Fatoum
@ 2019-08-27 14:32 ` Ahmad Fatoum
2019-08-27 14:32 ` [PATCH 4/6] sandbox: compile with symbol -fvisibility=hidden Ahmad Fatoum
` (2 subsequent siblings)
5 siblings, 0 replies; 9+ messages in thread
From: Ahmad Fatoum @ 2019-08-27 14:32 UTC (permalink / raw)
To: barebox
If we don't do this, the barebox main may fail to parse arguments.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
---
arch/sandbox/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/sandbox/Makefile b/arch/sandbox/Makefile
index 85c70b5e8059..2a75b81cf632 100644
--- a/arch/sandbox/Makefile
+++ b/arch/sandbox/Makefile
@@ -23,7 +23,8 @@ CFLAGS += -Dmalloc=barebox_malloc -Dcalloc=barebox_calloc \
-Dglob=barebox_glob -Dglobfree=barebox_globfree \
-Dioctl=barebox_ioctl -Dfstat=barebox_fstat \
-Dopendir=barebox_opendir -Dreaddir=barebox_readdir \
- -Dclosedir=barebox_closedir
+ -Dclosedir=barebox_closedir \
+ -Doptarg=barebox_optarg -Doptind=barebox_optind
machdirs := $(patsubst %,arch/sandbox/mach-%/,$(machine-y))
--
2.20.1
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^ permalink raw reply [flat|nested] 9+ messages in thread* [PATCH 4/6] sandbox: compile with symbol -fvisibility=hidden
2019-08-27 14:32 [PATCH 0/6] sandbox: add HWRNG driver for host /dev/random Ahmad Fatoum
` (2 preceding siblings ...)
2019-08-27 14:32 ` [PATCH 3/6] sandbox: redefine optarg and optind to avoid collisions Ahmad Fatoum
@ 2019-08-27 14:32 ` Ahmad Fatoum
2019-08-27 14:32 ` [PATCH 5/6] sandbox: hostfile: allow probing from device tree Ahmad Fatoum
2019-08-27 14:32 ` [PATCH 6/6] hwrng: add sandbox driver interface to host /dev/random Ahmad Fatoum
5 siblings, 0 replies; 9+ messages in thread
From: Ahmad Fatoum @ 2019-08-27 14:32 UTC (permalink / raw)
To: barebox
barebox defines many symbols that are reserved for the C implementation.
This collides with the libc, when building barebox for ARCH=sandbox.
Specify -fvsibility-hidden, so libraries barebox is linked against don't
inadvertently use barebox' functions.
This fixes a heap corruption occurring when issuing fb0.enable=1 on my
system, because X11 used strdup out of barebox, but free out of glibc[1]:
binding file /lib/x86_64-linux-gnu/libX11.so.6 [0] to
./barebox [0]: normal symbol l `strdup' [GLIBC_2.2.5]
[...]
binding file /lib/x86_64-linux-gnu/libc.so.6 [0] to
/lib/x86_64-linux-gnu/libc.so.6 [0]: normal symbol `free' [GLIBC_2.2.5]
[1]: cf. CFLAGS +=-Dfree=barebox_free in arch/sandbox/Makefile
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
---
arch/sandbox/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/sandbox/Makefile b/arch/sandbox/Makefile
index 2a75b81cf632..780783a1e08c 100644
--- a/arch/sandbox/Makefile
+++ b/arch/sandbox/Makefile
@@ -1,6 +1,7 @@
KBUILD_DEFCONFIG := sandbox_defconfig
-CPPFLAGS += -D__SANDBOX__ -fno-strict-aliasing
+CPPFLAGS += -D__SANDBOX__ -fno-strict-aliasing -fvisibility=hidden
+
machine-y := sandbox
--
2.20.1
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^ permalink raw reply [flat|nested] 9+ messages in thread* [PATCH 5/6] sandbox: hostfile: allow probing from device tree
2019-08-27 14:32 [PATCH 0/6] sandbox: add HWRNG driver for host /dev/random Ahmad Fatoum
` (3 preceding siblings ...)
2019-08-27 14:32 ` [PATCH 4/6] sandbox: compile with symbol -fvisibility=hidden Ahmad Fatoum
@ 2019-08-27 14:32 ` Ahmad Fatoum
2019-08-28 11:49 ` Sascha Hauer
2019-08-27 14:32 ` [PATCH 6/6] hwrng: add sandbox driver interface to host /dev/random Ahmad Fatoum
5 siblings, 1 reply; 9+ messages in thread
From: Ahmad Fatoum @ 2019-08-27 14:32 UTC (permalink / raw)
To: barebox
When testing things like barebox state in sandbox, it's nice to be able
to refer to a partition on a hostfile by phandle. Support this by
checking for reading the barebox,filename property.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
---
arch/sandbox/board/hostfile.c | 16 ++++--
arch/sandbox/dts/sandbox-state.dtsi | 50 +++++++++++++++++++
.../sandbox/mach-sandbox/include/mach/linux.h | 1 +
arch/sandbox/os/common.c | 5 ++
4 files changed, 68 insertions(+), 4 deletions(-)
create mode 100644 arch/sandbox/dts/sandbox-state.dtsi
diff --git a/arch/sandbox/board/hostfile.c b/arch/sandbox/board/hostfile.c
index 745f078d1a79..e5a7580d0792 100644
--- a/arch/sandbox/board/hostfile.c
+++ b/arch/sandbox/board/hostfile.c
@@ -84,15 +84,16 @@ static int hf_probe(struct device_d *dev)
if (!dev->device_node)
return -ENODEV;
- err = of_property_read_u32(dev->device_node, "barebox,fd", &priv->fd);
- if (err)
- return err;
+ of_property_read_u32(dev->device_node, "barebox,fd", &priv->fd);
err = of_property_read_string(dev->device_node, "barebox,filename",
&priv->filename);
if (err)
return err;
+ if (!priv->fd)
+ priv->fd = linux_open(priv->filename, true);
+
priv->cdev.name = dev->device_node->name;
priv->cdev.dev = dev;
priv->cdev.ops = &hf_fops;
@@ -101,7 +102,14 @@ static int hf_probe(struct device_d *dev)
dev->info = hf_info;
dev->priv = priv;
- return devfs_create(&priv->cdev);
+ err = devfs_create(&priv->cdev);
+ if (err)
+ return err;
+
+ of_parse_partitions(&priv->cdev, dev->device_node);
+ of_partitions_register_fixup(&priv->cdev);
+
+ return 0;
}
static __maybe_unused struct of_device_id hostfile_dt_ids[] = {
diff --git a/arch/sandbox/dts/sandbox-state.dtsi b/arch/sandbox/dts/sandbox-state.dtsi
new file mode 100644
index 000000000000..fc17bd078899
--- /dev/null
+++ b/arch/sandbox/dts/sandbox-state.dtsi
@@ -0,0 +1,50 @@
+/ {
+ aliases {
+ state = &state;
+ };
+
+ disk {
+ compatible = "barebox,hostfile";
+ barebox,filename = "disk";
+ reg = <0x0 0x0 0x100000>;
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ hostfile_state: state@0 {
+ reg = <0x0 0x1000>;
+ label = "state";
+ };
+ };
+ };
+
+ state: state {
+ magic = <0xaa3b86a6>;
+ compatible = "barebox,state";
+ backend-type = "raw";
+ backend = <&hostfile_state>;
+ backend-storage-type = "direct";
+ backend-stridesize = <64>;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+ vars {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ x {
+ reg = <0x0 0x4>;
+ type = "uint32";
+ default = <1>;
+ };
+
+ y {
+ reg = <0x4 0x4>;
+ type = "uint32";
+ default = <3>;
+ };
+ };
+ };
+};
diff --git a/arch/sandbox/mach-sandbox/include/mach/linux.h b/arch/sandbox/mach-sandbox/include/mach/linux.h
index 7d0ed55735e7..c344285473e6 100644
--- a/arch/sandbox/mach-sandbox/include/mach/linux.h
+++ b/arch/sandbox/mach-sandbox/include/mach/linux.h
@@ -10,6 +10,7 @@ struct fb_bitfield;
int linux_register_device(const char *name, void *start, void *end);
int tap_alloc(const char *dev);
uint64_t linux_get_time(void);
+int linux_open(const char *filename, int readwrite);
int linux_read(int fd, void *buf, size_t count);
int linux_read_nonblock(int fd, void *buf, size_t count);
ssize_t linux_write(int fd, const void *buf, size_t count);
diff --git a/arch/sandbox/os/common.c b/arch/sandbox/os/common.c
index a7ea8f2d3b18..86118822a177 100644
--- a/arch/sandbox/os/common.c
+++ b/arch/sandbox/os/common.c
@@ -121,6 +121,11 @@ void __attribute__((noreturn)) linux_exit(void)
exit(0);
}
+int linux_open(const char *filename, int readwrite)
+{
+ return open(filename, readwrite ? O_RDWR : O_RDONLY);
+}
+
int linux_read(int fd, void *buf, size_t count)
{
ssize_t ret;
--
2.20.1
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^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [PATCH 5/6] sandbox: hostfile: allow probing from device tree
2019-08-27 14:32 ` [PATCH 5/6] sandbox: hostfile: allow probing from device tree Ahmad Fatoum
@ 2019-08-28 11:49 ` Sascha Hauer
2019-08-28 12:06 ` Ahmad Fatoum
0 siblings, 1 reply; 9+ messages in thread
From: Sascha Hauer @ 2019-08-28 11:49 UTC (permalink / raw)
To: Ahmad Fatoum, g; +Cc: barebox
On Tue, Aug 27, 2019 at 04:32:38PM +0200, Ahmad Fatoum wrote:
> When testing things like barebox state in sandbox, it's nice to be able
> to refer to a partition on a hostfile by phandle. Support this by
> checking for reading the barebox,filename property.
>
> Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
> ---
> arch/sandbox/board/hostfile.c | 16 ++++--
> arch/sandbox/dts/sandbox-state.dtsi | 50 +++++++++++++++++++
> .../sandbox/mach-sandbox/include/mach/linux.h | 1 +
> arch/sandbox/os/common.c | 5 ++
> 4 files changed, 68 insertions(+), 4 deletions(-)
> create mode 100644 arch/sandbox/dts/sandbox-state.dtsi
>
> diff --git a/arch/sandbox/board/hostfile.c b/arch/sandbox/board/hostfile.c
> index 745f078d1a79..e5a7580d0792 100644
> --- a/arch/sandbox/board/hostfile.c
> +++ b/arch/sandbox/board/hostfile.c
> @@ -84,15 +84,16 @@ static int hf_probe(struct device_d *dev)
> if (!dev->device_node)
> return -ENODEV;
>
> - err = of_property_read_u32(dev->device_node, "barebox,fd", &priv->fd);
> - if (err)
> - return err;
> + of_property_read_u32(dev->device_node, "barebox,fd", &priv->fd);
>
> err = of_property_read_string(dev->device_node, "barebox,filename",
> &priv->filename);
> if (err)
> return err;
>
> + if (!priv->fd)
> + priv->fd = linux_open(priv->filename, true);
> +
> priv->cdev.name = dev->device_node->name;
> priv->cdev.dev = dev;
> priv->cdev.ops = &hf_fops;
> @@ -101,7 +102,14 @@ static int hf_probe(struct device_d *dev)
> dev->info = hf_info;
> dev->priv = priv;
>
> - return devfs_create(&priv->cdev);
> + err = devfs_create(&priv->cdev);
> + if (err)
> + return err;
> +
> + of_parse_partitions(&priv->cdev, dev->device_node);
> + of_partitions_register_fixup(&priv->cdev);
> +
> + return 0;
> }
>
> static __maybe_unused struct of_device_id hostfile_dt_ids[] = {
> diff --git a/arch/sandbox/dts/sandbox-state.dtsi b/arch/sandbox/dts/sandbox-state.dtsi
> new file mode 100644
> index 000000000000..fc17bd078899
> --- /dev/null
> +++ b/arch/sandbox/dts/sandbox-state.dtsi
> @@ -0,0 +1,50 @@
This file doesn't belong into this patch.
Applied 1-4 for now.
Sascha
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH 6/6] hwrng: add sandbox driver interface to host /dev/random
2019-08-27 14:32 [PATCH 0/6] sandbox: add HWRNG driver for host /dev/random Ahmad Fatoum
` (4 preceding siblings ...)
2019-08-27 14:32 ` [PATCH 5/6] sandbox: hostfile: allow probing from device tree Ahmad Fatoum
@ 2019-08-27 14:32 ` Ahmad Fatoum
5 siblings, 0 replies; 9+ messages in thread
From: Ahmad Fatoum @ 2019-08-27 14:32 UTC (permalink / raw)
To: barebox
Linux as well as other operating systems can provide /dev/random and
/dev/urandom device to service userspace need for randomness.
Add a driver to use /dev/random for blocking and /dev/urandom for
non-blocking barebox random numbers.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
---
arch/sandbox/board/Makefile | 1 +
arch/sandbox/board/board.c | 7 +++
arch/sandbox/board/dev-random.c | 24 +++++++
.../sandbox/mach-sandbox/include/mach/linux.h | 7 +++
drivers/hw_random/Kconfig | 8 +++
drivers/hw_random/Makefile | 1 +
drivers/hw_random/dev-random.c | 63 +++++++++++++++++++
7 files changed, 111 insertions(+)
create mode 100644 arch/sandbox/board/dev-random.c
create mode 100644 drivers/hw_random/dev-random.c
diff --git a/arch/sandbox/board/Makefile b/arch/sandbox/board/Makefile
index b6c271c858c6..26f6cb192269 100644
--- a/arch/sandbox/board/Makefile
+++ b/arch/sandbox/board/Makefile
@@ -5,5 +5,6 @@ obj-y += console.o
obj-y += devices.o
obj-y += dtb.o
obj-y += poweroff.o
+obj-y += dev-random.o
extra-y += barebox.lds
diff --git a/arch/sandbox/board/board.c b/arch/sandbox/board/board.c
index 1f6392d15ed3..ad2bc910c342 100644
--- a/arch/sandbox/board/board.c
+++ b/arch/sandbox/board/board.c
@@ -42,6 +42,11 @@ static struct device_d sdl_device = {
.platform_data = &mode,
};
+static struct device_d devrandom_device = {
+ .id = DEVICE_ID_DYNAMIC,
+ .name = "devrandom",
+};
+
static int devices_init(void)
{
platform_device_register(&tap_device);
@@ -54,6 +59,8 @@ static int devices_init(void)
platform_device_register(&sdl_device);
+ platform_device_register(&devrandom_device);
+
return 0;
}
diff --git a/arch/sandbox/board/dev-random.c b/arch/sandbox/board/dev-random.c
new file mode 100644
index 000000000000..f65e5ef6e5ed
--- /dev/null
+++ b/arch/sandbox/board/dev-random.c
@@ -0,0 +1,24 @@
+#include <common.h>
+#include <mach/linux.h>
+
+devrandom_t *devrandom_init(void) {
+ devrandom_t *fds = xzalloc(sizeof(*fds));
+
+ fds->randomfd = linux_open("/dev/random", false);
+ if (fds->randomfd < 0)
+ return ERR_PTR(-EPERM);
+
+ fds->urandomfd = linux_open("/dev/urandom", false);
+ if (fds->urandomfd < 0)
+ return ERR_PTR(-EPERM);
+
+ return fds;
+}
+
+int devrandom_read(devrandom_t *devrandom, void *buf, size_t len, int wait)
+{
+ if (wait)
+ return linux_read(devrandom->randomfd, buf, len);
+
+ return linux_read(devrandom->urandomfd, buf, len);
+}
diff --git a/arch/sandbox/mach-sandbox/include/mach/linux.h b/arch/sandbox/mach-sandbox/include/mach/linux.h
index c344285473e6..1e64d41c6a5e 100644
--- a/arch/sandbox/mach-sandbox/include/mach/linux.h
+++ b/arch/sandbox/mach-sandbox/include/mach/linux.h
@@ -51,4 +51,11 @@ void barebox_libftdi1_gpio_set_value(struct ft2232_bitbang *ftbb,
int barebox_libftdi1_update(struct ft2232_bitbang *ftbb);
void barebox_libftdi1_close(void);
+typedef struct {
+ int randomfd;
+ int urandomfd;
+} devrandom_t;
+devrandom_t *devrandom_init(void);
+int devrandom_read(devrandom_t *devrandom, void *buf, size_t len, int wait);
+
#endif /* __ASM_ARCH_LINUX_H */
diff --git a/drivers/hw_random/Kconfig b/drivers/hw_random/Kconfig
index d1297a48d0bb..c57928204d30 100644
--- a/drivers/hw_random/Kconfig
+++ b/drivers/hw_random/Kconfig
@@ -14,4 +14,12 @@ config HWRNG_MXC_RNGC
This driver provides kernel-side support for the Random Number
Generator hardware found on some Freescale i.MX processors.
+config HWRNG_DEV_RANDOM
+ tristate "Linux /dev/random and /dev/urandom RNG"
+ depends on SANDBOX
+ default y
+ help
+ This driver allows use of the host provided /dev/random
+ and /dev/urandom as barebox HWRNGs.
+
endif
diff --git a/drivers/hw_random/Makefile b/drivers/hw_random/Makefile
index 79c238c48d60..8be62f38b740 100644
--- a/drivers/hw_random/Makefile
+++ b/drivers/hw_random/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_HWRNG) += core.o
obj-$(CONFIG_HWRNG_MXC_RNGC) += mxc-rngc.o
+obj-$(CONFIG_HWRNG_DEV_RANDOM) += dev-random.o
diff --git a/drivers/hw_random/dev-random.c b/drivers/hw_random/dev-random.c
new file mode 100644
index 000000000000..2170db7437ce
--- /dev/null
+++ b/drivers/hw_random/dev-random.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Ahmad Fatoum, Pengutronix
+ */
+
+#include <common.h>
+#include <init.h>
+#include <linux/hw_random.h>
+#include <mach/linux.h>
+
+struct devrandom_rnd {
+ struct hwrng hwrng;
+ devrandom_t *priv;
+};
+
+static inline struct devrandom_rnd *to_rnd(struct hwrng *hwrng)
+{
+ return container_of(hwrng, struct devrandom_rnd, hwrng);
+}
+
+static int devrandom_rnd_read(struct hwrng *hwrng, void *buf, size_t max, bool wait)
+{
+ return devrandom_read(to_rnd(hwrng)->priv, buf, max, wait);
+}
+
+static int devrandom_rnd_init(struct hwrng *hwrng)
+{
+ devrandom_t *devrandom = devrandom_init();
+ if (IS_ERR(devrandom))
+ return PTR_ERR(devrandom);
+
+ to_rnd(hwrng)->priv = devrandom;
+ return 0;
+}
+
+static int devrandom_rnd_probe(struct device_d *dev)
+{
+ struct devrandom_rnd *rnd;
+ int ret;
+
+ rnd = xzalloc(sizeof(*rnd));
+
+ rnd->hwrng.name = dev->name;
+ rnd->hwrng.read = devrandom_rnd_read;
+ rnd->hwrng.init = devrandom_rnd_init;
+
+ ret = hwrng_register(dev, &rnd->hwrng);
+ if (ret) {
+ dev_err(dev, "failed to register: %s\n", strerror(-ret));
+
+ return ret;
+ }
+
+ dev_info(dev, "Registered.\n");
+
+ return 0;
+}
+
+static struct driver_d devrandom_rnd_driver = {
+ .name = "devrandom",
+ .probe = devrandom_rnd_probe,
+};
+device_platform_driver(devrandom_rnd_driver);
--
2.20.1
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^ permalink raw reply [flat|nested] 9+ messages in thread