[char-misc-next 06/11] mei: bus: add name and uuid into device attributes
From: Tomas Winkler <hidden>
Date: 2015-05-07 12:55:11
Also in:
lkml
Subsystem:
char and misc drivers, intel management engine (mei), the rest · Maintainers:
Arnd Bergmann, Greg Kroah-Hartman, Alexander Usyskin, Linus Torvalds
Export name and uuid via sysfs and uevent Cc: linux-api@vger.kernel.org Signed-off-by: Tomas Winkler <redacted> --- Documentation/ABI/testing/sysfs-bus-mei | 14 ++++++++++++++ drivers/misc/mei/bus.c | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 47 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-mei b/Documentation/ABI/testing/sysfs-bus-mei
index 91967a70313a..20e4d1638bac 100644
--- a/Documentation/ABI/testing/sysfs-bus-mei
+++ b/Documentation/ABI/testing/sysfs-bus-mei@@ -5,3 +5,17 @@ Contact: Samuel Ortiz <sameo@linux.intel.com> linux-mei@linux.intel.com Description: Stores the same MODALIAS value emitted by uevent Format: mei:<mei device name>:<device uuid>: + +What: /sys/bus/mei/devices/.../name +Date: May 2015 +KernelVersion: 4.2 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: Stores mei client device name + Format: string + +What: /sys/bus/mei/devices/.../uuid +Date: May 2015 +KernelVersion: 4.2 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: Stores mei client device uuid + Format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index 17b00baa53b1..e76d94aa6e12 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c@@ -114,6 +114,31 @@ static int mei_cl_device_remove(struct device *dev) return driver->remove(device); } +static ssize_t name_show(struct device *dev, struct device_attribute *a, + char *buf) +{ + struct mei_cl_device *device = to_mei_cl_device(dev); + size_t len; + + len = snprintf(buf, PAGE_SIZE, "%s", device->name); + + return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; +} +static DEVICE_ATTR_RO(name); + +static ssize_t uuid_show(struct device *dev, struct device_attribute *a, + char *buf) +{ + struct mei_cl_device *device = to_mei_cl_device(dev); + const uuid_le *uuid = mei_me_cl_uuid(device->me_cl); + size_t len; + + len = snprintf(buf, PAGE_SIZE, "%pUl", uuid); + + return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; +} +static DEVICE_ATTR_RO(uuid); + static ssize_t modalias_show(struct device *dev, struct device_attribute *a, char *buf) {
@@ -129,6 +154,8 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *a, static DEVICE_ATTR_RO(modalias); static struct attribute *mei_cl_dev_attrs[] = { + &dev_attr_name.attr, + &dev_attr_uuid.attr, &dev_attr_modalias.attr, NULL, };
@@ -139,6 +166,12 @@ static int mei_cl_uevent(struct device *dev, struct kobj_uevent_env *env) struct mei_cl_device *device = to_mei_cl_device(dev); const uuid_le *uuid = mei_me_cl_uuid(device->me_cl); + if (add_uevent_var(env, "MEI_CL_UUID=%pUl", uuid)) + return -ENOMEM; + + if (add_uevent_var(env, "MEI_CL_NAME=%s", device->name)) + return -ENOMEM; + if (add_uevent_var(env, "MODALIAS=mei:%s:" MEI_CL_UUID_FMT ":", device->name, MEI_CL_UUID_ARGS(uuid->b))) return -ENOMEM;
--
2.1.0