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Message-Id: <20241202-sysfs-const-bin_attr-hid-v1-10-16369423a48a@weissschuh.net>
Date: Mon, 02 Dec 2024 20:01:41 +0100
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Jiri Kosina <jikos@...nel.org>, Benjamin Tissoires <bentiss@...nel.org>,
Stefan Achatz <erazor_de@...rs.sourceforge.net>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH 10/10] HID: roccat: pyro: constify 'struct bin_attribute'
The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that to protect them against
accidental or malicious modifications.
Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
drivers/hid/hid-roccat-pyra.c | 50 +++++++++++++++++++++----------------------
1 file changed, 25 insertions(+), 25 deletions(-)
diff --git a/drivers/hid/hid-roccat-pyra.c b/drivers/hid/hid-roccat-pyra.c
index eeb3d38cd80584bd716ad493cff2892a2d5af552..2b53fbfbb8979ad1d1994e462b624b3f72480447 100644
--- a/drivers/hid/hid-roccat-pyra.c
+++ b/drivers/hid/hid-roccat-pyra.c
@@ -129,8 +129,8 @@ static ssize_t pyra_sysfs_write(struct file *fp, struct kobject *kobj,
#define PYRA_SYSFS_W(thingy, THINGY) \
static ssize_t pyra_sysfs_write_ ## thingy(struct file *fp, \
- struct kobject *kobj, struct bin_attribute *attr, char *buf, \
- loff_t off, size_t count) \
+ struct kobject *kobj, const struct bin_attribute *attr, \
+ char *buf, loff_t off, size_t count) \
{ \
return pyra_sysfs_write(fp, kobj, buf, off, count, \
PYRA_SIZE_ ## THINGY, PYRA_COMMAND_ ## THINGY); \
@@ -138,8 +138,8 @@ static ssize_t pyra_sysfs_write_ ## thingy(struct file *fp, \
#define PYRA_SYSFS_R(thingy, THINGY) \
static ssize_t pyra_sysfs_read_ ## thingy(struct file *fp, \
- struct kobject *kobj, struct bin_attribute *attr, char *buf, \
- loff_t off, size_t count) \
+ struct kobject *kobj, const struct bin_attribute *attr, \
+ char *buf, loff_t off, size_t count) \
{ \
return pyra_sysfs_read(fp, kobj, buf, off, count, \
PYRA_SIZE_ ## THINGY, PYRA_COMMAND_ ## THINGY); \
@@ -151,27 +151,27 @@ PYRA_SYSFS_R(thingy, THINGY)
#define PYRA_BIN_ATTRIBUTE_RW(thingy, THINGY) \
PYRA_SYSFS_RW(thingy, THINGY); \
-static struct bin_attribute bin_attr_##thingy = { \
+static const struct bin_attribute bin_attr_##thingy = { \
.attr = { .name = #thingy, .mode = 0660 }, \
.size = PYRA_SIZE_ ## THINGY, \
- .read = pyra_sysfs_read_ ## thingy, \
- .write = pyra_sysfs_write_ ## thingy \
+ .read_new = pyra_sysfs_read_ ## thingy, \
+ .write_new = pyra_sysfs_write_ ## thingy \
}
#define PYRA_BIN_ATTRIBUTE_R(thingy, THINGY) \
PYRA_SYSFS_R(thingy, THINGY); \
-static struct bin_attribute bin_attr_##thingy = { \
+static const struct bin_attribute bin_attr_##thingy = { \
.attr = { .name = #thingy, .mode = 0440 }, \
- .size = PYRA_SIZE_ ## THINGY, \
- .read = pyra_sysfs_read_ ## thingy, \
+ .size_new = PYRA_SIZE_ ## THINGY, \
+ .read_new = pyra_sysfs_read_ ## thingy, \
}
#define PYRA_BIN_ATTRIBUTE_W(thingy, THINGY) \
PYRA_SYSFS_W(thingy, THINGY); \
-static struct bin_attribute bin_attr_##thingy = { \
+static const struct bin_attribute bin_attr_##thingy = { \
.attr = { .name = #thingy, .mode = 0220 }, \
.size = PYRA_SIZE_ ## THINGY, \
- .write = pyra_sysfs_write_ ## thingy \
+ .write_new = pyra_sysfs_write_ ## thingy \
}
PYRA_BIN_ATTRIBUTE_W(control, CONTROL);
@@ -180,8 +180,8 @@ PYRA_BIN_ATTRIBUTE_RW(profile_settings, PROFILE_SETTINGS);
PYRA_BIN_ATTRIBUTE_RW(profile_buttons, PROFILE_BUTTONS);
static ssize_t pyra_sysfs_read_profilex_settings(struct file *fp,
- struct kobject *kobj, struct bin_attribute *attr, char *buf,
- loff_t off, size_t count)
+ struct kobject *kobj, const struct bin_attribute *attr,
+ char *buf, loff_t off, size_t count)
{
struct device *dev = kobj_to_dev(kobj)->parent->parent;
struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
@@ -198,8 +198,8 @@ static ssize_t pyra_sysfs_read_profilex_settings(struct file *fp,
}
static ssize_t pyra_sysfs_read_profilex_buttons(struct file *fp,
- struct kobject *kobj, struct bin_attribute *attr, char *buf,
- loff_t off, size_t count)
+ struct kobject *kobj, const struct bin_attribute *attr,
+ char *buf, loff_t off, size_t count)
{
struct device *dev = kobj_to_dev(kobj)->parent->parent;
struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
@@ -216,16 +216,16 @@ static ssize_t pyra_sysfs_read_profilex_buttons(struct file *fp,
}
#define PROFILE_ATTR(number) \
-static struct bin_attribute bin_attr_profile##number##_settings = { \
+static const struct bin_attribute bin_attr_profile##number##_settings = { \
.attr = { .name = "profile" #number "_settings", .mode = 0440 }, \
.size = PYRA_SIZE_PROFILE_SETTINGS, \
- .read = pyra_sysfs_read_profilex_settings, \
+ .read_new = pyra_sysfs_read_profilex_settings, \
.private = &profile_numbers[number-1], \
}; \
-static struct bin_attribute bin_attr_profile##number##_buttons = { \
+static const struct bin_attribute bin_attr_profile##number##_buttons = { \
.attr = { .name = "profile" #number "_buttons", .mode = 0440 }, \
.size = PYRA_SIZE_PROFILE_BUTTONS, \
- .read = pyra_sysfs_read_profilex_buttons, \
+ .read_new = pyra_sysfs_read_profilex_buttons, \
.private = &profile_numbers[number-1], \
};
PROFILE_ATTR(1);
@@ -235,8 +235,8 @@ PROFILE_ATTR(4);
PROFILE_ATTR(5);
static ssize_t pyra_sysfs_write_settings(struct file *fp,
- struct kobject *kobj, struct bin_attribute *attr, char *buf,
- loff_t off, size_t count)
+ struct kobject *kobj, const struct bin_attribute *attr,
+ char *buf, loff_t off, size_t count)
{
struct device *dev = kobj_to_dev(kobj)->parent->parent;
struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
@@ -273,7 +273,7 @@ static ssize_t pyra_sysfs_write_settings(struct file *fp,
}
PYRA_SYSFS_R(settings, SETTINGS);
-static struct bin_attribute bin_attr_settings =
+static const struct bin_attribute bin_attr_settings =
__BIN_ATTR(settings, (S_IWUSR | S_IRUGO),
pyra_sysfs_read_settings, pyra_sysfs_write_settings,
PYRA_SIZE_SETTINGS);
@@ -334,7 +334,7 @@ static struct attribute *pyra_attrs[] = {
NULL,
};
-static struct bin_attribute *pyra_bin_attributes[] = {
+static const struct bin_attribute *const pyra_bin_attributes[] = {
&bin_attr_control,
&bin_attr_info,
&bin_attr_profile_settings,
@@ -355,7 +355,7 @@ static struct bin_attribute *pyra_bin_attributes[] = {
static const struct attribute_group pyra_group = {
.attrs = pyra_attrs,
- .bin_attrs = pyra_bin_attributes,
+ .bin_attrs_new = pyra_bin_attributes,
};
static const struct attribute_group *pyra_groups[] = {
--
2.47.1
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