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Driver core: change add_uevent_var to use a struct

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This changes the uevent buffer functions to use a struct instead of a
long list of parameters. It does no longer require the caller to do the
proper buffer termination and size accounting, which is currently wrong
in some places. It fixes a known bug where parts of the uevent
environment are overwritten because of wrong index calculations.

Many thanks to Mathieu Desnoyers for finding bugs and improving the
error handling.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
2007-08-14 15:15:12 +02:00
committed by Greg Kroah-Hartman
parent 8380770c84
commit 7eff2e7a8b
47 changed files with 300 additions and 636 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/usb/core/driver.c
View File

@@ -576,12 +576,9 @@ static int usb_device_match(struct device *dev, struct device_driver *drv)
}
#ifdef CONFIG_HOTPLUG
static int usb_uevent(struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
static int usb_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct usb_device *usb_dev;
int i = 0;
int length = 0;
if (!dev)
return -ENODEV;
@@ -610,51 +607,39 @@ static int usb_uevent(struct device *dev, char **envp, int num_envp,
* all the device descriptors we don't tell them about. Or
* act as usermode drivers.
*/
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"DEVICE=/proc/bus/usb/%03d/%03d",
if (add_uevent_var(env, "DEVICE=/proc/bus/usb/%03d/%03d",
usb_dev->bus->busnum, usb_dev->devnum))
return -ENOMEM;
#endif
/* per-device configurations are common */
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"PRODUCT=%x/%x/%x",
if (add_uevent_var(env, "PRODUCT=%x/%x/%x",
le16_to_cpu(usb_dev->descriptor.idVendor),
le16_to_cpu(usb_dev->descriptor.idProduct),
le16_to_cpu(usb_dev->descriptor.bcdDevice)))
return -ENOMEM;
/* class-based driver binding models */
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"TYPE=%d/%d/%d",
if (add_uevent_var(env, "TYPE=%d/%d/%d",
usb_dev->descriptor.bDeviceClass,
usb_dev->descriptor.bDeviceSubClass,
usb_dev->descriptor.bDeviceProtocol))
return -ENOMEM;
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"BUSNUM=%03d",
if (add_uevent_var(env, "BUSNUM=%03d",
usb_dev->bus->busnum))
return -ENOMEM;
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"DEVNUM=%03d",
if (add_uevent_var(env, "DEVNUM=%03d",
usb_dev->devnum))
return -ENOMEM;
envp[i] = NULL;
return 0;
}
#else
static int usb_uevent(struct device *dev, char **envp,
int num_envp, char *buffer, int buffer_size)
static int usb_uevent(struct device *dev, struct kobj_uevent_env *env)
{
return -ENODEV;
}

28
drivers/usb/core/message.c
View File

@@ -1339,14 +1339,11 @@ void usb_release_interface(struct device *dev)
}
#ifdef CONFIG_HOTPLUG
static int usb_if_uevent(struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
static int usb_if_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct usb_device *usb_dev;
struct usb_interface *intf;
struct usb_host_interface *alt;
int i = 0;
int length = 0;
if (!dev)
return -ENODEV;
@@ -1359,39 +1356,30 @@ static int usb_if_uevent(struct device *dev, char **envp, int num_envp,
alt = intf->cur_altsetting;
#ifdef CONFIG_USB_DEVICEFS
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"DEVICE=/proc/bus/usb/%03d/%03d",
if (add_uevent_var(env, "DEVICE=/proc/bus/usb/%03d/%03d",
usb_dev->bus->busnum, usb_dev->devnum))
return -ENOMEM;
#endif
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"PRODUCT=%x/%x/%x",
if (add_uevent_var(env, "PRODUCT=%x/%x/%x",
le16_to_cpu(usb_dev->descriptor.idVendor),
le16_to_cpu(usb_dev->descriptor.idProduct),
le16_to_cpu(usb_dev->descriptor.bcdDevice)))
return -ENOMEM;
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"TYPE=%d/%d/%d",
if (add_uevent_var(env, "TYPE=%d/%d/%d",
usb_dev->descriptor.bDeviceClass,
usb_dev->descriptor.bDeviceSubClass,
usb_dev->descriptor.bDeviceProtocol))
return -ENOMEM;
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"INTERFACE=%d/%d/%d",
if (add_uevent_var(env, "INTERFACE=%d/%d/%d",
alt->desc.bInterfaceClass,
alt->desc.bInterfaceSubClass,
alt->desc.bInterfaceProtocol))
return -ENOMEM;
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
if (add_uevent_var(env,
"MODALIAS=usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic%02Xisc%02Xip%02X",
le16_to_cpu(usb_dev->descriptor.idVendor),
le16_to_cpu(usb_dev->descriptor.idProduct),
@@ -1404,14 +1392,12 @@ static int usb_if_uevent(struct device *dev, char **envp, int num_envp,
alt->desc.bInterfaceProtocol))
return -ENOMEM;
envp[i] = NULL;
return 0;
}
#else
static int usb_if_uevent(struct device *dev, char **envp,
int num_envp, char *buffer, int buffer_size)
static int usb_if_uevent(struct device *dev, struct kobj_uevent_env *env)
{
return -ENODEV;
}