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Bluetooth: Add support hdev to allocate private data

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This patch adds support hdev to allocate extra size for private data.
The size of private data is specified in the hdev_alloc_size(priv_size)
and the allocated buffer can be accessed with hci_get_priv(hdev).

Signed-off-by: Tedd Ho-Jeong An <tedd.an@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Tedd Ho-Jeong An 2021-08-04 17:32:08 -07:00 • committed by Marcel Holtmann
parent 713baf3dae
commit 6ec566131d
2 changed files with 22 additions and 4 deletions
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13
include/net/bluetooth/hci_core.h
View file

@ -1224,10 +1224,21 @@ static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
dev_set_drvdata(&hdev->dev, data);
}
static inline void *hci_get_priv(struct hci_dev *hdev)
{
return (char *)hdev + sizeof(*hdev);
}
struct hci_dev *hci_dev_get(int index);
struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
struct hci_dev *hci_alloc_dev(void);
struct hci_dev *hci_alloc_dev_priv(int sizeof_priv);
static inline struct hci_dev *hci_alloc_dev(void)
{
return hci_alloc_dev_priv(0);
}
void hci_free_dev(struct hci_dev *hdev);
int hci_register_dev(struct hci_dev *hdev);
void hci_unregister_dev(struct hci_dev *hdev);

13
net/bluetooth/hci_core.c
View file

@ -3751,11 +3751,18 @@ done:
}
/* Alloc HCI device */
struct hci_dev *hci_alloc_dev(void)
struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
{
struct hci_dev *hdev;
unsigned int alloc_size;
hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
alloc_size = sizeof(*hdev);
if (sizeof_priv) {
/* Fixme: May need ALIGN-ment? */
alloc_size += sizeof_priv;
}
hdev = kzalloc(alloc_size, GFP_KERNEL);
if (!hdev)
return NULL;
@ -3869,7 +3876,7 @@ struct hci_dev *hci_alloc_dev(void)
return hdev;
}
EXPORT_SYMBOL(hci_alloc_dev);
EXPORT_SYMBOL(hci_alloc_dev_priv);
/* Free HCI device */
void hci_free_dev(struct hci_dev *hdev)