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Bluetooth: Add support for vectored writes to virtual HCI driver
The Bluetooth virtual HCI driver is using a misc character device to allow emulation of HCI devices from userspace. This change enables the support for vectored writes. Previously this was failing with EINVAL since no complete H:4 packet was written. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
parent
de8b582893
commit
5bc00b5c58
1 changed files with 18 additions and 11 deletions
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@ -141,22 +141,28 @@ static int vhci_create_device(struct vhci_data *data, __u8 dev_type)
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}
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}
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static inline ssize_t vhci_get_user(struct vhci_data *data,
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static inline ssize_t vhci_get_user(struct vhci_data *data,
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const char __user *buf, size_t count)
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const struct iovec *iov,
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unsigned long count)
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{
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{
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size_t len = iov_length(iov, count);
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struct sk_buff *skb;
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struct sk_buff *skb;
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__u8 pkt_type, dev_type;
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__u8 pkt_type, dev_type;
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unsigned long i;
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int ret;
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int ret;
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if (count < 2 || count > HCI_MAX_FRAME_SIZE)
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if (len < 2 || len > HCI_MAX_FRAME_SIZE)
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return -EINVAL;
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return -EINVAL;
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skb = bt_skb_alloc(count, GFP_KERNEL);
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skb = bt_skb_alloc(len, GFP_KERNEL);
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if (!skb)
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if (!skb)
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return -ENOMEM;
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return -ENOMEM;
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if (copy_from_user(skb_put(skb, count), buf, count)) {
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for (i = 0; i < count; i++) {
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kfree_skb(skb);
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if (copy_from_user(skb_put(skb, iov[i].iov_len),
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return -EFAULT;
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iov[i].iov_base, iov[i].iov_len)) {
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kfree_skb(skb);
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return -EFAULT;
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}
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}
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}
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pkt_type = *((__u8 *) skb->data);
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pkt_type = *((__u8 *) skb->data);
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@ -205,7 +211,7 @@ static inline ssize_t vhci_get_user(struct vhci_data *data,
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return -EINVAL;
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return -EINVAL;
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}
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}
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return (ret < 0) ? ret : count;
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return (ret < 0) ? ret : len;
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}
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}
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static inline ssize_t vhci_put_user(struct vhci_data *data,
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static inline ssize_t vhci_put_user(struct vhci_data *data,
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@ -272,12 +278,13 @@ static ssize_t vhci_read(struct file *file,
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return ret;
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return ret;
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}
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}
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static ssize_t vhci_write(struct file *file,
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static ssize_t vhci_write(struct kiocb *iocb, const struct iovec *iov,
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const char __user *buf, size_t count, loff_t *pos)
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unsigned long count, loff_t pos)
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{
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{
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struct file *file = iocb->ki_filp;
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struct vhci_data *data = file->private_data;
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struct vhci_data *data = file->private_data;
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return vhci_get_user(data, buf, count);
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return vhci_get_user(data, iov, count);
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}
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}
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static unsigned int vhci_poll(struct file *file, poll_table *wait)
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static unsigned int vhci_poll(struct file *file, poll_table *wait)
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@ -342,7 +349,7 @@ static int vhci_release(struct inode *inode, struct file *file)
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static const struct file_operations vhci_fops = {
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static const struct file_operations vhci_fops = {
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.owner = THIS_MODULE,
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.owner = THIS_MODULE,
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.read = vhci_read,
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.read = vhci_read,
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.write = vhci_write,
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.aio_write = vhci_write,
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.poll = vhci_poll,
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.poll = vhci_poll,
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.open = vhci_open,
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.open = vhci_open,
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.release = vhci_release,
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.release = vhci_release,
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