unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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vfio: Remove struct vfio_device_ops open/release

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Nothing uses this anymore, delete it.

Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Link: https://lore.kernel.org/r/14-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Jason Gunthorpe 2021-08-05 22:19:10 -03:00 committed by Alex Williamson
parent dd574d9b72
commit eb24c1007e
4 changed files with 1 additions and 46 deletions
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22
drivers/vfio/mdev/vfio_mdev.c
View file

@ -37,26 +37,6 @@ static void vfio_mdev_close_device(struct vfio_device *core_vdev)
parent->ops->close_device(mdev);
}
static int vfio_mdev_open(struct vfio_device *core_vdev)
{
struct mdev_device *mdev = to_mdev_device(core_vdev->dev);
struct mdev_parent *parent = mdev->type->parent;
if (unlikely(!parent->ops->open))
return 0;
return parent->ops->open(mdev);
}
static void vfio_mdev_release(struct vfio_device *core_vdev)
{
struct mdev_device *mdev = to_mdev_device(core_vdev->dev);
struct mdev_parent *parent = mdev->type->parent;
if (likely(parent->ops->release))
parent->ops->release(mdev);
}
static long vfio_mdev_unlocked_ioctl(struct vfio_device *core_vdev,
unsigned int cmd, unsigned long arg)
{
@ -122,8 +102,6 @@ static const struct vfio_device_ops vfio_mdev_dev_ops = {
.name = "vfio-mdev",
.open_device = vfio_mdev_open_device,
.close_device = vfio_mdev_close_device,
.open = vfio_mdev_open,
.release = vfio_mdev_release,
.ioctl = vfio_mdev_unlocked_ioctl,
.read = vfio_mdev_read,
.write = vfio_mdev_write,

14
drivers/vfio/vfio.c
View file

@ -1470,19 +1470,13 @@ static int vfio_group_get_device_fd(struct vfio_group *group, char *buf)
}
mutex_unlock(&device->dev_set->lock);
if (device->ops->open) {
ret = device->ops->open(device);
if (ret)
goto err_close_device;
}
/*
* We can't use anon_inode_getfd() because we need to modify
* the f_mode flags directly to allow more than just ioctls
*/
fdno = ret = get_unused_fd_flags(O_CLOEXEC);
if (ret < 0)
goto err_release;
goto err_close_device;
filep = anon_inode_getfile("[vfio-device]", &vfio_device_fops,
device, O_RDWR);
@ -1509,9 +1503,6 @@ static int vfio_group_get_device_fd(struct vfio_group *group, char *buf)
err_fd:
put_unused_fd(fdno);
err_release:
if (device->ops->release)
device->ops->release(device);
err_close_device:
mutex_lock(&device->dev_set->lock);
if (device->open_count == 1 && device->ops->close_device)
@ -1659,9 +1650,6 @@ static int vfio_device_fops_release(struct inode *inode, struct file *filep)
{
struct vfio_device *device = filep->private_data;
if (device->ops->release)
device->ops->release(device);
mutex_lock(&device->dev_set->lock);
if (!--device->open_count && device->ops->close_device)
device->ops->close_device(device);

7
include/linux/mdev.h
View file

@ -72,11 +72,6 @@ struct device *mtype_get_parent_dev(struct mdev_type *mtype);
* @mdev: mdev_device device structure which is being
* destroyed
* Returns integer: success (0) or error (< 0)
* @open: Open mediated device.
* @mdev: mediated device.
* Returns integer: success (0) or error (< 0)
* @release: release mediated device
* @mdev: mediated device.
* @read: Read emulation callback
* @mdev: mediated device structure
* @buf: read buffer
@ -113,8 +108,6 @@ struct mdev_parent_ops {
int (*remove)(struct mdev_device *mdev);
int (*open_device)(struct mdev_device *mdev);
void (*close_device)(struct mdev_device *mdev);
int (*open)(struct mdev_device *mdev);
void (*release)(struct mdev_device *mdev);
ssize_t (*read)(struct mdev_device *mdev, char __user *buf,
size_t count, loff_t *ppos);
ssize_t (*write)(struct mdev_device *mdev, const char __user *buf,

4
include/linux/vfio.h
View file

@ -46,8 +46,6 @@ struct vfio_device {
*
* @open_device: Called when the first file descriptor is opened for this device
* @close_device: Opposite of open_device
* @open: Called when userspace creates new file descriptor for device
* @release: Called when userspace releases file descriptor for device
* @read: Perform read(2) on device file descriptor
* @write: Perform write(2) on device file descriptor
* @ioctl: Perform ioctl(2) on device file descriptor, supporting VFIO_DEVICE_*
@ -62,8 +60,6 @@ struct vfio_device_ops {
char *name;
int (*open_device)(struct vfio_device *vdev);
void (*close_device)(struct vfio_device *vdev);
int (*open)(struct vfio_device *vdev);
void (*release)(struct vfio_device *vdev);
ssize_t (*read)(struct vfio_device *vdev, char __user *buf,
size_t count, loff_t *ppos);
ssize_t (*write)(struct vfio_device *vdev, const char __user *buf,