diff options
Diffstat (limited to 'drivers/vfio/vfio_main.c')
| -rw-r--r-- | drivers/vfio/vfio_main.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index 5046cae05222..38c8e9350a60 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -28,6 +28,7 @@ #include <linux/pseudo_fs.h> #include <linux/rwsem.h> #include <linux/sched.h> +#include <linux/seq_file.h> #include <linux/slab.h> #include <linux/stat.h> #include <linux/string.h> @@ -1251,7 +1252,7 @@ static int vfio_ioctl_device_feature(struct vfio_device *device, feature.argsz - minsz); default: if (unlikely(!device->ops->device_feature)) - return -EINVAL; + return -ENOTTY; return device->ops->device_feature(device, feature.flags, arg->data, feature.argsz - minsz); @@ -1355,6 +1356,22 @@ static int vfio_device_fops_mmap(struct file *filep, struct vm_area_struct *vma) return device->ops->mmap(device, vma); } +#ifdef CONFIG_PROC_FS +static void vfio_device_show_fdinfo(struct seq_file *m, struct file *filep) +{ + char *path; + struct vfio_device_file *df = filep->private_data; + struct vfio_device *device = df->device; + + path = kobject_get_path(&device->dev->kobj, GFP_KERNEL); + if (!path) + return; + + seq_printf(m, "vfio-device-syspath: /sys%s\n", path); + kfree(path); +} +#endif + const struct file_operations vfio_device_fops = { .owner = THIS_MODULE, .open = vfio_device_fops_cdev_open, @@ -1364,6 +1381,9 @@ const struct file_operations vfio_device_fops = { .unlocked_ioctl = vfio_device_fops_unl_ioctl, .compat_ioctl = compat_ptr_ioctl, .mmap = vfio_device_fops_mmap, +#ifdef CONFIG_PROC_FS + .show_fdinfo = vfio_device_show_fdinfo, +#endif }; static struct vfio_device *vfio_device_from_file(struct file *file) |