On Mon, Dec 05, 2022 at 09:39:29PM +0800, liulongfang wrote:
On 2022/12/2 23:17, Jason Gunthorpe wrote:
On Fri, Dec 02, 2022 at 05:26:21PM +0800, Longfang Liu wrote:
+static ssize_t vfio_pci_vf_state_read(struct file *filp, char __user *buffer,
size_t count, loff_t *pos)+{
This would be better to use debugfs_create_devm_seqfile()
Then you can simply use seq_printf()
The previous debugfs used this method in my patch. Is it now recommended to use the interface with "devm" ?
It doesn't matter, the point is not the devm, it is to use the right helper for the data you want to expose over debugfs
@@ -119,6 +129,8 @@ struct vfio_migration_ops { enum vfio_device_mig_state *curr_state); int (*migration_get_data_size)(struct vfio_device *device, unsigned long *stop_copy_length);
- int (*migration_get_data)(struct vfio_device *device, char *buffer);
- int (*migration_get_attr)(struct vfio_device *device, char *buffer);
Still no to passing through debugfs ops, create these files in the driver.
If this part is also created and enabled in the device driver, why do we need to put this debugfs in the vfio public framework?
To create the directory, and the few actually common files
Jason