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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#include <linux/device.h>#include <linux/debugfs.h>#include <linux/seq_file.h>#include <linux/vfio.h>#include "vfio.h"
static struct dentry *vfio_debugfs_root;
static int vfio_device_state_read(struct seq_file *seq, void *data){ struct device *vf_dev = seq->private; struct vfio_device *vdev = container_of(vf_dev, struct vfio_device, device); enum vfio_device_mig_state state; int ret;
BUILD_BUG_ON(VFIO_DEVICE_STATE_NR != VFIO_DEVICE_STATE_PRE_COPY_P2P + 1);
ret = vdev->mig_ops->migration_get_state(vdev, &state); if (ret) return -EINVAL;
switch (state) { case VFIO_DEVICE_STATE_ERROR: seq_puts(seq, "ERROR\n"); break; case VFIO_DEVICE_STATE_STOP: seq_puts(seq, "STOP\n"); break; case VFIO_DEVICE_STATE_RUNNING: seq_puts(seq, "RUNNING\n"); break; case VFIO_DEVICE_STATE_STOP_COPY: seq_puts(seq, "STOP_COPY\n"); break; case VFIO_DEVICE_STATE_RESUMING: seq_puts(seq, "RESUMING\n"); break; case VFIO_DEVICE_STATE_RUNNING_P2P: seq_puts(seq, "RUNNING_P2P\n"); break; case VFIO_DEVICE_STATE_PRE_COPY: seq_puts(seq, "PRE_COPY\n"); break; case VFIO_DEVICE_STATE_PRE_COPY_P2P: seq_puts(seq, "PRE_COPY_P2P\n"); break; default: seq_puts(seq, "Invalid\n"); }
return 0;}
static int vfio_device_features_read(struct seq_file *seq, void *data){ struct device *vf_dev = seq->private; struct vfio_device *vdev = container_of(vf_dev, struct vfio_device, device);
if (vdev->migration_flags & VFIO_MIGRATION_STOP_COPY) seq_puts(seq, "stop-copy\n"); if (vdev->migration_flags & VFIO_MIGRATION_P2P) seq_puts(seq, "p2p\n"); if (vdev->migration_flags & VFIO_MIGRATION_PRE_COPY) seq_puts(seq, "pre-copy\n"); if (vdev->log_ops) seq_puts(seq, "dirty-tracking\n");
return 0;}
void vfio_device_debugfs_init(struct vfio_device *vdev){ struct device *dev = &vdev->device;
vdev->debug_root = debugfs_create_dir(dev_name(vdev->dev), vfio_debugfs_root);
if (vdev->mig_ops) { struct dentry *vfio_dev_migration = NULL;
vfio_dev_migration = debugfs_create_dir("migration", vdev->debug_root); debugfs_create_devm_seqfile(dev, "state", vfio_dev_migration, vfio_device_state_read); debugfs_create_devm_seqfile(dev, "features", vfio_dev_migration, vfio_device_features_read); }}
void vfio_device_debugfs_exit(struct vfio_device *vdev){ debugfs_remove_recursive(vdev->debug_root); vdev->debug_root = NULL;}
void vfio_debugfs_create_root(void){ vfio_debugfs_root = debugfs_create_dir("vfio", NULL);}
void vfio_debugfs_remove_root(void){ debugfs_remove_recursive(vfio_debugfs_root); vfio_debugfs_root = NULL;}