Data Fields¶

int(* new_device )(int vid)
void(* destroy_device )(int vid)
int(* vring_state_changed )(int vid, uint16_t queue_id, int enable)
int(* features_changed )(int vid, uint64_t features)
void(* guest_notified )(int vid)
bool(* guest_notify )(int vid, uint16_t queue_id)

int(* new_device) (int vid)¶

Add device.

Definition at line 277 of file rte_vhost.h.

void(* destroy_device) (int vid)¶

Remove device.

Definition at line 278 of file rte_vhost.h.

int(* vring_state_changed) (int vid, uint16_t queue_id, int enable)¶

triggered when a vring is enabled or disabled

Definition at line 280 of file rte_vhost.h.

int(* features_changed) (int vid, uint64_t features)¶

Features could be changed after the feature negotiation. For example, VHOST_F_LOG_ALL will be set/cleared at the start/end of live migration, respectively. This callback is used to inform the application on such change.

Definition at line 288 of file rte_vhost.h.

void(* guest_notified) (int vid)¶

This callback gets called each time a guest gets notified about waiting packets. This is the interrupt handling through the eventfd_write(callfd), which can be used for counting these 'slow' syscalls.

Definition at line 299 of file rte_vhost.h.

bool(* guest_notify) (int vid, uint16_t queue_id)¶

If this callback is registered, notification to the guest can be handled by the front-end calling rte_vhost_notify_guest(). If it's not handled, 'false' should be returned. This can be used to remove the 'slow' eventfd_write() syscall from the datapath.

Definition at line 307 of file rte_vhost.h.