#include <rte_vhost.h>

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)

Detailed Description

Device and vring operations.

Examples: examples/vdpa/main.c, examples/vhost/main.c, examples/vhost_blk/vhost_blk.c, and examples/vhost_crypto/main.c.

Definition at line 277 of file rte_vhost.h.

Field Documentation

◆ new_device

int(*) new_device(int vid)

Add device.

Examples: examples/vdpa/main.c, examples/vhost/main.c, examples/vhost_blk/vhost_blk.c, and examples/vhost_crypto/main.c.

Definition at line 278 of file rte_vhost.h.

◆ destroy_device

void(*) destroy_device(int vid)

Remove device.

Examples: examples/vdpa/main.c, examples/vhost/main.c, examples/vhost_blk/vhost_blk.c, and examples/vhost_crypto/main.c.

Definition at line 279 of file rte_vhost.h.

◆ vring_state_changed

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

triggered when a vring is enabled or disabled

Examples: examples/vhost/main.c.

Definition at line 281 of file rte_vhost.h.

◆ features_changed

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 289 of file rte_vhost.h.

◆ guest_notified

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 300 of file rte_vhost.h.

◆ guest_notify

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 308 of file rte_vhost.h.

The documentation for this struct was generated from the following file:

lib/vhost/rte_vhost.h

Data Fields