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vhost-user: update protocol features and commands list

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vhost-user protocol specification has been updated with
feature flags and commands we will need to implement migration.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
[sbrivio: Fix comment to union vhost_user_payload]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Laurent Vivier 2024-12-19 12:13:53 +01:00 committed by Stefano Brivio
parent a8f4fc481c
commit 6016e04a3a
2 changed files with 44 additions and 1 deletions
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5
vhost_user.c
View File

@ -110,6 +110,11 @@ static const char *vu_request_to_string(unsigned int req)
REQ(VHOST_USER_GET_MAX_MEM_SLOTS),
REQ(VHOST_USER_ADD_MEM_REG),
REQ(VHOST_USER_REM_MEM_REG),
REQ(VHOST_USER_SET_STATUS),
REQ(VHOST_USER_GET_STATUS),
REQ(VHOST_USER_GET_SHARED_OBJECT),
REQ(VHOST_USER_SET_DEVICE_STATE_FD),
REQ(VHOST_USER_CHECK_DEVICE_STATE),
};
#undef REQ
return vu_request_str[req];

40
vhost_user.h
View File

@ -37,6 +37,10 @@ enum vhost_user_protocol_feature {
VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD = 12,
VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS = 14,
VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS = 15,
VHOST_USER_PROTOCOL_F_STATUS = 16,
/* Feature 17 reserved for VHOST_USER_PROTOCOL_F_XEN_MMAP. */
VHOST_USER_PROTOCOL_F_SHARED_OBJECT = 18,
VHOST_USER_PROTOCOL_F_DEVICE_STATE = 19,
VHOST_USER_PROTOCOL_F_MAX
};
@ -83,6 +87,11 @@ enum vhost_user_request {
VHOST_USER_GET_MAX_MEM_SLOTS = 36,
VHOST_USER_ADD_MEM_REG = 37,
VHOST_USER_REM_MEM_REG = 38,
VHOST_USER_SET_STATUS = 39,
VHOST_USER_GET_STATUS = 40,
VHOST_USER_GET_SHARED_OBJECT = 41,
VHOST_USER_SET_DEVICE_STATE_FD = 42,
VHOST_USER_CHECK_DEVICE_STATE = 43,
VHOST_USER_MAX
};
@ -128,12 +137,39 @@ struct vhost_user_memory {
struct vhost_user_memory_region regions[VHOST_MEMORY_BASELINE_NREGIONS];
};
/**
* struct vhost_user_log - Address and size of the shared memory region used
* to log page update
* @mmap_size: Size of the shared memory region
* @mmap_offset: Offset of the shared memory region
*/
struct vhost_user_log {
uint64_t mmap_size;
uint64_t mmap_offset;
};
/**
* struct vhost_user_transfer_device_state - Set the direction and phase
* of the backend device state fd
* @direction: Device state transfer direction (save or load)
* @phase: Migration phase (only stopped is supported)
*/
struct vhost_user_transfer_device_state {
uint32_t direction;
#define VHOST_USER_TRANSFER_STATE_DIRECTION_SAVE 0
#define VHOST_USER_TRANSFER_STATE_DIRECTION_LOAD 1
uint32_t phase;
#define VHOST_USER_TRANSFER_STATE_PHASE_STOPPED 0
};
/**
* union vhost_user_payload - vhost-user message payload
* @u64: 64-bit payload
* @state: vring state payload
* @addr: vring addresses payload
* vhost_user_memory: Memory regions information payload
* @memory: Memory regions information payload
* @log: Memory logging payload
* @transfer_state: Device state payload
*/
union vhost_user_payload {
#define VHOST_USER_VRING_IDX_MASK 0xff
@ -142,6 +178,8 @@ union vhost_user_payload {
struct vhost_vring_state state;
struct vhost_vring_addr addr;
struct vhost_user_memory memory;
struct vhost_user_log log;
struct vhost_user_transfer_device_state transfer_state;
};
/**