mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 10:11:27 +01:00
mjw@wray-m-3.hpl.hp.com
8d3ebbb7a9
Tidy up messaging to device backends. Add message response handlers indexed by message id instead of relying on a queue of deferreds. Tidy up error handling so that deferred errors are caught.
255 lines
6.7 KiB
Python
255 lines
6.7 KiB
Python
import struct
|
|
|
|
from xen.lowlevel import xu
|
|
|
|
DEBUG = 0
|
|
|
|
""" All message formats.
|
|
Added to incrementally for the various message types.
|
|
See below.
|
|
"""
|
|
msg_formats = {}
|
|
|
|
#============================================================================
|
|
# Console message types.
|
|
#============================================================================
|
|
|
|
CMSG_CONSOLE = 0
|
|
|
|
console_formats = { 'console_data': (CMSG_CONSOLE, 0) }
|
|
|
|
msg_formats.update(console_formats)
|
|
|
|
#============================================================================
|
|
# Block interface message types.
|
|
#============================================================================
|
|
|
|
CMSG_BLKIF_BE = 1
|
|
CMSG_BLKIF_FE = 2
|
|
|
|
CMSG_BLKIF_FE_INTERFACE_STATUS_CHANGED = 0
|
|
CMSG_BLKIF_FE_DRIVER_STATUS_CHANGED = 32
|
|
CMSG_BLKIF_FE_INTERFACE_CONNECT = 33
|
|
CMSG_BLKIF_FE_INTERFACE_DISCONNECT = 34
|
|
|
|
CMSG_BLKIF_BE_CREATE = 0
|
|
CMSG_BLKIF_BE_DESTROY = 1
|
|
CMSG_BLKIF_BE_CONNECT = 2
|
|
CMSG_BLKIF_BE_DISCONNECT = 3
|
|
CMSG_BLKIF_BE_VBD_CREATE = 4
|
|
CMSG_BLKIF_BE_VBD_DESTROY = 5
|
|
CMSG_BLKIF_BE_VBD_GROW = 6
|
|
CMSG_BLKIF_BE_VBD_SHRINK = 7
|
|
CMSG_BLKIF_BE_DRIVER_STATUS_CHANGED = 32
|
|
|
|
BLKIF_DRIVER_STATUS_DOWN = 0
|
|
BLKIF_DRIVER_STATUS_UP = 1
|
|
|
|
BLKIF_INTERFACE_STATUS_DESTROYED = 0 #/* Interface doesn't exist. */
|
|
BLKIF_INTERFACE_STATUS_DISCONNECTED = 1 #/* Exists but is disconnected. */
|
|
BLKIF_INTERFACE_STATUS_CONNECTED = 2 #/* Exists and is connected. */
|
|
|
|
BLKIF_BE_STATUS_OKAY = 0
|
|
BLKIF_BE_STATUS_ERROR = 1
|
|
BLKIF_BE_STATUS_INTERFACE_EXISTS = 2
|
|
BLKIF_BE_STATUS_INTERFACE_NOT_FOUND = 3
|
|
BLKIF_BE_STATUS_INTERFACE_CONNECTED = 4
|
|
BLKIF_BE_STATUS_VBD_EXISTS = 5
|
|
BLKIF_BE_STATUS_VBD_NOT_FOUND = 6
|
|
BLKIF_BE_STATUS_OUT_OF_MEMORY = 7
|
|
BLKIF_BE_STATUS_EXTENT_NOT_FOUND = 8
|
|
BLKIF_BE_STATUS_MAPPING_ERROR = 9
|
|
|
|
blkif_formats = {
|
|
'blkif_be_connect_t':
|
|
(CMSG_BLKIF_BE, CMSG_BLKIF_BE_CONNECT),
|
|
|
|
'blkif_be_create_t':
|
|
(CMSG_BLKIF_BE, CMSG_BLKIF_BE_CREATE),
|
|
|
|
'blkif_be_disconnect_t':
|
|
(CMSG_BLKIF_BE, CMSG_BLKIF_BE_DISCONNECT),
|
|
|
|
'blkif_be_destroy_t':
|
|
(CMSG_BLKIF_BE, CMSG_BLKIF_BE_DESTROY),
|
|
|
|
'blkif_be_vbd_create_t':
|
|
(CMSG_BLKIF_BE, CMSG_BLKIF_BE_VBD_CREATE),
|
|
|
|
'blkif_be_vbd_grow_t':
|
|
(CMSG_BLKIF_BE, CMSG_BLKIF_BE_VBD_GROW),
|
|
|
|
'blkif_be_vbd_destroy_t':
|
|
(CMSG_BLKIF_BE, CMSG_BLKIF_BE_VBD_DESTROY),
|
|
|
|
'blkif_fe_interface_status_changed_t':
|
|
(CMSG_BLKIF_FE, CMSG_BLKIF_FE_INTERFACE_STATUS_CHANGED),
|
|
|
|
'blkif_fe_driver_status_changed_t':
|
|
(CMSG_BLKIF_FE, CMSG_BLKIF_FE_DRIVER_STATUS_CHANGED),
|
|
|
|
'blkif_fe_interface_connect_t':
|
|
(CMSG_BLKIF_FE, CMSG_BLKIF_FE_INTERFACE_CONNECT),
|
|
}
|
|
|
|
msg_formats.update(blkif_formats)
|
|
|
|
#============================================================================
|
|
# Network interface message types.
|
|
#============================================================================
|
|
|
|
CMSG_NETIF_BE = 3
|
|
CMSG_NETIF_FE = 4
|
|
|
|
CMSG_NETIF_FE_INTERFACE_STATUS_CHANGED = 0
|
|
CMSG_NETIF_FE_DRIVER_STATUS_CHANGED = 32
|
|
CMSG_NETIF_FE_INTERFACE_CONNECT = 33
|
|
CMSG_NETIF_FE_INTERFACE_DISCONNECT = 34
|
|
|
|
CMSG_NETIF_BE_CREATE = 0
|
|
CMSG_NETIF_BE_DESTROY = 1
|
|
CMSG_NETIF_BE_CONNECT = 2
|
|
CMSG_NETIF_BE_DISCONNECT = 3
|
|
CMSG_NETIF_BE_DRIVER_STATUS_CHANGED = 32
|
|
|
|
NETIF_INTERFACE_STATUS_DESTROYED = 0 #/* Interface doesn't exist. */
|
|
NETIF_INTERFACE_STATUS_DISCONNECTED = 1 #/* Exists but is disconnected. */
|
|
NETIF_INTERFACE_STATUS_CONNECTED = 2 #/* Exists and is connected. */
|
|
|
|
NETIF_DRIVER_STATUS_DOWN = 0
|
|
NETIF_DRIVER_STATUS_UP = 1
|
|
|
|
netif_formats = {
|
|
'netif_be_connect_t':
|
|
(CMSG_NETIF_BE, CMSG_NETIF_BE_CONNECT),
|
|
|
|
'netif_be_create_t':
|
|
(CMSG_NETIF_BE, CMSG_NETIF_BE_CREATE),
|
|
|
|
'netif_be_disconnect_t':
|
|
(CMSG_NETIF_BE, CMSG_NETIF_BE_DISCONNECT),
|
|
|
|
'netif_be_destroy_t':
|
|
(CMSG_NETIF_BE, CMSG_NETIF_BE_DESTROY),
|
|
|
|
'netif_be_driver_status_changed_t':
|
|
(CMSG_NETIF_BE, CMSG_NETIF_BE_DRIVER_STATUS_CHANGED),
|
|
|
|
'netif_fe_driver_status_changed_t':
|
|
(CMSG_NETIF_FE, CMSG_NETIF_FE_DRIVER_STATUS_CHANGED),
|
|
|
|
'netif_fe_interface_connect_t':
|
|
(CMSG_NETIF_FE, CMSG_NETIF_FE_INTERFACE_CONNECT),
|
|
|
|
'netif_fe_interface_status_changed_t':
|
|
(CMSG_NETIF_FE, CMSG_NETIF_FE_INTERFACE_STATUS_CHANGED),
|
|
}
|
|
|
|
msg_formats.update(netif_formats)
|
|
|
|
#============================================================================
|
|
# Domain shutdown message types.
|
|
#============================================================================
|
|
|
|
CMSG_SHUTDOWN = 6
|
|
|
|
CMSG_SHUTDOWN_POWEROFF = 0
|
|
CMSG_SHUTDOWN_REBOOT = 1
|
|
CMSG_SHUTDOWN_SUSPEND = 2
|
|
|
|
STOPCODE_shutdown = 0
|
|
STOPCODE_reboot = 1
|
|
STOPCODE_suspend = 2
|
|
|
|
shutdown_formats = {
|
|
'shutdown_poweroff_t':
|
|
(CMSG_SHUTDOWN, CMSG_SHUTDOWN_POWEROFF),
|
|
|
|
'shutdown_reboot_t':
|
|
(CMSG_SHUTDOWN, CMSG_SHUTDOWN_REBOOT),
|
|
|
|
'shutdown_suspend_t':
|
|
(CMSG_SHUTDOWN, CMSG_SHUTDOWN_SUSPEND),
|
|
}
|
|
|
|
msg_formats.update(shutdown_formats)
|
|
|
|
#============================================================================
|
|
|
|
class Msg:
|
|
pass
|
|
|
|
_next_msgid = 0
|
|
|
|
def nextid():
|
|
global _next_msgid
|
|
return ++_next_msgid
|
|
|
|
def packMsg(ty, params):
|
|
"""Pack a message.
|
|
Any 'mac' parameter is passed in as an int[6] array and converted.
|
|
|
|
ty message type name
|
|
params message parameter dict
|
|
|
|
returns xu message
|
|
"""
|
|
msgid = nextid()
|
|
if DEBUG: print '>packMsg', msgid, ty, params
|
|
(major, minor) = msg_formats[ty]
|
|
args = {}
|
|
for (k, v) in params.items():
|
|
if k == 'mac':
|
|
for i in range(0, 6):
|
|
args['mac[%d]' % i] = v[i]
|
|
else:
|
|
args[k] = v
|
|
if DEBUG:
|
|
for (k, v) in args.items():
|
|
print 'packMsg>', k, v, type(v)
|
|
msg = xu.message(major, minor, msgid, args)
|
|
return msg
|
|
|
|
def unpackMsg(ty, msg):
|
|
"""Unpack a message.
|
|
Any mac addresses in the message are converted to int[6] array
|
|
in the return dict.
|
|
|
|
ty message type
|
|
msg xu message
|
|
|
|
returns parameter dict
|
|
"""
|
|
args = msg.get_payload()
|
|
mac = [0, 0, 0, 0, 0, 0]
|
|
macs = []
|
|
for (k, v) in args.items():
|
|
if k.startswith('mac['):
|
|
macs += k
|
|
i = int(k[4:5])
|
|
mac[i] = v
|
|
else:
|
|
pass
|
|
if macs:
|
|
args['mac'] = mac
|
|
for k in macs:
|
|
del args[k]
|
|
if DEBUG:
|
|
msgid = msg.get_header()['id']
|
|
print '<unpackMsg', msgid, ty, args
|
|
return args
|
|
|
|
def msgTypeName(ty, subty):
|
|
"""Convert a message type, subtype pair (ints) to a message type name (string).
|
|
|
|
ty integer message type
|
|
subty integer message subtype
|
|
|
|
returns message type name (or None)
|
|
"""
|
|
for (name, info) in msg_formats.items():
|
|
if info[0] == ty and info[1] == subty:
|
|
return name
|
|
return None
|
|
|