hw/9pfs: Improve portability to older systems

[qemu.git] / qapi-schema-guest.json

# *-*- Mode: Python -*-*

##
# @guest-sync:
#
# Echo back a unique integer value
#
# This is used by clients talking to the guest agent over the
# wire to ensure the stream is in sync and doesn't contain stale
# data from previous client. All guest agent responses should be
# ignored until the provided unique integer value is returned,
# and it is up to the client to handle stale whole or
# partially-delivered JSON text in such a way that this response
# can be obtained.
#
# Such clients should also preceed this command
# with a 0xFF byte to make such the guest agent flushes any
# partially read JSON data from a previous session.
#
# @id: randomly generated 64-bit integer
#
# Returns: The unique integer id passed in by the client
#
# Since: 0.15.0
##
{ 'command': 'guest-sync'
  'data':    { 'id': 'int' },
  'returns': 'int' }

##
# @guest-ping:
#
# Ping the guest agent, a non-error return implies success
#
# Since: 0.15.0
##
{ 'command': 'guest-ping' }

##
# @guest-info:
#
# Get some information about the guest agent.
#
# Since: 0.15.0
##
{ 'type': 'GuestAgentInfo', 'data': {'version': 'str'} }
{ 'command': 'guest-info',
  'returns': 'GuestAgentInfo' }

##
# @guest-shutdown:
#
# Initiate guest-activated shutdown. Note: this is an asynchronous
# shutdown request, with no guaruntee of successful shutdown. Errors
# will be logged to guest's syslog.
#
# @mode: #optional "halt", "powerdown" (default), or "reboot"
#
# Returns: Nothing on success
#
# Since: 0.15.0
##
{ 'command': 'guest-shutdown', 'data': { '*mode': 'str' } }

##
# @guest-file-open:
#
# Open a file in the guest and retrieve a file handle for it
#
# @filepath: Full path to the file in the guest to open.
#
# @mode: #optional open mode, as per fopen(), "r" is the default.
#
# Returns: Guest file handle on success.
#
# Since: 0.15.0
##
{ 'command': 'guest-file-open',
  'data':    { 'path': 'str', '*mode': 'str' },
  'returns': 'int' }

##
# @guest-file-close:
#
# Close an open file in the guest
#
# @handle: filehandle returned by guest-file-open
#
# Returns: Nothing on success.
#
# Since: 0.15.0
##
{ 'command': 'guest-file-close',
  'data': { 'handle': 'int' } }

##
# @guest-file-read:
#
# Read from an open file in the guest. Data will be base64-encoded
#
# @handle: filehandle returned by guest-file-open
#
# @count: #optional maximum number of bytes to read (default is 4KB)
#
# Returns: GuestFileRead on success. Note: count is number of bytes read
#          *before* base64 encoding bytes read.
#
# Since: 0.15.0
##
{ 'type': 'GuestFileRead',
  'data': { 'count': 'int', 'buf-b64': 'str', 'eof': 'bool' } }

{ 'command': 'guest-file-read',
  'data':    { 'handle': 'int', '*count': 'int' },
  'returns': 'GuestFileRead' }

##
# @guest-file-write:
#
# Write to an open file in the guest.
#
# @handle: filehandle returned by guest-file-open
#
# @buf-b64: base64-encoded string representing data to be written
#
# @count: #optional bytes to write (actual bytes, after base64-decode),
#         default is all content in buf-b64 buffer after base64 decoding
#
# Returns: GuestFileWrite on success. Note: count is the number of bytes
#          base64-decoded bytes written
#
# Since: 0.15.0
##
{ 'type': 'GuestFileWrite',
  'data': { 'count': 'int', 'eof': 'bool' } }
{ 'command': 'guest-file-write',
  'data':    { 'handle': 'int', 'buf-b64': 'str', '*count': 'int' },
  'returns': 'GuestFileWrite' }

##
# @guest-file-seek:
#
# Seek to a position in the file, as with fseek(), and return the
# current file position afterward. Also encapsulates ftell()'s
# functionality, just Set offset=0, whence=SEEK_CUR.
#
# @handle: filehandle returned by guest-file-open
#
# @offset: bytes to skip over in the file stream
#
# @whence: SEEK_SET, SEEK_CUR, or SEEK_END, as with fseek()
#
# Returns: GuestFileSeek on success.
#
# Since: 0.15.0
##
{ 'type': 'GuestFileSeek',
  'data': { 'position': 'int', 'eof': 'bool' } }

{ 'command': 'guest-file-seek',
  'data':    { 'handle': 'int', 'offset': 'int', 'whence': 'int' },
  'returns': 'GuestFileSeek' }

##
# @guest-file-flush:
#
# Write file changes bufferred in userspace to disk/kernel buffers
#
# @handle: filehandle returned by guest-file-open
#
# Returns: Nothing on success.
#
# Since: 0.15.0
##
{ 'command': 'guest-file-flush',
  'data': { 'handle': 'int' } }

##
# @guest-fsfreeze-status:
#
# Get guest fsfreeze state. error state indicates failure to thaw 1 or more
# previously frozen filesystems, or failure to open a previously cached
# filesytem (filesystem unmounted/directory changes, etc).
#
# Returns: GuestFsfreezeStatus ("thawed", "frozen", etc., as defined below)
#
# Since: 0.15.0
##
{ 'enum': 'GuestFsfreezeStatus',
  'data': [ 'thawed', 'frozen', 'error' ] }
{ 'command': 'guest-fsfreeze-status',
  'returns': 'GuestFsfreezeStatus' }

##
# @guest-fsfreeze-freeze:
#
# Sync and freeze all non-network guest filesystems
#
# Returns: Number of file systems frozen on success
#
# Since: 0.15.0
##
{ 'command': 'guest-fsfreeze-freeze',
  'returns': 'int' }

##
# @guest-fsfreeze-thaw:
#
# Unfreeze frozen guest fileystems
#
# Returns: Number of file systems thawed
#          If error, -1 (unknown error) or -errno
#
# Since: 0.15.0
##
{ 'command': 'guest-fsfreeze-thaw',
  'returns': 'int' }