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dom0/qmemman: fork into background after daemon initialization (#635)

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Parse config and setup socket before fork.
This commit is contained in:
Marek Marczykowski 2012-07-20 16:32:17 +02:00
parent 273032bfae
commit c2d20e59d0
2 changed files with 27 additions and 12 deletions
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2
dom0/init.d/qubes_core
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@ -30,7 +30,7 @@ start()
xl sched-credit -d 0 -w 512 xl sched-credit -d 0 -w 512
cp /var/lib/qubes/qubes.xml /var/lib/qubes/backup/qubes-$(date +%F-%T).xml cp /var/lib/qubes/qubes.xml /var/lib/qubes/backup/qubes-$(date +%F-%T).xml
/usr/lib/qubes/qmemman_daemon.py >/var/log/qubes/qmemman.log 2>/var/log/qubes/qmemman.errs & /usr/lib/qubes/qmemman_daemon.py
MEM_CHANGE_THRESHOLD_KB=30000 MEM_CHANGE_THRESHOLD_KB=30000
MEMINFO_DELAY_USEC=100000 MEMINFO_DELAY_USEC=100000
/usr/lib/qubes/meminfo-writer $MEM_CHANGE_THRESHOLD_KB $MEMINFO_DELAY_USEC & /usr/lib/qubes/meminfo-writer $MEM_CHANGE_THRESHOLD_KB $MEMINFO_DELAY_USEC &

35
dom0/qmemman/qmemman_server.py
View File

@ -12,6 +12,8 @@ from optparse import OptionParser
from qubesutils import parse_size from qubesutils import parse_size
config_path = '/etc/qubes/qmemman.conf' config_path = '/etc/qubes/qmemman.conf'
SOCK_PATH='/var/run/qubes/qmemman.sock'
LOG_PATH='/var/log/qubes/qmemman.log'
system_state = SystemState() system_state = SystemState()
global_lock = thread.allocate_lock() global_lock = thread.allocate_lock()
@ -105,15 +107,7 @@ class QMemmanReqHandler(SocketServer.BaseRequestHandler):
self.request.send(resp) self.request.send(resp)
def start_server(): def start_server(server):
SOCK_PATH='/var/run/qubes/qmemman.sock'
try:
os.unlink(SOCK_PATH)
except:
pass
os.umask(0)
server = SocketServer.UnixStreamServer(SOCK_PATH, QMemmanReqHandler)
os.umask(077)
server.serve_forever() server.serve_forever()
class QMemmanServer: class QMemmanServer:
@ -124,6 +118,19 @@ class QMemmanServer:
parser.add_option("-c", "--config", action="store", dest="config", default=config_path) parser.add_option("-c", "--config", action="store", dest="config", default=config_path)
(options, args) = parser.parse_args() (options, args) = parser.parse_args()
logfd = os.open(LOG_PATH, os.O_WRONLY|os.O_APPEND|os.O_CREAT, 0644)
if logfd < 0:
print sys.stderr, "ERROR: Failed to open log file (%s)" % LOG_PATH
exit(1)
# reinitialize python stdout/err
sys.stdout.flush()
sys.stderr.flush()
os.dup2(logfd, 1)
os.dup2(logfd, 2)
os.close(logfd)
devnull = os.open('/dev/null', os.O_RDONLY)
os.dup2(devnull, 0)
config = SafeConfigParser({ config = SafeConfigParser({
'vm-min-mem': str(qmemman_algo.MIN_PREFMEM), 'vm-min-mem': str(qmemman_algo.MIN_PREFMEM),
'dom0-mem-boost': str(qmemman_algo.DOM0_MEM_BOOST), 'dom0-mem-boost': str(qmemman_algo.DOM0_MEM_BOOST),
@ -137,5 +144,13 @@ class QMemmanServer:
print "values: %s, %s, %s" % (str(qmemman_algo.MIN_PREFMEM), str(qmemman_algo.DOM0_MEM_BOOST), str(qmemman_algo.CACHE_FACTOR)) print "values: %s, %s, %s" % (str(qmemman_algo.MIN_PREFMEM), str(qmemman_algo.DOM0_MEM_BOOST), str(qmemman_algo.CACHE_FACTOR))
thread.start_new_thread(start_server, tuple([])) try:
os.unlink(SOCK_PATH)
except:
pass
os.umask(0)
server = SocketServer.UnixStreamServer(SOCK_PATH, QMemmanReqHandler)
os.umask(077)
if os.fork() == 0:
thread.start_new_thread(start_server, tuple([server]))
XS_Watcher().watch_loop() XS_Watcher().watch_loop()