13 return time.strftime(format,time.localtime())
15 def modprobe(module, args = ""):
16 ret = os.system("/sbin/modprobe %s %s" % (module, args))
17 if os.WEXITSTATUS(ret) == 0:
18 globals()['loadedmodules'].write("%s\n" % module)
25 kernel = os.uname()[2]
29 if os.path.exists(kernel):
32 path = "/lib/modules/%s/modules.pcimap" % kernel
34 pcimap = pypcimap.PCIMap(path)
35 print now(),"pl_hwinit: loading applicable modules"
36 devices = pypci.get_devices()
40 globals()['loadedmodules'] = file('/tmp/loadedmodules', 'w')
41 for (slot, dev) in devices.iteritems():
42 modules = pcimap.get(dev)
43 base = (dev[4] & 0xff0000) >> 16
45 if base == 0x01 or base == 0x02:
46 # storage or network device, in that order
47 missing.append((slot, dev))
54 # FIXME: This needs improved logic in the case of multiple matching modules
55 for module in modules:
56 print now(),"pl_hwinit: found and loading module %s (%s)" % (module, slot)
59 if network_devices == 0:
60 print now(),"pl_hwinit: no supported network devices found!"
61 print now(),"pl_hwinit: the following devices were found, but have no driver:"
62 print now(),"pl_hwinit: ", "\npl_hwinit: ".join(missing)
64 # XXX: could check for storage devices too, but older kernels have a lot of that built-in
66 # sd_mod won't get loaded automatically
67 print now(),"pl_hwinit: loading sd_mod"
70 # load usb_storage to support node conf files on flash disks
71 print now(),"pl_hwinit: loading usb_storage"
72 modprobe("usb_storage")
74 print now(),"pl_hwinit: loading floppy device driver"
75 modprobe("floppy","floppy=0,allowed_drive_mask")
77 # always wait a bit between loading the usb drivers, and checking /sys/
78 # for usb devices (this isn't necessarily for waiting for mass storage files,
80 print now(),"pl_hwinit: waiting for usb system to initialize."
83 # sometimes, flash devices take a while to initialize. in fact, the kernel
84 # intentionally waits 5 seconds for a device to 'settle'. some take even longer
85 # to show up. if there are any mass storage devices on the system, try to
86 # delay until they come online, up to a max delay of 30s.
88 # the way this will be done is to look for files in /sys/devices that are named
89 # 'bInterfaceClass', these will be a list of the usb devices on the system, and
90 # their primary usb device interface class ids. The base directory these files
91 # exist in will be the full path to the /sys/device entry for that device.
92 # for each mass storage devices (they have an interface class value of 08),
93 # we wait for a new symbolic link named 'driver' to exist in that directory,
94 # indicating the kernel loaded a driver for that device.
96 # usb interface class id for mass storage
97 INTERFACE_CLASS_MASS_STORAGE = "08"
99 # how long to wait in seconds before continuing on if devices
101 MAX_USB_WAIT_TIME = 30
103 # low long in seconds to wait between checks
104 PER_CHECK_USB_WAIT_TIME = 5
107 # find out if the device identified by the /sys dir has a module
108 # loaded for it. check for a symlink in the dir named driver.
109 def does_device_dir_have_driver(device):
110 return os.path.exists(os.path.join(device, "driver"))
112 def filter_and_add(list, directory, files):
113 if ("bInterfaceClass" in files and
114 int(file(os.path.join(directory, "bInterfaceClass")).read(), 16) == INTERFACE_CLASS_MASS_STORAGE):
115 list.append(directory)
118 os.path.walk("/sys/devices", filter_and_add, wait_dev_list)
120 if len(wait_dev_list) > 0:
121 print now(),"pl_hwinit: found USB mass storage device(s). Attempting to wait"
122 print now(),"pl_hwinit: up to %d seconds for them to come online." % MAX_USB_WAIT_TIME
126 while total_wait_time < MAX_USB_WAIT_TIME:
127 total_wait_time += PER_CHECK_USB_WAIT_TIME
129 print now(),"pl_hwinit: waiting %d seconds." % PER_CHECK_USB_WAIT_TIME
130 time.sleep(PER_CHECK_USB_WAIT_TIME)
132 all_devices_online = True
133 for device in wait_dev_list:
134 if not does_device_dir_have_driver(device):
135 all_devices_online = False
137 if all_devices_online:
139 print now(),"pl_hwinit: looks like the devices are now online."
142 print now(),"pl_hwinit: not all devices online yet, waiting..."
145 print now(),"pl_hwinit: Succesfully waited for USB mass storage devices"
146 print now(),"pl_hwinit: to come online."
148 print now(),"pl_hwinit: One or more USB mass storage devices did not"
149 print now(),"pl_hwinit: initialize in time. Continuing anyway."
151 if __name__ == "__main__":