def is_target_enabled(target, driver):
fn = '%s/targets/%s/%s/enabled' % (SCST_SYS_PATH, driver, target)
if os.path.exists(fn):
ret = fread(fn)
ret.rstrip("\n")
return bool(int(ret))
return False
def get_disk_size(path):
'''
This function returns the size in bytes of a disk-type
block device, or None if path does not point to a disk-
type device.
'''
(major, minor) = get_block_numbers(path)
if major is None:
return None
# list of [major, minor, #blocks (1K), name
partitions = [x.split()[0:4]
for x in fread("/proc/partitions").split("\n")[2:] if x]
size = None
for partition in partitions:
if partition[0:2] == [str(major), str(minor)]:
size = int(partition[2]) * 1024
break
return size
def get_block_type(path):
'''
This function returns a block device's type.
Example: 0 is TYPE_DISK
If no match is found, None is returned.
>>> from rtslib.utils import *
>>> get_block_type("/dev/sda")
0
>>> get_block_type("/dev/sr0")
5
>>> get_block_type("/dev/scd0")
5
>>> get_block_type("/dev/nodevicehere") is None
True
@param path: path to the block device
@type path: string
@return: An int for the block device type, or None if not a block device.
'''
dev = os.path.realpath(path)
# TODO: Make adding new majors on-the-fly possible, using some config file
# for instance, maybe an additionnal list argument, or even a match all
# mode for overrides ?
# Make sure we are dealing with a block device
(major, minor) = get_block_numbers(dev)
if major is None:
return None
# Treat disk partitions as TYPE_DISK
if is_disk_partition(path):
return 0
# These devices are disk type block devices, but might not report this
# correctly in /sys/block/xxx/device/type, so use their major number.
type_disk_known_majors = [1, # RAM disk
8, # SCSI disk devices
9, # Metadisk RAID devices
13, # 8-bit MFM/RLL/IDE controller
19, # "Double" compressed disk
21, # Acorn MFM hard drive interface
30, # FIXME: Normally 'Philips LMS CM-205
# CD-ROM' in the Linux devices list but
# used by Cirtas devices.
35, # Slow memory ramdisk
36, # MCA ESDI hard disk
37, # Zorro II ramdisk
43, # Network block devices
44, # Flash Translation Layer (FTL) filesystems
45, # Parallel port IDE disk devices
47, # Parallel port ATAPI disk devices
48, # Mylex DAC960 PCI RAID controller
48, # Mylex DAC960 PCI RAID controller
49, # Mylex DAC960 PCI RAID controller
50, # Mylex DAC960 PCI RAID controller
51, # Mylex DAC960 PCI RAID controller
52, # Mylex DAC960 PCI RAID controller
53, # Mylex DAC960 PCI RAID controller
54, # Mylex DAC960 PCI RAID controller
55, # Mylex DAC960 PCI RAID controller
58, # Reserved for logical volume manager
59, # Generic PDA filesystem device
60, # LOCAL/EXPERIMENTAL USE
61, # LOCAL/EXPERIMENTAL USE
62, # LOCAL/EXPERIMENTAL USE
63, # LOCAL/EXPERIMENTAL USE
64, # Scramdisk/DriveCrypt encrypted devices
65, # SCSI disk devices (16-31)
66, # SCSI disk devices (32-47)
67, # SCSI disk devices (48-63)
68, # SCSI disk devices (64-79)
69, # SCSI disk devices (80-95)
70, # SCSI disk devices (96-111)
71, # SCSI disk devices (112-127)
72, # Compaq Intelligent Drive Array
73, # Compaq Intelligent Drive Array
74, # Compaq Intelligent Drive Array
75, # Compaq Intelligent Drive Array
76, # Compaq Intelligent Drive Array
77, # Compaq Intelligent Drive Array
78, # Compaq Intelligent Drive Array
79, # Compaq Intelligent Drive Array
80, # I2O hard disk
80, # I2O hard disk
81, # I2O hard disk
82, # I2O hard disk
83, # I2O hard disk
84, # I2O hard disk
85, # I2O hard disk
86, # I2O hard disk
87, # I2O hard disk
93, # NAND Flash Translation Layer filesystem
94, # IBM S/390 DASD block storage
96, # Inverse NAND Flash Translation Layer
98, # User-mode virtual block device
99, # JavaStation flash disk
101, # AMI HyperDisk RAID controller
102, # Compressed block device
104, # Compaq Next Generation Drive Array
105, # Compaq Next Generation Drive Array
106, # Compaq Next Generation Drive Array
107, # Compaq Next Generation Drive Array
108, # Compaq Next Generation Drive Array
109, # Compaq Next Generation Drive Array
110, # Compaq Next Generation Drive Array
111, # Compaq Next Generation Drive Array
112, # IBM iSeries virtual disk
114, # IDE BIOS powered software RAID interfaces
115, # NetWare (NWFS) Devices (0-255)
117, # Enterprise Volume Management System
120, # LOCAL/EXPERIMENTAL USE
121, # LOCAL/EXPERIMENTAL USE
122, # LOCAL/EXPERIMENTAL USE
123, # LOCAL/EXPERIMENTAL USE
124, # LOCAL/EXPERIMENTAL USE
125, # LOCAL/EXPERIMENTAL USE
126, # LOCAL/EXPERIMENTAL USE
127, # LOCAL/EXPERIMENTAL USE
128, # SCSI disk devices (128-143)
129, # SCSI disk devices (144-159)
130, # SCSI disk devices (160-175)
131, # SCSI disk devices (176-191)
132, # SCSI disk devices (192-207)
133, # SCSI disk devices (208-223)
134, # SCSI disk devices (224-239)
135, # SCSI disk devices (240-255)
136, # Mylex DAC960 PCI RAID controller
137, # Mylex DAC960 PCI RAID controller
138, # Mylex DAC960 PCI RAID controller
139, # Mylex DAC960 PCI RAID controller
140, # Mylex DAC960 PCI RAID controller
141, # Mylex DAC960 PCI RAID controller
142, # Mylex DAC960 PCI RAID controller
143, # Mylex DAC960 PCI RAID controller
144, # Non-device (e.g. NFS) mounts
145, # Non-device (e.g. NFS) mounts
146, # Non-device (e.g. NFS) mounts
147, # DRBD device
152, # EtherDrive Block Devices
153, # Enhanced Metadisk RAID storage units
160, # Carmel 8-port SATA Disks
161, # Carmel 8-port SATA Disks
199, # Veritas volume manager (VxVM) volumes
201, # Veritas VxVM dynamic multipathing driver
230, # ZFS ZVols
240, # LOCAL/EXPERIMENTAL USE
241, # LOCAL/EXPERIMENTAL USE
242, # LOCAL/EXPERIMENTAL USE
243, # LOCAL/EXPERIMENTAL USE
244, # LOCAL/EXPERIMENTAL USE
245, # LOCAL/EXPERIMENTAL USE
246, # LOCAL/EXPERIMENTAL USE
247, # LOCAL/EXPERIMENTAL USE
248, # LOCAL/EXPERIMENTAL USE
249, # LOCAL/EXPERIMENTAL USE
250, # LOCAL/EXPERIMENTAL USE
251, # LOCAL/EXPERIMENTAL USE
252, # LOCAL/EXPERIMENTAL USE
253, # LOCAL/EXPERIMENTAL USE
254 # LOCAL/EXPERIMENTAL USE
]
if major in type_disk_known_majors:
return 0
# Same for LVM LVs, but as we cannot use major here
# (it varies accross distros), use the realpath to check
if os.path.dirname(dev) == "/dev/mapper":
return 0
# list of (major, minor, type) tuples
blocks = [(fread("%s/dev" % fdev).strip().split(':')[0],
fread("%s/dev" % fdev).strip().split(':')[1],
fread("%s/device/type" % fdev).strip())
for fdev in glob.glob("/sys/block/*")
if os.path.isfile("%s/device/type" % fdev)]
for block in blocks:
if int(block[0]) == major and int(block[1]) == minor:
return int(block[2])
return None
def is_driver_enabled(driver):
fn = '%s/targets/%s/enabled' % (SCST_SYS_PATH, driver)
if os.path.isfile(fn):
ret = fread(fn)
return bool(ret)
return False
