[OE-core] [PATCH 13/35] wic: Remove unused fs_related code
Tom Zanussi
tom.zanussi at linux.intel.com
Fri Aug 8 22:05:38 UTC 2014
wic doesn't use it, so remove it.
Signed-off-by: Tom Zanussi <tom.zanussi at linux.intel.com>
---
scripts/lib/mic/utils/fs_related.py | 930 ------------------------------------
1 file changed, 930 deletions(-)
diff --git a/scripts/lib/mic/utils/fs_related.py b/scripts/lib/mic/utils/fs_related.py
index 182171f..e6e362d 100644
--- a/scripts/lib/mic/utils/fs_related.py
+++ b/scripts/lib/mic/utils/fs_related.py
@@ -31,19 +31,6 @@ from mic.utils import runner
from mic.utils.errors import *
from mic.utils.oe.misc import *
-def find_binary_inchroot(binary, chroot):
- paths = ["/usr/sbin",
- "/usr/bin",
- "/sbin",
- "/bin"
- ]
-
- for path in paths:
- bin_path = "%s/%s" % (path, binary)
- if os.path.exists("%s/%s" % (chroot, bin_path)):
- return bin_path
- return None
-
def find_binary_path(binary):
if os.environ.has_key("PATH"):
paths = os.environ["PATH"].split(":")
@@ -72,176 +59,6 @@ def makedirs(dirname):
if err.errno != errno.EEXIST:
raise
-def mksquashfs(in_img, out_img):
- fullpathmksquashfs = find_binary_path("mksquashfs")
- args = [fullpathmksquashfs, in_img, out_img]
-
- if not sys.stdout.isatty():
- args.append("-no-progress")
-
- ret = runner.show(args)
- if ret != 0:
- raise SquashfsError("'%s' exited with error (%d)" % (' '.join(args), ret))
-
-def resize2fs(fs, size):
- resize2fs = find_binary_path("resize2fs")
- if size == 0:
- # it means to minimalize it
- return runner.show([resize2fs, '-M', fs])
- else:
- return runner.show([resize2fs, fs, "%sK" % (size / 1024,)])
-
-def my_fuser(fp):
- fuser = find_binary_path("fuser")
- if not os.path.exists(fp):
- return False
-
- rc = runner.quiet([fuser, "-s", fp])
- if rc == 0:
- for pid in runner.outs([fuser, fp]).split():
- fd = open("/proc/%s/cmdline" % pid, "r")
- cmdline = fd.read()
- fd.close()
- if cmdline[:-1] == "/bin/bash":
- return True
-
- # not found
- return False
-
-class BindChrootMount:
- """Represents a bind mount of a directory into a chroot."""
- def __init__(self, src, chroot, dest = None, option = None):
- self.root = os.path.abspath(os.path.expanduser(chroot))
- self.option = option
-
- self.orig_src = self.src = src
- if os.path.islink(src):
- self.src = os.readlink(src)
- if not self.src.startswith('/'):
- self.src = os.path.abspath(os.path.join(os.path.dirname(src),
- self.src))
-
- if not dest:
- dest = self.src
- self.dest = os.path.join(self.root, dest.lstrip('/'))
-
- self.mounted = False
- self.mountcmd = find_binary_path("mount")
- self.umountcmd = find_binary_path("umount")
-
- def ismounted(self):
- with open('/proc/mounts') as f:
- for line in f:
- if line.split()[1] == os.path.abspath(self.dest):
- return True
-
- return False
-
- def has_chroot_instance(self):
- lock = os.path.join(self.root, ".chroot.lock")
- return my_fuser(lock)
-
- def mount(self):
- if self.mounted or self.ismounted():
- return
-
- makedirs(self.dest)
- rc = runner.show([self.mountcmd, "--bind", self.src, self.dest])
- if rc != 0:
- raise MountError("Bind-mounting '%s' to '%s' failed" %
- (self.src, self.dest))
- if self.option:
- rc = runner.show([self.mountcmd, "--bind", "-o", "remount,%s" % self.option, self.dest])
- if rc != 0:
- raise MountError("Bind-remounting '%s' failed" % self.dest)
-
- self.mounted = True
- if os.path.islink(self.orig_src):
- dest = os.path.join(self.root, self.orig_src.lstrip('/'))
- if not os.path.exists(dest):
- os.symlink(self.src, dest)
-
- def unmount(self):
- if self.has_chroot_instance():
- return
-
- if self.ismounted():
- runner.show([self.umountcmd, "-l", self.dest])
- self.mounted = False
-
-class LoopbackMount:
- """LoopbackMount compatibility layer for old API"""
- def __init__(self, lofile, mountdir, fstype = None):
- self.diskmount = DiskMount(LoopbackDisk(lofile,size = 0),mountdir,fstype,rmmountdir = True)
- self.losetup = False
- self.losetupcmd = find_binary_path("losetup")
-
- def cleanup(self):
- self.diskmount.cleanup()
-
- def unmount(self):
- self.diskmount.unmount()
-
- def lounsetup(self):
- if self.losetup:
- runner.show([self.losetupcmd, "-d", self.loopdev])
- self.losetup = False
- self.loopdev = None
-
- def loopsetup(self):
- if self.losetup:
- return
-
- self.loopdev = get_loop_device(self.losetupcmd, self.lofile)
- self.losetup = True
-
- def mount(self):
- self.diskmount.mount()
-
-class SparseLoopbackMount(LoopbackMount):
- """SparseLoopbackMount compatibility layer for old API"""
- def __init__(self, lofile, mountdir, size, fstype = None):
- self.diskmount = DiskMount(SparseLoopbackDisk(lofile,size),mountdir,fstype,rmmountdir = True)
-
- def expand(self, create = False, size = None):
- self.diskmount.disk.expand(create, size)
-
- def truncate(self, size = None):
- self.diskmount.disk.truncate(size)
-
- def create(self):
- self.diskmount.disk.create()
-
-class SparseExtLoopbackMount(SparseLoopbackMount):
- """SparseExtLoopbackMount compatibility layer for old API"""
- def __init__(self, lofile, mountdir, size, fstype, blocksize, fslabel):
- self.diskmount = ExtDiskMount(SparseLoopbackDisk(lofile,size), mountdir, fstype, blocksize, fslabel, rmmountdir = True)
-
-
- def __format_filesystem(self):
- self.diskmount.__format_filesystem()
-
- def create(self):
- self.diskmount.disk.create()
-
- def resize(self, size = None):
- return self.diskmount.__resize_filesystem(size)
-
- def mount(self):
- self.diskmount.mount()
-
- def __fsck(self):
- self.extdiskmount.__fsck()
-
- def __get_size_from_filesystem(self):
- return self.diskmount.__get_size_from_filesystem()
-
- def __resize_to_minimal(self):
- return self.diskmount.__resize_to_minimal()
-
- def resparse(self, size = None):
- return self.diskmount.resparse(size)
-
class Disk:
"""Generic base object for a disk
@@ -270,20 +87,6 @@ class Disk:
size = property(get_size)
-class RawDisk(Disk):
- """A Disk backed by a block device.
- Note that create() is a no-op.
- """
- def __init__(self, size, device):
- Disk.__init__(self, size, device)
-
- def fixed(self):
- return True
-
- def exists(self):
- return True
-
-
class DiskImage(Disk):
"""
A Disk backed by a file.
@@ -311,76 +114,6 @@ class DiskImage(Disk):
self.device = self.image_file
-class LoopbackDisk(Disk):
- """A Disk backed by a file via the loop module."""
- def __init__(self, lofile, size):
- Disk.__init__(self, size)
- self.lofile = lofile
- self.losetupcmd = find_binary_path("losetup")
-
- def fixed(self):
- return False
-
- def exists(self):
- return os.path.exists(self.lofile)
-
- def create(self):
- if self.device is not None:
- return
-
- self.device = get_loop_device(self.losetupcmd, self.lofile)
-
- def cleanup(self):
- if self.device is None:
- return
- msger.debug("Losetup remove %s" % self.device)
- rc = runner.show([self.losetupcmd, "-d", self.device])
- self.device = None
-
-class SparseLoopbackDisk(LoopbackDisk):
- """A Disk backed by a sparse file via the loop module."""
- def __init__(self, lofile, size):
- LoopbackDisk.__init__(self, lofile, size)
-
- def expand(self, create = False, size = None):
- flags = os.O_WRONLY
- if create:
- flags |= os.O_CREAT
- if not os.path.exists(self.lofile):
- makedirs(os.path.dirname(self.lofile))
-
- if size is None:
- size = self.size
-
- msger.debug("Extending sparse file %s to %d" % (self.lofile, size))
- if create:
- fd = os.open(self.lofile, flags, 0644)
- else:
- fd = os.open(self.lofile, flags)
-
- if size <= 0:
- size = 1
- try:
- os.ftruncate(fd, size)
- except:
- # may be limited by 2G in 32bit env
- os.ftruncate(fd, 2**31L)
-
- os.close(fd)
-
- def truncate(self, size = None):
- if size is None:
- size = self.size
-
- msger.debug("Truncating sparse file %s to %d" % (self.lofile, size))
- fd = os.open(self.lofile, os.O_WRONLY)
- os.ftruncate(fd, size)
- os.close(fd)
-
- def create(self):
- self.expand(create = True)
- LoopbackDisk.create(self)
-
class Mount:
"""A generic base class to deal with mounting things."""
def __init__(self, mountdir):
@@ -395,666 +128,3 @@ class Mount:
def unmount(self):
pass
-class DiskMount(Mount):
- """A Mount object that handles mounting of a Disk."""
- def __init__(self, disk, mountdir, fstype = None, rmmountdir = True):
- Mount.__init__(self, mountdir)
-
- self.disk = disk
- self.fstype = fstype
- self.rmmountdir = rmmountdir
-
- self.mounted = False
- self.rmdir = False
- if fstype:
- self.mkfscmd = find_binary_path("mkfs." + self.fstype)
- else:
- self.mkfscmd = None
- self.mountcmd = find_binary_path("mount")
- self.umountcmd = find_binary_path("umount")
-
- def cleanup(self):
- Mount.cleanup(self)
- self.disk.cleanup()
-
- def unmount(self):
- if self.mounted:
- msger.debug("Unmounting directory %s" % self.mountdir)
- runner.quiet('sync') # sync the data on this mount point
- rc = runner.show([self.umountcmd, "-l", self.mountdir])
- if rc == 0:
- self.mounted = False
- else:
- raise MountError("Failed to umount %s" % self.mountdir)
- if self.rmdir and not self.mounted:
- try:
- os.rmdir(self.mountdir)
- except OSError, e:
- pass
- self.rmdir = False
-
-
- def __create(self):
- self.disk.create()
-
-
- def mount(self, options = None):
- if self.mounted:
- return
-
- if not os.path.isdir(self.mountdir):
- msger.debug("Creating mount point %s" % self.mountdir)
- os.makedirs(self.mountdir)
- self.rmdir = self.rmmountdir
-
- self.__create()
-
- msger.debug("Mounting %s at %s" % (self.disk.device, self.mountdir))
- if options:
- args = [ self.mountcmd, "-o", options, self.disk.device, self.mountdir ]
- else:
- args = [ self.mountcmd, self.disk.device, self.mountdir ]
- if self.fstype:
- args.extend(["-t", self.fstype])
-
- rc = runner.show(args)
- if rc != 0:
- raise MountError("Failed to mount '%s' to '%s' with command '%s'. Retval: %s" %
- (self.disk.device, self.mountdir, " ".join(args), rc))
-
- self.mounted = True
-
-class ExtDiskMount(DiskMount):
- """A DiskMount object that is able to format/resize ext[23] filesystems."""
- def __init__(self, disk, mountdir, fstype, blocksize, fslabel, rmmountdir=True, skipformat = False, fsopts = None):
- DiskMount.__init__(self, disk, mountdir, fstype, rmmountdir)
- self.blocksize = blocksize
- self.fslabel = fslabel.replace("/", "")
- self.uuid = str(uuid.uuid4())
- self.skipformat = skipformat
- self.fsopts = fsopts
- self.extopts = None
- self.dumpe2fs = find_binary_path("dumpe2fs")
- self.tune2fs = find_binary_path("tune2fs")
-
- def __parse_field(self, output, field):
- for line in output.split("\n"):
- if line.startswith(field + ":"):
- return line[len(field) + 1:].strip()
-
- raise KeyError("Failed to find field '%s' in output" % field)
-
- def __format_filesystem(self):
- if self.skipformat:
- msger.debug("Skip filesystem format.")
- return
-
- msger.verbose("Formating %s filesystem on %s" % (self.fstype, self.disk.device))
- cmdlist = [self.mkfscmd, "-F", "-L", self.fslabel, "-m", "1", "-b",
- str(self.blocksize), "-U", self.uuid]
- if self.extopts:
- cmdlist.extend(self.extopts.split())
- cmdlist.extend([self.disk.device])
-
- rc, errout = runner.runtool(cmdlist, catch=2)
- if rc != 0:
- raise MountError("Error creating %s filesystem on disk %s:\n%s" %
- (self.fstype, self.disk.device, errout))
-
- if not self.extopts:
- msger.debug("Tuning filesystem on %s" % self.disk.device)
- runner.show([self.tune2fs, "-c0", "-i0", "-Odir_index", "-ouser_xattr,acl", self.disk.device])
-
- def __resize_filesystem(self, size = None):
- current_size = os.stat(self.disk.lofile)[stat.ST_SIZE]
-
- if size is None:
- size = self.disk.size
-
- if size == current_size:
- return
-
- if size > current_size:
- self.disk.expand(size)
-
- self.__fsck()
-
- resize2fs(self.disk.lofile, size)
- return size
-
- def __create(self):
- resize = False
- if not self.disk.fixed() and self.disk.exists():
- resize = True
-
- self.disk.create()
-
- if resize:
- self.__resize_filesystem()
- else:
- self.__format_filesystem()
-
- def mount(self, options = None):
- self.__create()
- DiskMount.mount(self, options)
-
- def __fsck(self):
- msger.info("Checking filesystem %s" % self.disk.lofile)
- runner.quiet(["/sbin/e2fsck", "-f", "-y", self.disk.lofile])
-
- def __get_size_from_filesystem(self):
- return int(self.__parse_field(runner.outs([self.dumpe2fs, '-h', self.disk.lofile]),
- "Block count")) * self.blocksize
-
- def __resize_to_minimal(self):
- self.__fsck()
-
- #
- # Use a binary search to find the minimal size
- # we can resize the image to
- #
- bot = 0
- top = self.__get_size_from_filesystem()
- while top != (bot + 1):
- t = bot + ((top - bot) / 2)
-
- if not resize2fs(self.disk.lofile, t):
- top = t
- else:
- bot = t
- return top
-
- def resparse(self, size = None):
- self.cleanup()
- if size == 0:
- minsize = 0
- else:
- minsize = self.__resize_to_minimal()
- self.disk.truncate(minsize)
-
- self.__resize_filesystem(size)
- return minsize
-
-class VfatDiskMount(DiskMount):
- """A DiskMount object that is able to format vfat/msdos filesystems."""
- def __init__(self, disk, mountdir, fstype, blocksize, fslabel, rmmountdir=True, skipformat = False, fsopts = None):
- DiskMount.__init__(self, disk, mountdir, fstype, rmmountdir)
- self.blocksize = blocksize
- self.fslabel = fslabel.replace("/", "")
- rand1 = random.randint(0, 2**16 - 1)
- rand2 = random.randint(0, 2**16 - 1)
- self.uuid = "%04X-%04X" % (rand1, rand2)
- self.skipformat = skipformat
- self.fsopts = fsopts
- self.fsckcmd = find_binary_path("fsck." + self.fstype)
-
- def __format_filesystem(self):
- if self.skipformat:
- msger.debug("Skip filesystem format.")
- return
-
- msger.verbose("Formating %s filesystem on %s" % (self.fstype, self.disk.device))
- rc = runner.show([self.mkfscmd, "-n", self.fslabel,
- "-i", self.uuid.replace("-", ""), self.disk.device])
- if rc != 0:
- raise MountError("Error creating %s filesystem on disk %s" % (self.fstype,self.disk.device))
-
- msger.verbose("Tuning filesystem on %s" % self.disk.device)
-
- def __resize_filesystem(self, size = None):
- current_size = os.stat(self.disk.lofile)[stat.ST_SIZE]
-
- if size is None:
- size = self.disk.size
-
- if size == current_size:
- return
-
- if size > current_size:
- self.disk.expand(size)
-
- self.__fsck()
-
- #resize2fs(self.disk.lofile, size)
- return size
-
- def __create(self):
- resize = False
- if not self.disk.fixed() and self.disk.exists():
- resize = True
-
- self.disk.create()
-
- if resize:
- self.__resize_filesystem()
- else:
- self.__format_filesystem()
-
- def mount(self, options = None):
- self.__create()
- DiskMount.mount(self, options)
-
- def __fsck(self):
- msger.debug("Checking filesystem %s" % self.disk.lofile)
- runner.show([self.fsckcmd, "-y", self.disk.lofile])
-
- def __get_size_from_filesystem(self):
- return self.disk.size
-
- def __resize_to_minimal(self):
- self.__fsck()
-
- #
- # Use a binary search to find the minimal size
- # we can resize the image to
- #
- bot = 0
- top = self.__get_size_from_filesystem()
- return top
-
- def resparse(self, size = None):
- self.cleanup()
- minsize = self.__resize_to_minimal()
- self.disk.truncate(minsize)
- self.__resize_filesystem(size)
- return minsize
-
-class BtrfsDiskMount(DiskMount):
- """A DiskMount object that is able to format/resize btrfs filesystems."""
- def __init__(self, disk, mountdir, fstype, blocksize, fslabel, rmmountdir=True, skipformat = False, fsopts = None):
- self.__check_btrfs()
- DiskMount.__init__(self, disk, mountdir, fstype, rmmountdir)
- self.blocksize = blocksize
- self.fslabel = fslabel.replace("/", "")
- self.uuid = None
- self.skipformat = skipformat
- self.fsopts = fsopts
- self.blkidcmd = find_binary_path("blkid")
- self.btrfsckcmd = find_binary_path("btrfsck")
-
- def __check_btrfs(self):
- found = False
- """ Need to load btrfs module to mount it """
- load_module("btrfs")
- for line in open("/proc/filesystems").xreadlines():
- if line.find("btrfs") > -1:
- found = True
- break
- if not found:
- raise MountError("Your system can't mount btrfs filesystem, please make sure your kernel has btrfs support and the module btrfs.ko has been loaded.")
-
- # disable selinux, selinux will block write
- if os.path.exists("/usr/sbin/setenforce"):
- runner.show(["/usr/sbin/setenforce", "0"])
-
- def __parse_field(self, output, field):
- for line in output.split(" "):
- if line.startswith(field + "="):
- return line[len(field) + 1:].strip().replace("\"", "")
-
- raise KeyError("Failed to find field '%s' in output" % field)
-
- def __format_filesystem(self):
- if self.skipformat:
- msger.debug("Skip filesystem format.")
- return
-
- msger.verbose("Formating %s filesystem on %s" % (self.fstype, self.disk.device))
- rc = runner.show([self.mkfscmd, "-L", self.fslabel, self.disk.device])
- if rc != 0:
- raise MountError("Error creating %s filesystem on disk %s" % (self.fstype,self.disk.device))
-
- self.uuid = self.__parse_field(runner.outs([self.blkidcmd, self.disk.device]), "UUID")
-
- def __resize_filesystem(self, size = None):
- current_size = os.stat(self.disk.lofile)[stat.ST_SIZE]
-
- if size is None:
- size = self.disk.size
-
- if size == current_size:
- return
-
- if size > current_size:
- self.disk.expand(size)
-
- self.__fsck()
- return size
-
- def __create(self):
- resize = False
- if not self.disk.fixed() and self.disk.exists():
- resize = True
-
- self.disk.create()
-
- if resize:
- self.__resize_filesystem()
- else:
- self.__format_filesystem()
-
- def mount(self, options = None):
- self.__create()
- DiskMount.mount(self, options)
-
- def __fsck(self):
- msger.debug("Checking filesystem %s" % self.disk.lofile)
- runner.quiet([self.btrfsckcmd, self.disk.lofile])
-
- def __get_size_from_filesystem(self):
- return self.disk.size
-
- def __resize_to_minimal(self):
- self.__fsck()
-
- return self.__get_size_from_filesystem()
-
- def resparse(self, size = None):
- self.cleanup()
- minsize = self.__resize_to_minimal()
- self.disk.truncate(minsize)
- self.__resize_filesystem(size)
- return minsize
-
-class DeviceMapperSnapshot(object):
- def __init__(self, imgloop, cowloop):
- self.imgloop = imgloop
- self.cowloop = cowloop
-
- self.__created = False
- self.__name = None
- self.dmsetupcmd = find_binary_path("dmsetup")
-
- """Load dm_snapshot if it isn't loaded"""
- load_module("dm_snapshot")
-
- def get_path(self):
- if self.__name is None:
- return None
- return os.path.join("/dev/mapper", self.__name)
- path = property(get_path)
-
- def create(self):
- if self.__created:
- return
-
- self.imgloop.create()
- self.cowloop.create()
-
- self.__name = "imgcreate-%d-%d" % (os.getpid(),
- random.randint(0, 2**16))
-
- size = os.stat(self.imgloop.lofile)[stat.ST_SIZE]
-
- table = "0 %d snapshot %s %s p 8" % (size / 512,
- self.imgloop.device,
- self.cowloop.device)
-
- args = [self.dmsetupcmd, "create", self.__name, "--table", table]
- if runner.show(args) != 0:
- self.cowloop.cleanup()
- self.imgloop.cleanup()
- raise SnapshotError("Could not create snapshot device using: " + ' '.join(args))
-
- self.__created = True
-
- def remove(self, ignore_errors = False):
- if not self.__created:
- return
-
- time.sleep(2)
- rc = runner.show([self.dmsetupcmd, "remove", self.__name])
- if not ignore_errors and rc != 0:
- raise SnapshotError("Could not remove snapshot device")
-
- self.__name = None
- self.__created = False
-
- self.cowloop.cleanup()
- self.imgloop.cleanup()
-
- def get_cow_used(self):
- if not self.__created:
- return 0
-
- #
- # dmsetup status on a snapshot returns e.g.
- # "0 8388608 snapshot 416/1048576"
- # or, more generally:
- # "A B snapshot C/D"
- # where C is the number of 512 byte sectors in use
- #
- out = runner.outs([self.dmsetupcmd, "status", self.__name])
- try:
- return int((out.split()[3]).split('/')[0]) * 512
- except ValueError:
- raise SnapshotError("Failed to parse dmsetup status: " + out)
-
-def create_image_minimizer(path, image, minimal_size):
- """
- Builds a copy-on-write image which can be used to
- create a device-mapper snapshot of an image where
- the image's filesystem is as small as possible
-
- The steps taken are:
- 1) Create a sparse COW
- 2) Loopback mount the image and the COW
- 3) Create a device-mapper snapshot of the image
- using the COW
- 4) Resize the filesystem to the minimal size
- 5) Determine the amount of space used in the COW
- 6) Restroy the device-mapper snapshot
- 7) Truncate the COW, removing unused space
- 8) Create a squashfs of the COW
- """
- imgloop = LoopbackDisk(image, None) # Passing bogus size - doesn't matter
-
- cowloop = SparseLoopbackDisk(os.path.join(os.path.dirname(path), "osmin"),
- 64L * 1024L * 1024L)
-
- snapshot = DeviceMapperSnapshot(imgloop, cowloop)
-
- try:
- snapshot.create()
-
- resize2fs(snapshot.path, minimal_size)
-
- cow_used = snapshot.get_cow_used()
- finally:
- snapshot.remove(ignore_errors = (not sys.exc_info()[0] is None))
-
- cowloop.truncate(cow_used)
-
- mksquashfs(cowloop.lofile, path)
-
- os.unlink(cowloop.lofile)
-
-def load_module(module):
- found = False
- for line in open('/proc/modules').xreadlines():
- if line.startswith("%s " % module):
- found = True
- break
- if not found:
- msger.info("Loading %s..." % module)
- runner.quiet(['modprobe', module])
-
-class LoopDevice(object):
- def __init__(self, loopid=None):
- self.device = None
- self.loopid = loopid
- self.created = False
- self.kpartxcmd = find_binary_path("kpartx")
- self.losetupcmd = find_binary_path("losetup")
-
- def register(self, device):
- self.device = device
- self.loopid = None
- self.created = True
-
- def reg_atexit(self):
- import atexit
- atexit.register(self.close)
-
- def _genloopid(self):
- import glob
- if not glob.glob("/dev/loop[0-9]*"):
- return 10
-
- fint = lambda x: x[9:].isdigit() and int(x[9:]) or 0
- maxid = 1 + max(filter(lambda x: x<100,
- map(fint, glob.glob("/dev/loop[0-9]*"))))
- if maxid < 10: maxid = 10
- if maxid >= 100: raise
- return maxid
-
- def _kpseek(self, device):
- rc, out = runner.runtool([self.kpartxcmd, '-l', '-v', device])
- if rc != 0:
- raise MountError("Can't query dm snapshot on %s" % device)
- for line in out.splitlines():
- if line and line.startswith("loop"):
- return True
- return False
-
- def _loseek(self, device):
- import re
- rc, out = runner.runtool([self.losetupcmd, '-a'])
- if rc != 0:
- raise MountError("Failed to run 'losetup -a'")
- for line in out.splitlines():
- m = re.match("([^:]+): .*", line)
- if m and m.group(1) == device:
- return True
- return False
-
- def create(self):
- if not self.created:
- if not self.loopid:
- self.loopid = self._genloopid()
- self.device = "/dev/loop%d" % self.loopid
- if os.path.exists(self.device):
- if self._loseek(self.device):
- raise MountError("Device busy: %s" % self.device)
- else:
- self.created = True
- return
-
- mknod = find_binary_path('mknod')
- rc = runner.show([mknod, '-m664', self.device, 'b', '7', str(self.loopid)])
- if rc != 0:
- raise MountError("Failed to create device %s" % self.device)
- else:
- self.created = True
-
- def close(self):
- if self.created:
- try:
- self.cleanup()
- self.device = None
- except MountError, e:
- msger.error("%s" % e)
-
- def cleanup(self):
-
- if self.device is None:
- return
-
-
- if self._kpseek(self.device):
- if self.created:
- for i in range(3, os.sysconf("SC_OPEN_MAX")):
- try:
- os.close(i)
- except:
- pass
- runner.quiet([self.kpartxcmd, "-d", self.device])
- if self._loseek(self.device):
- runner.quiet([self.losetupcmd, "-d", self.device])
- # FIXME: should sleep a while between two loseek
- if self._loseek(self.device):
- msger.warning("Can't cleanup loop device %s" % self.device)
- elif self.loopid:
- os.unlink(self.device)
-
-DEVICE_PIDFILE_DIR = "/var/tmp/mic/device"
-DEVICE_LOCKFILE = "/var/lock/__mic_loopdev.lock"
-
-def get_loop_device(losetupcmd, lofile):
- global DEVICE_PIDFILE_DIR
- global DEVICE_LOCKFILE
-
- import fcntl
- makedirs(os.path.dirname(DEVICE_LOCKFILE))
- fp = open(DEVICE_LOCKFILE, 'w')
- fcntl.flock(fp, fcntl.LOCK_EX)
- try:
- loopdev = None
- devinst = LoopDevice()
-
- # clean up left loop device first
- clean_loop_devices()
-
- # provide an avaible loop device
- rc, out = runner.runtool([losetupcmd, "--find"])
- if rc == 0:
- loopdev = out.split()[0]
- devinst.register(loopdev)
- if not loopdev or not os.path.exists(loopdev):
- devinst.create()
- loopdev = devinst.device
-
- # setup a loop device for image file
- rc = runner.show([losetupcmd, loopdev, lofile])
- if rc != 0:
- raise MountError("Failed to setup loop device for '%s'" % lofile)
-
- devinst.reg_atexit()
-
- # try to save device and pid
- makedirs(DEVICE_PIDFILE_DIR)
- pidfile = os.path.join(DEVICE_PIDFILE_DIR, os.path.basename(loopdev))
- if os.path.exists(pidfile):
- os.unlink(pidfile)
- with open(pidfile, 'w') as wf:
- wf.write(str(os.getpid()))
-
- except MountError, err:
- raise CreatorError("%s" % str(err))
- except:
- raise
- finally:
- try:
- fcntl.flock(fp, fcntl.LOCK_UN)
- fp.close()
- os.unlink(DEVICE_LOCKFILE)
- except:
- pass
-
- return loopdev
-
-def clean_loop_devices(piddir=DEVICE_PIDFILE_DIR):
- if not os.path.exists(piddir) or not os.path.isdir(piddir):
- return
-
- for loopdev in os.listdir(piddir):
- pidfile = os.path.join(piddir, loopdev)
- try:
- with open(pidfile, 'r') as rf:
- devpid = int(rf.read())
- except:
- devpid = None
-
- # if the process using this device is alive, skip it
- if not devpid or os.path.exists(os.path.join('/proc', str(devpid))):
- continue
-
- # try to clean it up
- try:
- devinst = LoopDevice()
- devinst.register(os.path.join('/dev', loopdev))
- devinst.cleanup()
- os.unlink(pidfile)
- except:
- pass
-
--
1.8.3.1
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