#!/usr/bin/env python3 # Handle running OE images standalone with QEMU # # Copyright (C) 2006-2011 Linux Foundation # Copyright (c) 2016 Wind River Systems, Inc. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 as # published by the Free Software Foundation. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License along # with this program; if not, write to the Free Software Foundation, Inc., # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. import os import sys import logging import subprocess import re import fcntl import shutil import glob import configparser def create_logger(): logger = logging.getLogger('runqemu') logger.setLevel(logging.INFO) # create console handler and set level to debug ch = logging.StreamHandler() ch.setLevel(logging.INFO) # create formatter formatter = logging.Formatter('%(name)s - %(levelname)s - %(message)s') # add formatter to ch ch.setFormatter(formatter) # add ch to logger logger.addHandler(ch) return logger logger = create_logger() def print_usage(): print(""" Usage: you can run this script with any valid combination of the following environment variables (in any order): KERNEL - the kernel image file to use ROOTFS - the rootfs image file or nfsroot directory to use MACHINE - the machine name (optional, autodetected from KERNEL filename if unspecified) Simplified QEMU command-line options can be passed with: nographic - disable video console serial - enable a serial console on /dev/ttyS0 slirp - enable user networking, no root privileges is required kvm - enable KVM when running x86/x86_64 (VT-capable CPU required) kvm-vhost - enable KVM with vhost when running x86/x86_64 (VT-capable CPU required) publicvnc - enable a VNC server open to all hosts audio - enable audio tcpserial= - specify tcp serial port number biosdir= - specify custom bios dir biosfilename= - specify bios filename qemuparams= - specify custom parameters to QEMU bootparams= - specify custom kernel parameters during boot help: print this text Examples: runqemu qemuarm runqemu tmp/deploy/images/qemuarm runqemu tmp/deploy/images/qemux86/.qemuboot.conf runqemu qemux86-64 core-image-sato ext4 runqemu qemux86-64 wic-image-minimal wic runqemu path/to/bzImage-qemux86.bin path/to/nfsrootdir/ serial runqemu qemux86 iso/hddimg/vmdk/qcow2/vdi/ramfs/cpio.gz... runqemu qemux86 qemuparams="-m 256" runqemu qemux86 bootparams="psplash=false" runqemu path/to/-.vmdk runqemu path/to/-.wic """) def check_tun(): """Check /dev/net/run""" dev_tun = '/dev/net/tun' if not os.path.exists(dev_tun): raise Exception("TUN control device %s is unavailable; you may need to enable TUN (e.g. sudo modprobe tun)" % dev_tun) if not os.access(dev_tun, os.W_OK): raise Exception("TUN control device %s is not writable, please fix (e.g. sudo chmod 666 %s)" % (dev_tun, dev_tun)) def check_libgl(qemu_bin): cmd = 'ldd %s' % qemu_bin logger.info('Running %s...' % cmd) need_gl = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8') if re.search('libGLU', need_gl): # We can't run without a libGL.so libgl = False check_files = (('/usr/lib/libGL.so', '/usr/lib/libGLU.so'), \ ('/usr/lib64/libGL.so', '/usr/lib64/libGLU.so'), \ ('/usr/lib/*-linux-gnu/libGL.so', '/usr/lib/*-linux-gnu/libGLU.so')) for (f1, f2) in check_files: if re.search('\*', f1): for g1 in glob.glob(f1): if libgl: break if os.path.exists(g1): for g2 in glob.glob(f2): if os.path.exists(g2): libgl = True break if libgl: break else: if os.path.exists(f1) and os.path.exists(f2): libgl = True break if not libgl: logger.error("You need libGL.so and libGLU.so to exist in your library path to run the QEMU emulator.") logger.error("Ubuntu package names are: libgl1-mesa-dev and libglu1-mesa-dev.") logger.error("Fedora package names are: mesa-libGL-devel mesa-libGLU-devel.") raise Exception('%s requires libGLU, but not found' % qemu_bin) class BaseConfig(object): def __init__(self): # Vars can be merged with .qemuboot.conf, use a dict to manage them. self.d = { 'MACHINE': '', 'DEPLOY_DIR_IMAGE': '', 'QB_KERNEL_ROOT': '/dev/vda', } self.qemu_opt = '' self.qemu_opt_script = '' self.nfs_dir = '' self.clean_nfs_dir = False self.nfs_server = '' self.rootfs = '' self.qemuboot = '' self.qbconfload = False self.kernel = '' self.kernel_cmdline = '' self.kernel_cmdline_script = '' self.fstype = '' self.kvm_enabled = False self.vhost_enabled = False self.slirp_enabled = False self.nfs_instance = 0 self.nfs_running = False self.serialstdio = False self.cleantap = False self.saved_stty = '' self.audio_enabled = False self.tcpserial_portnum = '' self.custombiosdir = '' self.lock = '' self.lock_descriptor = '' self.bitbake_e = '' self.fstypes = ('ext2', 'ext3', 'ext4', 'jffs2', 'nfs', 'btrfs', 'cpio.gz', 'cpio', 'ramfs') self.vmtypes = ('hddimg', 'hdddirect', 'wic', 'vmdk', 'qcow2', 'vdi', 'iso') def acquire_lock(self): logger.info("Acquiring lockfile %s..." % self.lock) lock_descriptor = open(self.lock, 'w') try: fcntl.flock(lock_descriptor, fcntl.LOCK_EX|fcntl.LOCK_NB) except Exception as e: logger.info("Acquiring lockfile %s failed: %s" % (self.lock, e)) lock_descriptor.close() return False self.lock_descriptor = lock_descriptor return True def release_lock(self): fcntl.flock(self.lock_descriptor, fcntl.LOCK_UN) self.lock_descriptor.close() os.remove(self.lock) def get(self, key): if key in self.d: return self.d.get(key) else: return '' def set(self, key, value): self.d[key] = value def is_deploy_dir_image(self, p): if os.path.isdir(p): if not re.search('.qemuboot.conf$', '\n'.join(os.listdir(p)), re.M): logger.info("Can't find required qemuboot.conf in %s" % p) return False if not re.search('-image-', '\n'.join(os.listdir(p))): logger.info("Can't find *-image-* in %s" % p) return False return True else: return False def check_arg_fstype(self, fst): """Check and set FSTYPE""" if fst not in self.fstypes + self.vmtypes: logger.warn("Maybe unsupported FSTYPE: %s" % fst) if not self.fstype or self.fstype == fst: if fst == 'ramfs': fst = 'cpio.gz' self.fstype = fst else: raise Exception("Conflicting: FSTYPE %s and %s" % (self.fstype, fst)) def set_machine_deploy_dir(self, machine, deploy_dir_image): """Set MACHINE and DEPLOY_DIR_IMAGE""" logger.info('MACHINE: %s' % machine) self.set("MACHINE", machine) logger.info('DEPLOY_DIR_IMAGE: %s' % deploy_dir_image) self.set("DEPLOY_DIR_IMAGE", deploy_dir_image) def check_arg_nfs(self, p): if os.path.isdir(p): self.nfs_dir = p else: m = re.match('(.*):(.*)', p) self.nfs_server = m.group(1) self.nfs_dir = m.group(2) self.rootfs = "" self.check_arg_fstype('nfs') def check_arg_path(self, p): """ - Check whether it is .qemuboot.conf or contains .qemuboot.conf - Check whether is a kernel file - Check whether is a image file - Check whether it is a nfs dir """ if p.endswith('.qemuboot.conf'): self.qemuboot = p self.qbconfload = True elif re.search('\.bin$', p) or re.search('bzImage', p) or \ re.search('zImage', p) or re.search('vmlinux', p) or \ re.search('fitImage', p) or re.search('uImage', p): self.kernel = p elif os.path.exists(p) and (not os.path.isdir(p)) and re.search('-image-', os.path.basename(p)): self.rootfs = p dirpath = os.path.dirname(p) m = re.search('(.*)\.(.*)$', p) if m: qb = '%s%s' % (re.sub('\.rootfs$', '', m.group(1)), '.qemuboot.conf') if os.path.exists(qb): self.qemuboot = qb self.qbconfload = True else: logger.warn("%s doesn't exist" % qb) fst = m.group(2) self.check_arg_fstype(fst) else: raise Exception("Can't find FSTYPE from: %s" % p) elif os.path.isdir(p) or re.search(':', arg) and re.search('/', arg): if self.is_deploy_dir_image(p): logger.info('DEPLOY_DIR_IMAGE: %s' % p) self.set("DEPLOY_DIR_IMAGE", p) else: logger.info("Assuming %s is an nfs rootfs" % p) self.check_arg_nfs(p) else: raise Exception("Unknown path arg %s" % p) def check_arg_machine(self, arg): """Check whether it is a machine""" if self.get('MACHINE') and self.get('MACHINE') != arg or re.search('/', arg): raise Exception("Unknown arg: %s" % arg) elif self.get('MACHINE') == arg: return logger.info('Assuming MACHINE = %s' % arg) # if we're running under testimage, or similarly as a child # of an existing bitbake invocation, we can't invoke bitbake # to validate the MACHINE setting and must assume it's correct... # FIXME: testimage.bbclass exports these two variables into env, # are there other scenarios in which we need to support being # invoked by bitbake? deploy = os.environ.get('DEPLOY_DIR_IMAGE', None) bbchild = deploy and os.environ.get('OE_TMPDIR', None) if bbchild: self.set_machine_deploy_dir(arg, deploy) return cmd = 'MACHINE=%s bitbake -e' % arg logger.info('Running %s...' % cmd) self.bitbake_e = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8') # bitbake -e doesn't report invalid MACHINE as an error, so # let's check DEPLOY_DIR_IMAGE to make sure that it is a valid # MACHINE. s = re.search('^DEPLOY_DIR_IMAGE="(.*)"', self.bitbake_e, re.M) if s: deploy_dir_image = s.group(1) else: raise Exception("bitbake -e %s" % self.bitbake_e) if self.is_deploy_dir_image(deploy_dir_image): self.set_machine_deploy_dir(arg, deploy_dir_image) else: logger.error("%s not a directory valid DEPLOY_DIR_IMAGE" % deploy_dir_image) raise Exception("Failed to set MACHINE to %s. Unknown arg: %s" % (arg, arg)) def check_args(self): unknown_arg = "" for arg in sys.argv[1:]: if arg in self.fstypes + self.vmtypes: self.check_arg_fstype(arg) elif arg == 'nographic': self.qemu_opt_script += ' -nographic' self.kernel_cmdline_script += ' console=ttyS0' elif arg == 'serial': self.kernel_cmdline_script += ' console=ttyS0' self.serialstdio = True elif arg == 'audio': logger.info("Enabling audio in qemu") logger.info("Please install sound drivers in linux host") self.audio_enabled = True elif arg == 'kvm': self.kvm_enabled = True elif arg == 'kvm-vhost': self.vhost_enabled = True elif arg == 'slirp': self.slirp_enabled = True elif arg == 'publicvnc': self.qemu_opt_script += ' -vnc :0' elif arg.startswith('tcpserial='): self.tcpserial_portnum = arg[len('tcpserial='):] elif arg.startswith('biosdir='): self.custombiosdir = arg[len('biosdir='):] elif arg.startswith('biosfilename='): self.qemu_opt_script += ' -bios %s' % arg[len('biosfilename='):] elif arg.startswith('qemuparams='): self.qemu_opt_script += ' %s' % arg[len('qemuparams='):] elif arg.startswith('bootparams='): self.kernel_cmdline_script += ' %s' % arg[len('bootparams='):] elif os.path.exists(arg) or (re.search(':', arg) and re.search('/', arg)): self.check_arg_path(os.path.abspath(arg)) elif re.search('-image-', arg): # Lazy rootfs self.rootfs = arg else: # At last, assume is it the MACHINE if (not unknown_arg) or unknown_arg == arg: unknown_arg = arg else: raise Exception("Can't handle two unknown args: %s %s" % (unknown_arg, arg)) # Check to make sure it is a valid machine if unknown_arg: if self.get('MACHINE') == unknown_arg: return if not self.get('DEPLOY_DIR_IMAGE'): # Trying to get DEPLOY_DIR_IMAGE from env. p = os.getenv('DEPLOY_DIR_IMAGE') if p and self.is_deploy_dir_image(p): machine = os.path.basename(p) if unknown_arg == machine: self.set_machine_deploy_dir(machine, p) return else: logger.info('DEPLOY_DIR_IMAGE: %s' % p) self.set("DEPLOY_DIR_IMAGE", p) self.check_arg_machine(unknown_arg) def check_kvm(self): """Check kvm and kvm-host""" if not (self.kvm_enabled or self.vhost_enabled): self.qemu_opt_script += ' %s %s' % (self.get('QB_MACHINE'), self.get('QB_CPU')) return if not self.get('QB_CPU_KVM'): raise Exception("QB_CPU_KVM is NULL, this board doesn't support kvm") self.qemu_opt_script += ' %s %s' % (self.get('QB_MACHINE'), self.get('QB_CPU_KVM')) yocto_kvm_wiki = "https://wiki.yoctoproject.org/wiki/How_to_enable_KVM_for_Poky_qemu" yocto_paravirt_kvm_wiki = "https://wiki.yoctoproject.org/wiki/Running_an_x86_Yocto_Linux_image_under_QEMU_KVM" dev_kvm = '/dev/kvm' dev_vhost = '/dev/vhost-net' with open('/proc/cpuinfo', 'r') as f: kvm_cap = re.search('vmx|svm', "".join(f.readlines())) if not kvm_cap: logger.error("You are trying to enable KVM on a cpu without VT support.") logger.error("Remove kvm from the command-line, or refer:") raise Exception(yocto_kvm_wiki) if not os.path.exists(dev_kvm): logger.error("Missing KVM device. Have you inserted kvm modules?") logger.error("For further help see:") raise Exception(yocto_kvm_wiki) if os.access(dev_kvm, os.W_OK|os.R_OK): self.qemu_opt_script += ' -enable-kvm' else: logger.error("You have no read or write permission on /dev/kvm.") logger.error("Please change the ownership of this file as described at:") raise Exception(yocto_kvm_wiki) if self.vhost_enabled: if not os.path.exists(dev_vhost): logger.error("Missing virtio net device. Have you inserted vhost-net module?") logger.error("For further help see:") raise Exception(yocto_paravirt_kvm_wiki) if not os.access(dev_kvm, os.W_OK|os.R_OK): logger.error("You have no read or write permission on /dev/vhost-net.") logger.error("Please change the ownership of this file as described at:") raise Exception(yocto_kvm_wiki) def check_fstype(self): """Check and setup FSTYPE""" if not self.fstype: fstype = self.get('QB_DEFAULT_FSTYPE') if fstype: self.fstype = fstype else: raise Exception("FSTYPE is NULL!") def check_rootfs(self): """Check and set rootfs""" if self.fstype == 'nfs': return if self.rootfs and not os.path.exists(self.rootfs): # Lazy rootfs self.rootfs = "%s/%s-%s.%s" % (self.get('DEPLOY_DIR_IMAGE'), self.rootfs, self.get('MACHINE'), self.fstype) elif not self.rootfs: cmd = '%s/%s*.%s' % (self.get('DEPLOY_DIR_IMAGE'), self.get('IMAGE_NAME'), self.fstype) all_files = glob.glob(cmd) if all_files: self.rootfs = all_files[0] else: raise Exception("Failed to find rootfs: %s" % cmd) if not os.path.exists(self.rootfs): raise Exception("Can't find rootfs: %s" % self.rootfs) def check_kernel(self): """Check and set kernel, dtb""" # The vm image doesn't need a kernel if self.fstype in self.vmtypes: return kernel = self.kernel if not kernel: kernel = "%s/%s" % (self.get('DEPLOY_DIR_IMAGE'), self.get('QB_DEFAULT_KERNEL')) if os.path.exists(kernel): self.kernel = kernel else: raise Exception("KERNEL %s not found" % kernel) dtb = self.get('QB_DTB') if dtb: dtb = "%s/%s" % (self.get('DEPLOY_DIR_IMAGE'), dtb) if os.path.exists(dtb): self.set('QB_DTB', '-dtb %s' % dtb) else: raise Exception("DTB %s not found" % dtb) def check_biosdir(self): """Check custombiosdir""" if not self.custombiosdir: return biosdir = "" biosdir_native = "%s/%s" % (self.get('STAGING_DIR_NATIVE'), self.custombiosdir) biosdir_host = "%s/%s" % (self.get('STAGING_DIR_HOST'), self.custombiosdir) for i in (self.custombiosdir, biosdir_native, biosdir_host): if os.path.isdir(i): biosdir = i break if biosdir: logger.info("Assuming biosdir is: %s" % biosdir) self.qemu_opt_script += ' -L %s' % biosdir else: logger.error("Custom BIOS directory not found. Tried: %s, %s, and %s" % (self.custombiosdir, biosdir_native, biosdir_host)) raise Exception("Invalid custombiosdir: %s" % self.custombiosdir) def check_mem(self): s = re.search('-m +([0-9]+)', self.qemu_opt_script) if s: self.set('QB_MEM', '-m %s' % s.group(1)) elif not self.get('QB_MEM'): logger.info('QB_MEM is not set, use 512M by default') self.set('QB_MEM', '-m 512') self.kernel_cmdline_script += ' mem=%s' % self.get('QB_MEM').replace('-m','').strip() + 'M' self.qemu_opt_script += ' %s' % self.get('QB_MEM') def check_tcpserial(self): if self.tcpserial_portnum: if self.get('QB_TCPSERIAL_OPT'): self.qemu_opt_script += ' ' + self.get('QB_TCPSERIAL_OPT').replace('@PORT@', self.tcpserial_portnum) else: self.qemu_opt_script += ' -serial tcp:127.0.0.1:%s' % self.tcpserial_portnum def check_and_set(self): """Check configs sanity and set when needed""" check_tun() # Check audio if self.audio_enabled: if not self.get('QB_AUDIO_DRV'): raise Exception("QB_AUDIO_DRV is NULL, this board doesn't support audio") if not self.get('QB_AUDIO_OPT'): logger.warn('QB_AUDIO_OPT is NULL, you may need define it to make audio work') else: self.qemu_opt_script += ' %s' % self.get('QB_AUDIO_OPT') os.putenv('QEMU_AUDIO_DRV', self.get('QB_AUDIO_DRV')) else: os.putenv('QEMU_AUDIO_DRV', 'none') self.check_kvm() self.check_fstype() self.check_rootfs() self.check_kernel() self.check_biosdir() self.check_mem() self.check_tcpserial() def read_qemuboot(self): if not self.qemuboot: if self.get('DEPLOY_DIR_IMAGE'): deploy_dir_image = self.get('DEPLOY_DIR_IMAGE') elif os.getenv('DEPLOY_DIR_IMAGE'): deploy_dir_image = os.getenv('DEPLOY_DIR_IMAGE') else: raise Exception("DEPLOY_DIR_IMAGE is NULL!") if self.rootfs and not os.path.exists(self.rootfs): # Lazy rootfs machine = self.get('MACHINE') if not machine: machine = os.path.basename(deploy_dir_image) self.qemuboot = "%s/%s-%s.qemuboot.conf" % (deploy_dir_image, self.rootfs, machine) else: cmd = 'ls -t %s/*.qemuboot.conf' % deploy_dir_image logger.info('Running %s...' % cmd) qbs = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8') if qbs: self.qemuboot = qbs.split()[0] self.qbconfload = True if not os.path.exists(self.qemuboot): raise Exception("Failed to find .qemuboot.conf!") logger.info('CONFFILE: %s' % self.qemuboot) cf = configparser.ConfigParser() cf.read(self.qemuboot) for k, v in cf.items('config_bsp'): k_upper = k.upper() self.set(k_upper, v) # When we're started with a *.qemuboot.conf arg assume that image # artefacts are relative to that file, rather than in whatever # directory DEPLOY_DIR_IMAGE in the conf file points to. if self.qbconfload: imgdir = os.path.dirname(self.qemuboot) if imgdir != self.get('DEPLOY_DIR_IMAGE'): logger.info('Setting DEPLOY_DIR_IMAGE to folder containing %s (%s)' % (self.qemuboot, imgdir)) self.set('DEPLOY_DIR_IMAGE', imgdir) # If the STAGING_*_NATIVE directories from the config file don't exist # and we're in a sourced OE build directory try to extract the paths # from `bitbake -e` havenative = os.path.exists(self.get('STAGING_DIR_NATIVE')) and \ os.path.exists(self.get('STAGING_BINDIR_NATIVE')) if not havenative: if not self.bitbake_e: self.load_bitbake_env() if self.bitbake_e: native_vars = ['STAGING_DIR_NATIVE', 'STAGING_BINDIR_NATIVE'] for nv in native_vars: s = re.search('^%s="(.*)"' % nv, self.bitbake_e, re.M) if s and s.group(1) != self.get(nv): logger.info('Overriding conf file setting of %s to %s from Bitbake environment' % (nv, s.group(1))) self.set(nv, s.group(1)) else: # when we're invoked from a running bitbake instance we won't # be able to call `bitbake -e` but should have OE_TMPDIR set in # the environment and can guess paths based on it tmpdir = os.environ.get('OE_TMPDIR', None) if tmpdir: logger.info('Setting STAGING_DIR_NATIVE and STAGING_BINDIR_NATIVE relative to OE_TMPDIR (%s)' % tmpdir) hostos, _, _, _, machine = os.uname() buildsys = '%s-%s' % (machine, hostos.lower()) staging_dir_native = '%s/sysroots/%s' % (tmpdir, buildsys) self.set('STAGING_DIR_NATIVE', staging_dir_native) # we have to assume that STAGING_BINDIR_NATIVE is at usr/bin staging_bindir_native = '%s/usr/bin' % staging_dir_native self.set('STAGING_BINDIR_NATIVE', staging_bindir_native) def print_config(self): logger.info('Continuing with the following parameters:\n') if not self.fstype in self.vmtypes: print('KERNEL: [%s]' % self.kernel) print('MACHINE: [%s]' % self.get('MACHINE')) print('FSTYPE: [%s]' % self.fstype) if self.fstype == 'nfs': print('NFS_DIR: [%s]' % self.nfs_dir) else: print('ROOTFS: [%s]' % self.rootfs) print('CONFFILE: [%s]' % self.qemuboot) print('') def setup_nfs(self): if not self.nfs_server: if self.slirp_enabled: self.nfs_server = '10.0.2.2' else: self.nfs_server = '192.168.7.1' nfs_instance = int(self.nfs_instance) mountd_rpcport = 21111 + nfs_instance nfsd_rpcport = 11111 + nfs_instance nfsd_port = 3049 + 2 * nfs_instance mountd_port = 3048 + 2 * nfs_instance unfs_opts="nfsvers=3,port=%s,mountprog=%s,nfsprog=%s,udp,mountport=%s" % (nfsd_port, mountd_rpcport, nfsd_rpcport, mountd_port) self.unfs_opts = unfs_opts p = '%s/.runqemu-sdk/pseudo' % os.getenv('HOME') os.putenv('PSEUDO_LOCALSTATEDIR', p) # Extract .tar.bz2 or .tar.bz if no self.nfs_dir if not self.nfs_dir: src_prefix = '%s/%s' % (self.get('DEPLOY_DIR_IMAGE'), self.get('IMAGE_LINK_NAME')) dest = "%s-nfsroot" % src_prefix if os.path.exists('%s.pseudo_state' % dest): logger.info('Use %s as NFS_DIR' % dest) self.nfs_dir = dest else: src = "" src1 = '%s.tar.bz2' % src_prefix src2 = '%s.tar.gz' % src_prefix if os.path.exists(src1): src = src1 elif os.path.exists(src2): src = src2 if not src: raise Exception("No NFS_DIR is set but can't find %s or %s to extract" % (src1, src2)) logger.info('NFS_DIR not found, extracting %s to %s' % (src, dest)) cmd = 'runqemu-extract-sdk %s %s' % (src, dest) logger.info('Running %s...' % cmd) if subprocess.call(cmd, shell=True) != 0: raise Exception('Failed to run %s' % cmd) self.clean_nfs_dir = True self.nfs_dir = dest # Start the userspace NFS server cmd = 'runqemu-export-rootfs restart %s' % self.nfs_dir logger.info('Running %s...' % cmd) if subprocess.call(cmd, shell=True) != 0: raise Exception('Failed to run %s' % cmd) self.nfs_running = True def setup_slirp(self): if self.fstype == 'nfs': self.setup_nfs() self.kernel_cmdline_script += ' ip=dhcp' self.set('NETWORK_CMD', self.get('QB_SLIRP_OPT')) def setup_tap(self): """Setup tap""" # This file is created when runqemu-gen-tapdevs creates a bank of tap # devices, indicating that the user should not bring up new ones using # sudo. nosudo_flag = '/etc/runqemu-nosudo' self.qemuifup = shutil.which('runqemu-ifup') self.qemuifdown = shutil.which('runqemu-ifdown') ip = shutil.which('ip') lockdir = "/tmp/qemu-tap-locks" if not (self.qemuifup and self.qemuifdown and ip): raise Exception("runqemu-ifup, runqemu-ifdown or ip not found") if not os.path.exists(lockdir): os.mkdir(lockdir) cmd = '%s link' % ip logger.info('Running %s...' % cmd) ip_link = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8') # Matches line like: 6: tap0: possibles = re.findall('^[1-9]+: +(tap[0-9]+): <.*', ip_link, re.M) tap = "" for p in possibles: lockfile = os.path.join(lockdir, p) if os.path.exists('%s.skip' % lockfile): logger.info('Found %s.skip, skipping %s' % (lockfile, p)) continue self.lock = lockfile + '.lock' if self.acquire_lock(): tap = p logger.info("Using preconfigured tap device %s" % tap) logger.info("If this is not intended, touch %s.skip to make runqemu skip %s." %(lockfile, tap)) break if not tap: if os.path.exists(nosudo_flag): logger.error("Error: There are no available tap devices to use for networking,") logger.error("and I see %s exists, so I am not going to try creating" % nosudo_flag) raise Exception("a new one with sudo.") gid = os.getgid() uid = os.getuid() logger.info("Setting up tap interface under sudo") cmd = 'sudo %s %s %s %s' % (self.qemuifup, uid, gid, self.get('STAGING_DIR_NATIVE')) tap = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8').rstrip('\n') lockfile = os.path.join(lockdir, tap) self.lock = lockfile + '.lock' self.acquire_lock() self.cleantap = True logger.info('Created tap: %s' % tap) self.tap = tap n0 = tap[3:] n1 = int(n0) * 2 + 1 n2 = n1 + 1 self.nfs_instance = n0 if self.fstype == 'nfs': self.setup_nfs() self.kernel_cmdline_script += " ip=192.168.7.%s::192.168.7.%s:255.255.255.0" % (n2, n1) qb_tap_opt = self.get('QB_TAP_OPT') if qb_tap_opt: qemu_tap_opt = qb_tap_opt.replace('@TAP@', tap) else: qemu_tap_opt = "-net nic,model=virtio -net tap,vlan=0,ifname=%s,script=no,downscript=no" % self.tap if self.vhost_enabled: qemu_tap_opt += ',vhost=on' self.set('NETWORK_CMD', qemu_tap_opt) def setup_network(self): cmd = "stty -g" self.saved_stty = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8') if self.slirp_enabled: self.setup_slirp() else: self.setup_tap() qb_rootfs_opt = self.get('QB_ROOTFS_OPT') if qb_rootfs_opt: self.rootfs_options = qb_rootfs_opt.replace('@ROOTFS@', self.rootfs) else: self.rootfs_options = '-drive file=%s,if=virtio,format=raw' % self.rootfs if self.fstype in ('cpio.gz', 'cpio'): self.set('NETWORK_CMD', '') self.kernel_cmdline = 'root=/dev/ram0 rw debugshell' self.rootfs_options = '-initrd %s' % self.rootfs else: if self.fstype in self.vmtypes: if self.fstype == 'iso': vm_drive = '-cdrom %s' % self.rootfs else: cmd1 = "grep -q 'root=/dev/sd' %s" % self.rootfs cmd2 = "grep -q 'root=/dev/hd' %s" % self.rootfs if subprocess.call(cmd1, shell=True) == 0: logger.info('Using scsi drive') vm_drive = '-drive if=none,id=hd,file=%s -device virtio-scsi-pci,id=scsi -device scsi-hd,drive=hd' % self.rootfs elif subprocess.call(cmd2, shell=True) == 0: logger.info('Using scsi drive') vm_drive = self.rootfs else: logger.warn("Can't detect drive type %s" % self.rootfs) logger.warn('Tring to use virtio block drive') vm_drive = '-drive if=virtio,file=%s' % self.rootfs self.rootfs_options = '%s -no-reboot' % vm_drive self.kernel_cmdline = 'root=%s rw highres=off' % (self.get('QB_KERNEL_ROOT')) if self.fstype == 'nfs': self.rootfs_options = '' k_root = '/dev/nfs nfsroot=%s:%s,%s' % (self.nfs_server, self.nfs_dir, self.unfs_opts) self.kernel_cmdline = 'root=%s rw highres=off' % k_root self.set('ROOTFS_OPTIONS', self.rootfs_options) def setup_final(self): qemu_system = self.get('QB_SYSTEM_NAME') if not qemu_system: raise Exception("Failed to boot, QB_SYSTEM_NAME is NULL!") qemu_bin = '%s/%s' % (self.get('STAGING_BINDIR_NATIVE'), qemu_system) if not os.access(qemu_bin, os.X_OK): raise Exception("No QEMU binary '%s' could be found" % qemu_bin) check_libgl(qemu_bin) self.qemu_opt = "%s %s %s %s %s %s" % (qemu_bin, self.get('NETWORK_CMD'), self.qemu_opt_script, self.get('ROOTFS_OPTIONS'), self.get('QB_DTB'), self.get('QB_OPT_APPEND')) if self.serialstdio: logger.info("Interrupt character is '^]'") cmd = "stty intr ^]" subprocess.call(cmd, shell=True) first_serial = "" if not re.search("-nographic", self.qemu_opt): first_serial = "-serial mon:vc" # We always want a ttyS1. Since qemu by default adds a serial # port when nodefaults is not specified, it seems that all that # would be needed is to make sure a "-serial" is there. However, # it appears that when "-serial" is specified, it ignores the # default serial port that is normally added. So here we make # sure to add two -serial if there are none. And only one if # there is one -serial already. serial_num = len(re.findall("-serial", self.qemu_opt)) if serial_num == 0: self.qemu_opt += " %s %s" % (first_serial, self.get("QB_SERIAL_OPT")) elif serial_num == 1: self.qemu_opt += " %s" % self.get("QB_SERIAL_OPT") def start_qemu(self): if self.kernel: kernel_opts = "-kernel %s -append '%s %s %s'" % (self.kernel, self.kernel_cmdline, self.kernel_cmdline_script, self.get('QB_KERNEL_CMDLINE_APPEND')) else: kernel_opts = "" cmd = "%s %s" % (self.qemu_opt, kernel_opts) logger.info('Running %s' % cmd) if subprocess.call(cmd, shell=True) != 0: raise Exception('Failed to run %s' % cmd) def cleanup(self): if self.cleantap: cmd = 'sudo %s %s %s' % (self.qemuifdown, self.tap, self.get('STAGING_DIR_NATIVE')) logger.info('Running %s' % cmd) subprocess.call(cmd, shell=True) if self.lock_descriptor: logger.info("Releasing lockfile for tap device '%s'" % self.tap) self.release_lock() if self.nfs_running: logger.info("Shutting down the userspace NFS server...") cmd = "runqemu-export-rootfs stop %s" % self.nfs_dir logger.info('Running %s' % cmd) subprocess.call(cmd, shell=True) if self.saved_stty: cmd = "stty %s" % self.saved_stty subprocess.call(cmd, shell=True) if self.clean_nfs_dir: logger.info('Removing %s' % self.nfs_dir) shutil.rmtree(self.nfs_dir) shutil.rmtree('%s.pseudo_state' % self.nfs_dir) def load_bitbake_env(self, mach=None): if self.bitbake_e: return bitbake = shutil.which('bitbake') if not bitbake: return if not mach: mach = self.get('MACHINE') if mach: cmd = 'MACHINE=%s bitbake -e' % mach else: cmd = 'bitbake -e' logger.info('Running %s...' % cmd) try: self.bitbake_e = subprocess.check_output(cmd, shell=True).decode('utf-8') except subprocess.CalledProcessError as err: self.bitbake_e = '' logger.warn("Couldn't run 'bitbake -e' to gather environment information:\n%s" % err.output.decode('utf-8')) def main(): if len(sys.argv) == 1 or "help" in sys.argv: print_usage() return 0 config = BaseConfig() try: config.check_args() except Exception as esc: logger.error(esc) logger.error("Try 'runqemu help' on how to use it") return 1 config.read_qemuboot() config.check_and_set() config.print_config() try: config.setup_network() config.setup_final() config.start_qemu() finally: config.cleanup() return 0 if __name__ == "__main__": try: ret = main() except Exception as esc: ret = 1 import traceback traceback.print_exc() sys.exit(ret)