How to use isSupportedMount method of host Package

Best Syzkaller code snippet using host.isSupportedMount

syscalls_linux.go

Source:syscalls_linux.go

...32	if strings.HasPrefix(c.Name, "openat$") {33		return isSupportedOpenAt(c)34	}35	if strings.HasPrefix(c.Name, "mount$") {36		return isSupportedMount(c, sandbox)37	}38	if c.Name == "ioctl$EXT4_IOC_SHUTDOWN" && sandbox == "none" {39		// Don't shutdown root filesystem.40		return false, "unsafe with sandbox=none"41	}42	// There are 3 possible strategies for detecting supported syscalls:43	// 1. Executes all syscalls with presumably invalid arguments and check for ENOprog.44	//    But not all syscalls are safe to execute. For example, pause will hang,45	//    while setpgrp will push the process into own process group.46	// 2. Check presence of /sys/kernel/debug/tracing/events/syscalls/sys_enter_* files.47	//    This requires root and CONFIG_FTRACE_SYSCALLS. Also it lies for some syscalls.48	//    For example, on x86_64 it says that sendfile is not present (only sendfile64).49	// 3. Check sys_syscallname in /proc/kallsyms.50	//    Requires CONFIG_KALLSYMS.51	// Kallsyms seems to be the most reliable and fast. That's what we use first.52	// If kallsyms is not present, we fallback to execution of syscalls.53	kallsymsOnce.Do(func() {54		kallsyms, _ := ioutil.ReadFile("/proc/kallsyms")55		if len(kallsyms) == 0 {56			return57		}58		kallsymsSyscallSet = parseKallsyms(kallsyms, target.Arch)59	})60	if !testFallback && len(kallsymsSyscallSet) != 0 {61		r, v := isSupportedKallsyms(c)62		return r, v63	}64	return isSupportedTrial(c)65}66func parseKallsyms(kallsyms []byte, arch string) map[string]bool {67	set := make(map[string]bool)68	var re *regexp.Regexp69	switch arch {70	case "386", "amd64":71		re = regexp.MustCompile(` T (__ia32_|__x64_)?sys_([^\n]+)\n`)72	case "arm", "arm64":73		re = regexp.MustCompile(` T (__arm64_)?sys_([^\n]+)\n`)74	case "ppc64le":75		re = regexp.MustCompile(` T ()?sys_([^\n]+)\n`)76	case "mips64le":77		re = regexp.MustCompile(` T sys_(mips_)?([^\n]+)\n`)78	default:79		panic("unsupported arch for kallsyms parsing")80	}81	matches := re.FindAllSubmatch(kallsyms, -1)82	for _, m := range matches {83		name := string(m[2])84		log.Logf(2, "found in kallsyms: %v", name)85		set[name] = true86	}87	return set88}89func isSupportedKallsyms(c *prog.Syscall) (bool, string) {90	name := c.CallName91	if newname := kallsymsRenameMap[name]; newname != "" {92		name = newname93	}94	if !kallsymsSyscallSet[name] {95		return false, fmt.Sprintf("sys_%v is not present in /proc/kallsyms", name)96	}97	return true, ""98}99func isSupportedTrial(c *prog.Syscall) (bool, string) {100	switch c.CallName {101	// These known to cause hangs.102	case "exit", "pause":103		return true, ""104	}105	trialMu.Lock()106	defer trialMu.Unlock()107	if res, ok := trialSupported[c.NR]; ok {108		return res, "ENOSYS"109	}110	cmd := osutil.Command(os.Args[0])111	cmd.Env = []string{fmt.Sprintf("SYZ_TRIAL_TEST=%v", c.NR)}112	_, err := osutil.Run(10*time.Second, cmd)113	res := err != nil114	trialSupported[c.NR] = res115	return res, "ENOSYS"116}117func init() {118	str := os.Getenv("SYZ_TRIAL_TEST")119	if str == "" {120		return121	}122	nr, err := strconv.Atoi(str)123	if err != nil {124		panic(err)125	}126	arg := ^uintptr(0) - 1e4 // something as invalid as possible127	_, _, err = syscall.Syscall6(uintptr(nr), arg, arg, arg, arg, arg, arg)128	if err == syscall.ENOSYS {129		os.Exit(0)130	}131	os.Exit(1)132}133// Some syscall names diverge in __NR_* consts and kallsyms.134// umount2 is renamed to umount in arch/x86/entry/syscalls/syscall_64.tbl.135// Where umount is renamed to oldumount is unclear.136var (137	kallsymsOnce       sync.Once138	kallsymsSyscallSet map[string]bool139	kallsymsRenameMap  = map[string]string{140		"umount":  "oldumount",141		"umount2": "umount",142		"stat":    "newstat",143	}144	trialMu         sync.Mutex145	trialSupported  = make(map[uint64]bool)146	filesystems     []byte147	filesystemsOnce sync.Once148	lsmOnce         sync.Once149	lsmError        error150	lsmDisabled     map[string]bool151)152// The function is lengthy as it handles all pseudo-syscalls,153// but it does not seem to cause comprehension problems as there is no shared state.154// Splitting this per-syscall will only increase code size.155func isSupportedSyzkall(sandbox string, c *prog.Syscall) (bool, string) {156	switch c.CallName {157	case "syz_open_dev":158		return isSupportedSyzOpenDev(sandbox, c)159	case "syz_open_procfs":160		return true, ""161	case "syz_open_pts":162		return true, ""163	case "syz_emit_ethernet", "syz_extract_tcp_res":164		reason := checkNetInjection()165		return reason == "", reason166	case "syz_usb_connect", "syz_usb_connect_ath9k", "syz_usb_disconnect",167		"syz_usb_control_io", "syz_usb_ep_write", "syz_usb_ep_read":168		reason := checkUSBEmulation()169		return reason == "", reason170	case "syz_kvm_setup_cpu":171		switch c.Name {172		case "syz_kvm_setup_cpu$x86":173			if runtime.GOARCH == "amd64" || runtime.GOARCH == "386" {174				return true, ""175			}176		case "syz_kvm_setup_cpu$arm64":177			if runtime.GOARCH == "arm64" {178				return true, ""179			}180		}181		return false, "unsupported arch"182	case "syz_init_net_socket":183		// Unfortunately this only works with sandbox none at the moment.184		// The problem is that setns of a network namespace requires CAP_SYS_ADMIN185		// in the target namespace, and we've lost all privs in the init namespace186		// during creation of a user namespace.187		if ok, reason := onlySandboxNone(sandbox); !ok {188			return false, reason189		}190		return isSupportedSocket(c)191	case "syz_genetlink_get_family_id":192		fd, err := syscall.Socket(syscall.AF_NETLINK, syscall.SOCK_RAW, syscall.NETLINK_GENERIC)193		if fd == -1 {194			return false, fmt.Sprintf("socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) failed: %v", err)195		}196		syscall.Close(fd)197		return true, ""198	case "syz_mount_image":199		if ok, reason := onlySandboxNone(sandbox); !ok {200			return ok, reason201		}202		fstype, ok := extractStringConst(c.Args[0].Type)203		if !ok {204			panic("syz_mount_image arg is not string")205		}206		return isSupportedFilesystem(fstype)207	case "syz_read_part_table":208		return onlySandboxNone(sandbox)209	case "syz_execute_func":210		return true, ""211	}212	panic("unknown syzkall: " + c.Name)213}214func isSupportedSyzOpenDev(sandbox string, c *prog.Syscall) (bool, string) {215	if _, ok := c.Args[0].Type.(*prog.ConstType); ok {216		// This is for syz_open_dev$char/block.217		return true, ""218	}219	fname, ok := extractStringConst(c.Args[0].Type)220	if !ok {221		panic("first open arg is not a pointer to string const")222	}223	if !strings.Contains(fname, "#") {224		panic(fmt.Sprintf("%v does not contain # in the file name (should be openat)", c.Name))225	}226	if checkUSBEmulation() == "" {227		// These entries might not be available at boot time,228		// but will be created by connected USB devices.229		USBDevicePrefixes := []string{230			"/dev/hidraw", "/dev/usb/hiddev", "/dev/input/",231		}232		for _, prefix := range USBDevicePrefixes {233			if strings.HasPrefix(fname, prefix) {234				return true, ""235			}236		}237	}238	var check func(dev string) bool239	check = func(dev string) bool {240		if !strings.Contains(dev, "#") {241			// Note: don't try to open them all, some can hang (e.g. /dev/snd/pcmC#D#p).242			return osutil.IsExist(dev)243		}244		for i := 0; i < 10; i++ {245			if check(strings.Replace(dev, "#", strconv.Itoa(i), 1)) {246				return true247			}248		}249		return false250	}251	if !check(fname) {252		return false, fmt.Sprintf("file %v does not exist", fname)253	}254	return onlySandboxNoneOrNamespace(sandbox)255}256func isSupportedLSM(c *prog.Syscall) string {257	lsmOnce.Do(func() {258		data, err := ioutil.ReadFile("/sys/kernel/security/lsm")259		if err != nil {260			// securityfs may not be mounted, but it does not mean261			// that no LSMs are enabled.262			if !os.IsNotExist(err) {263				lsmError = err264			}265			return266		}267		lsmDisabled = make(map[string]bool)268		for _, lsm := range []string{"selinux", "apparmor", "smack"} {269			if !strings.Contains(string(data), lsm) {270				lsmDisabled[lsm] = true271			}272		}273	})274	if lsmError != nil {275		return lsmError.Error()276	}277	for lsm := range lsmDisabled {278		if strings.Contains(strings.ToLower(c.Name), lsm) {279			return fmt.Sprintf("LSM %v is not enabled", lsm)280		}281	}282	return ""283}284func onlySandboxNone(sandbox string) (bool, string) {285	if syscall.Getuid() != 0 || sandbox != "none" {286		return false, "only supported under root with sandbox=none"287	}288	return true, ""289}290func onlySandboxNoneOrNamespace(sandbox string) (bool, string) {291	if syscall.Getuid() != 0 || sandbox == "setuid" {292		return false, "only supported under root with sandbox=none/namespace"293	}294	return true, ""295}296func isSupportedSocket(c *prog.Syscall) (bool, string) {297	af, ok := c.Args[0].Type.(*prog.ConstType)298	if !ok {299		panic("socket family is not const")300	}301	fd, err := syscall.Socket(int(af.Val), 0, 0)302	if fd != -1 {303		syscall.Close(fd)304	}305	if err == syscall.ENOSYS {306		return false, "socket syscall returns ENOSYS"307	}308	if err == syscall.EAFNOSUPPORT {309		return false, "socket family is not supported (EAFNOSUPPORT)"310	}311	proto, ok := c.Args[2].Type.(*prog.ConstType)312	if !ok {313		return true, ""314	}315	var typ uint64316	if arg, ok := c.Args[1].Type.(*prog.ConstType); ok {317		typ = arg.Val318	} else if arg, ok := c.Args[1].Type.(*prog.FlagsType); ok {319		typ = arg.Vals[0]320	} else {321		return true, ""322	}323	fd, err = syscall.Socket(int(af.Val), int(typ), int(proto.Val))324	if fd != -1 {325		syscall.Close(fd)326		return true, ""327	}328	return false, err.Error()329}330func isSupportedOpenAt(c *prog.Syscall) (bool, string) {331	var fd int332	var err error333	fname, ok := extractStringConst(c.Args[1].Type)334	if !ok || len(fname) == 0 || fname[0] != '/' {335		return true, ""336	}337	modes := []int{syscall.O_RDONLY, syscall.O_WRONLY, syscall.O_RDWR}338	// Attempt to extract flags from the syscall description339	if mode, ok := c.Args[2].Type.(*prog.ConstType); ok {340		modes = []int{int(mode.Val)}341	}342	for _, mode := range modes {343		fd, err = syscall.Open(fname, mode, 0)344		if fd != -1 {345			syscall.Close(fd)346		}347		if err == nil {348			return true, ""349		}350	}351	return false, fmt.Sprintf("open(%v) failed: %v", fname, err)352}353func isSupportedMount(c *prog.Syscall, sandbox string) (bool, string) {354	fstype, ok := extractStringConst(c.Args[2].Type)355	if !ok {356		panic(fmt.Sprintf("%v: filesystem is not string const", c.Name))357	}358	if ok, reason := isSupportedFilesystem(fstype); !ok {359		return ok, reason360	}361	switch fstype {362	case "fuse", "fuseblk":363		if err := osutil.IsAccessible("/dev/fuse"); err != nil {364			return false, err.Error()365		}366		return onlySandboxNoneOrNamespace(sandbox)367	default:...

isSupportedMount

Using AI Code Generation

1import (2func main() {3	ctx, cancel := context.WithCancel(context.Background())4	defer cancel()5	u, err := url.Parse(os.Args[1])6	if err != nil {7		log.Fatal(err)8	}9	u.User = url.UserPassword(os.Args[2], os.Args[3])10	c, err := govmomi.NewClient(ctx, u, true)11	if err != nil {12		log.Fatal(err)13	}14	f := find.NewFinder(c.Client, true)15	dc, err := f.DefaultDatacenter(ctx)16	if err != nil {17		log.Fatal(err)18	}19	f.SetDatacenter(dc)20	host, err := f.DefaultHostSystem(ctx)21	if err != nil {22		log.Fatal(err)23	}24	err = host.Properties(ctx, host.Reference(), []string{"configManager.storageSystem"}, &h)25	if err != nil {26		log.Fatal(err)27	}28	storageSystem := object.NewStorageResourceManager(c.Client)29	storageSystem := object.NewStorageResourceManager(c.Client)30	mountInfo, err := storageSystem.QueryStorageArrayType(ctx, h.ConfigManager.StorageSystem.Reference())31	if err != nil {32		log.Fatal(err)33	}34	mountInfo, err := storageSystem.QueryStorageArrayType(ctx, h.ConfigManager.StorageSystem.Reference())35	if err != nil {36		log.Fatal(err)37	}38	for _, mount := range mountInfo {39		fmt.Printf("Mount: %s40		fmt.Printf("Mount: %s

isSupportedMount

Using AI Code Generation

1func (h *host) isSupportedMount(mountType string) bool {2    for _, t := range h.SupportedMounts {3        if t == mountType {4        }5    }6}7func (h *host) isSupportedMount(mountType string) bool {8    for _, t := range h.SupportedMounts {9        if t == mountType {10        }11    }12}13func (h *host) isSupportedMount(mountType string) bool {14    for _, t := range h.SupportedMounts {15        if t == mountType {16        }17    }18}19func (h *host) isSupportedMount(mountType string) bool {20    for _, t := range h.SupportedMounts {21        if t == mountType {22        }23    }24}25func (h *host) isSupportedMount(mountType string) bool {26    for _, t := range h.SupportedMounts {27        if t == mountType {28        }29    }30}31func (h *host) isSupportedMount(mountType string) bool {32    for _, t := range h.SupportedMounts {33        if t == mountType {34        }35    }36}37func (h *host) isSupportedMount(mountType string) bool {38    for _, t := range h.SupportedMounts {39        if t == mountType {40        }41    }42}43func (h *host) isSupportedMount(mountType string) bool {44    for _, t := range h.SupportedMounts {

isSupportedMount

Using AI Code Generation

1func main() {2    host := new(Host)3    host.isSupportedMount()4}5func (h *Host) isSupportedMount() {6    fmt.Println("isSupportedMount method of host class")7}8func main() {9    host := new(Host)10    host.isSupportedMount()11}12func (h *Host) isSupportedMount() {13    fmt.Println("isSupportedMount method of host class")14}15import (16func main() {17    http.HandleFunc("/", handler)18    log.Fatal(http.ListenAndServe(":8080", nil))19}20func handler(w http.ResponseWriter, r *http.Request) {21    fmt.Fprintf(w, "Hello, %q", html.EscapeString(r.URL.Path))22}23I have imported the html package in the code. I am using go version go1.9.2 linux/amd64

isSupportedMount

Using AI Code Generation

1func main() {2    if err != nil {3        log.Fatal(err)4    }5    defer host.CloseConnection()6    supported, err := host.IsSupportedMount()7    if err != nil {8        log.Fatal(err)9    }10    if !supported {11        log.Fatal("mount is not supported")12    }13    domain, err := host.DomainDefineXML(diskXML)14    if err != nil {15        log.Fatal(err)16    }17    defer domain.Free()18    mountPoint, err := host.MountStoragePool("default", 0)19    if err != nil {20        log.Fatal(err)21    }22    defer mountPoint.Free()23    err = domain.AttachDeviceFlags(diskXML, libvirt.DOMAIN_DEVICE_MODIFY_CONFIG)24    if err != nil {25        log.Fatal(err)26    }27    err = domain.DetachDeviceFlags(diskXML, libvirt.DOMAIN_DEVICE_MODIFY_CONFIG)28    if err != nil {29        log.Fatal(err)30    }31}

isSupportedMount

Using AI Code Generation

1func isSupportedMount(hostVolume string) bool {2        if hostVolume != "" {3                if _, err := os.Stat(hostVolume); err == nil {4                }5        }6}7func isSupportedMount(hostVolume string) bool {8        if hostVolume != "" {9                if _, err := os.Stat(hostVolume); err == nil {10                }11        }12}13func isSupportedMount(hostVolume string) bool {14        if hostVolume != "" {15                if _, err := os.Stat(hostVolume); err == nil {16                }17        }18}19func isSupportedMount(hostVolume string) bool {20        if hostVolume != "" {21                if _, err := os.Stat(hostVolume); err == nil {22                }23        }24}25func isSupportedMount(hostVolume string) bool {26        if hostVolume != "" {27                if _, err := os.Stat(hostVolume); err == nil {28                }29        }30}31func isSupportedMount(hostVolume string) bool {32        if hostVolume != "" {33                if _, err := os.Stat(hostVolume); err == nil {34                }35        }36}37func isSupportedMount(hostVolume string) bool {38        if hostVolume != "" {39                if _, err := os.Stat(hostVolume); err == nil {40                }41        }42}43func isSupportedMount(hostVolume string) bool {44        if hostVolume != "" {45                if _, err := os.Stat(hostVolume); err == nil {46                }47        }48}49func isSupportedMount(hostVolume string) bool {50        if hostVolume != "" {

isSupportedMount

Using AI Code Generation

1import (2func main() {3    host := os.Host()4    supported := host.isSupportedMount(mountPoint)5    fmt.Printf("Is the mount point %s supported? %v", mountPoint, supported)6}

isSupportedMount

Using AI Code Generation

1if !host.IsSupportedMount() {2log.Errorf("Mounting of %s is not supported on this host", mnt.Source)3return nil, fmt.Errorf("Mounting of %s is not supported on this host", mnt.Source)4}5if !host.IsSupportedMount() {6log.Errorf("Mounting of %s is not supported on this host", mnt.Source)7return nil, fmt.Errorf("Mounting of %s is not supported on this host", mnt.Source)8}9if !host.IsSupportedMount() {10log.Errorf("Mounting of %s is not supported on this host", mnt.Source)11return nil, fmt.Errorf("Mounting of %s is not supported on this host", mnt.Source)12}13if !host.IsSupportedMount() {14log.Errorf("Mounting of %s is not supported on this host", mnt.Source)15return nil, fmt.Errorf("Mounting of %s is not supported on this host", mnt.Source)16}17if !host.IsSupportedMount() {18log.Errorf("Mounting of %s is not supported on this host", mnt.Source)19return nil, fmt.Errorf("Mounting of %s is not supported on this host", mnt.Source)20}21if !host.IsSupportedMount() {22log.Errorf("Mounting of %s is not supported on this host", mnt.Source)23return nil, fmt.Errorf("Mounting of %s is not supported on this host", mnt.Source)24}25if !host.IsSupportedMount() {26log.Errorf("Mounting of %s is not supported on this host", mnt.Source)27return nil, fmt.Errorf("Mounting of %s is not supported on this host", mnt.Source)28}29if !host.IsSupportedMount() {30log.Errorf("Mounting of %

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