c318ec8a33
diffs and relevant changes: docker/docker:c2cc352355...af34b94a78- replace pkg/symlink with github.com/moby/sys/symlink moby/sys:6154f11e68...1bc8673b57changes: - mount, mountinfo: Add support for OpenBSD in addition to FreeBSD - mount, mountinfo: Exclude macOS (darwin) - mount.RecursiveUnmount(): minor improvements - mount.RecursiveUnmount: add a fast path - mount: bump mountinfo to v0.3.1 - mount: Some refactor and improved GoDoc about Windows support - mount: use MNT_* flags from golang.org/x/sys/unix on freebsd (reduces use of cgo) - mountinfo.Mounted: add fast path for Linux using openat2 - mountinfo.Mounted: optimize by adding fast paths - mountinfo: correctness improvements - mountinfo: deprecate PidMountInfo - mountinfo: fix not showing package doc, typos - mountinfo: fix path unescaping - mountinfo: make GetMountinfoFromReader Linux-specific - mountinfo: rename FstypeFilter -> FSTypeFilter, fix FilterFunc docs - mountinfo: use idiomatic naming for fields - Migrate github.com/docker/docker/pkg/symlink Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
62 lines
1.2 KiB
Go
62 lines
1.2 KiB
Go
// +build freebsd,cgo openbsd,cgo
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package mount
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/*
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/_iovec.h>
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#include <sys/mount.h>
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#include <sys/param.h>
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*/
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import "C"
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import (
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"strings"
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"syscall"
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"unsafe"
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)
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func allocateIOVecs(options []string) []C.struct_iovec {
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out := make([]C.struct_iovec, len(options))
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for i, option := range options {
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out[i].iov_base = unsafe.Pointer(C.CString(option))
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out[i].iov_len = C.size_t(len(option) + 1)
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}
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return out
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}
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func mount(device, target, mType string, flag uintptr, data string) error {
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isNullFS := false
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xs := strings.Split(data, ",")
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for _, x := range xs {
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if x == "bind" {
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isNullFS = true
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}
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}
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options := []string{"fspath", target}
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if isNullFS {
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options = append(options, "fstype", "nullfs", "target", device)
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} else {
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options = append(options, "fstype", mType, "from", device)
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}
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rawOptions := allocateIOVecs(options)
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for _, rawOption := range rawOptions {
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defer C.free(rawOption.iov_base)
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}
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if errno := C.nmount(&rawOptions[0], C.uint(len(options)), C.int(flag)); errno != 0 {
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return &mountError{
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op: "mount",
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source: device,
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target: target,
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flags: flag,
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err: syscall.Errno(errno),
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}
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}
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return nil
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}
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