hardcoresushi/libgocryptfs
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fusefrontend: use NsecToTimespec() for Utimens

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This fixes a build problem on 32-bit hosts:

  internal/fusefrontend/file.go:400: cannot use a.Unix() (type int64) as
  type int32 in assignment
  internal/fusefrontend/file.go:406: cannot use m.Unix() (type int64) as
  type int32 in assignment

It also enables full nanosecond timestamps for dates
after 1970.
This commit is contained in:
Jakob Unterwurzacher 2016-08-09 22:18:46 +02:00
parent fc0de96763
commit af5441dcd9
2 changed files with 24 additions and 15 deletions
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30
internal/fusefrontend/file.go
View File

@ -388,23 +388,29 @@ func (f *file) GetAttr(a *fuse.Attr) fuse.Status {
const _UTIME_OMIT = ((1 << 30) - 2)
// utimeToTimespec converts a "time.Time" pointer as passed to Utimens to a
// Timespec that can be passed to the utimensat syscall.
func utimeToTimespec(t *time.Time) (ts syscall.Timespec) {
if t == nil {
ts.Nsec = _UTIME_OMIT
} else {
ts = syscall.NsecToTimespec(t.UnixNano())
// For dates before 1970, NsecToTimespec incorrectly returns negative
// nanoseconds. Ticket: https://github.com/golang/go/issues/12777
if ts.Nsec < 0 {
ts.Nsec = 0
}
}
return ts
}
func (f *file) Utimens(a *time.Time, m *time.Time) fuse.Status {
f.fdLock.RLock()
defer f.fdLock.RUnlock()
ts := make([]syscall.Timespec, 2)
if a == nil {
ts[0].Nsec = _UTIME_OMIT
} else {
ts[0].Sec = a.Unix()
}
if m == nil {
ts[1].Nsec = _UTIME_OMIT
} else {
ts[1].Sec = m.Unix()
}
ts[0] = utimeToTimespec(a)
ts[1] = utimeToTimespec(m)
fn := fmt.Sprintf("/proc/self/fd/%d", f.fd.Fd())
err := syscall.UtimesNano(fn, ts)

9
internal/fusefrontend/fs.go
View File

@ -230,15 +230,18 @@ func (fs *FS) Truncate(path string, offset uint64, context *fuse.Context) (code
return code
}
func (fs *FS) Utimens(path string, Atime *time.Time, Mtime *time.Time, context *fuse.Context) (code fuse.Status) {
func (fs *FS) Utimens(path string, a *time.Time, m *time.Time, context *fuse.Context) (code fuse.Status) {
if fs.isFiltered(path) {
return fuse.EPERM
}
cPath, err := fs.encryptPath(path)
cPath, err := fs.getBackingPath(path)
if err != nil {
return fuse.ToStatus(err)
}
return fs.FileSystem.Utimens(cPath, Atime, Mtime, context)
ts := make([]syscall.Timespec, 2)
ts[0] = utimeToTimespec(a)
ts[1] = utimeToTimespec(m)
return fuse.ToStatus(syscall.UtimesNano(cPath, ts))
}
func (fs *FS) StatFs(path string) *fuse.StatfsOut {