X-Git-Url: https://ruderich.org/simon/gitweb/?p=safcm%2Fsafcm.git;a=blobdiff_plain;f=remote%2Fsync%2Ffiles.go;h=24c59ce1d0bac7f560249f718677922a929dfa25;hp=edf81bd2cc795a2630f4b775eca25786ad838c61;hb=b38c56e45416cd64cdac2cddffb212e0d48e2638;hpb=e3d16bd668c3608bf2416bb57949678ac8300e15 diff --git a/remote/sync/files.go b/remote/sync/files.go index edf81bd..24c59ce 100644 --- a/remote/sync/files.go +++ b/remote/sync/files.go @@ -456,6 +456,13 @@ reopen: unix.Unlinkat(parentFd, tmpBase, 0) return err } + // To guarantee durability fsync must be called on a parent directory + // after adding, renaming or removing files therein. +// +// Calling sync on the files itself is not enough according to POSIX; man 2 +// fsync: "Calling fsync() does not necessarily ensure that the entry in the +// directory containing the file has also reached disk. For that an explicit +// fsync() on a file descriptor for the directory is also needed." err = unix.Fsync(parentFd) if err != nil { return err @@ -695,24 +702,3 @@ retry: return os.NewFile(uintptr(fd), ""), tmpBase, nil } - -// SyncPath syncs path, which should be a directory. To guarantee durability -// it must be called on a parent directory after adding, renaming or removing -// files therein. -// -// Calling sync on the files itself is not enough according to POSIX; man 2 -// fsync: "Calling fsync() does not necessarily ensure that the entry in the -// directory containing the file has also reached disk. For that an explicit -// fsync() on a file descriptor for the directory is also needed." -func SyncPath(path string) error { - x, err := os.Open(path) - if err != nil { - return err - } - err = x.Sync() - closeErr := x.Close() - if err != nil { - return err - } - return closeErr -}