diff options
| -rw-r--r-- | internal/fusefrontend/file.go | 2 | ||||
| -rw-r--r-- | internal/fusefrontend/fs.go | 17 |
2 files changed, 12 insertions, 7 deletions
diff --git a/internal/fusefrontend/file.go b/internal/fusefrontend/file.go index 7f25172..780a792 100644 --- a/internal/fusefrontend/file.go +++ b/internal/fusefrontend/file.go @@ -489,6 +489,8 @@ func (f *file) GetAttr(a *fuse.Attr) fuse.Status { var allocateWarnOnce sync.Once // Allocate - FUSE call, fallocate(2) +// This is not implemented yet in gocryptfs, but it is neither in EncFS. This +// suggests that the user demand is low. func (f *file) Allocate(off uint64, sz uint64, mode uint32) fuse.Status { allocateWarnOnce.Do(func() { tlog.Warn.Printf("fallocate(2) is not supported, returning ENOSYS - see https://github.com/rfjakob/gocryptfs/issues/1") diff --git a/internal/fusefrontend/fs.go b/internal/fusefrontend/fs.go index 20079b2..640c45d 100644 --- a/internal/fusefrontend/fs.go +++ b/internal/fusefrontend/fs.go @@ -207,14 +207,17 @@ func (fs *FS) Mknod(path string, mode uint32, dev uint32, context *fuse.Context) return fs.FileSystem.Mknod(cPath, mode, dev, context) } -// Only warn once -var truncateWarnOnce sync.Once - +// Support truncate(2) by opening the file and calling ftruncate(2) +// While the glibc "truncate" wrapper seems to always use ftruncate, fsstress from +// xfstests uses this a lot by calling "truncate64" directly. func (fs *FS) Truncate(path string, offset uint64, context *fuse.Context) (code fuse.Status) { - truncateWarnOnce.Do(func() { - tlog.Warn.Printf("truncate(2) is not supported, returning ENOSYS - use ftruncate(2)") - }) - return fuse.ENOSYS + file, code := fs.Open(path, uint32(os.O_RDWR), context) + if code != fuse.OK { + return code + } + code = file.Truncate(offset) + file.Release() + return code } func (fs *FS) Utimens(path string, Atime *time.Time, Mtime *time.Time, context *fuse.Context) (code fuse.Status) { |