diff options
Diffstat (limited to 'pkg/sentry/fs/gofer/path.go')
| -rw-r--r-- | pkg/sentry/fs/gofer/path.go | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/pkg/sentry/fs/gofer/path.go b/pkg/sentry/fs/gofer/path.go index 6ed50a77f..092f8b586 100644 --- a/pkg/sentry/fs/gofer/path.go +++ b/pkg/sentry/fs/gofer/path.go @@ -282,10 +282,22 @@ func (i *inodeOperations) Bind(ctx context.Context, dir *fs.Inode, name string, return childDir, nil } -// CreateFifo implements fs.InodeOperations.CreateFifo. Gofer nodes do not support the -// creation of fifos and always returns EPERM. -func (*inodeOperations) CreateFifo(context.Context, *fs.Inode, string, fs.FilePermissions) error { - return syscall.EPERM +// CreateFifo implements fs.InodeOperations.CreateFifo. +func (i *inodeOperations) CreateFifo(ctx context.Context, dir *fs.Inode, name string, perm fs.FilePermissions) error { + if len(name) > maxFilenameLen { + return syserror.ENAMETOOLONG + } + + owner := fs.FileOwnerFromContext(ctx) + mode := p9.FileMode(perm.LinuxMode()) | p9.ModeNamedPipe + + // N.B. FIFOs use major/minor numbers 0. + if _, err := i.fileState.file.mknod(ctx, name, mode, 0, 0, p9.UID(owner.UID), p9.GID(owner.GID)); err != nil { + return err + } + + i.touchModificationAndStatusChangeTime(ctx, dir) + return nil } // Remove implements InodeOperations.Remove. |