summaryrefslogtreecommitdiffhomepage
path: root/pkg/sentry/vfs/filesystem.go
diff options
context:
space:
mode:
Diffstat (limited to 'pkg/sentry/vfs/filesystem.go')
-rwxr-xr-xpkg/sentry/vfs/filesystem.go20
1 files changed, 16 insertions, 4 deletions
diff --git a/pkg/sentry/vfs/filesystem.go b/pkg/sentry/vfs/filesystem.go
index 7a074b718..76ff8cf51 100755
--- a/pkg/sentry/vfs/filesystem.go
+++ b/pkg/sentry/vfs/filesystem.go
@@ -33,29 +33,41 @@ type Filesystem struct {
// operations.
refs int64
+ // vfs is the VirtualFilesystem that uses this Filesystem. vfs is
+ // immutable.
+ vfs *VirtualFilesystem
+
// impl is the FilesystemImpl associated with this Filesystem. impl is
// immutable. This should be the last field in Dentry.
impl FilesystemImpl
}
// Init must be called before first use of fs.
-func (fs *Filesystem) Init(impl FilesystemImpl) {
+func (fs *Filesystem) Init(vfsObj *VirtualFilesystem, impl FilesystemImpl) {
fs.refs = 1
+ fs.vfs = vfsObj
fs.impl = impl
}
+// VirtualFilesystem returns the containing VirtualFilesystem.
+func (fs *Filesystem) VirtualFilesystem() *VirtualFilesystem {
+ return fs.vfs
+}
+
// Impl returns the FilesystemImpl associated with fs.
func (fs *Filesystem) Impl() FilesystemImpl {
return fs.impl
}
-func (fs *Filesystem) incRef() {
+// IncRef increments fs' reference count.
+func (fs *Filesystem) IncRef() {
if atomic.AddInt64(&fs.refs, 1) <= 1 {
- panic("Filesystem.incRef() called without holding a reference")
+ panic("Filesystem.IncRef() called without holding a reference")
}
}
-func (fs *Filesystem) decRef() {
+// DecRef decrements fs' reference count.
+func (fs *Filesystem) DecRef() {
if refs := atomic.AddInt64(&fs.refs, -1); refs == 0 {
fs.impl.Release()
} else if refs < 0 {