Merge release-20200810.0-58-ge5f05d9bf (automated)

7 files changed, 27 insertions, 41 deletions

diff --git a/pkg/abi/linux/linux_abi_autogen_unsafe.go b/pkg/abi/linux/linux_abi_autogen_unsafe.go
index 223a6064a..3b3bb8c7b 100644
--- a/pkg/abi/linux/linux_abi_autogen_unsafe.go
+++ b/pkg/abi/linux/linux_abi_autogen_unsafe.go
@@ -152,7 +152,7 @@ func (s *Statx) UnmarshalBytes(src []byte) {
 // Packed implements marshal.Marshallable.Packed.
 //go:nosplit
 func (s *Statx) Packed() bool {
-    return s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed()
+    return s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed()
 }
 
 // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
@@ -208,7 +208,7 @@ func (s *Statx) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) {
 // CopyIn implements marshal.Marshallable.CopyIn.
 //go:nosplit
 func (s *Statx) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
-    if !s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() {
+    if !s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() {
         // Type Statx doesn't have a packed layout in memory, fall back to UnmarshalBytes.
         buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay.
         length, err := task.CopyInBytes(addr, buf) // escapes: okay.
@@ -234,7 +234,7 @@ func (s *Statx) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
 
 // WriteTo implements io.WriterTo.WriteTo.
 func (s *Statx) WriteTo(w io.Writer) (int64, error) {
-    if !s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() {
+    if !s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() {
         // Type Statx doesn't have a packed layout in memory, fall back to MarshalBytes.
         buf := make([]byte, s.SizeBytes())
         s.MarshalBytes(buf)
@@ -653,7 +653,7 @@ func (f *FUSEHeaderIn) UnmarshalUnsafe(src []byte) {
 // CopyOutN implements marshal.Marshallable.CopyOutN.
 //go:nosplit
 func (f *FUSEHeaderIn) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
-    if !f.Unique.Packed() && f.Opcode.Packed() {
+    if !f.Opcode.Packed() && f.Unique.Packed() {
         // Type FUSEHeaderIn doesn't have a packed layout in memory, fall back to MarshalBytes.
         buf := task.CopyScratchBuffer(f.SizeBytes()) // escapes: okay.
         f.MarshalBytes(buf) // escapes: fallback.
@@ -2020,7 +2020,7 @@ func (i *IPTEntry) UnmarshalBytes(src []byte) {
 // Packed implements marshal.Marshallable.Packed.
 //go:nosplit
 func (i *IPTEntry) Packed() bool {
-    return i.Counters.Packed() && i.IP.Packed()
+    return i.IP.Packed() && i.Counters.Packed()
 }
 
 // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
@@ -2264,7 +2264,7 @@ func (i *IPTIP) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) {
 // CopyIn implements marshal.Marshallable.CopyIn.
 //go:nosplit
 func (i *IPTIP) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
-    if !i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() {
+    if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() {
         // Type IPTIP doesn't have a packed layout in memory, fall back to UnmarshalBytes.
         buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay.
         length, err := task.CopyInBytes(addr, buf) // escapes: okay.
@@ -2290,7 +2290,7 @@ func (i *IPTIP) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
 
 // WriteTo implements io.WriterTo.WriteTo.
 func (i *IPTIP) WriteTo(w io.Writer) (int64, error) {
-    if !i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() {
+    if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() {
         // Type IPTIP doesn't have a packed layout in memory, fall back to MarshalBytes.
         buf := make([]byte, i.SizeBytes())
         i.MarshalBytes(buf)
@@ -3014,7 +3014,7 @@ func (i *IP6TEntry) MarshalUnsafe(dst []byte) {
 
 // UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
 func (i *IP6TEntry) UnmarshalUnsafe(src []byte) {
-    if i.Counters.Packed() && i.IPv6.Packed() {
+    if i.IPv6.Packed() && i.Counters.Packed() {
         safecopy.CopyOut(unsafe.Pointer(i), src)
     } else {
         // Type IP6TEntry doesn't have a packed layout in memory, fallback to UnmarshalBytes.
diff --git a/pkg/sentry/fsimpl/host/host.go b/pkg/sentry/fsimpl/host/host.go
index bd6caba06..56869f59a 100644
--- a/pkg/sentry/fsimpl/host/host.go
+++ b/pkg/sentry/fsimpl/host/host.go
@@ -432,17 +432,14 @@ func (i *inode) SetStat(ctx context.Context, fs *vfs.Filesystem, creds *auth.Cre
 
 // DecRef implements kernfs.Inode.
 func (i *inode) DecRef(ctx context.Context) {
-	i.AtomicRefCount.DecRefWithDestructor(ctx, i.Destroy)
-}
-
-// Destroy implements kernfs.Inode.
-func (i *inode) Destroy(context.Context) {
-	if i.wouldBlock {
-		fdnotifier.RemoveFD(int32(i.hostFD))
-	}
-	if err := unix.Close(i.hostFD); err != nil {
-		log.Warningf("failed to close host fd %d: %v", i.hostFD, err)
-	}
+	i.AtomicRefCount.DecRefWithDestructor(ctx, func(context.Context) {
+		if i.wouldBlock {
+			fdnotifier.RemoveFD(int32(i.hostFD))
+		}
+		if err := unix.Close(i.hostFD); err != nil {
+			log.Warningf("failed to close host fd %d: %v", i.hostFD, err)
+		}
+	})
 }
 
 // Open implements kernfs.Inode.
diff --git a/pkg/sentry/fsimpl/kernfs/inode_impl_util.go b/pkg/sentry/fsimpl/kernfs/inode_impl_util.go
index c3efcf3ec..fe8a1e710 100644
--- a/pkg/sentry/fsimpl/kernfs/inode_impl_util.go
+++ b/pkg/sentry/fsimpl/kernfs/inode_impl_util.go
@@ -48,10 +48,6 @@ func (InodeNoopRefCount) TryIncRef() bool {
 	return true
 }
 
-// Destroy implements Inode.Destroy.
-func (InodeNoopRefCount) Destroy(context.Context) {
-}
-
 // InodeDirectoryNoNewChildren partially implements the Inode interface.
 // InodeDirectoryNoNewChildren represents a directory inode which does not
 // support creation of new children.
@@ -367,15 +363,12 @@ func (o *OrderedChildren) Init(opts OrderedChildrenOptions) {
 
 // DecRef implements Inode.DecRef.
 func (o *OrderedChildren) DecRef(ctx context.Context) {
-	o.AtomicRefCount.DecRefWithDestructor(ctx, o.Destroy)
-}
-
-// Destroy cleans up resources referenced by this OrderedChildren.
-func (o *OrderedChildren) Destroy(context.Context) {
-	o.mu.Lock()
-	defer o.mu.Unlock()
-	o.order.Reset()
-	o.set = nil
+	o.AtomicRefCount.DecRefWithDestructor(ctx, func(context.Context) {
+		o.mu.Lock()
+		defer o.mu.Unlock()
+		o.order.Reset()
+		o.set = nil
+	})
 }
 
 // Populate inserts children into this OrderedChildren, and d's dentry
diff --git a/pkg/sentry/fsimpl/kernfs/kernfs.go b/pkg/sentry/fsimpl/kernfs/kernfs.go
index 080118841..51dbc050c 100644
--- a/pkg/sentry/fsimpl/kernfs/kernfs.go
+++ b/pkg/sentry/fsimpl/kernfs/kernfs.go
@@ -328,10 +328,6 @@ type inodeRefs interface {
 	IncRef()
 	DecRef(ctx context.Context)
 	TryIncRef() bool
-	// Destroy is called when the inode reaches zero references. Destroy release
-	// all resources (references) on objects referenced by the inode, including
-	// any child dentries.
-	Destroy(ctx context.Context)
 }
 
 type inodeMetadata interface {
diff --git a/pkg/sentry/fsimpl/tmpfs/inode_refs.go b/pkg/sentry/fsimpl/tmpfs/inode_refs.go
index 8b7ff185f..3245ede1f 100644
--- a/pkg/sentry/fsimpl/tmpfs/inode_refs.go
+++ b/pkg/sentry/fsimpl/tmpfs/inode_refs.go
@@ -1,11 +1,11 @@
 package tmpfs
 
 import (
-	"runtime"
 	"sync/atomic"
 
 	"gvisor.dev/gvisor/pkg/log"
 	refs_vfs1 "gvisor.dev/gvisor/pkg/refs"
+	"runtime"
 )
 
 // ownerType is used to customize logging. Note that we use a pointer to T so
diff --git a/pkg/sentry/platform/ring0/defs_impl_arm64.go b/pkg/sentry/platform/ring0/defs_impl_arm64.go
index eda1e1484..424b66f76 100644
--- a/pkg/sentry/platform/ring0/defs_impl_arm64.go
+++ b/pkg/sentry/platform/ring0/defs_impl_arm64.go
@@ -1,13 +1,13 @@
 package ring0
 
 import (
-	"fmt"
 	"gvisor.dev/gvisor/pkg/sentry/arch"
 	"gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables"
-	"io"
-	"reflect"
 
+	"fmt"
 	"gvisor.dev/gvisor/pkg/usermem"
+	"io"
+	"reflect"
 )
 
 // Useful bits.
diff --git a/pkg/sentry/socket/unix/socket_refs.go b/pkg/sentry/socket/unix/socket_refs.go
index 4c6ec186b..6ed7b1151 100644
--- a/pkg/sentry/socket/unix/socket_refs.go
+++ b/pkg/sentry/socket/unix/socket_refs.go
@@ -1,11 +1,11 @@
 package unix
 
 import (
-	"runtime"
 	"sync/atomic"
 
 	"gvisor.dev/gvisor/pkg/log"
 	refs_vfs1 "gvisor.dev/gvisor/pkg/refs"
+	"runtime"
 )
 
 // ownerType is used to customize logging. Note that we use a pointer to T so