diff --git a/pkg/p9/p9.go b/pkg/p9/p9.go
index d06949fabf..6dc76a8a5f 100644
--- a/pkg/p9/p9.go
+++ b/pkg/p9/p9.go
@@ -130,9 +130,6 @@ func (o OpenFlags) String() string {
 	return buf.String()
 }
 
-// Tag is a message tag.
-type Tag uint16
-
 // FileMode are flags corresponding to file modes.
 //
 // These correspond to bits sent over the wire.
@@ -569,137 +566,6 @@ func StatToAttr(s *syscall.Stat_t, req AttrMask) (Attr, AttrMask) {
 	return attr, req
 }
 
-// SetAttrMask specifies a valid mask for setattr.
-type SetAttrMask struct {
-	Permissions        bool
-	UID                bool
-	GID                bool
-	Size               bool
-	ATime              bool
-	MTime              bool
-	CTime              bool
-	ATimeNotSystemTime bool
-	MTimeNotSystemTime bool
-}
-
-// IsSubsetOf returns whether s is a subset of m.
-func (s SetAttrMask) IsSubsetOf(m SetAttrMask) bool {
-	sb := s.bitmask()
-	sm := m.bitmask()
-	return sm|sb == sm
-}
-
-// String implements fmt.Stringer.
-func (s SetAttrMask) String() string {
-	var masks []string
-	if s.Permissions {
-		masks = append(masks, "Permissions")
-	}
-	if s.UID {
-		masks = append(masks, "UID")
-	}
-	if s.GID {
-		masks = append(masks, "GID")
-	}
-	if s.Size {
-		masks = append(masks, "Size")
-	}
-	if s.ATime {
-		masks = append(masks, "ATime")
-	}
-	if s.MTime {
-		masks = append(masks, "MTime")
-	}
-	if s.CTime {
-		masks = append(masks, "CTime")
-	}
-	if s.ATimeNotSystemTime {
-		masks = append(masks, "ATimeNotSystemTime")
-	}
-	if s.MTimeNotSystemTime {
-		masks = append(masks, "MTimeNotSystemTime")
-	}
-	return fmt.Sprintf("SetAttrMask{with: %s}", strings.Join(masks, " "))
-}
-
-// Empty returns true if no fields are masked.
-func (s SetAttrMask) Empty() bool {
-	return !s.Permissions && !s.UID && !s.GID && !s.Size && !s.ATime && !s.MTime && !s.CTime && !s.ATimeNotSystemTime && !s.MTimeNotSystemTime
-}
-
-func (s SetAttrMask) bitmask() uint32 {
-	var mask uint32
-	if s.Permissions {
-		mask |= 0x00000001
-	}
-	if s.UID {
-		mask |= 0x00000002
-	}
-	if s.GID {
-		mask |= 0x00000004
-	}
-	if s.Size {
-		mask |= 0x00000008
-	}
-	if s.ATime {
-		mask |= 0x00000010
-	}
-	if s.MTime {
-		mask |= 0x00000020
-	}
-	if s.CTime {
-		mask |= 0x00000040
-	}
-	if s.ATimeNotSystemTime {
-		mask |= 0x00000080
-	}
-	if s.MTimeNotSystemTime {
-		mask |= 0x00000100
-	}
-	return mask
-}
-
-// SetAttr specifies a set of attributes for a setattr.
-type SetAttr struct {
-	Permissions      FileMode
-	UID              UID
-	GID              GID
-	Size             uint64
-	ATimeSeconds     uint64
-	ATimeNanoSeconds uint64
-	MTimeSeconds     uint64
-	MTimeNanoSeconds uint64
-}
-
-// String implements fmt.Stringer.
-func (s SetAttr) String() string {
-	return fmt.Sprintf("SetAttr{Permissions: 0o%o, UID: %d, GID: %d, Size: %d, ATime: {Sec: %d, NanoSec: %d}, MTime: {Sec: %d, NanoSec: %d}}", s.Permissions, s.UID, s.GID, s.Size, s.ATimeSeconds, s.ATimeNanoSeconds, s.MTimeSeconds, s.MTimeNanoSeconds)
-}
-
-// Apply applies this to the given Attr.
-func (a *Attr) Apply(mask SetAttrMask, attr SetAttr) {
-	if mask.Permissions {
-		a.Mode = a.Mode&^permissionsMask | (attr.Permissions & permissionsMask)
-	}
-	if mask.UID {
-		a.UID = attr.UID
-	}
-	if mask.GID {
-		a.GID = attr.GID
-	}
-	if mask.Size {
-		a.Size = attr.Size
-	}
-	if mask.ATime {
-		a.ATimeSeconds = attr.ATimeSeconds
-		a.ATimeNanoSeconds = attr.ATimeNanoSeconds
-	}
-	if mask.MTime {
-		a.MTimeSeconds = attr.MTimeSeconds
-		a.MTimeNanoSeconds = attr.MTimeNanoSeconds
-	}
-}
-
 // AllocateMode are possible modes to p9.File.Allocate().
 type AllocateMode struct {
 	KeepSize      bool