root_test: add TestOverlay ; syscallcompat: add QuirkNoUserXattr

2 files changed, 6 insertions, 0 deletions

diff --git a/internal/syscallcompat/quirks.go b/internal/syscallcompat/quirks.go
index 110c00d..858f16d 100644
--- a/internal/syscallcompat/quirks.go
+++ b/internal/syscallcompat/quirks.go
@@ -13,6 +13,8 @@ const (
 	// On MacOS ExFAT, all empty files share inode number 1:
 	// https://github.com/rfjakob/gocryptfs/issues/585
 	QuirkDuplicateIno1
+	// QuirkNoUserXattr means that user.* xattrs are not supported
+	QuirkNoUserXattr
 )
 
 func logQuirk(s string) {
diff --git a/internal/syscallcompat/quirks_linux.go b/internal/syscallcompat/quirks_linux.go
index bcdcf07..5ef2d8a 100644
--- a/internal/syscallcompat/quirks_linux.go
+++ b/internal/syscallcompat/quirks_linux.go
@@ -27,5 +27,9 @@ func DetectQuirks(cipherdir string) (q uint64) {
 		q |= QuirkBrokenFalloc
 	}
 
+	if uint32(st.Type) == unix.TMPFS_MAGIC {
+		logQuirk("tmpfs detected, no extended attributes except acls will work.")
+	}
+
 	return q
 }