From ed1c5e4a9f5ce1921f3ec03b32e591ce828ec5b9 Mon Sep 17 00:00:00 2001
From: Aleksey Vasenev
Date: Sun, 17 Nov 2024 23:14:36 +0300
Subject: Xattrs support in reverse mode

Fixes https://github.com/rfjakob/gocryptfs/issues/827
---
 internal/fusefrontend_reverse/node_xattr_linux.go | 40 +++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 internal/fusefrontend_reverse/node_xattr_linux.go

(limited to 'internal/fusefrontend_reverse/node_xattr_linux.go')

diff --git a/internal/fusefrontend_reverse/node_xattr_linux.go b/internal/fusefrontend_reverse/node_xattr_linux.go
new file mode 100644
index 0000000..f6d04a5
--- /dev/null
+++ b/internal/fusefrontend_reverse/node_xattr_linux.go
@@ -0,0 +1,40 @@
+package fusefrontend_reverse
+
+import (
+	"fmt"
+	"syscall"
+
+	"github.com/hanwen/go-fuse/v2/fs"
+
+	"github.com/rfjakob/gocryptfs/v2/internal/syscallcompat"
+)
+
+func (n *Node) getXAttr(cAttr string) (out []byte, errno syscall.Errno) {
+	d, errno := n.prepareAtSyscall("")
+	if errno != 0 {
+		return
+	}
+	defer syscall.Close(d.dirfd)
+
+	procPath := fmt.Sprintf("/proc/self/fd/%d/%s", d.dirfd, d.pName)
+	pData, err := syscallcompat.Lgetxattr(procPath, cAttr)
+	if err != nil {
+		return nil, fs.ToErrno(err)
+	}
+	return pData, 0
+}
+
+func (n *Node) listXAttr() (out []string, errno syscall.Errno) {
+	d, errno := n.prepareAtSyscall("")
+	if errno != 0 {
+		return
+	}
+	defer syscall.Close(d.dirfd)
+
+	procPath := fmt.Sprintf("/proc/self/fd/%d/%s", d.dirfd, d.pName)
+	pNames, err := syscallcompat.Llistxattr(procPath)
+	if err != nil {
+		return nil, fs.ToErrno(err)
+	}
+	return pNames, 0
+}
-- 
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