1 files changed, 81 insertions, 0 deletions
diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c
new file mode 100644
index 00000000000..43762197fb0
--- /dev/null
+++ b/fs/reiserfs/xattr_trusted.c
@@ -0,0 +1,81 @@
+#include <linux/reiserfs_fs.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/xattr.h>
+#include <linux/reiserfs_xattr.h>
+#include <asm/uaccess.h>
+
+#define XATTR_TRUSTED_PREFIX "trusted."
+
+static int
+trusted_get (struct inode *inode, const char *name, void *buffer, size_t size)
+{
+    if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
+        return -EINVAL;
+
+    if (!reiserfs_xattrs (inode->i_sb))
+        return -EOPNOTSUPP;
+
+    if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+        return -EPERM;
+
+    return reiserfs_xattr_get (inode, name, buffer, size);
+}
+
+static int
+trusted_set (struct inode *inode, const char *name, const void *buffer,
+          size_t size, int flags)
+{
+    if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
+        return -EINVAL;
+
+    if (!reiserfs_xattrs (inode->i_sb))
+        return -EOPNOTSUPP;
+
+    if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+        return -EPERM;
+
+    return reiserfs_xattr_set (inode, name, buffer, size, flags);
+}
+
+static int
+trusted_del (struct inode *inode, const char *name)
+{
+    if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
+        return -EINVAL;
+
+    if (!reiserfs_xattrs (inode->i_sb))
+        return -EOPNOTSUPP;
+
+    if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+        return -EPERM;
+
+    return 0;
+}
+
+static int
+trusted_list (struct inode *inode, const char *name, int namelen, char *out)
+{
+    int len = namelen;
+
+    if (!reiserfs_xattrs (inode->i_sb))
+        return 0;
+
+    if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+        return 0;
+
+    if (out)
+        memcpy (out, name, len);
+
+    return len;
+}
+
+
+struct reiserfs_xattr_handler trusted_handler = {
+	.prefix = XATTR_TRUSTED_PREFIX,
+	.get = trusted_get,
+	.set = trusted_set,
+	.del = trusted_del,
+	.list = trusted_list,
+};