Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/include/linux/posix_acl_xattr.h b/include/linux/posix_acl_xattr.h
new file mode 100644
index 000000000..e86f3b731
--- /dev/null
+++ b/include/linux/posix_acl_xattr.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+  File: linux/posix_acl_xattr.h
+
+  Extended attribute system call representation of Access Control Lists.
+
+  Copyright (C) 2000 by Andreas Gruenbacher <a.gruenbacher@computer.org>
+  Copyright (C) 2002 SGI - Silicon Graphics, Inc <linux-xfs@oss.sgi.com>
+ */
+#ifndef _POSIX_ACL_XATTR_H
+#define _POSIX_ACL_XATTR_H
+
+#include <uapi/linux/xattr.h>
+#include <uapi/linux/posix_acl_xattr.h>
+#include <linux/posix_acl.h>
+
+static inline size_t
+posix_acl_xattr_size(int count)
+{
+	return (sizeof(struct posix_acl_xattr_header) +
+		(count * sizeof(struct posix_acl_xattr_entry)));
+}
+
+static inline int
+posix_acl_xattr_count(size_t size)
+{
+	if (size < sizeof(struct posix_acl_xattr_header))
+		return -1;
+	size -= sizeof(struct posix_acl_xattr_header);
+	if (size % sizeof(struct posix_acl_xattr_entry))
+		return -1;
+	return size / sizeof(struct posix_acl_xattr_entry);
+}
+
+#ifdef CONFIG_FS_POSIX_ACL
+struct posix_acl *posix_acl_from_xattr(struct user_namespace *user_ns,
+				       const void *value, size_t size);
+#else
+static inline struct posix_acl *
+posix_acl_from_xattr(struct user_namespace *user_ns, const void *value,
+		     size_t size)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+#endif
+
+int posix_acl_to_xattr(struct user_namespace *user_ns,
+		       const struct posix_acl *acl, void *buffer, size_t size);
+static inline const char *posix_acl_xattr_name(int type)
+{
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		return XATTR_NAME_POSIX_ACL_ACCESS;
+	case ACL_TYPE_DEFAULT:
+		return XATTR_NAME_POSIX_ACL_DEFAULT;
+	}
+
+	return "";
+}
+
+static inline int posix_acl_type(const char *name)
+{
+	if (strcmp(name, XATTR_NAME_POSIX_ACL_ACCESS) == 0)
+		return ACL_TYPE_ACCESS;
+	else if (strcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT) == 0)
+		return ACL_TYPE_DEFAULT;
+
+	return -1;
+}
+
+/* These are legacy handlers. Don't use them for new code. */
+extern const struct xattr_handler nop_posix_acl_access;
+extern const struct xattr_handler nop_posix_acl_default;
+
+#endif	/* _POSIX_ACL_XATTR_H */