From 24df85ffb9712cd6060588f6e08defcda5986efe Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 31 Oct 2025 13:16:03 -0400 Subject: [PATCH] allow to use CLASS() for struct filename * Not all users match that model, but most of them do. By the end of the series we'll be left with very few irregular ones... Added: CLASS(filename, name)(user_path) => getname(user_path) CLASS(filename_kernel, name)(string) => getname_kernel(string) CLASS(filename_flags, name)(user_path, flags) => getname_flags(user_path, flags) CLASS(filename_uflags, name)(user_path, flags) => getname_uflags(user_path, flags) CLASS(filename_maybe_null, name)(user_path, flags) => getname_maybe_null(user_path, flags) all with putname() as destructor. "flags" in filename_flags is in LOOKUP_... space, only LOOKUP_EMPTY matters. "flags" in filename_uflags and filename_maybe_null is in AT_...... space, and only AT_EMPTY_PATH matters. filename_flags conventions might be worth reconsidering later (it might or might not be better off with boolean instead) Signed-off-by: Al Viro --- include/linux/fs.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index f5c9cf28c4dc..d49b969ab432 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2517,6 +2517,12 @@ static inline struct filename *refname(struct filename *name) return name; } +DEFINE_CLASS(filename, struct filename *, putname(_T), getname(p), const char __user *p) +EXTEND_CLASS(filename, _kernel, getname_kernel(p), const char *p) +EXTEND_CLASS(filename, _flags, getname_flags(p, f), const char __user *p, unsigned int f) +EXTEND_CLASS(filename, _uflags, getname_uflags(p, f), const char __user *p, unsigned int f) +EXTEND_CLASS(filename, _maybe_null, getname_maybe_null(p, f), const char __user *p, unsigned int f) + extern int finish_open(struct file *file, struct dentry *dentry, int (*open)(struct inode *, struct file *)); extern int finish_no_open(struct file *file, struct dentry *dentry);