[RFC PATCH 03/41] uidgid: add uid_is_legacy() and gid_is_legacy()
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WARM2d
From: Jan Koester <hidden>
Date: 2026-10-18 18:01:37
Also in:
keyrings, linux-arch, linux-cifs, linux-ext4, linux-fsdevel, linux-nfs, linux-security-module, lkml, netdev
Subsystem:
the rest · Maintainer:
Linus Torvalds
User and group ids are about to become able to hold a UUID or a GUID besides a classic 32 bit id. Add the predicates code that can only keep a classic id (in 32 bits of a buffer, for instance) tests with, so it can be converted before the types change. For now every id is a classic one. No functional change. Assisted-by: Claude:claude-opus-5-5 Signed-off-by: Jan Koester <redacted> --- include/linux/uidgid.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/include/linux/uidgid.h b/include/linux/uidgid.h
index 2dc767e08f..182c682458 100644
--- a/include/linux/uidgid.h
+++ b/include/linux/uidgid.h@@ -22,6 +22,20 @@ struct uid_gid_map; #define KUIDT_INIT(value) (kuid_t){ value } #define KGIDT_INIT(value) (kgid_t){ value } +/* + * Whether an id is a classic 32 bit id. All of them are for now; code that + * needs one (to store it in 32 bits, for example) checks with these. + */ +static inline bool uid_is_legacy(kuid_t uid) +{ + return true; +} + +static inline bool gid_is_legacy(kgid_t gid) +{ + return true; +} + #ifdef CONFIG_MULTIUSER static inline uid_t __kuid_val(kuid_t uid) {
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2.56.0