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nsfs: add missing id retrieval support

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The mount namespace has supported id retrieval for a while already.
Add support for the other types as well.

Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2025-09-12 13:52:53 +02:00
parent e83f0b5d10
commit f861225b9e
2 changed files with 17 additions and 14 deletions
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6
include/uapi/linux/nsfs.h
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@@ -16,8 +16,6 @@
#define NS_GET_NSTYPE _IO(NSIO, 0x3)
/* Get owner UID (in the caller's user namespace) for a user namespace */
#define NS_GET_OWNER_UID _IO(NSIO, 0x4)
/* Get the id for a mount namespace */
#define NS_GET_MNTNS_ID _IOR(NSIO, 0x5, __u64)
/* Translate pid from target pid namespace into the caller's pid namespace. */
#define NS_GET_PID_FROM_PIDNS _IOR(NSIO, 0x6, int)
/* Return thread-group leader id of pid in the callers pid namespace. */
@@ -42,6 +40,10 @@ struct mnt_ns_info {
/* Get previous namespace. */
#define NS_MNT_GET_PREV _IOR(NSIO, 12, struct mnt_ns_info)
/* Retrieve namespace identifiers. */
#define NS_GET_MNTNS_ID _IOR(NSIO, 5, __u64)
#define NS_GET_ID _IOR(NSIO, 13, __u64)
enum init_ns_ino {
IPC_NS_INIT_INO = 0xEFFFFFFFU,
UTS_NS_INIT_INO = 0xEFFFFFFEU,