include: import linux/nsfs.h from kernel v7.0.0~rc1

diff --git a/src/include/uapi/linux/nsfs.h b/src/include/uapi/linux/nsfs.h
new file mode 100644 (file)
index 0000000..a25e38d
--- /dev/null
+++ b/src/include/uapi/linux/nsfs.h
@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef __LINUX_NSFS_H
+#define __LINUX_NSFS_H
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+#define NSIO   0xb7
+
+/* Returns a file descriptor that refers to an owning user namespace */
+#define NS_GET_USERNS          _IO(NSIO, 0x1)
+/* Returns a file descriptor that refers to a parent namespace */
+#define NS_GET_PARENT          _IO(NSIO, 0x2)
+/* Returns the type of namespace (CLONE_NEW* value) referred to by
+   file descriptor */
+#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)
+/* 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. */
+#define NS_GET_TGID_FROM_PIDNS _IOR(NSIO, 0x7, int)
+/* Translate pid from caller's pid namespace into a target pid namespace. */
+#define NS_GET_PID_IN_PIDNS    _IOR(NSIO, 0x8, int)
+/* Return thread-group leader id of pid in the target pid namespace. */
+#define NS_GET_TGID_IN_PIDNS   _IOR(NSIO, 0x9, int)
+
+struct mnt_ns_info {
+       __u32 size;
+       __u32 nr_mounts;
+       __u64 mnt_ns_id;
+};
+
+#define MNT_NS_INFO_SIZE_VER0 16 /* size of first published struct */
+
+/* Get information about namespace. */
+#define NS_MNT_GET_INFO                _IOR(NSIO, 10, struct mnt_ns_info)
+/* Get next namespace. */
+#define NS_MNT_GET_NEXT                _IOR(NSIO, 11, 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,
+       USER_NS_INIT_INO        = 0xEFFFFFFDU,
+       PID_NS_INIT_INO         = 0xEFFFFFFCU,
+       CGROUP_NS_INIT_INO      = 0xEFFFFFFBU,
+       TIME_NS_INIT_INO        = 0xEFFFFFFAU,
+       NET_NS_INIT_INO         = 0xEFFFFFF9U,
+       MNT_NS_INIT_INO         = 0xEFFFFFF8U,
+#ifdef __KERNEL__
+       MNT_NS_ANON_INO         = 0xEFFFFFF7U,
+#endif
+};
+
+struct nsfs_file_handle {
+       __u64 ns_id;
+       __u32 ns_type;
+       __u32 ns_inum;
+};
+
+#define NSFS_FILE_HANDLE_SIZE_VER0 16 /* sizeof first published struct */
+#define NSFS_FILE_HANDLE_SIZE_LATEST sizeof(struct nsfs_file_handle) /* sizeof latest published struct */
+
+enum init_ns_id {
+       IPC_NS_INIT_ID          = 1ULL,
+       UTS_NS_INIT_ID          = 2ULL,
+       USER_NS_INIT_ID         = 3ULL,
+       PID_NS_INIT_ID          = 4ULL,
+       CGROUP_NS_INIT_ID       = 5ULL,
+       TIME_NS_INIT_ID         = 6ULL,
+       NET_NS_INIT_ID          = 7ULL,
+       MNT_NS_INIT_ID          = 8ULL,
+#ifdef __KERNEL__
+       NS_LAST_INIT_ID         = MNT_NS_INIT_ID,
+#endif
+};
+
+enum ns_type {
+       TIME_NS    = (1ULL << 7),  /* CLONE_NEWTIME */
+       MNT_NS     = (1ULL << 17), /* CLONE_NEWNS */
+       CGROUP_NS  = (1ULL << 25), /* CLONE_NEWCGROUP */
+       UTS_NS     = (1ULL << 26), /* CLONE_NEWUTS */
+       IPC_NS     = (1ULL << 27), /* CLONE_NEWIPC */
+       USER_NS    = (1ULL << 28), /* CLONE_NEWUSER */
+       PID_NS     = (1ULL << 29), /* CLONE_NEWPID */
+       NET_NS     = (1ULL << 30), /* CLONE_NEWNET */
+};
+
+/**
+ * struct ns_id_req - namespace ID request structure
+ * @size: size of this structure
+ * @spare: reserved for future use
+ * @filter: filter mask
+ * @ns_id: last namespace id
+ * @user_ns_id: owning user namespace ID
+ *
+ * Structure for passing namespace ID and miscellaneous parameters to
+ * statns(2) and listns(2).
+ *
+ * For statns(2) @param represents the request mask.
+ * For listns(2) @param represents the last listed mount id (or zero).
+ */
+struct ns_id_req {
+       __u32 size;
+       __u32 spare;
+       __u64 ns_id;
+       struct /* listns */ {
+               __u32 ns_type;
+               __u32 spare2;
+               __u64 user_ns_id;
+       };
+};
+
+/*
+ * Special @user_ns_id value that can be passed to listns()
+ */
+#define LISTNS_CURRENT_USER 0xffffffffffffffff /* Caller's userns */
+
+/* List of all ns_id_req versions. */
+#define NS_ID_REQ_SIZE_VER0 32 /* sizeof first published struct */
+
+#endif /* __LINUX_NSFS_H */