Merge tag 'vfs-6.16-rc1.selftests' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

#ifndef _UAPI_LINUX_FANOTIFY_H

#define _UAPI_LINUX_FANOTIFY_H

#include <linux/types.h>

/* the following events that user-space can register for */

#define FAN_ACCESS		0x00000001	/* File was accessed */

#define FAN_MODIFY		0x00000002	/* File was modified */

#define FAN_ATTRIB		0x00000004	/* Metadata changed */

#define FAN_CLOSE_WRITE		0x00000008	/* Writable file closed */

#define FAN_CLOSE_NOWRITE	0x00000010	/* Unwritable file closed */

#define FAN_OPEN		0x00000020	/* File was opened */

#define FAN_MOVED_FROM		0x00000040	/* File was moved from X */

#define FAN_MOVED_TO		0x00000080	/* File was moved to Y */

#define FAN_CREATE		0x00000100	/* Subfile was created */

#define FAN_DELETE		0x00000200	/* Subfile was deleted */

#define FAN_DELETE_SELF		0x00000400	/* Self was deleted */

#define FAN_MOVE_SELF		0x00000800	/* Self was moved */

#define FAN_OPEN_EXEC		0x00001000	/* File was opened for exec */

#define FAN_Q_OVERFLOW		0x00004000	/* Event queued overflowed */

#define FAN_FS_ERROR		0x00008000	/* Filesystem error */

#define FAN_OPEN_PERM		0x00010000	/* File open in perm check */

#define FAN_ACCESS_PERM		0x00020000	/* File accessed in perm check */

#define FAN_OPEN_EXEC_PERM	0x00040000	/* File open/exec in perm check */

/* #define FAN_DIR_MODIFY	0x00080000 */	/* Deprecated (reserved) */

#define FAN_PRE_ACCESS		0x00100000	/* Pre-content access hook */

#define FAN_MNT_ATTACH		0x01000000	/* Mount was attached */

#define FAN_MNT_DETACH		0x02000000	/* Mount was detached */

#define FAN_EVENT_ON_CHILD	0x08000000	/* Interested in child events */

#define FAN_RENAME		0x10000000	/* File was renamed */

#define FAN_ONDIR		0x40000000	/* Event occurred against dir */

/* helper events */

#define FAN_CLOSE		(FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */

#define FAN_MOVE		(FAN_MOVED_FROM | FAN_MOVED_TO) /* moves */

/* flags used for fanotify_init() */

#define FAN_CLOEXEC		0x00000001

#define FAN_NONBLOCK		0x00000002

/* These are NOT bitwise flags.  Both bits are used together.  */

#define FAN_CLASS_NOTIF		0x00000000

#define FAN_CLASS_CONTENT	0x00000004

#define FAN_CLASS_PRE_CONTENT	0x00000008

/* Deprecated - do not use this in programs and do not add new flags here! */

#define FAN_ALL_CLASS_BITS	(FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \

				 FAN_CLASS_PRE_CONTENT)

#define FAN_UNLIMITED_QUEUE	0x00000010

#define FAN_UNLIMITED_MARKS	0x00000020

#define FAN_ENABLE_AUDIT	0x00000040

/* Flags to determine fanotify event format */

#define FAN_REPORT_PIDFD	0x00000080	/* Report pidfd for event->pid */

#define FAN_REPORT_TID		0x00000100	/* event->pid is thread id */

#define FAN_REPORT_FID		0x00000200	/* Report unique file id */

#define FAN_REPORT_DIR_FID	0x00000400	/* Report unique directory id */

#define FAN_REPORT_NAME		0x00000800	/* Report events with name */

#define FAN_REPORT_TARGET_FID	0x00001000	/* Report dirent target id  */

#define FAN_REPORT_FD_ERROR	0x00002000	/* event->fd can report error */

#define FAN_REPORT_MNT		0x00004000	/* Report mount events */

/* Convenience macro - FAN_REPORT_NAME requires FAN_REPORT_DIR_FID */

#define FAN_REPORT_DFID_NAME	(FAN_REPORT_DIR_FID | FAN_REPORT_NAME)

/* Convenience macro - FAN_REPORT_TARGET_FID requires all other FID flags */

#define FAN_REPORT_DFID_NAME_TARGET (FAN_REPORT_DFID_NAME | \

				     FAN_REPORT_FID | FAN_REPORT_TARGET_FID)

/* Deprecated - do not use this in programs and do not add new flags here! */

#define FAN_ALL_INIT_FLAGS	(FAN_CLOEXEC | FAN_NONBLOCK | \

				 FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE |\

				 FAN_UNLIMITED_MARKS)

/* flags used for fanotify_modify_mark() */

#define FAN_MARK_ADD		0x00000001

#define FAN_MARK_REMOVE		0x00000002

#define FAN_MARK_DONT_FOLLOW	0x00000004

#define FAN_MARK_ONLYDIR	0x00000008

/* FAN_MARK_MOUNT is		0x00000010 */

#define FAN_MARK_IGNORED_MASK	0x00000020

#define FAN_MARK_IGNORED_SURV_MODIFY	0x00000040

#define FAN_MARK_FLUSH		0x00000080

/* FAN_MARK_FILESYSTEM is	0x00000100 */

#define FAN_MARK_EVICTABLE	0x00000200

/* This bit is mutually exclusive with FAN_MARK_IGNORED_MASK bit */

#define FAN_MARK_IGNORE		0x00000400

/* These are NOT bitwise flags.  Both bits can be used togther.  */

#define FAN_MARK_INODE		0x00000000

#define FAN_MARK_MOUNT		0x00000010

#define FAN_MARK_FILESYSTEM	0x00000100

#define FAN_MARK_MNTNS		0x00000110

/*

 * Convenience macro - FAN_MARK_IGNORE requires FAN_MARK_IGNORED_SURV_MODIFY

 * for non-inode mark types.

 */

#define FAN_MARK_IGNORE_SURV	(FAN_MARK_IGNORE | FAN_MARK_IGNORED_SURV_MODIFY)

/* Deprecated - do not use this in programs and do not add new flags here! */

#define FAN_ALL_MARK_FLAGS	(FAN_MARK_ADD |\

				 FAN_MARK_REMOVE |\

				 FAN_MARK_DONT_FOLLOW |\

				 FAN_MARK_ONLYDIR |\

				 FAN_MARK_MOUNT |\

				 FAN_MARK_IGNORED_MASK |\

				 FAN_MARK_IGNORED_SURV_MODIFY |\

				 FAN_MARK_FLUSH)

/* Deprecated - do not use this in programs and do not add new flags here! */

#define FAN_ALL_EVENTS (FAN_ACCESS |\

			FAN_MODIFY |\

			FAN_CLOSE |\

			FAN_OPEN)

/*

 * All events which require a permission response from userspace

 */

/* Deprecated - do not use this in programs and do not add new flags here! */

#define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\

			     FAN_ACCESS_PERM)

/* Deprecated - do not use this in programs and do not add new flags here! */

#define FAN_ALL_OUTGOING_EVENTS	(FAN_ALL_EVENTS |\

				 FAN_ALL_PERM_EVENTS |\

				 FAN_Q_OVERFLOW)

#define FANOTIFY_METADATA_VERSION	3

struct fanotify_event_metadata {

	__u32 event_len;

	__u8 vers;

	__u8 reserved;

	__u16 metadata_len;

	__aligned_u64 mask;

	__s32 fd;

	__s32 pid;

};

#define FAN_EVENT_INFO_TYPE_FID		1

#define FAN_EVENT_INFO_TYPE_DFID_NAME	2

#define FAN_EVENT_INFO_TYPE_DFID	3

#define FAN_EVENT_INFO_TYPE_PIDFD	4

#define FAN_EVENT_INFO_TYPE_ERROR	5

#define FAN_EVENT_INFO_TYPE_RANGE	6

#define FAN_EVENT_INFO_TYPE_MNT		7

/* Special info types for FAN_RENAME */

#define FAN_EVENT_INFO_TYPE_OLD_DFID_NAME	10

/* Reserved for FAN_EVENT_INFO_TYPE_OLD_DFID	11 */

#define FAN_EVENT_INFO_TYPE_NEW_DFID_NAME	12

/* Reserved for FAN_EVENT_INFO_TYPE_NEW_DFID	13 */

/* Variable length info record following event metadata */

struct fanotify_event_info_header {

	__u8 info_type;

	__u8 pad;

	__u16 len;

};

/*

 * Unique file identifier info record.

 * This structure is used for records of types FAN_EVENT_INFO_TYPE_FID,

 * FAN_EVENT_INFO_TYPE_DFID and FAN_EVENT_INFO_TYPE_DFID_NAME.

 * For FAN_EVENT_INFO_TYPE_DFID_NAME there is additionally a null terminated

 * name immediately after the file handle.

 */

struct fanotify_event_info_fid {

	struct fanotify_event_info_header hdr;

	__kernel_fsid_t fsid;

	/*

	 * Following is an opaque struct file_handle that can be passed as

	 * an argument to open_by_handle_at(2).

	 */

	unsigned char handle[];

};

/*

 * This structure is used for info records of type FAN_EVENT_INFO_TYPE_PIDFD.

 * It holds a pidfd for the pid that was responsible for generating an event.

 */

struct fanotify_event_info_pidfd {

	struct fanotify_event_info_header hdr;

	__s32 pidfd;

};

struct fanotify_event_info_error {

	struct fanotify_event_info_header hdr;

	__s32 error;

	__u32 error_count;

};

struct fanotify_event_info_range {

	struct fanotify_event_info_header hdr;

	__u32 pad;

	__u64 offset;

	__u64 count;

};

struct fanotify_event_info_mnt {

	struct fanotify_event_info_header hdr;

	__u64 mnt_id;

};

/*

 * User space may need to record additional information about its decision.

 * The extra information type records what kind of information is included.

 * The default is none. We also define an extra information buffer whose

 * size is determined by the extra information type.

 *

 * If the information type is Audit Rule, then the information following

 * is the rule number that triggered the user space decision that

 * requires auditing.

 */

#define FAN_RESPONSE_INFO_NONE		0

#define FAN_RESPONSE_INFO_AUDIT_RULE	1

struct fanotify_response {

	__s32 fd;

	__u32 response;

};

struct fanotify_response_info_header {

	__u8 type;

	__u8 pad;

	__u16 len;

};

struct fanotify_response_info_audit_rule {

	struct fanotify_response_info_header hdr;

	__u32 rule_number;

	__u32 subj_trust;

	__u32 obj_trust;

};

/* Legit userspace responses to a _PERM event */

#define FAN_ALLOW	0x01

#define FAN_DENY	0x02

/* errno other than EPERM can specified in upper byte of deny response */

#define FAN_ERRNO_BITS	8

#define FAN_ERRNO_SHIFT (32 - FAN_ERRNO_BITS)

#define FAN_ERRNO_MASK	((1 << FAN_ERRNO_BITS) - 1)

#define FAN_DENY_ERRNO(err) \

	(FAN_DENY | ((((__u32)(err)) & FAN_ERRNO_MASK) << FAN_ERRNO_SHIFT))

#define FAN_AUDIT	0x10	/* Bitmask to create audit record for result */

#define FAN_INFO	0x20	/* Bitmask to indicate additional information */

/* No fd set in event */

#define FAN_NOFD	-1

#define FAN_NOPIDFD	FAN_NOFD

#define FAN_EPIDFD	-2

/* Helper functions to deal with fanotify_event_metadata buffers */

#define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))

#define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \

				   (struct fanotify_event_metadata*)(((char *)(meta)) + \

				   (meta)->event_len))

#define FAN_EVENT_OK(meta, len)	((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \

				(long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \

				(long)(meta)->event_len <= (long)(len))

#endif /* _UAPI_LINUX_FANOTIFY_H */

#ifndef _UAPI_LINUX_MOUNT_H

#define _UAPI_LINUX_MOUNT_H

#include <linux/types.h>

/*

 * These are the fs-independent mount-flags: up to 32 flags are supported

 *

 * Usage of these is restricted within the kernel to core mount(2) code and

 * callers of sys_mount() only.  Filesystems should be using the SB_*

 * equivalent instead.

 */

#define MS_RDONLY	 1	/* Mount read-only */

#define MS_NOSUID	 2	/* Ignore suid and sgid bits */

#define MS_NODEV	 4	/* Disallow access to device special files */

#define MS_NOEXEC	 8	/* Disallow program execution */

#define MS_SYNCHRONOUS	16	/* Writes are synced at once */

#define MS_REMOUNT	32	/* Alter flags of a mounted FS */

#define MS_MANDLOCK	64	/* Allow mandatory locks on an FS */

#define MS_DIRSYNC	128	/* Directory modifications are synchronous */

#define MS_NOSYMFOLLOW	256	/* Do not follow symlinks */

#define MS_NOATIME	1024	/* Do not update access times. */

#define MS_NODIRATIME	2048	/* Do not update directory access times */

#define MS_BIND		4096

#define MS_MOVE		8192

#define MS_REC		16384

#define MS_VERBOSE	32768	/* War is peace. Verbosity is silence.

				   MS_VERBOSE is deprecated. */

#define MS_SILENT	32768

#define MS_POSIXACL	(1<<16)	/* VFS does not apply the umask */

#define MS_UNBINDABLE	(1<<17)	/* change to unbindable */

#define MS_PRIVATE	(1<<18)	/* change to private */

#define MS_SLAVE	(1<<19)	/* change to slave */

#define MS_SHARED	(1<<20)	/* change to shared */

#define MS_RELATIME	(1<<21)	/* Update atime relative to mtime/ctime. */

#define MS_KERNMOUNT	(1<<22) /* this is a kern_mount call */

#define MS_I_VERSION	(1<<23) /* Update inode I_version field */

#define MS_STRICTATIME	(1<<24) /* Always perform atime updates */

#define MS_LAZYTIME	(1<<25) /* Update the on-disk [acm]times lazily */

/* These sb flags are internal to the kernel */

#define MS_SUBMOUNT     (1<<26)

#define MS_NOREMOTELOCK	(1<<27)

#define MS_NOSEC	(1<<28)

#define MS_BORN		(1<<29)

#define MS_ACTIVE	(1<<30)

#define MS_NOUSER	(1<<31)

/*

 * Superblock flags that can be altered by MS_REMOUNT

 */

#define MS_RMT_MASK	(MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\

			 MS_LAZYTIME)

/*

 * Old magic mount flag and mask

 */

#define MS_MGC_VAL 0xC0ED0000

#define MS_MGC_MSK 0xffff0000

/*

 * open_tree() flags.

 */

#define OPEN_TREE_CLONE		1		/* Clone the target tree and attach the clone */

#define OPEN_TREE_CLOEXEC	O_CLOEXEC	/* Close the file on execve() */

/*

 * move_mount() flags.

 */

#define MOVE_MOUNT_F_SYMLINKS		0x00000001 /* Follow symlinks on from path */

#define MOVE_MOUNT_F_AUTOMOUNTS		0x00000002 /* Follow automounts on from path */

#define MOVE_MOUNT_F_EMPTY_PATH		0x00000004 /* Empty from path permitted */

#define MOVE_MOUNT_T_SYMLINKS		0x00000010 /* Follow symlinks on to path */

#define MOVE_MOUNT_T_AUTOMOUNTS		0x00000020 /* Follow automounts on to path */

#define MOVE_MOUNT_T_EMPTY_PATH		0x00000040 /* Empty to path permitted */

#define MOVE_MOUNT_SET_GROUP		0x00000100 /* Set sharing group instead */

#define MOVE_MOUNT_BENEATH		0x00000200 /* Mount beneath top mount */

#define MOVE_MOUNT__MASK		0x00000377

/*

 * fsopen() flags.

 */

#define FSOPEN_CLOEXEC		0x00000001

/*

 * fspick() flags.

 */

#define FSPICK_CLOEXEC		0x00000001

#define FSPICK_SYMLINK_NOFOLLOW	0x00000002

#define FSPICK_NO_AUTOMOUNT	0x00000004

#define FSPICK_EMPTY_PATH	0x00000008

/*

 * The type of fsconfig() call made.

 */

enum fsconfig_command {

	FSCONFIG_SET_FLAG	= 0,	/* Set parameter, supplying no value */

	FSCONFIG_SET_STRING	= 1,	/* Set parameter, supplying a string value */

	FSCONFIG_SET_BINARY	= 2,	/* Set parameter, supplying a binary blob value */

	FSCONFIG_SET_PATH	= 3,	/* Set parameter, supplying an object by path */

	FSCONFIG_SET_PATH_EMPTY	= 4,	/* Set parameter, supplying an object by (empty) path */

	FSCONFIG_SET_FD		= 5,	/* Set parameter, supplying an object by fd */

	FSCONFIG_CMD_CREATE	= 6,	/* Create new or reuse existing superblock */

	FSCONFIG_CMD_RECONFIGURE = 7,	/* Invoke superblock reconfiguration */

	FSCONFIG_CMD_CREATE_EXCL = 8,	/* Create new superblock, fail if reusing existing superblock */

};

/*

 * fsmount() flags.

 */

#define FSMOUNT_CLOEXEC		0x00000001

/*

 * Mount attributes.

 */

#define MOUNT_ATTR_RDONLY	0x00000001 /* Mount read-only */

#define MOUNT_ATTR_NOSUID	0x00000002 /* Ignore suid and sgid bits */

#define MOUNT_ATTR_NODEV	0x00000004 /* Disallow access to device special files */

#define MOUNT_ATTR_NOEXEC	0x00000008 /* Disallow program execution */

#define MOUNT_ATTR__ATIME	0x00000070 /* Setting on how atime should be updated */

#define MOUNT_ATTR_RELATIME	0x00000000 /* - Update atime relative to mtime/ctime. */

#define MOUNT_ATTR_NOATIME	0x00000010 /* - Do not update access times. */

#define MOUNT_ATTR_STRICTATIME	0x00000020 /* - Always perform atime updates */

#define MOUNT_ATTR_NODIRATIME	0x00000080 /* Do not update directory access times */

#define MOUNT_ATTR_IDMAP	0x00100000 /* Idmap mount to @userns_fd in struct mount_attr. */

#define MOUNT_ATTR_NOSYMFOLLOW	0x00200000 /* Do not follow symlinks */

/*

 * mount_setattr()

 */

struct mount_attr {

	__u64 attr_set;

	__u64 attr_clr;

	__u64 propagation;

	__u64 userns_fd;

};

/* List of all mount_attr versions. */

#define MOUNT_ATTR_SIZE_VER0	32 /* sizeof first published struct */

/*

 * Structure for getting mount/superblock/filesystem info with statmount(2).

 *

 * The interface is similar to statx(2): individual fields or groups can be

 * selected with the @mask argument of statmount().  Kernel will set the @mask

 * field according to the supported fields.

 *

 * If string fields are selected, then the caller needs to pass a buffer that

 * has space after the fixed part of the structure.  Nul terminated strings are

 * copied there and offsets relative to @str are stored in the relevant fields.

 * If the buffer is too small, then EOVERFLOW is returned.  The actually used

 * size is returned in @size.

 */

struct statmount {

	__u32 size;		/* Total size, including strings */

	__u32 mnt_opts;		/* [str] Options (comma separated, escaped) */

	__u64 mask;		/* What results were written */

	__u32 sb_dev_major;	/* Device ID */

	__u32 sb_dev_minor;

	__u64 sb_magic;		/* ..._SUPER_MAGIC */

	__u32 sb_flags;		/* SB_{RDONLY,SYNCHRONOUS,DIRSYNC,LAZYTIME} */

	__u32 fs_type;		/* [str] Filesystem type */

	__u64 mnt_id;		/* Unique ID of mount */

	__u64 mnt_parent_id;	/* Unique ID of parent (for root == mnt_id) */

	__u32 mnt_id_old;	/* Reused IDs used in proc/.../mountinfo */

	__u32 mnt_parent_id_old;

	__u64 mnt_attr;		/* MOUNT_ATTR_... */

	__u64 mnt_propagation;	/* MS_{SHARED,SLAVE,PRIVATE,UNBINDABLE} */

	__u64 mnt_peer_group;	/* ID of shared peer group */

	__u64 mnt_master;	/* Mount receives propagation from this ID */

	__u64 propagate_from;	/* Propagation from in current namespace */

	__u32 mnt_root;		/* [str] Root of mount relative to root of fs */

	__u32 mnt_point;	/* [str] Mountpoint relative to current root */

	__u64 mnt_ns_id;	/* ID of the mount namespace */

	__u32 fs_subtype;	/* [str] Subtype of fs_type (if any) */

	__u32 sb_source;	/* [str] Source string of the mount */

	__u32 opt_num;		/* Number of fs options */

	__u32 opt_array;	/* [str] Array of nul terminated fs options */

	__u32 opt_sec_num;	/* Number of security options */

	__u32 opt_sec_array;	/* [str] Array of nul terminated security options */

	__u64 supported_mask;	/* Mask flags that this kernel supports */

	__u32 mnt_uidmap_num;	/* Number of uid mappings */

	__u32 mnt_uidmap;	/* [str] Array of uid mappings (as seen from callers namespace) */

	__u32 mnt_gidmap_num;	/* Number of gid mappings */

	__u32 mnt_gidmap;	/* [str] Array of gid mappings (as seen from callers namespace) */

	__u64 __spare2[43];

	char str[];		/* Variable size part containing strings */

};

/*

 * Structure for passing mount ID and miscellaneous parameters to statmount(2)

 * and listmount(2).

 *

 * For statmount(2) @param represents the request mask.

 * For listmount(2) @param represents the last listed mount id (or zero).

 */

struct mnt_id_req {

	__u32 size;

	__u32 spare;

	__u64 mnt_id;

	__u64 param;

	__u64 mnt_ns_id;

};

/* List of all mnt_id_req versions. */

#define MNT_ID_REQ_SIZE_VER0	24 /* sizeof first published struct */

#define MNT_ID_REQ_SIZE_VER1	32 /* sizeof second published struct */

/*

 * @mask bits for statmount(2)

 */

#define STATMOUNT_SB_BASIC		0x00000001U     /* Want/got sb_... */

#define STATMOUNT_MNT_BASIC		0x00000002U	/* Want/got mnt_... */

#define STATMOUNT_PROPAGATE_FROM	0x00000004U	/* Want/got propagate_from */

#define STATMOUNT_MNT_ROOT		0x00000008U	/* Want/got mnt_root  */

#define STATMOUNT_MNT_POINT		0x00000010U	/* Want/got mnt_point */

#define STATMOUNT_FS_TYPE		0x00000020U	/* Want/got fs_type */

#define STATMOUNT_MNT_NS_ID		0x00000040U	/* Want/got mnt_ns_id */

#define STATMOUNT_MNT_OPTS		0x00000080U	/* Want/got mnt_opts */

#define STATMOUNT_FS_SUBTYPE		0x00000100U	/* Want/got fs_subtype */

#define STATMOUNT_SB_SOURCE		0x00000200U	/* Want/got sb_source */

#define STATMOUNT_OPT_ARRAY		0x00000400U	/* Want/got opt_... */

#define STATMOUNT_OPT_SEC_ARRAY		0x00000800U	/* Want/got opt_sec... */

#define STATMOUNT_SUPPORTED_MASK	0x00001000U	/* Want/got supported mask flags */

#define STATMOUNT_MNT_UIDMAP		0x00002000U	/* Want/got uidmap... */

#define STATMOUNT_MNT_GIDMAP		0x00004000U	/* Want/got gidmap... */

/*

 * Special @mnt_id values that can be passed to listmount

 */

#define LSMT_ROOT		0xffffffffffffffff	/* root mount */

#define LISTMOUNT_REVERSE	(1 << 0) /* List later mounts first */

#endif /* _UAPI_LINUX_MOUNT_H */

/* 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)

/* 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. */

#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)

#endif /* __LINUX_NSFS_H */

# SPDX-License-Identifier: GPL-2.0-only

/*_test

/*_test_ns

# SPDX-License-Identifier: GPL-2.0-or-later

CFLAGS += -Wall -O2 -g $(KHDR_INCLUDES)

TEST_GEN_PROGS := mount-notify_test

CFLAGS += -Wall -O2 -g $(KHDR_INCLUDES) $(TOOLS_INCLUDES)

LDLIBS += -lcap

TEST_GEN_PROGS := mount-notify_test mount-notify_test_ns

include ../../lib.mk

$(OUTPUT)/mount-notify_test: ../utils.c

$(OUTPUT)/mount-notify_test_ns: ../utils.c