samples/vfs/samples-vfs.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 */

 #ifndef __SAMPLES_VFS_H
 #define __SAMPLES_VFS_H

 #include <errno.h>
 #include <linux/types.h>
 #include <sys/ioctl.h>
 #include <sys/syscall.h>

 #define die_errno(format, ...)                                             \
 	do {                                                               \
 		fprintf(stderr, "%m | %s: %d: %s: " format "\n", __FILE__, \
 			__LINE__, __func__, ##__VA_ARGS__);                \
 		exit(EXIT_FAILURE);                                        \
 	} while (0)

 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 */
 	__u32 mnt_uidmap_num;	/* Number of uid mappings */
 	__u32 mnt_uidmap;	/* [str] Array of uid mappings */
 	__u32 mnt_gidmap_num;	/* Number of gid mappings */
 	__u32 mnt_gidmap;	/* [str] Array of gid mappings */
 	__u64 __spare2[44];
 	char str[];		/* Variable size part containing strings */
 };

 struct mnt_id_req {
 	__u32 size;
 	__u32 spare;
 	__u64 mnt_id;
 	__u64 param;
 	__u64 mnt_ns_id;
 };

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

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

 /* Get the id for a mount namespace */
 #ifndef NS_GET_MNTNS_ID
 #define NS_GET_MNTNS_ID _IO(0xb7, 0x5)
 #endif

 struct mnt_ns_info {
 	__u32 size;
 	__u32 nr_mounts;
 	__u64 mnt_ns_id;
 };

 #ifndef MNT_NS_INFO_SIZE_VER0
 #define MNT_NS_INFO_SIZE_VER0 16 /* size of first published struct */
 #endif

 #ifndef NS_MNT_GET_INFO
 #define NS_MNT_GET_INFO _IOR(0xb7, 10, struct mnt_ns_info)
 #endif

 #ifndef NS_MNT_GET_NEXT
 #define NS_MNT_GET_NEXT _IOR(0xb7, 11, struct mnt_ns_info)
 #endif

 #ifndef NS_MNT_GET_PREV
 #define NS_MNT_GET_PREV _IOR(0xb7, 12, struct mnt_ns_info)
 #endif

 #ifndef PIDFD_GET_MNT_NAMESPACE
 #define PIDFD_GET_MNT_NAMESPACE _IO(0xFF, 3)
 #endif

 #ifndef __NR_listmount
 #define __NR_listmount 458
 #endif

 #ifndef __NR_statmount
 #define __NR_statmount 457
 #endif

 #ifndef LSMT_ROOT
 #define LSMT_ROOT		0xffffffffffffffff	/* root mount */
 #endif

 /* @mask bits for statmount(2) */
 #ifndef STATMOUNT_SB_BASIC
 #define STATMOUNT_SB_BASIC		0x00000001U /* Want/got sb_... */
 #endif

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

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

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

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

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

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

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

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

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

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

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

 #ifndef STATX_MNT_ID_UNIQUE
 #define STATX_MNT_ID_UNIQUE 0x00004000U /* Want/got extended stx_mount_id */
 #endif

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

 #endif /* __SAMPLES_VFS_H */
	/* SPDX-License-Identifier: GPL-2.0 */

	#ifndef __SAMPLES_VFS_H
	#define __SAMPLES_VFS_H

	#include <errno.h>
	#include <linux/types.h>
	#include <sys/ioctl.h>
	#include <sys/syscall.h>

	#define die_errno(format, ...) \
	do { \
	fprintf(stderr, "%m \| %s: %d: %s: " format "\n", __FILE__, \
	__LINE__, __func__, ##__VA_ARGS__); \
	exit(EXIT_FAILURE); \
	} while (0)

	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 */
	__u32 mnt_uidmap_num; /* Number of uid mappings */
	__u32 mnt_uidmap; /* [str] Array of uid mappings */
	__u32 mnt_gidmap_num; /* Number of gid mappings */
	__u32 mnt_gidmap; /* [str] Array of gid mappings */
	__u64 __spare2[44];
	char str[]; /* Variable size part containing strings */
	};

	struct mnt_id_req {
	__u32 size;
	__u32 spare;
	__u64 mnt_id;
	__u64 param;
	__u64 mnt_ns_id;
	};

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

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

	/* Get the id for a mount namespace */
	#ifndef NS_GET_MNTNS_ID
	#define NS_GET_MNTNS_ID _IO(0xb7, 0x5)
	#endif

	struct mnt_ns_info {
	__u32 size;
	__u32 nr_mounts;
	__u64 mnt_ns_id;
	};

	#ifndef MNT_NS_INFO_SIZE_VER0
	#define MNT_NS_INFO_SIZE_VER0 16 /* size of first published struct */
	#endif

	#ifndef NS_MNT_GET_INFO
	#define NS_MNT_GET_INFO _IOR(0xb7, 10, struct mnt_ns_info)
	#endif

	#ifndef NS_MNT_GET_NEXT
	#define NS_MNT_GET_NEXT _IOR(0xb7, 11, struct mnt_ns_info)
	#endif

	#ifndef NS_MNT_GET_PREV
	#define NS_MNT_GET_PREV _IOR(0xb7, 12, struct mnt_ns_info)
	#endif

	#ifndef PIDFD_GET_MNT_NAMESPACE
	#define PIDFD_GET_MNT_NAMESPACE _IO(0xFF, 3)
	#endif

	#ifndef __NR_listmount
	#define __NR_listmount 458
	#endif

	#ifndef __NR_statmount
	#define __NR_statmount 457
	#endif

	#ifndef LSMT_ROOT
	#define LSMT_ROOT 0xffffffffffffffff /* root mount */
	#endif

	/* @mask bits for statmount(2) */
	#ifndef STATMOUNT_SB_BASIC
	#define STATMOUNT_SB_BASIC 0x00000001U /* Want/got sb_... */
	#endif

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

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

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

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

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

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

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

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

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

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

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

	#ifndef STATX_MNT_ID_UNIQUE
	#define STATX_MNT_ID_UNIQUE 0x00004000U /* Want/got extended stx_mount_id */
	#endif

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	#endif /* __SAMPLES_VFS_H */