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/* 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 */
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