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Diffstat (limited to 'samples/vfs/samples-vfs.h')
| -rw-r--r-- | samples/vfs/samples-vfs.h | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/samples/vfs/samples-vfs.h b/samples/vfs/samples-vfs.h new file mode 100644 index 000000000000..103e1e7c4cec --- /dev/null +++ b/samples/vfs/samples-vfs.h @@ -0,0 +1,241 @@ +/* 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 */ + __u64 __spare2[46]; + 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 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 */ |