CoCalc -- samples-vfs.h

GitHub Repository: torvalds/linux
Path: blob/master/samples/vfs/samples-vfs.h
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __SAMPLES_VFS_H
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#define __SAMPLES_VFS_H
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#include <errno.h>
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#include <linux/types.h>
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#include <sys/ioctl.h>
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#include <sys/syscall.h>
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#define die_errno(format, ...)                                             \
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	do {                                                               \
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		fprintf(stderr, "%m | %s: %d: %s: " format "\n", __FILE__, \
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			__LINE__, __func__, ##__VA_ARGS__);                \
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		exit(EXIT_FAILURE);                                        \
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	} while (0)
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struct statmount {
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	__u32 size;		/* Total size, including strings */
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	__u32 mnt_opts;		/* [str] Options (comma separated, escaped) */
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	__u64 mask;		/* What results were written */
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	__u32 sb_dev_major;	/* Device ID */
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	__u32 sb_dev_minor;
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	__u64 sb_magic;		/* ..._SUPER_MAGIC */
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	__u32 sb_flags;		/* SB_{RDONLY,SYNCHRONOUS,DIRSYNC,LAZYTIME} */
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	__u32 fs_type;		/* [str] Filesystem type */
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	__u64 mnt_id;		/* Unique ID of mount */
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	__u64 mnt_parent_id;	/* Unique ID of parent (for root == mnt_id) */
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	__u32 mnt_id_old;	/* Reused IDs used in proc/.../mountinfo */
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	__u32 mnt_parent_id_old;
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	__u64 mnt_attr;		/* MOUNT_ATTR_... */
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	__u64 mnt_propagation;	/* MS_{SHARED,SLAVE,PRIVATE,UNBINDABLE} */
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	__u64 mnt_peer_group;	/* ID of shared peer group */
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	__u64 mnt_master;	/* Mount receives propagation from this ID */
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	__u64 propagate_from;	/* Propagation from in current namespace */
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	__u32 mnt_root;		/* [str] Root of mount relative to root of fs */
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	__u32 mnt_point;	/* [str] Mountpoint relative to current root */
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	__u64 mnt_ns_id;	/* ID of the mount namespace */
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	__u32 fs_subtype;	/* [str] Subtype of fs_type (if any) */
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	__u32 sb_source;	/* [str] Source string of the mount */
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	__u32 opt_num;		/* Number of fs options */
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	__u32 opt_array;	/* [str] Array of nul terminated fs options */
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	__u32 opt_sec_num;	/* Number of security options */
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	__u32 opt_sec_array;	/* [str] Array of nul terminated security options */
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	__u32 mnt_uidmap_num;	/* Number of uid mappings */
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	__u32 mnt_uidmap;	/* [str] Array of uid mappings */
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	__u32 mnt_gidmap_num;	/* Number of gid mappings */
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	__u32 mnt_gidmap;	/* [str] Array of gid mappings */
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	__u64 __spare2[44];
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	char str[];		/* Variable size part containing strings */
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};
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struct mnt_id_req {
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	__u32 size;
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	__u32 spare;
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	__u64 mnt_id;
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	__u64 param;
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	__u64 mnt_ns_id;
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};
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#ifndef MNT_ID_REQ_SIZE_VER0
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#define MNT_ID_REQ_SIZE_VER0	24 /* sizeof first published struct */
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#endif
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#ifndef MNT_ID_REQ_SIZE_VER1
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#define MNT_ID_REQ_SIZE_VER1	32 /* sizeof second published struct */
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#endif
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/* Get the id for a mount namespace */
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#ifndef NS_GET_MNTNS_ID
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#define NS_GET_MNTNS_ID _IO(0xb7, 0x5)
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#endif
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struct mnt_ns_info {
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	__u32 size;
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	__u32 nr_mounts;
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	__u64 mnt_ns_id;
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};
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#ifndef MNT_NS_INFO_SIZE_VER0
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#define MNT_NS_INFO_SIZE_VER0 16 /* size of first published struct */
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#endif
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#ifndef NS_MNT_GET_INFO
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#define NS_MNT_GET_INFO _IOR(0xb7, 10, struct mnt_ns_info)
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#endif
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#ifndef NS_MNT_GET_NEXT
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#define NS_MNT_GET_NEXT _IOR(0xb7, 11, struct mnt_ns_info)
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#endif
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#ifndef NS_MNT_GET_PREV
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#define NS_MNT_GET_PREV _IOR(0xb7, 12, struct mnt_ns_info)
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#endif
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#ifndef PIDFD_GET_MNT_NAMESPACE
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#define PIDFD_GET_MNT_NAMESPACE _IO(0xFF, 3)
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#endif
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#ifndef __NR_listmount
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#define __NR_listmount 458
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#endif
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#ifndef __NR_statmount
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#define __NR_statmount 457
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#endif
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#ifndef LSMT_ROOT
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#define LSMT_ROOT		0xffffffffffffffff	/* root mount */
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#endif
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/* @mask bits for statmount(2) */
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#ifndef STATMOUNT_SB_BASIC
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#define STATMOUNT_SB_BASIC		0x00000001U /* Want/got sb_... */
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#endif
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#ifndef STATMOUNT_MNT_BASIC
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#define STATMOUNT_MNT_BASIC		0x00000002U /* Want/got mnt_... */
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#endif
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#ifndef STATMOUNT_PROPAGATE_FROM
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#define STATMOUNT_PROPAGATE_FROM	0x00000004U /* Want/got propagate_from */
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#endif
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#ifndef STATMOUNT_MNT_ROOT
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#define STATMOUNT_MNT_ROOT		0x00000008U /* Want/got mnt_root  */
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#endif
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#ifndef STATMOUNT_MNT_POINT
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#define STATMOUNT_MNT_POINT		0x00000010U /* Want/got mnt_point */
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#endif
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#ifndef STATMOUNT_FS_TYPE
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#define STATMOUNT_FS_TYPE		0x00000020U /* Want/got fs_type */
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#endif
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#ifndef STATMOUNT_MNT_NS_ID
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#define STATMOUNT_MNT_NS_ID		0x00000040U /* Want/got mnt_ns_id */
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#endif
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#ifndef STATMOUNT_MNT_OPTS
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#define STATMOUNT_MNT_OPTS		0x00000080U /* Want/got mnt_opts */
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#endif
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#ifndef STATMOUNT_FS_SUBTYPE
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#define STATMOUNT_FS_SUBTYPE		0x00000100U /* Want/got fs_subtype */
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#endif
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#ifndef STATMOUNT_SB_SOURCE
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#define STATMOUNT_SB_SOURCE		0x00000200U /* Want/got sb_source */
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#endif
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#ifndef STATMOUNT_OPT_ARRAY
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#define STATMOUNT_OPT_ARRAY		0x00000400U /* Want/got opt_... */
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#endif
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#ifndef STATMOUNT_OPT_SEC_ARRAY
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#define STATMOUNT_OPT_SEC_ARRAY		0x00000800U /* Want/got opt_sec... */
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#endif
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#ifndef STATX_MNT_ID_UNIQUE
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#define STATX_MNT_ID_UNIQUE 0x00004000U /* Want/got extended stx_mount_id */
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#endif
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#ifndef STATMOUNT_MNT_UIDMAP
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#define STATMOUNT_MNT_UIDMAP		0x00002000U	/* Want/got uidmap... */
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#endif
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#ifndef STATMOUNT_MNT_GIDMAP
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#define STATMOUNT_MNT_GIDMAP		0x00004000U	/* Want/got gidmap... */
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#endif
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#ifndef MOUNT_ATTR_RDONLY
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#define MOUNT_ATTR_RDONLY	0x00000001 /* Mount read-only */
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#endif
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#ifndef MOUNT_ATTR_NOSUID
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#define MOUNT_ATTR_NOSUID	0x00000002 /* Ignore suid and sgid bits */
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#endif
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#ifndef MOUNT_ATTR_NODEV
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#define MOUNT_ATTR_NODEV	0x00000004 /* Disallow access to device special files */
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#endif
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#ifndef MOUNT_ATTR_NOEXEC
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#define MOUNT_ATTR_NOEXEC	0x00000008 /* Disallow program execution */
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#endif
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#ifndef MOUNT_ATTR__ATIME
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#define MOUNT_ATTR__ATIME	0x00000070 /* Setting on how atime should be updated */
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#endif
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#ifndef MOUNT_ATTR_RELATIME
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#define MOUNT_ATTR_RELATIME	0x00000000 /* - Update atime relative to mtime/ctime. */
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#endif
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#ifndef MOUNT_ATTR_NOATIME
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#define MOUNT_ATTR_NOATIME	0x00000010 /* - Do not update access times. */
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#endif
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#ifndef MOUNT_ATTR_STRICTATIME
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#define MOUNT_ATTR_STRICTATIME	0x00000020 /* - Always perform atime updates */
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#endif
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#ifndef MOUNT_ATTR_NODIRATIME
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#define MOUNT_ATTR_NODIRATIME	0x00000080 /* Do not update directory access times */
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#endif
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#ifndef MOUNT_ATTR_IDMAP
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#define MOUNT_ATTR_IDMAP	0x00100000 /* Idmap mount to @userns_fd in struct mount_attr. */
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#endif
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#ifndef MOUNT_ATTR_NOSYMFOLLOW
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#define MOUNT_ATTR_NOSYMFOLLOW	0x00200000 /* Do not follow symlinks */
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#endif
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#ifndef MS_RDONLY
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#define MS_RDONLY	 1	/* Mount read-only */
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#endif
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#ifndef MS_SYNCHRONOUS
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#define MS_SYNCHRONOUS	16	/* Writes are synced at once */
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#endif
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#ifndef MS_MANDLOCK
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#define MS_MANDLOCK	64	/* Allow mandatory locks on an FS */
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#endif
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#ifndef MS_DIRSYNC
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#define MS_DIRSYNC	128	/* Directory modifications are synchronous */
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#endif
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#ifndef MS_UNBINDABLE
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#define MS_UNBINDABLE	(1<<17)	/* change to unbindable */
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#endif
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#ifndef MS_PRIVATE
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#define MS_PRIVATE	(1<<18)	/* change to private */
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#endif
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#ifndef MS_SLAVE
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#define MS_SLAVE	(1<<19)	/* change to slave */
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#endif
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#ifndef MS_SHARED
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#define MS_SHARED	(1<<20)	/* change to shared */
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#endif
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#ifndef MS_LAZYTIME
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#define MS_LAZYTIME	(1<<25) /* Update the on-disk [acm]times lazily */
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#endif
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#endif /* __SAMPLES_VFS_H */
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