ꦫꦣꦺꦤ꧀ꦄꦤ꧀ꦠꦱꦺꦤ

PATH: usr / include / linux

/*
 *  include/linux/userfaultfd.h
 *
 *  Copyright (C) 2007  Davide Libenzi <davidel@xmailserver.org>
 *  Copyright (C) 2015  Red Hat, Inc.
 *
 */

#ifndef _LINUX_USERFAULTFD_H
#define _LINUX_USERFAULTFD_H

#include <linux/types.h>

/*
 * If the UFFDIO_API is upgraded someday, the UFFDIO_UNREGISTER and
 * UFFDIO_WAKE ioctls should be defined as _IOW and not as _IOR.  In
 * userfaultfd.h we assumed the kernel was reading (instead _IOC_READ
 * means the userland is reading).
 */
#define UFFD_API ((__u64)0xAA)
#define UFFD_API_FEATURES (UFFD_FEATURE_EVENT_FORK |		\
			   UFFD_FEATURE_EVENT_REMAP |		\
			   UFFD_FEATURE_EVENT_REMOVE |	\
			   UFFD_FEATURE_EVENT_UNMAP |		\
			   UFFD_FEATURE_MISSING_HUGETLBFS |	\
			   UFFD_FEATURE_MISSING_SHMEM |		\
			   UFFD_FEATURE_SIGBUS |		\
			   UFFD_FEATURE_THREAD_ID)
#define UFFD_API_IOCTLS				\
	((__u64)1 << _UFFDIO_REGISTER |		\
	 (__u64)1 << _UFFDIO_UNREGISTER |	\
	 (__u64)1 << _UFFDIO_API)
#define UFFD_API_RANGE_IOCTLS			\
	((__u64)1 << _UFFDIO_WAKE |		\
	 (__u64)1 << _UFFDIO_COPY |		\
	 (__u64)1 << _UFFDIO_ZEROPAGE)
#define UFFD_API_RANGE_IOCTLS_BASIC		\
	((__u64)1 << _UFFDIO_WAKE |		\
	 (__u64)1 << _UFFDIO_COPY)

/*
 * Valid ioctl command number range with this API is from 0x00 to
 * 0x3F.  UFFDIO_API is the fixed number, everything else can be
 * changed by implementing a different UFFD_API. If sticking to the
 * same UFFD_API more ioctl can be added and userland will be aware of
 * which ioctl the running kernel implements through the ioctl command
 * bitmask written by the UFFDIO_API.
 */
#define _UFFDIO_REGISTER		(0x00)
#define _UFFDIO_UNREGISTER		(0x01)
#define _UFFDIO_WAKE			(0x02)
#define _UFFDIO_COPY			(0x03)
#define _UFFDIO_ZEROPAGE		(0x04)
#define _UFFDIO_API			(0x3F)

/* userfaultfd ioctl ids */
#define UFFDIO 0xAA
#define UFFDIO_API		_IOWR(UFFDIO, _UFFDIO_API,	\
				      struct uffdio_api)
#define UFFDIO_REGISTER		_IOWR(UFFDIO, _UFFDIO_REGISTER, \
				      struct uffdio_register)
#define UFFDIO_UNREGISTER	_IOR(UFFDIO, _UFFDIO_UNREGISTER,	\
				     struct uffdio_range)
#define UFFDIO_WAKE		_IOR(UFFDIO, _UFFDIO_WAKE,	\
				     struct uffdio_range)
#define UFFDIO_COPY		_IOWR(UFFDIO, _UFFDIO_COPY,	\
				      struct uffdio_copy)
#define UFFDIO_ZEROPAGE		_IOWR(UFFDIO, _UFFDIO_ZEROPAGE,	\
				      struct uffdio_zeropage)

/* read() structure */
struct uffd_msg {
	__u8	event;

__u8	reserved1;
	__u16	reserved2;
	__u32	reserved3;

union {
		struct {
			__u64	flags;
			__u64	address;
			union {
				__u32 ptid;
			} feat;
		} pagefault;

struct {
			__u32	ufd;
		} fork;

struct {
			__u64	from;
			__u64	to;
			__u64	len;
		} remap;

struct {
			__u64	start;
			__u64	end;
		} remove;

struct {
			/* unused reserved fields */
			__u64	reserved1;
			__u64	reserved2;
			__u64	reserved3;
		} reserved;
	} arg;
} __attribute__((packed));

/*
 * Start at 0x12 and not at 0 to be more strict against bugs.
 */
#define UFFD_EVENT_PAGEFAULT	0x12
#define UFFD_EVENT_FORK		0x13
#define UFFD_EVENT_REMAP	0x14
#define UFFD_EVENT_REMOVE	0x15
#define UFFD_EVENT_UNMAP	0x16

/* flags for UFFD_EVENT_PAGEFAULT */
#define UFFD_PAGEFAULT_FLAG_WRITE	(1<<0)	/* If this was a write fault */
#define UFFD_PAGEFAULT_FLAG_WP		(1<<1)	/* If reason is VM_UFFD_WP */

struct uffdio_api {
	/* userland asks for an API number and the features to enable */
	__u64 api;
	/*
	 * Kernel answers below with the all available features for
	 * the API, this notifies userland of which events and/or
	 * which flags for each event are enabled in the current
	 * kernel.
	 *
	 * Note: UFFD_EVENT_PAGEFAULT and UFFD_PAGEFAULT_FLAG_WRITE
	 * are to be considered implicitly always enabled in all kernels as
	 * long as the uffdio_api.api requested matches UFFD_API.
	 *
	 * UFFD_FEATURE_MISSING_HUGETLBFS means an UFFDIO_REGISTER
	 * with UFFDIO_REGISTER_MODE_MISSING mode will succeed on
	 * hugetlbfs virtual memory ranges. Adding or not adding
	 * UFFD_FEATURE_MISSING_HUGETLBFS to uffdio_api.features has
	 * no real functional effect after UFFDIO_API returns, but
	 * it's only useful for an initial feature set probe at
	 * UFFDIO_API time. There are two ways to use it:
	 *
	 * 1) by adding UFFD_FEATURE_MISSING_HUGETLBFS to the
	 *    uffdio_api.features before calling UFFDIO_API, an error
	 *    will be returned by UFFDIO_API on a kernel without
	 *    hugetlbfs missing support
	 *
	 * 2) the UFFD_FEATURE_MISSING_HUGETLBFS can not be added in
	 *    uffdio_api.features and instead it will be set by the
	 *    kernel in the uffdio_api.features if the kernel supports
	 *    it, so userland can later check if the feature flag is
	 *    present in uffdio_api.features after UFFDIO_API
	 *    succeeded.
	 *
	 * UFFD_FEATURE_MISSING_SHMEM works the same as
	 * UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem
	 * (i.e. tmpfs and other shmem based APIs).
	 *
	 * UFFD_FEATURE_SIGBUS feature means no page-fault
	 * (UFFD_EVENT_PAGEFAULT) event will be delivered, instead
	 * a SIGBUS signal will be sent to the faulting process.
	 *
	 * UFFD_FEATURE_THREAD_ID pid of the page faulted task_struct will
	 * be returned, if feature is not requested 0 will be returned.
	 */
#define UFFD_FEATURE_PAGEFAULT_FLAG_WP		(1<<0)
#define UFFD_FEATURE_EVENT_FORK			(1<<1)
#define UFFD_FEATURE_EVENT_REMAP		(1<<2)
#define UFFD_FEATURE_EVENT_REMOVE		(1<<3)
#define UFFD_FEATURE_MISSING_HUGETLBFS		(1<<4)
#define UFFD_FEATURE_MISSING_SHMEM		(1<<5)
#define UFFD_FEATURE_EVENT_UNMAP		(1<<6)
#define UFFD_FEATURE_SIGBUS			(1<<7)
#define UFFD_FEATURE_THREAD_ID			(1<<8)
	__u64 features;

__u64 ioctls;
};

struct uffdio_range {
	__u64 start;
	__u64 len;
};

struct uffdio_register {
	struct uffdio_range range;
#define UFFDIO_REGISTER_MODE_MISSING	((__u64)1<<0)
#define UFFDIO_REGISTER_MODE_WP		((__u64)1<<1)
	__u64 mode;

/*
	 * kernel answers which ioctl commands are available for the
	 * range, keep at the end as the last 8 bytes aren't read.
	 */
	__u64 ioctls;
};

struct uffdio_copy {
	__u64 dst;
	__u64 src;
	__u64 len;
	/*
	 * There will be a wrprotection flag later that allows to map
	 * pages wrprotected on the fly. And such a flag will be
	 * available if the wrprotection ioctl are implemented for the
	 * range according to the uffdio_register.ioctls.
	 */
#define UFFDIO_COPY_MODE_DONTWAKE		((__u64)1<<0)
	__u64 mode;

/*
	 * "copy" is written by the ioctl and must be at the end: the
	 * copy_from_user will not read the last 8 bytes.
	 */
	__s64 copy;
};

struct uffdio_zeropage {
	struct uffdio_range range;
#define UFFDIO_ZEROPAGE_MODE_DONTWAKE		((__u64)1<<0)
	__u64 mode;

/*
	 * "zeropage" is written by the ioctl and must be at the end:
	 * the copy_from_user will not read the last 8 bytes.
	 */
	__s64 zeropage;
};

#endif /* _LINUX_USERFAULTFD_H */

[+] ..
[-] sysinfo.h [edit]
[-] mroute.h [edit]
[-] if_eql.h [edit]
[-] serial_core.h [edit]
[-] membarrier.h [edit]
[-] sched.h [edit]
[-] mei.h [edit]
[-] bfs_fs.h [edit]
[-] atmlec.h [edit]
[-] v4l2-mediabus.h [edit]
[-] videodev2.h [edit]
[-] screen_info.h [edit]
[-] if_slip.h [edit]
[-] uuid.h [edit]
[-] version.h [edit]
[-] ipv6_route.h [edit]
[-] ixjuser.h [edit]
[-] pkt_cls.h [edit]
[-] atm_he.h [edit]
[-] raw.h [edit]
[-] msdos_fs.h [edit]
[-] mman.h [edit]
[-] aio_abi.h [edit]
[-] reboot.h [edit]
[-] snmp.h [edit]
[-] atm_eni.h [edit]
[-] netfilter_bridge.h [edit]
[-] patchkey.h [edit]
[-] string.h [edit]
[-] socket.h [edit]
[+] spi
[-] auxvec.h [edit]
[-] sockios.h [edit]
[-] keyboard.h [edit]
[-] scc.h [edit]
[-] dn.h [edit]
[-] unistd.h [edit]
[-] oom.h [edit]
[-] pkt_sched.h [edit]
[-] if_phonet.h [edit]
[+] byteorder
[-] if_arcnet.h [edit]
[+] caif
[-] fd.h [edit]
[-] radeonfb.h [edit]
[-] qnx4_fs.h [edit]
[-] nfs2.h [edit]
[-] magic.h [edit]
[-] target_core_user.h [edit]
[-] atm_zatm.h [edit]
[-] pci.h [edit]
[-] nfsacl.h [edit]
[-] if_packet.h [edit]
[-] arcfb.h [edit]
[-] nfs_mount.h [edit]
[-] fib_rules.h [edit]
[-] atmsap.h [edit]
[+] dvb
[-] cciss_defs.h [edit]
[+] netfilter_ipv6
[-] atmdev.h [edit]
[-] kexec.h [edit]
[-] ipc.h [edit]
[-] sock_diag.h [edit]
[+] wimax
[-] serial.h [edit]
[-] if_link.h [edit]
[-] route.h [edit]
[-] if_bonding.h [edit]
[-] auto_fs.h [edit]
[-] pg.h [edit]
[-] l2tp.h [edit]
[-] perf_event.h [edit]
[-] tcp_metrics.h [edit]
[-] v4l2-controls.h [edit]
[-] personality.h [edit]
[-] dcbnl.h [edit]
[-] netfilter_arp.h [edit]
[-] toshiba.h [edit]
[-] memfd.h [edit]
[-] resource.h [edit]
[-] tipc.h [edit]
[-] virtio_vsock.h [edit]
[-] atm_tcp.h [edit]
[-] cn_proc.h [edit]
[-] utime.h [edit]
[-] nbd.h [edit]
[-] netfilter_ipv6.h [edit]
[-] meye.h [edit]
[-] gfs2_ondisk.h [edit]
[-] som.h [edit]
[-] ncp_mount.h [edit]
[-] coda.h [edit]
[-] hw_breakpoint.h [edit]
[-] shm.h [edit]
[-] wanrouter.h [edit]
[-] kernel-page-flags.h [edit]
[-] auto_fs4.h [edit]
[-] ppp_defs.h [edit]
[-] tty.h [edit]
[-] sysctl.h [edit]
[-] joystick.h [edit]
[-] ip.h [edit]
[-] jffs2.h [edit]
[-] nfs3.h [edit]
[-] if_infiniband.h [edit]
[-] agpgart.h [edit]
[+] raid
[-] blkpg.h [edit]
[-] virtio_ids.h [edit]
[-] udp.h [edit]
[-] swab.h [edit]
[-] romfs_fs.h [edit]
[-] fb.h [edit]
[-] kvm_para.h [edit]
[-] btrfs.h [edit]
[-] efs_fs_sb.h [edit]
[-] xfrm.h [edit]
[-] iso_fs.h [edit]
[-] serial_reg.h [edit]
[-] virtio_gpu.h [edit]
[-] sound.h [edit]
[-] errno.h [edit]
[-] kernelcapi.h [edit]
[-] net_tstamp.h [edit]
[-] isdnif.h [edit]
[-] hiddev.h [edit]
[-] ncp_fs.h [edit]
[-] hdlc.h [edit]
[-] fcntl.h [edit]
[-] if.h [edit]
[-] minix_fs.h [edit]
[-] hdreg.h [edit]
[-] virtio_9p.h [edit]
[-] coff.h [edit]
[-] elf-em.h [edit]
[-] mqueue.h [edit]
[+] tc_ematch
[-] gameport.h [edit]
[-] if_ether.h [edit]
[-] if_addrlabel.h [edit]
[-] ife.h [edit]
[-] isdn_divertif.h [edit]
[-] rds.h [edit]
[-] fdreg.h [edit]
[-] pmu.h [edit]
[-] cuda.h [edit]
[-] stat.h [edit]
[-] virtio_net.h [edit]
[-] posix_types.h [edit]
[-] cyclades.h [edit]
[-] baycom.h [edit]
[-] ipv6.h [edit]
[-] net_dropmon.h [edit]
[-] ipmi_msgdefs.h [edit]
[+] netfilter_arp
[-] v4l2-subdev.h [edit]
[-] vsockmon.h [edit]
[-] neighbour.h [edit]
[-] sctp.h [edit]
[-] atmppp.h [edit]
[-] usbdevice_fs.h [edit]
[-] dm-ioctl.h [edit]
[-] netconf.h [edit]
[-] v4l2-dv-timings.h [edit]
[-] chio.h [edit]
[-] msg.h [edit]
[+] netfilter_ipv4
[-] netlink.h [edit]
[-] genetlink.h [edit]
[-] cgroupstats.h [edit]
[-] i8k.h [edit]
[-] cciss_ioctl.h [edit]
[-] major.h [edit]
[-] nfs_fs.h [edit]
[-] rfkill.h [edit]
[-] atm.h [edit]
[-] fuse.h [edit]
[-] fsl_hypervisor.h [edit]
[-] atalk.h [edit]
[-] ivtv.h [edit]
[-] nfs4_mount.h [edit]
[-] pps.h [edit]
[-] nubus.h [edit]
[-] ethtool.h [edit]
[-] hpet.h [edit]
[-] atmmpc.h [edit]
[-] fou.h [edit]
[-] dccp.h [edit]
[-] if_pppox.h [edit]
[-] media.h [edit]
[-] dm-log-userspace.h [edit]
[-] ndctl.h [edit]
[-] wmi.h [edit]
[-] timex.h [edit]
[-] mii.h [edit]
[-] kd.h [edit]
[-] if_pppol2tp.h [edit]
[-] uinput.h [edit]
[-] time.h [edit]
[-] fadvise.h [edit]
[-] phonet.h [edit]
[-] dlm_device.h [edit]
[-] bpf_perf_event.h [edit]
[-] quota.h [edit]
[-] ppdev.h [edit]
[-] ivtvfb.h [edit]
[-] if_plip.h [edit]
[-] net_namespace.h [edit]
[-] ipmi.h [edit]
[-] vhost.h [edit]
[-] v4l2-common.h [edit]
[-] ultrasound.h [edit]
[-] lp.h [edit]
[-] wireless.h [edit]
[-] keyctl.h [edit]
[-] atm_idt77105.h [edit]
[-] bt-bmc.h [edit]
[-] netrom.h [edit]
[-] rtc.h [edit]
[-] types.h [edit]
[-] qnxtypes.h [edit]
[-] affs_hardblocks.h [edit]
[-] if_ppp.h [edit]
[-] prctl.h [edit]
[-] firewire-cdev.h [edit]
[-] sdla.h [edit]
[-] atmbr2684.h [edit]
[-] falloc.h [edit]
[-] connector.h [edit]
[+] mmc
[-] rtnetlink.h [edit]
[-] tty_flags.h [edit]
[-] bpf.h [edit]
[-] watchdog.h [edit]
[-] bsg.h [edit]
[-] kernel.h [edit]
[-] reiserfs_fs.h [edit]
[+] can
[-] selinux_netlink.h [edit]
[-] hdlcdrv.h [edit]
[-] filter.h [edit]
[-] hidraw.h [edit]
[-] icmp.h [edit]
[-] uio.h [edit]
[-] if_ltalk.h [edit]
[-] ppp-ioctl.h [edit]
[-] vtpm_proxy.h [edit]
[-] elfcore.h [edit]
[-] limits.h [edit]
[-] if_tunnel.h [edit]
[-] if_fddi.h [edit]
[-] uvcvideo.h [edit]
[-] ioctl.h [edit]
[-] capi.h [edit]
[-] nvme_ioctl.h [edit]
[-] dlm.h [edit]
[-] tiocl.h [edit]
[-] inotify.h [edit]
[-] poll.h [edit]
[-] rose.h [edit]
[-] if_hippi.h [edit]
[-] matroxfb.h [edit]
[-] i2o-dev.h [edit]
[-] tipc_config.h [edit]
[-] ipsec.h [edit]
[-] dlm_netlink.h [edit]
[-] serio.h [edit]
[-] cdrom.h [edit]
[-] fanotify.h [edit]
[-] virtio_blk.h [edit]
[-] atmioc.h [edit]
[-] securebits.h [edit]
[-] bpf_common.h [edit]
[-] if_team.h [edit]
[-] omapfb.h [edit]
[-] pktcdvd.h [edit]
[-] phantom.h [edit]
[-] atmapi.h [edit]
[-] hyperv.h [edit]
[-] stddef.h [edit]
[-] vt.h [edit]
[-] cycx_cfm.h [edit]
[-] parport.h [edit]
[-] ptrace.h [edit]
[-] nfs.h [edit]
[-] if_bridge.h [edit]
[+] netfilter_bridge
[-] unix_diag.h [edit]
[-] times.h [edit]
[-] n_r3964.h [edit]
[-] nl80211.h [edit]
[-] kvm.h [edit]
[-] virtio_ring.h [edit]
[-] bpqether.h [edit]
[-] ip6_tunnel.h [edit]
[-] sem.h [edit]
[-] llc.h [edit]
[-] omap3isp.h [edit]
[-] virtio_types.h [edit]
[-] xattr.h [edit]
[-] netfilter.h [edit]
[-] edd.h [edit]
[-] inet_diag.h [edit]
[-] vfio.h [edit]
[-] un.h [edit]
[-] termios.h [edit]
[+] usb
[-] firewire-constants.h [edit]
[-] nfs4.h [edit]
[-] atmclip.h [edit]
[-] devlink.h [edit]
[-] ip_vs.h [edit]
[-] nfc.h [edit]
[-] flat.h [edit]
[-] elf.h [edit]
[-] if_x25.h [edit]
[-] mdio.h [edit]
[-] isdn_ppp.h [edit]
[+] isdn
[-] cm4000_cs.h [edit]
[-] nvram.h [edit]
[-] param.h [edit]
[-] dlm_plock.h [edit]
[-] virtio_balloon.h [edit]
[-] telephony.h [edit]
[-] dlmconstants.h [edit]
[-] tcp.h [edit]
[-] futex.h [edit]
[-] virtio_scsi.h [edit]
[-] net.h [edit]
[-] sonypi.h [edit]
[-] wait.h [edit]
[-] apm_bios.h [edit]
[-] if_macsec.h [edit]
[+] hsi
[-] gigaset_dev.h [edit]
[-] capability.h [edit]
[-] errqueue.h [edit]
[+] netfilter
[-] a.out.h [edit]
[-] utsname.h [edit]
[-] gen_stats.h [edit]
[-] kdev_t.h [edit]
[-] if_vlan.h [edit]
[-] lwtunnel.h [edit]
[-] uhid.h [edit]
[-] i2c-dev.h [edit]
[-] wimax.h [edit]
[-] openvswitch.h [edit]
[-] virtio_input.h [edit]
[-] sonet.h [edit]
[+] hdlc
[-] ppp-comp.h [edit]
[-] veth.h [edit]
[-] atmsvc.h [edit]
[-] netlink_diag.h [edit]
[-] hid.h [edit]
[-] const.h [edit]
[-] psample.h [edit]
[-] vm_sockets.h [edit]
[-] i2c.h [edit]
[-] synclink.h [edit]
[-] if_arp.h [edit]
[-] pfkeyv2.h [edit]
[-] virtio_config.h [edit]
[-] if_fc.h [edit]
[-] eventpoll.h [edit]
[-] binfmts.h [edit]
[-] soundcard.h [edit]
[-] in6.h [edit]
[-] b1lli.h [edit]
[-] suspend_ioctls.h [edit]
[-] loop.h [edit]
[-] seccomp.h [edit]
[-] blktrace_api.h [edit]
[-] adfs_fs.h [edit]
[-] netdevice.h [edit]
[-] virtio_console.h [edit]
[-] dqblk_xfs.h [edit]
[-] netfilter_decnet.h [edit]
[-] mmtimer.h [edit]
[-] can.h [edit]
[-] adb.h [edit]
[-] acct.h [edit]
[-] ax25.h [edit]
[-] coda_psdev.h [edit]
[-] elf-fdpic.h [edit]
[-] virtio_rng.h [edit]
[-] signal.h [edit]
[-] libc-compat.h [edit]
[-] taskstats.h [edit]
[-] ncp_no.h [edit]
[-] ipx.h [edit]
[-] userfaultfd.h [edit]
[-] mempolicy.h [edit]
[-] icmpv6.h [edit]
[-] atmarp.h [edit]
[-] if_frad.h [edit]
[-] signalfd.h [edit]
[-] irda.h [edit]
[-] fiemap.h [edit]
[-] virtio_pci.h [edit]
[-] if_cablemodem.h [edit]
[-] in_route.h [edit]
[-] mpls.h [edit]
[-] input.h [edit]
[-] nfs_idmap.h [edit]
[-] cramfs_fs.h [edit]
[-] ptp_clock.h [edit]
[-] audit.h [edit]
[-] if_tun.h [edit]
[-] igmp.h [edit]
[-] if_alg.h [edit]
[-] random.h [edit]
[-] netfilter_ipv4.h [edit]
[-] atm_nicstar.h [edit]
[-] packet_diag.h [edit]
[-] x25.h [edit]
[+] tc_act
[-] in.h [edit]
[-] irqnr.h [edit]
[-] ncp.h [edit]
[-] reiserfs_xattr.h [edit]
[+] iio
[-] fs.h [edit]
[-] map_to_7segment.h [edit]
[+] sunrpc
[-] if_addr.h [edit]
[-] mtio.h [edit]
[+] nfsd
[-] hysdn_if.h [edit]
[-] pci_regs.h [edit]
[-] mroute6.h [edit]
[-] isdn.h [edit]
[-] udf_fs_i.h [edit]