golden hour

/usr/include/linux

File/Folder	Size	Actions
a.out.h	6.73 KB
acct.h	3.82 KB
acrn.h	16.29 KB
adb.h	1.11 KB
adfs_fs.h	993 B
affs_hardblocks.h	1.54 KB
agpgart.h	3.85 KB
aio_abi.h	3.32 KB
am437x-vpfe.h	3.59 KB
android	-
apm_bios.h	3.6 KB
arcfb.h	213 B
arm_sdei.h	2.69 KB
aspeed-lpc-ctrl.h	1.74 KB
aspeed-p2a-ctrl.h	1.86 KB
atalk.h	1023 B
atm.h	7.7 KB
atm_eni.h	648 B
atm_he.h	406 B
atm_idt77105.h	955 B
atm_nicstar.h	1.25 KB
atm_tcp.h	1.58 KB
atm_zatm.h	1.5 KB
atmapi.h	952 B
atmarp.h	1.27 KB
atmbr2684.h	3.19 KB
atmclip.h	576 B
atmdev.h	7.5 KB
atmioc.h	1.61 KB
atmlec.h	2.33 KB
atmmpc.h	4.13 KB
atmppp.h	639 B
atmsap.h	4.85 KB
atmsvc.h	1.81 KB
audit.h	21.06 KB
auto_dev-ioctl.h	4.87 KB
auto_fs.h	6.28 KB
auto_fs4.h	451 B
auxvec.h	1.56 KB
ax25.h	2.76 KB
batadv_packet.h	19.87 KB
batman_adv.h	16.49 KB
baycom.h	883 B
bcm933xx_hcs.h	419 B
bfs_fs.h	1.86 KB
binfmts.h	776 B
bits.h	447 B
blkpg.h	904 B
blktrace_api.h	4.59 KB
blkzoned.h	6.34 KB
bpf.h	272.11 KB
bpf_common.h	1.33 KB
bpf_perf_event.h	529 B
bpfilter.h	465 B
bpqether.h	981 B
bsg.h	2.44 KB
bt-bmc.h	572 B
btf.h	5.46 KB
btrfs.h	29.85 KB
btrfs_tree.h	25.22 KB
byteorder	-
cachefiles.h	1.61 KB
caif	-
can	-
can.h	11.03 KB
capability.h	13.17 KB
capi.h	3.05 KB
cciss_defs.h	3.2 KB
cciss_ioctl.h	2.7 KB
ccs.h	767 B
cdrom.h	28.87 KB
cec-funcs.h	53.14 KB
cec.h	40.47 KB
cfm_bridge.h	1.42 KB
cgroupstats.h	2.17 KB
chio.h	5.16 KB
cifs	-
close_range.h	377 B
cm4000_cs.h	1.76 KB
cn_proc.h	4.05 KB
coda.h	17.79 KB
coff.h	12.25 KB
connector.h	2.2 KB
const.h	987 B
coresight-stm.h	747 B
cramfs_fs.h	3.47 KB
cryptouser.h	5.2 KB
cuda.h	905 B
cxl_mem.h	7.73 KB
cycx_cfm.h	2.92 KB
dcbnl.h	24.7 KB
dccp.h	6.29 KB
devlink.h	22.3 KB
dlm.h	2.49 KB
dlm_device.h	2.48 KB
dlm_netlink.h	1.13 KB
dlm_plock.h	894 B
dlmconstants.h	4.96 KB
dm-ioctl.h	11.48 KB
dm-log-userspace.h	14.83 KB
dma-buf.h	5.12 KB
dma-heap.h	1.36 KB
dn.h	4.53 KB
dns_resolver.h	3.86 KB
dpll.h	7.19 KB
dqblk_xfs.h	9.17 KB
dvb	-
edd.h	5.47 KB
efs_fs_sb.h	2.17 KB
elf-em.h	2.57 KB
elf-fdpic.h	1.1 KB
elf.h	14.69 KB
errno.h	23 B
errqueue.h	1.94 KB
erspan.h	1.03 KB
ethtool.h	100.09 KB
ethtool_netlink.h	29.87 KB
eventfd.h	264 B
eventpoll.h	2.84 KB
f2fs.h	3.22 KB
fadvise.h	842 B
falloc.h	3.5 KB
fanotify.h	6.64 KB
fb.h	16.09 KB
fcntl.h	4.22 KB
fd.h	11.83 KB
fdreg.h	5.24 KB
fib_rules.h	1.99 KB
fiemap.h	2.71 KB
filter.h	2.16 KB
firewire-cdev.h	43.2 KB
firewire-constants.h	3.16 KB
fou.h	819 B
fpga-dfl.h	8.52 KB
fs.h	12.88 KB
fscrypt.h	6.41 KB
fsi.h	2.2 KB
fsl_hypervisor.h	7.13 KB
fsl_mc.h	734 B
fsmap.h	4.29 KB
fsverity.h	3.11 KB
fuse.h	25.36 KB
futex.h	5.98 KB
gameport.h	897 B
gen_stats.h	1.49 KB
genetlink.h	2.19 KB
genwqe	-
gfs2_ondisk.h	14.43 KB
gpio.h	19.46 KB
gsmmux.h	4.4 KB
gtp.h	734 B
handshake.h	1.61 KB
hash_info.h	971 B
hdlc	-
hdlc.h	637 B
hdlcdrv.h	2.84 KB
hdreg.h	22.17 KB
hid.h	2.04 KB
hiddev.h	6.2 KB
hidraw.h	1.95 KB
hpet.h	743 B
hsi	-
hsr_netlink.h	1.08 KB
hw_breakpoint.h	742 B
hyperv.h	10.89 KB
i2c-dev.h	1.83 KB
i2c.h	6.73 KB
i2o-dev.h	11.28 KB
i8k.h	1.49 KB
icmp.h	4.67 KB
icmpv6.h	4.2 KB
idxd.h	9.11 KB
if.h	10.67 KB
if_addr.h	1.84 KB
if_addrlabel.h	721 B
if_alg.h	1.53 KB
if_arcnet.h	3.63 KB
if_arp.h	6.41 KB
if_bonding.h	5.02 KB
if_bridge.h	20.18 KB
if_cablemodem.h	986 B
if_eql.h	1.32 KB
if_ether.h	8.21 KB
if_fc.h	1.7 KB
if_fddi.h	4.27 KB
if_hippi.h	4.14 KB
if_infiniband.h	1.22 KB
if_link.h	52.83 KB
if_ltalk.h	210 B
if_macsec.h	6.35 KB
if_packet.h	7.99 KB
if_phonet.h	424 B
if_plip.h	660 B
if_ppp.h	29 B
if_pppol2tp.h	3.23 KB
if_pppox.h	4.76 KB
if_slip.h	872 B
if_team.h	2.54 KB
if_tun.h	4 KB
if_tunnel.h	5.36 KB
if_vlan.h	1.79 KB
if_x25.h	881 B
if_xdp.h	4.89 KB
ife.h	351 B
igmp.h	2.99 KB
iio	-
ila.h	1.22 KB
in.h	10.15 KB
in6.h	7.36 KB
in_route.h	936 B
inet_diag.h	4.9 KB
inotify.h	3.21 KB
input-event-codes.h	29.5 KB
input.h	15.84 KB
io_uring.h	20.4 KB
ioctl.h	163 B
iommufd.h	28.39 KB
ioprio.h	4.08 KB
ip.h	4.7 KB
ip6_tunnel.h	1.91 KB
ip_vs.h	13.8 KB
ipc.h	2.05 KB
ipmi.h	15.08 KB
ipmi_bmc.h	488 B
ipmi_msgdefs.h	3.35 KB
ipmi_ssif_bmc.h	441 B
ipsec.h	947 B
ipv6.h	4.07 KB
ipv6_route.h	1.86 KB
ipx.h	2.29 KB
irqnr.h	104 B
isdn	-
iso_fs.h	6.33 KB
isst_if.h	14.92 KB
ivtv.h	2.95 KB
ivtvfb.h	1.18 KB
jffs2.h	6.66 KB
joystick.h	3.35 KB
kcm.h	822 B
kcmp.h	522 B
kcov.h	1.92 KB
kd.h	6.3 KB
kdev_t.h	383 B
kernel-page-flags.h	900 B
kernel.h	194 B
kernelcapi.h	1019 B
kexec.h	2.05 KB
keyboard.h	13.14 KB
keyctl.h	5.86 KB
kfd_ioctl.h	56.75 KB
kfd_sysfs.h	5.1 KB
kvm.h	46.76 KB
kvm_para.h	1001 B
l2tp.h	5.61 KB
landlock.h	10.14 KB
libc-compat.h	8.09 KB
limits.h	937 B
lirc.h	7.95 KB
llc.h	3.09 KB
loadpin.h	834 B
loop.h	3.32 KB
lp.h	4.09 KB
lsm.h	1.51 KB
lwtunnel.h	2.31 KB
magic.h	3.73 KB
major.h	4.55 KB
map_to_7segment.h	6.45 KB
matroxfb.h	1.43 KB
max2175.h	1.01 KB
mdio.h	23.78 KB
media-bus-format.h	6.75 KB
media.h	12.46 KB
mei.h	3.4 KB
mei_uuid.h	738 B
membarrier.h	9.14 KB
memfd.h	1.43 KB
mempolicy.h	2.51 KB
meye.h	2.47 KB
mii.h	9.27 KB
minix_fs.h	2.07 KB
misc	-
mman.h	1.75 KB
mmc	-
mmtimer.h	2.07 KB
module.h	293 B
mount.h	4.9 KB
mpls.h	2.25 KB
mpls_iptunnel.h	761 B
mptcp.h	3.67 KB
mptcp_pm.h	4.3 KB
mqueue.h	2.15 KB
mroute.h	5.78 KB
mroute6.h	4.81 KB
mrp_bridge.h	1.67 KB
msdos_fs.h	6.57 KB
msg.h	3.31 KB
mtio.h	7.98 KB
nbd-netlink.h	2.35 KB
nbd.h	3.77 KB
ncsi.h	4.71 KB
ndctl.h	6.67 KB
neighbour.h	5.91 KB
net.h	2.04 KB
net_dropmon.h	2.85 KB
net_namespace.h	715 B
net_tstamp.h	5.97 KB
netconf.h	614 B
netdev.h	5.39 KB
netdevice.h	2.2 KB
netfilter	-
netfilter.h	1.69 KB
netfilter_arp	-
netfilter_arp.h	445 B
netfilter_bridge	-
netfilter_bridge.h	1.14 KB
netfilter_decnet.h	1.72 KB
netfilter_ipv4	-
netfilter_ipv4.h	1.45 KB
netfilter_ipv6	-
netfilter_ipv6.h	1.35 KB
netlink.h	12.09 KB
netlink_diag.h	1.49 KB
netrom.h	807 B
nexthop.h	3.97 KB
nfc.h	10.95 KB
nfs.h	4.36 KB
nfs2.h	1.43 KB
nfs3.h	2.4 KB
nfs4.h	6.54 KB
nfs4_mount.h	1.89 KB
nfs_fs.h	1.62 KB
nfs_idmap.h	2.19 KB
nfs_mount.h	2.09 KB
nfsacl.h	718 B
nfsd	-
nfsd_netlink.h	1.95 KB
nilfs2_api.h	7.41 KB
nilfs2_ondisk.h	17.66 KB
nitro_enclaves.h	12.85 KB
nl80211.h	338.95 KB
nsfs.h	639 B
nubus.h	8 KB
nvme_ioctl.h	2.43 KB
nvram.h	532 B
omap3isp.h	20.36 KB
omapfb.h	5.78 KB
oom.h	511 B
openat2.h	1.42 KB
openvswitch.h	40.41 KB
packet_diag.h	1.63 KB
param.h	141 B
parport.h	3.56 KB
patchkey.h	892 B
pci.h	1.35 KB
pci_regs.h	60.58 KB
pcitest.h	920 B
perf_event.h	42.43 KB
personality.h	2.05 KB
pfkeyv2.h	10.32 KB
pfrut.h	7.8 KB
pg.h	2.34 KB
phantom.h	1.62 KB
phonet.h	4.57 KB
pidfd.h	256 B
pkt_cls.h	18.65 KB
pkt_sched.h	28.66 KB
pktcdvd.h	2.63 KB
pmu.h	5.32 KB
poll.h	22 B
posix_acl.h	1.22 KB
posix_acl_xattr.h	1.09 KB
posix_types.h	1.07 KB
ppdev.h	3.21 KB
ppp-comp.h	2.47 KB
ppp-ioctl.h	5.59 KB
ppp_defs.h	5.43 KB
pps.h	4.62 KB
pr.h	1.59 KB
prctl.h	10.81 KB
psample.h	2.57 KB
psci.h	5.02 KB
psp-dbc.h	5.16 KB
psp-sev.h	6.26 KB
ptp_clock.h	7.35 KB
ptrace.h	4.29 KB
qemu_fw_cfg.h	2.41 KB
qnx4_fs.h	2.27 KB
qnxtypes.h	624 B
qrtr.h	893 B
quota.h	6.16 KB
radeonfb.h	360 B
raid	-
random.h	1.38 KB
rds.h	10.91 KB
reboot.h	1.31 KB
reiserfs_fs.h	775 B
reiserfs_xattr.h	533 B
remoteproc_cdev.h	1.08 KB
resource.h	2.32 KB
rfkill.h	6.45 KB
rio_cm_cdev.h	3.17 KB
rio_mport_cdev.h	9.11 KB
rkisp1-config.h	30.63 KB
romfs_fs.h	1.21 KB
rose.h	2.18 KB
route.h	2.28 KB
rpl.h	814 B
rpl_iptunnel.h	424 B
rpmsg.h	1.03 KB
rpmsg_types.h	288 B
rseq.h	4.79 KB
rtc.h	5.19 KB
rtnetlink.h	20.8 KB
rxrpc.h	4.81 KB
scc.h	4.52 KB
sched	-
sched.h	6.12 KB
scif_ioctl.h	6.23 KB
screen_info.h	2.42 KB
sctp.h	35.18 KB
seccomp.h	5.6 KB
securebits.h	2.64 KB
sed-opal.h	5.29 KB
seg6.h	1.14 KB
seg6_genl.h	589 B
seg6_hmac.h	423 B
seg6_iptunnel.h	984 B
seg6_local.h	3.78 KB
selinux_netlink.h	1.17 KB
sem.h	2.98 KB
serial.h	4.9 KB
serial_core.h	4.93 KB
serial_reg.h	15.65 KB
serio.h	2.09 KB
sev-guest.h	2.47 KB
shm.h	3.71 KB
signal.h	388 B
signalfd.h	1.2 KB
smc.h	8.31 KB
smc_diag.h	2.77 KB
smiapp.h	1.03 KB
snmp.h	13.92 KB
sock_diag.h	1.27 KB
socket.h	919 B
sockios.h	6.69 KB
sonet.h	2.24 KB
sonypi.h	5.18 KB
sound.h	1.21 KB
soundcard.h	44.96 KB
spi	-
stat.h	7.23 KB
stddef.h	1.69 KB
stm.h	1.25 KB
string.h	238 B
sunrpc	-
surface_aggregator	-
suspend_ioctls.h	1.4 KB
swab.h	6.76 KB
switchtec_ioctl.h	5.14 KB
sync_file.h	3.49 KB
synclink.h	8.77 KB
sysctl.h	25.3 KB
sysinfo.h	1.02 KB
target_core_user.h	4.52 KB
taskstats.h	8.13 KB
tc_act	-
tc_ematch	-
tcp.h	11.65 KB
tcp_metrics.h	1.94 KB
tdx-guest.h	1.27 KB
tee.h	13.09 KB
termios.h	172 B
thermal.h	3.23 KB
time.h	1.71 KB
time_types.h	1.24 KB
timerfd.h	936 B
times.h	278 B
timex.h	7.63 KB
tiocl.h	1.69 KB
tipc.h	8.62 KB
tipc_config.h	14.52 KB
tipc_netlink.h	9.17 KB
tipc_sockets_diag.h	468 B
tls.h	7.06 KB
toshiba.h	1.88 KB
tps6594_pfsm.h	1.13 KB
tty.h	1.55 KB
tty_flags.h	4.4 KB
types.h	1.6 KB
udf_fs_i.h	697 B
udmabuf.h	643 B
udp.h	1.65 KB
uhid.h	4.54 KB
uinput.h	9.04 KB
uio.h	732 B
uleds.h	798 B
ultrasound.h	4.46 KB
um_timetravel.h	3.87 KB
un.h	384 B
unistd.h	220 B
unix_diag.h	1.3 KB
usb	-
usbdevice_fs.h	8.12 KB
usbip.h	1.47 KB
userfaultfd.h	10.68 KB
userio.h	1.48 KB
utime.h	223 B
utsname.h	669 B
uuid.h	28 B
uvcvideo.h	2.57 KB
v4l2-common.h	2.01 KB
v4l2-controls.h	94.59 KB
v4l2-dv-timings.h	30.39 KB
v4l2-mediabus.h	5.3 KB
v4l2-subdev.h	9.76 KB
vbox_err.h	7.09 KB
vbox_vmmdev_types.h	11.38 KB
vboxguest.h	9.15 KB
vdpa.h	1.74 KB
vduse.h	9.58 KB
version.h	374 B
veth.h	224 B
vfio.h	70.12 KB
vfio_ccw.h	1.29 KB
vfio_zdev.h	2.48 KB
vhost.h	8.24 KB
vhost_types.h	4.77 KB
videodev2.h	98.83 KB
virtio_9p.h	2 KB
virtio_balloon.h	5.16 KB
virtio_blk.h	9.75 KB
virtio_bt.h	910 B
virtio_config.h	4.36 KB
virtio_console.h	3.08 KB
virtio_crypto.h	13.56 KB
virtio_fs.h	573 B
virtio_gpio.h	1.7 KB
virtio_gpu.h	11.28 KB
virtio_i2c.h	1.16 KB
virtio_ids.h	3.7 KB
virtio_input.h	2.46 KB
virtio_iommu.h	3.84 KB
virtio_mem.h	6.99 KB
virtio_mmio.h	4.85 KB
virtio_net.h	14.72 KB
virtio_pci.h	7.3 KB
virtio_pcidev.h	2.33 KB
virtio_pmem.h	641 B
virtio_ring.h	8.52 KB
virtio_rng.h	265 B
virtio_scmi.h	637 B
virtio_scsi.h	5.94 KB
virtio_snd.h	12.86 KB
virtio_types.h	2.1 KB
virtio_vsock.h	3.27 KB
vm_sockets.h	7.18 KB
vm_sockets_diag.h	963 B
vmcore.h	455 B
vsockmon.h	1.84 KB
vt.h	2.99 KB
vtpm_proxy.h	1.68 KB
wait.h	682 B
watch_queue.h	3.41 KB
watchdog.h	2.28 KB
wireguard.h	7.57 KB
wireless.h	41.7 KB
wmi.h	1.72 KB
wwan.h	295 B
x25.h	3.48 KB
xattr.h	2.95 KB
xdp_diag.h	1.43 KB
xfrm.h	12.33 KB
xilinx-v4l2-controls.h	2.91 KB
zorro.h	3.22 KB
zorro_ids.h	29.26 KB

Edit: nilfs2_ondisk.h

/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
/*
 * nilfs2_ondisk.h - NILFS2 on-disk structures
 *
 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 */
/*
 *  linux/include/linux/ext2_fs.h
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * Remy Card (card@masi.ibp.fr)
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 *
 *  from
 *
 *  linux/include/linux/minix_fs.h
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 */

#ifndef _LINUX_NILFS2_ONDISK_H
#define _LINUX_NILFS2_ONDISK_H

#include <linux/types.h>
#include <linux/magic.h>
#include <asm/byteorder.h>

#define NILFS_INODE_BMAP_SIZE	7

/**
 * struct nilfs_inode - structure of an inode on disk
 * @i_blocks: blocks count
 * @i_size: size in bytes
 * @i_ctime: creation time (seconds)
 * @i_mtime: modification time (seconds)
 * @i_ctime_nsec: creation time (nano seconds)
 * @i_mtime_nsec: modification time (nano seconds)
 * @i_uid: user id
 * @i_gid: group id
 * @i_mode: file mode
 * @i_links_count: links count
 * @i_flags: file flags
 * @i_bmap: block mapping
 * @i_xattr: extended attributes
 * @i_generation: file generation (for NFS)
 * @i_pad: padding
 */
struct nilfs_inode {
	__le64	i_blocks;
	__le64	i_size;
	__le64	i_ctime;
	__le64	i_mtime;
	__le32	i_ctime_nsec;
	__le32	i_mtime_nsec;
	__le32	i_uid;
	__le32	i_gid;
	__le16	i_mode;
	__le16	i_links_count;
	__le32	i_flags;
	__le64	i_bmap[NILFS_INODE_BMAP_SIZE];
#define i_device_code	i_bmap[0]
	__le64	i_xattr;
	__le32	i_generation;
	__le32	i_pad;
};

#define NILFS_MIN_INODE_SIZE		128

/**
 * struct nilfs_super_root - structure of super root
 * @sr_sum: check sum
 * @sr_bytes: byte count of the structure
 * @sr_flags: flags (reserved)
 * @sr_nongc_ctime: write time of the last segment not for cleaner operation
 * @sr_dat: DAT file inode
 * @sr_cpfile: checkpoint file inode
 * @sr_sufile: segment usage file inode
 */
struct nilfs_super_root {
	__le32 sr_sum;
	__le16 sr_bytes;
	__le16 sr_flags;
	__le64 sr_nongc_ctime;
	struct nilfs_inode sr_dat;
	struct nilfs_inode sr_cpfile;
	struct nilfs_inode sr_sufile;
};

#define NILFS_SR_MDT_OFFSET(inode_size, i)  \
	((unsigned long)&((struct nilfs_super_root *)0)->sr_dat + \
			(inode_size) * (i))
#define NILFS_SR_DAT_OFFSET(inode_size)     NILFS_SR_MDT_OFFSET(inode_size, 0)
#define NILFS_SR_CPFILE_OFFSET(inode_size)  NILFS_SR_MDT_OFFSET(inode_size, 1)
#define NILFS_SR_SUFILE_OFFSET(inode_size)  NILFS_SR_MDT_OFFSET(inode_size, 2)
#define NILFS_SR_BYTES(inode_size)	    NILFS_SR_MDT_OFFSET(inode_size, 3)

/*
 * Maximal mount counts
 */
#define NILFS_DFL_MAX_MNT_COUNT		50      /* 50 mounts */

/*
 * File system states (sbp->s_state, nilfs->ns_mount_state)
 */
#define NILFS_VALID_FS			0x0001  /* Unmounted cleanly */
#define NILFS_ERROR_FS			0x0002  /* Errors detected */
#define NILFS_RESIZE_FS			0x0004	/* Resize required */

/*
 * Mount flags (sbi->s_mount_opt)
 */
#define NILFS_MOUNT_ERROR_MODE		0x0070  /* Error mode mask */
#define NILFS_MOUNT_ERRORS_CONT		0x0010  /* Continue on errors */
#define NILFS_MOUNT_ERRORS_RO		0x0020  /* Remount fs ro on errors */
#define NILFS_MOUNT_ERRORS_PANIC	0x0040  /* Panic on errors */
#define NILFS_MOUNT_BARRIER		0x1000  /* Use block barriers */
#define NILFS_MOUNT_STRICT_ORDER	0x2000  /*
						 * Apply strict in-order
						 * semantics also for data
						 */
#define NILFS_MOUNT_NORECOVERY		0x4000  /*
						 * Disable write access during
						 * mount-time recovery
						 */
#define NILFS_MOUNT_DISCARD		0x8000  /* Issue DISCARD requests */

/**
 * struct nilfs_super_block - structure of super block on disk
 */
struct nilfs_super_block {
/*00*/	__le32	s_rev_level;		/* Revision level */
	__le16	s_minor_rev_level;	/* minor revision level */
	__le16	s_magic;		/* Magic signature */

__le16  s_bytes;		/*
					 * Bytes count of CRC calculation
					 * for this structure. s_reserved
					 * is excluded.
					 */
	__le16  s_flags;		/* flags */
	__le32  s_crc_seed;		/* Seed value of CRC calculation */
/*10*/	__le32	s_sum;			/* Check sum of super block */

__le32	s_log_block_size;	/*
					 * Block size represented as follows
					 * blocksize =
					 *     1 << (s_log_block_size + 10)
					 */
	__le64  s_nsegments;		/* Number of segments in filesystem */
/*20*/	__le64  s_dev_size;		/* block device size in bytes */
	__le64	s_first_data_block;	/* 1st seg disk block number */
/*30*/	__le32  s_blocks_per_segment;   /* number of blocks per full segment */
	__le32	s_r_segments_percentage; /* Reserved segments percentage */

__le64  s_last_cno;		/* Last checkpoint number */
/*40*/	__le64  s_last_pseg;		/* disk block addr pseg written last */
	__le64  s_last_seq;             /* seq. number of seg written last */
/*50*/	__le64	s_free_blocks_count;	/* Free blocks count */

__le64	s_ctime;		/*
					 * Creation time (execution time of
					 * newfs)
					 */
/*60*/	__le64	s_mtime;		/* Mount time */
	__le64	s_wtime;		/* Write time */
/*70*/	__le16	s_mnt_count;		/* Mount count */
	__le16	s_max_mnt_count;	/* Maximal mount count */
	__le16	s_state;		/* File system state */
	__le16	s_errors;		/* Behaviour when detecting errors */
	__le64	s_lastcheck;		/* time of last check */

/*80*/	__le32	s_checkinterval;	/* max. time between checks */
	__le32	s_creator_os;		/* OS */
	__le16	s_def_resuid;		/* Default uid for reserved blocks */
	__le16	s_def_resgid;		/* Default gid for reserved blocks */
	__le32	s_first_ino;		/* First non-reserved inode */

/*90*/	__le16  s_inode_size;		/* Size of an inode */
	__le16  s_dat_entry_size;       /* Size of a dat entry */
	__le16  s_checkpoint_size;      /* Size of a checkpoint */
	__le16	s_segment_usage_size;	/* Size of a segment usage */

/*98*/	__u8	s_uuid[16];		/* 128-bit uuid for volume */
/*A8*/	char	s_volume_name[80];	/* volume name */

/*F8*/	__le32  s_c_interval;           /* Commit interval of segment */
	__le32  s_c_block_max;          /*
					 * Threshold of data amount for
					 * the segment construction
					 */
/*100*/	__le64  s_feature_compat;	/* Compatible feature set */
	__le64  s_feature_compat_ro;	/* Read-only compatible feature set */
	__le64  s_feature_incompat;	/* Incompatible feature set */
	__u32	s_reserved[186];	/* padding to the end of the block */
};

/*
 * Codes for operating systems
 */
#define NILFS_OS_LINUX		0
/* Codes from 1 to 4 are reserved to keep compatibility with ext2 creator-OS */

/*
 * Revision levels
 */
#define NILFS_CURRENT_REV	2	/* current major revision */
#define NILFS_MINOR_REV		0	/* minor revision */
#define NILFS_MIN_SUPP_REV	2	/* minimum supported revision */

/*
 * Feature set definitions
 *
 * If there is a bit set in the incompatible feature set that the kernel
 * doesn't know about, it should refuse to mount the filesystem.
 */
#define NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT	0x00000001ULL

#define NILFS_FEATURE_COMPAT_SUPP	0ULL
#define NILFS_FEATURE_COMPAT_RO_SUPP	NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT
#define NILFS_FEATURE_INCOMPAT_SUPP	0ULL

/*
 * Bytes count of super_block for CRC-calculation
 */
#define NILFS_SB_BYTES  \
	((long)&((struct nilfs_super_block *)0)->s_reserved)

/*
 * Special inode number
 */
#define NILFS_ROOT_INO		2	/* Root file inode */
#define NILFS_DAT_INO		3	/* DAT file */
#define NILFS_CPFILE_INO	4	/* checkpoint file */
#define NILFS_SUFILE_INO	5	/* segment usage file */
#define NILFS_IFILE_INO		6	/* ifile */
#define NILFS_ATIME_INO		7	/* Atime file (reserved) */
#define NILFS_XATTR_INO		8	/* Xattribute file (reserved) */
#define NILFS_SKETCH_INO	10	/* Sketch file */
#define NILFS_USER_INO		11	/* Fisrt user's file inode number */

#define NILFS_SB_OFFSET_BYTES	1024	/* byte offset of nilfs superblock */

#define NILFS_SEG_MIN_BLOCKS	16	/*
					 * Minimum number of blocks in
					 * a full segment
					 */
#define NILFS_PSEG_MIN_BLOCKS	2	/*
					 * Minimum number of blocks in
					 * a partial segment
					 */
#define NILFS_MIN_NRSVSEGS	8	/*
					 * Minimum number of reserved
					 * segments
					 */

/*
 * We call DAT, cpfile, and sufile root metadata files.  Inodes of
 * these files are written in super root block instead of ifile, and
 * garbage collector doesn't keep any past versions of these files.
 */
#define NILFS_ROOT_METADATA_FILE(ino) \
	((ino) >= NILFS_DAT_INO && (ino) <= NILFS_SUFILE_INO)

/*
 * bytes offset of secondary super block
 */
#define NILFS_SB2_OFFSET_BYTES(devsize)	((((devsize) >> 12) - 1) << 12)

/*
 * Maximal count of links to a file
 */
#define NILFS_LINK_MAX		32000

/*
 * Structure of a directory entry
 *  (Same as ext2)
 */

#define NILFS_NAME_LEN 255

/*
 * Block size limitations
 */
#define NILFS_MIN_BLOCK_SIZE		1024
#define NILFS_MAX_BLOCK_SIZE		65536

/*
 * The new version of the directory entry.  Since V0 structures are
 * stored in intel byte order, and the name_len field could never be
 * bigger than 255 chars, it's safe to reclaim the extra byte for the
 * file_type field.
 */
struct nilfs_dir_entry {
	__le64	inode;			/* Inode number */
	__le16	rec_len;		/* Directory entry length */
	__u8	name_len;		/* Name length */
	__u8	file_type;		/* Dir entry type (file, dir, etc) */
	char	name[NILFS_NAME_LEN];	/* File name */
	char    pad;
};

/*
 * NILFS directory file types.  Only the low 3 bits are used.  The
 * other bits are reserved for now.
 */
enum {
	NILFS_FT_UNKNOWN,
	NILFS_FT_REG_FILE,
	NILFS_FT_DIR,
	NILFS_FT_CHRDEV,
	NILFS_FT_BLKDEV,
	NILFS_FT_FIFO,
	NILFS_FT_SOCK,
	NILFS_FT_SYMLINK,
	NILFS_FT_MAX
};

/*
 * NILFS_DIR_PAD defines the directory entries boundaries
 *
 * NOTE: It must be a multiple of 8
 */
#define NILFS_DIR_PAD			8
#define NILFS_DIR_ROUND			(NILFS_DIR_PAD - 1)
#define NILFS_DIR_REC_LEN(name_len)	(((name_len) + 12 + NILFS_DIR_ROUND) & \
					~NILFS_DIR_ROUND)
#define NILFS_MAX_REC_LEN		((1 << 16) - 1)

/**
 * struct nilfs_finfo - file information
 * @fi_ino: inode number
 * @fi_cno: checkpoint number
 * @fi_nblocks: number of blocks (including intermediate blocks)
 * @fi_ndatablk: number of file data blocks
 */
struct nilfs_finfo {
	__le64 fi_ino;
	__le64 fi_cno;
	__le32 fi_nblocks;
	__le32 fi_ndatablk;
};

/**
 * struct nilfs_binfo_v - information on a data block (except DAT)
 * @bi_vblocknr: virtual block number
 * @bi_blkoff: block offset
 */
struct nilfs_binfo_v {
	__le64 bi_vblocknr;
	__le64 bi_blkoff;
};

/**
 * struct nilfs_binfo_dat - information on a DAT node block
 * @bi_blkoff: block offset
 * @bi_level: level
 * @bi_pad: padding
 */
struct nilfs_binfo_dat {
	__le64 bi_blkoff;
	__u8 bi_level;
	__u8 bi_pad[7];
};

/**
 * union nilfs_binfo: block information
 * @bi_v: nilfs_binfo_v structure
 * @bi_dat: nilfs_binfo_dat structure
 */
union nilfs_binfo {
	struct nilfs_binfo_v bi_v;
	struct nilfs_binfo_dat bi_dat;
};

/**
 * struct nilfs_segment_summary - segment summary header
 * @ss_datasum: checksum of data
 * @ss_sumsum: checksum of segment summary
 * @ss_magic: magic number
 * @ss_bytes: size of this structure in bytes
 * @ss_flags: flags
 * @ss_seq: sequence number
 * @ss_create: creation timestamp
 * @ss_next: next segment
 * @ss_nblocks: number of blocks
 * @ss_nfinfo: number of finfo structures
 * @ss_sumbytes: total size of segment summary in bytes
 * @ss_pad: padding
 * @ss_cno: checkpoint number
 */
struct nilfs_segment_summary {
	__le32 ss_datasum;
	__le32 ss_sumsum;
	__le32 ss_magic;
	__le16 ss_bytes;
	__le16 ss_flags;
	__le64 ss_seq;
	__le64 ss_create;
	__le64 ss_next;
	__le32 ss_nblocks;
	__le32 ss_nfinfo;
	__le32 ss_sumbytes;
	__le32 ss_pad;
	__le64 ss_cno;
	/* array of finfo structures */
};

#define NILFS_SEGSUM_MAGIC	0x1eaffa11  /* segment summary magic number */

/*
 * Segment summary flags
 */
#define NILFS_SS_LOGBGN 0x0001  /* begins a logical segment */
#define NILFS_SS_LOGEND 0x0002  /* ends a logical segment */
#define NILFS_SS_SR     0x0004  /* has super root */
#define NILFS_SS_SYNDT  0x0008  /* includes data only updates */
#define NILFS_SS_GC     0x0010  /* segment written for cleaner operation */

/**
 * struct nilfs_btree_node - header of B-tree node block
 * @bn_flags: flags
 * @bn_level: level
 * @bn_nchildren: number of children
 * @bn_pad: padding
 */
struct nilfs_btree_node {
	__u8 bn_flags;
	__u8 bn_level;
	__le16 bn_nchildren;
	__le32 bn_pad;
};

/* flags */
#define NILFS_BTREE_NODE_ROOT   0x01

/* level */
#define NILFS_BTREE_LEVEL_DATA          0
#define NILFS_BTREE_LEVEL_NODE_MIN      (NILFS_BTREE_LEVEL_DATA + 1)
#define NILFS_BTREE_LEVEL_MAX           14	/* Max level (exclusive) */

/**
 * struct nilfs_direct_node - header of built-in bmap array
 * @dn_flags: flags
 * @dn_pad: padding
 */
struct nilfs_direct_node {
	__u8 dn_flags;
	__u8 pad[7];
};

/**
 * struct nilfs_palloc_group_desc - block group descriptor
 * @pg_nfrees: number of free entries in block group
 */
struct nilfs_palloc_group_desc {
	__le32 pg_nfrees;
};

/**
 * struct nilfs_dat_entry - disk address translation entry
 * @de_blocknr: block number
 * @de_start: start checkpoint number
 * @de_end: end checkpoint number
 * @de_rsv: reserved for future use
 */
struct nilfs_dat_entry {
	__le64 de_blocknr;
	__le64 de_start;
	__le64 de_end;
	__le64 de_rsv;
};

#define NILFS_MIN_DAT_ENTRY_SIZE	32

/**
 * struct nilfs_snapshot_list - snapshot list
 * @ssl_next: next checkpoint number on snapshot list
 * @ssl_prev: previous checkpoint number on snapshot list
 */
struct nilfs_snapshot_list {
	__le64 ssl_next;
	__le64 ssl_prev;
};

/**
 * struct nilfs_checkpoint - checkpoint structure
 * @cp_flags: flags
 * @cp_checkpoints_count: checkpoints count in a block
 * @cp_snapshot_list: snapshot list
 * @cp_cno: checkpoint number
 * @cp_create: creation timestamp
 * @cp_nblk_inc: number of blocks incremented by this checkpoint
 * @cp_inodes_count: inodes count
 * @cp_blocks_count: blocks count
 * @cp_ifile_inode: inode of ifile
 */
struct nilfs_checkpoint {
	__le32 cp_flags;
	__le32 cp_checkpoints_count;
	struct nilfs_snapshot_list cp_snapshot_list;
	__le64 cp_cno;
	__le64 cp_create;
	__le64 cp_nblk_inc;
	__le64 cp_inodes_count;
	__le64 cp_blocks_count;

/*
	 * Do not change the byte offset of ifile inode.
	 * To keep the compatibility of the disk format,
	 * additional fields should be added behind cp_ifile_inode.
	 */
	struct nilfs_inode cp_ifile_inode;
};

#define NILFS_MIN_CHECKPOINT_SIZE	(64 + NILFS_MIN_INODE_SIZE)

/* checkpoint flags */
enum {
	NILFS_CHECKPOINT_SNAPSHOT,
	NILFS_CHECKPOINT_INVALID,
	NILFS_CHECKPOINT_SKETCH,
	NILFS_CHECKPOINT_MINOR,
};

#define NILFS_CHECKPOINT_FNS(flag, name)				\
static __inline__ void							\
nilfs_checkpoint_set_##name(struct nilfs_checkpoint *cp)		\
{									\
	cp->cp_flags = __cpu_to_le32(__le32_to_cpu(cp->cp_flags) |	\
				     (1UL << NILFS_CHECKPOINT_##flag));	\
}									\
static __inline__ void							\
nilfs_checkpoint_clear_##name(struct nilfs_checkpoint *cp)		\
{									\
	cp->cp_flags = __cpu_to_le32(__le32_to_cpu(cp->cp_flags) &	\
				   ~(1UL << NILFS_CHECKPOINT_##flag));	\
}									\
static __inline__ int							\
nilfs_checkpoint_##name(const struct nilfs_checkpoint *cp)		\
{									\
	return !!(__le32_to_cpu(cp->cp_flags) &				\
		  (1UL << NILFS_CHECKPOINT_##flag));			\
}

NILFS_CHECKPOINT_FNS(SNAPSHOT, snapshot)
NILFS_CHECKPOINT_FNS(INVALID, invalid)
NILFS_CHECKPOINT_FNS(MINOR, minor)

/**
 * struct nilfs_cpfile_header - checkpoint file header
 * @ch_ncheckpoints: number of checkpoints
 * @ch_nsnapshots: number of snapshots
 * @ch_snapshot_list: snapshot list
 */
struct nilfs_cpfile_header {
	__le64 ch_ncheckpoints;
	__le64 ch_nsnapshots;
	struct nilfs_snapshot_list ch_snapshot_list;
};

#define NILFS_CPFILE_FIRST_CHECKPOINT_OFFSET				\
	((sizeof(struct nilfs_cpfile_header) +				\
	  sizeof(struct nilfs_checkpoint) - 1) /			\
			sizeof(struct nilfs_checkpoint))

/**
 * struct nilfs_segment_usage - segment usage
 * @su_lastmod: last modified timestamp
 * @su_nblocks: number of blocks in segment
 * @su_flags: flags
 */
struct nilfs_segment_usage {
	__le64 su_lastmod;
	__le32 su_nblocks;
	__le32 su_flags;
};

#define NILFS_MIN_SEGMENT_USAGE_SIZE	16

/* segment usage flag */
enum {
	NILFS_SEGMENT_USAGE_ACTIVE,
	NILFS_SEGMENT_USAGE_DIRTY,
	NILFS_SEGMENT_USAGE_ERROR,
};

#define NILFS_SEGMENT_USAGE_FNS(flag, name)				\
static __inline__ void							\
nilfs_segment_usage_set_##name(struct nilfs_segment_usage *su)		\
{									\
	su->su_flags = __cpu_to_le32(__le32_to_cpu(su->su_flags) |	\
				   (1UL << NILFS_SEGMENT_USAGE_##flag));\
}									\
static __inline__ void							\
nilfs_segment_usage_clear_##name(struct nilfs_segment_usage *su)	\
{									\
	su->su_flags =							\
		__cpu_to_le32(__le32_to_cpu(su->su_flags) &		\
			    ~(1UL << NILFS_SEGMENT_USAGE_##flag));      \
}									\
static __inline__ int							\
nilfs_segment_usage_##name(const struct nilfs_segment_usage *su)	\
{									\
	return !!(__le32_to_cpu(su->su_flags) &				\
		  (1UL << NILFS_SEGMENT_USAGE_##flag));			\
}

NILFS_SEGMENT_USAGE_FNS(ACTIVE, active)
NILFS_SEGMENT_USAGE_FNS(DIRTY, dirty)
NILFS_SEGMENT_USAGE_FNS(ERROR, error)

static __inline__ void
nilfs_segment_usage_set_clean(struct nilfs_segment_usage *su)
{
	su->su_lastmod = __cpu_to_le64(0);
	su->su_nblocks = __cpu_to_le32(0);
	su->su_flags = __cpu_to_le32(0);
}

static __inline__ int
nilfs_segment_usage_clean(const struct nilfs_segment_usage *su)
{
	return !__le32_to_cpu(su->su_flags);
}

/**
 * struct nilfs_sufile_header - segment usage file header
 * @sh_ncleansegs: number of clean segments
 * @sh_ndirtysegs: number of dirty segments
 * @sh_last_alloc: last allocated segment number
 */
struct nilfs_sufile_header {
	__le64 sh_ncleansegs;
	__le64 sh_ndirtysegs;
	__le64 sh_last_alloc;
	/* ... */
};

#define NILFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET				\
	((sizeof(struct nilfs_sufile_header) +				\
	  sizeof(struct nilfs_segment_usage) - 1) /			\
			 sizeof(struct nilfs_segment_usage))

#endif	/* _LINUX_NILFS2_ONDISK_H */