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Current Path: /usr/include/linux

📁 ..
📄 a.out.h(7.15 KB)
📄 acct.h(3.41 KB)
📄 adb.h(1.05 KB)
📄 adfs_fs.h(856 B)
📄 affs_hardblocks.h(1.45 KB)
📄 agpgart.h(3.83 KB)
📄 aio_abi.h(3.04 KB)
📄 apm_bios.h(3.46 KB)
📄 arcfb.h(150 B)
📄 atalk.h(927 B)
📄 atm.h(7.62 KB)
📄 atm_eni.h(585 B)
📄 atm_he.h(343 B)
📄 atm_idt77105.h(892 B)
📄 atm_nicstar.h(1.19 KB)
📄 atm_tcp.h(1.5 KB)
📄 atm_zatm.h(1.57 KB)
📄 atmapi.h(889 B)
📄 atmarp.h(1.2 KB)
📄 atmbr2684.h(3.13 KB)
📄 atmclip.h(513 B)
📄 atmdev.h(7.42 KB)
📄 atmioc.h(1.55 KB)
📄 atmlec.h(2.5 KB)
📄 atmmpc.h(4.07 KB)
📄 atmppp.h(576 B)
📄 atmsap.h(4.79 KB)
📄 atmsvc.h(1.75 KB)
📄 audit.h(15.51 KB)
📄 auto_fs.h(2.29 KB)
📄 auto_fs4.h(4.03 KB)
📄 auxvec.h(1.35 KB)
📄 ax25.h(2.69 KB)
📄 b1lli.h(1.62 KB)
📄 baycom.h(820 B)
📄 bfs_fs.h(1.79 KB)
📄 binfmts.h(565 B)
📄 blk_types.h(6.94 KB)
📄 blkpg.h(1.56 KB)
📄 blktrace_api.h(4.37 KB)
📄 bpqether.h(952 B)
📄 bsg.h(2.33 KB)
📁 byteorder
📁 can
📄 can.h(3.25 KB)
📄 capability.h(10.34 KB)
📄 capi.h(2.99 KB)
📄 cciss_ioctl.h(5.69 KB)
📄 cdk.h(12.47 KB)
📄 cdrom.h(27.47 KB)
📄 cgroupstats.h(2.1 KB)
📄 chio.h(5.16 KB)
📄 cm4000_cs.h(1.68 KB)
📄 cn_proc.h(2.65 KB)
📄 coda.h(17.08 KB)
📄 coda_psdev.h(679 B)
📄 coff.h(12.12 KB)
📄 comstats.h(3.05 KB)
📄 connector.h(2.08 KB)
📄 const.h(682 B)
📄 cramfs_fs.h(2.86 KB)
📄 cuda.h(769 B)
📄 cyclades.h(16.65 KB)
📄 cycx_cfm.h(2.86 KB)
📄 dcbnl.h(21.6 KB)
📄 dccp.h(5.66 KB)
📄 dlm.h(2.47 KB)
📄 dlm_device.h(2.42 KB)
📄 dlm_netlink.h(1.04 KB)
📄 dlm_plock.h(806 B)
📄 dlmconstants.h(4.9 KB)
📄 dm-ioctl.h(10.42 KB)
📄 dm-log-userspace.h(14.82 KB)
📄 dn.h(4.42 KB)
📄 dqblk_xfs.h(6.79 KB)
📁 dvb
📄 edd.h(5.41 KB)
📄 efs_fs_sb.h(2.11 KB)
📄 elf-em.h(1.79 KB)
📄 elf-fdpic.h(2.5 KB)
📄 elf.h(10.97 KB)
📄 elfcore.h(2.86 KB)
📄 errno.h(79 B)
📄 errqueue.h(443 B)
📄 ethtool.h(33.37 KB)
📄 eventpoll.h(1.32 KB)
📄 ext2_fs.h(18.36 KB)
📄 fadvise.h(855 B)
📄 falloc.h(293 B)
📄 fb.h(15.64 KB)
📄 fcntl.h(1.57 KB)
📄 fd.h(11.29 KB)
📄 fdreg.h(5.23 KB)
📄 fib_rules.h(1.42 KB)
📄 fiemap.h(2.49 KB)
📄 filter.h(3.45 KB)
📄 firewire-cdev.h(24.47 KB)
📄 firewire-constants.h(1.93 KB)
📄 flat.h(2.04 KB)
📄 fs.h(18.47 KB)
📄 fuse.h(11.17 KB)
📄 futex.h(4.79 KB)
📄 gameport.h(816 B)
📄 gen_stats.h(1.27 KB)
📄 generic_serial.h(895 B)
📄 genetlink.h(1.64 KB)
📄 gfs2_ondisk.h(11.54 KB)
📄 gigaset_dev.h(981 B)
📄 hayesesp.h(230 B)
📁 hdlc
📄 hdlc.h(574 B)
📄 hdlcdrv.h(2.78 KB)
📄 hdreg.h(22.11 KB)
📄 hid.h(1.78 KB)
📄 hiddev.h(6.12 KB)
📄 hidraw.h(1.19 KB)
📄 hpet.h(686 B)
📄 hysdn_if.h(1.29 KB)
📄 i2c-dev.h(2.35 KB)
📄 i2c.h(6.48 KB)
📄 i2o-dev.h(11.22 KB)
📄 i8k.h(1.4 KB)
📄 icmp.h(2.82 KB)
📄 icmpv6.h(3.74 KB)
📄 if.h(8.47 KB)
📄 if_addr.h(1.42 KB)
📄 if_addrlabel.h(658 B)
📄 if_arcnet.h(3.63 KB)
📄 if_arp.h(5.97 KB)
📄 if_bonding.h(3.98 KB)
📄 if_bridge.h(3.72 KB)
📄 if_cablemodem.h(910 B)
📄 if_ec.h(901 B)
📄 if_eql.h(1.25 KB)
📄 if_ether.h(6.39 KB)
📄 if_fc.h(1.63 KB)
📄 if_fddi.h(3.61 KB)
📄 if_frad.h(2.87 KB)
📄 if_hippi.h(4.08 KB)
📄 if_infiniband.h(1.12 KB)
📄 if_link.h(11.79 KB)
📄 if_ltalk.h(125 B)
📄 if_packet.h(3.45 KB)
📄 if_phonet.h(337 B)
📄 if_plip.h(596 B)
📄 if_ppp.h(6.78 KB)
📄 if_pppol2tp.h(1.94 KB)
📄 if_pppox.h(3.68 KB)
📄 if_slip.h(809 B)
📄 if_strip.h(700 B)
📄 if_tr.h(3.12 KB)
📄 if_tun.h(2.94 KB)
📄 if_tunnel.h(1.42 KB)
📄 if_vlan.h(1.67 KB)
📄 igmp.h(2.86 KB)
📄 in.h(8.99 KB)
📄 in6.h(7.32 KB)
📄 in_route.h(873 B)
📄 inet_diag.h(2.4 KB)
📄 inotify.h(2.77 KB)
📄 input.h(26.95 KB)
📄 ioctl.h(100 B)
📄 ip.h(3.47 KB)
📄 ip6_tunnel.h(1.05 KB)
📄 ip_vs.h(12.29 KB)
📄 ipc.h(1.99 KB)
📄 ipmi.h(16.16 KB)
📄 ipmi_msgdefs.h(4.37 KB)
📄 ipsec.h(884 B)
📄 ipv6.h(2.82 KB)
📄 ipv6_route.h(1.58 KB)
📄 ipx.h(1.78 KB)
📄 irda.h(7.47 KB)
📄 irqnr.h(93 B)
📁 isdn
📄 isdn.h(5.55 KB)
📄 isdn_divertif.h(1.01 KB)
📄 isdn_ppp.h(1.82 KB)
📄 isdnif.h(2.25 KB)
📄 iso_fs.h(6.29 KB)
📄 ivtv.h(2.66 KB)
📄 ivtvfb.h(1.12 KB)
📄 ixjuser.h(24.53 KB)
📄 jffs2.h(6.79 KB)
📄 joystick.h(3.5 KB)
📄 kd.h(6.02 KB)
📄 kdev_t.h(298 B)
📄 kernel.h(2.4 KB)
📄 kernelcapi.h(959 B)
📄 keyboard.h(12.4 KB)
📄 keyctl.h(2.91 KB)
📄 kvm.h(20.2 KB)
📄 kvm_para.h(564 B)
📄 libc-compat.h(3.46 KB)
📄 limits.h(874 B)
📄 llc.h(2.77 KB)
📄 loop.h(2.14 KB)
📄 lp.h(3.71 KB)
📄 magic.h(2.24 KB)
📄 major.h(4.55 KB)
📄 map_to_7segment.h(7.02 KB)
📄 matroxfb.h(1.4 KB)
📄 mempolicy.h(2 KB)
📄 meye.h(2.48 KB)
📄 mii.h(7.76 KB)
📄 minix_fs.h(2.01 KB)
📄 mman.h(230 B)
📄 mmtimer.h(2.01 KB)
📄 mqueue.h(2.01 KB)
📄 mroute.h(3.72 KB)
📄 mroute6.h(3.9 KB)
📄 msdos_fs.h(5.7 KB)
📄 msg.h(2.48 KB)
📄 mtio.h(7.89 KB)
📄 n_r3964.h(2.29 KB)
📄 nbd.h(1.91 KB)
📄 ncp.h(4.94 KB)
📄 ncp_fs.h(3.28 KB)
📄 ncp_mount.h(2.06 KB)
📄 ncp_no.h(651 B)
📄 neighbour.h(3.96 KB)
📄 net.h(1.97 KB)
📄 net_dropmon.h(1.07 KB)
📄 net_tstamp.h(3.39 KB)
📄 netdevice.h(1.73 KB)
📁 netfilter
📄 netfilter.h(1.51 KB)
📁 netfilter_arp
📄 netfilter_arp.h(380 B)
📁 netfilter_bridge
📄 netfilter_bridge.h(735 B)
📄 netfilter_decnet.h(1.83 KB)
📁 netfilter_ipv4
📄 netfilter_ipv4.h(1.98 KB)
📁 netfilter_ipv6
📄 netfilter_ipv6.h(2 KB)
📄 netlink.h(4.85 KB)
📄 netrom.h(719 B)
📄 nfs.h(4.25 KB)
📄 nfs2.h(1.37 KB)
📄 nfs3.h(2.16 KB)
📄 nfs4.h(5.63 KB)
📄 nfs4_mount.h(1.83 KB)
📄 nfs_fs.h(1.52 KB)
📄 nfs_idmap.h(2.19 KB)
📄 nfs_mount.h(3.13 KB)
📄 nfsacl.h(577 B)
📁 nfsd
📄 nl80211.h(187.85 KB)
📄 nubus.h(8.17 KB)
📄 nvram.h(470 B)
📄 oom.h(456 B)
📄 param.h(78 B)
📄 parport.h(3.56 KB)
📄 patchkey.h(831 B)
📄 pci.h(1.45 KB)
📄 pci_regs.h(37.08 KB)
📄 perf_event.h(21.34 KB)
📄 personality.h(1.95 KB)
📄 pfkeyv2.h(9.91 KB)
📄 pg.h(2.23 KB)
📄 phantom.h(1.55 KB)
📄 phonet.h(4.25 KB)
📄 pkt_cls.h(9.08 KB)
📄 pkt_sched.h(10.63 KB)
📄 pktcdvd.h(2.56 KB)
📄 pmu.h(5.07 KB)
📄 poll.h(96 B)
📄 posix_types.h(1.24 KB)
📄 ppdev.h(3.07 KB)
📄 ppp-comp.h(6.36 KB)
📄 ppp_defs.h(6.31 KB)
📄 pps.h(3.85 KB)
📄 prctl.h(4.86 KB)
📄 ptp_clock.h(3.41 KB)
📄 ptrace.h(2.24 KB)
📄 qnx4_fs.h(2.21 KB)
📄 qnxtypes.h(561 B)
📄 quota.h(5.59 KB)
📄 radeonfb.h(297 B)
📁 raid
📄 random.h(1.06 KB)
📄 raw.h(302 B)
📄 reboot.h(1.25 KB)
📄 reiserfs_fs.h(907 B)
📄 reiserfs_xattr.h(465 B)
📄 resource.h(2.04 KB)
📄 rfkill.h(3.3 KB)
📄 romfs_fs.h(1.1 KB)
📄 rose.h(2.05 KB)
📄 route.h(2.22 KB)
📄 rtc.h(3.61 KB)
📄 rtnetlink.h(14.98 KB)
📄 scc.h(4.44 KB)
📄 sched.h(2.05 KB)
📄 screen_info.h(2.15 KB)
📄 sdla.h(2.77 KB)
📄 selinux_netlink.h(1.11 KB)
📄 sem.h(3.58 KB)
📄 serial.h(6.62 KB)
📄 serial_core.h(3.93 KB)
📄 serial_reg.h(12.93 KB)
📄 serio.h(1.65 KB)
📄 shm.h(2.14 KB)
📄 signal.h(129 B)
📄 signalfd.h(1.07 KB)
📄 smb.h(1.18 KB)
📄 smb_fs.h(535 B)
📄 smb_mount.h(468 B)
📄 smbno.h(14.18 KB)
📄 snmp.h(10.9 KB)
📄 socket.h(738 B)
📄 sockios.h(5.83 KB)
📄 som.h(5.35 KB)
📄 sonet.h(2.16 KB)
📄 sonypi.h(5.02 KB)
📄 sound.h(1.07 KB)
📄 soundcard.h(44.94 KB)
📁 spi
📄 stat.h(1005 B)
📄 stddef.h(633 B)
📄 string.h(175 B)
📁 sunrpc
📄 suspend_ioctls.h(1.34 KB)
📄 swab.h(6.14 KB)
📄 synclink.h(8.49 KB)
📄 sysctl.h(25.87 KB)
📄 taskstats.h(6.78 KB)
📁 tc_act
📁 tc_ematch
📄 tcp.h(5.08 KB)
📄 telephony.h(8.84 KB)
📄 termios.h(544 B)
📄 time.h(1.7 KB)
📄 times.h(215 B)
📄 timex.h(6.08 KB)
📄 tiocl.h(1.63 KB)
📄 tipc.h(5.77 KB)
📄 tipc_config.h(15.01 KB)
📄 toshiba.h(1.25 KB)
📄 tty.h(128 B)
📄 types.h(991 B)
📄 udf_fs_i.h(634 B)
📄 udp.h(1.14 KB)
📄 uinput.h(5 KB)
📄 uio.h(648 B)
📄 ultrasound.h(4.39 KB)
📄 un.h(203 B)
📄 unistd.h(157 B)
📁 usb
📄 usbdevice_fs.h(5.21 KB)
📄 utime.h(152 B)
📄 utsname.h(606 B)
📄 uuid.h(1.73 KB)
📄 version.h(281 B)
📄 veth.h(474 B)
📄 vhost.h(4.46 KB)
📄 videodev.h(10.27 KB)
📄 videodev2.h(64.52 KB)
📄 videotext.h(4.14 KB)
📄 virtio_9p.h(351 B)
📄 virtio_balloon.h(1.23 KB)
📄 virtio_blk.h(2.91 KB)
📄 virtio_config.h(1.25 KB)
📄 virtio_console.h(1.37 KB)
📄 virtio_ids.h(545 B)
📄 virtio_net.h(6.86 KB)
📄 virtio_pci.h(2.21 KB)
📄 virtio_ring.h(4.38 KB)
📄 virtio_rng.h(265 B)
📄 vt.h(3 KB)
📄 wait.h(580 B)
📄 wanrouter.h(17.42 KB)
📄 watchdog.h(2.34 KB)
📁 wimax
📄 wimax.h(8.17 KB)
📄 wireless.h(41.65 KB)
📄 x25.h(3.34 KB)
📄 xattr.h(646 B)
📄 xfrm.h(10.31 KB)

Editing: ext2_fs.h

/*
 *  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_EXT2_FS_H
#define _LINUX_EXT2_FS_H

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

/*
 * The second extended filesystem constants/structures
 */

/*
 * Define EXT2FS_DEBUG to produce debug messages
 */
#undef EXT2FS_DEBUG

/*
 * Define EXT2_RESERVATION to reserve data blocks for expanding files
 */
#define EXT2_DEFAULT_RESERVE_BLOCKS     8
/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
#define EXT2_MAX_RESERVE_BLOCKS         1027
#define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0
/*
 * The second extended file system version
 */
#define EXT2FS_DATE		"95/08/09"
#define EXT2FS_VERSION		"0.5b"

/*
 * Debug code
 */
#ifdef EXT2FS_DEBUG
#	define ext2_debug(f, a...)	{ \
					printk ("EXT2-fs DEBUG (%s, %d): %s:", \
						__FILE__, __LINE__, __func__); \
				  	printk (f, ## a); \
					}
#else
#	define ext2_debug(f, a...)	/**/
#endif

/*
 * Special inode numbers
 */
#define	EXT2_BAD_INO		 1	/* Bad blocks inode */
#define EXT2_ROOT_INO		 2	/* Root inode */
#define EXT2_BOOT_LOADER_INO	 5	/* Boot loader inode */
#define EXT2_UNDEL_DIR_INO	 6	/* Undelete directory inode */

/* First non-reserved inode for old ext2 filesystems */
#define EXT2_GOOD_OLD_FIRST_INO	11

/* Assume that user mode programs are passing in an ext2fs superblock, not
 * a kernel struct super_block.  This will allow us to call the feature-test
 * macros from user land. */
#define EXT2_SB(sb)	(sb)

/*
 * Maximal count of links to a file
 */
#define EXT2_LINK_MAX		32000

/*
 * Macro-instructions used to manage several block sizes
 */
#define EXT2_MIN_BLOCK_SIZE		1024
#define	EXT2_MAX_BLOCK_SIZE		4096
#define EXT2_MIN_BLOCK_LOG_SIZE		  10
# define EXT2_BLOCK_SIZE(s)		(EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
#define	EXT2_ADDR_PER_BLOCK(s)		(EXT2_BLOCK_SIZE(s) / sizeof (__u32))
# define EXT2_BLOCK_SIZE_BITS(s)	((s)->s_log_block_size + 10)
#define EXT2_INODE_SIZE(s)	(((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
				 EXT2_GOOD_OLD_INODE_SIZE : \
				 (s)->s_inode_size)
#define EXT2_FIRST_INO(s)	(((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
				 EXT2_GOOD_OLD_FIRST_INO : \
				 (s)->s_first_ino)

/*
 * Macro-instructions used to manage fragments
 */
#define EXT2_MIN_FRAG_SIZE		1024
#define	EXT2_MAX_FRAG_SIZE		4096
#define EXT2_MIN_FRAG_LOG_SIZE		  10
# define EXT2_FRAG_SIZE(s)		(EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
# define EXT2_FRAGS_PER_BLOCK(s)	(EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))

/*
 * Structure of a blocks group descriptor
 */
struct ext2_group_desc
{
	__le32	bg_block_bitmap;		/* Blocks bitmap block */
	__le32	bg_inode_bitmap;		/* Inodes bitmap block */
	__le32	bg_inode_table;		/* Inodes table block */
	__le16	bg_free_blocks_count;	/* Free blocks count */
	__le16	bg_free_inodes_count;	/* Free inodes count */
	__le16	bg_used_dirs_count;	/* Directories count */
	__le16	bg_pad;
	__le32	bg_reserved[3];
};

/*
 * Macro-instructions used to manage group descriptors
 */
# define EXT2_BLOCKS_PER_GROUP(s)	((s)->s_blocks_per_group)
# define EXT2_DESC_PER_BLOCK(s)		(EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
# define EXT2_INODES_PER_GROUP(s)	((s)->s_inodes_per_group)

/*
 * Constants relative to the data blocks
 */
#define	EXT2_NDIR_BLOCKS		12
#define	EXT2_IND_BLOCK			EXT2_NDIR_BLOCKS
#define	EXT2_DIND_BLOCK			(EXT2_IND_BLOCK + 1)
#define	EXT2_TIND_BLOCK			(EXT2_DIND_BLOCK + 1)
#define	EXT2_N_BLOCKS			(EXT2_TIND_BLOCK + 1)

/*
 * Inode flags (GETFLAGS/SETFLAGS)
 */
#define	EXT2_SECRM_FL			FS_SECRM_FL	/* Secure deletion */
#define	EXT2_UNRM_FL			FS_UNRM_FL	/* Undelete */
#define	EXT2_COMPR_FL			FS_COMPR_FL	/* Compress file */
#define EXT2_SYNC_FL			FS_SYNC_FL	/* Synchronous updates */
#define EXT2_IMMUTABLE_FL		FS_IMMUTABLE_FL	/* Immutable file */
#define EXT2_APPEND_FL			FS_APPEND_FL	/* writes to file may only append */
#define EXT2_NODUMP_FL			FS_NODUMP_FL	/* do not dump file */
#define EXT2_NOATIME_FL			FS_NOATIME_FL	/* do not update atime */
/* Reserved for compression usage... */
#define EXT2_DIRTY_FL			FS_DIRTY_FL
#define EXT2_COMPRBLK_FL		FS_COMPRBLK_FL	/* One or more compressed clusters */
#define EXT2_NOCOMP_FL			FS_NOCOMP_FL	/* Don't compress */
#define EXT2_ECOMPR_FL			FS_ECOMPR_FL	/* Compression error */
/* End compression flags --- maybe not all used */	
#define EXT2_BTREE_FL			FS_BTREE_FL	/* btree format dir */
#define EXT2_INDEX_FL			FS_INDEX_FL	/* hash-indexed directory */
#define EXT2_IMAGIC_FL			FS_IMAGIC_FL	/* AFS directory */
#define EXT2_JOURNAL_DATA_FL		FS_JOURNAL_DATA_FL /* Reserved for ext3 */
#define EXT2_NOTAIL_FL			FS_NOTAIL_FL	/* file tail should not be merged */
#define EXT2_DIRSYNC_FL			FS_DIRSYNC_FL	/* dirsync behaviour (directories only) */
#define EXT2_TOPDIR_FL			FS_TOPDIR_FL	/* Top of directory hierarchies*/
#define EXT2_RESERVED_FL		FS_RESERVED_FL	/* reserved for ext2 lib */

#define EXT2_FL_USER_VISIBLE		FS_FL_USER_VISIBLE	/* User visible flags */
#define EXT2_FL_USER_MODIFIABLE		FS_FL_USER_MODIFIABLE	/* User modifiable flags */

/* Flags that should be inherited by new inodes from their parent. */
#define EXT2_FL_INHERITED (EXT2_SECRM_FL | EXT2_UNRM_FL | EXT2_COMPR_FL |\
			   EXT2_SYNC_FL | EXT2_NODUMP_FL |\
			   EXT2_NOATIME_FL | EXT2_COMPRBLK_FL |\
			   EXT2_NOCOMP_FL | EXT2_JOURNAL_DATA_FL |\
			   EXT2_NOTAIL_FL | EXT2_DIRSYNC_FL)

/* Flags that are appropriate for regular files (all but dir-specific ones). */
#define EXT2_REG_FLMASK (~(EXT2_DIRSYNC_FL | EXT2_TOPDIR_FL))

/* Flags that are appropriate for non-directories/regular files. */
#define EXT2_OTHER_FLMASK (EXT2_NODUMP_FL | EXT2_NOATIME_FL)

/* Mask out flags that are inappropriate for the given type of inode. */
static __inline__ __u32 ext2_mask_flags(umode_t mode, __u32 flags)
{
	if (S_ISDIR(mode))
		return flags;
	else if (S_ISREG(mode))
		return flags & EXT2_REG_FLMASK;
	else
		return flags & EXT2_OTHER_FLMASK;
}

/*
 * ioctl commands
 */
#define	EXT2_IOC_GETFLAGS		FS_IOC_GETFLAGS
#define	EXT2_IOC_SETFLAGS		FS_IOC_SETFLAGS
#define	EXT2_IOC_GETVERSION		FS_IOC_GETVERSION
#define	EXT2_IOC_SETVERSION		FS_IOC_SETVERSION
#define	EXT2_IOC_GETRSVSZ		_IOR('f', 5, long)
#define	EXT2_IOC_SETRSVSZ		_IOW('f', 6, long)

/*
 * ioctl commands in 32 bit emulation
 */
#define EXT2_IOC32_GETFLAGS		FS_IOC32_GETFLAGS
#define EXT2_IOC32_SETFLAGS		FS_IOC32_SETFLAGS
#define EXT2_IOC32_GETVERSION		FS_IOC32_GETVERSION
#define EXT2_IOC32_SETVERSION		FS_IOC32_SETVERSION

/*
 * Structure of an inode on the disk
 */
struct ext2_inode {
	__le16	i_mode;		/* File mode */
	__le16	i_uid;		/* Low 16 bits of Owner Uid */
	__le32	i_size;		/* Size in bytes */
	__le32	i_atime;	/* Access time */
	__le32	i_ctime;	/* Creation time */
	__le32	i_mtime;	/* Modification time */
	__le32	i_dtime;	/* Deletion Time */
	__le16	i_gid;		/* Low 16 bits of Group Id */
	__le16	i_links_count;	/* Links count */
	__le32	i_blocks;	/* Blocks count */
	__le32	i_flags;	/* File flags */
	union {
		struct {
			__le32  l_i_reserved1;
		} linux1;
		struct {
			__le32  h_i_translator;
		} hurd1;
		struct {
			__le32  m_i_reserved1;
		} masix1;
	} osd1;				/* OS dependent 1 */
	__le32	i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
	__le32	i_generation;	/* File version (for NFS) */
	__le32	i_file_acl;	/* File ACL */
	__le32	i_dir_acl;	/* Directory ACL */
	__le32	i_faddr;	/* Fragment address */
	union {
		struct {
			__u8	l_i_frag;	/* Fragment number */
			__u8	l_i_fsize;	/* Fragment size */
			__u16	i_pad1;
			__le16	l_i_uid_high;	/* these 2 fields    */
			__le16	l_i_gid_high;	/* were reserved2[0] */
			__u32	l_i_reserved2;
		} linux2;
		struct {
			__u8	h_i_frag;	/* Fragment number */
			__u8	h_i_fsize;	/* Fragment size */
			__le16	h_i_mode_high;
			__le16	h_i_uid_high;
			__le16	h_i_gid_high;
			__le32	h_i_author;
		} hurd2;
		struct {
			__u8	m_i_frag;	/* Fragment number */
			__u8	m_i_fsize;	/* Fragment size */
			__u16	m_pad1;
			__u32	m_i_reserved2[2];
		} masix2;
	} osd2;				/* OS dependent 2 */
};

#define i_size_high	i_dir_acl

#if defined(__KERNEL__) || defined(__linux__)
#define i_reserved1	osd1.linux1.l_i_reserved1
#define i_frag		osd2.linux2.l_i_frag
#define i_fsize		osd2.linux2.l_i_fsize
#define i_uid_low	i_uid
#define i_gid_low	i_gid
#define i_uid_high	osd2.linux2.l_i_uid_high
#define i_gid_high	osd2.linux2.l_i_gid_high
#define i_reserved2	osd2.linux2.l_i_reserved2
#endif

#ifdef	__hurd__
#define i_translator	osd1.hurd1.h_i_translator
#define i_frag		osd2.hurd2.h_i_frag
#define i_fsize		osd2.hurd2.h_i_fsize
#define i_uid_high	osd2.hurd2.h_i_uid_high
#define i_gid_high	osd2.hurd2.h_i_gid_high
#define i_author	osd2.hurd2.h_i_author
#endif

#ifdef	__masix__
#define i_reserved1	osd1.masix1.m_i_reserved1
#define i_frag		osd2.masix2.m_i_frag
#define i_fsize		osd2.masix2.m_i_fsize
#define i_reserved2	osd2.masix2.m_i_reserved2
#endif

/*
 * File system states
 */
#define	EXT2_VALID_FS			0x0001	/* Unmounted cleanly */
#define	EXT2_ERROR_FS			0x0002	/* Errors detected */
#define	EFSCORRUPTED			EUCLEAN /* Filesystem is corrupted */

/*
 * Mount flags
 */
#define EXT2_MOUNT_CHECK		0x000001  /* Do mount-time checks */
#define EXT2_MOUNT_OLDALLOC		0x000002  /* Don't use the new Orlov allocator */
#define EXT2_MOUNT_GRPID		0x000004  /* Create files with directory's group */
#define EXT2_MOUNT_DEBUG		0x000008  /* Some debugging messages */
#define EXT2_MOUNT_ERRORS_CONT		0x000010  /* Continue on errors */
#define EXT2_MOUNT_ERRORS_RO		0x000020  /* Remount fs ro on errors */
#define EXT2_MOUNT_ERRORS_PANIC		0x000040  /* Panic on errors */
#define EXT2_MOUNT_MINIX_DF		0x000080  /* Mimics the Minix statfs */
#define EXT2_MOUNT_NOBH			0x000100  /* No buffer_heads */
#define EXT2_MOUNT_NO_UID32		0x000200  /* Disable 32-bit UIDs */
#define EXT2_MOUNT_XATTR_USER		0x004000  /* Extended user attributes */
#define EXT2_MOUNT_POSIX_ACL		0x008000  /* POSIX Access Control Lists */
#define EXT2_MOUNT_XIP			0x010000  /* Execute in place */
#define EXT2_MOUNT_USRQUOTA		0x020000  /* user quota */
#define EXT2_MOUNT_GRPQUOTA		0x040000  /* group quota */
#define EXT2_MOUNT_RESERVATION		0x080000  /* Preallocation */

#define clear_opt(o, opt)		o &= ~EXT2_MOUNT_##opt
#define set_opt(o, opt)			o |= EXT2_MOUNT_##opt
#define test_opt(sb, opt)		(EXT2_SB(sb)->s_mount_opt & \
					 EXT2_MOUNT_##opt)
/*
 * Maximal mount counts between two filesystem checks
 */
#define EXT2_DFL_MAX_MNT_COUNT		20	/* Allow 20 mounts */
#define EXT2_DFL_CHECKINTERVAL		0	/* Don't use interval check */

/*
 * Behaviour when detecting errors
 */
#define EXT2_ERRORS_CONTINUE		1	/* Continue execution */
#define EXT2_ERRORS_RO			2	/* Remount fs read-only */
#define EXT2_ERRORS_PANIC		3	/* Panic */
#define EXT2_ERRORS_DEFAULT		EXT2_ERRORS_CONTINUE

/*
 * Structure of the super block
 */
struct ext2_super_block {
	__le32	s_inodes_count;		/* Inodes count */
	__le32	s_blocks_count;		/* Blocks count */
	__le32	s_r_blocks_count;	/* Reserved blocks count */
	__le32	s_free_blocks_count;	/* Free blocks count */
	__le32	s_free_inodes_count;	/* Free inodes count */
	__le32	s_first_data_block;	/* First Data Block */
	__le32	s_log_block_size;	/* Block size */
	__le32	s_log_frag_size;	/* Fragment size */
	__le32	s_blocks_per_group;	/* # Blocks per group */
	__le32	s_frags_per_group;	/* # Fragments per group */
	__le32	s_inodes_per_group;	/* # Inodes per group */
	__le32	s_mtime;		/* Mount time */
	__le32	s_wtime;		/* Write time */
	__le16	s_mnt_count;		/* Mount count */
	__le16	s_max_mnt_count;	/* Maximal mount count */
	__le16	s_magic;		/* Magic signature */
	__le16	s_state;		/* File system state */
	__le16	s_errors;		/* Behaviour when detecting errors */
	__le16	s_minor_rev_level; 	/* minor revision level */
	__le32	s_lastcheck;		/* time of last check */
	__le32	s_checkinterval;	/* max. time between checks */
	__le32	s_creator_os;		/* OS */
	__le32	s_rev_level;		/* Revision level */
	__le16	s_def_resuid;		/* Default uid for reserved blocks */
	__le16	s_def_resgid;		/* Default gid for reserved blocks */
	/*
	 * These fields are for EXT2_DYNAMIC_REV superblocks only.
	 *
	 * Note: the difference between the compatible feature set and
	 * the incompatible feature set is that 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.
	 * 
	 * e2fsck's requirements are more strict; if it doesn't know
	 * about a feature in either the compatible or incompatible
	 * feature set, it must abort and not try to meddle with
	 * things it doesn't understand...
	 */
	__le32	s_first_ino; 		/* First non-reserved inode */
	__le16   s_inode_size; 		/* size of inode structure */
	__le16	s_block_group_nr; 	/* block group # of this superblock */
	__le32	s_feature_compat; 	/* compatible feature set */
	__le32	s_feature_incompat; 	/* incompatible feature set */
	__le32	s_feature_ro_compat; 	/* readonly-compatible feature set */
	__u8	s_uuid[16];		/* 128-bit uuid for volume */
	char	s_volume_name[16]; 	/* volume name */
	char	s_last_mounted[64]; 	/* directory where last mounted */
	__le32	s_algorithm_usage_bitmap; /* For compression */
	/*
	 * Performance hints.  Directory preallocation should only
	 * happen if the EXT2_COMPAT_PREALLOC flag is on.
	 */
	__u8	s_prealloc_blocks;	/* Nr of blocks to try to preallocate*/
	__u8	s_prealloc_dir_blocks;	/* Nr to preallocate for dirs */
	__u16	s_padding1;
	/*
	 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
	 */
	__u8	s_journal_uuid[16];	/* uuid of journal superblock */
	__u32	s_journal_inum;		/* inode number of journal file */
	__u32	s_journal_dev;		/* device number of journal file */
	__u32	s_last_orphan;		/* start of list of inodes to delete */
	__u32	s_hash_seed[4];		/* HTREE hash seed */
	__u8	s_def_hash_version;	/* Default hash version to use */
	__u8	s_reserved_char_pad;
	__u16	s_reserved_word_pad;
	__le32	s_default_mount_opts;
 	__le32	s_first_meta_bg; 	/* First metablock block group */
	__u32	s_reserved[190];	/* Padding to the end of the block */
};

/*
 * Codes for operating systems
 */
#define EXT2_OS_LINUX		0
#define EXT2_OS_HURD		1
#define EXT2_OS_MASIX		2
#define EXT2_OS_FREEBSD		3
#define EXT2_OS_LITES		4

/*
 * Revision levels
 */
#define EXT2_GOOD_OLD_REV	0	/* The good old (original) format */
#define EXT2_DYNAMIC_REV	1 	/* V2 format w/ dynamic inode sizes */

#define EXT2_CURRENT_REV	EXT2_GOOD_OLD_REV
#define EXT2_MAX_SUPP_REV	EXT2_DYNAMIC_REV

#define EXT2_GOOD_OLD_INODE_SIZE 128

/*
 * Feature set definitions
 */

#define EXT2_HAS_COMPAT_FEATURE(sb,mask)			\
	( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask)			\
	( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask)			\
	( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
#define EXT2_SET_COMPAT_FEATURE(sb,mask)			\
	EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
#define EXT2_SET_RO_COMPAT_FEATURE(sb,mask)			\
	EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
#define EXT2_SET_INCOMPAT_FEATURE(sb,mask)			\
	EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
#define EXT2_CLEAR_COMPAT_FEATURE(sb,mask)			\
	EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
#define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask)			\
	EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
#define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask)			\
	EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)

#define EXT2_FEATURE_COMPAT_DIR_PREALLOC	0x0001
#define EXT2_FEATURE_COMPAT_IMAGIC_INODES	0x0002
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL		0x0004
#define EXT2_FEATURE_COMPAT_EXT_ATTR		0x0008
#define EXT2_FEATURE_COMPAT_RESIZE_INO		0x0010
#define EXT2_FEATURE_COMPAT_DIR_INDEX		0x0020
#define EXT2_FEATURE_COMPAT_ANY			0xffffffff

#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER	0x0001
#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE	0x0002
#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR	0x0004
#define EXT2_FEATURE_RO_COMPAT_ANY		0xffffffff

#define EXT2_FEATURE_INCOMPAT_COMPRESSION	0x0001
#define EXT2_FEATURE_INCOMPAT_FILETYPE		0x0002
#define EXT3_FEATURE_INCOMPAT_RECOVER		0x0004
#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV	0x0008
#define EXT2_FEATURE_INCOMPAT_META_BG		0x0010
#define EXT2_FEATURE_INCOMPAT_ANY		0xffffffff

#define EXT2_FEATURE_COMPAT_SUPP	EXT2_FEATURE_COMPAT_EXT_ATTR
#define EXT2_FEATURE_INCOMPAT_SUPP	(EXT2_FEATURE_INCOMPAT_FILETYPE| \
					 EXT2_FEATURE_INCOMPAT_META_BG)
#define EXT2_FEATURE_RO_COMPAT_SUPP	(EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
					 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
					 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
#define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED	~EXT2_FEATURE_RO_COMPAT_SUPP
#define EXT2_FEATURE_INCOMPAT_UNSUPPORTED	~EXT2_FEATURE_INCOMPAT_SUPP

/*
 * Default values for user and/or group using reserved blocks
 */
#define	EXT2_DEF_RESUID		0
#define	EXT2_DEF_RESGID		0

/*
 * Default mount options
 */
#define EXT2_DEFM_DEBUG		0x0001
#define EXT2_DEFM_BSDGROUPS	0x0002
#define EXT2_DEFM_XATTR_USER	0x0004
#define EXT2_DEFM_ACL		0x0008
#define EXT2_DEFM_UID16		0x0010
    /* Not used by ext2, but reserved for use by ext3 */
#define EXT3_DEFM_JMODE		0x0060 
#define EXT3_DEFM_JMODE_DATA	0x0020
#define EXT3_DEFM_JMODE_ORDERED	0x0040
#define EXT3_DEFM_JMODE_WBACK	0x0060

/*
 * Structure of a directory entry
 */
#define EXT2_NAME_LEN 255

struct ext2_dir_entry {
	__le32	inode;			/* Inode number */
	__le16	rec_len;		/* Directory entry length */
	__le16	name_len;		/* Name length */
	char	name[EXT2_NAME_LEN];	/* File name */
};

/*
 * The new version of the directory entry.  Since EXT2 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 ext2_dir_entry_2 {
	__le32	inode;			/* Inode number */
	__le16	rec_len;		/* Directory entry length */
	__u8	name_len;		/* Name length */
	__u8	file_type;
	char	name[EXT2_NAME_LEN];	/* File name */
};

/*
 * Ext2 directory file types.  Only the low 3 bits are used.  The
 * other bits are reserved for now.
 */
enum {
	EXT2_FT_UNKNOWN,
	EXT2_FT_REG_FILE,
	EXT2_FT_DIR,
	EXT2_FT_CHRDEV,
	EXT2_FT_BLKDEV,
	EXT2_FT_FIFO,
	EXT2_FT_SOCK,
	EXT2_FT_SYMLINK,
	EXT2_FT_MAX
};

/*
 * EXT2_DIR_PAD defines the directory entries boundaries
 *
 * NOTE: It must be a multiple of 4
 */
#define EXT2_DIR_PAD		 	4
#define EXT2_DIR_ROUND 			(EXT2_DIR_PAD - 1)
#define EXT2_DIR_REC_LEN(name_len)	(((name_len) + 8 + EXT2_DIR_ROUND) & \
					 ~EXT2_DIR_ROUND)
#define EXT2_MAX_REC_LEN		((1<<16)-1)

#endif	/* _LINUX_EXT2_FS_H */

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