UAPI: (Scripted) Disintegrate include/linux

[mirror_ubuntu-artful-kernel.git] / include / uapi / linux / fs.h

#ifndef _UAPI_LINUX_FS_H
#define _UAPI_LINUX_FS_H

/*
 * This file has definitions for some important file table
 * structures etc.
 */

#include <linux/limits.h>
#include <linux/ioctl.h>
#include <linux/types.h>

/*
 * It's silly to have NR_OPEN bigger than NR_FILE, but you can change
 * the file limit at runtime and only root can increase the per-process
 * nr_file rlimit, so it's safe to set up a ridiculously high absolute
 * upper limit on files-per-process.
 *
 * Some programs (notably those using select()) may have to be 
 * recompiled to take full advantage of the new limits..  
 */

/* Fixed constants first: */
#undef NR_OPEN
#define INR_OPEN_CUR 1024       /* Initial setting for nfile rlimits */
#define INR_OPEN_MAX 4096       /* Hard limit for nfile rlimits */

#define BLOCK_SIZE_BITS 10
#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)

#define SEEK_SET        0       /* seek relative to beginning of file */
#define SEEK_CUR        1       /* seek relative to current file position */
#define SEEK_END        2       /* seek relative to end of file */
#define SEEK_DATA       3       /* seek to the next data */
#define SEEK_HOLE       4       /* seek to the next hole */
#define SEEK_MAX        SEEK_HOLE

struct fstrim_range {
        __u64 start;
        __u64 len;
        __u64 minlen;
};

/* And dynamically-tunable limits and defaults: */
struct files_stat_struct {
        unsigned long nr_files;         /* read only */
        unsigned long nr_free_files;    /* read only */
        unsigned long max_files;                /* tunable */
};

struct inodes_stat_t {
        int nr_inodes;
        int nr_unused;
        int dummy[5];           /* padding for sysctl ABI compatibility */
};


#define NR_FILE  8192   /* this can well be larger on a larger system */

#define MAY_EXEC                0x00000001
#define MAY_WRITE               0x00000002
#define MAY_READ                0x00000004
#define MAY_APPEND              0x00000008
#define MAY_ACCESS              0x00000010
#define MAY_OPEN                0x00000020
#define MAY_CHDIR               0x00000040
/* called from RCU mode, don't block */
#define MAY_NOT_BLOCK           0x00000080

/*
 * flags in file.f_mode.  Note that FMODE_READ and FMODE_WRITE must correspond
 * to O_WRONLY and O_RDWR via the strange trick in __dentry_open()
 */

/* file is open for reading */
#define FMODE_READ              ((__force fmode_t)0x1)
/* file is open for writing */
#define FMODE_WRITE             ((__force fmode_t)0x2)
/* file is seekable */
#define FMODE_LSEEK             ((__force fmode_t)0x4)
/* file can be accessed using pread */
#define FMODE_PREAD             ((__force fmode_t)0x8)
/* file can be accessed using pwrite */
#define FMODE_PWRITE            ((__force fmode_t)0x10)
/* File is opened for execution with sys_execve / sys_uselib */
#define FMODE_EXEC              ((__force fmode_t)0x20)
/* File is opened with O_NDELAY (only set for block devices) */
#define FMODE_NDELAY            ((__force fmode_t)0x40)
/* File is opened with O_EXCL (only set for block devices) */
#define FMODE_EXCL              ((__force fmode_t)0x80)
/* File is opened using open(.., 3, ..) and is writeable only for ioctls
   (specialy hack for floppy.c) */
#define FMODE_WRITE_IOCTL       ((__force fmode_t)0x100)
/* 32bit hashes as llseek() offset (for directories) */
#define FMODE_32BITHASH         ((__force fmode_t)0x200)
/* 64bit hashes as llseek() offset (for directories) */
#define FMODE_64BITHASH         ((__force fmode_t)0x400)

/*
 * Don't update ctime and mtime.
 *
 * Currently a special hack for the XFS open_by_handle ioctl, but we'll
 * hopefully graduate it to a proper O_CMTIME flag supported by open(2) soon.
 */
#define FMODE_NOCMTIME          ((__force fmode_t)0x800)

/* Expect random access pattern */
#define FMODE_RANDOM            ((__force fmode_t)0x1000)

/* File is huge (eg. /dev/kmem): treat loff_t as unsigned */
#define FMODE_UNSIGNED_OFFSET   ((__force fmode_t)0x2000)

/* File is opened with O_PATH; almost nothing can be done with it */
#define FMODE_PATH              ((__force fmode_t)0x4000)

/* File was opened by fanotify and shouldn't generate fanotify events */
#define FMODE_NONOTIFY          ((__force fmode_t)0x1000000)

/*
 * Flag for rw_copy_check_uvector and compat_rw_copy_check_uvector
 * that indicates that they should check the contents of the iovec are
 * valid, but not check the memory that the iovec elements
 * points too.
 */
#define CHECK_IOVEC_ONLY -1

#define SEL_IN          1
#define SEL_OUT         2
#define SEL_EX          4

/* public flags for file_system_type */
#define FS_REQUIRES_DEV 1 
#define FS_BINARY_MOUNTDATA 2
#define FS_HAS_SUBTYPE 4
#define FS_REVAL_DOT    16384   /* Check the paths ".", ".." for staleness */
#define FS_RENAME_DOES_D_MOVE   32768   /* FS will handle d_move()
                                         * during rename() internally.
                                         */

/*
 * These are the fs-independent mount-flags: up to 32 flags are supported
 */
#define MS_RDONLY        1      /* Mount read-only */
#define MS_NOSUID        2      /* Ignore suid and sgid bits */
#define MS_NODEV         4      /* Disallow access to device special files */
#define MS_NOEXEC        8      /* Disallow program execution */
#define MS_SYNCHRONOUS  16      /* Writes are synced at once */
#define MS_REMOUNT      32      /* Alter flags of a mounted FS */
#define MS_MANDLOCK     64      /* Allow mandatory locks on an FS */
#define MS_DIRSYNC      128     /* Directory modifications are synchronous */
#define MS_NOATIME      1024    /* Do not update access times. */
#define MS_NODIRATIME   2048    /* Do not update directory access times */
#define MS_BIND         4096
#define MS_MOVE         8192
#define MS_REC          16384
#define MS_VERBOSE      32768   /* War is peace. Verbosity is silence.
                                   MS_VERBOSE is deprecated. */
#define MS_SILENT       32768
#define MS_POSIXACL     (1<<16) /* VFS does not apply the umask */
#define MS_UNBINDABLE   (1<<17) /* change to unbindable */
#define MS_PRIVATE      (1<<18) /* change to private */
#define MS_SLAVE        (1<<19) /* change to slave */
#define MS_SHARED       (1<<20) /* change to shared */
#define MS_RELATIME     (1<<21) /* Update atime relative to mtime/ctime. */
#define MS_KERNMOUNT    (1<<22) /* this is a kern_mount call */
#define MS_I_VERSION    (1<<23) /* Update inode I_version field */
#define MS_STRICTATIME  (1<<24) /* Always perform atime updates */
#define MS_NOSEC        (1<<28)
#define MS_BORN         (1<<29)
#define MS_ACTIVE       (1<<30)
#define MS_NOUSER       (1<<31)

/*
 * Superblock flags that can be altered by MS_REMOUNT
 */
#define MS_RMT_MASK     (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION)

/*
 * Old magic mount flag and mask
 */
#define MS_MGC_VAL 0xC0ED0000
#define MS_MGC_MSK 0xffff0000

/* Inode flags - they have nothing to superblock flags now */

#define S_SYNC          1       /* Writes are synced at once */
#define S_NOATIME       2       /* Do not update access times */
#define S_APPEND        4       /* Append-only file */
#define S_IMMUTABLE     8       /* Immutable file */
#define S_DEAD          16      /* removed, but still open directory */
#define S_NOQUOTA       32      /* Inode is not counted to quota */
#define S_DIRSYNC       64      /* Directory modifications are synchronous */
#define S_NOCMTIME      128     /* Do not update file c/mtime */
#define S_SWAPFILE      256     /* Do not truncate: swapon got its bmaps */
#define S_PRIVATE       512     /* Inode is fs-internal */
#define S_IMA           1024    /* Inode has an associated IMA struct */
#define S_AUTOMOUNT     2048    /* Automount/referral quasi-directory */
#define S_NOSEC         4096    /* no suid or xattr security attributes */

/*
 * Note that nosuid etc flags are inode-specific: setting some file-system
 * flags just means all the inodes inherit those flags by default. It might be
 * possible to override it selectively if you really wanted to with some
 * ioctl() that is not currently implemented.
 *
 * Exception: MS_RDONLY is always applied to the entire file system.
 *
 * Unfortunately, it is possible to change a filesystems flags with it mounted
 * with files in use.  This means that all of the inodes will not have their
 * i_flags updated.  Hence, i_flags no longer inherit the superblock mount
 * flags, so these have to be checked separately. -- rmk@arm.uk.linux.org
 */
#define __IS_FLG(inode,flg) ((inode)->i_sb->s_flags & (flg))

#define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY)
#define IS_SYNC(inode)          (__IS_FLG(inode, MS_SYNCHRONOUS) || \
                                        ((inode)->i_flags & S_SYNC))
#define IS_DIRSYNC(inode)       (__IS_FLG(inode, MS_SYNCHRONOUS|MS_DIRSYNC) || \
                                        ((inode)->i_flags & (S_SYNC|S_DIRSYNC)))
#define IS_MANDLOCK(inode)      __IS_FLG(inode, MS_MANDLOCK)
#define IS_NOATIME(inode)   __IS_FLG(inode, MS_RDONLY|MS_NOATIME)
#define IS_I_VERSION(inode)   __IS_FLG(inode, MS_I_VERSION)

#define IS_NOQUOTA(inode)       ((inode)->i_flags & S_NOQUOTA)
#define IS_APPEND(inode)        ((inode)->i_flags & S_APPEND)
#define IS_IMMUTABLE(inode)     ((inode)->i_flags & S_IMMUTABLE)
#define IS_POSIXACL(inode)      __IS_FLG(inode, MS_POSIXACL)

#define IS_DEADDIR(inode)       ((inode)->i_flags & S_DEAD)
#define IS_NOCMTIME(inode)      ((inode)->i_flags & S_NOCMTIME)
#define IS_SWAPFILE(inode)      ((inode)->i_flags & S_SWAPFILE)
#define IS_PRIVATE(inode)       ((inode)->i_flags & S_PRIVATE)
#define IS_IMA(inode)           ((inode)->i_flags & S_IMA)
#define IS_AUTOMOUNT(inode)     ((inode)->i_flags & S_AUTOMOUNT)
#define IS_NOSEC(inode)         ((inode)->i_flags & S_NOSEC)

/* the read-only stuff doesn't really belong here, but any other place is
   probably as bad and I don't want to create yet another include file. */

#define BLKROSET   _IO(0x12,93) /* set device read-only (0 = read-write) */
#define BLKROGET   _IO(0x12,94) /* get read-only status (0 = read_write) */
#define BLKRRPART  _IO(0x12,95) /* re-read partition table */
#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */
#define BLKFLSBUF  _IO(0x12,97) /* flush buffer cache */
#define BLKRASET   _IO(0x12,98) /* set read ahead for block device */
#define BLKRAGET   _IO(0x12,99) /* get current read ahead setting */
#define BLKFRASET  _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
#define BLKFRAGET  _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
#define BLKSSZGET  _IO(0x12,104)/* get block device sector size */
#if 0
#define BLKPG      _IO(0x12,105)/* See blkpg.h */

/* Some people are morons.  Do not use sizeof! */

#define BLKELVGET  _IOR(0x12,106,size_t)/* elevator get */
#define BLKELVSET  _IOW(0x12,107,size_t)/* elevator set */
/* This was here just to show that the number is taken -
   probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */
#endif
/* A jump here: 108-111 have been used for various private purposes. */
#define BLKBSZGET  _IOR(0x12,112,size_t)
#define BLKBSZSET  _IOW(0x12,113,size_t)
#define BLKGETSIZE64 _IOR(0x12,114,size_t)      /* return device size in bytes (u64 *arg) */
#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
#define BLKTRACESTART _IO(0x12,116)
#define BLKTRACESTOP _IO(0x12,117)
#define BLKTRACETEARDOWN _IO(0x12,118)
#define BLKDISCARD _IO(0x12,119)
#define BLKIOMIN _IO(0x12,120)
#define BLKIOOPT _IO(0x12,121)
#define BLKALIGNOFF _IO(0x12,122)
#define BLKPBSZGET _IO(0x12,123)
#define BLKDISCARDZEROES _IO(0x12,124)
#define BLKSECDISCARD _IO(0x12,125)
#define BLKROTATIONAL _IO(0x12,126)
#define BLKZEROOUT _IO(0x12,127)

#define BMAP_IOCTL 1            /* obsolete - kept for compatibility */
#define FIBMAP     _IO(0x00,1)  /* bmap access */
#define FIGETBSZ   _IO(0x00,2)  /* get the block size used for bmap */
#define FIFREEZE        _IOWR('X', 119, int)    /* Freeze */
#define FITHAW          _IOWR('X', 120, int)    /* Thaw */
#define FITRIM          _IOWR('X', 121, struct fstrim_range)    /* Trim */

#define FS_IOC_GETFLAGS                 _IOR('f', 1, long)
#define FS_IOC_SETFLAGS                 _IOW('f', 2, long)
#define FS_IOC_GETVERSION               _IOR('v', 1, long)
#define FS_IOC_SETVERSION               _IOW('v', 2, long)
#define FS_IOC_FIEMAP                   _IOWR('f', 11, struct fiemap)
#define FS_IOC32_GETFLAGS               _IOR('f', 1, int)
#define FS_IOC32_SETFLAGS               _IOW('f', 2, int)
#define FS_IOC32_GETVERSION             _IOR('v', 1, int)
#define FS_IOC32_SETVERSION             _IOW('v', 2, int)

/*
 * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
 */
#define FS_SECRM_FL                     0x00000001 /* Secure deletion */
#define FS_UNRM_FL                      0x00000002 /* Undelete */
#define FS_COMPR_FL                     0x00000004 /* Compress file */
#define FS_SYNC_FL                      0x00000008 /* Synchronous updates */
#define FS_IMMUTABLE_FL                 0x00000010 /* Immutable file */
#define FS_APPEND_FL                    0x00000020 /* writes to file may only append */
#define FS_NODUMP_FL                    0x00000040 /* do not dump file */
#define FS_NOATIME_FL                   0x00000080 /* do not update atime */
/* Reserved for compression usage... */
#define FS_DIRTY_FL                     0x00000100
#define FS_COMPRBLK_FL                  0x00000200 /* One or more compressed clusters */
#define FS_NOCOMP_FL                    0x00000400 /* Don't compress */
#define FS_ECOMPR_FL                    0x00000800 /* Compression error */
/* End compression flags --- maybe not all used */
#define FS_BTREE_FL                     0x00001000 /* btree format dir */
#define FS_INDEX_FL                     0x00001000 /* hash-indexed directory */
#define FS_IMAGIC_FL                    0x00002000 /* AFS directory */
#define FS_JOURNAL_DATA_FL              0x00004000 /* Reserved for ext3 */
#define FS_NOTAIL_FL                    0x00008000 /* file tail should not be merged */
#define FS_DIRSYNC_FL                   0x00010000 /* dirsync behaviour (directories only) */
#define FS_TOPDIR_FL                    0x00020000 /* Top of directory hierarchies*/
#define FS_EXTENT_FL                    0x00080000 /* Extents */
#define FS_DIRECTIO_FL                  0x00100000 /* Use direct i/o */
#define FS_NOCOW_FL                     0x00800000 /* Do not cow file */
#define FS_RESERVED_FL                  0x80000000 /* reserved for ext2 lib */

#define FS_FL_USER_VISIBLE              0x0003DFFF /* User visible flags */
#define FS_FL_USER_MODIFIABLE           0x000380FF /* User modifiable flags */


#define SYNC_FILE_RANGE_WAIT_BEFORE     1
#define SYNC_FILE_RANGE_WRITE           2
#define SYNC_FILE_RANGE_WAIT_AFTER      4

#endif /* _UAPI_LINUX_FS_H */