LXR linux/include/uapi/linux/fcntl.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2#ifndef _UAPI_LINUX_FCNTL_H
   3#define _UAPI_LINUX_FCNTL_H
   4
   5#include <asm/fcntl.h>
   6#include <linux/openat2.h>
   7
   8#define F_SETLEASE      (F_LINUX_SPECIFIC_BASE + 0)
   9#define F_GETLEASE      (F_LINUX_SPECIFIC_BASE + 1)
  10
  11/*
  12 * Cancel a blocking posix lock; internal use only until we expose an
  13 * asynchronous lock api to userspace:
  14 */
  15#define F_CANCELLK      (F_LINUX_SPECIFIC_BASE + 5)
  16
  17/* Create a file descriptor with FD_CLOEXEC set. */
  18#define F_DUPFD_CLOEXEC (F_LINUX_SPECIFIC_BASE + 6)
  19
  20/*
  21 * Request nofications on a directory.
  22 * See below for events that may be notified.
  23 */
  24#define F_NOTIFY        (F_LINUX_SPECIFIC_BASE+2)
  25
  26/*
  27 * Set and get of pipe page size array
  28 */
  29#define F_SETPIPE_SZ    (F_LINUX_SPECIFIC_BASE + 7)
  30#define F_GETPIPE_SZ    (F_LINUX_SPECIFIC_BASE + 8)
  31
  32/*
  33 * Set/Get seals
  34 */
  35#define F_ADD_SEALS     (F_LINUX_SPECIFIC_BASE + 9)
  36#define F_GET_SEALS     (F_LINUX_SPECIFIC_BASE + 10)
  37
  38/*
  39 * Types of seals
  40 */
  41#define F_SEAL_SEAL     0x0001  /* prevent further seals from being set */
  42#define F_SEAL_SHRINK   0x0002  /* prevent file from shrinking */
  43#define F_SEAL_GROW     0x0004  /* prevent file from growing */
  44#define F_SEAL_WRITE    0x0008  /* prevent writes */
  45#define F_SEAL_FUTURE_WRITE     0x0010  /* prevent future writes while mapped */
  46/* (1U << 31) is reserved for signed error codes */
  47
  48/*
  49 * Set/Get write life time hints. {GET,SET}_RW_HINT operate on the
  50 * underlying inode, while {GET,SET}_FILE_RW_HINT operate only on
  51 * the specific file.
  52 */
  53#define F_GET_RW_HINT           (F_LINUX_SPECIFIC_BASE + 11)
  54#define F_SET_RW_HINT           (F_LINUX_SPECIFIC_BASE + 12)
  55#define F_GET_FILE_RW_HINT      (F_LINUX_SPECIFIC_BASE + 13)
  56#define F_SET_FILE_RW_HINT      (F_LINUX_SPECIFIC_BASE + 14)
  57
  58/*
  59 * Valid hint values for F_{GET,SET}_RW_HINT. 0 is "not set", or can be
  60 * used to clear any hints previously set.
  61 */
  62#define RWH_WRITE_LIFE_NOT_SET  0
  63#define RWH_WRITE_LIFE_NONE     1
  64#define RWH_WRITE_LIFE_SHORT    2
  65#define RWH_WRITE_LIFE_MEDIUM   3
  66#define RWH_WRITE_LIFE_LONG     4
  67#define RWH_WRITE_LIFE_EXTREME  5
  68
  69/*
  70 * The originally introduced spelling is remained from the first
  71 * versions of the patch set that introduced the feature, see commit
  72 * v4.13-rc1~212^2~51.
  73 */
  74#define RWF_WRITE_LIFE_NOT_SET  RWH_WRITE_LIFE_NOT_SET
  75
  76/*
  77 * Types of directory notifications that may be requested.
  78 */
  79#define DN_ACCESS       0x00000001      /* File accessed */
  80#define DN_MODIFY       0x00000002      /* File modified */
  81#define DN_CREATE       0x00000004      /* File created */
  82#define DN_DELETE       0x00000008      /* File removed */
  83#define DN_RENAME       0x00000010      /* File renamed */
  84#define DN_ATTRIB       0x00000020      /* File changed attibutes */
  85#define DN_MULTISHOT    0x80000000      /* Don't remove notifier */
  86
  87/*
  88 * The constants AT_REMOVEDIR and AT_EACCESS have the same value.  AT_EACCESS is
  89 * meaningful only to faccessat, while AT_REMOVEDIR is meaningful only to
  90 * unlinkat.  The two functions do completely different things and therefore,
  91 * the flags can be allowed to overlap.  For example, passing AT_REMOVEDIR to
  92 * faccessat would be undefined behavior and thus treating it equivalent to
  93 * AT_EACCESS is valid undefined behavior.
  94 */
  95#define AT_FDCWD                -100    /* Special value used to indicate
  96                                           openat should use the current
  97                                           working directory. */
  98#define AT_SYMLINK_NOFOLLOW     0x100   /* Do not follow symbolic links.  */
  99#define AT_EACCESS              0x200   /* Test access permitted for
 100                                           effective IDs, not real IDs.  */
 101#define AT_REMOVEDIR            0x200   /* Remove directory instead of
 102                                           unlinking file.  */
 103#define AT_SYMLINK_FOLLOW       0x400   /* Follow symbolic links.  */
 104#define AT_NO_AUTOMOUNT         0x800   /* Suppress terminal automount traversal */
 105#define AT_EMPTY_PATH           0x1000  /* Allow empty relative pathname */
 106
 107#define AT_STATX_SYNC_TYPE      0x6000  /* Type of synchronisation required from statx() */
 108#define AT_STATX_SYNC_AS_STAT   0x0000  /* - Do whatever stat() does */
 109#define AT_STATX_FORCE_SYNC     0x2000  /* - Force the attributes to be sync'd with the server */
 110#define AT_STATX_DONT_SYNC      0x4000  /* - Don't sync attributes with the server */
 111
 112#define AT_RECURSIVE            0x8000  /* Apply to the entire subtree */
 113
 114#endif /* _UAPI_LINUX_FCNTL_H */
 115