The C and C++ Include Header Files

/usr/include/x86_64-linux-gnu/sys/mount.h


$ cat -n /usr/include/x86_64-linux-gnu/sys/mount.h

     1	/* Header file for mounting/unmount Linux filesystems.
     2	   Copyright (C) 1996-2024 Free Software Foundation, Inc.
     3	   This file is part of the GNU C Library.
     4	
     5	   The GNU C Library is free software; you can redistribute it and/or
     6	   modify it under the terms of the GNU Lesser General Public
     7	   License as published by the Free Software Foundation; either
     8	   version 2.1 of the License, or (at your option) any later version.
     9	
    10	   The GNU C Library is distributed in the hope that it will be useful,
    11	   but WITHOUT ANY WARRANTY; without even the implied warranty of
    12	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13	   Lesser General Public License for more details.
    14	
    15	   You should have received a copy of the GNU Lesser General Public
    16	   License along with the GNU C Library; if not, see
    17	   <https://www.gnu.org/licenses/>.  */
    18	
    19	/* This is taken from /usr/include/linux/fs.h.  */
    20	
    21	#ifndef _SYS_MOUNT_H
    22	#define _SYS_MOUNT_H	1
    23	
    24	#include <fcntl.h>
    25	#include <features.h>
    26	#include <stdint.h>
    27	#include <stddef.h>
    28	#include <sys/ioctl.h>
    29	
    30	#ifdef __has_include
    31	# if __has_include ("linux/mount.h")
    32	#  include "linux/mount.h"
    33	# endif
    34	#endif
    35	
    36	
    37	#define BLOCK_SIZE_BITS	10
    38	#define BLOCK_SIZE	(1<<BLOCK_SIZE_BITS)
    39	
    40	
    41	/* These are the fs-independent mount-flags: up to 16 flags are
    42	   supported  */
    43	enum
    44	{
    45	#undef MS_RDONLY
    46	  MS_RDONLY = 1,		/* Mount read-only.  */
    47	#define MS_RDONLY	MS_RDONLY
    48	#undef MS_NOSUID
    49	  MS_NOSUID = 2,		/* Ignore suid and sgid bits.  */
    50	#define MS_NOSUID	MS_NOSUID
    51	#undef MS_NODEV
    52	  MS_NODEV = 4,			/* Disallow access to device special files.  */
    53	#define MS_NODEV	MS_NODEV
    54	#undef MS_NOEXEC
    55	  MS_NOEXEC = 8,		/* Disallow program execution.  */
    56	#define MS_NOEXEC	MS_NOEXEC
    57	#undef MS_SYNCHRONOUS
    58	  MS_SYNCHRONOUS = 16,		/* Writes are synced at once.  */
    59	#define MS_SYNCHRONOUS	MS_SYNCHRONOUS
    60	#undef MS_REMOUNT
    61	  MS_REMOUNT = 32,		/* Alter flags of a mounted FS.  */
    62	#define MS_REMOUNT	MS_REMOUNT
    63	#undef MS_MANDLOCK
    64	  MS_MANDLOCK = 64,		/* Allow mandatory locks on an FS.  */
    65	#define MS_MANDLOCK	MS_MANDLOCK
    66	#undef MS_DIRSYNC
    67	  MS_DIRSYNC = 128,		/* Directory modifications are synchronous.  */
    68	#define MS_DIRSYNC	MS_DIRSYNC
    69	#undef MS_NOSYMFOLLOW
    70	  MS_NOSYMFOLLOW = 256,		/* Do not follow symlinks.  */
    71	#define MS_NOSYMFOLLOW	MS_NOSYMFOLLOW
    72	#undef MS_NOATIME
    73	  MS_NOATIME = 1024,		/* Do not update access times.  */
    74	#define MS_NOATIME	MS_NOATIME
    75	#undef MS_NODIRATIME
    76	  MS_NODIRATIME = 2048,		/* Do not update directory access times.  */
    77	#define MS_NODIRATIME	MS_NODIRATIME
    78	#undef MS_BIND
    79	  MS_BIND = 4096,		/* Bind directory at different place.  */
    80	#define MS_BIND		MS_BIND
    81	#undef MS_MOVE
    82	  MS_MOVE = 8192,
    83	#define MS_MOVE		MS_MOVE
    84	#undef MS_REC
    85	  MS_REC = 16384,
    86	#define MS_REC		MS_REC
    87	#undef MS_SILENT
    88	  MS_SILENT = 32768,
    89	#define MS_SILENT	MS_SILENT
    90	#undef MS_POSIXACL
    91	  MS_POSIXACL = 1 << 16,	/* VFS does not apply the umask.  */
    92	#define MS_POSIXACL	MS_POSIXACL
    93	#undef MS_UNBINDABLE
    94	  MS_UNBINDABLE = 1 << 17,	/* Change to unbindable.  */
    95	#define MS_UNBINDABLE	MS_UNBINDABLE
    96	#undef MS_PRIVATE
    97	  MS_PRIVATE = 1 << 18,		/* Change to private.  */
    98	#define MS_PRIVATE	MS_PRIVATE
    99	#undef MS_SLAVE
   100	  MS_SLAVE = 1 << 19,		/* Change to slave.  */
   101	#define MS_SLAVE	MS_SLAVE
   102	#undef MS_SHARED
   103	  MS_SHARED = 1 << 20,		/* Change to shared.  */
   104	#define MS_SHARED	MS_SHARED
   105	#undef MS_RELATIME
   106	  MS_RELATIME = 1 << 21,	/* Update atime relative to mtime/ctime.  */
   107	#define MS_RELATIME	MS_RELATIME
   108	#undef MS_KERNMOUNT
   109	  MS_KERNMOUNT = 1 << 22,	/* This is a kern_mount call.  */
   110	#define MS_KERNMOUNT	MS_KERNMOUNT
   111	#undef MS_I_VERSION
   112	  MS_I_VERSION =  1 << 23,	/* Update inode I_version field.  */
   113	#define MS_I_VERSION	MS_I_VERSION
   114	#undef MS_STRICTATIME
   115	  MS_STRICTATIME = 1 << 24,	/* Always perform atime updates.  */
   116	#define MS_STRICTATIME	MS_STRICTATIME
   117	#undef MS_LAZYTIME
   118	  MS_LAZYTIME = 1 << 25,	/* Update the on-disk [acm]times lazily.  */
   119	#define MS_LAZYTIME	MS_LAZYTIME
   120	#undef MS_ACTIVE
   121	  MS_ACTIVE = 1 << 30,
   122	#define MS_ACTIVE	MS_ACTIVE
   123	#undef MS_NOUSER
   124	  MS_NOUSER = 1 << 31
   125	#define MS_NOUSER	MS_NOUSER
   126	};
   127	
   128	/* Flags that can be altered by MS_REMOUNT  */
   129	#undef MS_RMT_MASK
   130	#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION \
   131			     |MS_LAZYTIME)
   132	
   133	
   134	/* Magic mount flag number. Has to be or-ed to the flag values.  */
   135	
   136	#undef MS_MGC_VAL
   137	#define MS_MGC_VAL 0xc0ed0000	/* Magic flag number to indicate "new" flags */
   138	#define MS_MGC_MSK 0xffff0000	/* Magic flag number mask */
   139	
   140	
   141	/* The read-only stuff doesn't really belong here, but any other place
   142	   is probably as bad and I don't want to create yet another include
   143	   file.  */
   144	
   145	#undef BLKROSET
   146	#define BLKROSET   _IO(0x12, 93) /* Set device read-only (0 = read-write).  */
   147	#undef BLKROGET
   148	#define BLKROGET   _IO(0x12, 94) /* Get read-only status (0 = read_write).  */
   149	#undef BLKRRPART
   150	#define BLKRRPART  _IO(0x12, 95) /* Re-read partition table.  */
   151	#undef BLKGETSIZE
   152	#define BLKGETSIZE _IO(0x12, 96) /* Return device size.  */
   153	#undef BLKFLSBUF
   154	#define BLKFLSBUF  _IO(0x12, 97) /* Flush buffer cache.  */
   155	#undef BLKRASET
   156	#define BLKRASET   _IO(0x12, 98) /* Set read ahead for block device.  */
   157	#undef BLKRAGET
   158	#define BLKRAGET   _IO(0x12, 99) /* Get current read ahead setting.  */
   159	#undef BLKFRASET
   160	#define BLKFRASET  _IO(0x12,100) /* Set filesystem read-ahead.  */
   161	#undef BLKFRAGET
   162	#define BLKFRAGET  _IO(0x12,101) /* Get filesystem read-ahead.  */
   163	#undef BLKSECTSET
   164	#define BLKSECTSET _IO(0x12,102) /* Set max sectors per request.  */
   165	#undef BLKSECTGET
   166	#define BLKSECTGET _IO(0x12,103) /* Get max sectors per request.  */
   167	#undef BLKSSZGET
   168	#define BLKSSZGET  _IO(0x12,104) /* Get block device sector size.  */
   169	#undef BLKBSZGET
   170	#define BLKBSZGET  _IOR(0x12,112,size_t)
   171	#undef BLKBSZSET
   172	#define BLKBSZSET  _IOW(0x12,113,size_t)
   173	#undef BLKGETSIZE64
   174	#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size.  */
   175	
   176	
   177	/* Possible value for FLAGS parameter of `umount2'.  */
   178	enum
   179	{
   180	  MNT_FORCE = 1,		/* Force unmounting.  */
   181	#define MNT_FORCE MNT_FORCE
   182	  MNT_DETACH = 2,		/* Just detach from the tree.  */
   183	#define MNT_DETACH MNT_DETACH
   184	  MNT_EXPIRE = 4,		/* Mark for expiry.  */
   185	#define MNT_EXPIRE MNT_EXPIRE
   186	  UMOUNT_NOFOLLOW = 8		/* Don't follow symlink on umount.  */
   187	#define UMOUNT_NOFOLLOW UMOUNT_NOFOLLOW
   188	};
   189	
   190	
   191	/* fsmount flags.  */
   192	#define FSMOUNT_CLOEXEC         0x00000001
   193	
   194	/* mount attributes used on fsmount.  */
   195	#define MOUNT_ATTR_RDONLY       0x00000001 /* Mount read-only.  */
   196	#define MOUNT_ATTR_NOSUID       0x00000002 /* Ignore suid and sgid bits.  */
   197	#define MOUNT_ATTR_NODEV        0x00000004 /* Disallow access to device special files.  */
   198	#define MOUNT_ATTR_NOEXEC       0x00000008 /* Disallow program execution.  */
   199	#define MOUNT_ATTR__ATIME       0x00000070 /* Setting on how atime should be updated.  */
   200	#define MOUNT_ATTR_RELATIME     0x00000000 /* - Update atime relative to mtime/ctime.  */
   201	#define MOUNT_ATTR_NOATIME      0x00000010 /* - Do not update access times.  */
   202	#define MOUNT_ATTR_STRICTATIME  0x00000020 /* - Always perform atime updates  */
   203	#define MOUNT_ATTR_NODIRATIME   0x00000080 /* Do not update directory access times.  */
   204	#define MOUNT_ATTR_IDMAP        0x00100000 /* Idmap mount to @userns_fd in struct mount_attr.  */
   205	#define MOUNT_ATTR_NOSYMFOLLOW  0x00200000 /* Do not follow symlinks.  */
   206	
   207	
   208	#ifndef MOUNT_ATTR_SIZE_VER0
   209	/* For mount_setattr.  */
   210	struct mount_attr
   211	{
   212	  uint64_t attr_set;
   213	  uint64_t attr_clr;
   214	  uint64_t propagation;
   215	  uint64_t userns_fd;
   216	};
   217	#endif
   218	
   219	#define MOUNT_ATTR_SIZE_VER0    32 /* sizeof first published struct */
   220	
   221	/* move_mount flags.  */
   222	#define MOVE_MOUNT_F_SYMLINKS   0x00000001 /* Follow symlinks on from path */
   223	#define MOVE_MOUNT_F_AUTOMOUNTS 0x00000002 /* Follow automounts on from path */
   224	#define MOVE_MOUNT_F_EMPTY_PATH 0x00000004 /* Empty from path permitted */
   225	#define MOVE_MOUNT_T_SYMLINKS   0x00000010 /* Follow symlinks on to path */
   226	#define MOVE_MOUNT_T_AUTOMOUNTS 0x00000020 /* Follow automounts on to path */
   227	#define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */
   228	#define MOVE_MOUNT_SET_GROUP    0x00000100 /* Set sharing group instead */
   229	#define MOVE_MOUNT_BENEATH      0x00000200 /* Mount beneath top mount */
   230	
   231	
   232	/* fspick flags.  */
   233	#define FSPICK_CLOEXEC          0x00000001
   234	#define FSPICK_SYMLINK_NOFOLLOW 0x00000002
   235	#define FSPICK_NO_AUTOMOUNT     0x00000004
   236	#define FSPICK_EMPTY_PATH       0x00000008
   237	
   238	
   239	#ifndef FSOPEN_CLOEXEC
   240	/* The type of fsconfig call made.   */
   241	enum fsconfig_command
   242	{
   243	  FSCONFIG_SET_FLAG       = 0,    /* Set parameter, supplying no value */
   244	# define FSCONFIG_SET_FLAG FSCONFIG_SET_FLAG
   245	  FSCONFIG_SET_STRING     = 1,    /* Set parameter, supplying a string value */
   246	# define FSCONFIG_SET_STRING FSCONFIG_SET_STRING
   247	  FSCONFIG_SET_BINARY     = 2,    /* Set parameter, supplying a binary blob value */
   248	# define FSCONFIG_SET_BINARY FSCONFIG_SET_BINARY
   249	  FSCONFIG_SET_PATH       = 3,    /* Set parameter, supplying an object by path */
   250	# define FSCONFIG_SET_PATH FSCONFIG_SET_PATH
   251	  FSCONFIG_SET_PATH_EMPTY = 4,    /* Set parameter, supplying an object by (empty) path */
   252	# define FSCONFIG_SET_PATH_EMPTY FSCONFIG_SET_PATH_EMPTY
   253	  FSCONFIG_SET_FD         = 5,    /* Set parameter, supplying an object by fd */
   254	# define FSCONFIG_SET_FD FSCONFIG_SET_FD
   255	  FSCONFIG_CMD_CREATE     = 6,    /* Invoke superblock creation */
   256	# define FSCONFIG_CMD_CREATE FSCONFIG_CMD_CREATE
   257	  FSCONFIG_CMD_RECONFIGURE = 7,   /* Invoke superblock reconfiguration */
   258	# define FSCONFIG_CMD_RECONFIGURE FSCONFIG_CMD_RECONFIGURE
   259	  FSCONFIG_CMD_CREATE_EXCL = 8,    /* Create new superblock, fail if reusing existing superblock */
   260	# define FSCONFIG_CMD_CREATE_EXCL FSCONFIG_CMD_CREATE_EXCL
   261	};
   262	#endif
   263	
   264	/* fsopen flags.  */
   265	#define FSOPEN_CLOEXEC          0x00000001
   266	
   267	/* open_tree flags.  */
   268	#define OPEN_TREE_CLONE    1         /* Clone the target tree and attach the clone */
   269	#define OPEN_TREE_CLOEXEC  O_CLOEXEC /* Close the file on execve() */
   270	
   271	
   272	__BEGIN_DECLS
   273	
   274	/* Mount a filesystem.  */
   275	extern int mount (const char *__special_file, const char *__dir,
   276			  const char *__fstype, unsigned long int __rwflag,
   277			  const void *__data) __THROW;
   278	
   279	/* Unmount a filesystem.  */
   280	extern int umount (const char *__special_file) __THROW;
   281	
   282	/* Unmount a filesystem.  Force unmounting if FLAGS is set to MNT_FORCE.  */
   283	extern int umount2 (const char *__special_file, int __flags) __THROW;
   284	
   285	/* Open the filesystem referenced by FS_NAME so it can be configured for
   286	   mouting.  */
   287	extern int fsopen (const char *__fs_name, unsigned int __flags) __THROW;
   288	
   289	/* Create a mount representation for the FD created by fsopen using
   290	   FLAGS with ATTR_FLAGS describing how the mount is to be performed.  */
   291	extern int fsmount (int __fd, unsigned int __flags,
   292			    unsigned int __ms_flags) __THROW;
   293	
   294	/* Add the mounted FROM_DFD referenced by FROM_PATHNAME filesystem returned
   295	   by fsmount in the hierarchy in the place TO_DFD reference by TO_PATHNAME
   296	   using FLAGS.  */
   297	extern int move_mount (int __from_dfd, const char *__from_pathname,
   298			       int __to_dfd, const char *__to_pathname,
   299			       unsigned int flags) __THROW;
   300	
   301	/* Set parameters and trigger CMD action on the FD context.  KEY, VALUE,
   302	   and AUX are used depending ng of the CMD.  */
   303	extern int fsconfig (int __fd, unsigned int __cmd, const char *__key,
   304			     const void *__value, int __aux) __THROW;
   305	
   306	/* Equivalent of fopen for an existing mount point.  */
   307	extern int fspick (int __dfd, const char *__path, unsigned int __flags)
   308	  __THROW;
   309	
   310	/* Open the mount point FILENAME in directory DFD using FLAGS.  */
   311	extern int open_tree (int __dfd, const char *__filename, unsigned int __flags)
   312	  __THROW;
   313	
   314	/* Change the mount properties of the mount or an entire mount tree.  If
   315	   PATH is a relative pathname, then it is interpreted relative to the
   316	   directory referred to by the file descriptor dirfd.  Otherwise if DFD is
   317	   the special value AT_FDCWD then PATH is interpreted relative to the current
   318	   working directory of the calling process.  */
   319	extern int mount_setattr (int __dfd, const char *__path, unsigned int __flags,
   320				  struct mount_attr *__uattr, size_t __usize)
   321	  __THROW;
   322	
   323	__END_DECLS
   324	
   325	#endif /* _SYS_MOUNT_H */