include/mount-api-utils.h

   1 #ifndef UTIL_LINUX_MOUNT_API_UTILS
   2 #define UTIL_LINUX_MOUNT_API_UTILS
   3
   4 #ifdef HAVE_MOUNTFD_API
   5
   6 #include <sys/syscall.h>
   7 #include <linux/mount.h>
   8
   9 /* Accepted by both open_tree() and mount_setattr(). */
  10 #ifndef AT_RECURSIVE
  11 # define AT_RECURSIVE 0x8000
  12 #endif
  13
  14 #ifndef OPEN_TREE_CLONE
  15 # define OPEN_TREE_CLONE 1
  16 #endif
  17
  18 #ifndef OPEN_TREE_CLOEXEC
  19 # define OPEN_TREE_CLOEXEC O_CLOEXEC
  20 #endif
  21
  22 #if !defined(HAVE_OPEN_TREE) && defined(SYS_open_tree)
  23 static inline int open_tree(int dfd, const char *filename, unsigned int flags)
  24 {
  25         return syscall(SYS_open_tree, dfd, filename, flags);
  26 }
  27 #endif
  28
  29 #ifndef MOVE_MOUNT_F_SYMLINKS
  30 # define MOVE_MOUNT_F_SYMLINKS 0x00000001 /* Follow symlinks on from path */
  31 #endif
  32
  33 #ifndef MOVE_MOUNT_F_AUTOMOUNTS
  34 # define MOVE_MOUNT_F_AUTOMOUNTS 0x00000002 /* Follow automounts on from path */
  35 #endif
  36
  37 #ifndef MOVE_MOUNT_F_EMPTY_PATH
  38 # define MOVE_MOUNT_F_EMPTY_PATH 0x00000004 /* Empty from path permitted */
  39 #endif
  40
  41 #ifndef MOVE_MOUNT_T_SYMLINKS
  42 # define MOVE_MOUNT_T_SYMLINKS 0x00000010 /* Follow symlinks on to path */
  43 #endif
  44
  45 #ifndef MOVE_MOUNT_T_AUTOMOUNTS
  46 # define MOVE_MOUNT_T_AUTOMOUNTS 0x00000020 /* Follow automounts on to path */
  47 #endif
  48
  49 #ifndef MOVE_MOUNT_T_EMPTY_PATH
  50 # define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */
  51 #endif
  52
  53 #ifndef MOVE_MOUNT__MASK
  54 # define MOVE_MOUNT__MASK 0x00000077
  55 #endif
  56
  57 #if !defined(HAVE_MOVE_MOUNT) && defined(SYS_move_mount)
  58 static inline int move_mount(int from_dfd, const char *from_pathname, int to_dfd,
  59                              const char *to_pathname, unsigned int flags)
  60 {
  61         return syscall(SYS_move_mount, from_dfd, from_pathname, to_dfd,
  62                        to_pathname, flags);
  63 }
  64 #endif
  65
  66 #ifndef MOUNT_ATTR_RDONLY
  67 # define MOUNT_ATTR_RDONLY 0x00000001
  68 #endif
  69
  70 #ifndef MOUNT_ATTR_NOSUID
  71 # define MOUNT_ATTR_NOSUID 0x00000002
  72 #endif
  73
  74 #ifndef MOUNT_ATTR_NOEXEC
  75 # define MOUNT_ATTR_NOEXEC 0x00000008
  76 #endif
  77
  78 #ifndef MOUNT_ATTR__ATIME
  79 # define MOUNT_ATTR__ATIME 0x00000070
  80 #endif
  81
  82 #ifndef MOUNT_ATTR_RELATIME
  83 # define MOUNT_ATTR_RELATIME 0x00000000
  84 #endif
  85
  86 #ifndef MOUNT_ATTR_NOATIME
  87 # define MOUNT_ATTR_NOATIME 0x00000010
  88 #endif
  89
  90 #ifndef MOUNT_ATTR_STRICTATIME
  91 # define MOUNT_ATTR_STRICTATIME 0x00000020
  92 #endif
  93
  94 #ifndef MOUNT_ATTR_NODIRATIME
  95 # define MOUNT_ATTR_NODIRATIME 0x00000080
  96 #endif
  97
  98 #ifndef MOUNT_ATTR_IDMAP
  99 # define MOUNT_ATTR_IDMAP 0x00100000
 100 #endif
 101
 102 #ifndef MOUNT_ATTR_NOSYMFOLLOW
 103 # define MOUNT_ATTR_NOSYMFOLLOW 0x00200000
 104 #endif
 105
 106 #ifndef HAVE_STRUCT_MOUNT_ATTR
 107 # include <inttypes.h>
 108 struct mount_attr {
 109         uint64_t attr_set;
 110         uint64_t attr_clr;
 111         uint64_t propagation;
 112         uint64_t userns_fd;
 113 };
 114 #endif
 115
 116 #if !defined(HAVE_MOUNT_SETATTR) && defined(SYS_mount_setattr)
 117 static inline int mount_setattr(int dfd, const char *path, unsigned int flags,
 118                                 struct mount_attr *attr, size_t size)
 119 {
 120         return syscall(SYS_mount_setattr, dfd, path, flags, attr, size);
 121 }
 122 #endif
 123
 124 #ifndef HAVE_ENUM_FSCONFIG_COMMAND
 125 enum fsconfig_command {
 126         FSCONFIG_SET_FLAG       = 0,    /* Set parameter, supplying no value */
 127         FSCONFIG_SET_STRING     = 1,    /* Set parameter, supplying a string value */
 128         FSCONFIG_SET_BINARY     = 2,    /* Set parameter, supplying a binary blob value */
 129         FSCONFIG_SET_PATH       = 3,    /* Set parameter, supplying an object by path */
 130         FSCONFIG_SET_PATH_EMPTY = 4,    /* Set parameter, supplying an object by (empty) path */
 131         FSCONFIG_SET_FD         = 5,    /* Set parameter, supplying an object by fd */
 132         FSCONFIG_CMD_CREATE     = 6,    /* Invoke superblock creation */
 133         FSCONFIG_CMD_RECONFIGURE = 7,   /* Invoke superblock reconfiguration */
 134 };
 135 #endif
 136
 137 #if !defined(HAVE_FSCONFIG) && defined(SYS_fsconfig)
 138 static inline int fsconfig(int fd, unsigned int cmd, const char *key,
 139                     const void *value, int aux)
 140 {
 141         return syscall(SYS_fsconfig, fd, cmd, key, value, aux);
 142 }
 143 #endif
 144
 145 #ifndef FSOPEN_CLOEXEC
 146 # define FSOPEN_CLOEXEC          0x00000001
 147 #endif
 148
 149 #if !defined(HAVE_FSOPEN) && defined(SYS_fsopen)
 150 static inline int fsopen(const char *fsname, unsigned int flags)
 151 {
 152         return syscall(SYS_fsopen, fsname, flags);
 153 }
 154 #endif
 155
 156 #ifndef FSMOUNT_CLOEXEC
 157 # define FSMOUNT_CLOEXEC         0x00000001
 158 #endif
 159
 160 #if !defined(HAVE_FSMOUNT) && defined(SYS_fsmount)
 161 static inline int fsmount(int fd, unsigned int flags, unsigned int mount_attrs)
 162 {
 163         return syscall(SYS_fsmount, fd, flags, mount_attrs);
 164 }
 165 #endif
 166
 167 #ifndef FSPICK_CLOEXEC
 168 # define FSPICK_CLOEXEC          0x00000001
 169 #endif
 170
 171 #ifndef FSPICK_SYMLINK_NOFOLLOW
 172 # define FSPICK_SYMLINK_NOFOLLOW 0x00000002
 173 #endif
 174
 175 #ifndef FSPICK_NO_AUTOMOUNT
 176 # define FSPICK_NO_AUTOMOUNT     0x00000004
 177 #endif
 178
 179 #ifdef FSPICK_EMPTY_PATH
 180 # define FSPICK_EMPTY_PATH       0x00000008
 181 #endif
 182
 183 #if !defined(HAVE_FSPICK) && defined(SYS_fspick)
 184 static inline int fspick(int dfd, const char *pathname, unsigned int flags)
 185 {
 186         return syscall(SYS_fspick, dfd, pathname, flags);
 187 }
 188 #endif
 189
 190 #endif /* HAVE_MOUNTFD_API */
 191 #endif /* UTIL_LINUX_MOUNT_API_UTILS */
 192