Documentation/filesystems/autofs-mount-control.rst

202 The ioctlfd field is a mount point file descriptor of an autofs mount
212 The path field is used to pass a path where it is needed and the size field
224 mismatch results in a -EINVAL return. If the size field is greater than
261 with the ioctlfd field set to a valid autofs mount point descriptor
262 and sets the requested version number in version field of struct args_protover
263 or sub_version field of struct args_protosubver. These commands return
272 the path field set and the size field adjusted appropriately as well
273 as the devid field of struct args_openmount set to the device number of
276 autofs_dev_ioct with the ioctlfd field set to the descriptor obtained
288 with the ioctlfd field set to the descriptor obtained from the open
289 call and the token field of struct args_ready or struct args_fail set
291 mount or expire request. The status field of struct args_fail is set to
306 ioctlfd field set to the descriptor obtained from the open call and
307 the pipefd field of struct args_setpipefd set to descriptor of the pipe.
321 ioctlfd field set to the descriptor obtained from the open call.
330 ioctlfd field set to the descriptor obtained from the open call.
340 field set to the mount point in question and the size field adjusted
341 appropriately. Upon return the uid field of struct args_requester contains
342 the uid and gid field the gid.
358 ioctlfd field set to the descriptor obtained from the open call. In
361 can be requested by setting the how field of struct args_expire to
376 ioctlfd field set to the descriptor obtained from the open call and
377 it returns the result in the may_umount field of struct args_askumount,
387 possible variations. Both use the path field set to the path of the mount
388 point to check and the size field adjusted appropriately. One uses the
389 ioctlfd field to identify a specific mount point to check while the other
390 variation uses the path and optionally in.type field of struct args_ismountpoint
392 and sets out.devid field to the device number of the mount and out.magic
393 field to the relevant super block magic number (described below) or 0 if
395 by new_encode_dev()) is returned in out.devid field.
405 If a path is supplied (and the ioctlfd field is set to -1) then the path