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autofs: update mount control expire desription with AUTOFS_EXP_FORCED 

Describe AUTOFS_EXP_FORCED in addition to AUTOFS_EXP_IMMEDIATE in the
description of the AUTOFS_DEV_IOCTL_EXPIRE_CMD ioctl.

Link: http://lkml.kernel.org/r/155287084078.12593.15000931045413195778.stgit@pluto.themaw.net
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ian Kent 2019-05-14 15:44:23 -07:00 committed by Linus Torvalds
parent f23ceaac6a
commit 841964e86a
2 changed files with 9 additions and 2 deletions
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6
Documentation/filesystems/autofs-mount-control.txt
View File

@ -354,8 +354,10 @@ this ioctl is called until no further expire candidates are found.
The call requires an initialized struct autofs_dev_ioctl with the
ioctlfd field set to the descriptor obtained from the open call. In
addition an immediate expire, independent of the mount timeout, can be
requested by setting the how field of struct args_expire to 1. If no
addition an immediate expire that's independent of the mount timeout,
and a forced expire that's independent of whether the mount is busy,
can be requested by setting the how field of struct args_expire to
AUTOFS_EXP_IMMEDIATE or AUTOFS_EXP_FORCED, respectively . If no
expire candidates can be found the ioctl returns -1 with errno set to
EAGAIN.

5
Documentation/filesystems/autofs.txt
View File

@ -410,6 +410,11 @@ The available ioctl commands are:
**AUTOFS_EXP_IMMEDIATE** causes `last_used` time to be ignored
and objects are expired if the are not in use.
**AUTOFS_EXP_FORCED** causes the in use status to be ignored
and objects are expired ieven if they are in use. This assumes
that the daemon has requested this because it is capable of
performing the umount.
**AUTOFS_EXP_LEAVES** will select a leaf rather than a top-level
name to expire. This is only safe when *maxproto* is 4.