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autofs: update AUTOFS_EXP_LEAVES description

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Update the description of AUTOFS_EXP_LEAVES to cover its possible future
use with amd format mount maps.

Link: http://lkml.kernel.org/r/155287083538.12593.18163159677020718048.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 15:44:20 -07:00 committed by Linus Torvalds
parent 9200026623
commit f23ceaac6a
1 changed files with 6 additions and 2 deletions
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8
Documentation/filesystems/autofs.txt
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@ -262,8 +262,12 @@ up.
There is an option with indirect mounts to consider each of the leaves
that has been mounted on instead of considering the top-level names.
This is intended for compatibility with version 4 of autofs and should
be considered as deprecated.
This was originally intended for compatibility with version 4 of autofs
and should be considered as deprecated for Sun Format automount maps.
However, it may be used again for amd format mount maps (which are
generally indirect maps) because the amd automounter allows for the
setting of an expire timeout for individual mounts. But there are
some difficulties in making the needed changes for this.
When autofs considers a directory it checks the `last_used` time and
compares it with the "timeout" value set when the filesystem was