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autofs: add description of ignore pseudo mount option 

Add a description of the "ignore" pseudo mount option that can be used
to provide a generic indicator to applications that the mount entry
should be ignored when displaying mount information.

Link: http://lkml.kernel.org/r/155287084617.12593.812733161112154904.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 15:44:26 -07:00 committed by Linus Torvalds
parent 841964e86a
commit 1dcaa138fc
1 changed files with 15 additions and 0 deletions
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15
Documentation/filesystems/autofs.txt
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@ -526,6 +526,21 @@ directories.
Catatonic mode can only be left via the
**AUTOFS_DEV_IOCTL_OPENMOUNT_CMD** ioctl on the `/dev/autofs`.
The "ignore" mount option
-------------------------
The "ignore" mount option can be used to provide a generic indicator
to applications that the mount entry should be ignored when displaying
mount information.
In other OSes that provide autofs and that provide a mount list to user
space based on the kernel mount list a no-op mount option ("ignore" is
the one use on the most common OSes) is allowed so that autofs file
system users can optionally use it.
This is intended to be used by user space programs to exclude autofs
mounts from consideration when reading the mounts list.
autofs, name spaces, and shared mounts
--------------------------------------