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docs: filesystems: convert automount-support.txt to ReST
- Add a SPDX header;
- Add a document title;
- Adjust section titles;
- Mark literal blocks as such;
- Add it to filesystems/index.rst.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/ba7e2f2bf9aa2c7096772f5e7e8e609cb5fce07c.1588021877.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
authored by
Mauro Carvalho Chehab
and committed by
Jonathan Corbet
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Documentation/filesystems/automount-support.txt
Documentation/filesystems/automount-support.rst
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Documentation/filesystems/automount-support.txt
Documentation/filesystems/automount-support.rst
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.. SPDX-License-Identifier: GPL-2.0
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=================
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Automount Support
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=================
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Support is available for filesystems that wish to do automounting
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support (such as kAFS which can be found in fs/afs/ and NFS in
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fs/nfs/). This facility includes allowing in-kernel mounts to be
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also be requested by userspace.
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======================
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IN-KERNEL AUTOMOUNTING
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In-Kernel Automounting
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======================
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See section "Mount Traps" of Documentation/filesystems/autofs.rst
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Then from userspace, you can just do something like:
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Then from userspace, you can just do something like::
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[root@andromeda root]# mount -t afs \#root.afs. /afs
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[root@andromeda root]# ls /afs
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[root@andromeda root]# ls /afs/cambridge/afsdoc/
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ChangeLog html LICENSE pdf RELNOTES-1.2.2
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And then if you look in the mountpoint catalogue, you'll see something like:
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And then if you look in the mountpoint catalogue, you'll see something like::
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[root@andromeda root]# cat /proc/mounts
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...
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#afsdoc. /afs/cambridge.redhat.com/afsdoc afs rw 0 0
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===========================
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AUTOMATIC MOUNTPOINT EXPIRY
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Automatic Mountpoint Expiry
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===========================
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Automatic expiration of mountpoints is easy, provided you've mounted the
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hung.
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(2) When a new mountpoint is created in the ->d_automount method, add
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the mnt to the list using mnt_set_expiry()
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the mnt to the list using mnt_set_expiry()::
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mnt_set_expiry(newmnt, &afs_vfsmounts);
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(3) When you want mountpoints to be expired, call mark_mounts_for_expiry()
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same expiration list.
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=======================
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USERSPACE DRIVEN EXPIRY
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Userspace Driven Expiry
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=======================
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As an alternative, it is possible for userspace to request expiry of any