Commit 993b8926 authored by Fox Chen's avatar Fox Chen Committed by Jonathan Corbet
Browse files

docs: path-lookup: update follow_managed() part 



No follow_managed() anymore, handle_mounts(),
traverse_mounts(), will do the job.
see commit 9deed3eb ("new helper: traverse_mounts()")

Signed-off-by: default avatarFox Chen <foxhlchen@gmail.com>
Reviewed-by: default avatarNeilBrown <neilb@suse.de>
Link: https://lore.kernel.org/r/20210527091618.287093-2-foxhlchen@gmail.com


Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent 222a28ed

Documentation/filesystems/path-lookup.rst

+5 −5
Original line number Diff line number Diff line
@@ -448,10 +448,11 @@ described. If it finds a ``LAST_NORM`` component it first calls 
filesystem to revalidate the result if it is that sort of filesystem.

If that doesn't get a good result, it calls "``lookup_slow()``" which

takes ``i_rwsem``, rechecks the cache, and then asks the filesystem

to find a definitive answer.  Each of these will call

``follow_managed()`` (as described below) to handle any mount points.

to find a definitive answer.



In the absence of symbolic links, ``walk_component()`` creates a new

As the last step of ``walk_component()``, ``step_into()`` will be called either

directly from walk_component() or from handle_dots().  It calls

``handle_mounts()``, to check and handle mount points, in which a new

``struct path`` containing a counted reference to the new dentry and a

reference to the new ``vfsmount`` which is only counted if it is

different from the previous ``vfsmount``.  It then calls
@@ -535,8 +536,7 @@ covered in greater detail in autofs.txt in the Linux documentation 
tree, but a few notes specifically related to path lookup are in order

here.



The Linux VFS has a concept of "managed" dentries which is reflected

in function names such as "``follow_managed()``".  There are three

The Linux VFS has a concept of "managed" dentries.  There are three

potentially interesting things about these dentries corresponding

to three different flags that might be set in ``dentry->d_flags``: