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| author | Fox Chen <foxhlchen@gmail.com> | 2021-05-27 11:16:07 +0200 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2021-06-18 19:36:07 +0200 |
| commit | 084c86837a3583c7cf56d74f91fb8e6191f99a8a (patch) | |
| tree | d452ae751e683eb3f78fa88b9ad261a4a4248c82 /Documentation/filesystems/path-lookup.rst | |
| parent | docs: path-lookup: update follow_managed() part (diff) | |
| download | linux-084c86837a3583c7cf56d74f91fb8e6191f99a8a.tar.xz linux-084c86837a3583c7cf56d74f91fb8e6191f99a8a.zip | |
docs: path-lookup: update path_to_nameidata() part
No path_to_namei() anymore, step_into() will be called.
Related commit: commit c99687a03a78 ("fold path_to_nameidata()
into its only remaining caller")
Signed-off-by: Fox Chen <foxhlchen@gmail.com>
Reviewed-by: NeilBrown <neilb@suse.de>
Link: https://lore.kernel.org/r/20210527091618.287093-3-foxhlchen@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/filesystems/path-lookup.rst')
| -rw-r--r-- | Documentation/filesystems/path-lookup.rst | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/Documentation/filesystems/path-lookup.rst b/Documentation/filesystems/path-lookup.rst index 751082d469e8..6ea0880fb982 100644 --- a/Documentation/filesystems/path-lookup.rst +++ b/Documentation/filesystems/path-lookup.rst @@ -453,11 +453,12 @@ to find a definitive answer. 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 -``path_to_nameidata()`` to install the new ``struct path`` in the -``struct nameidata`` and drop the unneeded references. +``struct path`` is created 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``. Then if there is +a symbolic link, ``step_into()`` calls ``pick_link()`` to deal with it, +otherwise it installs the new ``struct path`` in the ``struct nameidata``, and +drops the unneeded references. This "hand-over-hand" sequencing of getting a reference to the new dentry before dropping the reference to the previous dentry may |