debugfs_remove_recursive() while a file is in use by userspace

From	Rajat Jain <rajatxjain@gmail.com>
Newsgroups	linux.kernel
Subject	debugfs_remove_recursive() while a file is in use by userspace
Date	2015-12-28 21:30 +0100
Message-ID	<qKMAy-78z-7@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi,

I wanted to understand the behavior taken when a module calls
debugfs_remove_recursive() on a directory, while files under that
directory may still be in use by the userspace (for instance an
ongoing read / write operation).

Does the function wait

(1) until all the currently executing file operation methods
(read/write/map etc) have returned?
OR
(2) until the user has given up all references (descriptors) to the
files under the directory (i.e. until release() method has been
called)?

Thanks,

Rajat
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debugfs_remove_recursive() while a file is in use by userspace Rajat Jain <rajatxjain@gmail.com> - 2015-12-28 21:30 +0100
  Re: debugfs_remove_recursive() while a file is in use by userspace Al Viro <viro@ZenIV.linux.org.uk> - 2015-12-28 21:40 +0100
  Re: debugfs_remove_recursive() while a file is in use by userspace Greg Kroah-Hartman <greg@kroah.com> - 2015-12-28 21:40 +0100
    Re: debugfs_remove_recursive() while a file is in use by userspace Greg Kroah-Hartman <greg@kroah.com> - 2015-12-28 22:00 +0100
      Re: debugfs_remove_recursive() while a file is in use by userspace Greg Kroah-Hartman <greg@kroah.com> - 2015-12-28 22:20 +0100
      Re: debugfs_remove_recursive() while a file is in use by userspace Rajat Jain <rajatxjain@gmail.com> - 2015-12-28 22:20 +0100
    Re: debugfs_remove_recursive() while a file is in use by userspace Rajat Jain <rajatxjain@gmail.com> - 2015-12-28 22:00 +0100
  Re: debugfs_remove_recursive() while a file is in use by userspace Nicolai Stange <nicstange@gmail.com> - 2015-12-28 21:50 +0100
    Re: debugfs_remove_recursive() while a file is in use by userspace Rajat Jain <rajatxjain@gmail.com> - 2015-12-28 22:00 +0100

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