Messages in this thread | | | Subject | Re: Question: Why is there no notification when a file is opened using filp_open()? | From | Xiaoming Ni <> | Date | Tue, 8 Sep 2020 20:53:07 +0800 |
| |
On 2020/9/8 18:06, Amir Goldstein wrote: > On Tue, Sep 8, 2020 at 11:02 AM Xiaoming Ni <nixiaoming@huawei.com> wrote: >> >> The file opening action on the system may be from user-mode sys_open() >> or kernel-mode filp_open(). >> Currently, fsnotify_open() is invoked in do_sys_openat2(). >> But filp_open() is not notified. Why? Is this an omission? >> >> Do we need to call fsnotify_open() in filp_open() or do_filp_open() to >> ensure that both user-mode and kernel-mode file opening operations can >> be notified? >> > > Do you have a specific use case of kernel filp_open() in mind? >
For example, in fs/coredump.c, do_coredump() calls filp_open() to generate core files. In this scenario, the fsnotify_open() notification is missing.
Thanks Xiaoming Ni
| |