Re: [PATCH v7 20/28] fanotify: Support enqueueing of error events

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On Fri, Oct 15, 2021 at 12:39 AM Gabriel Krisman Bertazi
<krisman@xxxxxxxxxxxxx> wrote:
>
> Once an error event is triggered, collect the data from the fs error
> report and enqueue it in the notification group, similarly to what is
> done for other events.  FAN_FS_ERROR is no longer handled specially,
> since the memory is now handled by a preallocated mempool.
>
> For now, make the event unhashed.  A future patch implements merging for
> these kinds of events.
>
> Signed-off-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
> ---
>  fs/notify/fanotify/fanotify.c | 35 +++++++++++++++++++++++++++++++++++
>  fs/notify/fanotify/fanotify.h |  6 ++++++
>  2 files changed, 41 insertions(+)
>
> diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
> index 01d68dfc74aa..9b970359570a 100644
> --- a/fs/notify/fanotify/fanotify.c
> +++ b/fs/notify/fanotify/fanotify.c
> @@ -574,6 +574,27 @@ static struct fanotify_event *fanotify_alloc_name_event(struct inode *id,
>         return &fne->fae;
>  }
>
> +static struct fanotify_event *fanotify_alloc_error_event(
> +                                               struct fsnotify_group *group,
> +                                               __kernel_fsid_t *fsid,
> +                                               const void *data, int data_type)
> +{
> +       struct fs_error_report *report =
> +                       fsnotify_data_error_report(data, data_type);
> +       struct fanotify_error_event *fee;
> +
> +       if (WARN_ON(!report))

WARN_ON_ONCE please.

Commit message claims to collect the data from the report,
but this commit does nothing with the report??

Thanks,
Amir.



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