linux-ext4 - Re: [PATCH v5 16/23] fanotify: Reserve UAPI bits for FAN_FS

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Message-ID: <20210805103358.GI14483@quack2.suse.cz>
Date:   Thu, 5 Aug 2021 12:33:58 +0200
From:   Jan Kara <jack@...e.cz>
To:     Gabriel Krisman Bertazi <krisman@...labora.com>
Cc:     jack@...e.com, amir73il@...il.com, djwong@...nel.org,
        tytso@....edu, david@...morbit.com, dhowells@...hat.com,
        khazhy@...gle.com, linux-fsdevel@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-api@...r.kernel.org,
        kernel@...labora.com
Subject: Re: [PATCH v5 16/23] fanotify: Reserve UAPI bits for FAN_FS_ERROR

On Wed 04-08-21 12:06:05, Gabriel Krisman Bertazi wrote:
> FAN_FS_ERROR allows reporting of event type FS_ERROR to userspace, which
> a mechanism to report file system wide problems via fanotify.  This
> commit preallocate userspace visible bits to match the FS_ERROR event.
> 
> Signed-off-by: Gabriel Krisman Bertazi <krisman@...labora.com>

Looks good. Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/notify/fanotify/fanotify.c | 1 +
>  include/uapi/linux/fanotify.h | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
> index 456c60107d88..ca74199f11e2 100644
> --- a/fs/notify/fanotify/fanotify.c
> +++ b/fs/notify/fanotify/fanotify.c
> @@ -733,6 +733,7 @@ static int fanotify_handle_event(struct fsnotify_group *group, u32 mask,
>  	BUILD_BUG_ON(FAN_ONDIR != FS_ISDIR);
>  	BUILD_BUG_ON(FAN_OPEN_EXEC != FS_OPEN_EXEC);
>  	BUILD_BUG_ON(FAN_OPEN_EXEC_PERM != FS_OPEN_EXEC_PERM);
> +	BUILD_BUG_ON(FAN_FS_ERROR != FS_ERROR);
>  
>  	BUILD_BUG_ON(HWEIGHT32(ALL_FANOTIFY_EVENT_BITS) != 19);
>  
> diff --git a/include/uapi/linux/fanotify.h b/include/uapi/linux/fanotify.h
> index fbf9c5c7dd59..16402037fc7a 100644
> --- a/include/uapi/linux/fanotify.h
> +++ b/include/uapi/linux/fanotify.h
> @@ -20,6 +20,7 @@
>  #define FAN_OPEN_EXEC		0x00001000	/* File was opened for exec */
>  
>  #define FAN_Q_OVERFLOW		0x00004000	/* Event queued overflowed */
> +#define FAN_FS_ERROR		0x00008000	/* Filesystem error */
>  
>  #define FAN_OPEN_PERM		0x00010000	/* File open in perm check */
>  #define FAN_ACCESS_PERM		0x00020000	/* File accessed in perm check */
> -- 
> 2.32.0
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR