linux-ext4 - Re: [PATCH] jbd2: make journal y2038 safe

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Message-ID: <20160619155347.GB2734@quack2.suse.cz>
Date:	Sun, 19 Jun 2016 17:53:47 +0200
From:	Jan Kara <jack@...e.cz>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Theodore Ts'o <tytso@....edu>, Jan Kara <jack@...e.com>,
	y2038@...ts.linaro.org, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] jbd2: make journal y2038 safe

On Fri 17-06-16 17:39:00, Arnd Bergmann wrote:
> The jbd2 journal stores the commit time in 64-bit seconds and 32-bit
> nanoseconds, which avoids an overflow in 2038, but it gets the numbers
> from current_kernel_time(), which uses 'long' seconds on 32-bit
> architectures.
> 
> This simply changes the code to call current_kernel_time64() so
> we use 64-bit seconds consistently.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

The patch looks good. You can add:

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

								Honza

> ---
>  fs/jbd2/commit.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
> index 8f7d1339c973..5bb565f9989c 100644
> --- a/fs/jbd2/commit.c
> +++ b/fs/jbd2/commit.c
> @@ -124,7 +124,7 @@ static int journal_submit_commit_record(journal_t *journal,
>  	struct commit_header *tmp;
>  	struct buffer_head *bh;
>  	int ret;
> -	struct timespec now = current_kernel_time();
> +	struct timespec64 now = current_kernel_time64();
>  
>  	*cbh = NULL;
>  
> -- 
> 2.9.0
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR
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