linux-ext4 - Re: [PATCH 1/5] e4defrag: return more specific error message on ioctl failure

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Date:	Mon, 20 Jul 2009 02:00:57 +0800
From:	Peng Tao <bergwolf@...il.com>
To:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 1/5] e4defrag: return more specific error message on ioctl 
	failure

oops, please ignore the [patch 1/5] series number. It was miss typed.

On Mon, Jul 20, 2009 at 1:47 AM, Peng Tao<bergwolf@...il.com> wrote:
> Currently e4defrag relies on the EXT4_IOC_MOVE_EXT ioctl to perform online
> defragmentation. However, this iotcl kernel patch is not available before
> 2.6.30-rc1. e4defrag shall fail without obvious reasons on systems running
> older kernels. The patch adds more detailed error message addressing this
> issue and prompts users with the minimal kernel version that is needed to
> run e4defrag.
>
> Signed-off-by: Peng Tao <bergwolf@...il.com>
> ---
>  misc/e4defrag.c |    6 +++++-
>  1 files changed, 5 insertions(+), 1 deletions(-)
>
> diff --git a/misc/e4defrag.c b/misc/e4defrag.c
> index c25514a..f1c3008 100644
> --- a/misc/e4defrag.c
> +++ b/misc/e4defrag.c
> @@ -1553,7 +1553,11 @@ static int call_defrag(int fd, int donor_fd, const char *file,
>                        if (mode_flag & DETAIL) {
>                                printf("\n");
>                                PRINT_ERR_MSG_WITH_ERRNO(
> -                                               "Failed to defrag");
> +                                       "Failed to defrag with "
> +                                       "EXT4_IOC_MOVE_EXT ioctl");
> +                               if (errno == ENOTTY)
> +                                       printf("\tAt least 2.6.31-rc1 of"
> +                                               " vallina kernel is required\n");
>                        } else {
>                                printf("\t[ NG ]\n");
>                        }
> --
> 1.6.2.GIT
>
>



-- 
Cheers,
Peng Tao
State Key Laboratory of Networking and Switching Technology
Beijing Univ. of Posts and Telecoms.