[Libguestfs] [PATCH] NEW API: add new api btrfs-fsck

[Richard W.M. Jones]

On Tue, May 15, 2012 at 10:33:42AM +0800, Wanlong Gao wrote:
> Add the new API btrfs-fsck to check the btrfs filesystem.
> Btrfs is currently under heavy development, and not suitable for
> any uses other than benchmarking and review. But it'll be useful
> in the near future.
> 
> Signed-off-by: Wanlong Gao <gaowanlong at cn.fujitsu.com>
> ---
>  daemon/btrfs.c                 |   17 +++++++++++++++++
>  generator/generator_actions.ml |   11 +++++++++++
>  src/MAX_PROC_NR                |    2 +-
>  3 files changed, 29 insertions(+), 1 deletion(-)
> 
> diff --git a/daemon/btrfs.c b/daemon/btrfs.c
> index ab3babc..62f07f3 100644
> --- a/daemon/btrfs.c
> +++ b/daemon/btrfs.c
> @@ -619,3 +619,20 @@ do_btrfs_set_seeding (const char *device, int svalue)
>    free (err);
>    return r;
>  }
> +
> +int
> +do_btrfs_fsck (const char *device)
> +{
> +  char *err;
> +  int r;
> +
> +  r = commandr (NULL, &err, "btrfsck", device, NULL);
> +  if (r == -1) {
> +    reply_with_error ("%s: %s", device, err);
> +    free (err);
> +    return -1;
> +  }
> +
> +  free (err);
> +  return r;
> +}

This worries me.  Isn't btrfsck interactive?  Ordinary fsck has a
meaningful exit code, but btrfsck doesn't.  Will it get one in future?

> diff --git a/generator/generator_actions.ml b/generator/generator_actions.ml
> index fc2df42..33ffd6b 100644
> --- a/generator/generator_actions.ml
> +++ b/generator/generator_actions.ml
> @@ -7232,6 +7232,17 @@ If C<devices> is an empty list, this does nothing.");
>  Enable or disable the seeding feature of a device that contains
>  a btrfs filesystem.");
>  
> +  ("btrfs_fsck", (RErr, [Device "device"], []), 332, [Optional "btrfs"],
> +   [InitPartition, IfAvailable "btrfs", TestRun (
> +     [["mkfs_btrfs"; "/dev/sda1"; ""; ""; "NOARG"; ""; "NOARG"; "NOARG"; ""; ""];
> +      ["btrfs_fsck"; "/dev/sda1"]])],
> +   "check a btrfs filesystem",
> +   "\
> +Used to check a btrfs filesystem, C<device> is the device file where the
> +filesystem is stored.

Put a blank line between paragraphs.

> +NOTE: Btrfs is currently under heavy development, and not suitable for any
> +uses other than benchmarking and review.");

Instead of "NOTE:", it's better to use I<Note:> or B<Note:>
(see perlpod(1)).

Rich.

-- 
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