[Libguestfs] [PATCH 4/8] New API: btrfs_quota_disable

[Richard W.M. Jones]

On Tue, Dec 02, 2014 at 05:33:34PM +0800, Hu Tao wrote:
> btrfs_quota_disable disables quota for subvolumes.
> 
> Signed-off-by: Hu Tao <hutao at cn.fujitsu.com>
> ---
>  daemon/btrfs.c       | 31 +++++++++++++++++++++++++++++++
>  generator/actions.ml |  9 +++++++++
>  src/MAX_PROC_NR      |  2 +-
>  3 files changed, 41 insertions(+), 1 deletion(-)
> 
> diff --git a/daemon/btrfs.c b/daemon/btrfs.c
> index 31dd806..5fcb85b 100644
> --- a/daemon/btrfs.c
> +++ b/daemon/btrfs.c
> @@ -1026,3 +1026,34 @@ int do_btrfs_quota_enable (const char *path)
>  
>    return 0;
>  }
> +
> +int do_btrfs_quota_disable (const char *path)
> +{
> +  const size_t MAX_ARGS = 64;
> +  const char *argv[MAX_ARGS];
> +  size_t i = 0;
> +  CLEANUP_FREE char *path_buf = NULL;
> +  CLEANUP_FREE char *err = NULL;
> +  CLEANUP_FREE char *out = NULL;
> +  int r;
> +
> +  path_buf = sysroot_path (path);
> +  if (path_buf == NULL) {
> +    reply_with_perror ("malloc");
> +    return -1;
> +  }
> +
> +  ADD_ARG (argv, i, str_btrfs);
> +  ADD_ARG (argv, i, "quota");
> +  ADD_ARG (argv, i, "disable");
> +  ADD_ARG (argv, i, path_buf);
> +  ADD_ARG (argv, i, NULL);
> +
> +  r = commandv (&out, &err, argv);
> +  if (r == -1) {
> +    reply_with_error ("%s: %s", path, err);
> +    return -1;
> +  }
> +
> +  return 0;
> +}
> diff --git a/generator/actions.ml b/generator/actions.ml
> index 3af8380..ab1a07a 100644
> --- a/generator/actions.ml
> +++ b/generator/actions.ml
> @@ -12054,6 +12054,15 @@ Return detailed information of the subvolume." };
>      longdesc = "\
>  Enable subvolume quota support for filesystem which contains C<path>." };
>  
> +  { defaults with
> +    name = "btrfs_quota_disable";
> +    style = RErr, [Pathname "path"], [];
> +    proc_nr = Some 428;
> +    optional = Some "btrfs"; camel_name = "BTRFSQuotaDisable";
> +    shortdesc = "disable subvolume quota support";
> +    longdesc = "\
> +Disable subvolume quota support for filesystem which contains C<path>." };
> +
>  ]
>  
>  (* Non-API meta-commands available only in guestfish.
> diff --git a/src/MAX_PROC_NR b/src/MAX_PROC_NR
> index d2a1e59..43d371a 100644
> --- a/src/MAX_PROC_NR
> +++ b/src/MAX_PROC_NR
> @@ -1 +1 @@
> -427
> +428

ACK.

Could do with a test.

How about combining this with the previous API, so you'd have:

  guestfs_btrfs_quota (guestfs_h *g, int enable);

?

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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