Re: [Libguestfs] [PATCH 7/8] New API: btrfs_qgroup_create

Richard W.M. Jones
Fri, 05 Dec 2014 12:35:39 -0000

On Tue, Dec 02, 2014 at 05:33:37PM +0800, Hu Tao wrote:
> btrfs_qgroup_create creates a new qgroup.
>
> Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
> ---
>  daemon/btrfs.c       | 32 ++++++++++++++++++++++++++++++++
>  generator/actions.ml |  9 +++++++++
>  src/MAX_PROC_NR      |  2 +-
>  3 files changed, 42 insertions(+), 1 deletion(-)
>
> diff --git a/daemon/btrfs.c b/daemon/btrfs.c
> index 033d460..dccaf5a 100644
> --- a/daemon/btrfs.c
> +++ b/daemon/btrfs.c
> @@ -1120,3 +1120,35 @@ int do_btrfs_qgroup_limit (const char *subvolume,
const char *size)
>
>    return 0;
>  }
> +
> +int do_btrfs_qgroup_create (const char *qgroupid, const char *subvolume)
> +{
> +  const size_t MAX_ARGS = 64;
> +  const char *argv[MAX_ARGS];
> +  size_t i = 0;
> +  CLEANUP_FREE char *subvolume_buf = NULL;
> +  CLEANUP_FREE char *err = NULL;
> +  CLEANUP_FREE char *out = NULL;
> +  int r;
> +
> +  subvolume_buf = sysroot_path (subvolume);
> +  if (subvolume_buf == NULL) {
> +    reply_with_perror ("malloc");
> +    return -1;
> +  }
> +
> +  ADD_ARG (argv, i, str_btrfs);
> +  ADD_ARG (argv, i, "qgroup");
> +  ADD_ARG (argv, i, "create");
> +  ADD_ARG (argv, i, qgroupid);
> +  ADD_ARG (argv, i, subvolume_buf);
> +  ADD_ARG (argv, i, NULL);
> +
> +  r = commandv (&out, &err, argv);
> +  if (r == -1) {
> +    reply_with_error ("%s: %s", subvolume, err);
> +    return -1;
> +  }
> +
> +  return 0;
> +}
> diff --git a/generator/actions.ml b/generator/actions.ml
> index 5d64350..608ddf6 100644
> --- a/generator/actions.ml
> +++ b/generator/actions.ml
> @@ -12082,6 +12082,15 @@ Trash all qgroup numbers and scan the metadata
again with the current config." }
>  Limit the size of a subvolume which's path is C<subvolume>.
C<size>
>  can have suffix of G, M, or K. " };
>
> +  { defaults with
> +    name = "btrfs_qgroup_create";
> +    style = RErr, [String "qgroupid"; Pathname
"subvolume"], [];
> +    proc_nr = Some 431;
> +    optional = Some "btrfs"; camel_name =
"BTRFSQgroupCreate";
> +    shortdesc = "create a subvolume quota group";
> +    longdesc = "\
> +Create a quota group (qgroup) for subvolume at C<subvolume>."
};
> +
>  ]
>
>  (* Non-API meta-commands available only in guestfish.
> diff --git a/src/MAX_PROC_NR b/src/MAX_PROC_NR
> index c15fb93..ed4f162 100644
> --- a/src/MAX_PROC_NR
> +++ b/src/MAX_PROC_NR
> @@ -1 +1 @@
> -430
> +431

Seems OK, but there needs to be a test of qgroups.

Rich.

--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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