Re: [Qemu-devel] [PATCH RFC v11 5/6] raw-posix: Add falloc and full preallocation option

[Max Reitz <mreitz@redhat.com>]

On 02.07.2014 10:17, Hu Tao wrote:
> This patch adds a new option preallocation for raw format, and implements
> falloc and full preallocation.
>
> Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
> ---
>   block/raw-posix.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++-------
>   1 file changed, 55 insertions(+), 7 deletions(-)
>
> diff --git a/block/raw-posix.c b/block/raw-posix.c
> index 58c51d8..5dcd465 100644
> --- a/block/raw-posix.c
> +++ b/block/raw-posix.c
> @@ -30,6 +30,7 @@
>   #include "block/thread-pool.h"
>   #include "qemu/iov.h"
>   #include "raw-aio.h"
> +#include "qapi/util.h"
>   
>   #if defined(__APPLE__) && (__MACH__)
>   #include <paths.h>
> @@ -1278,28 +1279,70 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
>       int fd;
>       int result = 0;
>       int64_t total_size = 0;
> +    PreallocMode prealloc = PREALLOC_MODE_OFF;
> +    char *buf = NULL;

It's not really necessary to initialize these two here, but it won't 
hurt either, of course (same thing later with num, which could have even 
been declared inside of the while loop).

Reviewed-by: Max Reitz <mreitz@redhat.com>