Re: [Qemu-devel] [PATCH 3/4] hw/9pfs: make get_st_gen() return ENOTTY error on special files

["Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>]

"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> writes:

> Currently we silently ignore getversion requests for anything except
> file or directory. Let's instead return ENOTTY error to indicate that
> getversion is not supported. It makes implementation consistent on
> all not-supported cases.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

> ---
>  hw/9pfs/virtio-9p-handle.c | 3 ++-
>  hw/9pfs/virtio-9p-local.c  | 3 ++-
>  hw/9pfs/virtio-9p-proxy.c  | 3 ++-
>  3 files changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/hw/9pfs/virtio-9p-handle.c b/hw/9pfs/virtio-9p-handle.c
> index ed8c126e1d6c..17002a3d2867 100644
> --- a/hw/9pfs/virtio-9p-handle.c
> +++ b/hw/9pfs/virtio-9p-handle.c
> @@ -591,7 +591,8 @@ static int handle_ioc_getversion(FsContext *ctx, V9fsPath *path,
>       * We can get fd for regular files and directories only
>       */
>      if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) {
> -            return 0;
> +        errno = ENOTTY;
> +        return -1;
>      }
>      err = handle_open(ctx, path, O_RDONLY, &fid_open);
>      if (err < 0) {
> diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
> index 9be8854e9148..df0dbffa7ac4 100644
> --- a/hw/9pfs/virtio-9p-local.c
> +++ b/hw/9pfs/virtio-9p-local.c
> @@ -1077,7 +1077,8 @@ static int local_ioc_getversion(FsContext *ctx, V9fsPath *path,
>       * We can get fd for regular files and directories only
>       */
>      if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) {
> -            return 0;
> +        errno = ENOTTY;
> +        return -1;
>      }
>      err = local_open(ctx, path, O_RDONLY, &fid_open);
>      if (err < 0) {
> diff --git a/hw/9pfs/virtio-9p-proxy.c b/hw/9pfs/virtio-9p-proxy.c
> index 5f44bb758b35..b57966d9d883 100644
> --- a/hw/9pfs/virtio-9p-proxy.c
> +++ b/hw/9pfs/virtio-9p-proxy.c
> @@ -1086,7 +1086,8 @@ static int proxy_ioc_getversion(FsContext *fs_ctx, V9fsPath *path,
>       * we can get fd for regular files and directories only
>       */
>      if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) {
> -        return 0;
> +        errno = ENOTTY;
> +        return -1;
>      }
>      err = v9fs_request(fs_ctx->private, T_GETVERSION, st_gen, "s", path);
>      if (err < 0) {
> -- 
> 1.8.5.2