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[Qemu-devel] [PATCH v6 10/13] hmp: add hmp analogue for qmp-chardev-change

Anton Nefedov posted 13 patches 8 years, 7 months ago
[Qemu-devel] [PATCH v6 10/13] hmp: add hmp analogue for qmp-chardev-change
Posted by Anton Nefedov 8 years, 7 months ago 
Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 include/chardev/char.h | 10 ++++++++++
 hmp.h                  |  1 +
 chardev/char.c         |  2 +-
 hmp-commands.hx        | 18 +++++++++++++++++-
 hmp.c                  | 34 ++++++++++++++++++++++++++++++++++
 tests/test-hmp.c       |  1 +
 6 files changed, 64 insertions(+), 2 deletions(-)

diff --git a/include/chardev/char.h b/include/chardev/char.h
index 22fd734..1604ea9 100644
--- a/include/chardev/char.h
+++ b/include/chardev/char.h
@@ -81,6 +81,16 @@ Chardev *qemu_chr_new_from_opts(QemuOpts *opts,
 void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend);
 
 /**
+ * @qemu_chr_parse_opts:
+ *
+ * Parse the options to the ChardevBackend struct.
+ *
+ * Returns: a new backend or NULL on error
+ */
+ChardevBackend *qemu_chr_parse_opts(QemuOpts *opts,
+                                    Error **errp);
+
+/**
  * @qemu_chr_new:
  *
  * Create a new character backend from a URI.
diff --git a/hmp.h b/hmp.h
index 214b261..1ff4552 100644
--- a/hmp.h
+++ b/hmp.h
@@ -102,6 +102,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qdict);
 void hmp_nbd_server_add(Monitor *mon, const QDict *qdict);
 void hmp_nbd_server_stop(Monitor *mon, const QDict *qdict);
 void hmp_chardev_add(Monitor *mon, const QDict *qdict);
+void hmp_chardev_change(Monitor *mon, const QDict *qdict);
 void hmp_chardev_remove(Monitor *mon, const QDict *qdict);
 void hmp_chardev_send_break(Monitor *mon, const QDict *qdict);
 void hmp_qemu_io(Monitor *mon, const QDict *qdict);
diff --git a/chardev/char.c b/chardev/char.c
index d6b9d89..c34b44a 100644
--- a/chardev/char.c
+++ b/chardev/char.c
@@ -567,7 +567,7 @@ static const char *chardev_alias_translate(const char *name)
     return name;
 }
 
-static ChardevBackend *qemu_chr_parse_opts(QemuOpts *opts, Error **errp)
+ChardevBackend *qemu_chr_parse_opts(QemuOpts *opts, Error **errp)
 {
     Error *local_err = NULL;
     const ChardevClass *cc;
diff --git a/hmp-commands.hx b/hmp-commands.hx
index 275ccdf..c4c96db 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1724,7 +1724,23 @@ ETEXI
 STEXI
 @item chardev-add args
 @findex chardev-add
-chardev_add accepts the same parameters as the -chardev command line switch.
+chardev-add accepts the same parameters as the -chardev command line switch.
+
+ETEXI
+
+    {
+        .name       = "chardev-change",
+        .args_type  = "id:s,args:s",
+        .params     = "id args",
+        .help       = "change chardev",
+        .cmd        = hmp_chardev_change,
+    },
+
+STEXI
+@item chardev-change args
+@findex chardev-change
+chardev-change accepts existing chardev @var{id} and then the same arguments
+as the -chardev command line switch (except for "id").
 
 ETEXI
 
diff --git a/hmp.c b/hmp.c
index dee4028..1b443e1 100644
--- a/hmp.c
+++ b/hmp.c
@@ -2228,6 +2228,40 @@ void hmp_chardev_add(Monitor *mon, const QDict *qdict)
     hmp_handle_error(mon, &err);
 }
 
+void hmp_chardev_change(Monitor *mon, const QDict *qdict)
+{
+    const char *args = qdict_get_str(qdict, "args");
+    const char *id;
+    Error *err = NULL;
+    ChardevBackend *backend = NULL;
+    ChardevReturn *ret = NULL;
+    QemuOpts *opts = qemu_opts_parse_noisily(qemu_find_opts("chardev"), args,
+                                             true);
+    if (!opts) {
+        error_setg(&err, "Parsing chardev args failed");
+        goto end;
+    }
+
+    id = qdict_get_str(qdict, "id");
+    if (qemu_opts_id(opts)) {
+        error_setg(&err, "Unexpected 'id' parameter");
+        goto end;
+    }
+
+    backend = qemu_chr_parse_opts(opts, &err);
+    if (!backend) {
+        goto end;
+    }
+
+    ret = qmp_chardev_change(id, backend, &err);
+
+end:
+    qapi_free_ChardevReturn(ret);
+    qapi_free_ChardevBackend(backend);
+    qemu_opts_del(opts);
+    hmp_handle_error(mon, &err);
+}
+
 void hmp_chardev_remove(Monitor *mon, const QDict *qdict)
 {
     Error *local_err = NULL;
diff --git a/tests/test-hmp.c b/tests/test-hmp.c
index 6dfa0c3..d77b3c8 100644
--- a/tests/test-hmp.c
+++ b/tests/test-hmp.c
@@ -23,6 +23,7 @@ static const char *hmp_cmds[] = {
     "boot_set ndc",
     "chardev-add null,id=testchardev1",
     "chardev-send-break testchardev2",
+    "chardev-change testchardev1 ringbuf",
     "chardev-remove testchardev1",
     "commit all",
     "cpu-add 1",
-- 
2.7.4
Re: [Qemu-devel] [PATCH v6 10/13] hmp: add hmp analogue for qmp-chardev-change
Posted by Marc-André Lureau 8 years, 7 months ago 
On Thu, Jul 6, 2017 at 5:08 AM, Anton Nefedov
<anton.nefedov@virtuozzo.com> wrote:
> Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>


> ---
>  include/chardev/char.h | 10 ++++++++++
>  hmp.h                  |  1 +
>  chardev/char.c         |  2 +-
>  hmp-commands.hx        | 18 +++++++++++++++++-
>  hmp.c                  | 34 ++++++++++++++++++++++++++++++++++
>  tests/test-hmp.c       |  1 +
>  6 files changed, 64 insertions(+), 2 deletions(-)
>
> diff --git a/include/chardev/char.h b/include/chardev/char.h
> index 22fd734..1604ea9 100644
> --- a/include/chardev/char.h
> +++ b/include/chardev/char.h
> @@ -81,6 +81,16 @@ Chardev *qemu_chr_new_from_opts(QemuOpts *opts,
>  void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend);
>
>  /**
> + * @qemu_chr_parse_opts:
> + *
> + * Parse the options to the ChardevBackend struct.
> + *
> + * Returns: a new backend or NULL on error
> + */
> +ChardevBackend *qemu_chr_parse_opts(QemuOpts *opts,
> +                                    Error **errp);
> +
> +/**
>   * @qemu_chr_new:
>   *
>   * Create a new character backend from a URI.
> diff --git a/hmp.h b/hmp.h
> index 214b261..1ff4552 100644
> --- a/hmp.h
> +++ b/hmp.h
> @@ -102,6 +102,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qdict);
>  void hmp_nbd_server_add(Monitor *mon, const QDict *qdict);
>  void hmp_nbd_server_stop(Monitor *mon, const QDict *qdict);
>  void hmp_chardev_add(Monitor *mon, const QDict *qdict);
> +void hmp_chardev_change(Monitor *mon, const QDict *qdict);
>  void hmp_chardev_remove(Monitor *mon, const QDict *qdict);
>  void hmp_chardev_send_break(Monitor *mon, const QDict *qdict);
>  void hmp_qemu_io(Monitor *mon, const QDict *qdict);
> diff --git a/chardev/char.c b/chardev/char.c
> index d6b9d89..c34b44a 100644
> --- a/chardev/char.c
> +++ b/chardev/char.c
> @@ -567,7 +567,7 @@ static const char *chardev_alias_translate(const char *name)
>      return name;
>  }
>
> -static ChardevBackend *qemu_chr_parse_opts(QemuOpts *opts, Error **errp)
> +ChardevBackend *qemu_chr_parse_opts(QemuOpts *opts, Error **errp)
>  {
>      Error *local_err = NULL;
>      const ChardevClass *cc;
> diff --git a/hmp-commands.hx b/hmp-commands.hx
> index 275ccdf..c4c96db 100644
> --- a/hmp-commands.hx
> +++ b/hmp-commands.hx
> @@ -1724,7 +1724,23 @@ ETEXI
>  STEXI
>  @item chardev-add args
>  @findex chardev-add
> -chardev_add accepts the same parameters as the -chardev command line switch.
> +chardev-add accepts the same parameters as the -chardev command line switch.
> +
> +ETEXI
> +
> +    {
> +        .name       = "chardev-change",
> +        .args_type  = "id:s,args:s",
> +        .params     = "id args",
> +        .help       = "change chardev",
> +        .cmd        = hmp_chardev_change,
> +    },
> +
> +STEXI
> +@item chardev-change args
> +@findex chardev-change
> +chardev-change accepts existing chardev @var{id} and then the same arguments
> +as the -chardev command line switch (except for "id").
>
>  ETEXI
>
> diff --git a/hmp.c b/hmp.c
> index dee4028..1b443e1 100644
> --- a/hmp.c
> +++ b/hmp.c
> @@ -2228,6 +2228,40 @@ void hmp_chardev_add(Monitor *mon, const QDict *qdict)
>      hmp_handle_error(mon, &err);
>  }
>
> +void hmp_chardev_change(Monitor *mon, const QDict *qdict)
> +{
> +    const char *args = qdict_get_str(qdict, "args");
> +    const char *id;
> +    Error *err = NULL;
> +    ChardevBackend *backend = NULL;
> +    ChardevReturn *ret = NULL;
> +    QemuOpts *opts = qemu_opts_parse_noisily(qemu_find_opts("chardev"), args,
> +                                             true);
> +    if (!opts) {
> +        error_setg(&err, "Parsing chardev args failed");
> +        goto end;
> +    }
> +
> +    id = qdict_get_str(qdict, "id");
> +    if (qemu_opts_id(opts)) {
> +        error_setg(&err, "Unexpected 'id' parameter");
> +        goto end;
> +    }
> +
> +    backend = qemu_chr_parse_opts(opts, &err);
> +    if (!backend) {
> +        goto end;
> +    }
> +
> +    ret = qmp_chardev_change(id, backend, &err);
> +
> +end:
> +    qapi_free_ChardevReturn(ret);
> +    qapi_free_ChardevBackend(backend);
> +    qemu_opts_del(opts);
> +    hmp_handle_error(mon, &err);
> +}
> +
>  void hmp_chardev_remove(Monitor *mon, const QDict *qdict)
>  {
>      Error *local_err = NULL;
> diff --git a/tests/test-hmp.c b/tests/test-hmp.c
> index 6dfa0c3..d77b3c8 100644
> --- a/tests/test-hmp.c
> +++ b/tests/test-hmp.c
> @@ -23,6 +23,7 @@ static const char *hmp_cmds[] = {
>      "boot_set ndc",
>      "chardev-add null,id=testchardev1",
>      "chardev-send-break testchardev2",
> +    "chardev-change testchardev1 ringbuf",
>      "chardev-remove testchardev1",
>      "commit all",
>      "cpu-add 1",
> --
> 2.7.4
>
>



-- 
Marc-André Lureau

Patchew 2.1-devel-b67e4c2

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