Re: [Qemu-devel] [PATCH 14/14] qapi: convert screendump

[Alon Levy <alevy@redhat.com>]

On Fri, May 25, 2012 at 04:41:19PM -0300, Luiz Capitulino wrote:

One small note below.

> Also activates error reporting from devices.
> 
> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
> ---
>  console.c        |  7 ++++---
>  console.h        |  1 -
>  hmp-commands.hx  |  5 ++---
>  hmp.c            |  9 +++++++++
>  hmp.h            |  1 +
>  monitor.c        |  6 ------
>  qapi-schema.json | 24 ++++++++++++++++++++++++
>  qmp-commands.hx  |  5 +----
>  8 files changed, 41 insertions(+), 17 deletions(-)
> 
> diff --git a/console.c b/console.c
> index 4669e62..2bbf104 100644
> --- a/console.c
> +++ b/console.c
> @@ -24,6 +24,7 @@
>  #include "qemu-common.h"
>  #include "console.h"
>  #include "qemu-timer.h"
> +#include "qmp-commands.h"
>  
>  //#define DEBUG_CONSOLE
>  #define DEFAULT_BACKSCROLL 512
> @@ -173,7 +174,7 @@ void vga_hw_invalidate(void)
>          active_console->hw_invalidate(active_console->hw);
>  }
>  
> -void vga_hw_screen_dump(const char *filename)
> +void qmp_screendump(const char *filename, Error **errp)
>  {
>      TextConsole *previous_active_console;
>      bool cswitch;
> @@ -187,9 +188,9 @@ void vga_hw_screen_dump(const char *filename)
>          console_select(0);
>      }
>      if (consoles[0] && consoles[0]->hw_screen_dump) {
> -        consoles[0]->hw_screen_dump(consoles[0]->hw, filename, cswitch, NULL);
> +        consoles[0]->hw_screen_dump(consoles[0]->hw, filename, cswitch, errp);
>      } else {
> -        error_report("screen dump not implemented");
> +        error_set(errp, QERR_NOT_SUPPORTED);
>      }
>  
>      if (cswitch) {
> diff --git a/console.h b/console.h
> index 9caeb43..d72c546 100644
> --- a/console.h
> +++ b/console.h
> @@ -356,7 +356,6 @@ DisplayState *graphic_console_init(vga_hw_update_ptr update,
>  
>  void vga_hw_update(void);
>  void vga_hw_invalidate(void);
> -void vga_hw_screen_dump(const char *filename);
>  void vga_hw_text_update(console_ch_t *chardata);
>  
>  int is_graphic_console(void);
> diff --git a/hmp-commands.hx b/hmp-commands.hx
> index 18cb415..74f61bc 100644
> --- a/hmp-commands.hx
> +++ b/hmp-commands.hx
> @@ -193,9 +193,8 @@ ETEXI
>          .name       = "screendump",
>          .args_type  = "filename:F",
>          .params     = "filename",
> -        .help       = "save screen into PPM image 'filename'",
> -        .user_print = monitor_user_noop,
> -        .mhandler.cmd_new = do_screen_dump,
> +        .help       = "save screen into PPM image 'filepath'",
> +        .mhandler.cmd = hmp_screen_dump,
>      },
>  
>  STEXI
> diff --git a/hmp.c b/hmp.c
> index bb0952e..7e8c0ab 100644
> --- a/hmp.c
> +++ b/hmp.c
> @@ -947,3 +947,12 @@ void hmp_device_del(Monitor *mon, const QDict *qdict)
>      qmp_device_del(id, &err);
>      hmp_handle_error(mon, &err);
>  }
> +
> +void hmp_screen_dump(Monitor *mon, const QDict *qdict)
> +{
> +    const char *filename = qdict_get_str(qdict, "filename");
> +    Error *err = NULL;
> +
> +    qmp_screendump(filename, &err);
> +    hmp_handle_error(mon, &err);
> +}
> diff --git a/hmp.h b/hmp.h
> index 443b812..fa75ec0 100644
> --- a/hmp.h
> +++ b/hmp.h
> @@ -61,5 +61,6 @@ void hmp_block_job_set_speed(Monitor *mon, const QDict *qdict);
>  void hmp_block_job_cancel(Monitor *mon, const QDict *qdict);
>  void hmp_migrate(Monitor *mon, const QDict *qdict);
>  void hmp_device_del(Monitor *mon, const QDict *qdict);
> +void hmp_screen_dump(Monitor *mon, const QDict *qdict);
>  
>  #endif
> diff --git a/monitor.c b/monitor.c
> index 12a6fe2..1160af7 100644
> --- a/monitor.c
> +++ b/monitor.c
> @@ -897,12 +897,6 @@ static int client_migrate_info(Monitor *mon, const QDict *qdict,
>      return -1;
>  }
>  
> -static int do_screen_dump(Monitor *mon, const QDict *qdict, QObject **ret_data)
> -{
> -    vga_hw_screen_dump(qdict_get_str(qdict, "filename"));
> -    return 0;
> -}
> -
>  static void do_logfile(Monitor *mon, const QDict *qdict)
>  {
>      cpu_set_log_filename(qdict_get_str(qdict, "filename"));
> diff --git a/qapi-schema.json b/qapi-schema.json
> index 2ca7195..43d4acd 100644
> --- a/qapi-schema.json
> +++ b/qapi-schema.json
> @@ -1755,3 +1755,27 @@
>  # Since: 0.14.0
>  ##
>  { 'command': 'device_del', 'data': {'id': 'str'} }
> +
> +##
> +# @screendump:
> +#
> +# Write a PPM of the VGA screen to a file.
> +#
> +# @filename: the path of a new PPM file to store the image
> +#
> +# Since: 0.14.0
> +#
> +# Returns: Nothing on success
> +#   If the underlying device doesn't support screen dump, NotSupported
> +#   If access to the file is not allowed, InvalidAccess
> +#   If QEMU has too many open files, TooManyFilesByProcess
> +#   If the system has too many open files, TooManyFilesInSystem
> +#   If @filename is too long, NameTooLong
> +#   If the system doesn't have enough space, NoSpace
> +#   If the file-system to write the file to is read-only, ReadOnlyFileSystem
> +#   If opening @filename fails for an uknown reason, OpenFileFailed
> +#   If @filename becames too big, FileTooBig
> +#   If an I/O happens while writing @filename, IOError

If an I/O _error_ happens ...

Note: you expect this to be duplicated for other commands writing &
creating files, i.e. commands that will have all of the above error
conditions?

> +#
> +##
> +{ 'command': 'screendump', 'data': {'filename': 'str'} }
> diff --git a/qmp-commands.hx b/qmp-commands.hx
> index db980fa..2a3e6d5 100644
> --- a/qmp-commands.hx
> +++ b/qmp-commands.hx
> @@ -146,10 +146,7 @@ EQMP
>      {
>          .name       = "screendump",
>          .args_type  = "filename:F",
> -        .params     = "filename",
> -        .help       = "save screen into PPM image 'filename'",
> -        .user_print = monitor_user_noop,
> -        .mhandler.cmd_new = do_screen_dump,
> +        .mhandler.cmd_new = qmp_marshal_input_screendump,
>      },
>  
>  SQMP
> -- 
> 1.7.10.2.565.gbd578b5
> 
>