Re: [RFC v4 1/9] block: add block layer APIs resembling Linux ZonedBlockDevice ioctls.

[Stefan Hajnoczi]

On Wed, Jul 13, 2022 at 07:12:17AM +0900, Damien Le Moal wrote:
> On 7/13/22 00:49, Stefan Hajnoczi wrote:
> > On Tue, Jul 12, 2022 at 10:13:37AM +0800, Sam Li wrote:
> >> @@ -1801,6 +1809,130 @@ static off_t copy_file_range(int in_fd, off_t 
> >> *in_off, int out_fd,
> >>  }
> >>  #endif
> >>  
> > 
> > Are the functions below within #ifdef __linux__?
> 
> We need more than that: linux AND blkzoned.h header present (meaning a
> recent kernel). So the ifdef should be "#if defined(CONFIG_BLKZONED)" or
> something like it, with CONFIG_BLKZONED defined for linux AND
> /usr/include/linux/blkzoned.h present.

Okay. Try adding the following to meson.build:

  config_host_data.set('HAVE_LINUX_BLKZONED_H', 
cc.has_header('linux/blkzoned.h'))

Then:

  #ifdef HAVE_LINUX_BLKZONED_H
  ...
  #endif /* HAVE_LINUX_BLKZONED_H */

Stefan

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