virtiofsd: add FUSE_INIT map_alignment field

[Qemu-devel] [PATCH 0/3] virtiofsd: add FUSE_INIT map_alignment field

Stefan Hajnoczi posted 3 patches 4 years, 9 months ago

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contrib/virtiofsd/fuse_kernel.h   | 56 +++++++++++++++++++++----------
contrib/virtiofsd/fuse_lowlevel.c |  8 +++++
2 files changed, 47 insertions(+), 17 deletions(-)

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[Qemu-devel] [PATCH 0/3] virtiofsd: add FUSE_INIT map_alignment field

Posted by Stefan Hajnoczi 4 years, 9 months ago

The client must know the server's alignment constraints for FUSE_SETUPMAPPING
and FUSE_REMOVEMAPPING.  This is necessary because mmap(2)/munmap(2) have
alignment constraints and the guest may have a different page size from the
host.  The new FUSE_INIT map_alignment field communicates this information to
the client.

Stefan Hajnoczi (3):
  virtiofsd: sync up fuse.h Linux 5.1 header
  virtiofsd: add map_alignment to fuse_kernel.h
  virtiofsd: implement FUSE_INIT map_alignment field

 contrib/virtiofsd/fuse_kernel.h   | 56 +++++++++++++++++++++----------
 contrib/virtiofsd/fuse_lowlevel.c |  8 +++++
 2 files changed, 47 insertions(+), 17 deletions(-)

-- 
2.21.0

Re: [Qemu-devel] [PATCH 0/3] virtiofsd: add FUSE_INIT map_alignment field

Posted by Dr. David Alan Gilbert 4 years, 9 months ago

* Stefan Hajnoczi (stefanha@redhat.com) wrote:
> The client must know the server's alignment constraints for FUSE_SETUPMAPPING
> and FUSE_REMOVEMAPPING.  This is necessary because mmap(2)/munmap(2) have
> alignment constraints and the guest may have a different page size from the
> host.  The new FUSE_INIT map_alignment field communicates this information to
> the client.

OK, merged into my local world.

DAve

> Stefan Hajnoczi (3):
>   virtiofsd: sync up fuse.h Linux 5.1 header
>   virtiofsd: add map_alignment to fuse_kernel.h
>   virtiofsd: implement FUSE_INIT map_alignment field
> 
>  contrib/virtiofsd/fuse_kernel.h   | 56 +++++++++++++++++++++----------
>  contrib/virtiofsd/fuse_lowlevel.c |  8 +++++
>  2 files changed, 47 insertions(+), 17 deletions(-)
> 
> -- 
> 2.21.0
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK