On Sat, Apr 08, 2023 at 05:16:42PM +0200, Donald Buczek wrote: > Hi, Sergei, > > On 4/4/23 16:08, Sergei Shtepa wrote: > > The block device filtering mechanism is an API that allows to attach > > block device filters. Block device filters allow perform additional > > processing for I/O units. > > [...] > > diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h > > index b7b56871029c..1848d62979a4 100644 > > --- a/include/uapi/linux/fs.h > > +++ b/include/uapi/linux/fs.h > > @@ -185,6 +185,11 @@ struct fsxattr { > > #define BLKROTATIONAL _IO(0x12,126) > > #define BLKZEROOUT _IO(0x12,127) > > #define BLKGETDISKSEQ _IOR(0x12,128,__u64) > > +/* 13* is defined in linux/blkzoned.h */ > > nit: This is already explained in the comment below your insert. My faul. But indeed, no need to duplicate that, instead the new ioctl opcodes should move below that existing comment.