git: 8c0d1eca7834 - main - sockbuf: retain backward compatibility with userland after d59bc188d652

From: Alexander V. Chernikov <melifaro_at_FreeBSD.org>
Date: Mon, 30 May 2022 15:10:59 UTC 
The branch main has been updated by melifaro:

URL: https://cgit.FreeBSD.org/src/commit/?id=8c0d1eca7834bfd5a05c86bf20a7600917057492

commit 8c0d1eca7834bfd5a05c86bf20a7600917057492
Author:     Alexander V. Chernikov <melifaro@FreeBSD.org>
AuthorDate: 2022-05-30 14:56:25 +0000
Commit:     Alexander V. Chernikov <melifaro@FreeBSD.org>
CommitDate: 2022-05-30 15:10:53 +0000

    sockbuf: retain backward compatibility with userland after d59bc188d652
    
    Add spare fields to xsockbuf in place of sb_mcnt / sb_ccnt to avoid
     rebuilding userland binaries like sockstat(1).
    
    Reviewed by:    glebius
---
 sys/sys/socketvar.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/sys/socketvar.h b/sys/sys/socketvar.h
index 52b9376f0559..249e0800f915 100644
--- a/sys/sys/socketvar.h
+++ b/sys/sys/socketvar.h
@@ -577,6 +577,8 @@ struct xsocket {
 		uint32_t	sb_cc;
 		uint32_t	sb_hiwat;
 		uint32_t	sb_mbcnt;
+		uint32_t	sb_spare0;	/* was sb_mcnt */
+		uint32_t	sb_spare1;	/* was sb_ccnt */
 		uint32_t	sb_mbmax;
 		int32_t		sb_lowat;
 		int32_t		sb_timeo;