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Add compat.linux.debug sysctl, to make it possible to silence down

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the debug messages. While here, clean up some variable naming.

Reviewed by:	bcr (manpages), emaste
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D25230
This commit is contained in:
Edward Tomasz Napierala 2020-06-12 14:37:50 +00:00
parent 599dadca55
commit 462171d9aa
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=362104
4 changed files with 13 additions and 1 deletions
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6
share/man/man4/linux.4
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@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd June 10, 2020
.Dd June 12, 2020
.Dt LINUX 4
.Os
.Sh NAME
@ -95,6 +95,10 @@ variables and
.Xr loader 8
tunables:
.Bl -tag -width indent
.It Va compat.linux.debug
Enable debugging messages.
Set to 0 to silence them.
Defaults to 1.
.It Va compat.linux.default_openfiles
Default soft openfiles resource limit for Linux applications.
Set to -1 to disable the limit.

4
sys/compat/linux/linux_mib.c
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@ -63,6 +63,10 @@ static unsigned linux_osd_jail_slot;
SYSCTL_NODE(_compat, OID_AUTO, linux, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
"Linux mode");
int linux_debug = 1;
SYSCTL_INT(_compat_linux, OID_AUTO, debug, CTLFLAG_RWTUN,
&linux_debug, 0, "Log warnings from linux(4); or 0 to disable");
int linux_default_openfiles = 1024;
SYSCTL_INT(_compat_linux, OID_AUTO, default_openfiles, CTLFLAG_RWTUN,
&linux_default_openfiles, 0,

1
sys/compat/linux/linux_mib.h
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@ -62,6 +62,7 @@ int linux_kernver(struct thread *td);
#define linux_use26(t) (linux_kernver(t) >= LINUX_KERNVER_2006000)
extern int linux_debug;
extern int linux_default_openfiles;
extern int linux_ignore_ip_recverr;
extern int linux_preserve_vstatus;

3
sys/compat/linux/linux_util.c
View File

@ -91,6 +91,9 @@ linux_msg(const struct thread *td, const char *fmt, ...)
va_list ap;
struct proc *p;
if (linux_debug == 0)
return;
p = td->td_proc;
printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm);
va_start(ap, fmt);