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LinuxKPI: add net_ratelimit()

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Add a net_ratelimit() compat implementation based on ppsratecheck().
Add a sysctl to allow tuning of the number of messages.

Sponsored-by:	The FreeBSD Foundation
MFC-after:	2 weeks
Reviewed-by:	hselasky
Differential Revision:	https://reviews.freebsd.org/D29399
This commit is contained in:
Bjoern A. Zeeb 2021-03-23 17:00:22 +00:00
parent a9f0367b04
commit bc042266b2
2 changed files with 25 additions and 0 deletions
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10
sys/compat/linuxkpi/common/include/linux/net.h
View file

@ -76,4 +76,14 @@ sock_release(struct socket *so)
soclose(so);
}
int linuxkpi_net_ratelimit(void);
static inline int
net_ratelimit(void)
{
return (linuxkpi_net_ratelimit());
}
#endif /* _LINUX_NET_H_ */

15
sys/compat/linuxkpi/common/src/linux_compat.c
View file

@ -51,6 +51,7 @@ __FBSDID("$FreeBSD$");
#include <sys/rwlock.h>
#include <sys/mman.h>
#include <sys/stack.h>
#include <sys/time.h>
#include <sys/user.h>
#include <vm/vm.h>
@ -99,6 +100,12 @@ int linuxkpi_debug;
SYSCTL_INT(_compat_linuxkpi, OID_AUTO, debug, CTLFLAG_RWTUN,
&linuxkpi_debug, 0, "Set to enable pr_debug() prints. Clear to disable.");
static struct timeval lkpi_net_lastlog;
static int lkpi_net_curpps;
static int lkpi_net_maxpps = 99;
SYSCTL_INT(_compat_linuxkpi, OID_AUTO, net_ratelimit, CTLFLAG_RWTUN,
&lkpi_net_maxpps, 0, "Limit number of LinuxKPI net messages per second.");
MALLOC_DEFINE(M_KMALLOC, "linux", "Linux kmalloc compat");
#include <linux/rbtree.h>
@ -2511,6 +2518,14 @@ linux_dump_stack(void)
#endif
}
int
linuxkpi_net_ratelimit(void)
{
return (ppsratecheck(&lkpi_net_lastlog, &lkpi_net_curpps,
lkpi_net_maxpps));
}
#if defined(__i386__) || defined(__amd64__)
bool linux_cpu_has_clflush;
#endif