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pf: Add static DTrace probe points

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These two have proven to be useful during debugging. We may as well keep
them permanently.
Others will be added as their utility becomes clear.

Reviewed by:	gnn
MFC after:	2 weeks
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D29555
This commit is contained in:
Kristof Provost 2021-04-02 15:53:34 +02:00
parent 829a69db85
commit f4c0290916
1 changed files with 15 additions and 0 deletions
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15
sys/netpfil/pf/pf.c
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@ -59,6 +59,7 @@ __FBSDID("$FreeBSD$");
#include <sys/md5.h>
#include <sys/random.h>
#include <sys/refcount.h>
#include <sys/sdt.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
@ -112,6 +113,15 @@ __FBSDID("$FreeBSD$");
#define DPFPRINTF(n, x) if (V_pf_status.debug >= (n)) printf x
SDT_PROVIDER_DEFINE(pf);
SDT_PROBE_DEFINE4(pf, ip, test, done, "int", "int", "struct pf_krule *",
"struct pf_state *");
SDT_PROBE_DEFINE4(pf, ip, test6, done, "int", "int", "struct pf_krule *",
"struct pf_state *");
SDT_PROBE_DEFINE5(pf, ip, state, lookup, "struct pfi_kkif *",
"struct pf_state_key_cmp *", "int", "struct pf_pdesc *",
"struct pf_state *");
/*
* Global variables
*/
@ -326,6 +336,7 @@ VNET_DEFINE(struct pf_limit, pf_limits[PF_LIMIT_MAX]);
#define STATE_LOOKUP(i, k, d, s, pd) \
do { \
(s) = pf_find_state((i), (k), (d)); \
SDT_PROBE5(pf, ip, state, lookup, i, k, d, pd, (s)); \
if ((s) == NULL) \
return (PF_DROP); \
if (PACKET_LOOPED(pd)) \
@ -6318,6 +6329,8 @@ pf_test(int dir, int pflags, struct ifnet *ifp, struct mbuf **m0, struct inpcb *
if (s)
PF_STATE_UNLOCK(s);
SDT_PROBE4(pf, ip, test, done, action, reason, r, s);
return (action);
}
#endif /* INET */
@ -6726,6 +6739,8 @@ pf_test6(int dir, int pflags, struct ifnet *ifp, struct mbuf **m0, struct inpcb
(mtag = m_tag_find(m, PF_REASSEMBLED, NULL)) != NULL)
action = pf_refragment6(ifp, m0, mtag);
SDT_PROBE4(pf, ip, test6, done, action, reason, r, s);
return (action);
}
#endif /* INET6 */