mirror of
https://github.com/freebsd/freebsd-src
synced 2024-10-17 05:43:59 +00:00
Implement the -z (zero counters) option for the various bpf counters.
Add necessary changes to the kernel for this (basically introduce a bpf_zero_counters() function). As well, update the man page. MFC after: 1 month Discussed with: rwatson
This commit is contained in:
parent
80b807fef2
commit
0e37f3e196
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=194512
|
@ -2032,6 +2032,35 @@ bpf_drvinit(void *unused)
|
|||
|
||||
}
|
||||
|
||||
/*
|
||||
* Zero out the various packet counters associated with all of the bpf
|
||||
* descriptors. At some point, we will probably want to get a bit more
|
||||
* granular and allow the user to specify descriptors to be zeroed.
|
||||
*/
|
||||
static void
|
||||
bpf_zero_counters(void)
|
||||
{
|
||||
struct bpf_if *bp;
|
||||
struct bpf_d *bd;
|
||||
|
||||
mtx_lock(&bpf_mtx);
|
||||
LIST_FOREACH(bp, &bpf_iflist, bif_next) {
|
||||
BPFIF_LOCK(bp);
|
||||
LIST_FOREACH(bd, &bp->bif_dlist, bd_next) {
|
||||
BPFD_LOCK(bd);
|
||||
bd->bd_rcount = 0;
|
||||
bd->bd_dcount = 0;
|
||||
bd->bd_fcount = 0;
|
||||
bd->bd_wcount = 0;
|
||||
bd->bd_wfcount = 0;
|
||||
bd->bd_zcopy = 0;
|
||||
BPFD_UNLOCK(bd);
|
||||
}
|
||||
BPFIF_UNLOCK(bp);
|
||||
}
|
||||
mtx_unlock(&bpf_mtx);
|
||||
}
|
||||
|
||||
static void
|
||||
bpfstats_fill_xbpf(struct xbpf_d *d, struct bpf_d *bd)
|
||||
{
|
||||
|
@ -2066,7 +2095,7 @@ bpfstats_fill_xbpf(struct xbpf_d *d, struct bpf_d *bd)
|
|||
static int
|
||||
bpf_stats_sysctl(SYSCTL_HANDLER_ARGS)
|
||||
{
|
||||
struct xbpf_d *xbdbuf, *xbd;
|
||||
struct xbpf_d *xbdbuf, *xbd, zerostats;
|
||||
int index, error;
|
||||
struct bpf_if *bp;
|
||||
struct bpf_d *bd;
|
||||
|
@ -2080,6 +2109,21 @@ bpf_stats_sysctl(SYSCTL_HANDLER_ARGS)
|
|||
error = priv_check(req->td, PRIV_NET_BPF);
|
||||
if (error)
|
||||
return (error);
|
||||
/*
|
||||
* Check to see if the user is requesting that the counters be
|
||||
* zeroed out. Explicitly check that the supplied data is zeroed,
|
||||
* as we aren't allowing the user to set the counters currently.
|
||||
*/
|
||||
if (req->newptr != NULL) {
|
||||
if (req->newlen != sizeof(zerostats))
|
||||
return (EINVAL);
|
||||
bzero(&zerostats, sizeof(zerostats));
|
||||
xbd = req->newptr;
|
||||
if (bcmp(xbd, &zerostats, sizeof(*xbd)) != 0)
|
||||
return (EINVAL);
|
||||
bpf_zero_counters();
|
||||
return (0);
|
||||
}
|
||||
if (req->oldptr == NULL)
|
||||
return (SYSCTL_OUT(req, 0, bpf_bpfd_cnt * sizeof(*xbd)));
|
||||
if (bpf_bpfd_cnt == 0)
|
||||
|
|
|
@ -91,10 +91,17 @@ bpf_flags(struct xbpf_d *bd, char *flagbuf)
|
|||
void
|
||||
bpf_stats(char *ifname)
|
||||
{
|
||||
struct xbpf_d *d, *bd;
|
||||
struct xbpf_d *d, *bd, zerostat;
|
||||
char *pname, flagbuf[12];
|
||||
size_t size;
|
||||
|
||||
if (zflag) {
|
||||
bzero(&zerostat, sizeof(zerostat));
|
||||
if (sysctlbyname("net.bpf.stats", NULL, NULL,
|
||||
&zerostat, sizeof(zerostat)) < 0)
|
||||
warn("failed to zero bpf counters");
|
||||
return;
|
||||
}
|
||||
if (sysctlbyname("net.bpf.stats", NULL, &size,
|
||||
NULL, 0) < 0) {
|
||||
warn("net.bpf.stats");
|
||||
|
|
|
@ -198,6 +198,7 @@ The network manages a private pool of memory buffers.
|
|||
.Bk -words
|
||||
.Nm
|
||||
.Fl B
|
||||
.Op Fl z
|
||||
.Op Fl I Ar interface
|
||||
.Ek
|
||||
.Xc
|
||||
|
|
Loading…
Reference in a new issue