CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2016/04/14 02:27:24
Modified files:
sys/net : bpf.c
sys/sys : conf.h
Log message:
Enable device cloning for bpf. This allows to have just one bpf device
node in /dev, that services all bpf consumers (up to 1024). Also,
disallow the usage of all but the first minor device, so accidental use
of another minor device will attract attention.
Cloning bpf offers some advantages:
- Users with high bpf usage won't have to clutter their /dev with device
nodes.
- A lot of programs in base use a pattern like this to acces bpf:
int fd, n = 0;
do {
(void)snprintf(device, sizeof device, "/dev/bpf%d", n++);
fd = open(device, mode);
} while (fd < 0 && errno == EBUSY);
Those can now be replaced by a simple open(), without loop.
ok mikeb
"right time in the cycle to try" deraadt
