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While waiting for the bpf hold buffer to become idle, check

Browse source 
the return value from mtx_sleep() and exit bpfread() on
errors such as EINTR.

Reviewed by:	jhb
This commit is contained in:
Guy Helmer 2013-05-23 21:33:10 +00:00
parent 92981fdf9e
commit d013d9022a
1 changed files with 7 additions and 2 deletions
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9
sys/net/bpf.c
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@ -856,9 +856,14 @@ bpfread(struct cdev *dev, struct uio *uio, int ioflag)
callout_stop(&d->bd_callout);
timed_out = (d->bd_state == BPF_TIMED_OUT);
d->bd_state = BPF_IDLE;
while (d->bd_hbuf_in_use)
mtx_sleep(&d->bd_hbuf_in_use, &d->bd_lock,
while (d->bd_hbuf_in_use) {
error = mtx_sleep(&d->bd_hbuf_in_use, &d->bd_lock,
PRINET|PCATCH, "bd_hbuf", 0);
if (error != 0) {
BPFD_UNLOCK(d);
return (error);
}
}
/*
* If the hold buffer is empty, then do a timed sleep, which
* ends when the timeout expires or when enough packets