Date: Tue, 11 Mar 2008 22:04:27 GMT From: Robert Watson <rwatson@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 137444 for review Message-ID: <200803112204.m2BM4RDt041277@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=137444 Change 137444 by rwatson@rwatson_cinnamon on 2008/03/11 22:03:31 Read the default buffer size from bpf device so that zero-copy tracks net.bpf.bpfsize as a default. Round up to page size. Affected files ... .. //depot/projects/zcopybpf/src/contrib/libpcap/pcap-bpf.c#22 edit Differences ... ==== //depot/projects/zcopybpf/src/contrib/libpcap/pcap-bpf.c#22 (text+ko) ==== @@ -810,7 +810,12 @@ pcap_strerror(errno)); goto bad; } - p->zbufsize = 32768; + if ((ioctl(fd, BIOCGBLEN, (caddr_t)&v) < 0) || v < 32768) + v = 32768; +#ifndef roundup +#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* to any y */ +#endif + p->zbufsize = roundup(v, getpagesize()); if (p->zbufsize > zbufmax) p->zbufsize = zbufmax; p->zbuf1 = mmap(NULL, p->zbufsize, PROT_READ | PROT_WRITE,
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