Hello, I'm trying to address the limitation in (upstream) net/vblade that was brought up in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205164 This is related to writes larger than hw.pagesize but smaller than the configured MTU with BPF. I traced this to sys/net/bpf.c where calls to bpfwrite() will use bpf_movein() which in turn uses m_get2() to allocate a single mbuf. This will fail if the requested mbuf size is larger than MJUMPAGESIZE (defined as PAGE_SIZE on x86). I believe this should use m_getm2() and populate multiple mbufs. Code in NetBSD explicitly notes that they omit mbuf chaining, but this is not documentated behaviour in the man page.
Any chance of having this fixed in a supported release, or getting a usable/documented workaround? Thanks. _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
