Alexei Starovoitov d691f9e8d4 bpf: allow programs to write to certain skb fields ... allow programs read/write skb->mark, tc_index fields and ((struct qdisc_skb_cb *)cb)->data. mark and tc_index are generically useful in TC. cb[0]-cb[4] are primarily used to pass arguments from one program to another called via bpf_tail_call() which can be seen in sockex3_kern.c example. All fields of 'struct __sk_buff' are readable to socket and tc_cls_act progs. mark, tc_index are writeable from tc_cls_act only. cb[0]-cb[4] are writeable by both sockets and tc_cls_act. Add verifier tests and improve sample code. Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-06-07 02:01:33 -07:00
..
bpf
hidraw
hw_breakpoint
kdb
kfifo
kobject
kprobes
livepatch
pktgen
rpmsg
seccomp
trace_events
uhid
Kconfig
Makefile