Calling delete on an array type map entry does not have an effect.
Instead, the entry needs to be zeroed out, since the array slot always
exists. To avoid unnecessary calls to update(), only call update() when
the map type is array-like. The type was not exposed to python up until
now, so add it.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Add test case for clearing of maps from python

Fixes: #142
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Add BPF python helpers for reading trace_pipe

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

more examples of b[] syntax, fix func arg passing

Add getitem api to BPF object to reference tables

To simplify some common usage patterns, add a getitem api to the BPF
class. This wraps the get_table() api and allows the api user to skip
keeping their own get_table handle.

Fixes: #137
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Change API of attach_kprobe to take a name argument

Per feedback on the attach_kprobe api, change up the arguments to remove
the load_func that typically preceeds the call. Instead, move this
inside the attach_kprobe implementation. Also, this makes attach_kprobe
need to be non-static. The same applies to attach_kretprobe.

Old:
fn = b.load_func("hello", BPF.KPROBE)
BPF.attach_kprobe(fn, "sys_clone")

New:
b.attach_kprobe(event="sys_clone", fn_name="hello")

Note that the kwarg style is not required, but I fixed up the current
usages to provide readability.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

some bcc examples and tools

Add format string argument to bpf-run

Usage:
bpf-run -f "time={3} output={5}"
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Add bpf-run command line tool

Example usage:
sudo bpf-run -p sys_clone -c 'bpf_trace_printk("Hello, World!\n");' -t
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

add dhcp support for tunnel-mesh

Signed-off-by: Yonghong Song <yhs@plumgrid.com>

add vlan_learning and distributed_bridge in libbcc package

distributed_bridge: check ip address before validating traffic

Signed-off-by: Wei-Chun Chao <weichunc@plumgrid.com>

Signed-off-by: Yonghong Song <yhs@plumgrid.com>

distributed_bridge: wait for ns comes up before validating traffic

Sometimes it takes longer for ns to complete configuration.
Signed-off-by: Wei-Chun Chao <weichunc@plumgrid.com>

test_brb2: only account for IP and ARP packets

Changes to support map entry read/write in fuse

Sometimes background noise fails the test
Signed-off-by: Wei-Chun Chao <weichunc@plumgrid.com>

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Expose an individual API of the what is done in table_update, that lets
the caller use the module to parse keys for it.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

clean up potential conflict veth before creating new one in create_ns

Signed-off-by: Yonghong Song <yhs@plumgrid.com>

Signed-off-by: Yonghong Song <yhs@plumgrid.com>

Add printf for key/leaf and fix trace_printk bug