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

There was an issue where the rewrite of bpf_trace_printk combined with
conversion of function argument to ctx->$reg was mangling the text. Fix
up this case and add a test.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

This extends upon the sscanf reader functionality, with the intent of
providing key/leaf pretty printing
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Fix recursive loop in parsing pointer to self struct

Issue occurs in the description visitor class, when the struct used in a
map key is a pointer to self, as in:

struct node;
struct node {
  struct node *next;
};

Avoid this in the desc by using "unsigned long long" for all pointers.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

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

Fixing more ctrl-c problem

add connectivity validation in distributed bridge examples

Add one line desc output for simple_tc

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

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

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

  o Also suggest task_switch.py to try with libbcc package
Signed-off-by: Yonghong Song <yhs@plumgrid.com>

Patch series: reorganize bpf_module and add sscanf feature for fuse

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

This is the culmination of the previous patches. It adds an api that can
input map data in a string format, but validating the numbers and
locations of data fields. The use case is for fuse file input/output. A
printf api may follow.

Take the table with key/leaf of:
  struct Key { int a; int b; };
  struct Leaf { int a; int b; int c; struct SubLeaf { int x; int y; } s; };

One would input to this table using:
  update_table(table_name, "{1 2}", "{1 2 -3 {9 0xa}}");

The implementation uses a JITed function for each unique type, that is
invoked to run sscanf on behalf of the caller. The input must have the
exact right number of arguments. Bit fields are supported, but the
caller must be aware of the collapse of those bitfields into an aligned
field, as well as endianness.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

It was bothering me that a whole bunch of accesses to the tables were
based on a string hash lookup, in addition to the vectors that were kept
to convert ids to names. Switch those around, as well as the api
internally.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

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