100644
--- a/src/cc/libbpf.c
+++ b/src/cc/libbpf.c
@@ -408,6 +408,8 @@ int bpf_prog_compute_tag(const struct bpf_insn
*insns, int prog_len,
return -1;
}
*ptag = __builtin_bswap64(u.tag);
+ close(shafd);
+ close(shafd2);
return 0;
}
On 03/14/2018 05:38 AM, Mauricio Vasquez via
Dear All,
One of our applications is giving errors because there are many file
descriptors open. After some debugging we found that bcc appears to be
leaking file descriptors.
Please considerer the following example where a very simple ebpf program
is compiled and then it is loaded and unloa
Hello Teng,
(Adding the list as dropped in last message)
On 02/28/2018 02:37 AM, Teng Qin wrote:
On Tue, Feb 27, 2018 at 12:27 PM, Mauricio Vasquez via iovisor-dev
mailto:iovisor-dev@lists.iovisor.org>>
wrote:
Dear All,
We know from our experience implementing network fun
Dear All,
We know from our experience implementing network functions in eBPF that
some services require to keep pool of elements, for example addresses
and ports in a NAT. So far we haven't found a way to do it entirely in
eBPF, we have implemented some workarounds as described in [1] (use an
:1
```
Please notice that I want to attach to veth1:1. Is that possible?
Thanks,
Mauricio
On 02/06/2018 02:54 PM, Y Song wrote:
On Tue, Feb 6, 2018 at 8:33 AM, Mauricio Vasquez via iovisor-dev
wrote:
Hello All,
I tried to load a PROG_TYPE_SCHED_CLS eBPF program and attach it to a linux
int
Hello All,
I tried to load a PROG_TYPE_SCHED_CLS eBPF program and attach it to a
linux interface, netlink fails because it is not able to find the interface.
Those are the steps I did:
sudo ifconfig veth1:1 192.168.2.210/32 up
`
#!/usr/bin/python
# Copyright (c) PLUMgrid, Inc.
# Licensed u
Dear All,
I have been using libbcc with a C++ application without problems for a
while. However, when I tried this with bcc master I got some linker errors.
Even with a basic example I get the same errors:
test_overflow.cpp:
#include
#include
const std::string BPF_PROGRAM1 = R"(
BPF_TABLE
Dear All,
We are implementing an eBPF program that uses a multi-key map, we create
a structure containing all the fields used as keys.
This approach works good until we perform operations on the map using
all the keys, but for sure we are not able to perform operations on the
map using a sub
Hi William,
On 04/18/2017 06:54 PM, William Tu via iovisor-dev wrote:
Hi,
I found that if the loop variable "int i" is used in the map lookup as below:
#pragma clang loop unroll(full)
for (i = 0; i < 8; ++i) {
struct bpf_flow_keys *mask;
mask = bpf_map_lookup_elem(&flow_mask
On 04/03/2017 12:31 PM, Daniel Borkmann wrote:
On 04/03/2017 03:40 PM, Mauricio Vasquez via iovisor-dev wrote:
Dear All,
I am trying to inject a BPF_PROG_TYPE_SCHED_ACT program and attach it
to the TC using C++.
Out of curiosity, why not .._SCHED_CLS program in direct-action mode
(same
Dear All,
I am trying to inject a BPF_PROG_TYPE_SCHED_ACT program and attach it to
the TC using C++.
I had no particular problems compiling and injecting the program,
however I haven't been able to attach it to TC, I know that in go I can
use the netlink library [1] or in python pyroute2 [2]
On 02/28/2017 06:01 AM, Tanja Ulmen wrote:
Hi Mauricio,
thank you for the example program, it works and I get both outputs.
Are you calling load_func() for the program in the .c file?
Yes I'm calling load_func() for the program. My program is similar to
the endToEndTest.py of the P4 fronten
Hello Deepa,
Is there going to be someway to attend the summit remotely?
Thanks,
Mauricio
On 02/23/2017 02:33 AM, Deepa Kalani via iovisor-dev wrote:
Folks,
Please find the agenda at the link below…
https://docs.google.com/document/d/1tw3BlY0fq9yZYVakcuoXMLW1mL-KeB-zHUJGCUw8qfk/pub
see you
Hello Tanja,
On 02/20/2017 09:53 AM, Tanja Ulmen via iovisor-dev wrote:
Hi,
I'm new to eBPF and bcc and I hope this is the right platform for my
question.
Welcome!
I have the following problem while working with a bpf program array map:
I have a C file that contains a program map like this
Hello,
We are having some issues for handling the address pool of a DHCP server
implemented with eBPF.
We tried to implement it using a map containing all the available
addresses, this map is filled at the beginning and then addresses are
taken (and also released), however we cannot find a w
On 01/11/2017 05:32 PM, Daniel Borkmann wrote:
On 01/11/2017 10:51 PM, Mauricio Vasquez wrote:
Hi Daniel,
On 01/10/2017 04:49 AM, Daniel Borkmann wrote:
On 01/09/2017 04:48 PM, Mauricio Vasquez via iovisor-dev wrote:
Hello,
I am trying to implement an eBPF program that trims an UDP packet
makes sense or not to calculate it in
the DHCP case.
fulvio
On 11/01/2017 22:51, Mauricio Vasquez via iovisor-dev wrote:
Hi Daniel,
On 01/10/2017 04:49 AM, Daniel Borkmann wrote:
On 01/09/2017 04:48 PM, Mauricio Vasquez via iovisor-dev wrote:
Hello,
I am trying to implement an eBPF program
Hi Daniel,
On 01/10/2017 04:49 AM, Daniel Borkmann wrote:
On 01/09/2017 04:48 PM, Mauricio Vasquez via iovisor-dev wrote:
Hello,
I am trying to implement an eBPF program that trims an UDP packet to
a predefined length. I am able to trim the packet (using the
bpf_change_tail helper) and also
Hello,
I am trying to implement an eBPF program that trims an UDP packet to a
predefined length. I am able to trim the packet (using the
bpf_change_tail helper) and also to update the ip->len and udp->length
fields. After changing the those fields I update the checksums using the
bpf_[l3,l4]_
#L13
On 12/13/2016 09:23 PM, Alexei Starovoitov wrote:
when you change the prototype to 'const void *' does it help compiler
to unroll it?
On Tue, Dec 13, 2016 at 12:06 PM, Mauricio Vasquez via iovisor-dev
wrote:
Hello,
We are having some doubts about the use of the const q
Hello Thomas,
On 12/08/2016 09:12 AM, Thomas Graf wrote:
On 7 December 2016 at 22:06, Mauricio Vasquez via iovisor-dev
wrote:
BPF_TABLE("array", u32, struct rt_entry, routing_table, ROUTING_TABLE_DIM);
static int handle_rx(void *skb, struct metadata *md) {
u8 *cursor = 0;
s
Hello,
We are having some doubts about the use of the const qualifier for the
key argument in functions to access eBPF maps, both, from user space and
within eBPF programs.
According to our understanding the key is not modified when used to
access the maps, however we noticed that in the bp
Hello,
We are implementing a basic version of a router. In order to perform the
routing process we implemented a bounded loop that iterates over all
routing table entries looking for a match.
We also used the #pragma directives in order to let clang automatically
unroll the loop, unfortunate
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