linux-toradex.git/tools/include/uapi/linux/bpf.h, branch v6.11-rc7

bpf: Add CHECKSUM_COMPLETE to bpf test progs

2024-06-13T12:29:47+00:00

Add special flag to validate that TC BPF program properly updates
checksum information in skb.

Signed-off-by: Vadim Fedorenko 
Signed-off-by: Daniel Borkmann 
Reviewed-by: Jakub Kicinski 
Acked-by: Daniel Borkmann 
Link: https://lore.kernel.org/bpf/20240606145851.229116-1-vadfed@meta.com

net: Add additional bit to support clockid_t timestamp type

2024-05-23T21:14:36+00:00

tstamp_type is now set based on actual clockid_t compressed
into 2 bits.

To make the design scalable for future needs this commit bring in
the change to extend the tstamp_type:1 to tstamp_type:2 to support
other clockid_t timestamp.

We now support CLOCK_TAI as part of tstamp_type as part of this
commit with existing support CLOCK_MONOTONIC and CLOCK_REALTIME.

Signed-off-by: Abhishek Chauhan 
Reviewed-by: Willem de Bruijn 
Reviewed-by: Martin KaFai Lau 
Link: https://lore.kernel.org/r/20240509211834.3235191-3-quic_abchauha@quicinc.com
Signed-off-by: Martin KaFai Lau

bpf: Add support for kprobe session attach

2024-04-30T16:45:53+00:00

Adding support to attach bpf program for entry and return probe
of the same function. This is common use case which at the moment
requires to create two kprobe multi links.

Adding new BPF_TRACE_KPROBE_SESSION attach type that instructs
kernel to attach single link program to both entry and exit probe.

It's possible to control execution of the bpf program on return
probe simply by returning zero or non zero from the entry bpf
program execution to execute or not the bpf program on return
probe respectively.

Signed-off-by: Jiri Olsa 
Signed-off-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20240430112830.1184228-2-jolsa@kernel.org

bpf: add mrtt and srtt as BPF_SOCK_OPS_RTT_CB args

2024-04-25T21:09:05+00:00

Two important arguments in RTT estimation, mrtt and srtt, are passed to
tcp_bpf_rtt(), so that bpf programs get more information about RTT
computation in BPF_SOCK_OPS_RTT_CB.

The difference between bpf_sock_ops->srtt_us and the srtt here is: the
former is an old rtt before update, while srtt passed by tcp_bpf_rtt()
is that after update.

Signed-off-by: Philo Lu 
Link: https://lore.kernel.org/r/20240425161724.73707-2-lulie@linux.alibaba.com
Signed-off-by: Martin KaFai Lau

tools: sync include/uapi/linux/bpf.h

2024-04-24T01:31:24+00:00

cp include/uapi/linux/bpf.h tools/include/uapi/linux/bpf.h

Signed-off-by: Benjamin Tissoires 
Link: https://lore.kernel.org/r/20240420-bpf_wq-v2-6-6c986a5a741f@kernel.org
Signed-off-by: Alexei Starovoitov

bpf: Add bpf_link support for sk_msg and sk_skb progs

2024-04-11T02:52:25+00:00

Add bpf_link support for sk_msg and sk_skb programs. We have an
internal request to support bpf_link for sk_msg programs so user
space can have a uniform handling with bpf_link based libbpf
APIs. Using bpf_link based libbpf API also has a benefit which
makes system robust by decoupling prog life cycle and
attachment life cycle.

Reviewed-by: John Fastabend 
Signed-off-by: Yonghong Song 
Link: https://lore.kernel.org/r/20240410043527.3737160-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov

bpf: Pack struct bpf_fib_lookup

2024-04-04T22:52:32+00:00

The struct bpf_fib_lookup is supposed to be of size 64. A recent commit
59b418c7063d ("bpf: Add a check for struct bpf_fib_lookup size") added
a static assertion to check this property so that future changes to the
structure will not accidentally break this assumption.

As it immediately turned out, on some 32-bit arm systems, when AEABI=n,
the total size of the structure was equal to 68, see [1]. This happened
because the bpf_fib_lookup structure contains a union of two 16-bit
fields:

    union {
            __u16 tot_len;
            __u16 mtu_result;
    };

which was supposed to compile to a 16-bit-aligned 16-bit field. On the
aforementioned setups it was instead both aligned and padded to 32-bits.

Declare this inner union as __attribute__((packed, aligned(2))) such
that it always is of size 2 and is aligned to 16 bits.

  [1] https://lore.kernel.org/all/CA+G9fYtsoP51f-oP_Sp5MOq-Ffv8La2RztNpwvE6+R1VtFiLrw@mail.gmail.com/#t

Reported-by: Naresh Kamboju 
Fixes: e1850ea9bd9e ("bpf: bpf_fib_lookup return MTU value as output when looked up")
Signed-off-by: Anton Protopopov 
Signed-off-by: Andrii Nakryiko 
Reviewed-by: Alexander Lobakin 
Acked-by: Daniel Borkmann 
Link: https://lore.kernel.org/bpf/20240403123303.1452184-1-aspsk@isovalent.com

bpf: Fix typo in uapi doc comments

2024-04-02T14:04:34+00:00

In a few places in the bpf uapi headers, EOPNOTSUPP is missing a "P" in
the doc comments. This adds the missing "P".

Signed-off-by: David Lechner 
Signed-off-by: Daniel Borkmann 
Link: https://lore.kernel.org/bpf/20240329152900.398260-2-dlechner@baylibre.com

bpf: Add support for passing mark with bpf_fib_lookup

2024-03-29T01:30:52+00:00

Extend the bpf_fib_lookup() helper by making it to utilize mark if
the BPF_FIB_LOOKUP_MARK flag is set. In order to pass the mark the
four bytes of struct bpf_fib_lookup are used, shared with the
output-only smac/dmac fields.

Signed-off-by: Anton Protopopov 
Signed-off-by: Daniel Borkmann 
Reviewed-by: David Ahern 
Acked-by: Daniel Borkmann 
Link: https://lore.kernel.org/bpf/20240326101742.17421-2-aspsk@isovalent.com
Signed-off-by: Alexei Starovoitov

bpf: Sync uapi bpf.h to tools directory

2024-03-25T15:36:56+00:00

There is a difference between kernel uapi bpf.h and tools
uapi bpf.h. There is no functionality difference, but let
us sync properly to make it easy for later bpf.h update.

Signed-off-by: Yonghong Song 
Signed-off-by: Daniel Borkmann 
Link: https://lore.kernel.org/bpf/20240325033842.1693553-1-yonghong.song@linux.dev