uot;)
Signed-off-by: Samuel Mendoza-Jonas
Reviewed-by: Frank van der Linden
Reviewed-by: Ethan Chen
Just to be clear, the patch is for 4.14 stable branch.
Acked-by: Yonghong Song
M although I see some tools Makefile directly added
".DELETE_ON_ERROR:" in their Makefile.
Acked-by: Yonghong Song
On 4/15/21 11:18 AM, Steven Rostedt wrote:
On Thu, 15 Apr 2021 19:39:45 +0200
Jiri Olsa wrote:
I don't know how the BPF code does it, but if you are tracing the exit
of a function, I'm assuming that you hijack the return pointer and replace
it with a call to a trampoline that has access to
On 4/9/21 2:20 PM, Sergei Trofimovich wrote:
On Tue, 23 Feb 2021 18:53:21 +
Sergei Trofimovich wrote:
The crash seems to be related to sock_filter-v test from strace:
https://github.com/strace/strace/blob/master/tests/seccomp-filter-v.c
Here is an OOps:
[ 818.089904] BUG: Bad pa
On 4/1/21 3:05 PM, Yonghong Song wrote:
On 4/1/21 4:29 AM, syzbot wrote:
Hello,
syzbot found the following issue on:
HEAD commit: 36e79851 libbpf: Preserve empty DATASEC BTFs during
static..
git tree: bpf-next
console output:
https://syzkaller.appspot.com/x/log.txt?x
On 4/1/21 4:29 AM, syzbot wrote:
Hello,
syzbot found the following issue on:
HEAD commit:36e79851 libbpf: Preserve empty DATASEC BTFs during static..
git tree: bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1569bb06d0
kernel config: https://syzkaller.appspo
support")
Signed-off-by: Andrii Nakryiko
Ack with a nit below.
Acked-by: Yonghong Song
---
tools/lib/bpf/linker.c | 12 +++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/tools/lib/bpf/linker.c b/tools/lib/bpf/linker.c
index 5e0aa2f2c0ca..2c43943da30c 100644
--- a
On 3/19/21 12:21 AM, Daniel Borkmann wrote:
On 3/19/21 3:11 AM, Piotr Krysiuk wrote:
Hi Daniel,
On Fri, Mar 19, 2021 at 12:16 AM Stephen Rothwell
wrote:
diff --cc kernel/bpf/verifier.c
index 44e4ec1640f1,f9096b049cd6..
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@
On 3/15/21 6:29 AM, Pedro Tammela wrote:
This seems to be a reminiscent from the hashmap tests.
Signed-off-by: Pedro Tammela
Acked-by: Yonghong Song
On 3/9/21 10:21 AM, Roman Gushchin wrote:
On Mon, Mar 08, 2021 at 09:44:08PM -0800, Yonghong Song wrote:
On 3/5/21 1:10 PM, Yonghong Song wrote:
On 3/5/21 12:38 PM, Roman Gushchin wrote:
On Thu, Mar 04, 2021 at 08:03:33PM +0100, Jiri Olsa wrote:
hi,
I'm getting attached BUG/crash
On 3/5/21 1:10 PM, Yonghong Song wrote:
On 3/5/21 12:38 PM, Roman Gushchin wrote:
On Thu, Mar 04, 2021 at 08:03:33PM +0100, Jiri Olsa wrote:
hi,
I'm getting attached BUG/crash when running in parralel selftests, like:
while :; do ./test_progs -t spinlock; done
while
ed, struct scatterlist **sgs,
^
1 warning generated.
Fixes: 86a35af628e5 ("selftests/bpf: Add a verifier scale test with unknown bounded
loop")
Signed-off-by: Andrii Nakryiko
Oh, my bad. Thanks for fixing it!
Acked-by: Yonghong Song
On 3/5/21 12:38 PM, Roman Gushchin wrote:
On Thu, Mar 04, 2021 at 08:03:33PM +0100, Jiri Olsa wrote:
hi,
I'm getting attached BUG/crash when running in parralel selftests, like:
while :; do ./test_progs -t spinlock; done
while :; do ./test_progs ; done
it's the latest bpf-next/master,
On 3/4/21 11:03 AM, Jiri Olsa wrote:
hi,
I'm getting attached BUG/crash when running in parralel selftests, like:
while :; do ./test_progs -t spinlock; done
while :; do ./test_progs ; done
it's the latest bpf-next/master, I can send the .config if needed,
but I don't think there's anyt
On 3/3/21 10:02 AM, Cong Wang wrote:
On Tue, Mar 2, 2021 at 10:37 PM Yonghong Song wrote:
On 3/1/21 6:37 PM, Cong Wang wrote:
From: Cong Wang
Now UDP supports sockmap and redirection, we can safely update
the sock type checks for it accordingly.
Cc: John Fastabend
Cc: Daniel
On 3/2/21 11:52 PM, Jiapeng Chong wrote:
Fix the following coccicheck warnings:
./tools/testing/selftests/bpf/test_sockmap.c:735:35-37: WARNING !A || A
&& B is equivalent to !A || B.
Reported-by: Abaci Robot
Signed-off-by: Jiapeng Chong
Acked-by: Yonghong Song
On 3/2/21 11:20 PM, Jiapeng Chong wrote:
Fix the following coccicheck warnings:
./tools/bpf/bpf_dbg.c:1201:55-57: WARNING !A || A && B is equivalent to
!A || B.
Reported-by: Abaci Robot
Signed-off-by: Jiapeng Chong
Acked-by: Yonghong Song
On 3/1/21 6:37 PM, Cong Wang wrote:
From: Cong Wang
Now UDP supports sockmap and redirection, we can safely update
the sock type checks for it accordingly.
Cc: John Fastabend
Cc: Daniel Borkmann
Cc: Jakub Sitnicki
Cc: Lorenz Bauer
Signed-off-by: Cong Wang
---
net/core/sock_map.c | 5
On 3/1/21 6:37 PM, Cong Wang wrote:
From: Cong Wang
Some even simple commit message here will be preferred
compared to empty commit message.
Cc: John Fastabend
Cc: Daniel Borkmann
Cc: Jakub Sitnicki
Cc: Lorenz Bauer
Signed-off-by: Cong Wang
---
include/net/udp.h | 2 ++
net/ipv
allow to provide pre-generated vmlinux.h for runqslower build.
Cc: Martin Lau
Signed-off-by: Andrii Nakryiko
Acked-by: Yonghong Song
On 3/2/21 3:14 AM, Jiri Olsa wrote:
On Mon, Mar 01, 2021 at 04:34:24PM -0800, Andrii Nakryiko wrote:
On Mon, Mar 1, 2021 at 11:11 AM Jiri Olsa wrote:
When testing uprobes we the test gets GEP (Global Entry Point)
address from kallsyms, but then the function is called locally
so the uprobe
On 3/1/21 11:04 AM, Jiri Olsa wrote:
When testing uprobes we the test gets GEP (Global Entry Point)
address from kallsyms, but then the function is called locally
so the uprobe is not triggered.
Fixing this by adjusting the address to LEP (Local Entry Point)
for powerpc arch.
Signed-off-by:
On 2/23/21 2:28 PM, Song Liu wrote:
To access per-task data, BPF programs usually creates a hash table with
pid as the key. This is not ideal because:
1. The user need to estimate the proper size of the hash table, which may
be inaccurate;
2. Big hash tables are slow;
3. To clean up
On 2/9/21 7:00 PM, Alexei Starovoitov wrote:
On 2/9/21 2:08 PM, Song Liu wrote:
On Feb 9, 2021, at 1:30 PM, Alexei Starovoitov
wrote:
On Mon, Feb 08, 2021 at 02:52:52PM -0800, Song Liu wrote:
Introduce task_vma bpf_iter to print memory information of a
process. It
can be used to print
On 2/8/21 11:35 PM, Dmitry Vyukov wrote:
On Sun, Feb 7, 2021 at 1:20 PM syzbot
wrote:
Hello,
syzbot found the following issue on:
HEAD commit:73d62e81 kmsan: random: prevent boot-time reports in _mix_..
git tree: https://github.com/google/kmsan.git master
console output: https:/
On 2/8/21 2:52 PM, Song Liu wrote:
The test dumps information similar to /proc/pid/maps. The first line of
the output is compared against the /proc file to make sure they match.
Signed-off-by: Song Liu
Acked-by: Yonghong Song
ilar to the one
used in show_smaps_rollup().
Signed-off-by: Song Liu
Acked-by: Yonghong Song
On 2/4/21 12:50 PM, Song Liu wrote:
The test dumps information similar to /proc/pid/maps. The first line of
the output is compared against the /proc file to make sure they match.
Signed-off-by: Song Liu
---
.../selftests/bpf/prog_tests/bpf_iter.c | 114 --
tools/test
On 2/4/21 12:49 PM, Song Liu wrote:
Introduce task_vma bpf_iter to print memory information of a process. It
can be used to print customized information similar to /proc//maps.
Current /proc//maps and /proc//smaps provide information of
vma's of a process. However, these information are not f
On 1/28/21 9:57 PM, Cong Wang wrote:
On Thu, Jan 28, 2021 at 6:54 PM Alexei Starovoitov
wrote:
I meant it would look like:
noinline per_elem_callback(map, key, value, ...)
{
if (value->foo > ...)
bpf_delete_map_elem(map, key);
}
noinline timer_callback(timer, ctx)
{
map = ctx->
:293: bpfdep] Error 1
make[2]: *** [Makefile:156: all] Error 2
With #ifndef __SANE_USERSPACE_TYPES__ in tools/include/linux/types.h,
the above error has gone and this ifndef change does not hurt other
compilations.
Signed-off-by: Tiezhu Yang
Acked-by: Yonghong Song
issue to:
commit 8b401f9ed2441ad9e219953927a842d24ed051fc
Author: Yonghong Song
Date: Thu May 23 21:47:45 2019 +
bpf: implement bpf_send_signal() helper
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=123408e750
start commit: 7d68e382 bpf: Permit size-0 datasec
git
itionally, as Fangrui said, the dir llvm-project/llvm/build/install is
not used, BUILD_SHARED_LIBS=OFF is the default option [2], so also change
Documentation/bpf/bpf_devel_QA.rst together.
[1] https://clang.llvm.org/get_started.html
[2] https://www.llvm.org/docs/CMake.html
Signed-off-by: Tiezhu Y
ep consistent.
I verified the procedure and it is proved to be feasible, so we should
update README.rst to reflect the reality. At the same time, update the
related comment in Makefile.
[1]
https://clang.llvm.org/get_started.html
Signed-off-by: Tiezhu Yang
Acked-by: Yonghong Song
---
v2
On 1/19/21 4:22 AM, Qais Yousef wrote:
Reuse module_attach infrastructure to add a new bare tracepoint to check
we can attach to it as a raw tracepoint.
Signed-off-by: Qais Yousef
Acked-by: Yonghong Song
ate the
related comment in Makefile.
[1] https://clang.llvm.org/get_started.html
Signed-off-by: Tiezhu Yang
Ack with minor nits in the above. Also, this is a documentation update.
I think it is okay to target the patch to bpf-next instead of bpf.
Acked-by: Yonghong Song
On 1/17/21 7:22 PM, Tiezhu Yang wrote:
On 01/14/2021 01:12 AM, Yonghong Song wrote:
On 1/13/21 2:57 AM, Tiezhu Yang wrote:
MIPS needs __SANE_USERSPACE_TYPES__ before to select
'int-ll64.h' in arch/mips/include/uapi/asm/types.h and avoid compile
warnings when printing __u64
On 1/18/21 12:53 AM, Tiezhu Yang wrote:
In the current samples/bpf/README.rst, the url of llvm and clang git
may be out of date, they are unable to access:
$ git clone http://llvm.org/git/llvm.git
Cloning into 'llvm'...
fatal: unable to access 'http://llvm.org/git/llvm.git/ ': Maximum (20)
r
On 1/18/21 4:18 AM, Qais Yousef wrote:
On 01/16/21 18:11, Yonghong Song wrote:
On 1/16/21 10:21 AM, Qais Yousef wrote:
Reuse module_attach infrastructure to add a new bare tracepoint to check
we can attach to it as a raw tracepoint.
Signed-off-by: Qais Yousef
---
.../bpf/bpf_testmod
On 1/16/21 10:21 AM, Qais Yousef wrote:
Reuse module_attach infrastructure to add a new bare tracepoint to check
we can attach to it as a raw tracepoint.
Signed-off-by: Qais Yousef
---
.../bpf/bpf_testmod/bpf_testmod-events.h | 6 +
.../selftests/bpf/bpf_testmod/bpf_testmod.c
ithout worrying about any ABI.
Update Documentation/bpf/bpf_design_QA.rst to document this contract.
Signed-off-by: Qais Yousef
Acked-by: Yonghong Song
On 1/15/21 5:12 PM, Song Liu wrote:
On Jan 15, 2021, at 4:55 PM, Yonghong Song wrote:
On 1/15/21 3:34 PM, Song Liu wrote:
On Jan 12, 2021, at 8:53 AM, KP Singh wrote:
On Tue, Jan 12, 2021 at 5:32 PM Yonghong Song wrote:
On 1/11/21 3:45 PM, Song Liu wrote:
On Jan 11, 2021
On 1/15/21 3:34 PM, Song Liu wrote:
On Jan 12, 2021, at 8:53 AM, KP Singh wrote:
On Tue, Jan 12, 2021 at 5:32 PM Yonghong Song wrote:
On 1/11/21 3:45 PM, Song Liu wrote:
On Jan 11, 2021, at 1:58 PM, Martin Lau wrote:
On Mon, Jan 11, 2021 at 10:35:43PM +0100, KP Singh wrote
On 1/15/21 8:39 AM, Stanislav Fomichev wrote:
On Thu, Jan 14, 2021 at 8:27 PM Yonghong Song wrote:
On 1/14/21 7:59 PM, Alexei Starovoitov wrote:
On Thu, Jan 14, 2021 at 7:51 PM Stanislav Fomichev wrote:
lock_sock(sock->sk);
err = __inet_stream_connect(sock, ua
Acked-by: Yonghong Song
On 1/14/21 7:59 PM, Alexei Starovoitov wrote:
On Thu, Jan 14, 2021 at 7:51 PM Stanislav Fomichev wrote:
lock_sock(sock->sk);
err = __inet_stream_connect(sock, uaddr, addr_len, flags, 0);
Similarly here, attaching fexit to __inet_stream_connect would execute
your BPF prog
On 1/14/21 6:27 AM, Hangbin Liu wrote:
This patch add a xdp program on egress to show that we can modify
the packet on egress. In this sample we will set the pkt's src
mac to egress's mac address. The xdp_prog will be attached when
-X option supplied.
Signed-off-by: Hangbin Liu
---
v6: no c
On 1/14/21 6:52 AM, Jesper Dangaard Brouer wrote:
On Tue, 12 Jan 2021 11:23:33 -0800
Andrii Nakryiko wrote:
On Tue, Jan 12, 2021 at 9:49 AM Jesper Dangaard Brouer
wrote:
This BPF-helper bpf_check_mtu() works for both XDP and TC-BPF programs.
The SKB object is complex and the skb->len va
On 1/13/21 2:36 PM, Ian Rogers wrote:
No additional warnings are generated by enabling this, but having it
enabled will help avoid regressions.
Signed-off-by: Ian Rogers
Acked-by: Yonghong Song
On 1/13/21 2:36 PM, Ian Rogers wrote:
Add inline to __always_inline making it match the linux/compiler.h.
Adding this avoids an unused function warning on bpf_tail_call_static
when compining with -Wall.
Signed-off-by: Ian Rogers
Acked-by: Yonghong Song
On 1/13/21 1:48 PM, Song Liu wrote:
On Jan 12, 2021, at 9:17 PM, Yonghong Song wrote:
On 1/12/21 3:42 PM, Song Liu wrote:
syzbot reported a WARNING for allocating too big memory:
WARNING: CPU: 1 PID: 8484 at mm/page_alloc.c:4976
__alloc_pages_nodemask+0x5f8/0x730 mm/page_alloc.c:5011
On 1/13/21 2:57 AM, Tiezhu Yang wrote:
There exists many build errors and warnings when make M=samples/bpf,
both fixes in this patch related to mips, please do mention in the
commit message that this is
mips related. x86 (and arm64 I assume) compiles just fine.
this patch series fix some
On 1/13/21 2:57 AM, Tiezhu Yang wrote:
When make M=samples/bpf on the Loongson 3A3000 platform which
belongs to MIPS arch, there exists many similar build errors
about 'asm/rwonce.h' file not found, so include it only under
CONFIG_ARM64 and CONFIG_ALPHA due to it exists only in arm64
and alpha
On 1/13/21 2:57 AM, Tiezhu Yang wrote:
MIPS needs __SANE_USERSPACE_TYPES__ before to select
'int-ll64.h' in arch/mips/include/uapi/asm/types.h and avoid compile
warnings when printing __u64 with %llu, %llx or %lld.
could you mention which command produces the following warning?
prin
On 1/13/21 2:16 AM, Qais Yousef wrote:
On 01/12/21 12:19, Yonghong Song wrote:
I applied the patch to my local bpf-next repo, and got the following
compilation error:
[...]
I dumped preprecessor result but after macro expansion, the code
becomes really complex and I have not figured out
area pointed by it.
The patch was partially contributed by CyberArk Software, Inc.
Signed-off-by: Gilad Reti
I didn't verify result_unpriv = ACCEPT part. I think it is correct
by checking code.
Acked-by: Yonghong Song
ported-by: syzbot+4f98876664c7337a4...@syzkaller.appspotmail.com
Fixes: 1b4d60ec162f ("bpf: Enable BPF_PROG_TEST_RUN for raw_tracepoint")
Cc: sta...@vger.kernel.org # v5.10+
Signed-off-by: Song Liu
Maybe this should target to bpf tree?
Acked-by: Yonghong Song
On 1/11/21 10:20 AM, Qais Yousef wrote:
Some subsystems only have bare tracepoints (a tracepoint with no
associated trace event) to avoid the problem of trace events being an
ABI that can't be changed.
From bpf presepective, bare tracepoints are what it calls
RAW_TRACEPOINT().
Since bpf ass
On 1/6/21 8:17 PM, Song Liu wrote:
Introduce task_vma bpf_iter to print memory information of a process. It
can be used to print customized information similar to /proc//maps.
Current /proc//maps and /proc//smaps provide information of
vma's of a process. However, these information are not fl
On 1/12/21 7:43 AM, Daniel Borkmann wrote:
On 1/12/21 4:35 PM, Gilad Reti wrote:
On Tue, Jan 12, 2021 at 4:56 PM KP Singh wrote:
On Tue, Jan 12, 2021 at 10:16 AM Gilad Reti
wrote:
Add test to check that the verifier is able to recognize spilling of
PTR_TO_MEM registers.
It would be nic
On 1/11/21 3:45 PM, Song Liu wrote:
On Jan 11, 2021, at 1:58 PM, Martin Lau wrote:
On Mon, Jan 11, 2021 at 10:35:43PM +0100, KP Singh wrote:
On Mon, Jan 11, 2021 at 7:57 PM Martin KaFai Lau wrote:
On Fri, Jan 08, 2021 at 03:19:47PM -0800, Song Liu wrote:
[ ... ]
diff --git a/kernel
On 1/11/21 11:14 PM, Andrii Nakryiko wrote:
On Mon, Jan 11, 2021 at 7:24 PM Yonghong Song wrote:
On 1/11/21 2:54 PM, Song Liu wrote:
On Jan 11, 2021, at 9:49 AM, Yonghong Song wrote:
On 1/8/21 3:19 PM, Song Liu wrote:
Replace hashtab with task local storage in runqslower. This
On 1/11/21 2:54 PM, Song Liu wrote:
On Jan 11, 2021, at 9:49 AM, Yonghong Song wrote:
On 1/8/21 3:19 PM, Song Liu wrote:
Replace hashtab with task local storage in runqslower. This improves the
performance of these BPF programs. The following table summarizes average
runtime of these
On 1/11/21 1:37 PM, Andrii Nakryiko wrote:
On Sun, Jan 10, 2021 at 8:15 PM Yonghong Song wrote:
On 1/8/21 2:09 PM, Andrii Nakryiko wrote:
Add support for searching for ksym externs not just in vmlinux BTF, but across
all module BTFs, similarly to how it's done for CO-RE reloca
On 1/11/21 1:29 PM, Andrii Nakryiko wrote:
On Sun, Jan 10, 2021 at 8:13 PM Yonghong Song wrote:
On 1/8/21 2:09 PM, Andrii Nakryiko wrote:
Add support for directly accessing kernel module variables from BPF programs
using special ldimm64 instructions. This functionality builds upon
On 1/11/21 12:51 PM, Andrii Nakryiko wrote:
On Mon, Jan 11, 2021 at 10:13 AM Yonghong Song wrote:
On 1/9/21 11:03 PM, Andrii Nakryiko wrote:
Empty BTFs do come up (e.g., simple kernel modules with no new types and
strings, compared to the vmlinux BTF) and there is nothing technically
On 1/11/21 8:17 AM, Daniel Borkmann wrote:
Extend existing cgroup bind4/bind6 tests to add coverage for setting and
retrieving SO_MARK, SO_PRIORITY and SO_BINDTOIFINDEX at the bind hook.
Signed-off-by: Daniel Borkmann
Ack with a minor comments below.
Acked-by: Yonghong Song
: Yonghong Song
On 1/9/21 11:03 PM, Andrii Nakryiko wrote:
Empty BTFs do come up (e.g., simple kernel modules with no new types and
strings, compared to the vmlinux BTF) and there is nothing technically wrong
with them. So remove unnecessary check preventing loading empty BTFs.
Reported-by: Christopher Willi
owing module BTFs with no types or strings.
Reported-by: Christopher William Snowhill
Fixes: 36e68442d1af ("bpf: Load and verify kernel module BTFs")
Signed-off-by: Andrii Nakryiko
Acked-by: Yonghong Song
On 1/8/21 3:19 PM, Song Liu wrote:
Replace hashtab with task local storage in runqslower. This improves the
performance of these BPF programs. The following table summarizes average
runtime of these programs, in nanoseconds:
task-local hash-prealloc hash-no-prea
On 1/8/21 3:19 PM, Song Liu wrote:
Update the Makefile to prefer using ../../../vmlinux, which has latest
definitions for vmlinux.h
Signed-off-by: Song Liu
---
tools/bpf/runqslower/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/bpf/runqslower/Makefile
On 1/8/21 3:19 PM, Song Liu wrote:
Task local storage is enabled for tracing programs. Add a test for it
without CONFIG_BPF_LSM.
Signed-off-by: Song Liu
---
.../bpf/prog_tests/test_task_local_storage.c | 34 +
.../selftests/bpf/progs/task_local_storage.c | 37 +++
On 1/8/21 3:19 PM, Song Liu wrote:
To access per-task data, BPF program typically creates a hash table with
pid as the key. This is not ideal because:
1. The use need to estimate requires size of the hash table, with may be
inaccurate;
2. Big hash tables are slow;
3. To clean up the
On 1/11/21 2:17 AM, KP Singh wrote:
On Mon, Jan 11, 2021 at 7:27 AM Yonghong Song wrote:
On 1/8/21 3:19 PM, Song Liu wrote:
To access per-task data, BPF program typically creates a hash table with
pid as the key. This is not ideal because:
1. The use need to estimate requires size of
On 1/11/21 12:17 AM, Tiezhu Yang wrote:
Hi all,
I found the following build errors and warnings when make M=samples/bpf
on the Loongson 3A3000 platform which belongs to MIPS arch.
Are theseknown issues? Should I submit patches to fix them? (1) fatal
error: 'asm/rwonce.h' file not found
Th
On 1/8/21 3:19 PM, Song Liu wrote:
To access per-task data, BPF program typically creates a hash table with
pid as the key. This is not ideal because:
1. The use need to estimate requires size of the hash table, with may be
inaccurate;
2. Big hash tables are slow;
3. To clean up the
On 1/8/21 2:09 PM, Andrii Nakryiko wrote:
Add per-CPU variable to bpf_testmod.ko and use those from new selftest to
validate it works end-to-end.
Signed-off-by: Andrii Nakryiko
Ack with a nit below.
Acked-by: Yonghong Song
---
.../selftests/bpf/bpf_testmod/bpf_testmod.c | 3
On 1/8/21 2:09 PM, Andrii Nakryiko wrote:
Add support for searching for ksym externs not just in vmlinux BTF, but across
all module BTFs, similarly to how it's done for CO-RE relocations. Kernels
that expose module BTFs through sysfs are assumed to support new ldimm64
instruction extension wit
rch for DATASEC record needs to look at only module's added BTF
types. This is implemented with custom search function.
Signed-off-by: Andrii Nakryiko
Ack with a minor nit below.
Acked-by: Yonghong Song
---
include/linux/bpf.h | 10 +++
include/linux/bpf_verifier.h | 3 +
nload bpf_testmod.
Fixes: 9f7fa225894c ("selftests/bpf: Add bpf_testmod kernel module for testing")
Suggested-by: Alexei Starovoitov
Signed-off-by: Andrii Nakryiko
Acked-by: Yonghong Song
t;bpf: Fix missing prog untrack in release_maps")
Signed-off-by: Andrii Nakryiko
Acked-by: Yonghong Song
Fixes: 1ea47e01ad6e ("bpf: add support for bpf_call to interpreter")
Signed-off-by: Andrii Nakryiko
Acked-by: Yonghong Song
: add support for bpf_call to interpreter")
Signed-off-by: Andrii Nakryiko
Acked-by: Yonghong Song
x27;t work with CO-RE).
Signed-off-by: Andrii Nakryiko
Acked-by: Yonghong Song
_ExtInt extension enabled in clang, which is under
review.
Link: https://clang.llvm.org/docs/LanguageExtensions.html#extended-integer-types
Link: https://reviews.llvm.org/D93103
Signed-off-by: Sean Young
---
changes since v2:
- added tests as suggested by Yonghong Song
- added kernel pretty-printer
On 12/23/20 11:01 PM, YANG LI wrote:
Assigning local variable txq to the outputting parameter xdp->txq is not
safe, txq will be released after the end of the function call.
Then the result of using xdp is unpredictable.
Fix this error by defining the struct xdp_txq_info in function
dev_map_ru
On 12/18/20 10:06 AM, Jonathan Lemon wrote:
On Fri, Dec 18, 2020 at 08:53:22AM -0800, Yonghong Song wrote:
On 12/11/20 9:11 AM, Jonathan Lemon wrote:
From: Jonathan Lemon
On some systems, some variant of the following splat is
repeatedly seen. The common factor in all traces seems
to
On 12/11/20 9:11 AM, Jonathan Lemon wrote:
From: Jonathan Lemon
On some systems, some variant of the following splat is
repeatedly seen. The common factor in all traces seems
to be the entry point to task_file_seq_next(). With the
patch, all warnings go away.
rcu: INFO: rcu_sched sel
On 12/17/20 9:23 PM, Alexei Starovoitov wrote:
On Thu, Dec 17, 2020 at 8:33 PM Song Liu wrote:
ahh. I missed that. Makes sense.
vm_file needs to be accurate, but vm_area_struct should be accessed as
ptr_to_btf_id.
Passing pointer of vm_area_struct into BPF will be tricky. For example, sh
On 12/17/20 6:34 PM, Alexei Starovoitov wrote:
On Thu, Dec 17, 2020 at 10:08:31PM +, Song Liu wrote:
On Dec 17, 2020, at 11:03 AM, Alexei Starovoitov
wrote:
On Tue, Dec 15, 2020 at 03:36:59PM -0800, Song Liu wrote:
+/*
+ * Key information from vm_area_struct. We need this because w
On 12/17/20 7:01 AM, Sean Young wrote:
clang supports arbitrary length ints using the _ExtInt extension. This
can be useful to hold very large values, e.g. 256 bit or 512 bit types.
Larger types (e.g. 1024 bits) are possible but I am unaware of a use
case for these.
This requires the _ExtInt
On 12/16/20 9:35 AM, Song Liu wrote:
On Dec 16, 2020, at 9:00 AM, Yonghong Song wrote:
On 12/15/20 3:36 PM, Song Liu wrote:
This set introduces bpf_iter for task_vma, which can be used to generate
information similar to /proc/pid/maps or /proc/pid/smaps. Patch 4/4 adds
I did not see
On 12/15/20 3:37 PM, Song Liu wrote:
The test dumps information similar to /proc/pid/maps. The first line of
the output is compared against the /proc file to make sure they match.
Signed-off-by: Song Liu
---
.../selftests/bpf/prog_tests/bpf_iter.c | 106 --
tools/tes
On 12/15/20 3:37 PM, Song Liu wrote:
Sleepable iterator program have access to helper functions like bpf_d_path.
Signed-off-by: Song Liu
Acked-by: Yonghong Song
ble bpf_iter
programs: sleepable programs have access to bpf_d_path; non-sleepable
programs have access to bpf_spin_lock.
Signed-off-by: Song Liu
Agreed. So far bpf_iter programs all called from process context.
Acked-by: Yonghong Song
On 12/15/20 3:36 PM, Song Liu wrote:
Introduce task_vma bpf_iter to print memory information of a process. It
can be used to print customized information similar to /proc//maps.
task_vma iterator releases mmap_lock before calling the BPF program.
Therefore, we cannot pass vm_area_struct direc
used by a lot of people.
an example that mimics /proc/pid/maps.
Changes v1 => v2:
1. Small fixes in task_iter.c and the selftests. (Yonghong)
Song Liu (4):
bpf: introduce task_vma bpf_iter
bpf: allow bpf_d_path in sleepable bpf_iter program
libbpf: introduce section "iter
On 12/11/20 6:48 PM, Song Liu wrote:
The test dumps information similar to /proc/pid/maps. The first line of
the output is compared against the /proc file to make sure they match.
Signed-off-by: Song Liu
---
.../selftests/bpf/prog_tests/bpf_iter.c | 106 --
tools/tes
On 12/11/20 6:48 PM, Song Liu wrote:
Introduce task_vma bpf_iter to print memory information of a process. It
can be used to print customized information similar to /proc//maps.
task_vma iterator releases mmap_lock before calling the BPF program.
Therefore, we cannot pass vm_area_struct direc
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