JIRA: https://issues.redhat.com/browse/RHEL-23649
commit b0dc037399b19a777d569dbd9e2e9bbd62f3b3b1
Author: Jiri Olsa <jolsa@kernel.org>
Date: Fri Jan 19 12:05:05 2024 +0100
bpftool: Display cookie for kprobe multi link
Displaying cookies for kprobe multi link, in plain mode:
# bpftool link
...
1397: kprobe_multi prog 47532
kretprobe.multi func_cnt 3
addr cookie func [module]
ffffffff82b370c0 3 bpf_fentry_test1
ffffffff82b39780 1 bpf_fentry_test2
ffffffff82b397a0 2 bpf_fentry_test3
And in json mode:
# bpftool link -j | jq
...
{
"id": 1397,
"type": "kprobe_multi",
"prog_id": 47532,
"retprobe": true,
"func_cnt": 3,
"missed": 0,
"funcs": [
{
"addr": 18446744071607382208,
"func": "bpf_fentry_test1",
"module": null,
"cookie": 3
},
{
"addr": 18446744071607392128,
"func": "bpf_fentry_test2",
"module": null,
"cookie": 1
},
{
"addr": 18446744071607392160,
"func": "bpf_fentry_test3",
"module": null,
"cookie": 2
}
]
}
Cookie is attached to specific address, and because we sort addresses
before printing, we need to sort cookies the same way, hence adding
the struct addr_cookie to keep and sort them together.
Also adding missing dd.sym_count check to show_kprobe_multi_json.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240119110505.400573-9-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-23644
commit 2adb2e0fcdf3c6d8e28a5a9c33e458e1037ae5ad
Author: Jiri Olsa <jolsa@kernel.org>
Date: Fri Jan 19 12:05:00 2024 +0100
bpftool: Fix wrong free call in do_show_link
The error path frees wrong array, it should be ref_ctr_offsets.
Acked-by: Yafang Shao <laoar.shao@gmail.com>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Fixes: a7795698f8b6 ("bpftool: Add support to display uprobe_multi links")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240119110505.400573-4-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Viktor Malik <vmalik@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-23643
Upstream Status: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
commit 92a85e18ad4705c66ace55a19f4f8301ef0eb59f
Author: Daniel Borkmann <daniel@iogearbox.net>
Date: Tue Oct 24 23:49:01 2023 +0200
bpftool: Implement link show support for netkit
Add support to dump netkit link information to bpftool in similar way as
we have for XDP. The netkit link info only exposes the ifindex and the
attach_type.
Below shows an example link dump output, and a cgroup link is included for
comparison, too:
# bpftool link
[...]
10: cgroup prog 2466
cgroup_id 1 attach_type cgroup_inet6_post_bind
[...]
8: netkit prog 35
ifindex nk1(18) attach_type netkit_primary
[...]
Equivalent json output:
# bpftool link --json
[...]
{
"id": 10,
"type": "cgroup",
"prog_id": 2466,
"cgroup_id": 1,
"attach_type": "cgroup_inet6_post_bind"
},
[...]
{
"id": 12,
"type": "netkit",
"prog_id": 61,
"devname": "nk1",
"ifindex": 21,
"attach_type": "netkit_primary"
}
[...]
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20231024214904.29825-5-daniel@iogearbox.net
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Artem Savkov <asavkov@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-23643
Upstream Status: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
commit 053bbf9bff58864be880d7e9a5af586793dbb7de
Author: Daniel Borkmann <daniel@iogearbox.net>
Date: Wed Aug 16 11:56:51 2023 +0200
bpftool: Implement link show support for xdp
Add support to dump XDP link information to bpftool. This reuses the
recently added show_link_ifindex_{plain,json}(). The XDP link info only
exposes the ifindex.
Below shows an example link dump output, and a cgroup link is included
for comparison, too:
# bpftool link
[...]
10: cgroup prog 2466
cgroup_id 1 attach_type cgroup_inet6_post_bind
[...]
16: xdp prog 2477
ifindex enp5s0(3)
[...]
Equivalent json output:
# bpftool link --json
[...]
{
"id": 10,
"type": "cgroup",
"prog_id": 2466,
"cgroup_id": 1,
"attach_type": "cgroup_inet6_post_bind"
},
[...]
{
"id": 16,
"type": "xdp",
"prog_id": 2477,
"devname": "enp5s0",
"ifindex": 3
}
[...]
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/r/20230816095651.10014-2-daniel@iogearbox.net
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Artem Savkov <asavkov@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-23643
Upstream Status: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
commit e16e6c6df475b10b1ed933a6827798312612358f
Author: Daniel Borkmann <daniel@iogearbox.net>
Date: Wed Aug 16 11:56:50 2023 +0200
bpftool: Implement link show support for tcx
Add support to dump tcx link information to bpftool. This adds a
common helper show_link_ifindex_{plain,json}() which can be reused
also for other link types. The plain text and json device output is
the same format as in bpftool net dump.
Below shows an example link dump output along with a cgroup link
for comparison:
# bpftool link
[...]
10: cgroup prog 1977
cgroup_id 1 attach_type cgroup_inet6_post_bind
[...]
13: tcx prog 2053
ifindex enp5s0(3) attach_type tcx_ingress
14: tcx prog 2080
ifindex enp5s0(3) attach_type tcx_egress
[...]
Equivalent json output:
# bpftool link --json
[...]
{
"id": 10,
"type": "cgroup",
"prog_id": 1977,
"cgroup_id": 1,
"attach_type": "cgroup_inet6_post_bind"
},
[...]
{
"id": 13,
"type": "tcx",
"prog_id": 2053,
"devname": "enp5s0",
"ifindex": 3,
"attach_type": "tcx_ingress"
},
{
"id": 14,
"type": "tcx",
"prog_id": 2080,
"devname": "enp5s0",
"ifindex": 3,
"attach_type": "tcx_egress"
}
[...]
Suggested-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Yafang Shao <laoar.shao@gmail.com>
Link: https://lore.kernel.org/r/20230816095651.10014-1-daniel@iogearbox.net
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Artem Savkov <asavkov@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-10691
commit 6a8faf10709161e7138202a8cf052b070971239f
Author: Yafang Shao <laoar.shao@gmail.com>
Date: Wed Aug 30 03:03:25 2023 +0000
bpftool: Fix build warnings with -Wtype-limits
Quentin reported build warnings when building bpftool :
link.c: In function ‘perf_config_hw_cache_str’:
link.c:86:18: warning: comparison of unsigned expression in ‘>= 0’ is always true [-Wtype-limits]
86 | if ((id) >= 0 && (id) < ARRAY_SIZE(array)) \
| ^~
link.c:320:20: note: in expansion of macro ‘perf_event_name’
320 | hw_cache = perf_event_name(evsel__hw_cache, config & 0xff);
| ^~~~~~~~~~~~~~~
[... more of the same for the other calls to perf_event_name ...]
He also pointed out the reason and the solution:
We're always passing unsigned, so it should be safe to drop the check on
(id) >= 0.
Fixes: 62b57e3ddd64 ("bpftool: Add perf event names")
Reported-by: Quentin Monnet <quentin@isovalent.com>
Suggested-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Closes: https://lore.kernel.org/bpf/a35d9a2d-54a0-49ec-9ed1-8fcf1369d3cc@isovalent.com
Link: https://lore.kernel.org/bpf/20230830030325.3786-1-laoar.shao@gmail.com
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-10691
commit 62b57e3ddd64002f5b3f6fb2ea50b79a2994cfec
Author: Yafang Shao <laoar.shao@gmail.com>
Date: Sun Jul 9 02:56:29 2023 +0000
bpftool: Add perf event names
Add new functions and macros to get perf event names. These names except
the perf_type_name are all copied from
tool/perf/util/{parse-events,evsel}.c, so that in the future we will
have a good chance to use the same code.
Suggested-by: Jiri Olsa <olsajiri@gmail.com>
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20230709025630.3735-10-laoar.shao@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-9957
commit d7e45eb4802bbb3343624711e43d23b22fe7cc55
Author: Yafang Shao <laoar.shao@gmail.com>
Date: Wed May 17 10:31:26 2023 +0000
bpftool: Show target_{obj,btf}_id in tracing link info
The target_btf_id can help us understand which kernel function is
linked by a tracing prog. The target_btf_id and target_obj_id have
already been exposed to userspace, so we just need to show them.
The result as follows,
$ tools/bpf/bpftool/bpftool link show
2: tracing prog 13
prog_type tracing attach_type trace_fentry
target_obj_id 1 target_btf_id 13964
pids trace(10673)
$ tools/bpf/bpftool/bpftool link show -j
[{"id":2,"type":"tracing","prog_id":13,"prog_type":"tracing","attach_type":"trace_fentry","target_obj_id":1,"target_btf_id":13964,"pids":[{"pid":10673,"comm":"trace"}]}]
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230517103126.68372-3-laoar.shao@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Viktor Malik <vmalik@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-9957
commit 74fc8801edc279fb5f778eb91df48e4d3cd951a2
Author: Kui-Feng Lee <thinker.li@gmail.com>
Date: Fri Apr 21 14:41:31 2023 -0700
bpftool: Show map IDs along with struct_ops links.
A new link type, BPF_LINK_TYPE_STRUCT_OPS, was added to attach
struct_ops to links. (226bc6ae6405) It would be helpful for users to
know which map is associated with the link.
The assumption was that every link is associated with a BPF program, but
this does not hold true for struct_ops. It would be better to display
map_id instead of prog_id for struct_ops links. However, some tools may
rely on the old assumption and need a prog_id. The discussion on the
mailing list suggests that tools should parse JSON format. We will maintain
the existing JSON format by adding a map_id without removing prog_id. As
for plain text format, we will remove prog_id from the header line and add
a map_id for struct_ops links.
Signed-off-by: Kui-Feng Lee <kuifeng@meta.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20230421214131.352662-1-kuifeng@meta.com
Signed-off-by: Viktor Malik <vmalik@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2178930
commit 38f0408ef756e738387f7d8f62b8d58ca5938da4
Author: Ilya Leoshkevich <iii@linux.ibm.com>
Date: Wed Feb 15 00:12:16 2023 +0100
bpftool: Use bpf_{btf,link,map,prog}_get_info_by_fd()
Use the new type-safe wrappers around bpf_obj_get_info_by_fd().
Split the bpf_obj_get_info_by_fd() call in build_btf_type_table() in
two, since knowing the type helps with the Memory Sanitizer.
Improve map_parse_fd_and_info() type safety by using
struct bpf_map_info * instead of void * for info.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20230214231221.249277-4-iii@linux.ibm.com
Signed-off-by: Viktor Malik <vmalik@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2177177
Conflicts: Some minor changes due to missing commits 09b73fe9e3de
("perf smt: Compute SMT from topology") and f0c4b97a2927 ("perf test:
Add basic core_wide expression test").
commit c302378bc157f6a73b6cae4ca67f5f6aa931dcec
Author: Eduard Zingerman <eddyz87@gmail.com>
Date: Wed Nov 9 16:26:09 2022 +0200
libbpf: Hashmap interface update to allow both long and void* keys/values
An update for libbpf's hashmap interface from void* -> void* to a
polymorphic one, allowing both long and void* keys and values.
This simplifies many use cases in libbpf as hashmaps there are mostly
integer to integer.
Perf copies hashmap implementation from libbpf and has to be
updated as well.
Changes to libbpf, selftests/bpf and perf are packed as a single
commit to avoid compilation issues with any future bisect.
Polymorphic interface is acheived by hiding hashmap interface
functions behind auxiliary macros that take care of necessary
type casts, for example:
#define hashmap_cast_ptr(p) \
({ \
_Static_assert((p) == NULL || sizeof(*(p)) == sizeof(long),\
#p " pointee should be a long-sized integer or a pointer"); \
(long *)(p); \
})
bool hashmap_find(const struct hashmap *map, long key, long *value);
#define hashmap__find(map, key, value) \
hashmap_find((map), (long)(key), hashmap_cast_ptr(value))
- hashmap__find macro casts key and value parameters to long
and long* respectively
- hashmap_cast_ptr ensures that value pointer points to a memory
of appropriate size.
This hack was suggested by Andrii Nakryiko in [1].
This is a follow up for [2].
[1] https://lore.kernel.org/bpf/CAEf4BzZ8KFneEJxFAaNCCFPGqp20hSpS2aCj76uRk3-qZUH5xg@mail.gmail.com/
[2] https://lore.kernel.org/bpf/af1facf9-7bc8-8a3d-0db4-7b3f333589a2@meta.com/T/#m65b28f1d6d969fcd318b556db6a3ad499a42607d
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20221109142611.879983-2-eddyz87@gmail.com
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2166911
commit 6bdb6d6be019f697296f52c37865dd7b0ce80750
Author: Kui-Feng Lee <kuifeng@fb.com>
Date: Mon Sep 26 11:49:57 2022 -0700
bpftool: Show parameters of BPF task iterators.
Show tid or pid of iterators if giving an argument of tid or pid
For example, the command `bpftool link list` may list following
lines.
1: iter prog 2 target_name bpf_map
2: iter prog 3 target_name bpf_prog
33: iter prog 225 target_name task_file tid 1644
pids test_progs(1644)
Link 33 is a task_file iterator with tid 1644. For now, only targets
of task, task_file and task_vma may be with tid or pid to filter out
tasks other than those belonging to a process (pid) or a thread (tid).
Signed-off-by: Kui-Feng Lee <kuifeng@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Yonghong Song <yhs@fb.com>
Acked-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/bpf/20220926184957.208194-6-kuifeng@fb.com
Signed-off-by: Artem Savkov <asavkov@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2166911
commit 6f95de6d713130c953af0a40b13c1da519f91c4e
Author: Hao Luo <haoluo@google.com>
Date: Mon Aug 29 16:18:28 2022 -0700
bpftool: Add support for querying cgroup_iter link
Support dumping info of a cgroup_iter link. This includes
showing the cgroup's id and the order for walking the cgroup
hierarchy. Example output is as follows:
> bpftool link show
1: iter prog 2 target_name bpf_map
2: iter prog 3 target_name bpf_prog
3: iter prog 12 target_name cgroup cgroup_id 72 order self_only
> bpftool -p link show
[{
"id": 1,
"type": "iter",
"prog_id": 2,
"target_name": "bpf_map"
},{
"id": 2,
"type": "iter",
"prog_id": 3,
"target_name": "bpf_prog"
},{
"id": 3,
"type": "iter",
"prog_id": 12,
"target_name": "cgroup",
"cgroup_id": 72,
"order": "self_only"
}
]
Signed-off-by: Hao Luo <haoluo@google.com>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20220829231828.1016835-1-haoluo@google.com
Signed-off-by: Martin KaFai Lau <martin.lau@linux.dev>
Signed-off-by: Artem Savkov <asavkov@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2137876
commit c7e7e279dc8367920bddbe96115beef4ec2519a3
Author: Daniel Müller <deso@posteo.net>
Date: Mon May 23 23:04:28 2022 +0000
bpftool: Use libbpf_bpf_link_type_str
This change switches bpftool over to using the recently introduced
libbpf_bpf_link_type_str function instead of maintaining its own string
representation for the bpf_link_type enum.
Signed-off-by: Daniel Müller <deso@posteo.net>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20220523230428.3077108-13-deso@posteo.net
Signed-off-by: Artem Savkov <asavkov@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2137876
commit 1ba5ad36e00f46e3f7676f5de6b87f5a2f57f1f1
Author: Daniel Müller <deso@posteo.net>
Date: Mon May 23 23:04:25 2022 +0000
bpftool: Use libbpf_bpf_attach_type_str
This change switches bpftool over to using the recently introduced
libbpf_bpf_attach_type_str function instead of maintaining its own
string representation for the bpf_attach_type enum.
Note that contrary to other enum types, the variant names that bpftool
maps bpf_attach_type to do not adhere a simple to follow rule. With
bpf_prog_type, for example, the textual representation can easily be
inferred by stripping the BPF_PROG_TYPE_ prefix and lowercasing the
remaining string. bpf_attach_type violates this rule for various
variants.
We decided to fix up this deficiency with this change, meaning that
bpftool uses the same textual representations as libbpf. Supporting
tests, completion scripts, and man pages have been adjusted accordingly.
However, we did add support for accepting (the now undocumented)
original attach type names when they are provided by users.
For the test (test_bpftool_synctypes.py), I have removed the enum
representation checks, because we no longer mirror the various enum
variant names in bpftool source code. For the man page, help text, and
completion script checks we are now using enum definitions from
uapi/linux/bpf.h as the source of truth directly.
Signed-off-by: Daniel Müller <deso@posteo.net>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20220523230428.3077108-10-deso@posteo.net
Signed-off-by: Artem Savkov <asavkov@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2137876
commit b700eeb406a6c1f4d955242e06151f11f13d3e29
Author: Daniel Müller <deso@posteo.net>
Date: Mon May 23 23:04:19 2022 +0000
bpftool: Use libbpf_bpf_prog_type_str
This change switches bpftool over to using the recently introduced
libbpf_bpf_prog_type_str function instead of maintaining its own string
representation for the bpf_prog_type enum.
Signed-off-by: Daniel Müller <deso@posteo.net>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20220523230428.3077108-4-deso@posteo.net
Signed-off-by: Artem Savkov <asavkov@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2120968
Conflicts: already applied
1d5f82d9dd47 ("bpf, x86: fix freeing of not-finalized bpf_prog_pack")
commit f7e0beaf39d3868dc700d4954b26cf8443c5d423
Author: Kui-Feng Lee <kuifeng@fb.com>
Date: Tue May 10 13:59:19 2022 -0700
bpf, x86: Generate trampolines from bpf_tramp_links
Replace struct bpf_tramp_progs with struct bpf_tramp_links to collect
struct bpf_tramp_link(s) for a trampoline. struct bpf_tramp_link
extends bpf_link to act as a linked list node.
arch_prepare_bpf_trampoline() accepts a struct bpf_tramp_links to
collects all bpf_tramp_link(s) that a trampoline should call.
Change BPF trampoline and bpf_struct_ops to pass bpf_tramp_links
instead of bpf_tramp_progs.
Signed-off-by: Kui-Feng Lee <kuifeng@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220510205923.3206889-2-kuifeng@fb.com
Signed-off-by: Yauheni Kaliuta <ykaliuta@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2120968
commit fff3dfab17866f6ac5c5666839f6132b6c52f306
Author: Milan Landaverde <milan@mdaverde.com>
Date: Thu Mar 31 11:45:54 2022 -0400
bpftool: Add missing link types
Will display the link type names in bpftool link show output
Signed-off-by: Milan Landaverde <milan@mdaverde.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220331154555.422506-3-milan@mdaverde.com
Signed-off-by: Yauheni Kaliuta <ykaliuta@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2069045
commit 622a5b582cc27d3deedc38fcef68da2972e8e58d
Author: Mauricio Vásquez <mauricio@kinvolk.io>
Date: Fri Jan 7 10:26:20 2022 -0500
bpftool: Fix error check when calling hashmap__new()
hashmap__new() encodes errors with ERR_PTR(), hence it's not valid to
check the returned pointer against NULL and IS_ERR() has to be used
instead.
libbpf_get_error() can't be used in this case as hashmap__new() is not
part of the public libbpf API and it'll continue using ERR_PTR() after
libbpf 1.0.
Fixes: 8f184732b60b ("bpftool: Switch to libbpf's hashmap for pinned paths of BPF objects")
Fixes: 2828d0d75b73 ("bpftool: Switch to libbpf's hashmap for programs/maps in BTF listing")
Fixes: d6699f8e0f83 ("bpftool: Switch to libbpf's hashmap for PIDs/names references")
Signed-off-by: Mauricio Vásquez <mauricio@kinvolk.io>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20220107152620.192327-2-mauricio@kinvolk.io
Signed-off-by: Yauheni Kaliuta <ykaliuta@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2069045
commit d6699f8e0f834b40db35466f704705ae757be11a
Author: Quentin Monnet <quentin@isovalent.com>
Date: Sat Oct 23 21:51:54 2021 +0100
bpftool: Switch to libbpf's hashmap for PIDs/names references
In order to show PIDs and names for processes holding references to BPF
programs, maps, links, or BTF objects, bpftool creates hash maps to
store all relevant information. This commit is part of a set that
transitions from the kernel's hash map implementation to the one coming
with libbpf.
The motivation is to make bpftool less dependent of kernel headers, to
ease the path to a potential out-of-tree mirror, like libbpf has.
This is the third and final step of the transition, in which we convert
the hash maps used for storing the information about the processes
holding references to BPF objects (programs, maps, links, BTF), and at
last we drop the inclusion of tools/include/linux/hashtable.h.
Note: Checkpatch complains about the use of __weak declarations, and the
missing empty lines after the bunch of empty function declarations when
compiling without the BPF skeletons (none of these were introduced in
this patch). We want to keep things as they are, and the reports should
be safe to ignore.
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211023205154.6710-6-quentin@isovalent.com
Signed-off-by: Yauheni Kaliuta <ykaliuta@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2069045
commit 8f184732b60b74a8f8ba0d9a5c248bf611b1ebba
Author: Quentin Monnet <quentin@isovalent.com>
Date: Sat Oct 23 21:51:52 2021 +0100
bpftool: Switch to libbpf's hashmap for pinned paths of BPF objects
In order to show pinned paths for BPF programs, maps, or links when
listing them with the "-f" option, bpftool creates hash maps to store
all relevant paths under the bpffs. So far, it would rely on the
kernel implementation (from tools/include/linux/hashtable.h).
We can make bpftool rely on libbpf's implementation instead. The
motivation is to make bpftool less dependent of kernel headers, to ease
the path to a potential out-of-tree mirror, like libbpf has.
This commit is the first step of the conversion: the hash maps for
pinned paths for programs, maps, and links are converted to libbpf's
hashmap.{c,h}. Other hash maps used for the PIDs of process holding
references to BPF objects are left unchanged for now. On the build side,
this requires adding a dependency to a second header internal to libbpf,
and making it a dependency for the bootstrap bpftool version as well.
The rest of the changes are a rather straightforward conversion.
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211023205154.6710-4-quentin@isovalent.com
Signed-off-by: Yauheni Kaliuta <ykaliuta@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2069045
commit 46241271d18f3ae095b7ec3d9d136d8f4e28e025
Author: Quentin Monnet <quentin@isovalent.com>
Date: Sat Oct 23 21:51:51 2021 +0100
bpftool: Do not expose and init hash maps for pinned path in main.c
BPF programs, maps, and links, can all be listed with their pinned paths
by bpftool, when the "-f" option is provided. To do so, bpftool builds
hash maps containing all pinned paths for each kind of objects.
These three hash maps are always initialised in main.c, and exposed
through main.h. There appear to be no particular reason to do so: we can
just as well make them static to the files that need them (prog.c,
map.c, and link.c respectively), and initialise them only when we want
to show objects and the "-f" switch is provided.
This may prevent unnecessary memory allocations if the implementation of
the hash maps was to change in the future.
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211023205154.6710-3-quentin@isovalent.com
Signed-off-by: Yauheni Kaliuta <ykaliuta@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2041365
commit c07ba629df97b796ca7bbdfbf4748266ead27745
Author: Quentin Monnet <quentin@isovalent.com>
Date: Fri Jul 30 22:54:32 2021 +0100
tools: bpftool: Update and synchronise option list in doc and help msg
All bpftool commands support the options for JSON output and debug from
libbpf. In addition, some commands support additional options
corresponding to specific use cases.
The list of options described in the man pages for the different
commands are not always accurate. The messages for interactive help are
mostly limited to HELP_SPEC_OPTIONS, and are even less representative of
the actual set of options supported for the commands.
Let's update the lists:
- HELP_SPEC_OPTIONS is modified to contain the "default" options (JSON
and debug), and to be extensible (no ending curly bracket).
- All commands use HELP_SPEC_OPTIONS in their help message, and then
complete the list with their specific options.
- The lists of options in the man pages are updated.
- The formatting of the list for bpftool.rst is adjusted to match
formatting for the other man pages. This is for consistency, and also
because it will be helpful in a future patch to automatically check
that the files are synchronised.
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210730215435.7095-5-quentin@isovalent.com
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
The link query for bpf iterators is implemented.
Besides being shown to the user what bpf iterator
the link represents, the target_name is also used
to filter out what additional information should be
printed out, e.g., whether map_id should be shown or not.
The following is an example of bpf_iter link dump,
plain output or pretty output.
$ bpftool link show
11: iter prog 59 target_name task
pids test_progs(1749)
34: iter prog 173 target_name bpf_map_elem map_id 127
pids test_progs_1(1753)
$ bpftool -p link show
[{
"id": 11,
"type": "iter",
"prog_id": 59,
"target_name": "task",
"pids": [{
"pid": 1749,
"comm": "test_progs"
}
]
},{
"id": 34,
"type": "iter",
"prog_id": 173,
"target_name": "bpf_map_elem",
"map_id": 127,
"pids": [{
"pid": 1753,
"comm": "test_progs_1"
}
]
}
]
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200821184420.574430-1-yhs@fb.com
Fix few compilation warnings in bpftool when compiling in 32-bit mode.
Abstract away u64 to pointer conversion into a helper function.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200813204945.1020225-2-andriin@fb.com
Add ability to force-detach BPF link. Also add missing error message, if
specified link ID is wrong.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200731182830.286260-5-andriin@fb.com
Define prog_type_name in prog.c instead of main.h so it is only defined
once. This leads to a slight decrease in the binary size of bpftool.
Before:
text data bss dec hex filename
401032 11936 1573160 1986128 1e4e50 bpftool
After:
text data bss dec hex filename
399024 11168 1573160 1983352 1e4378 bpftool
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20200624143124.12914-1-tklauser@distanz.ch
Code for printing link attach_type is duplicated in a couple of places, and
likely will be duplicated for future link types as well. Create helpers to
prevent duplication.
Suggested-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200531082846.2117903-8-jakub@cloudflare.com
This is a clean-up for the formatting of the do_help functions for
bpftool's subcommands. The following fixes are included:
- Do not use argv[-2] for "iter" help message, as the help is shown by
default if no "iter" action is selected, resulting in messages looking
like "./bpftool bpftool pin...".
- Do not print unused HELP_SPEC_PROGRAM in help message for "bpftool
link".
- Andrii used argument indexing to avoid having multiple occurrences of
bin_name and argv[-2] in the fprintf() for the help message, for
"bpftool gen" and "bpftool link". Let's reuse this for all other help
functions. We can remove up to thirty arguments for the "bpftool map"
help message.
- Harmonise all functions, e.g. use ending quotes-comma on a separate
line.
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200523010751.23465-1-quentin@isovalent.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Currently, only one command is supported
bpftool iter pin <bpf_prog.o> <path>
It will pin the trace/iter bpf program in
the object file <bpf_prog.o> to the <path>
where <path> should be on a bpffs mount.
For example,
$ bpftool iter pin ./bpf_iter_ipv6_route.o \
/sys/fs/bpf/my_route
User can then do a `cat` to print out the results:
$ cat /sys/fs/bpf/my_route
fe800000000000000000000000000000 40 00000000000000000000000000000000 ...
00000000000000000000000000000000 00 00000000000000000000000000000000 ...
00000000000000000000000000000001 80 00000000000000000000000000000000 ...
fe800000000000008c0162fffebdfd57 80 00000000000000000000000000000000 ...
ff000000000000000000000000000000 08 00000000000000000000000000000000 ...
00000000000000000000000000000000 00 00000000000000000000000000000000 ...
The implementation for ipv6_route iterator is in one of subsequent
patches.
This patch also added BPF_LINK_TYPE_ITER to link query.
In the future, we may add additional parameters to pin command
by parameterizing the bpf iterator. For example, a map_id or pid
may be added to let bpf program only traverses a single map or task,
similar to kernel seq_file single_open().
We may also add introspection command for targets/iterators by
leveraging the bpf_iter itself.
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200509175920.2477247-1-yhs@fb.com
Viktor Malik
Jerome Marchand
Artem Savkov
Yauheni Kaliuta
Yonghong Song
Andrii Nakryiko
Tobias Klauser
Jakub Sitnicki
Quentin Monnet