* tools/libbpf: support bigger BTF data sizes
While it's understandable why kernel limits number of BTF types to 65535
and size of string section to 64KB, in libbpf as user-space library it's
too restrictive. E.g., pahole converting DWARF to BTF type information
for Linux kernel generates more than 3 million BTF types and more than
3MB of strings, before deduplication. So to allow btf__dedup() to do its
work, we need to be able to load bigger BTF sections using btf__new().
Singed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
* sync: latest libbpf changes from kernel
Syncing latest libbpf commits from kernel repository.
Baseline commit: 789f6bab849e04ea029c09b81dc8401dc0268cf9
Checkpoint commit: 5aab392c55c96f9bb26d9294f965f156a87ee81c
Andrii Nakryiko (1):
tools/libbpf: support bigger BTF data sizes
src/btf.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
--
2.17.1
This script automates the process of applying libbpf-relevant changes
from kernel repository on top of current state of libbpf repository.
It uses CHECKPOINT-COMMIT file to keep track of last commit in kernel
repo up to which libbpf is in sync with. If there are any new libbpf
changes in kernel repository, script extracts them, preserving original
commit metadata. It also creates a "sync commit" using cover letter as
a template, which nicely summarizes changes since last sync with kernel.
Usage: ./scripts/sync-kernel.sh <linux-repo> <libbpf-repo>
If it succeeds, script will create a bunch of local commits in
<libbpf-repo> in separate branch, which can be easily pushed into github
to create a pull request.
Script tries to clean up after itself, except in case of failure. But it
doesn't clean up timestamped branches it creates in both kernel and
libbpf repositories for now. We can add that later.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
bpf_common.h is hardly ever changed so it was not installed together
with other uapi headers. Some environments are still prefer to be
consistent and install all relevant uapi headers so add bpf_common.h to
uapi headers.
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Sync with the following bug fix:
commit a8a1f7d09cfc7e18874786c7634c9e71384fcd4e (HEAD -> bpf-next2, bpf-next/master)
Author: Stanislav Fomichev <sdf@google.com>
Date: Mon Feb 4 16:20:55 2019 -0800
libbpf: fix libbpf_print
With the recent print rework we now have the following problem:
pr_{warning,info,debug} expand to __pr which calls libbpf_print.
libbpf_print does va_start and calls __libbpf_pr with va_list argument.
In __base_pr we again do va_start. Because the next argument is a
va_list, we don't get correct pointer to the argument (and print noting
in my case, I don't know why it doesn't crash tbh).
......
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Otherwise, we will have the following compilation error:
/home/yhs/work/bcc-new/src/cc/libbpf/src/bpf_prog_linfo.c:
In function ‘dissect_jited_func’:
/home/yhs/work/bcc-new/src/cc/libbpf/src/bpf_prog_linfo.c:88:10:
error: ‘EINVAL’ undeclared (first use in this function)
return -EINVAL;
The original linux/err.h at linux:tools/include directory
does include "asm/errno.h" as well.
Signed-off-by: Yonghong Song <yhs@fb.com>
Builds on debian stretch are failing due to:
../scripts/check-reallocarray.sh: 17: ../scripts/check-reallocarray.sh: Syntax error: Bad fd number
Fix the redirect of stdout and stderr.
Signed-off-by: David Ahern <dsahern@gmail.com>
sync with latest bpf-next tree.
the include/linux/filter.h is created as libbpf.c tries
to use various insn define macros.
Signed-off-by: Yonghong Song <yhs@fb.com>
* Sync from bpf-next
Sync the following commits from bpf-next:
commit ab9e08482122 ("libbpf: Per-symbol visibility for DSO")
commit c034a177d3c8 ("bpf: bpftool, add flag to allow non-compat map definitions")
Signed-off-by: Andrey Ignatov <rdna@fb.com>
* Use -fvisibility=hidden by default for DSO
This is Makefile part of:
commit ab9e08482122 ("libbpf: Per-symbol visibility for DSO")
See original commit for details.
Introduce multiple improvements to Makefile to make the build more
flexible and support install:
* Support overriding CFLAGS by user but keep required flags in place.
ALL_FLAGS is used in Makefile as recommended in [1].
* Add additional BUILD_SHARED flag to build dynamically linked flavor of
the library. If the flag is set, -fPIC is also passed to make it
possible to build .so.
* Support building in a separate directory provided by OBJDIR variable.
* Add multiple install targets. By default the library itself and libbpf
headers are installed (install target). UAPI headers can be optionally
installed by user.
* All installation paths, including PREFIX, library and include
directories can be overridden. UAPI can be made different from include
directory for libbpf headers. That makes it possible to keep latest
<linux/bpf.h> in a place that doesn't conflict with the one installed
e.g. by kernel-headers package and use it in user's build system.
* Support DESTDIR (see [2]).
* Support overriding LDFLAGS.
* Use utilities such as rm directly as recommended in [3].
* Use compiler and related programs (such as ar) via make variables as
recommended in [3].
* In clean rule remove all possible build artifacts not to rely on passed
options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it).
* Document new build options in README.
[1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables
[2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html
[3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles
Signed-off-by: Andrey Ignatov <rdna@fb.com>
This initial commit added the following files
from bpf-next repository:
src:
<files from linux:tools/lib/bpf>
bpf.c bpf.h btf.c btf.h libbpf.c libbpf.h
libbpf_errno.c netlink.c nlattr.c nlattr.h
str_error.c str_error.h
include:
<files from linux:tools/include/uapi/linux>
uapi/linux/{bpf.h, btf.h}
<files from linux:tools/include/tools>
tools/libc_compat.h
The following files are also added:
include/linux/{err.h, kernel.h, list.h, overflow.h, types.h}
These files are customized headers to satisfy compilation.
Their original counterparts are at linux:tools/include/linux
directory.
Signed-off-by: Yonghong Song <yhs@fb.com>
