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sync: teach sync script to generate bpf_helper_defs.h

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Linux repo doesn't commit bpf_helper_defs.h, as it's re-generated on
build every time. For Github projection, though, it's much nicer to have
this header be pre-generated during sync and commited. This makes
integration story easier for all the users that use libbpf as
a submodule.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
This commit is contained in:
Andrii Nakryiko
2019-10-09 14:23:58 -07:00
committed by Andrii Nakryiko
parent 46688687d5
commit e776bf7ec7
1 changed files with 20 additions and 2 deletions
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22
scripts/sync-kernel.sh
View File

@@ -191,6 +191,7 @@ cherry_pick_commits()
}
cd_to ${LIBBPF_REPO}
GITHUB_ABS_DIR=$(pwd)
echo "Dumping existing libbpf commit signatures..."
for h in $(git log --pretty='%h' -n500); do
echo $h "$(commit_signature $h)" >> ${TMP_DIR}/libbpf_commits.txt
@@ -198,6 +199,7 @@ done
# Use current kernel repo HEAD as a source of patches
cd_to ${LINUX_REPO}
LINUX_ABS_DIR=$(pwd)
TIP_SYM_REF=$(git symbolic-ref -q --short HEAD || git rev-parse HEAD)
TIP_COMMIT=$(git rev-parse HEAD)
BPF_TIP_COMMIT=$(git rev-parse ${BPF_BRANCH})
@@ -273,6 +275,24 @@ for patch in $(ls -1 ${TMP_DIR}/patches | tail -n +2); do
fi
done
# Generate bpf_helper_defs.h and commit, if anything changed
# restore Linux tip to use bpf_helpers_doc.py
cd_to ${LINUX_REPO}
git checkout ${TIP_TAG}
# re-generate bpf_helper_defs.h
cd_to ${LIBBPF_REPO}
"${LINUX_ABS_DIR}/scripts/bpf_helpers_doc.py" --header \
--file include/uapi/linux/bpf.h > src/bpf_helper_defs.h
# if anything changed, commit it
helpers_changes=$(git status --porcelain src/bpf_helper_defs.h | wc -l)
if ((${helpers_changes} == 1)); then
git add src/bpf_helper_defs.h
git commit -m "sync: auto-generate latest BPF helpers
Latest changes to BPF helper definitions.
" -- src/bpf_helper_defs.h
fi
# Use generated cover-letter as a template for "sync commit" with
# baseline and checkpoint commits from kernel repo (and leave summary
# from cover letter intact, of course)
@@ -296,14 +316,12 @@ echo "SUCCESS! ${COMMIT_CNT} commits synced."
echo "Verifying Linux's and Github's libbpf state"
cd_to ${LINUX_REPO}
LINUX_ABS_DIR=$(pwd)
git checkout -b ${VIEW_TAG} ${TIP_COMMIT}
git filter-branch -f --tree-filter "${LIBBPF_TREE_FILTER}" ${VIEW_TAG}^..${VIEW_TAG}
git filter-branch -f --subdirectory-filter __libbpf ${VIEW_TAG}^..${VIEW_TAG}
git ls-files -- ${LIBBPF_VIEW_PATHS[@]} > ${TMP_DIR}/linux-view.ls
cd_to ${LIBBPF_REPO}
GITHUB_ABS_DIR=$(pwd)
git ls-files -- ${LIBBPF_VIEW_PATHS[@]} | grep -v -E "${LIBBPF_VIEW_EXCLUDE_REGEX}" > ${TMP_DIR}/github-view.ls
echo "Comparing list of files..."