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From 895c930b1418798509a1f19706b6a1be188ad303 Mon Sep 17 00:00:00 2001
From: Liu Yuntao <liuyuntao10@huawei.com>
Date: Sat, 2 Jul 2022 13:59:25 +0800
Subject: [PATCH] Give a warning when using kabi outside our stablelists.
Add a script that will find requirements for your package. It can make an
additional kabi whitelist check for you, compared with rpmbuild's builtin
requirement scanner. You may add "%define _use_internal_dependency_generator 0"
in your .spec file to enable this feature.
synced from CentOS's implementation.
---
find-requires | 38 +++++++++++
find-requires.ksyms | 155 ++++++++++++++++++++++++++++++++++++++++++++
macros.kmp | 3 +-
3 files changed, 195 insertions(+), 1 deletion(-)
create mode 100644 find-requires
create mode 100644 find-requires.ksyms
diff --git a/find-requires b/find-requires
new file mode 100644
index 0000000..b7cd825
--- /dev/null
+++ b/find-requires
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+#
+# Auto-generate requirements for executables (both ELF and a.out) and library
+# sonames, script interpreters, and perl modules.
+#
+
+ulimit -c 0
+
+filelist=`sed "s/[]['\"*?{}]/\\\\\&/g"`
+
+[ -x /usr/lib/rpm/rpmdeps -a -n "$filelist" ] && \
+ echo $filelist | tr '[:blank:]' \\n | /usr/lib/rpm/rpmdeps --requires
+
+#
+# --- Kernel module imported symbols
+#
+# Since we don't (yet) get passed the name of the package being built, we
+# cheat a little here by looking first for a kernel, then for a kmod.
+#
+
+unset is_kmod
+
+for f in $filelist; do
+ if [ $(echo "$f" | sed -r -ne 's:^.*/lib/modules/(.*)/(.*)\.ko(\.gz|\.bz2|\.xz)?$:\2:p') ]
+ then
+ is_kmod=1;
+ elif [ $(echo "$f" | sed -r -ne 's:^.*/boot/(.*):\1:p') ]
+ then
+ unset is_kmod;
+ break;
+ fi
+done
+
+[ -x /usr/lib/rpm/__vendor/find-requires.ksyms ] && [ "$is_kmod" ] &&
+ printf "%s\n" "${filelist[@]}" | /usr/lib/rpm/__vendor/find-requires.ksyms
+
+exit 0
diff --git a/find-requires.ksyms b/find-requires.ksyms
new file mode 100644
index 0000000..15cc729
--- /dev/null
+++ b/find-requires.ksyms
@@ -0,0 +1,155 @@
+#! /bin/bash
+#
+# This script is called during external module building to create dependencies
+# both upon the linux kernel, and on additional external modules. Symbols that
+# cannot be reconciled against those provided by the kernel are assumed to be
+# provided by an external module and "ksym" replaces th regular "kernel" dep.
+
+IFS=$'\n'
+
+# Extract all of the symbols provided by this module.
+all_provides() {
+ for module in "$@"; do
+ tmpfile=""
+ if [ "x${module%.ko}" = "x${module}" ]; then
+ tmpfile=$(mktemp -t ${0##*/}.XXXXXX.ko)
+ proc_bin=
+ case "${module##*.}" in
+ xz)
+ proc_bin=xz
+ ;;
+ bz2)
+ proc_bin=bzip2
+ ;;
+ gz)
+ proc_bin=gzip
+ ;;
+ esac
+
+ [ -n "$proc_bin" ] || continue
+
+ "$proc_bin" -d -c - < "$module" > "$tmpfile" || continue
+ module="$tmpfile"
+ fi
+
+ if [[ -n $(nm "$module" | sed -r -ne 's:^0*([0-9a-f]+) A __crc_(.+):0x\1 \2:p') ]]; then
+ nm "$module" \
+ | sed -r -ne 's:^0*([0-9a-f]+) A __crc_(.+):0x\1 \2:p' \
+ | awk --non-decimal-data '{printf("%s:0x%08x\n", $2, $1)}'
+ else
+ ELFRODATA=$(readelf -R .rodata "$module" | awk '/0x/{printf $2$3$4$5}')
+ if [[ -n $(readelf -h "$module" | grep "little endian") ]]; then
+ RODATA=$(echo $ELFRODATA | sed 's/\(..\)\(..\)\(..\)\(..\)/\4\3\2\1/g')
+ else
+ RODATA=$ELFRODATA
+ fi
+ for sym in $(nm "$module" | sed -r -ne 's:^0*([0-9a-f]+) R __crc_(.+):0x\1 \2:p'); do
+ echo $sym $RODATA
+ done \
+ | awk --non-decimal-data '{printf("%s:0x%08s\n", $2, substr($3,($1*2)+1,8))}'
+ fi
+
+ [ -z "$tmpfile" ] || rm -f -- "$tmpfile"
+ done \
+ | LC_ALL=C sort -k1,1 -u
+}
+
+# Extract all of the requirements of this module.
+all_requires() {
+ for module in "$@"; do
+ set -- $(/sbin/modinfo -F vermagic "$module" | sed -e 's: .*::' -e q)
+ /sbin/modprobe --dump-modversions "$module" \
+ | awk --non-decimal-data '
+ BEGIN { FS = "\t" ; OFS = "\t" }
+ {printf("%s:0x%08x\n", $2, $1)}' \
+ | sed -r -e 's:$:\t'"$1"':'
+ done \
+ | LC_ALL=C sort -k1,1 -u
+}
+
+# Filter out requirements fulfilled by the module itself.
+mod_requires() {
+ LC_ALL=C join -t $'\t' -j 1 -v 1 \
+ <(all_requires "$@") \
+ <(all_provides "$@") \
+ | LC_ALL=C sort -k1,1 -u
+}
+
+if ! [ -e /sbin/modinfo -a -e /sbin/modprobe ]; then
+ cat > /dev/null
+ exit 0
+fi
+
+check_kabi() {
+ arch=$(uname -m)
+ kabi_file="/lib/modules/kabi-current/kabi_stablelist_$arch"
+
+ # If not installed, output a warning and return (continue)
+ if [ ! -f "$kabi_file" ]; then
+ echo "" >&2
+ echo "********************************************************************************" >&2
+ echo "*********************** KERNEL ABI COMPATIBILITY WARNING ***********************" >&2
+ echo "********************************************************************************" >&2
+ echo "The kernel ABI reference files (provided by "kernel-abi-stablelists") were not found." >&2
+ echo "No compatibility check was performed. Please install the kABI reference files" >&2
+ echo "and rebuild if you would like to verify compatibility with kernel ABI." >&2
+ echo "" >&2
+ return
+ fi
+
+ unset non_kabi
+ for symbol in "$@"; do
+ if ! egrep "^$symbol\$" $kabi_file >/dev/null; then
+ non_kabi=("${non_kabi[@]}" "$symbol")
+ fi
+ done
+
+ if [ ${#non_kabi[@]} -gt 0 ]; then
+ echo "" >&2
+ echo "********************************************************************************" >&2
+ echo "*********************** KERNEL ABI COMPATIBILITY WARNING ***********************" >&2
+ echo "********************************************************************************" >&2
+ echo "The following kernel symbols are not guaranteed to remain compatible with" >&2
+ echo "future kernel updates to this RHEL release:" >&2
+ echo "" >&2
+ for symbol in "${non_kabi[@]}"; do
+ printf "\t$symbol\n" >&2
+ done
+ echo "" >&2
+ echo "__vendor recommends that you consider using only official kernel ABI symbols" >&2
+ echo "where possible. Requests for additions to the kernel ABI can be filed with" >&2
+ echo "your partner or customer representative (component: driver-update-program)." >&2
+ echo "" >&2
+ fi
+}
+
+modules=($(grep -E '/lib/modules/.+\.ko(\.gz|\.bz2|\.xz)?$'))
+if [ ${#modules[@]} -gt 0 ]; then
+ kernel=$(/sbin/modinfo -F vermagic "${modules[0]}" | sed -e 's: .*::' -e q)
+
+ # get all that kernel provides
+ symvers=$(mktemp -t ${0##*/}.XXXXX)
+
+ cat /usr/src/kernels/$kernel/Module.symvers | awk '
+ BEGIN { FS = "\t" ; OFS = "\t" }
+ { print $2 ":" $1 }
+ ' \
+ | sed -r -e 's:$:\t'"$kernel"':' \
+ | LC_ALL=C sort -k1,1 -u > $symvers
+
+ # Symbols matching with the kernel get a "kernel" dependency
+ mod_req=$(mktemp -t mod_req.XXXXX)
+ mod_requires "${modules[@]}" > "$mod_req"
+ LC_ALL=C join -t $'\t' -j 1 $symvers "$mod_req" | LC_ALL=C sort -u \
+ | awk 'BEGIN { FS = "[\t:]" ; OFS = "\t" } { print "kernel(" $1 ") = " $2 }'
+
+ # Symbols from elsewhere get a "ksym" dependency
+ LC_ALL=C join -t $'\t' -j 1 -v 2 $symvers "$mod_req" | LC_ALL=C sort -u \
+ | awk 'BEGIN { FS = "[\t:]" ; OFS = "\t" } { print "ksym(" $1 ") = " $2 }'
+
+ # Check kABI if the kernel-abi-stablelists package is installed
+ # Do this last so we can try to output this error at the end
+ kabi_check_symbols=($(LC_ALL=C join -t $'\t' -j 1 $symvers "$mod_req" | LC_ALL=C sort -u \
+ | awk 'BEGIN { FS = "[\t:]" ; OFS = "\t" } { print $1 }'))
+ check_kabi "${kabi_check_symbols[@]}"
+fi
diff --git a/macros.kmp b/macros.kmp
index 5207045..df7e41e 100644
--- a/macros.kmp
+++ b/macros.kmp
@@ -1,7 +1,8 @@
-# Use these macros to differentiate between RH and other KMP implementation(s).
+# Use these macros to differentiate between __vendor and other KMP implementation(s).
kernel_module_package_release 1
+__find_requires /usr/lib/rpm/__vendor/find-requires
#kernel_module_package [ -n name ] [ -v version ] [ -r release ]
--
2.27.0
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