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dracut
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feat: support ZSTD-compressed kernel modules 

Modern Linux kernels support zstd-compressed modules, which was added
by commit 73f3d1b48f50 ("lib: Add zstd modules").

Commit c3d7ef377eb ("kbuild: add support for zstd compressed modules")
added support of compressing modules with zstd to kernel Makefiles.

libkmod >= 28 built with libzstd is also required.
master
Mikhail Novosyolov 2021-05-04 12:28:46 +03:00 committed by Jóhann B. Guðmundsson
parent 4a76c187d0
commit ce9af251af
3 changed files with 6 additions and 0 deletions
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1
dracut-init.sh
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@ -625,6 +625,7 @@ get_decompress_cmd() {
*.gz) echo 'gzip -f -d' ;; *.gz) echo 'gzip -f -d' ;;
*.bz2) echo 'bzip2 -d' ;; *.bz2) echo 'bzip2 -d' ;;
*.xz) echo 'xz -f -d' ;; *.xz) echo 'xz -f -d' ;;
*.zst) echo 'zstd -f -d ' ;;
esac esac
} }



1
dracut.sh
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@ -1271,6 +1271,7 @@ if [[ $no_kernel != yes ]] && [[ -d $srcmods ]]; then
case "$_mod" in case "$_mod" in
*.ko.gz) kcompress=gzip ;; *.ko.gz) kcompress=gzip ;;
*.ko.xz) kcompress=xz ;; *.ko.xz) kcompress=xz ;;
*.ko.zst) kcompress=zstd ;;
esac esac
if [[ $kcompress ]]; then if [[ $kcompress ]]; then
if ! command -v "$kcompress" &> /dev/null; then if ! command -v "$kcompress" &> /dev/null; then

4
install/dracut-install.c
View File

@ -1937,6 +1937,10 @@ static int install_modules(int argc, char **argv)
int len = strlen(modname); int len = strlen(modname);
modname[len - 6] = 0; modname[len - 6] = 0;
} }
if (endswith(modname, ".ko.zst")) {
int len = strlen(modname);
modname[len - 7] = 0;
}
r = kmod_module_new_from_lookup(ctx, modname, &modlist); r = kmod_module_new_from_lookup(ctx, modname, &modlist);
if (r < 0) { if (r < 0) {
if (!arg_optional) { if (!arg_optional) {