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[contrib][linux-kernel] Add zstd_min_clevel() and zstd_max_clevel()

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This commit is contained in:
Nick Terrell 2021-03-29 17:52:28 -07:00 committed by Nick Terrell
parent a494308ae9
commit d334ad2ff4
3 changed files with 35 additions and 0 deletions
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14
contrib/linux-kernel/linux_zstd.h
View File

@ -63,6 +63,20 @@ zstd_error_code zstd_get_error_code(size_t code);
*/
const char *zstd_get_error_name(size_t code);
/**
* zstd_min_clevel() - minimum allowed compression level
*
* Return: The minimum allowed compression level.
*/
int zstd_min_clevel(void);
/**
* zstd_max_clevel() - maximum allowed compression level
*
* Return: The maximum allowed compression level.
*/
int zstd_max_clevel(void);
/* ====== Parameter Selection ====== */
/**

9
contrib/linux-kernel/test/test.c
View File

@ -169,6 +169,13 @@ static void test_decompress_unzstd(test_data_t const *data) {
fprintf(stderr, "Ok\n");
}
static void test_f2fs() {
fprintf(stderr, "testing f2fs uses... ");
CONTROL(zstd_min_clevel() < 0);
CONTROL(zstd_max_clevel() == 22);
fprintf(stderr, "Ok\n");
}
static char *g_stack = NULL;
static void __attribute__((noinline)) use(void *x) {
@ -195,6 +202,7 @@ static void __attribute__((noinline)) check_stack() {
static void test_stack_usage(test_data_t const *data) {
set_stack();
test_f2fs();
test_btrfs(data);
test_decompress_unzstd(data);
check_stack();
@ -202,6 +210,7 @@ static void test_stack_usage(test_data_t const *data) {
int main(void) {
test_data_t data = create_test_data();
test_f2fs();
test_btrfs(&data);
test_decompress_unzstd(&data);
test_stack_usage(&data);

12
contrib/linux-kernel/zstd_compress_module.c
View File

@ -17,6 +17,18 @@
#include "common/zstd_deps.h"
#include "common/zstd_internal.h"
int zstd_min_clevel(void)
{
return ZSTD_minCLevel();
}
EXPORT_SYMBOL(zstd_min_clevel);
int zstd_max_clevel(void)
{
return ZSTD_maxCLevel();
}
EXPORT_SYMBOL(zstd_max_clevel);
size_t zstd_compress_bound(size_t src_size)
{
return ZSTD_compressBound(src_size);