pstore: add zstd compression support
This patch added the 6th compression algorithm support for pstore: zstd.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index c238ab8..15e99d5 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -34,6 +34,9 @@
#if IS_ENABLED(CONFIG_PSTORE_LZ4_COMPRESS) || IS_ENABLED(CONFIG_PSTORE_LZ4HC_COMPRESS)
#include <linux/lz4.h>
#endif
+#if IS_ENABLED(CONFIG_PSTORE_ZSTD_COMPRESS)
+#include <linux/zstd.h>
+#endif
#include <linux/crypto.h>
#include <linux/string.h>
#include <linux/timer.h>
@@ -192,6 +195,13 @@ static int zbufsize_842(size_t size)
}
#endif
+#if IS_ENABLED(CONFIG_PSTORE_ZSTD_COMPRESS)
+static int zbufsize_zstd(size_t size)
+{
+ return ZSTD_compressBound(size);
+}
+#endif
+
static const struct pstore_zbackend *zbackend __ro_after_init;
static const struct pstore_zbackend zbackends[] = {
@@ -225,6 +235,12 @@ static const struct pstore_zbackend zbackends[] = {
.name = "842",
},
#endif
+#if IS_ENABLED(CONFIG_PSTORE_ZSTD_COMPRESS)
+ {
+ .zbufsize = zbufsize_zstd,
+ .name = "zstd",
+ },
+#endif
{ }
};