[PATCH 04/49] btrfs: Use U-Boot API for decompression

Simon Glass
2021-05-03T23:10:51Z

Use the common function to avoid code duplication.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

(no changes since v1)

fs/btrfs/compression.c | 51 +++++-------------------------------------
1 file changed, 5 insertions(+), 46 deletions(-)

diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 23efefa1997..7adfbb04a7c 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -6,6 +6,7 @@
*/

#include "btrfs.h"
+#include <abuf.h>
#include <log.h>
#include <malloc.h>
#include <linux/lzo.h>
@@ -136,54 +137,12 @@ static u32 decompress_zlib(const u8 *_cbuf, u32 clen, u8 *dbuf, u32 dlen)

static u32 decompress_zstd(const u8 *cbuf, u32 clen, u8 *dbuf, u32 dlen)
{
- ZSTD_DStream *dstream;
- ZSTD_inBuffer in_buf;
- ZSTD_outBuffer out_buf;
- void *workspace;
- size_t wsize;
- u32 res = -1;
-
- wsize = ZSTD_DStreamWorkspaceBound(ZSTD_BTRFS_MAX_INPUT);
- workspace = malloc(wsize);
- if (!workspace) {
- debug("%s: cannot allocate workspace of size %zu\n", __func__,
- wsize);
- return -1;
- }
-
- dstream = ZSTD_initDStream(ZSTD_BTRFS_MAX_INPUT, workspace, wsize);
- if (!dstream) {
- printf("%s: ZSTD_initDStream failed\n", __func__);
- goto err_free;
- }
+ struct abuf in, out;

- in_buf.src = cbuf;
- in_buf.pos = 0;
- in_buf.size = clen;
+ abuf_init_set(&in, (u8 *)cbuf, clen);
+ abuf_init_set(&out, dbuf, dlen);

- out_buf.dst = dbuf;
- out_buf.pos = 0;
- out_buf.size = dlen;
-
- while (1) {
- size_t ret;
-
- ret = ZSTD_decompressStream(dstream, &out_buf, &in_buf);
- if (ZSTD_isError(ret)) {
- printf("%s: ZSTD_decompressStream error %d\n", __func__,
- ZSTD_getErrorCode(ret));
- goto err_free;
- }
-
- if (in_buf.pos >= clen || !ret)
- break;
- }
-
- res = out_buf.pos;
-
-err_free:
- free(workspace);
- return res;
+ return zstd_decompress(&in, &out);
}

u32 btrfs_decompress(u8 type, const char *c, u32 clen, char *d, u32 dlen)
--
2.31.1.527.g47e6f16901-goog