[PATCH 11/13] erofs-utils: propagate compressed size to its callers

[Gao Xiang via Linux-erofs]

From: Gao Xiang <gaoxian...@huawei.com>

It will be later used for marking whether it can
decompress in-place.

Signed-off-by: Gao Xiang <gaoxian...@huawei.com>
---
 lib/compress.c         | 2 +-
 lib/compressor.c       | 4 ++--
 lib/compressor_lz4.c   | 2 +-
 lib/compressor_lz4hc.c | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/compress.c b/lib/compress.c
index 205a4f2..7bfb8ce 100644
--- a/lib/compress.c
+++ b/lib/compress.c
@@ -131,7 +131,7 @@ static int vle_compress_one(struct erofs_inode *inode,
                ret = erofs_compress_destsize(h, compressionlevel,
                                              ctx->queue + ctx->head,
                                              &count, dst, EROFS_BLKSIZ);
-               if (ret) {
+               if (ret <= 0) {
                        if (ret != -EAGAIN) {
                                erofs_err("failed to compress %s: %s",
                                          inode->i_srcpath,
diff --git a/lib/compressor.c b/lib/compressor.c
index a6138c6..570db14 100644
--- a/lib/compressor.c
+++ b/lib/compressor.c
@@ -26,13 +26,13 @@ int erofs_compress_destsize(struct erofs_compress *c,
 
        ret = c->alg->compress_destsize(c, compression_level,
                                        src, srcsize, dst, dstsize);
-       if (ret)
+       if (ret < 0)
                return ret;
 
        /* check if there is enough gains to compress */
        if (*srcsize <= dstsize * c->compress_threshold / 100)
                return -EAGAIN;
-       return 0;
+       return ret;
 }
 
 int erofs_compressor_init(struct erofs_compress *c,
diff --git a/lib/compressor_lz4.c b/lib/compressor_lz4.c
index eacd21c..0d33223 100644
--- a/lib/compressor_lz4.c
+++ b/lib/compressor_lz4.c
@@ -21,7 +21,7 @@ static int lz4_compress_destsize(struct erofs_compress *c,
        if (!rc)
                return -EFAULT;
        *srcsize = srcSize;
-       return 0;
+       return rc;
 }
 
 static int compressor_lz4_exit(struct erofs_compress *c)
diff --git a/lib/compressor_lz4hc.c b/lib/compressor_lz4hc.c
index 3bbb754..d9413e2 100644
--- a/lib/compressor_lz4hc.c
+++ b/lib/compressor_lz4hc.c
@@ -25,7 +25,7 @@ static int lz4hc_compress_destsize(struct erofs_compress *c,
        if (!rc)
                return -EFAULT;
        *srcsize = srcSize;
-       return 0;
+       return rc;
 }
 
 static int compressor_lz4hc_exit(struct erofs_compress *c)
-- 
2.17.1