crypto: compress - Return produced bytes in crypto_{,de}compress_{update,final}

If crypto_{,de}compress_{update,final}() succeed, return the actual number of
bytes produced instead of zero, so their users don't have to calculate that
theirselves.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index f93b26d..376ea88 100644 (file)
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -1002,24 +1002,25 @@ static int test_pcomp(struct crypto_pcomp *tfm,
        const char *algo = crypto_tfm_alg_driver_name(crypto_pcomp_tfm(tfm));
        unsigned int i;
        char result[COMP_BUF_SIZE];
-       int error;
+       int res;
 
        for (i = 0; i < ctcount; i++) {
                struct comp_request req;
+               unsigned int produced = 0;
 
-               error = crypto_compress_setup(tfm, ctemplate[i].params,
-                                             ctemplate[i].paramsize);
-               if (error) {
+               res = crypto_compress_setup(tfm, ctemplate[i].params,
+                                           ctemplate[i].paramsize);
+               if (res) {
                        pr_err("alg: pcomp: compression setup failed on test "
-                              "%d for %s: error=%d\n", i + 1, algo, error);
-                       return error;
+                              "%d for %s: error=%d\n", i + 1, algo, res);
+                       return res;
                }
 
-               error = crypto_compress_init(tfm);
-               if (error) {
+               res = crypto_compress_init(tfm);
+               if (res) {
                        pr_err("alg: pcomp: compression init failed on test "
-                              "%d for %s: error=%d\n", i + 1, algo, error);
-                       return error;
+                              "%d for %s: error=%d\n", i + 1, algo, res);
+                       return res;
                }
 
                memset(result, 0, sizeof(result));
@@ -1029,32 +1030,37 @@ static int test_pcomp(struct crypto_pcomp *tfm,
                req.next_out = result;
                req.avail_out = ctemplate[i].outlen / 2;
 
-               error = crypto_compress_update(tfm, &req);
-               if (error && (error != -EAGAIN || req.avail_in)) {
+               res = crypto_compress_update(tfm, &req);
+               if (res < 0 && (res != -EAGAIN || req.avail_in)) {
                        pr_err("alg: pcomp: compression update failed on test "
-                              "%d for %s: error=%d\n", i + 1, algo, error);
-                       return error;
+                              "%d for %s: error=%d\n", i + 1, algo, res);
+                       return res;
                }
+               if (res > 0)
+                       produced += res;
 
                /* Add remaining input data */
                req.avail_in += (ctemplate[i].inlen + 1) / 2;
 
-               error = crypto_compress_update(tfm, &req);
-               if (error && (error != -EAGAIN || req.avail_in)) {
+               res = crypto_compress_update(tfm, &req);
+               if (res < 0 && (res != -EAGAIN || req.avail_in)) {
                        pr_err("alg: pcomp: compression update failed on test "
-                              "%d for %s: error=%d\n", i + 1, algo, error);
-                       return error;
+                              "%d for %s: error=%d\n", i + 1, algo, res);
+                       return res;
                }
+               if (res > 0)
+                       produced += res;
 
                /* Provide remaining output space */
                req.avail_out += COMP_BUF_SIZE - ctemplate[i].outlen / 2;
 
-               error = crypto_compress_final(tfm, &req);
-               if (error) {
+               res = crypto_compress_final(tfm, &req);
+               if (res < 0) {
                        pr_err("alg: pcomp: compression final failed on test "
-                              "%d for %s: error=%d\n", i + 1, algo, error);
-                       return error;
+                              "%d for %s: error=%d\n", i + 1, algo, res);
+                       return res;
                }
+               produced += res;
 
                if (COMP_BUF_SIZE - req.avail_out != ctemplate[i].outlen) {
                        pr_err("alg: comp: Compression test %d failed for %s: "
@@ -1064,6 +1070,13 @@ static int test_pcomp(struct crypto_pcomp *tfm,
                        return -EINVAL;
                }
 
+               if (produced != ctemplate[i].outlen) {
+                       pr_err("alg: comp: Compression test %d failed for %s: "
+                              "returned len = %u (expected %d)\n", i + 1,
+                              algo, produced, ctemplate[i].outlen);
+                       return -EINVAL;
+               }
+
                if (memcmp(result, ctemplate[i].output, ctemplate[i].outlen)) {
                        pr_err("alg: pcomp: Compression test %d failed for "
                               "%s\n", i + 1, algo);
@@ -1074,21 +1087,21 @@ static int test_pcomp(struct crypto_pcomp *tfm,
 
        for (i = 0; i < dtcount; i++) {
                struct comp_request req;
+               unsigned int produced = 0;
 
-               error = crypto_decompress_setup(tfm, dtemplate[i].params,
-                                               dtemplate[i].paramsize);
-               if (error) {
+               res = crypto_decompress_setup(tfm, dtemplate[i].params,
+                                             dtemplate[i].paramsize);
+               if (res) {
                        pr_err("alg: pcomp: decompression setup failed on "
-                              "test %d for %s: error=%d\n", i + 1, algo,
-                              error);
-                       return error;
+                              "test %d for %s: error=%d\n", i + 1, algo, res);
+                       return res;
                }
 
-               error = crypto_decompress_init(tfm);
-               if (error) {
+               res = crypto_decompress_init(tfm);
+               if (res) {
                        pr_err("alg: pcomp: decompression init failed on test "
-                              "%d for %s: error=%d\n", i + 1, algo, error);
-                       return error;
+                              "%d for %s: error=%d\n", i + 1, algo, res);
+                       return res;
                }
 
                memset(result, 0, sizeof(result));
@@ -1098,35 +1111,38 @@ static int test_pcomp(struct crypto_pcomp *tfm,
                req.next_out = result;
                req.avail_out = dtemplate[i].outlen / 2;
 
-               error = crypto_decompress_update(tfm, &req);
-               if (error  && (error != -EAGAIN || req.avail_in)) {
+               res = crypto_decompress_update(tfm, &req);
+               if (res < 0 && (res != -EAGAIN || req.avail_in)) {
                        pr_err("alg: pcomp: decompression update failed on "
-                              "test %d for %s: error=%d\n", i + 1, algo,
-                              error);
-                       return error;
+                              "test %d for %s: error=%d\n", i + 1, algo, res);
+                       return res;
                }
+               if (res > 0)
+                       produced += res;
 
                /* Add remaining input data */
                req.avail_in += (dtemplate[i].inlen + 1) / 2;
 
-               error = crypto_decompress_update(tfm, &req);
-               if (error  && (error != -EAGAIN || req.avail_in)) {
+               res = crypto_decompress_update(tfm, &req);
+               if (res < 0 && (res != -EAGAIN || req.avail_in)) {
                        pr_err("alg: pcomp: decompression update failed on "
-                              "test %d for %s: error=%d\n", i + 1, algo,
-                              error);
-                       return error;
+                              "test %d for %s: error=%d\n", i + 1, algo, res);
+                       return res;
                }
+               if (res > 0)
+                       produced += res;
 
                /* Provide remaining output space */
                req.avail_out += COMP_BUF_SIZE - dtemplate[i].outlen / 2;
 
-               error = crypto_decompress_final(tfm, &req);
-               if (error  && (error != -EAGAIN || req.avail_in)) {
+               res = crypto_decompress_final(tfm, &req);
+               if (res < 0 && (res != -EAGAIN || req.avail_in)) {
                        pr_err("alg: pcomp: decompression final failed on "
-                              "test %d for %s: error=%d\n", i + 1, algo,
-                              error);
-                       return error;
+                              "test %d for %s: error=%d\n", i + 1, algo, res);
+                       return res;
                }
+               if (res > 0)
+                       produced += res;
 
                if (COMP_BUF_SIZE - req.avail_out != dtemplate[i].outlen) {
                        pr_err("alg: comp: Decompression test %d failed for "
@@ -1136,6 +1152,13 @@ static int test_pcomp(struct crypto_pcomp *tfm,
                        return -EINVAL;
                }
 
+               if (produced != dtemplate[i].outlen) {
+                       pr_err("alg: comp: Decompression test %d failed for "
+                              "%s: returned len = %u (expected %d)\n", i + 1,
+                              algo, produced, dtemplate[i].outlen);
+                       return -EINVAL;
+               }
+
                if (memcmp(result, dtemplate[i].output, dtemplate[i].outlen)) {
                        pr_err("alg: pcomp: Decompression test %d failed for "
                               "%s\n", i + 1, algo);

diff --git a/crypto/zlib.c b/crypto/zlib.c
index 33609ba..c301573 100644 (file)
--- a/crypto/zlib.c
+++ b/crypto/zlib.c
@@ -165,15 +165,15 @@ static int zlib_compress_update(struct crypto_pcomp *tfm,
                return -EINVAL;
        }
 
+       ret = req->avail_out - stream->avail_out;
        pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
                 stream->avail_in, stream->avail_out,
-                req->avail_in - stream->avail_in,
-                req->avail_out - stream->avail_out);
+                req->avail_in - stream->avail_in, ret);
        req->next_in = stream->next_in;
        req->avail_in = stream->avail_in;
        req->next_out = stream->next_out;
        req->avail_out = stream->avail_out;
-       return 0;
+       return ret;
 }
 
 static int zlib_compress_final(struct crypto_pcomp *tfm,
@@ -195,15 +195,15 @@ static int zlib_compress_final(struct crypto_pcomp *tfm,
                return -EINVAL;
        }
 
+       ret = req->avail_out - stream->avail_out;
        pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
                 stream->avail_in, stream->avail_out,
-                req->avail_in - stream->avail_in,
-                req->avail_out - stream->avail_out);
+                req->avail_in - stream->avail_in, ret);
        req->next_in = stream->next_in;
        req->avail_in = stream->avail_in;
        req->next_out = stream->next_out;
        req->avail_out = stream->avail_out;
-       return 0;
+       return ret;
 }
 
 
@@ -280,15 +280,15 @@ static int zlib_decompress_update(struct crypto_pcomp *tfm,
                return -EINVAL;
        }
 
+       ret = req->avail_out - stream->avail_out;
        pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
                 stream->avail_in, stream->avail_out,
-                req->avail_in - stream->avail_in,
-                req->avail_out - stream->avail_out);
+                req->avail_in - stream->avail_in, ret);
        req->next_in = stream->next_in;
        req->avail_in = stream->avail_in;
        req->next_out = stream->next_out;
        req->avail_out = stream->avail_out;
-       return 0;
+       return ret;
 }
 
 static int zlib_decompress_final(struct crypto_pcomp *tfm,
@@ -328,15 +328,15 @@ static int zlib_decompress_final(struct crypto_pcomp *tfm,
                return -EINVAL;
        }
 
+       ret = req->avail_out - stream->avail_out;
        pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
                 stream->avail_in, stream->avail_out,
-                req->avail_in - stream->avail_in,
-                req->avail_out - stream->avail_out);
+                req->avail_in - stream->avail_in, ret);
        req->next_in = stream->next_in;
        req->avail_in = stream->avail_in;
        req->next_out = stream->next_out;
        req->avail_out = stream->avail_out;
-       return 0;
+       return ret;
 }