From 757dda54b43867936012970a1b457f3d16e7398d Mon Sep 17 00:00:00 2001 From: Alberto Faria Date: Thu, 9 Jun 2022 16:27:38 +0100 Subject: [PATCH] crypto: Make block callbacks return 0 on success They currently return the value of their headerlen/buflen parameter on success. Returning 0 instead makes it clear that short reads/writes are not possible. Signed-off-by: Alberto Faria Reviewed-by: Eric Blake Reviewed-by: Stefan Hajnoczi Message-Id: <20220609152744.3891847-5-afaria@redhat.com> Reviewed-by: Hanna Reitz Signed-off-by: Hanna Reitz --- block/crypto.c | 52 +++++++++++++++++----------------- block/qcow2.c | 22 +++++++------- crypto/block-luks.c | 8 +++--- crypto/block.c | 6 ++-- include/crypto/block.h | 32 ++++++++++----------- tests/unit/test-crypto-block.c | 38 ++++++++++++------------- 6 files changed, 79 insertions(+), 79 deletions(-) diff --git a/block/crypto.c b/block/crypto.c index e7f5c4e31a..11c3ddbc73 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -55,12 +55,12 @@ static int block_crypto_probe_generic(QCryptoBlockFormat format, } -static ssize_t block_crypto_read_func(QCryptoBlock *block, - size_t offset, - uint8_t *buf, - size_t buflen, - void *opaque, - Error **errp) +static int block_crypto_read_func(QCryptoBlock *block, + size_t offset, + uint8_t *buf, + size_t buflen, + void *opaque, + Error **errp) { BlockDriverState *bs = opaque; ssize_t ret; @@ -70,15 +70,15 @@ static ssize_t block_crypto_read_func(QCryptoBlock *block, error_setg_errno(errp, -ret, "Could not read encryption header"); return ret; } - return buflen; + return 0; } -static ssize_t block_crypto_write_func(QCryptoBlock *block, - size_t offset, - const uint8_t *buf, - size_t buflen, - void *opaque, - Error **errp) +static int block_crypto_write_func(QCryptoBlock *block, + size_t offset, + const uint8_t *buf, + size_t buflen, + void *opaque, + Error **errp) { BlockDriverState *bs = opaque; ssize_t ret; @@ -88,7 +88,7 @@ static ssize_t block_crypto_write_func(QCryptoBlock *block, error_setg_errno(errp, -ret, "Could not write encryption header"); return ret; } - return buflen; + return 0; } @@ -99,12 +99,12 @@ struct BlockCryptoCreateData { }; -static ssize_t block_crypto_create_write_func(QCryptoBlock *block, - size_t offset, - const uint8_t *buf, - size_t buflen, - void *opaque, - Error **errp) +static int block_crypto_create_write_func(QCryptoBlock *block, + size_t offset, + const uint8_t *buf, + size_t buflen, + void *opaque, + Error **errp) { struct BlockCryptoCreateData *data = opaque; ssize_t ret; @@ -114,13 +114,13 @@ static ssize_t block_crypto_create_write_func(QCryptoBlock *block, error_setg_errno(errp, -ret, "Could not write encryption header"); return ret; } - return ret; + return 0; } -static ssize_t block_crypto_create_init_func(QCryptoBlock *block, - size_t headerlen, - void *opaque, - Error **errp) +static int block_crypto_create_init_func(QCryptoBlock *block, + size_t headerlen, + void *opaque, + Error **errp) { struct BlockCryptoCreateData *data = opaque; Error *local_error = NULL; @@ -139,7 +139,7 @@ static ssize_t block_crypto_create_init_func(QCryptoBlock *block, data->prealloc, 0, &local_error); if (ret >= 0) { - return ret; + return 0; } error: diff --git a/block/qcow2.c b/block/qcow2.c index d5a1e8bc43..c43238a006 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -94,9 +94,9 @@ static int qcow2_probe(const uint8_t *buf, int buf_size, const char *filename) } -static ssize_t qcow2_crypto_hdr_read_func(QCryptoBlock *block, size_t offset, - uint8_t *buf, size_t buflen, - void *opaque, Error **errp) +static int qcow2_crypto_hdr_read_func(QCryptoBlock *block, size_t offset, + uint8_t *buf, size_t buflen, + void *opaque, Error **errp) { BlockDriverState *bs = opaque; BDRVQcow2State *s = bs->opaque; @@ -113,12 +113,12 @@ static ssize_t qcow2_crypto_hdr_read_func(QCryptoBlock *block, size_t offset, error_setg_errno(errp, -ret, "Could not read encryption header"); return -1; } - return buflen; + return 0; } -static ssize_t qcow2_crypto_hdr_init_func(QCryptoBlock *block, size_t headerlen, - void *opaque, Error **errp) +static int qcow2_crypto_hdr_init_func(QCryptoBlock *block, size_t headerlen, + void *opaque, Error **errp) { BlockDriverState *bs = opaque; BDRVQcow2State *s = bs->opaque; @@ -151,13 +151,13 @@ static ssize_t qcow2_crypto_hdr_init_func(QCryptoBlock *block, size_t headerlen, return -1; } - return ret; + return 0; } -static ssize_t qcow2_crypto_hdr_write_func(QCryptoBlock *block, size_t offset, - const uint8_t *buf, size_t buflen, - void *opaque, Error **errp) +static int qcow2_crypto_hdr_write_func(QCryptoBlock *block, size_t offset, + const uint8_t *buf, size_t buflen, + void *opaque, Error **errp) { BlockDriverState *bs = opaque; BDRVQcow2State *s = bs->opaque; @@ -174,7 +174,7 @@ static ssize_t qcow2_crypto_hdr_write_func(QCryptoBlock *block, size_t offset, error_setg_errno(errp, -ret, "Could not read encryption header"); return -1; } - return buflen; + return 0; } static QDict* diff --git a/crypto/block-luks.c b/crypto/block-luks.c index fe8f04ffb2..f62be6836b 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -495,7 +495,7 @@ qcrypto_block_luks_load_header(QCryptoBlock *block, void *opaque, Error **errp) { - ssize_t rv; + int rv; size_t i; QCryptoBlockLUKS *luks = block->opaque; @@ -856,7 +856,7 @@ qcrypto_block_luks_store_key(QCryptoBlock *block, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, splitkey, splitkeylen, opaque, - errp) != splitkeylen) { + errp) < 0) { goto cleanup; } @@ -903,7 +903,7 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, g_autofree uint8_t *splitkey = NULL; size_t splitkeylen; g_autofree uint8_t *possiblekey = NULL; - ssize_t rv; + int rv; g_autoptr(QCryptoCipher) cipher = NULL; uint8_t keydigest[QCRYPTO_BLOCK_LUKS_DIGEST_LEN]; g_autoptr(QCryptoIVGen) ivgen = NULL; @@ -1193,7 +1193,7 @@ qcrypto_block_luks_erase_key(QCryptoBlock *block, garbagesplitkey, splitkeylen, opaque, - &local_err) != splitkeylen) { + &local_err) < 0) { error_propagate(errp, local_err); return -1; } diff --git a/crypto/block.c b/crypto/block.c index eb057948b5..7bb4b74a37 100644 --- a/crypto/block.c +++ b/crypto/block.c @@ -115,7 +115,7 @@ QCryptoBlock *qcrypto_block_create(QCryptoBlockCreateOptions *options, } -static ssize_t qcrypto_block_headerlen_hdr_init_func(QCryptoBlock *block, +static int qcrypto_block_headerlen_hdr_init_func(QCryptoBlock *block, size_t headerlen, void *opaque, Error **errp) { size_t *headerlenp = opaque; @@ -126,12 +126,12 @@ static ssize_t qcrypto_block_headerlen_hdr_init_func(QCryptoBlock *block, } -static ssize_t qcrypto_block_headerlen_hdr_write_func(QCryptoBlock *block, +static int qcrypto_block_headerlen_hdr_write_func(QCryptoBlock *block, size_t offset, const uint8_t *buf, size_t buflen, void *opaque, Error **errp) { /* Discard the bytes, we're not actually writing to an image */ - return buflen; + return 0; } diff --git a/include/crypto/block.h b/include/crypto/block.h index 7a65e8e402..4f63a37872 100644 --- a/include/crypto/block.h +++ b/include/crypto/block.h @@ -29,24 +29,24 @@ typedef struct QCryptoBlock QCryptoBlock; /* See also QCryptoBlockFormat, QCryptoBlockCreateOptions * and QCryptoBlockOpenOptions in qapi/crypto.json */ -typedef ssize_t (*QCryptoBlockReadFunc)(QCryptoBlock *block, - size_t offset, - uint8_t *buf, - size_t buflen, - void *opaque, - Error **errp); +typedef int (*QCryptoBlockReadFunc)(QCryptoBlock *block, + size_t offset, + uint8_t *buf, + size_t buflen, + void *opaque, + Error **errp); -typedef ssize_t (*QCryptoBlockInitFunc)(QCryptoBlock *block, - size_t headerlen, - void *opaque, - Error **errp); +typedef int (*QCryptoBlockInitFunc)(QCryptoBlock *block, + size_t headerlen, + void *opaque, + Error **errp); -typedef ssize_t (*QCryptoBlockWriteFunc)(QCryptoBlock *block, - size_t offset, - const uint8_t *buf, - size_t buflen, - void *opaque, - Error **errp); +typedef int (*QCryptoBlockWriteFunc)(QCryptoBlock *block, + size_t offset, + const uint8_t *buf, + size_t buflen, + void *opaque, + Error **errp); /** * qcrypto_block_has_format: diff --git a/tests/unit/test-crypto-block.c b/tests/unit/test-crypto-block.c index 3b1f0d509f..3417b67be5 100644 --- a/tests/unit/test-crypto-block.c +++ b/tests/unit/test-crypto-block.c @@ -188,12 +188,12 @@ static struct QCryptoBlockTestData { }; -static ssize_t test_block_read_func(QCryptoBlock *block, - size_t offset, - uint8_t *buf, - size_t buflen, - void *opaque, - Error **errp) +static int test_block_read_func(QCryptoBlock *block, + size_t offset, + uint8_t *buf, + size_t buflen, + void *opaque, + Error **errp) { Buffer *header = opaque; @@ -201,14 +201,14 @@ static ssize_t test_block_read_func(QCryptoBlock *block, memcpy(buf, header->buffer + offset, buflen); - return buflen; + return 0; } -static ssize_t test_block_init_func(QCryptoBlock *block, - size_t headerlen, - void *opaque, - Error **errp) +static int test_block_init_func(QCryptoBlock *block, + size_t headerlen, + void *opaque, + Error **errp) { Buffer *header = opaque; @@ -216,16 +216,16 @@ static ssize_t test_block_init_func(QCryptoBlock *block, buffer_reserve(header, headerlen); - return headerlen; + return 0; } -static ssize_t test_block_write_func(QCryptoBlock *block, - size_t offset, - const uint8_t *buf, - size_t buflen, - void *opaque, - Error **errp) +static int test_block_write_func(QCryptoBlock *block, + size_t offset, + const uint8_t *buf, + size_t buflen, + void *opaque, + Error **errp) { Buffer *header = opaque; @@ -234,7 +234,7 @@ static ssize_t test_block_write_func(QCryptoBlock *block, memcpy(header->buffer + offset, buf, buflen); header->offset = offset + buflen; - return buflen; + return 0; }