From: "Philippe Mathieu-Daudé" <philmd@linaro.org>
To: qemu-devel@nongnu.org
Cc: "Daniel P. Berrangé" <berrange@redhat.com>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>
Subject: [PATCH] io/channel: Have read/write functions take void * buffer argument
Date: Fri, 31 Oct 2025 10:13:51 +0100 [thread overview]
Message-ID: <20251031091351.27625-1-philmd@linaro.org> (raw)
I/O channel read/write functions can operate on any area of
memory, regardless of the content their represent. Do not
restrict to array of char, use the void* type, which is also
the type of the underlying iovec::iov_base field.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
include/crypto/tlssession.h | 4 ++--
include/io/channel.h | 14 +++++++-------
io/channel-tls.c | 4 ++--
io/channel.c | 14 +++++++-------
4 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/include/crypto/tlssession.h b/include/crypto/tlssession.h
index 2e9fe11cf6e..28e419681e4 100644
--- a/include/crypto/tlssession.h
+++ b/include/crypto/tlssession.h
@@ -199,11 +199,11 @@ int qcrypto_tls_session_check_credentials(QCryptoTLSSession *sess,
* These must return QCRYPTO_TLS_SESSION_ERR_BLOCK if the I/O
* would block, but on other errors, must fill 'errp'
*/
-typedef ssize_t (*QCryptoTLSSessionWriteFunc)(const char *buf,
+typedef ssize_t (*QCryptoTLSSessionWriteFunc)(const void *buf,
size_t len,
void *opaque,
Error **errp);
-typedef ssize_t (*QCryptoTLSSessionReadFunc)(char *buf,
+typedef ssize_t (*QCryptoTLSSessionReadFunc)(void *buf,
size_t len,
void *opaque,
Error **errp);
diff --git a/include/io/channel.h b/include/io/channel.h
index 0f25ae0069f..db893a36288 100644
--- a/include/io/channel.h
+++ b/include/io/channel.h
@@ -437,7 +437,7 @@ ssize_t qio_channel_writev(QIOChannel *ioc,
* a single memory region.
*/
ssize_t qio_channel_read(QIOChannel *ioc,
- char *buf,
+ void *buf,
size_t buflen,
Error **errp);
@@ -453,7 +453,7 @@ ssize_t qio_channel_read(QIOChannel *ioc,
* single memory region.
*/
ssize_t qio_channel_write(QIOChannel *ioc,
- const char *buf,
+ const void *buf,
size_t buflen,
Error **errp);
@@ -475,7 +475,7 @@ ssize_t qio_channel_write(QIOChannel *ioc,
* without data, or -1 on error
*/
int coroutine_mixed_fn qio_channel_read_all_eof(QIOChannel *ioc,
- char *buf,
+ void *buf,
size_t buflen,
Error **errp);
@@ -495,7 +495,7 @@ int coroutine_mixed_fn qio_channel_read_all_eof(QIOChannel *ioc,
* Returns: 0 if all bytes were read, or -1 on error
*/
int coroutine_mixed_fn qio_channel_read_all(QIOChannel *ioc,
- char *buf,
+ void *buf,
size_t buflen,
Error **errp);
@@ -514,7 +514,7 @@ int coroutine_mixed_fn qio_channel_read_all(QIOChannel *ioc,
* Returns: 0 if all bytes were written, or -1 on error
*/
int coroutine_mixed_fn qio_channel_write_all(QIOChannel *ioc,
- const char *buf,
+ const void *buf,
size_t buflen,
Error **errp);
@@ -595,7 +595,7 @@ ssize_t qio_channel_pwritev(QIOChannel *ioc, const struct iovec *iov,
* flag QIO_CHANNEL_FEATURE_SEEKABLE prior to calling this method.
*
*/
-ssize_t qio_channel_pwrite(QIOChannel *ioc, char *buf, size_t buflen,
+ssize_t qio_channel_pwrite(QIOChannel *ioc, void *buf, size_t buflen,
off_t offset, Error **errp);
/**
@@ -631,7 +631,7 @@ ssize_t qio_channel_preadv(QIOChannel *ioc, const struct iovec *iov,
* flag QIO_CHANNEL_FEATURE_SEEKABLE prior to calling this method.
*
*/
-ssize_t qio_channel_pread(QIOChannel *ioc, char *buf, size_t buflen,
+ssize_t qio_channel_pread(QIOChannel *ioc, void *buf, size_t buflen,
off_t offset, Error **errp);
/**
diff --git a/io/channel-tls.c b/io/channel-tls.c
index ce041795c19..b0cec27cb9c 100644
--- a/io/channel-tls.c
+++ b/io/channel-tls.c
@@ -26,7 +26,7 @@
#include "qemu/atomic.h"
-static ssize_t qio_channel_tls_write_handler(const char *buf,
+static ssize_t qio_channel_tls_write_handler(const void *buf,
size_t len,
void *opaque,
Error **errp)
@@ -43,7 +43,7 @@ static ssize_t qio_channel_tls_write_handler(const char *buf,
return ret;
}
-static ssize_t qio_channel_tls_read_handler(char *buf,
+static ssize_t qio_channel_tls_read_handler(void *buf,
size_t len,
void *opaque,
Error **errp)
diff --git a/io/channel.c b/io/channel.c
index 852e684938c..8e8bd2efa84 100644
--- a/io/channel.c
+++ b/io/channel.c
@@ -310,7 +310,7 @@ ssize_t qio_channel_writev(QIOChannel *ioc,
ssize_t qio_channel_read(QIOChannel *ioc,
- char *buf,
+ void *buf,
size_t buflen,
Error **errp)
{
@@ -320,7 +320,7 @@ ssize_t qio_channel_read(QIOChannel *ioc,
ssize_t qio_channel_write(QIOChannel *ioc,
- const char *buf,
+ const void *buf,
size_t buflen,
Error **errp)
{
@@ -330,7 +330,7 @@ ssize_t qio_channel_write(QIOChannel *ioc,
int coroutine_mixed_fn qio_channel_read_all_eof(QIOChannel *ioc,
- char *buf,
+ void *buf,
size_t buflen,
Error **errp)
{
@@ -340,7 +340,7 @@ int coroutine_mixed_fn qio_channel_read_all_eof(QIOChannel *ioc,
int coroutine_mixed_fn qio_channel_read_all(QIOChannel *ioc,
- char *buf,
+ void *buf,
size_t buflen,
Error **errp)
{
@@ -350,7 +350,7 @@ int coroutine_mixed_fn qio_channel_read_all(QIOChannel *ioc,
int coroutine_mixed_fn qio_channel_write_all(QIOChannel *ioc,
- const char *buf,
+ const void *buf,
size_t buflen,
Error **errp)
{
@@ -475,7 +475,7 @@ ssize_t qio_channel_pwritev(QIOChannel *ioc, const struct iovec *iov,
return klass->io_pwritev(ioc, iov, niov, offset, errp);
}
-ssize_t qio_channel_pwrite(QIOChannel *ioc, char *buf, size_t buflen,
+ssize_t qio_channel_pwrite(QIOChannel *ioc, void *buf, size_t buflen,
off_t offset, Error **errp)
{
struct iovec iov = {
@@ -504,7 +504,7 @@ ssize_t qio_channel_preadv(QIOChannel *ioc, const struct iovec *iov,
return klass->io_preadv(ioc, iov, niov, offset, errp);
}
-ssize_t qio_channel_pread(QIOChannel *ioc, char *buf, size_t buflen,
+ssize_t qio_channel_pread(QIOChannel *ioc, void *buf, size_t buflen,
off_t offset, Error **errp)
{
struct iovec iov = {
--
2.51.0
next reply other threads:[~2025-10-31 9:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-31 9:13 Philippe Mathieu-Daudé [this message]
2025-10-31 11:40 ` [PATCH] io/channel: Have read/write functions take void * buffer argument Daniel P. Berrangé
2025-10-31 13:53 ` Daniel P. Berrangé
2025-10-31 13:55 ` Philippe Mathieu-Daudé
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