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vmci: propagate msghdr all way down to __qp_memcpy_from_queue() 

... and switch it to memcpy_to_msg()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-11-24 19:32:50 -05:00
parent 56c39fb67c
commit d838df2e5d
3 changed files with 14 additions and 12 deletions
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17
drivers/misc/vmw_vmci/vmci_queue_pair.c
View File

@ -27,6 +27,7 @@
#include <linux/uio.h>
#include <linux/wait.h>
#include <linux/vmalloc.h>
#include <linux/skbuff.h>
#include "vmci_handle_array.h"
#include "vmci_queue_pair.h"
@ -429,11 +430,11 @@ static int __qp_memcpy_from_queue(void *dest,
to_copy = size - bytes_copied;
if (is_iovec) {
struct iovec *iov = (struct iovec *)dest;
struct msghdr *msg = dest;
int err;
/* The iovec will track bytes_copied internally. */
err = memcpy_toiovec(iov, (u8 *)va + page_offset,
err = memcpy_to_msg(msg, (u8 *)va + page_offset,
to_copy);
if (err != 0) {
if (kernel_if->host)
@ -3264,13 +3265,13 @@ EXPORT_SYMBOL_GPL(vmci_qpair_enquev);
* of bytes dequeued or < 0 on error.
*/
ssize_t vmci_qpair_dequev(struct vmci_qp *qpair,
void *iov,
struct msghdr *msg,
size_t iov_size,
int buf_type)
{
ssize_t result;
if (!qpair || !iov)
if (!qpair)
return VMCI_ERROR_INVALID_ARGS;
qp_lock(qpair);
@ -3279,7 +3280,7 @@ ssize_t vmci_qpair_dequev(struct vmci_qp *qpair,
result = qp_dequeue_locked(qpair->produce_q,
qpair->consume_q,
qpair->consume_q_size,
iov, iov_size,
msg, iov_size,
qp_memcpy_from_queue_iov,
true);
@ -3308,13 +3309,13 @@ EXPORT_SYMBOL_GPL(vmci_qpair_dequev);
* of bytes peeked or < 0 on error.
*/
ssize_t vmci_qpair_peekv(struct vmci_qp *qpair,
void *iov,
struct msghdr *msg,
size_t iov_size,
int buf_type)
{
ssize_t result;
if (!qpair || !iov)
if (!qpair)
return VMCI_ERROR_INVALID_ARGS;
qp_lock(qpair);
@ -3323,7 +3324,7 @@ ssize_t vmci_qpair_peekv(struct vmci_qp *qpair,
result = qp_dequeue_locked(qpair->produce_q,
qpair->consume_q,
qpair->consume_q_size,
iov, iov_size,
msg, iov_size,
qp_memcpy_from_queue_iov,
false);

5
include/linux/vmw_vmci_api.h
View File

@ -24,6 +24,7 @@
#define VMCI_KERNEL_API_VERSION_2 2
#define VMCI_KERNEL_API_VERSION VMCI_KERNEL_API_VERSION_2
struct msghdr;
typedef void (vmci_device_shutdown_fn) (void *device_registration,
void *user_data);
@ -75,8 +76,8 @@ ssize_t vmci_qpair_peek(struct vmci_qp *qpair, void *buf, size_t buf_size,
ssize_t vmci_qpair_enquev(struct vmci_qp *qpair,
void *iov, size_t iov_size, int mode);
ssize_t vmci_qpair_dequev(struct vmci_qp *qpair,
void *iov, size_t iov_size, int mode);
ssize_t vmci_qpair_peekv(struct vmci_qp *qpair, void *iov, size_t iov_size,
struct msghdr *msg, size_t iov_size, int mode);
ssize_t vmci_qpair_peekv(struct vmci_qp *qpair, struct msghdr *msg, size_t iov_size,
int mode);
#endif /* !__VMW_VMCI_API_H__ */

4
net/vmw_vsock/vmci_transport.c
View File

@ -1840,9 +1840,9 @@ static ssize_t vmci_transport_stream_dequeue(
int flags)
{
if (flags & MSG_PEEK)
return vmci_qpair_peekv(vmci_trans(vsk)->qpair, msg->msg_iov, len, 0);
return vmci_qpair_peekv(vmci_trans(vsk)->qpair, msg, len, 0);
else
return vmci_qpair_dequev(vmci_trans(vsk)->qpair, msg->msg_iov, len, 0);
return vmci_qpair_dequev(vmci_trans(vsk)->qpair, msg, len, 0);
}
static ssize_t vmci_transport_stream_enqueue(