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nbd: Drop unused offset parameter 

Now that NBD relies on the block layer to fragment things, we no
longer need to track an offset argument for which fragment of
a request we are actually servicing.

While at it, use true and false instead of 0 and 1 for a bool
parameter.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1468607524-19021-6-git-send-email-eblake@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Eric Blake 2016-07-15 12:32:03 -06:00 committed by Stefan Hajnoczi
parent fb1a6de14a
commit 1e2a77a851
4 changed files with 19 additions and 22 deletions
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31
block/nbd-client.c
View File

@ -116,7 +116,7 @@ static void nbd_restart_write(void *opaque)
static int nbd_co_send_request(BlockDriverState *bs,
struct nbd_request *request,
QEMUIOVector *qiov, int offset)
QEMUIOVector *qiov)
{
NbdClientSession *s = nbd_get_client_session(bs);
AioContext *aio_context;
@ -149,8 +149,8 @@ static int nbd_co_send_request(BlockDriverState *bs,
qio_channel_set_cork(s->ioc, true);
rc = nbd_send_request(s->ioc, request);
if (rc >= 0) {
ret = nbd_wr_syncv(s->ioc, qiov->iov, qiov->niov,
offset, request->len, 0);
ret = nbd_wr_syncv(s->ioc, qiov->iov, qiov->niov, request->len,
false);
if (ret != request->len) {
rc = -EIO;
}
@ -167,8 +167,9 @@ static int nbd_co_send_request(BlockDriverState *bs,
}
static void nbd_co_receive_reply(NbdClientSession *s,
struct nbd_request *request, struct nbd_reply *reply,
QEMUIOVector *qiov, int offset)
struct nbd_request *request,
struct nbd_reply *reply,
QEMUIOVector *qiov)
{
int ret;
@ -181,8 +182,8 @@ static void nbd_co_receive_reply(NbdClientSession *s,
reply->error = EIO;
} else {
if (qiov && reply->error == 0) {
ret = nbd_wr_syncv(s->ioc, qiov->iov, qiov->niov,
offset, request->len, 1);
ret = nbd_wr_syncv(s->ioc, qiov->iov, qiov->niov, request->len,
true);
if (ret != request->len) {
reply->error = EIO;
}
@ -230,11 +231,11 @@ int nbd_client_co_readv(BlockDriverState *bs, int64_t sector_num,
request.len = nb_sectors * 512;
nbd_coroutine_start(client, &request);
ret = nbd_co_send_request(bs, &request, NULL, 0);
ret = nbd_co_send_request(bs, &request, NULL);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(client, &request, &reply, qiov, 0);
nbd_co_receive_reply(client, &request, &reply, qiov);
}
nbd_coroutine_end(client, &request);
return -reply.error;
@ -259,11 +260,11 @@ int nbd_client_co_writev(BlockDriverState *bs, int64_t sector_num,
request.len = nb_sectors * 512;
nbd_coroutine_start(client, &request);
ret = nbd_co_send_request(bs, &request, qiov, 0);
ret = nbd_co_send_request(bs, &request, qiov);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(client, &request, &reply, NULL, 0);
nbd_co_receive_reply(client, &request, &reply, NULL);
}
nbd_coroutine_end(client, &request);
return -reply.error;
@ -284,11 +285,11 @@ int nbd_client_co_flush(BlockDriverState *bs)
request.len = 0;
nbd_coroutine_start(client, &request);
ret = nbd_co_send_request(bs, &request, NULL, 0);
ret = nbd_co_send_request(bs, &request, NULL);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(client, &request, &reply, NULL, 0);
nbd_co_receive_reply(client, &request, &reply, NULL);
}
nbd_coroutine_end(client, &request);
return -reply.error;
@ -309,11 +310,11 @@ int nbd_client_co_discard(BlockDriverState *bs, int64_t sector_num,
request.len = nb_sectors * 512;
nbd_coroutine_start(client, &request);
ret = nbd_co_send_request(bs, &request, NULL, 0);
ret = nbd_co_send_request(bs, &request, NULL);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(client, &request, &reply, NULL, 0);
nbd_co_receive_reply(client, &request, &reply, NULL);
}
nbd_coroutine_end(client, &request);
return -reply.error;

1
include/block/nbd.h
View File

@ -89,7 +89,6 @@ enum {
ssize_t nbd_wr_syncv(QIOChannel *ioc,
struct iovec *iov,
size_t niov,
size_t offset,
size_t length,
bool do_read);
int nbd_receive_negotiate(QIOChannel *ioc, const char *name, uint32_t *flags,

5
nbd/common.c
View File

@ -23,7 +23,6 @@
ssize_t nbd_wr_syncv(QIOChannel *ioc,
struct iovec *iov,
size_t niov,
size_t offset,
size_t length,
bool do_read)
{
@ -33,9 +32,7 @@ ssize_t nbd_wr_syncv(QIOChannel *ioc,
struct iovec *local_iov_head = local_iov;
unsigned int nlocal_iov = niov;
nlocal_iov = iov_copy(local_iov, nlocal_iov,
iov, niov,
offset, length);
nlocal_iov = iov_copy(local_iov, nlocal_iov, iov, niov, 0, length);
while (nlocal_iov > 0) {
ssize_t len;

4
nbd/nbd-internal.h
View File

@ -101,14 +101,14 @@ static inline ssize_t read_sync(QIOChannel *ioc, void *buffer, size_t size)
* our request/reply. Synchronization is done with recv_coroutine, so
* that this is coroutine-safe.
*/
return nbd_wr_syncv(ioc, &iov, 1, 0, size, true);
return nbd_wr_syncv(ioc, &iov, 1, size, true);
}
static inline ssize_t write_sync(QIOChannel *ioc, void *buffer, size_t size)
{
struct iovec iov = { .iov_base = buffer, .iov_len = size };
return nbd_wr_syncv(ioc, &iov, 1, 0, size, false);
return nbd_wr_syncv(ioc, &iov, 1, size, false);
}
struct NBDTLSHandshakeData {