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Collection of little cleanups anf bugfixes.

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nbd patches in preparation of spice-nbd.
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Merge remote-tracking branch 'spice/tags/pull-spice-1' into staging

Collection of little cleanups anf bugfixes.
nbd patches in preparation of spice-nbd.

# gpg: Signature made Mon 16 Dec 2013 01:27:45 AM PST using RSA key ID D3E87138
# gpg: Can't check signature: public key not found

# By Marc-André Lureau (12) and Gerd Hoffmann (4)
# Via Gerd Hoffmann
* spice/tags/pull-spice-1:
  spice: stop server for qxl hard reset
  spice: move spice_server_vm_{start,stop} calls into qemu_spice_display_*()
  spice: move qemu_spice_display_*() from spice-graphics to spice-core
  nbd: avoid uninitialized warnings
  nbd: finish any pending coroutine
  nbd: make nbd_client_session_close() idempotent
  nbd: pass export name as init argument
  nbd: don't change socket block during negotiate
  Split nbd block client code
  spice-char: implement chardev port event
  char: add qemu_chr_fe_event()
  include: add missing config-host.h include
  qmp_change_blockdev() remove unused has_format
  spice-char: remove unused field
  vscclient: do not add a socket watch if there is not data to send
  spice: flip streaming video mode to off by default
This commit is contained in:
Anthony Liguori 2013-12-16 09:44:13 -08:00
commit b91f93243b
16 changed files with 537 additions and 377 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block/Makefile.objs
View File

@ -10,7 +10,7 @@ block-obj-$(CONFIG_POSIX) += raw-posix.o
block-obj-$(CONFIG_LINUX_AIO) += linux-aio.o
ifeq ($(CONFIG_POSIX),y)
block-obj-y += nbd.o sheepdog.o
block-obj-y += nbd.o nbd-client.o sheepdog.o
block-obj-$(CONFIG_LIBISCSI) += iscsi.o
block-obj-$(CONFIG_CURL) += curl.o
block-obj-$(CONFIG_RBD) += rbd.o

385
block/nbd-client.c Normal file
View File

@ -0,0 +1,385 @@
/*
* QEMU Block driver for NBD
*
* Copyright (C) 2008 Bull S.A.S.
* Author: Laurent Vivier <Laurent.Vivier@bull.net>
*
* Some parts:
* Copyright (C) 2007 Anthony Liguori <anthony@codemonkey.ws>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "nbd-client.h"
#include "qemu/sockets.h"
#define HANDLE_TO_INDEX(bs, handle) ((handle) ^ ((uint64_t)(intptr_t)bs))
#define INDEX_TO_HANDLE(bs, index) ((index) ^ ((uint64_t)(intptr_t)bs))
static void nbd_recv_coroutines_enter_all(NbdClientSession *s)
{
int i;
for (i = 0; i < MAX_NBD_REQUESTS; i++) {
if (s->recv_coroutine[i]) {
qemu_coroutine_enter(s->recv_coroutine[i], NULL);
}
}
}
static void nbd_reply_ready(void *opaque)
{
NbdClientSession *s = opaque;
uint64_t i;
int ret;
if (s->reply.handle == 0) {
/* No reply already in flight. Fetch a header. It is possible
* that another thread has done the same thing in parallel, so
* the socket is not readable anymore.
*/
ret = nbd_receive_reply(s->sock, &s->reply);
if (ret == -EAGAIN) {
return;
}
if (ret < 0) {
s->reply.handle = 0;
goto fail;
}
}
/* There's no need for a mutex on the receive side, because the
* handler acts as a synchronization point and ensures that only
* one coroutine is called until the reply finishes. */
i = HANDLE_TO_INDEX(s, s->reply.handle);
if (i >= MAX_NBD_REQUESTS) {
goto fail;
}
if (s->recv_coroutine[i]) {
qemu_coroutine_enter(s->recv_coroutine[i], NULL);
return;
}
fail:
nbd_recv_coroutines_enter_all(s);
}
static void nbd_restart_write(void *opaque)
{
NbdClientSession *s = opaque;
qemu_coroutine_enter(s->send_coroutine, NULL);
}
static int nbd_co_send_request(NbdClientSession *s,
struct nbd_request *request,
QEMUIOVector *qiov, int offset)
{
int rc, ret;
qemu_co_mutex_lock(&s->send_mutex);
s->send_coroutine = qemu_coroutine_self();
qemu_aio_set_fd_handler(s->sock, nbd_reply_ready, nbd_restart_write, s);
if (qiov) {
if (!s->is_unix) {
socket_set_cork(s->sock, 1);
}
rc = nbd_send_request(s->sock, request);
if (rc >= 0) {
ret = qemu_co_sendv(s->sock, qiov->iov, qiov->niov,
offset, request->len);
if (ret != request->len) {
rc = -EIO;
}
}
if (!s->is_unix) {
socket_set_cork(s->sock, 0);
}
} else {
rc = nbd_send_request(s->sock, request);
}
qemu_aio_set_fd_handler(s->sock, nbd_reply_ready, NULL, s);
s->send_coroutine = NULL;
qemu_co_mutex_unlock(&s->send_mutex);
return rc;
}
static void nbd_co_receive_reply(NbdClientSession *s,
struct nbd_request *request, struct nbd_reply *reply,
QEMUIOVector *qiov, int offset)
{
int ret;
/* Wait until we're woken up by the read handler. TODO: perhaps
* peek at the next reply and avoid yielding if it's ours? */
qemu_coroutine_yield();
*reply = s->reply;
if (reply->handle != request->handle) {
reply->error = EIO;
} else {
if (qiov && reply->error == 0) {
ret = qemu_co_recvv(s->sock, qiov->iov, qiov->niov,
offset, request->len);
if (ret != request->len) {
reply->error = EIO;
}
}
/* Tell the read handler to read another header. */
s->reply.handle = 0;
}
}
static void nbd_coroutine_start(NbdClientSession *s,
struct nbd_request *request)
{
int i;
/* Poor man semaphore. The free_sema is locked when no other request
* can be accepted, and unlocked after receiving one reply. */
if (s->in_flight >= MAX_NBD_REQUESTS - 1) {
qemu_co_mutex_lock(&s->free_sema);
assert(s->in_flight < MAX_NBD_REQUESTS);
}
s->in_flight++;
for (i = 0; i < MAX_NBD_REQUESTS; i++) {
if (s->recv_coroutine[i] == NULL) {
s->recv_coroutine[i] = qemu_coroutine_self();
break;
}
}
assert(i < MAX_NBD_REQUESTS);
request->handle = INDEX_TO_HANDLE(s, i);
}
static void nbd_coroutine_end(NbdClientSession *s,
struct nbd_request *request)
{
int i = HANDLE_TO_INDEX(s, request->handle);
s->recv_coroutine[i] = NULL;
if (s->in_flight-- == MAX_NBD_REQUESTS) {
qemu_co_mutex_unlock(&s->free_sema);
}
}
static int nbd_co_readv_1(NbdClientSession *client, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov,
int offset)
{
struct nbd_request request = { .type = NBD_CMD_READ };
struct nbd_reply reply;
ssize_t ret;
request.from = sector_num * 512;
request.len = nb_sectors * 512;
nbd_coroutine_start(client, &request);
ret = nbd_co_send_request(client, &request, NULL, 0);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(client, &request, &reply, qiov, offset);
}
nbd_coroutine_end(client, &request);
return -reply.error;
}
static int nbd_co_writev_1(NbdClientSession *client, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov,
int offset)
{
struct nbd_request request = { .type = NBD_CMD_WRITE };
struct nbd_reply reply;
ssize_t ret;
if (!bdrv_enable_write_cache(client->bs) &&
(client->nbdflags & NBD_FLAG_SEND_FUA)) {
request.type |= NBD_CMD_FLAG_FUA;
}
request.from = sector_num * 512;
request.len = nb_sectors * 512;
nbd_coroutine_start(client, &request);
ret = nbd_co_send_request(client, &request, qiov, offset);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(client, &request, &reply, NULL, 0);
}
nbd_coroutine_end(client, &request);
return -reply.error;
}
/* qemu-nbd has a limit of slightly less than 1M per request. Try to
* remain aligned to 4K. */
#define NBD_MAX_SECTORS 2040
int nbd_client_session_co_readv(NbdClientSession *client, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov)
{
int offset = 0;
int ret;
while (nb_sectors > NBD_MAX_SECTORS) {
ret = nbd_co_readv_1(client, sector_num,
NBD_MAX_SECTORS, qiov, offset);
if (ret < 0) {
return ret;
}
offset += NBD_MAX_SECTORS * 512;
sector_num += NBD_MAX_SECTORS;
nb_sectors -= NBD_MAX_SECTORS;
}
return nbd_co_readv_1(client, sector_num, nb_sectors, qiov, offset);
}
int nbd_client_session_co_writev(NbdClientSession *client, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov)
{
int offset = 0;
int ret;
while (nb_sectors > NBD_MAX_SECTORS) {
ret = nbd_co_writev_1(client, sector_num,
NBD_MAX_SECTORS, qiov, offset);
if (ret < 0) {
return ret;
}
offset += NBD_MAX_SECTORS * 512;
sector_num += NBD_MAX_SECTORS;
nb_sectors -= NBD_MAX_SECTORS;
}
return nbd_co_writev_1(client, sector_num, nb_sectors, qiov, offset);
}
int nbd_client_session_co_flush(NbdClientSession *client)
{
struct nbd_request request = { .type = NBD_CMD_FLUSH };
struct nbd_reply reply;
ssize_t ret;
if (!(client->nbdflags & NBD_FLAG_SEND_FLUSH)) {
return 0;
}
if (client->nbdflags & NBD_FLAG_SEND_FUA) {
request.type |= NBD_CMD_FLAG_FUA;
}
request.from = 0;
request.len = 0;
nbd_coroutine_start(client, &request);
ret = nbd_co_send_request(client, &request, NULL, 0);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(client, &request, &reply, NULL, 0);
}
nbd_coroutine_end(client, &request);
return -reply.error;
}
int nbd_client_session_co_discard(NbdClientSession *client, int64_t sector_num,
int nb_sectors)
{
struct nbd_request request = { .type = NBD_CMD_TRIM };
struct nbd_reply reply;
ssize_t ret;
if (!(client->nbdflags & NBD_FLAG_SEND_TRIM)) {
return 0;
}
request.from = sector_num * 512;
request.len = nb_sectors * 512;
nbd_coroutine_start(client, &request);
ret = nbd_co_send_request(client, &request, NULL, 0);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(client, &request, &reply, NULL, 0);
}
nbd_coroutine_end(client, &request);
return -reply.error;
}
static void nbd_teardown_connection(NbdClientSession *client)
{
struct nbd_request request = {
.type = NBD_CMD_DISC,
.from = 0,
.len = 0
};
nbd_send_request(client->sock, &request);
/* finish any pending coroutines */
shutdown(client->sock, 2);
nbd_recv_coroutines_enter_all(client);
qemu_aio_set_fd_handler(client->sock, NULL, NULL, NULL);
closesocket(client->sock);
client->sock = -1;
}
void nbd_client_session_close(NbdClientSession *client)
{
if (!client->bs) {
return;
}
nbd_teardown_connection(client);
client->bs = NULL;
}
int nbd_client_session_init(NbdClientSession *client, BlockDriverState *bs,
int sock, const char *export)
{
int ret;
/* NBD handshake */
logout("session init %s\n", export);
qemu_set_block(sock);
ret = nbd_receive_negotiate(sock, export,
&client->nbdflags, &client->size,
&client->blocksize);
if (ret < 0) {
logout("Failed to negotiate with the NBD server\n");
closesocket(sock);
return ret;
}
qemu_co_mutex_init(&client->send_mutex);
qemu_co_mutex_init(&client->free_sema);
client->bs = bs;
client->sock = sock;
/* Now that we're connected, set the socket to be non-blocking and
* kick the reply mechanism. */
qemu_set_nonblock(sock);
qemu_aio_set_fd_handler(sock, nbd_reply_ready, NULL, client);
logout("Established connection with NBD server\n");
return 0;
}

50
block/nbd-client.h Normal file
View File

@ -0,0 +1,50 @@
#ifndef NBD_CLIENT_H
#define NBD_CLIENT_H
#include "qemu-common.h"
#include "block/nbd.h"
#include "block/block_int.h"
/* #define DEBUG_NBD */
#if defined(DEBUG_NBD)
#define logout(fmt, ...) \
fprintf(stderr, "nbd\t%-24s" fmt, __func__, ##__VA_ARGS__)
#else
#define logout(fmt, ...) ((void)0)
#endif
#define MAX_NBD_REQUESTS 16
typedef struct NbdClientSession {
int sock;
uint32_t nbdflags;
off_t size;
size_t blocksize;
CoMutex send_mutex;
CoMutex free_sema;
Coroutine *send_coroutine;
int in_flight;
Coroutine *recv_coroutine[MAX_NBD_REQUESTS];
struct nbd_reply reply;
bool is_unix;
BlockDriverState *bs;
} NbdClientSession;
int nbd_client_session_init(NbdClientSession *client, BlockDriverState *bs,
int sock, const char *export_name);
void nbd_client_session_close(NbdClientSession *client);
int nbd_client_session_co_discard(NbdClientSession *client, int64_t sector_num,
int nb_sectors);
int nbd_client_session_co_flush(NbdClientSession *client);
int nbd_client_session_co_writev(NbdClientSession *client, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov);
int nbd_client_session_co_readv(NbdClientSession *client, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov);
#endif /* NBD_CLIENT_H */

380
block/nbd.c
View File

@ -26,8 +26,7 @@
* THE SOFTWARE.
*/
#include "qemu-common.h"
#include "block/nbd.h"
#include "block/nbd-client.h"
#include "qemu/uri.h"
#include "block/block_int.h"
#include "qemu/module.h"
@ -40,37 +39,9 @@
#define EN_OPTSTR ":exportname="
/* #define DEBUG_NBD */
#if defined(DEBUG_NBD)
#define logout(fmt, ...) \
fprintf(stderr, "nbd\t%-24s" fmt, __func__, ##__VA_ARGS__)
#else
#define logout(fmt, ...) ((void)0)
#endif
#define MAX_NBD_REQUESTS 16
#define HANDLE_TO_INDEX(bs, handle) ((handle) ^ ((uint64_t)(intptr_t)bs))
#define INDEX_TO_HANDLE(bs, index) ((index) ^ ((uint64_t)(intptr_t)bs))
typedef struct BDRVNBDState {
int sock;
uint32_t nbdflags;
off_t size;
size_t blocksize;
CoMutex send_mutex;
CoMutex free_sema;
Coroutine *send_coroutine;
int in_flight;
Coroutine *recv_coroutine[MAX_NBD_REQUESTS];
struct nbd_reply reply;
bool is_unix;
NbdClientSession client;
QemuOpts *socket_opts;
char *export_name; /* An NBD server may export several devices */
} BDRVNBDState;
static int nbd_parse_uri(const char *filename, QDict *options)
@ -217,7 +188,7 @@ out:
g_free(file);
}
static int nbd_config(BDRVNBDState *s, QDict *options)
static int nbd_config(BDRVNBDState *s, QDict *options, char **export)
{
Error *local_err = NULL;
@ -227,9 +198,9 @@ static int nbd_config(BDRVNBDState *s, QDict *options)
"be used at the same time.");
return -EINVAL;
}
s->is_unix = true;
s->client.is_unix = true;
} else if (qdict_haskey(options, "host")) {
s->is_unix = false;
s->client.is_unix = false;
} else {
return -EINVAL;
}
@ -247,162 +218,20 @@ static int nbd_config(BDRVNBDState *s, QDict *options)
qemu_opt_set_number(s->socket_opts, "port", NBD_DEFAULT_PORT);
}
s->export_name = g_strdup(qdict_get_try_str(options, "export"));
if (s->export_name) {
*export = g_strdup(qdict_get_try_str(options, "export"));
if (*export) {
qdict_del(options, "export");
}
return 0;
}
static void nbd_coroutine_start(BDRVNBDState *s, struct nbd_request *request)
{
int i;
/* Poor man semaphore. The free_sema is locked when no other request
* can be accepted, and unlocked after receiving one reply. */
if (s->in_flight >= MAX_NBD_REQUESTS - 1) {
qemu_co_mutex_lock(&s->free_sema);
assert(s->in_flight < MAX_NBD_REQUESTS);
}
s->in_flight++;
for (i = 0; i < MAX_NBD_REQUESTS; i++) {
if (s->recv_coroutine[i] == NULL) {
s->recv_coroutine[i] = qemu_coroutine_self();
break;
}
}
assert(i < MAX_NBD_REQUESTS);
request->handle = INDEX_TO_HANDLE(s, i);
}
static void nbd_reply_ready(void *opaque)
{
BDRVNBDState *s = opaque;
uint64_t i;
int ret;
if (s->reply.handle == 0) {
/* No reply already in flight. Fetch a header. It is possible
* that another thread has done the same thing in parallel, so
* the socket is not readable anymore.
*/
ret = nbd_receive_reply(s->sock, &s->reply);
if (ret == -EAGAIN) {
return;
}
if (ret < 0) {
s->reply.handle = 0;
goto fail;
}
}
/* There's no need for a mutex on the receive side, because the
* handler acts as a synchronization point and ensures that only
* one coroutine is called until the reply finishes. */
i = HANDLE_TO_INDEX(s, s->reply.handle);
if (i >= MAX_NBD_REQUESTS) {
goto fail;
}
if (s->recv_coroutine[i]) {
qemu_coroutine_enter(s->recv_coroutine[i], NULL);
return;
}
fail:
for (i = 0; i < MAX_NBD_REQUESTS; i++) {
if (s->recv_coroutine[i]) {
qemu_coroutine_enter(s->recv_coroutine[i], NULL);
}
}
}
static void nbd_restart_write(void *opaque)
{
BDRVNBDState *s = opaque;
qemu_coroutine_enter(s->send_coroutine, NULL);
}
static int nbd_co_send_request(BDRVNBDState *s, struct nbd_request *request,
QEMUIOVector *qiov, int offset)
{
int rc, ret;
qemu_co_mutex_lock(&s->send_mutex);
s->send_coroutine = qemu_coroutine_self();
qemu_aio_set_fd_handler(s->sock, nbd_reply_ready, nbd_restart_write, s);
if (qiov) {
if (!s->is_unix) {
socket_set_cork(s->sock, 1);
}
rc = nbd_send_request(s->sock, request);
if (rc >= 0) {
ret = qemu_co_sendv(s->sock, qiov->iov, qiov->niov,
offset, request->len);
if (ret != request->len) {
rc = -EIO;
}
}
if (!s->is_unix) {
socket_set_cork(s->sock, 0);
}
} else {
rc = nbd_send_request(s->sock, request);
}
qemu_aio_set_fd_handler(s->sock, nbd_reply_ready, NULL, s);
s->send_coroutine = NULL;
qemu_co_mutex_unlock(&s->send_mutex);
return rc;
}
static void nbd_co_receive_reply(BDRVNBDState *s, struct nbd_request *request,
struct nbd_reply *reply,
QEMUIOVector *qiov, int offset)
{
int ret;
/* Wait until we're woken up by the read handler. TODO: perhaps
* peek at the next reply and avoid yielding if it's ours? */
qemu_coroutine_yield();
*reply = s->reply;
if (reply->handle != request->handle) {
reply->error = EIO;
} else {
if (qiov && reply->error == 0) {
ret = qemu_co_recvv(s->sock, qiov->iov, qiov->niov,
offset, request->len);
if (ret != request->len) {
reply->error = EIO;
}
}
/* Tell the read handler to read another header. */
s->reply.handle = 0;
}
}
static void nbd_coroutine_end(BDRVNBDState *s, struct nbd_request *request)
{
int i = HANDLE_TO_INDEX(s, request->handle);
s->recv_coroutine[i] = NULL;
if (s->in_flight-- == MAX_NBD_REQUESTS) {
qemu_co_mutex_unlock(&s->free_sema);
}
}
static int nbd_establish_connection(BlockDriverState *bs)
{
BDRVNBDState *s = bs->opaque;
int sock;
int ret;
off_t size;
size_t blocksize;
if (s->is_unix) {
if (s->client.is_unix) {
sock = unix_socket_outgoing(qemu_opt_get(s->socket_opts, "path"));
} else {
sock = tcp_socket_outgoing_opts(s->socket_opts);
@ -417,53 +246,18 @@ static int nbd_establish_connection(BlockDriverState *bs)
return -errno;
}
/* NBD handshake */
ret = nbd_receive_negotiate(sock, s->export_name, &s->nbdflags, &size,
&blocksize);
if (ret < 0) {
logout("Failed to negotiate with the NBD server\n");
closesocket(sock);
return ret;
}
/* Now that we're connected, set the socket to be non-blocking and
* kick the reply mechanism. */
qemu_set_nonblock(sock);
qemu_aio_set_fd_handler(sock, nbd_reply_ready, NULL, s);
s->sock = sock;
s->size = size;
s->blocksize = blocksize;
logout("Established connection with NBD server\n");
return 0;
}
static void nbd_teardown_connection(BlockDriverState *bs)
{
BDRVNBDState *s = bs->opaque;
struct nbd_request request;
request.type = NBD_CMD_DISC;
request.from = 0;
request.len = 0;
nbd_send_request(s->sock, &request);
qemu_aio_set_fd_handler(s->sock, NULL, NULL, NULL);
closesocket(s->sock);
return sock;
}
static int nbd_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
BDRVNBDState *s = bs->opaque;
int result;
qemu_co_mutex_init(&s->send_mutex);
qemu_co_mutex_init(&s->free_sema);
char *export = NULL;
int result, sock;
/* Pop the config into our state object. Exit if invalid. */
result = nbd_config(s, options);
result = nbd_config(s, options, &export);
if (result != 0) {
return result;
}
@ -471,172 +265,64 @@ static int nbd_open(BlockDriverState *bs, QDict *options, int flags,
/* establish TCP connection, return error if it fails
* TODO: Configurable retry-until-timeout behaviour.
*/
result = nbd_establish_connection(bs);
sock = nbd_establish_connection(bs);
if (sock < 0) {
return sock;
}
/* NBD handshake */
result = nbd_client_session_init(&s->client, bs, sock, export);
g_free(export);
return result;
}
static int nbd_co_readv_1(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov,
int offset)
{
BDRVNBDState *s = bs->opaque;
struct nbd_request request;
struct nbd_reply reply;
ssize_t ret;
request.type = NBD_CMD_READ;
request.from = sector_num * 512;
request.len = nb_sectors * 512;
nbd_coroutine_start(s, &request);
ret = nbd_co_send_request(s, &request, NULL, 0);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(s, &request, &reply, qiov, offset);
}
nbd_coroutine_end(s, &request);
return -reply.error;
}
static int nbd_co_writev_1(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov,
int offset)
{
BDRVNBDState *s = bs->opaque;
struct nbd_request request;
struct nbd_reply reply;
ssize_t ret;
request.type = NBD_CMD_WRITE;
if (!bdrv_enable_write_cache(bs) && (s->nbdflags & NBD_FLAG_SEND_FUA)) {
request.type |= NBD_CMD_FLAG_FUA;
}
request.from = sector_num * 512;
request.len = nb_sectors * 512;
nbd_coroutine_start(s, &request);
ret = nbd_co_send_request(s, &request, qiov, offset);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(s, &request, &reply, NULL, 0);
}
nbd_coroutine_end(s, &request);
return -reply.error;
}
/* qemu-nbd has a limit of slightly less than 1M per request. Try to
* remain aligned to 4K. */
#define NBD_MAX_SECTORS 2040
static int nbd_co_readv(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov)
{
int offset = 0;
int ret;
while (nb_sectors > NBD_MAX_SECTORS) {
ret = nbd_co_readv_1(bs, sector_num, NBD_MAX_SECTORS, qiov, offset);
if (ret < 0) {
return ret;
}
offset += NBD_MAX_SECTORS * 512;
sector_num += NBD_MAX_SECTORS;
nb_sectors -= NBD_MAX_SECTORS;
}
return nbd_co_readv_1(bs, sector_num, nb_sectors, qiov, offset);
BDRVNBDState *s = bs->opaque;
return nbd_client_session_co_readv(&s->client, sector_num,
nb_sectors, qiov);
}
static int nbd_co_writev(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov)
{
int offset = 0;
int ret;
while (nb_sectors > NBD_MAX_SECTORS) {
ret = nbd_co_writev_1(bs, sector_num, NBD_MAX_SECTORS, qiov, offset);
if (ret < 0) {
return ret;
}
offset += NBD_MAX_SECTORS * 512;
sector_num += NBD_MAX_SECTORS;
nb_sectors -= NBD_MAX_SECTORS;
}
return nbd_co_writev_1(bs, sector_num, nb_sectors, qiov, offset);
BDRVNBDState *s = bs->opaque;
return nbd_client_session_co_writev(&s->client, sector_num,
nb_sectors, qiov);
}
static int nbd_co_flush(BlockDriverState *bs)
{
BDRVNBDState *s = bs->opaque;
struct nbd_request request;
struct nbd_reply reply;
ssize_t ret;
if (!(s->nbdflags & NBD_FLAG_SEND_FLUSH)) {
return 0;
}
request.type = NBD_CMD_FLUSH;
if (s->nbdflags & NBD_FLAG_SEND_FUA) {
request.type |= NBD_CMD_FLAG_FUA;
}
request.from = 0;
request.len = 0;
nbd_coroutine_start(s, &request);
ret = nbd_co_send_request(s, &request, NULL, 0);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(s, &request, &reply, NULL, 0);
}
nbd_coroutine_end(s, &request);
return -reply.error;
return nbd_client_session_co_flush(&s->client);
}
static int nbd_co_discard(BlockDriverState *bs, int64_t sector_num,
int nb_sectors)
{
BDRVNBDState *s = bs->opaque;
struct nbd_request request;
struct nbd_reply reply;
ssize_t ret;
if (!(s->nbdflags & NBD_FLAG_SEND_TRIM)) {
return 0;
}
request.type = NBD_CMD_TRIM;
request.from = sector_num * 512;
request.len = nb_sectors * 512;
nbd_coroutine_start(s, &request);
ret = nbd_co_send_request(s, &request, NULL, 0);
if (ret < 0) {
reply.error = -ret;
} else {
nbd_co_receive_reply(s, &request, &reply, NULL, 0);
}
nbd_coroutine_end(s, &request);
return -reply.error;
return nbd_client_session_co_discard(&s->client, sector_num,
nb_sectors);
}
static void nbd_close(BlockDriverState *bs)
{
BDRVNBDState *s = bs->opaque;
g_free(s->export_name);
qemu_opts_del(s->socket_opts);
nbd_teardown_connection(bs);
qemu_opts_del(s->socket_opts);
nbd_client_session_close(&s->client);
}
static int64_t nbd_getlength(BlockDriverState *bs)
{
BDRVNBDState *s = bs->opaque;
return s->size;
return s->client.size;
}
static BlockDriver bdrv_nbd = {

2
blockdev.c
View File

@ -1523,7 +1523,7 @@ static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
}
void qmp_change_blockdev(const char *device, const char *filename,
bool has_format, const char *format, Error **errp)
const char *format, Error **errp)
{
BlockDriverState *bs;
BlockDriver *drv = NULL;

10
hw/display/qxl.c
View File

@ -1144,8 +1144,14 @@ static void qxl_soft_reset(PCIQXLDevice *d)
static void qxl_hard_reset(PCIQXLDevice *d, int loadvm)
{
bool startstop = qemu_spice_display_is_running(&d->ssd);
trace_qxl_hard_reset(d->id, loadvm);
if (startstop) {
qemu_spice_display_stop();
}
qxl_spice_reset_cursor(d);
qxl_spice_reset_image_cache(d);
qxl_reset_surfaces(d);
@ -1159,6 +1165,10 @@ static void qxl_hard_reset(PCIQXLDevice *d, int loadvm)
}
qemu_spice_create_host_memslot(&d->ssd);
qxl_soft_reset(d);
if (startstop) {
qemu_spice_display_start();
}
}
static void qxl_reset_handler(DeviceState *dev)

2
include/sysemu/blockdev.h
View File

@ -64,7 +64,7 @@ DriveInfo *drive_init(QemuOpts *arg, BlockInterfaceType block_default_type);
DriveInfo *add_init_drive(const char *opts);
void qmp_change_blockdev(const char *device, const char *filename,
bool has_format, const char *format, Error **errp);
const char *format, Error **errp);
void do_commit(Monitor *mon, const QDict *qdict);
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data);
#endif

10
include/sysemu/char.h
View File

@ -69,6 +69,7 @@ struct CharDriverState {
void (*chr_accept_input)(struct CharDriverState *chr);
void (*chr_set_echo)(struct CharDriverState *chr, bool echo);
void (*chr_set_fe_open)(struct CharDriverState *chr, int fe_open);
void (*chr_fe_event)(struct CharDriverState *chr, int event);
void *opaque;
char *label;
char *filename;
@ -137,6 +138,15 @@ void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo);
*/
void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open);
/**
* @qemu_chr_fe_event:
*
* Send an event from the front end to the back end.
*
* @event the event to send
*/
void qemu_chr_fe_event(CharDriverState *s, int event);
/**
* @qemu_chr_fe_printf:
*

2
include/ui/qemu-spice.h
View File

@ -18,6 +18,8 @@
#ifndef QEMU_SPICE_H
#define QEMU_SPICE_H
#include "config-host.h"
#ifdef CONFIG_SPICE
#include <spice.h>

10
libcacard/vscclient.c
View File

@ -58,7 +58,7 @@ static QemuMutex socket_to_send_lock;
static guint socket_tag;
static void
update_socket_watch(gboolean out);
update_socket_watch(void);
static gboolean
do_socket_send(GIOChannel *source,
@ -80,7 +80,7 @@ do_socket_send(GIOChannel *source,
g_byte_array_remove_range(socket_to_send, 0, bw);
if (socket_to_send->len == 0) {
update_socket_watch(FALSE);
update_socket_watch();
return FALSE;
}
return TRUE;
@ -89,7 +89,7 @@ do_socket_send(GIOChannel *source,
static gboolean
socket_prepare_sending(gpointer user_data)
{
update_socket_watch(TRUE);
update_socket_watch();
return FALSE;
}
@ -440,8 +440,10 @@ do_socket(GIOChannel *source,
}
static void
update_socket_watch(gboolean out)
update_socket_watch(void)
{
gboolean out = socket_to_send->len > 0;
if (socket_tag != 0) {
g_source_remove(socket_tag);
}

2
nbd.c
View File

@ -443,7 +443,6 @@ int nbd_receive_negotiate(int csock, const char *name, uint32_t *flags,
TRACE("Receiving negotiation.");
qemu_set_block(csock);
rc = -EINVAL;
if (read_sync(csock, buf, 8) != 8) {
@ -558,7 +557,6 @@ int nbd_receive_negotiate(int csock, const char *name, uint32_t *flags,
rc = 0;
fail:
qemu_set_nonblock(csock);
return rc;
}

7
qemu-char.c
View File

@ -3353,6 +3353,13 @@ void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
}
}
void qemu_chr_fe_event(struct CharDriverState *chr, int event)
{
if (chr->chr_fe_event) {
chr->chr_fe_event(chr, event);
}
}
int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
GIOFunc func, void *user_data)
{

2
qmp.c
View File

@ -400,7 +400,7 @@ void qmp_change(const char *device, const char *target,
if (strcmp(device, "vnc") == 0) {
qmp_change_vnc(target, has_arg, arg, err);
} else {
qmp_change_blockdev(device, target, has_arg, arg, err);
qmp_change_blockdev(device, target, arg, err);
}
}

11
spice-qemu-char.c
View File

@ -11,7 +11,6 @@
typedef struct SpiceCharDriver {
CharDriverState* chr;
SpiceCharDeviceInstance sin;
char *subtype;
bool active;
bool blocked;
const uint8_t *datapos;
@ -223,6 +222,15 @@ static void spice_chr_set_fe_open(struct CharDriverState *chr, int fe_open)
}
}
static void spice_chr_fe_event(struct CharDriverState *chr, int event)
{
#if SPICE_SERVER_VERSION >= 0x000c02
SpiceCharDriver *s = chr->opaque;
spice_server_port_event(&s->sin, event);
#endif
}
static void print_allowed_subtypes(void)
{
const char** psubtype;
@ -256,6 +264,7 @@ static CharDriverState *chr_open(const char *subtype)
chr->chr_close = spice_chr_close;
chr->chr_set_fe_open = spice_chr_set_fe_open;
chr->explicit_be_open = true;
chr->chr_fe_event = spice_chr_fe_event;
QLIST_INSERT_HEAD(&spice_chars, s, next);

22
ui/spice-core.c
View File

@ -47,6 +47,7 @@ static const char *auth = "spice";
static char *auth_passwd;
static time_t auth_expires = TIME_MAX;
static int spice_migration_completed;
static int spice_display_is_running;
int using_spice = 0;
static QemuThread me;
@ -622,9 +623,7 @@ static void vm_change_state_handler(void *opaque, int running,
{
if (running) {
qemu_spice_display_start();
spice_server_vm_start(spice_server);
} else {
spice_server_vm_stop(spice_server);
qemu_spice_display_stop();
}
}
@ -776,6 +775,8 @@ void qemu_spice_init(void)
if (str) {
int streaming_video = parse_stream_video(str);
spice_server_set_streaming_video(spice_server, streaming_video);
} else {
spice_server_set_streaming_video(spice_server, SPICE_STREAM_VIDEO_OFF);
}
spice_server_set_agent_mouse
@ -902,6 +903,23 @@ int qemu_spice_display_add_client(int csock, int skipauth, int tls)
}
}
void qemu_spice_display_start(void)
{
spice_display_is_running = true;
spice_server_vm_start(spice_server);
}
void qemu_spice_display_stop(void)
{
spice_server_vm_stop(spice_server);
spice_display_is_running = false;
}
int qemu_spice_display_is_running(SimpleSpiceDisplay *ssd)
{
return spice_display_is_running;
}
static void spice_register_config(void)
{
qemu_add_opts(&qemu_spice_opts);

17
ui/spice-display.c
View File

@ -126,23 +126,6 @@ void qemu_spice_wakeup(SimpleSpiceDisplay *ssd)
spice_qxl_wakeup(&ssd->qxl);
}
static int spice_display_is_running;
void qemu_spice_display_start(void)
{
spice_display_is_running = true;
}
void qemu_spice_display_stop(void)
{
spice_display_is_running = false;
}
int qemu_spice_display_is_running(SimpleSpiceDisplay *ssd)
{
return spice_display_is_running;
}
static void qemu_spice_create_one_update(SimpleSpiceDisplay *ssd,
QXLRect *rect)
{