From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: qemu-block@nongnu.org
Cc: qemu-devel@nongnu.org, vsementsov@virtuozzo.com,
eblake@redhat.com, mreitz@redhat.com, kwolf@redhat.com,
pbonzini@redhat.com
Subject: [PATCH v4 30/32] block/nbd: reuse nbd_co_do_establish_connection() in nbd_open()
Date: Thu, 10 Jun 2021 13:08:00 +0300 [thread overview]
Message-ID: <20210610100802.5888-31-vsementsov@virtuozzo.com> (raw)
In-Reply-To: <20210610100802.5888-1-vsementsov@virtuozzo.com>
The only last step we need to reuse the function is coroutine-wrapper.
nbd_open() may be called from non-coroutine context. So, generate the
wrapper and use it.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
block/coroutines.h | 6 +++
block/nbd.c | 103 +++------------------------------------------
2 files changed, 11 insertions(+), 98 deletions(-)
diff --git a/block/coroutines.h b/block/coroutines.h
index 4cfb4946e6..514d169d23 100644
--- a/block/coroutines.h
+++ b/block/coroutines.h
@@ -66,4 +66,10 @@ int coroutine_fn bdrv_co_readv_vmstate(BlockDriverState *bs,
int coroutine_fn bdrv_co_writev_vmstate(BlockDriverState *bs,
QEMUIOVector *qiov, int64_t pos);
+int generated_co_wrapper
+nbd_do_establish_connection(BlockDriverState *bs, Error **errp);
+int coroutine_fn
+nbd_co_do_establish_connection(BlockDriverState *bs, Error **errp);
+
+
#endif /* BLOCK_COROUTINES_INT_H */
diff --git a/block/nbd.c b/block/nbd.c
index bf2e939314..5e7e238b47 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -44,6 +44,7 @@
#include "block/qdict.h"
#include "block/nbd.h"
#include "block/block_int.h"
+#include "block/coroutines.h"
#include "qemu/yank.h"
@@ -99,11 +100,6 @@ typedef struct BDRVNBDState {
NBDClientConnection *conn;
} BDRVNBDState;
-static QIOChannelSocket *nbd_establish_connection(BlockDriverState *bs,
- SocketAddress *saddr,
- Error **errp);
-static int nbd_client_handshake(BlockDriverState *bs, QIOChannelSocket *sioc,
- Error **errp);
static void nbd_yank(void *opaque);
static void nbd_clear_bdrvstate(BlockDriverState *bs)
@@ -356,8 +352,8 @@ static int nbd_handle_updated_info(BlockDriverState *bs, Error **errp)
return 0;
}
-static int coroutine_fn nbd_co_do_establish_connection(BlockDriverState *bs,
- Error **errp)
+int coroutine_fn nbd_co_do_establish_connection(BlockDriverState *bs,
+ Error **errp)
{
BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
int ret;
@@ -1573,83 +1569,6 @@ static void nbd_client_close(BlockDriverState *bs)
nbd_teardown_connection(bs);
}
-static QIOChannelSocket *nbd_establish_connection(BlockDriverState *bs,
- SocketAddress *saddr,
- Error **errp)
-{
- ERRP_GUARD();
- QIOChannelSocket *sioc;
-
- sioc = qio_channel_socket_new();
- qio_channel_set_name(QIO_CHANNEL(sioc), "nbd-client");
-
- qio_channel_socket_connect_sync(sioc, saddr, errp);
- if (*errp) {
- object_unref(OBJECT(sioc));
- return NULL;
- }
-
- yank_register_function(BLOCKDEV_YANK_INSTANCE(bs->node_name), nbd_yank, bs);
- qio_channel_set_delay(QIO_CHANNEL(sioc), false);
-
- return sioc;
-}
-
-/* nbd_client_handshake takes ownership on sioc. */
-static int nbd_client_handshake(BlockDriverState *bs, QIOChannelSocket *sioc,
- Error **errp)
-{
- BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
- AioContext *aio_context = bdrv_get_aio_context(bs);
- int ret;
-
- trace_nbd_client_handshake(s->export);
- qio_channel_set_blocking(QIO_CHANNEL(sioc), false, NULL);
- qio_channel_attach_aio_context(QIO_CHANNEL(sioc), aio_context);
-
- s->info.request_sizes = true;
- s->info.structured_reply = true;
- s->info.base_allocation = true;
- s->info.x_dirty_bitmap = g_strdup(s->x_dirty_bitmap);
- s->info.name = g_strdup(s->export ?: "");
- ret = nbd_receive_negotiate(aio_context, QIO_CHANNEL(sioc), s->tlscreds,
- s->hostname, &s->ioc, &s->info, errp);
- g_free(s->info.x_dirty_bitmap);
- g_free(s->info.name);
- if (ret < 0) {
- yank_unregister_function(BLOCKDEV_YANK_INSTANCE(bs->node_name),
- nbd_yank, bs);
- object_unref(OBJECT(sioc));
- return ret;
- }
-
- if (s->ioc) {
- /* sioc is referenced by s->ioc */
- object_unref(OBJECT(sioc));
- } else {
- s->ioc = QIO_CHANNEL(sioc);
- }
- sioc = NULL;
-
- ret = nbd_handle_updated_info(bs, errp);
- if (ret < 0) {
- /*
- * We have connected, but must fail for other reasons.
- * Send NBD_CMD_DISC as a courtesy to the server.
- */
- NBDRequest request = { .type = NBD_CMD_DISC };
-
- nbd_send_request(s->ioc, &request);
-
- yank_unregister_function(BLOCKDEV_YANK_INSTANCE(bs->node_name),
- nbd_yank, bs);
- object_unref(OBJECT(s->ioc));
- s->ioc = NULL;
- return ret;
- }
-
- return 0;
-}
/*
* Parse nbd_open options
@@ -2039,7 +1958,6 @@ static int nbd_open(BlockDriverState *bs, QDict *options, int flags,
{
int ret;
BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
- QIOChannelSocket *sioc;
s->bs = bs;
qemu_co_mutex_init(&s->send_mutex);
@@ -2057,22 +1975,11 @@ static int nbd_open(BlockDriverState *bs, QDict *options, int flags,
s->conn = nbd_client_connection_new(s->saddr, true, s->export,
s->x_dirty_bitmap, s->tlscreds);
- /*
- * establish TCP connection, return error if it fails
- * TODO: Configurable retry-until-timeout behaviour.
- */
- sioc = nbd_establish_connection(bs, s->saddr, errp);
- if (!sioc) {
- ret = -ECONNREFUSED;
- goto fail;
- }
-
- ret = nbd_client_handshake(bs, sioc, errp);
+ /* TODO: Configurable retry-until-timeout behaviour. */
+ ret = nbd_do_establish_connection(bs, errp);
if (ret < 0) {
goto fail;
}
- /* successfully connected */
- s->state = NBD_CLIENT_CONNECTED;
s->connection_co = qemu_coroutine_create(nbd_connection_entry, s);
bdrv_inc_in_flight(bs);
--
2.29.2
next prev parent reply other threads:[~2021-06-10 10:28 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-10 10:07 [PATCH v4 00/32] block/nbd: rework client connection Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 01/32] co-queue: drop extra coroutine_fn marks Vladimir Sementsov-Ogievskiy
2021-06-10 17:22 ` Eric Blake
2021-06-10 17:37 ` Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 02/32] block/nbd: fix channel object leak Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 03/32] block/nbd: fix how state is cleared on nbd_open() failure paths Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 04/32] block/nbd: connect_thread_func(): do qio_channel_set_delay(false) Vladimir Sementsov-Ogievskiy
2021-06-10 18:37 ` Eric Blake
2021-06-10 10:07 ` [PATCH v4 05/32] qemu-sockets: introduce socket_address_parse_named_fd() Vladimir Sementsov-Ogievskiy
2021-06-11 13:22 ` Eric Blake
2021-06-11 14:10 ` Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 06/32] block/nbd: call socket_address_parse_named_fd() in advance Vladimir Sementsov-Ogievskiy
2021-06-11 13:54 ` Eric Blake
2021-06-10 10:07 ` [PATCH v4 07/32] block/nbd: ensure ->connection_thread is always valid Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 08/32] block/nbd: nbd_client_handshake(): fix leak of s->ioc Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 09/32] block/nbd: BDRVNBDState: drop unused connect_err and connect_status Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 10/32] block/nbd: simplify waking of nbd_co_establish_connection() Vladimir Sementsov-Ogievskiy
2021-06-11 14:06 ` Eric Blake
2021-06-10 10:07 ` [PATCH v4 11/32] block/nbd: drop thr->state Vladimir Sementsov-Ogievskiy
2021-06-11 14:25 ` Eric Blake
2021-06-10 10:07 ` [PATCH v4 12/32] block/nbd: bs-independent interface for nbd_co_establish_connection() Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 13/32] block/nbd: make nbd_co_establish_connection_cancel() bs-independent Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 14/32] block/nbd: rename NBDConnectThread to NBDClientConnection Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 15/32] block/nbd: introduce nbd_client_connection_new() Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 16/32] block/nbd: introduce nbd_client_connection_release() Vladimir Sementsov-Ogievskiy
2021-06-11 14:28 ` Eric Blake
2021-06-10 10:07 ` [PATCH v4 17/32] nbd: move connection code from block/nbd to nbd/client-connection Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 18/32] nbd/client-connection: use QEMU_LOCK_GUARD Vladimir Sementsov-Ogievskiy
2021-06-11 14:31 ` Eric Blake
2021-06-10 10:07 ` [PATCH v4 19/32] nbd/client-connection: add possibility of negotiation Vladimir Sementsov-Ogievskiy
2021-06-11 15:07 ` Eric Blake
2021-06-10 10:07 ` [PATCH v4 20/32] nbd/client-connection: implement connection retry Vladimir Sementsov-Ogievskiy
2021-06-11 15:12 ` Eric Blake
2021-11-22 16:30 ` Eric Blake
2021-11-22 17:17 ` Vladimir Sementsov-Ogievskiy
2021-11-22 21:51 ` Eric Blake
2021-06-10 10:07 ` [PATCH v4 21/32] nbd/client-connection: shutdown connection on release Vladimir Sementsov-Ogievskiy
2021-06-11 15:27 ` Eric Blake
2021-06-10 10:07 ` [PATCH v4 22/32] block/nbd: split nbd_handle_updated_info out of nbd_client_handshake() Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 23/32] block/nbd: use negotiation of NBDClientConnection Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 24/32] block/nbd: don't touch s->sioc in nbd_teardown_connection() Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 25/32] block/nbd: drop BDRVNBDState::sioc Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 26/32] nbd/client-connection: return only one io channel Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 27/32] block-coroutine-wrapper: allow non bdrv_ prefix Vladimir Sementsov-Ogievskiy
2021-06-10 10:07 ` [PATCH v4 28/32] block/nbd: split nbd_co_do_establish_connection out of nbd_reconnect_attempt Vladimir Sementsov-Ogievskiy
2021-06-11 15:29 ` Eric Blake
2021-06-10 10:07 ` [PATCH v4 29/32] nbd/client-connection: add option for non-blocking connection attempt Vladimir Sementsov-Ogievskiy
2021-06-10 10:08 ` Vladimir Sementsov-Ogievskiy [this message]
2021-06-10 10:08 ` [PATCH v4 31/32] block/nbd: add nbd_client_connected() helper Vladimir Sementsov-Ogievskiy
2021-06-10 10:08 ` [PATCH v4 32/32] block/nbd: safer transition to receiving request Vladimir Sementsov-Ogievskiy
2021-06-11 15:55 ` [PATCH v4 00/32] block/nbd: rework client connection Eric Blake
2021-06-11 17:23 ` Vladimir Sementsov-Ogievskiy
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