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, Roman Kagan <rvkagan@yandex-team.ru>
Subject: [PATCH v4 14/32] block/nbd: rename NBDConnectThread to NBDClientConnection
Date: Thu, 10 Jun 2021 13:07:44 +0300 [thread overview]
Message-ID: <20210610100802.5888-15-vsementsov@virtuozzo.com> (raw)
In-Reply-To: <20210610100802.5888-1-vsementsov@virtuozzo.com>
We are going to move the connection code to its own file, and want
clear names and APIs first.
The structure is shared between user and (possibly) several runs of
connect-thread. So it's wrong to call it "thread". Let's rename to
something more generic.
Appropriately rename connect_thread and thr variables to conn.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Roman Kagan <rvkagan@yandex-team.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
block/nbd.c | 134 ++++++++++++++++++++++++++--------------------------
1 file changed, 67 insertions(+), 67 deletions(-)
diff --git a/block/nbd.c b/block/nbd.c
index 40e8d5b425..a7f1e4ebe3 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -66,7 +66,7 @@ typedef enum NBDClientState {
NBD_CLIENT_QUIT
} NBDClientState;
-typedef struct NBDConnectThread {
+typedef struct NBDClientConnection {
/* Initialization constants */
SocketAddress *saddr; /* address to connect to */
@@ -90,7 +90,7 @@ typedef struct NBDConnectThread {
* nbd_co_establish_connection() after yield()
*/
Coroutine *wait_co;
-} NBDConnectThread;
+} NBDClientConnection;
typedef struct BDRVNBDState {
QIOChannelSocket *sioc; /* The master data channel */
@@ -123,36 +123,36 @@ typedef struct BDRVNBDState {
char *x_dirty_bitmap;
bool alloc_depth;
- NBDConnectThread *connect_thread;
+ NBDClientConnection *conn;
} BDRVNBDState;
-static void nbd_free_connect_thread(NBDConnectThread *thr);
+static void nbd_free_connect_thread(NBDClientConnection *conn);
static int nbd_establish_connection(BlockDriverState *bs, SocketAddress *saddr,
Error **errp);
static coroutine_fn QIOChannelSocket *
-nbd_co_establish_connection(NBDConnectThread *thr, Error **errp);
-static void nbd_co_establish_connection_cancel(NBDConnectThread *thr);
+nbd_co_establish_connection(NBDClientConnection *conn, Error **errp);
+static void nbd_co_establish_connection_cancel(NBDClientConnection *conn);
static int nbd_client_handshake(BlockDriverState *bs, Error **errp);
static void nbd_yank(void *opaque);
static void nbd_clear_bdrvstate(BlockDriverState *bs)
{
BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
- NBDConnectThread *thr = s->connect_thread;
+ NBDClientConnection *conn = s->conn;
bool do_free = false;
- qemu_mutex_lock(&thr->mutex);
- assert(!thr->detached);
- if (thr->running) {
- thr->detached = true;
+ qemu_mutex_lock(&conn->mutex);
+ assert(!conn->detached);
+ if (conn->running) {
+ conn->detached = true;
} else {
do_free = true;
}
- qemu_mutex_unlock(&thr->mutex);
+ qemu_mutex_unlock(&conn->mutex);
/* the runaway thread will clean up itself */
if (do_free) {
- nbd_free_connect_thread(thr);
+ nbd_free_connect_thread(conn);
}
yank_unregister_instance(BLOCKDEV_YANK_INSTANCE(bs->node_name));
@@ -294,7 +294,7 @@ static void coroutine_fn nbd_client_co_drain_begin(BlockDriverState *bs)
s->drained = true;
qemu_co_sleep_wake(&s->reconnect_sleep);
- nbd_co_establish_connection_cancel(s->connect_thread);
+ nbd_co_establish_connection_cancel(s->conn);
reconnect_delay_timer_del(s);
@@ -332,7 +332,7 @@ static void nbd_teardown_connection(BlockDriverState *bs)
s->state = NBD_CLIENT_QUIT;
if (s->connection_co) {
qemu_co_sleep_wake(&s->reconnect_sleep);
- nbd_co_establish_connection_cancel(s->connect_thread);
+ nbd_co_establish_connection_cancel(s->conn);
}
if (qemu_in_coroutine()) {
s->teardown_co = qemu_coroutine_self();
@@ -359,65 +359,65 @@ static bool nbd_client_connecting_wait(BDRVNBDState *s)
static void nbd_init_connect_thread(BDRVNBDState *s)
{
- s->connect_thread = g_new(NBDConnectThread, 1);
+ s->conn = g_new(NBDClientConnection, 1);
- *s->connect_thread = (NBDConnectThread) {
+ *s->conn = (NBDClientConnection) {
.saddr = QAPI_CLONE(SocketAddress, s->saddr),
};
- qemu_mutex_init(&s->connect_thread->mutex);
+ qemu_mutex_init(&s->conn->mutex);
}
-static void nbd_free_connect_thread(NBDConnectThread *thr)
+static void nbd_free_connect_thread(NBDClientConnection *conn)
{
- if (thr->sioc) {
- qio_channel_close(QIO_CHANNEL(thr->sioc), NULL);
- object_unref(OBJECT(thr->sioc));
+ if (conn->sioc) {
+ qio_channel_close(QIO_CHANNEL(conn->sioc), NULL);
+ object_unref(OBJECT(conn->sioc));
}
- error_free(thr->err);
- qapi_free_SocketAddress(thr->saddr);
- g_free(thr);
+ error_free(conn->err);
+ qapi_free_SocketAddress(conn->saddr);
+ g_free(conn);
}
static void *connect_thread_func(void *opaque)
{
- NBDConnectThread *thr = opaque;
+ NBDClientConnection *conn = opaque;
int ret;
bool do_free;
- thr->sioc = qio_channel_socket_new();
+ conn->sioc = qio_channel_socket_new();
- error_free(thr->err);
- thr->err = NULL;
- ret = qio_channel_socket_connect_sync(thr->sioc, thr->saddr, &thr->err);
+ error_free(conn->err);
+ conn->err = NULL;
+ ret = qio_channel_socket_connect_sync(conn->sioc, conn->saddr, &conn->err);
if (ret < 0) {
- object_unref(OBJECT(thr->sioc));
- thr->sioc = NULL;
+ object_unref(OBJECT(conn->sioc));
+ conn->sioc = NULL;
}
- qio_channel_set_delay(QIO_CHANNEL(thr->sioc), false);
+ qio_channel_set_delay(QIO_CHANNEL(conn->sioc), false);
- qemu_mutex_lock(&thr->mutex);
+ qemu_mutex_lock(&conn->mutex);
- assert(thr->running);
- thr->running = false;
- if (thr->wait_co) {
- aio_co_wake(thr->wait_co);
- thr->wait_co = NULL;
+ assert(conn->running);
+ conn->running = false;
+ if (conn->wait_co) {
+ aio_co_wake(conn->wait_co);
+ conn->wait_co = NULL;
}
- do_free = thr->detached;
+ do_free = conn->detached;
- qemu_mutex_unlock(&thr->mutex);
+ qemu_mutex_unlock(&conn->mutex);
if (do_free) {
- nbd_free_connect_thread(thr);
+ nbd_free_connect_thread(conn);
}
return NULL;
}
/*
- * Get a new connection in context of @thr:
+ * Get a new connection in context of @conn:
* if the thread is running, wait for completion
* if the thread already succeeded in the background, and user didn't get the
* result, just return it now
@@ -425,38 +425,38 @@ static void *connect_thread_func(void *opaque)
* completion
*/
static coroutine_fn QIOChannelSocket *
-nbd_co_establish_connection(NBDConnectThread *thr, Error **errp)
+nbd_co_establish_connection(NBDClientConnection *conn, Error **errp)
{
QIOChannelSocket *sioc = NULL;
QemuThread thread;
- qemu_mutex_lock(&thr->mutex);
+ qemu_mutex_lock(&conn->mutex);
/*
* Don't call nbd_co_establish_connection() in several coroutines in
* parallel. Only one call at once is supported.
*/
- assert(!thr->wait_co);
+ assert(!conn->wait_co);
- if (!thr->running) {
- if (thr->sioc) {
+ if (!conn->running) {
+ if (conn->sioc) {
/* Previous attempt finally succeeded in background */
- sioc = g_steal_pointer(&thr->sioc);
- qemu_mutex_unlock(&thr->mutex);
+ sioc = g_steal_pointer(&conn->sioc);
+ qemu_mutex_unlock(&conn->mutex);
return sioc;
}
- thr->running = true;
- error_free(thr->err);
- thr->err = NULL;
+ conn->running = true;
+ error_free(conn->err);
+ conn->err = NULL;
qemu_thread_create(&thread, "nbd-connect",
- connect_thread_func, thr, QEMU_THREAD_DETACHED);
+ connect_thread_func, conn, QEMU_THREAD_DETACHED);
}
- thr->wait_co = qemu_coroutine_self();
+ conn->wait_co = qemu_coroutine_self();
- qemu_mutex_unlock(&thr->mutex);
+ qemu_mutex_unlock(&conn->mutex);
/*
* We are going to wait for connect-thread finish, but
@@ -464,9 +464,9 @@ nbd_co_establish_connection(NBDConnectThread *thr, Error **errp)
*/
qemu_coroutine_yield();
- qemu_mutex_lock(&thr->mutex);
+ qemu_mutex_lock(&conn->mutex);
- if (thr->running) {
+ if (conn->running) {
/*
* The connection attempt was canceled and the coroutine resumed
* before the connection thread finished its job. Report the
@@ -475,12 +475,12 @@ nbd_co_establish_connection(NBDConnectThread *thr, Error **errp)
*/
error_setg(errp, "Connection attempt cancelled by other operation");
} else {
- error_propagate(errp, thr->err);
- thr->err = NULL;
- sioc = g_steal_pointer(&thr->sioc);
+ error_propagate(errp, conn->err);
+ conn->err = NULL;
+ sioc = g_steal_pointer(&conn->sioc);
}
- qemu_mutex_unlock(&thr->mutex);
+ qemu_mutex_unlock(&conn->mutex);
return sioc;
}
@@ -493,15 +493,15 @@ nbd_co_establish_connection(NBDConnectThread *thr, Error **errp)
* socket, but rather safely wakes nbd_co_establish_connection() which is
* sleeping in yield()
*/
-static void nbd_co_establish_connection_cancel(NBDConnectThread *thr)
+static void nbd_co_establish_connection_cancel(NBDClientConnection *conn)
{
Coroutine *wait_co;
- qemu_mutex_lock(&thr->mutex);
+ qemu_mutex_lock(&conn->mutex);
- wait_co = g_steal_pointer(&thr->wait_co);
+ wait_co = g_steal_pointer(&conn->wait_co);
- qemu_mutex_unlock(&thr->mutex);
+ qemu_mutex_unlock(&conn->mutex);
if (wait_co) {
aio_co_wake(wait_co);
@@ -551,7 +551,7 @@ static coroutine_fn void nbd_reconnect_attempt(BDRVNBDState *s)
s->ioc = NULL;
}
- s->sioc = nbd_co_establish_connection(s->connect_thread, NULL);
+ s->sioc = nbd_co_establish_connection(s->conn, NULL);
if (!s->sioc) {
ret = -ECONNREFUSED;
goto out;
--
2.29.2
next prev parent reply other threads:[~2021-06-10 10:32 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 ` Vladimir Sementsov-Ogievskiy [this message]
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 ` [PATCH v4 30/32] block/nbd: reuse nbd_co_do_establish_connection() in nbd_open() Vladimir Sementsov-Ogievskiy
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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