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 22/32] block/nbd: split nbd_handle_updated_info out of nbd_client_handshake()
Date: Thu, 10 Jun 2021 13:07:52 +0300 [thread overview]
Message-ID: <20210610100802.5888-23-vsementsov@virtuozzo.com> (raw)
In-Reply-To: <20210610100802.5888-1-vsementsov@virtuozzo.com>
To be reused in the following patch.
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 | 100 ++++++++++++++++++++++++++++++----------------------
1 file changed, 58 insertions(+), 42 deletions(-)
diff --git a/block/nbd.c b/block/nbd.c
index df9d241313..240c6e1b3d 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -314,6 +314,51 @@ static bool nbd_client_connecting_wait(BDRVNBDState *s)
return qatomic_load_acquire(&s->state) == NBD_CLIENT_CONNECTING_WAIT;
}
+/*
+ * Update @bs with information learned during a completed negotiation process.
+ * Return failure if the server's advertised options are incompatible with the
+ * client's needs.
+ */
+static int nbd_handle_updated_info(BlockDriverState *bs, Error **errp)
+{
+ BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
+ int ret;
+
+ if (s->x_dirty_bitmap) {
+ if (!s->info.base_allocation) {
+ error_setg(errp, "requested x-dirty-bitmap %s not found",
+ s->x_dirty_bitmap);
+ return -EINVAL;
+ }
+ if (strcmp(s->x_dirty_bitmap, "qemu:allocation-depth") == 0) {
+ s->alloc_depth = true;
+ }
+ }
+
+ if (s->info.flags & NBD_FLAG_READ_ONLY) {
+ ret = bdrv_apply_auto_read_only(bs, "NBD export is read-only", errp);
+ if (ret < 0) {
+ return ret;
+ }
+ }
+
+ if (s->info.flags & NBD_FLAG_SEND_FUA) {
+ bs->supported_write_flags = BDRV_REQ_FUA;
+ bs->supported_zero_flags |= BDRV_REQ_FUA;
+ }
+
+ if (s->info.flags & NBD_FLAG_SEND_WRITE_ZEROES) {
+ bs->supported_zero_flags |= BDRV_REQ_MAY_UNMAP;
+ if (s->info.flags & NBD_FLAG_SEND_FAST_ZERO) {
+ bs->supported_zero_flags |= BDRV_REQ_NO_FALLBACK;
+ }
+ }
+
+ trace_nbd_client_handshake_success(s->export);
+
+ return 0;
+}
+
static coroutine_fn void nbd_reconnect_attempt(BDRVNBDState *s)
{
int ret;
@@ -1575,49 +1620,13 @@ static int nbd_client_handshake(BlockDriverState *bs, Error **errp)
s->sioc = NULL;
return ret;
}
- if (s->x_dirty_bitmap) {
- if (!s->info.base_allocation) {
- error_setg(errp, "requested x-dirty-bitmap %s not found",
- s->x_dirty_bitmap);
- ret = -EINVAL;
- goto fail;
- }
- if (strcmp(s->x_dirty_bitmap, "qemu:allocation-depth") == 0) {
- s->alloc_depth = true;
- }
- }
- if (s->info.flags & NBD_FLAG_READ_ONLY) {
- ret = bdrv_apply_auto_read_only(bs, "NBD export is read-only", errp);
- if (ret < 0) {
- goto fail;
- }
- }
- if (s->info.flags & NBD_FLAG_SEND_FUA) {
- bs->supported_write_flags = BDRV_REQ_FUA;
- bs->supported_zero_flags |= BDRV_REQ_FUA;
- }
- if (s->info.flags & NBD_FLAG_SEND_WRITE_ZEROES) {
- bs->supported_zero_flags |= BDRV_REQ_MAY_UNMAP;
- if (s->info.flags & NBD_FLAG_SEND_FAST_ZERO) {
- bs->supported_zero_flags |= BDRV_REQ_NO_FALLBACK;
- }
- }
- if (!s->ioc) {
- s->ioc = QIO_CHANNEL(s->sioc);
- object_ref(OBJECT(s->ioc));
- }
-
- trace_nbd_client_handshake_success(s->export);
-
- return 0;
-
- fail:
- /*
- * We have connected, but must fail for other reasons.
- * Send NBD_CMD_DISC as a courtesy to the server.
- */
- {
+ 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 ?: QIO_CHANNEL(s->sioc), &request);
@@ -1631,6 +1640,13 @@ static int nbd_client_handshake(BlockDriverState *bs, Error **errp)
return ret;
}
+
+ if (!s->ioc) {
+ s->ioc = QIO_CHANNEL(s->sioc);
+ object_ref(OBJECT(s->ioc));
+ }
+
+ return 0;
}
/*
--
2.29.2
next prev parent reply other threads:[~2021-06-10 10:34 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 ` Vladimir Sementsov-Ogievskiy [this message]
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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