diff options
| -rw-r--r-- | block/nbd-client.c | 3 | ||||
| -rw-r--r-- | block/nbd-client.h | 1 | ||||
| -rw-r--r-- | block/nbd.c | 10 | ||||
| -rw-r--r-- | include/block/nbd.h | 1 | ||||
| -rw-r--r-- | nbd/client.c | 4 | ||||
| -rw-r--r-- | qapi/block-core.json | 7 |
6 files changed, 21 insertions, 5 deletions
diff --git a/block/nbd-client.c b/block/nbd-client.c index 8d69eaaa32..9686ecbd5e 100644 --- a/block/nbd-client.c +++ b/block/nbd-client.c @@ -970,6 +970,7 @@ int nbd_client_init(BlockDriverState *bs, const char *export, QCryptoTLSCreds *tlscreds, const char *hostname, + const char *x_dirty_bitmap, Error **errp) { NBDClientSession *client = nbd_get_client_session(bs); @@ -982,9 +983,11 @@ int nbd_client_init(BlockDriverState *bs, client->info.request_sizes = true; client->info.structured_reply = true; client->info.base_allocation = true; + client->info.x_dirty_bitmap = g_strdup(x_dirty_bitmap); ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), export, tlscreds, hostname, &client->ioc, &client->info, errp); + g_free(client->info.x_dirty_bitmap); if (ret < 0) { logout("Failed to negotiate with the NBD server\n"); return ret; diff --git a/block/nbd-client.h b/block/nbd-client.h index 0ece76e5af..cfc90550b9 100644 --- a/block/nbd-client.h +++ b/block/nbd-client.h @@ -45,6 +45,7 @@ int nbd_client_init(BlockDriverState *bs, const char *export_name, QCryptoTLSCreds *tlscreds, const char *hostname, + const char *x_dirty_bitmap, Error **errp); void nbd_client_close(BlockDriverState *bs); diff --git a/block/nbd.c b/block/nbd.c index 13db4030e6..b198ad775f 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -378,6 +378,12 @@ static QemuOptsList nbd_runtime_opts = { .type = QEMU_OPT_STRING, .help = "ID of the TLS credentials to use", }, + { + .name = "x-dirty-bitmap", + .type = QEMU_OPT_STRING, + .help = "experimental: expose named dirty bitmap in place of " + "block status", + }, { /* end of list */ } }, }; @@ -438,8 +444,8 @@ static int nbd_open(BlockDriverState *bs, QDict *options, int flags, } /* NBD handshake */ - ret = nbd_client_init(bs, sioc, s->export, - tlscreds, hostname, errp); + ret = nbd_client_init(bs, sioc, s->export, tlscreds, hostname, + qemu_opt_get(opts, "x-dirty-bitmap"), errp); error: if (sioc) { object_unref(OBJECT(sioc)); diff --git a/include/block/nbd.h b/include/block/nbd.h index daaeae61bf..4638c839f5 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -259,6 +259,7 @@ static inline bool nbd_reply_type_is_error(int type) struct NBDExportInfo { /* Set by client before nbd_receive_negotiate() */ bool request_sizes; + char *x_dirty_bitmap; /* In-out fields, set by client before nbd_receive_negotiate() and * updated by server results during nbd_receive_negotiate() */ diff --git a/nbd/client.c b/nbd/client.c index 232ff4f46d..40b74d9761 100644 --- a/nbd/client.c +++ b/nbd/client.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2016-2017 Red Hat, Inc. + * Copyright (C) 2016-2018 Red Hat, Inc. * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws> * * Network Block Device Client Side @@ -831,7 +831,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char *name, if (info->structured_reply && base_allocation) { result = nbd_negotiate_simple_meta_context( - ioc, name, "base:allocation", + ioc, name, info->x_dirty_bitmap ?: "base:allocation", &info->meta_base_allocation_id, errp); if (result < 0) { goto fail; diff --git a/qapi/block-core.json b/qapi/block-core.json index 577ce5e999..90e554ed0f 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -3471,12 +3471,17 @@ # # @tls-creds: TLS credentials ID # +# @x-dirty-bitmap: A "qemu:dirty-bitmap:NAME" string to query in place of +# traditional "base:allocation" block status (see +# NBD_OPT_LIST_META_CONTEXT in the NBD protocol) (since 3.0) +# # Since: 2.9 ## { 'struct': 'BlockdevOptionsNbd', 'data': { 'server': 'SocketAddress', '*export': 'str', - '*tls-creds': 'str' } } + '*tls-creds': 'str', + '*x-dirty-bitmap': 'str' } } ## # @BlockdevOptionsRaw: |