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bh=eGYl5LmM3HC8DO75LfUAxMLFkMebSsZecXYcf5OiUlw=; b=KFmB9drEuX0eOTVGY1WBNYJBM7rJFgYNt5NCHJS2Di+SpowEvQmSi4ZjXYqj3HOUQaAe78 YFx+meq9pcvz4j8WW7uCs4/peHSxklKYlLRvXS1W0fvkw6jqT8oyAMWdAKdZkCURDtp0hH 7FQB9t5iYIsPEB/IBbeP39NpKeSF9WQ= X-MC-Unique: QV5G2enMOjCl_244cQoLEA-1 From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH 15/29] block/export: Add node-name to BlockExportOptions Date: Mon, 7 Sep 2020 20:19:57 +0200 Message-Id: <20200907182011.521007-16-kwolf@redhat.com> In-Reply-To: <20200907182011.521007-1-kwolf@redhat.com> References: <20200907182011.521007-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" Every block export needs a block node to export, so add a 'node-name' option to BlockExportOptions and remove the replaced option 'device' from BlockExportOptionsNbd. To maintain compatibility in nbd-server-add, BlockExportOptionsNbd needs to be wrapped by a new type NbdServerAddOptions that adds 'device' back because nbd-server-add doesn't use the BlockExportOptions base type at all (so even without changing it to a 'node-name' option in block-export-add, this compatibility code would be necessary). Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- qapi/block-export.json | 27 ++++++++++++++++----- block/monitor/block-hmp-cmds.c | 6 ++--- blockdev-nbd.c | 44 +++++++++++++++++++++++++--------- qemu-nbd.c | 2 +- 4 files changed, 58 insertions(+), 21 deletions(-) diff --git a/qapi/block-export.json b/qapi/block-export.json index d95c082a33..4d22f46c94 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -65,9 +65,8 @@ ## # @BlockExportOptionsNbd: # -# An NBD block export. -# -# @device: The device name or node name of the node to be exported +# An NBD block export (options shared between nbd-server-add and the NBD b= ranch +# of block-export-add). # # @name: Export name. If unspecified, the @device parameter is used as the # export name. (Since 2.12) @@ -85,8 +84,21 @@ # Since: 5.0 ## { 'struct': 'BlockExportOptionsNbd', - 'data': {'device': 'str', '*name': 'str', '*description': 'str', - '*writable': 'bool', '*bitmap': 'str' } } + 'data': { '*name': 'str', '*description': 'str', + '*writable': 'bool', '*bitmap': 'str' } } + +## +# @NbdServerAddOptions: +# +# An NBD block export. +# +# @device: The device name or node name of the node to be exported +# +# Since: 5.0 +## +{ 'struct': 'NbdServerAddOptions', + 'base': 'BlockExportOptionsNbd', + 'data': { 'device': 'str' } } =20 ## # @nbd-server-add: @@ -99,7 +111,7 @@ # Since: 1.3.0 ## { 'command': 'nbd-server-add', - 'data': 'BlockExportOptionsNbd', 'boxed': true } + 'data': 'NbdServerAddOptions', 'boxed': true } =20 ## # @NbdServerRemoveMode: @@ -170,6 +182,8 @@ # Describes a block export, i.e. how single node should be exported on an # external interface. # +# @node-name: The node name of the block node to be exported (since: 5.2) +# # @writethrough: If true, caches are flushed after every write request to = the # export before completion is signalled. (since: 5.2; # default: false) @@ -178,6 +192,7 @@ ## { 'union': 'BlockExportOptions', 'base': { 'type': 'BlockExportType', + 'node-name': 'str', '*writethrough': 'bool' }, 'discriminator': 'type', 'data': { diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c index 662b7f7d00..db357cafcb 100644 --- a/block/monitor/block-hmp-cmds.c +++ b/block/monitor/block-hmp-cmds.c @@ -398,7 +398,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qd= ict) Error *local_err =3D NULL; BlockInfoList *block_list, *info; SocketAddress *addr; - BlockExportOptionsNbd export; + NbdServerAddOptions export; =20 if (writable && !all) { error_setg(&local_err, "-w only valid together with -a"); @@ -431,7 +431,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qd= ict) continue; } =20 - export =3D (BlockExportOptionsNbd) { + export =3D (NbdServerAddOptions) { .device =3D info->value->device, .has_writable =3D true, .writable =3D writable, @@ -458,7 +458,7 @@ void hmp_nbd_server_add(Monitor *mon, const QDict *qdic= t) bool writable =3D qdict_get_try_bool(qdict, "writable", false); Error *local_err =3D NULL; =20 - BlockExportOptionsNbd export =3D { + NbdServerAddOptions export =3D { .device =3D (char *) device, .has_name =3D !!name, .name =3D (char *) name, diff --git a/blockdev-nbd.c b/blockdev-nbd.c index e208324d42..ef14303b25 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -188,7 +188,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_= args, Error **errp) } =20 if (!arg->has_name) { - arg->name =3D arg->device; + arg->name =3D exp_args->node_name; } =20 if (strlen(arg->name) > NBD_MAX_STRING_SIZE) { @@ -206,7 +206,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_= args, Error **errp) return NULL; } =20 - bs =3D bdrv_lookup_bs(arg->device, arg->device, errp); + bs =3D bdrv_lookup_bs(NULL, exp_args->node_name, errp); if (!bs) { return NULL; } @@ -244,21 +244,40 @@ BlockExport *nbd_export_create(BlockExportOptions *ex= p_args, Error **errp) return (BlockExport*) exp; } =20 -void qmp_nbd_server_add(BlockExportOptionsNbd *arg, Error **errp) +void qmp_nbd_server_add(NbdServerAddOptions *arg, Error **errp) { BlockExport *export; BlockDriverState *bs; BlockBackend *on_eject_blk; - BlockExportOptions export_opts; + BlockExportOptions *export_opts; =20 bs =3D bdrv_lookup_bs(arg->device, arg->device, errp); if (!bs) { return; } =20 - export_opts =3D (BlockExportOptions) { - .type =3D BLOCK_EXPORT_TYPE_NBD, - .u.nbd =3D *arg, + /* + * block-export-add would default to the node-name, but we may have to= use + * the device name as a default here for compatibility. + */ + if (!arg->has_name) { + arg->name =3D arg->device; + } + + export_opts =3D g_new(BlockExportOptions, 1); + *export_opts =3D (BlockExportOptions) { + .type =3D BLOCK_EXPORT_TYPE_NBD, + .node_name =3D g_strdup(bdrv_get_node_name(bs)), + .u.nbd =3D { + .has_name =3D true, + .name =3D g_strdup(arg->name), + .has_description =3D arg->has_description, + .description =3D g_strdup(arg->description), + .has_writable =3D arg->has_writable, + .writable =3D arg->writable, + .has_bitmap =3D arg->has_bitmap, + .bitmap =3D g_strdup(arg->bitmap), + }, }; =20 /* @@ -267,13 +286,13 @@ void qmp_nbd_server_add(BlockExportOptionsNbd *arg, E= rror **errp) * block-export-add. */ if (bdrv_is_read_only(bs)) { - export_opts.u.nbd.has_writable =3D true; - export_opts.u.nbd.writable =3D false; + export_opts->u.nbd.has_writable =3D true; + export_opts->u.nbd.writable =3D false; } =20 - export =3D blk_exp_add(&export_opts, errp); + export =3D blk_exp_add(export_opts, errp); if (!export) { - return; + goto fail; } =20 /* @@ -284,6 +303,9 @@ void qmp_nbd_server_add(BlockExportOptionsNbd *arg, Err= or **errp) if (on_eject_blk) { nbd_export_set_on_eject_blk(export, on_eject_blk); } + +fail: + qapi_free_BlockExportOptions(export_opts); } =20 void qmp_nbd_server_remove(const char *name, diff --git a/qemu-nbd.c b/qemu-nbd.c index a863741e8f..23c2b7da8e 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -1064,10 +1064,10 @@ int main(int argc, char **argv) export_opts =3D g_new(BlockExportOptions, 1); *export_opts =3D (BlockExportOptions) { .type =3D BLOCK_EXPORT_TYPE_NBD, + .node_name =3D g_strdup(bdrv_get_node_name(bs)), .has_writethrough =3D true, .writethrough =3D writethrough, .u.nbd =3D { - .device =3D g_strdup(bdrv_get_node_name(bs)), .has_name =3D true, .name =3D g_strdup(export_name), .has_description =3D !!export_description, --=20 2.25.4