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bh=p8+wXt46aADpCxQohqhH82gdAxWcUq+sbQryO7wOejY=; b=M2PVK5qEN0QlxPZ8THDArWOAMFZxGGpLJXvfme2FG6Y7A3Ux20vW8uDoaGQcMocn7EbUty UtCX+h5k7uS/xD4Z6yfFMqe+EwFIBRddnML5mYQn4psrIhlMyn9OWgDl/xcnUXgo92a+vL nvMyZu1nFgLFUilsnKyARHDwM//XT8s= X-MC-Unique: hV10kG2iNg6DAr5AlD2UjQ-1 From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH v2 21/31] block/export: Add BLOCK_EXPORT_DELETED event Date: Thu, 24 Sep 2020 17:27:07 +0200 Message-Id: <20200924152717.287415-22-kwolf@redhat.com> In-Reply-To: <20200924152717.287415-1-kwolf@redhat.com> References: <20200924152717.287415-1-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 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" Clients may want to know when an export has finally disappeard (block-export-del returns earlier than that in the general case), so add a QAPI event for it. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- qapi/block-export.json | 12 ++++++++++++ block/export/export.c | 2 ++ tests/qemu-iotests/140 | 9 ++++++++- tests/qemu-iotests/140.out | 2 +- tests/qemu-iotests/223.out | 4 ++++ 5 files changed, 27 insertions(+), 2 deletions(-) diff --git a/qapi/block-export.json b/qapi/block-export.json index 0ba4d84c97..3551c2e748 100644 --- a/qapi/block-export.json +++ b/qapi/block-export.json @@ -233,3 +233,15 @@ ## { 'command': 'block-export-del', 'data': { 'id': 'str', '*mode': 'BlockExportRemoveMode' } } + +## +# @BLOCK_EXPORT_DELETED: +# +# Emitted when a block export is removed and its id can be reused. +# +# @id: Block export id. +# +# Since: 5.2 +## +{ 'event': 'BLOCK_EXPORT_DELETED', + 'data': { 'id': 'str' } } diff --git a/block/export/export.c b/block/export/export.c index d186beffe9..87940d5c40 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -19,6 +19,7 @@ #include "block/nbd.h" #include "qapi/error.h" #include "qapi/qapi-commands-block-export.h" +#include "qapi/qapi-events-block-export.h" #include "qemu/id.h" =20 static const BlockExportDriver *blk_exp_drivers[] =3D { @@ -113,6 +114,7 @@ static void blk_exp_delete_bh(void *opaque) assert(exp->refcount =3D=3D 0); QLIST_REMOVE(exp, next); exp->drv->delete(exp); + qapi_event_send_block_export_deleted(exp->id); g_free(exp->id); g_free(exp); =20 diff --git a/tests/qemu-iotests/140 b/tests/qemu-iotests/140 index 8d2ce5d9e3..309b177e77 100755 --- a/tests/qemu-iotests/140 +++ b/tests/qemu-iotests/140 @@ -81,10 +81,17 @@ $QEMU_IO_PROG -f raw -r -c 'read -P 42 0 64k' \ "nbd+unix:///drv?socket=3D$SOCK_DIR/nbd" 2>&1 \ | _filter_qemu_io | _filter_nbd =20 +# The order of 'return' and the BLOCK_EXPORT_DELETED event is undefined. J= ust +# wait until we've twice seen one of them. Filter the 'return' line out so= that +# the output is defined. _send_qemu_cmd $QEMU_HANDLE \ "{ 'execute': 'eject', 'arguments': { 'device': 'drv' }}" \ - 'return' + 'return\|BLOCK_EXPORT_DELETED' | + grep -v 'return' + +_send_qemu_cmd $QEMU_HANDLE '' 'return\|BLOCK_EXPORT_DELETED' | + grep -v 'return' =20 $QEMU_IO_PROG -f raw -r -c close \ "nbd+unix:///drv?socket=3D$SOCK_DIR/nbd" 2>&1 \ diff --git a/tests/qemu-iotests/140.out b/tests/qemu-iotests/140.out index 86b985da75..62d9c3ab3c 100644 --- a/tests/qemu-iotests/140.out +++ b/tests/qemu-iotests/140.out @@ -11,7 +11,7 @@ wrote 65536/65536 bytes at offset 0 read 65536/65536 bytes at offset 0 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) { 'execute': 'eject', 'arguments': { 'device': 'drv' }} -{"return": {}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_EXPORT_DELETED", "data": {"id": "drv"}} qemu-io: can't open device nbd+unix:///drv?socket=3DSOCK_DIR/nbd: Requeste= d export not available server reported: export 'drv' not present { 'execute': 'quit' } diff --git a/tests/qemu-iotests/223.out b/tests/qemu-iotests/223.out index 31ce9e6fe0..f6eac23f04 100644 --- a/tests/qemu-iotests/223.out +++ b/tests/qemu-iotests/223.out @@ -102,8 +102,10 @@ read 2097152/2097152 bytes at offset 2097152 {"execute":"nbd-server-remove", "arguments":{"name":"n"}} {"return": {}} {"execute":"nbd-server-remove", "arguments":{"name":"n2"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_EXPORT_DELETED", "data": {"id": "n"}} {"return": {}} {"execute":"nbd-server-remove", "arguments":{"name":"n2"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_EXPORT_DELETED", "data": {"id": "n2"}} {"error": {"class": "GenericError", "desc": "Export 'n2' is not found"}} {"execute":"nbd-server-stop"} {"return": {}} @@ -183,8 +185,10 @@ read 2097152/2097152 bytes at offset 2097152 {"execute":"nbd-server-remove", "arguments":{"name":"n"}} {"return": {}} {"execute":"nbd-server-remove", "arguments":{"name":"n2"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_EXPORT_DELETED", "data": {"id": "n"}} {"return": {}} {"execute":"nbd-server-remove", "arguments":{"name":"n2"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_EXPORT_DELETED", "data": {"id": "n2"}} {"error": {"class": "GenericError", "desc": "Export 'n2' is not found"}} {"execute":"nbd-server-stop"} {"return": {}} --=20 2.25.4