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blockdev-nbd: Boxed argument type for nbd-server-add

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Move the arguments of nbd-server-add to a new struct BlockExportNbd and
convert the command to 'boxed': true. This makes it easier to share code
with the storage daemon.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200224143008.13362-11-kwolf@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2020-02-24 15:29:58 +01:00
parent eed8b69178
commit c62d24e906
3 changed files with 47 additions and 27 deletions
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35
blockdev-nbd.c
View file

@ -148,10 +148,7 @@ void qmp_nbd_server_start(SocketAddressLegacy *addr,
qapi_free_SocketAddress(addr_flat);
}
void qmp_nbd_server_add(const char *device, bool has_name, const char *name,
bool has_description, const char *description,
bool has_writable, bool writable,
bool has_bitmap, const char *bitmap, Error **errp)
void qmp_nbd_server_add(BlockExportNbd *arg, Error **errp)
{
BlockDriverState *bs = NULL;
BlockBackend *on_eject_blk;
@ -164,28 +161,28 @@ void qmp_nbd_server_add(const char *device, bool has_name, const char *name,
return;
}
if (!has_name) {
name = device;
if (!arg->has_name) {
arg->name = arg->device;
}
if (strlen(name) > NBD_MAX_STRING_SIZE) {
error_setg(errp, "export name '%s' too long", name);
if (strlen(arg->name) > NBD_MAX_STRING_SIZE) {
error_setg(errp, "export name '%s' too long", arg->name);
return;
}
if (has_description && strlen(description) > NBD_MAX_STRING_SIZE) {
error_setg(errp, "description '%s' too long", description);
if (arg->description && strlen(arg->description) > NBD_MAX_STRING_SIZE) {
error_setg(errp, "description '%s' too long", arg->description);
return;
}
if (nbd_export_find(name)) {
error_setg(errp, "NBD server already has export named '%s'", name);
if (nbd_export_find(arg->name)) {
error_setg(errp, "NBD server already has export named '%s'", arg->name);
return;
}
on_eject_blk = blk_by_name(device);
on_eject_blk = blk_by_name(arg->device);
bs = bdrv_lookup_bs(device, device, errp);
bs = bdrv_lookup_bs(arg->device, arg->device, errp);
if (!bs) {
return;
}
@ -199,15 +196,15 @@ void qmp_nbd_server_add(const char *device, bool has_name, const char *name,
goto out;
}
if (!has_writable) {
writable = false;
if (!arg->has_writable) {
arg->writable = false;
}
if (bdrv_is_read_only(bs)) {
writable = false;
arg->writable = false;
}
exp = nbd_export_new(bs, 0, len, name, description, bitmap,
!writable, !writable,
exp = nbd_export_new(bs, 0, len, arg->name, arg->description, arg->bitmap,
!arg->writable, !arg->writable,
NULL, false, on_eject_blk, errp);
if (!exp) {
goto out;

21
monitor/hmp-cmds.c
View file

@ -2341,6 +2341,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qdict)
Error *local_err = NULL;
BlockInfoList *block_list, *info;
SocketAddress *addr;
BlockExportNbd export;
if (writable && !all) {
error_setg(&local_err, "-w only valid together with -a");
@ -2373,8 +2374,13 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qdict)
continue;
}
qmp_nbd_server_add(info->value->device, false, NULL, false, NULL,
true, writable, false, NULL, &local_err);
export = (BlockExportNbd) {
.device = info->value->device,
.has_writable = true,
.writable = writable,
};
qmp_nbd_server_add(&export, &local_err);
if (local_err != NULL) {
qmp_nbd_server_stop(NULL);
@ -2395,8 +2401,15 @@ void hmp_nbd_server_add(Monitor *mon, const QDict *qdict)
bool writable = qdict_get_try_bool(qdict, "writable", false);
Error *local_err = NULL;
qmp_nbd_server_add(device, !!name, name, false, NULL, true, writable,
false, NULL, &local_err);
BlockExportNbd export = {
.device = (char *) device,
.has_name = !!name,
.name = (char *) name,
.has_writable = true,
.writable = writable,
};
qmp_nbd_server_add(&export, &local_err);
hmp_handle_error(mon, local_err);
}

18
qapi/block-core.json
View file

@ -5112,9 +5112,9 @@
'*tls-authz': 'str'} }
##
# @nbd-server-add:
# @BlockExportNbd:
#
# Export a block node to QEMU's embedded NBD server.
# An NBD block export.
#
# @device: The device name or node name of the node to be exported
#
@ -5131,14 +5131,24 @@
# NBD client can use NBD_OPT_SET_META_CONTEXT with
# "qemu:dirty-bitmap:NAME" to inspect the bitmap. (since 4.0)
#
# Since: 5.0
##
{ 'struct': 'BlockExportNbd',
'data': {'device': 'str', '*name': 'str', '*description': 'str',
'*writable': 'bool', '*bitmap': 'str' } }
##
# @nbd-server-add:
#
# Export a block node to QEMU's embedded NBD server.
#
# Returns: error if the server is not running, or export with the same name
# already exists.
#
# Since: 1.3.0
##
{ 'command': 'nbd-server-add',
'data': {'device': 'str', '*name': 'str', '*description': 'str',
'*writable': 'bool', '*bitmap': 'str' } }
'data': 'BlockExportNbd', 'boxed': true }
##
# @NbdServerRemoveMode: