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3802dd2c2c
The go-ceph rbd package provides the GroupSnapGetInfo function, but it may return ErrUnsupported when called. Returning this error after advertising the support for VolumeGroupSnapshot seems ugly. In order to advertise support for VolumeGroupSnapshot, SupportsGroupSnapGetInfo() can be used, which detects the required C function of librbd. Signed-off-by: Niels de Vos <ndevos@ibm.com>
59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
/*
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Copyright 2024 The Ceph-CSI Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package features
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/*
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#cgo LDFLAGS: -lrbd
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#include <rbd/librbd.h>
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*/
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import "C"
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import (
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"strings"
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"sync"
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)
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var (
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groupGetSnapInfoOnce sync.Once
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errGroupGetSnapInfo error
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groupGetSnapInfoSupported = false
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)
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// SupportsGroupSnapGetInfo detects if librbd has the rbd_group_snap_get_info
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// function.
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func SupportsGroupSnapGetInfo() (bool, error) {
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groupGetSnapInfoOnce.Do(func() {
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// make sure librbd.so.x is loaded, might not (yet) be the case
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// if no rbd functions are called
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var opts C.rbd_image_options_t
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//nolint:gocritic // ignore result of rbd_image_options functions
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C.rbd_image_options_create(&opts)
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C.rbd_image_options_destroy(opts)
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// check for rbd_group_snap_get_info() in loaded libs/symbols
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errGroupGetSnapInfo = dlsym("rbd_group_snap_get_info")
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if errGroupGetSnapInfo == nil {
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groupGetSnapInfoSupported = true
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} else if strings.Contains(errGroupGetSnapInfo.Error(), "undefined symbol") {
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errGroupGetSnapInfo = nil
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}
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})
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return groupGetSnapInfoSupported, errGroupGetSnapInfo
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}
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