mirror of https://github.com/goharbor/harbor.git
80 lines
2.3 KiB
Go
80 lines
2.3 KiB
Go
// Copyright Project Harbor Authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package filesystem
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import (
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"os"
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"reflect"
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"syscall"
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storage "github.com/goharbor/harbor/src/adminserver/systeminfo/imagestorage"
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"github.com/goharbor/harbor/src/common/utils/log"
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)
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const (
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driverName = "filesystem"
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)
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type driver struct {
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path string
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}
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// NewDriver returns an instance of filesystem driver
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func NewDriver(path string) storage.Driver {
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return &driver{
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path: path,
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}
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}
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// Name returns a human-readable name of the fielsystem driver
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func (d *driver) Name() string {
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return driverName
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}
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// Cap returns the capacity of the filesystem storage
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func (d *driver) Cap() (*storage.Capacity, error) {
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var stat syscall.Statfs_t
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if _, err := os.Stat(d.path); os.IsNotExist(err) {
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// Return zero value if the path does not exist.
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log.Warningf("The path %s is not found, will return zero value of capacity", d.path)
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return &storage.Capacity{Total: 0, Free: 0}, nil
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}
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err := syscall.Statfs(d.path, &stat)
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if err != nil {
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return nil, err
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}
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// When container is run in MacOS, `bsize` obtained by `statfs` syscall is not the fundamental block size,
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// but the `iosize` (optimal transfer block size) instead, it's usually 1024 times larger than the `bsize`.
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// for example `4096 * 1024`. To get the correct block size, we should use `frsize`. But `frsize` isn't
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// guaranteed to be supported everywhere, so we need to check whether it's supported before use it.
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// For more details, please refer to: https://github.com/docker/for-mac/issues/2136
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bSize := uint64(stat.Bsize)
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field := reflect.ValueOf(&stat).Elem().FieldByName("Frsize")
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if field.IsValid() {
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if field.Kind() == reflect.Uint64 {
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bSize = field.Uint()
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} else {
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bSize = uint64(field.Int())
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}
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}
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return &storage.Capacity{
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Total: stat.Blocks * bSize,
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Free: stat.Bavail * bSize,
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}, nil
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}
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