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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| // Copyright 2019 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| // +build !windows | ||
|
|
||
| package utils | ||
|
|
||
| import ( | ||
| "reflect" | ||
|
|
||
| "golang.org/x/sys/unix" | ||
|
|
||
| "github.com/pingcap/dm/pkg/terror" | ||
| ) | ||
|
|
||
| // GetStorageSize gets storage's capacity and available size | ||
| func GetStorageSize(dir string) (size StorageSize, err error) { | ||
| var stat unix.Statfs_t | ||
|
|
||
| err = unix.Statfs(dir, &stat) | ||
| if err != nil { | ||
| return size, terror.ErrStatFileSize.Delegate(err) | ||
| } | ||
|
|
||
| // When container is run in MacOS, `bsize` obtained by `statfs` syscall is not the fundamental block size, | ||
| // but the `iosize` (optimal transfer block size) instead, it's usually 1024 times larger than the `bsize`. | ||
| // for example `4096 * 1024`. To get the correct block size, we should use `frsize`. But `frsize` isn't | ||
| // guaranteed to be supported everywhere, so we need to check whether it's supported before use it. | ||
| // For more details, please refer to: https://github.com/docker/for-mac/issues/2136 | ||
| bSize := uint64(stat.Bsize) | ||
| field := reflect.ValueOf(&stat).Elem().FieldByName("Frsize") | ||
| if field.IsValid() { | ||
| if field.Kind() == reflect.Uint64 { | ||
| bSize = field.Uint() | ||
| } else { | ||
| bSize = uint64(field.Int()) | ||
| } | ||
| } | ||
|
|
||
| // Available blocks * size per block = available space in bytes | ||
| size.Available = stat.Bavail * bSize | ||
| size.Capacity = stat.Blocks * bSize | ||
|
|
||
| return | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| // Copyright 2019 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| // +build windows | ||
|
|
||
| package utils | ||
|
|
||
| import ( | ||
| "syscall" | ||
| "unsafe" | ||
|
|
||
| "github.com/pingcap/dm/pkg/terror" | ||
| ) | ||
|
|
||
| var ( | ||
| kernel32 = syscall.MustLoadDLL("kernel32.dll") | ||
| getDiskFreeSpaceExW = kernel32.MustFindProc("GetDiskFreeSpaceExW") | ||
| ) | ||
|
|
||
| // GetStorageSize gets storage's capacity and available size | ||
| func GetStorageSize(dir string) (size StorageSize, err error) { | ||
| r, _, e := getDiskFreeSpaceExW.Call( | ||
| uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(dir))), | ||
| uintptr(unsafe.Pointer(&size.Available)), | ||
| uintptr(unsafe.Pointer(&size.Capacity)), | ||
| 0, | ||
| ) | ||
| if r == 0 { | ||
| err = terror.ErrStatFileSize.Delegate(e) | ||
| } | ||
| return | ||
| } |
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