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Merge pull request #286 from BigVan/main
[Feat.] support 'prjquota' for rootfs
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Original file line number | Diff line number | Diff line change |
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//go:build linux | ||
// +build linux | ||
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/* | ||
Copyright The Accelerated Container Image Authors | ||
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, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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package diskquota | ||
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import ( | ||
"fmt" | ||
"math" | ||
"path" | ||
"strconv" | ||
"strings" | ||
"sync" | ||
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"github.com/docker/go-units" | ||
"github.com/pkg/errors" | ||
"github.com/sirupsen/logrus" | ||
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"github.com/containerd/containerd/mount" | ||
) | ||
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const ( | ||
// QuotaMinID represents the minimum quota id. | ||
// The value is unit32(2^24). | ||
QuotaMinID = uint32(16777216) | ||
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// QuotaMaxID represents the maximum quota id. | ||
QuotaMaxID = uint32(200000000) | ||
) | ||
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func safeConvertToUInt32(strVal string) (uint32, error) { | ||
intVal, err := strconv.Atoi(strVal) | ||
if err != nil { | ||
return 0, fmt.Errorf("failed to parse integer: %w", err) | ||
} | ||
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// Check if the value is within the uint32 range and is non-negative. | ||
if intVal < 0 || intVal > math.MaxUint32 { | ||
return 0, fmt.Errorf("value %d is out of range for uint32", intVal) | ||
} | ||
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return uint32(intVal), nil | ||
} | ||
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// SetDiskQuotaBytes set dir project quota to the quotaId | ||
func SetDiskQuotaBytes(dir string, limit int64, quotaID uint32) error { | ||
driver := &PrjQuotaDriver{} | ||
mountPoint, hasQuota, err := driver.CheckMountpoint(dir) | ||
if err != nil { | ||
return err | ||
} | ||
if !hasQuota { | ||
// no need to remount option prjquota for mountpoint | ||
return fmt.Errorf("mountpoint: (%s) not enable prjquota", mountPoint) | ||
} | ||
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if err := checkDevLimit(mountPoint, uint64(limit)); err != nil { | ||
return errors.Wrapf(err, "failed to check device limit, dir: (%s), limit: (%d)kb", dir, limit) | ||
} | ||
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err = driver.SetFileAttr(dir, quotaID) | ||
if err != nil { | ||
return errors.Wrapf(err, "failed to set subtree, dir: (%s), quota id: (%d)", dir, quotaID) | ||
} | ||
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return driver.setQuota(quotaID, uint64(limit/1024), mountPoint) | ||
} | ||
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// PrjQuotaDriver represents project quota driver. | ||
type PrjQuotaDriver struct { | ||
lock sync.Mutex | ||
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// quotaIDs saves all of quota ids. | ||
// key: quota ID which means this ID is used in the global scope. | ||
// value: stuct{} | ||
QuotaIDs map[uint32]struct{} | ||
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// lastID is used to mark last used quota ID. | ||
// quota ID is allocated increasingly by sequence one by one. | ||
LastID uint32 | ||
} | ||
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// SetDiskQuota uses the following two parameters to set disk quota for a directory. | ||
// * quota size: a byte size of requested quota. | ||
// * quota ID: an ID represent quota attr which is used in the global scope. | ||
func (quota *PrjQuotaDriver) SetDiskQuota(dir string, size string, quotaID uint32) error { | ||
mountPoint, hasQuota, err := quota.CheckMountpoint(dir) | ||
if err != nil { | ||
return err | ||
} | ||
if !hasQuota { | ||
// no need to remount option prjquota for mountpoint | ||
return fmt.Errorf("mountpoint: (%s) not enable prjquota", mountPoint) | ||
} | ||
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limit, err := units.RAMInBytes(size) | ||
if err != nil { | ||
return errors.Wrapf(err, "failed to change size: (%s) to kilobytes", size) | ||
} | ||
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if err := checkDevLimit(mountPoint, uint64(limit)); err != nil { | ||
return errors.Wrapf(err, "failed to check device limit, dir: (%s), limit: (%d)kb", dir, limit) | ||
} | ||
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err = quota.SetFileAttr(dir, quotaID) | ||
if err != nil { | ||
return errors.Wrapf(err, "failed to set subtree, dir: (%s), quota id: (%d)", dir, quotaID) | ||
} | ||
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return quota.setQuota(quotaID, uint64(limit/1024), mountPoint) | ||
} | ||
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func (quota *PrjQuotaDriver) CheckMountpoint(dir string) (string, bool, error) { | ||
mountInfo, err := mount.Lookup(dir) | ||
if err != nil { | ||
return "", false, errors.Wrapf(err, "failed to get mount info, dir(%s)", dir) | ||
} | ||
if strings.Contains(mountInfo.VFSOptions, "prjquota") { | ||
return mountInfo.Mountpoint, true, nil | ||
} | ||
return mountInfo.Mountpoint, false, nil | ||
} | ||
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// setQuota uses system tool "setquota" to set project quota for binding of limit and mountpoint and quotaID. | ||
// * quotaID: quota ID which means this ID is used in the global scope. | ||
// * blockLimit: block limit number for mountpoint. | ||
// * mountPoint: the mountpoint of the device in the filesystem | ||
// ext4: setquota -P qid $softlimit $hardlimit $softinode $hardinode mountpoint | ||
func (quota *PrjQuotaDriver) setQuota(quotaID uint32, blockLimit uint64, mountPoint string) error { | ||
quotaIDStr := strconv.FormatUint(uint64(quotaID), 10) | ||
blockLimitStr := strconv.FormatUint(blockLimit, 10) | ||
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// ext4 set project quota limit | ||
// logrus.Infof("setquota -P %s 0 %s 0 0 %s", quotaIDStr, blockLimitStr, mountPoint) | ||
stdout, stderr, err := ExecSync("setquota", "-P", quotaIDStr, "0", blockLimitStr, "0", "0", mountPoint) | ||
if err != nil { | ||
return errors.Wrapf(err, "failed to set quota, mountpoint: (%s), quota id: (%d), quota: (%d kbytes), stdout: (%s), stderr: (%s)", | ||
mountPoint, quotaID, blockLimit, stdout, stderr) | ||
} | ||
return nil | ||
} | ||
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// GetQuotaIDInFileAttr gets attributes of the file which is in the inode. | ||
// The returned result is quota ID. | ||
// return 0 if failure happens, since quota ID must be positive. | ||
// execution command: `lsattr -p $dir` | ||
func (quota *PrjQuotaDriver) GetQuotaIDInFileAttr(dir string) uint32 { | ||
parent := path.Dir(dir) | ||
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stdout, _, err := ExecSync("lsattr", "-p", parent) | ||
if err != nil { | ||
// failure, then return invalid value 0 for quota ID. | ||
return 0 | ||
} | ||
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// example output: | ||
// 16777256 --------------e---P ./exampleDir | ||
lines := strings.Split(stdout, "\n") | ||
for _, line := range lines { | ||
parts := strings.Split(line, " ") | ||
if len(parts) > 2 && parts[2] == dir { | ||
// find the corresponding quota ID, return directly. | ||
qid, _ := safeConvertToUInt32(parts[0]) | ||
return qid | ||
} | ||
} | ||
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return 0 | ||
} | ||
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// GetNextQuotaID returns the next available quota id. | ||
func (quota *PrjQuotaDriver) GetNextQuotaID() (quotaID uint32, err error) { | ||
quota.lock.Lock() | ||
defer quota.lock.Unlock() | ||
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if quota.LastID == 0 { | ||
quota.QuotaIDs, quota.LastID, err = loadQuotaIDs("-Pan") | ||
if err != nil { | ||
return 0, errors.Wrap(err, "failed to load quota list") | ||
} | ||
} | ||
id := quota.LastID | ||
for { | ||
if id < QuotaMinID { | ||
id = QuotaMinID | ||
} | ||
id++ | ||
if _, ok := quota.QuotaIDs[id]; !ok { | ||
if id <= QuotaMaxID { | ||
break | ||
} | ||
logrus.Infof("reach the maximum, try to reuse quotaID") | ||
quota.QuotaIDs, quota.LastID, err = loadQuotaIDs("-Pan") | ||
if err != nil { | ||
return 0, errors.Wrap(err, "failed to load quota list") | ||
} | ||
id = quota.LastID | ||
} | ||
} | ||
quota.QuotaIDs[id] = struct{}{} | ||
quota.LastID = id | ||
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return id, nil | ||
} | ||
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// SetFileAttr set the file attr. | ||
// ext4: chattr -p quotaid +P $DIR | ||
func (quota *PrjQuotaDriver) SetFileAttr(dir string, quotaID uint32) error { | ||
strID := strconv.FormatUint(uint64(quotaID), 10) | ||
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// ext4 use chattr to change project id | ||
stdout, stderr, err := ExecSync("chattr", "-p", strID, "+P", dir) | ||
if err != nil { | ||
return errors.Wrapf(err, "failed to set file(%s) quota id(%s), stdout: (%s), stderr: (%s)", | ||
dir, strID, stdout, stderr) | ||
} | ||
logrus.Debugf("set quota id (%s) to file (%s) attr", strID, dir) | ||
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return nil | ||
} |
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