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Duration for which a lock was held can be computed from the `Since` field of `OpsLockState`. It is the difference between current time and time at which the namespace lock was held. This change avoids superfluous instrumentation.
113 lines
4.1 KiB
Go
113 lines
4.1 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016, 2017 Minio, Inc.
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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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*/
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package cmd
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import "time"
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// SystemLockState - Structure to fill the lock state of entire object storage.
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// That is the total locks held, total calls blocked on locks and state of all the locks for the entire system.
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type SystemLockState struct {
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TotalLocks int64 `json:"totalLocks"`
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// Count of operations which are blocked waiting for the lock to
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// be released.
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TotalBlockedLocks int64 `json:"totalBlockedLocks"`
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// Count of operations which has successfully acquired the lock but
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// hasn't unlocked yet (operation in progress).
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TotalAcquiredLocks int64 `json:"totalAcquiredLocks"`
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LocksInfoPerObject []VolumeLockInfo `json:"locksInfoPerObject"`
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}
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// VolumeLockInfo - Structure to contain the lock state info for volume, path pair.
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type VolumeLockInfo struct {
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Bucket string `json:"bucket"`
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Object string `json:"object"`
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// All locks blocked + running for given <volume,path> pair.
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LocksOnObject int64 `json:"-"`
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// Count of operations which has successfully acquired the lock
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// but hasn't unlocked yet( operation in progress).
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LocksAcquiredOnObject int64 `json:"-"`
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// Count of operations which are blocked waiting for the lock
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// to be released.
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TotalBlockedLocks int64 `json:"-"`
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// Count of all read locks
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TotalReadLocks int64 `json:"readLocks"`
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// Count of all write locks
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TotalWriteLocks int64 `json:"writeLocks"`
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// State information containing state of the locks for all operations
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// on given <volume,path> pair.
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LockDetailsOnObject []OpsLockState `json:"lockOwners"`
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}
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// OpsLockState - structure to fill in state information of the lock.
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// structure to fill in status information for each operation with given operation ID.
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type OpsLockState struct {
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OperationID string `json:"id"` // String containing operation ID.
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LockSource string `json:"source"` // Operation type (GetObject, PutObject...)
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LockType lockType `json:"type"` // Lock type (RLock, WLock)
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Status statusType `json:"status"` // Status can be Running/Ready/Blocked.
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Since time.Time `json:"since"` // Time when the lock was initially held.
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}
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// listLocksInfo - Fetches locks held on bucket, matching prefix held for longer than duration.
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func listLocksInfo(bucket, prefix string, duration time.Duration) []VolumeLockInfo {
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globalNSMutex.lockMapMutex.Lock()
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defer globalNSMutex.lockMapMutex.Unlock()
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// Fetch current time once instead of fetching system time for every lock.
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timeNow := UTCNow()
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volumeLocks := []VolumeLockInfo{}
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for param, debugLock := range globalNSMutex.debugLockMap {
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if param.volume != bucket {
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continue
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}
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// N B empty prefix matches all param.path.
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if !hasPrefix(param.path, prefix) {
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continue
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}
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volLockInfo := VolumeLockInfo{
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Bucket: param.volume,
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Object: param.path,
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LocksOnObject: debugLock.counters.total,
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TotalBlockedLocks: debugLock.counters.blocked,
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LocksAcquiredOnObject: debugLock.counters.granted,
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}
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// Filter locks that are held on bucket, prefix.
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for opsID, lockInfo := range debugLock.lockInfo {
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// filter locks that were held for longer than duration.
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elapsed := timeNow.Sub(lockInfo.since)
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if elapsed < duration {
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continue
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}
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// Add locks that are held for longer than duration.
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volLockInfo.LockDetailsOnObject = append(volLockInfo.LockDetailsOnObject,
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OpsLockState{
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OperationID: opsID,
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LockSource: lockInfo.lockSource,
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LockType: lockInfo.lType,
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Status: lockInfo.status,
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Since: lockInfo.since,
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})
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volumeLocks = append(volumeLocks, volLockInfo)
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}
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}
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return volumeLocks
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}
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