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Top Locks command implementation (#7052)

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API to list locks used in distributed XL mode
This commit is contained in:
kannappanr
2019-01-24 07:22:14 -08:00
committed by GitHub
parent 964e354d06
commit ce870466ff
19 changed files with 512 additions and 151 deletions
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58
cmd/local-locker.go
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@@ -1,5 +1,5 @@
/*
* Minio Cloud Storage, (C) 2018 Minio, Inc.
* Minio Cloud Storage, (C) 2018, 2019 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -26,17 +26,18 @@ import (
// lockRequesterInfo stores various info from the client for each lock that is requested.
type lockRequesterInfo struct {
writer bool // Bool whether write or read lock.
node string // Network address of client claiming lock.
serviceEndpoint string // RPC path of client claiming lock.
uid string // UID to uniquely identify request of client.
timestamp time.Time // Timestamp set at the time of initialization.
timeLastCheck time.Time // Timestamp for last check of validity of lock.
Writer bool // Bool whether write or read lock.
Node string // Network address of client claiming lock.
ServiceEndpoint string // RPC path of client claiming lock.
UID string // UID to uniquely identify request of client.
Timestamp time.Time // Timestamp set at the time of initialization.
TimeLastCheck time.Time // Timestamp for last check of validity of lock.
Source string // Contains line, function and filename reqesting the lock.
}
// isWriteLock returns whether the lock is a write or read lock.
func isWriteLock(lri []lockRequesterInfo) bool {
return len(lri) == 1 && lri[0].writer
return len(lri) == 1 && lri[0].Writer
}
// localLocker implements Dsync.NetLocker
@@ -62,12 +63,13 @@ func (l *localLocker) Lock(args dsync.LockArgs) (reply bool, err error) {
if !isLockTaken { // No locks held on the given name, so claim write lock
l.lockMap[args.Resource] = []lockRequesterInfo{
{
writer: true,
node: args.ServerAddr,
serviceEndpoint: args.ServiceEndpoint,
uid: args.UID,
timestamp: UTCNow(),
timeLastCheck: UTCNow(),
Writer: true,
Node: args.ServerAddr,
ServiceEndpoint: args.ServiceEndpoint,
Source: args.Source,
UID: args.UID,
Timestamp: UTCNow(),
TimeLastCheck: UTCNow(),
},
}
}
@@ -98,12 +100,13 @@ func (l *localLocker) RLock(args dsync.LockArgs) (reply bool, err error) {
l.mutex.Lock()
defer l.mutex.Unlock()
lrInfo := lockRequesterInfo{
writer: false,
node: args.ServerAddr,
serviceEndpoint: args.ServiceEndpoint,
uid: args.UID,
timestamp: UTCNow(),
timeLastCheck: UTCNow(),
Writer: false,
Node: args.ServerAddr,
ServiceEndpoint: args.ServiceEndpoint,
Source: args.Source,
UID: args.UID,
Timestamp: UTCNow(),
TimeLastCheck: UTCNow(),
}
if lri, ok := l.lockMap[args.Resource]; ok {
if reply = !isWriteLock(lri); reply {
@@ -149,3 +152,18 @@ func (l *localLocker) ForceUnlock(args dsync.LockArgs) (reply bool, err error) {
}
return true, nil
}
func (l *localLocker) DupLockMap() map[string][]lockRequesterInfo {
l.mutex.Lock()
defer l.mutex.Unlock()
lockCopy := make(map[string][]lockRequesterInfo)
for k, v := range l.lockMap {
var lockSlice []lockRequesterInfo
for _, lockInfo := range v {
lockSlice = append(lockSlice, lockInfo)
}
lockCopy[k] = lockSlice
}
return lockCopy
}