dlmunlock.c revision 29004858a76ba9e26393dd8a85e653f105a33753
16714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel/* -*- mode: c; c-basic-offset: 8; -*- 26714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * vim: noexpandtab sw=8 ts=8 sts=0: 36714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * 46714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * dlmunlock.c 56714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * 66714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * underlying calls for unlocking locks 76714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * 86714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * Copyright (C) 2004 Oracle. All rights reserved. 96714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * 106714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * This program is free software; you can redistribute it and/or 116714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * modify it under the terms of the GNU General Public 126714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * License as published by the Free Software Foundation; either 136714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * version 2 of the License, or (at your option) any later version. 146714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * 156714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * This program is distributed in the hope that it will be useful, 166714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * but WITHOUT ANY WARRANTY; without even the implied warranty of 176714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 186714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * General Public License for more details. 196714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * 206714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * You should have received a copy of the GNU General Public 216714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * License along with this program; if not, write to the 226714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 236714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * Boston, MA 021110-1307, USA. 246714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * 256714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel */ 266714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 276714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 286714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/module.h> 296714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/fs.h> 306714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/types.h> 316714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/slab.h> 326714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/highmem.h> 336714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/utsname.h> 346714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/init.h> 356714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/sysctl.h> 366714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/random.h> 376714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/blkdev.h> 386714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/socket.h> 396714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/inet.h> 406714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/spinlock.h> 416714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include <linux/delay.h> 426714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 436714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include "cluster/heartbeat.h" 446714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include "cluster/nodemanager.h" 456714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include "cluster/tcp.h" 466714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 476714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include "dlmapi.h" 486714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include "dlmcommon.h" 496714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 506714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#define MLOG_MASK_PREFIX ML_DLM 516714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#include "cluster/masklog.h" 526714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 536714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#define DLM_UNLOCK_FREE_LOCK 0x00000001 546714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#define DLM_UNLOCK_CALL_AST 0x00000002 556714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#define DLM_UNLOCK_REMOVE_LOCK 0x00000004 566714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#define DLM_UNLOCK_REGRANT_LOCK 0x00000008 576714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel#define DLM_UNLOCK_CLEAR_CONVERT_TYPE 0x00000010 586714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 596714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 606714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelstatic enum dlm_status dlm_get_cancel_actions(struct dlm_ctxt *dlm, 616714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock_resource *res, 626714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock, 636714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lockstatus *lksb, 646714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int *actions); 656714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelstatic enum dlm_status dlm_get_unlock_actions(struct dlm_ctxt *dlm, 666714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock_resource *res, 676714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock, 686714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lockstatus *lksb, 696714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int *actions); 706714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 716714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelstatic enum dlm_status dlm_send_remote_unlock_request(struct dlm_ctxt *dlm, 726714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock_resource *res, 736714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock, 746714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lockstatus *lksb, 756714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int flags, 766714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel u8 owner); 776714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 786714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 796714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel/* 806714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * according to the spec: 816714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * http://opendlm.sourceforge.net/cvsmirror/opendlm/docs/dlmbook_final.pdf 826714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * 836714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * flags & LKM_CANCEL != 0: must be converting or blocked 846714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * flags & LKM_CANCEL == 0: must be granted 856714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * 866714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * So to unlock a converting lock, you must first cancel the 876714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * convert (passing LKM_CANCEL in flags), then call the unlock 886714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * again (with no LKM_CANCEL in flags). 896714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel */ 906714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 916714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 926714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel/* 936714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * locking: 946714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * caller needs: none 956714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * taken: res->spinlock and lock->spinlock taken and dropped 966714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * held on exit: none 976714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * returns: DLM_NORMAL, DLM_NOLOCKMGR, status from network 986714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * all callers should have taken an extra ref on lock coming in 996714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel */ 1006714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelstatic enum dlm_status dlmunlock_common(struct dlm_ctxt *dlm, 1016714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock_resource *res, 1026714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock, 1036714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lockstatus *lksb, 1046714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int flags, int *call_ast, 1056714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int master_node) 1066714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel{ 1076714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel enum dlm_status status; 1086714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int actions = 0; 1096714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int in_use; 1106714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel u8 owner; 1116714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 1126714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "master_node = %d, valblk = %d\n", master_node, 1136714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel flags & LKM_VALBLK); 1146714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 1156714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (master_node) 1166714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel BUG_ON(res->owner != dlm->node_num); 1176714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel else 1186714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel BUG_ON(res->owner == dlm->node_num); 1196714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 1206714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_lock(&dlm->spinlock); 1216714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* We want to be sure that we're not freeing a lock 1226714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * that still has AST's pending... */ 1236714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel in_use = !list_empty(&lock->ast_list); 1246714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_unlock(&dlm->spinlock); 1256714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (in_use) { 1266714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(ML_ERROR, "lockres %.*s: Someone is calling dlmunlock " 1276714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel "while waiting for an ast!", res->lockname.len, 1286714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel res->lockname.name); 1296714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return DLM_BADPARAM; 1306714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 1316714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 1326714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_lock(&res->spinlock); 1336714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (res->state & DLM_LOCK_RES_IN_PROGRESS) { 1346714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (master_node) { 1356714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(ML_ERROR, "lockres in progress!\n"); 1366714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_unlock(&res->spinlock); 1376714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return DLM_FORWARD; 1386714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 1396714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* ok for this to sleep if not in a network handler */ 1406714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel __dlm_wait_on_lockres(res); 1416714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel res->state |= DLM_LOCK_RES_IN_PROGRESS; 1426714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 1436714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_lock(&lock->spinlock); 1446714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 1456714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (res->state & DLM_LOCK_RES_RECOVERING) { 1466714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_RECOVERING; 1476714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel goto leave; 1486714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 1496714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 1506714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 1516714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* see above for what the spec says about 1526714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * LKM_CANCEL and the lock queue state */ 1536714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (flags & LKM_CANCEL) 1546714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = dlm_get_cancel_actions(dlm, res, lock, lksb, &actions); 1556714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel else 1566714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = dlm_get_unlock_actions(dlm, res, lock, lksb, &actions); 1576714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 1586714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (status != DLM_NORMAL) 1596714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel goto leave; 1606714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 1616714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* By now this has been masked out of cancel requests. */ 1626714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (flags & LKM_VALBLK) { 1636714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* make the final update to the lvb */ 1646714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (master_node) 1656714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel memcpy(res->lvb, lksb->lvb, DLM_LVB_LEN); 1666714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel else 1676714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel flags |= LKM_PUT_LVB; /* let the send function 1686714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * handle it. */ 1696714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 1706714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 1716714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (!master_node) { 1726714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel owner = res->owner; 1736714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* drop locks and send message */ 1746714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (flags & LKM_CANCEL) 1756714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lock->cancel_pending = 1; 1766714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel else 1776714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lock->unlock_pending = 1; 1786714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_unlock(&lock->spinlock); 1796714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_unlock(&res->spinlock); 1806714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = dlm_send_remote_unlock_request(dlm, res, lock, lksb, 1816714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel flags, owner); 1826714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_lock(&res->spinlock); 1836714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_lock(&lock->spinlock); 1846714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* if the master told us the lock was already granted, 1856714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * let the ast handle all of these actions */ 1866714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (status == DLM_NORMAL && 1876714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->status == DLM_CANCELGRANT) { 1886714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel actions &= ~(DLM_UNLOCK_REMOVE_LOCK| 1896714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel DLM_UNLOCK_REGRANT_LOCK| 1906714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel DLM_UNLOCK_CLEAR_CONVERT_TYPE); 191e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel } else if (status == DLM_RECOVERING || 192e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel status == DLM_MIGRATING || 193e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel status == DLM_FORWARD) { 194e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel /* must clear the actions because this unlock 195e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel * is about to be retried. cannot free or do 196e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel * any list manipulation. */ 197e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel mlog(0, "%s:%.*s: clearing actions, %s\n", 198e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel dlm->name, res->lockname.len, 199e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel res->lockname.name, 200e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel status==DLM_RECOVERING?"recovering": 201e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel (status==DLM_MIGRATING?"migrating": 202e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel "forward")); 203e2faea4ce340f199c1957986c4c3dc2de76f5746Kurt Hackel actions = 0; 2046714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 2056714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (flags & LKM_CANCEL) 2066714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lock->cancel_pending = 0; 2076714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel else 2086714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lock->unlock_pending = 0; 2096714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2106714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 2116714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2126714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* get an extra ref on lock. if we are just switching 2136714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * lists here, we dont want the lock to go away. */ 2146714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lock_get(lock); 2156714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2166714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (actions & DLM_UNLOCK_REMOVE_LOCK) { 2176714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel list_del_init(&lock->list); 2186714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lock_put(lock); 2196714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 2206714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (actions & DLM_UNLOCK_REGRANT_LOCK) { 2216714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lock_get(lock); 2226714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel list_add_tail(&lock->list, &res->granted); 2236714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 2246714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (actions & DLM_UNLOCK_CLEAR_CONVERT_TYPE) { 2256714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "clearing convert_type at %smaster node\n", 2266714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel master_node ? "" : "non-"); 2276714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lock->ml.convert_type = LKM_IVMODE; 2286714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 2296714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2306714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* remove the extra ref on lock */ 2316714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lock_put(lock); 2326714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2336714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelleave: 2346714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel res->state &= ~DLM_LOCK_RES_IN_PROGRESS; 2356714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (!dlm_lock_on_list(&res->converting, lock)) 2366714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel BUG_ON(lock->ml.convert_type != LKM_IVMODE); 2376714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel else 2386714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel BUG_ON(lock->ml.convert_type == LKM_IVMODE); 2396714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_unlock(&lock->spinlock); 2406714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_unlock(&res->spinlock); 2416714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel wake_up(&res->wq); 2426714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2436714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* let the caller's final dlm_lock_put handle the actual kfree */ 2446714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (actions & DLM_UNLOCK_FREE_LOCK) { 2456714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* this should always be coupled with list removal */ 2466714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel BUG_ON(!(actions & DLM_UNLOCK_REMOVE_LOCK)); 24729004858a76ba9e26393dd8a85e653f105a33753Kurt Hackel mlog(0, "lock %u:%llu should be gone now! refs=%d\n", 24829004858a76ba9e26393dd8a85e653f105a33753Kurt Hackel dlm_get_lock_cookie_node(lock->ml.cookie), 24929004858a76ba9e26393dd8a85e653f105a33753Kurt Hackel dlm_get_lock_cookie_seq(lock->ml.cookie), 25029004858a76ba9e26393dd8a85e653f105a33753Kurt Hackel atomic_read(&lock->lock_refs.refcount)-1); 2516714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lock_put(lock); 2526714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 2536714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (actions & DLM_UNLOCK_CALL_AST) 2546714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel *call_ast = 1; 2556714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2566714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* if cancel or unlock succeeded, lvb work is done */ 2576714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (status == DLM_NORMAL) 2586714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->flags &= ~(DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB); 2596714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2606714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return status; 2616714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel} 2626714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2636714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelvoid dlm_commit_pending_unlock(struct dlm_lock_resource *res, 2646714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock) 2656714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel{ 2666714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* leave DLM_LKSB_PUT_LVB on the lksb so any final 2676714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * update of the lvb will be sent to the new master */ 2686714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel list_del_init(&lock->list); 2696714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel} 2706714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2716714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelvoid dlm_commit_pending_cancel(struct dlm_lock_resource *res, 2726714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock) 2736714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel{ 2746714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel list_del_init(&lock->list); 2756714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel list_add_tail(&lock->list, &res->granted); 2766714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lock->ml.convert_type = LKM_IVMODE; 2776714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel} 2786714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2796714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2806714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelstatic inline enum dlm_status dlmunlock_master(struct dlm_ctxt *dlm, 2816714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock_resource *res, 2826714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock, 2836714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lockstatus *lksb, 2846714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int flags, 2856714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int *call_ast) 2866714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel{ 2876714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return dlmunlock_common(dlm, res, lock, lksb, flags, call_ast, 1); 2886714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel} 2896714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2906714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelstatic inline enum dlm_status dlmunlock_remote(struct dlm_ctxt *dlm, 2916714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock_resource *res, 2926714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock, 2936714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lockstatus *lksb, 2946714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int flags, int *call_ast) 2956714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel{ 2966714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return dlmunlock_common(dlm, res, lock, lksb, flags, call_ast, 0); 2976714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel} 2986714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 2996714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel/* 3006714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * locking: 3016714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * caller needs: none 3026714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * taken: none 3036714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * held on exit: none 3046714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * returns: DLM_NORMAL, DLM_NOLOCKMGR, status from network 3056714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel */ 3066714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelstatic enum dlm_status dlm_send_remote_unlock_request(struct dlm_ctxt *dlm, 3076714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock_resource *res, 3086714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock, 3096714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lockstatus *lksb, 3106714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int flags, 3116714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel u8 owner) 3126714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel{ 3136714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_unlock_lock unlock; 3146714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int tmpret; 3156714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel enum dlm_status ret; 3166714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int status = 0; 3176714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct kvec vec[2]; 3186714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel size_t veclen = 1; 3196714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 3206714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog_entry("%.*s\n", res->lockname.len, res->lockname.name); 3216714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 3226714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel memset(&unlock, 0, sizeof(unlock)); 3236714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel unlock.node_idx = dlm->node_num; 3246714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel unlock.flags = cpu_to_be32(flags); 3256714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel unlock.cookie = lock->ml.cookie; 3266714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel unlock.namelen = res->lockname.len; 3276714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel memcpy(unlock.name, res->lockname.name, unlock.namelen); 3286714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 3296714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel vec[0].iov_len = sizeof(struct dlm_unlock_lock); 3306714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel vec[0].iov_base = &unlock; 3316714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 3326714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (flags & LKM_PUT_LVB) { 3336714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* extra data to send if we are updating lvb */ 3346714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel vec[1].iov_len = DLM_LVB_LEN; 3356714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel vec[1].iov_base = lock->lksb->lvb; 3366714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel veclen++; 3376714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 3386714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 3396714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel tmpret = o2net_send_message_vec(DLM_UNLOCK_LOCK_MSG, dlm->key, 3406714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel vec, veclen, owner, &status); 3416714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (tmpret >= 0) { 3426714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel // successfully sent and received 3436714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (status == DLM_CANCELGRANT) 3446714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel ret = DLM_NORMAL; 3456714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel else if (status == DLM_FORWARD) { 3466714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "master was in-progress. retry\n"); 3476714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel ret = DLM_FORWARD; 3486714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } else 3496714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel ret = status; 3506714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->status = status; 3516714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } else { 3526714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog_errno(tmpret); 3536714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (dlm_is_host_down(tmpret)) { 3546714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* NOTE: this seems strange, but it is what we want. 3556714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * when the master goes down during a cancel or 3566714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * unlock, the recovery code completes the operation 3576714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * as if the master had not died, then passes the 3586714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * updated state to the recovery master. this thread 3596714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * just needs to finish out the operation and call 3606714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * the unlockast. */ 3616714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel ret = DLM_NORMAL; 3626714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } else { 3636714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* something bad. this will BUG in ocfs2 */ 3646714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel ret = dlm_err_to_dlm_status(tmpret); 3656714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 3666714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->status = ret; 3676714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 3686714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 3696714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return ret; 3706714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel} 3716714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 3726714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel/* 3736714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * locking: 3746714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * caller needs: none 3756714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * taken: takes and drops res->spinlock 3766714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * held on exit: none 3776714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * returns: DLM_NORMAL, DLM_BADARGS, DLM_IVLOCKID, 3786714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * return value from dlmunlock_master 3796714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel */ 3806714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelint dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data) 3816714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel{ 3826714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_ctxt *dlm = data; 3836714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_unlock_lock *unlock = (struct dlm_unlock_lock *)msg->buf; 3846714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock_resource *res = NULL; 3856714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct list_head *iter; 3866714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock = NULL; 3876714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel enum dlm_status status = DLM_NORMAL; 3886714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int found = 0, i; 3896714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lockstatus *lksb = NULL; 3906714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int ignore; 3916714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel u32 flags; 3926714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct list_head *queue; 3936714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 3946714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel flags = be32_to_cpu(unlock->flags); 3956714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 3966714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (flags & LKM_GET_LVB) { 3976714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(ML_ERROR, "bad args! GET_LVB specified on unlock!\n"); 3986714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return DLM_BADARGS; 3996714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4006714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4016714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if ((flags & (LKM_PUT_LVB|LKM_CANCEL)) == (LKM_PUT_LVB|LKM_CANCEL)) { 4026714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(ML_ERROR, "bad args! cannot modify lvb on a CANCEL " 4036714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel "request!\n"); 4046714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return DLM_BADARGS; 4056714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4066714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4076714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (unlock->namelen > DLM_LOCKID_NAME_MAX) { 4086714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(ML_ERROR, "Invalid name length in unlock handler!\n"); 4096714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return DLM_IVBUFLEN; 4106714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4116714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4126714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (!dlm_grab(dlm)) 4136714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return DLM_REJECTED; 4146714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4156714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog_bug_on_msg(!dlm_domain_fully_joined(dlm), 4166714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel "Domain %s not fully joined!\n", dlm->name); 4176714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4186714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "lvb: %s\n", flags & LKM_PUT_LVB ? "put lvb" : "none"); 4196714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4206714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel res = dlm_lookup_lockres(dlm, unlock->name, unlock->namelen); 4216714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (!res) { 4226714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* We assume here that a no lock resource simply means 4236714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * it was migrated away and destroyed before the other 4246714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * node could detect it. */ 4256714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "returning DLM_FORWARD -- res no longer exists\n"); 4266714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_FORWARD; 4276714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel goto not_found; 4286714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4296714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4306714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel queue=&res->granted; 4316714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel found = 0; 4326714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_lock(&res->spinlock); 4336714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (res->state & DLM_LOCK_RES_RECOVERING) { 4346714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_unlock(&res->spinlock); 4356714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "returning DLM_RECOVERING\n"); 4366714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_RECOVERING; 4376714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel goto leave; 4386714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4396714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4406714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (res->state & DLM_LOCK_RES_MIGRATING) { 4416714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_unlock(&res->spinlock); 4426714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "returning DLM_MIGRATING\n"); 4436714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_MIGRATING; 4446714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel goto leave; 4456714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4466714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4476714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (res->owner != dlm->node_num) { 4486714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_unlock(&res->spinlock); 4496714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "returning DLM_FORWARD -- not master\n"); 4506714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_FORWARD; 4516714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel goto leave; 4526714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4536714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4546714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel for (i=0; i<3; i++) { 4556714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel list_for_each(iter, queue) { 4566714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lock = list_entry(iter, struct dlm_lock, list); 4576714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (lock->ml.cookie == unlock->cookie && 4586714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lock->ml.node == unlock->node_idx) { 4596714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lock_get(lock); 4606714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel found = 1; 4616714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel break; 4626714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4636714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4646714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (found) 4656714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel break; 4666714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* scan granted -> converting -> blocked queues */ 4676714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel queue++; 4686714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4696714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_unlock(&res->spinlock); 4706714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (!found) { 4716714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_IVLOCKID; 4726714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel goto not_found; 4736714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4746714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4756714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* lock was found on queue */ 4766714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb = lock->lksb; 4776714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* unlockast only called on originating node */ 4786714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (flags & LKM_PUT_LVB) { 4796714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->flags |= DLM_LKSB_PUT_LVB; 4806714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel memcpy(&lksb->lvb[0], &unlock->lvb[0], DLM_LVB_LEN); 4816714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 4826714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4836714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* if this is in-progress, propagate the DLM_FORWARD 4846714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * all the way back out */ 4856714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = dlmunlock_master(dlm, res, lock, lksb, flags, &ignore); 4866714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (status == DLM_FORWARD) 4876714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "lockres is in progress\n"); 4886714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4896714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (flags & LKM_PUT_LVB) 4906714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->flags &= ~DLM_LKSB_PUT_LVB; 4916714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4926714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lockres_calc_usage(dlm, res); 4936714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_kick_thread(dlm, res); 4946714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 4956714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelnot_found: 4966714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (!found) 4976714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(ML_ERROR, "failed to find lock to unlock! " 49829004858a76ba9e26393dd8a85e653f105a33753Kurt Hackel "cookie=%u:%llu\n", 49929004858a76ba9e26393dd8a85e653f105a33753Kurt Hackel dlm_get_lock_cookie_node(unlock->cookie), 50029004858a76ba9e26393dd8a85e653f105a33753Kurt Hackel dlm_get_lock_cookie_seq(unlock->cookie)); 5016714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel else { 5026714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* send the lksb->status back to the other node */ 5036714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = lksb->status; 5046714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lock_put(lock); 5056714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 5066714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5076714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelleave: 5086714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (res) 5096714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lockres_put(res); 5106714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5116714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_put(dlm); 5126714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5136714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return status; 5146714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel} 5156714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5166714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5176714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelstatic enum dlm_status dlm_get_cancel_actions(struct dlm_ctxt *dlm, 5186714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock_resource *res, 5196714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock, 5206714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lockstatus *lksb, 5216714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int *actions) 5226714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel{ 5236714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel enum dlm_status status; 5246714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5256714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (dlm_lock_on_list(&res->blocked, lock)) { 5266714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* cancel this outright */ 5276714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->status = DLM_NORMAL; 5286714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_NORMAL; 5296714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel *actions = (DLM_UNLOCK_CALL_AST | 5306714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel DLM_UNLOCK_REMOVE_LOCK); 5316714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } else if (dlm_lock_on_list(&res->converting, lock)) { 5326714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* cancel the request, put back on granted */ 5336714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->status = DLM_NORMAL; 5346714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_NORMAL; 5356714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel *actions = (DLM_UNLOCK_CALL_AST | 5366714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel DLM_UNLOCK_REMOVE_LOCK | 5376714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel DLM_UNLOCK_REGRANT_LOCK | 5386714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel DLM_UNLOCK_CLEAR_CONVERT_TYPE); 5396714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } else if (dlm_lock_on_list(&res->granted, lock)) { 5406714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* too late, already granted. DLM_CANCELGRANT */ 5416714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->status = DLM_CANCELGRANT; 5426714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_NORMAL; 5436714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel *actions = DLM_UNLOCK_CALL_AST; 5446714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } else { 5456714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(ML_ERROR, "lock to cancel is not on any list!\n"); 5466714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->status = DLM_IVLOCKID; 5476714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_IVLOCKID; 5486714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel *actions = 0; 5496714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 5506714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return status; 5516714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel} 5526714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5536714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelstatic enum dlm_status dlm_get_unlock_actions(struct dlm_ctxt *dlm, 5546714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock_resource *res, 5556714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock, 5566714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lockstatus *lksb, 5576714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int *actions) 5586714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel{ 5596714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel enum dlm_status status; 5606714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5616714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* unlock request */ 5626714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (!dlm_lock_on_list(&res->granted, lock)) { 5636714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->status = DLM_DENIED; 5646714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_DENIED; 5656714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_error(status); 5666714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel *actions = 0; 5676714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } else { 5686714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* unlock granted lock */ 5696714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lksb->status = DLM_NORMAL; 5706714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = DLM_NORMAL; 5716714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel *actions = (DLM_UNLOCK_FREE_LOCK | 5726714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel DLM_UNLOCK_CALL_AST | 5736714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel DLM_UNLOCK_REMOVE_LOCK); 5746714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 5756714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return status; 5766714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel} 5776714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5786714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel/* there seems to be no point in doing this async 5796714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * since (even for the remote case) there is really 5806714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * no work to queue up... so just do it and fire the 5816714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * unlockast by hand when done... */ 5826714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelenum dlm_status dlmunlock(struct dlm_ctxt *dlm, struct dlm_lockstatus *lksb, 5836714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int flags, dlm_astunlockfunc_t *unlockast, void *data) 5846714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel{ 5856714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel enum dlm_status status; 5866714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock_resource *res; 5876714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel struct dlm_lock *lock = NULL; 5886714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel int call_ast, is_master; 5896714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5906714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog_entry_void(); 5916714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5926714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (!lksb) { 5936714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_error(DLM_BADARGS); 5946714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return DLM_BADARGS; 5956714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 5966714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 5976714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (flags & ~(LKM_CANCEL | LKM_VALBLK | LKM_INVVALBLK)) { 5986714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_error(DLM_BADPARAM); 5996714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return DLM_BADPARAM; 6006714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 6016714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6026714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if ((flags & (LKM_VALBLK | LKM_CANCEL)) == (LKM_VALBLK | LKM_CANCEL)) { 6036714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "VALBLK given with CANCEL: ignoring VALBLK\n"); 6046714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel flags &= ~LKM_VALBLK; 6056714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 6066714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6076714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (!lksb->lockid || !lksb->lockid->lockres) { 6086714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_error(DLM_BADPARAM); 6096714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return DLM_BADPARAM; 6106714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 6116714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6126714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel lock = lksb->lockid; 6136714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel BUG_ON(!lock); 6146714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lock_get(lock); 6156714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6166714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel res = lock->lockres; 6176714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel BUG_ON(!res); 6186714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lockres_get(res); 6196714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackelretry: 6206714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel call_ast = 0; 6216714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* need to retry up here because owner may have changed */ 6226714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "lock=%p res=%p\n", lock, res); 6236714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6246714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_lock(&res->spinlock); 6256714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel is_master = (res->owner == dlm->node_num); 6266714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel spin_unlock(&res->spinlock); 6276714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6286714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (is_master) { 6296714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = dlmunlock_master(dlm, res, lock, lksb, flags, 6306714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel &call_ast); 6316714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "done calling dlmunlock_master: returned %d, " 6326714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel "call_ast is %d\n", status, call_ast); 6336714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } else { 6346714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status = dlmunlock_remote(dlm, res, lock, lksb, flags, 6356714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel &call_ast); 6366714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "done calling dlmunlock_remote: returned %d, " 6376714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel "call_ast is %d\n", status, call_ast); 6386714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 6396714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6406714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (status == DLM_RECOVERING || 6416714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status == DLM_MIGRATING || 6426714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel status == DLM_FORWARD) { 6436714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* We want to go away for a tiny bit to allow recovery 6446714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * / migration to complete on this resource. I don't 6456714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * know of any wait queue we could sleep on as this 6466714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * may be happening on another node. Perhaps the 6476714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * proper solution is to queue up requests on the 6486714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * other end? */ 6496714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6506714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* do we want to yield(); ?? */ 6516714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel msleep(50); 6526714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6536714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "retrying unlock due to pending recovery/" 6546714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel "migration/in-progress\n"); 6556714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel goto retry; 6566714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 6576714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6586714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (call_ast) { 6596714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "calling unlockast(%p, %d)\n", data, lksb->status); 6606714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (is_master) { 6616714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel /* it is possible that there is one last bast 6626714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * pending. make sure it is flushed, then 6636714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * call the unlockast. 6646714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * not an issue if this is a mastered remotely, 6656714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * since this lock has been removed from the 6666714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel * lockres queues and cannot be found. */ 6676714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_kick_thread(dlm, NULL); 6686714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel wait_event(dlm->ast_wq, 6696714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lock_basts_flushed(dlm, lock)); 6706714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 6716714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel (*unlockast)(data, lksb->status); 6726714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } 6736714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6746714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel if (status == DLM_NORMAL) { 6756714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "kicking the thread\n"); 6766714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_kick_thread(dlm, res); 6776714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel } else 6786714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_error(status); 6796714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6806714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lockres_calc_usage(dlm, res); 6816714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lockres_put(res); 6826714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel dlm_lock_put(lock); 6836714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 6846714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel mlog(0, "returning status=%d!\n", status); 6856714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel return status; 6866714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel} 6876714d8e86bf443f6f7af50f9d432025649f091f5Kurt HackelEXPORT_SYMBOL_GPL(dlmunlock); 6886714d8e86bf443f6f7af50f9d432025649f091f5Kurt Hackel 689