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Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: (56 commits)
  [PATCH] fs/ocfs2/dlm/: cleanups
  ocfs2: fix compiler warnings in dlm_convert_lock_handler()
  ocfs2: dlm_print_one_mle() needs to be defined
  ocfs2: remove whitespace in dlmunlock.c
  ocfs2: move dlm work to a private work queue
  ocfs2: fix incorrect error returns
  ocfs2: tune down some noisy messages during dlm recovery
  ocfs2: display message before waiting for recovery to complete
  ocfs2: mlog in dlm_convert_lock_handler() should be ML_ERROR
  ocfs2: retry operations when a lock is marked in recovery
  ocfs2: use cond_resched() in dlm_thread()
  ocfs2: use GFP_NOFS in some dlm operations
  ocfs2: wait for recovery when starting lock mastery
  ocfs2: continue recovery when a dead node is encountered
  ocfs2: remove unneccesary spin_unlock() in dlm_remaster_locks()
  ocfs2: dlm_remaster_locks() should never exit without completing
  ocfs2: special case recovery lock in dlmlock_remote()
  ocfs2: pending mastery asserts and migrations should block each other
  ocfs2: temporarily disable automatic lock migration
  ocfs2: do not unconditionally purge the lockres in dlmlock_remote()
  ...
This commit is contained in:
Linus Torvalds 2006-06-26 16:06:08 -07:00
parent f6e6e88373 3fb5a9891d
commit eb99adde31
13 changed files with 1046 additions and 374 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
fs/ocfs2/dlm/dlmast.c
View File

@ -197,12 +197,14 @@ static void dlm_update_lvb(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
lock->ml.node == dlm->node_num ? "master" :
"remote");
memcpy(lksb->lvb, res->lvb, DLM_LVB_LEN);
} else if (lksb->flags & DLM_LKSB_PUT_LVB) {
mlog(0, "setting lvb from lockres for %s node\n",
lock->ml.node == dlm->node_num ? "master" :
"remote");
memcpy(res->lvb, lksb->lvb, DLM_LVB_LEN);
}
/* Do nothing for lvb put requests - they should be done in
* place when the lock is downconverted - otherwise we risk
* racing gets and puts which could result in old lvb data
* being propagated. We leave the put flag set and clear it
* here. In the future we might want to clear it at the time
* the put is actually done.
*/
spin_unlock(&res->spinlock);
}

63
fs/ocfs2/dlm/dlmcommon.h
View File

@ -37,7 +37,17 @@
#define DLM_THREAD_SHUFFLE_INTERVAL 5 // flush everything every 5 passes
#define DLM_THREAD_MS 200 // flush at least every 200 ms
#define DLM_HASH_BUCKETS (PAGE_SIZE / sizeof(struct hlist_head))
#define DLM_HASH_SIZE_DEFAULT (1 << 14)
#if DLM_HASH_SIZE_DEFAULT < PAGE_SIZE
# define DLM_HASH_PAGES 1
#else
# define DLM_HASH_PAGES (DLM_HASH_SIZE_DEFAULT / PAGE_SIZE)
#endif
#define DLM_BUCKETS_PER_PAGE (PAGE_SIZE / sizeof(struct hlist_head))
#define DLM_HASH_BUCKETS (DLM_HASH_PAGES * DLM_BUCKETS_PER_PAGE)
/* Intended to make it easier for us to switch out hash functions */
#define dlm_lockid_hash(_n, _l) full_name_hash(_n, _l)
enum dlm_ast_type {
DLM_AST = 0,
@ -61,7 +71,8 @@ static inline int dlm_is_recovery_lock(const char *lock_name, int name_len)
return 0;
}
#define DLM_RECO_STATE_ACTIVE 0x0001
#define DLM_RECO_STATE_ACTIVE 0x0001
#define DLM_RECO_STATE_FINALIZE 0x0002
struct dlm_recovery_ctxt
{
@ -85,7 +96,7 @@ enum dlm_ctxt_state {
struct dlm_ctxt
{
struct list_head list;
struct hlist_head *lockres_hash;
struct hlist_head **lockres_hash;
struct list_head dirty_list;
struct list_head purge_list;
struct list_head pending_asts;
@ -120,6 +131,7 @@ struct dlm_ctxt
struct o2hb_callback_func dlm_hb_down;
struct task_struct *dlm_thread_task;
struct task_struct *dlm_reco_thread_task;
struct workqueue_struct *dlm_worker;
wait_queue_head_t dlm_thread_wq;
wait_queue_head_t dlm_reco_thread_wq;
wait_queue_head_t ast_wq;
@ -132,6 +144,11 @@ struct dlm_ctxt
struct list_head dlm_eviction_callbacks;
};
static inline struct hlist_head *dlm_lockres_hash(struct dlm_ctxt *dlm, unsigned i)
{
return dlm->lockres_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] + (i % DLM_BUCKETS_PER_PAGE);
}
/* these keventd work queue items are for less-frequently
* called functions that cannot be directly called from the
* net message handlers for some reason, usually because
@ -216,20 +233,29 @@ struct dlm_lock_resource
/* WARNING: Please see the comment in dlm_init_lockres before
* adding fields here. */
struct hlist_node hash_node;
struct qstr lockname;
struct kref refs;
/* please keep these next 3 in this order
* some funcs want to iterate over all lists */
/*
* Please keep granted, converting, and blocked in this order,
* as some funcs want to iterate over all lists.
*
* All four lists are protected by the hash's reference.
*/
struct list_head granted;
struct list_head converting;
struct list_head blocked;
struct list_head purge;
/*
* These two lists require you to hold an additional reference
* while they are on the list.
*/
struct list_head dirty;
struct list_head recovering; // dlm_recovery_ctxt.resources list
/* unused lock resources have their last_used stamped and are
* put on a list for the dlm thread to run. */
struct list_head purge;
unsigned long last_used;
unsigned migration_pending:1;
@ -238,7 +264,6 @@ struct dlm_lock_resource
wait_queue_head_t wq;
u8 owner; //node which owns the lock resource, or unknown
u16 state;
struct qstr lockname;
char lvb[DLM_LVB_LEN];
};
@ -300,6 +325,15 @@ enum dlm_lockres_list {
DLM_BLOCKED_LIST
};
static inline int dlm_lvb_is_empty(char *lvb)
{
int i;
for (i=0; i<DLM_LVB_LEN; i++)
if (lvb[i])
return 0;
return 1;
}
static inline struct list_head *
dlm_list_idx_to_ptr(struct dlm_lock_resource *res, enum dlm_lockres_list idx)
{
@ -609,7 +643,8 @@ struct dlm_finalize_reco
{
u8 node_idx;
u8 dead_node;
__be16 pad1;
u8 flags;
u8 pad1;
__be32 pad2;
};
@ -676,6 +711,7 @@ void dlm_wait_for_recovery(struct dlm_ctxt *dlm);
void dlm_kick_recovery_thread(struct dlm_ctxt *dlm);
int dlm_is_node_dead(struct dlm_ctxt *dlm, u8 node);
int dlm_wait_for_node_death(struct dlm_ctxt *dlm, u8 node, int timeout);
int dlm_wait_for_node_recovery(struct dlm_ctxt *dlm, u8 node, int timeout);
void dlm_put(struct dlm_ctxt *dlm);
struct dlm_ctxt *dlm_grab(struct dlm_ctxt *dlm);
@ -687,14 +723,20 @@ void dlm_lockres_calc_usage(struct dlm_ctxt *dlm,
struct dlm_lock_resource *res);
void dlm_purge_lockres(struct dlm_ctxt *dlm,
struct dlm_lock_resource *lockres);
void dlm_lockres_get(struct dlm_lock_resource *res);
static inline void dlm_lockres_get(struct dlm_lock_resource *res)
{
/* This is called on every lookup, so it might be worth
* inlining. */
kref_get(&res->refs);
}
void dlm_lockres_put(struct dlm_lock_resource *res);
void __dlm_unhash_lockres(struct dlm_lock_resource *res);
void __dlm_insert_lockres(struct dlm_ctxt *dlm,
struct dlm_lock_resource *res);
struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm,
const char *name,
unsigned int len);
unsigned int len,
unsigned int hash);
struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm,
const char *name,
unsigned int len);
@ -819,6 +861,7 @@ void dlm_clean_master_list(struct dlm_ctxt *dlm,
u8 dead_node);
int dlm_lock_basts_flushed(struct dlm_ctxt *dlm, struct dlm_lock *lock);
int __dlm_lockres_unused(struct dlm_lock_resource *res);
static inline const char * dlm_lock_mode_name(int mode)
{

24
fs/ocfs2/dlm/dlmconvert.c
View File

@ -214,6 +214,9 @@ grant:
if (lock->ml.node == dlm->node_num)
mlog(0, "doing in-place convert for nonlocal lock\n");
lock->ml.type = type;
if (lock->lksb->flags & DLM_LKSB_PUT_LVB)
memcpy(res->lvb, lock->lksb->lvb, DLM_LVB_LEN);
status = DLM_NORMAL;
*call_ast = 1;
goto unlock_exit;
@ -461,6 +464,12 @@ int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data)
}
spin_lock(&res->spinlock);
status = __dlm_lockres_state_to_status(res);
if (status != DLM_NORMAL) {
spin_unlock(&res->spinlock);
dlm_error(status);
goto leave;
}
list_for_each(iter, &res->granted) {
lock = list_entry(iter, struct dlm_lock, list);
if (lock->ml.cookie == cnv->cookie &&
@ -470,6 +479,21 @@ int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data)
}
lock = NULL;
}
if (!lock) {
__dlm_print_one_lock_resource(res);
list_for_each(iter, &res->granted) {
lock = list_entry(iter, struct dlm_lock, list);
if (lock->ml.node == cnv->node_idx) {
mlog(ML_ERROR, "There is something here "
"for node %u, lock->ml.cookie=%llu, "
"cnv->cookie=%llu\n", cnv->node_idx,
(unsigned long long)lock->ml.cookie,
(unsigned long long)cnv->cookie);
break;
}
}
lock = NULL;
}
spin_unlock(&res->spinlock);
if (!lock) {
status = DLM_IVLOCKID;

6
fs/ocfs2/dlm/dlmdebug.c
View File

@ -37,10 +37,8 @@
#include "dlmapi.h"
#include "dlmcommon.h"
#include "dlmdebug.h"
#include "dlmdomain.h"
#include "dlmdebug.h"
#define MLOG_MASK_PREFIX ML_DLM
#include "cluster/masklog.h"
@ -120,6 +118,7 @@ void dlm_print_one_lock(struct dlm_lock *lockid)
}
EXPORT_SYMBOL_GPL(dlm_print_one_lock);
#if 0
void dlm_dump_lock_resources(struct dlm_ctxt *dlm)
{
struct dlm_lock_resource *res;
@ -136,12 +135,13 @@ void dlm_dump_lock_resources(struct dlm_ctxt *dlm)
spin_lock(&dlm->spinlock);
for (i=0; i<DLM_HASH_BUCKETS; i++) {
bucket = &(dlm->lockres_hash[i]);
bucket = dlm_lockres_hash(dlm, i);
hlist_for_each_entry(res, iter, bucket, hash_node)
dlm_print_one_lock_resource(res);
}
spin_unlock(&dlm->spinlock);
}
#endif /* 0 */
static const char *dlm_errnames[] = {
[DLM_NORMAL] = "DLM_NORMAL",

30
fs/ocfs2/dlm/dlmdebug.h
View File

@ -1,30 +0,0 @@
/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* dlmdebug.h
*
* Copyright (C) 2004 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*
*/
#ifndef DLMDEBUG_H
#define DLMDEBUG_H
void dlm_dump_lock_resources(struct dlm_ctxt *dlm);
#endif

101
fs/ocfs2/dlm/dlmdomain.c
View File

@ -41,7 +41,6 @@
#include "dlmapi.h"
#include "dlmcommon.h"
#include "dlmdebug.h"
#include "dlmdomain.h"
#include "dlmver.h"
@ -49,6 +48,33 @@
#define MLOG_MASK_PREFIX (ML_DLM|ML_DLM_DOMAIN)
#include "cluster/masklog.h"
static void dlm_free_pagevec(void **vec, int pages)
{
while (pages--)
free_page((unsigned long)vec[pages]);
kfree(vec);
}
static void **dlm_alloc_pagevec(int pages)
{
void **vec = kmalloc(pages * sizeof(void *), GFP_KERNEL);
int i;
if (!vec)
return NULL;
for (i = 0; i < pages; i++)
if (!(vec[i] = (void *)__get_free_page(GFP_KERNEL)))
goto out_free;
mlog(0, "Allocated DLM hash pagevec; %d pages (%lu expected), %lu buckets per page\n",
pages, DLM_HASH_PAGES, (unsigned long)DLM_BUCKETS_PER_PAGE);
return vec;
out_free:
dlm_free_pagevec(vec, i);
return NULL;
}
/*
*
* spinlock lock ordering: if multiple locks are needed, obey this ordering:
@ -90,8 +116,7 @@ void __dlm_insert_lockres(struct dlm_ctxt *dlm,
assert_spin_locked(&dlm->spinlock);
q = &res->lockname;
q->hash = full_name_hash(q->name, q->len);
bucket = &(dlm->lockres_hash[q->hash % DLM_HASH_BUCKETS]);
bucket = dlm_lockres_hash(dlm, q->hash);
/* get a reference for our hashtable */
dlm_lockres_get(res);
@ -100,34 +125,32 @@ void __dlm_insert_lockres(struct dlm_ctxt *dlm,
}
struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm,
const char *name,
unsigned int len)
const char *name,
unsigned int len,
unsigned int hash)
{
unsigned int hash;
struct hlist_node *iter;
struct dlm_lock_resource *tmpres=NULL;
struct hlist_head *bucket;
struct hlist_node *list;
mlog_entry("%.*s\n", len, name);
assert_spin_locked(&dlm->spinlock);
hash = full_name_hash(name, len);
bucket = dlm_lockres_hash(dlm, hash);
bucket = &(dlm->lockres_hash[hash % DLM_HASH_BUCKETS]);
/* check for pre-existing lock */
hlist_for_each(iter, bucket) {
tmpres = hlist_entry(iter, struct dlm_lock_resource, hash_node);
if (tmpres->lockname.len == len &&
memcmp(tmpres->lockname.name, name, len) == 0) {
dlm_lockres_get(tmpres);
break;
}
tmpres = NULL;
hlist_for_each(list, bucket) {
struct dlm_lock_resource *res = hlist_entry(list,
struct dlm_lock_resource, hash_node);
if (res->lockname.name[0] != name[0])
continue;
if (unlikely(res->lockname.len != len))
continue;
if (memcmp(res->lockname.name + 1, name + 1, len - 1))
continue;
dlm_lockres_get(res);
return res;
}
return tmpres;
return NULL;
}
struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm,
@ -135,9 +158,10 @@ struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm,
unsigned int len)
{
struct dlm_lock_resource *res;
unsigned int hash = dlm_lockid_hash(name, len);
spin_lock(&dlm->spinlock);
res = __dlm_lookup_lockres(dlm, name, len);
res = __dlm_lookup_lockres(dlm, name, len, hash);
spin_unlock(&dlm->spinlock);
return res;
}
@ -194,7 +218,7 @@ static int dlm_wait_on_domain_helper(const char *domain)
static void dlm_free_ctxt_mem(struct dlm_ctxt *dlm)
{
if (dlm->lockres_hash)
free_page((unsigned long) dlm->lockres_hash);
dlm_free_pagevec((void **)dlm->lockres_hash, DLM_HASH_PAGES);
if (dlm->name)
kfree(dlm->name);
@ -278,11 +302,21 @@ int dlm_domain_fully_joined(struct dlm_ctxt *dlm)
return ret;
}
static void dlm_destroy_dlm_worker(struct dlm_ctxt *dlm)
{
if (dlm->dlm_worker) {
flush_workqueue(dlm->dlm_worker);
destroy_workqueue(dlm->dlm_worker);
dlm->dlm_worker = NULL;
}
}
static void dlm_complete_dlm_shutdown(struct dlm_ctxt *dlm)
{
dlm_unregister_domain_handlers(dlm);
dlm_complete_thread(dlm);
dlm_complete_recovery_thread(dlm);
dlm_destroy_dlm_worker(dlm);
/* We've left the domain. Now we can take ourselves out of the
* list and allow the kref stuff to help us free the
@ -304,8 +338,8 @@ static void dlm_migrate_all_locks(struct dlm_ctxt *dlm)
restart:
spin_lock(&dlm->spinlock);
for (i = 0; i < DLM_HASH_BUCKETS; i++) {
while (!hlist_empty(&dlm->lockres_hash[i])) {
res = hlist_entry(dlm->lockres_hash[i].first,
while (!hlist_empty(dlm_lockres_hash(dlm, i))) {
res = hlist_entry(dlm_lockres_hash(dlm, i)->first,
struct dlm_lock_resource, hash_node);
/* need reference when manually grabbing lockres */
dlm_lockres_get(res);
@ -1126,6 +1160,13 @@ static int dlm_join_domain(struct dlm_ctxt *dlm)
goto bail;
}
dlm->dlm_worker = create_singlethread_workqueue("dlm_wq");
if (!dlm->dlm_worker) {
status = -ENOMEM;
mlog_errno(status);
goto bail;
}
do {
unsigned int backoff;
status = dlm_try_to_join_domain(dlm);
@ -1166,6 +1207,7 @@ bail:
dlm_unregister_domain_handlers(dlm);
dlm_complete_thread(dlm);
dlm_complete_recovery_thread(dlm);
dlm_destroy_dlm_worker(dlm);
}
return status;
@ -1191,7 +1233,7 @@ static struct dlm_ctxt *dlm_alloc_ctxt(const char *domain,
goto leave;
}
dlm->lockres_hash = (struct hlist_head *) __get_free_page(GFP_KERNEL);
dlm->lockres_hash = (struct hlist_head **)dlm_alloc_pagevec(DLM_HASH_PAGES);
if (!dlm->lockres_hash) {
mlog_errno(-ENOMEM);
kfree(dlm->name);
@ -1200,8 +1242,8 @@ static struct dlm_ctxt *dlm_alloc_ctxt(const char *domain,
goto leave;
}
for (i=0; i<DLM_HASH_BUCKETS; i++)
INIT_HLIST_HEAD(&dlm->lockres_hash[i]);
for (i = 0; i < DLM_HASH_BUCKETS; i++)
INIT_HLIST_HEAD(dlm_lockres_hash(dlm, i));
strcpy(dlm->name, domain);
dlm->key = key;
@ -1231,6 +1273,7 @@ static struct dlm_ctxt *dlm_alloc_ctxt(const char *domain,
dlm->dlm_thread_task = NULL;
dlm->dlm_reco_thread_task = NULL;
dlm->dlm_worker = NULL;
init_waitqueue_head(&dlm->dlm_thread_wq);
init_waitqueue_head(&dlm->dlm_reco_thread_wq);
init_waitqueue_head(&dlm->reco.event);

6
fs/ocfs2/dlm/dlmfs.c
View File

@ -116,7 +116,7 @@ static int dlmfs_file_open(struct inode *inode,
* doesn't make sense for LVB writes. */
file->f_flags &= ~O_APPEND;
fp = kmalloc(sizeof(*fp), GFP_KERNEL);
fp = kmalloc(sizeof(*fp), GFP_NOFS);
if (!fp) {
status = -ENOMEM;
goto bail;
@ -196,7 +196,7 @@ static ssize_t dlmfs_file_read(struct file *filp,
else
readlen = count - *ppos;
lvb_buf = kmalloc(readlen, GFP_KERNEL);
lvb_buf = kmalloc(readlen, GFP_NOFS);
if (!lvb_buf)
return -ENOMEM;
@ -240,7 +240,7 @@ static ssize_t dlmfs_file_write(struct file *filp,
else
writelen = count - *ppos;
lvb_buf = kmalloc(writelen, GFP_KERNEL);
lvb_buf = kmalloc(writelen, GFP_NOFS);
if (!lvb_buf)
return -ENOMEM;

68
fs/ocfs2/dlm/dlmlock.c
View File

@ -201,6 +201,7 @@ static enum dlm_status dlmlock_remote(struct dlm_ctxt *dlm,
struct dlm_lock *lock, int flags)
{
enum dlm_status status = DLM_DENIED;
int lockres_changed = 1;
mlog_entry("type=%d\n", lock->ml.type);
mlog(0, "lockres %.*s, flags = 0x%x\n", res->lockname.len,
@ -226,8 +227,25 @@ static enum dlm_status dlmlock_remote(struct dlm_ctxt *dlm,
res->state &= ~DLM_LOCK_RES_IN_PROGRESS;
lock->lock_pending = 0;
if (status != DLM_NORMAL) {
if (status != DLM_NOTQUEUED)
if (status == DLM_RECOVERING &&
dlm_is_recovery_lock(res->lockname.name,
res->lockname.len)) {
/* recovery lock was mastered by dead node.
* we need to have calc_usage shoot down this
* lockres and completely remaster it. */
mlog(0, "%s: recovery lock was owned by "
"dead node %u, remaster it now.\n",
dlm->name, res->owner);
} else if (status != DLM_NOTQUEUED) {
/*
* DO NOT call calc_usage, as this would unhash
* the remote lockres before we ever get to use
* it. treat as if we never made any change to
* the lockres.
*/
lockres_changed = 0;
dlm_error(status);
}
dlm_revert_pending_lock(res, lock);
dlm_lock_put(lock);
} else if (dlm_is_recovery_lock(res->lockname.name,
@ -243,7 +261,8 @@ static enum dlm_status dlmlock_remote(struct dlm_ctxt *dlm,
}
spin_unlock(&res->spinlock);
dlm_lockres_calc_usage(dlm, res);
if (lockres_changed)
dlm_lockres_calc_usage(dlm, res);
wake_up(&res->wq);
return status;
@ -280,6 +299,14 @@ static enum dlm_status dlm_send_remote_lock_request(struct dlm_ctxt *dlm,
if (tmpret >= 0) {
// successfully sent and received
ret = status; // this is already a dlm_status
if (ret == DLM_REJECTED) {
mlog(ML_ERROR, "%s:%.*s: BUG. this is a stale lockres "
"no longer owned by %u. that node is coming back "
"up currently.\n", dlm->name, create.namelen,
create.name, res->owner);
dlm_print_one_lock_resource(res);
BUG();
}
} else {
mlog_errno(tmpret);
if (dlm_is_host_down(tmpret)) {
@ -381,13 +408,13 @@ struct dlm_lock * dlm_new_lock(int type, u8 node, u64 cookie,
struct dlm_lock *lock;
int kernel_allocated = 0;
lock = kcalloc(1, sizeof(*lock), GFP_KERNEL);
lock = kcalloc(1, sizeof(*lock), GFP_NOFS);
if (!lock)
return NULL;
if (!lksb) {
/* zero memory only if kernel-allocated */
lksb = kcalloc(1, sizeof(*lksb), GFP_KERNEL);
lksb = kcalloc(1, sizeof(*lksb), GFP_NOFS);
if (!lksb) {
kfree(lock);
return NULL;
@ -428,11 +455,16 @@ int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data)
if (!dlm_grab(dlm))
return DLM_REJECTED;
mlog_bug_on_msg(!dlm_domain_fully_joined(dlm),
"Domain %s not fully joined!\n", dlm->name);
name = create->name;
namelen = create->namelen;
status = DLM_REJECTED;
if (!dlm_domain_fully_joined(dlm)) {
mlog(ML_ERROR, "Domain %s not fully joined, but node %u is "
"sending a create_lock message for lock %.*s!\n",
dlm->name, create->node_idx, namelen, name);
dlm_error(status);
goto leave;
}
status = DLM_IVBUFLEN;
if (namelen > DLM_LOCKID_NAME_MAX) {
@ -668,18 +700,22 @@ retry_lock:
msleep(100);
/* no waiting for dlm_reco_thread */
if (recovery) {
if (status == DLM_RECOVERING) {
mlog(0, "%s: got RECOVERING "
"for $REOCVERY lock, master "
"was %u\n", dlm->name,
res->owner);
dlm_wait_for_node_death(dlm, res->owner,
DLM_NODE_DEATH_WAIT_MAX);
}
if (status != DLM_RECOVERING)
goto retry_lock;
mlog(0, "%s: got RECOVERING "
"for $RECOVERY lock, master "
"was %u\n", dlm->name,
res->owner);
/* wait to see the node go down, then
* drop down and allow the lockres to
* get cleaned up. need to remaster. */
dlm_wait_for_node_death(dlm, res->owner,
DLM_NODE_DEATH_WAIT_MAX);
} else {
dlm_wait_for_recovery(dlm);
goto retry_lock;
}
goto retry_lock;
}
if (status != DLM_NORMAL) {

450
fs/ocfs2/dlm/dlmmaster.c
View File

@ -47,7 +47,6 @@
#include "dlmapi.h"
#include "dlmcommon.h"
#include "dlmdebug.h"
#include "dlmdomain.h"
#define MLOG_MASK_PREFIX (ML_DLM|ML_DLM_MASTER)
@ -74,6 +73,7 @@ struct dlm_master_list_entry
wait_queue_head_t wq;
atomic_t woken;
struct kref mle_refs;
int inuse;
unsigned long maybe_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
unsigned long vote_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
unsigned long response_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
@ -127,18 +127,30 @@ static inline int dlm_mle_equal(struct dlm_ctxt *dlm,
return 1;
}
#if 0
/* Code here is included but defined out as it aids debugging */
void dlm_print_one_mle(struct dlm_master_list_entry *mle)
#define dlm_print_nodemap(m) _dlm_print_nodemap(m,#m)
static void _dlm_print_nodemap(unsigned long *map, const char *mapname)
{
int i = 0, refs;
int i;
printk("%s=[ ", mapname);
for (i=0; i<O2NM_MAX_NODES; i++)
if (test_bit(i, map))
printk("%d ", i);
printk("]");
}
static void dlm_print_one_mle(struct dlm_master_list_entry *mle)
{
int refs;
char *type;
char attached;
u8 master;
unsigned int namelen;
const char *name;
struct kref *k;
unsigned long *maybe = mle->maybe_map,
*vote = mle->vote_map,
*resp = mle->response_map,
*node = mle->node_map;
k = &mle->mle_refs;
if (mle->type == DLM_MLE_BLOCK)
@ -159,18 +171,29 @@ void dlm_print_one_mle(struct dlm_master_list_entry *mle)
name = mle->u.res->lockname.name;
}
mlog(ML_NOTICE, " #%3d: %3s %3d %3u %3u %c (%d)%.*s\n",
i, type, refs, master, mle->new_master, attached,
namelen, namelen, name);
mlog(ML_NOTICE, "%.*s: %3s refs=%3d mas=%3u new=%3u evt=%c inuse=%d ",
namelen, name, type, refs, master, mle->new_master, attached,
mle->inuse);
dlm_print_nodemap(maybe);
printk(", ");
dlm_print_nodemap(vote);
printk(", ");
dlm_print_nodemap(resp);
printk(", ");
dlm_print_nodemap(node);
printk(", ");
printk("\n");
}
#if 0
/* Code here is included but defined out as it aids debugging */
static void dlm_dump_mles(struct dlm_ctxt *dlm)
{
struct dlm_master_list_entry *mle;
struct list_head *iter;
mlog(ML_NOTICE, "dumping all mles for domain %s:\n", dlm->name);
mlog(ML_NOTICE, " ####: type refs owner new events? lockname nodemap votemap respmap maybemap\n");
spin_lock(&dlm->master_lock);
list_for_each(iter, &dlm->master_list) {
mle = list_entry(iter, struct dlm_master_list_entry, list);
@ -314,6 +337,31 @@ static inline void dlm_mle_detach_hb_events(struct dlm_ctxt *dlm,
spin_unlock(&dlm->spinlock);
}
static void dlm_get_mle_inuse(struct dlm_master_list_entry *mle)
{
struct dlm_ctxt *dlm;
dlm = mle->dlm;
assert_spin_locked(&dlm->spinlock);
assert_spin_locked(&dlm->master_lock);
mle->inuse++;
kref_get(&mle->mle_refs);
}
static void dlm_put_mle_inuse(struct dlm_master_list_entry *mle)
{
struct dlm_ctxt *dlm;
dlm = mle->dlm;
spin_lock(&dlm->spinlock);
spin_lock(&dlm->master_lock);
mle->inuse--;
__dlm_put_mle(mle);
spin_unlock(&dlm->master_lock);
spin_unlock(&dlm->spinlock);
}
/* remove from list and free */
static void __dlm_put_mle(struct dlm_master_list_entry *mle)
{
@ -322,9 +370,14 @@ static void __dlm_put_mle(struct dlm_master_list_entry *mle)
assert_spin_locked(&dlm->spinlock);
assert_spin_locked(&dlm->master_lock);
BUG_ON(!atomic_read(&mle->mle_refs.refcount));
kref_put(&mle->mle_refs, dlm_mle_release);
if (!atomic_read(&mle->mle_refs.refcount)) {
/* this may or may not crash, but who cares.
* it's a BUG. */
mlog(ML_ERROR, "bad mle: %p\n", mle);
dlm_print_one_mle(mle);
BUG();
} else
kref_put(&mle->mle_refs, dlm_mle_release);
}
@ -367,6 +420,7 @@ static void dlm_init_mle(struct dlm_master_list_entry *mle,
memset(mle->response_map, 0, sizeof(mle->response_map));
mle->master = O2NM_MAX_NODES;
mle->new_master = O2NM_MAX_NODES;
mle->inuse = 0;
if (mle->type == DLM_MLE_MASTER) {
BUG_ON(!res);
@ -564,6 +618,28 @@ static void dlm_lockres_release(struct kref *kref)
mlog(0, "destroying lockres %.*s\n", res->lockname.len,
res->lockname.name);
if (!hlist_unhashed(&res->hash_node) ||
!list_empty(&res->granted) ||
!list_empty(&res->converting) ||
!list_empty(&res->blocked) ||
!list_empty(&res->dirty) ||
!list_empty(&res->recovering) ||
!list_empty(&res->purge)) {
mlog(ML_ERROR,
"Going to BUG for resource %.*s."
" We're on a list! [%c%c%c%c%c%c%c]\n",
res->lockname.len, res->lockname.name,
!hlist_unhashed(&res->hash_node) ? 'H' : ' ',
!list_empty(&res->granted) ? 'G' : ' ',
!list_empty(&res->converting) ? 'C' : ' ',
!list_empty(&res->blocked) ? 'B' : ' ',
!list_empty(&res->dirty) ? 'D' : ' ',
!list_empty(&res->recovering) ? 'R' : ' ',
!list_empty(&res->purge) ? 'P' : ' ');
dlm_print_one_lock_resource(res);
}
/* By the time we're ready to blow this guy away, we shouldn't
* be on any lists. */
BUG_ON(!hlist_unhashed(&res->hash_node));
@ -579,11 +655,6 @@ static void dlm_lockres_release(struct kref *kref)
kfree(res);
}
void dlm_lockres_get(struct dlm_lock_resource *res)
{
kref_get(&res->refs);
}
void dlm_lockres_put(struct dlm_lock_resource *res)
{
kref_put(&res->refs, dlm_lockres_release);
@ -603,7 +674,7 @@ static void dlm_init_lockres(struct dlm_ctxt *dlm,
memcpy(qname, name, namelen);
res->lockname.len = namelen;
res->lockname.hash = full_name_hash(name, namelen);
res->lockname.hash = dlm_lockid_hash(name, namelen);
init_waitqueue_head(&res->wq);
spin_lock_init(&res->spinlock);
@ -637,11 +708,11 @@ struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm,
{
struct dlm_lock_resource *res;
res = kmalloc(sizeof(struct dlm_lock_resource), GFP_KERNEL);
res = kmalloc(sizeof(struct dlm_lock_resource), GFP_NOFS);
if (!res)
return NULL;
res->lockname.name = kmalloc(namelen, GFP_KERNEL);
res->lockname.name = kmalloc(namelen, GFP_NOFS);
if (!res->lockname.name) {
kfree(res);
return NULL;
@ -677,19 +748,20 @@ struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm,
int blocked = 0;
int ret, nodenum;
struct dlm_node_iter iter;
unsigned int namelen;
unsigned int namelen, hash;
int tries = 0;
int bit, wait_on_recovery = 0;
BUG_ON(!lockid);
namelen = strlen(lockid);
hash = dlm_lockid_hash(lockid, namelen);
mlog(0, "get lockres %s (len %d)\n", lockid, namelen);
lookup:
spin_lock(&dlm->spinlock);
tmpres = __dlm_lookup_lockres(dlm, lockid, namelen);
tmpres = __dlm_lookup_lockres(dlm, lockid, namelen, hash);
if (tmpres) {
spin_unlock(&dlm->spinlock);
mlog(0, "found in hash!\n");
@ -704,7 +776,7 @@ lookup:
mlog(0, "allocating a new resource\n");
/* nothing found and we need to allocate one. */
alloc_mle = (struct dlm_master_list_entry *)
kmem_cache_alloc(dlm_mle_cache, GFP_KERNEL);
kmem_cache_alloc(dlm_mle_cache, GFP_NOFS);
if (!alloc_mle)
goto leave;
res = dlm_new_lockres(dlm, lockid, namelen);
@ -790,10 +862,11 @@ lookup:
* if so, the creator of the BLOCK may try to put the last
* ref at this time in the assert master handler, so we
* need an extra one to keep from a bad ptr deref. */
dlm_get_mle(mle);
dlm_get_mle_inuse(mle);
spin_unlock(&dlm->master_lock);
spin_unlock(&dlm->spinlock);
redo_request:
while (wait_on_recovery) {
/* any cluster changes that occurred after dropping the
* dlm spinlock would be detectable be a change on the mle,
@ -812,7 +885,7 @@ lookup:
}
dlm_kick_recovery_thread(dlm);
msleep(100);
msleep(1000);
dlm_wait_for_recovery(dlm);
spin_lock(&dlm->spinlock);
@ -825,13 +898,15 @@ lookup:
} else
wait_on_recovery = 0;
spin_unlock(&dlm->spinlock);
if (wait_on_recovery)
dlm_wait_for_node_recovery(dlm, bit, 10000);
}
/* must wait for lock to be mastered elsewhere */
if (blocked)
goto wait;
redo_request:
ret = -EINVAL;
dlm_node_iter_init(mle->vote_map, &iter);
while ((nodenum = dlm_node_iter_next(&iter)) >= 0) {
@ -856,6 +931,7 @@ wait:
/* keep going until the response map includes all nodes */
ret = dlm_wait_for_lock_mastery(dlm, res, mle, &blocked);
if (ret < 0) {
wait_on_recovery = 1;
mlog(0, "%s:%.*s: node map changed, redo the "
"master request now, blocked=%d\n",
dlm->name, res->lockname.len,
@ -866,7 +942,7 @@ wait:
dlm->name, res->lockname.len,
res->lockname.name, blocked);
dlm_print_one_lock_resource(res);
/* dlm_print_one_mle(mle); */
dlm_print_one_mle(mle);
tries = 0;
}
goto redo_request;
@ -880,7 +956,7 @@ wait:
dlm_mle_detach_hb_events(dlm, mle);
dlm_put_mle(mle);
/* put the extra ref */
dlm_put_mle(mle);
dlm_put_mle_inuse(mle);
wake_waiters:
spin_lock(&res->spinlock);
@ -921,12 +997,14 @@ recheck:
spin_unlock(&res->spinlock);
/* this will cause the master to re-assert across
* the whole cluster, freeing up mles */
ret = dlm_do_master_request(mle, res->owner);
if (ret < 0) {
/* give recovery a chance to run */
mlog(ML_ERROR, "link to %u went down?: %d\n", res->owner, ret);
msleep(500);
goto recheck;
if (res->owner != dlm->node_num) {
ret = dlm_do_master_request(mle, res->owner);
if (ret < 0) {
/* give recovery a chance to run */
mlog(ML_ERROR, "link to %u went down?: %d\n", res->owner, ret);
msleep(500);
goto recheck;
}
}
ret = 0;
goto leave;
@ -962,6 +1040,12 @@ recheck:
"rechecking now\n", dlm->name, res->lockname.len,
res->lockname.name);
goto recheck;
} else {
if (!voting_done) {
mlog(0, "map not changed and voting not done "
"for %s:%.*s\n", dlm->name, res->lockname.len,
res->lockname.name);
}
}
if (m != O2NM_MAX_NODES) {
@ -1129,18 +1213,6 @@ static int dlm_restart_lock_mastery(struct dlm_ctxt *dlm,
set_bit(node, mle->vote_map);
} else {
mlog(ML_ERROR, "node down! %d\n", node);
/* if the node wasn't involved in mastery skip it,
* but clear it out from the maps so that it will
* not affect mastery of this lockres */
clear_bit(node, mle->response_map);
clear_bit(node, mle->vote_map);
if (!test_bit(node, mle->maybe_map))
goto next;
/* if we're already blocked on lock mastery, and the
* dead node wasn't the expected master, or there is
* another node in the maybe_map, keep waiting */
if (blocked) {
int lowest = find_next_bit(mle->maybe_map,
O2NM_MAX_NODES, 0);
@ -1148,54 +1220,53 @@ static int dlm_restart_lock_mastery(struct dlm_ctxt *dlm,
/* act like it was never there */
clear_bit(node, mle->maybe_map);
if (node != lowest)
goto next;
mlog(ML_ERROR, "expected master %u died while "
"this node was blocked waiting on it!\n",
node);
lowest = find_next_bit(mle->maybe_map,
O2NM_MAX_NODES,
lowest+1);
if (lowest < O2NM_MAX_NODES) {
mlog(0, "still blocked. waiting "
"on %u now\n", lowest);
goto next;
if (node == lowest) {
mlog(0, "expected master %u died"
" while this node was blocked "
"waiting on it!\n", node);
lowest = find_next_bit(mle->maybe_map,
O2NM_MAX_NODES,
lowest+1);
if (lowest < O2NM_MAX_NODES) {
mlog(0, "%s:%.*s:still "
"blocked. waiting on %u "
"now\n", dlm->name,
res->lockname.len,
res->lockname.name,
lowest);
} else {
/* mle is an MLE_BLOCK, but
* there is now nothing left to
* block on. we need to return
* all the way back out and try
* again with an MLE_MASTER.
* dlm_do_local_recovery_cleanup
* has already run, so the mle
* refcount is ok */
mlog(0, "%s:%.*s: no "
"longer blocking. try to "
"master this here\n",
dlm->name,
res->lockname.len,
res->lockname.name);
mle->type = DLM_MLE_MASTER;
mle->u.res = res;
}
}
/* mle is an MLE_BLOCK, but there is now
* nothing left to block on. we need to return
* all the way back out and try again with
* an MLE_MASTER. dlm_do_local_recovery_cleanup
* has already run, so the mle refcount is ok */
mlog(0, "no longer blocking. we can "
"try to master this here\n");
mle->type = DLM_MLE_MASTER;
memset(mle->maybe_map, 0,
sizeof(mle->maybe_map));
memset(mle->response_map, 0,
sizeof(mle->maybe_map));
memcpy(mle->vote_map, mle->node_map,
sizeof(mle->node_map));
mle->u.res = res;
set_bit(dlm->node_num, mle->maybe_map);
ret = -EAGAIN;
goto next;
}
clear_bit(node, mle->maybe_map);
if (node > dlm->node_num)
goto next;
mlog(0, "dead node in map!\n");
/* yuck. go back and re-contact all nodes
* in the vote_map, removing this node. */
memset(mle->response_map, 0,
sizeof(mle->response_map));
/* now blank out everything, as if we had never
* contacted anyone */
memset(mle->maybe_map, 0, sizeof(mle->maybe_map));
memset(mle->response_map, 0, sizeof(mle->response_map));
/* reset the vote_map to the current node_map */
memcpy(mle->vote_map, mle->node_map,
sizeof(mle->node_map));
/* put myself into the maybe map */
if (mle->type != DLM_MLE_BLOCK)
set_bit(dlm->node_num, mle->maybe_map);
}
ret = -EAGAIN;
next:
node = dlm_bitmap_diff_iter_next(&bdi, &sc);
}
return ret;
@ -1316,7 +1387,7 @@ int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data)
struct dlm_master_request *request = (struct dlm_master_request *) msg->buf;
struct dlm_master_list_entry *mle = NULL, *tmpmle = NULL;
char *name;
unsigned int namelen;
unsigned int namelen, hash;
int found, ret;
int set_maybe;
int dispatch_assert = 0;
@ -1331,6 +1402,7 @@ int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data)
name = request->name;
namelen = request->namelen;
hash = dlm_lockid_hash(name, namelen);
if (namelen > DLM_LOCKID_NAME_MAX) {
response = DLM_IVBUFLEN;
@ -1339,7 +1411,7 @@ int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data)
way_up_top:
spin_lock(&dlm->spinlock);
res = __dlm_lookup_lockres(dlm, name, namelen);
res = __dlm_lookup_lockres(dlm, name, namelen, hash);
if (res) {
spin_unlock(&dlm->spinlock);
@ -1459,21 +1531,18 @@ way_up_top:
spin_unlock(&dlm->spinlock);
mle = (struct dlm_master_list_entry *)
kmem_cache_alloc(dlm_mle_cache, GFP_KERNEL);
kmem_cache_alloc(dlm_mle_cache, GFP_NOFS);
if (!mle) {
response = DLM_MASTER_RESP_ERROR;
mlog_errno(-ENOMEM);
goto send_response;
}
spin_lock(&dlm->spinlock);
dlm_init_mle(mle, DLM_MLE_BLOCK, dlm, NULL,
name, namelen);
spin_unlock(&dlm->spinlock);
goto way_up_top;
}
// mlog(0, "this is second time thru, already allocated, "
// "add the block.\n");
dlm_init_mle(mle, DLM_MLE_BLOCK, dlm, NULL, name, namelen);
set_bit(request->node_idx, mle->maybe_map);
list_add(&mle->list, &dlm->master_list);
response = DLM_MASTER_RESP_NO;
@ -1556,6 +1625,8 @@ again:
dlm_node_iter_init(nodemap, &iter);
while ((to = dlm_node_iter_next(&iter)) >= 0) {
int r = 0;
struct dlm_master_list_entry *mle = NULL;
mlog(0, "sending assert master to %d (%.*s)\n", to,
namelen, lockname);
memset(&assert, 0, sizeof(assert));
@ -1567,20 +1638,28 @@ again:
tmpret = o2net_send_message(DLM_ASSERT_MASTER_MSG, dlm->key,
&assert, sizeof(assert), to, &r);
if (tmpret < 0) {
mlog(ML_ERROR, "assert_master returned %d!\n", tmpret);
mlog(0, "assert_master returned %d!\n", tmpret);
if (!dlm_is_host_down(tmpret)) {
mlog(ML_ERROR, "unhandled error!\n");
mlog(ML_ERROR, "unhandled error=%d!\n", tmpret);
BUG();
}
/* a node died. finish out the rest of the nodes. */
mlog(ML_ERROR, "link to %d went down!\n", to);
mlog(0, "link to %d went down!\n", to);
/* any nonzero status return will do */
ret = tmpret;
} else if (r < 0) {
/* ok, something horribly messed. kill thyself. */
mlog(ML_ERROR,"during assert master of %.*s to %u, "
"got %d.\n", namelen, lockname, to, r);
dlm_dump_lock_resources(dlm);
spin_lock(&dlm->spinlock);
spin_lock(&dlm->master_lock);
if (dlm_find_mle(dlm, &mle, (char *)lockname,
namelen)) {
dlm_print_one_mle(mle);
__dlm_put_mle(mle);
}
spin_unlock(&dlm->master_lock);
spin_unlock(&dlm->spinlock);
BUG();
} else if (r == EAGAIN) {
mlog(0, "%.*s: node %u create mles on other "
@ -1612,7 +1691,7 @@ int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data)
struct dlm_assert_master *assert = (struct dlm_assert_master *)msg->buf;
struct dlm_lock_resource *res = NULL;
char *name;
unsigned int namelen;
unsigned int namelen, hash;
u32 flags;
int master_request = 0;
int ret = 0;
@ -1622,6 +1701,7 @@ int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data)
name = assert->name;
namelen = assert->namelen;
hash = dlm_lockid_hash(name, namelen);
flags = be32_to_cpu(assert->flags);
if (namelen > DLM_LOCKID_NAME_MAX) {
@ -1646,7 +1726,7 @@ int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data)
if (bit >= O2NM_MAX_NODES) {
/* not necessarily an error, though less likely.
* could be master just re-asserting. */
mlog(ML_ERROR, "no bits set in the maybe_map, but %u "
mlog(0, "no bits set in the maybe_map, but %u "
"is asserting! (%.*s)\n", assert->node_idx,
namelen, name);
} else if (bit != assert->node_idx) {
@ -1658,19 +1738,36 @@ int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data)
* number winning the mastery will respond
* YES to mastery requests, but this node
* had no way of knowing. let it pass. */
mlog(ML_ERROR, "%u is the lowest node, "
mlog(0, "%u is the lowest node, "
"%u is asserting. (%.*s) %u must "
"have begun after %u won.\n", bit,
assert->node_idx, namelen, name, bit,
assert->node_idx);
}
}
if (mle->type == DLM_MLE_MIGRATION) {
if (flags & DLM_ASSERT_MASTER_MLE_CLEANUP) {
mlog(0, "%s:%.*s: got cleanup assert"
" from %u for migration\n",
dlm->name, namelen, name,
assert->node_idx);
} else if (!(flags & DLM_ASSERT_MASTER_FINISH_MIGRATION)) {
mlog(0, "%s:%.*s: got unrelated assert"
" from %u for migration, ignoring\n",
dlm->name, namelen, name,
assert->node_idx);
__dlm_put_mle(mle);
spin_unlock(&dlm->master_lock);
spin_unlock(&dlm->spinlock);
goto done;
}
}
}
spin_unlock(&dlm->master_lock);
/* ok everything checks out with the MLE
* now check to see if there is a lockres */
res = __dlm_lookup_lockres(dlm, name, namelen);
res = __dlm_lookup_lockres(dlm, name, namelen, hash);
if (res) {
spin_lock(&res->spinlock);
if (res->state & DLM_LOCK_RES_RECOVERING) {
@ -1679,7 +1776,8 @@ int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data)
goto kill;
}
if (!mle) {
if (res->owner != assert->node_idx) {
if (res->owner != DLM_LOCK_RES_OWNER_UNKNOWN &&
res->owner != assert->node_idx) {
mlog(ML_ERROR, "assert_master from "
"%u, but current owner is "
"%u! (%.*s)\n",
@ -1732,6 +1830,7 @@ ok:
if (mle) {
int extra_ref = 0;
int nn = -1;
int rr, err = 0;
spin_lock(&mle->spinlock);
if (mle->type == DLM_MLE_BLOCK || mle->type == DLM_MLE_MIGRATION)
@ -1751,27 +1850,64 @@ ok:
wake_up(&mle->wq);
spin_unlock(&mle->spinlock);
if (mle->type == DLM_MLE_MIGRATION && res) {
mlog(0, "finishing off migration of lockres %.*s, "
"from %u to %u\n",
res->lockname.len, res->lockname.name,
dlm->node_num, mle->new_master);
if (res) {
spin_lock(&res->spinlock);
res->state &= ~DLM_LOCK_RES_MIGRATING;
dlm_change_lockres_owner(dlm, res, mle->new_master);
BUG_ON(res->state & DLM_LOCK_RES_DIRTY);
if (mle->type == DLM_MLE_MIGRATION) {
mlog(0, "finishing off migration of lockres %.*s, "
"from %u to %u\n",
res->lockname.len, res->lockname.name,
dlm->node_num, mle->new_master);
res->state &= ~DLM_LOCK_RES_MIGRATING;
dlm_change_lockres_owner(dlm, res, mle->new_master);
BUG_ON(res->state & DLM_LOCK_RES_DIRTY);
} else {
dlm_change_lockres_owner(dlm, res, mle->master);
}
spin_unlock(&res->spinlock);
}
/* master is known, detach if not already detached */
dlm_mle_detach_hb_events(dlm, mle);
dlm_put_mle(mle);
/* master is known, detach if not already detached.
* ensures that only one assert_master call will happen
* on this mle. */
spin_lock(&dlm->spinlock);
spin_lock(&dlm->master_lock);
rr = atomic_read(&mle->mle_refs.refcount);
if (mle->inuse > 0) {
if (extra_ref && rr < 3)
err = 1;
else if (!extra_ref && rr < 2)
err = 1;
} else {
if (extra_ref && rr < 2)
err = 1;
else if (!extra_ref && rr < 1)
err = 1;
}
if (err) {
mlog(ML_ERROR, "%s:%.*s: got assert master from %u "
"that will mess up this node, refs=%d, extra=%d, "
"inuse=%d\n", dlm->name, namelen, name,
assert->node_idx, rr, extra_ref, mle->inuse);
dlm_print_one_mle(mle);
}
list_del_init(&mle->list);
__dlm_mle_detach_hb_events(dlm, mle);
__dlm_put_mle(mle);
if (extra_ref) {
/* the assert master message now balances the extra
* ref given by the master / migration request message.
* if this is the last put, it will be removed
* from the list. */
dlm_put_mle(mle);
__dlm_put_mle(mle);
}
spin_unlock(&dlm->master_lock);
spin_unlock(&dlm->spinlock);
} else if (res) {
if (res->owner != assert->node_idx) {
mlog(0, "assert_master from %u, but current "
"owner is %u (%.*s), no mle\n", assert->node_idx,
res->owner, namelen, name);
}
}
@ -1788,12 +1924,12 @@ done:
kill:
/* kill the caller! */
mlog(ML_ERROR, "Bad message received from another node. Dumping state "
"and killing the other node now! This node is OK and can continue.\n");
__dlm_print_one_lock_resource(res);
spin_unlock(&res->spinlock);
spin_unlock(&dlm->spinlock);
dlm_lockres_put(res);
mlog(ML_ERROR, "Bad message received from another node. Dumping state "
"and killing the other node now! This node is OK and can continue.\n");
dlm_dump_lock_resources(dlm);
dlm_put(dlm);
return -EINVAL;
}
@ -1803,7 +1939,7 @@ int dlm_dispatch_assert_master(struct dlm_ctxt *dlm,
int ignore_higher, u8 request_from, u32 flags)
{
struct dlm_work_item *item;
item = kcalloc(1, sizeof(*item), GFP_KERNEL);
item = kcalloc(1, sizeof(*item), GFP_NOFS);
if (!item)
return -ENOMEM;
@ -1825,7 +1961,7 @@ int dlm_dispatch_assert_master(struct dlm_ctxt *dlm,
list_add_tail(&item->list, &dlm->work_list);
spin_unlock(&dlm->work_lock);
schedule_work(&dlm->dispatched_work);
queue_work(dlm->dlm_worker, &dlm->dispatched_work);
return 0;
}
@ -1866,6 +2002,23 @@ static void dlm_assert_master_worker(struct dlm_work_item *item, void *data)
}
}
/*
* If we're migrating this lock to someone else, we are no
* longer allowed to assert out own mastery. OTOH, we need to
* prevent migration from starting while we're still asserting
* our dominance. The reserved ast delays migration.
*/
spin_lock(&res->spinlock);
if (res->state & DLM_LOCK_RES_MIGRATING) {
mlog(0, "Someone asked us to assert mastery, but we're "
"in the middle of migration. Skipping assert, "
"the new master will handle that.\n");
spin_unlock(&res->spinlock);
goto put;
} else
__dlm_lockres_reserve_ast(res);
spin_unlock(&res->spinlock);
/* this call now finishes out the nodemap
* even if one or more nodes die */
mlog(0, "worker about to master %.*s here, this=%u\n",
@ -1875,9 +2028,14 @@ static void dlm_assert_master_worker(struct dlm_work_item *item, void *data)
nodemap, flags);
if (ret < 0) {
/* no need to restart, we are done */
mlog_errno(ret);
if (!dlm_is_host_down(ret))
mlog_errno(ret);
}
/* Ok, we've asserted ourselves. Let's let migration start. */
dlm_lockres_release_ast(dlm, res);
put:
dlm_lockres_put(res);
mlog(0, "finished with dlm_assert_master_worker\n");
@ -1916,6 +2074,7 @@ static int dlm_pre_master_reco_lockres(struct dlm_ctxt *dlm,
BUG();
/* host is down, so answer for that node would be
* DLM_LOCK_RES_OWNER_UNKNOWN. continue. */
ret = 0;
}
if (master != DLM_LOCK_RES_OWNER_UNKNOWN) {
@ -2016,14 +2175,14 @@ int dlm_migrate_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
*/
ret = -ENOMEM;
mres = (struct dlm_migratable_lockres *) __get_free_page(GFP_KERNEL);
mres = (struct dlm_migratable_lockres *) __get_free_page(GFP_NOFS);
if (!mres) {
mlog_errno(ret);
goto leave;
}
mle = (struct dlm_master_list_entry *) kmem_cache_alloc(dlm_mle_cache,
GFP_KERNEL);
GFP_NOFS);
if (!mle) {
mlog_errno(ret);
goto leave;
@ -2117,7 +2276,7 @@ fail:
* take both dlm->spinlock and dlm->master_lock */
spin_lock(&dlm->spinlock);
spin_lock(&dlm->master_lock);
dlm_get_mle(mle);
dlm_get_mle_inuse(mle);
spin_unlock(&dlm->master_lock);
spin_unlock(&dlm->spinlock);
@ -2134,7 +2293,10 @@ fail:
/* migration failed, detach and clean up mle */
dlm_mle_detach_hb_events(dlm, mle);
dlm_put_mle(mle);
dlm_put_mle(mle);
dlm_put_mle_inuse(mle);
spin_lock(&res->spinlock);
res->state &= ~DLM_LOCK_RES_MIGRATING;
spin_unlock(&res->spinlock);
goto leave;
}
@ -2164,8 +2326,8 @@ fail:
/* avoid hang during shutdown when migrating lockres
* to a node which also goes down */
if (dlm_is_node_dead(dlm, target)) {
mlog(0, "%s:%.*s: expected migration target %u "
"is no longer up. restarting.\n",
mlog(0, "%s:%.*s: expected migration "
"target %u is no longer up, restarting\n",
dlm->name, res->lockname.len,
res->lockname.name, target);
ret = -ERESTARTSYS;
@ -2175,7 +2337,10 @@ fail:
/* migration failed, detach and clean up mle */
dlm_mle_detach_hb_events(dlm, mle);
dlm_put_mle(mle);
dlm_put_mle(mle);
dlm_put_mle_inuse(mle);
spin_lock(&res->spinlock);
res->state &= ~DLM_LOCK_RES_MIGRATING;
spin_unlock(&res->spinlock);
goto leave;
}
/* TODO: if node died: stop, clean up, return error */
@ -2191,7 +2356,7 @@ fail:
/* master is known, detach if not already detached */
dlm_mle_detach_hb_events(dlm, mle);
dlm_put_mle(mle);
dlm_put_mle_inuse(mle);
ret = 0;
dlm_lockres_calc_usage(dlm, res);
@ -2462,7 +2627,7 @@ int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data)
struct dlm_migrate_request *migrate = (struct dlm_migrate_request *) msg->buf;
struct dlm_master_list_entry *mle = NULL, *oldmle = NULL;
const char *name;
unsigned int namelen;
unsigned int namelen, hash;
int ret = 0;
if (!dlm_grab(dlm))
@ -2470,10 +2635,11 @@ int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data)
name = migrate->name;
namelen = migrate->namelen;
hash = dlm_lockid_hash(name, namelen);
/* preallocate.. if this fails, abort */
mle = (struct dlm_master_list_entry *) kmem_cache_alloc(dlm_mle_cache,
GFP_KERNEL);
GFP_NOFS);
if (!mle) {
ret = -ENOMEM;
@ -2482,7 +2648,7 @@ int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data)
/* check for pre-existing lock */
spin_lock(&dlm->spinlock);
res = __dlm_lookup_lockres(dlm, name, namelen);
res = __dlm_lookup_lockres(dlm, name, namelen, hash);
spin_lock(&dlm->master_lock);
if (res) {
@ -2580,6 +2746,7 @@ static int dlm_add_migration_mle(struct dlm_ctxt *dlm,
/* remove it from the list so that only one
* mle will be found */
list_del_init(&tmp->list);
__dlm_mle_detach_hb_events(dlm, mle);
}
spin_unlock(&tmp->spinlock);
}
@ -2601,6 +2768,7 @@ void dlm_clean_master_list(struct dlm_ctxt *dlm, u8 dead_node)
struct list_head *iter, *iter2;
struct dlm_master_list_entry *mle;
struct dlm_lock_resource *res;
unsigned int hash;
mlog_entry("dlm=%s, dead node=%u\n", dlm->name, dead_node);
top:
@ -2640,7 +2808,7 @@ top:
* may result in the mle being unlinked and
* freed, but there may still be a process
* waiting in the dlmlock path which is fine. */
mlog(ML_ERROR, "node %u was expected master\n",
mlog(0, "node %u was expected master\n",
dead_node);
atomic_set(&mle->woken, 1);
spin_unlock(&mle->spinlock);
@ -2673,19 +2841,21 @@ top:
/* remove from the list early. NOTE: unlinking
* list_head while in list_for_each_safe */
__dlm_mle_detach_hb_events(dlm, mle);
spin_lock(&mle->spinlock);
list_del_init(&mle->list);
atomic_set(&mle->woken, 1);
spin_unlock(&mle->spinlock);
wake_up(&mle->wq);
mlog(0, "node %u died during migration from "
"%u to %u!\n", dead_node,
mlog(0, "%s: node %u died during migration from "
"%u to %u!\n", dlm->name, dead_node,
mle->master, mle->new_master);
/* if there is a lockres associated with this
* mle, find it and set its owner to UNKNOWN */
hash = dlm_lockid_hash(mle->u.name.name, mle->u.name.len);
res = __dlm_lookup_lockres(dlm, mle->u.name.name,
mle->u.name.len);
mle->u.name.len, hash);
if (res) {
/* unfortunately if we hit this rare case, our
* lock ordering is messed. we need to drop

580
fs/ocfs2/dlm/dlmrecovery.c
View File

@ -115,12 +115,37 @@ static u64 dlm_get_next_mig_cookie(void)
return c;
}
static inline void dlm_set_reco_dead_node(struct dlm_ctxt *dlm,
u8 dead_node)
{
assert_spin_locked(&dlm->spinlock);
if (dlm->reco.dead_node != dead_node)
mlog(0, "%s: changing dead_node from %u to %u\n",
dlm->name, dlm->reco.dead_node, dead_node);
dlm->reco.dead_node = dead_node;
}
static inline void dlm_set_reco_master(struct dlm_ctxt *dlm,
u8 master)
{
assert_spin_locked(&dlm->spinlock);
mlog(0, "%s: changing new_master from %u to %u\n",
dlm->name, dlm->reco.new_master, master);
dlm->reco.new_master = master;
}
static inline void __dlm_reset_recovery(struct dlm_ctxt *dlm)
{
assert_spin_locked(&dlm->spinlock);
clear_bit(dlm->reco.dead_node, dlm->recovery_map);
dlm_set_reco_dead_node(dlm, O2NM_INVALID_NODE_NUM);
dlm_set_reco_master(dlm, O2NM_INVALID_NODE_NUM);
}
static inline void dlm_reset_recovery(struct dlm_ctxt *dlm)
{
spin_lock(&dlm->spinlock);
clear_bit(dlm->reco.dead_node, dlm->recovery_map);
dlm->reco.dead_node = O2NM_INVALID_NODE_NUM;
dlm->reco.new_master = O2NM_INVALID_NODE_NUM;
__dlm_reset_recovery(dlm);
spin_unlock(&dlm->spinlock);
}
@ -132,11 +157,20 @@ void dlm_dispatch_work(void *data)
struct list_head *iter, *iter2;
struct dlm_work_item *item;
dlm_workfunc_t *workfunc;
int tot=0;
if (!dlm_joined(dlm))
return;
spin_lock(&dlm->work_lock);
list_splice_init(&dlm->work_list, &tmp_list);
spin_unlock(&dlm->work_lock);
list_for_each_safe(iter, iter2, &tmp_list) {
tot++;
}
mlog(0, "%s: work thread has %d work items\n", dlm->name, tot);
list_for_each_safe(iter, iter2, &tmp_list) {
item = list_entry(iter, struct dlm_work_item, list);
workfunc = item->func;
@ -220,6 +254,52 @@ void dlm_complete_recovery_thread(struct dlm_ctxt *dlm)
*
*/
static void dlm_print_reco_node_status(struct dlm_ctxt *dlm)
{
struct dlm_reco_node_data *ndata;
struct dlm_lock_resource *res;
mlog(ML_NOTICE, "%s(%d): recovery info, state=%s, dead=%u, master=%u\n",
dlm->name, dlm->dlm_reco_thread_task->pid,
dlm->reco.state & DLM_RECO_STATE_ACTIVE ? "ACTIVE" : "inactive",
dlm->reco.dead_node, dlm->reco.new_master);
list_for_each_entry(ndata, &dlm->reco.node_data, list) {
char *st = "unknown";
switch (ndata->state) {
case DLM_RECO_NODE_DATA_INIT:
st = "init";
break;
case DLM_RECO_NODE_DATA_REQUESTING:
st = "requesting";
break;
case DLM_RECO_NODE_DATA_DEAD:
st = "dead";
break;
case DLM_RECO_NODE_DATA_RECEIVING:
st = "receiving";
break;
case DLM_RECO_NODE_DATA_REQUESTED:
st = "requested";
break;
case DLM_RECO_NODE_DATA_DONE:
st = "done";
break;
case DLM_RECO_NODE_DATA_FINALIZE_SENT:
st = "finalize-sent";
break;
default:
st = "bad";
break;
}
mlog(ML_NOTICE, "%s: reco state, node %u, state=%s\n",
dlm->name, ndata->node_num, st);
}
list_for_each_entry(res, &dlm->reco.resources, recovering) {
mlog(ML_NOTICE, "%s: lockres %.*s on recovering list\n",
dlm->name, res->lockname.len, res->lockname.name);
}
}
#define DLM_RECO_THREAD_TIMEOUT_MS (5 * 1000)
@ -267,11 +347,23 @@ int dlm_is_node_dead(struct dlm_ctxt *dlm, u8 node)
{
int dead;
spin_lock(&dlm->spinlock);
dead = test_bit(node, dlm->domain_map);
dead = !test_bit(node, dlm->domain_map);
spin_unlock(&dlm->spinlock);
return dead;
}
/* returns true if node is no longer in the domain
* could be dead or just not joined */
static int dlm_is_node_recovered(struct dlm_ctxt *dlm, u8 node)
{
int recovered;
spin_lock(&dlm->spinlock);
recovered = !test_bit(node, dlm->recovery_map);
spin_unlock(&dlm->spinlock);
return recovered;
}
int dlm_wait_for_node_death(struct dlm_ctxt *dlm, u8 node, int timeout)
{
if (timeout) {
@ -290,6 +382,24 @@ int dlm_wait_for_node_death(struct dlm_ctxt *dlm, u8 node, int timeout)
return 0;
}
int dlm_wait_for_node_recovery(struct dlm_ctxt *dlm, u8 node, int timeout)
{
if (timeout) {
mlog(0, "%s: waiting %dms for notification of "
"recovery of node %u\n", dlm->name, timeout, node);
wait_event_timeout(dlm->dlm_reco_thread_wq,
dlm_is_node_recovered(dlm, node),
msecs_to_jiffies(timeout));
} else {
mlog(0, "%s: waiting indefinitely for notification "
"of recovery of node %u\n", dlm->name, node);
wait_event(dlm->dlm_reco_thread_wq,
dlm_is_node_recovered(dlm, node));
}
/* for now, return 0 */
return 0;
}
/* callers of the top-level api calls (dlmlock/dlmunlock) should
* block on the dlm->reco.event when recovery is in progress.
* the dlm recovery thread will set this state when it begins
@ -308,6 +418,13 @@ static int dlm_in_recovery(struct dlm_ctxt *dlm)
void dlm_wait_for_recovery(struct dlm_ctxt *dlm)
{
if (dlm_in_recovery(dlm)) {
mlog(0, "%s: reco thread %d in recovery: "
"state=%d, master=%u, dead=%u\n",
dlm->name, dlm->dlm_reco_thread_task->pid,
dlm->reco.state, dlm->reco.new_master,
dlm->reco.dead_node);
}
wait_event(dlm->reco.event, !dlm_in_recovery(dlm));
}
@ -341,7 +458,7 @@ static int dlm_do_recovery(struct dlm_ctxt *dlm)
mlog(0, "new master %u died while recovering %u!\n",
dlm->reco.new_master, dlm->reco.dead_node);
/* unset the new_master, leave dead_node */
dlm->reco.new_master = O2NM_INVALID_NODE_NUM;
dlm_set_reco_master(dlm, O2NM_INVALID_NODE_NUM);
}
/* select a target to recover */
@ -350,14 +467,14 @@ static int dlm_do_recovery(struct dlm_ctxt *dlm)
bit = find_next_bit (dlm->recovery_map, O2NM_MAX_NODES+1, 0);
if (bit >= O2NM_MAX_NODES || bit < 0)
dlm->reco.dead_node = O2NM_INVALID_NODE_NUM;
dlm_set_reco_dead_node(dlm, O2NM_INVALID_NODE_NUM);
else
dlm->reco.dead_node = bit;
dlm_set_reco_dead_node(dlm, bit);
} else if (!test_bit(dlm->reco.dead_node, dlm->recovery_map)) {
/* BUG? */
mlog(ML_ERROR, "dead_node %u no longer in recovery map!\n",
dlm->reco.dead_node);
dlm->reco.dead_node = O2NM_INVALID_NODE_NUM;
dlm_set_reco_dead_node(dlm, O2NM_INVALID_NODE_NUM);
}
if (dlm->reco.dead_node == O2NM_INVALID_NODE_NUM) {
@ -366,7 +483,8 @@ static int dlm_do_recovery(struct dlm_ctxt *dlm)
/* return to main thread loop and sleep. */
return 0;
}
mlog(0, "recovery thread found node %u in the recovery map!\n",
mlog(0, "%s(%d):recovery thread found node %u in the recovery map!\n",
dlm->name, dlm->dlm_reco_thread_task->pid,
dlm->reco.dead_node);
spin_unlock(&dlm->spinlock);
@ -389,8 +507,8 @@ static int dlm_do_recovery(struct dlm_ctxt *dlm)
}
mlog(0, "another node will master this recovery session.\n");
}
mlog(0, "dlm=%s, new_master=%u, this node=%u, dead_node=%u\n",
dlm->name, dlm->reco.new_master,
mlog(0, "dlm=%s (%d), new_master=%u, this node=%u, dead_node=%u\n",
dlm->name, dlm->dlm_reco_thread_task->pid, dlm->reco.new_master,
dlm->node_num, dlm->reco.dead_node);
/* it is safe to start everything back up here
@ -402,11 +520,13 @@ static int dlm_do_recovery(struct dlm_ctxt *dlm)
return 0;
master_here:
mlog(0, "mastering recovery of %s:%u here(this=%u)!\n",
mlog(0, "(%d) mastering recovery of %s:%u here(this=%u)!\n",
dlm->dlm_reco_thread_task->pid,
dlm->name, dlm->reco.dead_node, dlm->node_num);
status = dlm_remaster_locks(dlm, dlm->reco.dead_node);
if (status < 0) {
/* we should never hit this anymore */
mlog(ML_ERROR, "error %d remastering locks for node %u, "
"retrying.\n", status, dlm->reco.dead_node);
/* yield a bit to allow any final network messages
@ -433,9 +553,16 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
int destroy = 0;
int pass = 0;
status = dlm_init_recovery_area(dlm, dead_node);
if (status < 0)
goto leave;
do {
/* we have become recovery master. there is no escaping
* this, so just keep trying until we get it. */
status = dlm_init_recovery_area(dlm, dead_node);
if (status < 0) {
mlog(ML_ERROR, "%s: failed to alloc recovery area, "
"retrying\n", dlm->name);
msleep(1000);
}
} while (status != 0);
/* safe to access the node data list without a lock, since this
* process is the only one to change the list */
@ -452,16 +579,36 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
continue;
}
status = dlm_request_all_locks(dlm, ndata->node_num, dead_node);
if (status < 0) {
mlog_errno(status);
if (dlm_is_host_down(status))
ndata->state = DLM_RECO_NODE_DATA_DEAD;
else {
destroy = 1;
goto leave;
do {
status = dlm_request_all_locks(dlm, ndata->node_num,
dead_node);
if (status < 0) {
mlog_errno(status);
if (dlm_is_host_down(status)) {
/* node died, ignore it for recovery */
status = 0;
ndata->state = DLM_RECO_NODE_DATA_DEAD;
/* wait for the domain map to catch up
* with the network state. */
wait_event_timeout(dlm->dlm_reco_thread_wq,
dlm_is_node_dead(dlm,
ndata->node_num),
msecs_to_jiffies(1000));
mlog(0, "waited 1 sec for %u, "
"dead? %s\n", ndata->node_num,
dlm_is_node_dead(dlm, ndata->node_num) ?
"yes" : "no");
} else {
/* -ENOMEM on the other node */
mlog(0, "%s: node %u returned "
"%d during recovery, retrying "
"after a short wait\n",
dlm->name, ndata->node_num,
status);
msleep(100);
}
}
}
} while (status != 0);
switch (ndata->state) {
case DLM_RECO_NODE_DATA_INIT:
@ -473,10 +620,9 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
mlog(0, "node %u died after requesting "
"recovery info for node %u\n",
ndata->node_num, dead_node);
// start all over
destroy = 1;
status = -EAGAIN;
goto leave;
/* fine. don't need this node's info.
* continue without it. */
break;
case DLM_RECO_NODE_DATA_REQUESTING:
ndata->state = DLM_RECO_NODE_DATA_REQUESTED;
mlog(0, "now receiving recovery data from "
@ -520,35 +666,26 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
BUG();
break;
case DLM_RECO_NODE_DATA_DEAD:
mlog(ML_NOTICE, "node %u died after "
mlog(0, "node %u died after "
"requesting recovery info for "
"node %u\n", ndata->node_num,
dead_node);
spin_unlock(&dlm_reco_state_lock);
// start all over
destroy = 1;
status = -EAGAIN;
/* instead of spinning like crazy here,
* wait for the domain map to catch up
* with the network state. otherwise this
* can be hit hundreds of times before
* the node is really seen as dead. */
wait_event_timeout(dlm->dlm_reco_thread_wq,
dlm_is_node_dead(dlm,
ndata->node_num),
msecs_to_jiffies(1000));
mlog(0, "waited 1 sec for %u, "
"dead? %s\n", ndata->node_num,
dlm_is_node_dead(dlm, ndata->node_num) ?
"yes" : "no");
goto leave;
break;
case DLM_RECO_NODE_DATA_RECEIVING:
case DLM_RECO_NODE_DATA_REQUESTED:
mlog(0, "%s: node %u still in state %s\n",
dlm->name, ndata->node_num,
ndata->state==DLM_RECO_NODE_DATA_RECEIVING ?
"receiving" : "requested");
all_nodes_done = 0;
break;
case DLM_RECO_NODE_DATA_DONE:
mlog(0, "%s: node %u state is done\n",
dlm->name, ndata->node_num);
break;
case DLM_RECO_NODE_DATA_FINALIZE_SENT:
mlog(0, "%s: node %u state is finalize\n",
dlm->name, ndata->node_num);
break;
}
}
@ -578,7 +715,7 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
jiffies, dlm->reco.dead_node,
dlm->node_num, dlm->reco.new_master);
destroy = 1;
status = ret;
status = 0;
/* rescan everything marked dirty along the way */
dlm_kick_thread(dlm, NULL);
break;
@ -591,7 +728,6 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
}
leave:
if (destroy)
dlm_destroy_recovery_area(dlm, dead_node);
@ -617,7 +753,7 @@ static int dlm_init_recovery_area(struct dlm_ctxt *dlm, u8 dead_node)
}
BUG_ON(num == dead_node);
ndata = kcalloc(1, sizeof(*ndata), GFP_KERNEL);
ndata = kcalloc(1, sizeof(*ndata), GFP_NOFS);
if (!ndata) {
dlm_destroy_recovery_area(dlm, dead_node);
return -ENOMEM;
@ -691,16 +827,25 @@ int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data)
if (!dlm_grab(dlm))
return -EINVAL;
if (lr->dead_node != dlm->reco.dead_node) {
mlog(ML_ERROR, "%s: node %u sent dead_node=%u, but local "
"dead_node is %u\n", dlm->name, lr->node_idx,
lr->dead_node, dlm->reco.dead_node);
dlm_print_reco_node_status(dlm);
/* this is a hack */
dlm_put(dlm);
return -ENOMEM;
}
BUG_ON(lr->dead_node != dlm->reco.dead_node);
item = kcalloc(1, sizeof(*item), GFP_KERNEL);
item = kcalloc(1, sizeof(*item), GFP_NOFS);
if (!item) {
dlm_put(dlm);
return -ENOMEM;
}
/* this will get freed by dlm_request_all_locks_worker */
buf = (char *) __get_free_page(GFP_KERNEL);
buf = (char *) __get_free_page(GFP_NOFS);
if (!buf) {
kfree(item);
dlm_put(dlm);
@ -715,7 +860,7 @@ int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data)
spin_lock(&dlm->work_lock);
list_add_tail(&item->list, &dlm->work_list);
spin_unlock(&dlm->work_lock);
schedule_work(&dlm->dispatched_work);
queue_work(dlm->dlm_worker, &dlm->dispatched_work);
dlm_put(dlm);
return 0;
@ -730,32 +875,34 @@ static void dlm_request_all_locks_worker(struct dlm_work_item *item, void *data)
struct list_head *iter;
int ret;
u8 dead_node, reco_master;
int skip_all_done = 0;
dlm = item->dlm;
dead_node = item->u.ral.dead_node;
reco_master = item->u.ral.reco_master;
mres = (struct dlm_migratable_lockres *)data;
mlog(0, "%s: recovery worker started, dead=%u, master=%u\n",
dlm->name, dead_node, reco_master);
if (dead_node != dlm->reco.dead_node ||
reco_master != dlm->reco.new_master) {
/* show extra debug info if the recovery state is messed */
mlog(ML_ERROR, "%s: bad reco state: reco(dead=%u, master=%u), "
"request(dead=%u, master=%u)\n",
dlm->name, dlm->reco.dead_node, dlm->reco.new_master,
dead_node, reco_master);
mlog(ML_ERROR, "%s: name=%.*s master=%u locks=%u/%u flags=%u "
"entry[0]={c=%u:%llu,l=%u,f=%u,t=%d,ct=%d,hb=%d,n=%u}\n",
dlm->name, mres->lockname_len, mres->lockname, mres->master,
mres->num_locks, mres->total_locks, mres->flags,
dlm_get_lock_cookie_node(mres->ml[0].cookie),
dlm_get_lock_cookie_seq(mres->ml[0].cookie),
mres->ml[0].list, mres->ml[0].flags,
mres->ml[0].type, mres->ml[0].convert_type,
mres->ml[0].highest_blocked, mres->ml[0].node);
BUG();
/* worker could have been created before the recovery master
* died. if so, do not continue, but do not error. */
if (dlm->reco.new_master == O2NM_INVALID_NODE_NUM) {
mlog(ML_NOTICE, "%s: will not send recovery state, "
"recovery master %u died, thread=(dead=%u,mas=%u)"
" current=(dead=%u,mas=%u)\n", dlm->name,
reco_master, dead_node, reco_master,
dlm->reco.dead_node, dlm->reco.new_master);
} else {
mlog(ML_NOTICE, "%s: reco state invalid: reco(dead=%u, "
"master=%u), request(dead=%u, master=%u)\n",
dlm->name, dlm->reco.dead_node,
dlm->reco.new_master, dead_node, reco_master);
}
goto leave;
}
BUG_ON(dead_node != dlm->reco.dead_node);
BUG_ON(reco_master != dlm->reco.new_master);
/* lock resources should have already been moved to the
* dlm->reco.resources list. now move items from that list
@ -766,12 +913,20 @@ static void dlm_request_all_locks_worker(struct dlm_work_item *item, void *data)
dlm_move_reco_locks_to_list(dlm, &resources, dead_node);
/* now we can begin blasting lockreses without the dlm lock */
/* any errors returned will be due to the new_master dying,
* the dlm_reco_thread should detect this */
list_for_each(iter, &resources) {
res = list_entry (iter, struct dlm_lock_resource, recovering);
ret = dlm_send_one_lockres(dlm, res, mres, reco_master,
DLM_MRES_RECOVERY);
if (ret < 0)
mlog_errno(ret);
if (ret < 0) {
mlog(ML_ERROR, "%s: node %u went down while sending "
"recovery state for dead node %u, ret=%d\n", dlm->name,
reco_master, dead_node, ret);
skip_all_done = 1;
break;
}
}
/* move the resources back to the list */
@ -779,10 +934,15 @@ static void dlm_request_all_locks_worker(struct dlm_work_item *item, void *data)
list_splice_init(&resources, &dlm->reco.resources);
spin_unlock(&dlm->spinlock);
ret = dlm_send_all_done_msg(dlm, dead_node, reco_master);
if (ret < 0)
mlog_errno(ret);
if (!skip_all_done) {
ret = dlm_send_all_done_msg(dlm, dead_node, reco_master);
if (ret < 0) {
mlog(ML_ERROR, "%s: node %u went down while sending "
"recovery all-done for dead node %u, ret=%d\n",
dlm->name, reco_master, dead_node, ret);
}
}
leave:
free_page((unsigned long)data);
}
@ -801,8 +961,14 @@ static int dlm_send_all_done_msg(struct dlm_ctxt *dlm, u8 dead_node, u8 send_to)
ret = o2net_send_message(DLM_RECO_DATA_DONE_MSG, dlm->key, &done_msg,
sizeof(done_msg), send_to, &tmpret);
/* negative status is ignored by the caller */
if (ret >= 0)
if (ret < 0) {
if (!dlm_is_host_down(ret)) {
mlog_errno(ret);
mlog(ML_ERROR, "%s: unknown error sending data-done "
"to %u\n", dlm->name, send_to);
BUG();
}
} else
ret = tmpret;
return ret;
}
@ -822,7 +988,11 @@ int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data)
mlog(0, "got DATA DONE: dead_node=%u, reco.dead_node=%u, "
"node_idx=%u, this node=%u\n", done->dead_node,
dlm->reco.dead_node, done->node_idx, dlm->node_num);
BUG_ON(done->dead_node != dlm->reco.dead_node);
mlog_bug_on_msg((done->dead_node != dlm->reco.dead_node),
"Got DATA DONE: dead_node=%u, reco.dead_node=%u, "
"node_idx=%u, this node=%u\n", done->dead_node,
dlm->reco.dead_node, done->node_idx, dlm->node_num);
spin_lock(&dlm_reco_state_lock);
list_for_each(iter, &dlm->reco.node_data) {
@ -1021,8 +1191,9 @@ static int dlm_add_lock_to_array(struct dlm_lock *lock,
ml->type == LKM_PRMODE) {
/* if it is already set, this had better be a PR
* and it has to match */
if (mres->lvb[0] && (ml->type == LKM_EXMODE ||
memcmp(mres->lvb, lock->lksb->lvb, DLM_LVB_LEN))) {
if (!dlm_lvb_is_empty(mres->lvb) &&
(ml->type == LKM_EXMODE ||
memcmp(mres->lvb, lock->lksb->lvb, DLM_LVB_LEN))) {
mlog(ML_ERROR, "mismatched lvbs!\n");
__dlm_print_one_lock_resource(lock->lockres);
BUG();
@ -1081,22 +1252,25 @@ int dlm_send_one_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
* we must send it immediately. */
ret = dlm_send_mig_lockres_msg(dlm, mres, send_to,
res, total_locks);
if (ret < 0) {
// TODO
mlog(ML_ERROR, "dlm_send_mig_lockres_msg "
"returned %d, TODO\n", ret);
BUG();
}
if (ret < 0)
goto error;
}
}
/* flush any remaining locks */
ret = dlm_send_mig_lockres_msg(dlm, mres, send_to, res, total_locks);
if (ret < 0) {
// TODO
mlog(ML_ERROR, "dlm_send_mig_lockres_msg returned %d, "
"TODO\n", ret);
if (ret < 0)
goto error;
return ret;
error:
mlog(ML_ERROR, "%s: dlm_send_mig_lockres_msg returned %d\n",
dlm->name, ret);
if (!dlm_is_host_down(ret))
BUG();
}
mlog(0, "%s: node %u went down while sending %s "
"lockres %.*s\n", dlm->name, send_to,
flags & DLM_MRES_RECOVERY ? "recovery" : "migration",
res->lockname.len, res->lockname.name);
return ret;
}
@ -1144,8 +1318,8 @@ int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data)
mlog(0, "all done flag. all lockres data received!\n");
ret = -ENOMEM;
buf = kmalloc(be16_to_cpu(msg->data_len), GFP_KERNEL);
item = kcalloc(1, sizeof(*item), GFP_KERNEL);
buf = kmalloc(be16_to_cpu(msg->data_len), GFP_NOFS);
item = kcalloc(1, sizeof(*item), GFP_NOFS);
if (!buf || !item)
goto leave;
@ -1236,7 +1410,7 @@ int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data)
spin_lock(&dlm->work_lock);
list_add_tail(&item->list, &dlm->work_list);
spin_unlock(&dlm->work_lock);
schedule_work(&dlm->dispatched_work);
queue_work(dlm->dlm_worker, &dlm->dispatched_work);
leave:
dlm_put(dlm);
@ -1404,6 +1578,7 @@ int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data)
struct dlm_ctxt *dlm = data;
struct dlm_master_requery *req = (struct dlm_master_requery *)msg->buf;
struct dlm_lock_resource *res = NULL;
unsigned int hash;
int master = DLM_LOCK_RES_OWNER_UNKNOWN;
u32 flags = DLM_ASSERT_MASTER_REQUERY;
@ -1413,8 +1588,10 @@ int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data)
return master;
}
hash = dlm_lockid_hash(req->name, req->namelen);
spin_lock(&dlm->spinlock);
res = __dlm_lookup_lockres(dlm, req->name, req->namelen);
res = __dlm_lookup_lockres(dlm, req->name, req->namelen, hash);
if (res) {
spin_lock(&res->spinlock);
master = res->owner;
@ -1481,7 +1658,7 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm,
struct dlm_lock *newlock = NULL;
struct dlm_lockstatus *lksb = NULL;
int ret = 0;
int i;
int i, bad;
struct list_head *iter;
struct dlm_lock *lock = NULL;
@ -1550,28 +1727,48 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm,
}
lksb->flags |= (ml->flags &
(DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB));
if (mres->lvb[0]) {
if (ml->type == LKM_NLMODE)
goto skip_lvb;
if (!dlm_lvb_is_empty(mres->lvb)) {
if (lksb->flags & DLM_LKSB_PUT_LVB) {
/* other node was trying to update
* lvb when node died. recreate the
* lksb with the updated lvb. */
memcpy(lksb->lvb, mres->lvb, DLM_LVB_LEN);
/* the lock resource lvb update must happen
* NOW, before the spinlock is dropped.
* we no longer wait for the AST to update
* the lvb. */
memcpy(res->lvb, mres->lvb, DLM_LVB_LEN);
} else {
/* otherwise, the node is sending its
* most recent valid lvb info */
BUG_ON(ml->type != LKM_EXMODE &&
ml->type != LKM_PRMODE);
if (res->lvb[0] && (ml->type == LKM_EXMODE ||
memcmp(res->lvb, mres->lvb, DLM_LVB_LEN))) {
mlog(ML_ERROR, "received bad lvb!\n");
__dlm_print_one_lock_resource(res);
BUG();
if (!dlm_lvb_is_empty(res->lvb) &&
(ml->type == LKM_EXMODE ||
memcmp(res->lvb, mres->lvb, DLM_LVB_LEN))) {
int i;
mlog(ML_ERROR, "%s:%.*s: received bad "
"lvb! type=%d\n", dlm->name,
res->lockname.len,
res->lockname.name, ml->type);
printk("lockres lvb=[");
for (i=0; i<DLM_LVB_LEN; i++)
printk("%02x", res->lvb[i]);
printk("]\nmigrated lvb=[");
for (i=0; i<DLM_LVB_LEN; i++)
printk("%02x", mres->lvb[i]);
printk("]\n");
dlm_print_one_lock_resource(res);
BUG();
}
memcpy(res->lvb, mres->lvb, DLM_LVB_LEN);
}
}
skip_lvb:
/* NOTE:
* wrt lock queue ordering and recovery:
@ -1589,9 +1786,33 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm,
* relative to each other, but clearly *not*
* preserved relative to locks from other nodes.
*/
bad = 0;
spin_lock(&res->spinlock);
dlm_lock_get(newlock);
list_add_tail(&newlock->list, queue);
list_for_each_entry(lock, queue, list) {
if (lock->ml.cookie == ml->cookie) {
u64 c = lock->ml.cookie;
mlog(ML_ERROR, "%s:%.*s: %u:%llu: lock already "
"exists on this lockres!\n", dlm->name,
res->lockname.len, res->lockname.name,
dlm_get_lock_cookie_node(c),
dlm_get_lock_cookie_seq(c));
mlog(ML_NOTICE, "sent lock: type=%d, conv=%d, "
"node=%u, cookie=%u:%llu, queue=%d\n",
ml->type, ml->convert_type, ml->node,
dlm_get_lock_cookie_node(ml->cookie),
dlm_get_lock_cookie_seq(ml->cookie),
ml->list);
__dlm_print_one_lock_resource(res);
bad = 1;
break;
}
}
if (!bad) {
dlm_lock_get(newlock);
list_add_tail(&newlock->list, queue);
}
spin_unlock(&res->spinlock);
}
mlog(0, "done running all the locks\n");
@ -1615,8 +1836,14 @@ void dlm_move_lockres_to_recovery_list(struct dlm_ctxt *dlm,
struct dlm_lock *lock;
res->state |= DLM_LOCK_RES_RECOVERING;
if (!list_empty(&res->recovering))
if (!list_empty(&res->recovering)) {
mlog(0,
"Recovering res %s:%.*s, is already on recovery list!\n",
dlm->name, res->lockname.len, res->lockname.name);
list_del_init(&res->recovering);
}
/* We need to hold a reference while on the recovery list */
dlm_lockres_get(res);
list_add_tail(&res->recovering, &dlm->reco.resources);
/* find any pending locks and put them back on proper list */
@ -1705,9 +1932,11 @@ static void dlm_finish_local_lockres_recovery(struct dlm_ctxt *dlm,
spin_lock(&res->spinlock);
dlm_change_lockres_owner(dlm, res, new_master);
res->state &= ~DLM_LOCK_RES_RECOVERING;
__dlm_dirty_lockres(dlm, res);
if (!__dlm_lockres_unused(res))
__dlm_dirty_lockres(dlm, res);
spin_unlock(&res->spinlock);
wake_up(&res->wq);
dlm_lockres_put(res);
}
}
@ -1716,7 +1945,7 @@ static void dlm_finish_local_lockres_recovery(struct dlm_ctxt *dlm,
* the RECOVERING state and set the owner
* if necessary */
for (i = 0; i < DLM_HASH_BUCKETS; i++) {
bucket = &(dlm->lockres_hash[i]);
bucket = dlm_lockres_hash(dlm, i);
hlist_for_each_entry(res, hash_iter, bucket, hash_node) {
if (res->state & DLM_LOCK_RES_RECOVERING) {
if (res->owner == dead_node) {
@ -1740,11 +1969,13 @@ static void dlm_finish_local_lockres_recovery(struct dlm_ctxt *dlm,
dlm->name, res->lockname.len,
res->lockname.name, res->owner);
list_del_init(&res->recovering);
dlm_lockres_put(res);
}
spin_lock(&res->spinlock);
dlm_change_lockres_owner(dlm, res, new_master);
res->state &= ~DLM_LOCK_RES_RECOVERING;
__dlm_dirty_lockres(dlm, res);
if (!__dlm_lockres_unused(res))
__dlm_dirty_lockres(dlm, res);
spin_unlock(&res->spinlock);
wake_up(&res->wq);
}
@ -1881,7 +2112,7 @@ static void dlm_do_local_recovery_cleanup(struct dlm_ctxt *dlm, u8 dead_node)
* need to be fired as a result.
*/
for (i = 0; i < DLM_HASH_BUCKETS; i++) {
bucket = &(dlm->lockres_hash[i]);
bucket = dlm_lockres_hash(dlm, i);
hlist_for_each_entry(res, iter, bucket, hash_node) {
/* always prune any $RECOVERY entries for dead nodes,
* otherwise hangs can occur during later recovery */
@ -1921,6 +2152,20 @@ static void __dlm_hb_node_down(struct dlm_ctxt *dlm, int idx)
{
assert_spin_locked(&dlm->spinlock);
if (dlm->reco.new_master == idx) {
mlog(0, "%s: recovery master %d just died\n",
dlm->name, idx);
if (dlm->reco.state & DLM_RECO_STATE_FINALIZE) {
/* finalize1 was reached, so it is safe to clear
* the new_master and dead_node. that recovery
* is complete. */
mlog(0, "%s: dead master %d had reached "
"finalize1 state, clearing\n", dlm->name, idx);
dlm->reco.state &= ~DLM_RECO_STATE_FINALIZE;
__dlm_reset_recovery(dlm);
}
}
/* check to see if the node is already considered dead */
if (!test_bit(idx, dlm->live_nodes_map)) {
mlog(0, "for domain %s, node %d is already dead. "
@ -2084,7 +2329,7 @@ again:
/* set the new_master to this node */
spin_lock(&dlm->spinlock);
dlm->reco.new_master = dlm->node_num;
dlm_set_reco_master(dlm, dlm->node_num);
spin_unlock(&dlm->spinlock);
}
@ -2122,6 +2367,10 @@ again:
mlog(0, "%s: reco master %u is ready to recover %u\n",
dlm->name, dlm->reco.new_master, dlm->reco.dead_node);
status = -EEXIST;
} else if (ret == DLM_RECOVERING) {
mlog(0, "dlm=%s dlmlock says master node died (this=%u)\n",
dlm->name, dlm->node_num);
goto again;
} else {
struct dlm_lock_resource *res;
@ -2153,7 +2402,7 @@ static int dlm_send_begin_reco_message(struct dlm_ctxt *dlm, u8 dead_node)
mlog_entry("%u\n", dead_node);
mlog(0, "dead node is %u\n", dead_node);
mlog(0, "%s: dead node is %u\n", dlm->name, dead_node);
spin_lock(&dlm->spinlock);
dlm_node_iter_init(dlm->domain_map, &iter);
@ -2211,6 +2460,14 @@ retry:
* another ENOMEM */
msleep(100);
goto retry;
} else if (ret == EAGAIN) {
mlog(0, "%s: trying to start recovery of node "
"%u, but node %u is waiting for last recovery "
"to complete, backoff for a bit\n", dlm->name,
dead_node, nodenum);
/* TODO Look into replacing msleep with cond_resched() */
msleep(100);
goto retry;
}
}
@ -2226,8 +2483,20 @@ int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data)
if (!dlm_grab(dlm))
return 0;
mlog(0, "node %u wants to recover node %u\n",
br->node_idx, br->dead_node);
spin_lock(&dlm->spinlock);
if (dlm->reco.state & DLM_RECO_STATE_FINALIZE) {
mlog(0, "%s: node %u wants to recover node %u (%u:%u) "
"but this node is in finalize state, waiting on finalize2\n",
dlm->name, br->node_idx, br->dead_node,
dlm->reco.dead_node, dlm->reco.new_master);
spin_unlock(&dlm->spinlock);
return EAGAIN;
}
spin_unlock(&dlm->spinlock);
mlog(0, "%s: node %u wants to recover node %u (%u:%u)\n",
dlm->name, br->node_idx, br->dead_node,
dlm->reco.dead_node, dlm->reco.new_master);
dlm_fire_domain_eviction_callbacks(dlm, br->dead_node);
@ -2249,8 +2518,8 @@ int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data)
"node %u changing it to %u\n", dlm->name,
dlm->reco.dead_node, br->node_idx, br->dead_node);
}
dlm->reco.new_master = br->node_idx;
dlm->reco.dead_node = br->dead_node;
dlm_set_reco_master(dlm, br->node_idx);
dlm_set_reco_dead_node(dlm, br->dead_node);
if (!test_bit(br->dead_node, dlm->recovery_map)) {
mlog(0, "recovery master %u sees %u as dead, but this "
"node has not yet. marking %u as dead\n",
@ -2269,10 +2538,16 @@ int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data)
spin_unlock(&dlm->spinlock);
dlm_kick_recovery_thread(dlm);
mlog(0, "%s: recovery started by node %u, for %u (%u:%u)\n",
dlm->name, br->node_idx, br->dead_node,
dlm->reco.dead_node, dlm->reco.new_master);
dlm_put(dlm);
return 0;
}
#define DLM_FINALIZE_STAGE2 0x01
static int dlm_send_finalize_reco_message(struct dlm_ctxt *dlm)
{
int ret = 0;
@ -2280,25 +2555,31 @@ static int dlm_send_finalize_reco_message(struct dlm_ctxt *dlm)
struct dlm_node_iter iter;
int nodenum;
int status;
int stage = 1;
mlog(0, "finishing recovery for node %s:%u\n",
dlm->name, dlm->reco.dead_node);
mlog(0, "finishing recovery for node %s:%u, "
"stage %d\n", dlm->name, dlm->reco.dead_node, stage);
spin_lock(&dlm->spinlock);
dlm_node_iter_init(dlm->domain_map, &iter);
spin_unlock(&dlm->spinlock);
stage2:
memset(&fr, 0, sizeof(fr));
fr.node_idx = dlm->node_num;
fr.dead_node = dlm->reco.dead_node;
if (stage == 2)
fr.flags |= DLM_FINALIZE_STAGE2;
while ((nodenum = dlm_node_iter_next(&iter)) >= 0) {
if (nodenum == dlm->node_num)
continue;
ret = o2net_send_message(DLM_FINALIZE_RECO_MSG, dlm->key,
&fr, sizeof(fr), nodenum, &status);
if (ret >= 0) {
if (ret >= 0)
ret = status;
if (ret < 0) {
mlog_errno(ret);
if (dlm_is_host_down(ret)) {
/* this has no effect on this recovery
* session, so set the status to zero to
@ -2306,13 +2587,17 @@ static int dlm_send_finalize_reco_message(struct dlm_ctxt *dlm)
mlog(ML_ERROR, "node %u went down after this "
"node finished recovery.\n", nodenum);
ret = 0;
continue;
}
}
if (ret < 0) {
mlog_errno(ret);
break;
}
}
if (stage == 1) {
/* reset the node_iter back to the top and send finalize2 */
iter.curnode = -1;
stage = 2;
goto stage2;
}
return ret;
}
@ -2321,14 +2606,19 @@ int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data)
{
struct dlm_ctxt *dlm = data;
struct dlm_finalize_reco *fr = (struct dlm_finalize_reco *)msg->buf;
int stage = 1;
/* ok to return 0, domain has gone away */
if (!dlm_grab(dlm))
return 0;
mlog(0, "node %u finalizing recovery of node %u\n",
fr->node_idx, fr->dead_node);
if (fr->flags & DLM_FINALIZE_STAGE2)
stage = 2;
mlog(0, "%s: node %u finalizing recovery stage%d of "
"node %u (%u:%u)\n", dlm->name, fr->node_idx, stage,
fr->dead_node, dlm->reco.dead_node, dlm->reco.new_master);
spin_lock(&dlm->spinlock);
if (dlm->reco.new_master != fr->node_idx) {
@ -2344,13 +2634,41 @@ int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data)
BUG();
}
dlm_finish_local_lockres_recovery(dlm, fr->dead_node, fr->node_idx);
switch (stage) {
case 1:
dlm_finish_local_lockres_recovery(dlm, fr->dead_node, fr->node_idx);
if (dlm->reco.state & DLM_RECO_STATE_FINALIZE) {
mlog(ML_ERROR, "%s: received finalize1 from "
"new master %u for dead node %u, but "
"this node has already received it!\n",
dlm->name, fr->node_idx, fr->dead_node);
dlm_print_reco_node_status(dlm);
BUG();
}
dlm->reco.state |= DLM_RECO_STATE_FINALIZE;
spin_unlock(&dlm->spinlock);
break;
case 2:
if (!(dlm->reco.state & DLM_RECO_STATE_FINALIZE)) {
mlog(ML_ERROR, "%s: received finalize2 from "
"new master %u for dead node %u, but "
"this node did not have finalize1!\n",
dlm->name, fr->node_idx, fr->dead_node);
dlm_print_reco_node_status(dlm);
BUG();
}
dlm->reco.state &= ~DLM_RECO_STATE_FINALIZE;
spin_unlock(&dlm->spinlock);
dlm_reset_recovery(dlm);
dlm_kick_recovery_thread(dlm);
break;
default:
BUG();
}
spin_unlock(&dlm->spinlock);
mlog(0, "%s: recovery done, reco master was %u, dead now %u, master now %u\n",
dlm->name, fr->node_idx, dlm->reco.dead_node, dlm->reco.new_master);
dlm_reset_recovery(dlm);
dlm_kick_recovery_thread(dlm);
dlm_put(dlm);
return 0;
}

68
fs/ocfs2/dlm/dlmthread.c
View File

@ -39,6 +39,7 @@
#include <linux/inet.h>
#include <linux/timer.h>
#include <linux/kthread.h>
#include <linux/delay.h>
#include "cluster/heartbeat.h"
@ -53,6 +54,8 @@
#include "cluster/masklog.h"
static int dlm_thread(void *data);
static void dlm_purge_lockres_now(struct dlm_ctxt *dlm,
struct dlm_lock_resource *lockres);
static void dlm_flush_asts(struct dlm_ctxt *dlm);
@ -80,7 +83,7 @@ repeat:
}
static int __dlm_lockres_unused(struct dlm_lock_resource *res)
int __dlm_lockres_unused(struct dlm_lock_resource *res)
{
if (list_empty(&res->granted) &&
list_empty(&res->converting) &&
@ -103,6 +106,20 @@ void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm,
assert_spin_locked(&res->spinlock);
if (__dlm_lockres_unused(res)){
/* For now, just keep any resource we master */
if (res->owner == dlm->node_num)
{
if (!list_empty(&res->purge)) {
mlog(0, "we master %s:%.*s, but it is on "
"the purge list. Removing\n",
dlm->name, res->lockname.len,
res->lockname.name);
list_del_init(&res->purge);
dlm->purge_count--;
}
return;
}
if (list_empty(&res->purge)) {
mlog(0, "putting lockres %.*s from purge list\n",
res->lockname.len, res->lockname.name);
@ -110,10 +127,23 @@ void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm,
res->last_used = jiffies;
list_add_tail(&res->purge, &dlm->purge_list);
dlm->purge_count++;
/* if this node is not the owner, there is
* no way to keep track of who the owner could be.
* unhash it to avoid serious problems. */
if (res->owner != dlm->node_num) {
mlog(0, "%s:%.*s: doing immediate "
"purge of lockres owned by %u\n",
dlm->name, res->lockname.len,
res->lockname.name, res->owner);
dlm_purge_lockres_now(dlm, res);
}
}
} else if (!list_empty(&res->purge)) {
mlog(0, "removing lockres %.*s from purge list\n",
res->lockname.len, res->lockname.name);
mlog(0, "removing lockres %.*s from purge list, "
"owner=%u\n", res->lockname.len, res->lockname.name,
res->owner);
list_del_init(&res->purge);
dlm->purge_count--;
@ -165,6 +195,7 @@ again:
} else if (ret < 0) {
mlog(ML_NOTICE, "lockres %.*s: migrate failed, retrying\n",
lockres->lockname.len, lockres->lockname.name);
msleep(100);
goto again;
}
@ -178,6 +209,24 @@ finish:
__dlm_unhash_lockres(lockres);
}
/* make an unused lockres go away immediately.
* as soon as the dlm spinlock is dropped, this lockres
* will not be found. kfree still happens on last put. */
static void dlm_purge_lockres_now(struct dlm_ctxt *dlm,
struct dlm_lock_resource *lockres)
{
assert_spin_locked(&dlm->spinlock);
assert_spin_locked(&lockres->spinlock);
BUG_ON(!__dlm_lockres_unused(lockres));
if (!list_empty(&lockres->purge)) {
list_del_init(&lockres->purge);
dlm->purge_count--;
}
__dlm_unhash_lockres(lockres);
}
static void dlm_run_purge_list(struct dlm_ctxt *dlm,
int purge_now)
{
@ -420,6 +469,8 @@ void __dlm_dirty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res)
/* don't shuffle secondary queues */
if ((res->owner == dlm->node_num) &&
!(res->state & DLM_LOCK_RES_DIRTY)) {
/* ref for dirty_list */
dlm_lockres_get(res);
list_add_tail(&res->dirty, &dlm->dirty_list);
res->state |= DLM_LOCK_RES_DIRTY;
}
@ -604,6 +655,8 @@ static int dlm_thread(void *data)
list_del_init(&res->dirty);
spin_unlock(&res->spinlock);
spin_unlock(&dlm->spinlock);
/* Drop dirty_list ref */
dlm_lockres_put(res);
/* lockres can be re-dirtied/re-added to the
* dirty_list in this gap, but that is ok */
@ -640,8 +693,9 @@ static int dlm_thread(void *data)
* spinlock and do NOT have the dlm lock.
* safe to reserve/queue asts and run the lists. */
mlog(0, "calling dlm_shuffle_lists with dlm=%p, "
"res=%p\n", dlm, res);
mlog(0, "calling dlm_shuffle_lists with dlm=%s, "
"res=%.*s\n", dlm->name,
res->lockname.len, res->lockname.name);
/* called while holding lockres lock */
dlm_shuffle_lists(dlm, res);
@ -655,6 +709,8 @@ in_progress:
/* if the lock was in-progress, stick
* it on the back of the list */
if (delay) {
/* ref for dirty_list */
dlm_lockres_get(res);
spin_lock(&res->spinlock);
list_add_tail(&res->dirty, &dlm->dirty_list);
res->state |= DLM_LOCK_RES_DIRTY;
@ -675,7 +731,7 @@ in_progress:
/* yield and continue right away if there is more work to do */
if (!n) {
yield();
cond_resched();
continue;
}

10
fs/ocfs2/dlm/dlmunlock.c
View File

@ -318,6 +318,16 @@ static enum dlm_status dlm_send_remote_unlock_request(struct dlm_ctxt *dlm,
mlog_entry("%.*s\n", res->lockname.len, res->lockname.name);
if (owner == dlm->node_num) {
/* ended up trying to contact ourself. this means
* that the lockres had been remote but became local
* via a migration. just retry it, now as local */
mlog(0, "%s:%.*s: this node became the master due to a "
"migration, re-evaluate now\n", dlm->name,
res->lockname.len, res->lockname.name);
return DLM_FORWARD;
}
memset(&unlock, 0, sizeof(unlock));
unlock.node_idx = dlm->node_num;
unlock.flags = cpu_to_be32(flags);

2
fs/ocfs2/dlm/userdlm.c
View File

@ -672,7 +672,7 @@ struct dlm_ctxt *user_dlm_register_context(struct qstr *name)
u32 dlm_key;
char *domain;
domain = kmalloc(name->len + 1, GFP_KERNEL);
domain = kmalloc(name->len + 1, GFP_NOFS);
if (!domain) {
mlog_errno(-ENOMEM);
return ERR_PTR(-ENOMEM);